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e=t.getAttribute(`data-src`);e&&t.setAttribute(`src`,e)}}),t(`click`,`#copy_url`,async function(){let e=this.parentElement?.querySelector(`pre`);if(r(e),window.isSecureContext)await navigator.clipboard.writeText(e.innerText);else{let t=window.getSelection();if(t){let n=document.createRange();n.selectNodeContents(e),t.removeAllRanges(),t.addRange(n),document.execCommand(`copy`)}}this.dataset.copiedText&&(this.innerText=this.dataset.copiedText)}),t(`click`,`.result-detail-close`,e=>{e.preventDefault(),n.closeDetail?.()}),t(`click`,`.result-detail-previous`,e=>{e.preventDefault(),n.selectPrevious?.(!1)}),t(`click`,`.result-detail-next`,e=>{e.preventDefault(),n.selectNext?.(!1)}),window.addEventListener(`hashchange`,()=>{window.location.hash!==`#image-viewer`&&n.closeDetail?.()});var s=document.querySelectorAll(`.swipe-horizontal`);for(let e of s)t(`swiped-left`,e,()=>{n.selectNext?.(!1)}),t(`swiped-right`,e,()=>{n.selectPrevious?.(!1)});window.addEventListener(`scroll`,()=>{let e=document.getElementById(`backToTop`),t=document.getElementById(`results`);if(e&&t){let e=(document.documentElement.scrollTop||document.body.scrollTop)>=100;t.classList.toggle(`scrolling`,e)}},!0); +//# sourceMappingURL=BVVCO4vX.min.js.map \ No newline at end of file diff --git a/searx/static/themes/simple/chunk/od7pNHfk.min.js.map b/searx/static/themes/simple/chunk/BVVCO4vX.min.js.map similarity index 82% rename from searx/static/themes/simple/chunk/od7pNHfk.min.js.map rename to searx/static/themes/simple/chunk/BVVCO4vX.min.js.map index 5e80d937e..4854d90c7 100644 --- a/searx/static/themes/simple/chunk/od7pNHfk.min.js.map +++ b/searx/static/themes/simple/chunk/BVVCO4vX.min.js.map @@ -1 +1 @@ -{"version":3,"file":"od7pNHfk.min.js","names":[],"sources":["../../../../../client/simple/node_modules/swiped-events/src/swiped-events.js","../../../../../client/simple/src/js/main/results.ts"],"sourcesContent":["/*!\n * swiped-events.js - v@version@\n * Pure JavaScript swipe events\n * https://github.com/john-doherty/swiped-events\n * @inspiration https://stackoverflow.com/questions/16348031/disable-scrolling-when-touch-moving-certain-element\n * @author John Doherty \n * @license MIT\n */\n(function (window, document) {\n\n 'use strict';\n\n // patch CustomEvent to allow constructor creation (IE/Chrome)\n if (typeof window.CustomEvent !== 'function') {\n\n window.CustomEvent = function (event, params) {\n\n params = params || { bubbles: false, cancelable: false, detail: undefined };\n\n var evt = document.createEvent('CustomEvent');\n evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);\n return evt;\n };\n\n window.CustomEvent.prototype = window.Event.prototype;\n }\n\n document.addEventListener('touchstart', handleTouchStart, false);\n document.addEventListener('touchmove', handleTouchMove, false);\n document.addEventListener('touchend', handleTouchEnd, false);\n\n var xDown = null;\n var yDown = null;\n var xDiff = null;\n var yDiff = null;\n var timeDown = null;\n var startEl = null;\n var touchCount = 0;\n\n /**\n * Fires swiped event if swipe detected on touchend\n * @param {object} e - browser event object\n * @returns {void}\n */\n function handleTouchEnd(e) {\n\n // if the user released on a different target, cancel!\n if (startEl !== e.target) return;\n\n var swipeThreshold = parseInt(getNearestAttribute(startEl, 'data-swipe-threshold', '20'), 10); // default 20 units\n var swipeUnit = getNearestAttribute(startEl, 'data-swipe-unit', 'px'); // default px\n var swipeTimeout = parseInt(getNearestAttribute(startEl, 'data-swipe-timeout', '500'), 10); // default 500ms\n var timeDiff = Date.now() - timeDown;\n var eventType = '';\n var changedTouches = e.changedTouches || e.touches || [];\n\n if (swipeUnit === 'vh') {\n swipeThreshold = Math.round((swipeThreshold / 100) * document.documentElement.clientHeight); // get percentage of viewport height in pixels\n }\n if (swipeUnit === 'vw') {\n swipeThreshold = Math.round((swipeThreshold / 100) * document.documentElement.clientWidth); // get percentage of viewport height in pixels\n }\n\n if (Math.abs(xDiff) > Math.abs(yDiff)) { // most significant\n if (Math.abs(xDiff) > swipeThreshold && timeDiff < swipeTimeout) {\n if (xDiff > 0) {\n eventType = 'swiped-left';\n }\n else {\n eventType = 'swiped-right';\n }\n }\n }\n else if (Math.abs(yDiff) > swipeThreshold && timeDiff < swipeTimeout) {\n if (yDiff > 0) {\n eventType = 'swiped-up';\n }\n else {\n eventType = 'swiped-down';\n }\n }\n\n if (eventType !== '') {\n\n var eventData = {\n dir: eventType.replace(/swiped-/, ''),\n touchType: (changedTouches[0] || {}).touchType || 'direct',\n fingers: touchCount, // Number of fingers used\n xStart: parseInt(xDown, 10),\n xEnd: parseInt((changedTouches[0] || {}).clientX || -1, 10),\n yStart: parseInt(yDown, 10),\n yEnd: parseInt((changedTouches[0] || {}).clientY || -1, 10)\n };\n\n // fire `swiped` event event on the element that started the swipe\n startEl.dispatchEvent(new CustomEvent('swiped', { bubbles: true, cancelable: true, detail: eventData }));\n\n // fire `swiped-dir` event on the element that started the swipe\n startEl.dispatchEvent(new CustomEvent(eventType, { bubbles: true, cancelable: true, detail: eventData }));\n }\n\n // reset values\n xDown = null;\n yDown = null;\n timeDown = null;\n }\n /**\n * Records current location on touchstart event\n * @param {object} e - browser event object\n * @returns {void}\n */\n function handleTouchStart(e) {\n\n // if the element has data-swipe-ignore=\"true\" we stop listening for swipe events\n if (e.target.getAttribute('data-swipe-ignore') === 'true') return;\n\n startEl = e.target;\n\n timeDown = Date.now();\n xDown = e.touches[0].clientX;\n yDown = e.touches[0].clientY;\n xDiff = 0;\n yDiff = 0;\n touchCount = e.touches.length;\n }\n\n /**\n * Records location diff in px on touchmove event\n * @param {object} e - browser event object\n * @returns {void}\n */\n function handleTouchMove(e) {\n\n if (!xDown || !yDown) return;\n\n var xUp = e.touches[0].clientX;\n var yUp = e.touches[0].clientY;\n\n xDiff = xDown - xUp;\n yDiff = yDown - yUp;\n }\n\n /**\n * Gets attribute off HTML element or nearest parent\n * @param {object} el - HTML element to retrieve attribute from\n * @param {string} attributeName - name of the attribute\n * @param {any} defaultValue - default value to return if no match found\n * @returns {any} attribute value or defaultValue\n */\n function getNearestAttribute(el, attributeName, defaultValue) {\n\n // walk up the dom tree looking for attributeName\n while (el && el !== document.documentElement) {\n\n var attributeValue = el.getAttribute(attributeName);\n\n if (attributeValue) {\n return attributeValue;\n }\n\n el = el.parentNode;\n }\n\n return defaultValue;\n }\n\n}(window, document));\n","// SPDX-License-Identifier: AGPL-3.0-or-later\n\nimport \"../../../node_modules/swiped-events/src/swiped-events.js\";\nimport { listen, mutable, settings } from \"../toolkit.ts\";\nimport { assertElement } from \"../util/assertElement.ts\";\n\nlet imgTimeoutID: number;\n\nconst imageLoader = (resultElement: HTMLElement): void => {\n if (imgTimeoutID) clearTimeout(imgTimeoutID);\n\n const imgElement = resultElement.querySelector(\".result-images-source img\");\n if (!imgElement) return;\n\n // use thumbnail until full image loads\n const thumbnail = resultElement.querySelector(\".image_thumbnail\");\n if (thumbnail) {\n if (thumbnail.src === `${settings.theme_static_path}/img/img_load_error.svg`) return;\n\n imgElement.onerror = (): void => {\n imgElement.src = thumbnail.src;\n };\n\n imgElement.src = thumbnail.src;\n }\n\n const imgSource = imgElement.getAttribute(\"data-src\");\n if (!imgSource) return;\n\n // unsafe nodejs specific, cast to https://developer.mozilla.org/en-US/docs/Web/API/Window/setTimeout#return_value\n // https://github.com/searxng/searxng/pull/5073#discussion_r2265767231\n imgTimeoutID = setTimeout(() => {\n imgElement.src = imgSource;\n imgElement.removeAttribute(\"data-src\");\n }, 1000) as unknown as number;\n};\n\nconst imageThumbnails: NodeListOf = document.querySelectorAll(\n \"#urls img.image_thumbnail, img.thumbnail\"\n);\nfor (const thumbnail of imageThumbnails) {\n if (thumbnail.complete && thumbnail.naturalWidth === 0) {\n thumbnail.src = `${settings.theme_static_path}/img/img_load_error.svg`;\n }\n\n thumbnail.onerror = (): void => {\n thumbnail.src = `${settings.theme_static_path}/img/img_load_error.svg`;\n };\n}\n\nconst copyUrlButton: HTMLButtonElement | null =\n document.querySelector(\"#search_url button#copy_url\");\ncopyUrlButton?.style.setProperty(\"display\", \"block\");\n\nmutable.selectImage = (resultElement: HTMLElement): void => {\n // add a class that can be evaluated in the CSS and indicates that the\n // detail view is open\n const resultsElement = document.getElementById(\"results\");\n resultsElement?.classList.add(\"image-detail-open\");\n\n // add a hash to the browser history so that pressing back doesn't return\n // to the previous page this allows us to dismiss the image details on\n // pressing the back button on mobile devices\n window.location.hash = \"#image-viewer\";\n\n mutable.scrollPageToSelected?.();\n\n // if there is no element given by the caller, stop here\n if (!resultElement) return;\n\n imageLoader(resultElement);\n};\n\nmutable.closeDetail = (): void => {\n const resultsElement = document.getElementById(\"results\");\n resultsElement?.classList.remove(\"image-detail-open\");\n\n // remove #image-viewer hash from url by navigating back\n if (window.location.hash === \"#image-viewer\") {\n window.history.back();\n }\n\n mutable.scrollPageToSelected?.();\n};\n\nlisten(\"click\", \".btn-collapse\", function (this: HTMLElement) {\n const btnLabelCollapsed = this.getAttribute(\"data-btn-text-collapsed\");\n const btnLabelNotCollapsed = this.getAttribute(\"data-btn-text-not-collapsed\");\n const target = this.getAttribute(\"data-target\");\n\n if (!(target && btnLabelCollapsed && btnLabelNotCollapsed)) return;\n\n const targetElement = document.querySelector(target);\n assertElement(targetElement);\n\n const isCollapsed = this.classList.contains(\"collapsed\");\n const newLabel = isCollapsed ? btnLabelNotCollapsed : btnLabelCollapsed;\n const oldLabel = isCollapsed ? btnLabelCollapsed : btnLabelNotCollapsed;\n\n this.innerHTML = this.innerHTML.replace(oldLabel, newLabel);\n this.classList.toggle(\"collapsed\");\n\n targetElement.classList.toggle(\"invisible\");\n});\n\nlisten(\"click\", \".media-loader\", function (this: HTMLElement) {\n const target = this.getAttribute(\"data-target\");\n if (!target) return;\n\n const iframeLoad = document.querySelector(`${target} > iframe`);\n assertElement(iframeLoad);\n\n const srctest = iframeLoad.getAttribute(\"src\");\n if (!srctest) {\n const dataSrc = iframeLoad.getAttribute(\"data-src\");\n if (dataSrc) {\n iframeLoad.setAttribute(\"src\", dataSrc);\n }\n }\n});\n\nlisten(\"click\", \"#copy_url\", async function (this: HTMLElement) {\n const target = this.parentElement?.querySelector(\"pre\");\n assertElement(target);\n\n if (window.isSecureContext) {\n await navigator.clipboard.writeText(target.innerText);\n } else {\n const selection = window.getSelection();\n if (selection) {\n const range = document.createRange();\n range.selectNodeContents(target);\n selection.removeAllRanges();\n selection.addRange(range);\n document.execCommand(\"copy\");\n }\n }\n\n if (this.dataset.copiedText) {\n this.innerText = this.dataset.copiedText;\n }\n});\n\nlisten(\"click\", \".result-detail-close\", (event: Event) => {\n event.preventDefault();\n mutable.closeDetail?.();\n});\n\nlisten(\"click\", \".result-detail-previous\", (event: Event) => {\n event.preventDefault();\n mutable.selectPrevious?.(false);\n});\n\nlisten(\"click\", \".result-detail-next\", (event: Event) => {\n event.preventDefault();\n mutable.selectNext?.(false);\n});\n\n// listen for the back button to be pressed and dismiss the image details when called\nwindow.addEventListener(\"hashchange\", () => {\n if (window.location.hash !== \"#image-viewer\") {\n mutable.closeDetail?.();\n }\n});\n\nconst swipeHorizontal: NodeListOf = document.querySelectorAll(\".swipe-horizontal\");\nfor (const element of swipeHorizontal) {\n listen(\"swiped-left\", element, () => {\n mutable.selectNext?.(false);\n });\n\n listen(\"swiped-right\", element, () => {\n mutable.selectPrevious?.(false);\n });\n}\n\nwindow.addEventListener(\n \"scroll\",\n () => {\n const backToTopElement = document.getElementById(\"backToTop\");\n const resultsElement = document.getElementById(\"results\");\n\n if (backToTopElement && resultsElement) {\n const scrollTop = document.documentElement.scrollTop || document.body.scrollTop;\n const isScrolling = scrollTop >= 100;\n 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\ No newline at end of file +{"version":3,"file":"BVVCO4vX.min.js","names":[],"sources":["../../../../../client/simple/node_modules/swiped-events/src/swiped-events.js","../../../../../client/simple/src/js/main/results.ts"],"sourcesContent":["/*!\n * swiped-events.js - v@version@\n * Pure JavaScript swipe events\n * https://github.com/john-doherty/swiped-events\n * @inspiration https://stackoverflow.com/questions/16348031/disable-scrolling-when-touch-moving-certain-element\n * @author John Doherty \n * @license MIT\n */\n(function (window, document) {\n\n 'use strict';\n\n // patch CustomEvent to allow constructor creation (IE/Chrome)\n if (typeof window.CustomEvent !== 'function') {\n\n window.CustomEvent = function (event, params) {\n\n params = params || { bubbles: false, cancelable: false, detail: undefined };\n\n var evt = document.createEvent('CustomEvent');\n evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);\n return evt;\n };\n\n window.CustomEvent.prototype = window.Event.prototype;\n }\n\n document.addEventListener('touchstart', handleTouchStart, false);\n document.addEventListener('touchmove', handleTouchMove, false);\n document.addEventListener('touchend', handleTouchEnd, false);\n\n var xDown = null;\n var yDown = null;\n var xDiff = null;\n var yDiff = null;\n var timeDown = null;\n var startEl = null;\n var touchCount = 0;\n\n /**\n * Fires swiped event if swipe detected on touchend\n * @param {object} e - browser event object\n * @returns {void}\n */\n function handleTouchEnd(e) {\n\n // if the user released on a different target, cancel!\n if (startEl !== e.target) return;\n\n var swipeThreshold = parseInt(getNearestAttribute(startEl, 'data-swipe-threshold', '20'), 10); // default 20 units\n var swipeUnit = getNearestAttribute(startEl, 'data-swipe-unit', 'px'); // default px\n var swipeTimeout = parseInt(getNearestAttribute(startEl, 'data-swipe-timeout', '500'), 10); // default 500ms\n var timeDiff = Date.now() - timeDown;\n var eventType = '';\n var changedTouches = e.changedTouches || e.touches || [];\n\n if (swipeUnit === 'vh') {\n swipeThreshold = Math.round((swipeThreshold / 100) * document.documentElement.clientHeight); // get percentage of viewport height in pixels\n }\n if (swipeUnit === 'vw') {\n swipeThreshold = Math.round((swipeThreshold / 100) * document.documentElement.clientWidth); // get percentage of viewport height in pixels\n }\n\n if (Math.abs(xDiff) > Math.abs(yDiff)) { // most significant\n if (Math.abs(xDiff) > swipeThreshold && timeDiff < swipeTimeout) {\n if (xDiff > 0) {\n eventType = 'swiped-left';\n }\n else {\n eventType = 'swiped-right';\n }\n }\n }\n else if (Math.abs(yDiff) > swipeThreshold && timeDiff < swipeTimeout) {\n if (yDiff > 0) {\n eventType = 'swiped-up';\n }\n else {\n eventType = 'swiped-down';\n }\n }\n\n if (eventType !== '') {\n\n var eventData = {\n dir: eventType.replace(/swiped-/, ''),\n touchType: (changedTouches[0] || {}).touchType || 'direct',\n fingers: touchCount, // Number of fingers used\n xStart: parseInt(xDown, 10),\n xEnd: parseInt((changedTouches[0] || {}).clientX || -1, 10),\n yStart: parseInt(yDown, 10),\n yEnd: parseInt((changedTouches[0] || {}).clientY || -1, 10)\n };\n\n // fire `swiped` event event on the element that started the swipe\n startEl.dispatchEvent(new CustomEvent('swiped', { bubbles: true, cancelable: true, detail: eventData }));\n\n // fire `swiped-dir` event on the element that started the swipe\n startEl.dispatchEvent(new CustomEvent(eventType, { bubbles: true, cancelable: true, detail: eventData }));\n }\n\n // reset values\n xDown = null;\n yDown = null;\n timeDown = null;\n }\n /**\n * Records current location on touchstart event\n * @param {object} e - browser event object\n * @returns {void}\n */\n function handleTouchStart(e) {\n\n // if the element has data-swipe-ignore=\"true\" we stop listening for swipe events\n if (e.target.getAttribute('data-swipe-ignore') === 'true') 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attributeValue = el.getAttribute(attributeName);\n\n if (attributeValue) {\n return attributeValue;\n }\n\n el = el.parentNode;\n }\n\n return defaultValue;\n }\n\n}(window, document));\n","// SPDX-License-Identifier: AGPL-3.0-or-later\n\nimport \"../../../node_modules/swiped-events/src/swiped-events.js\";\nimport { listen, mutable, settings } from \"../toolkit.ts\";\nimport { assertElement } from \"../util/assertElement.ts\";\n\nlet imgTimeoutID: number;\n\nconst imageLoader = (resultElement: HTMLElement): void => {\n if (imgTimeoutID) clearTimeout(imgTimeoutID);\n\n const imgElement = resultElement.querySelector(\".result-images-source img\");\n if (!imgElement) return;\n\n // use thumbnail until full image loads\n const thumbnail = resultElement.querySelector(\".image_thumbnail\");\n if (thumbnail) {\n if (thumbnail.src === `${settings.theme_static_path}/img/img_load_error.svg`) return;\n\n imgElement.onerror = (): void => {\n imgElement.src = thumbnail.src;\n };\n\n imgElement.src = thumbnail.src;\n }\n\n const imgSource = imgElement.getAttribute(\"data-src\");\n if (!imgSource) return;\n\n // unsafe nodejs specific, cast to https://developer.mozilla.org/en-US/docs/Web/API/Window/setTimeout#return_value\n // https://github.com/searxng/searxng/pull/5073#discussion_r2265767231\n imgTimeoutID = setTimeout(() => {\n imgElement.src = imgSource;\n imgElement.removeAttribute(\"data-src\");\n }, 1000) as unknown as number;\n};\n\nconst imageThumbnails: NodeListOf = document.querySelectorAll(\n \"#urls img.image_thumbnail, img.thumbnail\"\n);\nfor (const thumbnail of imageThumbnails) {\n if (thumbnail.complete && thumbnail.naturalWidth === 0) {\n thumbnail.src = `${settings.theme_static_path}/img/img_load_error.svg`;\n }\n\n thumbnail.onerror = (): void => {\n thumbnail.src = `${settings.theme_static_path}/img/img_load_error.svg`;\n };\n}\n\nconst copyUrlButton: HTMLButtonElement | null =\n document.querySelector(\"#search_url button#copy_url\");\ncopyUrlButton?.style.setProperty(\"display\", \"block\");\n\nmutable.selectImage = (resultElement: HTMLElement): void => {\n // add a class that can be evaluated in the CSS and indicates that the\n // detail view is open\n const resultsElement = document.getElementById(\"results\");\n resultsElement?.classList.add(\"image-detail-open\");\n\n // add a hash to the browser history so that pressing back doesn't return\n // to the previous page this allows us to dismiss the image details on\n // pressing the back button on mobile devices\n window.location.hash = \"#image-viewer\";\n\n mutable.scrollPageToSelected?.();\n\n // if there is no element given by the caller, stop here\n if (!resultElement) return;\n\n imageLoader(resultElement);\n};\n\nmutable.closeDetail = (): void => {\n const resultsElement = document.getElementById(\"results\");\n resultsElement?.classList.remove(\"image-detail-open\");\n\n // remove #image-viewer hash from url by navigating back\n if 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this.width_}setColor(e){this.color_=e}setLineCap(e){this.lineCap_=e}setLineDash(e){this.lineDash_=e}setLineDashOffset(e){this.lineDashOffset_=e}setLineJoin(e){this.lineJoin_=e}setMiterLimit(e){this.miterLimit_=e}setOffset(e){this.offset_=e}setWidth(e){this.width_=e}};function Bo(e){return e[0]>0&&e[1]>0}function Vo(e,t,n){return n===void 0&&(n=[0,0]),n[0]=e[0]*t+.5|0,n[1]=e[1]*t+.5|0,n}function Ho(e,t){return Array.isArray(e)?e:(t===void 0?t=[e,e]:(t[0]=e,t[1]=e),t)}var Uo=class e{constructor(e){this.opacity_=e.opacity,this.rotateWithView_=e.rotateWithView,this.rotation_=e.rotation,this.scale_=e.scale,this.scaleArray_=Ho(e.scale),this.displacement_=e.displacement,this.declutterMode_=e.declutterMode}clone(){let t=this.getScale();return new e({opacity:this.getOpacity(),scale:Array.isArray(t)?t.slice():t,rotation:this.getRotation(),rotateWithView:this.getRotateWithView(),displacement:this.getDisplacement().slice(),declutterMode:this.getDeclutterMode()})}getOpacity(){return this.opacity_}getRotateWithView(){return this.rotateWithView_}getRotation(){return this.rotation_}getScale(){return this.scale_}getScaleArray(){return this.scaleArray_}getDisplacement(){return this.displacement_}getDeclutterMode(){return this.declutterMode_}getAnchor(){return D()}getImage(e){return D()}getHitDetectionImage(){return D()}getPixelRatio(e){return 1}getImageState(){return D()}getImageSize(){return D()}getOrigin(){return D()}getSize(){return D()}setDisplacement(e){this.displacement_=e}setOpacity(e){this.opacity_=e}setRotateWithView(e){this.rotateWithView_=e}setRotation(e){this.rotation_=e}setScale(e){this.scale_=e,this.scaleArray_=Ho(e)}listenImageChange(e){D()}load(){D()}unlistenImageChange(e){D()}ready(){return Promise.resolve()}},Wo=class e extends Uo{constructor(e){super({opacity:1,rotateWithView:e.rotateWithView!==void 0&&e.rotateWithView,rotation:e.rotation===void 0?0:e.rotation,scale:e.scale===void 0?1:e.scale,displacement:e.displacement===void 0?[0,0]:e.displacement,declutterMode:e.declutterMode}),this.hitDetectionCanvas_=null,this.fill_=e.fill===void 0?null:e.fill,this.origin_=[0,0],this.points_=e.points,this.radius=e.radius,this.radius2_=e.radius2,this.angle_=e.angle===void 0?0:e.angle,this.stroke_=e.stroke===void 0?null:e.stroke,this.size_,this.renderOptions_,this.imageState_=this.fill_&&this.fill_.loading()?B.LOADING:B.LOADED,this.imageState_===B.LOADING&&this.ready().then(()=>this.imageState_=B.LOADED),this.render()}clone(){let t=this.getScale(),n=new e({fill:this.getFill()?this.getFill().clone():void 0,points:this.getPoints(),radius:this.getRadius(),radius2:this.getRadius2(),angle:this.getAngle(),stroke:this.getStroke()?this.getStroke().clone():void 0,rotation:this.getRotation(),rotateWithView:this.getRotateWithView(),scale:Array.isArray(t)?t.slice():t,displacement:this.getDisplacement().slice(),declutterMode:this.getDeclutterMode()});return n.setOpacity(this.getOpacity()),n}getAnchor(){let e=this.size_,t=this.getDisplacement(),n=this.getScaleArray();return[e[0]/2-t[0]/n[0],e[1]/2+t[1]/n[1]]}getAngle(){return this.angle_}getFill(){return this.fill_}setFill(e){this.fill_=e,this.render()}getHitDetectionImage(){return this.hitDetectionCanvas_||=this.createHitDetectionCanvas_(this.renderOptions_),this.hitDetectionCanvas_}getImage(e){let t=this.fill_?.getKey(),n=`${e},${this.angle_},${this.radius},${this.radius2_},${this.points_},${t}`+Object.values(this.renderOptions_).join(`,`),r=Qi.get(n,null)?.getImage(1);if(!r){let t=this.renderOptions_,i=Math.ceil(t.size*e),a=H(i,i);this.draw_(t,a,e),r=a.canvas;let o=new ea(r,void 0,null,B.LOADED,null);Qi.set(n,null,o),createImageBitmap(r).then(e=>{o.setImage(e)})}return r}getPixelRatio(e){return e}getImageSize(){return this.size_}getImageState(){return this.imageState_}getOrigin(){return this.origin_}getPoints(){return this.points_}getRadius(){return this.radius}setRadius(e){this.radius!==e&&(this.radius=e,this.render())}getRadius2(){return this.radius2_}setRadius2(e){this.radius2_!==e&&(this.radius2_=e,this.render())}getSize(){return this.size_}getStroke(){return this.stroke_}setStroke(e){this.stroke_=e,this.render()}listenImageChange(e){}load(){}unlistenImageChange(e){}calculateLineJoinSize_(e,t,n){if(t===0||this.points_===1/0||e!==`bevel`&&e!==`miter`)return t;let r=this.radius,i=this.radius2_===void 0?r:this.radius2_;if(rs&&(this.instructions.push([U.CUSTOM,s,l,e,n,_r,i]),this.hitDetectionInstructions.push([U.CUSTOM,s,l,e,r||n,_r,i]));break;case`Point`:c=e.getFlatCoordinates(),this.coordinates.push(c[0],c[1]),l=this.coordinates.length,this.instructions.push([U.CUSTOM,s,l,e,n,void 0,i]),this.hitDetectionInstructions.push([U.CUSTOM,s,l,e,r||n,void 0,i])}this.endGeometry(t)}beginGeometry(e,t,n){this.beginGeometryInstruction1_=[U.BEGIN_GEOMETRY,t,0,e,n],this.instructions.push(this.beginGeometryInstruction1_),this.beginGeometryInstruction2_=[U.BEGIN_GEOMETRY,t,0,e,n],this.hitDetectionInstructions.push(this.beginGeometryInstruction2_)}finish(){return{instructions:this.instructions,hitDetectionInstructions:this.hitDetectionInstructions,coordinates:this.coordinates}}reverseHitDetectionInstructions(){let e=this.hitDetectionInstructions;e.reverse();let t,n=e.length,r,i,a=-1;for(t=0;tthis.maxLineWidth&&(this.maxLineWidth=t.lineWidth,this.bufferedMaxExtent_=null)}else t.strokeStyle=void 0,t.lineCap=void 0,t.lineDash=null,t.lineDashOffset=void 0,t.lineJoin=void 0,t.lineWidth=void 0,t.miterLimit=void 0,t.strokeOffset=void 0;return t}setFillStrokeStyle(e,t){let n=this.state;this.fillStyleToState(e,n),this.strokeStyleToState(t,n)}createFill(e){let t=e.fillStyle,n=[U.SET_FILL_STYLE,t];return typeof t!=`string`&&n.push(e.fillPatternScale),n}applyStroke(e){this.instructions.push(this.createStroke(e))}createStroke(e){return[U.SET_STROKE_STYLE,e.strokeStyle,e.lineWidth*this.pixelRatio,e.lineCap,e.lineJoin,e.miterLimit,e.lineDash?this.applyPixelRatio(e.lineDash):null,e.lineDashOffset*this.pixelRatio]}updateFillStyle(e,t){let n=e.fillStyle;(n!==void 0&&typeof n!=`string`||e.currentFillStyle!=n)&&(this.instructions.push(t.call(this,e)),e.currentFillStyle=n)}updateStrokeStyle(e,t){let n=e.strokeStyle,r=e.lineCap,i=e.lineDash,a=e.lineDashOffset,o=e.lineJoin,s=e.lineWidth,c=e.miterLimit,l=e.strokeOffset;(e.currentStrokeStyle!=n||e.currentLineCap!=r||i!=e.currentLineDash&&!g(e.currentLineDash,i)||e.currentLineDashOffset!=a||e.currentLineJoin!=o||e.currentLineWidth!=s||e.currentMiterLimit!=c||e.currentStrokeOffset!=l)&&(t.call(this,e),e.currentStrokeStyle=n,e.currentLineCap=r,e.currentLineDash=i,e.currentLineDashOffset=a,e.currentLineJoin=o,e.currentLineWidth=s,e.currentMiterLimit=c,e.currentStrokeOffset=l)}endGeometry(e){this.beginGeometryInstruction1_[2]=this.instructions.length,this.beginGeometryInstruction1_=null,this.beginGeometryInstruction2_[2]=this.hitDetectionInstructions.length,this.beginGeometryInstruction2_=null;let t=[U.END_GEOMETRY,e];this.instructions.push(t),this.hitDetectionInstructions.push(t)}getBufferedMaxExtent(){if(!this.bufferedMaxExtent_&&(this.bufferedMaxExtent_=se(this.maxExtent),this.maxLineWidth>0)){let e=this.resolution*(this.maxLineWidth+1)/2;oe(this.bufferedMaxExtent_,e,this.bufferedMaxExtent_)}return this.bufferedMaxExtent_}},as=class extends is{constructor(e,t,n,r){super(e,t,n,r),this.hitDetectionImage_=null,this.image_=null,this.imagePixelRatio_=void 0,this.anchorX_=void 0,this.anchorY_=void 0,this.height_=void 0,this.opacity_=void 0,this.originX_=void 0,this.originY_=void 0,this.rotateWithView_=void 0,this.rotation_=void 0,this.scale_=void 0,this.width_=void 0,this.declutterMode_=void 0,this.declutterImageWithText_=void 0}drawPoint(e,t,n){if(!this.image_||this.maxExtent&&!le(this.maxExtent,e.getFlatCoordinates()))return;this.beginGeometry(e,t,n);let r=e.getFlatCoordinates(),i=e.getStride(),a=this.coordinates.length,o=this.appendFlatPointCoordinates(r,i);this.instructions.push([U.DRAW_IMAGE,a,o,this.image_,this.anchorX_*this.imagePixelRatio_,this.anchorY_*this.imagePixelRatio_,Math.ceil(this.height_*this.imagePixelRatio_),this.opacity_,this.originX_*this.imagePixelRatio_,this.originY_*this.imagePixelRatio_,this.rotateWithView_,this.rotation_,[this.scale_[0]*this.pixelRatio/this.imagePixelRatio_,this.scale_[1]*this.pixelRatio/this.imagePixelRatio_],Math.ceil(this.width_*this.imagePixelRatio_),this.declutterMode_,this.declutterImageWithText_]),this.hitDetectionInstructions.push([U.DRAW_IMAGE,a,o,this.hitDetectionImage_,this.anchorX_,this.anchorY_,this.height_,1,this.originX_,this.originY_,this.rotateWithView_,this.rotation_,this.scale_,this.width_,this.declutterMode_,this.declutterImageWithText_]),this.endGeometry(t)}drawMultiPoint(e,t,n){if(!this.image_)return;this.beginGeometry(e,t,n);let r=e.getFlatCoordinates(),i=[];for(let t=0,n=r.length;tthis.drawCircle(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,_a]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,xa,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ya,0]);let s=e.getFlatCoordinates(),c=e.getStride(),l=this.coordinates.length;this.appendFlatLineCoordinates(s,0,s.length,c,!1,!1);let u=[U.CIRCLE,l,o];this.instructions.push(ns,u),this.hitDetectionInstructions.push(ns,u),r.fillStyle!==void 0&&(this.instructions.push(es),this.hitDetectionInstructions.push(es)),r.strokeStyle!==void 0&&(this.instructions.push(ts),this.hitDetectionInstructions.push(ts)),this.endGeometry(t)}drawPolygon(e,t,n){let r=this.state,i=r.fillStyle,a=r.strokeStyle,o=r.strokeOffset;if(i===void 0&&a===void 0||this.handleStrokeOffset_(()=>this.drawPolygon(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,_a]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,xa,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ya,0]);let s=e.getEnds(),c=e.getOrientedFlatCoordinates(),l=e.getStride();this.drawFlatCoordinatess_(c,0,s,l,o),this.endGeometry(t)}drawMultiPolygon(e,t,n){let r=this.state,i=r.fillStyle,a=r.strokeStyle,o=r.strokeOffset;if(i===void 0&&a===void 0||this.handleStrokeOffset_(()=>this.drawMultiPolygon(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,_a]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,xa,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ya,0]);let s=e.getEndss(),c=e.getOrientedFlatCoordinates(),l=e.getStride(),u=0;for(let e=0,t=s.length;e0&&n!==void 0&&r!==void 0&&(t.strokeStyle=void 0,t.strokeOffset=0,e(),t.fillStyle=void 0,t.strokeStyle=r,t.strokeOffset=i,e(),t.fillStyle=n,!0)}},cs=0,ls=1;function us(e,t,n,r,i,a,o,s){let c=o-i,l=s-a,u=0,d=1;if(c===0){if(in)return!1}else{let t=(e-i)/c,r=(n-i)/c;if(t>r){let e=t;t=r,r=e}if(t>u&&(u=t),rd)return!1}if(l===0){if(ar)return!1}else{let e=(t-a)/l,n=(r-a)/l;if(e>n){let t=e;e=n,n=t}if(e>u&&(u=e),nd)return!1}return cs=u,ls=d,!0}function ds(e,t,n,r){let i=r[0],a=r[1],o=r[2],s=r[3],c=[],l=[],u=!1,d,f,p=0;for(let r=0,m=t.length;r=e){let t=(e-s+d)/d,f=qe(n,l,t),p=qe(r,u,t);c.push(f,p),a.push(c),c=[f,p],s==e&&(o+=i),s=0}else if(s0&&a.push(c),a}function ps(e,t,n,r,i){let a=n,o=n,s=0,c=0,l=n,u,d,f,p,m,h,g,_,v,y;for(d=n;de&&(c>s&&(s=c,a=l,o=d),c=0,l=d-i)),f=p,g=v,_=y),m=n,h=r}return c+=p,c>s?[l,d]:[a,o]}var ms={left:0,center:.5,right:1,top:0,middle:.5,hanging:.2,alphabetic:.8,ideographic:.8,bottom:1},hs={Circle:ss,Default:is,Image:as,LineString:os,Polygon:ss,Text:class extends is{constructor(e,t,n,r){super(e,t,n,r),this.labels_=null,this.text_=``,this.textOffsetX_=0,this.textOffsetY_=0,this.textRotateWithView_=void 0,this.textKeepUpright_=void 0,this.textRotation_=0,this.textFillState_=null,this.fillStates={},this.fillStates[_a]={fillStyle:_a},this.textStrokeState_=null,this.strokeStates={},this.textState_={},this.textStates={},this.textKey_=``,this.fillKey_=``,this.strokeKey_=``,this.declutterMode_=void 0,this.declutterImageWithText_=void 0}finish(){let e=super.finish();return e.textStates=this.textStates,e.fillStates=this.fillStates,e.strokeStates=this.strokeStates,e}drawText(e,t,n){let r=this.textFillState_,i=this.textStrokeState_,a=this.textState_;if(this.text_===``||!a||!r&&!i)return;let o=this.coordinates,s=o.length,c=e.getType(),l=null,u=e.getStride();if(a.placement===`line`&&(c==`LineString`||c==`MultiLineString`||c==`Polygon`||c==`MultiPolygon`)){let r=e.getExtent();if(!Pe(this.maxExtent,r))return;let i;if(l=e.getFlatCoordinates(),c==`LineString`)i=[l.length];else if(c==`MultiLineString`)i=e.getEnds();else if(c==`Polygon`)i=e.getEnds().slice(0,1);else if(c==`MultiPolygon`){let t=e.getEndss();i=[];for(let e=0,n=t.length;e{let r=o[(e+n)*2]===l[n*u]&&o[(e+n)*2+1]===l[n*u+1];return r||--e,r})}this.saveTextStates_();let d=a.backgroundFill?this.createFill(this.fillStyleToState(a.backgroundFill)):null,f=a.backgroundStroke?this.createStroke(this.strokeStyleToState(a.backgroundStroke)):null;this.beginGeometry(e,t,n);let p=a.padding;if(p!=wa&&(a.scale[0]<0||a.scale[1]<0)){let e=a.padding[0],t=a.padding[1],n=a.padding[2],r=a.padding[3];a.scale[0]<0&&(t=-t,r=-r),a.scale[1]<0&&(e=-e,n=-n),p=[e,t,n,r]}let m=this.pixelRatio;this.instructions.push([U.DRAW_IMAGE,s,i,null,NaN,NaN,NaN,1,0,0,this.textRotateWithView_,this.textRotation_,[1,1],NaN,this.declutterMode_,this.declutterImageWithText_,p==wa?wa:p.map(function(e){return e*m}),d,f,this.text_,this.textKey_,this.strokeKey_,this.fillKey_,this.textOffsetX_,this.textOffsetY_,r]);let h=1/m,g=d?d.slice(0):null;g&&(g[1]=_a),this.hitDetectionInstructions.push([U.DRAW_IMAGE,s,i,null,NaN,NaN,NaN,1,0,0,this.textRotateWithView_,this.textRotation_,[h,h],NaN,this.declutterMode_,this.declutterImageWithText_,p,g,f,this.text_,this.textKey_,this.strokeKey_,this.fillKey_?_a:this.fillKey_,this.textOffsetX_,this.textOffsetY_,r]),this.endGeometry(t)}}saveTextStates_(){let e=this.textStrokeState_,t=this.textState_,n=this.textFillState_,r=this.strokeKey_;e&&(r in this.strokeStates||(this.strokeStates[r]={strokeStyle:e.strokeStyle,lineCap:e.lineCap,lineDashOffset:e.lineDashOffset,lineWidth:e.lineWidth,lineJoin:e.lineJoin,miterLimit:e.miterLimit,lineDash:e.lineDash}));let i=this.textKey_;i in this.textStates||(this.textStates[i]={font:t.font,textAlign:t.textAlign||`center`,justify:t.justify,textBaseline:t.textBaseline||`middle`,scale:t.scale});let a=this.fillKey_;n&&(a in this.fillStates||(this.fillStates[a]={fillStyle:n.fillStyle}))}drawChars_(e,t){let n=this.textStrokeState_,r=this.textState_,i=this.strokeKey_,a=this.textKey_,o=this.fillKey_;this.saveTextStates_();let s=this.pixelRatio,c=ms[r.textBaseline],l=this.textOffsetX_*s,u=this.textOffsetY_*s,d=this.text_,f=n?n.lineWidth*Math.abs(r.scale[0])/2:0;this.instructions.push([U.DRAW_CHARS,e,t,c,r.overflow,o,r.maxAngle,s,u,i,f*s,d,a,1,this.declutterMode_,this.textKeepUpright_,l]),this.hitDetectionInstructions.push([U.DRAW_CHARS,e,t,c,r.overflow,o&&_a,r.maxAngle,s,u,i,f*s,d,a,1/s,this.declutterMode_,this.textKeepUpright_,l])}setTextStyle(e,t){let n,r,i;if(!e)this.text_=``;else{let t=e.getFill();t?(r=this.textFillState_,r||(r={},this.textFillState_=r),r.fillStyle=na(t.getColor()||`#000`)):(r=null,this.textFillState_=r);let a=e.getStroke();if(!a)i=null,this.textStrokeState_=i;else{i=this.textStrokeState_,i||(i={},this.textStrokeState_=i);let e=a.getLineDash(),t=a.getLineDashOffset(),n=a.getWidth(),r=a.getMiterLimit();i.lineCap=a.getLineCap()||`round`,i.lineDash=e?e.slice():ya,i.lineDashOffset=t===void 0?0:t,i.lineJoin=a.getLineJoin()||`round`,i.lineWidth=n===void 0?1:n,i.miterLimit=r===void 0?10:r,i.strokeStyle=na(a.getColor()||`#000`)}n=this.textState_;let o=e.getFont()||`10px sans-serif`;ja(o);let s=e.getScaleArray();n.overflow=e.getOverflow(),n.font=o,n.maxAngle=e.getMaxAngle(),n.placement=e.getPlacement(),n.textAlign=e.getTextAlign(),n.repeat=e.getRepeat(),n.justify=e.getJustify(),n.textBaseline=e.getTextBaseline()||`middle`,n.backgroundFill=e.getBackgroundFill(),n.backgroundStroke=e.getBackgroundStroke(),n.padding=e.getPadding()||wa,n.scale=s===void 0?[1,1]:s;let c=e.getOffsetX(),l=e.getOffsetY(),u=e.getRotateWithView(),d=e.getKeepUpright(),f=e.getRotation();this.text_=e.getText()||``,this.textOffsetX_=c===void 0?0:c,this.textOffsetY_=l===void 0?0:l,this.textRotateWithView_=u!==void 0&&u,this.textKeepUpright_=d===void 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t=this.getDisplacement(),n=this.getScaleArray();return[e[0]-t[0]/n[0],e[1]+t[1]/n[1]]}setAnchor(e){this.anchor_=e,this.normalizedAnchor_=null}getColor(){return this.color_}setColor(e){let t=e?Ji(e):null;if(this.color_===t||this.color_&&t&&this.color_.length===t.length&&this.color_.every((e,n)=>e===t[n]))return;this.color_=t;let n=this.getSrc(),r=n===void 0?this.getHitDetectionImage():null,i=n===void 0?this.iconImage_.getImageState():B.IDLE;this.iconImage_=ta(r,n,{crossOrigin:this.crossOrigin_,referrerPolicy:this.referrerPolicy_},i,this.color_)}getImage(e){return this.iconImage_.getImage(e)}getPixelRatio(e){return this.iconImage_.getPixelRatio(e)}getImageSize(){return this.iconImage_.getSize()}getImageState(){return this.iconImage_.getImageState()}getHitDetectionImage(){return this.iconImage_.getHitDetectionImage()}getOrigin(){if(this.origin_)return this.origin_;let e=this.offset_;if(this.offsetOrigin_!=`top-left`){let t=this.getSize(),n=this.iconImage_.getSize();if(!t||!n)return 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this.initialOptions_,super.setScale(e)}listenImageChange(e){this.iconImage_.addEventListener(c.CHANGE,e)}load(){this.iconImage_.load()}unlistenImageChange(e){this.iconImage_.removeEventListener(c.CHANGE,e)}ready(){return this.iconImage_.ready()}},Us=.5;function Ws(e,t,n,r,i,a,o,s,c){let l=c?Mn(i,c):i,u=H(e[0]*Us,e[1]*Us);u.imageSmoothingEnabled=!1;let f=u.canvas,p=new za(u,Us,i,null,o,s,c?wn(kn(),c):null),m=n.length,h=Math.floor(16777215/m),g={};for(let e=1;e<=m;++e){let t=n[e-1],i=t.getStyleFunction()||r;if(!i)continue;let o=i(t,a);if(!o)continue;Array.isArray(o)||(o=[o]);let s=(e*h).toString(16).padStart(7,`#00000`);for(let e=0,n=o.length;ethis.maxStaleKeys&&(this.staleKeys_.length=this.maxStaleKeys)}updateStaleKeys(e){this.renderedSourceKey_?this.renderedSourceKey_!==e&&(this.prependStaleKey(this.renderedSourceKey_),this.renderedSourceKey_=e):this.renderedSourceKey_=e}getFeatures(e){return D()}getData(e){return null}prepareFrame(e){return D()}renderFrame(e,t){return 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e=c===1?a.targetResolution:a.sourceResolution+c*(a.targetResolution-a.sourceResolution);if(a.anchor){let t=this.getViewportSize_(this.getRotation()),n=this.constraints_.resolution(e,0,t,!0);this.targetCenter_=this.calculateCenterZoom(n,a.anchor)}this.nextResolution_=a.targetResolution,this.targetResolution_=e,this.applyTargetState_(!0)}if(a.sourceRotation!==void 0&&a.targetRotation!==void 0){let e=c===1?Ke(a.targetRotation+Math.PI,2*Math.PI)-Math.PI:a.sourceRotation+c*(a.targetRotation-a.sourceRotation);if(a.anchor){let t=this.constraints_.rotation(e,!0);this.targetCenter_=this.calculateCenterRotate(t,a.anchor)}this.nextRotation_=a.targetRotation,this.targetRotation_=e}if(this.applyTargetState_(!0),t=!0,!a.complete)break}if(i){this.animations_[n]=null,this.setHint($o.ANIMATING,-1),this.nextCenter_=null,this.nextResolution_=NaN,this.nextRotation_=NaN;let e=r[0].callback;e&&Wl(e,!0)}}this.animations_=this.animations_.filter(Boolean),t&&this.updateAnimationKey_===void 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this.dragging_||Math.abs(e.clientX-this.down_.clientX)>this.moveTolerance_||Math.abs(e.clientY-this.down_.clientY)>this.moveTolerance_}disposeInternal(){this.relayedListenerKey_&&=(s(this.relayedListenerKey_),null),this.element_.removeEventListener(c.TOUCHMOVE,this.boundHandleTouchMove_),this.pointerdownListenerKey_&&=(s(this.pointerdownListenerKey_),null),this.dragListenerKeys_.forEach(s),this.dragListenerKeys_.length=0,this.element_=null,super.disposeInternal()}},su={POSTRENDER:`postrender`,MOVESTART:`movestart`,MOVEEND:`moveend`,LOADSTART:`loadstart`,LOADEND:`loadend`},cu={LAYERGROUP:`layergroup`,SIZE:`size`,TARGET:`target`,VIEW:`view`},lu=1/0,uu=class{constructor(e,t){this.priorityFunction_=e,this.keyFunction_=t,this.elements_=[],this.priorities_=[],this.queuedElements_={}}clear(){this.elements_.length=0,this.priorities_.length=0,r(this.queuedElements_)}dequeue(){let e=this.elements_,t=this.priorities_,n=e[0];e.length==1?(e.length=0,t.length=0):(e[0]=e.pop(),t[0]=t.pop(),this.siftUp_(0));let r=this.keyFunction_(n);return delete this.queuedElements_[r],n}enqueue(e){M(!(this.keyFunction_(e)in this.queuedElements_),"Tried to enqueue an `element` that was already added to the queue");let t=this.priorityFunction_(e);return t!=1/0&&(this.elements_.push(e),this.priorities_.push(t),this.queuedElements_[this.keyFunction_(e)]=!0,this.siftDown_(0,this.elements_.length-1),!0)}getCount(){return this.elements_.length}getLeftChildIndex_(e){return e*2+1}getRightChildIndex_(e){return e*2+2}getParentIndex_(e){return e-1>>1}heapify_(){let e;for(e=(this.elements_.length>>1)-1;e>=0;e--)this.siftUp_(e)}isEmpty(){return this.elements_.length===0}isKeyQueued(e){return e in this.queuedElements_}isQueued(e){return this.isKeyQueued(this.keyFunction_(e))}siftUp_(e){let t=this.elements_,n=this.priorities_,r=t.length,i=t[e],a=n[e],o=e;for(;e>1;){let i=this.getLeftChildIndex_(e),a=this.getRightChildIndex_(e),o=ae;){let e=this.getParentIndex_(t);if(r[e]>a)n[t]=n[e],r[t]=r[e],t=e;else break}n[t]=i,r[t]=a}reprioritize(){let e=this.priorityFunction_,t=this.elements_,n=this.priorities_,r=0,i=t.length,a,o,s;for(o=0;oe.apply(null,t),e=>e[0].getKey()),this.boundHandleTileChange_=this.handleTileChange.bind(this),this.tileChangeCallback_=t,this.tilesLoading_=0,this.tilesLoadingKeys_={}}enqueue(e){let t=super.enqueue(e);return t&&e[0].addEventListener(c.CHANGE,this.boundHandleTileChange_),t}getTilesLoading(){return this.tilesLoading_}handleTileChange(e){let t=e.target,n=t.getState();if(n===V.LOADED||n===V.ERROR||n===V.EMPTY){n!==V.ERROR&&t.removeEventListener(c.CHANGE,this.boundHandleTileChange_);let e=t.getKey();e in this.tilesLoadingKeys_&&(delete this.tilesLoadingKeys_[e],--this.tilesLoading_),this.tileChangeCallback_()}}loadMoreTiles(e,t){let n=0;for(;this.tilesLoading_0;){let e=this.dequeue()[0],t=e.getKey();e.getState()===V.IDLE&&!(t in this.tilesLoadingKeys_)&&(this.tilesLoadingKeys_[t]=!0,++this.tilesLoading_,++n,e.load())}}};function fu(e,t,n,r,i){if(!e||!(n in e.wantedTiles)||!e.wantedTiles[n][t.getKey()])return lu;let a=e.viewState.center,o=r[0]-a[0],s=r[1]-a[1];return 65536*Math.log(i)+Math.sqrt(o*o+s*s)/i}var pu=class extends j{constructor(e){super();let t=e.element;t&&!e.target&&!t.style.pointerEvents&&(t.style.pointerEvents=`auto`),this.element=t||null,this.target_=null,this.map_=null,this.listenerKeys=[],e.render&&(this.render=e.render),e.target&&this.setTarget(e.target)}disposeInternal(){this.element?.remove(),super.disposeInternal()}getMap(){return this.map_}setMap(e){this.map_&&this.element?.remove();for(let e=0,t=this.listenerKeys.length;et.getAttributions(e)));if(this.attributions_!==void 0&&(Array.isArray(this.attributions_)?this.attributions_.forEach(e=>n.add(e)):n.add(this.attributions_)),!this.overrideCollapsible_){let e=!t.some(e=>e.getSource()?.getAttributionsCollapsible()===!1);this.setCollapsible(e)}return Array.from(n)}async updateElement_(e){if(!e){this.renderedVisible_&&=(this.element.style.display=`none`,!1);return}let t=await Promise.all(this.collectSourceAttributions_(e).map(e=>S(()=>e))),n=t.length>0;if(this.renderedVisible_!=n&&(this.element.style.display=n?``:`none`,this.renderedVisible_=n),!g(t,this.renderedAttributions_)){mi(this.ulElement_);for(let e=0,n=t.length;e0&&t%(2*Math.PI)!=0?e.animate({rotation:0,duration:this.duration_,easing:oi}):e.setRotation(0))}render(e){let t=e.frameState;if(!t)return;let n=t.viewState.rotation;if(n!=this.rotation_){let e=`rotate(`+n+`rad)`;if(this.autoHide_){let e=this.element.classList.contains(ca);!e&&n===0?this.element.classList.add(ca):e&&n!==0&&this.element.classList.remove(ca)}this.label_.style.transform=e}this.rotation_=n}},gu=class extends pu{constructor(e){e||={},super({element:document.createElement(`div`),target:e.target});let t=e.className===void 0?`ol-zoom`:e.className,n=e.delta===void 0?1:e.delta,r=e.zoomInClassName===void 0?t+`-in`:e.zoomInClassName,i=e.zoomOutClassName===void 0?t+`-out`:e.zoomOutClassName,a=e.zoomInLabel===void 0?`+`:e.zoomInLabel,o=e.zoomOutLabel===void 0?`–`:e.zoomOutLabel,s=e.zoomInTipLabel===void 0?`Zoom in`:e.zoomInTipLabel,l=e.zoomOutTipLabel===void 0?`Zoom out`:e.zoomOutTipLabel,u=document.createElement(`button`);u.className=r,u.setAttribute(`type`,`button`),u.title=s,u.appendChild(typeof a==`string`?document.createTextNode(a):a),u.addEventListener(c.CLICK,this.handleClick_.bind(this,n),!1);let d=document.createElement(`button`);d.className=i,d.setAttribute(`type`,`button`),d.title=l,d.appendChild(typeof o==`string`?document.createTextNode(o):o),d.addEventListener(c.CLICK,this.handleClick_.bind(this,-n),!1);let f=t+` `+la+` `+ua,p=this.element;p.className=f,p.appendChild(u),p.appendChild(d),this.duration_=e.duration===void 0?250:e.duration}handleClick_(e,t){t.preventDefault(),this.zoomByDelta_(e)}zoomByDelta_(e){let t=this.getMap().getView();if(!t)return;let n=t.getZoom();if(n!==void 0){let r=t.getConstrainedZoom(n+e);this.duration_>0?(t.getAnimating()&&t.cancelAnimations(),t.animate({zoom:r,duration:this.duration_,easing:oi})):t.setZoom(r)}}};function _u(e){e||={};let t=new ne;return(e.zoom===void 0||e.zoom)&&t.push(new gu(e.zoomOptions)),(e.rotate===void 0||e.rotate)&&t.push(new hu(e.rotateOptions)),(e.attribution===void 0||e.attribution)&&t.push(new mu(e.attributionOptions)),t}var vu={ACTIVE:`active`},yu=class extends j{constructor(e){super(),this.on,this.once,this.un,e&&e.handleEvent&&(this.handleEvent=e.handleEvent),this.map_=null,this.setActive(!0)}getActive(){return this.get(vu.ACTIVE)}getMap(){return this.map_}handleEvent(e){return!0}setActive(e){this.set(vu.ACTIVE,e)}setMap(e){this.map_=e}};function bu(e,t,n){let r=e.getCenterInternal();if(r){let i=[r[0]+t[0],r[1]+t[1]];e.animateInternal({duration:n===void 0?250:n,easing:ci,center:e.getConstrainedCenter(i)})}}function xu(e,t,n,r){let i=e.getZoom();if(i===void 0)return;let a=e.getConstrainedZoom(i+t),o=e.getResolutionForZoom(a);e.getAnimating()&&e.cancelAnimations(),e.animate({resolution:o,anchor:n,duration:r===void 0?250:r,easing:oi})}var Su=class extends yu{constructor(e){super(),e||={},this.delta_=e.delta?e.delta:1,this.duration_=e.duration===void 0?250:e.duration}handleEvent(e){let t=!1;if(e.type==$.DBLCLICK){let n=e.originalEvent,r=e.map,i=e.coordinate,a=n.shiftKey?-this.delta_:this.delta_;xu(r.getView(),a,i,this.duration_),n.preventDefault(),t=!0}return!t}};function Cu(e){let t=arguments;return function(e){let n=!0;for(let r=0,i=t.length;r0}}else if(e.type==$.POINTERDOWN){let n=this.handleDownEvent(e);this.handlingDownUpSequence=n,t=this.stopDown(n)}else e.type==$.POINTERMOVE&&this.handleMoveEvent(e);return!t}handleMoveEvent(e){}handleUpEvent(e){return!1}stopDown(e){return e}updateTrackedPointers_(e){e.activePointers&&(this.targetPointers=e.activePointers)}};function Iu(e){let t=e.length,n=0,r=0;for(let i=0;i0&&this.condition_(e)){let t=e.map.getView();return this.lastCentroid=null,t.getAnimating()&&t.cancelAnimations(),this.kinetic_&&this.kinetic_.begin(),this.noKinetic_=this.targetPointers.length>1,!0}return!1}},Ru=class extends Fu{constructor(e){e||={},super({stopDown:y}),this.condition_=e.condition?e.condition:wu,this.lastAngle_=void 0,this.duration_=e.duration===void 0?250:e.duration}handleDragEvent(e){if(!Nu(e))return;let t=e.map,n=t.getView();if(n.getConstraints().rotation===Rl)return;let r=t.getSize(),i=e.pixel,a=Math.atan2(r[1]/2-i[1],i[0]-r[0]/2);if(this.lastAngle_!==void 0){let e=a-this.lastAngle_;n.adjustRotationInternal(-e)}this.lastAngle_=a}handleUpEvent(e){return!Nu(e)||(e.map.getView().endInteraction(this.duration_),!1)}handleDownEvent(e){return Nu(e)&&Ou(e)&&this.condition_(e)?(e.map.getView().beginInteraction(),this.lastAngle_=void 0,!0):!1}},zu=class extends l{constructor(e){super(),this.geometry_=null,this.element_=document.createElement(`div`),this.element_.style.position=`absolute`,this.element_.style.pointerEvents=`auto`,this.element_.className=`ol-box `+e,this.map_=null,this.startPixel_=null,this.endPixel_=null}disposeInternal(){this.setMap(null)}render_(){let e=this.startPixel_,t=this.endPixel_,n=this.element_.style;n.left=Math.min(e[0],t[0])+`px`,n.top=Math.min(e[1],t[1])+`px`,n.width=Math.abs(t[0]-e[0])+`px`,n.height=Math.abs(t[1]-e[1])+`px`}setMap(e){if(this.map_){this.map_.getOverlayContainer().removeChild(this.element_);let e=this.element_.style;e.left=`inherit`,e.top=`inherit`,e.width=`inherit`,e.height=`inherit`}this.map_=e,this.map_&&this.map_.getOverlayContainer().appendChild(this.element_)}setPixels(e,t){this.startPixel_=e,this.endPixel_=t,this.createOrUpdateGeometry(),this.render_()}createOrUpdateGeometry(){if(!this.map_)return;let e=this.startPixel_,t=this.endPixel_,n=[e,[e[0],t[1]],t,[t[0],e[1]]].map(this.map_.getCoordinateFromPixelInternal,this.map_);n[4]=n[0].slice(),this.geometry_?this.geometry_.setCoordinates([n]):this.geometry_=new qr([n])}getGeometry(){return this.geometry_}},Bu={BOXSTART:`boxstart`,BOXDRAG:`boxdrag`,BOXEND:`boxend`,BOXCANCEL:`boxcancel`},Vu=class extends C{constructor(e,t,n){super(e),this.coordinate=t,this.mapBrowserEvent=n}},Hu=class extends Fu{constructor(e){super(),this.on,this.once,this.un,e??={},this.box_=new zu(e.className||`ol-dragbox`),this.minArea_=e.minArea??64,e.onBoxEnd&&(this.onBoxEnd=e.onBoxEnd),this.startPixel_=null,this.condition_=e.condition??Ou,this.boxEndCondition_=e.boxEndCondition??this.defaultBoxEndCondition}defaultBoxEndCondition(e,t,n){let r=n[0]-t[0],i=n[1]-t[1];return r*r+i*i>=this.minArea_}getGeometry(){return this.box_.getGeometry()}handleDragEvent(e){this.startPixel_&&(this.box_.setPixels(this.startPixel_,e.pixel),this.dispatchEvent(new Vu(Bu.BOXDRAG,e.coordinate,e)))}handleUpEvent(e){if(!this.startPixel_)return!1;let t=this.boxEndCondition_(e,this.startPixel_,e.pixel);return t&&this.onBoxEnd(e),this.dispatchEvent(new Vu(t?Bu.BOXEND:Bu.BOXCANCEL,e.coordinate,e)),this.box_.setMap(null),this.startPixel_=null,!1}handleDownEvent(e){return this.condition_(e)?(this.startPixel_=e.pixel,this.box_.setMap(e.map),this.box_.setPixels(this.startPixel_,this.startPixel_),this.dispatchEvent(new Vu(Bu.BOXSTART,e.coordinate,e)),!0):!1}onBoxEnd(e){}setActive(e){e||(this.box_.setMap(null),this.startPixel_&&=(this.dispatchEvent(new Vu(Bu.BOXCANCEL,this.startPixel_,null)),null)),super.setActive(e)}setMap(e){this.getMap()&&(this.box_.setMap(null),this.startPixel_&&=(this.dispatchEvent(new Vu(Bu.BOXCANCEL,this.startPixel_,null)),null)),super.setMap(e)}},Uu=class extends Hu{constructor(e){e||={};let t=e.condition?e.condition:ju;super({condition:t,className:e.className||`ol-dragzoom`,minArea:e.minArea}),this.duration_=e.duration===void 0?200:e.duration,this.out_=e.out!==void 0&&e.out}onBoxEnd(e){let t=this.getMap().getView(),n=this.getGeometry();if(this.out_){let e=t.rotatedExtentForGeometry(n),r=t.getResolutionForExtentInternal(e),i=t.getResolution()/r;n=n.clone(),n.scale(i*i)}t.fitInternal(n,{duration:this.duration_,easing:oi})}},Wu={LEFT:`ArrowLeft`,UP:`ArrowUp`,RIGHT:`ArrowRight`,DOWN:`ArrowDown`},Gu=class extends yu{constructor(e){super(),e||={},this.defaultCondition_=function(e){return ku(e)&&Mu(e)},this.condition_=e.condition===void 0?this.defaultCondition_:e.condition,this.duration_=e.duration===void 0?100:e.duration,this.pixelDelta_=e.pixelDelta===void 0?128:e.pixelDelta}handleEvent(e){let t=!1;if(e.type==c.KEYDOWN){let n=e.originalEvent,r=n.key;if(this.condition_(e)&&(r==Wu.DOWN||r==Wu.LEFT||r==Wu.RIGHT||r==Wu.UP)){let i=e.map.getView(),a=i.getResolution()*this.pixelDelta_,o=0,s=0;r==Wu.DOWN?s=-a:r==Wu.LEFT?o=-a:r==Wu.RIGHT?o=a:s=a;let c=[o,s];it(c,i.getRotation()),bu(i,c,this.duration_),n.preventDefault(),t=!0}}return!t}},Ku=class extends yu{constructor(e){super(),e||={},this.condition_=e.condition?e.condition:function(e){return!Au(e)&&Mu(e)},this.delta_=e.delta?e.delta:1,this.duration_=e.duration===void 0?100:e.duration}handleEvent(e){let t=!1;if(e.type==c.KEYDOWN||e.type==c.KEYPRESS){let n=e.originalEvent,r=n.key;if(this.condition_(e)&&(r===`+`||r===`-`)){let i=e.map,a=r===`+`?this.delta_:-this.delta_;xu(i.getView(),a,void 0,this.duration_),n.preventDefault(),t=!0}}return!t}},qu=40,Ju=300,Yu=3,Xu=class extends yu{constructor(e){e||={},super(e),this.totalDelta_=0,this.lastDelta_=0,this.maxDelta_=e.maxDelta===void 0?1:e.maxDelta,this.duration_=e.duration===void 0?250:e.duration,this.timeout_=e.timeout===void 0?80:e.timeout,this.useAnchor_=e.useAnchor===void 0||e.useAnchor,this.constrainResolution_=e.constrainResolution!==void 0&&e.constrainResolution;let t=e.condition?e.condition:Du;this.condition_=e.onFocusOnly?Cu(Eu,t):t,this.lastAnchor_=null,this.startTime_=void 0,this.timeoutId_,this.mode_=void 0,this.trackpadEventGap_=400,this.trackpadTimeoutId_,this.deltaPerZoom_=300,this.ctrlKeyPressed_=!1,this.ctrlKeyListenerKeys_=[]}setMap(e){if(this.ctrlKeyListenerKeys_.forEach(s),this.ctrlKeyListenerKeys_.length=0,this.ctrlKeyPressed_=!1,super.setMap(e),e){let t=e.getOwnerDocument();this.ctrlKeyListenerKeys_.push(a(t,`keydown`,e=>{e.key===`Control`&&(this.ctrlKeyPressed_=!0)}),a(t,`keyup`,e=>{e.key===`Control`&&(this.ctrlKeyPressed_=!1)}))}}endInteraction_(){this.trackpadTimeoutId_=void 0;let e=this.getMap();if(!e)return;let t=e.getView(),n=this.lastDelta_?this.lastDelta_>0?1:-1:0;t.endInteraction(this.constrainResolution_||t.getConstrainResolution()?100:void 0,n,this.lastAnchor_?e.getCoordinateFromPixel(this.lastAnchor_):null)}handleEvent(e){if(!this.condition_(e)||e.type!==c.WHEEL)return!0;let t=e.map,n=e.originalEvent;n.preventDefault();let r=n.ctrlKey&&!this.ctrlKeyPressed_;n.ctrlKey||(this.ctrlKeyPressed_=!1),this.useAnchor_&&(this.lastAnchor_=e.pixel);let i=n.deltaY;switch(n.deltaMode){case WheelEvent.DOM_DELTA_LINE:i*=qu;break;case WheelEvent.DOM_DELTA_PAGE:i*=Ju}if(i===0)return!1;this.lastDelta_=i;let a=Date.now();this.startTime_===void 0&&(this.startTime_=a),(!this.mode_||a-this.startTime_>this.trackpadEventGap_)&&(this.mode_=Math.abs(i)<4?`trackpad`:`wheel`);let o=t.getView();if(this.mode_===`trackpad`)return this.trackpadTimeoutId_?clearTimeout(this.trackpadTimeoutId_):(o.getAnimating()&&o.cancelAnimations(),o.beginInteraction()),this.trackpadTimeoutId_=setTimeout(this.endInteraction_.bind(this),this.timeout_),r&&(i*=Yu),o.adjustZoom(-i/this.deltaPerZoom_,this.lastAnchor_?t.getCoordinateFromPixel(this.lastAnchor_):null),this.startTime_=a,!1;this.totalDelta_+=i;let s=Math.max(this.timeout_-(a-this.startTime_),0);return clearTimeout(this.timeoutId_),this.timeoutId_=setTimeout(this.handleWheelZoom_.bind(this,t),s),!1}handleWheelZoom_(e){let t=e.getView();t.getAnimating()&&t.cancelAnimations();let n=-L(this.totalDelta_,-this.maxDelta_*this.deltaPerZoom_,this.maxDelta_*this.deltaPerZoom_)/this.deltaPerZoom_;(t.getConstrainResolution()||this.constrainResolution_)&&(n=n?n>0?1:-1:0),xu(t,n,this.lastAnchor_?e.getCoordinateFromPixel(this.lastAnchor_):null,this.duration_),this.mode_=void 0,this.totalDelta_=0,this.lastAnchor_=null,this.startTime_=void 0,this.timeoutId_=void 0}setMouseAnchor(e){this.useAnchor_=e,e||(this.lastAnchor_=null)}},Zu=class extends Fu{constructor(e){e||={};let t=e;t.stopDown||=y,super(t),this.anchor_=null,this.lastAngle_=void 0,this.rotating_=!1,this.rotationDelta_=0,this.threshold_=e.threshold===void 0?.3:e.threshold,this.duration_=e.duration===void 0?250:e.duration}handleDragEvent(e){let t=0,n=this.targetPointers[0],r=this.targetPointers[1],i=Math.atan2(r.clientY-n.clientY,r.clientX-n.clientX);if(this.lastAngle_!==void 0){let e=i-this.lastAngle_;this.rotationDelta_+=e,!this.rotating_&&Math.abs(this.rotationDelta_)>this.threshold_&&(this.rotating_=!0),t=e}this.lastAngle_=i;let a=e.map,o=a.getView();o.getConstraints().rotation!==Rl&&(this.anchor_=a.getCoordinateFromPixelInternal(a.getEventPixel(Iu(this.targetPointers))),this.rotating_&&(a.render(),o.adjustRotationInternal(t,this.anchor_)))}handleUpEvent(e){return this.targetPointers.length<2?(e.map.getView().endInteraction(this.duration_),!1):!0}handleDownEvent(e){if(this.targetPointers.length>=2){let t=e.map;return this.anchor_=null,this.lastAngle_=void 0,this.rotating_=!1,this.rotationDelta_=0,this.handlingDownUpSequence||t.getView().beginInteraction(),!0}return!1}},Qu=class extends Fu{constructor(e){e||={};let t=e;t.stopDown||=y,super(t),this.anchor_=null,this.duration_=e.duration===void 0?400:e.duration,this.lastDistance_=void 0,this.lastScaleDelta_=1}handleDragEvent(e){let t=1,n=this.targetPointers[0],r=this.targetPointers[1],i=n.clientX-r.clientX,a=n.clientY-r.clientY,o=Math.sqrt(i*i+a*a);this.lastDistance_!==void 0&&(t=this.lastDistance_/o),this.lastDistance_=o;let s=e.map,c=s.getView();t!=1&&(this.lastScaleDelta_=t),this.anchor_=s.getCoordinateFromPixelInternal(s.getEventPixel(Iu(this.targetPointers))),s.render(),c.adjustResolutionInternal(t,this.anchor_)}handleUpEvent(e){if(this.targetPointers.length<2){let t=e.map.getView(),n=this.lastScaleDelta_>1?1:-1;return t.endInteraction(this.duration_,n),!1}return!0}handleDownEvent(e){if(this.targetPointers.length>=2){let t=e.map;return this.anchor_=null,this.lastDistance_=void 0,this.lastScaleDelta_=1,this.handlingDownUpSequence||t.getView().beginInteraction(),!0}return!1}};function $u(e){e||={};let t=new ne,n=new bi(-.005,.05,100);return(e.altShiftDragRotate===void 0||e.altShiftDragRotate)&&t.push(new Ru),(e.doubleClickZoom===void 0||e.doubleClickZoom)&&t.push(new Su({delta:e.zoomDelta,duration:e.zoomDuration})),(e.dragPan===void 0||e.dragPan)&&t.push(new Lu({onFocusOnly:e.onFocusOnly,kinetic:n})),(e.pinchRotate===void 0||e.pinchRotate)&&t.push(new Zu),(e.pinchZoom===void 0||e.pinchZoom)&&t.push(new Qu({duration:e.zoomDuration})),(e.keyboard===void 0||e.keyboard)&&(t.push(new Gu),t.push(new Ku({delta:e.zoomDelta,duration:e.zoomDuration}))),(e.mouseWheelZoom===void 0||e.mouseWheelZoom)&&t.push(new Xu({onFocusOnly:e.onFocusOnly,duration:e.zoomDuration})),(e.shiftDragZoom===void 0||e.shiftDragZoom)&&t.push(new Uu({duration:e.zoomDuration})),t}var ed={ADDLAYER:`addlayer`,REMOVELAYER:`removelayer`},td=class extends C{constructor(e,t){super(e),this.layer=t}},nd={LAYERS:`layers`},rd=class e extends Xl{constructor(e){e||={};let t=Object.assign({},e);delete t.layers;let n=e.layers;super(t),this.on,this.once,this.un,this.layersListenerKeys_=[],this.listenerKeys_={},this.addChangeListener(nd.LAYERS,this.handleLayersChanged_),n?Array.isArray(n)?n=new ne(n.slice(),{unique:!0}):M(typeof n.getArray==`function`,"Expected `layers` to be an array or a `Collection`"):n=new ne(void 0,{unique:!0}),this.setLayers(n)}handleLayerChange_(){this.changed()}handleLayersChanged_(){this.layersListenerKeys_.forEach(s),this.layersListenerKeys_.length=0;let e=this.getLayers();this.layersListenerKeys_.push(a(e,t.ADD,this.handleLayersAdd_,this),a(e,t.REMOVE,this.handleLayersRemove_,this));for(let e in this.listenerKeys_)this.listenerKeys_[e].forEach(s);r(this.listenerKeys_);let n=e.getArray();for(let e=0,t=n.length;e=0;--i){let a=m[i],d=a.layer;if(d.hasRenderer()&&Ql(a,l)&&o.call(s,d)){let i=d.getRenderer(),o=d.getSource();if(i&&o){let s=o.getWrapX()?f:e,l=u.bind(null,a.managed);_[0]=s[0]+p[r][0],_[1]=s[1]+p[r][1],c=i.forEachFeatureAtCoordinate(_,t,n,l,g)}if(c)return 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r=t[n];if(!(r.getMap()!==this||!r.getActive()||!this.getTargetElement())&&(!r.handleEvent(e)||e.propagationStopped))break}}}handlePostRender(){let e=this.frameState_,t=this.tileQueue_;if(!t.isEmpty()){let n=this.maxTilesLoading_,r=n,i=e?e.viewHints:void 0,a=i?i[$o.ANIMATING]||i[$o.INTERACTING]:!1;if(a){let t=Date.now()-e.time>8;n=t?0:8,r=t?0:2}t.getTilesLoading(){this.postRenderTimeoutHandle_=void 0,this.handlePostRender()},0)}setLayerGroup(e){let t=this.getLayerGroup();t&&this.handleLayerRemove_(new td(`removelayer`,t)),this.set(cu.LAYERGROUP,e)}setSize(e){this.set(cu.SIZE,e)}setTarget(e){this.set(cu.TARGET,e)}setView(e){if(!e||e instanceof Ul){this.set(cu.VIEW,e);return}this.set(cu.VIEW,new Ul);let t=this;e.then(function(e){t.setView(new Ul(e))})}updateSize(){let e=this.getTargetElement(),t;if(e){let n,r;if(_i(e)){let t=e.getContext(`2d`).getTransform();n=e.width/t.a,r=e.height/t.d}else{let t=getComputedStyle(e);n=e.offsetWidth-parseFloat(t.borderLeftWidth)-parseFloat(t.paddingLeft)-parseFloat(t.paddingRight)-parseFloat(t.borderRightWidth),r=e.offsetHeight-parseFloat(t.borderTopWidth)-parseFloat(t.paddingTop)-parseFloat(t.paddingBottom)-parseFloat(t.borderBottomWidth)}!isNaN(n)&&!isNaN(r)&&(t=[Math.max(0,n),Math.max(0,r)],!Bo(t)&&(e.offsetWidth||e.offsetHeight||e.getClientRects().length)&&tt(`No map visible because the map container's width or height are 0.`))}let n=this.getSize();t&&(!n||!g(t,n))&&(this.updateViewportSize_(t),this.setSize(t))}updateViewportSize_(e){let t=this.getView();t&&t.setViewportSize(e)}};function ud(e){let t=null;e.keyboardEventTarget!==void 0&&(t=typeof e.keyboardEventTarget==`string`?document.getElementById(e.keyboardEventTarget):e.keyboardEventTarget);let n={},r=e.layers&&typeof e.layers.getLayers==`function`?e.layers:new rd({layers:e.layers});n[cu.LAYERGROUP]=r,n[cu.TARGET]=e.target,n[cu.VIEW]=e.view instanceof Ul?e.view:new Ul;let 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l=Me(n),u=Ne(n),d=Te(n),f=we(n),p=this.transformInv_(l),m=this.transformInv_(u),h=this.transformInv_(d),g=this.transformInv_(f),_=$d+(a?Math.max(0,Math.ceil(Math.log2(Ce(n)/(a*a*256*256)))):0);if(this.addQuad_(l,u,d,f,p,m,h,g,_),this.wrapsXInSource_){let e=1/0;this.triangles_.forEach(function(t,n,r){e=Math.min(e,t.source[0][0],t.source[1][0],t.source[2][0])}),this.triangles_.forEach(t=>{if(Math.max(t.source[0][0],t.source[1][0],t.source[2][0])-e>this.sourceWorldWidth_/2){let n=[[t.source[0][0],t.source[0][1]],[t.source[1][0],t.source[1][1]],[t.source[2][0],t.source[2][1]]];n[0][0]-e>this.sourceWorldWidth_/2&&(n[0][0]-=this.sourceWorldWidth_),n[1][0]-e>this.sourceWorldWidth_/2&&(n[1][0]-=this.sourceWorldWidth_),n[2][0]-e>this.sourceWorldWidth_/2&&(n[2][0]-=this.sourceWorldWidth_);let r=Math.min(n[0][0],n[1][0],n[2][0]);Math.max(n[0][0],n[1][0],n[2][0])-r.5&&u<1,p=!1;if(c>0&&(this.targetProj_.isGlobal()&&this.targetWorldWidth_&&(p=I(ae([e,t,n,r]))/this.targetWorldWidth_>ef||p),!f&&this.sourceProj_.isGlobal()&&u&&(p=u>ef||p)),!p&&this.maxSourceExtent_&&isFinite(l[0])&&isFinite(l[1])&&isFinite(l[2])&&isFinite(l[3])&&!Pe(l,this.maxSourceExtent_))return;let m=0;if(!p&&(!isFinite(i[0])||!isFinite(i[1])||!isFinite(a[0])||!isFinite(a[1])||!isFinite(o[0])||!isFinite(o[1])||!isFinite(s[0])||!isFinite(s[1]))){if(c>0)p=!0;else if(m=(!isFinite(i[0])||!isFinite(i[1])?8:0)+(!isFinite(a[0])||!isFinite(a[1])?4:0)+(!isFinite(o[0])||!isFinite(o[1])?2:0)+ +(!isFinite(s[0])||!isFinite(s[1])),m!=1&&m!=2&&m!=4&&m!=8)return}if(c>0){if(!p){let t=[(e[0]+n[0])/2,(e[1]+n[1])/2],r=this.transformInv_(t),a;a=f?(Ke(i[0],d)+Ke(o[0],d))/2-Ke(r[0],d):(i[0]+o[0])/2-r[0];let s=(i[1]+o[1])/2-r[1];p=a*a+s*s>this.errorThresholdSquared_}if(p){if(Math.abs(e[0]-n[0])<=Math.abs(e[1]-n[1])){let 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n=0,r=0;e.canWrapX()&&(n=I(g),r=Math.floor((b[0]-g[0])/n)),ze(b.slice(),e,!0).forEach(e=>{let i=t.getTileRangeForExtentAndZ(e,this.sourceZ_);for(let e=i.minX;e<=i.maxX;e++)for(let t=i.minY;t<=i.maxY;t++){let i=r*n;this.sourceTiles_.push({getTile:()=>c(this.sourceZ_,e,t,o),offset:i})}++r}),this.sourceTiles_.length===0&&(this.state=V.EMPTY)}}getImage(){return this.canvas_}reproject_(){let e=[];if(this.sourceTiles_.forEach(t=>{let n=t.tile;if(n&&n.getState()==V.LOADED){let r=this.sourceTileGrid_.getTileCoordExtent(n.tileCoord);r[0]+=t.offset,r[2]+=t.offset;let i=this.clipExtent_?.slice();i&&(i[0]+=t.offset,i[2]+=t.offset),e.push({extent:r,clipExtent:i,image:n.getImage()})}}),this.sourceTiles_.length=0,e.length===0)this.state=V.ERROR;else{let t=this.wrappedTileCoord_[0],n=this.targetTileGrid_.getTileSize(t),r=typeof n==`number`?n:n[0],i=typeof 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i=t.getState();(i==V.LOADED||i==V.ERROR||i==V.EMPTY)&&(s(n),e--,e===0&&(this.unlistenSources_(),this.reproject_()))});this.sourcesListenerKeys_.push(n)}}),e===0?setTimeout(this.reproject_.bind(this),0):this.sourceTiles_.forEach(function({tile:e},t,n){e.getState()==V.IDLE&&e.load()})}}unlistenSources_(){this.sourcesListenerKeys_.forEach(s),this.sourcesListenerKeys_=null}release(){this.canvas_&&=(fi(this.canvas_.getContext(`2d`)),Kd.push(this.canvas_),null),this.sourceTiles_.length=0,super.release()}},af=class{constructor(e){this.highWaterMark=e===void 0?2048:e,this.count_=0,this.entries_={},this.oldest_=null,this.newest_=null}deleteOldest(){let e=this.pop();e instanceof l&&e.dispose()}canExpireCache(){return this.highWaterMark>0&&this.getCount()>this.highWaterMark}expireCache(e){for(;this.canExpireCache();)this.deleteOldest()}clear(){for(;this.oldest_;)this.deleteOldest()}containsKey(e){return this.entries_.hasOwnProperty(e)}forEach(e){let t=this.oldest_;for(;t;)e(t.value_,t.key_,this),t=t.newer}get(e,t){let n=this.entries_[e];return M(n!==void 0,`Tried to get a value for a key that does not exist in the cache`),n===this.newest_?n.value_:(n===this.oldest_?(this.oldest_=this.oldest_.newer,this.oldest_.older=null):(n.newer.older=n.older,n.older.newer=n.newer),n.newer=null,n.older=this.newest_,this.newest_.newer=n,this.newest_=n,n.value_)}remove(e){let t=this.entries_[e];return M(t!==void 0,`Tried to get a value for a key that does not exist in the cache`),t===this.newest_?(this.newest_=t.older,this.newest_&&(this.newest_.newer=null)):t===this.oldest_?(this.oldest_=t.newer,this.oldest_&&(this.oldest_.older=null)):(t.newer.older=t.older,t.older.newer=t.newer),delete this.entries_[e],--this.count_,t.value_}getCount(){return this.count_}getKeys(){let e=Array(this.count_),t=0,n;for(n=this.newest_;n;n=n.older)e[t++]=n.key_;return e}getValues(){let e=Array(this.count_),t=0,n;for(n=this.newest_;n;n=n.older)e[t++]=n.value_;return e}peekLast(){return this.oldest_.value_}peekLastKey(){return this.oldest_.key_}peekFirstKey(){return this.newest_.key_}peek(e){return this.entries_[e]?.value_}pop(){let e=this.oldest_;return delete this.entries_[e.key_],e.newer&&(e.newer.older=null),this.oldest_=e.newer,this.oldest_||(this.newest_=null),--this.count_,e.value_}replace(e,t){this.get(e),this.entries_[e].value_=t}set(e,t){M(!(e in this.entries_),`Tried to set a value for a key that is used already`);let n={key_:e,newer:null,older:this.newest_,value_:t};this.newest_?this.newest_.newer=n:this.oldest_=n,this.newest_=n,this.entries_[e]=n,++this.count_}setSize(e){this.highWaterMark=e}};function of(e,t,n,r){return r===void 0?[e,t,n]:(r[0]=e,r[1]=t,r[2]=n,r)}function sf(e,t,n){return e+`/`+t+`/`+n}function cf(e,t,n,r,i){return`${k(e)},${t},${sf(n,r,i)}`}function lf(e){return uf(e[0],e[1],e[2])}function uf(e,t,n){return(t<n||n>t.getMaxZoom())return!1;let a=t.getFullTileRange(n);return!a||a.containsXY(r,i)}function ff(e,t,n){if(!(n in e))return e[n]=new Set([t]),!0;let r=e[n],i=r.has(t);return i||r.add(t),!i}function pf(e,t,n){let r=e[n];return r?r.delete(t):!1}function mf(e,t){let n=e.layerStatesArray[e.layerIndex];n.extent&&(t=Ae(t,Nn(n.extent,e.viewState.projection)));let r=n.layer.getRenderSource();if(!r.getWrapX()){let n=r.getTileGridForProjection(e.viewState.projection).getExtent();n&&(t=Ae(t,n))}return t}var hf=class extends Qs{constructor(e,t){super(e),t||={},this.extentChanged=!0,this.renderComplete=!1,this.renderedExtent_=null,this.renderedPixelRatio,this.renderedProjection=null,this.renderedTiles=[],this.renderedSourceRevision_,this.tempExtent=P(),this.tempTileRange_=new dd(0,0,0,0),this.tempTileCoord_=of(0,0,0);let n=t.cacheSize===void 0?512:t.cacheSize;this.tileCache_=new af(n),this.sourceTileCache_=null,this.layerExtent=null,this.maxStaleKeys=n*.5}getTileCache(){return this.tileCache_}getSourceTileCache(){return this.sourceTileCache_||=new af(512),this.sourceTileCache_}getOrCreateTile(e,t,n,r){let i=this.tileCache_,a=this.getLayer().getSource(),o=cf(a,a.getKey(),e,t,n),s;if(i.containsKey(o))s=i.get(o);else{let c=r.viewState.projection,l=a.getProjection();if(s=a.getTile(e,t,n,r.pixelRatio,c,!l||Cn(l,c)?void 0:this.getSourceTileCache()),!s)return null;i.set(o,s)}return s}getTile(e,t,n,r){return this.getOrCreateTile(e,t,n,r)||null}getData(e){let t=this.frameState;if(!t)return null;let n=this.getLayer(),r=z(t.pixelToCoordinateTransform,e.slice()),i=n.getExtent();if(i&&!le(i,r))return null;let a=t.viewState,o=n.getRenderSource(),s=o.getTileGridForProjection(a.projection),c=o.getTilePixelRatio(t.pixelRatio);for(let e=s.getZForResolution(a.resolution);e>=s.getMinZoom();--e){let n=s.getTileCoordForCoordAndZ(r,e),i=this.getTile(e,n[1],n[2],t);if(!i||i.getState()!==V.LOADED)continue;let l=s.getOrigin(e),u=Ho(s.getTileSize(e)),d=s.getResolution(e),f;if(i instanceof vi||i instanceof rf)f=i.getImage();else if(i instanceof Wd){if(f=Vd(i.getData()),!f)continue}else continue;let 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u=e.wantedTiles[l],d=o.getMapInternal(),f=Math.max(n-i,c.getMinZoom(),c.getZForResolution(Math.min(o.getMaxResolution(),d?d.getView().getResolutionForZoom(Math.max(o.getMinZoom(),0)):c.getResolution(0)),s.zDirection)),p=a.rotation,m=p?ke(a.center,a.resolution,p,e.size):void 0;for(let i=n;i>=f;--i){let n=c.getTileRangeForExtentAndZ(t,i,this.tempTileRange_),a=c.getResolution(i);for(let t=n.minX;t<=n.maxX;++t)for(let o=n.minY;o<=n.maxY;++o){if(p&&!c.tileCoordIntersectsViewport([i,t,o],m))continue;let n=this.getTile(i,t,o,e);if(!n||!ff(r,n,i))continue;let s=n.getKey();if(u[s]=!0,n.getState()===V.IDLE&&!e.tileQueue.isKeyQueued(s)){let r=of(i,t,o,this.tempTileCoord_);e.tileQueue.enqueue([n,l,c.getTileCoordCenter(r),a])}}}}findStaleTile_(e,t){let n=this.tileCache_,r=e[0],i=e[1],a=e[2],o=this.getStaleKeys();for(let e=0;e0&&setTimeout(()=>{this.enqueueTiles(e,C,f-1,x,S-1)},0),!(f in x))return this.container;let w=k(this),T=e.time;for(let t of x[f]){let n=t.getState();if(n===V.EMPTY)continue;let r=t.tileCoord;if(n===V.LOADED&&t.getAlpha(w,T)===1){t.endTransition(w);continue}if(n!==V.ERROR&&(this.renderComplete=!1),this.findStaleTile_(r,x)){pf(x,t,f),e.animate=!0;continue}if(this.findAltTiles_(u,r,f+1,x))continue;let i=u.getMinZoom();for(let e=f-1;e>=i&&!this.findAltTiles_(u,r,e,x);--e);}let E=p/a*s/h,D=this.getRenderContext(e);zn(this.tempTransform,g/2,_/2,E,E,0,-g/2,-_/2),this.layerExtent&&this.clipUnrotated(D,e,this.layerExtent),l.getInterpolate()||(D.imageSmoothingEnabled=!1),this.preRender(D,e);let O=Object.keys(x).map(Number);O.sort(d);let A=[],j=[],ee=[];for(let t=O.length-1;t>=0;--t){let n=O[t],r=l.getTilePixelSize(n,s,i),a=u.getResolution(n)/p,o=r[0]*a*E,c=r[1]*a*E,d=u.getTileCoordForCoordAndZ(Me(b),n),m=u.getTileCoordExtent(d),g=z(this.tempTransform,[h*(m[0]-b[0])/p,h*(b[3]-m[3])/p]),_=h*l.getGutterForProjection(i);for(let t of x[n]){if(t.getState()!==V.LOADED)continue;let 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i,a,o,s=null,c=e[0]-1;for(this.zoomFactor_===2?(a=e[1],o=e[2]):s=this.getTileCoordExtent(e,r);c>=this.minZoom;){if(a!==void 0&&o!==void 0?(a=Math.floor(a/2),o=Math.floor(o/2),i=fd(a,a,o,o,n)):i=this.getTileRangeForExtentAndZ(s,c,n),t(c,i))return!0;--c}return!1}getExtent(){return this.extent_}getMaxZoom(){return this.maxZoom}getMinZoom(){return this.minZoom}getOrigin(e){return this.origin_?this.origin_:this.origins_[e]}getOrigins(){return this.origins_}getResolution(e){return this.resolutions_[e]}getResolutions(){return this.resolutions_}getTileCoordChildTileRange(e,t,n){if(e[0]this.maxZoom||t0?r:Math.max(a/n[0],i/n[1]);let o=t+1,s=Array(o);for(let e=0;ee?e-c:i,y=a+l>t?t-l:a,b=p[3]+v*d[0]+p[1],x=p[0]+y*d[1]+p[2],S=g-p[3],C=_-p[0];(m||u!==0)&&(Ss[0]=S,Ts[0]=S,Ss[1]=C,Cs[1]=C,Cs[0]=S+b,ws[0]=Cs[0],ws[1]=C+x,Ts[1]=ws[1]);let w;return 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n=z(this.renderedTransform_,[0,0]),r=512*this.pixelRatio;e.save(),e.translate(n[0]%r,n[1]%r),t!==1&&e.scale(t,t)}e.fill(),t&&e.restore()}setStrokeStyle_(e,t){e.strokeStyle=t[1],t[1]&&(e.lineWidth=t[2],e.lineCap=t[3],e.lineJoin=t[4],e.miterLimit=t[5],e.lineDashOffset=t[7],e.setLineDash(t[6]))}drawLabelWithPointPlacement_(e,t,n,r){let i=this.textStates[t],a=this.createLabel(e,t,r,n),o=this.strokeStates[n],s=this.pixelRatio,c=Os(Array.isArray(e)?e[0]:e,i.textAlign||`center`),l=ms[i.textBaseline||`middle`],u=o&&o.lineWidth?o.lineWidth:0;return{label:a,anchorX:c*(a.width/s-2*i.scale[0])+2*(.5-c)*u,anchorY:l*a.height/s+2*(.5-l)*u}}execute_(e,t,n,r,i,a,o,s){let c=this.zIndexContext_,l;this.pixelCoordinates_&&g(n,this.renderedTransform_)?l=this.pixelCoordinates_:(this.pixelCoordinates_||=[],l=Kn(this.coordinates,0,this.coordinates.length,2,n,this.pixelCoordinates_),Rn(this.renderedTransform_,n));let u=0,d=r.length,f=0,p,m=[],h,_,v,y,b,x,S,C,w,T,E,D,O,k=0,A=0,j=this.coordinateCache_,ee=this.viewRotation_,te=Math.round(Math.atan2(-n[1],n[0])*0xe8d4a51000)/0xe8d4a51000,ne={context:e,pixelRatio:this.pixelRatio,resolution:this.resolution,rotation:ee},M=this.instructions!=r||this.overlaps?0:200,re,ie,N,ae;for(;uM&&(this.fill_(e),k=0),A>M&&(e.stroke(),A=0),!k&&!A&&(e.beginPath(),b=NaN,x=NaN),++u;break;case U.CIRCLE:f=n[1],v=n[2]??0;let r=l[f],d=l[f+1],g=l[f+2]-v,oe=l[f+3]-v,se=g-r,ce=oe-d,le=Math.sqrt(se*se+ce*ce);e.moveTo(r+le,d),e.arc(r,d,le,0,2*Math.PI,!0),++u;break;case U.CLOSE_PATH:e.closePath(),++u;break;case U.CUSTOM:f=n[1],p=n[2];let ue=n[3],de=n[4],fe=n[5];ne.geometry=ue,ne.feature=re,u in j||(j[u]=[]);let P=j[u];fe?fe(l,f,p,2,P):(P[0]=l[f],P[1]=l[f+1],P.length=2),c&&(c.zIndex=n[6]),de(P,ne),++u;break;case U.DRAW_IMAGE:f=n[1],p=n[2],w=n[3],h=n[4],_=n[5];let pe=n[6],me=n[7],he=n[8],ge=n[9],_e=n[10],ve=n[11],ye=n[12],be=n[13];y=n[14]||`declutter`;let xe=n[15];if(!w&&n.length>=20){T=n[19],E=n[20],D=n[21],O=n[22];let e=this.drawLabelWithPointPlacement_(T,E,D,O);w=e.label,n[3]=w;let t=n[23];h=(e.anchorX-t)*this.pixelRatio,n[4]=h;let r=n[24];_=(e.anchorY-r)*this.pixelRatio,n[5]=_,pe=w.height,n[6]=pe,be=w.width,n[13]=be}let Se;n.length>25&&(Se=n[25]);let Ce,we,Te;n.length>17?(Ce=n[16],we=n[17],Te=n[18]):(Ce=wa,we=null,Te=null),_e&&te?ve+=ee:!_e&&!te&&(ve-=ee);let Ee=0;for(;f!Ns.includes(e)),Fs=!1,Is=!1;function Ls(){let e=0,t=t=>{let n=H(1,1,null,{willReadFrequently:t}),r=0,i=performance.now();for(;performance.now()-i<50;++r)n.fillStyle=`rgba(255,0,${r%256},1)`,n.fillRect(0,0,1,1),n.getImageData(0,0,1,1);return e=r>e?r:e,r};Fs={[t(!0)]:!0,[t(!1)]:!1,[t(void 0)]:void 0}[e],Is=!0}var Rs=class{constructor(e,t,n,r,i,a,o){this.maxExtent_=e,this.overlaps_=r,this.pixelRatio_=n,this.resolution_=t,this.renderBuffer_=a,this.executorsByZIndex_={},this.hitDetectionContext_=null,this.hitDetectionTransform_=Ln(),this.renderedContext_=null,this.deferredZIndexContexts_={},this.createExecutors_(i,o)}clip(e,t){let n=this.getClipCoords(t);e.beginPath(),e.moveTo(n[0],n[1]),e.lineTo(n[2],n[3]),e.lineTo(n[4],n[5]),e.lineTo(n[6],n[7]),e.clip()}createExecutors_(e,t){for(let n in e){let r=this.executorsByZIndex_[n];r===void 0&&(r={},this.executorsByZIndex_[n]=r);let i=e[n];for(let e in i){let n=i[e];r[e]=new js(this.resolution_,this.pixelRatio_,this.overlaps_,n,t)}}}hasExecutors(e){for(let t in this.executorsByZIndex_){let n=this.executorsByZIndex_[t];for(let t=0,r=e.length;t0){if(!a||n===`none`||p!==`Image`&&p!==`Text`||a.includes(e)){let n=(f[c]-3)/4,a=r-n%o,s=r-(n/o|0),l=i(e,t,a*a+s*s);if(l)return l}l.clearRect(0,0,o,o);break}}let h=Object.keys(this.executorsByZIndex_).map(Number);h.sort(d);let g,_,v,y,b;for(g=h.length-1;g>=0;--g){let e=h[g].toString();for(v=this.executorsByZIndex_[e],_=Ms.length-1;_>=0;--_)if(p=Ms[_],y=v[p],y!==void 0&&(b=y.executeHitDetection(l,s,n,m,u),b))return b}}getClipCoords(e){let t=this.maxExtent_;if(!t)return null;let n=t[0],r=t[1],i=t[2],a=t[3],o=[n,r,n,a,i,a,i,r];return Kn(o,0,8,2,e,o),o}isEmpty(){return i(this.executorsByZIndex_)}execute(e,t,n,r,i,a,o){let s=Object.keys(this.executorsByZIndex_).map(Number);s.sort(o?f:d),a||=Ms;let c=Ms.length;for(let l=0,u=s.length;lp.execute(e,t,n,r,i,o)),d&&u.restore(),a){a.offset();let e=s[l]*c+Ms.indexOf(f);this.deferredZIndexContexts_[e]||(this.deferredZIndexContexts_[e]=[]),this.deferredZIndexContexts_[e].push(a)}}}}this.renderedContext_=e}getDeferredZIndexContexts(){return this.deferredZIndexContexts_}getRenderedContext(){return this.renderedContext_}renderDeferred(){let e=this.deferredZIndexContexts_,t=Object.keys(e).map(Number).sort(d);for(let n=0,r=t.length;n{e.draw(this.renderedContext_),e.clear()}),e[t[n]].length=0}},zs={};function Bs(e){if(zs[e]!==void 0)return zs[e];let t=e*2+1,n=e*e,r=Array(n+1);for(let i=0;i<=e;++i)for(let a=0;a<=e;++a){let o=i*i+a*a;if(o>n)break;let s=r[o];s||(s=[],r[o]=s),s.push(((e+i)*t+(e+a))*4+3),i>0&&s.push(((e-i)*t+(e+a))*4+3),a>0&&(s.push(((e+i)*t+(e-a))*4+3),i>0&&s.push(((e-i)*t+(e-a))*4+3))}let i=[];for(let e=0,t=r.length;e0,"A defined and non-empty `src` or `image` must be provided"),M(e.width===void 0&&e.height===void 0||e.scale===void 0,"`width` or `height` cannot be provided together with `scale`");let s;if(e.src===void 0?a!==void 0&&(s=`complete`in a?a.complete?a.src?B.LOADED:B.IDLE:B.LOADING:B.LOADED):s=B.IDLE,this.color_=e.color===void 0?null:Ji(e.color),this.iconImage_=ta(a,o,{crossOrigin:this.crossOrigin_,referrerPolicy:this.referrerPolicy_},s,this.color_),this.offset_=e.offset===void 0?[0,0]:e.offset,this.offsetOrigin_=e.offsetOrigin===void 0?`top-left`:e.offsetOrigin,this.origin_=null,this.size_=e.size===void 0?null:e.size,this.initialOptions_,e.width!==void 0||e.height!==void 0){let t,n;if(e.size)[t,n]=e.size;else{let r=this.getImage(1);if(r.width&&r.height)t=r.width,n=r.height;else if(r instanceof HTMLImageElement){this.initialOptions_=e;let t=()=>{if(this.unlistenImageChange(t),!this.initialOptions_)return;let n=this.iconImage_.getSize();this.setScale(Vs(n[0],n[1],e.width,e.height))};this.listenImageChange(t);return}}t!==void 0&&this.setScale(Vs(t,n,e.width,e.height))}}clone(){let t,n,r;return this.initialOptions_?(n=this.initialOptions_.width,r=this.initialOptions_.height):(t=this.getScale(),t=Array.isArray(t)?t.slice():t),new e({anchor:this.anchor_.slice(),anchorOrigin:this.anchorOrigin_,anchorXUnits:this.anchorXUnits_,anchorYUnits:this.anchorYUnits_,color:this.color_&&this.color_.slice?this.color_.slice():this.color_||void 0,crossOrigin:this.crossOrigin_,referrerPolicy:this.referrerPolicy_,offset:this.offset_.slice(),offsetOrigin:this.offsetOrigin_,opacity:this.getOpacity(),rotateWithView:this.getRotateWithView(),rotation:this.getRotation(),scale:t,width:n,height:r,size:this.size_===null?void 0:this.size_.slice(),src:this.getSrc(),displacement:this.getDisplacement().slice(),declutterMode:this.getDeclutterMode()})}getAnchor(){let e=this.normalizedAnchor_;if(!e){e=this.anchor_;let t=this.getSize();if(this.anchorXUnits_==`fraction`||this.anchorYUnits_==`fraction`){if(!t)return null;e=this.anchor_.slice(),this.anchorXUnits_==`fraction`&&(e[0]*=t[0]),this.anchorYUnits_==`fraction`&&(e[1]*=t[1])}if(this.anchorOrigin_!=`top-left`){if(!t)return null;e===this.anchor_&&(e=this.anchor_.slice()),(this.anchorOrigin_==`top-right`||this.anchorOrigin_==`bottom-right`)&&(e[0]=-e[0]+t[0]),(this.anchorOrigin_==`bottom-left`||this.anchorOrigin_==`bottom-right`)&&(e[1]=-e[1]+t[1])}this.normalizedAnchor_=e}let t=this.getDisplacement(),n=this.getScaleArray();return[e[0]-t[0]/n[0],e[1]+t[1]/n[1]]}setAnchor(e){this.anchor_=e,this.normalizedAnchor_=null}getColor(){return this.color_}setColor(e){let t=e?Ji(e):null;if(this.color_===t||this.color_&&t&&this.color_.length===t.length&&this.color_.every((e,n)=>e===t[n]))return;this.color_=t;let n=this.getSrc(),r=n===void 0?this.getHitDetectionImage():null,i=n===void 0?this.iconImage_.getImageState():B.IDLE;this.iconImage_=ta(r,n,{crossOrigin:this.crossOrigin_,referrerPolicy:this.referrerPolicy_},i,this.color_)}getImage(e){return this.iconImage_.getImage(e)}getPixelRatio(e){return this.iconImage_.getPixelRatio(e)}getImageSize(){return this.iconImage_.getSize()}getImageState(){return this.iconImage_.getImageState()}getHitDetectionImage(){return this.iconImage_.getHitDetectionImage()}getOrigin(){if(this.origin_)return this.origin_;let e=this.offset_;if(this.offsetOrigin_!=`top-left`){let t=this.getSize(),n=this.iconImage_.getSize();if(!t||!n)return null;e=e.slice(),(this.offsetOrigin_==`top-right`||this.offsetOrigin_==`bottom-right`)&&(e[0]=n[0]-t[0]-e[0]),(this.offsetOrigin_==`bottom-left`||this.offsetOrigin_==`bottom-right`)&&(e[1]=n[1]-t[1]-e[1])}return this.origin_=e,this.origin_}getSrc(){return this.iconImage_.getSrc()}setSrc(e){this.iconImage_=ta(null,e,{crossOrigin:this.crossOrigin_,referrerPolicy:this.referrerPolicy_},B.IDLE,this.color_)}getSize(){return this.size_?this.size_:this.iconImage_.getSize()}getWidth(){let e=this.getScaleArray();if(this.size_)return this.size_[0]*e[0];if(this.iconImage_.getImageState()==B.LOADED)return this.iconImage_.getSize()[0]*e[0]}getHeight(){let e=this.getScaleArray();if(this.size_)return this.size_[1]*e[1];if(this.iconImage_.getImageState()==B.LOADED)return this.iconImage_.getSize()[1]*e[1]}setScale(e){delete 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this.dragging_||Math.abs(e.clientX-this.down_.clientX)>this.moveTolerance_||Math.abs(e.clientY-this.down_.clientY)>this.moveTolerance_}disposeInternal(){this.relayedListenerKey_&&=(s(this.relayedListenerKey_),null),this.element_.removeEventListener(c.TOUCHMOVE,this.boundHandleTouchMove_),this.pointerdownListenerKey_&&=(s(this.pointerdownListenerKey_),null),this.dragListenerKeys_.forEach(s),this.dragListenerKeys_.length=0,this.element_=null,super.disposeInternal()}},su={POSTRENDER:`postrender`,MOVESTART:`movestart`,MOVEEND:`moveend`,LOADSTART:`loadstart`,LOADEND:`loadend`},cu={LAYERGROUP:`layergroup`,SIZE:`size`,TARGET:`target`,VIEW:`view`},lu=1/0,uu=class{constructor(e,t){this.priorityFunction_=e,this.keyFunction_=t,this.elements_=[],this.priorities_=[],this.queuedElements_={}}clear(){this.elements_.length=0,this.priorities_.length=0,r(this.queuedElements_)}dequeue(){let e=this.elements_,t=this.priorities_,n=e[0];e.length==1?(e.length=0,t.length=0):(e[0]=e.pop(),t[0]=t.pop(),this.siftUp_(0));let r=this.keyFunction_(n);return delete this.queuedElements_[r],n}enqueue(e){M(!(this.keyFunction_(e)in this.queuedElements_),"Tried to enqueue an `element` that was already added to the queue");let t=this.priorityFunction_(e);return t!=1/0&&(this.elements_.push(e),this.priorities_.push(t),this.queuedElements_[this.keyFunction_(e)]=!0,this.siftDown_(0,this.elements_.length-1),!0)}getCount(){return this.elements_.length}getLeftChildIndex_(e){return e*2+1}getRightChildIndex_(e){return e*2+2}getParentIndex_(e){return e-1>>1}heapify_(){let e;for(e=(this.elements_.length>>1)-1;e>=0;e--)this.siftUp_(e)}isEmpty(){return this.elements_.length===0}isKeyQueued(e){return e in this.queuedElements_}isQueued(e){return this.isKeyQueued(this.keyFunction_(e))}siftUp_(e){let t=this.elements_,n=this.priorities_,r=t.length,i=t[e],a=n[e],o=e;for(;e>1;){let i=this.getLeftChildIndex_(e),a=this.getRightChildIndex_(e),o=ae;){let e=this.getParentIndex_(t);if(r[e]>a)n[t]=n[e],r[t]=r[e],t=e;else break}n[t]=i,r[t]=a}reprioritize(){let e=this.priorityFunction_,t=this.elements_,n=this.priorities_,r=0,i=t.length,a,o,s;for(o=0;oe.apply(null,t),e=>e[0].getKey()),this.boundHandleTileChange_=this.handleTileChange.bind(this),this.tileChangeCallback_=t,this.tilesLoading_=0,this.tilesLoadingKeys_={}}enqueue(e){let t=super.enqueue(e);return t&&e[0].addEventListener(c.CHANGE,this.boundHandleTileChange_),t}getTilesLoading(){return this.tilesLoading_}handleTileChange(e){let t=e.target,n=t.getState();if(n===V.LOADED||n===V.ERROR||n===V.EMPTY){n!==V.ERROR&&t.removeEventListener(c.CHANGE,this.boundHandleTileChange_);let e=t.getKey();e in this.tilesLoadingKeys_&&(delete this.tilesLoadingKeys_[e],--this.tilesLoading_),this.tileChangeCallback_()}}loadMoreTiles(e,t){let n=0;for(;this.tilesLoading_0;){let e=this.dequeue()[0],t=e.getKey();e.getState()===V.IDLE&&!(t in this.tilesLoadingKeys_)&&(this.tilesLoadingKeys_[t]=!0,++this.tilesLoading_,++n,e.load())}}};function fu(e,t,n,r,i){if(!e||!(n in e.wantedTiles)||!e.wantedTiles[n][t.getKey()])return lu;let a=e.viewState.center,o=r[0]-a[0],s=r[1]-a[1];return 65536*Math.log(i)+Math.sqrt(o*o+s*s)/i}var pu=class extends j{constructor(e){super();let t=e.element;t&&!e.target&&!t.style.pointerEvents&&(t.style.pointerEvents=`auto`),this.element=t||null,this.target_=null,this.map_=null,this.listenerKeys=[],e.render&&(this.render=e.render),e.target&&this.setTarget(e.target)}disposeInternal(){this.element?.remove(),super.disposeInternal()}getMap(){return this.map_}setMap(e){this.map_&&this.element?.remove();for(let e=0,t=this.listenerKeys.length;et.getAttributions(e)));if(this.attributions_!==void 0&&(Array.isArray(this.attributions_)?this.attributions_.forEach(e=>n.add(e)):n.add(this.attributions_)),!this.overrideCollapsible_){let e=!t.some(e=>e.getSource()?.getAttributionsCollapsible()===!1);this.setCollapsible(e)}return Array.from(n)}async updateElement_(e){if(!e){this.renderedVisible_&&=(this.element.style.display=`none`,!1);return}let t=await Promise.all(this.collectSourceAttributions_(e).map(e=>S(()=>e))),n=t.length>0;if(this.renderedVisible_!=n&&(this.element.style.display=n?``:`none`,this.renderedVisible_=n),!g(t,this.renderedAttributions_)){mi(this.ulElement_);for(let e=0,n=t.length;e0&&t%(2*Math.PI)!=0?e.animate({rotation:0,duration:this.duration_,easing:oi}):e.setRotation(0))}render(e){let t=e.frameState;if(!t)return;let n=t.viewState.rotation;if(n!=this.rotation_){let e=`rotate(`+n+`rad)`;if(this.autoHide_){let e=this.element.classList.contains(ca);!e&&n===0?this.element.classList.add(ca):e&&n!==0&&this.element.classList.remove(ca)}this.label_.style.transform=e}this.rotation_=n}},gu=class extends pu{constructor(e){e||={},super({element:document.createElement(`div`),target:e.target});let t=e.className===void 0?`ol-zoom`:e.className,n=e.delta===void 0?1:e.delta,r=e.zoomInClassName===void 0?t+`-in`:e.zoomInClassName,i=e.zoomOutClassName===void 0?t+`-out`:e.zoomOutClassName,a=e.zoomInLabel===void 0?`+`:e.zoomInLabel,o=e.zoomOutLabel===void 0?`–`:e.zoomOutLabel,s=e.zoomInTipLabel===void 0?`Zoom in`:e.zoomInTipLabel,l=e.zoomOutTipLabel===void 0?`Zoom out`:e.zoomOutTipLabel,u=document.createElement(`button`);u.className=r,u.setAttribute(`type`,`button`),u.title=s,u.appendChild(typeof a==`string`?document.createTextNode(a):a),u.addEventListener(c.CLICK,this.handleClick_.bind(this,n),!1);let d=document.createElement(`button`);d.className=i,d.setAttribute(`type`,`button`),d.title=l,d.appendChild(typeof o==`string`?document.createTextNode(o):o),d.addEventListener(c.CLICK,this.handleClick_.bind(this,-n),!1);let f=t+` `+la+` `+ua,p=this.element;p.className=f,p.appendChild(u),p.appendChild(d),this.duration_=e.duration===void 0?250:e.duration}handleClick_(e,t){t.preventDefault(),this.zoomByDelta_(e)}zoomByDelta_(e){let t=this.getMap().getView();if(!t)return;let n=t.getZoom();if(n!==void 0){let r=t.getConstrainedZoom(n+e);this.duration_>0?(t.getAnimating()&&t.cancelAnimations(),t.animate({zoom:r,duration:this.duration_,easing:oi})):t.setZoom(r)}}};function _u(e){e||={};let t=new ne;return(e.zoom===void 0||e.zoom)&&t.push(new gu(e.zoomOptions)),(e.rotate===void 0||e.rotate)&&t.push(new hu(e.rotateOptions)),(e.attribution===void 0||e.attribution)&&t.push(new mu(e.attributionOptions)),t}var vu={ACTIVE:`active`},yu=class extends j{constructor(e){super(),this.on,this.once,this.un,e&&e.handleEvent&&(this.handleEvent=e.handleEvent),this.map_=null,this.setActive(!0)}getActive(){return this.get(vu.ACTIVE)}getMap(){return this.map_}handleEvent(e){return!0}setActive(e){this.set(vu.ACTIVE,e)}setMap(e){this.map_=e}};function bu(e,t,n){let r=e.getCenterInternal();if(r){let i=[r[0]+t[0],r[1]+t[1]];e.animateInternal({duration:n===void 0?250:n,easing:ci,center:e.getConstrainedCenter(i)})}}function xu(e,t,n,r){let i=e.getZoom();if(i===void 0)return;let a=e.getConstrainedZoom(i+t),o=e.getResolutionForZoom(a);e.getAnimating()&&e.cancelAnimations(),e.animate({resolution:o,anchor:n,duration:r===void 0?250:r,easing:oi})}var Su=class extends yu{constructor(e){super(),e||={},this.delta_=e.delta?e.delta:1,this.duration_=e.duration===void 0?250:e.duration}handleEvent(e){let t=!1;if(e.type==$.DBLCLICK){let n=e.originalEvent,r=e.map,i=e.coordinate,a=n.shiftKey?-this.delta_:this.delta_;xu(r.getView(),a,i,this.duration_),n.preventDefault(),t=!0}return!t}};function Cu(e){let t=arguments;return function(e){let n=!0;for(let r=0,i=t.length;r0}}else if(e.type==$.POINTERDOWN){let n=this.handleDownEvent(e);this.handlingDownUpSequence=n,t=this.stopDown(n)}else e.type==$.POINTERMOVE&&this.handleMoveEvent(e);return!t}handleMoveEvent(e){}handleUpEvent(e){return!1}stopDown(e){return e}updateTrackedPointers_(e){e.activePointers&&(this.targetPointers=e.activePointers)}};function Iu(e){let t=e.length,n=0,r=0;for(let i=0;i0&&this.condition_(e)){let t=e.map.getView();return this.lastCentroid=null,t.getAnimating()&&t.cancelAnimations(),this.kinetic_&&this.kinetic_.begin(),this.noKinetic_=this.targetPointers.length>1,!0}return!1}},Ru=class extends Fu{constructor(e){e||={},super({stopDown:y}),this.condition_=e.condition?e.condition:wu,this.lastAngle_=void 0,this.duration_=e.duration===void 0?250:e.duration}handleDragEvent(e){if(!Nu(e))return;let t=e.map,n=t.getView();if(n.getConstraints().rotation===Rl)return;let r=t.getSize(),i=e.pixel,a=Math.atan2(r[1]/2-i[1],i[0]-r[0]/2);if(this.lastAngle_!==void 0){let e=a-this.lastAngle_;n.adjustRotationInternal(-e)}this.lastAngle_=a}handleUpEvent(e){return!Nu(e)||(e.map.getView().endInteraction(this.duration_),!1)}handleDownEvent(e){return Nu(e)&&Ou(e)&&this.condition_(e)?(e.map.getView().beginInteraction(),this.lastAngle_=void 0,!0):!1}},zu=class extends l{constructor(e){super(),this.geometry_=null,this.element_=document.createElement(`div`),this.element_.style.position=`absolute`,this.element_.style.pointerEvents=`auto`,this.element_.className=`ol-box `+e,this.map_=null,this.startPixel_=null,this.endPixel_=null}disposeInternal(){this.setMap(null)}render_(){let e=this.startPixel_,t=this.endPixel_,n=this.element_.style;n.left=Math.min(e[0],t[0])+`px`,n.top=Math.min(e[1],t[1])+`px`,n.width=Math.abs(t[0]-e[0])+`px`,n.height=Math.abs(t[1]-e[1])+`px`}setMap(e){if(this.map_){this.map_.getOverlayContainer().removeChild(this.element_);let e=this.element_.style;e.left=`inherit`,e.top=`inherit`,e.width=`inherit`,e.height=`inherit`}this.map_=e,this.map_&&this.map_.getOverlayContainer().appendChild(this.element_)}setPixels(e,t){this.startPixel_=e,this.endPixel_=t,this.createOrUpdateGeometry(),this.render_()}createOrUpdateGeometry(){if(!this.map_)return;let e=this.startPixel_,t=this.endPixel_,n=[e,[e[0],t[1]],t,[t[0],e[1]]].map(this.map_.getCoordinateFromPixelInternal,this.map_);n[4]=n[0].slice(),this.geometry_?this.geometry_.setCoordinates([n]):this.geometry_=new qr([n])}getGeometry(){return this.geometry_}},Bu={BOXSTART:`boxstart`,BOXDRAG:`boxdrag`,BOXEND:`boxend`,BOXCANCEL:`boxcancel`},Vu=class extends C{constructor(e,t,n){super(e),this.coordinate=t,this.mapBrowserEvent=n}},Hu=class extends Fu{constructor(e){super(),this.on,this.once,this.un,e??={},this.box_=new zu(e.className||`ol-dragbox`),this.minArea_=e.minArea??64,e.onBoxEnd&&(this.onBoxEnd=e.onBoxEnd),this.startPixel_=null,this.condition_=e.condition??Ou,this.boxEndCondition_=e.boxEndCondition??this.defaultBoxEndCondition}defaultBoxEndCondition(e,t,n){let r=n[0]-t[0],i=n[1]-t[1];return r*r+i*i>=this.minArea_}getGeometry(){return this.box_.getGeometry()}handleDragEvent(e){this.startPixel_&&(this.box_.setPixels(this.startPixel_,e.pixel),this.dispatchEvent(new Vu(Bu.BOXDRAG,e.coordinate,e)))}handleUpEvent(e){if(!this.startPixel_)return!1;let t=this.boxEndCondition_(e,this.startPixel_,e.pixel);return t&&this.onBoxEnd(e),this.dispatchEvent(new Vu(t?Bu.BOXEND:Bu.BOXCANCEL,e.coordinate,e)),this.box_.setMap(null),this.startPixel_=null,!1}handleDownEvent(e){return this.condition_(e)?(this.startPixel_=e.pixel,this.box_.setMap(e.map),this.box_.setPixels(this.startPixel_,this.startPixel_),this.dispatchEvent(new Vu(Bu.BOXSTART,e.coordinate,e)),!0):!1}onBoxEnd(e){}setActive(e){e||(this.box_.setMap(null),this.startPixel_&&=(this.dispatchEvent(new Vu(Bu.BOXCANCEL,this.startPixel_,null)),null)),super.setActive(e)}setMap(e){this.getMap()&&(this.box_.setMap(null),this.startPixel_&&=(this.dispatchEvent(new Vu(Bu.BOXCANCEL,this.startPixel_,null)),null)),super.setMap(e)}},Uu=class extends Hu{constructor(e){e||={};let t=e.condition?e.condition:ju;super({condition:t,className:e.className||`ol-dragzoom`,minArea:e.minArea}),this.duration_=e.duration===void 0?200:e.duration,this.out_=e.out!==void 0&&e.out}onBoxEnd(e){let t=this.getMap().getView(),n=this.getGeometry();if(this.out_){let e=t.rotatedExtentForGeometry(n),r=t.getResolutionForExtentInternal(e),i=t.getResolution()/r;n=n.clone(),n.scale(i*i)}t.fitInternal(n,{duration:this.duration_,easing:oi})}},Wu={LEFT:`ArrowLeft`,UP:`ArrowUp`,RIGHT:`ArrowRight`,DOWN:`ArrowDown`},Gu=class extends yu{constructor(e){super(),e||={},this.defaultCondition_=function(e){return ku(e)&&Mu(e)},this.condition_=e.condition===void 0?this.defaultCondition_:e.condition,this.duration_=e.duration===void 0?100:e.duration,this.pixelDelta_=e.pixelDelta===void 0?128:e.pixelDelta}handleEvent(e){let t=!1;if(e.type==c.KEYDOWN){let n=e.originalEvent,r=n.key;if(this.condition_(e)&&(r==Wu.DOWN||r==Wu.LEFT||r==Wu.RIGHT||r==Wu.UP)){let i=e.map.getView(),a=i.getResolution()*this.pixelDelta_,o=0,s=0;r==Wu.DOWN?s=-a:r==Wu.LEFT?o=-a:r==Wu.RIGHT?o=a:s=a;let c=[o,s];it(c,i.getRotation()),bu(i,c,this.duration_),n.preventDefault(),t=!0}}return!t}},Ku=class extends yu{constructor(e){super(),e||={},this.condition_=e.condition?e.condition:function(e){return!Au(e)&&Mu(e)},this.delta_=e.delta?e.delta:1,this.duration_=e.duration===void 0?100:e.duration}handleEvent(e){let t=!1;if(e.type==c.KEYDOWN||e.type==c.KEYPRESS){let n=e.originalEvent,r=n.key;if(this.condition_(e)&&(r===`+`||r===`-`)){let i=e.map,a=r===`+`?this.delta_:-this.delta_;xu(i.getView(),a,void 0,this.duration_),n.preventDefault(),t=!0}}return!t}},qu=40,Ju=300,Yu=3,Xu=class extends yu{constructor(e){e||={},super(e),this.totalDelta_=0,this.lastDelta_=0,this.maxDelta_=e.maxDelta===void 0?1:e.maxDelta,this.duration_=e.duration===void 0?250:e.duration,this.timeout_=e.timeout===void 0?80:e.timeout,this.useAnchor_=e.useAnchor===void 0||e.useAnchor,this.constrainResolution_=e.constrainResolution!==void 0&&e.constrainResolution;let t=e.condition?e.condition:Du;this.condition_=e.onFocusOnly?Cu(Eu,t):t,this.lastAnchor_=null,this.startTime_=void 0,this.timeoutId_,this.mode_=void 0,this.trackpadEventGap_=400,this.trackpadTimeoutId_,this.deltaPerZoom_=300,this.ctrlKeyPressed_=!1,this.ctrlKeyListenerKeys_=[]}setMap(e){if(this.ctrlKeyListenerKeys_.forEach(s),this.ctrlKeyListenerKeys_.length=0,this.ctrlKeyPressed_=!1,super.setMap(e),e){let t=e.getOwnerDocument();this.ctrlKeyListenerKeys_.push(a(t,`keydown`,e=>{e.key===`Control`&&(this.ctrlKeyPressed_=!0)}),a(t,`keyup`,e=>{e.key===`Control`&&(this.ctrlKeyPressed_=!1)}))}}endInteraction_(){this.trackpadTimeoutId_=void 0;let e=this.getMap();if(!e)return;let t=e.getView(),n=this.lastDelta_?this.lastDelta_>0?1:-1:0;t.endInteraction(this.constrainResolution_||t.getConstrainResolution()?100:void 0,n,this.lastAnchor_?e.getCoordinateFromPixel(this.lastAnchor_):null)}handleEvent(e){if(!this.condition_(e)||e.type!==c.WHEEL)return!0;let t=e.map,n=e.originalEvent;n.preventDefault();let r=n.ctrlKey&&!this.ctrlKeyPressed_;n.ctrlKey||(this.ctrlKeyPressed_=!1),this.useAnchor_&&(this.lastAnchor_=e.pixel);let i=n.deltaY;switch(n.deltaMode){case WheelEvent.DOM_DELTA_LINE:i*=qu;break;case WheelEvent.DOM_DELTA_PAGE:i*=Ju}if(i===0)return!1;this.lastDelta_=i;let a=Date.now();this.startTime_===void 0&&(this.startTime_=a),(!this.mode_||a-this.startTime_>this.trackpadEventGap_)&&(this.mode_=Math.abs(i)<4?`trackpad`:`wheel`);let o=t.getView();if(this.mode_===`trackpad`)return this.trackpadTimeoutId_?clearTimeout(this.trackpadTimeoutId_):(o.getAnimating()&&o.cancelAnimations(),o.beginInteraction()),this.trackpadTimeoutId_=setTimeout(this.endInteraction_.bind(this),this.timeout_),r&&(i*=Yu),o.adjustZoom(-i/this.deltaPerZoom_,this.lastAnchor_?t.getCoordinateFromPixel(this.lastAnchor_):null),this.startTime_=a,!1;this.totalDelta_+=i;let s=Math.max(this.timeout_-(a-this.startTime_),0);return clearTimeout(this.timeoutId_),this.timeoutId_=setTimeout(this.handleWheelZoom_.bind(this,t),s),!1}handleWheelZoom_(e){let t=e.getView();t.getAnimating()&&t.cancelAnimations();let n=-L(this.totalDelta_,-this.maxDelta_*this.deltaPerZoom_,this.maxDelta_*this.deltaPerZoom_)/this.deltaPerZoom_;(t.getConstrainResolution()||this.constrainResolution_)&&(n=n?n>0?1:-1:0),xu(t,n,this.lastAnchor_?e.getCoordinateFromPixel(this.lastAnchor_):null,this.duration_),this.mode_=void 0,this.totalDelta_=0,this.lastAnchor_=null,this.startTime_=void 0,this.timeoutId_=void 0}setMouseAnchor(e){this.useAnchor_=e,e||(this.lastAnchor_=null)}},Zu=class extends Fu{constructor(e){e||={};let t=e;t.stopDown||=y,super(t),this.anchor_=null,this.lastAngle_=void 0,this.rotating_=!1,this.rotationDelta_=0,this.threshold_=e.threshold===void 0?.3:e.threshold,this.duration_=e.duration===void 0?250:e.duration}handleDragEvent(e){let t=0,n=this.targetPointers[0],r=this.targetPointers[1],i=Math.atan2(r.clientY-n.clientY,r.clientX-n.clientX);if(this.lastAngle_!==void 0){let e=i-this.lastAngle_;this.rotationDelta_+=e,!this.rotating_&&Math.abs(this.rotationDelta_)>this.threshold_&&(this.rotating_=!0),t=e}this.lastAngle_=i;let a=e.map,o=a.getView();o.getConstraints().rotation!==Rl&&(this.anchor_=a.getCoordinateFromPixelInternal(a.getEventPixel(Iu(this.targetPointers))),this.rotating_&&(a.render(),o.adjustRotationInternal(t,this.anchor_)))}handleUpEvent(e){return this.targetPointers.length<2?(e.map.getView().endInteraction(this.duration_),!1):!0}handleDownEvent(e){if(this.targetPointers.length>=2){let t=e.map;return this.anchor_=null,this.lastAngle_=void 0,this.rotating_=!1,this.rotationDelta_=0,this.handlingDownUpSequence||t.getView().beginInteraction(),!0}return!1}},Qu=class extends Fu{constructor(e){e||={};let t=e;t.stopDown||=y,super(t),this.anchor_=null,this.duration_=e.duration===void 0?400:e.duration,this.lastDistance_=void 0,this.lastScaleDelta_=1}handleDragEvent(e){let t=1,n=this.targetPointers[0],r=this.targetPointers[1],i=n.clientX-r.clientX,a=n.clientY-r.clientY,o=Math.sqrt(i*i+a*a);this.lastDistance_!==void 0&&(t=this.lastDistance_/o),this.lastDistance_=o;let s=e.map,c=s.getView();t!=1&&(this.lastScaleDelta_=t),this.anchor_=s.getCoordinateFromPixelInternal(s.getEventPixel(Iu(this.targetPointers))),s.render(),c.adjustResolutionInternal(t,this.anchor_)}handleUpEvent(e){if(this.targetPointers.length<2){let t=e.map.getView(),n=this.lastScaleDelta_>1?1:-1;return t.endInteraction(this.duration_,n),!1}return!0}handleDownEvent(e){if(this.targetPointers.length>=2){let t=e.map;return this.anchor_=null,this.lastDistance_=void 0,this.lastScaleDelta_=1,this.handlingDownUpSequence||t.getView().beginInteraction(),!0}return!1}};function $u(e){e||={};let t=new ne,n=new bi(-.005,.05,100);return(e.altShiftDragRotate===void 0||e.altShiftDragRotate)&&t.push(new Ru),(e.doubleClickZoom===void 0||e.doubleClickZoom)&&t.push(new Su({delta:e.zoomDelta,duration:e.zoomDuration})),(e.dragPan===void 0||e.dragPan)&&t.push(new Lu({onFocusOnly:e.onFocusOnly,kinetic:n})),(e.pinchRotate===void 0||e.pinchRotate)&&t.push(new Zu),(e.pinchZoom===void 0||e.pinchZoom)&&t.push(new Qu({duration:e.zoomDuration})),(e.keyboard===void 0||e.keyboard)&&(t.push(new Gu),t.push(new Ku({delta:e.zoomDelta,duration:e.zoomDuration}))),(e.mouseWheelZoom===void 0||e.mouseWheelZoom)&&t.push(new Xu({onFocusOnly:e.onFocusOnly,duration:e.zoomDuration})),(e.shiftDragZoom===void 0||e.shiftDragZoom)&&t.push(new Uu({duration:e.zoomDuration})),t}var ed={ADDLAYER:`addlayer`,REMOVELAYER:`removelayer`},td=class extends C{constructor(e,t){super(e),this.layer=t}},nd={LAYERS:`layers`},rd=class e extends Xl{constructor(e){e||={};let t=Object.assign({},e);delete t.layers;let n=e.layers;super(t),this.on,this.once,this.un,this.layersListenerKeys_=[],this.listenerKeys_={},this.addChangeListener(nd.LAYERS,this.handleLayersChanged_),n?Array.isArray(n)?n=new ne(n.slice(),{unique:!0}):M(typeof n.getArray==`function`,"Expected `layers` to be an array or a `Collection`"):n=new ne(void 0,{unique:!0}),this.setLayers(n)}handleLayerChange_(){this.changed()}handleLayersChanged_(){this.layersListenerKeys_.forEach(s),this.layersListenerKeys_.length=0;let e=this.getLayers();this.layersListenerKeys_.push(a(e,t.ADD,this.handleLayersAdd_,this),a(e,t.REMOVE,this.handleLayersRemove_,this));for(let e in this.listenerKeys_)this.listenerKeys_[e].forEach(s);r(this.listenerKeys_);let n=e.getArray();for(let e=0,t=n.length;e=0;--i){let a=m[i],d=a.layer;if(d.hasRenderer()&&Ql(a,l)&&o.call(s,d)){let i=d.getRenderer(),o=d.getSource();if(i&&o){let s=o.getWrapX()?f:e,l=u.bind(null,a.managed);_[0]=s[0]+p[r][0],_[1]=s[1]+p[r][1],c=i.forEachFeatureAtCoordinate(_,t,n,l,g)}if(c)return c}}if(g.length===0)return;let v=1/g.length;return g.forEach((e,t)=>e.distanceSq+=t*v),g.sort((e,t)=>e.distanceSq-t.distanceSq),g.some(e=>c=e.callback(e.feature,e.layer,e.geometry)),c}hasFeatureAtCoordinate(e,t,n,r,i,a){return this.forEachFeatureAtCoordinate(e,t,n,r,v,this,i,a)!==void 0}getMap(){return this.map_}renderFrame(e){D()}scheduleExpireIconCache(e){Qi.canExpireCache()&&e.postRenderFunctions.push(ad)}};function ad(e,t){Qi.expire()}var od=class extends id{constructor(e){super(e),this.fontChangeListenerKey_=a(Ta,n.PROPERTYCHANGE,e.redrawText,e),this.element_=$r?gi():document.createElement(`div`);let t=this.element_.style;t.position=`absolute`,t.width=`100%`,t.height=`100%`,t.zIndex=`0`,this.element_.className=la+` ol-layers`;let r=e.getViewport();r&&r.insertBefore(this.element_,r.firstChild||null),this.children_=[],this.renderedVisible_=!0}dispatchRenderEvent(e,t){let n=this.getMap();if(n.hasListener(e)){let r=new Ks(e,void 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e=parseFloat(t.style.width)/t.width,n=parseFloat(t.style.height)/t.height;i.transform(e,0,0,n,0,0)}i.drawImage(t,0,0),i.restore()}this.dispatchRenderEvent(no.POSTCOMPOSE,e),this.renderedVisible_||=(this.element_.style.display=``,!0),this.scheduleExpireIconCache(e)}declutter(e,t){if(e.declutter){for(let n=t.length-1;n>=0;--n){let r=t[n],i=r.layer;i.getDeclutter()&&i.renderDeclutter(e,r)}t.forEach(t=>t.layer.renderDeferred(e))}}};function sd(e){if(e instanceof Zl){e.setMapInternal(null);return}e instanceof rd&&e.getLayers().forEach(sd)}function cd(e,t){if(e instanceof Zl){e.setMapInternal(t);return}if(e instanceof rd){let n=e.getLayers().getArray();for(let e=0,r=n.length;ethis.updateSize())),this.controls=n.controls||($r?new ne:_u()),this.interactions=n.interactions||($r?new ne:$u({onFocusOnly:!0})),this.overlays_=n.overlays,this.overlayIdIndex_={},this.renderer_=null,this.postRenderFunctions_=[],this.tileQueue_=new du(this.getTilePriority.bind(this),this.handleTileChange_.bind(this)),this.addChangeListener(cu.LAYERGROUP,this.handleLayerGroupChanged_),this.addChangeListener(cu.VIEW,this.handleViewChanged_),this.addChangeListener(cu.SIZE,this.handleSizeChanged_),this.addChangeListener(cu.TARGET,this.handleTargetChanged_),this.setProperties(n.values);let r=this;e.view&&!(e.view instanceof Ul)&&e.view.then(function(e){r.setView(new Ul(e))}),this.controls.addEventListener(t.ADD,e=>{e.element.setMap(this)}),this.controls.addEventListener(t.REMOVE,e=>{e.element.setMap(null)}),this.interactions.addEventListener(t.ADD,e=>{e.element.setMap(this)}),this.interactions.addEventListener(t.REMOVE,e=>{e.element.setMap(null)}),this.overlays_.addEventListener(t.ADD,e=>{this.addOverlayInternal_(e.element)}),this.overlays_.addEventListener(t.REMOVE,e=>{let t=e.element.getId();t!==void 0&&delete this.overlayIdIndex_[t.toString()],e.element.setMap(null)}),this.controls.forEach(e=>{e.setMap(this)}),this.interactions.forEach(e=>{e.setMap(this)}),this.overlays_.forEach(this.addOverlayInternal_.bind(this))}addControl(e){this.getControls().push(e)}addInteraction(e){this.getInteractions().push(e)}addLayer(e){this.getLayerGroup().getLayers().push(e)}handleLayerAdd_(e){cd(e.layer,this)}addOverlay(e){this.getOverlays().push(e)}addOverlayInternal_(e){let t=e.getId();t!==void 0&&(this.overlayIdIndex_[t.toString()]=e),e.setMap(this)}disposeInternal(){this.controls.clear(),this.interactions.clear(),this.overlays_.clear(),this.resizeObserver_?.disconnect(),this.setTarget(null),super.disposeInternal()}forEachFeatureAtPixel(e,t,n){if(!this.frameState_||!this.renderer_)return;let r=this.getCoordinateFromPixelInternal(e);n=n===void 0?{}:n;let i=n.hitTolerance===void 0?0:n.hitTolerance,a=n.layerFilter===void 0?v:n.layerFilter,o=n.checkWrapped!==!1;return this.renderer_.forEachFeatureAtCoordinate(r,this.frameState_,i,o,t,null,a,null)}getFeaturesAtPixel(e,t){let n=[];return this.forEachFeatureAtPixel(e,function(e){n.push(e)},t),n}getAllLayers(){let e=[];function t(n){n.forEach(function(n){n instanceof rd?t(n.getLayers()):e.push(n)})}return t(this.getLayers()),e}hasFeatureAtPixel(e,t){if(!this.frameState_||!this.renderer_)return!1;let n=this.getCoordinateFromPixelInternal(e);t=t===void 0?{}:t;let r=t.layerFilter===void 0?v:t.layerFilter,i=t.hitTolerance===void 0?0:t.hitTolerance,a=t.checkWrapped!==!1;return this.renderer_.hasFeatureAtCoordinate(n,this.frameState_,i,a,r,null)}getEventCoordinate(e){return this.getCoordinateFromPixel(this.getEventPixel(e))}getEventCoordinateInternal(e){return this.getCoordinateFromPixelInternal(this.getEventPixel(e))}getEventPixel(e){let t=this.viewport_.getBoundingClientRect(),n=this.getSize(),r=t.width/n[0],i=t.height/n[1],a=`changedTouches`in e?e.changedTouches[0]:e;return[(a.clientX-t.left)/r,(a.clientY-t.top)/i]}getTarget(){return this.get(cu.TARGET)}getTargetElement(){return this.targetElement_}getCoordinateFromPixel(e){return An(this.getCoordinateFromPixelInternal(e),this.getView().getProjection())}getCoordinateFromPixelInternal(e){let t=this.frameState_;return t?z(t.pixelToCoordinateTransform,e.slice()):null}getControls(){return this.controls}getOverlays(){return this.overlays_}getOverlayById(e){let t=this.overlayIdIndex_[e.toString()];return t===void 0?null:t}getInteractions(){return this.interactions}getLayerGroup(){return this.get(cu.LAYERGROUP)}setLayers(e){let t=this.getLayerGroup();if(e instanceof ne){t.setLayers(e);return}let n=t.getLayers();n.clear(),n.extend(e)}getLayers(){return this.getLayerGroup().getLayers()}getLoadingOrNotReady(){let e=this.getLayerGroup().getLayerStatesArray();for(let t=0,n=e.length;t=0;n--){let r=t[n];if(r.getMap()===this&&r.getActive()&&this.getTargetElement()&&(!r.handleEvent(e)||e.propagationStopped))break}}}handlePostRender(){let e=this.frameState_,t=this.tileQueue_;if(!t.isEmpty()){let n=this.maxTilesLoading_,r=n,i=e?e.viewHints:void 0,a=i?i[$o.ANIMATING]||i[$o.INTERACTING]:!1;if(a){let t=Date.now()-e.time>8;n=t?0:8,r=t?0:2}t.getTilesLoading(){this.postRenderTimeoutHandle_=void 0,this.handlePostRender()},0)}setLayerGroup(e){let t=this.getLayerGroup();t&&this.handleLayerRemove_(new td(`removelayer`,t)),this.set(cu.LAYERGROUP,e)}setSize(e){this.set(cu.SIZE,e)}setTarget(e){this.set(cu.TARGET,e)}setView(e){if(!e||e instanceof Ul){this.set(cu.VIEW,e);return}this.set(cu.VIEW,new Ul);let t=this;e.then(function(e){t.setView(new Ul(e))})}updateSize(){let e=this.getTargetElement(),t;if(e){let n,r;if(_i(e)){let t=e.getContext(`2d`).getTransform();n=e.width/t.a,r=e.height/t.d}else{let t=getComputedStyle(e);n=e.offsetWidth-parseFloat(t.borderLeftWidth)-parseFloat(t.paddingLeft)-parseFloat(t.paddingRight)-parseFloat(t.borderRightWidth),r=e.offsetHeight-parseFloat(t.borderTopWidth)-parseFloat(t.paddingTop)-parseFloat(t.paddingBottom)-parseFloat(t.borderBottomWidth)}!isNaN(n)&&!isNaN(r)&&(t=[Math.max(0,n),Math.max(0,r)],!Bo(t)&&(e.offsetWidth||e.offsetHeight||e.getClientRects().length)&&tt(`No map visible because the map container's width or height are 0.`))}let n=this.getSize();t&&(!n||!g(t,n))&&(this.updateViewportSize_(t),this.setSize(t))}updateViewportSize_(e){let t=this.getView();t&&t.setViewportSize(e)}};function ud(e){let t=null;e.keyboardEventTarget!==void 0&&(t=typeof e.keyboardEventTarget==`string`?document.getElementById(e.keyboardEventTarget):e.keyboardEventTarget);let n={},r=e.layers&&typeof e.layers.getLayers==`function`?e.layers:new rd({layers:e.layers});n[cu.LAYERGROUP]=r,n[cu.TARGET]=e.target,n[cu.VIEW]=e.view instanceof Ul?e.view:new Ul;let i;e.controls!==void 0&&(Array.isArray(e.controls)?i=new ne(e.controls.slice()):(M(typeof e.controls.getArray==`function`,"Expected `controls` to be an array or an `ol/Collection.js`"),i=e.controls));let a;e.interactions!==void 0&&(Array.isArray(e.interactions)?a=new ne(e.interactions.slice()):(M(typeof e.interactions.getArray==`function`,"Expected `interactions` to be an array or an `ol/Collection.js`"),a=e.interactions));let o;return e.overlays===void 0?o=new ne:Array.isArray(e.overlays)?o=new ne(e.overlays.slice()):(M(typeof e.overlays.getArray==`function`,"Expected `overlays` to be an array or an `ol/Collection.js`"),o=e.overlays),{controls:i,interactions:a,keyboardEventTarget:t,overlays:o,values:n}}var dd=class{constructor(e,t,n,r){this.minX=e,this.maxX=t,this.minY=n,this.maxY=r}contains(e){return this.containsXY(e[1],e[2])}containsTileRange(e){return this.minX<=e.minX&&e.maxX<=this.maxX&&this.minY<=e.minY&&e.maxY<=this.maxY}containsXY(e,t){return 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r=e.target,i=(r[0][0]-b[0])/a,o=-(r[0][1]-b[1])/a,s=(r[1][0]-b[0])/a,c=-(r[1][1]-b[1])/a,l=(r[2][0]-b[0])/a,u=-(r[2][1]-b[1])/a;m.beginPath(),m.moveTo(s,c),m.lineTo(i,o),m.lineTo(l,u),m.closePath(),m.stroke()}),m.restore()),m.canvas}var $d=10,ef=.25,tf=class{constructor(e,t,n,r,i,a,o){this.sourceProj_=e,this.targetProj_=t;let s={},c=o?xn(e=>z(o,Dn(e,this.targetProj_,this.sourceProj_))):En(this.targetProj_,this.sourceProj_);this.transformInv_=function(e){let t=e[0]+`/`+e[1];return s[t]||(s[t]=c(e)),s[t]},this.maxSourceExtent_=r,this.errorThresholdSquared_=i*i,this.triangles_=[],this.wrapsXInSource_=!1,this.canWrapXInSource_=this.sourceProj_.canWrapX()&&!!r&&!!this.sourceProj_.getExtent()&&I(r)>=I(this.sourceProj_.getExtent()),this.sourceWorldWidth_=this.sourceProj_.getExtent()?I(this.sourceProj_.getExtent()):null,this.targetWorldWidth_=this.targetProj_.getExtent()?I(this.targetProj_.getExtent()):null;let l=Me(n),u=Ne(n),d=Te(n),f=we(n),p=this.transformInv_(l),m=this.transformInv_(u),h=this.transformInv_(d),g=this.transformInv_(f),_=$d+(a?Math.max(0,Math.ceil(Math.log2(Ce(n)/(a*a*256*256)))):0);if(this.addQuad_(l,u,d,f,p,m,h,g,_),this.wrapsXInSource_){let e=1/0;this.triangles_.forEach(function(t,n,r){e=Math.min(e,t.source[0][0],t.source[1][0],t.source[2][0])}),this.triangles_.forEach(t=>{if(Math.max(t.source[0][0],t.source[1][0],t.source[2][0])-e>this.sourceWorldWidth_/2){let n=[[t.source[0][0],t.source[0][1]],[t.source[1][0],t.source[1][1]],[t.source[2][0],t.source[2][1]]];n[0][0]-e>this.sourceWorldWidth_/2&&(n[0][0]-=this.sourceWorldWidth_),n[1][0]-e>this.sourceWorldWidth_/2&&(n[1][0]-=this.sourceWorldWidth_),n[2][0]-e>this.sourceWorldWidth_/2&&(n[2][0]-=this.sourceWorldWidth_);let r=Math.min(n[0][0],n[1][0],n[2][0]);Math.max(n[0][0],n[1][0],n[2][0])-r.5&&u<1,p=!1;if(c>0&&(this.targetProj_.isGlobal()&&this.targetWorldWidth_&&(p=I(ae([e,t,n,r]))/this.targetWorldWidth_>ef||p),!f&&this.sourceProj_.isGlobal()&&u&&(p=u>ef||p)),!p&&this.maxSourceExtent_&&isFinite(l[0])&&isFinite(l[1])&&isFinite(l[2])&&isFinite(l[3])&&!Pe(l,this.maxSourceExtent_))return;let m=0;if(!p&&(!isFinite(i[0])||!isFinite(i[1])||!isFinite(a[0])||!isFinite(a[1])||!isFinite(o[0])||!isFinite(o[1])||!isFinite(s[0])||!isFinite(s[1]))){if(c>0)p=!0;else if(m=(!isFinite(i[0])||!isFinite(i[1])?8:0)+(!isFinite(a[0])||!isFinite(a[1])?4:0)+(!isFinite(o[0])||!isFinite(o[1])?2:0)+ +(!isFinite(s[0])||!isFinite(s[1])),m!=1&&m!=2&&m!=4&&m!=8)return}if(c>0){if(!p){let t=[(e[0]+n[0])/2,(e[1]+n[1])/2],r=this.transformInv_(t),a;a=f?(Ke(i[0],d)+Ke(o[0],d))/2-Ke(r[0],d):(i[0]+o[0])/2-r[0];let s=(i[1]+o[1])/2-r[1];p=a*a+s*s>this.errorThresholdSquared_}if(p){if(Math.abs(e[0]-n[0])<=Math.abs(e[1]-n[1])){let l=[(t[0]+n[0])/2,(t[1]+n[1])/2],u=this.transformInv_(l),d=[(r[0]+e[0])/2,(r[1]+e[1])/2],f=this.transformInv_(d);this.addQuad_(e,t,l,d,i,a,u,f,c-1),this.addQuad_(d,l,n,r,f,u,o,s,c-1)}else{let l=[(e[0]+t[0])/2,(e[1]+t[1])/2],u=this.transformInv_(l),d=[(n[0]+r[0])/2,(n[1]+r[1])/2],f=this.transformInv_(d);this.addQuad_(e,l,d,r,i,u,f,s,c-1),this.addQuad_(l,t,n,d,u,a,o,f,c-1)}return}}if(f){if(!this.canWrapXInSource_)return;this.wrapsXInSource_=!0}m&11||this.addTriangle_(e,n,r,i,o,s),m&14||this.addTriangle_(e,n,t,i,o,a),m&&(m&13||this.addTriangle_(t,r,e,a,s,i),m&7||this.addTriangle_(t,r,n,a,s,o))}calculateSourceExtent(){let e=P();return this.triangles_.forEach(function(t,n,r){let i=t.source;ye(e,i[0]),ye(e,i[1]),ye(e,i[2])}),e}getTriangles(){return this.triangles_}},nf=.5,rf=class extends li{constructor(e,t,n,r,i,a,o,s,c,l,u,d){super(i,V.IDLE,d),this.renderEdges_=u!==void 0&&u,this.pixelRatio_=o,this.gutter_=s,this.canvas_=null,this.sourceTileGrid_=t,this.targetTileGrid_=r,this.wrappedTileCoord_=a||i,this.sourceTiles_=[],this.sourcesListenerKeys_=null,this.sourceZ_=0,this.clipExtent_=e.canWrapX()?e.getExtent():void 0;let f=r.getTileCoordExtent(this.wrappedTileCoord_),p=this.targetTileGrid_.getExtent(),m=this.sourceTileGrid_.getExtent(),h=p?Ae(f,p):f;if(Ce(h)===0){this.state=V.EMPTY;return}let g=e.getExtent();g&&(m=m?Ae(m,g):g);let _=r.getResolution(this.wrappedTileCoord_[0]),v=Zd(e,n,h,_);if(!isFinite(v)||v<=0){this.state=V.EMPTY;return}let y=l===void 0?nf:l;if(this.triangulation_=new tf(e,n,h,m,v*y,_),this.triangulation_.getTriangles().length===0){this.state=V.EMPTY;return}this.sourceZ_=t.getZForResolution(v);let b=this.triangulation_.calculateSourceExtent();if(m&&(e.canWrapX()?(b[1]=L(b[1],m[1],m[3]),b[3]=L(b[3],m[1],m[3])):b=Ae(b,m)),!Ce(b))this.state=V.EMPTY;else{let n=0,r=0;e.canWrapX()&&(n=I(g),r=Math.floor((b[0]-g[0])/n)),ze(b.slice(),e,!0).forEach(e=>{let i=t.getTileRangeForExtentAndZ(e,this.sourceZ_);for(let e=i.minX;e<=i.maxX;e++)for(let t=i.minY;t<=i.maxY;t++){let i=r*n;this.sourceTiles_.push({getTile:()=>c(this.sourceZ_,e,t,o),offset:i})}++r}),this.sourceTiles_.length===0&&(this.state=V.EMPTY)}}getImage(){return this.canvas_}reproject_(){let e=[];if(this.sourceTiles_.forEach(t=>{let n=t.tile;if(n&&n.getState()==V.LOADED){let r=this.sourceTileGrid_.getTileCoordExtent(n.tileCoord);r[0]+=t.offset,r[2]+=t.offset;let i=this.clipExtent_?.slice();i&&(i[0]+=t.offset,i[2]+=t.offset),e.push({extent:r,clipExtent:i,image:n.getImage()})}}),this.sourceTiles_.length=0,e.length===0)this.state=V.ERROR;else{let t=this.wrappedTileCoord_[0],n=this.targetTileGrid_.getTileSize(t),r=typeof n==`number`?n:n[0],i=typeof n==`number`?n:n[1],a=this.targetTileGrid_.getResolution(t),o=this.sourceTileGrid_.getResolution(this.sourceZ_),s=this.targetTileGrid_.getTileCoordExtent(this.wrappedTileCoord_);this.canvas_=Qd(r,i,this.pixelRatio_,o,this.sourceTileGrid_.getExtent(),a,s,this.triangulation_,e,this.gutter_,this.renderEdges_,this.interpolate),this.state=V.LOADED}this.changed()}load(){for(let e of this.sourceTiles_)e.tile=e.getTile();if(this.state==V.IDLE){this.state=V.LOADING,this.changed();let e=0;this.sourcesListenerKeys_=[],this.sourceTiles_.forEach(({tile:t})=>{let n=t.getState();if(n==V.IDLE||n==V.LOADING){e++;let n=a(t,c.CHANGE,r=>{let i=t.getState();(i==V.LOADED||i==V.ERROR||i==V.EMPTY)&&(s(n),e--,e===0&&(this.unlistenSources_(),this.reproject_()))});this.sourcesListenerKeys_.push(n)}}),e===0?setTimeout(this.reproject_.bind(this),0):this.sourceTiles_.forEach(function({tile:e},t,n){e.getState()==V.IDLE&&e.load()})}}unlistenSources_(){this.sourcesListenerKeys_.forEach(s),this.sourcesListenerKeys_=null}release(){this.canvas_&&=(fi(this.canvas_.getContext(`2d`)),Kd.push(this.canvas_),null),this.sourceTiles_.length=0,super.release()}},af=class{constructor(e){this.highWaterMark=e===void 0?2048:e,this.count_=0,this.entries_={},this.oldest_=null,this.newest_=null}deleteOldest(){let e=this.pop();e instanceof l&&e.dispose()}canExpireCache(){return this.highWaterMark>0&&this.getCount()>this.highWaterMark}expireCache(e){for(;this.canExpireCache();)this.deleteOldest()}clear(){for(;this.oldest_;)this.deleteOldest()}containsKey(e){return this.entries_.hasOwnProperty(e)}forEach(e){let t=this.oldest_;for(;t;)e(t.value_,t.key_,this),t=t.newer}get(e,t){let n=this.entries_[e];return M(n!==void 0,`Tried to get a value for a key that does not exist in the cache`),n===this.newest_?n.value_:(n===this.oldest_?(this.oldest_=this.oldest_.newer,this.oldest_.older=null):(n.newer.older=n.older,n.older.newer=n.newer),n.newer=null,n.older=this.newest_,this.newest_.newer=n,this.newest_=n,n.value_)}remove(e){let t=this.entries_[e];return M(t!==void 0,`Tried to get a value for a key that does not exist in the cache`),t===this.newest_?(this.newest_=t.older,this.newest_&&(this.newest_.newer=null)):t===this.oldest_?(this.oldest_=t.newer,this.oldest_&&(this.oldest_.older=null)):(t.newer.older=t.older,t.older.newer=t.newer),delete this.entries_[e],--this.count_,t.value_}getCount(){return this.count_}getKeys(){let e=Array(this.count_),t=0,n;for(n=this.newest_;n;n=n.older)e[t++]=n.key_;return e}getValues(){let e=Array(this.count_),t=0,n;for(n=this.newest_;n;n=n.older)e[t++]=n.value_;return e}peekLast(){return this.oldest_.value_}peekLastKey(){return this.oldest_.key_}peekFirstKey(){return this.newest_.key_}peek(e){return this.entries_[e]?.value_}pop(){let e=this.oldest_;return delete this.entries_[e.key_],e.newer&&(e.newer.older=null),this.oldest_=e.newer,this.oldest_||(this.newest_=null),--this.count_,e.value_}replace(e,t){this.get(e),this.entries_[e].value_=t}set(e,t){M(!(e in this.entries_),`Tried to set a value for a key that is used already`);let n={key_:e,newer:null,older:this.newest_,value_:t};this.newest_?this.newest_.newer=n:this.oldest_=n,this.newest_=n,this.entries_[e]=n,++this.count_}setSize(e){this.highWaterMark=e}};function of(e,t,n,r){return r===void 0?[e,t,n]:(r[0]=e,r[1]=t,r[2]=n,r)}function sf(e,t,n){return e+`/`+t+`/`+n}function cf(e,t,n,r,i){return`${k(e)},${t},${sf(n,r,i)}`}function lf(e){return uf(e[0],e[1],e[2])}function uf(e,t,n){return(t<n||n>t.getMaxZoom())return!1;let a=t.getFullTileRange(n);return!a||a.containsXY(r,i)}function ff(e,t,n){if(!(n in e))return e[n]=new Set([t]),!0;let r=e[n],i=r.has(t);return i||r.add(t),!i}function pf(e,t,n){let r=e[n];return r?r.delete(t):!1}function mf(e,t){let n=e.layerStatesArray[e.layerIndex];n.extent&&(t=Ae(t,Nn(n.extent,e.viewState.projection)));let r=n.layer.getRenderSource();if(!r.getWrapX()){let n=r.getTileGridForProjection(e.viewState.projection).getExtent();n&&(t=Ae(t,n))}return t}var hf=class extends Qs{constructor(e,t){super(e),t||={},this.extentChanged=!0,this.renderComplete=!1,this.renderedExtent_=null,this.renderedPixelRatio,this.renderedProjection=null,this.renderedTiles=[],this.renderedSourceRevision_,this.tempExtent=P(),this.tempTileRange_=new dd(0,0,0,0),this.tempTileCoord_=of(0,0,0);let n=t.cacheSize===void 0?512:t.cacheSize;this.tileCache_=new af(n),this.sourceTileCache_=null,this.layerExtent=null,this.maxStaleKeys=n*.5}getTileCache(){return this.tileCache_}getSourceTileCache(){return this.sourceTileCache_||=new af(512),this.sourceTileCache_}getOrCreateTile(e,t,n,r){let i=this.tileCache_,a=this.getLayer().getSource(),o=cf(a,a.getKey(),e,t,n),s;if(i.containsKey(o))s=i.get(o);else{let c=r.viewState.projection,l=a.getProjection();if(s=a.getTile(e,t,n,r.pixelRatio,c,!l||Cn(l,c)?void 0:this.getSourceTileCache()),!s)return null;i.set(o,s)}return s}getTile(e,t,n,r){return this.getOrCreateTile(e,t,n,r)||null}getData(e){let t=this.frameState;if(!t)return null;let n=this.getLayer(),r=z(t.pixelToCoordinateTransform,e.slice()),i=n.getExtent();if(i&&!le(i,r))return null;let a=t.viewState,o=n.getRenderSource(),s=o.getTileGridForProjection(a.projection),c=o.getTilePixelRatio(t.pixelRatio);for(let e=s.getZForResolution(a.resolution);e>=s.getMinZoom();--e){let n=s.getTileCoordForCoordAndZ(r,e),i=this.getTile(e,n[1],n[2],t);if(!i||i.getState()!==V.LOADED)continue;let l=s.getOrigin(e),u=Ho(s.getTileSize(e)),d=s.getResolution(e),f;if(i instanceof vi||i instanceof rf)f=i.getImage();else if(i instanceof Wd){if(f=Vd(i.getData()),!f)continue}else continue;let p=Math.floor(c*((r[0]-l[0])/d-n[1]*u[0])),m=Math.floor(c*((l[1]-r[1])/d-n[2]*u[1])),h=Math.round(c*o.getGutterForProjection(a.projection));return this.getImageData(f,p+h,m+h)}return null}prepareFrame(e){this.renderedProjection?e.viewState.projection!==this.renderedProjection&&(this.tileCache_.clear(),this.renderedProjection=e.viewState.projection):this.renderedProjection=e.viewState.projection;let t=this.getLayer().getSource();if(!t)return!1;let n=t.getRevision();return this.renderedSourceRevision_?this.renderedSourceRevision_!==n&&(this.renderedSourceRevision_=n,this.renderedSourceKey_===t.getKey()&&(this.tileCache_.clear(),this.sourceTileCache_?.clear())):this.renderedSourceRevision_=n,!0}enqueueTilesForNextExtent(){return!0}enqueueTiles(e,t,n,r,i){let a=e.viewState,o=this.getLayer(),s=o.getRenderSource(),c=s.getTileGridForProjection(a.projection),l=k(s);l in e.wantedTiles||(e.wantedTiles[l]={});let u=e.wantedTiles[l],d=o.getMapInternal(),f=Math.max(n-i,c.getMinZoom(),c.getZForResolution(Math.min(o.getMaxResolution(),d?d.getView().getResolutionForZoom(Math.max(o.getMinZoom(),0)):c.getResolution(0)),s.zDirection)),p=a.rotation,m=p?ke(a.center,a.resolution,p,e.size):void 0;for(let i=n;i>=f;--i){let n=c.getTileRangeForExtentAndZ(t,i,this.tempTileRange_),a=c.getResolution(i);for(let t=n.minX;t<=n.maxX;++t)for(let o=n.minY;o<=n.maxY;++o){if(p&&!c.tileCoordIntersectsViewport([i,t,o],m))continue;let n=this.getTile(i,t,o,e);if(!n||!ff(r,n,i))continue;let s=n.getKey();if(u[s]=!0,n.getState()===V.IDLE&&!e.tileQueue.isKeyQueued(s)){let r=of(i,t,o,this.tempTileCoord_);e.tileQueue.enqueue([n,l,c.getTileCoordCenter(r),a])}}}}findStaleTile_(e,t){let n=this.tileCache_,r=e[0],i=e[1],a=e[2],o=this.getStaleKeys();for(let e=0;e0&&setTimeout(()=>{this.enqueueTiles(e,C,f-1,x,S-1)},0),!(f in x))return this.container;let w=k(this),T=e.time;for(let t of x[f]){let n=t.getState();if(n===V.EMPTY)continue;let r=t.tileCoord;if(n===V.LOADED&&t.getAlpha(w,T)===1){t.endTransition(w);continue}if(n!==V.ERROR&&(this.renderComplete=!1),this.findStaleTile_(r,x)){pf(x,t,f),e.animate=!0;continue}if(this.findAltTiles_(u,r,f+1,x))continue;let i=u.getMinZoom();for(let e=f-1;e>=i&&!this.findAltTiles_(u,r,e,x);--e);}let E=p/a*s/h,D=this.getRenderContext(e);zn(this.tempTransform,g/2,_/2,E,E,0,-g/2,-_/2),this.layerExtent&&this.clipUnrotated(D,e,this.layerExtent),l.getInterpolate()||(D.imageSmoothingEnabled=!1),this.preRender(D,e);let O=Object.keys(x).map(Number);O.sort(d);let A=[],j=[],ee=[];for(let t=O.length-1;t>=0;--t){let n=O[t],r=l.getTilePixelSize(n,s,i),a=u.getResolution(n)/p,o=r[0]*a*E,c=r[1]*a*E,d=u.getTileCoordForCoordAndZ(Me(b),n),m=u.getTileCoordExtent(d),g=z(this.tempTransform,[h*(m[0]-b[0])/p,h*(b[3]-m[3])/p]),_=h*l.getGutterForProjection(i);for(let t of x[n]){if(t.getState()!==V.LOADED)continue;let r=t.tileCoord,i=d[1]-r[1],a=Math.round(g[0]-(i-1)*o),s=d[2]-r[2],u=Math.round(g[1]-(s-1)*c),p=Math.round(g[0]-i*o),m=Math.round(g[1]-s*c),h=a-p,v=u-m,y=n===f;if(y&&t.inTransition(w)){ee.push({tile:t,x:p,y:m,w:h,h:v,gutter:_}),this.renderedTiles.unshift(t),this.updateUsedTiles(e.usedTiles,l,t);continue}let b=[p,m,p+h,m+v],x=[];for(let e=0,t=A.length;e0&&(S=Be(b,x)),A.push(b),j.push(n),this.drawTile(t,e,p,m,h,v,_,y,S),this.renderedTiles.unshift(t),this.updateUsedTiles(e.usedTiles,l,t)}}for(let t=0,n=ee.length;t{let n=k(l),r=t.wantedTiles[n],i=r?Object.keys(r).length:0;this.updateCacheSize(i),this.tileCache_.expireCache(),this.sourceTileCache_?.expireCache()}),this.container}updateCacheSize(e){this.tileCache_.highWaterMark=Math.max(this.tileCache_.highWaterMark,e*2)}drawTile(e,t,n,r,i,a,o,s,c){let l;if(e instanceof Wd){if(l=Vd(e.getData()),!l)throw Error(`Rendering array data is not yet supported`)}else l=this.getTileImage(e);if(!l)return;let u=this.getRenderContext(t),d=k(this),f=t.layerStatesArray[t.layerIndex],p=f.opacity*(s?e.getAlpha(d,t.time):1),m=p!==u.globalAlpha;m&&(u.save(),u.globalAlpha=p);let h=l.width-2*o,g=l.height-2*o;if(c){let e=h/i,t=g/a;for(let i=0,a=c.length;ie!==void 0)),this.minZoom=t===void 0?0:t,this.resolutions_=n,M(_(this.resolutions_,(e,t)=>t-e,!0),"`resolutions` must be sorted in descending order");let r;if(!e.origins){for(let e=0,t=this.resolutions_.length-1;e{let n=new dd(Math.min(0,e[0]),Math.max(e[0]-1,-1),Math.min(0,e[1]),Math.max(e[1]-1,-1));if(i){let e=this.getTileRangeForExtentAndZ(i,t);n.minX=Math.max(e.minX,n.minX),n.maxX=Math.min(e.maxX,n.maxX),n.minY=Math.max(e.minY,n.minY),n.maxY=Math.min(e.maxY,n.maxY)}return n}):this.fullTileRanges_=e.tileRanges}forEachTileCoord(e,t,n){let r=this.getTileRangeForExtentAndZ(e,t);for(let e=r.minX,i=r.maxX;e<=i;++e)for(let i=r.minY,a=r.maxY;i<=a;++i)n([t,e,i])}forEachTileCoordParentTileRange(e,t,n,r){let i,a,o,s=null,c=e[0]-1;for(this.zoomFactor_===2?(a=e[1],o=e[2]):s=this.getTileCoordExtent(e,r);c>=this.minZoom;){if(a!==void 0&&o!==void 0?(a=Math.floor(a/2),o=Math.floor(o/2),i=fd(a,a,o,o,n)):i=this.getTileRangeForExtentAndZ(s,c,n),t(c,i))return!0;--c}return!1}getExtent(){return this.extent_}getMaxZoom(){return this.maxZoom}getMinZoom(){return this.minZoom}getOrigin(e){return this.origin_?this.origin_:this.origins_[e]}getOrigins(){return this.origins_}getResolution(e){return this.resolutions_[e]}getResolutions(){return this.resolutions_}getTileCoordChildTileRange(e,t,n){if(e[0]this.maxZoom||t0?r:Math.max(a/n[0],i/n[1]);let o=t+1,s=Array(o);for(let e=0;ethis.getTileInternal(e,t,n,r,o,a),this.reprojectionErrorThreshold_,this.renderReprojectionEdges_,this.tileOptions);return l.key=c,l}getTileInternal(e,t,n,r,i,a){let o=this.getKey(),s=cf(this,o,e,t,n);if(a&&a.containsKey(s))return a.get(s);let c=this.createTile_(e,t,n,r,i,o);return a?.set(s,c),c}setRenderReprojectionEdges(e){this.renderReprojectionEdges_!=e&&(this.renderReprojectionEdges_=e,this.changed())}setTileGridForProjection(e,t){let n=R(e);if(n){let e=k(n);e in this.tileGridForProjection||(this.tileGridForProjection[e]=t)}}};function Uf(e,t){if($r){let n=e.getCrossOrigin(),r=`same-origin`,i=`same-origin`;n===`anonymous`||n===``?(r=`cors`,i=`omit`):n===`use-credentials`&&(r=`cors`,i=`include`);let a={mode:r,credentials:i,referrerPolicy:e.getReferrerPolicy()};fetch(t,a).then(e=>{if(!e.ok)throw Error(`HTTP ${e.status}`);return e.blob()}).then(e=>createImageBitmap(e)).then(t=>{let n=e.getImage();n.width=t.width,n.height=t.height,n.getContext(`2d`).drawImage(t,0,0),t.close?.(),n.dispatchEvent(new Event(`load`))}).catch(()=>{e.getImage().dispatchEvent(new Event(`error`))});return}e.getImage().src=t}var Wf=class extends Hf{constructor(e){e||={};let t=e.projection===void 0?`EPSG:3857`:e.projection,n=e.tileGrid===void 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0?`anonymous`:e.crossOrigin,referrerPolicy:e.referrerPolicy||`origin-when-cross-origin`,interpolate:e.interpolate,maxZoom:e.maxZoom===void 0?19:e.maxZoom,reprojectionErrorThreshold:e.reprojectionErrorThreshold,tileLoadFunction:e.tileLoadFunction,transition:e.transition,url:n,wrapX:e.wrapX,zDirection:e.zDirection})}},qf=class extends e{map;constructor(e){super(`mapView`),this.map=e}async run(){let{leafletTarget:e,mapLon:t=`0`,mapLat:n=`0`,mapGeojson:r}=this.map.dataset,i=Number.parseFloat(t),a=Number.parseFloat(n),o=new Ul({maxZoom:16,enableRotation:!1}),s=new ld({target:e,layers:[new vf({source:new Kf({maxZoom:16})})],view:o});try{let e=new nu({source:new Lo({features:[new re({geometry:new Lr(Sn([i,a]))})]}),style:new Ko({image:new Go({radius:6,fill:new Ro({color:`#3050ff`})})})});s.addLayer(e)}catch(e){console.error(`Failed to create marker layer:`,e)}if(r)try{let e=new Lo({features:new Cd().readFeatures(JSON.parse(r),{dataProjection:`EPSG:4326`,featureProjection:`EPSG:3857`})}),t=new nu({source:e,style:new Ko({stroke:new zo({color:`#3050ff`,width:2}),fill:new Ro({color:`#3050ff33`})})});s.addLayer(t);let n=e.getExtent();n&&o.fit(n,{padding:[20,20,20,20]})}catch(e){console.error(`Failed to create GeoJSON layer:`,e)}}async post(){}};export{qf as default}; -//# sourceMappingURL=Dms-nhjX.min.js.map \ No newline at end of file +//# sourceMappingURL=CFmKEewG.min.js.map \ No newline at end of file diff --git a/searx/static/themes/simple/chunk/Dms-nhjX.min.js.map b/searx/static/themes/simple/chunk/CFmKEewG.min.js.map similarity index 91% rename from searx/static/themes/simple/chunk/Dms-nhjX.min.js.map rename to searx/static/themes/simple/chunk/CFmKEewG.min.js.map index a0f05e11b..b8d281184 100644 --- a/searx/static/themes/simple/chunk/Dms-nhjX.min.js.map +++ b/searx/static/themes/simple/chunk/CFmKEewG.min.js.map @@ -1 +1 @@ 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* @module ol/CollectionEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when an item is added to the collection.\n * @event module:ol/Collection.CollectionEvent#add\n * @api\n */\n ADD: 'add',\n /**\n * Triggered when an item is removed from the collection.\n * @event module:ol/Collection.CollectionEvent#remove\n * @api\n */\n REMOVE: 'remove',\n};\n","/**\n * @module ol/ObjectEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a property is changed.\n * @event module:ol/Object.ObjectEvent#propertychange\n * @api\n */\n PROPERTYCHANGE: 'propertychange',\n};\n\n/**\n * @typedef {'propertychange'} Types\n */\n","/**\n * @module ol/obj\n */\n\n/**\n * Removes all properties from an object.\n * @param {Object} object The object to clear.\n */\nexport function clear(object) {\n for (const property in object) {\n delete object[property];\n }\n}\n\n/**\n * Determine if an object has any properties.\n * @param {Object} object The object to check.\n * @return {boolean} The object is empty.\n */\nexport function isEmpty(object) {\n let property;\n for (property in object) {\n return false;\n }\n return !property;\n}\n","/**\n * @module ol/events\n */\nimport {clear} from './obj.js';\n\n/**\n * Key to use with {@link module:ol/Observable.unByKey}.\n * @typedef {Object} EventsKey\n * @property {ListenerFunction} listener Listener.\n * @property {import(\"./events/Target.js\").EventTargetLike} target Target.\n * @property {string} type Type.\n * @api\n */\n\n/**\n * Listener function. This function is called with an event object as argument.\n * When the function returns `false`, event propagation will stop.\n *\n * @typedef {function((Event|import(\"./events/Event.js\").default)): (void|boolean)} ListenerFunction\n * @api\n */\n\n/**\n * @typedef {Object} ListenerObject\n * @property {ListenerFunction} handleEvent HandleEvent listener function.\n */\n\n/**\n * @typedef {ListenerFunction|ListenerObject} Listener\n */\n\n/**\n * Registers an event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` to a `this` object, and returns\n * a key for use with {@link module:ol/events.unlistenByKey}.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object} [thisArg] Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n * @param {boolean} [once] If true, add the listener as one-off listener.\n * @return {EventsKey} Unique key for the listener.\n */\nexport function listen(target, type, listener, thisArg, once) {\n if (once) {\n const originalListener = listener;\n /**\n * @param {Event|import('./events/Event.js').default} event The event\n * @return {void|boolean} When the function returns `false`, event propagation will stop.\n * @this {typeof target}\n */\n listener = function (event) {\n target.removeEventListener(type, listener);\n return originalListener.call(thisArg ?? this, event);\n };\n } else if (thisArg && thisArg !== target) {\n listener = listener.bind(thisArg);\n }\n const eventsKey = {\n target: target,\n type: type,\n listener: listener,\n };\n target.addEventListener(type, listener);\n return eventsKey;\n}\n\n/**\n * Registers a one-off event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` as self-unregistering listener\n * to a `this` object, and returns a key for use with\n * {@link module:ol/events.unlistenByKey} in case the listener needs to be\n * unregistered before it is called.\n *\n * When {@link module:ol/events.listen} is called with the same arguments after this\n * function, the self-unregistering listener will be turned into a permanent\n * listener.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object} [thisArg] Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n * @return {EventsKey} Key for unlistenByKey.\n */\nexport function listenOnce(target, type, listener, thisArg) {\n return listen(target, type, listener, thisArg, true);\n}\n\n/**\n * Unregisters event listeners on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * The argument passed to this function is the key returned from\n * {@link module:ol/events.listen} or {@link module:ol/events.listenOnce}.\n *\n * @param {EventsKey} key The key.\n */\nexport function unlistenByKey(key) {\n if (key && key.target) {\n key.target.removeEventListener(key.type, key.listener);\n clear(key);\n }\n}\n","/**\n * @module ol/events/EventType\n */\n\n/**\n * @enum {string}\n * @const\n */\nexport default {\n /**\n * Generic change event. Triggered when the revision counter is increased.\n * @event module:ol/events/Event~BaseEvent#change\n * @api\n */\n CHANGE: 'change',\n\n /**\n * Generic error event. Triggered when an error occurs.\n * @event module:ol/events/Event~BaseEvent#error\n * @api\n */\n ERROR: 'error',\n\n BLUR: 'blur',\n CLEAR: 'clear',\n CONTEXTMENU: 'contextmenu',\n CLICK: 'click',\n DBLCLICK: 'dblclick',\n DRAGENTER: 'dragenter',\n DRAGOVER: 'dragover',\n DROP: 'drop',\n FOCUS: 'focus',\n KEYDOWN: 'keydown',\n KEYPRESS: 'keypress',\n LOAD: 'load',\n RESIZE: 'resize',\n TOUCHMOVE: 'touchmove',\n WHEEL: 'wheel',\n};\n","/**\n * @module ol/Disposable\n */\n\n/**\n * @classdesc\n * Objects that need to clean up after themselves.\n */\nclass Disposable {\n constructor() {\n /**\n * The object has already been disposed.\n * @type {boolean}\n * @protected\n */\n this.disposed = false;\n }\n\n /**\n * Clean up.\n */\n dispose() {\n if (!this.disposed) {\n this.disposed = true;\n this.disposeInternal();\n }\n }\n\n /**\n * Extension point for disposable objects.\n * @protected\n */\n disposeInternal() {}\n}\n\nexport default Disposable;\n","/**\n * @module ol/array\n */\n\n/**\n * Performs a binary search on the provided sorted list and returns the index of the item if found. If it can't be found it'll return -1.\n * https://github.com/darkskyapp/binary-search\n *\n * @param {Array<*>} haystack Items to search through.\n * @param {*} needle The item to look for.\n * @param {Function} [comparator] Comparator function.\n * @return {number} The index of the item if found, -1 if not.\n */\nexport function binarySearch(haystack, needle, comparator) {\n let mid, cmp;\n comparator = comparator || ascending;\n let low = 0;\n let high = haystack.length;\n let found = false;\n\n while (low < high) {\n /* Note that \"(low + high) >>> 1\" may overflow, and results in a typecast\n * to double (which gives the wrong results). */\n mid = low + ((high - low) >> 1);\n cmp = +comparator(haystack[mid], needle);\n\n if (cmp < 0.0) {\n /* Too low. */\n low = mid + 1;\n } else {\n /* Key found or too high */\n high = mid;\n found = !cmp;\n }\n }\n\n /* Key not found. */\n return found ? low : ~low;\n}\n\n/**\n * Compare function sorting arrays in ascending order. Safe to use for numeric values.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n * argument is less than, equal to, or greater than the second.\n */\nexport function ascending(a, b) {\n return a > b ? 1 : a < b ? -1 : 0;\n}\n\n/**\n * Compare function sorting arrays in descending order. Safe to use for numeric values.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n * argument is greater than, equal to, or less than the second.\n */\nexport function descending(a, b) {\n return a < b ? 1 : a > b ? -1 : 0;\n}\n\n/**\n * {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution} can use a function\n * of this type to determine which nearest resolution to use.\n *\n * This function takes a `{number}` representing a value between two array entries,\n * a `{number}` representing the value of the nearest higher entry and\n * a `{number}` representing the value of the nearest lower entry\n * as arguments and returns a `{number}`. If a negative number or zero is returned\n * the lower value will be used, if a positive number is returned the higher value\n * will be used.\n * @typedef {function(number, number, number): number} NearestDirectionFunction\n * @api\n */\n\n/**\n * @param {Array} arr Array in descending order.\n * @param {number} target Target.\n * @param {number|NearestDirectionFunction} direction\n * 0 means return the nearest,\n * > 0 means return the largest nearest,\n * < 0 means return the smallest nearest.\n * @return {number} Index.\n */\nexport function linearFindNearest(arr, target, direction) {\n if (arr[0] <= target) {\n return 0;\n }\n\n const n = arr.length;\n if (target <= arr[n - 1]) {\n return n - 1;\n }\n\n if (typeof direction === 'function') {\n for (let i = 1; i < n; ++i) {\n const candidate = arr[i];\n if (candidate === target) {\n return i;\n }\n if (candidate < target) {\n if (direction(target, arr[i - 1], candidate) > 0) {\n return i - 1;\n }\n return i;\n }\n }\n return n - 1;\n }\n\n if (direction > 0) {\n for (let i = 1; i < n; ++i) {\n if (arr[i] < target) {\n return i - 1;\n }\n }\n return n - 1;\n }\n\n if (direction < 0) {\n for (let i = 1; i < n; ++i) {\n if (arr[i] <= target) {\n return i;\n }\n }\n return n - 1;\n }\n\n for (let i = 1; i < n; ++i) {\n if (arr[i] == target) {\n return i;\n }\n if (arr[i] < target) {\n if (arr[i - 1] - target < target - arr[i]) {\n return i - 1;\n }\n return i;\n }\n }\n return n - 1;\n}\n\n/**\n * @param {Array<*>} arr Array.\n * @param {number} begin Begin index.\n * @param {number} end End index.\n */\nexport function reverseSubArray(arr, begin, end) {\n while (begin < end) {\n const tmp = arr[begin];\n arr[begin] = arr[end];\n arr[end] = tmp;\n ++begin;\n --end;\n }\n}\n\n/**\n * @param {Array} arr The array to modify.\n * @param {!Array|VALUE} data The elements or arrays of elements to add to arr.\n * @template VALUE\n */\nexport function extend(arr, data) {\n const extension = Array.isArray(data) ? data : [data];\n const length = extension.length;\n for (let i = 0; i < length; i++) {\n arr[arr.length] = extension[i];\n }\n}\n\n/**\n * @param {Array} arr The array to modify.\n * @param {VALUE} obj The element to remove.\n * @template VALUE\n * @return {boolean} If the element was removed.\n */\nexport function remove(arr, obj) {\n const i = arr.indexOf(obj);\n const found = i > -1;\n if (found) {\n arr.splice(i, 1);\n }\n return found;\n}\n\n/**\n * @param {Array|Uint8ClampedArray} arr1 The first array to compare.\n * @param {Array|Uint8ClampedArray} arr2 The second array to compare.\n * @return {boolean} Whether the two arrays are equal.\n */\nexport function equals(arr1, arr2) {\n const len1 = arr1.length;\n if (len1 !== arr2.length) {\n return false;\n }\n for (let i = 0; i < len1; i++) {\n if (arr1[i] !== arr2[i]) {\n return false;\n }\n }\n return true;\n}\n\n/**\n * Sort the passed array such that the relative order of equal elements is preserved.\n * See https://en.wikipedia.org/wiki/Sorting_algorithm#Stability for details.\n * @param {Array<*>} arr The array to sort (modifies original).\n * @param {!function(*, *): number} compareFnc Comparison function.\n * @api\n * @deprecated\n */\nexport function stableSort(arr, compareFnc) {\n const length = arr.length;\n const tmp = Array(arr.length);\n let i;\n for (i = 0; i < length; i++) {\n tmp[i] = {index: i, value: arr[i]};\n }\n tmp.sort(function (a, b) {\n return compareFnc(a.value, b.value) || a.index - b.index;\n });\n for (i = 0; i < arr.length; i++) {\n arr[i] = tmp[i].value;\n }\n}\n\n/**\n * @param {Array<*>} arr The array to test.\n * @param {Function} [func] Comparison function.\n * @param {boolean} [strict] Strictly sorted (default false).\n * @return {boolean} Return index.\n */\nexport function isSorted(arr, func, strict) {\n const compare = func || ascending;\n return arr.every(function (currentVal, index) {\n if (index === 0) {\n return true;\n }\n const res = compare(arr[index - 1], currentVal);\n return !(res > 0 || (strict && res === 0));\n });\n}\n","/**\n * @module ol/functions\n */\n\nimport {equals as arrayEquals} from './array.js';\n\n/**\n * Always returns true.\n * @return {boolean} true.\n */\nexport function TRUE() {\n return true;\n}\n\n/**\n * Always returns false.\n * @return {boolean} false.\n */\nexport function FALSE() {\n return false;\n}\n\n/**\n * A reusable function, used e.g. as a default for callbacks.\n *\n * @return {void} Nothing.\n */\nexport function VOID() {}\n\n/**\n * Wrap a function in another function that remembers the last return. If the\n * returned function is called twice in a row with the same arguments and the same\n * this object, it will return the value from the first call in the second call.\n *\n * @param {function(...any): ReturnType} fn The function to memoize.\n * @return {function(...any): ReturnType} The memoized function.\n * @template ReturnType\n */\nexport function memoizeOne(fn) {\n /** @type {ReturnType} */\n let lastResult;\n\n /** @type {Array|undefined} */\n let lastArgs;\n\n let lastThis;\n\n /**\n * @this {*} Only need to know if `this` changed, don't care what type\n * @return {ReturnType} Memoized value\n */\n return function () {\n const nextArgs = Array.prototype.slice.call(arguments);\n if (!lastArgs || this !== lastThis || !arrayEquals(nextArgs, lastArgs)) {\n lastThis = this;\n lastArgs = nextArgs;\n lastResult = fn.apply(this, arguments);\n }\n return lastResult;\n };\n}\n\n/**\n * @template T\n * @param {function(): (T | Promise)} getter A function that returns a value or a promise for a value.\n * @return {Promise} A promise for the value.\n */\nexport function toPromise(getter) {\n function promiseGetter() {\n let value;\n try {\n value = getter();\n } catch (err) {\n return Promise.reject(err);\n }\n if (value instanceof Promise) {\n return value;\n }\n return Promise.resolve(value);\n }\n return promiseGetter();\n}\n","/**\n * @module ol/events/Event\n */\n\n/**\n * @classdesc\n * Stripped down implementation of the W3C DOM Level 2 Event interface.\n * See https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface.\n *\n * This implementation only provides `type` and `target` properties, and\n * `stopPropagation` and `preventDefault` methods. It is meant as base class\n * for higher level events defined in the library, and works with\n * {@link module:ol/events/Target~Target}.\n */\nclass BaseEvent {\n /**\n * @param {string} type Type.\n */\n constructor(type) {\n /**\n * @type {boolean}\n */\n this.propagationStopped;\n\n /**\n * @type {boolean}\n */\n this.defaultPrevented;\n\n /**\n * The event type.\n * @type {string}\n * @api\n */\n this.type = type;\n\n /**\n * The event target.\n * @type {Object}\n * @api\n */\n this.target = null;\n }\n\n /**\n * Prevent default. This means that no emulated `click`, `singleclick` or `doubleclick` events\n * will be fired.\n * @api\n */\n preventDefault() {\n this.defaultPrevented = true;\n }\n\n /**\n * Stop event propagation.\n * @api\n */\n stopPropagation() {\n this.propagationStopped = true;\n }\n}\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function stopPropagation(evt) {\n evt.stopPropagation();\n}\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function preventDefault(evt) {\n evt.preventDefault();\n}\n\nexport default BaseEvent;\n","/**\n * @module ol/events/Target\n */\nimport Disposable from '../Disposable.js';\nimport {VOID} from '../functions.js';\nimport {clear} from '../obj.js';\nimport Event from './Event.js';\n\n/**\n * @typedef {EventTarget|Target} EventTargetLike\n */\n\n/**\n * @classdesc\n * A simplified implementation of the W3C DOM Level 2 EventTarget interface.\n * See https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget.\n *\n * There are two important simplifications compared to the specification:\n *\n * 1. The handling of `useCapture` in `addEventListener` and\n * `removeEventListener`. There is no real capture model.\n * 2. The handling of `stopPropagation` and `preventDefault` on `dispatchEvent`.\n * There is no event target hierarchy. When a listener calls\n * `stopPropagation` or `preventDefault` on an event object, it means that no\n * more listeners after this one will be called. Same as when the listener\n * returns false.\n */\nclass Target extends Disposable {\n /**\n * @param {*} [target] Default event target for dispatched events.\n */\n constructor(target) {\n super();\n\n /**\n * @private\n * @type {*}\n */\n this.eventTarget_ = target;\n\n /**\n * @private\n * @type {Object|null}\n */\n this.pendingRemovals_ = null;\n\n /**\n * @private\n * @type {Object|null}\n */\n this.dispatching_ = null;\n\n /**\n * @private\n * @type {Object>|null}\n */\n this.listeners_ = null;\n }\n\n /**\n * @param {string} type Type.\n * @param {import(\"../events.js\").Listener} listener Listener.\n */\n addEventListener(type, listener) {\n if (!type || !listener) {\n return;\n }\n const listeners = this.listeners_ || (this.listeners_ = {});\n const listenersForType = listeners[type] || (listeners[type] = []);\n if (!listenersForType.includes(listener)) {\n listenersForType.push(listener);\n }\n }\n\n /**\n * Dispatches an event and calls all listeners listening for events\n * of this type. The event parameter can either be a string or an\n * Object with a `type` property.\n *\n * @param {import(\"./Event.js\").default|string} event Event object.\n * @return {boolean|undefined} `false` if anyone called preventDefault on the\n * event object or if any of the listeners returned false.\n * @api\n */\n dispatchEvent(event) {\n const isString = typeof event === 'string';\n const type = isString ? event : event.type;\n const listeners = this.listeners_ && this.listeners_[type];\n if (!listeners) {\n return;\n }\n\n const evt = isString ? new Event(event) : /** @type {Event} */ (event);\n if (!evt.target) {\n evt.target = this.eventTarget_ || this;\n }\n const dispatching = this.dispatching_ || (this.dispatching_ = {});\n const pendingRemovals =\n this.pendingRemovals_ || (this.pendingRemovals_ = {});\n if (!(type in dispatching)) {\n dispatching[type] = 0;\n pendingRemovals[type] = 0;\n }\n ++dispatching[type];\n let propagate;\n for (let i = 0, ii = listeners.length; i < ii; ++i) {\n if ('handleEvent' in listeners[i]) {\n propagate = /** @type {import(\"../events.js\").ListenerObject} */ (\n listeners[i]\n ).handleEvent(evt);\n } else {\n propagate = /** @type {import(\"../events.js\").ListenerFunction} */ (\n listeners[i]\n ).call(this, evt);\n }\n if (propagate === false || evt.propagationStopped) {\n propagate = false;\n break;\n }\n }\n if (--dispatching[type] === 0) {\n let pr = pendingRemovals[type];\n delete pendingRemovals[type];\n while (pr--) {\n this.removeEventListener(type, VOID);\n }\n delete dispatching[type];\n }\n return propagate;\n }\n\n /**\n * Clean up.\n * @override\n */\n disposeInternal() {\n this.listeners_ && clear(this.listeners_);\n }\n\n /**\n * Get the listeners for a specified event type. Listeners are returned in the\n * order that they will be called in.\n *\n * @param {string} type Type.\n * @return {Array|undefined} Listeners.\n */\n getListeners(type) {\n return (this.listeners_ && this.listeners_[type]) || undefined;\n }\n\n /**\n * @param {string} [type] Type. If not provided,\n * `true` will be returned if this event target has any listeners.\n * @return {boolean} Has listeners.\n */\n hasListener(type) {\n if (!this.listeners_) {\n return false;\n }\n return type\n ? type in this.listeners_\n : Object.keys(this.listeners_).length > 0;\n }\n\n /**\n * @param {string} type Type.\n * @param {import(\"../events.js\").Listener} listener Listener.\n */\n removeEventListener(type, listener) {\n if (!this.listeners_) {\n return;\n }\n const listeners = this.listeners_[type];\n if (!listeners) {\n return;\n }\n const index = listeners.indexOf(listener);\n if (index !== -1) {\n if (this.pendingRemovals_ && type in this.pendingRemovals_) {\n // make listener a no-op, and remove later in #dispatchEvent()\n listeners[index] = VOID;\n ++this.pendingRemovals_[type];\n } else {\n listeners.splice(index, 1);\n if (listeners.length === 0) {\n delete this.listeners_[type];\n }\n }\n }\n }\n}\n\nexport default Target;\n","/**\n * @module ol/Observable\n */\nimport {listen, listenOnce, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\nimport EventTarget from './events/Target.js';\n\n/***\n * @template {string} Type\n * @template {Event|import(\"./events/Event.js\").default} EventClass\n * @template Return\n * @typedef {(type: Type, listener: (event: EventClass) => ?) => Return} OnSignature\n */\n\n/***\n * @template {string} Type\n * @template Return\n * @typedef {(type: Type[], listener: (event: Event|import(\"./events/Event.js\").default) => ?) => Return extends void ? void : Return[]} CombinedOnSignature\n */\n\n/**\n * @typedef {'change'|'error'} EventTypes\n */\n\n/***\n * @template Return\n * @typedef {OnSignature & CombinedOnSignature} ObservableOnSignature\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * An event target providing convenient methods for listener registration\n * and unregistration. A generic `change` event is always available through\n * {@link module:ol/Observable~Observable#changed}.\n *\n * @fires import(\"./events/Event.js\").default\n * @api\n */\nclass Observable extends EventTarget {\n constructor() {\n super();\n\n this.on =\n /** @type {ObservableOnSignature} */ (\n this.onInternal\n );\n\n this.once =\n /** @type {ObservableOnSignature} */ (\n this.onceInternal\n );\n\n this.un = /** @type {ObservableOnSignature} */ (this.unInternal);\n\n /**\n * @private\n * @type {number}\n */\n this.revision_ = 0;\n }\n\n /**\n * Increases the revision counter and dispatches a 'change' event.\n * @api\n */\n changed() {\n ++this.revision_;\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * Get the version number for this object. Each time the object is modified,\n * its version number will be incremented.\n * @return {number} Revision.\n * @api\n */\n getRevision() {\n return this.revision_;\n }\n\n /**\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener Listener.\n * @return {import(\"./events.js\").EventsKey|Array} Event key.\n * @protected\n */\n onInternal(type, listener) {\n if (Array.isArray(type)) {\n const len = type.length;\n const keys = new Array(len);\n for (let i = 0; i < len; ++i) {\n keys[i] = listen(this, type[i], listener);\n }\n return keys;\n }\n return listen(this, /** @type {string} */ (type), listener);\n }\n\n /**\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener Listener.\n * @return {import(\"./events.js\").EventsKey|Array} Event key.\n * @protected\n */\n onceInternal(type, listener) {\n let key;\n if (Array.isArray(type)) {\n const len = type.length;\n key = new Array(len);\n for (let i = 0; i < len; ++i) {\n key[i] = listenOnce(this, type[i], listener);\n }\n } else {\n key = listenOnce(this, /** @type {string} */ (type), listener);\n }\n /** @type {Object} */ (listener).ol_key = key;\n return key;\n }\n\n /**\n * Unlisten for a certain type of event.\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener Listener.\n * @protected\n */\n unInternal(type, listener) {\n const key = /** @type {Object} */ (listener).ol_key;\n if (key) {\n unByKey(key);\n } else if (Array.isArray(type)) {\n for (let i = 0, ii = type.length; i < ii; ++i) {\n this.removeEventListener(type[i], listener);\n }\n } else {\n this.removeEventListener(type, listener);\n }\n }\n}\n\n/**\n * Listen for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener The listener function.\n * @return {import(\"./events.js\").EventsKey|Array} Unique key for the listener. If\n * called with an array of event types as the first argument, the return\n * will be an array of keys.\n * @api\n */\nObservable.prototype.on;\n\n/**\n * Listen once for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener The listener function.\n * @return {import(\"./events.js\").EventsKey|Array} Unique key for the listener. If\n * called with an array of event types as the first argument, the return\n * will be an array of keys.\n * @api\n */\nObservable.prototype.once;\n\n/**\n * Unlisten for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener The listener function.\n * @api\n */\nObservable.prototype.un;\n\n/**\n * Removes an event listener using the key returned by `on()` or `once()`.\n * @param {import(\"./events.js\").EventsKey|Array} key The key returned by `on()`\n * or `once()` (or an array of keys).\n * @api\n */\nexport function unByKey(key) {\n if (Array.isArray(key)) {\n for (let i = 0, ii = key.length; i < ii; ++i) {\n unlistenByKey(key[i]);\n }\n } else {\n unlistenByKey(/** @type {import(\"./events.js\").EventsKey} */ (key));\n }\n}\n\nexport default Observable;\n","/**\n * @module ol/util\n */\n\n/**\n * @return {never} Any return.\n */\nexport function abstract() {\n throw new Error('Unimplemented abstract method.');\n}\n\n/**\n * Counter for getUid.\n * @type {number}\n * @private\n */\nlet uidCounter_ = 0;\n\n/**\n * Gets a unique ID for an object. This mutates the object so that further calls\n * with the same object as a parameter returns the same value. Unique IDs are generated\n * as a strictly increasing sequence. Adapted from goog.getUid.\n *\n * @param {Object} obj The object to get the unique ID for.\n * @return {string} The unique ID for the object.\n * @api\n */\nexport function getUid(obj) {\n return obj.ol_uid || (obj.ol_uid = String(++uidCounter_));\n}\n\n/**\n * OpenLayers version.\n * @type {string}\n */\nexport const VERSION = '10.10.0';\n","/**\n * @module ol/Object\n */\nimport ObjectEventType from './ObjectEventType.js';\nimport Observable from './Observable.js';\nimport Event from './events/Event.js';\nimport {isEmpty} from './obj.js';\nimport {getUid} from './util.js';\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Object~BaseObject} instances are instances of this type.\n */\nexport class ObjectEvent extends Event {\n /**\n * @param {string} type The event type.\n * @param {string} key The property name.\n * @param {*} oldValue The old value for `key`.\n */\n constructor(type, key, oldValue) {\n super(type);\n\n /**\n * The name of the property whose value is changing.\n * @type {string}\n * @api\n */\n this.key = key;\n\n /**\n * The old value. To get the new value use `e.target.get(e.key)` where\n * `e` is the event object.\n * @type {*}\n * @api\n */\n this.oldValue = oldValue;\n }\n}\n\n/***\n * @template Return\n * @typedef {import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").CombinedOnSignature} ObjectOnSignature\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Most non-trivial classes inherit from this.\n *\n * This extends {@link module:ol/Observable~Observable} with observable\n * properties, where each property is observable as well as the object as a\n * whole.\n *\n * Classes that inherit from this have pre-defined properties, to which you can\n * add your owns. The pre-defined properties are listed in this documentation as\n * 'Observable Properties', and have their own accessors; for example,\n * {@link module:ol/Map~Map} has a `target` property, accessed with\n * `getTarget()` and changed with `setTarget()`. Not all properties are however\n * settable. There are also general-purpose accessors `get()` and `set()`. For\n * example, `get('target')` is equivalent to `getTarget()`.\n *\n * The `set` accessors trigger a change event, and you can monitor this by\n * registering a listener. For example, {@link module:ol/View~View} has a\n * `center` property, so `view.on('change:center', function(evt) {...});` would\n * call the function whenever the value of the center property changes. Within\n * the function, `evt.target` would be the view, so `evt.target.getCenter()`\n * would return the new center.\n *\n * You can add your own observable properties with\n * `object.set('prop', 'value')`, and retrieve that with `object.get('prop')`.\n * You can listen for changes on that property value with\n * `object.on('change:prop', listener)`. You can get a list of all\n * properties with {@link module:ol/Object~BaseObject#getProperties}.\n *\n * Note that the observable properties are separate from standard JS properties.\n * You can, for example, give your map object a title with\n * `map.title='New title'` and with `map.set('title', 'Another title')`. The\n * first will be a `hasOwnProperty`; the second will appear in\n * `getProperties()`. Only the second is observable.\n *\n * Properties can be deleted by using the unset method. E.g.\n * object.unset('foo').\n *\n * @fires ObjectEvent\n * @template {Object} [Properties=Object]\n * @api\n */\nclass BaseObject extends Observable {\n /**\n * @param {NoInfer} [values] An object with key-value pairs.\n */\n constructor(values) {\n super();\n\n /***\n * @type {ObjectOnSignature}\n */\n this.on;\n\n /***\n * @type {ObjectOnSignature}\n */\n this.once;\n\n /***\n * @type {ObjectOnSignature}\n */\n this.un;\n\n // Call {@link module:ol/util.getUid} to ensure that the order of objects' ids is\n // the same as the order in which they were created. This also helps to\n // ensure that object properties are always added in the same order, which\n // helps many JavaScript engines generate faster code.\n getUid(this);\n\n /**\n * @private\n * @type {Partial>|null}\n */\n this.values_ = null;\n\n if (values !== undefined) {\n this.setProperties(values);\n }\n }\n\n /**\n * Gets a value.\n * @param {string} key Key name.\n * @return {*} Value.\n * @api\n */\n get(key) {\n let value;\n if (this.values_ && this.values_.hasOwnProperty(key)) {\n value = this.values_[key];\n }\n return value;\n }\n\n /**\n * Get a list of object property names.\n * @return {Array} List of property names.\n * @api\n */\n getKeys() {\n return (this.values_ && Object.keys(this.values_)) || [];\n }\n\n /**\n * Get an object of all property names and values.\n * @return {NoInfer} Object.\n * @api\n */\n getProperties() {\n return /** @type {NoInfer} */ (\n (this.values_ && Object.assign({}, this.values_)) || {}\n );\n }\n\n /**\n * Get an object of all property names and values.\n * @return {Partial>?} Object.\n */\n getPropertiesInternal() {\n return this.values_;\n }\n\n /**\n * @return {boolean} The object has properties.\n */\n hasProperties() {\n return !!this.values_;\n }\n\n /**\n * @param {string} key Key name.\n * @param {*} oldValue Old value.\n */\n notify(key, oldValue) {\n let eventType;\n eventType = `change:${key}`;\n if (this.hasListener(eventType)) {\n this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n }\n eventType = ObjectEventType.PROPERTYCHANGE;\n if (this.hasListener(eventType)) {\n this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n }\n }\n\n /**\n * @param {string} key Key name.\n * @param {import(\"./events.js\").Listener} listener Listener.\n */\n addChangeListener(key, listener) {\n this.addEventListener(`change:${key}`, listener);\n }\n\n /**\n * @param {string} key Key name.\n * @param {import(\"./events.js\").Listener} listener Listener.\n */\n removeChangeListener(key, listener) {\n this.removeEventListener(`change:${key}`, listener);\n }\n\n /**\n * Sets a value.\n * @param {string} key Key name.\n * @param {*} value Value.\n * @param {boolean} [silent] Update without triggering an event.\n * @api\n */\n set(key, value, silent) {\n const values = this.values_ || (this.values_ = {});\n if (silent) {\n values[key] = value;\n } else {\n const oldValue = values[key];\n values[key] = value;\n if (oldValue !== value) {\n this.notify(key, oldValue);\n }\n }\n }\n\n /**\n * Sets a collection of key-value pairs. Note that this changes any existing\n * properties and adds new ones (it does not remove any existing properties).\n * @param {Partial>} values Values.\n * @param {boolean} [silent] Update without triggering an event.\n * @api\n */\n setProperties(values, silent) {\n for (const key in values) {\n this.set(key, values[key], silent);\n }\n }\n\n /**\n * Apply any properties from another object without triggering events.\n * @param {BaseObject} source The source object.\n * @protected\n */\n applyProperties(source) {\n if (!source.values_) {\n return;\n }\n Object.assign(this.values_ || (this.values_ = {}), source.values_);\n }\n\n /**\n * Unsets a property.\n * @param {string} key Key name.\n * @param {boolean} [silent] Unset without triggering an event.\n * @api\n */\n unset(key, silent) {\n if (this.values_ && key in this.values_) {\n const oldValue = this.values_[key];\n delete this.values_[key];\n if (isEmpty(this.values_)) {\n this.values_ = null;\n }\n if (!silent) {\n this.notify(key, oldValue);\n }\n }\n }\n}\n\nexport default BaseObject;\n","/**\n * @module ol/Collection\n */\nimport CollectionEventType from './CollectionEventType.js';\nimport BaseObject from './Object.js';\nimport Event from './events/Event.js';\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n LENGTH: 'length',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Collection~Collection} instances are instances of this\n * type.\n * @template T\n */\nexport class CollectionEvent extends Event {\n /**\n * @param {import(\"./CollectionEventType.js\").default} type Type.\n * @param {T} element Element.\n * @param {number} index The index of the added or removed element.\n */\n constructor(type, element, index) {\n super(type);\n\n /**\n * The element that is added to or removed from the collection.\n * @type {T}\n * @api\n */\n this.element = element;\n\n /**\n * The index of the added or removed element.\n * @type {number}\n * @api\n */\n this.index = index;\n }\n}\n\n/***\n * @template T\n * @template Return\n * @typedef {import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").OnSignature<'add'|'remove', CollectionEvent, Return> &\n * import(\"./Observable.js\").CombinedOnSignature} CollectionOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [unique=false] Disallow the same item from being added to\n * the collection twice.\n */\n\n/**\n * @classdesc\n * An expanded version of standard JS Array, adding convenience methods for\n * manipulation. Add and remove changes to the Collection trigger a Collection\n * event. Note that this does not cover changes to the objects _within_ the\n * Collection; they trigger events on the appropriate object, not on the\n * Collection as a whole.\n *\n * @fires CollectionEvent\n *\n * @template T\n * @api\n */\nclass Collection extends BaseObject {\n /**\n * @param {Array} [array] Array.\n * @param {Options} [options] Collection options.\n */\n constructor(array, options) {\n super();\n\n /***\n * @type {CollectionOnSignature}\n */\n this.on;\n\n /***\n * @type {CollectionOnSignature}\n */\n this.once;\n\n /***\n * @type {CollectionOnSignature}\n */\n this.un;\n\n options = options || {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.unique_ = !!options.unique;\n\n /**\n * @private\n * @type {!Array}\n */\n this.array_ = array ?? [];\n\n if (this.unique_) {\n for (let i = 1, ii = this.array_.length; i < ii; ++i) {\n this.assertUnique_(this.array_[i], i);\n }\n }\n\n this.updateLength_();\n }\n\n /**\n * Remove all elements from the collection.\n * @api\n */\n clear() {\n while (this.getLength() > 0) {\n this.pop();\n }\n }\n\n /**\n * Add elements to the collection. This pushes each item in the provided array\n * to the end of the collection.\n * @param {!Array} arr Array.\n * @return {Collection} This collection.\n * @api\n */\n extend(arr) {\n for (let i = 0, ii = arr.length; i < ii; ++i) {\n this.push(arr[i]);\n }\n return this;\n }\n\n /**\n * Iterate over each element, calling the provided callback.\n * @param {function(T, number, Array): *} f The function to call\n * for every element. This function takes 3 arguments (the element, the\n * index and the array). The return value is ignored.\n * @api\n */\n forEach(f) {\n const array = this.array_;\n for (let i = 0, ii = array.length; i < ii; ++i) {\n f(array[i], i, array);\n }\n }\n\n /**\n * Get a reference to the underlying Array object. Warning: if the array\n * is mutated, no events will be dispatched by the collection, and the\n * collection's \"length\" property won't be in sync with the actual length\n * of the array.\n * @return {!Array} Array.\n * @api\n */\n getArray() {\n return this.array_;\n }\n\n /**\n * Get the element at the provided index.\n * @param {number} index Index.\n * @return {T} Element.\n * @api\n */\n item(index) {\n return this.array_[index];\n }\n\n /**\n * Get the length of this collection.\n * @return {number} The length of the array.\n * @observable\n * @api\n */\n getLength() {\n return this.get(Property.LENGTH);\n }\n\n /**\n * Insert an element at the provided index.\n * @param {number} index Index.\n * @param {T} elem Element.\n * @api\n */\n insertAt(index, elem) {\n if (index < 0 || index > this.getLength()) {\n throw new Error('Index out of bounds: ' + index);\n }\n if (this.unique_) {\n this.assertUnique_(elem);\n }\n this.array_.splice(index, 0, elem);\n this.updateLength_();\n this.dispatchEvent(\n new CollectionEvent(CollectionEventType.ADD, elem, index),\n );\n }\n\n /**\n * Remove the last element of the collection and return it.\n * Return `undefined` if the collection is empty.\n * @return {T|undefined} Element.\n * @api\n */\n pop() {\n return this.removeAt(this.getLength() - 1);\n }\n\n /**\n * Insert the provided element at the end of the collection.\n * @param {T} elem Element.\n * @return {number} New length of the collection.\n * @api\n */\n push(elem) {\n const n = this.getLength();\n this.insertAt(n, elem);\n return this.getLength();\n }\n\n /**\n * Remove the first occurrence of an element from the collection.\n * @param {T} elem Element.\n * @return {T|undefined} The removed element or undefined if none found.\n * @api\n */\n remove(elem) {\n const arr = this.array_;\n for (let i = 0, ii = arr.length; i < ii; ++i) {\n if (arr[i] === elem) {\n return this.removeAt(i);\n }\n }\n return undefined;\n }\n\n /**\n * Remove the element at the provided index and return it.\n * Return `undefined` if the collection does not contain this index.\n * @param {number} index Index.\n * @return {T|undefined} Value.\n * @api\n */\n removeAt(index) {\n if (index < 0 || index >= this.getLength()) {\n return undefined;\n }\n const prev = this.array_[index];\n this.array_.splice(index, 1);\n this.updateLength_();\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.REMOVE, prev, index)\n ),\n );\n return prev;\n }\n\n /**\n * Set the element at the provided index.\n * @param {number} index Index.\n * @param {T} elem Element.\n * @api\n */\n setAt(index, elem) {\n const n = this.getLength();\n if (index >= n) {\n this.insertAt(index, elem);\n return;\n }\n if (index < 0) {\n throw new Error('Index out of bounds: ' + index);\n }\n if (this.unique_) {\n this.assertUnique_(elem, index);\n }\n const prev = this.array_[index];\n this.array_[index] = elem;\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.REMOVE, prev, index)\n ),\n );\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.ADD, elem, index)\n ),\n );\n }\n\n /**\n * @private\n */\n updateLength_() {\n this.set(Property.LENGTH, this.array_.length);\n }\n\n /**\n * @private\n * @param {T} elem Element.\n * @param {number} [except] Optional index to ignore.\n */\n assertUnique_(elem, except) {\n const array = this.array_;\n for (let i = 0, ii = array.length; i < ii; ++i) {\n if (array[i] === elem && i !== except) {\n throw new Error('Duplicate item added to a unique collection');\n }\n }\n }\n}\n\nexport default Collection;\n","/**\n * @module ol/asserts\n */\n\n/**\n * @param {*} assertion Assertion we expected to be truthy.\n * @param {string} errorMessage Error message.\n */\nexport function assert(assertion, errorMessage) {\n if (!assertion) {\n throw new Error(errorMessage);\n }\n}\n","/**\n * @module ol/Feature\n */\nimport BaseObject from './Object.js';\nimport {assert} from './asserts.js';\nimport {listen, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @typedef {typeof Feature|typeof import(\"./render/Feature.js\").default} FeatureClass\n */\n\n/**\n * @typedef {Feature|import(\"./render/Feature.js\").default} FeatureLike\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").CombinedOnSignature} FeatureOnSignature\n */\n\n/***\n * @template {import(\"./geom/Geometry.js\").default} [Geometry=import(\"./geom/Geometry.js\").default]\n * @template {Object} [Properties=Object]\n * @typedef {Properties & { geometry?: Geometry }} ObjectWithGeometry\n */\n\n/**\n * @classdesc\n * A vector object for geographic features with a geometry and other\n * attribute properties, similar to the features in vector file formats like\n * GeoJSON.\n *\n * Features can be styled individually with `setStyle`; otherwise they use the\n * style of their vector layer.\n *\n * Note that attribute properties are set as {@link module:ol/Object~BaseObject} properties on\n * the feature object, so they are observable, and have get/set accessors.\n *\n * Typically, a feature has a single geometry property. You can set the\n * geometry using the `setGeometry` method and get it with `getGeometry`.\n * It is possible to store more than one geometry on a feature using attribute\n * properties. By default, the geometry used for rendering is identified by\n * the property name `geometry`. If you want to use another geometry property\n * for rendering, use the `setGeometryName` method to change the attribute\n * property associated with the geometry for the feature. For example:\n *\n * ```js\n *\n * import Feature from 'ol/Feature.js';\n * import Polygon from 'ol/geom/Polygon.js';\n * import Point from 'ol/geom/Point.js';\n *\n * const feature = new Feature({\n * geometry: new Polygon(polyCoords),\n * labelPoint: new Point(labelCoords),\n * name: 'My Polygon',\n * });\n *\n * // get the polygon geometry\n * const poly = feature.getGeometry();\n *\n * // Render the feature as a point using the coordinates from labelPoint\n * feature.setGeometryName('labelPoint');\n *\n * // get the point geometry\n * const point = feature.getGeometry();\n * ```\n *\n * @api\n * @template {import(\"./geom/Geometry.js\").default} [Geometry=import(\"./geom/Geometry.js\").default]\n * @template {Object} [Properties=Object]\n * @extends {BaseObject>}\n */\nclass Feature extends BaseObject {\n /**\n * @param {Geometry|ObjectWithGeometry>} [geometryOrProperties]\n * You may pass a Geometry object directly, or an object literal containing\n * properties. If you pass an object literal, you may include a Geometry\n * associated with a `geometry` key.\n */\n constructor(geometryOrProperties) {\n super();\n\n /***\n * @type {FeatureOnSignature}\n */\n this.on;\n\n /***\n * @type {FeatureOnSignature}\n */\n this.once;\n\n /***\n * @type {FeatureOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {number|string|undefined}\n */\n this.id_ = undefined;\n\n /**\n * @type {string}\n * @private\n */\n this.geometryName_ = 'geometry';\n\n /**\n * User provided style.\n * @private\n * @type {import(\"./style/Style.js\").StyleLike}\n */\n this.style_ = null;\n\n /**\n * @private\n * @type {import(\"./style/Style.js\").StyleFunction|undefined}\n */\n this.styleFunction_ = undefined;\n\n /**\n * @private\n * @type {?import(\"./events.js\").EventsKey}\n */\n this.geometryChangeKey_ = null;\n\n this.addChangeListener(this.geometryName_, this.handleGeometryChanged_);\n\n if (geometryOrProperties) {\n if (\n typeof (\n /** @type {?} */ (geometryOrProperties).getSimplifiedGeometry\n ) === 'function'\n ) {\n const geometry = /** @type {Geometry} */ (geometryOrProperties);\n this.setGeometry(geometry);\n } else {\n /** @type {?} */\n const properties = geometryOrProperties;\n this.setProperties(properties);\n }\n }\n }\n\n /**\n * Clone this feature. If the original feature has a geometry it\n * is also cloned. The feature id is not set in the clone.\n * @return {Feature} The clone.\n * @api\n */\n clone() {\n const clone = /** @type {Feature} */ (new Feature());\n const geometryName = this.geometryName_;\n clone.setGeometryName(geometryName);\n\n const properties = this.getPropertiesInternal();\n if (properties) {\n const geometry = this.getGeometry();\n for (const key in properties) {\n if (key === geometryName && geometry) {\n clone.set(key, geometry.clone());\n } else {\n clone.set(key, properties[key], true);\n }\n }\n }\n\n const style = this.getStyle();\n if (style) {\n clone.setStyle(style);\n }\n return clone;\n }\n\n /**\n * Get the feature's default geometry. A feature may have any number of named\n * geometries. The \"default\" geometry (the one that is rendered by default) is\n * set when calling {@link module:ol/Feature~Feature#setGeometry}.\n * @return {Geometry|undefined} The default geometry for the feature.\n * @api\n * @observable\n */\n getGeometry() {\n return /** @type {Geometry|undefined} */ (this.get(this.geometryName_));\n }\n\n /**\n * Get the feature identifier. This is a stable identifier for the feature and\n * is either set when reading data from a remote source or set explicitly by\n * calling {@link module:ol/Feature~Feature#setId}.\n * @return {number|string|undefined} Id.\n * @api\n */\n getId() {\n return this.id_;\n }\n\n /**\n * Get the name of the feature's default geometry. By default, the default\n * geometry is named `geometry`.\n * @return {string} Get the property name associated with the default geometry\n * for this feature.\n * @api\n */\n getGeometryName() {\n return this.geometryName_;\n }\n\n /**\n * Get the feature's style. Will return what was provided to the\n * {@link module:ol/Feature~Feature#setStyle} method.\n * @return {import(\"./style/Style.js\").StyleLike|undefined} The feature style.\n * @api\n */\n getStyle() {\n return this.style_;\n }\n\n /**\n * Get the feature's style function.\n * @return {import(\"./style/Style.js\").StyleFunction|undefined} Return a function\n * representing the current style of this feature.\n * @api\n */\n getStyleFunction() {\n return this.styleFunction_;\n }\n\n /**\n * @private\n */\n handleGeometryChange_() {\n this.changed();\n }\n\n /**\n * @private\n */\n handleGeometryChanged_() {\n if (this.geometryChangeKey_) {\n unlistenByKey(this.geometryChangeKey_);\n this.geometryChangeKey_ = null;\n }\n const geometry = this.getGeometry();\n if (geometry) {\n this.geometryChangeKey_ = listen(\n geometry,\n EventType.CHANGE,\n this.handleGeometryChange_,\n this,\n );\n }\n this.changed();\n }\n\n /**\n * Set the default geometry for the feature. This will update the property\n * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.\n * @param {Geometry|undefined} geometry The new geometry.\n * @api\n * @observable\n */\n setGeometry(geometry) {\n this.set(this.geometryName_, geometry);\n }\n\n /**\n * Set the style for the feature to override the layer style. This can be a\n * single style object, an array of styles, or a function that takes a\n * resolution and returns an array of styles. To unset the feature style, call\n * `setStyle()` without arguments or a falsey value.\n * @param {import(\"./style/Style.js\").StyleLike} [style] Style for this feature.\n * @api\n * @fires module:ol/events/Event~BaseEvent#event:change\n */\n setStyle(style) {\n this.style_ = style;\n this.styleFunction_ = !style ? undefined : createStyleFunction(style);\n this.changed();\n }\n\n /**\n * Set the feature id. The feature id is considered stable and may be used when\n * requesting features or comparing identifiers returned from a remote source.\n * The feature id can be used with the\n * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.\n * @param {number|string|undefined} id The feature id.\n * @api\n * @fires module:ol/events/Event~BaseEvent#event:change\n */\n setId(id) {\n this.id_ = id;\n this.changed();\n }\n\n /**\n * Set the property name to be used when getting the feature's default geometry.\n * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with\n * this name will be returned.\n * @param {string} name The property name of the default geometry.\n * @api\n */\n setGeometryName(name) {\n if (name === this.geometryName_) {\n return;\n }\n this.removeChangeListener(this.geometryName_, this.handleGeometryChanged_);\n this.geometryName_ = name;\n this.addChangeListener(this.geometryName_, this.handleGeometryChanged_);\n this.handleGeometryChanged_();\n }\n}\n\n/**\n * Convert the provided object into a feature style function. Functions passed\n * through unchanged. Arrays of Style or single style objects wrapped\n * in a new feature style function.\n * @param {!import(\"./style/Style.js\").StyleFunction|!Array|!import(\"./style/Style.js\").default} obj\n * A feature style function, a single style, or an array of styles.\n * @return {import(\"./style/Style.js\").StyleFunction} A style function.\n */\nexport function createStyleFunction(obj) {\n if (typeof obj === 'function') {\n return obj;\n }\n /**\n * @type {Array}\n */\n let styles;\n if (Array.isArray(obj)) {\n styles = obj;\n } else {\n assert(\n typeof (/** @type {?} */ (obj).getZIndex) === 'function',\n 'Expected an `ol/style/Style` or an array of `ol/style/Style.js`',\n );\n const style = /** @type {import(\"./style/Style.js\").default} */ (obj);\n styles = [style];\n }\n return function () {\n return styles;\n };\n}\nexport default Feature;\n","/**\n * @module ol/extent/Relationship\n */\n\n/**\n * Relationship to an extent.\n * @enum {number}\n */\nexport default {\n UNKNOWN: 0,\n INTERSECTING: 1,\n ABOVE: 2,\n RIGHT: 4,\n BELOW: 8,\n LEFT: 16,\n};\n","/**\n * @module ol/extent\n */\nimport Relationship from './extent/Relationship.js';\n\n/**\n * An array of numbers representing an extent: `[minx, miny, maxx, maxy]`.\n * @typedef {Array} Extent\n * @api\n */\n\n/**\n * Extent corner.\n * @typedef {'bottom-left' | 'bottom-right' | 'top-left' | 'top-right'} Corner\n */\n\n/**\n * Build an extent that includes all given coordinates.\n *\n * @param {Array} coordinates Coordinates.\n * @return {Extent} Bounding extent.\n * @api\n */\nexport function boundingExtent(coordinates) {\n const extent = createEmpty();\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n extendCoordinate(extent, coordinates[i]);\n }\n return extent;\n}\n\n/**\n * @param {Array} xs Xs.\n * @param {Array} ys Ys.\n * @param {Extent} [dest] Destination extent.\n * @private\n * @return {Extent} Extent.\n */\nfunction _boundingExtentXYs(xs, ys, dest) {\n const minX = Math.min.apply(null, xs);\n const minY = Math.min.apply(null, ys);\n const maxX = Math.max.apply(null, xs);\n const maxY = Math.max.apply(null, ys);\n return createOrUpdate(minX, minY, maxX, maxY, dest);\n}\n\n/**\n * Return extent increased by the provided value.\n * @param {Extent} extent Extent.\n * @param {number} value The amount by which the extent should be buffered.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n * @api\n */\nexport function buffer(extent, value, dest) {\n if (dest) {\n dest[0] = extent[0] - value;\n dest[1] = extent[1] - value;\n dest[2] = extent[2] + value;\n dest[3] = extent[3] + value;\n return dest;\n }\n return [\n extent[0] - value,\n extent[1] - value,\n extent[2] + value,\n extent[3] + value,\n ];\n}\n\n/**\n * Creates a clone of an extent.\n *\n * @param {Extent} extent Extent to clone.\n * @param {Extent} [dest] Extent.\n * @return {Extent} The clone.\n */\nexport function clone(extent, dest) {\n if (dest) {\n dest[0] = extent[0];\n dest[1] = extent[1];\n dest[2] = extent[2];\n dest[3] = extent[3];\n return dest;\n }\n return extent.slice();\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {number} Closest squared distance.\n */\nexport function closestSquaredDistanceXY(extent, x, y) {\n let dx, dy;\n if (x < extent[0]) {\n dx = extent[0] - x;\n } else if (extent[2] < x) {\n dx = x - extent[2];\n } else {\n dx = 0;\n }\n if (y < extent[1]) {\n dy = extent[1] - y;\n } else if (extent[3] < y) {\n dy = y - extent[3];\n } else {\n dy = 0;\n }\n return dx * dx + dy * dy;\n}\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} The coordinate is contained in the extent.\n * @api\n */\nexport function containsCoordinate(extent, coordinate) {\n return containsXY(extent, coordinate[0], coordinate[1]);\n}\n\n/**\n * Check if one extent contains another.\n *\n * An extent is deemed contained if it lies completely within the other extent,\n * including if they share one or more edges.\n *\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The second extent is contained by or on the edge of the\n * first.\n * @api\n */\nexport function containsExtent(extent1, extent2) {\n return (\n extent1[0] <= extent2[0] &&\n extent2[2] <= extent1[2] &&\n extent1[1] <= extent2[1] &&\n extent2[3] <= extent1[3]\n );\n}\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n * @return {boolean} The x, y values are contained in the extent.\n * @api\n */\nexport function containsXY(extent, x, y) {\n return extent[0] <= x && x <= extent[2] && extent[1] <= y && y <= extent[3];\n}\n\n/**\n * Get the relationship between a coordinate and extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate The coordinate.\n * @return {import(\"./extent/Relationship.js\").default} The relationship (bitwise compare with\n * import(\"./extent/Relationship.js\").Relationship).\n */\nexport function coordinateRelationship(extent, coordinate) {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const x = coordinate[0];\n const y = coordinate[1];\n let relationship = Relationship.UNKNOWN;\n if (x < minX) {\n relationship = relationship | Relationship.LEFT;\n } else if (x > maxX) {\n relationship = relationship | Relationship.RIGHT;\n }\n if (y < minY) {\n relationship = relationship | Relationship.BELOW;\n } else if (y > maxY) {\n relationship = relationship | Relationship.ABOVE;\n }\n if (relationship === Relationship.UNKNOWN) {\n relationship = Relationship.INTERSECTING;\n }\n return relationship;\n}\n\n/**\n * Create an empty extent.\n * @return {Extent} Empty extent.\n * @api\n */\nexport function createEmpty() {\n return [Infinity, Infinity, -Infinity, -Infinity];\n}\n\n/**\n * Create a new extent or update the provided extent.\n * @param {number} minX Minimum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxX Maximum X.\n * @param {number} maxY Maximum Y.\n * @param {Extent} [dest] Destination extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdate(minX, minY, maxX, maxY, dest) {\n if (dest) {\n dest[0] = minX;\n dest[1] = minY;\n dest[2] = maxX;\n dest[3] = maxY;\n return dest;\n }\n return [minX, minY, maxX, maxY];\n}\n\n/**\n * Create a new empty extent or make the provided one empty.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateEmpty(dest) {\n return createOrUpdate(Infinity, Infinity, -Infinity, -Infinity, dest);\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinate(coordinate, dest) {\n const x = coordinate[0];\n const y = coordinate[1];\n return createOrUpdate(x, y, x, y, dest);\n}\n\n/**\n * @param {Array} coordinates Coordinates.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinates(coordinates, dest) {\n const extent = createOrUpdateEmpty(dest);\n return extendCoordinates(extent, coordinates);\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromFlatCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n dest,\n) {\n const extent = createOrUpdateEmpty(dest);\n return extendFlatCoordinates(extent, flatCoordinates, offset, end, stride);\n}\n\n/**\n * @param {Array>} rings Rings.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromRings(rings, dest) {\n const extent = createOrUpdateEmpty(dest);\n return extendRings(extent, rings);\n}\n\n/**\n * Determine if two extents are equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The two extents are equivalent.\n * @api\n */\nexport function equals(extent1, extent2) {\n return (\n extent1[0] == extent2[0] &&\n extent1[2] == extent2[2] &&\n extent1[1] == extent2[1] &&\n extent1[3] == extent2[3]\n );\n}\n\n/**\n * Determine if two extents are approximately equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {number} tolerance Tolerance in extent coordinate units.\n * @return {boolean} The two extents differ by less than the tolerance.\n */\nexport function approximatelyEquals(extent1, extent2, tolerance) {\n return (\n Math.abs(extent1[0] - extent2[0]) < tolerance &&\n Math.abs(extent1[2] - extent2[2]) < tolerance &&\n Math.abs(extent1[1] - extent2[1]) < tolerance &&\n Math.abs(extent1[3] - extent2[3]) < tolerance\n );\n}\n\n/**\n * Modify an extent to include another extent.\n * @param {Extent} extent1 The extent to be modified.\n * @param {Extent} extent2 The extent that will be included in the first.\n * @return {Extent} A reference to the first (extended) extent.\n * @api\n */\nexport function extend(extent1, extent2) {\n if (extent2[0] < extent1[0]) {\n extent1[0] = extent2[0];\n }\n if (extent2[2] > extent1[2]) {\n extent1[2] = extent2[2];\n }\n if (extent2[1] < extent1[1]) {\n extent1[1] = extent2[1];\n }\n if (extent2[3] > extent1[3]) {\n extent1[3] = extent2[3];\n }\n return extent1;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n */\nexport function extendCoordinate(extent, coordinate) {\n if (coordinate[0] < extent[0]) {\n extent[0] = coordinate[0];\n }\n if (coordinate[0] > extent[2]) {\n extent[2] = coordinate[0];\n }\n if (coordinate[1] < extent[1]) {\n extent[1] = coordinate[1];\n }\n if (coordinate[1] > extent[3]) {\n extent[3] = coordinate[1];\n }\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array} coordinates Coordinates.\n * @return {Extent} Extent.\n */\nexport function extendCoordinates(extent, coordinates) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n extendCoordinate(extent, coordinates[i]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Extent} Extent.\n */\nexport function extendFlatCoordinates(\n extent,\n flatCoordinates,\n offset,\n end,\n stride,\n) {\n for (; offset < end; offset += stride) {\n extendXY(extent, flatCoordinates[offset], flatCoordinates[offset + 1]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array>} rings Rings.\n * @return {Extent} Extent.\n */\nexport function extendRings(extent, rings) {\n for (let i = 0, ii = rings.length; i < ii; ++i) {\n extendCoordinates(extent, rings[i]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n */\nexport function extendXY(extent, x, y) {\n extent[0] = Math.min(extent[0], x);\n extent[1] = Math.min(extent[1], y);\n extent[2] = Math.max(extent[2], x);\n extent[3] = Math.max(extent[3], y);\n}\n\n/**\n * This function calls `callback` for each corner of the extent. If the\n * callback returns a truthy value the function returns that value\n * immediately. Otherwise the function returns `false`.\n * @param {Extent} extent Extent.\n * @param {function(import(\"./coordinate.js\").Coordinate): S} callback Callback.\n * @return {S|boolean} Value.\n * @template S\n */\nexport function forEachCorner(extent, callback) {\n let val;\n val = callback(getBottomLeft(extent));\n if (val) {\n return val;\n }\n val = callback(getBottomRight(extent));\n if (val) {\n return val;\n }\n val = callback(getTopRight(extent));\n if (val) {\n return val;\n }\n val = callback(getTopLeft(extent));\n if (val) {\n return val;\n }\n return false;\n}\n\n/**\n * Get the size of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Area.\n * @api\n */\nexport function getArea(extent) {\n let area = 0;\n if (!isEmpty(extent)) {\n area = getWidth(extent) * getHeight(extent);\n }\n return area;\n}\n\n/**\n * Get the bottom left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom left coordinate.\n * @api\n */\nexport function getBottomLeft(extent) {\n return [extent[0], extent[1]];\n}\n\n/**\n * Get the bottom right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom right coordinate.\n * @api\n */\nexport function getBottomRight(extent) {\n return [extent[2], extent[1]];\n}\n\n/**\n * Get the center coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Center.\n * @api\n */\nexport function getCenter(extent) {\n return [(extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2];\n}\n\n/**\n * Get a corner coordinate of an extent.\n * @param {Extent} extent Extent.\n * @param {Corner} corner Corner.\n * @return {import(\"./coordinate.js\").Coordinate} Corner coordinate.\n */\nexport function getCorner(extent, corner) {\n let coordinate;\n if (corner === 'bottom-left') {\n coordinate = getBottomLeft(extent);\n } else if (corner === 'bottom-right') {\n coordinate = getBottomRight(extent);\n } else if (corner === 'top-left') {\n coordinate = getTopLeft(extent);\n } else if (corner === 'top-right') {\n coordinate = getTopRight(extent);\n } else {\n throw new Error('Invalid corner');\n }\n return coordinate;\n}\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Enlarged area.\n */\nexport function getEnlargedArea(extent1, extent2) {\n const minX = Math.min(extent1[0], extent2[0]);\n const minY = Math.min(extent1[1], extent2[1]);\n const maxX = Math.max(extent1[2], extent2[2]);\n const maxY = Math.max(extent1[3], extent2[3]);\n return (maxX - minX) * (maxY - minY);\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @param {Extent} [dest] Destination extent.\n * @return {Extent} Extent.\n */\nexport function getForViewAndSize(center, resolution, rotation, size, dest) {\n const [x0, y0, x1, y1, x2, y2, x3, y3] = getRotatedViewport(\n center,\n resolution,\n rotation,\n size,\n );\n return createOrUpdate(\n Math.min(x0, x1, x2, x3),\n Math.min(y0, y1, y2, y3),\n Math.max(x0, x1, x2, x3),\n Math.max(y0, y1, y2, y3),\n dest,\n );\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @return {Array} Linear ring representing the viewport.\n */\nexport function getRotatedViewport(center, resolution, rotation, size) {\n const dx = (resolution * size[0]) / 2;\n const dy = (resolution * size[1]) / 2;\n const cosRotation = Math.cos(rotation);\n const sinRotation = Math.sin(rotation);\n const xCos = dx * cosRotation;\n const xSin = dx * sinRotation;\n const yCos = dy * cosRotation;\n const ySin = dy * sinRotation;\n const x = center[0];\n const y = center[1];\n return [\n x - xCos + ySin,\n y - xSin - yCos,\n x - xCos - ySin,\n y - xSin + yCos,\n x + xCos - ySin,\n y + xSin + yCos,\n x + xCos + ySin,\n y + xSin - yCos,\n x - xCos + ySin,\n y - xSin - yCos,\n ];\n}\n\n/**\n * Get the height of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Height.\n * @api\n */\nexport function getHeight(extent) {\n return extent[3] - extent[1];\n}\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Intersection area.\n */\nexport function getIntersectionArea(extent1, extent2) {\n const intersection = getIntersection(extent1, extent2);\n return getArea(intersection);\n}\n\n/**\n * Get the intersection of two extents.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {Extent} [dest] Optional extent to populate with intersection.\n * @return {Extent} Intersecting extent.\n * @api\n */\nexport function getIntersection(extent1, extent2, dest) {\n const intersection = dest ? dest : createEmpty();\n if (intersects(extent1, extent2)) {\n if (extent1[0] > extent2[0]) {\n intersection[0] = extent1[0];\n } else {\n intersection[0] = extent2[0];\n }\n if (extent1[1] > extent2[1]) {\n intersection[1] = extent1[1];\n } else {\n intersection[1] = extent2[1];\n }\n if (extent1[2] < extent2[2]) {\n intersection[2] = extent1[2];\n } else {\n intersection[2] = extent2[2];\n }\n if (extent1[3] < extent2[3]) {\n intersection[3] = extent1[3];\n } else {\n intersection[3] = extent2[3];\n }\n } else {\n createOrUpdateEmpty(intersection);\n }\n return intersection;\n}\n\n/**\n * Get the difference between two extents, i.e. the area(s) of `extent1` that\n * are not covered by `extent2`. Returns an array of between 0 and 4 extents.\n *\n * When the extents do not intersect the returned array contains `extent1` as\n * its only element. When `extent2` completely contains `extent1` the returned\n * array is empty. Otherwise up to four non-overlapping extents are returned\n * that together cover exactly the parts of `extent1` outside `extent2`.\n *\n * The decomposition used is:\n *\n * ```\n * ┌────┬─────────┬────┐ ← y2\n * │ │ top │ │\n * │ ├─────────┤ │ ← iy2\n * │left│ (gone) │right│\n * │ ├─────────┤ │ ← iy1\n * │ │ bottom │ │\n * └────┴─────────┴────┘ ← y1\n * x1 ix1 ix2 x2\n * ```\n *\n * The left and right strips span the full height of `extent1` while the top\n * and bottom strips are clamped horizontally to the intersection, so the four\n * rectangles tile perfectly without overlap or gaps.\n *\n * @param {Extent} extent1 Extent to subtract from.\n * @param {Extent} extent2 Extent to subtract.\n * @return {Array} Remaining extents (0–4 elements).\n * @api\n */\nexport function getDifference(extent1, extent2) {\n if (!intersects(extent1, extent2)) {\n return [extent1.slice()];\n }\n if (containsExtent(extent2, extent1)) {\n return [];\n }\n\n const [x1, y1, x2, y2] = extent1;\n const ix1 = Math.max(x1, extent2[0]);\n const iy1 = Math.max(y1, extent2[1]);\n const ix2 = Math.min(x2, extent2[2]);\n const iy2 = Math.min(y2, extent2[3]);\n\n const result = [];\n\n // Left strip (full height of extent1)\n if (ix1 > x1) {\n result.push([x1, y1, ix1, y2]);\n }\n // Right strip (full height of extent1)\n if (ix2 < x2) {\n result.push([ix2, y1, x2, y2]);\n }\n // Bottom strip (between the left and right strips)\n if (iy1 > y1) {\n result.push([ix1, y1, ix2, iy1]);\n }\n // Top strip (between the left and right strips)\n if (iy2 < y2) {\n result.push([ix1, iy2, ix2, y2]);\n }\n\n return result;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @return {number} Margin.\n */\nexport function getMargin(extent) {\n return getWidth(extent) + getHeight(extent);\n}\n\n/**\n * Get the size (width, height) of an extent.\n * @param {Extent} extent The extent.\n * @return {import(\"./size.js\").Size} The extent size.\n * @api\n */\nexport function getSize(extent) {\n return [extent[2] - extent[0], extent[3] - extent[1]];\n}\n\n/**\n * Get the top left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top left coordinate.\n * @api\n */\nexport function getTopLeft(extent) {\n return [extent[0], extent[3]];\n}\n\n/**\n * Get the top right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top right coordinate.\n * @api\n */\nexport function getTopRight(extent) {\n return [extent[2], extent[3]];\n}\n\n/**\n * Get the width of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Width.\n * @api\n */\nexport function getWidth(extent) {\n return extent[2] - extent[0];\n}\n\n/**\n * Determine if one extent intersects another.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent.\n * @return {boolean} The two extents intersect.\n * @api\n */\nexport function intersects(extent1, extent2) {\n return (\n extent1[0] <= extent2[2] &&\n extent1[2] >= extent2[0] &&\n extent1[1] <= extent2[3] &&\n extent1[3] >= extent2[1]\n );\n}\n\n/**\n * Determine if an extent is empty.\n * @param {Extent} extent Extent.\n * @return {boolean} Is empty.\n * @api\n */\nexport function isEmpty(extent) {\n return extent[2] < extent[0] || extent[3] < extent[1];\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function returnOrUpdate(extent, dest) {\n if (dest) {\n dest[0] = extent[0];\n dest[1] = extent[1];\n dest[2] = extent[2];\n dest[3] = extent[3];\n return dest;\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} value Value.\n */\nexport function scaleFromCenter(extent, value) {\n const deltaX = ((extent[2] - extent[0]) / 2) * (value - 1);\n const deltaY = ((extent[3] - extent[1]) / 2) * (value - 1);\n extent[0] -= deltaX;\n extent[2] += deltaX;\n extent[1] -= deltaY;\n extent[3] += deltaY;\n}\n\n/**\n * Determine if the segment between two coordinates intersects (crosses,\n * touches, or is contained by) the provided extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} start Segment start coordinate.\n * @param {import(\"./coordinate.js\").Coordinate} end Segment end coordinate.\n * @return {boolean} The segment intersects the extent.\n */\nexport function intersectsSegment(extent, start, end) {\n let intersects = false;\n const startRel = coordinateRelationship(extent, start);\n const endRel = coordinateRelationship(extent, end);\n if (\n startRel === Relationship.INTERSECTING ||\n endRel === Relationship.INTERSECTING\n ) {\n intersects = true;\n } else {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const startX = start[0];\n const startY = start[1];\n const endX = end[0];\n const endY = end[1];\n const slope = (endY - startY) / (endX - startX);\n let x, y;\n if (!!(endRel & Relationship.ABOVE) && !(startRel & Relationship.ABOVE)) {\n // potentially intersects top\n x = endX - (endY - maxY) / slope;\n intersects = x >= minX && x <= maxX;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.RIGHT) &&\n !(startRel & Relationship.RIGHT)\n ) {\n // potentially intersects right\n y = endY - (endX - maxX) * slope;\n intersects = y >= minY && y <= maxY;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.BELOW) &&\n !(startRel & Relationship.BELOW)\n ) {\n // potentially intersects bottom\n x = endX - (endY - minY) / slope;\n intersects = x >= minX && x <= maxX;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.LEFT) &&\n !(startRel & Relationship.LEFT)\n ) {\n // potentially intersects left\n y = endY - (endX - minX) * slope;\n intersects = y >= minY && y <= maxY;\n }\n }\n return intersects;\n}\n\n/**\n * Apply a transform function to the extent.\n * @param {Extent} extent Extent.\n * @param {import(\"./proj.js\").TransformFunction} transformFn Transform function.\n * Called with `[minX, minY, maxX, maxY]` extent coordinates.\n * @param {Extent} [dest] Destination extent.\n * @param {number} [stops] Number of stops per side used for the transform.\n * By default only the corners are used.\n * @return {Extent} Extent.\n * @api\n */\nexport function applyTransform(extent, transformFn, dest, stops) {\n if (isEmpty(extent)) {\n return createOrUpdateEmpty(dest);\n }\n let coordinates = [];\n if (stops > 1) {\n const width = extent[2] - extent[0];\n const height = extent[3] - extent[1];\n for (let i = 0; i < stops; ++i) {\n coordinates.push(\n extent[0] + (width * i) / stops,\n extent[1],\n extent[2],\n extent[1] + (height * i) / stops,\n extent[2] - (width * i) / stops,\n extent[3],\n extent[0],\n extent[3] - (height * i) / stops,\n );\n }\n } else {\n coordinates = [\n extent[0],\n extent[1],\n extent[2],\n extent[1],\n extent[2],\n extent[3],\n extent[0],\n extent[3],\n ];\n }\n transformFn(coordinates, coordinates, 2);\n const xs = [];\n const ys = [];\n for (let i = 0, l = coordinates.length; i < l; i += 2) {\n xs.push(coordinates[i]);\n ys.push(coordinates[i + 1]);\n }\n return _boundingExtentXYs(xs, ys, dest);\n}\n\n/**\n * Modifies the provided extent in-place to be within the real world\n * extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./proj/Projection.js\").default} projection Projection\n * @return {Extent} The extent within the real world extent.\n */\nexport function wrapX(extent, projection) {\n const projectionExtent = projection.getExtent();\n const center = getCenter(extent);\n if (\n projection.canWrapX() &&\n (center[0] < projectionExtent[0] || center[0] >= projectionExtent[2])\n ) {\n const worldWidth = getWidth(projectionExtent);\n const worldsAway = Math.floor(\n (center[0] - projectionExtent[0]) / worldWidth,\n );\n const offset = worldsAway * worldWidth;\n extent[0] -= offset;\n extent[2] -= offset;\n }\n return extent;\n}\n\n/**\n * Fits the extent to the real world\n *\n * If the extent does not cross the anti meridian, this will return the extent in an array\n * If the extent crosses the anti meridian, the extent will be sliced, so each part fits within the\n * real world\n *\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./proj/Projection.js\").default} projection Projection\n * @param {boolean} [multiWorld] Return all worlds\n * @return {Array} The extent within the real world extent.\n */\nexport function wrapAndSliceX(extent, projection, multiWorld) {\n if (projection.canWrapX()) {\n const projectionExtent = projection.getExtent();\n\n if (!isFinite(extent[0]) || !isFinite(extent[2])) {\n return [[projectionExtent[0], extent[1], projectionExtent[2], extent[3]]];\n }\n\n wrapX(extent, projection);\n const worldWidth = getWidth(projectionExtent);\n\n if (getWidth(extent) > worldWidth && !multiWorld) {\n // the extent wraps around on itself\n return [[projectionExtent[0], extent[1], projectionExtent[2], extent[3]]];\n }\n if (extent[0] < projectionExtent[0]) {\n // the extent crosses the anti meridian, so it needs to be sliced\n return [\n [extent[0] + worldWidth, extent[1], projectionExtent[2], extent[3]],\n [projectionExtent[0], extent[1], extent[2], extent[3]],\n ];\n }\n if (extent[2] > projectionExtent[2]) {\n // the extent crosses the anti meridian, so it needs to be sliced\n return [\n [extent[0], extent[1], projectionExtent[2], extent[3]],\n [projectionExtent[0], extent[1], extent[2] - worldWidth, extent[3]],\n ];\n }\n }\n\n return [extent];\n}\n\n/**\n * Subtract several rectangles from a base rectangle. Returns a set of disjoint\n * rectangles that together cover the base rectangle minus the union of the\n * subtracted rectangles, by repeatedly applying {@link module:ol/extent.getDifference}.\n * @param {Extent} base Base rectangle.\n * @param {Array} subtract Rectangles to subtract.\n * @return {Array} Remainder rectangles.\n */\nexport function subtractExtents(base, subtract) {\n let remainder = [base];\n for (let i = 0, ii = subtract.length; i < ii && remainder.length > 0; ++i) {\n /** @type {Array} */\n const next = [];\n for (let j = 0, jj = remainder.length; j < jj; ++j) {\n next.push(...getDifference(remainder[j], subtract[i]));\n }\n remainder = next;\n }\n return remainder;\n}\n","/**\n * @module ol/math\n */\n\n/**\n * Takes a number and clamps it to within the provided bounds.\n * @param {number} value The input number.\n * @param {number} min The minimum value to return.\n * @param {number} max The maximum value to return.\n * @return {number} The input number if it is within bounds, or the nearest\n * number within the bounds.\n */\nexport function clamp(value, min, max) {\n return Math.min(Math.max(value, min), max);\n}\n\n/**\n * Returns the square of the closest distance between the point (x, y) and the\n * line segment (x1, y1) to (x2, y2).\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredSegmentDistance(x, y, x1, y1, x2, y2) {\n const dx = x2 - x1;\n const dy = y2 - y1;\n if (dx !== 0 || dy !== 0) {\n const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n if (t > 1) {\n x1 = x2;\n y1 = y2;\n } else if (t > 0) {\n x1 += dx * t;\n y1 += dy * t;\n }\n }\n return squaredDistance(x, y, x1, y1);\n}\n\n/**\n * Returns the square of the distance between the points (x1, y1) and (x2, y2).\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredDistance(x1, y1, x2, y2) {\n const dx = x2 - x1;\n const dy = y2 - y1;\n return dx * dx + dy * dy;\n}\n\n/**\n * Solves system of linear equations using Gaussian elimination method.\n *\n * @param {Array>} mat Augmented matrix (n x n + 1 column)\n * in row-major order.\n * @return {Array|null} The resulting vector.\n */\nexport function solveLinearSystem(mat) {\n const n = mat.length;\n\n for (let i = 0; i < n; i++) {\n // Find max in the i-th column (ignoring i - 1 first rows)\n let maxRow = i;\n let maxEl = Math.abs(mat[i][i]);\n for (let r = i + 1; r < n; r++) {\n const absValue = Math.abs(mat[r][i]);\n if (absValue > maxEl) {\n maxEl = absValue;\n maxRow = r;\n }\n }\n\n if (maxEl === 0) {\n return null; // matrix is singular\n }\n\n // Swap max row with i-th (current) row\n const tmp = mat[maxRow];\n mat[maxRow] = mat[i];\n mat[i] = tmp;\n\n // Subtract the i-th row to make all the remaining rows 0 in the i-th column\n for (let j = i + 1; j < n; j++) {\n const coef = -mat[j][i] / mat[i][i];\n for (let k = i; k < n + 1; k++) {\n if (i == k) {\n mat[j][k] = 0;\n } else {\n mat[j][k] += coef * mat[i][k];\n }\n }\n }\n }\n\n // Solve Ax=b for upper triangular matrix A (mat)\n const x = new Array(n);\n for (let l = n - 1; l >= 0; l--) {\n x[l] = mat[l][n] / mat[l][l];\n for (let m = l - 1; m >= 0; m--) {\n mat[m][n] -= mat[m][l] * x[l];\n }\n }\n return x;\n}\n\n/**\n * Converts radians to to degrees.\n *\n * @param {number} angleInRadians Angle in radians.\n * @return {number} Angle in degrees.\n */\nexport function toDegrees(angleInRadians) {\n return (angleInRadians * 180) / Math.PI;\n}\n\n/**\n * Converts degrees to radians.\n *\n * @param {number} angleInDegrees Angle in degrees.\n * @return {number} Angle in radians.\n */\nexport function toRadians(angleInDegrees) {\n return (angleInDegrees * Math.PI) / 180;\n}\n\n/**\n * Returns the modulo of a / b, depending on the sign of b.\n *\n * @param {number} a Dividend.\n * @param {number} b Divisor.\n * @return {number} Modulo.\n */\nexport function modulo(a, b) {\n const r = a % b;\n return r * b < 0 ? r + b : r;\n}\n\n/**\n * Calculates the linearly interpolated value of x between a and b.\n *\n * @param {number} a Number\n * @param {number} b Number\n * @param {number} x Value to be interpolated.\n * @return {number} Interpolated value.\n */\nexport function lerp(a, b, x) {\n return a + x * (b - a);\n}\n\n/**\n * Returns a number with a limited number of decimal digits.\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The input number with a limited number of decimal digits.\n */\nexport function toFixed(n, decimals) {\n const factor = Math.pow(10, decimals);\n return Math.round(n * factor) / factor;\n}\n\n/**\n * Rounds a number to the nearest integer value considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The nearest integer.\n */\nexport function round(n, decimals) {\n return Math.round(toFixed(n, decimals));\n}\n\n/**\n * Rounds a number to the next smaller integer considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The next smaller integer.\n */\nexport function floor(n, decimals) {\n return Math.floor(toFixed(n, decimals));\n}\n\n/**\n * Rounds a number to the next bigger integer considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The next bigger integer.\n */\nexport function ceil(n, decimals) {\n return Math.ceil(toFixed(n, decimals));\n}\n\n/**\n * Wraps a number between some minimum and maximum values.\n * @param {number} n The number to wrap.\n * @param {number} min The minimum of the range (inclusive).\n * @param {number} max The maximum of the range (exclusive).\n * @return {number} The wrapped number.\n */\nexport function wrap(n, min, max) {\n if (n >= min && n < max) {\n return n;\n }\n const range = max - min;\n return ((((n - min) % range) + range) % range) + min;\n}\n","/**\n * @module ol/sphere\n */\nimport {toDegrees, toRadians} from './math.js';\n\n/**\n * Object literal with options for the {@link getLength} or {@link getArea}\n * functions.\n * @typedef {Object} SphereMetricOptions\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857']\n * Projection of the geometry. By default, the geometry is assumed to be in\n * Web Mercator.\n * @property {number} [radius=6371008.8] Sphere radius. By default, the\n * [mean Earth radius](https://en.wikipedia.org/wiki/Earth_radius#Mean_radius)\n * for the WGS84 ellipsoid is used.\n */\n\n/**\n * The mean Earth radius (1/3 * (2a + b)) for the WGS84 ellipsoid.\n * https://en.wikipedia.org/wiki/Earth_radius#Mean_radius\n * @type {number}\n */\nexport const DEFAULT_RADIUS = 6371008.8;\n\n/**\n * Get the great circle distance (in meters) between two geographic coordinates.\n * @param {Array} c1 Starting coordinate.\n * @param {Array} c2 Ending coordinate.\n * @param {number} [radius] The sphere radius to use. Defaults to the Earth's\n * mean radius using the WGS84 ellipsoid.\n * @return {number} The great circle distance between the points (in meters).\n * @api\n */\nexport function getDistance(c1, c2, radius) {\n radius = radius || DEFAULT_RADIUS;\n const lat1 = toRadians(c1[1]);\n const lat2 = toRadians(c2[1]);\n const deltaLatBy2 = (lat2 - lat1) / 2;\n const deltaLonBy2 = toRadians(c2[0] - c1[0]) / 2;\n const a =\n Math.sin(deltaLatBy2) * Math.sin(deltaLatBy2) +\n Math.sin(deltaLonBy2) *\n Math.sin(deltaLonBy2) *\n Math.cos(lat1) *\n Math.cos(lat2);\n return 2 * radius * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n}\n\n/**\n * Get the cumulative great circle length of linestring coordinates (geographic).\n * @param {Array} coordinates Linestring coordinates.\n * @param {number} radius The sphere radius to use.\n * @return {number} The length (in meters).\n */\nfunction getLengthInternal(coordinates, radius) {\n let length = 0;\n for (let i = 0, ii = coordinates.length; i < ii - 1; ++i) {\n length += getDistance(coordinates[i], coordinates[i + 1], radius);\n }\n return length;\n}\n\n/**\n * Get the spherical length of a geometry. This length is the sum of the\n * great circle distances between coordinates. For polygons, the length is\n * the sum of all rings. For points, the length is zero. For multi-part\n * geometries, the length is the sum of the length of each part.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions} [options] Options for the\n * length calculation. By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical length (in meters).\n * @api\n */\nexport function getLength(geometry, options) {\n options = options || {};\n const radius = options.radius || DEFAULT_RADIUS;\n const projection = options.projection || 'EPSG:3857';\n const type = geometry.getType();\n if (type !== 'GeometryCollection') {\n geometry = geometry.clone().transform(projection, 'EPSG:4326');\n }\n let length = 0;\n let coordinates, coords, i, ii, j, jj;\n switch (type) {\n case 'Point':\n case 'MultiPoint': {\n break;\n }\n case 'LineString':\n case 'LinearRing': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n length = getLengthInternal(coordinates, radius);\n break;\n }\n case 'MultiLineString':\n case 'Polygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n length += getLengthInternal(coordinates[i], radius);\n }\n break;\n }\n case 'MultiPolygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n coords = coordinates[i];\n for (j = 0, jj = coords.length; j < jj; ++j) {\n length += getLengthInternal(coords[j], radius);\n }\n }\n break;\n }\n case 'GeometryCollection': {\n const geometries =\n /** @type {import(\"./geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n length += getLength(geometries[i], options);\n }\n break;\n }\n default: {\n throw new Error('Unsupported geometry type: ' + type);\n }\n }\n return length;\n}\n\n/**\n * Returns the spherical area for a list of coordinates.\n *\n * [Reference](https://trs.jpl.nasa.gov/handle/2014/40409)\n * Robert. G. Chamberlain and William H. Duquette, \"Some Algorithms for\n * Polygons on a Sphere\", JPL Publication 07-03, Jet Propulsion\n * Laboratory, Pasadena, CA, June 2007\n *\n * @param {Array} coordinates List of coordinates of a linear\n * ring. If the ring is oriented clockwise, the area will be positive,\n * otherwise it will be negative.\n * @param {number} radius The sphere radius.\n * @return {number} Area (in square meters).\n */\nfunction getAreaInternal(coordinates, radius) {\n let area = 0;\n const len = coordinates.length;\n let x1 = coordinates[len - 1][0];\n let y1 = coordinates[len - 1][1];\n for (let i = 0; i < len; i++) {\n const x2 = coordinates[i][0];\n const y2 = coordinates[i][1];\n area +=\n toRadians(x2 - x1) *\n (2 + Math.sin(toRadians(y1)) + Math.sin(toRadians(y2)));\n x1 = x2;\n y1 = y2;\n }\n return (area * radius * radius) / 2.0;\n}\n\n/**\n * Get the spherical area of a geometry. This is the area (in meters) assuming\n * that polygon edges are segments of great circles on a sphere.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions} [options] Options for the area\n * calculation. By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical area (in square meters).\n * @api\n */\nexport function getArea(geometry, options) {\n options = options || {};\n const radius = options.radius || DEFAULT_RADIUS;\n const projection = options.projection || 'EPSG:3857';\n const type = geometry.getType();\n if (type !== 'GeometryCollection') {\n geometry = geometry.clone().transform(projection, 'EPSG:4326');\n }\n let area = 0;\n let coordinates, coords, i, ii, j, jj;\n switch (type) {\n case 'Point':\n case 'MultiPoint':\n case 'LineString':\n case 'MultiLineString':\n case 'LinearRing': {\n break;\n }\n case 'Polygon': {\n coordinates = /** @type {import(\"./geom/Polygon.js\").default} */ (\n geometry\n ).getCoordinates();\n area = Math.abs(getAreaInternal(coordinates[0], radius));\n for (i = 1, ii = coordinates.length; i < ii; ++i) {\n area -= Math.abs(getAreaInternal(coordinates[i], radius));\n }\n break;\n }\n case 'MultiPolygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n coords = coordinates[i];\n area += Math.abs(getAreaInternal(coords[0], radius));\n for (j = 1, jj = coords.length; j < jj; ++j) {\n area -= Math.abs(getAreaInternal(coords[j], radius));\n }\n }\n break;\n }\n case 'GeometryCollection': {\n const geometries =\n /** @type {import(\"./geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n area += getArea(geometries[i], options);\n }\n break;\n }\n default: {\n throw new Error('Unsupported geometry type: ' + type);\n }\n }\n return area;\n}\n\n/**\n * Returns the coordinate at the given distance and bearing from `c1`.\n *\n * @param {import(\"./coordinate.js\").Coordinate} c1 The origin point (`[lon, lat]` in degrees).\n * @param {number} distance The great-circle distance between the origin\n * point and the target point.\n * @param {number} bearing The bearing (in radians).\n * @param {number} [radius] The sphere radius to use. Defaults to the Earth's\n * mean radius using the WGS84 ellipsoid.\n * @return {import(\"./coordinate.js\").Coordinate} The target point.\n */\nexport function offset(c1, distance, bearing, radius) {\n radius = radius || DEFAULT_RADIUS;\n const lat1 = toRadians(c1[1]);\n const lon1 = toRadians(c1[0]);\n const dByR = distance / radius;\n const lat = Math.asin(\n Math.sin(lat1) * Math.cos(dByR) +\n Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing),\n );\n const lon =\n lon1 +\n Math.atan2(\n Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),\n Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat),\n );\n return [toDegrees(lon), toDegrees(lat)];\n}\n","/**\n * @module ol/console\n */\n\n/**\n * @typedef {'info'|'warn'|'error'|'none'} Level\n */\n\n/**\n * @type {Object}\n */\nconst levels = {\n info: 1,\n warn: 2,\n error: 3,\n none: 4,\n};\n\n/**\n * @type {number}\n */\nlet level = levels.info;\n\n/**\n * Set the logging level. By default, the level is set to 'info' and all\n * messages will be logged. Set to 'warn' to only display warnings and errors.\n * Set to 'error' to only display errors. Set to 'none' to silence all messages.\n *\n * @param {Level} l The new level.\n */\nexport function setLevel(l) {\n level = levels[l];\n}\n\n/**\n * @param {...any} args Arguments to log\n */\nexport function log(...args) {\n if (level > levels.info) {\n return;\n }\n console.log(...args); // eslint-disable-line no-console\n}\n\n/**\n * @param {...any} args Arguments to log\n */\nexport function warn(...args) {\n if (level > levels.warn) {\n return;\n }\n console.warn(...args); // eslint-disable-line no-console\n}\n\n/**\n * @param {...any} args Arguments to log\n */\nexport function error(...args) {\n if (level > levels.error) {\n return;\n }\n console.error(...args); // eslint-disable-line no-console\n}\n","/**\n * @module ol/coordinate\n */\nimport {getWidth} from './extent.js';\nimport {clamp, modulo, toFixed} from './math.js';\nimport {padNumber} from './string.js';\n\n/**\n * An array of numbers representing an `xy`, `xyz` or `xyzm` coordinate.\n * Example: `[16, 48]`.\n * @typedef {Array} Coordinate\n * @api\n */\n\n/**\n * A function that takes a {@link module:ol/coordinate~Coordinate} and\n * transforms it into a `{string}`.\n *\n * @typedef {function((Coordinate|undefined)): string} CoordinateFormat\n * @api\n */\n\n/**\n * Add `delta` to `coordinate`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n * import {add} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * add(coord, [-2, 4]);\n * // coord is now [5.85, 51.983333]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {Coordinate} delta Delta.\n * @return {Coordinate} The input coordinate adjusted by\n * the given delta.\n * @api\n */\nexport function add(coordinate, delta) {\n coordinate[0] += +delta[0];\n coordinate[1] += +delta[1];\n return coordinate;\n}\n\n/**\n * Calculates the point closest to the passed coordinate on the passed circle.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {import(\"./geom/Circle.js\").default} circle The circle.\n * @return {Coordinate} Closest point on the circumference.\n */\nexport function closestOnCircle(coordinate, circle) {\n const r = circle.getRadius();\n const center = circle.getCenter();\n const x0 = center[0];\n const y0 = center[1];\n const x1 = coordinate[0];\n const y1 = coordinate[1];\n\n let dx = x1 - x0;\n const dy = y1 - y0;\n if (dx === 0 && dy === 0) {\n dx = 1;\n }\n const d = Math.sqrt(dx * dx + dy * dy);\n\n const x = x0 + (r * dx) / d;\n const y = y0 + (r * dy) / d;\n\n return [x, y];\n}\n\n/**\n * Calculates the point closest to the passed coordinate on the passed segment.\n * This is the foot of the perpendicular of the coordinate to the segment when\n * the foot is on the segment, or the closest segment coordinate when the foot\n * is outside the segment.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {Array} segment The two coordinates\n * of the segment.\n * @return {Coordinate} The foot of the perpendicular of\n * the coordinate to the segment.\n */\nexport function closestOnSegment(coordinate, segment) {\n const x0 = coordinate[0];\n const y0 = coordinate[1];\n const start = segment[0];\n const end = segment[1];\n const x1 = start[0];\n const y1 = start[1];\n const x2 = end[0];\n const y2 = end[1];\n const dx = x2 - x1;\n const dy = y2 - y1;\n const along =\n dx === 0 && dy === 0\n ? 0\n : (dx * (x0 - x1) + dy * (y0 - y1)) / (dx * dx + dy * dy || 0);\n let x, y;\n if (along <= 0) {\n x = x1;\n y = y1;\n } else if (along >= 1) {\n x = x2;\n y = y2;\n } else {\n x = x1 + along * dx;\n y = y1 + along * dy;\n }\n return [x, y];\n}\n\n/**\n * Returns a {@link module:ol/coordinate~CoordinateFormat} function that can be\n * used to format\n * a {Coordinate} to a string.\n *\n * Example without specifying the fractional digits:\n *\n * import {createStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const stringifyFunc = createStringXY();\n * const out = stringifyFunc(coord);\n * // out is now '8, 48'\n *\n * Example with explicitly specifying 2 fractional digits:\n *\n * import {createStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const stringifyFunc = createStringXY(2);\n * const out = stringifyFunc(coord);\n * // out is now '7.85, 47.98'\n *\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {CoordinateFormat} Coordinate format.\n * @api\n */\nexport function createStringXY(fractionDigits) {\n return (\n /**\n * @param {Coordinate} coordinate Coordinate.\n * @return {string} String XY.\n */\n function (coordinate) {\n return toStringXY(coordinate, fractionDigits);\n }\n );\n}\n\n/**\n * @param {string} hemispheres Hemispheres.\n * @param {number} degrees Degrees.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} String.\n */\nexport function degreesToStringHDMS(hemispheres, degrees, fractionDigits) {\n const normalizedDegrees = modulo(degrees + 180, 360) - 180;\n const x = Math.abs(3600 * normalizedDegrees);\n const decimals = fractionDigits || 0;\n\n let deg = Math.floor(x / 3600);\n let min = Math.floor((x - deg * 3600) / 60);\n let sec = toFixed(x - deg * 3600 - min * 60, decimals);\n\n if (sec >= 60) {\n sec = 0;\n min += 1;\n }\n\n if (min >= 60) {\n min = 0;\n deg += 1;\n }\n\n let hdms = deg + '\\u00b0';\n if (min !== 0 || sec !== 0) {\n hdms += ' ' + padNumber(min, 2) + '\\u2032';\n }\n if (sec !== 0) {\n hdms += ' ' + padNumber(sec, 2, decimals) + '\\u2033';\n }\n if (normalizedDegrees !== 0) {\n hdms += ' ' + hemispheres.charAt(normalizedDegrees < 0 ? 1 : 0);\n }\n\n return hdms;\n}\n\n/**\n * Transforms the given {@link module:ol/coordinate~Coordinate} to a string\n * using the given string template. The strings `{x}` and `{y}` in the template\n * will be replaced with the first and second coordinate values respectively.\n *\n * Example without specifying the fractional digits:\n *\n * import {format} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const template = 'Coordinate is ({x}|{y}).';\n * const out = format(coord, template);\n * // out is now 'Coordinate is (8|48).'\n *\n * Example explicitly specifying the fractional digits:\n *\n * import {format} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const template = 'Coordinate is ({x}|{y}).';\n * const out = format(coord, template, 2);\n * // out is now 'Coordinate is (7.85|47.98).'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {string} template A template string with `{x}` and `{y}` placeholders\n * that will be replaced by first and second coordinate values.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} Formatted coordinate.\n * @api\n */\nexport function format(coordinate, template, fractionDigits) {\n if (coordinate) {\n return template\n .replace('{x}', coordinate[0].toFixed(fractionDigits))\n .replace('{y}', coordinate[1].toFixed(fractionDigits));\n }\n return '';\n}\n\n/**\n * @param {Coordinate} coordinate1 First coordinate.\n * @param {Coordinate} coordinate2 Second coordinate.\n * @return {boolean} The two coordinates are equal.\n */\nexport function equals(coordinate1, coordinate2) {\n let equals = true;\n for (let i = coordinate1.length - 1; i >= 0; --i) {\n if (coordinate1[i] != coordinate2[i]) {\n equals = false;\n break;\n }\n }\n return equals;\n}\n\n/**\n * Rotate `coordinate` by `angle`. `coordinate` is modified in place and\n * returned by the function.\n *\n * Example:\n *\n * import {rotate} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const rotateRadians = Math.PI / 2; // 90 degrees\n * rotate(coord, rotateRadians);\n * // coord is now [-47.983333, 7.85]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} angle Angle in radian.\n * @return {Coordinate} Coordinate.\n * @api\n */\nexport function rotate(coordinate, angle) {\n const cosAngle = Math.cos(angle);\n const sinAngle = Math.sin(angle);\n const x = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n const y = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n coordinate[0] = x;\n coordinate[1] = y;\n return coordinate;\n}\n\n/**\n * Scale `coordinate` by `scale`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n * import {scale as scaleCoordinate} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const scale = 1.2;\n * scaleCoordinate(coord, scale);\n * // coord is now [9.42, 57.5799996]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} scale Scale factor.\n * @return {Coordinate} Coordinate.\n */\nexport function scale(coordinate, scale) {\n coordinate[0] *= scale;\n coordinate[1] *= scale;\n return coordinate;\n}\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Squared distance between coord1 and coord2.\n */\nexport function squaredDistance(coord1, coord2) {\n const dx = coord1[0] - coord2[0];\n const dy = coord1[1] - coord2[1];\n return dx * dx + dy * dy;\n}\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Distance between coord1 and coord2.\n */\nexport function distance(coord1, coord2) {\n return Math.sqrt(squaredDistance(coord1, coord2));\n}\n\n/**\n * Calculate the squared distance from a coordinate to a line segment.\n *\n * @param {Coordinate} coordinate Coordinate of the point.\n * @param {Array} segment Line segment (2\n * coordinates).\n * @return {number} Squared distance from the point to the line segment.\n */\nexport function squaredDistanceToSegment(coordinate, segment) {\n return squaredDistance(coordinate, closestOnSegment(coordinate, segment));\n}\n\n/**\n * Format a geographic coordinate with the hemisphere, degrees, minutes, and\n * seconds.\n *\n * Example without specifying fractional digits:\n *\n * import {toStringHDMS} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringHDMS(coord);\n * // out is now '47° 58′ 60″ N 7° 50′ 60″ E'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n * import {toStringHDMS} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringHDMS(coord, 1);\n * // out is now '47° 58′ 60.0″ N 7° 50′ 60.0″ E'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} Hemisphere, degrees, minutes and seconds.\n * @api\n */\nexport function toStringHDMS(coordinate, fractionDigits) {\n if (coordinate) {\n return (\n degreesToStringHDMS('NS', coordinate[1], fractionDigits) +\n ' ' +\n degreesToStringHDMS('EW', coordinate[0], fractionDigits)\n );\n }\n return '';\n}\n\n/**\n * Format a coordinate as a comma delimited string.\n *\n * Example without specifying fractional digits:\n *\n * import {toStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringXY(coord);\n * // out is now '8, 48'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n * import {toStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringXY(coord, 1);\n * // out is now '7.8, 48.0'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} XY.\n * @api\n */\nexport function toStringXY(coordinate, fractionDigits) {\n return format(coordinate, '{x}, {y}', fractionDigits);\n}\n\n/**\n * Modifies the provided coordinate in-place to be within the real world\n * extent. The lower projection extent boundary is inclusive, the upper one\n * exclusive.\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {Coordinate} The coordinate within the real world extent.\n */\nexport function wrapX(coordinate, projection) {\n if (projection.canWrapX()) {\n const worldWidth = getWidth(projection.getExtent());\n const worldsAway = getWorldsAway(coordinate, projection, worldWidth);\n if (worldsAway) {\n coordinate[0] -= worldsAway * worldWidth;\n }\n }\n return coordinate;\n}\n/**\n * @param {Coordinate} coordinate Coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {number} [sourceExtentWidth] Width of the source extent.\n * @return {number} Offset in world widths.\n */\nexport function getWorldsAway(coordinate, projection, sourceExtentWidth) {\n const projectionExtent = projection.getExtent();\n let worldsAway = 0;\n if (\n projection.canWrapX() &&\n (coordinate[0] < projectionExtent[0] || coordinate[0] > projectionExtent[2])\n ) {\n sourceExtentWidth = sourceExtentWidth || getWidth(projectionExtent);\n worldsAway = Math.floor(\n (coordinate[0] - projectionExtent[0]) / sourceExtentWidth,\n );\n }\n return worldsAway;\n}\n\n/**\n * Compute the angle between p0pA and p0pB\n * @param {Coordinate} p0 Point 0\n * @param {Coordinate} pA Point A\n * @param {Coordinate} pB Point B\n * @return {number} a value in [0, 2PI]\n */\nexport function angleBetween(p0, pA, pB) {\n const lenA = Math.sqrt(\n (pA[0] - p0[0]) * (pA[0] - p0[0]) + (pA[1] - p0[1]) * (pA[1] - p0[1]),\n );\n const tangentA = [(pA[0] - p0[0]) / lenA, (pA[1] - p0[1]) / lenA];\n const orthoA = [-tangentA[1], tangentA[0]];\n const lenB = Math.sqrt(\n (pB[0] - p0[0]) * (pB[0] - p0[0]) + (pB[1] - p0[1]) * (pB[1] - p0[1]),\n );\n const tangentB = [(pB[0] - p0[0]) / lenB, (pB[1] - p0[1]) / lenB];\n\n // this angle can be clockwise or anticlockwise; hence the computation afterwards\n let angle =\n lenA === 0 || lenB === 0\n ? 0\n : Math.acos(\n clamp(tangentB[0] * tangentA[0] + tangentB[1] * tangentA[1], -1, 1),\n );\n angle = Math.max(angle, 0.00001); // avoid a zero angle otherwise this is detected as a line cap\n const isClockwise = tangentB[0] * orthoA[0] + tangentB[1] * orthoA[1] > 0;\n return !isClockwise ? Math.PI * 2 - angle : angle;\n}\n","/**\n * @module ol/proj/Units\n */\n\n/**\n * @typedef {'radians' | 'degrees' | 'ft' | 'm' | 'pixels' | 'tile-pixels' | 'us-ft'} Units\n * Projection units.\n */\n\n/**\n * See http://duff.ess.washington.edu/data/raster/drg/docs/geotiff.txt\n * @type {Object}\n */\nconst unitByCode = {\n '9001': 'm',\n '9002': 'ft',\n '9003': 'us-ft',\n '9101': 'radians',\n '9102': 'degrees',\n};\n\n/**\n * @param {number} code Unit code.\n * @return {Units} Units.\n */\nexport function fromCode(code) {\n return unitByCode[code];\n}\n\n/**\n * @typedef {Object} MetersPerUnitLookup\n * @property {number} radians Radians\n * @property {number} degrees Degrees\n * @property {number} ft Feet\n * @property {number} m Meters\n * @property {number} us-ft US feet\n */\n\n/**\n * Meters per unit lookup table.\n * @const\n * @type {MetersPerUnitLookup}\n * @api\n */\nexport const METERS_PER_UNIT = {\n // use the radius of the Normal sphere\n 'radians': 6370997 / (2 * Math.PI),\n 'degrees': (2 * Math.PI * 6370997) / 360,\n 'ft': 0.3048,\n 'm': 1,\n 'us-ft': 1200 / 3937,\n};\n","/**\n * @module ol/proj/Projection\n */\nimport {METERS_PER_UNIT} from './Units.js';\n\n/**\n * The function is called with a `number` view resolution and a\n * {@link module:ol/coordinate~Coordinate} as arguments, and returns the `number` resolution\n * in projection units at the passed coordinate.\n * @typedef {function(number, import(\"../coordinate.js\").Coordinate):number} GetPointResolution\n * @api\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} code The SRS identifier code, e.g. `EPSG:4326`.\n * @property {import(\"./Units.js\").Units} [units] Units. Required unless a\n * proj4 projection is defined for `code`.\n * @property {import(\"../extent.js\").Extent} [extent] The validity extent for the SRS.\n * @property {string} [axisOrientation='enu'] The axis orientation as specified in Proj4.\n * @property {boolean} [global=false] Whether the projection is valid for the whole globe.\n * @property {number} [metersPerUnit] The meters per unit for the SRS.\n * If not provided, the `units` are used to get the meters per unit from the {@link METERS_PER_UNIT}\n * lookup table.\n * @property {import(\"../extent.js\").Extent} [worldExtent] The world extent for the SRS.\n * @property {GetPointResolution} [getPointResolution]\n * Function to determine resolution at a point. The function is called with a\n * `number` view resolution and a {@link module:ol/coordinate~Coordinate} as arguments, and returns\n * the `number` resolution in projection units at the passed coordinate. If this is `undefined`,\n * the default {@link module:ol/proj.getPointResolution} function will be used.\n */\n\n/**\n * @classdesc\n * In most cases, you should not need to create instances of this class.\n * Instead, where projection information is required, you can use a string\n * projection code or identifier (e.g. `EPSG:4326`) instead of a projection\n * instance.\n *\n * The library includes support for transforming coordinates between the following\n * projections:\n *\n * WGS 84 / Geographic - Using codes `EPSG:4326`, `CRS:84`, `urn:ogc:def:crs:EPSG:6.6:4326`,\n * `urn:ogc:def:crs:OGC:1.3:CRS84`, `urn:ogc:def:crs:OGC:2:84`, `http://www.opengis.net/gml/srs/epsg.xml#4326`,\n * or `urn:x-ogc:def:crs:EPSG:4326`\n * WGS 84 / Spherical Mercator - Using codes `EPSG:3857`, `EPSG:102100`, `EPSG:102113`, `EPSG:900913`,\n * `urn:ogc:def:crs:EPSG:6.18:3:3857`, or `http://www.opengis.net/gml/srs/epsg.xml#3857`\n * WGS 84 / UTM zones - Using codes `EPSG:32601` through `EPSG:32660` for northern zones\n * and `EPSG:32701` through `EPSG:32760` for southern zones. Note that the built-in UTM transforms\n * are lower accuracy (with errors on the order of 0.1 m) than those that you might get in a\n * library like [proj4js](https://github.com/proj4js/proj4js).\n *\n * For additional projection support, or to use higher accuracy transforms than the built-in ones, you can use\n * the [proj4js](https://github.com/proj4js/proj4js) library. With `proj4js`, after adding any new projection\n * definitions, call the {@link module:ol/proj/proj4.register} function.\n *\n * You can use the {@link module:ol/proj.get} function to retrieve a projection instance\n * for one of the registered projections.\n *\n * @api\n */\nclass Projection {\n /**\n * @param {Options} options Projection options.\n */\n constructor(options) {\n /**\n * @private\n * @type {string}\n */\n this.code_ = options.code;\n\n /**\n * Units of projected coordinates. When set to `TILE_PIXELS`, a\n * `this.extent_` and `this.worldExtent_` must be configured properly for each\n * tile.\n * @private\n * @type {import(\"./Units.js\").Units}\n */\n this.units_ = /** @type {import(\"./Units.js\").Units} */ (options.units);\n\n /**\n * Validity extent of the projection in projected coordinates. For projections\n * with `TILE_PIXELS` units, this is the extent of the tile in\n * tile pixel space.\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.extent_ = options.extent !== undefined ? options.extent : null;\n\n /**\n * Extent of the world in EPSG:4326. For projections with\n * `TILE_PIXELS` units, this is the extent of the tile in\n * projected coordinate space.\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.worldExtent_ =\n options.worldExtent !== undefined ? options.worldExtent : null;\n\n /**\n * @private\n * @type {string}\n */\n this.axisOrientation_ =\n options.axisOrientation !== undefined ? options.axisOrientation : 'enu';\n\n /**\n * @private\n * @type {boolean}\n */\n this.global_ = options.global !== undefined ? options.global : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.canWrapX_ = !!(this.global_ && this.extent_);\n\n /**\n * @private\n * @type {GetPointResolution|undefined}\n */\n this.getPointResolutionFunc_ = options.getPointResolution;\n\n /**\n * @private\n * @type {import(\"../tilegrid/TileGrid.js\").default}\n */\n this.defaultTileGrid_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.metersPerUnit_ = options.metersPerUnit;\n }\n\n /**\n * @return {boolean} The projection is suitable for wrapping the x-axis\n */\n canWrapX() {\n return this.canWrapX_;\n }\n\n /**\n * Get the code for this projection, e.g. 'EPSG:4326'.\n * @return {string} Code.\n * @api\n */\n getCode() {\n return this.code_;\n }\n\n /**\n * Get the validity extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getExtent() {\n return this.extent_;\n }\n\n /**\n * Get the units of this projection.\n * @return {import(\"./Units.js\").Units} Units.\n * @api\n */\n getUnits() {\n return this.units_;\n }\n\n /**\n * Get the amount of meters per unit of this projection. If the projection is\n * not configured with `metersPerUnit` or a units identifier, the return is\n * `undefined`.\n * @return {number|undefined} Meters.\n * @api\n */\n getMetersPerUnit() {\n return this.metersPerUnit_ || METERS_PER_UNIT[this.units_];\n }\n\n /**\n * Get the world extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getWorldExtent() {\n return this.worldExtent_;\n }\n\n /**\n * Get the axis orientation of this projection.\n * Example values are:\n * enu - the default easting, northing, elevation.\n * neu - northing, easting, up - useful for \"lat/long\" geographic coordinates,\n * or south orientated transverse mercator.\n * wnu - westing, northing, up - some planetary coordinate systems have\n * \"west positive\" coordinate systems\n * @return {string} Axis orientation.\n * @api\n */\n getAxisOrientation() {\n return this.axisOrientation_;\n }\n\n /**\n * Is this projection a global projection which spans the whole world?\n * @return {boolean} Whether the projection is global.\n * @api\n */\n isGlobal() {\n return this.global_;\n }\n\n /**\n * Set if the projection is a global projection which spans the whole world\n * @param {boolean} global Whether the projection is global.\n * @api\n */\n setGlobal(global) {\n this.global_ = global;\n this.canWrapX_ = !!(global && this.extent_);\n }\n\n /**\n * @return {import(\"../tilegrid/TileGrid.js\").default} The default tile grid.\n */\n getDefaultTileGrid() {\n return this.defaultTileGrid_;\n }\n\n /**\n * @param {import(\"../tilegrid/TileGrid.js\").default} tileGrid The default tile grid.\n */\n setDefaultTileGrid(tileGrid) {\n this.defaultTileGrid_ = tileGrid;\n }\n\n /**\n * Set the validity extent for this projection.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\n setExtent(extent) {\n this.extent_ = extent;\n this.canWrapX_ = !!(this.global_ && extent);\n }\n\n /**\n * Set the world extent for this projection.\n * @param {import(\"../extent.js\").Extent} worldExtent World extent\n * [minlon, minlat, maxlon, maxlat].\n * @api\n */\n setWorldExtent(worldExtent) {\n this.worldExtent_ = worldExtent;\n }\n\n /**\n * Set the getPointResolution function (see {@link module:ol/proj.getPointResolution}\n * for this projection.\n * @param {function(number, import(\"../coordinate.js\").Coordinate):number} func Function\n * @api\n */\n setGetPointResolution(func) {\n this.getPointResolutionFunc_ = func;\n }\n\n /**\n * Get the custom point resolution function for this projection (if set).\n * @return {GetPointResolution|undefined} The custom point\n * resolution function (if set).\n */\n getPointResolutionFunc() {\n return this.getPointResolutionFunc_;\n }\n}\n\nexport default Projection;\n","/**\n * @module ol/proj/epsg3857\n */\nimport Projection from './Projection.js';\n\n/**\n * Radius of WGS84 sphere\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n/**\n * @const\n * @type {number}\n */\nexport const HALF_SIZE = Math.PI * RADIUS;\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const EXTENT = [-HALF_SIZE, -HALF_SIZE, HALF_SIZE, HALF_SIZE];\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const WORLD_EXTENT = [-180, -85, 180, 85];\n\n/**\n * Maximum safe value in y direction\n * @const\n * @type {number}\n */\nexport const MAX_SAFE_Y = RADIUS * Math.log(Math.tan(Math.PI / 2));\n\n/**\n * @classdesc\n * Projection object for web/spherical Mercator (EPSG:3857).\n */\nclass EPSG3857Projection extends Projection {\n /**\n * @param {string} code Code.\n */\n constructor(code) {\n super({\n code: code,\n units: 'm',\n extent: EXTENT,\n global: true,\n worldExtent: WORLD_EXTENT,\n getPointResolution: function (resolution, point) {\n return resolution / Math.cosh(point[1] / RADIUS);\n },\n });\n }\n}\n\n/**\n * Projections equal to EPSG:3857.\n *\n * @const\n * @type {Array}\n */\nexport const PROJECTIONS = [\n new EPSG3857Projection('EPSG:3857'),\n new EPSG3857Projection('EPSG:102100'),\n new EPSG3857Projection('EPSG:102113'),\n new EPSG3857Projection('EPSG:900913'),\n new EPSG3857Projection('http://www.opengis.net/def/crs/EPSG/0/3857'),\n new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857'),\n];\n\n/**\n * Transformation from EPSG:4326 to EPSG:3857.\n *\n * @param {Array} input Input array of coordinate values.\n * @param {Array} [output] Output array of coordinate values.\n * @param {number} [dimension] Dimension (default is `2`).\n * @param {number} [stride] Stride (default is `dimension`).\n * @return {Array} Output array of coordinate values.\n */\nexport function fromEPSG4326(input, output, dimension, stride) {\n const length = input.length;\n dimension = dimension > 1 ? dimension : 2;\n stride = stride ?? dimension;\n if (output === undefined) {\n if (dimension > 2) {\n // preserve values beyond second dimension\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += stride) {\n output[i] = (HALF_SIZE * input[i]) / 180;\n let y = RADIUS * Math.log(Math.tan((Math.PI * (+input[i + 1] + 90)) / 360));\n if (y > MAX_SAFE_Y) {\n y = MAX_SAFE_Y;\n } else if (y < -MAX_SAFE_Y) {\n y = -MAX_SAFE_Y;\n }\n output[i + 1] = y;\n }\n return output;\n}\n\n/**\n * Transformation from EPSG:3857 to EPSG:4326.\n *\n * @param {Array} input Input array of coordinate values.\n * @param {Array} [output] Output array of coordinate values.\n * @param {number} [dimension] Dimension (default is `2`).\n * @param {number} [stride] Stride (default is `dimension`).\n * @return {Array} Output array of coordinate values.\n */\nexport function toEPSG4326(input, output, dimension, stride) {\n const length = input.length;\n dimension = dimension > 1 ? dimension : 2;\n stride = stride ?? dimension;\n if (output === undefined) {\n if (dimension > 2) {\n // preserve values beyond second dimension\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += stride) {\n output[i] = (180 * input[i]) / HALF_SIZE;\n output[i + 1] =\n (360 * Math.atan(Math.exp(input[i + 1] / RADIUS))) / Math.PI - 90;\n }\n return output;\n}\n","/**\n * @module ol/proj/epsg4326\n */\nimport Projection from './Projection.js';\n\n/**\n * Semi-major radius of the WGS84 ellipsoid.\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n/**\n * Extent of the EPSG:4326 projection which is the whole world.\n *\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const EXTENT = [-180, -90, 180, 90];\n\n/**\n * @const\n * @type {number}\n */\nexport const METERS_PER_UNIT = (Math.PI * RADIUS) / 180;\n\n/**\n * @classdesc\n * Projection object for WGS84 geographic coordinates (EPSG:4326).\n *\n * Note that OpenLayers does not strictly comply with the EPSG definition.\n * The EPSG registry defines 4326 as a CRS for Latitude,Longitude (y,x).\n * OpenLayers treats EPSG:4326 as a pseudo-projection, with x,y coordinates.\n */\nclass EPSG4326Projection extends Projection {\n /**\n * @param {string} code Code.\n * @param {string} [axisOrientation] Axis orientation.\n */\n constructor(code, axisOrientation) {\n super({\n code: code,\n units: 'degrees',\n extent: EXTENT,\n axisOrientation: axisOrientation,\n global: true,\n metersPerUnit: METERS_PER_UNIT,\n worldExtent: EXTENT,\n });\n }\n}\n\n/**\n * Projections equal to EPSG:4326.\n *\n * @const\n * @type {Array}\n */\nexport const PROJECTIONS = [\n new EPSG4326Projection('CRS:84'),\n new EPSG4326Projection('EPSG:4326', 'neu'),\n new EPSG4326Projection('urn:ogc:def:crs:OGC:1.3:CRS84'),\n new EPSG4326Projection('urn:ogc:def:crs:OGC:2:84'),\n new EPSG4326Projection('http://www.opengis.net/def/crs/OGC/1.3/CRS84'),\n new EPSG4326Projection('http://www.opengis.net/gml/srs/epsg.xml#4326', 'neu'),\n new EPSG4326Projection('http://www.opengis.net/def/crs/EPSG/0/4326', 'neu'),\n];\n","/**\n * @module ol/proj/projections\n */\n\n/**\n * @type {Object}\n */\nlet cache = {};\n\n/**\n * Clear the projections cache.\n */\nexport function clear() {\n cache = {};\n}\n\n/**\n * Get a cached projection by code.\n * @param {string} code The code for the projection.\n * @return {import(\"./Projection.js\").default|null} The projection (if cached).\n */\nexport function get(code) {\n return (\n cache[code] ||\n cache[code.replace(/urn:(x-)?ogc:def:crs:EPSG:(.*:)?(\\w+)$/, 'EPSG:$3')] ||\n null\n );\n}\n\n/**\n * Add a projection to the cache.\n * @param {string} code The projection code.\n * @param {import(\"./Projection.js\").default} projection The projection to cache.\n */\nexport function add(code, projection) {\n cache[code] = projection;\n}\n","/**\n * @module ol/proj/transforms\n */\nimport {isEmpty} from '../obj.js';\n\n/**\n * @private\n * @type {!Object>}\n */\nlet transforms = {};\n\n/**\n * Clear the transform cache.\n */\nexport function clear() {\n transforms = {};\n}\n\n/**\n * Registers a conversion function to convert coordinates from the source\n * projection to the destination projection.\n *\n * @param {import(\"./Projection.js\").default} source Source.\n * @param {import(\"./Projection.js\").default} destination Destination.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform.\n */\nexport function add(source, destination, transformFn) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n if (!(sourceCode in transforms)) {\n transforms[sourceCode] = {};\n }\n transforms[sourceCode][destinationCode] = transformFn;\n}\n\n/**\n * Unregisters the conversion function to convert coordinates from the source\n * projection to the destination projection. This method is used to clean up\n * cached transforms during testing.\n *\n * @param {import(\"./Projection.js\").default} source Source projection.\n * @param {import(\"./Projection.js\").default} destination Destination projection.\n * @return {import(\"../proj.js\").TransformFunction} transformFn The unregistered transform.\n */\nexport function remove(source, destination) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n const transform = transforms[sourceCode][destinationCode];\n delete transforms[sourceCode][destinationCode];\n if (isEmpty(transforms[sourceCode])) {\n delete transforms[sourceCode];\n }\n return transform;\n}\n\n/**\n * Get a transform given a source code and a destination code.\n * @param {string} sourceCode The code for the source projection.\n * @param {string} destinationCode The code for the destination projection.\n * @return {import(\"../proj.js\").TransformFunction|null} The transform function (if found).\n */\nexport function get(sourceCode, destinationCode) {\n if (sourceCode in transforms && destinationCode in transforms[sourceCode]) {\n return transforms[sourceCode][destinationCode];\n }\n return null;\n}\n","/**\n * @module ol/proj/utm\n */\n\n/**\n * Adapted from https://github.com/Turbo87/utm\n * Copyright (c) 2012-2017 Tobias Bieniek\n *\n * The functions here provide approximate transforms to and from UTM.\n * They are not appropriate for use beyond the validity extend of a UTM\n * zone, and the accuracy of the transform decreases toward the zone\n * edges.\n */\n\nimport {toDegrees, toRadians, wrap} from '../math.js';\nimport Projection from './Projection.js';\n\n/**\n * @typedef {Object} UTMZone\n * @property {number} number The zone number (1 - 60).\n * @property {boolean} north The northern hemisphere.\n */\n\nconst K0 = 0.9996;\n\nconst E = 0.00669438;\nconst E2 = E * E;\nconst E3 = E2 * E;\nconst E_P2 = E / (1 - E);\n\nconst SQRT_E = Math.sqrt(1 - E);\nconst _E = (1 - SQRT_E) / (1 + SQRT_E);\nconst _E2 = _E * _E;\nconst _E3 = _E2 * _E;\nconst _E4 = _E3 * _E;\nconst _E5 = _E4 * _E;\n\nconst M1 = 1 - E / 4 - (3 * E2) / 64 - (5 * E3) / 256;\nconst M2 = (3 * E) / 8 + (3 * E2) / 32 + (45 * E3) / 1024;\nconst M3 = (15 * E2) / 256 + (45 * E3) / 1024;\nconst M4 = (35 * E3) / 3072;\n\nconst P2 = (3 / 2) * _E - (27 / 32) * _E3 + (269 / 512) * _E5;\nconst P3 = (21 / 16) * _E2 - (55 / 32) * _E4;\nconst P4 = (151 / 96) * _E3 - (417 / 128) * _E5;\nconst P5 = (1097 / 512) * _E4;\n\nconst R = 6378137;\n\n/**\n * @param {number} easting Easting value of coordinate.\n * @param {number} northing Northing value of coordinate.\n * @param {UTMZone} zone The UTM zone.\n * @return {import(\"../coordinate.js\").Coordinate} The transformed coordinate.\n */\nfunction toLonLat(easting, northing, zone) {\n const x = easting - 500000;\n const y = zone.north ? northing : northing - 10000000;\n\n const m = y / K0;\n const mu = m / (R * M1);\n\n const pRad =\n mu +\n P2 * Math.sin(2 * mu) +\n P3 * Math.sin(4 * mu) +\n P4 * Math.sin(6 * mu) +\n P5 * Math.sin(8 * mu);\n\n const pSin = Math.sin(pRad);\n const pSin2 = pSin * pSin;\n\n const pCos = Math.cos(pRad);\n\n const pTan = pSin / pCos;\n const pTan2 = pTan * pTan;\n const pTan4 = pTan2 * pTan2;\n\n const epSin = 1 - E * pSin2;\n const epSinSqrt = Math.sqrt(1 - E * pSin2);\n\n const n = R / epSinSqrt;\n const r = (1 - E) / epSin;\n\n const c = E_P2 * pCos ** 2;\n const c2 = c * c;\n\n const d = x / (n * K0);\n const d2 = d * d;\n const d3 = d2 * d;\n const d4 = d3 * d;\n const d5 = d4 * d;\n const d6 = d5 * d;\n\n const latitude =\n pRad -\n (pTan / r) *\n (d2 / 2 - (d4 / 24) * (5 + 3 * pTan2 + 10 * c - 4 * c2 - 9 * E_P2)) +\n (d6 / 720) * (61 + 90 * pTan2 + 298 * c + 45 * pTan4 - 252 * E_P2 - 3 * c2);\n\n let longitude =\n (d -\n (d3 / 6) * (1 + 2 * pTan2 + c) +\n (d5 / 120) * (5 - 2 * c + 28 * pTan2 - 3 * c2 + 8 * E_P2 + 24 * pTan4)) /\n pCos;\n\n longitude = wrap(\n longitude + toRadians(zoneToCentralLongitude(zone.number)),\n -Math.PI,\n Math.PI,\n );\n\n return [toDegrees(longitude), toDegrees(latitude)];\n}\n\nconst MIN_LATITUDE = -80;\nconst MAX_LATITUDE = 84;\nconst MIN_LONGITUDE = -180;\nconst MAX_LONGITUDE = 180;\n\n/**\n * @param {number} longitude The longitude.\n * @param {number} latitude The latitude.\n * @param {UTMZone} zone The UTM zone.\n * @return {import('../coordinate.js').Coordinate} The UTM coordinate.\n */\nfunction fromLonLat(longitude, latitude, zone) {\n longitude = wrap(longitude, MIN_LONGITUDE, MAX_LONGITUDE);\n\n if (latitude < MIN_LATITUDE) {\n latitude = MIN_LATITUDE;\n } else if (latitude > MAX_LATITUDE) {\n latitude = MAX_LATITUDE;\n }\n\n const latRad = toRadians(latitude);\n const latSin = Math.sin(latRad);\n const latCos = Math.cos(latRad);\n\n const latTan = latSin / latCos;\n const latTan2 = latTan * latTan;\n const latTan4 = latTan2 * latTan2;\n\n const lonRad = toRadians(longitude);\n const centralLon = zoneToCentralLongitude(zone.number);\n const centralLonRad = toRadians(centralLon);\n\n const n = R / Math.sqrt(1 - E * latSin ** 2);\n const c = E_P2 * latCos ** 2;\n\n const a = latCos * wrap(lonRad - centralLonRad, -Math.PI, Math.PI);\n const a2 = a * a;\n const a3 = a2 * a;\n const a4 = a3 * a;\n const a5 = a4 * a;\n const a6 = a5 * a;\n\n const m =\n R *\n (M1 * latRad -\n M2 * Math.sin(2 * latRad) +\n M3 * Math.sin(4 * latRad) -\n M4 * Math.sin(6 * latRad));\n\n const easting =\n K0 *\n n *\n (a +\n (a3 / 6) * (1 - latTan2 + c) +\n (a5 / 120) * (5 - 18 * latTan2 + latTan4 + 72 * c - 58 * E_P2)) +\n 500000;\n\n let northing =\n K0 *\n (m +\n n *\n latTan *\n (a2 / 2 +\n (a4 / 24) * (5 - latTan2 + 9 * c + 4 * c ** 2) +\n (a6 / 720) * (61 - 58 * latTan2 + latTan4 + 600 * c - 330 * E_P2)));\n\n if (!zone.north) {\n northing += 10000000;\n }\n\n return [easting, northing];\n}\n\n/**\n * @param {number} zone The zone number.\n * @return {number} The central longitude in degrees.\n */\nfunction zoneToCentralLongitude(zone) {\n return (zone - 1) * 6 - 180 + 3;\n}\n\n/**\n * @type {Array}\n */\nconst epsgRegExes = [\n /^EPSG:(\\d+)$/,\n /^urn:ogc:def:crs:EPSG::(\\d+)$/,\n /^http:\\/\\/www\\.opengis\\.net\\/def\\/crs\\/EPSG\\/0\\/(\\d+)$/,\n];\n\n/**\n * @param {string} code The projection code.\n * @return {UTMZone|null} The UTM zone info (or null if not UTM).\n */\nexport function zoneFromCode(code) {\n let epsgId = 0;\n for (const re of epsgRegExes) {\n const match = code.match(re);\n if (match) {\n epsgId = parseInt(match[1]);\n break;\n }\n }\n if (!epsgId) {\n return null;\n }\n\n let number = 0;\n let north = false;\n if (epsgId > 32700 && epsgId < 32761) {\n number = epsgId - 32700;\n } else if (epsgId > 32600 && epsgId < 32661) {\n north = true;\n number = epsgId - 32600;\n }\n if (!number) {\n return null;\n }\n\n return {number, north};\n}\n\n/**\n * @param {function(number, number, UTMZone): import('../coordinate.js').Coordinate} transformer The transformer.\n * @param {UTMZone} zone The UTM zone.\n * @return {import('../proj.js').TransformFunction} The transform function.\n */\nfunction makeTransformFunction(transformer, zone) {\n return function (input, output, dimension, stride) {\n const length = input.length;\n dimension = dimension > 1 ? dimension : 2;\n stride = stride ?? dimension;\n if (!output) {\n if (dimension > 2) {\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += stride) {\n const x = input[i];\n const y = input[i + 1];\n const coord = transformer(x, y, zone);\n output[i] = coord[0];\n output[i + 1] = coord[1];\n }\n return output;\n };\n}\n\n/**\n * @param {string} code The projection code.\n * @return {import('./Projection.js').default|null} A projection or null if unable to create one.\n */\nexport function makeProjection(code) {\n const zone = zoneFromCode(code);\n if (!zone) {\n return null;\n }\n return new Projection({code, units: 'm'});\n}\n\n/**\n * @param {import('./Projection.js').default} projection The projection.\n * @return {import('../proj.js').Transforms|null} The transforms lookup or null if unable to handle projection.\n */\nexport function makeTransforms(projection) {\n const zone = zoneFromCode(projection.getCode());\n if (!zone) {\n return null;\n }\n\n return {\n forward: makeTransformFunction(fromLonLat, zone),\n inverse: makeTransformFunction(toLonLat, zone),\n };\n}\n","/**\n * @module ol/proj\n */\n\n/**\n * The ol/proj module stores:\n * a list of {@link module:ol/proj/Projection~Projection}\n * objects, one for each projection supported by the application\n * a list of transform functions needed to convert coordinates in one projection\n * into another.\n *\n * The static functions are the methods used to maintain these.\n * Each transform function can handle not only simple coordinate pairs, but also\n * large arrays of coordinates such as vector geometries.\n *\n * When loaded, the library adds projection objects for EPSG:4326 (WGS84\n * geographic coordinates) and EPSG:3857 (Web or Spherical Mercator, as used\n * for example by Bing Maps or OpenStreetMap), together with the relevant\n * transform functions.\n *\n * Additional transforms may be added by using the http://proj4js.org/\n * library (version 2.2 or later). You can use the full build supplied by\n * Proj4js, or create a custom build to support those projections you need; see\n * the Proj4js website for how to do this. You also need the Proj4js definitions\n * for the required projections. These definitions can be obtained from\n * https://spatialreference.org/, and are a JS function, so can be loaded in a\n * script tag (as in the examples) or pasted into your application.\n *\n * After all required projection definitions are added to proj4's registry (by\n * using `proj4.defs()`), simply call `register(proj4)` from the `ol/proj/proj4`\n * package. Existing transforms are not changed by this function. See\n * examples/wms-image-custom-proj for an example of this.\n *\n * Additional projection definitions can be registered with `proj4.defs()` any\n * time. Just make sure to call `register(proj4)` again; for example, with user-supplied data where you don't\n * know in advance what projections are needed, you can initially load minimal\n * support and then load whichever are requested.\n *\n * Note that Proj4js does not support projection extents. If you want to add\n * one for creating default tile grids, you can add it after the Projection\n * object has been created with `setExtent`, for example,\n * `get('EPSG:1234').setExtent(extent)`.\n *\n * In addition to Proj4js support, any transform functions can be added with\n * {@link module:ol/proj.addCoordinateTransforms}. To use this, you must first create\n * a {@link module:ol/proj/Projection~Projection} object for the new projection and add it with\n * {@link module:ol/proj.addProjection}. You can then add the forward and inverse\n * functions with {@link module:ol/proj.addCoordinateTransforms}. See\n * examples/wms-custom-proj for an example of this.\n *\n * Note that if no transforms are needed and you only need to define the\n * projection, just add a {@link module:ol/proj/Projection~Projection} with\n * {@link module:ol/proj.addProjection}. See examples/wms-no-proj for an example of\n * this.\n */\nimport {warn} from './console.js';\nimport {equals, getWorldsAway} from './coordinate.js';\nimport {applyTransform, getWidth} from './extent.js';\nimport {clamp, modulo} from './math.js';\nimport Projection from './proj/Projection.js';\nimport {METERS_PER_UNIT} from './proj/Units.js';\nimport {\n PROJECTIONS as EPSG3857_PROJECTIONS,\n fromEPSG4326,\n toEPSG4326,\n} from './proj/epsg3857.js';\nimport {PROJECTIONS as EPSG4326_PROJECTIONS} from './proj/epsg4326.js';\nimport {\n add as addProj,\n clear as clearProj,\n get as getProj,\n} from './proj/projections.js';\nimport {\n add as addTransformFunc,\n clear as clearTransformFuncs,\n get as getTransformFunc,\n} from './proj/transforms.js';\nimport {\n makeProjection as makeUTMProjection,\n makeTransforms as makeUTMTransforms,\n} from './proj/utm.js';\nimport {getDistance} from './sphere.js';\n\n/**\n * A projection as {@link module:ol/proj/Projection~Projection}, SRS identifier\n * string or undefined.\n * @typedef {Projection|string|undefined} ProjectionLike\n * @api\n */\n\n/**\n * @typedef {Object} Transforms\n * @property {TransformFunction} forward The forward transform (from geographic).\n * @property {TransformFunction} inverse The inverse transform (to geographic).\n */\n\n/**\n * @type {Array}\n */\nconst transformFactories = [makeUTMTransforms];\n\n/**\n * @type {Array}\n */\nconst projectionFactories = [makeUTMProjection];\n\n/**\n * A transform function accepts an array of input coordinate values, an optional\n * output array, and an optional dimension (default should be 2). The function\n * transforms the input coordinate values, populates the output array, and\n * returns the output array.\n *\n * @callback TransformFunction\n * @param {Array} input\n * @param {Array} [output]\n * @param {number} [dimension]\n * @param {number} [stride]\n * @return {Array}\n *\n * @api\n */\n\nexport {METERS_PER_UNIT};\n\nexport {Projection};\n\nlet showCoordinateWarning = true;\n\n/**\n * @param {boolean} [disable] Disable console info about `useGeographic()`\n */\nexport function disableCoordinateWarning(disable) {\n const hide = disable === undefined ? true : disable;\n showCoordinateWarning = !hide;\n}\n\n/**\n * @param {Array} input Input coordinate array.\n * @param {Array} [output] Output array of coordinate values.\n * @return {Array} Output coordinate array (new array, same coordinate\n * values).\n */\nexport function cloneTransform(input, output) {\n if (output !== undefined) {\n for (let i = 0, ii = input.length; i < ii; ++i) {\n output[i] = input[i];\n }\n output = output;\n } else {\n output = input.slice();\n }\n return output;\n}\n\n/**\n * @param {Array} input Input coordinate array.\n * @param {Array} [output] Output array of coordinate values.\n * @return {Array} Input coordinate array (same array as input).\n */\nexport function identityTransform(input, output) {\n if (output !== undefined && input !== output) {\n for (let i = 0, ii = input.length; i < ii; ++i) {\n output[i] = input[i];\n }\n input = output;\n }\n return input;\n}\n\n/**\n * Add a Projection object to the list of supported projections that can be\n * looked up by their code.\n *\n * @param {Projection} projection Projection instance.\n * @api\n */\nexport function addProjection(projection) {\n addProj(projection.getCode(), projection);\n addTransformFunc(projection, projection, cloneTransform);\n}\n\n/**\n * @param {Array} projections Projections.\n */\nexport function addProjections(projections) {\n projections.forEach(addProjection);\n}\n\n/**\n * Fetches a Projection object for the code specified.\n *\n * @param {ProjectionLike} projectionLike Either a code string which is\n * a combination of authority and identifier such as \"EPSG:4326\", or an\n * existing projection object, or undefined.\n * @return {Projection|null} Projection object, or null if not in list.\n * @api\n */\nexport function get(projectionLike) {\n if (!(typeof projectionLike === 'string')) {\n return projectionLike;\n }\n const projection = getProj(projectionLike);\n if (projection) {\n return projection;\n }\n for (const makeProjection of projectionFactories) {\n const projection = makeProjection(projectionLike);\n if (projection) {\n return projection;\n }\n }\n return null;\n}\n\n/**\n * Get the resolution of the point in degrees or distance units.\n * For projections with degrees as the unit this will simply return the\n * provided resolution. For other projections the point resolution is\n * by default estimated by transforming the `point` pixel to EPSG:4326,\n * measuring its width and height on the normal sphere,\n * and taking the average of the width and height.\n * A custom function can be provided for a specific projection, either\n * by setting the `getPointResolution` option in the\n * {@link module:ol/proj/Projection~Projection} constructor or by using\n * {@link module:ol/proj/Projection~Projection#setGetPointResolution} to change an existing\n * projection object.\n * @param {ProjectionLike} projection The projection.\n * @param {number} resolution Nominal resolution in projection units.\n * @param {import(\"./coordinate.js\").Coordinate} point Point to find adjusted resolution at.\n * @param {import(\"./proj/Units.js\").Units} [units] Units to get the point resolution in.\n * Default is the projection's units.\n * @return {number} Point resolution.\n * @api\n */\nexport function getPointResolution(projection, resolution, point, units) {\n projection = get(projection);\n let pointResolution;\n const getter = projection.getPointResolutionFunc();\n if (getter) {\n pointResolution = getter(resolution, point);\n if (units && units !== projection.getUnits()) {\n const metersPerUnit = projection.getMetersPerUnit();\n if (metersPerUnit) {\n pointResolution =\n (pointResolution * metersPerUnit) / METERS_PER_UNIT[units];\n }\n }\n } else {\n const projUnits = projection.getUnits();\n if ((projUnits == 'degrees' && !units) || units == 'degrees') {\n pointResolution = resolution;\n } else {\n // Estimate point resolution by transforming the center pixel to EPSG:4326,\n // measuring its width and height on the normal sphere, and taking the\n // average of the width and height.\n const toEPSG4326 = getTransformFromProjections(\n projection,\n get('EPSG:4326'),\n );\n if (!toEPSG4326 && projUnits !== 'degrees') {\n // no transform is available\n pointResolution = resolution * projection.getMetersPerUnit();\n } else {\n let vertices = [\n point[0] - resolution / 2,\n point[1],\n point[0] + resolution / 2,\n point[1],\n point[0],\n point[1] - resolution / 2,\n point[0],\n point[1] + resolution / 2,\n ];\n vertices = toEPSG4326(vertices, vertices, 2);\n const width = getDistance(vertices.slice(0, 2), vertices.slice(2, 4));\n const height = getDistance(vertices.slice(4, 6), vertices.slice(6, 8));\n pointResolution = (width + height) / 2;\n }\n const metersPerUnit = units\n ? METERS_PER_UNIT[units]\n : projection.getMetersPerUnit();\n if (metersPerUnit !== undefined) {\n pointResolution /= metersPerUnit;\n }\n }\n }\n return pointResolution;\n}\n\n/**\n * Registers transformation functions that don't alter coordinates. Those allow\n * to transform between projections with equal meaning.\n *\n * @param {Array} projections Projections.\n * @api\n */\nexport function addEquivalentProjections(projections) {\n addProjections(projections);\n projections.forEach(function (source) {\n projections.forEach(function (destination) {\n if (source !== destination) {\n addTransformFunc(source, destination, cloneTransform);\n }\n });\n });\n}\n\n/**\n * Registers transformation functions to convert coordinates in any projection\n * in projection1 to any projection in projection2.\n *\n * @param {Array} projections1 Projections with equal\n * meaning.\n * @param {Array} projections2 Projections with equal\n * meaning.\n * @param {TransformFunction} forwardTransform Transformation from any\n * projection in projection1 to any projection in projection2.\n * @param {TransformFunction} inverseTransform Transform from any projection\n * in projection2 to any projection in projection1..\n */\nexport function addEquivalentTransforms(\n projections1,\n projections2,\n forwardTransform,\n inverseTransform,\n) {\n projections1.forEach(function (projection1) {\n projections2.forEach(function (projection2) {\n addTransformFunc(projection1, projection2, forwardTransform);\n addTransformFunc(projection2, projection1, inverseTransform);\n });\n });\n}\n\n/**\n * Clear all cached projections and transforms.\n */\nexport function clearAllProjections() {\n clearProj();\n clearTransformFuncs();\n}\n\n/**\n * @param {Projection|string|undefined} projection Projection.\n * @param {string} defaultCode Default code.\n * @return {Projection} Projection.\n */\nexport function createProjection(projection, defaultCode) {\n if (!projection) {\n return get(defaultCode);\n }\n if (typeof projection === 'string') {\n return get(projection);\n }\n return /** @type {Projection} */ (projection);\n}\n\n/**\n * Creates a {@link module:ol/proj~TransformFunction} from a simple 2D coordinate transform\n * function.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} coordTransform Coordinate\n * transform.\n * @return {TransformFunction} Transform function.\n */\nexport function createTransformFromCoordinateTransform(coordTransform) {\n return (\n /**\n * @param {Array} input Input.\n * @param {Array} [output] Output.\n * @param {number} [dimension] Dimensions that should be transformed.\n * @param {number} [stride] Stride.\n * @return {Array} Output.\n */\n function (input, output, dimension, stride) {\n const length = input.length;\n dimension = dimension !== undefined ? dimension : 2;\n stride = stride ?? dimension;\n output = output !== undefined ? output : new Array(length);\n for (let i = 0; i < length; i += stride) {\n const point = coordTransform(input.slice(i, i + dimension));\n const pointLength = point.length;\n for (let j = 0, jj = stride; j < jj; ++j) {\n output[i + j] = j >= pointLength ? input[i + j] : point[j];\n }\n }\n return output;\n }\n );\n}\n\n/**\n * Registers coordinate transform functions to convert coordinates between the\n * source projection and the destination projection.\n * The forward and inverse functions convert coordinate pairs; this function\n * converts these into the functions used internally which also handle\n * extents and coordinate arrays.\n *\n * @param {ProjectionLike} source Source projection.\n * @param {ProjectionLike} destination Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} forward The forward transform\n * function (that is, from the source projection to the destination\n * projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n * the transformed {@link module:ol/coordinate~Coordinate}.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} inverse The inverse transform\n * function (that is, from the destination projection to the source\n * projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n * the transformed {@link module:ol/coordinate~Coordinate}. If the transform function can only\n * transform less dimensions than the input coordinate, it is supposeed to return a coordinate\n * with only the length it can transform. The other dimensions will be taken unchanged from the\n * source.\n * @api\n */\nexport function addCoordinateTransforms(source, destination, forward, inverse) {\n const sourceProj = get(source);\n const destProj = get(destination);\n addTransformFunc(\n sourceProj,\n destProj,\n createTransformFromCoordinateTransform(forward),\n );\n addTransformFunc(\n destProj,\n sourceProj,\n createTransformFromCoordinateTransform(inverse),\n );\n}\n\n/**\n * Transforms a coordinate from longitude/latitude to a different projection.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate as longitude and latitude, i.e.\n * an array with longitude as 1st and latitude as 2nd element.\n * @param {ProjectionLike} [projection] Target projection. The\n * default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate projected to the target projection.\n * @api\n */\nexport function fromLonLat(coordinate, projection) {\n disableCoordinateWarning();\n return transform(\n coordinate,\n 'EPSG:4326',\n projection !== undefined ? projection : 'EPSG:3857',\n );\n}\n\n/**\n * Transforms a coordinate to longitude/latitude.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Projected coordinate.\n * @param {ProjectionLike} [projection] Projection of the coordinate.\n * The default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate as longitude and latitude, i.e. an array\n * with longitude as 1st and latitude as 2nd element.\n * @api\n */\nexport function toLonLat(coordinate, projection) {\n const lonLat = transform(\n coordinate,\n projection !== undefined ? projection : 'EPSG:3857',\n 'EPSG:4326',\n );\n const lon = lonLat[0];\n if (lon < -180 || lon > 180) {\n lonLat[0] = modulo(lon + 180, 360) - 180;\n }\n return lonLat;\n}\n\n/**\n * Checks if two projections are the same, that is every coordinate in one\n * projection does represent the same geographic point as the same coordinate in\n * the other projection.\n *\n * @param {Projection} projection1 Projection 1.\n * @param {Projection} projection2 Projection 2.\n * @return {boolean} Equivalent.\n * @api\n */\nexport function equivalent(projection1, projection2) {\n if (projection1 === projection2) {\n return true;\n }\n const equalUnits = projection1.getUnits() === projection2.getUnits();\n if (projection1.getCode() === projection2.getCode()) {\n return equalUnits;\n }\n const transformFunc = getTransformFromProjections(projection1, projection2);\n return transformFunc === cloneTransform && equalUnits;\n}\n\n/**\n * Searches in the list of transform functions for the function for converting\n * coordinates from the source projection to the destination projection.\n *\n * @param {Projection} source Source Projection object.\n * @param {Projection} destination Destination Projection\n * object.\n * @return {TransformFunction|null} Transform function.\n */\nexport function getTransformFromProjections(source, destination) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n let transformFunc = getTransformFunc(sourceCode, destinationCode);\n if (transformFunc) {\n return transformFunc;\n }\n\n /**\n * @type {Transforms|null}\n */\n let sourceTransforms = null;\n\n /**\n * @type {Transforms|null}\n */\n let destinationTransforms = null;\n\n // lazily add projections if we have supported transforms\n for (const makeTransforms of transformFactories) {\n if (!sourceTransforms) {\n sourceTransforms = makeTransforms(source);\n }\n if (!destinationTransforms) {\n destinationTransforms = makeTransforms(destination);\n }\n }\n\n if (!sourceTransforms && !destinationTransforms) {\n return null;\n }\n\n const intermediateCode = 'EPSG:4326';\n if (!destinationTransforms) {\n const toDestination = getTransformFunc(intermediateCode, destinationCode);\n if (toDestination) {\n transformFunc = composeTransformFuncs(\n sourceTransforms.inverse,\n toDestination,\n );\n }\n } else if (!sourceTransforms) {\n const fromSource = getTransformFunc(sourceCode, intermediateCode);\n if (fromSource) {\n transformFunc = composeTransformFuncs(\n fromSource,\n destinationTransforms.forward,\n );\n }\n } else {\n transformFunc = composeTransformFuncs(\n sourceTransforms.inverse,\n destinationTransforms.forward,\n );\n }\n\n if (transformFunc) {\n addProjection(source);\n addProjection(destination);\n addTransformFunc(source, destination, transformFunc);\n }\n\n return transformFunc;\n}\n\n/**\n * @param {TransformFunction} t1 The first transform function.\n * @param {TransformFunction} t2 The second transform function.\n * @return {TransformFunction} The composed transform function.\n */\nfunction composeTransformFuncs(t1, t2) {\n return function (input, output, dimensions, stride) {\n output = t1(input, output, dimensions, stride);\n return t2(output, output, dimensions, stride);\n };\n}\n\n/**\n * Given the projection-like objects, searches for a transformation\n * function to convert a coordinates array from the source projection to the\n * destination projection.\n *\n * @param {ProjectionLike} source Source.\n * @param {ProjectionLike} destination Destination.\n * @return {TransformFunction} Transform function.\n * @api\n */\nexport function getTransform(source, destination) {\n const sourceProjection = get(source);\n const destinationProjection = get(destination);\n return getTransformFromProjections(sourceProjection, destinationProjection);\n}\n\n/**\n * Transforms a coordinate from source projection to destination projection.\n * This returns a new coordinate (and does not modify the original). If there\n * is no available transform between the two projection, the function will throw\n * an error.\n *\n * See {@link module:ol/proj.transformExtent} for extent transformation.\n * See the transform method of {@link module:ol/geom/Geometry~Geometry} and its\n * subclasses for geometry transforms.\n *\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n * @api\n */\nexport function transform(coordinate, source, destination) {\n const transformFunc = getTransform(source, destination);\n if (!transformFunc) {\n const sourceCode = get(source).getCode();\n const destinationCode = get(destination).getCode();\n throw new Error(\n `No transform available between ${sourceCode} and ${destinationCode}`,\n );\n }\n return transformFunc(coordinate, undefined, coordinate.length);\n}\n\n/**\n * Transforms an extent from source projection to destination projection. This\n * returns a new extent (and does not modify the original).\n *\n * @param {import(\"./extent.js\").Extent} extent The extent to transform.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @param {number} [stops] Number of stops per side used for the transform.\n * By default only the corners are used.\n * @return {import(\"./extent.js\").Extent} The transformed extent.\n * @api\n */\nexport function transformExtent(extent, source, destination, stops) {\n const transformFunc = getTransform(source, destination);\n return applyTransform(extent, transformFunc, undefined, stops);\n}\n\n/**\n * Transforms the given point to the destination projection.\n *\n * @param {import(\"./coordinate.js\").Coordinate} point Point.\n * @param {Projection} sourceProjection Source projection.\n * @param {Projection} destinationProjection Destination projection.\n * @return {import(\"./coordinate.js\").Coordinate} Point.\n */\nexport function transformWithProjections(\n point,\n sourceProjection,\n destinationProjection,\n) {\n const transformFunc = getTransformFromProjections(\n sourceProjection,\n destinationProjection,\n );\n return transformFunc(point);\n}\n\n/**\n * @type {Projection|null}\n */\nlet userProjection = null;\n\n/**\n * Set the projection for coordinates supplied from and returned by API methods.\n * This includes all API methods except for those interacting with tile grids,\n * plus {@link import(\"./Map.js\").FrameState} and {@link import(\"./View.js\").State}.\n * @param {ProjectionLike} projection The user projection.\n * @api\n */\nexport function setUserProjection(projection) {\n userProjection = get(projection);\n}\n\n/**\n * Clear the user projection if set.\n * @api\n */\nexport function clearUserProjection() {\n userProjection = null;\n}\n\n/**\n * Get the projection for coordinates supplied from and returned by API methods.\n * @return {Projection|null} The user projection (or null if not set).\n * @api\n */\nexport function getUserProjection() {\n return userProjection;\n}\n\n/**\n * Use geographic coordinates (WGS-84 datum) in API methods.\n * This includes all API methods except for those interacting with tile grids,\n * plus {@link import(\"./Map.js\").FrameState} and {@link import(\"./View.js\").State}.\n * @api\n */\nexport function useGeographic() {\n setUserProjection('EPSG:4326');\n}\n\n/**\n * Return a coordinate transformed into the user projection. If no user projection\n * is set, the original coordinate is returned.\n * @param {Array} coordinate Input coordinate.\n * @param {ProjectionLike} sourceProjection The input coordinate projection.\n * @return {Array} The input coordinate in the user projection.\n */\nexport function toUserCoordinate(coordinate, sourceProjection) {\n if (!userProjection) {\n return coordinate;\n }\n return transform(coordinate, sourceProjection, userProjection);\n}\n\n/**\n * Return a coordinate transformed from the user projection. If no user projection\n * is set, the original coordinate is returned.\n * @param {Array} coordinate Input coordinate.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {Array} The input coordinate transformed.\n */\nexport function fromUserCoordinate(coordinate, destProjection) {\n if (!userProjection) {\n if (\n showCoordinateWarning &&\n !equals(coordinate, [0, 0]) &&\n coordinate[0] >= -180 &&\n coordinate[0] <= 180 &&\n coordinate[1] >= -90 &&\n coordinate[1] <= 90\n ) {\n showCoordinateWarning = false;\n warn(\n 'Call useGeographic() from ol/proj once to work with [longitude, latitude] coordinates.',\n );\n }\n return coordinate;\n }\n return transform(coordinate, userProjection, destProjection);\n}\n\n/**\n * Return an extent transformed into the user projection. If no user projection\n * is set, the original extent is returned.\n * @param {import(\"./extent.js\").Extent} extent Input extent.\n * @param {ProjectionLike} sourceProjection The input extent projection.\n * @return {import(\"./extent.js\").Extent} The input extent in the user projection.\n */\nexport function toUserExtent(extent, sourceProjection) {\n if (!userProjection) {\n return extent;\n }\n return transformExtent(extent, sourceProjection, userProjection);\n}\n\n/**\n * Return an extent transformed from the user projection. If no user projection\n * is set, the original extent is returned.\n * @param {import(\"./extent.js\").Extent} extent Input extent.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {import(\"./extent.js\").Extent} The input extent transformed.\n */\nexport function fromUserExtent(extent, destProjection) {\n if (!userProjection) {\n return extent;\n }\n return transformExtent(extent, userProjection, destProjection);\n}\n\n/**\n * Return the resolution in user projection units per pixel. If no user projection\n * is set, or source or user projection are missing units, the original resolution\n * is returned.\n * @param {number} resolution Resolution in input projection units per pixel.\n * @param {ProjectionLike} sourceProjection The input projection.\n * @return {number} Resolution in user projection units per pixel.\n */\nexport function toUserResolution(resolution, sourceProjection) {\n if (!userProjection) {\n return resolution;\n }\n const sourceMetersPerUnit = get(sourceProjection).getMetersPerUnit();\n const userMetersPerUnit = userProjection.getMetersPerUnit();\n return sourceMetersPerUnit && userMetersPerUnit\n ? (resolution * sourceMetersPerUnit) / userMetersPerUnit\n : resolution;\n}\n\n/**\n * Return the resolution in user projection units per pixel. If no user projection\n * is set, or source or user projection are missing units, the original resolution\n * is returned.\n * @param {number} resolution Resolution in user projection units per pixel.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {number} Resolution in destination projection units per pixel.\n */\nexport function fromUserResolution(resolution, destProjection) {\n if (!userProjection) {\n return resolution;\n }\n const destMetersPerUnit = get(destProjection).getMetersPerUnit();\n const userMetersPerUnit = userProjection.getMetersPerUnit();\n return destMetersPerUnit && userMetersPerUnit\n ? (resolution * userMetersPerUnit) / destMetersPerUnit\n : resolution;\n}\n\n/**\n * Creates a safe coordinate transform function from a coordinate transform function.\n * \"Safe\" means that it can handle wrapping of x-coordinates for global projections,\n * and that coordinates exceeding the source projection validity extent's range will be\n * clamped to the validity range.\n * @param {Projection} sourceProj Source projection.\n * @param {Projection} destProj Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} transform Transform function (source to destination).\n * @return {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} Safe transform function (source to destination).\n */\nexport function createSafeCoordinateTransform(sourceProj, destProj, transform) {\n return function (coord) {\n let transformed, worldsAway;\n if (sourceProj.canWrapX()) {\n const sourceExtent = sourceProj.getExtent();\n const sourceExtentWidth = getWidth(sourceExtent);\n coord = coord.slice(0);\n worldsAway = getWorldsAway(coord, sourceProj, sourceExtentWidth);\n if (worldsAway) {\n // Move x to the real world\n coord[0] = coord[0] - worldsAway * sourceExtentWidth;\n }\n coord[0] = clamp(coord[0], sourceExtent[0], sourceExtent[2]);\n coord[1] = clamp(coord[1], sourceExtent[1], sourceExtent[3]);\n transformed = transform(coord);\n } else {\n transformed = transform(coord);\n }\n if (worldsAway && destProj.canWrapX()) {\n // Move transformed coordinate back to the offset world\n transformed[0] += worldsAway * getWidth(destProj.getExtent());\n }\n return transformed;\n };\n}\n\n/**\n * Add transforms to and from EPSG:4326 and EPSG:3857. This function is called\n * by when this module is executed and should only need to be called again after\n * `clearAllProjections()` is called (e.g. in tests).\n */\nexport function addCommon() {\n // Add transformations that don't alter coordinates to convert within set of\n // projections with equal meaning.\n addEquivalentProjections(EPSG3857_PROJECTIONS);\n addEquivalentProjections(EPSG4326_PROJECTIONS);\n // Add transformations to convert EPSG:4326 like coordinates to EPSG:3857 like\n // coordinates and back.\n addEquivalentTransforms(\n EPSG4326_PROJECTIONS,\n EPSG3857_PROJECTIONS,\n fromEPSG4326,\n toEPSG4326,\n );\n}\n\naddCommon();\n","/**\n * @module ol/transform\n */\nimport {assert} from './asserts.js';\n\n/**\n * An array representing an affine 2d transformation for use with\n * {@link module:ol/transform} functions. The array has 6 elements.\n * @typedef {!Array} Transform\n * @api\n */\n\n/**\n * Collection of affine 2d transformation functions. The functions work on an\n * array of 6 elements. The element order is compatible with the [SVGMatrix\n * interface](https://developer.mozilla.org/en-US/docs/Web/API/SVGMatrix) and is\n * a subset (elements a to f) of a 3×3 matrix:\n * ```\n * [ a c e ]\n * [ b d f ]\n * [ 0 0 1 ]\n * ```\n */\n\n/** @type {Transform} */\nexport const IDENTITY_TRANSFORM = [1, 0, 0, 1, 0, 0];\n\n/**\n * @private\n * @type {Transform}\n */\nconst tmp_ = new Array(6);\n\n/**\n * Create an identity transform.\n * @return {!Transform} Identity transform.\n */\nexport function create() {\n return IDENTITY_TRANSFORM.slice(0);\n}\n\n/**\n * Resets the given transform to an identity transform.\n * @param {!Transform} transform Transform.\n * @return {!Transform} Transform.\n */\nexport function reset(transform) {\n return set(transform, 1, 0, 0, 1, 0, 0);\n}\n\n/**\n * Multiply the underlying matrices of two transforms and return the result in\n * the first transform.\n * @param {!Transform} transform1 Transform parameters of matrix 1.\n * @param {!Transform} transform2 Transform parameters of matrix 2.\n * @return {!Transform} transform1 multiplied with transform2.\n */\nexport function multiply(transform1, transform2) {\n const a1 = transform1[0];\n const b1 = transform1[1];\n const c1 = transform1[2];\n const d1 = transform1[3];\n const e1 = transform1[4];\n const f1 = transform1[5];\n const a2 = transform2[0];\n const b2 = transform2[1];\n const c2 = transform2[2];\n const d2 = transform2[3];\n const e2 = transform2[4];\n const f2 = transform2[5];\n\n transform1[0] = a1 * a2 + c1 * b2;\n transform1[1] = b1 * a2 + d1 * b2;\n transform1[2] = a1 * c2 + c1 * d2;\n transform1[3] = b1 * c2 + d1 * d2;\n transform1[4] = a1 * e2 + c1 * f2 + e1;\n transform1[5] = b1 * e2 + d1 * f2 + f1;\n\n return transform1;\n}\n\n/**\n * Set the transform components a-f on a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} a The a component of the transform.\n * @param {number} b The b component of the transform.\n * @param {number} c The c component of the transform.\n * @param {number} d The d component of the transform.\n * @param {number} e The e component of the transform.\n * @param {number} f The f component of the transform.\n * @return {!Transform} Matrix with transform applied.\n */\nexport function set(transform, a, b, c, d, e, f) {\n transform[0] = a;\n transform[1] = b;\n transform[2] = c;\n transform[3] = d;\n transform[4] = e;\n transform[5] = f;\n return transform;\n}\n\n/**\n * Set transform on one matrix from another matrix.\n * @param {!Transform} transform1 Matrix to set transform to.\n * @param {!Transform} transform2 Matrix to set transform from.\n * @return {!Transform} transform1 with transform from transform2 applied.\n */\nexport function setFromArray(transform1, transform2) {\n transform1[0] = transform2[0];\n transform1[1] = transform2[1];\n transform1[2] = transform2[2];\n transform1[3] = transform2[3];\n transform1[4] = transform2[4];\n transform1[5] = transform2[5];\n return transform1;\n}\n\n/**\n * Transforms the given coordinate with the given transform returning the\n * resulting, transformed coordinate. The coordinate will be modified in-place.\n *\n * @param {Transform} transform The transformation.\n * @param {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} coordinate The coordinate to transform.\n * @return {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} return coordinate so that operations can be\n * chained together.\n */\nexport function apply(transform, coordinate) {\n const x = coordinate[0];\n const y = coordinate[1];\n coordinate[0] = transform[0] * x + transform[2] * y + transform[4];\n coordinate[1] = transform[1] * x + transform[3] * y + transform[5];\n return coordinate;\n}\n\n/**\n * Applies rotation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} angle Angle in radians.\n * @return {!Transform} The rotated transform.\n */\nexport function rotate(transform, angle) {\n const cos = Math.cos(angle);\n const sin = Math.sin(angle);\n return multiply(transform, set(tmp_, cos, sin, -sin, cos, 0, 0));\n}\n\n/**\n * Applies scale to a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scaled transform.\n */\nexport function scale(transform, x, y) {\n return multiply(transform, set(tmp_, x, 0, 0, y, 0, 0));\n}\n\n/**\n * Creates a scale transform.\n * @param {!Transform} target Transform to overwrite.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scale transform.\n */\nexport function makeScale(target, x, y) {\n return set(target, x, 0, 0, y, 0, 0);\n}\n\n/**\n * Applies translation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} dx Translation x.\n * @param {number} dy Translation y.\n * @return {!Transform} The translated transform.\n */\nexport function translate(transform, dx, dy) {\n return multiply(transform, set(tmp_, 1, 0, 0, 1, dx, dy));\n}\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative).\n * @param {!Transform} transform The transform (will be modified in place).\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {!Transform} The composite transform.\n */\nexport function compose(transform, dx1, dy1, sx, sy, angle, dx2, dy2) {\n const sin = Math.sin(angle);\n const cos = Math.cos(angle);\n transform[0] = sx * cos;\n transform[1] = sy * sin;\n transform[2] = -sx * sin;\n transform[3] = sy * cos;\n transform[4] = dx2 * sx * cos - dy2 * sx * sin + dx1;\n transform[5] = dx2 * sy * sin + dy2 * sy * cos + dy1;\n return transform;\n}\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative). The resulting transform\n * string can be applied as `transform` property of an HTMLElement's style.\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {string} The composite css transform.\n * @api\n */\nexport function composeCssTransform(dx1, dy1, sx, sy, angle, dx2, dy2) {\n return toString(compose(create(), dx1, dy1, sx, sy, angle, dx2, dy2));\n}\n\n/**\n * Invert the given transform.\n * @param {!Transform} source The source transform to invert.\n * @return {!Transform} The inverted (source) transform.\n */\nexport function invert(source) {\n return makeInverse(source, source);\n}\n\n/**\n * Invert the given transform.\n * @param {!Transform} target Transform to be set as the inverse of\n * the source transform.\n * @param {!Transform} source The source transform to invert.\n * @return {!Transform} The inverted (target) transform.\n */\nexport function makeInverse(target, source) {\n const det = determinant(source);\n assert(det !== 0, 'Transformation matrix cannot be inverted');\n\n const a = source[0];\n const b = source[1];\n const c = source[2];\n const d = source[3];\n const e = source[4];\n const f = source[5];\n\n target[0] = d / det;\n target[1] = -b / det;\n target[2] = -c / det;\n target[3] = a / det;\n target[4] = (c * f - d * e) / det;\n target[5] = -(a * f - b * e) / det;\n\n return target;\n}\n\n/**\n * Returns the determinant of the given matrix.\n * @param {!Transform} mat Matrix.\n * @return {number} Determinant.\n */\nexport function determinant(mat) {\n return mat[0] * mat[3] - mat[1] * mat[2];\n}\n\n/**\n * @type {Array}\n */\nconst matrixPrecision = [1e5, 1e5, 1e5, 1e5, 2, 2];\n\n/**\n * A matrix string version of the transform. This can be used\n * for CSS transforms.\n * @param {!Transform} mat Matrix.\n * @return {string} The transform as a string.\n */\nexport function toString(mat) {\n const transformString = 'matrix(' + mat.join(', ') + ')';\n return transformString;\n}\n\n/**\n * Create a transform from a CSS transform matrix string.\n * @param {string} cssTransform The CSS string to parse.\n * @return {!Transform} The transform.\n */\nexport function fromString(cssTransform) {\n const values = cssTransform.substring(7, cssTransform.length - 1).split(',');\n return values.map(parseFloat);\n}\n\n/**\n * Compare two matrices for equality.\n * @param {!string} cssTransform1 A CSS transform matrix string.\n * @param {!string} cssTransform2 A CSS transform matrix string.\n * @return {boolean} The two matrices are equal.\n */\nexport function equivalent(cssTransform1, cssTransform2) {\n const mat1 = fromString(cssTransform1);\n const mat2 = fromString(cssTransform2);\n for (let i = 0; i < 6; ++i) {\n if (Math.round((mat1[i] - mat2[i]) * matrixPrecision[i]) !== 0) {\n return false;\n }\n }\n return true;\n}\n","/**\n * @module ol/geom/flat/transform\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {Array} [dest] Destination.\n * @param {number} [destinationStride] Stride of destination coordinates; if unspecified, assumed to be 2.\n * @return {Array} Transformed coordinates.\n */\nexport function transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n transform,\n dest,\n destinationStride,\n) {\n dest = dest ? dest : [];\n destinationStride = destinationStride ? destinationStride : 2;\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const x = flatCoordinates[j];\n const y = flatCoordinates[j + 1];\n dest[i++] = transform[0] * x + transform[2] * y + transform[4];\n dest[i++] = transform[1] * x + transform[3] * y + transform[5];\n\n for (let k = 2; k < destinationStride; k++) {\n dest[i++] = flatCoordinates[j + k];\n }\n }\n\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} angle Angle.\n * @param {Array} anchor Rotation anchor point.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function rotate(\n flatCoordinates,\n offset,\n end,\n stride,\n angle,\n anchor,\n dest,\n) {\n dest = dest ? dest : [];\n const cos = Math.cos(angle);\n const sin = Math.sin(angle);\n const anchorX = anchor[0];\n const anchorY = anchor[1];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const deltaX = flatCoordinates[j] - anchorX;\n const deltaY = flatCoordinates[j + 1] - anchorY;\n dest[i++] = anchorX + deltaX * cos - deltaY * sin;\n dest[i++] = anchorY + deltaX * sin + deltaY * cos;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * Scale the coordinates.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} sx Scale factor in the x-direction.\n * @param {number} sy Scale factor in the y-direction.\n * @param {Array} anchor Scale anchor point.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function scale(\n flatCoordinates,\n offset,\n end,\n stride,\n sx,\n sy,\n anchor,\n dest,\n) {\n dest = dest ? dest : [];\n const anchorX = anchor[0];\n const anchorY = anchor[1];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const deltaX = flatCoordinates[j] - anchorX;\n const deltaY = flatCoordinates[j + 1] - anchorY;\n dest[i++] = anchorX + sx * deltaX;\n dest[i++] = anchorY + sy * deltaY;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function translate(\n flatCoordinates,\n offset,\n end,\n stride,\n deltaX,\n deltaY,\n dest,\n) {\n dest = dest ? dest : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n dest[i++] = flatCoordinates[j] + deltaX;\n dest[i++] = flatCoordinates[j + 1] + deltaY;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n","/**\n * @module ol/geom/Geometry\n */\nimport BaseObject from '../Object.js';\nimport {\n createEmpty,\n createOrUpdateEmpty,\n getHeight,\n returnOrUpdate,\n} from '../extent.js';\nimport {memoizeOne} from '../functions.js';\nimport {get as getProjection, getTransform} from '../proj.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../transform.js';\nimport {abstract} from '../util.js';\nimport {transform2D} from './flat/transform.js';\n\n/**\n * @typedef {'XY' | 'XYZ' | 'XYM' | 'XYZM'} GeometryLayout\n * The coordinate layout for geometries, indicating whether a 3rd or 4th z ('Z')\n * or measure ('M') coordinate is available.\n */\n\n/**\n * @typedef {'Point' | 'LineString' | 'LinearRing' | 'Polygon' | 'MultiPoint' | 'MultiLineString' | 'MultiPolygon' | 'GeometryCollection' | 'Circle'} Type\n * The geometry type. One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'`, `'MultiLineString'`, `'MultiPolygon'`,\n * `'GeometryCollection'`, or `'Circle'`.\n */\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nconst tmpTransform = createTransform();\n\n/** @type {import('../coordinate.js').Coordinate} */\nconst tmpPoint = [NaN, NaN];\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for vector geometries.\n *\n * To get notified of changes to the geometry, register a listener for the\n * generic `change` event on your geometry instance.\n *\n * @abstract\n * @api\n */\nclass Geometry extends BaseObject {\n constructor() {\n super();\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.extent_ = createEmpty();\n\n /**\n * @private\n * @type {number}\n */\n this.extentRevision_ = -1;\n\n /**\n * @protected\n * @type {number}\n */\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n\n /**\n * @protected\n * @type {number}\n */\n this.simplifiedGeometryRevision = 0;\n\n /**\n * Get a transformed and simplified version of the geometry.\n * @abstract\n * @param {number} revision The geometry revision.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @return {Geometry} Simplified geometry.\n */\n this.simplifyTransformedInternal = memoizeOne(\n (revision, squaredTolerance, transform) => {\n if (!transform) {\n return this.getSimplifiedGeometry(squaredTolerance);\n }\n const clone = this.clone();\n clone.applyTransform(transform);\n return clone.getSimplifiedGeometry(squaredTolerance);\n },\n );\n }\n\n /**\n * Get a transformed and simplified version of the geometry.\n * @abstract\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @return {Geometry} Simplified geometry.\n */\n simplifyTransformed(squaredTolerance, transform) {\n return this.simplifyTransformedInternal(\n this.getRevision(),\n squaredTolerance,\n transform,\n );\n }\n\n /**\n * Make a complete copy of the geometry.\n * @abstract\n * @return {!Geometry} Clone.\n */\n clone() {\n return abstract();\n }\n\n /**\n * @abstract\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n return abstract();\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\n containsXY(x, y) {\n return this.closestPointXY(x, y, tmpPoint, Number.MIN_VALUE) === 0;\n }\n\n /**\n * Return the closest point of the geometry to the passed point as\n * {@link module:ol/coordinate~Coordinate coordinate}.\n * @param {import(\"../coordinate.js\").Coordinate} point Point.\n * @param {import(\"../coordinate.js\").Coordinate} [closestPoint] Closest point.\n * @return {import(\"../coordinate.js\").Coordinate} Closest point.\n * @api\n */\n getClosestPoint(point, closestPoint) {\n closestPoint = closestPoint ? closestPoint : [NaN, NaN];\n this.closestPointXY(point[0], point[1], closestPoint, Infinity);\n return closestPoint;\n }\n\n /**\n * Returns true if this geometry includes the specified coordinate. If the\n * coordinate is on the boundary of the geometry, returns false.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} Contains coordinate.\n * @api\n */\n intersectsCoordinate(coordinate) {\n return this.containsXY(coordinate[0], coordinate[1]);\n }\n\n /**\n * @abstract\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n */\n computeExtent(extent) {\n return abstract();\n }\n\n /**\n * Get the extent of the geometry.\n * @param {import(\"../extent.js\").Extent} [extent] Extent.\n * @return {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\n getExtent(extent) {\n if (this.extentRevision_ != this.getRevision()) {\n const extent = this.computeExtent(this.extent_);\n if (isNaN(extent[0]) || isNaN(extent[1])) {\n createOrUpdateEmpty(extent);\n }\n this.extentRevision_ = this.getRevision();\n }\n return returnOrUpdate(this.extent_, extent);\n }\n\n /**\n * Rotate the geometry around a given coordinate. This modifies the geometry\n * coordinates in place.\n * @abstract\n * @param {number} angle Rotation angle in radians.\n * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n * @api\n */\n rotate(angle, anchor) {\n abstract();\n }\n\n /**\n * Scale the geometry (with an optional origin). This modifies the geometry\n * coordinates in place.\n * @abstract\n * @param {number} sx The scaling factor in the x-direction.\n * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n * of the geometry extent).\n * @api\n */\n scale(sx, sy, anchor) {\n abstract();\n }\n\n /**\n * Create a simplified version of this geometry. For linestrings, this uses\n * the [Douglas Peucker](https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm)\n * algorithm. For polygons, a quantization-based\n * simplification is used to preserve topology.\n * @param {number} tolerance The tolerance distance for simplification.\n * @return {Geometry} A new, simplified version of the original geometry.\n * @api\n */\n simplify(tolerance) {\n return this.getSimplifiedGeometry(tolerance * tolerance);\n }\n\n /**\n * Create a simplified version of this geometry using the Douglas Peucker\n * algorithm.\n * See https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm.\n * @abstract\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Geometry} Simplified geometry.\n */\n getSimplifiedGeometry(squaredTolerance) {\n return abstract();\n }\n\n /**\n * Get the type of this geometry.\n * @abstract\n * @return {Type} Geometry type.\n */\n getType() {\n return abstract();\n }\n\n /**\n * Apply a transform function to the coordinates of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @abstract\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n * Called with a flat array of geometry coordinates.\n */\n applyTransform(transformFn) {\n abstract();\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @abstract\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n */\n intersectsExtent(extent) {\n return abstract();\n }\n\n /**\n * Translate the geometry. This modifies the geometry coordinates in place. If\n * instead you want a new geometry, first `clone()` this geometry.\n * @abstract\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @api\n */\n translate(deltaX, deltaY) {\n abstract();\n }\n\n /**\n * Transform each coordinate of the geometry from one coordinate reference\n * system to another. The geometry is modified in place.\n * For example, a line will be transformed to a line and a circle to a circle.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n *\n * @param {import(\"../proj.js\").ProjectionLike} source The current projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @param {import(\"../proj.js\").ProjectionLike} destination The desired projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @return {this} This geometry. Note that original geometry is\n * modified in place.\n * @api\n */\n transform(source, destination) {\n /** @type {import(\"../proj/Projection.js\").default} */\n const sourceProj = getProjection(source);\n const transformFn =\n sourceProj.getUnits() == 'tile-pixels'\n ? function (inCoordinates, outCoordinates, stride) {\n const pixelExtent = sourceProj.getExtent();\n const projectedExtent = sourceProj.getWorldExtent();\n const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n composeTransform(\n tmpTransform,\n projectedExtent[0],\n projectedExtent[3],\n scale,\n -scale,\n 0,\n 0,\n 0,\n );\n const transformed = transform2D(\n inCoordinates,\n 0,\n inCoordinates.length,\n stride,\n tmpTransform,\n outCoordinates,\n );\n const projTransform = getTransform(sourceProj, destination);\n if (projTransform) {\n return projTransform(transformed, transformed, stride);\n }\n return transformed;\n }\n : getTransform(sourceProj, destination);\n this.applyTransform(transformFn);\n return this;\n }\n}\n\nexport default Geometry;\n","/**\n * @module ol/geom/SimpleGeometry\n */\nimport {createOrUpdateFromFlatCoordinates, getCenter} from '../extent.js';\nimport {abstract} from '../util.js';\nimport Geometry from './Geometry.js';\nimport {rotate, scale, transform2D, translate} from './flat/transform.js';\n\n/**\n * @classdesc\n * Abstract base class; only used for creating subclasses; do not instantiate\n * in apps, as cannot be rendered.\n *\n * @abstract\n * @api\n */\nclass SimpleGeometry extends Geometry {\n constructor() {\n super();\n\n /**\n * @protected\n * @type {import(\"./Geometry.js\").GeometryLayout}\n */\n this.layout = 'XY';\n\n /**\n * @protected\n * @type {number}\n */\n this.stride = 2;\n\n /**\n * @protected\n * @type {Array}\n */\n this.flatCoordinates;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n * @override\n */\n computeExtent(extent) {\n return createOrUpdateFromFlatCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n extent,\n );\n }\n\n /**\n * @abstract\n * @return {Array<*> | null} Coordinates.\n */\n getCoordinates() {\n return abstract();\n }\n\n /**\n * Return the first coordinate of the geometry.\n * @return {import(\"../coordinate.js\").Coordinate} First coordinate.\n * @api\n */\n getFirstCoordinate() {\n return this.flatCoordinates.slice(0, this.stride);\n }\n\n /**\n * @return {Array} Flat coordinates.\n */\n getFlatCoordinates() {\n return this.flatCoordinates;\n }\n\n /**\n * Return the last coordinate of the geometry.\n * @return {import(\"../coordinate.js\").Coordinate} Last point.\n * @api\n */\n getLastCoordinate() {\n return this.flatCoordinates.slice(\n this.flatCoordinates.length - this.stride,\n );\n }\n\n /**\n * Return the {@link import(\"./Geometry.js\").GeometryLayout layout} of the geometry.\n * @return {import(\"./Geometry.js\").GeometryLayout} Layout.\n * @api\n */\n getLayout() {\n return this.layout;\n }\n\n /**\n * Create a simplified version of this geometry using the Douglas Peucker algorithm.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {SimpleGeometry} Simplified geometry.\n * @override\n */\n getSimplifiedGeometry(squaredTolerance) {\n if (this.simplifiedGeometryRevision !== this.getRevision()) {\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n this.simplifiedGeometryRevision = this.getRevision();\n }\n // If squaredTolerance is negative or if we know that simplification will not\n // have any effect then just return this.\n if (\n squaredTolerance < 0 ||\n (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n squaredTolerance <= this.simplifiedGeometryMaxMinSquaredTolerance)\n ) {\n return this;\n }\n\n const simplifiedGeometry =\n this.getSimplifiedGeometryInternal(squaredTolerance);\n const simplifiedFlatCoordinates = simplifiedGeometry.getFlatCoordinates();\n if (simplifiedFlatCoordinates.length < this.flatCoordinates.length) {\n return simplifiedGeometry;\n }\n // Simplification did not actually remove any coordinates. We now know\n // that any calls to getSimplifiedGeometry with a squaredTolerance less\n // than or equal to the current squaredTolerance will also not have any\n // effect. This allows us to short circuit simplification (saving CPU\n // cycles) and prevents the cache of simplified geometries from filling\n // up with useless identical copies of this geometry (saving memory).\n this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n return this;\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {SimpleGeometry} Simplified geometry.\n * @protected\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n return this;\n }\n\n /**\n * @return {number} Stride.\n */\n getStride() {\n return this.stride;\n }\n\n /**\n * @param {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n * @param {Array} flatCoordinates Flat coordinates.\n */\n setFlatCoordinates(layout, flatCoordinates) {\n this.stride = getStrideForLayout(layout);\n this.layout = layout;\n this.flatCoordinates = flatCoordinates;\n }\n\n /**\n * @abstract\n * @param {!Array<*>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n setCoordinates(coordinates, layout) {\n abstract();\n }\n\n /**\n * @param {import(\"./Geometry.js\").GeometryLayout|undefined} layout Layout.\n * @param {Array<*>} coordinates Coordinates.\n * @param {number} nesting Nesting.\n * @protected\n */\n setLayout(layout, coordinates, nesting) {\n let stride;\n if (layout) {\n stride = getStrideForLayout(layout);\n } else {\n for (let i = 0; i < nesting; ++i) {\n if (coordinates.length === 0) {\n this.layout = 'XY';\n this.stride = 2;\n return;\n }\n coordinates = /** @type {Array} */ (coordinates[0]);\n }\n stride = coordinates.length;\n layout = getLayoutForStride(stride);\n }\n this.layout = layout;\n this.stride = stride;\n }\n\n /**\n * Apply a transform function to the coordinates of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n * Called with a flat array of geometry coordinates.\n * @api\n * @override\n */\n applyTransform(transformFn) {\n if (this.flatCoordinates) {\n transformFn(\n this.flatCoordinates,\n this.flatCoordinates,\n this.layout.startsWith('XYZ') ? 3 : 2,\n this.stride,\n );\n this.changed();\n }\n }\n\n /**\n * Rotate the geometry around a given coordinate. This modifies the geometry\n * coordinates in place.\n * @param {number} angle Rotation angle in counter-clockwise radians.\n * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n * @api\n * @override\n */\n rotate(angle, anchor) {\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n rotate(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n angle,\n anchor,\n flatCoordinates,\n );\n this.changed();\n }\n }\n\n /**\n * Scale the geometry (with an optional origin). This modifies the geometry\n * coordinates in place.\n * @param {number} sx The scaling factor in the x-direction.\n * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n * of the geometry extent).\n * @api\n * @override\n */\n scale(sx, sy, anchor) {\n if (sy === undefined) {\n sy = sx;\n }\n if (!anchor) {\n anchor = getCenter(this.getExtent());\n }\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n scale(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n sx,\n sy,\n anchor,\n flatCoordinates,\n );\n this.changed();\n }\n }\n\n /**\n * Translate the geometry. This modifies the geometry coordinates in place. If\n * instead you want a new geometry, first `clone()` this geometry.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @api\n * @override\n */\n translate(deltaX, deltaY) {\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n translate(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n deltaX,\n deltaY,\n flatCoordinates,\n );\n this.changed();\n }\n }\n}\n\n/**\n * @param {number} stride Stride.\n * @return {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n */\nexport function getLayoutForStride(stride) {\n let layout;\n if (stride == 2) {\n layout = 'XY';\n } else if (stride == 3) {\n layout = 'XYZ';\n } else if (stride == 4) {\n layout = 'XYZM';\n }\n return /** @type {import(\"./Geometry.js\").GeometryLayout} */ (layout);\n}\n\n/**\n * @param {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n * @return {number} Stride.\n */\nexport function getStrideForLayout(layout) {\n let stride;\n if (layout == 'XY') {\n stride = 2;\n } else if (layout == 'XYZ' || layout == 'XYM') {\n stride = 3;\n } else if (layout == 'XYZM') {\n stride = 4;\n }\n return /** @type {number} */ (stride);\n}\n\n/**\n * @param {SimpleGeometry} simpleGeometry Simple geometry.\n * @param {import(\"../transform.js\").Transform} transform Transform.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed flat coordinates.\n */\nexport function transformGeom2D(simpleGeometry, transform, dest) {\n const flatCoordinates = simpleGeometry.getFlatCoordinates();\n if (!flatCoordinates) {\n return null;\n }\n const stride = simpleGeometry.getStride();\n return transform2D(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n transform,\n dest,\n );\n}\n\nexport default SimpleGeometry;\n","/**\n * @module ol/geom/flat/area\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRing(flatCoordinates, offset, end, stride) {\n let twiceArea = 0;\n const x0 = flatCoordinates[end - stride];\n const y0 = flatCoordinates[end - stride + 1];\n let dx1 = 0;\n let dy1 = 0;\n for (; offset < end; offset += stride) {\n const dx2 = flatCoordinates[offset] - x0;\n const dy2 = flatCoordinates[offset + 1] - y0;\n twiceArea += dy1 * dx2 - dx1 * dy2;\n dx1 = dx2;\n dy1 = dy2;\n }\n return twiceArea / 2;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRings(flatCoordinates, offset, ends, stride) {\n let area = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n area += linearRing(flatCoordinates, offset, end, stride);\n offset = end;\n }\n return area;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n let area = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n area += linearRings(flatCoordinates, offset, ends, stride);\n offset = ends[ends.length - 1];\n }\n return area;\n}\n","/**\n * @module ol/geom/flat/closest\n */\nimport {lerp, squaredDistance as squaredDx} from '../../math.js';\n\n/**\n * Returns the point on the 2D line segment flatCoordinates[offset1] to\n * flatCoordinates[offset2] that is closest to the point (x, y). Extra\n * dimensions are linearly interpolated.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset1 Offset 1.\n * @param {number} offset2 Offset 2.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n */\nfunction assignClosest(\n flatCoordinates,\n offset1,\n offset2,\n stride,\n x,\n y,\n closestPoint,\n) {\n const x1 = flatCoordinates[offset1];\n const y1 = flatCoordinates[offset1 + 1];\n const dx = flatCoordinates[offset2] - x1;\n const dy = flatCoordinates[offset2 + 1] - y1;\n let offset;\n if (dx === 0 && dy === 0) {\n offset = offset1;\n } else {\n const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n if (t > 1) {\n offset = offset2;\n } else if (t > 0) {\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = lerp(\n flatCoordinates[offset1 + i],\n flatCoordinates[offset2 + i],\n t,\n );\n }\n closestPoint.length = stride;\n return;\n } else {\n offset = offset1;\n }\n }\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[offset + i];\n }\n closestPoint.length = stride;\n}\n\n/**\n * Return the squared of the largest distance between any pair of consecutive\n * coordinates.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function maxSquaredDelta(flatCoordinates, offset, end, stride, max) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n for (offset += stride; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n const squaredDelta = squaredDx(x1, y1, x2, y2);\n if (squaredDelta > max) {\n max = squaredDelta;\n }\n x1 = x2;\n y1 = y2;\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function arrayMaxSquaredDelta(\n flatCoordinates,\n offset,\n ends,\n stride,\n max,\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n max = maxSquaredDelta(flatCoordinates, offset, end, stride, max);\n offset = end;\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function multiArrayMaxSquaredDelta(\n flatCoordinates,\n offset,\n endss,\n stride,\n max,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n max = arrayMaxSquaredDelta(flatCoordinates, offset, ends, stride, max);\n offset = ends[ends.length - 1];\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestPoint(\n flatCoordinates,\n offset,\n end,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n) {\n if (offset == end) {\n return minSquaredDistance;\n }\n let i, squaredDistance;\n if (maxDelta === 0) {\n // All points are identical, so just test the first point.\n squaredDistance = squaredDx(\n x,\n y,\n flatCoordinates[offset],\n flatCoordinates[offset + 1],\n );\n if (squaredDistance < minSquaredDistance) {\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[offset + i];\n }\n closestPoint.length = stride;\n return squaredDistance;\n }\n return minSquaredDistance;\n }\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n let index = offset + stride;\n while (index < end) {\n assignClosest(\n flatCoordinates,\n index - stride,\n index,\n stride,\n x,\n y,\n tmpPoint,\n );\n squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = tmpPoint[i];\n }\n closestPoint.length = stride;\n index += stride;\n } else {\n // Skip ahead multiple points, because we know that all the skipped\n // points cannot be any closer than the closest point we have found so\n // far. We know this because we know how close the current point is, how\n // close the closest point we have found so far is, and the maximum\n // distance between consecutive points. For example, if we're currently\n // at distance 10, the best we've found so far is 3, and that the maximum\n // distance between consecutive points is 2, then we'll need to skip at\n // least (10 - 3) / 2 == 3 (rounded down) points to have any chance of\n // finding a closer point. We use Math.max(..., 1) to ensure that we\n // always advance at least one point, to avoid an infinite loop.\n index +=\n stride *\n Math.max(\n ((Math.sqrt(squaredDistance) - Math.sqrt(minSquaredDistance)) /\n maxDelta) |\n 0,\n 1,\n );\n }\n }\n if (isRing) {\n // Check the closing segment.\n assignClosest(\n flatCoordinates,\n end - stride,\n offset,\n stride,\n x,\n y,\n tmpPoint,\n );\n squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = tmpPoint[i];\n }\n closestPoint.length = stride;\n }\n }\n return minSquaredDistance;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestArrayPoint(\n flatCoordinates,\n offset,\n ends,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n) {\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n minSquaredDistance = assignClosestPoint(\n flatCoordinates,\n offset,\n end,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n );\n offset = end;\n }\n return minSquaredDistance;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestMultiArrayPoint(\n flatCoordinates,\n offset,\n endss,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n) {\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n minSquaredDistance = assignClosestArrayPoint(\n flatCoordinates,\n offset,\n ends,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n );\n offset = ends[ends.length - 1];\n }\n return minSquaredDistance;\n}\n","/**\n * @module ol/geom/flat/deflate\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinate(flatCoordinates, offset, coordinate, stride) {\n for (let i = 0, ii = coordinate.length; i < ii; ++i) {\n flatCoordinates[offset++] = coordinate[i];\n }\n return offset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} coordinates Coordinates.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinates(\n flatCoordinates,\n offset,\n coordinates,\n stride,\n) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n const coordinate = coordinates[i];\n for (let j = 0; j < stride; ++j) {\n flatCoordinates[offset++] = coordinate[j];\n }\n }\n return offset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} coordinatess Coordinatess.\n * @param {number} stride Stride.\n * @param {Array} [ends] Ends.\n * @return {Array} Ends.\n */\nexport function deflateCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatess,\n stride,\n ends,\n) {\n ends = ends ? ends : [];\n let i = 0;\n for (let j = 0, jj = coordinatess.length; j < jj; ++j) {\n const end = deflateCoordinates(\n flatCoordinates,\n offset,\n coordinatess[j],\n stride,\n );\n ends[i++] = end;\n offset = end;\n }\n ends.length = i;\n return ends;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>>} coordinatesss Coordinatesss.\n * @param {number} stride Stride.\n * @param {Array>} [endss] Endss.\n * @return {Array>} Endss.\n */\nexport function deflateMultiCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatesss,\n stride,\n endss,\n) {\n endss = endss ? endss : [];\n let i = 0;\n for (let j = 0, jj = coordinatesss.length; j < jj; ++j) {\n const ends = deflateCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatesss[j],\n stride,\n endss[i],\n );\n if (ends.length === 0) {\n ends[0] = offset;\n }\n endss[i++] = ends;\n offset = ends[ends.length - 1];\n }\n endss.length = i;\n return endss;\n}\n","/**\n * @module ol/geom/flat/inflate\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array} [coordinates] Coordinates.\n * @return {Array} Coordinates.\n */\nexport function inflateCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinates,\n) {\n coordinates = coordinates !== undefined ? coordinates : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n coordinates[i++] = flatCoordinates.slice(j, j + stride);\n }\n coordinates.length = i;\n return coordinates;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {Array>} [coordinatess] Coordinatess.\n * @return {Array>} Coordinatess.\n */\nexport function inflateCoordinatesArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n coordinatess,\n) {\n coordinatess = coordinatess !== undefined ? coordinatess : [];\n let i = 0;\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n const end = ends[j];\n coordinatess[i++] = inflateCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinatess[i],\n );\n offset = end;\n }\n coordinatess.length = i;\n return coordinatess;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array>>} [coordinatesss]\n * Coordinatesss.\n * @return {Array>>} Coordinatesss.\n */\nexport function inflateMultiCoordinatesArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n coordinatesss,\n) {\n coordinatesss = coordinatesss !== undefined ? coordinatesss : [];\n let i = 0;\n for (let j = 0, jj = endss.length; j < jj; ++j) {\n const ends = endss[j];\n coordinatesss[i++] =\n ends.length === 1 && ends[0] === offset\n ? []\n : inflateCoordinatesArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n coordinatesss[i],\n );\n offset = ends[ends.length - 1];\n }\n coordinatesss.length = i;\n return coordinatesss;\n}\n","/**\n * @module ol/geom/flat/contains\n */\nimport {forEachCorner} from '../../extent.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} Contains extent.\n */\nexport function linearRingContainsExtent(\n flatCoordinates,\n offset,\n end,\n stride,\n extent,\n) {\n const outside = forEachCorner(\n extent,\n /**\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} Contains (x, y).\n */\n function (coordinate) {\n return !linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinate[0],\n coordinate[1],\n );\n },\n );\n return !outside;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n x,\n y,\n) {\n // https://web.archive.org/web/20210504233957/http://geomalgorithms.com/a03-_inclusion.html\n // Copyright 2000 softSurfer, 2012 Dan Sunday\n // This code may be freely used and modified for any purpose\n // providing that this copyright notice is included with it.\n // SoftSurfer makes no warranty for this code, and cannot be held\n // liable for any real or imagined damage resulting from its use.\n // Users of this code must verify correctness for their application.\n let wn = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n if (y1 <= y) {\n if (y2 > y && (x2 - x1) * (y - y1) - (x - x1) * (y2 - y1) > 0) {\n wn++;\n }\n } else if (y2 <= y && (x2 - x1) * (y - y1) - (x - x1) * (y2 - y1) < 0) {\n wn--;\n }\n x1 = x2;\n y1 = y2;\n }\n return wn !== 0;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingsContainsXY(\n flatCoordinates,\n offset,\n ends,\n stride,\n x,\n y,\n) {\n if (ends.length === 0) {\n return false;\n }\n if (!linearRingContainsXY(flatCoordinates, offset, ends[0], stride, x, y)) {\n return false;\n }\n for (let i = 1, ii = ends.length; i < ii; ++i) {\n if (\n linearRingContainsXY(flatCoordinates, ends[i - 1], ends[i], stride, x, y)\n ) {\n return false;\n }\n }\n return true;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingssContainsXY(\n flatCoordinates,\n offset,\n endss,\n stride,\n x,\n y,\n) {\n if (endss.length === 0) {\n return false;\n }\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n return true;\n }\n offset = ends[ends.length - 1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/segments\n */\n\n/**\n * This function calls `callback` for each segment of the flat coordinates\n * array. If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {function(import(\"../../coordinate.js\").Coordinate, import(\"../../coordinate.js\").Coordinate): T} callback Function\n * called for each segment.\n * @return {T|boolean} Value.\n * @template T\n */\nexport function forEach(flatCoordinates, offset, end, stride, callback) {\n let ret;\n offset += stride;\n for (; offset < end; offset += stride) {\n ret = callback(\n flatCoordinates.slice(offset - stride, offset),\n flatCoordinates.slice(offset, offset + stride),\n );\n if (ret) {\n return ret;\n }\n }\n return false;\n}\n\n/**\n * Calculate the intersection point of two line segments.\n * Reference: https://stackoverflow.com/a/72474223/2389327\n * @param {Array} segment1 The first line segment as an array of two points.\n * @param {Array} segment2 The second line segment as an array of two points.\n * @return {import(\"../../coordinate.js\").Coordinate|undefined} The intersection point or `undefined` if no intersection.\n */\nexport function getIntersectionPoint(segment1, segment2) {\n const [a, b] = segment1;\n const [c, d] = segment2;\n const t =\n ((a[0] - c[0]) * (c[1] - d[1]) - (a[1] - c[1]) * (c[0] - d[0])) /\n ((a[0] - b[0]) * (c[1] - d[1]) - (a[1] - b[1]) * (c[0] - d[0]));\n const u =\n ((a[0] - c[0]) * (a[1] - b[1]) - (a[1] - c[1]) * (a[0] - b[0])) /\n ((a[0] - b[0]) * (c[1] - d[1]) - (a[1] - b[1]) * (c[0] - d[0]));\n\n // Check if lines actually intersect\n if (0 <= t && t <= 1 && 0 <= u && u <= 1) {\n return [a[0] + t * (b[0] - a[0]), a[1] + t * (b[1] - a[1])];\n }\n return undefined;\n}\n","/**\n * @module ol/geom/flat/intersectsextent\n */\nimport {\n createEmpty,\n extendFlatCoordinates,\n intersects,\n intersectsSegment,\n} from '../../extent.js';\nimport {linearRingContainsExtent, linearRingContainsXY} from './contains.js';\nimport {forEach as forEachSegment} from './segments.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @param {import('../../extent.js').Extent} [coordinatesExtent] Coordinates extent\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineString(\n flatCoordinates,\n offset,\n end,\n stride,\n extent,\n coordinatesExtent,\n) {\n coordinatesExtent =\n coordinatesExtent ??\n extendFlatCoordinates(createEmpty(), flatCoordinates, offset, end, stride);\n if (!intersects(extent, coordinatesExtent)) {\n return false;\n }\n if (\n (coordinatesExtent[0] >= extent[0] && coordinatesExtent[2] <= extent[2]) ||\n (coordinatesExtent[1] >= extent[1] && coordinatesExtent[3] <= extent[3])\n ) {\n return true;\n }\n return forEachSegment(\n flatCoordinates,\n offset,\n end,\n stride,\n /**\n * @param {import(\"../../coordinate.js\").Coordinate} point1 Start point.\n * @param {import(\"../../coordinate.js\").Coordinate} point2 End point.\n * @return {boolean} `true` if the segment and the extent intersect,\n * `false` otherwise.\n */\n function (point1, point2) {\n return intersectsSegment(extent, point1, point2);\n },\n );\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineStringArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n extent,\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n if (\n intersectsLineString(flatCoordinates, offset, ends[i], stride, extent)\n ) {\n return true;\n }\n offset = ends[i];\n }\n return false;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRing(\n flatCoordinates,\n offset,\n end,\n stride,\n extent,\n) {\n if (intersectsLineString(flatCoordinates, offset, end, stride, extent)) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[0],\n extent[1],\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[0],\n extent[3],\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[2],\n extent[1],\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[2],\n extent[3],\n )\n ) {\n return true;\n }\n return false;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n extent,\n) {\n if (!intersectsLinearRing(flatCoordinates, offset, ends[0], stride, extent)) {\n return false;\n }\n if (ends.length === 1) {\n return true;\n }\n for (let i = 1, ii = ends.length; i < ii; ++i) {\n if (\n linearRingContainsExtent(\n flatCoordinates,\n ends[i - 1],\n ends[i],\n stride,\n extent,\n )\n ) {\n if (\n !intersectsLineString(\n flatCoordinates,\n ends[i - 1],\n ends[i],\n stride,\n extent,\n )\n ) {\n return false;\n }\n }\n }\n return true;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n extent,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (\n intersectsLinearRingArray(flatCoordinates, offset, ends, stride, extent)\n ) {\n return true;\n }\n offset = ends[ends.length - 1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/simplify\n */\n// Based on simplify-js https://github.com/mourner/simplify-js\n// Copyright (c) 2012, Vladimir Agafonkin\n// All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are met:\n//\n// 1. Redistributions of source code must retain the above copyright notice,\n// this list of conditions and the following disclaimer.\n//\n// 2. Redistributions in binary form must reproduce the above copyright\n// notice, this list of conditions and the following disclaimer in the\n// documentation and/or other materials provided with the distribution.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE\n// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\n// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\n// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\n// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n// POSSIBILITY OF SUCH DAMAGE.\n\nimport {squaredDistance, squaredSegmentDistance} from '../../math.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {boolean} highQuality Highest quality.\n * @param {Array} [simplifiedFlatCoordinates] Simplified flat\n * coordinates.\n * @return {Array} Simplified line string.\n */\nexport function simplifyLineString(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n highQuality,\n simplifiedFlatCoordinates,\n) {\n simplifiedFlatCoordinates =\n simplifiedFlatCoordinates !== undefined ? simplifiedFlatCoordinates : [];\n if (!highQuality) {\n end = radialDistance(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n flatCoordinates = simplifiedFlatCoordinates;\n offset = 0;\n stride = 2;\n }\n simplifiedFlatCoordinates.length = douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n return simplifiedFlatCoordinates;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n) {\n const n = (end - offset) / stride;\n if (n < 3) {\n for (; offset < end; offset += stride) {\n simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + 1];\n }\n return simplifiedOffset;\n }\n /** @type {Array} */\n const markers = new Array(n);\n markers[0] = 1;\n markers[n - 1] = 1;\n /** @type {Array} */\n const stack = [offset, end - stride];\n let index = 0;\n while (stack.length > 0) {\n const last = stack.pop();\n const first = stack.pop();\n let maxSquaredDistance = 0;\n const x1 = flatCoordinates[first];\n const y1 = flatCoordinates[first + 1];\n const x2 = flatCoordinates[last];\n const y2 = flatCoordinates[last + 1];\n for (let i = first + stride; i < last; i += stride) {\n const x = flatCoordinates[i];\n const y = flatCoordinates[i + 1];\n const squaredDistance = squaredSegmentDistance(x, y, x1, y1, x2, y2);\n if (squaredDistance > maxSquaredDistance) {\n index = i;\n maxSquaredDistance = squaredDistance;\n }\n }\n if (maxSquaredDistance > squaredTolerance) {\n markers[(index - offset) / stride] = 1;\n if (first + stride < index) {\n stack.push(first, index);\n }\n if (index + stride < last) {\n stack.push(index, last);\n }\n }\n }\n for (let i = 0; i < n; ++i) {\n if (markers[i]) {\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + i * stride];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + i * stride + 1];\n }\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds,\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n simplifiedOffset = douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n );\n simplifiedEnds.push(simplifiedOffset);\n offset = end;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEndss,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n /** @type {Array} */\n const simplifiedEnds = [];\n simplifiedOffset = douglasPeuckerArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds,\n );\n simplifiedEndss.push(simplifiedEnds);\n offset = ends[ends.length - 1];\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function radialDistance(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n) {\n if (end <= offset + stride) {\n // zero or one point, no simplification possible, so copy and return\n for (; offset < end; offset += stride) {\n simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + 1];\n }\n return simplifiedOffset;\n }\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n // copy first point\n simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n let x2 = x1;\n let y2 = y1;\n for (offset += stride; offset < end; offset += stride) {\n x2 = flatCoordinates[offset];\n y2 = flatCoordinates[offset + 1];\n if (squaredDistance(x1, y1, x2, y2) > squaredTolerance) {\n // copy point at offset\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n x1 = x2;\n y1 = y2;\n }\n }\n if (x2 != x1 || y2 != y1) {\n // copy last point\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {number} value Value.\n * @param {number} tolerance Tolerance.\n * @return {number} Rounded value.\n */\nexport function snap(value, tolerance) {\n return tolerance * Math.round(value / tolerance);\n}\n\n/**\n * Simplifies a line string using an algorithm designed by Tim Schaub.\n * Coordinates are snapped to the nearest value in a virtual grid and\n * consecutive duplicate coordinates are discarded. This effectively preserves\n * topology as the simplification of any subsection of a line string is\n * independent of the rest of the line string. This means that, for examples,\n * the common edge between two polygons will be simplified to the same line\n * string independently in both polygons. This implementation uses a single\n * pass over the coordinates and eliminates intermediate collinear points.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function quantize(\n flatCoordinates,\n offset,\n end,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n) {\n // do nothing if the line is empty\n if (offset == end) {\n return simplifiedOffset;\n }\n // snap the first coordinate (P1)\n let x1 = snap(flatCoordinates[offset], tolerance);\n let y1 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n // add the first coordinate to the output\n simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n // find the next coordinate that does not snap to the same value as the first\n // coordinate (P2)\n let x2, y2;\n do {\n x2 = snap(flatCoordinates[offset], tolerance);\n y2 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n if (offset == end) {\n // all coordinates snap to the same value, the line collapses to a point\n // push the last snapped value anyway to ensure that the output contains\n // at least two points\n // FIXME should we really return at least two points anyway?\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n return simplifiedOffset;\n }\n } while (x2 == x1 && y2 == y1);\n while (offset < end) {\n // snap the next coordinate (P3)\n const x3 = snap(flatCoordinates[offset], tolerance);\n const y3 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n // skip P3 if it is equal to P2\n if (x3 == x2 && y3 == y2) {\n continue;\n }\n // calculate the delta between P1 and P2\n const dx1 = x2 - x1;\n const dy1 = y2 - y1;\n // calculate the delta between P3 and P1\n const dx2 = x3 - x1;\n const dy2 = y3 - y1;\n // if P1, P2, and P3 are colinear and P3 is further from P1 than P2 is from\n // P1 in the same direction then P2 is on the straight line between P1 and\n // P3\n if (\n dx1 * dy2 == dy1 * dx2 &&\n ((dx1 < 0 && dx2 < dx1) || dx1 == dx2 || (dx1 > 0 && dx2 > dx1)) &&\n ((dy1 < 0 && dy2 < dy1) || dy1 == dy2 || (dy1 > 0 && dy2 > dy1))\n ) {\n // discard P2 and set P2 = P3\n x2 = x3;\n y2 = y3;\n continue;\n }\n // either P1, P2, and P3 are not colinear, or they are colinear but P3 is\n // between P3 and P1 or on the opposite half of the line to P2. add P2,\n // and continue with P1 = P2 and P2 = P3\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n x1 = x2;\n y1 = y2;\n x2 = x3;\n y2 = y3;\n }\n // add the last point (P2)\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function quantizeArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds,\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n simplifiedOffset = quantize(\n flatCoordinates,\n offset,\n end,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n );\n simplifiedEnds.push(simplifiedOffset);\n offset = end;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function quantizeMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEndss,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n /** @type {Array} */\n const simplifiedEnds = [];\n simplifiedOffset = quantizeArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds,\n );\n simplifiedEndss.push(simplifiedEnds);\n offset = ends[ends.length - 1];\n }\n return simplifiedOffset;\n}\n","/**\n * @module ol/geom/LinearRing\n */\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRing as linearRingArea} from './flat/area.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {intersectsLineString} from './flat/intersectsextent.js';\nimport {douglasPeucker} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Linear ring geometry. Only used as part of polygon; cannot be rendered\n * on its own.\n *\n * @api\n */\nclass LinearRing extends SimpleGeometry {\n /**\n * @param {Array|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n if (layout !== undefined && !Array.isArray(coordinates[0])) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n } else {\n this.setCoordinates(\n /** @type {Array} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!LinearRing} Clone.\n * @api\n * @override\n */\n clone() {\n return new LinearRing(this.flatCoordinates.slice(), this.layout);\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n maxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestPoint(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n this.maxDelta_,\n true,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * Return the area of the linear ring on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\n getArea() {\n return linearRingArea(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * Return the coordinates of the linear ring.\n * @return {Array} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return inflateCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {LinearRing} Simplified LinearRing.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n simplifiedFlatCoordinates.length = douglasPeucker(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n return new LinearRing(simplifiedFlatCoordinates, 'XY');\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'LinearRing';\n }\n\n /**\n * Test if the geometry and the passed extent intersect. A linear ring is\n * treated as a line string for this test.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLineString(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n extent,\n );\n }\n\n /**\n * Set the coordinates of the linear ring.\n * @param {!Array} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n );\n this.changed();\n }\n}\n\nexport default LinearRing;\n","/**\n * @module ol/geom/Point\n */\nimport {containsXY, createOrUpdateFromCoordinate} from '../extent.js';\nimport {squaredDistance as squaredDx} from '../math.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {deflateCoordinate} from './flat/deflate.js';\n\n/**\n * @classdesc\n * Point geometry.\n *\n * @api\n */\nclass Point extends SimpleGeometry {\n /**\n * @param {import(\"../coordinate.js\").Coordinate} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n this.setCoordinates(coordinates, layout);\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!Point} Clone.\n * @api\n * @override\n */\n clone() {\n const point = new Point(this.flatCoordinates.slice(), this.layout);\n point.applyProperties(this);\n return point;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n const flatCoordinates = this.flatCoordinates;\n const squaredDistance = squaredDx(\n x,\n y,\n flatCoordinates[0],\n flatCoordinates[1],\n );\n if (squaredDistance < minSquaredDistance) {\n const stride = this.stride;\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[i];\n }\n closestPoint.length = stride;\n return squaredDistance;\n }\n return minSquaredDistance;\n }\n\n /**\n * Return the coordinate of the point.\n * @return {import(\"../coordinate.js\").Coordinate} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return this.flatCoordinates.slice();\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n * @override\n */\n computeExtent(extent) {\n return createOrUpdateFromCoordinate(this.flatCoordinates, extent);\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'Point';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return containsXY(extent, this.flatCoordinates[0], this.flatCoordinates[1]);\n }\n\n /**\n * @param {!Array<*>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 0);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinate(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n );\n this.changed();\n }\n}\n\nexport default Point;\n","/**\n * @module ol/geom/flat/interiorpoint\n */\nimport {ascending} from '../../array.js';\nimport {linearRingsContainsXY} from './contains.js';\n\n/**\n * Calculates a point that is likely to lie in the interior of the linear rings.\n * Inspired by JTS's com.vividsolutions.jts.geom.Geometry#getInteriorPoint.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {Array} flatCenters Flat centers.\n * @param {number} flatCentersOffset Flat center offset.\n * @param {Array} [dest] Destination.\n * @return {Array} Destination point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointOfArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n flatCenters,\n flatCentersOffset,\n dest,\n) {\n let i, ii, x, x1, x2, y1, y2;\n const y = flatCenters[flatCentersOffset + 1];\n /** @type {Array} */\n const intersections = [];\n // Calculate intersections with the horizontal line\n for (let r = 0, rr = ends.length; r < rr; ++r) {\n const end = ends[r];\n x1 = flatCoordinates[end - stride];\n y1 = flatCoordinates[end - stride + 1];\n for (i = offset; i < end; i += stride) {\n x2 = flatCoordinates[i];\n y2 = flatCoordinates[i + 1];\n if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {\n x = ((y - y1) / (y2 - y1)) * (x2 - x1) + x1;\n intersections.push(x);\n }\n x1 = x2;\n y1 = y2;\n }\n }\n // Find the longest segment of the horizontal line that has its center point\n // inside the linear ring.\n let pointX = NaN;\n let maxSegmentLength = -Infinity;\n intersections.sort(ascending);\n x1 = intersections[0];\n for (i = 1, ii = intersections.length; i < ii; ++i) {\n x2 = intersections[i];\n const segmentLength = Math.abs(x2 - x1);\n if (segmentLength > maxSegmentLength) {\n x = (x1 + x2) / 2;\n if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n pointX = x;\n maxSegmentLength = segmentLength;\n }\n }\n x1 = x2;\n }\n if (isNaN(pointX)) {\n // There is no horizontal line that has its center point inside the linear\n // ring. Use the center of the the linear ring's extent.\n pointX = flatCenters[flatCentersOffset];\n }\n if (dest) {\n dest.push(pointX, y, maxSegmentLength);\n return dest;\n }\n return [pointX, y, maxSegmentLength];\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array} flatCenters Flat centers.\n * @return {Array} Interior points as XYM coordinates, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointsOfMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n flatCenters,\n) {\n /** @type {Array} */\n let interiorPoints = [];\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n interiorPoints = getInteriorPointOfArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n flatCenters,\n 2 * i,\n interiorPoints,\n );\n offset = ends[ends.length - 1];\n }\n return interiorPoints;\n}\n","/**\n * @module ol/geom/flat/reverse\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nexport function coordinates(flatCoordinates, offset, end, stride) {\n while (offset < end - stride) {\n for (let i = 0; i < stride; ++i) {\n const tmp = flatCoordinates[offset + i];\n flatCoordinates[offset + i] = flatCoordinates[end - stride + i];\n flatCoordinates[end - stride + i] = tmp;\n }\n offset += stride;\n end -= stride;\n }\n}\n","/**\n * @module ol/geom/flat/orient\n */\nimport {coordinates as reverseCoordinates} from './reverse.js';\n\n/**\n * Is the linear ring oriented clockwise in a coordinate system with a bottom-left\n * coordinate origin? For a coordinate system with a top-left coordinate origin,\n * the ring's orientation is clockwise when this function returns false.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean|undefined} Is clockwise.\n */\nexport function linearRingIsClockwise(flatCoordinates, offset, end, stride) {\n // https://stackoverflow.com/q/1165647/clockwise-method#1165943\n // https://github.com/OSGeo/gdal/blob/master/gdal/ogr/ogrlinearring.cpp\n let edge = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n edge += (x2 - x1) * (y2 + y1);\n x1 = x2;\n y1 = y2;\n }\n return edge === 0 ? undefined : edge > 0;\n}\n\n/**\n * Determines if linear rings are oriented. By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Test for right-hand orientation\n * (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingsAreOriented(\n flatCoordinates,\n offset,\n ends,\n stride,\n right,\n) {\n right = right !== undefined ? right : false;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const isClockwise = linearRingIsClockwise(\n flatCoordinates,\n offset,\n end,\n stride,\n );\n if (i === 0) {\n if ((right && isClockwise) || (!right && !isClockwise)) {\n return false;\n }\n } else {\n if ((right && !isClockwise) || (!right && isClockwise)) {\n return false;\n }\n }\n offset = end;\n }\n return true;\n}\n\n/**\n * Determines if linear rings are oriented. By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Test for right-hand orientation\n * (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingssAreOriented(\n flatCoordinates,\n offset,\n endss,\n stride,\n right,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (!linearRingsAreOriented(flatCoordinates, offset, ends, stride, right)) {\n return false;\n }\n if (ends.length) {\n offset = ends[ends.length - 1];\n }\n }\n return true;\n}\n\n/**\n * Orient coordinates in a flat array of linear rings. By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings). To orient according to the\n * right-hand rule, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {boolean} [right] Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRings(\n flatCoordinates,\n offset,\n ends,\n stride,\n right,\n) {\n right = right !== undefined ? right : false;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const isClockwise = linearRingIsClockwise(\n flatCoordinates,\n offset,\n end,\n stride,\n );\n const reverse =\n i === 0\n ? (right && isClockwise) || (!right && !isClockwise)\n : (right && !isClockwise) || (!right && isClockwise);\n if (reverse) {\n reverseCoordinates(flatCoordinates, offset, end, stride);\n }\n offset = end;\n }\n return offset;\n}\n\n/**\n * Orient coordinates in a flat array of linear rings. By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings). To orient according to the\n * right-hand rule, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRingsArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n right,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n offset = orientLinearRings(\n flatCoordinates,\n offset,\n endss[i],\n stride,\n right,\n );\n }\n return offset;\n}\n\n/**\n * Return a two-dimensional endss\n * @param {Array} flatCoordinates Flat coordinates\n * @param {Array} ends Linear ring end indexes\n * @return {Array>} Two dimensional endss array that can\n * be used to construct a MultiPolygon\n */\nexport function inflateEnds(flatCoordinates, ends) {\n const endss = [];\n let offset = 0;\n let prevEndIndex = 0;\n let startOrientation;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n // classifies an array of rings into polygons with outer rings and holes\n const orientation = linearRingIsClockwise(flatCoordinates, offset, end, 2);\n if (startOrientation === undefined) {\n startOrientation = orientation;\n }\n if (orientation === startOrientation) {\n endss.push(ends.slice(prevEndIndex, i + 1));\n } else {\n if (endss.length === 0) {\n continue;\n }\n endss[endss.length - 1].push(ends[prevEndIndex]);\n }\n prevEndIndex = i + 1;\n offset = end;\n }\n return endss;\n}\n","/**\n * @module ol/geom/Polygon\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, getCenter, isEmpty} from '../extent.js';\nimport {modulo} from '../math.js';\nimport {offset as sphereOffset} from '../sphere.js';\nimport LinearRing from './LinearRing.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRings as linearRingsArea} from './flat/area.js';\nimport {arrayMaxSquaredDelta, assignClosestArrayPoint} from './flat/closest.js';\nimport {linearRingsContainsXY} from './flat/contains.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {getInteriorPointOfArray} from './flat/interiorpoint.js';\nimport {intersectsLinearRingArray} from './flat/intersectsextent.js';\nimport {linearRingsAreOriented, orientLinearRings} from './flat/orient.js';\nimport {quantizeArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Polygon geometry.\n *\n * @api\n */\nclass Polygon extends SimpleGeometry {\n /**\n * @param {!Array>|!Array} coordinates\n * Array of linear rings that define the polygon. The first linear ring of the\n * array defines the outer-boundary or surface of the polygon. Each subsequent\n * linear ring defines a hole in the surface of the polygon. A linear ring is\n * an array of vertices' coordinates where the first coordinate and the last are\n * equivalent. (For internal use, flat coordinates in combination with\n * `layout` and `ends` are also accepted.)\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @param {Array} [ends] Ends (for internal use with flat coordinates).\n */\n constructor(coordinates, layout, ends) {\n super();\n\n /**\n * @type {Array}\n * @private\n */\n this.ends_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.flatInteriorPointRevision_ = -1;\n\n /**\n * @private\n * @type {import(\"../coordinate.js\").Coordinate|null}\n */\n this.flatInteriorPoint_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.orientedRevision_ = -1;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.orientedFlatCoordinates_ = null;\n\n if (layout !== undefined && ends) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n this.ends_ = ends;\n } else {\n this.setCoordinates(\n /** @type {Array>} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Append the passed linear ring to this polygon.\n * @param {LinearRing} linearRing Linear ring.\n * @api\n */\n appendLinearRing(linearRing) {\n if (!this.flatCoordinates) {\n this.flatCoordinates = linearRing.getFlatCoordinates().slice();\n } else {\n extend(this.flatCoordinates, linearRing.getFlatCoordinates());\n }\n this.ends_.push(this.flatCoordinates.length);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!Polygon} Clone.\n * @api\n * @override\n */\n clone() {\n const polygon = new Polygon(\n this.flatCoordinates.slice(),\n this.layout,\n this.ends_.slice(),\n );\n polygon.applyProperties(this);\n return polygon;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n arrayMaxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestArrayPoint(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n this.maxDelta_,\n true,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n * @override\n */\n containsXY(x, y) {\n return linearRingsContainsXY(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n x,\n y,\n );\n }\n\n /**\n * Return the area of the polygon on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\n getArea() {\n return linearRingsArea(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n );\n }\n\n /**\n * Get the coordinate array for this geometry. This array has the structure\n * of a GeoJSON coordinate array for polygons.\n *\n * @param {boolean} [right] Orient coordinates according to the right-hand\n * rule (counter-clockwise for exterior and clockwise for interior rings).\n * If `false`, coordinates will be oriented according to the left-hand rule\n * (clockwise for exterior and counter-clockwise for interior rings).\n * By default, coordinate orientation will depend on how the geometry was\n * constructed.\n * @return {Array>} Coordinates.\n * @api\n * @override\n */\n getCoordinates(right) {\n let flatCoordinates;\n if (right !== undefined) {\n flatCoordinates = this.getOrientedFlatCoordinates().slice();\n orientLinearRings(flatCoordinates, 0, this.ends_, this.stride, right);\n } else {\n flatCoordinates = this.flatCoordinates;\n }\n\n return inflateCoordinatesArray(flatCoordinates, 0, this.ends_, this.stride);\n }\n\n /**\n * @return {Array} Ends.\n */\n getEnds() {\n return this.ends_;\n }\n\n /**\n * @return {Array} Interior point.\n */\n getFlatInteriorPoint() {\n if (this.flatInteriorPointRevision_ != this.getRevision()) {\n const flatCenter = getCenter(this.getExtent());\n this.flatInteriorPoint_ = getInteriorPointOfArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n flatCenter,\n 0,\n );\n this.flatInteriorPointRevision_ = this.getRevision();\n }\n return /** @type {import(\"../coordinate.js\").Coordinate} */ (\n this.flatInteriorPoint_\n );\n }\n\n /**\n * Return an interior point of the polygon.\n * @return {Point} Interior point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n * @api\n */\n getInteriorPoint() {\n return new Point(this.getFlatInteriorPoint(), 'XYM');\n }\n\n /**\n * Return the number of rings of the polygon, this includes the exterior\n * ring and any interior rings.\n *\n * @return {number} Number of rings.\n * @api\n */\n getLinearRingCount() {\n return this.ends_.length;\n }\n\n /**\n * Return the Nth linear ring of the polygon geometry. Return `null` if the\n * given index is out of range.\n * The exterior linear ring is available at index `0` and the interior rings\n * at index `1` and beyond.\n *\n * @param {number} index Index.\n * @return {LinearRing|null} Linear ring.\n * @api\n */\n getLinearRing(index) {\n if (index < 0 || this.ends_.length <= index) {\n return null;\n }\n return new LinearRing(\n this.flatCoordinates.slice(\n index === 0 ? 0 : this.ends_[index - 1],\n this.ends_[index],\n ),\n this.layout,\n );\n }\n\n /**\n * Return the linear rings of the polygon.\n * @return {Array} Linear rings.\n * @api\n */\n getLinearRings() {\n const layout = this.layout;\n const flatCoordinates = this.flatCoordinates;\n const ends = this.ends_;\n const linearRings = [];\n let offset = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const linearRing = new LinearRing(\n flatCoordinates.slice(offset, end),\n layout,\n );\n linearRings.push(linearRing);\n offset = end;\n }\n return linearRings;\n }\n\n /**\n * @return {Array} Oriented flat coordinates.\n */\n getOrientedFlatCoordinates() {\n if (this.orientedRevision_ != this.getRevision()) {\n const flatCoordinates = this.flatCoordinates;\n if (linearRingsAreOriented(flatCoordinates, 0, this.ends_, this.stride)) {\n this.orientedFlatCoordinates_ = flatCoordinates;\n } else {\n this.orientedFlatCoordinates_ = flatCoordinates.slice();\n this.orientedFlatCoordinates_.length = orientLinearRings(\n this.orientedFlatCoordinates_,\n 0,\n this.ends_,\n this.stride,\n );\n }\n this.orientedRevision_ = this.getRevision();\n }\n return /** @type {Array} */ (this.orientedFlatCoordinates_);\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Polygon} Simplified Polygon.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n /** @type {Array} */\n const simplifiedEnds = [];\n simplifiedFlatCoordinates.length = quantizeArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds,\n );\n return new Polygon(simplifiedFlatCoordinates, 'XY', simplifiedEnds);\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'Polygon';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLinearRingArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n extent,\n );\n }\n\n /**\n * Set the coordinates of the polygon.\n * @param {!Array>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 2);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const ends = deflateCoordinatesArray(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n this.ends_,\n );\n this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n this.changed();\n }\n}\n\nexport default Polygon;\n\n/**\n * Create an approximation of a circle on the surface of a sphere.\n * @param {import(\"../coordinate.js\").Coordinate} center Center (`[lon, lat]` in degrees).\n * @param {number} radius The great-circle distance from the center to\n * the polygon vertices in meters.\n * @param {number} [n] Optional number of vertices for the resulting\n * polygon. Default is `32`.\n * @param {number} [sphereRadius] Optional radius for the sphere (defaults to\n * the Earth's mean radius using the WGS84 ellipsoid).\n * @return {Polygon} The \"circular\" polygon.\n * @api\n */\nexport function circular(center, radius, n, sphereRadius) {\n n = n ? n : 32;\n /** @type {Array} */\n const flatCoordinates = [];\n for (let i = 0; i < n; ++i) {\n extend(\n flatCoordinates,\n sphereOffset(center, radius, (2 * Math.PI * i) / n, sphereRadius),\n );\n }\n flatCoordinates.push(flatCoordinates[0], flatCoordinates[1]);\n return new Polygon(flatCoordinates, 'XY', [flatCoordinates.length]);\n}\n\n/**\n * Create a polygon from an extent. The layout used is `XY`.\n * @param {import(\"../extent.js\").Extent} extent The extent.\n * @return {Polygon} The polygon.\n * @api\n */\nexport function fromExtent(extent) {\n if (isEmpty(extent)) {\n throw new Error('Cannot create polygon from empty extent');\n }\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const flatCoordinates = [\n minX,\n minY,\n minX,\n maxY,\n maxX,\n maxY,\n maxX,\n minY,\n minX,\n minY,\n ];\n return new Polygon(flatCoordinates, 'XY', [flatCoordinates.length]);\n}\n\n/**\n * Create a regular polygon from a circle.\n * @param {import(\"./Circle.js\").default} circle Circle geometry.\n * @param {number} [sides] Number of sides of the polygon. Default is 32.\n * @param {number} [angle] Start angle for the first vertex of the polygon in\n * counter-clockwise radians. 0 means East. Default is 0.\n * @return {Polygon} Polygon geometry.\n * @api\n */\nexport function fromCircle(circle, sides, angle) {\n sides = sides ? sides : 32;\n const stride = circle.getStride();\n const layout = circle.getLayout();\n const center = circle.getCenter();\n const arrayLength = stride * (sides + 1);\n const flatCoordinates = new Array(arrayLength);\n for (let i = 0; i < arrayLength; i += stride) {\n flatCoordinates[i] = 0;\n flatCoordinates[i + 1] = 0;\n for (let j = 2; j < stride; j++) {\n flatCoordinates[i + j] = center[j];\n }\n }\n const ends = [flatCoordinates.length];\n const polygon = new Polygon(flatCoordinates, layout, ends);\n makeRegular(polygon, center, circle.getRadius(), angle);\n return polygon;\n}\n\n/**\n * Modify the coordinates of a polygon to make it a regular polygon.\n * @param {Polygon} polygon Polygon geometry.\n * @param {import(\"../coordinate.js\").Coordinate} center Center of the regular polygon.\n * @param {number} radius Radius of the regular polygon.\n * @param {number} [angle] Start angle for the first vertex of the polygon in\n * counter-clockwise radians. 0 means East. Default is 0.\n */\nexport function makeRegular(polygon, center, radius, angle) {\n const flatCoordinates = polygon.getFlatCoordinates();\n const stride = polygon.getStride();\n const sides = flatCoordinates.length / stride - 1;\n const startAngle = angle ? angle : 0;\n for (let i = 0; i <= sides; ++i) {\n const offset = i * stride;\n const angle = startAngle + (modulo(i, sides) * 2 * Math.PI) / sides;\n flatCoordinates[offset] = center[0] + radius * Math.cos(angle);\n flatCoordinates[offset + 1] = center[1] + radius * Math.sin(angle);\n }\n polygon.changed();\n}\n","/**\n * @module ol/ImageState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n IDLE: 0,\n LOADING: 1,\n LOADED: 2,\n ERROR: 3,\n EMPTY: 4,\n};\n","/**\n * @module ol/has\n */\n\nconst ua =\n typeof navigator !== 'undefined' && typeof navigator.userAgent !== 'undefined'\n ? navigator.userAgent.toLowerCase()\n : '';\n\n/**\n * User agent string says we are dealing with Safari as browser.\n * @type {boolean}\n */\nexport const SAFARI = ua.includes('safari') && !ua.includes('chrom');\n\n/**\n * https://bugs.webkit.org/show_bug.cgi?id=237906\n * @type {boolean}\n */\nexport const SAFARI_BUG_237906 =\n SAFARI &&\n (ua.includes('version/15.4') ||\n /cpu (os|iphone os) 15_4 like mac os x/.test(ua));\n\n/**\n * User agent string says we are dealing with a WebKit engine.\n * @type {boolean}\n */\nexport const WEBKIT = ua.includes('webkit') && !ua.includes('edge');\n\n/**\n * User agent string says we are dealing with a Mac as platform.\n * @type {boolean}\n */\nexport const MAC = ua.includes('macintosh');\n\n/**\n * The ratio between physical pixels and device-independent pixels\n * (dips) on the device (`window.devicePixelRatio`).\n * @const\n * @type {number}\n * @api\n */\nexport const DEVICE_PIXEL_RATIO =\n typeof devicePixelRatio !== 'undefined' ? devicePixelRatio : 1;\n\n/**\n * The execution context is a worker with OffscreenCanvas available.\n * @const\n * @type {boolean}\n */\nexport const WORKER_OFFSCREEN_CANVAS =\n typeof WorkerGlobalScope !== 'undefined' &&\n typeof OffscreenCanvas !== 'undefined' &&\n self instanceof WorkerGlobalScope; //eslint-disable-line\n\n/**\n * Image.prototype.decode() is supported.\n * @type {boolean}\n */\nexport const IMAGE_DECODE =\n typeof Image !== 'undefined' && Image.prototype.decode;\n\n/**\n * createImageBitmap() is supported.\n * @type {boolean}\n */\nexport const CREATE_IMAGE_BITMAP = typeof createImageBitmap === 'function';\n\n/**\n * @type {boolean}\n */\nexport const PASSIVE_EVENT_LISTENERS = (function () {\n let passive = false;\n try {\n const options = Object.defineProperty({}, 'passive', {\n get: function () {\n passive = true;\n },\n });\n\n // @ts-ignore Ignore invalid event type '_'\n window.addEventListener('_', null, options);\n // @ts-ignore Ignore invalid event type '_'\n window.removeEventListener('_', null, options);\n } catch {\n // passive not supported\n }\n return passive;\n})();\n","/**\n * @module ol/Image\n */\nimport ImageState from './ImageState.js';\nimport {listenOnce, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\nimport EventTarget from './events/Target.js';\nimport {toPromise} from './functions.js';\nimport {CREATE_IMAGE_BITMAP, IMAGE_DECODE} from './has.js';\n\n/**\n * A function that takes an {@link module:ol/Image~ImageWrapper} for the image and a\n * `{string}` for the src as arguments. It is supposed to make it so the\n * underlying image {@link module:ol/Image~ImageWrapper#getImage} is assigned the\n * content specified by the src. If not specified, the default is\n *\n * function(image, src) {\n * image.getImage().src = src;\n * }\n *\n * Providing a custom `imageLoadFunction` can be useful to load images with\n * post requests or - in general - through XHR requests, where the src of the\n * image element would be set to a data URI when the content is loaded.\n *\n * @typedef {function(import(\"./Image.js\").default, string): void} LoadFunction\n * @api\n */\n\n/**\n * @typedef {Object} ImageObject\n * @property {import(\"./extent.js\").Extent} [extent] Extent, if different from the requested one.\n * @property {import(\"./resolution.js\").ResolutionLike} [resolution] Resolution, if different from the requested one.\n * When x and y resolution are different, use the array type (`[xResolution, yResolution]`).\n * @property {number} [pixelRatio] Pixel ratio, if different from the requested one.\n * @property {import('./DataTile.js').ImageLike} image Image.\n */\n\n/**\n * Loader function used for image sources. Receives extent, resolution and pixel ratio as arguments.\n * For images that cover any extent and resolution (static images), the loader function should not accept\n * any arguments. The function returns an {@link import(\"./DataTile.js\").ImageLike image}, an\n * {@link import(\"./Image.js\").ImageObject image object}, or a promise for the same.\n * For loaders that generate images, the promise should not resolve until the image is loaded.\n * If the returned image does not match the extent, resolution or pixel ratio passed to the loader,\n * it has to return an {@link import(\"./Image.js\").ImageObject image object} with the `image` and the\n * correct `extent`, `resolution` and `pixelRatio`.\n *\n * @typedef {function(import(\"./extent.js\").Extent, number, number, (function(HTMLImageElement, string): void)=): import(\"./DataTile.js\").ImageLike|ImageObject|Promise} Loader\n * @api\n */\n\n/**\n * Loader function used for image sources. Receives extent, resolution and pixel ratio as arguments.\n * The function returns a promise for an {@link import(\"./Image.js\").ImageObject image object}.\n *\n * @typedef {function(import(\"./extent.js\").Extent, number, number, (function(HTMLImageElement, string): void)=): Promise} ImageObjectPromiseLoader\n */\n\nclass ImageWrapper extends EventTarget {\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number|Array|undefined} resolution Resolution. If provided as array, x and y\n * resolution will be assumed.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./ImageState.js\").default|Loader} stateOrLoader State.\n */\n constructor(extent, resolution, pixelRatio, stateOrLoader) {\n super();\n\n /**\n * @protected\n * @type {import(\"./extent.js\").Extent}\n */\n this.extent = extent;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @protected\n * @type {number|Array|undefined}\n */\n this.resolution = resolution;\n\n /**\n * @protected\n * @type {import(\"./ImageState.js\").default}\n */\n this.state =\n typeof stateOrLoader === 'function' ? ImageState.IDLE : stateOrLoader;\n\n /**\n * @private\n * @type {import('./DataTile.js').ImageLike|null}\n */\n this.image_ = null;\n\n /**\n * @protected\n * @type {Loader|null}\n */\n this.loader = typeof stateOrLoader === 'function' ? stateOrLoader : null;\n }\n\n /**\n * @protected\n */\n changed() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * @return {import(\"./extent.js\").Extent} Extent.\n */\n getExtent() {\n return this.extent;\n }\n\n /**\n * @return {import('./DataTile.js').ImageLike} Image.\n */\n getImage() {\n return this.image_;\n }\n\n /**\n * @return {number} PixelRatio.\n */\n getPixelRatio() {\n return this.pixelRatio_;\n }\n\n /**\n * @return {number|Array} Resolution.\n */\n getResolution() {\n return /** @type {number} */ (this.resolution);\n }\n\n /**\n * @return {import(\"./ImageState.js\").default} State.\n */\n getState() {\n return this.state;\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.state == ImageState.IDLE) {\n if (this.loader) {\n this.state = ImageState.LOADING;\n this.changed();\n const resolution = this.getResolution();\n const requestResolution = Array.isArray(resolution)\n ? resolution[0]\n : resolution;\n toPromise(() =>\n this.loader(\n this.getExtent(),\n requestResolution,\n this.getPixelRatio(),\n ),\n )\n .then((image) => {\n if ('image' in image) {\n this.image_ = image.image;\n }\n if ('extent' in image) {\n this.extent = image.extent;\n }\n if ('resolution' in image) {\n this.resolution = image.resolution;\n }\n if ('pixelRatio' in image) {\n this.pixelRatio_ = image.pixelRatio;\n }\n if (\n image instanceof HTMLImageElement ||\n (CREATE_IMAGE_BITMAP && image instanceof ImageBitmap) ||\n image instanceof HTMLCanvasElement ||\n image instanceof HTMLVideoElement\n ) {\n this.image_ = image;\n }\n this.state = ImageState.LOADED;\n })\n .catch((error) => {\n this.state = ImageState.ERROR;\n console.error(error); // eslint-disable-line no-console\n })\n .finally(() => this.changed());\n }\n }\n }\n\n /**\n * @param {import('./DataTile.js').ImageLike} image The image.\n */\n setImage(image) {\n this.image_ = image;\n }\n\n /**\n * @param {number|Array} resolution Resolution.\n */\n setResolution(resolution) {\n this.resolution = resolution;\n }\n}\n\n/**\n * @param {import('./DataTile.js').ImageLike} image Image element.\n * @param {function():any} loadHandler Load callback function.\n * @param {function():any} errorHandler Error callback function.\n * @return {function():void} Callback to stop listening.\n */\nexport function listenImage(image, loadHandler, errorHandler) {\n const img = /** @type {HTMLImageElement} */ (image);\n let listening = true;\n let decoding = false;\n let loaded = false;\n\n const listenerKeys = [\n listenOnce(img, EventType.LOAD, function () {\n loaded = true;\n if (!decoding) {\n loadHandler();\n }\n }),\n ];\n\n if (img.src && IMAGE_DECODE) {\n decoding = true;\n img\n .decode()\n .then(function () {\n if (listening) {\n loadHandler();\n }\n })\n .catch(function (error) {\n if (listening) {\n if (loaded) {\n loadHandler();\n } else {\n errorHandler();\n }\n }\n });\n } else {\n listenerKeys.push(listenOnce(img, EventType.ERROR, errorHandler));\n }\n\n return function unlisten() {\n listening = false;\n listenerKeys.forEach(unlistenByKey);\n };\n}\n\n/**\n * Loads an image.\n * @param {HTMLImageElement} image Image, not yet loaded.\n * @param {string} [src] `src` attribute of the image. Optional, not required if already present.\n * @return {Promise} Promise resolving to an `HTMLImageElement`.\n * @api\n */\nexport function load(image, src) {\n return new Promise((resolve, reject) => {\n function handleLoad() {\n unlisten();\n resolve(image);\n }\n function handleError() {\n unlisten();\n reject(new Error('Image load error'));\n }\n function unlisten() {\n image.removeEventListener('load', handleLoad);\n image.removeEventListener('error', handleError);\n }\n image.addEventListener('load', handleLoad);\n image.addEventListener('error', handleError);\n if (src) {\n image.src = src;\n }\n });\n}\n\n/**\n * @param {HTMLImageElement} image Image, not yet loaded.\n * @param {string} [src] `src` attribute of the image. Optional, not required if already present.\n * @return {Promise} Promise resolving to an `HTMLImageElement`.\n */\nexport function decodeFallback(image, src) {\n if (src) {\n image.src = src;\n }\n return image.src && IMAGE_DECODE\n ? new Promise((resolve, reject) =>\n image\n .decode()\n .then(() => resolve(image))\n .catch((e) =>\n image.complete && image.width ? resolve(image) : reject(e),\n ),\n )\n : load(image);\n}\n\n/**\n * Loads an image and decodes it to an `ImageBitmap` if `createImageBitmap()` is supported. Returns\n * the loaded image otherwise.\n * @param {HTMLImageElement} image Image, not yet loaded.\n * @param {string} [src] `src` attribute of the image. Optional, not required if already present.\n * @return {Promise} Promise resolving to an `ImageBitmap` or an\n * `HTMLImageElement` if `createImageBitmap()` is not supported.\n * @api\n */\nexport function decode(image, src) {\n if (src) {\n image.src = src;\n }\n return image.src && IMAGE_DECODE && CREATE_IMAGE_BITMAP\n ? image\n .decode()\n .then(() => createImageBitmap(image))\n .catch((e) => {\n if (image.complete && image.width) {\n return image;\n }\n throw e;\n })\n : decodeFallback(image);\n}\n\nexport default ImageWrapper;\n","/**\n * @module ol/TileState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n IDLE: 0,\n LOADING: 1,\n LOADED: 2,\n /**\n * Indicates that tile loading failed\n * @type {number}\n */\n ERROR: 3,\n EMPTY: 4,\n};\n","/**\n * @module ol/easing\n */\n\n/**\n * Start slow and speed up.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeIn(t) {\n return Math.pow(t, 3);\n}\n\n/**\n * Start fast and slow down.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeOut(t) {\n return 1 - easeIn(1 - t);\n}\n\n/**\n * Start slow, speed up, and then slow down again.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function inAndOut(t) {\n return 3 * t * t - 2 * t * t * t;\n}\n\n/**\n * Maintain a constant speed over time.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function linear(t) {\n return t;\n}\n\n/**\n * Start slow, speed up, and at the very end slow down again. This has the\n * same general behavior as {@link module:ol/easing.inAndOut}, but the final\n * slowdown is delayed.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function upAndDown(t) {\n if (t < 0.5) {\n return inAndOut(2 * t);\n }\n return 1 - inAndOut(2 * (t - 0.5));\n}\n","/**\n * @module ol/Tile\n */\nimport TileState from './TileState.js';\nimport {easeIn} from './easing.js';\nimport EventType from './events/EventType.js';\nimport EventTarget from './events/Target.js';\nimport {abstract} from './util.js';\n\n/**\n * A function that takes a {@link module:ol/Tile~Tile} for the tile and a\n * `{string}` for the url as arguments. The default is\n * ```js\n * source.setTileLoadFunction(function(tile, src) {\n * tile.getImage().src = src;\n * });\n * ```\n * For more fine grained control, the load function can use fetch or XMLHttpRequest and involve\n * error handling:\n *\n * ```js\n * import TileState from 'ol/TileState.js';\n *\n * source.setTileLoadFunction(function(tile, src) {\n * const xhr = new XMLHttpRequest();\n * xhr.responseType = 'blob';\n * xhr.addEventListener('loadend', function (evt) {\n * const data = this.response;\n * if (data !== undefined) {\n * tile.getImage().src = URL.createObjectURL(data);\n * } else {\n * tile.setState(TileState.ERROR);\n * }\n * });\n * xhr.addEventListener('error', function () {\n * tile.setState(TileState.ERROR);\n * });\n * xhr.open('GET', src);\n * xhr.send();\n * });\n * ```\n *\n * @typedef {function(Tile, string): void} LoadFunction\n * @api\n */\n\n/**\n * {@link module:ol/source/Tile~TileSource} sources use a function of this type to get\n * the url that provides a tile for a given tile coordinate.\n *\n * This function takes a {@link module:ol/tilecoord~TileCoord} for the tile\n * coordinate, a `{number}` representing the pixel ratio and a\n * {@link module:ol/proj/Projection~Projection} for the projection as arguments\n * and returns a `{string}` representing the tile URL, or undefined if no tile\n * should be requested for the passed tile coordinate.\n *\n * @typedef {function(import(\"./tilecoord.js\").TileCoord, number,\n * import(\"./proj/Projection.js\").default): (string|undefined)} UrlFunction\n * @api\n */\n\n/**\n * @typedef {Object} Options\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n * @api\n */\n\n/**\n * @classdesc\n * Base class for tiles.\n *\n * @abstract\n */\nclass Tile extends EventTarget {\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./TileState.js\").default} state State.\n * @param {Options} [options] Tile options.\n */\n constructor(tileCoord, state, options) {\n super();\n\n options = options ? options : {};\n\n /**\n * @type {import(\"./tilecoord.js\").TileCoord}\n */\n this.tileCoord = tileCoord;\n\n /**\n * @protected\n * @type {import(\"./TileState.js\").default}\n */\n this.state = state;\n\n /**\n * A key assigned to the tile. This is used in conjunction with a source key\n * to determine if a cached version of this tile may be used by the renderer.\n * @type {string}\n */\n this.key = '';\n\n /**\n * The duration for the opacity transition.\n * @private\n * @type {number}\n */\n this.transition_ =\n options.transition === undefined ? 250 : options.transition;\n\n /**\n * Lookup of start times for rendering transitions. If the start time is\n * equal to -1, the transition is complete.\n * @private\n * @type {Object}\n */\n this.transitionStarts_ = {};\n\n /**\n * @type {boolean}\n */\n this.interpolate = !!options.interpolate;\n }\n\n /**\n * @protected\n */\n changed() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * Called by the tile cache when the tile is removed from the cache due to expiry\n */\n release() {\n // to remove the `change` listener on this tile in `ol/TileQueue#handleTileChange`\n this.setState(TileState.EMPTY);\n }\n\n /**\n * @return {string} Key.\n */\n getKey() {\n return this.key + '/' + this.tileCoord;\n }\n\n /**\n * Get the tile coordinate for this tile.\n * @return {import(\"./tilecoord.js\").TileCoord} The tile coordinate.\n * @api\n */\n getTileCoord() {\n return this.tileCoord;\n }\n\n /**\n * @return {import(\"./TileState.js\").default} State.\n */\n getState() {\n return this.state;\n }\n\n /**\n * Sets the state of this tile. If you write your own {@link module:ol/Tile~LoadFunction tileLoadFunction} ,\n * it is important to set the state correctly to {@link module:ol/TileState~ERROR}\n * when the tile cannot be loaded. Otherwise the tile cannot be removed from\n * the tile queue and will block other requests.\n * @param {import(\"./TileState.js\").default} state State.\n * @api\n */\n setState(state) {\n if (this.state === TileState.EMPTY) {\n // no more state changes\n return;\n }\n if (this.state !== TileState.ERROR && this.state > state) {\n throw new Error('Tile load sequence violation');\n }\n this.state = state;\n this.changed();\n }\n\n /**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n * @abstract\n * @api\n */\n load() {\n abstract();\n }\n\n /**\n * Get the alpha value for rendering.\n * @param {string} id An id for the renderer.\n * @param {number} time The render frame time.\n * @return {number} A number between 0 and 1.\n */\n getAlpha(id, time) {\n if (!this.transition_) {\n return 1;\n }\n\n let start = this.transitionStarts_[id];\n if (!start) {\n start = time;\n this.transitionStarts_[id] = start;\n } else if (start === -1) {\n return 1;\n }\n\n const delta = time - start + 1000 / 60; // avoid rendering at 0\n if (delta >= this.transition_) {\n return 1;\n }\n return easeIn(delta / this.transition_);\n }\n\n /**\n * Determine if a tile is in an alpha transition. A tile is considered in\n * transition if tile.getAlpha() has not yet been called or has been called\n * and returned 1.\n * @param {string} id An id for the renderer.\n * @return {boolean} The tile is in transition.\n */\n inTransition(id) {\n if (!this.transition_) {\n return false;\n }\n return this.transitionStarts_[id] !== -1;\n }\n\n /**\n * Mark a transition as complete.\n * @param {string} id An id for the renderer.\n */\n endTransition(id) {\n if (this.transition_) {\n this.transitionStarts_[id] = -1;\n }\n }\n\n /**\n * @override\n */\n disposeInternal() {\n this.release();\n super.disposeInternal();\n }\n}\n\nexport default Tile;\n","import {WORKER_OFFSCREEN_CANVAS} from './has.js';\n\n/**\n * @module ol/dom\n */\n\n/**\n * @typedef {Object} ImageAttributes\n * @property {string|null} [crossOrigin] Cross origin.\n * @property {ReferrerPolicy} [referrerPolicy] Referrer policy.\n */\n\n//FIXME Move this function to the canvas module\n/**\n * Create an html canvas element and returns its 2d context.\n * @param {number} [width] Canvas width.\n * @param {number} [height] Canvas height.\n * @param {Array} [canvasPool] Canvas pool to take existing canvas from.\n * @param {CanvasRenderingContext2DSettings} [settings] CanvasRenderingContext2DSettings\n * @return {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} The context.\n */\nexport function createCanvasContext2D(width, height, canvasPool, settings) {\n /** @type {HTMLCanvasElement|OffscreenCanvas} */\n let canvas;\n if (canvasPool && canvasPool.length) {\n canvas = /** @type {HTMLCanvasElement} */ (canvasPool.shift());\n } else if (WORKER_OFFSCREEN_CANVAS) {\n canvas = new (class extends OffscreenCanvas {\n style = {};\n })(width ?? 300, height ?? 150);\n } else {\n canvas = document.createElement('canvas');\n }\n if (width) {\n canvas.width = width;\n }\n if (height) {\n canvas.height = height;\n }\n return /** @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} */ (\n canvas.getContext('2d', settings)\n );\n}\n\n/**\n * @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D}\n */\nlet sharedCanvasContext;\n\n/**\n * @return {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} Shared canvas context.\n */\nexport function getSharedCanvasContext2D() {\n if (!sharedCanvasContext) {\n sharedCanvasContext = createCanvasContext2D(1, 1);\n }\n return sharedCanvasContext;\n}\n\n/**\n * Releases canvas memory to avoid exceeding memory limits in Safari.\n * See https://pqina.nl/blog/total-canvas-memory-use-exceeds-the-maximum-limit/\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context Context.\n */\nexport function releaseCanvas(context) {\n const canvas = context.canvas;\n canvas.width = 1;\n canvas.height = 1;\n context.clearRect(0, 0, 1, 1);\n}\n\n/**\n * Get the current computed width for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerWidth(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The width.\n */\nexport function outerWidth(element) {\n let width = element.offsetWidth;\n const style = getComputedStyle(element);\n width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);\n\n return width;\n}\n\n/**\n * Get the current computed height for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerHeight(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The height.\n */\nexport function outerHeight(element) {\n let height = element.offsetHeight;\n const style = getComputedStyle(element);\n height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);\n\n return height;\n}\n\n/**\n * @param {Node} newNode Node to replace old node\n * @param {Node} oldNode The node to be replaced\n */\nexport function replaceNode(newNode, oldNode) {\n const parent = oldNode.parentNode;\n if (parent) {\n parent.replaceChild(newNode, oldNode);\n }\n}\n\n/**\n * @param {Node} node The node to remove the children from.\n */\nexport function removeChildren(node) {\n while (node.lastChild) {\n node.lastChild.remove();\n }\n}\n\n/**\n * Transform the children of a parent node so they match the\n * provided list of children. This function aims to efficiently\n * remove, add, and reorder child nodes while maintaining a simple\n * implementation (it is not guaranteed to minimize DOM operations).\n * @param {Node} node The parent node whose children need reworking.\n * @param {Array} children The desired children.\n */\nexport function replaceChildren(node, children) {\n const oldChildren = node.childNodes;\n\n for (let i = 0; true; ++i) {\n const oldChild = oldChildren[i];\n const newChild = children[i];\n\n // check if our work is done\n if (!oldChild && !newChild) {\n break;\n }\n\n // check if children match\n if (oldChild === newChild) {\n continue;\n }\n\n // check if a new child needs to be added\n if (!oldChild) {\n node.appendChild(newChild);\n continue;\n }\n\n // check if an old child needs to be removed\n if (!newChild) {\n node.removeChild(oldChild);\n --i;\n continue;\n }\n\n // reorder\n node.insertBefore(newChild, oldChild);\n }\n}\n\n/**\n * Creates a minimal structure that mocks a DIV to be used by the composite and\n * layer renderer in a worker environment\n * @return {HTMLDivElement} mocked DIV\n */\nexport function createMockDiv() {\n const mockedDiv = new Proxy(\n {\n /**\n * @type {Array}\n */\n childNodes: [],\n /**\n * @param {HTMLElement} node html node.\n * @return {HTMLElement} html node.\n */\n appendChild: function (node) {\n this.childNodes.push(node);\n return node;\n },\n /**\n * dummy function, as this structure is not supposed to have a parent.\n */\n remove: function () {},\n /**\n * @param {HTMLElement} node html node.\n * @return {HTMLElement} html node.\n */\n removeChild: function (node) {\n const index = this.childNodes.indexOf(node);\n if (index === -1) {\n throw new Error('Node to remove was not found');\n }\n this.childNodes.splice(index, 1);\n return node;\n },\n /**\n * @param {HTMLElement} newNode new html node.\n * @param {HTMLElement} referenceNode reference html node.\n * @return {HTMLElement} new html node.\n */\n insertBefore: function (newNode, referenceNode) {\n const index = this.childNodes.indexOf(referenceNode);\n if (index === -1) {\n throw new Error('Reference node not found');\n }\n this.childNodes.splice(index, 0, newNode);\n return newNode;\n },\n style: {},\n },\n {\n get(target, prop, receiver) {\n if (prop === 'firstElementChild') {\n return target.childNodes.length > 0 ? target.childNodes[0] : null;\n }\n return Reflect.get(target, prop, receiver);\n },\n },\n );\n return /** @type {HTMLDivElement} */ (/** @type {*} */ (mockedDiv));\n}\n\n/***\n * @param {*} obj The object to check.\n * @return {obj is (HTMLCanvasElement | OffscreenCanvas)} The object is a canvas.\n */\nexport function isCanvas(obj) {\n return (\n (typeof HTMLCanvasElement !== 'undefined' &&\n obj instanceof HTMLCanvasElement) ||\n (typeof OffscreenCanvas !== 'undefined' && obj instanceof OffscreenCanvas)\n );\n}\n","/**\n * @module ol/ImageTile\n */\nimport {listenImage} from './Image.js';\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {WORKER_OFFSCREEN_CANVAS} from './has.js';\n\nclass ImageTile extends Tile {\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./TileState.js\").default} state State.\n * @param {string} src Image source URI.\n * @param {import('./dom.js').ImageAttributes} imageAttributes Image attributes options.\n * @param {import(\"./Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n * @param {import(\"./Tile.js\").Options} [options] Tile options.\n */\n constructor(\n tileCoord,\n state,\n src,\n imageAttributes,\n tileLoadFunction,\n options,\n ) {\n super(tileCoord, state, options);\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ = imageAttributes?.crossOrigin;\n\n /**\n * @private\n * @type {ReferrerPolicy}\n */\n this.referrerPolicy_ = imageAttributes?.referrerPolicy;\n\n /**\n * Image URI\n *\n * @private\n * @type {string}\n */\n this.src_ = src;\n\n this.key = src;\n\n /**\n * @private\n * @type {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas}\n */\n this.image_;\n\n if (WORKER_OFFSCREEN_CANVAS) {\n this.image_ = new OffscreenCanvas(1, 1);\n } else {\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n if (this.referrerPolicy_ !== undefined) {\n this.image_.referrerPolicy = this.referrerPolicy_;\n }\n }\n\n /**\n * @private\n * @type {?function():void}\n */\n this.unlisten_ = null;\n\n /**\n * @private\n * @type {import(\"./Tile.js\").LoadFunction}\n */\n this.tileLoadFunction_ = tileLoadFunction;\n }\n\n /**\n * Get the HTML image element for this tile (may be a Canvas, OffscreenCanvas, Image, or Video).\n * @return {HTMLCanvasElement|OffscreenCanvas|HTMLImageElement|HTMLVideoElement} Image.\n * @api\n */\n getImage() {\n return this.image_;\n }\n\n /**\n * Sets an HTML image element for this tile (may be a Canvas or preloaded Image).\n * @param {HTMLCanvasElement|OffscreenCanvas|HTMLImageElement} element Element.\n */\n setImage(element) {\n this.image_ = element;\n this.state = TileState.LOADED;\n this.unlistenImage_();\n this.changed();\n }\n\n /**\n * Get the cross origin of the ImageTile.\n * @return {string} Cross origin.\n */\n getCrossOrigin() {\n return this.crossOrigin_;\n }\n\n /**\n * Get the referrer policy of the ImageTile.\n * @return {ReferrerPolicy} Referrer policy.\n */\n getReferrerPolicy() {\n return this.referrerPolicy_;\n }\n\n /**\n * Tracks loading or read errors.\n *\n * @private\n */\n handleImageError_() {\n this.state = TileState.ERROR;\n this.unlistenImage_();\n this.image_ = getBlankImage();\n this.changed();\n }\n\n /**\n * Tracks successful image load.\n *\n * @private\n */\n handleImageLoad_() {\n if (WORKER_OFFSCREEN_CANVAS) {\n // OffscreenCanvas does not have naturalWidth and naturalHeight\n this.state = TileState.LOADED;\n } else {\n const image = /** @type {HTMLImageElement} */ (this.image_);\n if (image.naturalWidth && image.naturalHeight) {\n this.state = TileState.LOADED;\n } else {\n this.state = TileState.EMPTY;\n }\n }\n this.unlistenImage_();\n this.changed();\n }\n\n /**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n *\n * To retry loading tiles on failed requests, use a custom `tileLoadFunction`\n * that checks for error status codes and reloads only when the status code is\n * 408, 429, 500, 502, 503 and 504, and only when not too many retries have been\n * made already:\n *\n * ```js\n * const retryCodes = [408, 429, 500, 502, 503, 504];\n * const retries = {};\n * source.setTileLoadFunction((tile, src) => {\n * const image = tile.getImage();\n * fetch(src)\n * .then((response) => {\n * if (retryCodes.includes(response.status)) {\n * retries[src] = (retries[src] || 0) + 1;\n * if (retries[src] <= 3) {\n * setTimeout(() => tile.load(), retries[src] * 1000);\n * }\n * return Promise.reject();\n * }\n * return response.blob();\n * })\n * .then((blob) => {\n * const imageUrl = URL.createObjectURL(blob);\n * image.src = imageUrl;\n * setTimeout(() => URL.revokeObjectURL(imageUrl), 5000);\n * })\n * .catch(() => tile.setState(3)); // error\n * });\n * ```\n * @api\n * @override\n */\n load() {\n if (this.state == TileState.ERROR) {\n this.state = TileState.IDLE;\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n if (this.referrerPolicy_ !== undefined) {\n this.image_.referrerPolicy = this.referrerPolicy_;\n }\n }\n if (this.state == TileState.IDLE) {\n this.state = TileState.LOADING;\n this.changed();\n this.tileLoadFunction_(this, this.src_);\n this.unlisten_ = listenImage(\n this.image_,\n this.handleImageLoad_.bind(this),\n this.handleImageError_.bind(this),\n );\n }\n }\n\n /**\n * Discards event handlers which listen for load completion or errors.\n *\n * @private\n */\n unlistenImage_() {\n if (this.unlisten_) {\n this.unlisten_();\n this.unlisten_ = null;\n }\n }\n\n /**\n * @override\n */\n disposeInternal() {\n this.unlistenImage_();\n this.image_ = null;\n super.disposeInternal();\n }\n}\n\n/**\n * Get a 1-pixel blank image.\n * @return {HTMLCanvasElement|OffscreenCanvas} Blank image.\n */\nfunction getBlankImage() {\n const ctx = createCanvasContext2D(1, 1);\n ctx.fillStyle = 'rgba(0,0,0,0)';\n ctx.fillRect(0, 0, 1, 1);\n return ctx.canvas;\n}\n\nexport default ImageTile;\n","/**\n * @module ol/Kinetic\n */\n\n/**\n * @classdesc\n * Implementation of inertial deceleration for map movement.\n *\n * @api\n */\nclass Kinetic {\n /**\n * @param {number} decay Rate of decay (must be negative).\n * @param {number} minVelocity Minimum velocity (pixels/millisecond).\n * @param {number} delay Delay to consider to calculate the kinetic\n * initial values (milliseconds).\n */\n constructor(decay, minVelocity, delay) {\n /**\n * @private\n * @type {number}\n */\n this.decay_ = decay;\n\n /**\n * @private\n * @type {number}\n */\n this.minVelocity_ = minVelocity;\n\n /**\n * @private\n * @type {number}\n */\n this.delay_ = delay;\n\n /**\n * @private\n * @type {Array}\n */\n this.points_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.angle_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.initialVelocity_ = 0;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n begin() {\n this.points_.length = 0;\n this.angle_ = 0;\n this.initialVelocity_ = 0;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n */\n update(x, y) {\n this.points_.push(x, y, Date.now());\n }\n\n /**\n * @return {boolean} Whether we should do kinetic animation.\n */\n end() {\n if (this.points_.length < 6) {\n // at least 2 points are required (i.e. there must be at least 6 elements\n // in the array)\n return false;\n }\n const delay = Date.now() - this.delay_;\n const lastIndex = this.points_.length - 3;\n if (this.points_[lastIndex + 2] < delay) {\n // the last tracked point is too old, which means that the user stopped\n // panning before releasing the map\n return false;\n }\n\n // get the first point which still falls into the delay time\n let firstIndex = lastIndex - 3;\n while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) {\n firstIndex -= 3;\n }\n\n const duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2];\n // we don't want a duration of 0 (divide by zero)\n // we also make sure the user panned for a duration of at least one frame\n // (1/60s) to compute sane displacement values\n if (duration < 1000 / 60) {\n return false;\n }\n\n const dx = this.points_[lastIndex] - this.points_[firstIndex];\n const dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1];\n this.angle_ = Math.atan2(dy, dx);\n this.initialVelocity_ = Math.sqrt(dx * dx + dy * dy) / duration;\n return this.initialVelocity_ > this.minVelocity_;\n }\n\n /**\n * @return {number} Total distance travelled (pixels).\n */\n getDistance() {\n return (this.minVelocity_ - this.initialVelocity_) / this.decay_;\n }\n\n /**\n * @return {number} Angle of the kinetic panning animation (radians).\n */\n getAngle() {\n return this.angle_;\n }\n}\n\nexport default Kinetic;\n","/**\n * @module ol/geom/flat/interpolate\n */\nimport {binarySearch} from '../../array.js';\nimport {lerp} from '../../math.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} fraction Fraction.\n * @param {Array} [dest] Destination.\n * @param {number} [dimension] Destination dimension (default is `2`)\n * @return {Array} Destination.\n */\nexport function interpolatePoint(\n flatCoordinates,\n offset,\n end,\n stride,\n fraction,\n dest,\n dimension,\n) {\n let o, t;\n const n = (end - offset) / stride;\n if (n === 1) {\n o = offset;\n } else if (n === 2) {\n o = offset;\n t = fraction;\n } else if (n !== 0) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n let length = 0;\n const cumulativeLengths = [0];\n for (let i = offset + stride; i < end; i += stride) {\n const x2 = flatCoordinates[i];\n const y2 = flatCoordinates[i + 1];\n length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n cumulativeLengths.push(length);\n x1 = x2;\n y1 = y2;\n }\n const target = fraction * length;\n const index = binarySearch(cumulativeLengths, target);\n if (index < 0) {\n t =\n (target - cumulativeLengths[-index - 2]) /\n (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);\n o = offset + (-index - 2) * stride;\n } else {\n o = offset + index * stride;\n }\n }\n dimension = dimension > 1 ? dimension : 2;\n dest = dest ? dest : new Array(dimension);\n for (let i = 0; i < dimension; ++i) {\n dest[i] =\n o === undefined\n ? NaN\n : t === undefined\n ? flatCoordinates[o + i]\n : lerp(flatCoordinates[o + i], flatCoordinates[o + stride + i], t);\n }\n return dest;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @return {import(\"../../coordinate.js\").Coordinate|null} Coordinate.\n */\nexport function lineStringCoordinateAtM(\n flatCoordinates,\n offset,\n end,\n stride,\n m,\n extrapolate,\n) {\n if (end == offset) {\n return null;\n }\n let coordinate;\n if (m < flatCoordinates[offset + stride - 1]) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(offset, offset + stride);\n coordinate[stride - 1] = m;\n return coordinate;\n }\n return null;\n }\n if (flatCoordinates[end - 1] < m) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(end - stride, end);\n coordinate[stride - 1] = m;\n return coordinate;\n }\n return null;\n }\n // FIXME use O(1) search\n if (m == flatCoordinates[offset + stride - 1]) {\n return flatCoordinates.slice(offset, offset + stride);\n }\n let lo = offset / stride;\n let hi = end / stride;\n while (lo < hi) {\n const mid = (lo + hi) >> 1;\n if (m < flatCoordinates[(mid + 1) * stride - 1]) {\n hi = mid;\n } else {\n lo = mid + 1;\n }\n }\n const m0 = flatCoordinates[lo * stride - 1];\n if (m == m0) {\n return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);\n }\n const m1 = flatCoordinates[(lo + 1) * stride - 1];\n const t = (m - m0) / (m1 - m0);\n coordinate = [];\n for (let i = 0; i < stride - 1; ++i) {\n coordinate.push(\n lerp(\n flatCoordinates[(lo - 1) * stride + i],\n flatCoordinates[lo * stride + i],\n t,\n ),\n );\n }\n coordinate.push(m);\n return coordinate;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @param {boolean} interpolate Interpolate.\n * @return {import(\"../../coordinate.js\").Coordinate|null} Coordinate.\n */\nexport function lineStringsCoordinateAtM(\n flatCoordinates,\n offset,\n ends,\n stride,\n m,\n extrapolate,\n interpolate,\n) {\n if (interpolate) {\n return lineStringCoordinateAtM(\n flatCoordinates,\n offset,\n ends[ends.length - 1],\n stride,\n m,\n extrapolate,\n );\n }\n let coordinate;\n if (m < flatCoordinates[stride - 1]) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(0, stride);\n coordinate[stride - 1] = m;\n return coordinate;\n }\n return null;\n }\n if (flatCoordinates[flatCoordinates.length - 1] < m) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(flatCoordinates.length - stride);\n coordinate[stride - 1] = m;\n return coordinate;\n }\n return null;\n }\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n if (offset == end) {\n continue;\n }\n if (m < flatCoordinates[offset + stride - 1]) {\n return null;\n }\n if (m <= flatCoordinates[end - 1]) {\n return lineStringCoordinateAtM(\n flatCoordinates,\n offset,\n end,\n stride,\n m,\n false,\n );\n }\n offset = end;\n }\n return null;\n}\n","/**\n * @module ol/geom/flat/length\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Length.\n */\nexport function lineStringLength(flatCoordinates, offset, end, stride) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n let length = 0;\n for (let i = offset + stride; i < end; i += stride) {\n const x2 = flatCoordinates[i];\n const y2 = flatCoordinates[i + 1];\n length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n x1 = x2;\n y1 = y2;\n }\n return length;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Perimeter.\n */\nexport function linearRingLength(flatCoordinates, offset, end, stride) {\n let perimeter = lineStringLength(flatCoordinates, offset, end, stride);\n const dx = flatCoordinates[end - stride] - flatCoordinates[offset];\n const dy = flatCoordinates[end - stride + 1] - flatCoordinates[offset + 1];\n perimeter += Math.sqrt(dx * dx + dy * dy);\n return perimeter;\n}\n","/**\n * @module ol/geom/LineString\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {interpolatePoint, lineStringCoordinateAtM} from './flat/interpolate.js';\nimport {intersectsLineString} from './flat/intersectsextent.js';\nimport {lineStringLength} from './flat/length.js';\nimport {forEach as forEachSegment} from './flat/segments.js';\nimport {douglasPeucker} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Linestring geometry.\n *\n * @api\n */\nclass LineString extends SimpleGeometry {\n /**\n * @param {Array|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n\n /**\n * @private\n * @type {import(\"../coordinate.js\").Coordinate|null}\n */\n this.flatMidpoint_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.flatMidpointRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n if (layout !== undefined && !Array.isArray(coordinates[0])) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n } else {\n this.setCoordinates(\n /** @type {Array} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Append the passed coordinate to the coordinates of the linestring.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @api\n */\n appendCoordinate(coordinate) {\n extend(this.flatCoordinates, coordinate);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!LineString} Clone.\n * @api\n * @override\n */\n clone() {\n const lineString = new LineString(\n this.flatCoordinates.slice(),\n this.layout,\n );\n lineString.applyProperties(this);\n return lineString;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n maxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestPoint(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n this.maxDelta_,\n false,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * Iterate over each segment, calling the provided callback.\n * If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n *\n * @param {function(this: S, import(\"../coordinate.js\").Coordinate, import(\"../coordinate.js\").Coordinate): T} callback Function\n * called for each segment. The function will receive two arguments, the start and end coordinates of the segment.\n * @return {T|boolean} Value.\n * @template T,S\n * @api\n */\n forEachSegment(callback) {\n return forEachSegment(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n callback,\n );\n }\n\n /**\n * Returns the coordinate at `m` using linear interpolation, or `null` if no\n * such coordinate exists.\n *\n * `extrapolate` controls extrapolation beyond the range of Ms in the\n * MultiLineString. If `extrapolate` is `true` then Ms less than the first\n * M will return the first coordinate and Ms greater than the last M will\n * return the last coordinate.\n *\n * @param {number} m M.\n * @param {boolean} [extrapolate] Extrapolate. Default is `false`.\n * @return {import(\"../coordinate.js\").Coordinate|null} Coordinate.\n * @api\n */\n getCoordinateAtM(m, extrapolate) {\n if (this.layout != 'XYM' && this.layout != 'XYZM') {\n return null;\n }\n extrapolate = extrapolate !== undefined ? extrapolate : false;\n return lineStringCoordinateAtM(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n m,\n extrapolate,\n );\n }\n\n /**\n * Return the coordinates of the linestring.\n * @return {Array} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return inflateCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * Return the coordinate at the provided fraction along the linestring.\n * The `fraction` is a number between 0 and 1, where 0 is the start of the\n * linestring and 1 is the end.\n * @param {number} fraction Fraction.\n * @param {import(\"../coordinate.js\").Coordinate} [dest] Optional coordinate whose values will\n * be modified. If not provided, a new coordinate will be returned.\n * @return {import(\"../coordinate.js\").Coordinate} Coordinate of the interpolated point.\n * @api\n */\n getCoordinateAt(fraction, dest) {\n return interpolatePoint(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n fraction,\n dest,\n this.stride,\n );\n }\n\n /**\n * Return the length of the linestring on projected plane.\n * @return {number} Length (on projected plane).\n * @api\n */\n getLength() {\n return lineStringLength(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * @return {Array} Flat midpoint.\n */\n getFlatMidpoint() {\n if (this.flatMidpointRevision_ != this.getRevision()) {\n this.flatMidpoint_ = this.getCoordinateAt(\n 0.5,\n this.flatMidpoint_ ?? undefined,\n );\n this.flatMidpointRevision_ = this.getRevision();\n }\n return /** @type {Array} */ (this.flatMidpoint_);\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {LineString} Simplified LineString.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n simplifiedFlatCoordinates.length = douglasPeucker(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n return new LineString(simplifiedFlatCoordinates, 'XY');\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'LineString';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLineString(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n extent,\n this.getExtent(),\n );\n }\n\n /**\n * Set the coordinates of the linestring.\n * @param {!Array} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n );\n this.changed();\n }\n}\n\nexport default LineString;\n","/**\n * @module ol/color\n */\nimport {createCanvasContext2D} from './dom.js';\nimport {clamp, toFixed} from './math.js';\n\n/**\n * A color represented as a short array [red, green, blue, alpha].\n * red, green, and blue should be integers in the range 0..255 inclusive.\n * alpha should be a float in the range 0..1 inclusive. If no alpha value is\n * given then `1` will be used.\n * @typedef {Array} Color\n * @api\n */\n\n/**\n * Color to indicate that no color should be rendered. This is meant to be used for per-reference\n * comparisons only.\n * @type {Color}\n */\nexport const NO_COLOR = [NaN, NaN, NaN, 0];\n\nlet colorParseContext;\n/**\n * @return {CanvasRenderingContext2D} The color parse context\n */\nfunction getColorParseContext() {\n if (!colorParseContext) {\n colorParseContext = createCanvasContext2D(1, 1, undefined, {\n willReadFrequently: true,\n desynchronized: true,\n });\n }\n return colorParseContext;\n}\n\nconst rgbModernRegEx =\n /^rgba?\\(\\s*(\\d+%?)\\s+(\\d+%?)\\s+(\\d+%?)(?:\\s*\\/\\s*(\\d+%|\\d*\\.\\d+|[01]))?\\s*\\)$/i;\nconst rgbLegacyAbsoluteRegEx =\n /^rgba?\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)(?:\\s*,\\s*(\\d+%|\\d*\\.\\d+|[01]))?\\s*\\)$/i;\nconst rgbLegacyPercentageRegEx =\n /^rgba?\\(\\s*(\\d+%)\\s*,\\s*(\\d+%)\\s*,\\s*(\\d+%)(?:\\s*,\\s*(\\d+%|\\d*\\.\\d+|[01]))?\\s*\\)$/i;\nconst hexRegEx = /^#([\\da-f]{3,4}|[\\da-f]{6}|[\\da-f]{8})$/i;\n\n/**\n * @param {string} s Color component as number or percentage.\n * @param {number} divider Divider for percentage.\n * @return {number} Color component.\n */\nfunction toColorComponent(s, divider) {\n return s.endsWith('%')\n ? Number(s.substring(0, s.length - 1)) / divider\n : Number(s);\n}\n\n/**\n * @param {string} color Color string.\n */\nfunction throwInvalidColor(color) {\n throw new Error('failed to parse \"' + color + '\" as color');\n}\n\n/**\n * @param {string} color Color string.\n * @return {Color} RGBa color array.\n */\nfunction parseRgba(color) {\n // Fast lane for rgb(a) colors\n if (color.toLowerCase().startsWith('rgb')) {\n const rgb =\n color.match(rgbLegacyAbsoluteRegEx) ||\n color.match(rgbModernRegEx) ||\n color.match(rgbLegacyPercentageRegEx);\n if (rgb) {\n const alpha = rgb[4];\n const rgbDivider = 100 / 255;\n return [\n clamp((toColorComponent(rgb[1], rgbDivider) + 0.5) | 0, 0, 255),\n clamp((toColorComponent(rgb[2], rgbDivider) + 0.5) | 0, 0, 255),\n clamp((toColorComponent(rgb[3], rgbDivider) + 0.5) | 0, 0, 255),\n alpha !== undefined ? clamp(toColorComponent(alpha, 100), 0, 1) : 1,\n ];\n }\n throwInvalidColor(color);\n }\n // Fast lane for hex colors (also with alpha)\n if (color.startsWith('#')) {\n if (hexRegEx.test(color)) {\n const hex = color.substring(1);\n const step = hex.length <= 4 ? 1 : 2;\n const colorFromHex = [0, 0, 0, 255];\n for (let i = 0, ii = hex.length; i < ii; i += step) {\n let colorComponent = parseInt(hex.substring(i, i + step), 16);\n if (step === 1) {\n colorComponent += colorComponent << 4;\n }\n colorFromHex[i / step] = colorComponent;\n }\n colorFromHex[3] = colorFromHex[3] / 255;\n return colorFromHex;\n }\n throwInvalidColor(color);\n }\n // Use canvas color serialization to parse the color into hex or rgba\n // See https://www.w3.org/TR/2021/SPSD-2dcontext-20210128/#serialization-of-a-color\n const context = getColorParseContext();\n context.fillStyle = '#abcdef';\n let invalidCheckFillStyle = context.fillStyle;\n context.fillStyle = color;\n if (context.fillStyle === invalidCheckFillStyle) {\n context.fillStyle = '#fedcba';\n invalidCheckFillStyle = context.fillStyle;\n context.fillStyle = color;\n if (context.fillStyle === invalidCheckFillStyle) {\n throwInvalidColor(color);\n }\n }\n const colorString = context.fillStyle;\n if (colorString.startsWith('#') || colorString.startsWith('rgba')) {\n return parseRgba(colorString);\n }\n context.clearRect(0, 0, 1, 1);\n context.fillRect(0, 0, 1, 1);\n const colorFromImage = Array.from(context.getImageData(0, 0, 1, 1).data);\n colorFromImage[3] = toFixed(colorFromImage[3] / 255, 3);\n return colorFromImage;\n}\n\n/**\n * Return the color as an rgba string.\n * @param {Color|string} color Color.\n * @return {string} Rgba string.\n * @api\n */\nexport function asString(color) {\n if (typeof color === 'string') {\n return color;\n }\n return toString(color);\n}\n\n/**\n * @type {number}\n */\nconst MAX_CACHE_SIZE = 1024;\n\n/**\n * We maintain a small cache of parsed strings. Whenever the cache grows too large,\n * we delete an arbitrary set of the entries.\n *\n * @type {Object}\n */\nconst cache = {};\n\n/**\n * @type {number}\n */\nlet cacheSize = 0;\n\n/**\n * @param {Color} color A color that may or may not have an alpha channel.\n * @return {Color} The input color with an alpha channel. If the input color has\n * an alpha channel, the input color will be returned unchanged. Otherwise, a new\n * array will be returned with the input color and an alpha channel of 1.\n */\nexport function withAlpha(color) {\n if (color.length === 4) {\n return color;\n }\n const output = color.slice();\n output[3] = 1;\n return output;\n}\n\n// The functions b1, b2, a1, a2, rgbaToLcha and lchaToRgba below are adapted from\n// https://stackoverflow.com/a/67219995/2389327\n\n/**\n * @param {number} v Input value.\n * @return {number} Output value.\n */\nfunction b1(v) {\n return v > 0.0031308 ? Math.pow(v, 1 / 2.4) * 269.025 - 14.025 : v * 3294.6;\n}\n\n/**\n * @param {number} v Input value.\n * @return {number} Output value.\n */\nfunction b2(v) {\n return v > 0.2068965 ? Math.pow(v, 3) : (v - 4 / 29) * (108 / 841);\n}\n\n/**\n * @param {number} v Input value.\n * @return {number} Output value.\n */\nfunction a1(v) {\n return v > 10.314724 ? Math.pow((v + 14.025) / 269.025, 2.4) : v / 3294.6;\n}\n\n/**\n * @param {number} v Input value.\n * @return {number} Output value.\n */\nfunction a2(v) {\n return v > 0.0088564 ? Math.pow(v, 1 / 3) : v / (108 / 841) + 4 / 29;\n}\n\n/**\n * @param {Color} color RGBA color.\n * @return {Color} LCHuv color with alpha.\n */\nexport function rgbaToLcha(color) {\n const r = a1(color[0]);\n const g = a1(color[1]);\n const b = a1(color[2]);\n const y = a2(r * 0.222488403 + g * 0.716873169 + b * 0.06060791);\n const l = 500 * (a2(r * 0.452247074 + g * 0.399439023 + b * 0.148375274) - y);\n const q = 200 * (y - a2(r * 0.016863605 + g * 0.117638439 + b * 0.865350722));\n const h = Math.atan2(q, l) * (180 / Math.PI);\n return [\n 116 * y - 16,\n Math.sqrt(l * l + q * q),\n h < 0 ? h + 360 : h,\n color[3],\n ];\n}\n\n/**\n * @param {Color} color LCHuv color with alpha.\n * @return {Color} RGBA color.\n */\nexport function lchaToRgba(color) {\n const l = (color[0] + 16) / 116;\n const c = color[1];\n const h = (color[2] * Math.PI) / 180;\n const y = b2(l);\n const x = b2(l + (c / 500) * Math.cos(h));\n const z = b2(l - (c / 200) * Math.sin(h));\n const r = b1(x * 3.021973625 - y * 1.617392459 - z * 0.404875592);\n const g = b1(x * -0.943766287 + y * 1.916279586 + z * 0.027607165);\n const b = b1(x * 0.069407491 - y * 0.22898585 + z * 1.159737864);\n return [\n clamp((r + 0.5) | 0, 0, 255),\n clamp((g + 0.5) | 0, 0, 255),\n clamp((b + 0.5) | 0, 0, 255),\n color[3],\n ];\n}\n\n/**\n * @param {string} s String.\n * @return {Color} Color.\n */\nexport function fromString(s) {\n if (s === 'none') {\n return NO_COLOR;\n }\n if (cache.hasOwnProperty(s)) {\n return cache[s];\n }\n if (cacheSize >= MAX_CACHE_SIZE) {\n let i = 0;\n for (const key in cache) {\n if ((i++ & 3) === 0) {\n delete cache[key];\n --cacheSize;\n }\n }\n }\n\n const color = parseRgba(s);\n if (color.length !== 4) {\n throwInvalidColor(s);\n }\n for (const c of color) {\n if (isNaN(c)) {\n throwInvalidColor(s);\n }\n }\n cache[s] = color;\n ++cacheSize;\n return color;\n}\n\n/**\n * Return the color as an array. This function maintains a cache of calculated\n * arrays which means the result should not be modified.\n * @param {Color|string} color Color.\n * @return {Color} Color.\n * @api\n */\nexport function asArray(color) {\n if (Array.isArray(color)) {\n return color;\n }\n return fromString(color);\n}\n\n/**\n * @param {Color} color Color.\n * @return {string} String.\n */\nexport function toString(color) {\n let r = color[0];\n if (r != (r | 0)) {\n r = (r + 0.5) | 0;\n }\n let g = color[1];\n if (g != (g | 0)) {\n g = (g + 0.5) | 0;\n }\n let b = color[2];\n if (b != (b | 0)) {\n b = (b + 0.5) | 0;\n }\n const a = color[3] === undefined ? 1 : Math.round(color[3] * 1000) / 1000;\n return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';\n}\n\n/**\n * @param {string} s String.\n * @return {boolean} Whether the string is actually a valid color\n */\nexport function isStringColor(s) {\n try {\n fromString(s);\n return true;\n } catch {\n return false;\n }\n}\n","/**\n * @module ol/style/IconImageCache\n */\nimport ImageState from '../ImageState.js';\nimport {asArray} from '../color.js';\nimport {getSharedCanvasContext2D} from '../dom.js';\n\n/**\n * @classdesc\n * Singleton class. Available through {@link module:ol/style/IconImageCache.shared}.\n */\nclass IconImageCache {\n constructor() {\n /**\n * @type {!Object}\n * @private\n */\n this.cache_ = {};\n\n /**\n * @type {!Object}\n * @private\n */\n this.patternCache_ = {};\n\n /**\n * @type {number}\n * @private\n */\n this.cacheSize_ = 0;\n\n /**\n * @type {number}\n * @private\n */\n this.maxCacheSize_ = 1024;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n clear() {\n this.cache_ = {};\n this.patternCache_ = {};\n this.cacheSize_ = 0;\n }\n\n /**\n * @return {boolean} Can expire cache.\n */\n canExpireCache() {\n return this.cacheSize_ > this.maxCacheSize_;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n expire() {\n if (this.canExpireCache()) {\n let i = 0;\n for (const key in this.cache_) {\n const iconImage = this.cache_[key];\n if ((i++ & 3) === 0 && !iconImage.hasListener()) {\n delete this.cache_[key];\n delete this.patternCache_[key];\n --this.cacheSize_;\n }\n }\n }\n }\n\n /**\n * @param {string} src Src.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @return {import(\"./IconImage.js\").default} Icon image.\n */\n get(src, color) {\n const key = getCacheKey(src, color);\n\n const icon = key in this.cache_ ? this.cache_[key] : null;\n return icon;\n }\n\n /**\n * @param {string} src Src.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @return {CanvasPattern} Icon image.\n */\n getPattern(src, color) {\n const key = getCacheKey(src, color);\n return key in this.patternCache_ ? this.patternCache_[key] : null;\n }\n\n /**\n * @param {string} src Src.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @param {import(\"./IconImage.js\").default|null} iconImage Icon image.\n * @param {boolean} [pattern] Also cache a `'repeat'` pattern with this `iconImage`.\n */\n set(src, color, iconImage, pattern) {\n const key = getCacheKey(src, color);\n const update = key in this.cache_;\n this.cache_[key] = iconImage;\n if (pattern) {\n if (iconImage.getImageState() === ImageState.IDLE) {\n iconImage.load();\n }\n if (iconImage.getImageState() === ImageState.LOADING) {\n iconImage.ready().then(() => {\n this.patternCache_[key] = getSharedCanvasContext2D().createPattern(\n iconImage.getImage(1),\n 'repeat',\n );\n });\n } else {\n this.patternCache_[key] = getSharedCanvasContext2D().createPattern(\n iconImage.getImage(1),\n 'repeat',\n );\n }\n }\n if (!update) {\n ++this.cacheSize_;\n }\n }\n\n /**\n * Set the cache size of the icon cache. Default is `1024`. Change this value when\n * your map uses more than 1024 different icon images and you are not caching icon\n * styles on the application level.\n * @param {number} maxCacheSize Cache max size.\n * @api\n */\n setSize(maxCacheSize) {\n this.maxCacheSize_ = maxCacheSize;\n this.expire();\n }\n}\n\n/**\n * @param {string} src Src.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @return {string} Cache key.\n */\nexport function getCacheKey(src, color) {\n const colorString = color ? asArray(color) : 'null';\n return src + ':' + colorString;\n}\n\nexport default IconImageCache;\n\n/**\n * The {@link module:ol/style/IconImageCache~IconImageCache} for\n * {@link module:ol/style/Icon~Icon} images.\n * @api\n */\nexport const shared = new IconImageCache();\n","/**\n * @module ol/style/IconImage\n */\n\nimport {decodeFallback} from '../Image.js';\nimport ImageState from '../ImageState.js';\nimport {asString} from '../color.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport EventType from '../events/EventType.js';\nimport EventTarget from '../events/Target.js';\nimport {shared as iconImageCache} from './IconImageCache.js';\n\n/**\n * @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D}\n */\nlet taintedTestContext = null;\n\nclass IconImage extends EventTarget {\n /**\n * @param {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap|null} image Image.\n * @param {string|undefined} src Src.\n * @param {import('../dom.js').ImageAttributes} imageAttributes Image attributes options.\n * @param {import(\"../ImageState.js\").default|undefined} imageState Image state.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n */\n constructor(image, src, imageAttributes, imageState, color) {\n super();\n\n /**\n * @private\n * @type {HTMLImageElement|OffscreenCanvas|HTMLCanvasElement|ImageBitmap}\n */\n this.hitDetectionImage_ = null;\n\n /**\n * @private\n * @type {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap|null}\n */\n this.image_ = image;\n\n /**\n * @private\n * @type {string|null}\n */\n this.crossOrigin_ = imageAttributes?.crossOrigin;\n\n /**\n * @private\n * @type {ReferrerPolicy}\n */\n this.referrerPolicy_ = imageAttributes?.referrerPolicy;\n\n /**\n * @private\n * @type {Object}\n */\n this.canvas_ = {};\n\n /**\n * @private\n * @type {import(\"../color.js\").Color|string|null}\n */\n this.color_ = color;\n\n /**\n * @private\n * @type {import(\"../ImageState.js\").default}\n */\n this.imageState_ = imageState === undefined ? ImageState.IDLE : imageState;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size|null}\n */\n this.size_ =\n image && image.width && image.height ? [image.width, image.height] : null;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.src_ = src;\n\n /**\n * @private\n */\n this.tainted_;\n\n /**\n * @private\n * @type {Promise|null}\n */\n this.ready_ = null;\n }\n\n /**\n * @private\n */\n initializeImage_() {\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n if (this.referrerPolicy_ !== undefined) {\n this.image_.referrerPolicy = this.referrerPolicy_;\n }\n }\n\n /**\n * @private\n * @return {boolean} The image canvas is tainted.\n */\n isTainted_() {\n if (this.tainted_ === undefined && this.imageState_ === ImageState.LOADED) {\n if (!taintedTestContext) {\n taintedTestContext = createCanvasContext2D(1, 1, undefined, {\n willReadFrequently: true,\n });\n }\n taintedTestContext.drawImage(this.image_, 0, 0);\n try {\n taintedTestContext.getImageData(0, 0, 1, 1);\n this.tainted_ = false;\n } catch {\n taintedTestContext = null;\n this.tainted_ = true;\n }\n }\n return this.tainted_ === true;\n }\n\n /**\n * @private\n */\n dispatchChangeEvent_() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * @private\n */\n handleImageError_() {\n this.imageState_ = ImageState.ERROR;\n this.dispatchChangeEvent_();\n }\n\n /**\n * @private\n */\n handleImageLoad_() {\n this.imageState_ = ImageState.LOADED;\n this.size_ = [this.image_.width, this.image_.height];\n this.dispatchChangeEvent_();\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap} Image or Canvas element or image bitmap.\n */\n getImage(pixelRatio) {\n if (!this.image_) {\n this.initializeImage_();\n }\n this.replaceColor_(pixelRatio);\n return this.canvas_[pixelRatio] ? this.canvas_[pixelRatio] : this.image_;\n }\n\n /**\n * @param {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap} image Image.\n */\n setImage(image) {\n this.image_ = image;\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Image or Canvas element.\n */\n getPixelRatio(pixelRatio) {\n this.replaceColor_(pixelRatio);\n return this.canvas_[pixelRatio] ? pixelRatio : 1;\n }\n\n /**\n * @return {import(\"../ImageState.js\").default} Image state.\n */\n getImageState() {\n return this.imageState_;\n }\n\n /**\n * @return {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap} Image element.\n */\n getHitDetectionImage() {\n if (!this.image_) {\n this.initializeImage_();\n }\n if (!this.hitDetectionImage_) {\n if (this.isTainted_()) {\n const width = this.size_[0];\n const height = this.size_[1];\n const context = createCanvasContext2D(width, height);\n context.fillRect(0, 0, width, height);\n this.hitDetectionImage_ = context.canvas;\n } else {\n this.hitDetectionImage_ = this.image_;\n }\n }\n return this.hitDetectionImage_;\n }\n\n /**\n * Get the size of the icon (in pixels).\n * @return {import(\"../size.js\").Size} Image size.\n */\n getSize() {\n return this.size_;\n }\n\n /**\n * @return {string|undefined} Image src.\n */\n getSrc() {\n return this.src_;\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.imageState_ !== ImageState.IDLE) {\n return;\n }\n if (!this.image_) {\n this.initializeImage_();\n }\n\n this.imageState_ = ImageState.LOADING;\n try {\n if (this.src_ !== undefined) {\n /** @type {HTMLImageElement} */ (this.image_).src = this.src_;\n }\n } catch {\n this.handleImageError_();\n }\n if (this.image_ instanceof HTMLImageElement) {\n decodeFallback(this.image_, this.src_)\n .then((image) => {\n this.image_ = image;\n this.handleImageLoad_();\n })\n .catch(this.handleImageError_.bind(this));\n }\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @private\n */\n replaceColor_(pixelRatio) {\n if (\n !this.color_ ||\n this.canvas_[pixelRatio] ||\n this.imageState_ !== ImageState.LOADED\n ) {\n return;\n }\n\n const image = this.image_;\n const ctx = createCanvasContext2D(\n Math.ceil(image.width * pixelRatio),\n Math.ceil(image.height * pixelRatio),\n );\n const canvas = ctx.canvas;\n\n ctx.scale(pixelRatio, pixelRatio);\n ctx.drawImage(image, 0, 0);\n\n ctx.globalCompositeOperation = 'multiply';\n ctx.fillStyle = asString(this.color_);\n ctx.fillRect(0, 0, canvas.width / pixelRatio, canvas.height / pixelRatio);\n\n ctx.globalCompositeOperation = 'destination-in';\n ctx.drawImage(image, 0, 0);\n\n this.canvas_[pixelRatio] = canvas;\n }\n\n /**\n * @return {Promise} Promise that resolves when the image is loaded.\n */\n ready() {\n if (!this.ready_) {\n this.ready_ = new Promise((resolve) => {\n if (\n this.imageState_ === ImageState.LOADED ||\n this.imageState_ === ImageState.ERROR\n ) {\n resolve();\n } else {\n const onChange = () => {\n if (\n this.imageState_ === ImageState.LOADED ||\n this.imageState_ === ImageState.ERROR\n ) {\n this.removeEventListener(EventType.CHANGE, onChange);\n resolve();\n }\n };\n this.addEventListener(EventType.CHANGE, onChange);\n }\n });\n }\n return this.ready_;\n }\n}\n\n/**\n * @param {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap|null} image Image.\n * @param {string|undefined} src Src.\n * @param {import('../dom.js').ImageAttributes} imageAttributes Image attributes options.\n * @param {import(\"../ImageState.js\").default|undefined} imageState Image state.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @param {boolean} [pattern] Also cache a `repeat` pattern with the icon image.\n * @return {IconImage} Icon image.\n */\nexport function get(image, src, imageAttributes, imageState, color, pattern) {\n let iconImage =\n src === undefined ? undefined : iconImageCache.get(src, color);\n if (!iconImage) {\n iconImage = new IconImage(\n image,\n image && 'src' in image ? image.src || undefined : src,\n imageAttributes,\n imageState,\n color,\n );\n iconImageCache.set(src, color, iconImage, pattern);\n }\n if (pattern && iconImage && !iconImageCache.getPattern(src, color)) {\n iconImageCache.set(src, color, iconImage, pattern);\n }\n return iconImage;\n}\n\nexport default IconImage;\n","/**\n * @module ol/colorlike\n */\nimport ImageState from './ImageState.js';\nimport {toString} from './color.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {get as getIconImage} from './style/IconImage.js';\nimport {shared as iconCache} from './style/IconImageCache.js';\n\n/**\n * @typedef {Object} PatternDescriptor\n * @property {string} src Pattern image URL\n * @property {import(\"./color.js\").Color|string} [color] Color to tint the pattern with.\n * @property {import(\"./size.js\").Size} [size] Size of the desired slice from the pattern image.\n * Use this together with `offset` when the pattern image is a sprite sheet.\n * @property {import(\"./size.js\").Size} [offset] Offset of the desired slice from the pattern image.\n * Use this together with `size` when the pattern image is a sprite sheet.\n */\n\n/**\n * A type accepted by CanvasRenderingContext2D.fillStyle\n * or CanvasRenderingContext2D.strokeStyle.\n * Represents a color, [CanvasPattern](https://developer.mozilla.org/en-US/docs/Web/API/CanvasPattern),\n * or [CanvasGradient](https://developer.mozilla.org/en-US/docs/Web/API/CanvasGradient). The origin for\n * patterns and gradients as fill style is an increment of 512 css pixels from map coordinate\n * `[0, 0]`. For seamless repeat patterns, width and height of the pattern image\n * must be a factor of two (2, 4, 8, ..., 512).\n *\n * @typedef {string|CanvasPattern|CanvasGradient} ColorLike\n * @api\n */\n\n/**\n * @param {import(\"./color.js\").Color|ColorLike|PatternDescriptor|null} color Color.\n * @return {ColorLike|null} The color as an {@link ol/colorlike~ColorLike}.\n * @api\n */\nexport function asColorLike(color) {\n if (!color) {\n return null;\n }\n if (Array.isArray(color)) {\n return toString(color);\n }\n if (typeof color === 'object' && 'src' in color) {\n return asCanvasPattern(color);\n }\n return color;\n}\n\n/**\n * @param {PatternDescriptor} pattern Pattern descriptor.\n * @return {CanvasPattern|null} Canvas pattern or null if the pattern referenced in the\n * PatternDescriptor was not found in the icon image cache.\n */\nfunction asCanvasPattern(pattern) {\n if (!pattern.offset || !pattern.size) {\n return iconCache.getPattern(pattern.src, pattern.color);\n }\n\n const cacheKey = pattern.src + ':' + pattern.offset;\n\n const canvasPattern = iconCache.getPattern(cacheKey, pattern.color);\n if (canvasPattern) {\n return canvasPattern;\n }\n\n const iconImage = iconCache.get(pattern.src, null);\n if (iconImage.getImageState() !== ImageState.LOADED) {\n return null;\n }\n const patternCanvasContext = createCanvasContext2D(\n pattern.size[0],\n pattern.size[1],\n );\n patternCanvasContext.drawImage(\n iconImage.getImage(1),\n pattern.offset[0],\n pattern.offset[1],\n pattern.size[0],\n pattern.size[1],\n 0,\n 0,\n pattern.size[0],\n pattern.size[1],\n );\n getIconImage(\n patternCanvasContext.canvas,\n cacheKey,\n undefined,\n ImageState.LOADED,\n pattern.color,\n true,\n );\n return iconCache.getPattern(cacheKey, pattern.color);\n}\n","import {angleBetween} from '../../coordinate.js';\n\n/**\n * Offsets a line string to the left / right along its segments direction.\n * Offset is applied to each segment of the line in the direciton of the segment normal (positive offset goes \"right\" relative to the line direction).\n * For very sharp angles between segments, the function falls back to offsetting along the segment normal direction to avoid excessively long miters.\n *\n * Coordinates and the offset should be in the same units — either pixels or the same spatial reference system as the input line coordinates.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} start Start index.\n * @param {number} end End index.\n * @param {number} stride Stride.\n * @param {number} offset Offset distance along the segment normal direction.\n * Positive values offset to the right relative to the direction of the line.\n * Negative values offset to the left.\n * @param {boolean} isClosedRing If coordinates build a closed circle (in this the first and the last coordinate offsets will consider previous / next ring coordinate)\n * @param {Array} [dest] Destination coordinate array. If not provided a new one will be created\n * @param {number} [destinationStride] Stride of destination coordinates. If unspecified, assumed to be same as the source coordinates stride.\n * @return {Array} Result flat coordinates of the offset line.\n */\nexport function offsetLineString(\n flatCoordinates,\n start,\n end,\n stride,\n offset,\n isClosedRing,\n dest,\n destinationStride,\n) {\n dest = dest ?? [];\n destinationStride = destinationStride ?? stride;\n\n const secondPointX = flatCoordinates[start + stride];\n const secondPointY = flatCoordinates[start + stride + 1];\n const secondToLastPointX = flatCoordinates[end - 2 * stride];\n const secondToLastPointY = flatCoordinates[end - 2 * stride + 1];\n let x, y, prevX, prevY, nextX, nextY, offsetX, offsetY;\n\n let i = 0;\n for (let j = start; j < end; j += stride) {\n // 1. Detect previous and next coordinates of a current vertex\n prevX = x;\n prevY = y;\n nextX = undefined;\n nextY = undefined;\n if (j + stride < end) {\n nextX = flatCoordinates[j + stride];\n nextY = flatCoordinates[j + stride + 1];\n }\n // First coordinate of a closed ring -> previous coordinate is the second to last one\n if (isClosedRing && j === start) {\n prevX = secondToLastPointX;\n prevY = secondToLastPointY;\n }\n // Last coordinate of a closed ring -> next coordinate is the second vertex of a line string (the last one is same as the first one for a closed ring)\n if (isClosedRing && j === end - stride) {\n nextX = secondPointX;\n nextY = secondPointY;\n }\n\n // 2. Current vertex to offset\n x = flatCoordinates[j];\n y = flatCoordinates[j + 1];\n\n // 3. Offset the vertex\n [offsetX, offsetY] = offsetLineVertex(\n x,\n y,\n prevX,\n prevY,\n nextX,\n nextY,\n offset,\n );\n dest[i++] = offsetX;\n dest[i++] = offsetY;\n\n // 4. Copy over other dimension values if any\n for (let k = 2; k < destinationStride; k++) {\n dest[i++] = flatCoordinates[j + k];\n }\n }\n\n if (dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * Computes the offset of a single vertex of a line string.\n *\n * The function calculates a new vertex coordinate offset along the normal/miter direction of the line at this vertex.\n * Offset is applied along the segment normal (positive offset goes \"right\" relative to the line direction).\n * It handles first and last vertices (caps) as well as joins between two segments (mitering).\n * For very sharp angles, the function falls back to offsetting along the segment normal direction to avoid excessively long miters.\n *\n * Coordinates and the offset should be in the same units — either pixels or the same spatial reference system as the input line coordinates.\n *\n * @param {number} x Vertex x-coordinate.\n * @param {number} y Vertex y-coordinate.\n * @param {number|undefined} prevX Previous vertex x-coordinate.\n * Pass undefined if computing the offset for the first vertex (no previous vertex).\n * @param {number|undefined} prevY Previous vertex y-coordinate.\n * Pass undefined if computing the offset for the first vertex (no previous vertex).\n * @param {number|undefined} nextX Next vertex x-coordinate.\n * Pass undefined if computing the offset for the last vertex (no next vertex).\n * @param {number|undefined} nextY Next vertex y-coordinate.\n * Pass undefined if computing the offset for the last vertex (no next vertex).\n * @param {number} offset Offset distance along the segment normal direction.\n * Positive values offset to the right relative to the direction from previous to next vertex.\n * Negative values offset to the left.\n * @return {import(\"../../coordinate.js\").Coordinate} Offset vertex coordinate as `[x, y]`.\n */\nfunction offsetLineVertex(x, y, prevX, prevY, nextX, nextY, offset) {\n // Compute segment direction\n let nx, ny;\n if (prevX !== undefined && prevY !== undefined) {\n nx = x - prevX;\n ny = y - prevY;\n } else if (nextX !== undefined && nextY !== undefined) {\n nx = nextX - x;\n ny = nextY - y;\n } else {\n // no next, no previous point given -> just assume some default (horizontal) direction\n nx = 1;\n ny = 0;\n }\n\n // Normalize -> tangent\n const len = Math.hypot(nx, ny);\n const tx = nx / len;\n const ty = ny / len;\n\n // Rotate tangent 90° -> normal\n nx = -ty;\n ny = tx;\n\n // First / last vertex -> offset the point in the direction of the normal vector\n if (prevX === undefined || prevY === undefined) {\n return [x + nx * offset, y + ny * offset];\n }\n if (nextX === undefined || nextY === undefined) {\n return [x + nx * offset, y + ny * offset];\n }\n\n // Compute join angle - angle between 2 segments of the vertex.\n const joinAngle = angleBetween([x, y], [prevX, prevY], [nextX, nextY]);\n\n // Avoid huge or infinite miter joins for very sharp angles, offset in the segment direction in this case.\n if (Math.cos(joinAngle) > 0.998) {\n return [x + tx * offset, y + ty * offset];\n }\n\n // Compute join offset direction.\n // We rotate the normal vector by half of the join angle.\n // This gives the direction of the miter at the vertex.\n const cos = Math.cos(joinAngle / 2);\n const sin = Math.sin(joinAngle / 2);\n\n // Rotate the normal vector (nx, ny) by half of the join angle.\n // bx/by = bisector direction before normalization\n const bx = sin * nx + cos * ny;\n const by = -cos * nx + sin * ny;\n\n // Scale the bisector so that moving along it preserves the correct offset distance.\n // Dividing by sin(half of angle) converts the bisector into the true miter vector.\n // (This expands the miter for sharp angles and shortens it for wide ones.)\n const dx = bx * (1 / sin);\n const dy = by * (1 / sin);\n\n // Offset final vertex along miter direction\n return [x + dx * offset, y + dy * offset];\n}\n\n/**\n * Removes self-intersection loops (cycles) from an offset line.\n * When a polyline is offset, sharp turns can create self-intersecting loops.\n * This function detects those crossings and splices out the looped portions,\n * replacing them with the intersection point.\n *\n * @param {Array} coords Flat offset coordinates (modified in-place).\n * @param {number} stride Coordinate stride (typically 2).\n * @param {boolean} [closedLine] Whether the original line is closed (first vertex === last vertex).\n * When true, the first and last offset segments are not compared against each other to avoid\n * false loop detection at the closure point.\n * @return {Array} The cleaned coordinate array.\n */\nexport function removeOffsetCycles(coords, stride, closedLine = false) {\n for (let i = 0, ii = coords.length - 2; i < ii; i += stride) {\n const jMax =\n closedLine && i === 0\n ? coords.length - 3 * stride\n : coords.length - 2 * stride;\n for (let j = jMax; j > i + stride; j -= stride) {\n const p1x = coords[i];\n const p1y = coords[i + 1];\n const p2x = coords[i + stride];\n const p2y = coords[i + stride + 1];\n const p3x = coords[j];\n const p3y = coords[j + 1];\n const p4x = coords[j + stride];\n const p4y = coords[j + stride + 1];\n const d = (p4y - p3y) * (p2x - p1x) - (p4x - p3x) * (p2y - p1y);\n if (d === 0) {\n continue;\n }\n const t = ((p4x - p3x) * (p1y - p3y) - (p4y - p3y) * (p1x - p3x)) / d;\n const u = ((p2x - p1x) * (p1y - p3y) - (p2y - p1y) * (p1x - p3x)) / d;\n if (t > 0 && t < 1 && u > 0 && u < 1) {\n const ix = p1x + t * (p2x - p1x);\n const iy = p1y + t * (p2y - p1y);\n coords[i + stride] = ix;\n coords[i + stride + 1] = iy;\n coords.splice(i + 2 * stride, j - i - stride);\n break;\n }\n }\n }\n return coords;\n}\n","/**\n * @module ol/render/VectorContext\n */\n\n/**\n * @classdesc\n * Context for drawing geometries. A vector context is available on render\n * events and does not need to be constructed directly.\n * @api\n */\nclass VectorContext {\n /**\n * Render a geometry with a custom renderer.\n *\n * @param {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {Function} renderer Renderer.\n * @param {Function} hitDetectionRenderer Renderer.\n * @param {number} [index] Render order index.\n */\n drawCustom(geometry, feature, renderer, hitDetectionRenderer, index) {}\n\n /**\n * Render a geometry.\n *\n * @param {import(\"../geom/Geometry.js\").default} geometry The geometry to render.\n */\n drawGeometry(geometry) {}\n\n /**\n * Set the rendering style.\n *\n * @param {import(\"../style/Style.js\").default} style The rendering style.\n */\n setStyle(style) {}\n\n /**\n * @param {import(\"../geom/Circle.js\").default} circleGeometry Circle geometry.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawCircle(circleGeometry, feature, index) {}\n\n /**\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} [index] Render order index.\n */\n drawFeature(feature, style, index) {}\n\n /**\n * @param {import(\"../geom/GeometryCollection.js\").default} geometryCollectionGeometry Geometry collection.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawGeometryCollection(geometryCollectionGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/LineString.js\").default|import(\"./Feature.js\").default} lineStringGeometry Line string geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawLineString(lineStringGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"./Feature.js\").default} multiLineStringGeometry MultiLineString geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawMultiLineString(multiLineStringGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"./Feature.js\").default} multiPointGeometry MultiPoint geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawMultiPoint(multiPointGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/MultiPolygon.js\").default} multiPolygonGeometry MultiPolygon geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawMultiPolygon(multiPolygonGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/Point.js\").default|import(\"./Feature.js\").default} pointGeometry Point geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawPoint(pointGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/Polygon.js\").default|import(\"./Feature.js\").default} polygonGeometry Polygon geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawPolygon(polygonGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/SimpleGeometry.js\").default|import(\"./Feature.js\").default} geometry Geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawText(geometry, feature, index) {}\n\n /**\n * @param {import(\"../style/Fill.js\").default} fillStyle Fill style.\n * @param {import(\"../style/Stroke.js\").default} strokeStyle Stroke style.\n */\n setFillStrokeStyle(fillStyle, strokeStyle) {}\n\n /**\n * @param {import(\"../style/Image.js\").default} imageStyle Image style.\n * @param {import(\"../render/canvas.js\").DeclutterImageWithText} [declutterImageWithText] Shared data for combined decluttering with a text style.\n */\n setImageStyle(imageStyle, declutterImageWithText) {}\n\n /**\n * @param {import(\"../style/Text.js\").default} textStyle Text style.\n * @param {import(\"../render/canvas.js\").DeclutterImageWithText} [declutterImageWithText] Shared data for combined decluttering with an image style.\n */\n setTextStyle(textStyle, declutterImageWithText) {}\n}\n\nexport default VectorContext;\n","/**\n * @module ol/css\n */\n\n/**\n * @typedef {Object} FontParameters\n * @property {string} style Style.\n * @property {string} variant Variant.\n * @property {string} weight Weight.\n * @property {string} size Size.\n * @property {string} lineHeight LineHeight.\n * @property {string} family Family.\n * @property {Array} families Families.\n */\n\n/**\n * The CSS class for hidden feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_HIDDEN = 'ol-hidden';\n\n/**\n * The CSS class that we'll give the DOM elements to have them selectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_SELECTABLE = 'ol-selectable';\n\n/**\n * The CSS class that we'll give the DOM elements to have them unselectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSELECTABLE = 'ol-unselectable';\n\n/**\n * The CSS class for unsupported feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSUPPORTED = 'ol-unsupported';\n\n/**\n * The CSS class for controls.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_CONTROL = 'ol-control';\n\n/**\n * The CSS class that we'll give the DOM elements that are collapsed, i.e.\n * to those elements which usually can be expanded.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_COLLAPSED = 'ol-collapsed';\n\n/**\n * From https://stackoverflow.com/questions/10135697/regex-to-parse-any-css-font\n * @type {RegExp}\n */\nconst fontRegEx = new RegExp(\n [\n '^\\\\s*(?=(?:(?:[-a-z]+\\\\s*){0,2}(italic|oblique))?)',\n '(?=(?:(?:[-a-z]+\\\\s*){0,2}(small-caps))?)',\n '(?=(?:(?:[-a-z]+\\\\s*){0,2}(bold(?:er)?|lighter|[1-9]00 ))?)',\n '(?:(?:normal|\\\\1|\\\\2|\\\\3)\\\\s*){0,3}((?:xx?-)?',\n '(?:small|large)|medium|smaller|larger|[\\\\.\\\\d]+(?:\\\\%|in|[cem]m|ex|p[ctx]))',\n '(?:\\\\s*\\\\/\\\\s*(normal|[\\\\.\\\\d]+(?:\\\\%|in|[cem]m|ex|p[ctx])?))',\n '?\\\\s*([-,\\\\\"\\\\\\'\\\\sa-z0-9]+?)\\\\s*$',\n ].join(''),\n 'i',\n);\n/** @type {Array<'style'|'variant'|'weight'|'size'|'lineHeight'|'family'>} */\nconst fontRegExMatchIndex = [\n 'style',\n 'variant',\n 'weight',\n 'size',\n 'lineHeight',\n 'family',\n];\n\n/** @type {Object} */\nexport const fontWeights = {\n normal: 400,\n bold: 700,\n};\n\n/**\n * Get the list of font families from a font spec. Note that this doesn't work\n * for font families that have commas in them.\n * @param {string} fontSpec The CSS font property.\n * @return {FontParameters|null} The font parameters (or null if the input spec is invalid).\n */\nexport const getFontParameters = function (fontSpec) {\n const match = fontSpec.match(fontRegEx);\n if (!match) {\n return null;\n }\n const style = /** @type {FontParameters} */ ({\n lineHeight: 'normal',\n size: '1.2em',\n style: 'normal',\n weight: '400',\n variant: 'normal',\n });\n for (let i = 0, ii = fontRegExMatchIndex.length; i < ii; ++i) {\n const value = match[i + 1];\n if (value !== undefined) {\n style[fontRegExMatchIndex[i]] =\n typeof value === 'string' ? value.trim() : value;\n }\n }\n if (isNaN(Number(style.weight)) && style.weight in fontWeights) {\n style.weight = fontWeights[style.weight];\n }\n style.families = style.family\n .split(/,\\s?/)\n .map((f) => f.trim().replace(/^['\"]|['\"]$/g, ''));\n return style;\n};\n","/**\n * @module ol/render/canvas\n */\nimport BaseObject from '../Object.js';\nimport {fontWeights, getFontParameters} from '../css.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {WORKER_OFFSCREEN_CANVAS} from '../has.js';\nimport {clear} from '../obj.js';\n\n/**\n * @typedef {'Circle' | 'Image' | 'LineString' | 'Polygon' | 'Text' | 'Default'} BuilderType\n */\n\n/**\n * @typedef {Object} FillState\n * @property {import(\"../colorlike.js\").ColorLike} fillStyle FillStyle.\n */\n\n/**\n * @typedef Label\n * @property {number} width Width.\n * @property {number} height Height.\n * @property {Array} contextInstructions ContextInstructions.\n */\n\n/**\n * @typedef {Object} FillStrokeState\n * @property {import(\"../colorlike.js\").ColorLike} [currentFillStyle] Current FillStyle.\n * @property {import(\"../colorlike.js\").ColorLike} [currentStrokeStyle] Current StrokeStyle.\n * @property {CanvasLineCap} [currentLineCap] Current LineCap.\n * @property {Array} currentLineDash Current LineDash.\n * @property {number} [currentLineDashOffset] Current LineDashOffset.\n * @property {CanvasLineJoin} [currentLineJoin] Current LineJoin.\n * @property {number} [currentLineWidth] Current LineWidth.\n * @property {number} [currentMiterLimit] Current MiterLimit.\n * @property {number} [currentStrokeOffset] Current StrokeOffset.\n * @property {number} [lastStroke] Last stroke.\n * @property {import(\"../colorlike.js\").ColorLike} [fillStyle] FillStyle.\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle] StrokeStyle.\n * @property {CanvasLineCap} [lineCap] LineCap.\n * @property {Array} lineDash LineDash.\n * @property {number} [lineDashOffset] LineDashOffset.\n * @property {CanvasLineJoin} [lineJoin] LineJoin.\n * @property {number} [lineWidth] LineWidth.\n * @property {number} [miterLimit] MiterLimit.\n * @property {number} [strokeOffset] StrokeOffset.\n * @property {number} [fillPatternScale] Fill pattern scale.\n */\n\n/**\n * @typedef {Object} StrokeState\n * @property {CanvasLineCap} lineCap LineCap.\n * @property {Array} lineDash LineDash.\n * @property {number} lineDashOffset LineDashOffset.\n * @property {CanvasLineJoin} lineJoin LineJoin.\n * @property {number} lineWidth LineWidth.\n * @property {number} miterLimit MiterLimit.\n * @property {number} [strokeOffset] StrokeOffset.\n * @property {import(\"../colorlike.js\").ColorLike} strokeStyle StrokeStyle.\n */\n\n/**\n * @typedef {Object} TextState\n * @property {string} font Font.\n * @property {CanvasTextAlign} [textAlign] TextAlign.\n * @property {number} [repeat] Repeat.\n * @property {import(\"../style/Text.js\").TextJustify} [justify] Justify.\n * @property {CanvasTextBaseline} textBaseline TextBaseline.\n * @property {import(\"../style/Text.js\").TextPlacement} [placement] Placement.\n * @property {number} [maxAngle] MaxAngle.\n * @property {boolean} [overflow] Overflow.\n * @property {import(\"../style/Fill.js\").default} [backgroundFill] BackgroundFill.\n * @property {import(\"../style/Stroke.js\").default} [backgroundStroke] BackgroundStroke.\n * @property {import(\"../size.js\").Size} [scale] Scale.\n * @property {Array} [padding] Padding.\n */\n\n/**\n * @typedef {Object} SerializableInstructions\n * @property {Array<*>} instructions The rendering instructions.\n * @property {Array<*>} hitDetectionInstructions The rendering hit detection instructions.\n * @property {Array} coordinates The array of all coordinates.\n * @property {!Object} [textStates] The text states (decluttering).\n * @property {!Object} [fillStates] The fill states (decluttering).\n * @property {!Object} [strokeStates] The stroke states (decluttering).\n */\n\n/**\n * @typedef {Object} DeclutterImageWithText\n */\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultFont = '10px sans-serif';\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultFillStyle = '#000';\n\n/**\n * @const\n * @type {CanvasLineCap}\n */\nexport const defaultLineCap = 'round';\n\n/**\n * @const\n * @type {Array}\n */\nexport const defaultLineDash = [];\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineDashOffset = 0;\n\n/**\n * @const\n * @type {CanvasLineJoin}\n */\nexport const defaultLineJoin = 'round';\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultMiterLimit = 10;\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultStrokeOffset = 0;\n\n/**\n * @const\n * @type {import(\"../colorlike.js\").ColorLike}\n */\nexport const defaultStrokeStyle = '#000';\n\n/**\n * @const\n * @type {CanvasTextAlign}\n */\nexport const defaultTextAlign = 'center';\n\n/**\n * @const\n * @type {CanvasTextBaseline}\n */\nexport const defaultTextBaseline = 'middle';\n\n/**\n * @const\n * @type {Array}\n */\nexport const defaultPadding = [0, 0, 0, 0];\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineWidth = 1;\n\n/**\n * @type {BaseObject}\n */\nexport const checkedFonts = new BaseObject();\n\n/**\n * @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D}\n */\nlet measureContext = null;\n\n/**\n * @type {string}\n */\nlet measureFont;\n\n/**\n * @type {!Object}\n */\nexport const textHeights = {};\n\nconst genericFontFamilies = new Set([\n 'serif',\n 'sans-serif',\n 'monospace',\n 'cursive',\n 'fantasy',\n 'system-ui',\n 'ui-serif',\n 'ui-sans-serif',\n 'ui-monospace',\n 'ui-rounded',\n 'emoji',\n 'math',\n 'fangsong',\n]);\n\n/**\n * @param {string} style Css font-style\n * @param {string} weight Css font-weight\n * @param {string} family Css font-family\n * @return {string} Font key.\n */\nfunction getFontKey(style, weight, family) {\n return `${style} ${weight} 16px \"${family}\"`;\n}\n\n/**\n * Clears the label cache when a font becomes available.\n * @param {string} fontSpec CSS font spec.\n */\nexport const registerFont = (function () {\n const retries = 100;\n let timeout, fontFaceSet;\n\n /**\n * @param {string} fontSpec Css font spec\n * @return {Promise} Font with style and weight is available\n */\n async function isAvailable(fontSpec) {\n await fontFaceSet.ready;\n const font = getFontParameters(fontSpec);\n const checkFamily = font.families[0].toLowerCase();\n const checkWeight = font.weight;\n /** @type {Array} */\n const matching = [];\n fontFaceSet.forEach(\n /**\n * @param {FontFace} f Font face.\n */\n (f) => {\n const family = f.family.replace(/^['\"]|['\"]$/g, '').toLowerCase();\n const weight = fontWeights[f.weight] || f.weight;\n if (\n family === checkFamily &&\n f.style === font.style &&\n weight == checkWeight\n ) {\n matching.push(f);\n }\n },\n );\n if (matching.length === 0) {\n return false;\n }\n // Load each matching face with `FontFace.load()` instead of querying the\n // set with `FontFaceSet.load()`. The latter only resolves faces whose\n // `unicode-range` covers its (default) test string, so subset fonts -\n // e.g. those served by Google Fonts - would never be detected.\n const loaded = await Promise.all(\n matching.map((f) =>\n f.load().then(\n () => true, // available\n () => false, // not available\n ),\n ),\n );\n return loaded.some((available) => available);\n }\n\n async function check() {\n await fontFaceSet.ready;\n let done = true;\n const checkedFontsProperties = checkedFonts.getProperties();\n const fonts = Object.keys(checkedFontsProperties).filter(\n (key) => checkedFontsProperties[key] < retries,\n );\n for (let i = fonts.length - 1; i >= 0; --i) {\n const font = fonts[i];\n let currentRetries = checkedFontsProperties[font];\n if (currentRetries < retries) {\n if (await isAvailable(font)) {\n clear(textHeights);\n checkedFonts.set(font, retries);\n } else {\n currentRetries += 10;\n checkedFonts.set(font, currentRetries, true);\n if (currentRetries < retries) {\n done = false;\n }\n }\n }\n }\n timeout = undefined;\n if (!done) {\n timeout = setTimeout(check, 100);\n }\n }\n\n return async function (fontSpec) {\n if (!fontFaceSet) {\n fontFaceSet = WORKER_OFFSCREEN_CANVAS ? self.fonts : document.fonts;\n }\n const font = getFontParameters(fontSpec);\n if (!font) {\n return;\n }\n const families = font.families;\n let needCheck = false;\n for (const family of families) {\n if (genericFontFamilies.has(family)) {\n continue;\n }\n const key = getFontKey(font.style, font.weight, family);\n if (checkedFonts.get(key) !== undefined) {\n continue;\n }\n checkedFonts.set(key, 0, true);\n needCheck = true;\n }\n if (needCheck) {\n clearTimeout(timeout);\n timeout = setTimeout(check, 100);\n }\n };\n})();\n\n/**\n * @param {string} font Font to use for measuring.\n * @return {import(\"../size.js\").Size} Measurement.\n */\nexport const measureTextHeight = (function () {\n /**\n * @type {HTMLDivElement}\n */\n let measureElement;\n return function (fontSpec) {\n let height = textHeights[fontSpec];\n if (height == undefined) {\n if (WORKER_OFFSCREEN_CANVAS) {\n const font = getFontParameters(fontSpec);\n const metrics = measureText(fontSpec, 'Žg');\n const lineHeight = isNaN(Number(font.lineHeight))\n ? 1.2\n : Number(font.lineHeight);\n height =\n lineHeight *\n (metrics.actualBoundingBoxAscent + metrics.actualBoundingBoxDescent);\n } else {\n if (!measureElement) {\n measureElement = document.createElement('div');\n measureElement.innerHTML = 'M';\n measureElement.style.minHeight = '0';\n measureElement.style.maxHeight = 'none';\n measureElement.style.height = 'auto';\n measureElement.style.padding = '0';\n measureElement.style.border = 'none';\n measureElement.style.position = 'absolute';\n measureElement.style.display = 'block';\n measureElement.style.left = '-99999px';\n }\n measureElement.style.font = fontSpec;\n document.body.appendChild(measureElement);\n height = measureElement.offsetHeight;\n document.body.removeChild(measureElement);\n }\n textHeights[fontSpec] = height;\n }\n return height;\n };\n})();\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {TextMetrics} Text metrics.\n */\nfunction measureText(font, text) {\n if (!measureContext) {\n measureContext = createCanvasContext2D(1, 1);\n }\n if (font != measureFont) {\n measureContext.font = font;\n measureFont = measureContext.font;\n }\n return measureContext.measureText(text);\n}\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {number} Width.\n */\nexport function measureTextWidth(font, text) {\n return measureText(font, text).width;\n}\n\n/**\n * Measure text width using a cache.\n * @param {string} font The font.\n * @param {string} text The text to measure.\n * @param {Object} cache A lookup of cached widths by text.\n * @return {number} The text width.\n */\nexport function measureAndCacheTextWidth(font, text, cache) {\n if (text in cache) {\n return cache[text];\n }\n const width = text\n .split('\\n')\n .reduce((prev, curr) => Math.max(prev, measureTextWidth(font, curr)), 0);\n cache[text] = width;\n return width;\n}\n\n/**\n * @param {TextState} baseStyle Base style.\n * @param {Array} chunks Text chunks to measure.\n * @return {{width: number, height: number, widths: Array, heights: Array, lineWidths: Array}}} Text metrics.\n */\nexport function getTextDimensions(baseStyle, chunks) {\n const widths = [];\n const heights = [];\n const lineWidths = [];\n let width = 0;\n let lineWidth = 0;\n let height = 0;\n let lineHeight = 0;\n for (let i = 0, ii = chunks.length; i <= ii; i += 2) {\n const text = chunks[i];\n if (text === '\\n' || i === ii) {\n width = Math.max(width, lineWidth);\n lineWidths.push(lineWidth);\n lineWidth = 0;\n height += lineHeight;\n lineHeight = 0;\n continue;\n }\n const font = chunks[i + 1] || baseStyle.font;\n const currentWidth = measureTextWidth(font, text);\n widths.push(currentWidth);\n lineWidth += currentWidth;\n const currentHeight = measureTextHeight(font);\n heights.push(currentHeight);\n lineHeight = Math.max(lineHeight, currentHeight);\n }\n return {width, height, widths, heights, lineWidths};\n}\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {number} offsetX X offset.\n * @param {number} offsetY Y offset.\n */\nexport function rotateAtOffset(context, rotation, offsetX, offsetY) {\n if (rotation !== 0) {\n context.translate(offsetX, offsetY);\n context.rotate(rotation);\n context.translate(-offsetX, -offsetY);\n }\n}\n\n/**\n * @param {CanvasRenderingContext2D|import(\"../render/canvas/ZIndexContext.js\").ZIndexContextProxy} context Context.\n * @param {import(\"../transform.js\").Transform|null} transform Transform.\n * @param {number} opacity Opacity.\n * @param {Label|HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} labelOrImage Label.\n * @param {number} originX Origin X.\n * @param {number} originY Origin Y.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../size.js\").Size} scale Scale.\n */\nexport function drawImageOrLabel(\n context,\n transform,\n opacity,\n labelOrImage,\n originX,\n originY,\n w,\n h,\n x,\n y,\n scale,\n) {\n context.save();\n\n if (opacity !== 1) {\n if (context.globalAlpha === undefined) {\n context.globalAlpha = (context) => (context.globalAlpha *= opacity);\n } else {\n context.globalAlpha *= opacity;\n }\n }\n if (transform) {\n context.transform.apply(context, transform);\n }\n\n if (/** @type {*} */ (labelOrImage).contextInstructions) {\n // label\n context.translate(x, y);\n context.scale(scale[0], scale[1]);\n executeLabelInstructions(/** @type {Label} */ (labelOrImage), context);\n } else if (scale[0] < 0 || scale[1] < 0) {\n // flipped image\n context.translate(x, y);\n context.scale(scale[0], scale[1]);\n context.drawImage(\n /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (\n labelOrImage\n ),\n originX,\n originY,\n w,\n h,\n 0,\n 0,\n w,\n h,\n );\n } else {\n // if image not flipped translate and scale can be avoided\n context.drawImage(\n /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (\n labelOrImage\n ),\n originX,\n originY,\n w,\n h,\n x,\n y,\n w * scale[0],\n h * scale[1],\n );\n }\n\n context.restore();\n}\n\n/**\n * @param {Label} label Label.\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context Context.\n */\nfunction executeLabelInstructions(label, context) {\n const contextInstructions = label.contextInstructions;\n for (let i = 0, ii = contextInstructions.length; i < ii; i += 2) {\n if (Array.isArray(contextInstructions[i + 1])) {\n context[contextInstructions[i]].apply(\n context,\n contextInstructions[i + 1],\n );\n } else {\n context[contextInstructions[i]] = contextInstructions[i + 1];\n }\n }\n}\n","/**\n * @module ol/render/canvas/Immediate\n */\n// FIXME test, especially polygons with holes and multipolygons\n// FIXME need to handle large thick features (where pixel size matters)\n// FIXME add offset and end to ol/geom/flat/transform~transform2D?\n\nimport {equals} from '../../array.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {intersects} from '../../extent.js';\nimport {transformGeom2D} from '../../geom/SimpleGeometry.js';\nimport {\n offsetLineString,\n removeOffsetCycles,\n} from '../../geom/flat/lineoffset.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {toFixed} from '../../math.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../../transform.js';\nimport VectorContext from '../VectorContext.js';\nimport {\n defaultFillStyle,\n defaultFont,\n defaultLineCap,\n defaultLineDash,\n defaultLineDashOffset,\n defaultLineJoin,\n defaultLineWidth,\n defaultMiterLimit,\n defaultStrokeStyle,\n defaultTextAlign,\n defaultTextBaseline,\n} from '../canvas.js';\n\n/**\n * @classdesc\n * A concrete subclass of {@link module:ol/render/VectorContext~VectorContext} that implements\n * direct rendering of features and geometries to an HTML5 Canvas context.\n * Instances of this class are created internally by the library and\n * provided to application code as vectorContext member of the\n * {@link module:ol/render/Event~RenderEvent} object associated with postcompose, precompose and\n * render events emitted by layers and maps.\n */\nclass CanvasImmediateRenderer extends VectorContext {\n /**\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context Context.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {number} viewRotation View rotation.\n * @param {number} [squaredTolerance] Optional squared tolerance for simplification.\n * @param {import(\"../../proj.js\").TransformFunction} [userTransform] Transform from user to view projection.\n */\n constructor(\n context,\n pixelRatio,\n extent,\n transform,\n viewRotation,\n squaredTolerance,\n userTransform,\n ) {\n super();\n\n /**\n * @private\n * @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D}\n */\n this.context_ = context;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @private\n * @type {import(\"../../extent.js\").Extent}\n */\n this.extent_ = extent;\n\n /**\n * @private\n * @type {import(\"../../transform.js\").Transform}\n */\n this.transform_ = transform;\n\n /**\n * @private\n * @type {number}\n */\n this.transformRotation_ = transform\n ? toFixed(Math.atan2(transform[1], transform[0]), 10)\n : 0;\n\n /**\n * @private\n * @type {number}\n */\n this.viewRotation_ = viewRotation;\n\n /**\n * @private\n * @type {number}\n */\n this.squaredTolerance_ = squaredTolerance;\n\n /**\n * @private\n * @type {import(\"../../proj.js\").TransformFunction}\n */\n this.userTransform_ = userTransform;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.contextFillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.contextStrokeState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").TextState}\n */\n this.contextTextState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.fillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.strokeState_ = null;\n\n /**\n * @private\n * @type {import('../../DataTile.js').ImageLike}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.imageAnchorX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageAnchorY_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageHeight_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOpacity_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOriginX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOriginY_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.imageRotateWithView_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.imageRotation_ = 0;\n\n /**\n * @private\n * @type {import(\"../../size.js\").Size}\n */\n this.imageScale_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.imageWidth_ = 0;\n\n /**\n * @private\n * @type {string}\n */\n this.text_ = '';\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetY_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.textRotateWithView_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.textRotation_ = 0;\n\n /**\n * @private\n * @type {import(\"../../size.js\").Size}\n */\n this.textScale_ = [0, 0];\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.textFillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.textStrokeState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").TextState}\n */\n this.textState_ = null;\n\n /**\n * @private\n * @type {Array}\n */\n this.pixelCoordinates_ = [];\n\n /**\n * @private\n * @type {import(\"../../transform.js\").Transform}\n */\n this.tmpLocalTransform_ = createTransform();\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n */\n drawImages_(flatCoordinates, offset, end, stride) {\n if (!this.image_) {\n return;\n }\n const pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_,\n );\n const context = this.context_;\n const localTransform = this.tmpLocalTransform_;\n const alpha = context.globalAlpha;\n if (this.imageOpacity_ != 1) {\n context.globalAlpha = alpha * this.imageOpacity_;\n }\n let rotation = this.imageRotation_;\n if (this.transformRotation_ === 0) {\n rotation -= this.viewRotation_;\n }\n if (this.imageRotateWithView_) {\n rotation += this.viewRotation_;\n }\n for (let i = 0, ii = pixelCoordinates.length; i < ii; i += 2) {\n const x = pixelCoordinates[i] - this.imageAnchorX_;\n const y = pixelCoordinates[i + 1] - this.imageAnchorY_;\n if (\n rotation !== 0 ||\n this.imageScale_[0] != 1 ||\n this.imageScale_[1] != 1\n ) {\n const centerX = x + this.imageAnchorX_;\n const centerY = y + this.imageAnchorY_;\n composeTransform(\n localTransform,\n centerX,\n centerY,\n 1,\n 1,\n rotation,\n -centerX,\n -centerY,\n );\n context.save();\n context.transform.apply(context, localTransform);\n context.translate(centerX, centerY);\n context.scale(this.imageScale_[0], this.imageScale_[1]);\n context.drawImage(\n this.image_,\n this.imageOriginX_,\n this.imageOriginY_,\n this.imageWidth_,\n this.imageHeight_,\n -this.imageAnchorX_,\n -this.imageAnchorY_,\n this.imageWidth_,\n this.imageHeight_,\n );\n context.restore();\n } else {\n context.drawImage(\n this.image_,\n this.imageOriginX_,\n this.imageOriginY_,\n this.imageWidth_,\n this.imageHeight_,\n x,\n y,\n this.imageWidth_,\n this.imageHeight_,\n );\n }\n }\n if (this.imageOpacity_ != 1) {\n context.globalAlpha = alpha;\n }\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n */\n drawText_(flatCoordinates, offset, end, stride) {\n if (!this.textState_ || this.text_ === '') {\n return;\n }\n if (this.textFillState_) {\n this.setContextFillState_(this.textFillState_);\n }\n if (this.textStrokeState_) {\n this.setContextStrokeState_(this.textStrokeState_);\n }\n this.setContextTextState_(this.textState_);\n const pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_,\n );\n const context = this.context_;\n let rotation = this.textRotation_;\n if (this.transformRotation_ === 0) {\n rotation -= this.viewRotation_;\n }\n if (this.textRotateWithView_) {\n rotation += this.viewRotation_;\n }\n for (; offset < end; offset += stride) {\n const x = pixelCoordinates[offset] + this.textOffsetX_;\n const y = pixelCoordinates[offset + 1] + this.textOffsetY_;\n if (\n rotation !== 0 ||\n this.textScale_[0] != 1 ||\n this.textScale_[1] != 1\n ) {\n context.save();\n context.translate(x - this.textOffsetX_, y - this.textOffsetY_);\n context.rotate(rotation);\n context.translate(this.textOffsetX_, this.textOffsetY_);\n context.scale(this.textScale_[0], this.textScale_[1]);\n if (this.textStrokeState_) {\n context.strokeText(this.text_, 0, 0);\n }\n if (this.textFillState_) {\n context.fillText(this.text_, 0, 0);\n }\n context.restore();\n } else {\n if (this.textStrokeState_) {\n context.strokeText(this.text_, x, y);\n }\n if (this.textFillState_) {\n context.fillText(this.text_, x, y);\n }\n }\n }\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {boolean} close Close.\n * @param {number} [strokeOffset] Stroke Offset.\n * @private\n * @return {number} end End.\n */\n moveToLineTo_(flatCoordinates, offset, end, stride, close, strokeOffset) {\n const context = this.context_;\n let pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_,\n );\n if (Math.abs(strokeOffset) > 0) {\n const n = pixelCoordinates.length;\n const isClosedLine =\n close ||\n (Math.abs(pixelCoordinates[0] - pixelCoordinates[n - 2]) < 1e-6 &&\n Math.abs(pixelCoordinates[1] - pixelCoordinates[n - 1]) < 1e-6);\n pixelCoordinates = offsetLineString(\n pixelCoordinates,\n 0,\n n,\n 2,\n strokeOffset,\n isClosedLine,\n pixelCoordinates,\n );\n removeOffsetCycles(pixelCoordinates, 2, isClosedLine);\n }\n context.moveTo(pixelCoordinates[0], pixelCoordinates[1]);\n let length = pixelCoordinates.length;\n if (close) {\n length -= 2;\n }\n for (let i = 2; i < length; i += 2) {\n context.lineTo(pixelCoordinates[i], pixelCoordinates[i + 1]);\n }\n if (close) {\n context.closePath();\n }\n return end;\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} [strokeOffset] Stroke Offset.\n * @private\n * @return {number} End.\n */\n drawRings_(flatCoordinates, offset, ends, stride, strokeOffset) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.moveToLineTo_(\n flatCoordinates,\n offset,\n ends[i],\n stride,\n true,\n strokeOffset,\n );\n }\n return offset;\n }\n\n /**\n * Render a circle geometry into the canvas. Rendering is immediate and uses\n * the current fill and stroke styles.\n *\n * @param {import(\"../../geom/Circle.js\").default} geometry Circle geometry.\n * @api\n * @override\n */\n drawCircle(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/Circle.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.fillState_ || this.strokeState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const pixelCoordinates = transformGeom2D(\n geometry,\n this.transform_,\n this.pixelCoordinates_,\n );\n const dx = pixelCoordinates[2] - pixelCoordinates[0];\n const dy = pixelCoordinates[3] - pixelCoordinates[1];\n const radius = Math.sqrt(dx * dx + dy * dy);\n const context = this.context_;\n context.beginPath();\n context.arc(\n pixelCoordinates[0],\n pixelCoordinates[1],\n radius,\n 0,\n 2 * Math.PI,\n );\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n this.drawText_(geometry.getCenter(), 0, 2, 2);\n }\n }\n\n /**\n * Set the rendering style. Note that since this is an immediate rendering API,\n * any `zIndex` on the provided style will be ignored.\n *\n * @param {import(\"../../style/Style.js\").default} style The rendering style.\n * @api\n * @override\n */\n setStyle(style) {\n this.setFillStrokeStyle(style.getFill(), style.getStroke());\n this.setImageStyle(style.getImage());\n this.setTextStyle(style.getText());\n }\n\n /**\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n */\n setTransform(transform) {\n this.transform_ = transform;\n }\n\n /**\n * Render a geometry into the canvas. Call\n * {@link module:ol/render/canvas/Immediate~CanvasImmediateRenderer#setStyle renderer.setStyle()} first to set the rendering style.\n *\n * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry The geometry to render.\n * @api\n * @override\n */\n drawGeometry(geometry) {\n const type = geometry.getType();\n switch (type) {\n case 'Point':\n this.drawPoint(\n /** @type {import(\"../../geom/Point.js\").default} */ (geometry),\n );\n break;\n case 'LineString':\n this.drawLineString(\n /** @type {import(\"../../geom/LineString.js\").default} */ (geometry),\n );\n break;\n case 'Polygon':\n this.drawPolygon(\n /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry),\n );\n break;\n case 'MultiPoint':\n this.drawMultiPoint(\n /** @type {import(\"../../geom/MultiPoint.js\").default} */ (geometry),\n );\n break;\n case 'MultiLineString':\n this.drawMultiLineString(\n /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n geometry\n ),\n );\n break;\n case 'MultiPolygon':\n this.drawMultiPolygon(\n /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n geometry\n ),\n );\n break;\n case 'GeometryCollection':\n this.drawGeometryCollection(\n /** @type {import(\"../../geom/GeometryCollection.js\").default} */ (\n geometry\n ),\n );\n break;\n case 'Circle':\n this.drawCircle(\n /** @type {import(\"../../geom/Circle.js\").default} */ (geometry),\n );\n break;\n default:\n }\n }\n\n /**\n * Render a feature into the canvas. Note that any `zIndex` on the provided\n * style will be ignored - features are rendered immediately in the order that\n * this method is called. If you need `zIndex` support, you should be using an\n * {@link module:ol/layer/Vector~VectorLayer} instead.\n *\n * @param {import(\"../../Feature.js\").default} feature Feature.\n * @param {import(\"../../style/Style.js\").default} style Style.\n * @api\n * @override\n */\n drawFeature(feature, style) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry) {\n return;\n }\n this.setStyle(style);\n this.drawGeometry(geometry);\n }\n\n /**\n * Render a GeometryCollection to the canvas. Rendering is immediate and\n * uses the current styles appropriate for each geometry in the collection.\n *\n * @param {import(\"../../geom/GeometryCollection.js\").default} geometry Geometry collection.\n * @override\n */\n drawGeometryCollection(geometry) {\n const geometries = geometry.getGeometriesArray();\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n this.drawGeometry(geometries[i]);\n }\n }\n\n /**\n * Render a Point geometry into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/Point.js\").default|import(\"../Feature.js\").default} geometry Point geometry.\n * @override\n */\n drawPoint(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/Point.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n if (this.image_) {\n this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n if (this.text_ !== '') {\n this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n }\n\n /**\n * Render a MultiPoint geometry into the canvas. Rendering is immediate and\n * uses the current style.\n *\n * @param {import(\"../../geom/MultiPoint.js\").default|import(\"../Feature.js\").default} geometry MultiPoint geometry.\n * @override\n */\n drawMultiPoint(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/MultiPoint.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n if (this.image_) {\n this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n if (this.text_ !== '') {\n this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n }\n\n /**\n * Render a LineString into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/LineString.js\").default|import(\"../Feature.js\").default} geometry LineString geometry.\n * @override\n */\n drawLineString(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/LineString.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n const context = this.context_;\n const flatCoordinates = geometry.getFlatCoordinates();\n context.beginPath();\n this.moveToLineTo_(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n geometry.getStride(),\n false,\n this.strokeState_.strokeOffset,\n );\n context.stroke();\n }\n if (this.text_ !== '') {\n const flatMidpoint = geometry.getFlatMidpoint();\n this.drawText_(flatMidpoint, 0, 2, 2);\n }\n }\n\n /**\n * Render a MultiLineString geometry into the canvas. Rendering is immediate\n * and uses the current style.\n *\n * @param {import(\"../../geom/MultiLineString.js\").default|import(\"../Feature.js\").default} geometry MultiLineString geometry.\n * @override\n */\n drawMultiLineString(geometry) {\n if (this.squaredTolerance_) {\n geometry =\n /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n const geometryExtent = geometry.getExtent();\n if (!intersects(this.extent_, geometryExtent)) {\n return;\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n const context = this.context_;\n const flatCoordinates = geometry.getFlatCoordinates();\n let offset = 0;\n const ends = /** @type {Array} */ (geometry.getEnds());\n const stride = geometry.getStride();\n context.beginPath();\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.moveToLineTo_(\n flatCoordinates,\n offset,\n ends[i],\n stride,\n false,\n this.strokeState_.strokeOffset,\n );\n }\n context.stroke();\n }\n if (this.text_ !== '') {\n const flatMidpoints = geometry.getFlatMidpoints();\n this.drawText_(flatMidpoints, 0, flatMidpoints.length, 2);\n }\n }\n\n /**\n * Render a Polygon geometry into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/Polygon.js\").default|import(\"../Feature.js\").default} geometry Polygon geometry.\n * @override\n */\n drawPolygon(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/Polygon.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_ || this.fillState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const context = this.context_;\n context.beginPath();\n this.drawRings_(\n geometry.getOrientedFlatCoordinates(),\n 0,\n /** @type {Array} */ (geometry.getEnds()),\n geometry.getStride(),\n this.strokeState_?.strokeOffset,\n );\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n const flatInteriorPoint = geometry.getFlatInteriorPoint();\n this.drawText_(flatInteriorPoint, 0, 2, 2);\n }\n }\n\n /**\n * Render MultiPolygon geometry into the canvas. Rendering is immediate and\n * uses the current style.\n * @param {import(\"../../geom/MultiPolygon.js\").default} geometry MultiPolygon geometry.\n * @override\n */\n drawMultiPolygon(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_ || this.fillState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const context = this.context_;\n const flatCoordinates = geometry.getOrientedFlatCoordinates();\n let offset = 0;\n const endss = geometry.getEndss();\n const stride = geometry.getStride();\n context.beginPath();\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n offset = this.drawRings_(\n flatCoordinates,\n offset,\n ends,\n stride,\n this.strokeState_?.strokeOffset,\n );\n }\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n const flatInteriorPoints = geometry.getFlatInteriorPoints();\n this.drawText_(flatInteriorPoints, 0, flatInteriorPoints.length, 2);\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").FillState} fillState Fill state.\n * @private\n */\n setContextFillState_(fillState) {\n const context = this.context_;\n const contextFillState = this.contextFillState_;\n if (!contextFillState) {\n context.fillStyle = fillState.fillStyle;\n this.contextFillState_ = {\n fillStyle: fillState.fillStyle,\n };\n } else {\n if (contextFillState.fillStyle != fillState.fillStyle) {\n contextFillState.fillStyle = fillState.fillStyle;\n context.fillStyle = fillState.fillStyle;\n }\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").StrokeState} strokeState Stroke state.\n * @private\n */\n setContextStrokeState_(strokeState) {\n const context = this.context_;\n const contextStrokeState = this.contextStrokeState_;\n if (!contextStrokeState) {\n context.lineCap = strokeState.lineCap;\n context.setLineDash(strokeState.lineDash);\n context.lineDashOffset = strokeState.lineDashOffset;\n context.lineJoin = strokeState.lineJoin;\n context.lineWidth = strokeState.lineWidth;\n context.miterLimit = strokeState.miterLimit;\n context.strokeStyle = strokeState.strokeStyle;\n this.contextStrokeState_ = {\n lineCap: strokeState.lineCap,\n lineDash: strokeState.lineDash,\n lineDashOffset: strokeState.lineDashOffset,\n lineJoin: strokeState.lineJoin,\n lineWidth: strokeState.lineWidth,\n miterLimit: strokeState.miterLimit,\n strokeStyle: strokeState.strokeStyle,\n };\n } else {\n if (contextStrokeState.lineCap != strokeState.lineCap) {\n contextStrokeState.lineCap = strokeState.lineCap;\n context.lineCap = strokeState.lineCap;\n }\n if (!equals(contextStrokeState.lineDash, strokeState.lineDash)) {\n context.setLineDash(\n (contextStrokeState.lineDash = strokeState.lineDash),\n );\n }\n if (contextStrokeState.lineDashOffset != strokeState.lineDashOffset) {\n contextStrokeState.lineDashOffset = strokeState.lineDashOffset;\n context.lineDashOffset = strokeState.lineDashOffset;\n }\n if (contextStrokeState.lineJoin != strokeState.lineJoin) {\n contextStrokeState.lineJoin = strokeState.lineJoin;\n context.lineJoin = strokeState.lineJoin;\n }\n if (contextStrokeState.lineWidth != strokeState.lineWidth) {\n contextStrokeState.lineWidth = strokeState.lineWidth;\n context.lineWidth = strokeState.lineWidth;\n }\n if (contextStrokeState.miterLimit != strokeState.miterLimit) {\n contextStrokeState.miterLimit = strokeState.miterLimit;\n context.miterLimit = strokeState.miterLimit;\n }\n if (contextStrokeState.strokeStyle != strokeState.strokeStyle) {\n contextStrokeState.strokeStyle = strokeState.strokeStyle;\n context.strokeStyle = strokeState.strokeStyle;\n }\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").TextState} textState Text state.\n * @private\n */\n setContextTextState_(textState) {\n const context = this.context_;\n const contextTextState = this.contextTextState_;\n const textAlign = textState.textAlign\n ? textState.textAlign\n : defaultTextAlign;\n if (!contextTextState) {\n context.font = textState.font;\n context.textAlign = textAlign;\n context.textBaseline = textState.textBaseline;\n this.contextTextState_ = {\n font: textState.font,\n textAlign: textAlign,\n textBaseline: textState.textBaseline,\n };\n } else {\n if (contextTextState.font != textState.font) {\n contextTextState.font = textState.font;\n context.font = textState.font;\n }\n if (contextTextState.textAlign != textAlign) {\n contextTextState.textAlign = textAlign;\n context.textAlign = textAlign;\n }\n if (contextTextState.textBaseline != textState.textBaseline) {\n contextTextState.textBaseline = textState.textBaseline;\n context.textBaseline = textState.textBaseline;\n }\n }\n }\n\n /**\n * Set the fill and stroke style for subsequent draw operations. To clear\n * either fill or stroke styles, pass null for the appropriate parameter.\n *\n * @param {import(\"../../style/Fill.js\").default} fillStyle Fill style.\n * @param {import(\"../../style/Stroke.js\").default} strokeStyle Stroke style.\n * @override\n */\n setFillStrokeStyle(fillStyle, strokeStyle) {\n if (!fillStyle) {\n this.fillState_ = null;\n } else {\n const fillStyleColor = fillStyle.getColor();\n this.fillState_ = {\n fillStyle: asColorLike(\n fillStyleColor ? fillStyleColor : defaultFillStyle,\n ),\n };\n }\n if (!strokeStyle) {\n this.strokeState_ = null;\n } else {\n const strokeStyleColor = strokeStyle.getColor();\n const strokeStyleLineCap = strokeStyle.getLineCap();\n const strokeStyleLineDash = strokeStyle.getLineDash();\n const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n const strokeStyleLineJoin = strokeStyle.getLineJoin();\n const strokeStyleWidth = strokeStyle.getWidth();\n const strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n const lineDash = strokeStyleLineDash\n ? strokeStyleLineDash\n : defaultLineDash;\n const strokeOffset = strokeStyle.getOffset();\n this.strokeState_ = {\n lineCap:\n strokeStyleLineCap !== undefined\n ? strokeStyleLineCap\n : defaultLineCap,\n lineDash:\n this.pixelRatio_ === 1\n ? lineDash\n : lineDash.map((n) => n * this.pixelRatio_),\n lineDashOffset:\n (strokeStyleLineDashOffset\n ? strokeStyleLineDashOffset\n : defaultLineDashOffset) * this.pixelRatio_,\n lineJoin:\n strokeStyleLineJoin !== undefined\n ? strokeStyleLineJoin\n : defaultLineJoin,\n lineWidth:\n (strokeStyleWidth !== undefined\n ? strokeStyleWidth\n : defaultLineWidth) * this.pixelRatio_,\n miterLimit:\n strokeStyleMiterLimit !== undefined\n ? strokeStyleMiterLimit\n : defaultMiterLimit,\n strokeStyle: asColorLike(\n strokeStyleColor ? strokeStyleColor : defaultStrokeStyle,\n ),\n strokeOffset: (strokeOffset ?? 0) * this.pixelRatio_,\n };\n }\n }\n\n /**\n * Set the image style for subsequent draw operations. Pass null to remove\n * the image style.\n *\n * @param {import(\"../../style/Image.js\").default} imageStyle Image style.\n * @override\n */\n setImageStyle(imageStyle) {\n let imageSize;\n if (!imageStyle || !(imageSize = imageStyle.getSize())) {\n this.image_ = null;\n return;\n }\n const imagePixelRatio = imageStyle.getPixelRatio(this.pixelRatio_);\n const imageAnchor = imageStyle.getAnchor();\n const imageOrigin = imageStyle.getOrigin();\n this.image_ = imageStyle.getImage(this.pixelRatio_);\n this.imageAnchorX_ = imageAnchor[0] * imagePixelRatio;\n this.imageAnchorY_ = imageAnchor[1] * imagePixelRatio;\n this.imageHeight_ = imageSize[1] * imagePixelRatio;\n this.imageOpacity_ = imageStyle.getOpacity();\n this.imageOriginX_ = imageOrigin[0];\n this.imageOriginY_ = imageOrigin[1];\n this.imageRotateWithView_ = imageStyle.getRotateWithView();\n this.imageRotation_ = imageStyle.getRotation();\n const imageScale = imageStyle.getScaleArray();\n this.imageScale_ = [\n (imageScale[0] * this.pixelRatio_) / imagePixelRatio,\n (imageScale[1] * this.pixelRatio_) / imagePixelRatio,\n ];\n this.imageWidth_ = imageSize[0] * imagePixelRatio;\n }\n\n /**\n * Set the text style for subsequent draw operations. Pass null to\n * remove the text style.\n *\n * @param {import(\"../../style/Text.js\").default} textStyle Text style.\n * @override\n */\n setTextStyle(textStyle) {\n if (!textStyle) {\n this.text_ = '';\n } else {\n const textFillStyle = textStyle.getFill();\n if (!textFillStyle) {\n this.textFillState_ = null;\n } else {\n const textFillStyleColor = textFillStyle.getColor();\n this.textFillState_ = {\n fillStyle: asColorLike(\n textFillStyleColor ? textFillStyleColor : defaultFillStyle,\n ),\n };\n }\n const textStrokeStyle = textStyle.getStroke();\n if (!textStrokeStyle) {\n this.textStrokeState_ = null;\n } else {\n const textStrokeStyleColor = textStrokeStyle.getColor();\n const textStrokeStyleLineCap = textStrokeStyle.getLineCap();\n const textStrokeStyleLineDash = textStrokeStyle.getLineDash();\n const textStrokeStyleLineDashOffset =\n textStrokeStyle.getLineDashOffset();\n const textStrokeStyleLineJoin = textStrokeStyle.getLineJoin();\n const textStrokeStyleWidth = textStrokeStyle.getWidth();\n const textStrokeStyleMiterLimit = textStrokeStyle.getMiterLimit();\n this.textStrokeState_ = {\n lineCap:\n textStrokeStyleLineCap !== undefined\n ? textStrokeStyleLineCap\n : defaultLineCap,\n lineDash: textStrokeStyleLineDash\n ? textStrokeStyleLineDash\n : defaultLineDash,\n lineDashOffset: textStrokeStyleLineDashOffset\n ? textStrokeStyleLineDashOffset\n : defaultLineDashOffset,\n lineJoin:\n textStrokeStyleLineJoin !== undefined\n ? textStrokeStyleLineJoin\n : defaultLineJoin,\n lineWidth:\n textStrokeStyleWidth !== undefined\n ? textStrokeStyleWidth\n : defaultLineWidth,\n miterLimit:\n textStrokeStyleMiterLimit !== undefined\n ? textStrokeStyleMiterLimit\n : defaultMiterLimit,\n strokeStyle: asColorLike(\n textStrokeStyleColor ? textStrokeStyleColor : defaultStrokeStyle,\n ),\n };\n }\n const textFont = textStyle.getFont();\n const textOffsetX = textStyle.getOffsetX();\n const textOffsetY = textStyle.getOffsetY();\n const textRotateWithView = textStyle.getRotateWithView();\n const textRotation = textStyle.getRotation();\n const textScale = textStyle.getScaleArray();\n const textText = textStyle.getText();\n const textTextAlign = textStyle.getTextAlign();\n const textTextBaseline = textStyle.getTextBaseline();\n this.textState_ = {\n font: textFont !== undefined ? textFont : defaultFont,\n textAlign:\n textTextAlign !== undefined ? textTextAlign : defaultTextAlign,\n textBaseline:\n textTextBaseline !== undefined\n ? textTextBaseline\n : defaultTextBaseline,\n };\n this.text_ =\n textText !== undefined\n ? Array.isArray(textText)\n ? textText.reduce((acc, t, i) => (acc += i % 2 ? ' ' : t), '')\n : textText\n : '';\n this.textOffsetX_ =\n textOffsetX !== undefined ? this.pixelRatio_ * textOffsetX : 0;\n this.textOffsetY_ =\n textOffsetY !== undefined ? this.pixelRatio_ * textOffsetY : 0;\n this.textRotateWithView_ =\n textRotateWithView !== undefined ? textRotateWithView : false;\n this.textRotation_ = textRotation !== undefined ? textRotation : 0;\n this.textScale_ = [\n this.pixelRatio_ * textScale[0],\n this.pixelRatio_ * textScale[1],\n ];\n }\n }\n}\n\nexport default CanvasImmediateRenderer;\n","/**\n * @module ol/renderer/vector\n */\nimport ImageState from '../ImageState.js';\nimport {getUid} from '../util.js';\n\n/**\n * Feature callback. The callback will be called with three arguments. The first\n * argument is one {@link module:ol/Feature~Feature feature} or {@link module:ol/render/Feature~RenderFeature render feature}\n * at the pixel, the second is the {@link module:ol/layer/Layer~Layer layer} of the feature and will be null for\n * unmanaged layers. The third is the {@link module:ol/geom/SimpleGeometry~SimpleGeometry} of the feature. For features\n * with a GeometryCollection geometry, it will be the first detected geometry from the collection.\n * @template T\n * @typedef {function(import(\"../Feature.js\").FeatureLike, import(\"../layer/Layer.js\").default, import(\"../geom/SimpleGeometry.js\").default): T} FeatureCallback\n */\n\n/**\n * Tolerance for geometry simplification in device pixels.\n * @type {number}\n */\nconst SIMPLIFY_TOLERANCE = 0.5;\n\n/**\n * @const\n * @type {Object}\n */\nconst GEOMETRY_RENDERERS = {\n 'Point': renderPointGeometry,\n 'LineString': renderLineStringGeometry,\n 'Polygon': renderPolygonGeometry,\n 'MultiPoint': renderMultiPointGeometry,\n 'MultiLineString': renderMultiLineStringGeometry,\n 'MultiPolygon': renderMultiPolygonGeometry,\n 'GeometryCollection': renderGeometryCollectionGeometry,\n 'Circle': renderCircleGeometry,\n};\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature1 Feature 1.\n * @param {import(\"../Feature.js\").FeatureLike} feature2 Feature 2.\n * @return {number} Order.\n */\nexport function defaultOrder(feature1, feature2) {\n return parseInt(getUid(feature1), 10) - parseInt(getUid(feature2), 10);\n}\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Squared pixel tolerance.\n */\nexport function getSquaredTolerance(resolution, pixelRatio) {\n const tolerance = getTolerance(resolution, pixelRatio);\n return tolerance * tolerance;\n}\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel tolerance.\n */\nexport function getTolerance(resolution, pixelRatio) {\n return (SIMPLIFY_TOLERANCE * resolution) / pixelRatio;\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Builder group.\n * @param {import(\"../geom/Circle.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderCircleGeometry(builderGroup, geometry, style, feature, index) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (fillStyle || strokeStyle) {\n const circleReplay = builderGroup.getBuilder(style.getZIndex(), 'Circle');\n circleReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n circleReplay.drawCircle(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Transform from user to view projection.\n * @param {boolean} [declutter] Enable decluttering.\n * @param {number} [index] Render order index..\n * @return {boolean} `true` if style is loading.\n */\nexport function renderFeature(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n listener,\n transform,\n declutter,\n index,\n) {\n const loadingPromises = [];\n const imageStyle = style.getImage();\n if (imageStyle) {\n let loading = true;\n const imageState = imageStyle.getImageState();\n if (imageState == ImageState.LOADED || imageState == ImageState.ERROR) {\n loading = false;\n } else {\n if (imageState == ImageState.IDLE) {\n imageStyle.load();\n }\n }\n if (loading) {\n loadingPromises.push(imageStyle.ready());\n }\n }\n const fillStyle = style.getFill();\n if (fillStyle && fillStyle.loading()) {\n loadingPromises.push(fillStyle.ready());\n }\n const loading = loadingPromises.length > 0;\n if (loading) {\n Promise.all(loadingPromises).then(() => listener(null));\n }\n renderFeatureInternal(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n transform,\n declutter,\n index,\n );\n\n return loading;\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @param {boolean} [declutter] Enable decluttering.\n * @param {number} [index] Render order index..\n */\nfunction renderFeatureInternal(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n transform,\n declutter,\n index,\n) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry) {\n return;\n }\n const simplifiedGeometry = geometry.simplifyTransformed(\n squaredTolerance,\n transform,\n );\n const renderer = style.getRenderer();\n if (renderer) {\n renderGeometry(replayGroup, simplifiedGeometry, style, feature, index);\n } else {\n const geometryRenderer = GEOMETRY_RENDERERS[simplifiedGeometry.getType()];\n geometryRenderer(\n replayGroup,\n simplifiedGeometry,\n style,\n feature,\n index,\n declutter,\n );\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderGeometry(replayGroup, geometry, style, feature, index) {\n if (geometry.getType() == 'GeometryCollection') {\n const geometries =\n /** @type {import(\"../geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n renderGeometry(replayGroup, geometries[i], style, feature, index);\n }\n return;\n }\n const replay = replayGroup.getBuilder(style.getZIndex(), 'Default');\n replay.drawCustom(\n /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (geometry),\n feature,\n style.getRenderer(),\n style.getHitDetectionRenderer(),\n index,\n );\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/GeometryCollection.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n * @param {number} [index] Render order index.\n */\nfunction renderGeometryCollectionGeometry(\n replayGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup,\n index,\n) {\n const geometries = geometry.getGeometriesArray();\n let i, ii;\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n const geometryRenderer = GEOMETRY_RENDERERS[geometries[i].getType()];\n geometryRenderer(\n replayGroup,\n geometries[i],\n style,\n feature,\n declutterBuilderGroup,\n index,\n );\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/LineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderLineStringGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n) {\n const strokeStyle = style.getStroke();\n if (strokeStyle) {\n const lineStringReplay = builderGroup.getBuilder(\n style.getZIndex(),\n 'LineString',\n );\n lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n lineStringReplay.drawLineString(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderMultiLineStringGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n) {\n const strokeStyle = style.getStroke();\n if (strokeStyle) {\n const lineStringReplay = builderGroup.getBuilder(\n style.getZIndex(),\n 'LineString',\n );\n lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n lineStringReplay.drawMultiLineString(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderMultiPolygonGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (strokeStyle || fillStyle) {\n const polygonReplay = builderGroup.getBuilder(style.getZIndex(), 'Polygon');\n polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n polygonReplay.drawMultiPolygon(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/Point.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n * @param {boolean} [declutter] Enable decluttering.\n */\nfunction renderPointGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n declutter,\n) {\n const imageStyle = style.getImage();\n const textStyle = style.getText();\n const hasText = textStyle && textStyle.getText();\n /** @type {import(\"../render/canvas.js\").DeclutterImageWithText} */\n const declutterImageWithText =\n declutter && imageStyle && hasText ? {} : undefined;\n if (imageStyle) {\n if (imageStyle.getImageState() != ImageState.LOADED) {\n return;\n }\n const imageReplay = builderGroup.getBuilder(style.getZIndex(), 'Image');\n imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n imageReplay.drawPoint(geometry, feature, index);\n }\n if (hasText) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle, declutterImageWithText);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n * @param {boolean} [declutter] Enable decluttering.\n */\nfunction renderMultiPointGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n declutter,\n) {\n const imageStyle = style.getImage();\n const hasImage = imageStyle && imageStyle.getOpacity() !== 0;\n const textStyle = style.getText();\n const hasText = textStyle && textStyle.getText();\n /** @type {import(\"../render/canvas.js\").DeclutterImageWithText} */\n const declutterImageWithText =\n declutter && hasImage && hasText ? {} : undefined;\n if (hasImage) {\n if (imageStyle.getImageState() != ImageState.LOADED) {\n return;\n }\n const imageReplay = builderGroup.getBuilder(style.getZIndex(), 'Image');\n imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n imageReplay.drawMultiPoint(geometry, feature, index);\n }\n if (hasText) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle, declutterImageWithText);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/Polygon.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderPolygonGeometry(builderGroup, geometry, style, feature, index) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (fillStyle || strokeStyle) {\n const polygonReplay = builderGroup.getBuilder(style.getZIndex(), 'Polygon');\n polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n polygonReplay.drawPolygon(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n","/**\n * @module ol/render/EventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered before a layer is rendered.\n * @event module:ol/render/Event~RenderEvent#prerender\n * @api\n */\n PRERENDER: 'prerender',\n\n /**\n * Triggered after a layer is rendered.\n * @event module:ol/render/Event~RenderEvent#postrender\n * @api\n */\n POSTRENDER: 'postrender',\n\n /**\n * Triggered before layers are composed. When dispatched by the map, the event object will not have\n * a `context` set. When dispatched by a layer, the event object will have a `context` set. Only\n * WebGL layers currently dispatch this event.\n * @event module:ol/render/Event~RenderEvent#precompose\n * @api\n */\n PRECOMPOSE: 'precompose',\n\n /**\n * Triggered after layers are composed. When dispatched by the map, the event object will not have\n * a `context` set. When dispatched by a layer, the event object will have a `context` set. Only\n * WebGL layers currently dispatch this event.\n * @event module:ol/render/Event~RenderEvent#postcompose\n * @api\n */\n POSTCOMPOSE: 'postcompose',\n\n /**\n * Triggered when rendering is complete, i.e. all sources and tiles have\n * finished loading for the current viewport, and all tiles are faded in.\n * The event object will not have a `context` set.\n * @event module:ol/render/Event~RenderEvent#rendercomplete\n * @api\n */\n RENDERCOMPLETE: 'rendercomplete',\n};\n\n/**\n * @typedef {'postrender'|'precompose'|'postcompose'|'rendercomplete'} MapRenderEventTypes\n */\n\n/**\n * @typedef {'postrender'|'prerender'} LayerRenderEventTypes\n */\n","/**\n * @module ol/featureloader\n */\n\n/**\n *\n * @type {boolean}\n * @private\n */\nlet withCredentials = false;\n\n/**\n * {@link module:ol/source/Vector~VectorSource} sources use a function of this type to\n * load features.\n *\n * This function takes 3 arguments: an {@link module:ol/extent~Extent} representing\n * the area to be loaded, a `{number}` representing the resolution (map units per pixel), and a\n * {@link module:ol/proj/Projection~Projection} for the projection. The function is expeced to return\n * a promise that resolves to an array of features.\n *\n * There are also a deprecated signature, with `void` as\n * return, and two additional arguments: an optional success callback that should get\n * the loaded features passed as an argument and an optional failure callback with no arguments.\n *\n * The function is responsible for loading the features and adding them to the\n * source.\n *\n * @template {import(\"./Feature.js\").FeatureLike} [FeatureType=import(\"./Feature.js\").FeatureLike]\n * @typedef {(\n * extent: import(\"./extent.js\").Extent,\n * resolution: number,\n * projection: import(\"./proj/Projection.js\").default,\n * success?: (features: Array) => void,\n * failure?: () => void) => void|Promise>} FeatureLoader\n * @api\n */\n\n/**\n * {@link module:ol/source/Vector~VectorSource} sources use a function of this type to\n * get the url to load features from.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area\n * to be loaded, a `{number}` representing the resolution (map units per pixel)\n * and an {@link module:ol/proj/Projection~Projection} for the projection as\n * arguments and returns a `{string}` representing the URL.\n * @typedef {function(import(\"./extent.js\").Extent, number, import(\"./proj/Projection.js\").default): string} FeatureUrlFunction\n * @api\n */\n\n/**\n * @template {import(\"./Feature.js\").FeatureLike} [FeatureType=import(\"./Feature.js\").default]\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {function(Array, import(\"./proj/Projection.js\").default): void} success Success\n * Function called with the loaded features and optionally with the data projection.\n * @param {function(): void} failure Failure\n * Function called when loading failed.\n */\nexport function loadFeaturesXhr(\n url,\n format,\n extent,\n resolution,\n projection,\n success,\n failure,\n) {\n const xhr = new XMLHttpRequest();\n xhr.open(\n 'GET',\n typeof url === 'function' ? url(extent, resolution, projection) : url,\n true,\n );\n if (format.getType() == 'arraybuffer') {\n xhr.responseType = 'arraybuffer';\n }\n xhr.withCredentials = withCredentials;\n /**\n * @param {Event} event Event.\n * @private\n */\n xhr.onload = function (event) {\n // status will be 0 for file:// urls\n if (!xhr.status || (xhr.status >= 200 && xhr.status < 300)) {\n const type = format.getType();\n try {\n /** @type {Document|Node|Object|string|undefined} */\n let source;\n if (type == 'text' || type == 'json') {\n source = xhr.responseText;\n } else if (type == 'xml') {\n source = xhr.responseXML || xhr.responseText;\n } else if (type == 'arraybuffer') {\n source = /** @type {ArrayBuffer} */ (xhr.response);\n }\n if (source) {\n success(\n /** @type {Array} */\n (\n format.readFeatures(source, {\n extent: extent,\n featureProjection: projection,\n })\n ),\n format.readProjection(source),\n );\n } else {\n failure();\n }\n } catch {\n failure();\n }\n } else {\n failure();\n }\n };\n /**\n * @private\n */\n xhr.onerror = failure;\n xhr.send();\n}\n\n/**\n * Create an XHR feature loader for a `url` and `format`. The feature loader\n * loads features (with XHR), parses the features, and adds them to the\n * vector source.\n *\n * @template {import(\"./Feature.js\").FeatureLike} [FeatureType=import(\"./Feature.js\").default]\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @return {FeatureLoader} The feature loader.\n * @api\n */\nexport function xhr(url, format) {\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {function(Array): void} [success] Success\n * Function called when loading succeeded.\n * @param {function(): void} [failure] Failure\n * Function called when loading failed.\n * @this {import(\"./source/Vector.js\").default}\n */\n return function (extent, resolution, projection, success, failure) {\n loadFeaturesXhr(\n url,\n format,\n extent,\n resolution,\n projection,\n /**\n * @param {Array} features The loaded features.\n * @param {import(\"./proj/Projection.js\").default} dataProjection Data\n * projection.\n */\n (features, dataProjection) => {\n this.addFeatures(features);\n if (success !== undefined) {\n success(features);\n }\n },\n () => {\n this.changed();\n if (failure !== undefined) {\n failure();\n }\n },\n );\n };\n}\n\n/**\n * Setter for the withCredentials configuration for the XHR.\n *\n * @param {boolean} xhrWithCredentials The value of withCredentials to set.\n * Compare https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/\n * @api\n */\nexport function setWithCredentials(xhrWithCredentials) {\n withCredentials = xhrWithCredentials;\n}\n","/**\n * @module ol/loadingstrategy\n */\n\nimport {fromUserExtent, fromUserResolution, toUserExtent} from './proj.js';\n\n/**\n * Strategy function for loading all features with a single request.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array} Extents.\n * @api\n */\nexport function all(extent, resolution) {\n return [[-Infinity, -Infinity, Infinity, Infinity]];\n}\n\n/**\n * Strategy function for loading features based on the view's extent and\n * resolution.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array} Extents.\n * @api\n */\nexport function bbox(extent, resolution) {\n return [extent];\n}\n\n/**\n * Creates a strategy function for loading features based on a tile grid.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {function(import(\"./extent.js\").Extent, number, import(\"./proj.js\").Projection): Array} Loading strategy.\n * @api\n */\nexport function tile(tileGrid) {\n return (\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj.js\").Projection} projection Projection.\n * @return {Array} Extents.\n */\n function (extent, resolution, projection) {\n const z = tileGrid.getZForResolution(\n fromUserResolution(resolution, projection),\n );\n const tileRange = tileGrid.getTileRangeForExtentAndZ(\n fromUserExtent(extent, projection),\n z,\n );\n /** @type {Array} */\n const extents = [];\n /** @type {import(\"./tilecoord.js\").TileCoord} */\n const tileCoord = [z, 0, 0];\n for (\n tileCoord[1] = tileRange.minX;\n tileCoord[1] <= tileRange.maxX;\n ++tileCoord[1]\n ) {\n for (\n tileCoord[2] = tileRange.minY;\n tileCoord[2] <= tileRange.maxY;\n ++tileCoord[2]\n ) {\n extents.push(\n toUserExtent(tileGrid.getTileCoordExtent(tileCoord), projection),\n );\n }\n }\n return extents;\n }\n );\n}\n","/**\n * @module ol/geom/MultiLineString\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport LineString from './LineString.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {arrayMaxSquaredDelta, assignClosestArrayPoint} from './flat/closest.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {\n interpolatePoint,\n lineStringsCoordinateAtM,\n} from './flat/interpolate.js';\nimport {intersectsLineStringArray} from './flat/intersectsextent.js';\nimport {lineStringLength} from './flat/length.js';\nimport {douglasPeuckerArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-linestring geometry.\n *\n * @api\n */\nclass MultiLineString extends SimpleGeometry {\n /**\n * @param {Array|LineString>|Array} coordinates\n * Coordinates or LineString geometries. (For internal use, flat coordinates in\n * combination with `layout` and `ends` are also accepted.)\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @param {Array} [ends] Flat coordinate ends for internal use.\n */\n constructor(coordinates, layout, ends) {\n super();\n\n /**\n * @type {Array}\n * @private\n */\n this.ends_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n if (Array.isArray(coordinates[0])) {\n this.setCoordinates(\n /** @type {Array>} */ (\n coordinates\n ),\n layout,\n );\n } else if (layout !== undefined && ends) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n this.ends_ = ends;\n } else {\n const lineStrings = /** @type {Array} */ (coordinates);\n /** @type {Array} */\n const flatCoordinates = [];\n const ends = [];\n for (let i = 0, ii = lineStrings.length; i < ii; ++i) {\n const lineString = lineStrings[i];\n extend(flatCoordinates, lineString.getFlatCoordinates());\n ends.push(flatCoordinates.length);\n }\n const layout =\n lineStrings.length === 0\n ? this.getLayout()\n : lineStrings[0].getLayout();\n this.setFlatCoordinates(layout, flatCoordinates);\n this.ends_ = ends;\n }\n }\n\n /**\n * Append the passed linestring to the multilinestring.\n * @param {LineString} lineString LineString.\n * @api\n */\n appendLineString(lineString) {\n extend(this.flatCoordinates, lineString.getFlatCoordinates().slice());\n this.ends_.push(this.flatCoordinates.length);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!MultiLineString} Clone.\n * @api\n * @override\n */\n clone() {\n const multiLineString = new MultiLineString(\n this.flatCoordinates.slice(),\n this.layout,\n this.ends_.slice(),\n );\n multiLineString.applyProperties(this);\n return multiLineString;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n arrayMaxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestArrayPoint(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n this.maxDelta_,\n false,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * Returns the coordinate at `m` using linear interpolation, or `null` if no\n * such coordinate exists.\n *\n * `extrapolate` controls extrapolation beyond the range of Ms in the\n * MultiLineString. If `extrapolate` is `true` then Ms less than the first\n * M will return the first coordinate and Ms greater than the last M will\n * return the last coordinate.\n *\n * `interpolate` controls interpolation between consecutive LineStrings\n * within the MultiLineString. If `interpolate` is `true` the coordinates\n * will be linearly interpolated between the last coordinate of one LineString\n * and the first coordinate of the next LineString. If `interpolate` is\n * `false` then the function will return `null` for Ms falling between\n * LineStrings.\n *\n * @param {number} m M.\n * @param {boolean} [extrapolate] Extrapolate. Default is `false`.\n * @param {boolean} [interpolate] Interpolate. Default is `false`.\n * @return {import(\"../coordinate.js\").Coordinate|null} Coordinate.\n * @api\n */\n getCoordinateAtM(m, extrapolate, interpolate) {\n if (\n (this.layout != 'XYM' && this.layout != 'XYZM') ||\n this.flatCoordinates.length === 0\n ) {\n return null;\n }\n extrapolate = extrapolate !== undefined ? extrapolate : false;\n interpolate = interpolate !== undefined ? interpolate : false;\n return lineStringsCoordinateAtM(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n m,\n extrapolate,\n interpolate,\n );\n }\n\n /**\n * Return the coordinates of the multilinestring.\n * @return {Array>} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return inflateCoordinatesArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n );\n }\n\n /**\n * @return {Array} Ends.\n */\n getEnds() {\n return this.ends_;\n }\n\n /**\n * Return the linestring at the specified index.\n * @param {number} index Index.\n * @return {LineString} LineString.\n * @api\n */\n getLineString(index) {\n if (index < 0 || this.ends_.length <= index) {\n return null;\n }\n return new LineString(\n this.flatCoordinates.slice(\n index === 0 ? 0 : this.ends_[index - 1],\n this.ends_[index],\n ),\n this.layout,\n );\n }\n\n /**\n * Return the linestrings of this multilinestring.\n * @return {Array} LineStrings.\n * @api\n */\n getLineStrings() {\n const flatCoordinates = this.flatCoordinates;\n const ends = this.ends_;\n const layout = this.layout;\n /** @type {Array} */\n const lineStrings = [];\n let offset = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const lineString = new LineString(\n flatCoordinates.slice(offset, end),\n layout,\n );\n lineStrings.push(lineString);\n offset = end;\n }\n return lineStrings;\n }\n\n /**\n * Return the sum of all line string lengths\n * @return {number} Length (on projected plane).\n * @api\n */\n getLength() {\n const ends = this.ends_;\n let start = 0;\n let length = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n length += lineStringLength(\n this.flatCoordinates,\n start,\n ends[i],\n this.stride,\n );\n start = ends[i];\n }\n return length;\n }\n\n /**\n * @return {Array} Flat midpoints.\n */\n getFlatMidpoints() {\n /** @type {Array} */\n const midpoints = [];\n const flatCoordinates = this.flatCoordinates;\n let offset = 0;\n const ends = this.ends_;\n const stride = this.stride;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const midpoint = interpolatePoint(\n flatCoordinates,\n offset,\n end,\n stride,\n 0.5,\n );\n extend(midpoints, midpoint);\n offset = end;\n }\n return midpoints;\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {MultiLineString} Simplified MultiLineString.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n /** @type {Array} */\n const simplifiedEnds = [];\n simplifiedFlatCoordinates.length = douglasPeuckerArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds,\n );\n return new MultiLineString(simplifiedFlatCoordinates, 'XY', simplifiedEnds);\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'MultiLineString';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLineStringArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n extent,\n );\n }\n\n /**\n * Set the coordinates of the multilinestring.\n * @param {!Array>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 2);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const ends = deflateCoordinatesArray(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n this.ends_,\n );\n this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n this.changed();\n }\n}\n\nexport default MultiLineString;\n","/**\n * @module ol/geom/MultiPoint\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, containsXY} from '../extent.js';\nimport {squaredDistance as squaredDx} from '../math.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\n\n/**\n * @classdesc\n * Multi-point geometry.\n *\n * @api\n */\nclass MultiPoint extends SimpleGeometry {\n /**\n * @param {Array|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n if (layout && !Array.isArray(coordinates[0])) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n } else {\n this.setCoordinates(\n /** @type {Array} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Append the passed point to this multipoint.\n * @param {Point} point Point.\n * @api\n */\n appendPoint(point) {\n extend(this.flatCoordinates, point.getFlatCoordinates());\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!MultiPoint} Clone.\n * @api\n * @override\n */\n clone() {\n const multiPoint = new MultiPoint(\n this.flatCoordinates.slice(),\n this.layout,\n );\n multiPoint.applyProperties(this);\n return multiPoint;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n const flatCoordinates = this.flatCoordinates;\n const stride = this.stride;\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const squaredDistance = squaredDx(\n x,\n y,\n flatCoordinates[i],\n flatCoordinates[i + 1],\n );\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (let j = 0; j < stride; ++j) {\n closestPoint[j] = flatCoordinates[i + j];\n }\n closestPoint.length = stride;\n }\n }\n return minSquaredDistance;\n }\n\n /**\n * Return the coordinates of the multipoint.\n * @return {Array} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return inflateCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * Return the point at the specified index.\n * @param {number} index Index.\n * @return {Point} Point.\n * @api\n */\n getPoint(index) {\n const n = this.flatCoordinates.length / this.stride;\n if (index < 0 || n <= index) {\n return null;\n }\n return new Point(\n this.flatCoordinates.slice(\n index * this.stride,\n (index + 1) * this.stride,\n ),\n this.layout,\n );\n }\n\n /**\n * Return the points of this multipoint.\n * @return {Array} Points.\n * @api\n */\n getPoints() {\n const flatCoordinates = this.flatCoordinates;\n const layout = this.layout;\n const stride = this.stride;\n /** @type {Array} */\n const points = [];\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const point = new Point(flatCoordinates.slice(i, i + stride), layout);\n points.push(point);\n }\n return points;\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'MultiPoint';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n const flatCoordinates = this.flatCoordinates;\n const stride = this.stride;\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const x = flatCoordinates[i];\n const y = flatCoordinates[i + 1];\n if (containsXY(extent, x, y)) {\n return true;\n }\n }\n return false;\n }\n\n /**\n * Set the coordinates of the multipoint.\n * @param {!Array} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n );\n this.changed();\n }\n}\n\nexport default MultiPoint;\n","/**\n * @module ol/geom/flat/center\n */\nimport {createEmpty, createOrUpdateFromFlatCoordinates} from '../../extent.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @return {Array} Flat centers.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n const flatCenters = [];\n let extent = createEmpty();\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n extent = createOrUpdateFromFlatCoordinates(\n flatCoordinates,\n offset,\n ends[0],\n stride,\n );\n flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);\n offset = ends[ends.length - 1];\n }\n return flatCenters;\n}\n","/**\n * @module ol/geom/MultiPolygon\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport MultiPoint from './MultiPoint.js';\nimport Polygon from './Polygon.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRingss as linearRingssArea} from './flat/area.js';\nimport {linearRingss as linearRingssCenter} from './flat/center.js';\nimport {\n assignClosestMultiArrayPoint,\n multiArrayMaxSquaredDelta,\n} from './flat/closest.js';\nimport {linearRingssContainsXY} from './flat/contains.js';\nimport {deflateMultiCoordinatesArray} from './flat/deflate.js';\nimport {inflateMultiCoordinatesArray} from './flat/inflate.js';\nimport {getInteriorPointsOfMultiArray} from './flat/interiorpoint.js';\nimport {intersectsLinearRingMultiArray} from './flat/intersectsextent.js';\nimport {\n linearRingssAreOriented,\n orientLinearRingsArray,\n} from './flat/orient.js';\nimport {quantizeMultiArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-polygon geometry.\n *\n * @api\n */\nclass MultiPolygon extends SimpleGeometry {\n /**\n * @param {Array>|Polygon>|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` and `endss` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @param {Array>} [endss] Array of ends for internal use with flat coordinates.\n */\n constructor(coordinates, layout, endss) {\n super();\n\n /**\n * @type {Array>}\n * @private\n */\n this.endss_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.flatInteriorPointsRevision_ = -1;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.flatInteriorPoints_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.orientedRevision_ = -1;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.orientedFlatCoordinates_ = null;\n\n if (!endss && !Array.isArray(coordinates[0])) {\n const polygons = /** @type {Array} */ (coordinates);\n /** @type {Array} */\n const flatCoordinates = [];\n const thisEndss = [];\n for (let i = 0, ii = polygons.length; i < ii; ++i) {\n const polygon = polygons[i];\n const offset = flatCoordinates.length;\n const ends = polygon.getEnds();\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n ends[j] += offset;\n }\n extend(flatCoordinates, polygon.getFlatCoordinates());\n thisEndss.push(ends);\n }\n layout =\n polygons.length === 0 ? this.getLayout() : polygons[0].getLayout();\n coordinates = flatCoordinates;\n endss = thisEndss;\n }\n if (layout !== undefined && endss) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n this.endss_ = endss;\n } else {\n this.setCoordinates(\n /** @type {Array>>} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Append the passed polygon to this multipolygon.\n * @param {Polygon} polygon Polygon.\n * @api\n */\n appendPolygon(polygon) {\n /** @type {Array} */\n let ends;\n if (!this.flatCoordinates) {\n this.flatCoordinates = polygon.getFlatCoordinates().slice();\n ends = polygon.getEnds().slice();\n this.endss_.push();\n } else {\n const offset = this.flatCoordinates.length;\n extend(this.flatCoordinates, polygon.getFlatCoordinates());\n ends = polygon.getEnds().slice();\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n ends[i] += offset;\n }\n }\n this.endss_.push(ends);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!MultiPolygon} Clone.\n * @api\n * @override\n */\n clone() {\n const len = this.endss_.length;\n const newEndss = new Array(len);\n for (let i = 0; i < len; ++i) {\n newEndss[i] = this.endss_[i].slice();\n }\n\n const multiPolygon = new MultiPolygon(\n this.flatCoordinates.slice(),\n this.layout,\n newEndss,\n );\n multiPolygon.applyProperties(this);\n\n return multiPolygon;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n multiArrayMaxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestMultiArrayPoint(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n this.maxDelta_,\n true,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n * @override\n */\n containsXY(x, y) {\n return linearRingssContainsXY(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n x,\n y,\n );\n }\n\n /**\n * Return the area of the multipolygon on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\n getArea() {\n return linearRingssArea(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n );\n }\n\n /**\n * Get the coordinate array for this geometry. This array has the structure\n * of a GeoJSON coordinate array for multi-polygons.\n *\n * @param {boolean} [right] Orient coordinates according to the right-hand\n * rule (counter-clockwise for exterior and clockwise for interior rings).\n * If `false`, coordinates will be oriented according to the left-hand rule\n * (clockwise for exterior and counter-clockwise for interior rings).\n * By default, coordinate orientation will depend on how the geometry was\n * constructed.\n * @return {Array>>} Coordinates.\n * @api\n * @override\n */\n getCoordinates(right) {\n let flatCoordinates;\n if (right !== undefined) {\n flatCoordinates = this.getOrientedFlatCoordinates().slice();\n orientLinearRingsArray(\n flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n right,\n );\n } else {\n flatCoordinates = this.flatCoordinates;\n }\n\n return inflateMultiCoordinatesArray(\n flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n );\n }\n\n /**\n * @return {Array>} Endss.\n */\n getEndss() {\n return this.endss_;\n }\n\n /**\n * @return {Array} Flat interior points.\n */\n getFlatInteriorPoints() {\n if (this.flatInteriorPointsRevision_ != this.getRevision()) {\n const flatCenters = linearRingssCenter(\n this.flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n );\n this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n flatCenters,\n );\n this.flatInteriorPointsRevision_ = this.getRevision();\n }\n return /** @type {Array} */ (this.flatInteriorPoints_);\n }\n\n /**\n * Return the interior points as {@link module:ol/geom/MultiPoint~MultiPoint multipoint}.\n * @return {MultiPoint} Interior points as XYM coordinates, where M is\n * the length of the horizontal intersection that the point belongs to.\n * @api\n */\n getInteriorPoints() {\n return new MultiPoint(this.getFlatInteriorPoints().slice(), 'XYM');\n }\n\n /**\n * @return {Array} Oriented flat coordinates.\n */\n getOrientedFlatCoordinates() {\n if (this.orientedRevision_ != this.getRevision()) {\n const flatCoordinates = this.flatCoordinates;\n if (\n linearRingssAreOriented(flatCoordinates, 0, this.endss_, this.stride)\n ) {\n this.orientedFlatCoordinates_ = flatCoordinates;\n } else {\n this.orientedFlatCoordinates_ = flatCoordinates.slice();\n this.orientedFlatCoordinates_.length = orientLinearRingsArray(\n this.orientedFlatCoordinates_,\n 0,\n this.endss_,\n this.stride,\n );\n }\n this.orientedRevision_ = this.getRevision();\n }\n return /** @type {Array} */ (this.orientedFlatCoordinates_);\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {MultiPolygon} Simplified MultiPolygon.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n /** @type {Array>} */\n const simplifiedEndss = [];\n simplifiedFlatCoordinates.length = quantizeMultiArray(\n this.flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates,\n 0,\n simplifiedEndss,\n );\n return new MultiPolygon(simplifiedFlatCoordinates, 'XY', simplifiedEndss);\n }\n\n /**\n * Return the polygon at the specified index.\n * @param {number} index Index.\n * @return {Polygon} Polygon.\n * @api\n */\n getPolygon(index) {\n if (index < 0 || this.endss_.length <= index) {\n return null;\n }\n let offset;\n if (index === 0) {\n offset = 0;\n } else {\n const prevEnds = this.endss_[index - 1];\n offset = prevEnds[prevEnds.length - 1];\n }\n const ends = this.endss_[index].slice();\n const end = ends[ends.length - 1];\n if (offset !== 0) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n ends[i] -= offset;\n }\n }\n return new Polygon(\n this.flatCoordinates.slice(offset, end),\n this.layout,\n ends,\n );\n }\n\n /**\n * Return the polygons of this multipolygon.\n * @return {Array} Polygons.\n * @api\n */\n getPolygons() {\n const layout = this.layout;\n const flatCoordinates = this.flatCoordinates;\n const endss = this.endss_;\n const polygons = [];\n let offset = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i].slice();\n const end = ends[ends.length - 1];\n if (offset !== 0) {\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n ends[j] -= offset;\n }\n }\n const polygon = new Polygon(\n flatCoordinates.slice(offset, end),\n layout,\n ends,\n );\n polygons.push(polygon);\n offset = end;\n }\n return polygons;\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'MultiPolygon';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLinearRingMultiArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n extent,\n );\n }\n\n /**\n * Set the coordinates of the multipolygon.\n * @param {!Array>>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 3);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const endss = deflateMultiCoordinatesArray(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n this.endss_,\n );\n if (endss.length === 0) {\n this.flatCoordinates.length = 0;\n } else {\n const lastEnds = endss[endss.length - 1];\n this.flatCoordinates.length =\n lastEnds.length === 0 ? 0 : lastEnds[lastEnds.length - 1];\n }\n this.changed();\n }\n}\n\nexport default MultiPolygon;\n","/**\n * @module ol/render/Feature\n */\nimport Feature from '../Feature.js';\nimport {extend} from '../array.js';\nimport {\n createOrUpdateFromCoordinate,\n createOrUpdateFromFlatCoordinates,\n getCenter,\n getHeight,\n} from '../extent.js';\nimport {memoizeOne} from '../functions.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {linearRingss as linearRingssCenter} from '../geom/flat/center.js';\nimport {\n getInteriorPointOfArray,\n getInteriorPointsOfMultiArray,\n} from '../geom/flat/interiorpoint.js';\nimport {interpolatePoint} from '../geom/flat/interpolate.js';\nimport {inflateEnds} from '../geom/flat/orient.js';\nimport {\n douglasPeucker,\n douglasPeuckerArray,\n quantizeArray,\n} from '../geom/flat/simplify.js';\nimport {transform2D} from '../geom/flat/transform.js';\nimport {get as getProjection} from '../proj.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../transform.js';\n\n/**\n * @typedef {'Point' | 'LineString' | 'LinearRing' | 'Polygon' | 'MultiPoint' | 'MultiLineString'} Type\n * The geometry type. One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'` or 'MultiLineString'`.\n */\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nconst tmpTransform = createTransform();\n\n/**\n * Lightweight, read-only, {@link module:ol/Feature~Feature} and {@link module:ol/geom/Geometry~Geometry} like\n * structure, optimized for vector tile rendering and styling. Geometry access\n * through the API is limited to getting the type and extent of the geometry.\n */\nclass RenderFeature {\n /**\n * @param {Type} type Geometry type.\n * @param {Array} flatCoordinates Flat coordinates. These always need\n * to be right-handed for polygons.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {Object} properties Properties.\n * @param {number|string|undefined} id Feature id.\n */\n constructor(type, flatCoordinates, ends, stride, properties, id) {\n /**\n * @type {import(\"../style/Style.js\").StyleFunction|undefined}\n */\n this.styleFunction;\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent|undefined}\n */\n this.extent_;\n\n /**\n * @private\n * @type {number|string|undefined}\n */\n this.id_ = id;\n\n /**\n * @private\n * @type {Type}\n */\n this.type_ = type;\n\n /**\n * @private\n * @type {Array}\n */\n this.flatCoordinates_ = flatCoordinates;\n\n /**\n * @private\n * @type {Array}\n */\n this.flatInteriorPoints_ = null;\n\n /**\n * @private\n * @type {Array}\n */\n this.flatMidpoints_ = null;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.ends_ = ends || null;\n\n /**\n * @private\n * @type {Object}\n */\n this.properties_ = properties;\n\n /**\n * @private\n * @type {number}\n */\n this.squaredTolerance_;\n\n /**\n * @private\n * @type {number}\n */\n this.stride_ = stride;\n\n /**\n * @private\n * @type {RenderFeature}\n */\n this.simplifiedGeometry_;\n }\n\n /**\n * Get a feature property by its key.\n * @param {string} key Key\n * @return {*} Value for the requested key.\n * @api\n */\n get(key) {\n return this.properties_[key];\n }\n\n /**\n * Get the extent of this feature's geometry.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getExtent() {\n if (!this.extent_) {\n this.extent_ =\n this.type_ === 'Point'\n ? createOrUpdateFromCoordinate(this.flatCoordinates_)\n : createOrUpdateFromFlatCoordinates(\n this.flatCoordinates_,\n 0,\n this.flatCoordinates_.length,\n this.stride_,\n );\n }\n return this.extent_;\n }\n\n /**\n * @return {Array} Flat interior points.\n */\n getFlatInteriorPoint() {\n if (!this.flatInteriorPoints_) {\n const flatCenter = getCenter(this.getExtent());\n this.flatInteriorPoints_ = getInteriorPointOfArray(\n this.flatCoordinates_,\n 0,\n this.ends_,\n this.stride_,\n flatCenter,\n 0,\n );\n }\n return this.flatInteriorPoints_;\n }\n\n /**\n * @return {Array} Flat interior points.\n */\n getFlatInteriorPoints() {\n if (!this.flatInteriorPoints_) {\n const ends = inflateEnds(this.flatCoordinates_, this.ends_);\n const flatCenters = linearRingssCenter(\n this.flatCoordinates_,\n 0,\n ends,\n this.stride_,\n );\n this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n this.flatCoordinates_,\n 0,\n ends,\n this.stride_,\n flatCenters,\n );\n }\n return this.flatInteriorPoints_;\n }\n\n /**\n * @return {Array} Flat midpoint.\n */\n getFlatMidpoint() {\n if (!this.flatMidpoints_) {\n this.flatMidpoints_ = interpolatePoint(\n this.flatCoordinates_,\n 0,\n this.flatCoordinates_.length,\n this.stride_,\n 0.5,\n );\n }\n return this.flatMidpoints_;\n }\n\n /**\n * @return {Array} Flat midpoints.\n */\n getFlatMidpoints() {\n if (!this.flatMidpoints_) {\n this.flatMidpoints_ = [];\n const flatCoordinates = this.flatCoordinates_;\n let offset = 0;\n const ends = /** @type {Array} */ (this.ends_);\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const midpoint = interpolatePoint(\n flatCoordinates,\n offset,\n end,\n this.stride_,\n 0.5,\n );\n extend(this.flatMidpoints_, midpoint);\n offset = end;\n }\n }\n return this.flatMidpoints_;\n }\n\n /**\n * Get the feature identifier. This is a stable identifier for the feature and\n * is set when reading data from a remote source.\n * @return {number|string|undefined} Id.\n * @api\n */\n getId() {\n return this.id_;\n }\n\n /**\n * @return {Array} Flat coordinates.\n */\n getOrientedFlatCoordinates() {\n return this.flatCoordinates_;\n }\n\n /**\n * For API compatibility with {@link module:ol/Feature~Feature}, this method is useful when\n * determining the geometry type in style function (see {@link #getType}).\n * @return {RenderFeature} Feature.\n * @api\n */\n getGeometry() {\n return this;\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {RenderFeature} Simplified geometry.\n */\n getSimplifiedGeometry(squaredTolerance) {\n return this;\n }\n\n /**\n * Get a transformed and simplified version of the geometry.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @return {RenderFeature} Simplified geometry.\n */\n simplifyTransformed(squaredTolerance, transform) {\n return this;\n }\n\n /**\n * Get the feature properties.\n * @return {Object} Feature properties.\n * @api\n */\n getProperties() {\n return this.properties_;\n }\n\n /**\n * Get an object of all property names and values. This has the same behavior as getProperties,\n * but is here to conform with the {@link module:ol/Feature~Feature} interface.\n * @return {Object?} Object.\n */\n getPropertiesInternal() {\n return this.properties_;\n }\n\n /**\n * @return {number} Stride.\n */\n getStride() {\n return this.stride_;\n }\n\n /**\n * @return {import('../style/Style.js').StyleFunction|undefined} Style\n */\n getStyleFunction() {\n return this.styleFunction;\n }\n\n /**\n * Get the type of this feature's geometry.\n * @return {Type} Geometry type.\n * @api\n */\n getType() {\n return this.type_;\n }\n\n /**\n * Transform geometry coordinates from tile pixel space to projected.\n *\n * @param {import(\"../proj.js\").ProjectionLike} projection The data projection\n */\n transform(projection) {\n projection = getProjection(projection);\n const pixelExtent = projection.getExtent();\n const projectedExtent = projection.getWorldExtent();\n if (pixelExtent && projectedExtent) {\n const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n composeTransform(\n tmpTransform,\n projectedExtent[0],\n projectedExtent[3],\n scale,\n -scale,\n 0,\n 0,\n 0,\n );\n transform2D(\n this.flatCoordinates_,\n 0,\n this.flatCoordinates_.length,\n this.stride_,\n tmpTransform,\n this.flatCoordinates_,\n );\n }\n }\n\n /**\n * Apply a transform function to the coordinates of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n */\n applyTransform(transformFn) {\n transformFn(this.flatCoordinates_, this.flatCoordinates_, this.stride_);\n }\n\n /**\n * @return {RenderFeature} A cloned render feature.\n */\n clone() {\n return new RenderFeature(\n this.type_,\n this.flatCoordinates_.slice(),\n this.ends_?.slice(),\n this.stride_,\n Object.assign({}, this.properties_),\n this.id_,\n );\n }\n\n /**\n * @return {Array|null} Ends.\n */\n getEnds() {\n return this.ends_;\n }\n\n /**\n * Add transform and resolution based geometry simplification to this instance.\n * @return {RenderFeature} This render feature.\n */\n enableSimplifyTransformed() {\n this.simplifyTransformed = memoizeOne((squaredTolerance, transform) => {\n if (squaredTolerance === this.squaredTolerance_) {\n return this.simplifiedGeometry_;\n }\n this.simplifiedGeometry_ = this.clone();\n if (transform) {\n this.simplifiedGeometry_.applyTransform(transform);\n }\n const simplifiedFlatCoordinates =\n this.simplifiedGeometry_.getFlatCoordinates();\n let simplifiedEnds;\n switch (this.type_) {\n case 'LineString':\n simplifiedFlatCoordinates.length = douglasPeucker(\n simplifiedFlatCoordinates,\n 0,\n this.simplifiedGeometry_.flatCoordinates_.length,\n this.simplifiedGeometry_.stride_,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n simplifiedEnds = [simplifiedFlatCoordinates.length];\n break;\n case 'MultiLineString':\n simplifiedEnds = [];\n simplifiedFlatCoordinates.length = douglasPeuckerArray(\n simplifiedFlatCoordinates,\n 0,\n this.simplifiedGeometry_.ends_,\n this.simplifiedGeometry_.stride_,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds,\n );\n break;\n case 'Polygon':\n simplifiedEnds = [];\n simplifiedFlatCoordinates.length = quantizeArray(\n simplifiedFlatCoordinates,\n 0,\n this.simplifiedGeometry_.ends_,\n this.simplifiedGeometry_.stride_,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds,\n );\n break;\n default:\n }\n if (simplifiedEnds) {\n this.simplifiedGeometry_ = new RenderFeature(\n this.type_,\n simplifiedFlatCoordinates,\n simplifiedEnds,\n this.stride_,\n this.properties_,\n this.id_,\n );\n }\n this.squaredTolerance_ = squaredTolerance;\n return this.simplifiedGeometry_;\n });\n return this;\n }\n}\n\n/**\n * @return {Array} Flat coordinates.\n */\nRenderFeature.prototype.getFlatCoordinates =\n RenderFeature.prototype.getOrientedFlatCoordinates;\n\n/**\n * Create a geometry from an `ol/render/Feature`\n * @param {RenderFeature} renderFeature\n * Render Feature\n * @return {Point|MultiPoint|LineString|MultiLineString|Polygon|MultiPolygon}\n * New geometry instance.\n * @api\n */\nexport function toGeometry(renderFeature) {\n const geometryType = renderFeature.getType();\n switch (geometryType) {\n case 'Point':\n return new Point(renderFeature.getFlatCoordinates());\n case 'MultiPoint':\n return new MultiPoint(renderFeature.getFlatCoordinates(), 'XY');\n case 'LineString':\n return new LineString(renderFeature.getFlatCoordinates(), 'XY');\n case 'MultiLineString':\n return new MultiLineString(\n renderFeature.getFlatCoordinates(),\n 'XY',\n /** @type {Array} */ (renderFeature.getEnds()),\n );\n case 'Polygon':\n const flatCoordinates = renderFeature.getFlatCoordinates();\n const ends = renderFeature.getEnds();\n const endss = inflateEnds(flatCoordinates, ends);\n return endss.length > 1\n ? new MultiPolygon(flatCoordinates, 'XY', endss)\n : new Polygon(flatCoordinates, 'XY', ends);\n default:\n throw new Error('Invalid geometry type:' + geometryType);\n }\n}\n\n/**\n * Create an `ol/Feature` from an `ol/render/Feature`\n * @param {RenderFeature} renderFeature RenderFeature\n * @param {string} [geometryName] Geometry name to use\n * when creating the Feature.\n * @return {Feature} Newly constructed `ol/Feature` with properties,\n * geometry, and id copied over.\n * @api\n */\nexport function toFeature(renderFeature, geometryName) {\n const id = renderFeature.getId();\n const geometry = toGeometry(renderFeature);\n const properties = renderFeature.getProperties();\n const feature = new Feature();\n if (geometryName !== undefined) {\n feature.setGeometryName(geometryName);\n }\n feature.setGeometry(geometry);\n if (id !== undefined) {\n feature.setId(id);\n }\n feature.setProperties(properties, true);\n return feature;\n}\n\nexport default RenderFeature;\n","\n/**\n * Rearranges items so that all items in the [left, k] are the smallest.\n * The k-th element will have the (k - left + 1)-th smallest value in [left, right].\n *\n * @template T\n * @param {T[]} arr the array to partially sort (in place)\n * @param {number} k middle index for partial sorting (as defined above)\n * @param {number} [left=0] left index of the range to sort\n * @param {number} [right=arr.length-1] right index\n * @param {(a: T, b: T) => number} [compare = (a, b) => a - b] compare function\n */\nexport default function quickselect(arr, k, left = 0, right = arr.length - 1, compare = defaultCompare) {\n\n while (right > left) {\n if (right - left > 600) {\n const n = right - left + 1;\n const m = k - left + 1;\n const z = Math.log(n);\n const s = 0.5 * Math.exp(2 * z / 3);\n const sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n const newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n const newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n quickselect(arr, k, newLeft, newRight, compare);\n }\n\n const t = arr[k];\n let i = left;\n /** @type {number} */\n let j = right;\n\n swap(arr, left, k);\n if (compare(arr[right], t) > 0) swap(arr, left, right);\n\n while (i < j) {\n swap(arr, i, j);\n i++;\n j--;\n while (compare(arr[i], t) < 0) i++;\n while (compare(arr[j], t) > 0) j--;\n }\n\n if (compare(arr[left], t) === 0) swap(arr, left, j);\n else {\n j++;\n swap(arr, j, right);\n }\n\n if (j <= k) left = j + 1;\n if (k <= j) right = j - 1;\n }\n}\n\n/**\n * @template T\n * @param {T[]} arr\n * @param {number} i\n * @param {number} j\n */\nfunction swap(arr, i, j) {\n const tmp = arr[i];\n arr[i] = arr[j];\n arr[j] = tmp;\n}\n\n/**\n * @template T\n * @param {T} a\n * @param {T} b\n * @returns {number}\n */\nfunction defaultCompare(a, b) {\n return a < b ? -1 : a > b ? 1 : 0;\n}\n","import quickselect from 'quickselect';\n\nexport default class RBush {\n constructor(maxEntries = 9) {\n // max entries in a node is 9 by default; min node fill is 40% for best performance\n this._maxEntries = Math.max(4, maxEntries);\n this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));\n this.clear();\n }\n\n all() {\n return this._all(this.data, []);\n }\n\n search(bbox) {\n let node = this.data;\n const result = [];\n\n if (!intersects(bbox, node)) return result;\n\n const toBBox = this.toBBox;\n const nodesToSearch = [];\n\n while (node) {\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const childBBox = node.leaf ? toBBox(child) : child;\n\n if (intersects(bbox, childBBox)) {\n if (node.leaf) result.push(child);\n else if (contains(bbox, childBBox)) this._all(child, result);\n else nodesToSearch.push(child);\n }\n }\n node = nodesToSearch.pop();\n }\n\n return result;\n }\n\n collides(bbox) {\n let node = this.data;\n\n if (!intersects(bbox, node)) return false;\n\n const nodesToSearch = [];\n while (node) {\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const childBBox = node.leaf ? this.toBBox(child) : child;\n\n if (intersects(bbox, childBBox)) {\n if (node.leaf || contains(bbox, childBBox)) return true;\n nodesToSearch.push(child);\n }\n }\n node = nodesToSearch.pop();\n }\n\n return false;\n }\n\n load(data) {\n if (!(data && data.length)) return this;\n\n if (data.length < this._minEntries) {\n for (let i = 0; i < data.length; i++) {\n this.insert(data[i]);\n }\n return this;\n }\n\n // recursively build the tree with the given data from scratch using OMT algorithm\n let node = this._build(data.slice(), 0, data.length - 1, 0);\n\n if (!this.data.children.length) {\n // save as is if tree is empty\n this.data = node;\n\n } else if (this.data.height === node.height) {\n // split root if trees have the same height\n this._splitRoot(this.data, node);\n\n } else {\n if (this.data.height < node.height) {\n // swap trees if inserted one is bigger\n const tmpNode = this.data;\n this.data = node;\n node = tmpNode;\n }\n\n // insert the small tree into the large tree at appropriate level\n this._insert(node, this.data.height - node.height - 1, true);\n }\n\n return this;\n }\n\n insert(item) {\n if (item) this._insert(item, this.data.height - 1);\n return this;\n }\n\n clear() {\n this.data = createNode([]);\n return this;\n }\n\n remove(item, equalsFn) {\n if (!item) return this;\n\n let node = this.data;\n const bbox = this.toBBox(item);\n const path = [];\n const indexes = [];\n let i, parent, goingUp;\n\n // depth-first iterative tree traversal\n while (node || path.length) {\n\n if (!node) { // go up\n node = path.pop();\n parent = path[path.length - 1];\n i = indexes.pop();\n goingUp = true;\n }\n\n if (node.leaf) { // check current node\n const index = findItem(item, node.children, equalsFn);\n\n if (index !== -1) {\n // item found, remove the item and condense tree upwards\n node.children.splice(index, 1);\n path.push(node);\n this._condense(path);\n return this;\n }\n }\n\n if (!goingUp && !node.leaf && contains(node, bbox)) { // go down\n path.push(node);\n indexes.push(i);\n i = 0;\n parent = node;\n node = node.children[0];\n\n } else if (parent) { // go right\n i++;\n node = parent.children[i];\n goingUp = false;\n\n } else node = null; // nothing found\n }\n\n return this;\n }\n\n toBBox(item) { return item; }\n\n compareMinX(a, b) { return a.minX - b.minX; }\n compareMinY(a, b) { return a.minY - b.minY; }\n\n toJSON() { return this.data; }\n\n fromJSON(data) {\n this.data = data;\n return this;\n }\n\n _all(node, result) {\n const nodesToSearch = [];\n while (node) {\n if (node.leaf) result.push(...node.children);\n else nodesToSearch.push(...node.children);\n\n node = nodesToSearch.pop();\n }\n return result;\n }\n\n _build(items, left, right, height) {\n\n const N = right - left + 1;\n let M = this._maxEntries;\n let node;\n\n if (N <= M) {\n // reached leaf level; return leaf\n node = createNode(items.slice(left, right + 1));\n calcBBox(node, this.toBBox);\n return node;\n }\n\n if (!height) {\n // target height of the bulk-loaded tree\n height = Math.ceil(Math.log(N) / Math.log(M));\n\n // target number of root entries to maximize storage utilization\n M = Math.ceil(N / Math.pow(M, height - 1));\n }\n\n node = createNode([]);\n node.leaf = false;\n node.height = height;\n\n // split the items into M mostly square tiles\n\n const N2 = Math.ceil(N / M);\n const N1 = N2 * Math.ceil(Math.sqrt(M));\n\n multiSelect(items, left, right, N1, this.compareMinX);\n\n for (let i = left; i <= right; i += N1) {\n\n const right2 = Math.min(i + N1 - 1, right);\n\n multiSelect(items, i, right2, N2, this.compareMinY);\n\n for (let j = i; j <= right2; j += N2) {\n\n const right3 = Math.min(j + N2 - 1, right2);\n\n // pack each entry recursively\n node.children.push(this._build(items, j, right3, height - 1));\n }\n }\n\n calcBBox(node, this.toBBox);\n\n return node;\n }\n\n _chooseSubtree(bbox, node, level, path) {\n while (true) {\n path.push(node);\n\n if (node.leaf || path.length - 1 === level) break;\n\n let minArea = Infinity;\n let minEnlargement = Infinity;\n let targetNode;\n\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const area = bboxArea(child);\n const enlargement = enlargedArea(bbox, child) - area;\n\n // choose entry with the least area enlargement\n if (enlargement < minEnlargement) {\n minEnlargement = enlargement;\n minArea = area < minArea ? area : minArea;\n targetNode = child;\n\n } else if (enlargement === minEnlargement) {\n // otherwise choose one with the smallest area\n if (area < minArea) {\n minArea = area;\n targetNode = child;\n }\n }\n }\n\n node = targetNode || node.children[0];\n }\n\n return node;\n }\n\n _insert(item, level, isNode) {\n const bbox = isNode ? item : this.toBBox(item);\n const insertPath = [];\n\n // find the best node for accommodating the item, saving all nodes along the path too\n const node = this._chooseSubtree(bbox, this.data, level, insertPath);\n\n // put the item into the node\n node.children.push(item);\n extend(node, bbox);\n\n // split on node overflow; propagate upwards if necessary\n while (level >= 0) {\n if (insertPath[level].children.length > this._maxEntries) {\n this._split(insertPath, level);\n level--;\n } else break;\n }\n\n // adjust bboxes along the insertion path\n this._adjustParentBBoxes(bbox, insertPath, level);\n }\n\n // split overflowed node into two\n _split(insertPath, level) {\n const node = insertPath[level];\n const M = node.children.length;\n const m = this._minEntries;\n\n this._chooseSplitAxis(node, m, M);\n\n const splitIndex = this._chooseSplitIndex(node, m, M);\n\n const newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));\n newNode.height = node.height;\n newNode.leaf = node.leaf;\n\n calcBBox(node, this.toBBox);\n calcBBox(newNode, this.toBBox);\n\n if (level) insertPath[level - 1].children.push(newNode);\n else this._splitRoot(node, newNode);\n }\n\n _splitRoot(node, newNode) {\n // split root node\n this.data = createNode([node, newNode]);\n this.data.height = node.height + 1;\n this.data.leaf = false;\n calcBBox(this.data, this.toBBox);\n }\n\n _chooseSplitIndex(node, m, M) {\n let index;\n let minOverlap = Infinity;\n let minArea = Infinity;\n\n for (let i = m; i <= M - m; i++) {\n const bbox1 = distBBox(node, 0, i, this.toBBox);\n const bbox2 = distBBox(node, i, M, this.toBBox);\n\n const overlap = intersectionArea(bbox1, bbox2);\n const area = bboxArea(bbox1) + bboxArea(bbox2);\n\n // choose distribution with minimum overlap\n if (overlap < minOverlap) {\n minOverlap = overlap;\n index = i;\n\n minArea = area < minArea ? area : minArea;\n\n } else if (overlap === minOverlap) {\n // otherwise choose distribution with minimum area\n if (area < minArea) {\n minArea = area;\n index = i;\n }\n }\n }\n\n return index || M - m;\n }\n\n // sorts node children by the best axis for split\n _chooseSplitAxis(node, m, M) {\n const compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;\n const compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;\n const xMargin = this._allDistMargin(node, m, M, compareMinX);\n const yMargin = this._allDistMargin(node, m, M, compareMinY);\n\n // if total distributions margin value is minimal for x, sort by minX,\n // otherwise it's already sorted by minY\n if (xMargin < yMargin) node.children.sort(compareMinX);\n }\n\n // total margin of all possible split distributions where each node is at least m full\n _allDistMargin(node, m, M, compare) {\n node.children.sort(compare);\n\n const toBBox = this.toBBox;\n const leftBBox = distBBox(node, 0, m, toBBox);\n const rightBBox = distBBox(node, M - m, M, toBBox);\n let margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);\n\n for (let i = m; i < M - m; i++) {\n const child = node.children[i];\n extend(leftBBox, node.leaf ? toBBox(child) : child);\n margin += bboxMargin(leftBBox);\n }\n\n for (let i = M - m - 1; i >= m; i--) {\n const child = node.children[i];\n extend(rightBBox, node.leaf ? toBBox(child) : child);\n margin += bboxMargin(rightBBox);\n }\n\n return margin;\n }\n\n _adjustParentBBoxes(bbox, path, level) {\n // adjust bboxes along the given tree path\n for (let i = level; i >= 0; i--) {\n extend(path[i], bbox);\n }\n }\n\n _condense(path) {\n // go through the path, removing empty nodes and updating bboxes\n for (let i = path.length - 1, siblings; i >= 0; i--) {\n if (path[i].children.length === 0) {\n if (i > 0) {\n siblings = path[i - 1].children;\n siblings.splice(siblings.indexOf(path[i]), 1);\n\n } else this.clear();\n\n } else calcBBox(path[i], this.toBBox);\n }\n }\n}\n\nfunction findItem(item, items, equalsFn) {\n if (!equalsFn) return items.indexOf(item);\n\n for (let i = 0; i < items.length; i++) {\n if (equalsFn(item, items[i])) return i;\n }\n return -1;\n}\n\n// calculate node's bbox from bboxes of its children\nfunction calcBBox(node, toBBox) {\n distBBox(node, 0, node.children.length, toBBox, node);\n}\n\n// min bounding rectangle of node children from k to p-1\nfunction distBBox(node, k, p, toBBox, destNode) {\n if (!destNode) destNode = createNode(null);\n destNode.minX = Infinity;\n destNode.minY = Infinity;\n destNode.maxX = -Infinity;\n destNode.maxY = -Infinity;\n\n for (let i = k; i < p; i++) {\n const child = node.children[i];\n extend(destNode, node.leaf ? toBBox(child) : child);\n }\n\n return destNode;\n}\n\nfunction extend(a, b) {\n a.minX = Math.min(a.minX, b.minX);\n a.minY = Math.min(a.minY, b.minY);\n a.maxX = Math.max(a.maxX, b.maxX);\n a.maxY = Math.max(a.maxY, b.maxY);\n return a;\n}\n\nfunction compareNodeMinX(a, b) { return a.minX - b.minX; }\nfunction compareNodeMinY(a, b) { return a.minY - b.minY; }\n\nfunction bboxArea(a) { return (a.maxX - a.minX) * (a.maxY - a.minY); }\nfunction bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }\n\nfunction enlargedArea(a, b) {\n return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *\n (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));\n}\n\nfunction intersectionArea(a, b) {\n const minX = Math.max(a.minX, b.minX);\n const minY = Math.max(a.minY, b.minY);\n const maxX = Math.min(a.maxX, b.maxX);\n const maxY = Math.min(a.maxY, b.maxY);\n\n return Math.max(0, maxX - minX) *\n Math.max(0, maxY - minY);\n}\n\nfunction contains(a, b) {\n return a.minX <= b.minX &&\n a.minY <= b.minY &&\n b.maxX <= a.maxX &&\n b.maxY <= a.maxY;\n}\n\nfunction intersects(a, b) {\n return b.minX <= a.maxX &&\n b.minY <= a.maxY &&\n b.maxX >= a.minX &&\n b.maxY >= a.minY;\n}\n\nfunction createNode(children) {\n return {\n children,\n height: 1,\n leaf: true,\n minX: Infinity,\n minY: Infinity,\n maxX: -Infinity,\n maxY: -Infinity\n };\n}\n\n// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;\n// combines selection algorithm with binary divide & conquer approach\n\nfunction multiSelect(arr, left, right, n, compare) {\n const stack = [left, right];\n\n while (stack.length) {\n right = stack.pop();\n left = stack.pop();\n\n if (right - left <= n) continue;\n\n const mid = left + Math.ceil((right - left) / n / 2) * n;\n quickselect(arr, mid, left, right, compare);\n\n stack.push(left, mid, mid, right);\n }\n}\n","/**\n * @module ol/structs/RBush\n */\nimport RBush_ from 'rbush';\nimport {createOrUpdate, equals} from '../extent.js';\nimport {isEmpty} from '../obj.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {import(\"rbush\").BBox & {value: T}} Entry\n * @template T\n */\n\n/**\n * @classdesc\n * Wrapper around the RBush by Vladimir Agafonkin.\n * See https://github.com/mourner/rbush.\n *\n * @template {Object} T\n */\nclass RBush {\n /**\n * @param {number} [maxEntries] Max entries.\n */\n constructor(maxEntries) {\n /**\n * @private\n * @type {RBush_>}\n */\n this.rbush_ = new RBush_(maxEntries);\n\n /**\n * A mapping between the objects added to this rbush wrapper\n * and the objects that are actually added to the internal rbush.\n * @private\n * @type {Object>}\n */\n this.items_ = {};\n }\n\n /**\n * Insert a value into the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\n insert(extent, value) {\n /** @type {Entry} */\n const item = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n value: value,\n };\n\n this.rbush_.insert(item);\n this.items_[getUid(value)] = item;\n }\n\n /**\n * Bulk-insert values into the RBush.\n * @param {Array} extents Extents.\n * @param {Array} values Values.\n */\n load(extents, values) {\n const items = new Array(values.length);\n for (let i = 0, l = values.length; i < l; i++) {\n const extent = extents[i];\n const value = values[i];\n\n /** @type {Entry} */\n const item = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n value: value,\n };\n items[i] = item;\n this.items_[getUid(value)] = item;\n }\n this.rbush_.load(items);\n }\n\n /**\n * Remove a value from the RBush.\n * @param {T} value Value.\n * @return {boolean} Removed.\n */\n remove(value) {\n const uid = getUid(value);\n\n // get the object in which the value was wrapped when adding to the\n // internal rbush. then use that object to do the removal.\n const item = this.items_[uid];\n delete this.items_[uid];\n return this.rbush_.remove(item) !== null;\n }\n\n /**\n * Update the extent of a value in the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\n update(extent, value) {\n const item = this.items_[getUid(value)];\n const bbox = [item.minX, item.minY, item.maxX, item.maxY];\n if (!equals(bbox, extent)) {\n this.remove(value);\n this.insert(extent, value);\n }\n }\n\n /**\n * Return all values in the RBush.\n * @return {Array} All.\n */\n getAll() {\n const items = this.rbush_.all();\n return items.map(function (item) {\n return item.value;\n });\n }\n\n /**\n * Return all values in the given extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {Array} All in extent.\n */\n getInExtent(extent) {\n /** @type {import(\"rbush\").BBox} */\n const bbox = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n };\n const items = this.rbush_.search(bbox);\n return items.map(function (item) {\n return item.value;\n });\n }\n\n /**\n * Calls a callback function with each value in the tree.\n * If the callback returns a truthy value, this value is returned without\n * checking the rest of the tree.\n * @param {function(T): R} callback Callback.\n * @return {R|undefined} Callback return value.\n * @template R\n */\n forEach(callback) {\n return this.forEach_(this.getAll(), callback);\n }\n\n /**\n * Calls a callback function with each value in the provided extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(T): R} callback Callback.\n * @return {R|undefined} Callback return value.\n * @template R\n */\n forEachInExtent(extent, callback) {\n return this.forEach_(this.getInExtent(extent), callback);\n }\n\n /**\n * @param {Array} values Values.\n * @param {function(T): R} callback Callback.\n * @return {R|undefined} Callback return value.\n * @template R\n * @private\n */\n forEach_(values, callback) {\n let result;\n for (let i = 0, l = values.length; i < l; i++) {\n result = callback(values[i]);\n if (result) {\n return result;\n }\n }\n return result;\n }\n\n /**\n * @return {boolean} Is empty.\n */\n isEmpty() {\n return isEmpty(this.items_);\n }\n\n /**\n * Remove all values from the RBush.\n */\n clear() {\n this.rbush_.clear();\n this.items_ = {};\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} [extent] Extent.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\n getExtent(extent) {\n const data = this.rbush_.toJSON();\n return createOrUpdate(data.minX, data.minY, data.maxX, data.maxY, extent);\n }\n\n /**\n * @param {RBush} rbush R-Tree.\n */\n concat(rbush) {\n this.rbush_.load(rbush.rbush_.all());\n for (const i in rbush.items_) {\n this.items_[i] = rbush.items_[i];\n }\n }\n}\n\nexport default RBush;\n","/**\n * @module ol/source/Source\n */\nimport BaseObject from '../Object.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * @typedef {'undefined' | 'loading' | 'ready' | 'error'} State\n * State of the source, one of 'undefined', 'loading', 'ready' or 'error'.\n */\n\n/**\n * A function that takes a {@link import(\"../View.js\").ViewStateLayerStateExtent} and returns a string or\n * an array of strings representing source attributions.\n *\n * @typedef {function(import(\"../View.js\").ViewStateLayerStateExtent): (string|Array)} Attribution\n */\n\n/**\n * A type that can be used to provide attribution information for data sources.\n *\n * It represents either\n * a simple string (e.g. `'© Acme Inc.'`)\n * an array of simple strings (e.g. `['© Acme Inc.', '© Bacme Inc.']`)\n * a function that returns a string or array of strings ({@link module:ol/source/Source~Attribution})\n *\n * @typedef {string|Array|Attribution} AttributionLike\n */\n\n/**\n * @typedef {Object} Options\n * @property {AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {import(\"./Source.js\").State} [state='ready'] State.\n * @property {boolean} [wrapX=false] WrapX.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for {@link module:ol/layer/Layer~Layer} sources.\n *\n * A generic `change` event is triggered when the state of the source changes.\n * @abstract\n * @api\n */\nclass Source extends BaseObject {\n /**\n * @param {Options} options Source options.\n */\n constructor(options) {\n super();\n\n /**\n * @protected\n * @type {import(\"../proj/Projection.js\").default|null}\n */\n this.projection = getProjection(options.projection);\n\n /**\n * @private\n * @type {?Attribution}\n */\n this.attributions_ = adaptAttributions(options.attributions);\n\n /**\n * @private\n * @type {boolean}\n */\n this.attributionsCollapsible_ = options.attributionsCollapsible ?? true;\n\n /**\n * This source is currently loading data. Sources that defer loading to the\n * map's tile queue never set this to a `truthy` value.\n * @type {boolean|number}\n */\n this.loading = false;\n\n /**\n * @private\n * @type {import(\"./Source.js\").State}\n */\n this.state_ = options.state !== undefined ? options.state : 'ready';\n\n /**\n * @private\n * @type {boolean}\n */\n this.wrapX_ = options.wrapX !== undefined ? options.wrapX : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.interpolate_ = !!options.interpolate;\n\n /**\n * @protected\n * @type {function(import(\"../View.js\").ViewOptions):void}\n */\n this.viewResolver = null;\n\n /**\n * @protected\n * @type {function(Error):void}\n */\n this.viewRejector = null;\n\n const self = this;\n /**\n * @private\n * @type {Promise}\n */\n this.viewPromise_ = new Promise(function (resolve, reject) {\n self.viewResolver = resolve;\n self.viewRejector = reject;\n });\n }\n\n /**\n * Get the attribution function for the source.\n * @return {?Attribution} Attribution function.\n * @api\n */\n getAttributions() {\n return this.attributions_;\n }\n\n /**\n * @return {boolean} Attributions are collapsible.\n * @api\n */\n getAttributionsCollapsible() {\n return this.attributionsCollapsible_;\n }\n\n /**\n * Get the projection of the source.\n * @return {import(\"../proj/Projection.js\").default|null} Projection.\n * @api\n */\n getProjection() {\n return this.projection;\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} [projection] Projection.\n * @return {Array|null} Resolutions.\n */\n getResolutions(projection) {\n return null;\n }\n\n /**\n * @return {Promise} A promise for view-related properties.\n */\n getView() {\n return this.viewPromise_;\n }\n\n /**\n * Resolve once the source is ready to be used (its state is `ready`), or\n * reject if it fails to load (its state is `error`). Sources that configure\n * asynchronously can use this to expose data (e.g. dimensions) through a\n * promise instead of the `change` event.\n * @return {Promise} Resolves when the source is ready.\n * @protected\n */\n ready() {\n const state = this.getState();\n if (state === 'ready') {\n return Promise.resolve();\n }\n if (state === 'error') {\n return Promise.reject(new Error('Source failed to load'));\n }\n return new Promise((resolve, reject) => {\n const onChange = () => {\n const changedState = this.getState();\n if (changedState === 'ready') {\n this.un('change', onChange);\n resolve();\n } else if (changedState === 'error') {\n this.un('change', onChange);\n reject(new Error('Source failed to load'));\n }\n };\n this.on('change', onChange);\n });\n }\n\n /**\n * Get the state of the source, see {@link import(\"./Source.js\").State} for possible states.\n * @return {import(\"./Source.js\").State} State.\n * @api\n */\n getState() {\n return this.state_;\n }\n\n /**\n * @return {boolean|undefined} Wrap X.\n */\n getWrapX() {\n return this.wrapX_;\n }\n\n /**\n * @return {boolean} Use linear interpolation when resampling.\n */\n getInterpolate() {\n return this.interpolate_;\n }\n\n /**\n * Refreshes the source. The source will be cleared, and data from the server will be reloaded.\n * @api\n */\n refresh() {\n this.changed();\n }\n\n /**\n * Set the attributions of the source.\n * @param {AttributionLike|undefined} attributions Attributions.\n * Can be passed as `string`, `Array`, {@link module:ol/source/Source~Attribution},\n * or `undefined`.\n * @api\n */\n setAttributions(attributions) {\n this.attributions_ = adaptAttributions(attributions);\n this.changed();\n }\n\n /**\n * Set the state of the source.\n * @param {import(\"./Source.js\").State} state State.\n */\n setState(state) {\n this.state_ = state;\n this.changed();\n }\n}\n\n/**\n * Turns the attributions option into an attributions function.\n * @param {AttributionLike|undefined} attributionLike The attribution option.\n * @return {Attribution|null} An attribution function (or null).\n */\nfunction adaptAttributions(attributionLike) {\n if (!attributionLike) {\n return null;\n }\n if (typeof attributionLike === 'function') {\n return attributionLike;\n }\n if (!Array.isArray(attributionLike)) {\n attributionLike = [attributionLike];\n }\n return (frameState) => attributionLike;\n}\n\nexport default Source;\n","/**\n * @module ol/source/VectorEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a feature is added to the source.\n * @event module:ol/source/Vector.VectorSourceEvent#addfeature\n * @api\n */\n ADDFEATURE: 'addfeature',\n\n /**\n * Triggered when a feature is updated.\n * @event module:ol/source/Vector.VectorSourceEvent#changefeature\n * @api\n */\n CHANGEFEATURE: 'changefeature',\n\n /**\n * Triggered when the clear method is called on the source.\n * @event module:ol/source/Vector.VectorSourceEvent#clear\n * @api\n */\n CLEAR: 'clear',\n\n /**\n * Triggered when a feature is removed from the source.\n * See {@link module:ol/source/Vector~VectorSource#clear source.clear()} for exceptions.\n * @event module:ol/source/Vector.VectorSourceEvent#removefeature\n * @api\n */\n REMOVEFEATURE: 'removefeature',\n\n /**\n * Triggered when features starts loading.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloadstart\n * @api\n */\n FEATURESLOADSTART: 'featuresloadstart',\n\n /**\n * Triggered when features finishes loading.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloadend\n * @api\n */\n FEATURESLOADEND: 'featuresloadend',\n\n /**\n * Triggered if feature loading results in an error.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloaderror\n * @api\n */\n FEATURESLOADERROR: 'featuresloaderror',\n};\n\n/**\n * @typedef {'addfeature'|'changefeature'|'clear'|'removefeature'|'featuresloadstart'|'featuresloadend'|'featuresloaderror'} VectorSourceEventTypes\n */\n","/**\n * @module ol/source/Vector\n */\n\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {extend} from '../array.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, getDifference, wrapAndSliceX} from '../extent.js';\nimport {xhr} from '../featureloader.js';\nimport {TRUE, VOID} from '../functions.js';\nimport {all as allStrategy} from '../loadingstrategy.js';\nimport {isEmpty} from '../obj.js';\nimport RenderFeature from '../render/Feature.js';\nimport RBush from '../structs/RBush.js';\nimport {getUid} from '../util.js';\nimport Source from './Source.js';\nimport VectorEventType from './VectorEventType.js';\n\n/**\n * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and\n * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this\n * is one of the standard {@link module:ol/loadingstrategy} strategies.\n *\n * @typedef {function(import(\"../extent.js\").Extent, number, import(\"../proj/Projection.js\").default): Array} LoadingStrategy\n * @api\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Vector~VectorSource} instances are instances of this\n * type.\n * @template {import(\"../Feature.js\").FeatureLike} [FeatureType=import(\"../Feature.js\").default]\n */\nexport class VectorSourceEvent extends Event {\n /**\n * @param {string} type Type.\n * @param {FeatureType} [feature] Feature.\n * @param {Array} [features] Features.\n */\n constructor(type, feature, features) {\n super(type);\n\n /**\n * The added or removed feature for the `ADDFEATURE` and `REMOVEFEATURE` events, `undefined` otherwise.\n * @type {FeatureType|undefined}\n * @api\n */\n this.feature = feature;\n\n /**\n * The loaded features for the `FEATURESLOADED` event, `undefined` otherwise.\n * @type {Array|undefined}\n * @api\n */\n this.features = features;\n }\n}\n\n/***\n * @template {import(\"../Feature.js\").FeatureLike} [T=import(\"../Feature.js\").default]\n * @typedef {T extends RenderFeature ? T|Array : T} FeatureClassOrArrayOfRenderFeatures\n */\n\n/***\n * @template Return\n * @template {import(\"../Feature.js\").FeatureLike} [FeatureType=import(\"../Feature.js\").default]\n * @typedef {import(\"../Observable.js\").OnSignature &\n * import(\"../Observable.js\").OnSignature &\n * import(\"../Observable.js\").OnSignature, Return> &\n * import(\"../Observable.js\").CombinedOnSignature} VectorSourceOnSignature\n */\n\n/**\n * @template {import(\"../Feature.js\").FeatureLike} [FeatureType=import(\"../Feature.js\").default]\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {Array|Collection} [features]\n * Features. If provided as {@link module:ol/Collection~Collection}, the features in the source\n * and the collection will stay in sync.\n * @property {import(\"../format/Feature.js\").default} [format] The feature format used by the XHR\n * feature loader when `url` is set. Required if `url` is set, otherwise ignored.\n * @property {import(\"../featureloader.js\").FeatureLoader} [loader]\n * The loader function used to load features, from a remote source for example.\n * If this is not set and `url` is set, the source will create and use an XHR\n * feature loader. The `'featuresloadend'` and `'featuresloaderror'` events\n * will only fire if the `success` and `failure` callbacks are used.\n *\n * Example:\n *\n * ```js\n * import Vector from 'ol/source/Vector.js';\n * import GeoJSON from 'ol/format/GeoJSON.js';\n * import {bbox} from 'ol/loadingstrategy.js';\n *\n * const vectorSource = new Vector({\n * loader: async (extent, resolution, projection) => {\n * const url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +\n * 'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +\n * 'outputFormat=application/json' +\n * 'bbox=' + extent.join(',') + ',' + projection.getCode();\n * const response = await fetch(url);\n * if (!response.ok) {\n * throw new Error('Network response was not ok');\n * }\n * const json = await response.json();\n * const features = new GeoJSON().readFeatures(json, {\n * featureProjection: projection,\n * });\n * return features;\n * },\n * strategy: bbox,\n * });\n * ```\n *\n * When you want to retry a failed request, use\n * ```js\n * vectorSource.removeLoadedExtent(extent);\n * vectorSource.changed();\n * ```\n *\n * @property {boolean} [overlaps=true] This source may have overlapping geometries.\n * Setting this to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {LoadingStrategy} [strategy] The loading strategy to use.\n * By default an {@link module:ol/loadingstrategy.all}\n * strategy is used, a one-off strategy which loads all features at once.\n * @property {string|import(\"../featureloader.js\").FeatureUrlFunction} [url]\n * Setting this option instructs the source to load features using an XHR loader\n * (see {@link module:ol/featureloader.xhr}). Use a `string` and an\n * {@link module:ol/loadingstrategy.all} for a one-off download of all features from\n * the given URL. Use a {@link module:ol/featureloader~FeatureUrlFunction} to generate the url with\n * other loading strategies.\n * Requires `format` to be set as well.\n * When default XHR feature loader is provided, the features will\n * be transformed from the data projection to the view projection\n * during parsing. If your remote data source does not advertise its projection\n * properly, this transformation will be incorrect. For some formats, the\n * default projection (usually EPSG:4326) can be overridden by setting the\n * dataProjection constructor option on the format.\n * Note that if a source contains non-feature data, such as a GeoJSON geometry\n * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.\n * @property {boolean} [useSpatialIndex=true]\n * By default, an RTree is used as spatial index. When features are removed and\n * added frequently, and the total number of features is low, setting this to\n * `false` may improve performance.\n *\n * Note that\n * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},\n * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and\n * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is\n * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop\n * through all features.\n *\n * When set to `false`, the features will be maintained in an\n * {@link module:ol/Collection~Collection}, which can be retrieved through\n * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.\n * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the\n * -180° and 180° meridians to work properly, this should be set to `false`. The\n * resulting geometry coordinates will then exceed the world bounds.\n */\n\n/**\n * @classdesc\n * Provides a source of features for vector layers. Vector features provided\n * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for\n * vector data that is optimized for rendering.\n *\n * @fires VectorSourceEvent\n * @api\n * @template {import(\"../Feature.js\").FeatureLike} [FeatureType=import(\"../Feature.js\").default]\n */\nclass VectorSource extends Source {\n /**\n * @param {Options} [options] Vector source options.\n */\n constructor(options) {\n options = options || {};\n\n super({\n attributions: options.attributions,\n interpolate: true,\n projection: undefined,\n state: 'ready',\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n });\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.on;\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.once;\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {import(\"../featureloader.js\").FeatureLoader}\n */\n this.loader_ = VOID;\n\n /**\n * @private\n * @type {import(\"../format/Feature.js\").default|null}\n */\n this.format_ = options.format || null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.overlaps_ = options.overlaps === undefined ? true : options.overlaps;\n\n /**\n * @private\n * @type {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined}\n */\n this.url_ = options.url;\n\n if (options.loader !== undefined) {\n this.loader_ = options.loader;\n } else if (this.url_ !== undefined) {\n assert(this.format_, '`format` must be set when `url` is set');\n // create a XHR feature loader for \"url\" and \"format\"\n this.loader_ = xhr(this.url_, this.format_);\n }\n\n /**\n * @private\n * @type {LoadingStrategy}\n */\n this.strategy_ =\n options.strategy !== undefined ? options.strategy : allStrategy;\n\n const useSpatialIndex =\n options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;\n\n /**\n * @private\n * @type {RBush}\n */\n this.featuresRtree_ = useSpatialIndex ? new RBush() : null;\n\n /**\n * @private\n * @type {RBush<{extent: import(\"../extent.js\").Extent}>}\n */\n this.loadedExtentsRtree_ = new RBush();\n\n /**\n * @private\n * @type {!Object}\n */\n this.nullGeometryFeatures_ = {};\n\n /**\n * A lookup of features by id (the return from feature.getId()).\n * @private\n * @type {!Object>}\n */\n this.idIndex_ = {};\n\n /**\n * A lookup of features by uid (using getUid(feature)).\n * @private\n * @type {!Object}\n */\n this.uidIndex_ = {};\n\n /**\n * @private\n * @type {Object>}\n */\n this.featureChangeKeys_ = {};\n\n /**\n * @private\n * @type {Collection|null}\n */\n this.featuresCollection_ = null;\n\n /** @type {Collection} */\n let collection;\n /** @type {Array} */\n let features;\n if (Array.isArray(options.features)) {\n features = options.features;\n } else if (options.features) {\n collection = options.features;\n features = collection.getArray();\n }\n if (!useSpatialIndex && collection === undefined) {\n collection = new Collection(features);\n }\n if (features !== undefined) {\n this.addFeaturesInternal(features);\n }\n if (collection !== undefined) {\n this.bindFeaturesCollection_(collection);\n }\n }\n\n /**\n * Add a single feature to the source. If you want to add a batch of features\n * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}\n * instead. A feature will not be added to the source if feature with\n * the same id is already there. The reason for this behavior is to avoid\n * feature duplication when using bbox or tile loading strategies.\n * Note: this also applies if a {@link module:ol/Collection~Collection} is used for features,\n * meaning that if a feature with a duplicate id is added in the collection, it will\n * be removed from it right away.\n * @param {FeatureType} feature Feature to add.\n * @api\n */\n addFeature(feature) {\n this.addFeatureInternal(feature);\n this.changed();\n }\n\n /**\n * Add a feature without firing a `change` event.\n * @param {FeatureType} feature Feature.\n * @protected\n */\n addFeatureInternal(feature) {\n const featureKey = getUid(feature);\n\n if (!this.addToIndex_(featureKey, feature)) {\n if (this.featuresCollection_) {\n this.featuresCollection_.remove(feature);\n }\n return;\n }\n\n this.setupChangeEvents_(featureKey, feature);\n\n const geometry = feature.getGeometry();\n if (geometry) {\n const extent = geometry.getExtent();\n if (this.featuresRtree_) {\n this.featuresRtree_.insert(extent, feature);\n }\n } else {\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.ADDFEATURE, feature),\n );\n }\n\n /**\n * @param {string} featureKey Unique identifier for the feature.\n * @param {FeatureType} feature The feature.\n * @private\n */\n setupChangeEvents_(featureKey, feature) {\n if (feature instanceof RenderFeature) {\n return;\n }\n this.featureChangeKeys_[featureKey] = [\n listen(feature, EventType.CHANGE, this.handleFeatureChange_, this),\n listen(\n feature,\n ObjectEventType.PROPERTYCHANGE,\n this.handleFeatureChange_,\n this,\n ),\n ];\n }\n\n /**\n * @param {string} featureKey Unique identifier for the feature.\n * @param {FeatureType} feature The feature.\n * @return {boolean} The feature is \"valid\", in the sense that it is also a\n * candidate for insertion into the Rtree.\n * @private\n */\n addToIndex_(featureKey, feature) {\n let valid = true;\n if (feature.getId() !== undefined) {\n const id = String(feature.getId());\n if (!(id in this.idIndex_)) {\n this.idIndex_[id] = feature;\n } else if (feature instanceof RenderFeature) {\n const indexedFeature = this.idIndex_[id];\n if (!(indexedFeature instanceof RenderFeature)) {\n valid = false;\n } else if (!Array.isArray(indexedFeature)) {\n this.idIndex_[id] = [indexedFeature, feature];\n } else {\n indexedFeature.push(feature);\n }\n } else {\n valid = false;\n }\n }\n if (valid) {\n assert(\n !(featureKey in this.uidIndex_),\n 'The passed `feature` was already added to the source',\n );\n this.uidIndex_[featureKey] = feature;\n }\n return valid;\n }\n\n /**\n * Add a batch of features to the source.\n * @param {Array} features Features to add.\n * @api\n */\n addFeatures(features) {\n this.addFeaturesInternal(features);\n this.changed();\n }\n\n /**\n * Add features without firing a `change` event.\n * @param {Array} features Features.\n * @protected\n */\n addFeaturesInternal(features) {\n const extents = [];\n /** @type {Array} */\n const newFeatures = [];\n /** @type {Array} */\n const geometryFeatures = [];\n\n for (let i = 0, length = features.length; i < length; i++) {\n const feature = features[i];\n const featureKey = getUid(feature);\n if (this.addToIndex_(featureKey, feature)) {\n newFeatures.push(feature);\n }\n }\n\n for (let i = 0, length = newFeatures.length; i < length; i++) {\n const feature = newFeatures[i];\n const featureKey = getUid(feature);\n this.setupChangeEvents_(featureKey, feature);\n\n const geometry = feature.getGeometry();\n if (geometry) {\n const extent = geometry.getExtent();\n extents.push(extent);\n geometryFeatures.push(feature);\n } else {\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n }\n if (this.featuresRtree_) {\n this.featuresRtree_.load(extents, geometryFeatures);\n }\n\n if (this.hasListener(VectorEventType.ADDFEATURE)) {\n for (let i = 0, length = newFeatures.length; i < length; i++) {\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i]),\n );\n }\n }\n }\n\n /**\n * @param {!Collection} collection Collection.\n * @private\n */\n bindFeaturesCollection_(collection) {\n let modifyingCollection = false;\n this.addEventListener(\n VectorEventType.ADDFEATURE,\n /**\n * @param {VectorSourceEvent} evt The vector source event\n */\n function (evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n collection.push(evt.feature);\n modifyingCollection = false;\n }\n },\n );\n this.addEventListener(\n VectorEventType.REMOVEFEATURE,\n /**\n * @param {VectorSourceEvent} evt The vector source event\n */\n function (evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n collection.remove(evt.feature);\n modifyingCollection = false;\n }\n },\n );\n collection.addEventListener(\n CollectionEventType.ADD,\n /**\n * @param {import(\"../Collection.js\").CollectionEvent} evt The collection event\n */\n (evt) => {\n if (!modifyingCollection) {\n modifyingCollection = true;\n this.addFeature(evt.element);\n modifyingCollection = false;\n }\n },\n );\n collection.addEventListener(\n CollectionEventType.REMOVE,\n /**\n * @param {import(\"../Collection.js\").CollectionEvent} evt The collection event\n */\n (evt) => {\n if (!modifyingCollection) {\n modifyingCollection = true;\n this.removeFeature(evt.element);\n modifyingCollection = false;\n }\n },\n );\n this.featuresCollection_ = collection;\n }\n\n /**\n * Remove all features from the source.\n * @param {boolean} [fast] Skip dispatching of {@link module:ol/source/Vector.VectorSourceEvent#event:removefeature} events.\n * @api\n */\n clear(fast) {\n if (fast) {\n for (const featureId in this.featureChangeKeys_) {\n const keys = this.featureChangeKeys_[featureId];\n keys.forEach(unlistenByKey);\n }\n if (!this.featuresCollection_) {\n this.featureChangeKeys_ = {};\n this.idIndex_ = {};\n this.uidIndex_ = {};\n }\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.forEach((feature) => {\n this.removeFeatureInternal(feature);\n });\n for (const id in this.nullGeometryFeatures_) {\n this.removeFeatureInternal(this.nullGeometryFeatures_[id]);\n }\n }\n }\n if (this.featuresCollection_) {\n this.featuresCollection_.clear();\n }\n\n if (this.featuresRtree_) {\n this.featuresRtree_.clear();\n }\n this.nullGeometryFeatures_ = {};\n\n const clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);\n this.dispatchEvent(clearEvent);\n this.changed();\n }\n\n /**\n * Iterate through all features on the source, calling the provided callback\n * with each one. If the callback returns any \"truthy\" value, iteration will\n * stop and the function will return the same value.\n * Note: this function only iterate through the feature that have a defined geometry.\n *\n * @param {function(FeatureType): T} callback Called with each feature\n * on the source. Return a truthy value to stop iteration.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeature(callback) {\n if (this.featuresRtree_) {\n return this.featuresRtree_.forEach(callback);\n }\n if (this.featuresCollection_) {\n this.featuresCollection_.forEach(callback);\n }\n }\n\n /**\n * Iterate through all features whose geometries contain the provided\n * coordinate, calling the callback with each feature. If the callback returns\n * a \"truthy\" value, iteration will stop and the function will return the same\n * value.\n *\n * For {@link module:ol/render/Feature~RenderFeature} features, the callback will be\n * called for all features.\n *\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {function(FeatureType): T} callback Called with each feature\n * whose goemetry contains the provided coordinate.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n */\n forEachFeatureAtCoordinateDirect(coordinate, callback) {\n const extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];\n return this.forEachFeatureInExtent(extent, function (feature) {\n const geometry = feature.getGeometry();\n if (\n geometry instanceof RenderFeature ||\n geometry.intersectsCoordinate(coordinate)\n ) {\n return callback(feature);\n }\n return undefined;\n });\n }\n\n /**\n * Iterate through all features whose bounding box intersects the provided\n * extent (note that the feature's geometry may not intersect the extent),\n * calling the callback with each feature. If the callback returns a \"truthy\"\n * value, iteration will stop and the function will return the same value.\n *\n * If you are interested in features whose geometry intersects an extent, call\n * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.\n *\n * When `useSpatialIndex` is set to false, this method will loop through all\n * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(FeatureType): T} callback Called with each feature\n * whose bounding box intersects the provided extent.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeatureInExtent(extent, callback) {\n if (this.featuresRtree_) {\n return this.featuresRtree_.forEachInExtent(extent, callback);\n }\n if (this.featuresCollection_) {\n this.featuresCollection_.forEach(callback);\n }\n }\n\n /**\n * Iterate through all features whose geometry intersects the provided extent,\n * calling the callback with each feature. If the callback returns a \"truthy\"\n * value, iteration will stop and the function will return the same value.\n *\n * If you only want to test for bounding box intersection, call the\n * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(FeatureType): T} callback Called with each feature\n * whose geometry intersects the provided extent.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeatureIntersectingExtent(extent, callback) {\n return this.forEachFeatureInExtent(\n extent,\n /**\n * @param {FeatureType} feature Feature.\n * @return {T|undefined} The return value from the last call to the callback.\n */\n function (feature) {\n const geometry = feature.getGeometry();\n if (\n geometry instanceof RenderFeature ||\n geometry.intersectsExtent(extent)\n ) {\n const result = callback(feature);\n if (result) {\n return result;\n }\n }\n },\n );\n }\n\n /**\n * Get the features collection associated with this source. Will be `null`\n * unless the source was configured with `useSpatialIndex` set to `false`, or\n * with a {@link module:ol/Collection~Collection} as `features`.\n * @return {Collection|null} The collection of features.\n * @api\n */\n getFeaturesCollection() {\n return this.featuresCollection_;\n }\n\n /**\n * Get a snapshot of the features currently on the source in random order. The returned array\n * is a copy, the features are references to the features in the source.\n * @return {Array} Features.\n * @api\n */\n getFeatures() {\n let features;\n if (this.featuresCollection_) {\n features = this.featuresCollection_.getArray().slice(0);\n } else if (this.featuresRtree_) {\n features = this.featuresRtree_.getAll();\n if (!isEmpty(this.nullGeometryFeatures_)) {\n extend(features, Object.values(this.nullGeometryFeatures_));\n }\n }\n return features;\n }\n\n /**\n * Get all features whose geometry intersects the provided coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {Array} Features.\n * @api\n */\n getFeaturesAtCoordinate(coordinate) {\n /** @type {Array} */\n const features = [];\n this.forEachFeatureAtCoordinateDirect(coordinate, function (feature) {\n features.push(feature);\n });\n return features;\n }\n\n /**\n * Get all features whose bounding box intersects the provided extent. Note that this returns an array of\n * all features intersecting the given extent in random order (so it may include\n * features whose geometries do not intersect the extent).\n *\n * When `useSpatialIndex` is set to false, this method will return all\n * features.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {import(\"../proj/Projection.js\").default} [projection] Include features\n * where `extent` exceeds the x-axis bounds of `projection` and wraps around the world.\n * @return {Array} Features.\n * @api\n */\n getFeaturesInExtent(extent, projection) {\n if (this.featuresRtree_) {\n const multiWorld = projection && projection.canWrapX() && this.getWrapX();\n\n if (!multiWorld) {\n return this.featuresRtree_.getInExtent(extent);\n }\n\n const extents = wrapAndSliceX(extent, projection);\n\n return [].concat(\n ...extents.map((anExtent) => this.featuresRtree_.getInExtent(anExtent)),\n );\n }\n if (this.featuresCollection_) {\n return this.featuresCollection_.getArray().slice(0);\n }\n return [];\n }\n\n /**\n * Get the closest feature to the provided coordinate.\n *\n * This method is not available when the source is configured with\n * `useSpatialIndex` set to `false` and the features in this source are of type\n * {@link module:ol/Feature~Feature}.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {function(FeatureType):boolean} [filter] Feature filter function.\n * The filter function will receive one argument, the {@link module:ol/Feature~Feature feature}\n * and it should return a boolean value. By default, no filtering is made.\n * @return {FeatureType|null} Closest feature (or `null` if none found).\n * @api\n */\n getClosestFeatureToCoordinate(coordinate, filter) {\n // Find the closest feature using branch and bound. We start searching an\n // infinite extent, and find the distance from the first feature found. This\n // becomes the closest feature. We then compute a smaller extent which any\n // closer feature must intersect. We continue searching with this smaller\n // extent, trying to find a closer feature. Every time we find a closer\n // feature, we update the extent being searched so that any even closer\n // feature must intersect it. We continue until we run out of features.\n const x = coordinate[0];\n const y = coordinate[1];\n let closestFeature = null;\n const closestPoint = [NaN, NaN];\n let minSquaredDistance = Infinity;\n const extent = [-Infinity, -Infinity, Infinity, Infinity];\n filter = filter ? filter : TRUE;\n this.featuresRtree_.forEachInExtent(\n extent,\n /**\n * @param {FeatureType} feature Feature.\n */\n function (feature) {\n if (filter(feature)) {\n const geometry = feature.getGeometry();\n const previousMinSquaredDistance = minSquaredDistance;\n minSquaredDistance =\n geometry instanceof RenderFeature\n ? 0\n : geometry.closestPointXY(x, y, closestPoint, minSquaredDistance);\n if (minSquaredDistance < previousMinSquaredDistance) {\n closestFeature = feature;\n // This is sneaky. Reduce the extent that it is currently being\n // searched while the R-Tree traversal using this same extent object\n // is still in progress. This is safe because the new extent is\n // strictly contained by the old extent.\n const minDistance = Math.sqrt(minSquaredDistance);\n extent[0] = x - minDistance;\n extent[1] = y - minDistance;\n extent[2] = x + minDistance;\n extent[3] = y + minDistance;\n }\n }\n },\n );\n return closestFeature;\n }\n\n /**\n * Get the extent of the features currently in the source.\n *\n * This will return `null` when the source is configured with\n * `useSpatialIndex` set to `false`.\n * @param {import(\"../extent.js\").Extent} [extent] Destination extent. If provided, no new extent\n * will be created. Instead, that extent's coordinates will be overwritten.\n * @return {import(\"../extent.js\").Extent | null} Extent.\n * @api\n */\n getExtent(extent) {\n return this.featuresRtree_?.getExtent(extent) ?? null;\n }\n\n /**\n * Get a feature by its identifier (the value returned by feature.getId()). When `RenderFeature`s\n * are used, `getFeatureById()` can return an array of `RenderFeature`s. This allows for handling\n * of `GeometryCollection` geometries, where format readers create one `RenderFeature` per\n * `GeometryCollection` member.\n * Note that the index treats string and numeric identifiers as the same. So\n * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.\n *\n * @param {string|number} id Feature identifier.\n * @return {FeatureClassOrArrayOfRenderFeatures|null} The feature (or `null` if not found).\n * @api\n */\n getFeatureById(id) {\n const feature = this.idIndex_[id.toString()];\n return feature !== undefined\n ? /** @type {FeatureClassOrArrayOfRenderFeatures} */ (\n feature\n )\n : null;\n }\n\n /**\n * Get a feature by its internal unique identifier (using `getUid`).\n *\n * @param {string} uid Feature identifier.\n * @return {FeatureType|null} The feature (or `null` if not found).\n */\n getFeatureByUid(uid) {\n const feature = this.uidIndex_[uid];\n return feature !== undefined ? feature : null;\n }\n\n /**\n * Get the format associated with this source.\n *\n * @return {import(\"../format/Feature.js\").default|null}} The feature format.\n * @api\n */\n getFormat() {\n return this.format_;\n }\n\n /**\n * @return {boolean} The source can have overlapping geometries.\n */\n getOverlaps() {\n return this.overlaps_;\n }\n\n /**\n * Get the url associated with this source.\n *\n * @return {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined} The url.\n * @api\n */\n getUrl() {\n return this.url_;\n }\n\n /**\n * @param {Event} event Event.\n * @private\n */\n handleFeatureChange_(event) {\n const feature = /** @type {FeatureType} */ (event.target);\n const featureKey = getUid(feature);\n const geometry = feature.getGeometry();\n if (!geometry) {\n if (!(featureKey in this.nullGeometryFeatures_)) {\n if (this.featuresRtree_) {\n this.featuresRtree_.remove(feature);\n }\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n } else {\n const extent = geometry.getExtent();\n if (featureKey in this.nullGeometryFeatures_) {\n delete this.nullGeometryFeatures_[featureKey];\n if (this.featuresRtree_) {\n this.featuresRtree_.insert(extent, feature);\n }\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.update(extent, feature);\n }\n }\n }\n const id = feature.getId();\n if (id !== undefined) {\n const sid = id.toString();\n if (this.idIndex_[sid] !== feature) {\n this.removeFromIdIndex_(feature);\n this.idIndex_[sid] = feature;\n }\n } else {\n this.removeFromIdIndex_(feature);\n this.uidIndex_[featureKey] = feature;\n }\n this.changed();\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.CHANGEFEATURE, feature),\n );\n }\n\n /**\n * Returns true if the feature is contained within the source.\n * @param {FeatureType} feature Feature.\n * @return {boolean} Has feature.\n * @api\n */\n hasFeature(feature) {\n const id = feature.getId();\n if (id !== undefined) {\n const indexed = this.idIndex_[String(id)];\n if (Array.isArray(indexed)) {\n return indexed.includes(feature);\n }\n return indexed === feature;\n }\n return getUid(feature) in this.uidIndex_;\n }\n\n /**\n * @return {boolean} Is empty.\n */\n isEmpty() {\n if (this.featuresRtree_) {\n return (\n this.featuresRtree_.isEmpty() && isEmpty(this.nullGeometryFeatures_)\n );\n }\n if (this.featuresCollection_) {\n return this.featuresCollection_.getLength() === 0;\n }\n return true;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n */\n loadFeatures(extent, resolution, projection) {\n const loadedExtentsRtree = this.loadedExtentsRtree_;\n const extentsToLoad = this.strategy_(extent, resolution, projection);\n for (let i = 0, ii = extentsToLoad.length; i < ii; ++i) {\n const extentToLoad = extentsToLoad[i];\n const alreadyLoaded = loadedExtentsRtree.forEachInExtent(\n extentToLoad,\n /**\n * @param {{extent: import(\"../extent.js\").Extent}} object Object.\n * @return {boolean} Contains.\n */\n function (object) {\n return containsExtent(object.extent, extentToLoad);\n },\n );\n if (!alreadyLoaded) {\n this.loading = Number(this.loading) + 1;\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.FEATURESLOADSTART),\n );\n\n /**\n * @param {Array} features Loaded features\n */\n const success = (features) => {\n this.loading = Number(this.loading) - 1;\n this.dispatchEvent(\n new VectorSourceEvent(\n VectorEventType.FEATURESLOADEND,\n undefined,\n features,\n ),\n );\n };\n\n const failure = () => {\n this.changed();\n this.loading = Number(this.loading) - 1;\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.FEATURESLOADERROR),\n );\n };\n\n //TODO Remove this when the deprecatedsuccess and failure arguments are removed\n let disableCallbacks = false;\n\n const loaded = this.loader_.call(\n this,\n extentToLoad,\n resolution,\n projection,\n (features) => disableCallbacks || success(features),\n () => disableCallbacks || failure(),\n );\n if (loaded instanceof Promise) {\n //TODO Remove this when the deprecatedsuccess and failure arguments are removed\n disableCallbacks = true;\n loaded\n .then((features) => {\n this.addFeatures(features);\n success(features);\n })\n .catch(failure);\n } else if (this.loader_.length < 4) {\n this.loading = false;\n }\n loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});\n }\n }\n }\n\n /**\n * @override\n */\n refresh() {\n this.clear(true);\n this.loadedExtentsRtree_.clear();\n super.refresh();\n }\n\n /**\n * Marks an extent as not loaded, preserving any loaded areas outside it.\n *\n * Any previously loaded extent overlapping the given extent is split into its\n * remaining non-overlapping parts using {@link module:ol/extent~getDifference getDifference()},\n * which are then re-inserted into the tree.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent to mark as not loaded.\n * @api\n */\n removeLoadedExtent(extent) {\n const loadedExtentsRtree = this.loadedExtentsRtree_;\n const intersectingExtents = [];\n loadedExtentsRtree.forEachInExtent(extent, function (object) {\n intersectingExtents.push(object);\n });\n intersectingExtents.forEach((intersectingExtent) => {\n loadedExtentsRtree.remove(intersectingExtent);\n const remainders = getDifference(intersectingExtent.extent, extent);\n for (const remainder of remainders) {\n loadedExtentsRtree.insert(remainder, {extent: remainder});\n }\n });\n }\n\n /**\n * Batch remove features from the source. If you want to remove all features\n * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method\n * instead.\n * @param {Array} features Features to remove.\n * @api\n */\n removeFeatures(features) {\n let removed = false;\n for (let i = 0, ii = features.length; i < ii; ++i) {\n removed = this.removeFeatureInternal(features[i]) || removed;\n }\n if (removed) {\n this.changed();\n }\n }\n\n /**\n * Remove a single feature from the source. If you want to batch remove\n * features, use the {@link module:ol/source/Vector~VectorSource#removeFeatures #removeFeatures()} method\n * instead.\n * @param {FeatureType} feature Feature to remove.\n * @api\n */\n removeFeature(feature) {\n if (!feature) {\n return;\n }\n const removed = this.removeFeatureInternal(feature);\n if (removed) {\n this.changed();\n }\n }\n\n /**\n * Remove feature without firing a `change` event.\n * @param {FeatureType} feature Feature.\n * @return {boolean} True if the feature was removed, false if it was not found.\n * @protected\n */\n removeFeatureInternal(feature) {\n const featureKey = getUid(feature);\n if (!(featureKey in this.uidIndex_)) {\n return false;\n }\n\n if (featureKey in this.nullGeometryFeatures_) {\n delete this.nullGeometryFeatures_[featureKey];\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.remove(feature);\n }\n }\n\n const featureChangeKeys = this.featureChangeKeys_[featureKey];\n featureChangeKeys?.forEach(unlistenByKey);\n delete this.featureChangeKeys_[featureKey];\n\n const id = feature.getId();\n if (id !== undefined) {\n const idString = id.toString();\n const indexedFeature = this.idIndex_[idString];\n if (indexedFeature === feature) {\n delete this.idIndex_[idString];\n } else if (Array.isArray(indexedFeature)) {\n indexedFeature.splice(indexedFeature.indexOf(feature), 1);\n if (indexedFeature.length === 1) {\n this.idIndex_[idString] = indexedFeature[0];\n }\n }\n }\n delete this.uidIndex_[featureKey];\n if (this.hasListener(VectorEventType.REMOVEFEATURE)) {\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.REMOVEFEATURE, feature),\n );\n }\n return true;\n }\n\n /**\n * Remove a feature from the id index. Called internally when the feature id\n * may have changed.\n * @param {FeatureType} feature The feature.\n * @private\n */\n removeFromIdIndex_(feature) {\n for (const id in this.idIndex_) {\n if (this.idIndex_[id] === feature) {\n delete this.idIndex_[id];\n break;\n }\n }\n }\n\n /**\n * Set the new loader of the source. The next render cycle will use the\n * new loader.\n * @param {import(\"../featureloader.js\").FeatureLoader} loader The loader to set.\n * @api\n */\n setLoader(loader) {\n this.loader_ = loader;\n }\n\n /**\n * Points the source to a new url. The next render cycle will use the new url.\n * @param {string|import(\"../featureloader.js\").FeatureUrlFunction} url Url.\n * @api\n */\n setUrl(url) {\n assert(this.format_, '`format` must be set when `url` is set');\n this.url_ = url;\n this.setLoader(xhr(url, this.format_));\n }\n\n /**\n * @param {boolean} overlaps The source can have overlapping geometries.\n */\n setOverlaps(overlaps) {\n this.overlaps_ = overlaps;\n this.changed();\n }\n}\n\nexport default VectorSource;\n","/**\n * @module ol/style/Fill\n */\n\nimport ImageState from '../ImageState.js';\nimport {asArray} from '../color.js';\nimport {getUid} from '../util.js';\nimport {get as getIconImage} from './IconImage.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|import('../colorlike.js').PatternDescriptor|null} [color=null] A color,\n * gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats. For polygon fills (not for {@link import(\"./RegularShape.js\").default} fills),\n * a pattern can also be provided as {@link module:ol/colorlike~PatternDescriptor}.\n * Default null; if null, the Canvas/renderer default black will be used.\n */\n\n/**\n * @classdesc\n * Set fill style for vector features.\n * @api\n */\nclass Fill {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options || {};\n\n /**\n * @private\n * @type {import(\"./IconImage.js\").default|null}\n */\n this.patternImage_ = null;\n\n /**\n * @private\n * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|import('../colorlike.js').PatternDescriptor|null}\n */\n this.color_ = null;\n if (options.color !== undefined) {\n this.setColor(options.color);\n }\n }\n\n /**\n * Clones the style. The color is not cloned if it is a {@link module:ol/colorlike~ColorLike}.\n * @return {Fill} The cloned style.\n * @api\n */\n clone() {\n const color = this.getColor();\n return new Fill({\n color: Array.isArray(color) ? color.slice() : color || undefined,\n });\n }\n\n /**\n * Get the fill color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|import('../colorlike.js').PatternDescriptor|null} Color.\n * @api\n */\n getColor() {\n return this.color_;\n }\n\n /**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|import('../colorlike.js').PatternDescriptor|null} color Color.\n * @api\n */\n setColor(color) {\n if (color !== null && typeof color === 'object' && 'src' in color) {\n const patternImage = getIconImage(\n null,\n color.src,\n {crossOrigin: 'anonymous'},\n undefined,\n color.offset ? null : color.color ? color.color : null,\n !(color.offset && color.size),\n );\n patternImage.ready().then(() => {\n this.patternImage_ = null;\n });\n if (patternImage.getImageState() === ImageState.IDLE) {\n patternImage.load();\n }\n if (patternImage.getImageState() === ImageState.LOADING) {\n this.patternImage_ = patternImage;\n }\n }\n this.color_ = color;\n }\n\n /**\n * @return {string} Key of the fill for cache lookup.\n */\n getKey() {\n const fill = this.getColor();\n if (!fill) {\n return '';\n }\n return fill instanceof CanvasPattern || fill instanceof CanvasGradient\n ? getUid(fill)\n : typeof fill === 'object' && 'src' in fill\n ? fill.src + ':' + fill.offset\n : asArray(fill).toString();\n }\n\n /**\n * @return {boolean} The fill style is loading an image pattern.\n */\n loading() {\n return !!this.patternImage_;\n }\n\n /**\n * @return {Promise} `false` or a promise that resolves when the style is ready to use.\n */\n ready() {\n return this.patternImage_ ? this.patternImage_.ready() : Promise.resolve();\n }\n}\n\nexport default Fill;\n","/**\n * @module ol/style/Stroke\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n * @property {CanvasLineCap} [lineCap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [lineJoin='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array} [lineDash] Line dash pattern. Default is `null` (no dash).\n * @property {number} [lineDashOffset=0] Line dash offset.\n * @property {number} [miterLimit=10] Miter limit.\n * @property {number} [offset] Line offset in pixels along the normal. A positive value offsets the line to the right,\n * relative to the direction of the line. Default is `undefined` (no offset).\n * @property {number} [width] Width.\n */\n\n/**\n * @classdesc\n * Set stroke style for vector features.\n * Note that the defaults given are the Canvas defaults, which will be used if\n * option is not defined. The `get` functions return whatever was entered in\n * the options; they will not return the default.\n * @api\n */\nclass Stroke {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options || {};\n\n /**\n * @private\n * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike}\n */\n this.color_ = options.color !== undefined ? options.color : null;\n\n /**\n * @private\n * @type {CanvasLineCap|undefined}\n */\n this.lineCap_ = options.lineCap;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.lineDash_ = options.lineDash !== undefined ? options.lineDash : null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lineDashOffset_ = options.lineDashOffset;\n\n /**\n * @private\n * @type {CanvasLineJoin|undefined}\n */\n this.lineJoin_ = options.lineJoin;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.miterLimit_ = options.miterLimit;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.offset_ = options.offset;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.width_ = options.width;\n }\n\n /**\n * Clones the style.\n * @return {Stroke} The cloned style.\n * @api\n */\n clone() {\n const color = this.getColor();\n return new Stroke({\n color: Array.isArray(color) ? color.slice() : color || undefined,\n lineCap: this.getLineCap(),\n lineDash: this.getLineDash() ? this.getLineDash().slice() : undefined,\n lineDashOffset: this.getLineDashOffset(),\n lineJoin: this.getLineJoin(),\n miterLimit: this.getMiterLimit(),\n offset: this.getOffset(),\n width: this.getWidth(),\n });\n }\n\n /**\n * Get the stroke color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} Color.\n * @api\n */\n getColor() {\n return this.color_;\n }\n\n /**\n * Get the line cap type for the stroke.\n * @return {CanvasLineCap|undefined} Line cap.\n * @api\n */\n getLineCap() {\n return this.lineCap_;\n }\n\n /**\n * Get the line dash style for the stroke.\n * @return {Array|null} Line dash.\n * @api\n */\n getLineDash() {\n return this.lineDash_;\n }\n\n /**\n * Get the line dash offset for the stroke.\n * @return {number|undefined} Line dash offset.\n * @api\n */\n getLineDashOffset() {\n return this.lineDashOffset_;\n }\n\n /**\n * Get the line join type for the stroke.\n * @return {CanvasLineJoin|undefined} Line join.\n * @api\n */\n getLineJoin() {\n return this.lineJoin_;\n }\n\n /**\n * Get the miter limit for the stroke.\n * @return {number|undefined} Miter limit.\n * @api\n */\n getMiterLimit() {\n return this.miterLimit_;\n }\n\n /**\n * Get the line offset in pixels.\n * @return {number|undefined} Offset.\n * @api\n */\n getOffset() {\n return this.offset_;\n }\n\n /**\n * Get the stroke width.\n * @return {number|undefined} Width.\n * @api\n */\n getWidth() {\n return this.width_;\n }\n\n /**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} color Color.\n * @api\n */\n setColor(color) {\n this.color_ = color;\n }\n\n /**\n * Set the line cap.\n *\n * @param {CanvasLineCap|undefined} lineCap Line cap.\n * @api\n */\n setLineCap(lineCap) {\n this.lineCap_ = lineCap;\n }\n\n /**\n * Set the line dash.\n *\n * @param {Array|null} lineDash Line dash.\n * @api\n */\n setLineDash(lineDash) {\n this.lineDash_ = lineDash;\n }\n\n /**\n * Set the line dash offset.\n *\n * @param {number|undefined} lineDashOffset Line dash offset.\n * @api\n */\n setLineDashOffset(lineDashOffset) {\n this.lineDashOffset_ = lineDashOffset;\n }\n\n /**\n * Set the line join.\n *\n * @param {CanvasLineJoin|undefined} lineJoin Line join.\n * @api\n */\n setLineJoin(lineJoin) {\n this.lineJoin_ = lineJoin;\n }\n\n /**\n * Set the miter limit.\n *\n * @param {number|undefined} miterLimit Miter limit.\n * @api\n */\n setMiterLimit(miterLimit) {\n this.miterLimit_ = miterLimit;\n }\n\n /**\n * Set the line offset in pixels.\n *\n * @param {number|undefined} offset Offset.\n * @api\n */\n setOffset(offset) {\n this.offset_ = offset;\n }\n\n /**\n * Set the width.\n *\n * @param {number|undefined} width Width.\n * @api\n */\n setWidth(width) {\n this.width_ = width;\n }\n}\n\nexport default Stroke;\n","/**\n * @module ol/size\n */\n\n/**\n * An array of numbers representing a size: `[width, height]`.\n * @typedef {Array} Size\n * @api\n */\n\n/**\n * Returns a buffered size.\n * @param {Size} size Size.\n * @param {number} num The amount by which to buffer.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} The buffered size.\n */\nexport function buffer(size, num, dest) {\n if (dest === undefined) {\n dest = [0, 0];\n }\n dest[0] = size[0] + 2 * num;\n dest[1] = size[1] + 2 * num;\n return dest;\n}\n\n/**\n * Determines if a size has a positive area.\n * @param {Size} size The size to test.\n * @return {boolean} The size has a positive area.\n */\nexport function hasArea(size) {\n return size[0] > 0 && size[1] > 0;\n}\n\n/**\n * Returns a size scaled by a ratio. The result will be an array of integers.\n * @param {Size} size Size.\n * @param {number} ratio Ratio.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} The scaled size.\n */\nexport function scale(size, ratio, dest) {\n if (dest === undefined) {\n dest = [0, 0];\n }\n dest[0] = (size[0] * ratio + 0.5) | 0;\n dest[1] = (size[1] * ratio + 0.5) | 0;\n return dest;\n}\n\n/**\n * Returns an `Size` array for the passed in number (meaning: square) or\n * `Size` array.\n * (meaning: non-square),\n * @param {number|Size} size Width and height.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} Size.\n * @api\n */\nexport function toSize(size, dest) {\n if (Array.isArray(size)) {\n return size;\n }\n if (dest === undefined) {\n dest = [size, size];\n } else {\n dest[0] = size;\n dest[1] = size;\n }\n return dest;\n}\n","/**\n * @module ol/style/Image\n */\nimport {toSize} from '../size.js';\nimport {abstract} from '../util.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} opacity Opacity.\n * @property {boolean} rotateWithView If the image should get rotated with the view.\n * @property {number} rotation Rotation.\n * @property {number|import(\"../size.js\").Size} scale Scale.\n * @property {Array} displacement Displacement.\n * @property {import('../style/Style.js').DeclutterMode} declutterMode Declutter mode: `declutter`, `obstacle`, `none`.\n */\n\n/**\n * @classdesc\n * A base class used for creating subclasses and not instantiated in\n * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and\n * {@link module:ol/style/RegularShape~RegularShape}.\n * @abstract\n * @api\n */\nclass ImageStyle {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n /**\n * @private\n * @type {number}\n */\n this.opacity_ = options.opacity;\n\n /**\n * @private\n * @type {boolean}\n */\n this.rotateWithView_ = options.rotateWithView;\n\n /**\n * @private\n * @type {number}\n */\n this.rotation_ = options.rotation;\n\n /**\n * @private\n * @type {number|import(\"../size.js\").Size}\n */\n this.scale_ = options.scale;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.scaleArray_ = toSize(options.scale);\n\n /**\n * @private\n * @type {Array}\n */\n this.displacement_ = options.displacement;\n\n /**\n * @private\n * @type {import('../style/Style.js').DeclutterMode}\n */\n this.declutterMode_ = options.declutterMode;\n }\n\n /**\n * Clones the style.\n * @return {ImageStyle} The cloned style.\n * @api\n */\n clone() {\n const scale = this.getScale();\n return new ImageStyle({\n opacity: this.getOpacity(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n }\n\n /**\n * Get the symbolizer opacity.\n * @return {number} Opacity.\n * @api\n */\n getOpacity() {\n return this.opacity_;\n }\n\n /**\n * Determine whether the symbolizer rotates with the map.\n * @return {boolean} Rotate with map.\n * @api\n */\n getRotateWithView() {\n return this.rotateWithView_;\n }\n\n /**\n * Get the symoblizer rotation.\n * @return {number} Rotation.\n * @api\n */\n getRotation() {\n return this.rotation_;\n }\n\n /**\n * Get the symbolizer scale.\n * @return {number|import(\"../size.js\").Size} Scale.\n * @api\n */\n getScale() {\n return this.scale_;\n }\n\n /**\n * Get the symbolizer scale array.\n * @return {import(\"../size.js\").Size} Scale array.\n */\n getScaleArray() {\n return this.scaleArray_;\n }\n\n /**\n * Get the displacement of the shape\n * @return {Array} Shape's center displacement\n * @api\n */\n getDisplacement() {\n return this.displacement_;\n }\n\n /**\n * Get the declutter mode of the shape\n * @return {import(\"./Style.js\").DeclutterMode} Shape's declutter mode\n * @api\n */\n getDeclutterMode() {\n return this.declutterMode_;\n }\n\n /**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @abstract\n * @return {Array} Anchor.\n */\n getAnchor() {\n return abstract();\n }\n\n /**\n * Get the image element for the symbolizer.\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {import('../DataTile.js').ImageLike} Image element.\n */\n getImage(pixelRatio) {\n return abstract();\n }\n\n /**\n * @abstract\n * @return {import('../DataTile.js').ImageLike} Image element.\n */\n getHitDetectionImage() {\n return abstract();\n }\n\n /**\n * Get the image pixel ratio.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel ratio.\n */\n getPixelRatio(pixelRatio) {\n return 1;\n }\n\n /**\n * @abstract\n * @return {import(\"../ImageState.js\").default} Image state.\n */\n getImageState() {\n return abstract();\n }\n\n /**\n * @abstract\n * @return {import(\"../size.js\").Size} Image size.\n */\n getImageSize() {\n return abstract();\n }\n\n /**\n * Get the origin of the symbolizer.\n * @abstract\n * @return {Array} Origin.\n */\n getOrigin() {\n return abstract();\n }\n\n /**\n * Get the size of the symbolizer (in pixels).\n * @abstract\n * @return {import(\"../size.js\").Size} Size.\n */\n getSize() {\n return abstract();\n }\n\n /**\n * Set the displacement.\n *\n * @param {Array} displacement Displacement.\n * @api\n */\n setDisplacement(displacement) {\n this.displacement_ = displacement;\n }\n\n /**\n * Set the opacity.\n *\n * @param {number} opacity Opacity.\n * @api\n */\n setOpacity(opacity) {\n this.opacity_ = opacity;\n }\n\n /**\n * Set whether to rotate the style with the view.\n *\n * @param {boolean} rotateWithView Rotate with map.\n * @api\n */\n setRotateWithView(rotateWithView) {\n this.rotateWithView_ = rotateWithView;\n }\n\n /**\n * Set the rotation.\n *\n * @param {number} rotation Rotation.\n * @api\n */\n setRotation(rotation) {\n this.rotation_ = rotation;\n }\n\n /**\n * Set the scale.\n *\n * @param {number|import(\"../size.js\").Size} scale Scale.\n * @api\n */\n setScale(scale) {\n this.scale_ = scale;\n this.scaleArray_ = toSize(scale);\n }\n\n /**\n * @abstract\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n listenImageChange(listener) {\n abstract();\n }\n\n /**\n * Load not yet loaded URI.\n * @abstract\n */\n load() {\n abstract();\n }\n\n /**\n * @abstract\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n unlistenImageChange(listener) {\n abstract();\n }\n\n /**\n * @return {Promise} `false` or Promise that resolves when the style is ready to use.\n */\n ready() {\n return Promise.resolve();\n }\n}\n\nexport default ImageStyle;\n","/**\n * @module ol/style/RegularShape\n */\n\nimport ImageState from '../ImageState.js';\nimport {asArray} from '../color.js';\nimport {asColorLike} from '../colorlike.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {\n defaultFillStyle,\n defaultLineCap,\n defaultLineJoin,\n defaultLineWidth,\n defaultMiterLimit,\n defaultStrokeStyle,\n} from '../render/canvas.js';\nimport IconImage from './IconImage.js';\nimport {shared as iconImageCache} from './IconImageCache.js';\nimport ImageStyle from './Image.js';\n\n/**\n * Specify radius for regular polygons, or both radius and radius2 for stars.\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points\n * is the number of sides.\n * @property {number} radius Radius of a regular polygon.\n * @property {number} [radius2] Second radius to make a star instead of a regular polygon.\n * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's points facing up.\n * @property {Array} [displacement=[0, 0]] Displacement of the shape in pixels.\n * Positive values will shift the shape right and up.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale. Unless two dimensional scaling is required a better\n * result may be obtained with appropriate settings for `radius` and `radius2`.\n * @property {import('./Style.js').DeclutterMode} [declutterMode] Declutter mode.\n */\n\n/**\n * @typedef {Object} RenderOptions\n * @property {import(\"../colorlike.js\").ColorLike|undefined} strokeStyle StrokeStyle.\n * @property {number} strokeWidth StrokeWidth.\n * @property {number} size Size.\n * @property {CanvasLineCap} lineCap LineCap.\n * @property {Array|null} lineDash LineDash.\n * @property {number} lineDashOffset LineDashOffset.\n * @property {CanvasLineJoin} lineJoin LineJoin.\n * @property {number} miterLimit MiterLimit.\n */\n\n/**\n * @classdesc\n * Set regular shape style for vector features. The resulting shape will be\n * a regular polygon when `radius` is provided, or a star when both `radius` and\n * `radius2` are provided.\n * @api\n */\nclass RegularShape extends ImageStyle {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n super({\n opacity: 1,\n rotateWithView:\n options.rotateWithView !== undefined ? options.rotateWithView : false,\n rotation: options.rotation !== undefined ? options.rotation : 0,\n scale: options.scale !== undefined ? options.scale : 1,\n displacement:\n options.displacement !== undefined ? options.displacement : [0, 0],\n declutterMode: options.declutterMode,\n });\n\n /**\n * @private\n * @type {HTMLCanvasElement|OffscreenCanvas|null}\n */\n this.hitDetectionCanvas_ = null;\n\n /**\n * @private\n * @type {import(\"./Fill.js\").default|null}\n */\n this.fill_ = options.fill !== undefined ? options.fill : null;\n\n /**\n * @private\n * @type {Array}\n */\n this.origin_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.points_ = options.points;\n\n /**\n * @protected\n * @type {number}\n */\n this.radius = options.radius;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.radius2_ = options.radius2;\n\n /**\n * @private\n * @type {number}\n */\n this.angle_ = options.angle !== undefined ? options.angle : 0;\n\n /**\n * @private\n * @type {import(\"./Stroke.js\").default|null}\n */\n this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.size_;\n\n /**\n * @private\n * @type {RenderOptions}\n */\n this.renderOptions_;\n\n /**\n * @private\n */\n this.imageState_ =\n this.fill_ && this.fill_.loading()\n ? ImageState.LOADING\n : ImageState.LOADED;\n if (this.imageState_ === ImageState.LOADING) {\n this.ready().then(() => (this.imageState_ = ImageState.LOADED));\n }\n this.render();\n }\n\n /**\n * Clones the style.\n * @return {RegularShape} The cloned style.\n * @api\n * @override\n */\n clone() {\n const scale = this.getScale();\n const style = new RegularShape({\n fill: this.getFill() ? this.getFill().clone() : undefined,\n points: this.getPoints(),\n radius: this.getRadius(),\n radius2: this.getRadius2(),\n angle: this.getAngle(),\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n style.setOpacity(this.getOpacity());\n return style;\n }\n\n /**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @return {Array} Anchor.\n * @api\n * @override\n */\n getAnchor() {\n const size = this.size_;\n const displacement = this.getDisplacement();\n const scale = this.getScaleArray();\n // anchor is scaled by renderer but displacement should not be scaled\n // so divide by scale here\n return [\n size[0] / 2 - displacement[0] / scale[0],\n size[1] / 2 + displacement[1] / scale[1],\n ];\n }\n\n /**\n * Get the angle used in generating the shape.\n * @return {number} Shape's rotation in radians.\n * @api\n */\n getAngle() {\n return this.angle_;\n }\n\n /**\n * Get the fill style for the shape.\n * @return {import(\"./Fill.js\").default|null} Fill style.\n * @api\n */\n getFill() {\n return this.fill_;\n }\n\n /**\n * Set the fill style.\n * @param {import(\"./Fill.js\").default|null} fill Fill style.\n * @api\n */\n setFill(fill) {\n this.fill_ = fill;\n this.render();\n }\n\n /**\n * @return {HTMLCanvasElement|OffscreenCanvas} Image element.\n * @override\n */\n getHitDetectionImage() {\n if (!this.hitDetectionCanvas_) {\n this.hitDetectionCanvas_ = this.createHitDetectionCanvas_(\n this.renderOptions_,\n );\n }\n return this.hitDetectionCanvas_;\n }\n\n /**\n * Get the image icon.\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|OffscreenCanvas} Image or Canvas element.\n * @api\n * @override\n */\n getImage(pixelRatio) {\n const fillKey = this.fill_?.getKey();\n const cacheKey =\n `${pixelRatio},${this.angle_},${this.radius},${this.radius2_},${this.points_},${fillKey}` +\n Object.values(this.renderOptions_).join(',');\n let image = /** @type {HTMLCanvasElement|OffscreenCanvas} */ (\n iconImageCache.get(cacheKey, null)?.getImage(1)\n );\n if (!image) {\n const renderOptions = this.renderOptions_;\n const size = Math.ceil(renderOptions.size * pixelRatio);\n const context = createCanvasContext2D(size, size);\n this.draw_(renderOptions, context, pixelRatio);\n\n image = context.canvas;\n const iconImage = new IconImage(\n image,\n undefined,\n null,\n ImageState.LOADED,\n null,\n );\n iconImageCache.set(cacheKey, null, iconImage);\n // Update the image in place to an ImageBitmap for better performance and lower memory usage\n createImageBitmap(image).then((imageBitmap) => {\n iconImage.setImage(imageBitmap);\n });\n }\n return image;\n }\n\n /**\n * Get the image pixel ratio.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel ratio.\n * @override\n */\n getPixelRatio(pixelRatio) {\n return pixelRatio;\n }\n\n /**\n * @return {import(\"../size.js\").Size} Image size.\n * @override\n */\n getImageSize() {\n return this.size_;\n }\n\n /**\n * @return {import(\"../ImageState.js\").default} Image state.\n * @override\n */\n getImageState() {\n return this.imageState_;\n }\n\n /**\n * Get the origin of the symbolizer.\n * @return {Array} Origin.\n * @api\n * @override\n */\n getOrigin() {\n return this.origin_;\n }\n\n /**\n * Get the number of points for generating the shape.\n * @return {number} Number of points for stars and regular polygons.\n * @api\n */\n getPoints() {\n return this.points_;\n }\n\n /**\n * Get the (primary) radius for the shape.\n * @return {number} Radius.\n * @api\n */\n getRadius() {\n return this.radius;\n }\n\n /**\n * Set the (primary) radius for the shape.\n * @param {number} radius Radius.\n * @api\n */\n setRadius(radius) {\n if (this.radius === radius) {\n return;\n }\n this.radius = radius;\n this.render();\n }\n\n /**\n * Get the secondary radius for the shape.\n * @return {number|undefined} Radius2.\n * @api\n */\n getRadius2() {\n return this.radius2_;\n }\n\n /**\n * Set the secondary radius for the shape.\n * @param {number|undefined} radius2 Radius2.\n * @api\n */\n setRadius2(radius2) {\n if (this.radius2_ === radius2) {\n return;\n }\n this.radius2_ = radius2;\n this.render();\n }\n\n /**\n * Get the size of the symbolizer (in pixels).\n * @return {import(\"../size.js\").Size} Size.\n * @api\n * @override\n */\n getSize() {\n return this.size_;\n }\n\n /**\n * Get the stroke style for the shape.\n * @return {import(\"./Stroke.js\").default|null} Stroke style.\n * @api\n */\n getStroke() {\n return this.stroke_;\n }\n\n /**\n * Set the stroke style.\n * @param {import(\"./Stroke.js\").default|null} stroke Stroke style.\n * @api\n */\n setStroke(stroke) {\n this.stroke_ = stroke;\n this.render();\n }\n\n /**\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n * @override\n */\n listenImageChange(listener) {}\n\n /**\n * Load not yet loaded URI.\n * @override\n */\n load() {}\n\n /**\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n * @override\n */\n unlistenImageChange(listener) {}\n\n /**\n * Calculate additional canvas size needed for the miter.\n * @param {string} lineJoin Line join\n * @param {number} strokeWidth Stroke width\n * @param {number} miterLimit Miter limit\n * @return {number} Additional canvas size needed\n * @private\n */\n calculateLineJoinSize_(lineJoin, strokeWidth, miterLimit) {\n if (\n strokeWidth === 0 ||\n this.points_ === Infinity ||\n (lineJoin !== 'bevel' && lineJoin !== 'miter')\n ) {\n return strokeWidth;\n }\n // m | ^\n // i | |\\ .\n // t >| #\\\n // e | |\\ \\ .\n // r \\s\\\n // | \\t\\ . .\n // \\r\\ . .\n // | \\o\\ . . . . .\n // e \\k\\ . . . .\n // | \\e\\ . . . . .\n // d \\ \\ . . . .\n // | _ _a_ _\\# . . .\n // r1 / ` . .\n // | . .\n // b / . .\n // | . .\n // / r2 . .\n // | . .\n // / . .\n // |α . .\n // / . .\n // ° center\n let r1 = this.radius;\n let r2 = this.radius2_ === undefined ? r1 : this.radius2_;\n if (r1 < r2) {\n const tmp = r1;\n r1 = r2;\n r2 = tmp;\n }\n const points =\n this.radius2_ === undefined ? this.points_ : this.points_ * 2;\n const alpha = (2 * Math.PI) / points;\n const a = r2 * Math.sin(alpha);\n const b = Math.sqrt(r2 * r2 - a * a);\n const d = r1 - b;\n const e = Math.sqrt(a * a + d * d);\n const miterRatio = e / a;\n if (lineJoin === 'miter' && miterRatio <= miterLimit) {\n return miterRatio * strokeWidth;\n }\n // Calculate the distance from center to the stroke corner where\n // it was cut short because of the miter limit.\n // l\n // ----+---- <= distance from center to here is maxr\n // /####|k ##\\\n // /#####^#####\\\n // /#### /+\\# s #\\\n // /### h/+++\\# t #\\\n // /### t/+++++\\# r #\\\n // /### a/+++++++\\# o #\\\n // /### p/++ fill +\\# k #\\\n ///#### /+++++^+++++\\# e #\\\n //#####/+++++/+\\+++++\\#####\\\n const k = strokeWidth / 2 / miterRatio;\n const l = (strokeWidth / 2) * (d / e);\n const maxr = Math.sqrt((r1 + k) * (r1 + k) + l * l);\n const bevelAdd = maxr - r1;\n if (this.radius2_ === undefined || lineJoin === 'bevel') {\n return bevelAdd * 2;\n }\n // If outer miter is over the miter limit the inner miter may reach through the\n // center and be longer than the bevel, same calculation as above but swap r1 / r2.\n const aa = r1 * Math.sin(alpha);\n const bb = Math.sqrt(r1 * r1 - aa * aa);\n const dd = r2 - bb;\n const ee = Math.sqrt(aa * aa + dd * dd);\n const innerMiterRatio = ee / aa;\n if (innerMiterRatio <= miterLimit) {\n const innerLength = (innerMiterRatio * strokeWidth) / 2 - r2 - r1;\n return 2 * Math.max(bevelAdd, innerLength);\n }\n return bevelAdd * 2;\n }\n\n /**\n * @return {RenderOptions} The render options\n * @protected\n */\n createRenderOptions() {\n let lineCap = defaultLineCap;\n let lineJoin = defaultLineJoin;\n let miterLimit = 0;\n let lineDash = null;\n let lineDashOffset = 0;\n let strokeStyle;\n let strokeWidth = 0;\n\n if (this.stroke_) {\n strokeStyle = asColorLike(this.stroke_.getColor() ?? defaultStrokeStyle);\n strokeWidth = this.stroke_.getWidth() ?? defaultLineWidth;\n lineDash = this.stroke_.getLineDash();\n lineDashOffset = this.stroke_.getLineDashOffset() ?? 0;\n lineJoin = this.stroke_.getLineJoin() ?? defaultLineJoin;\n lineCap = this.stroke_.getLineCap() ?? defaultLineCap;\n miterLimit = this.stroke_.getMiterLimit() ?? defaultMiterLimit;\n }\n\n const add = this.calculateLineJoinSize_(lineJoin, strokeWidth, miterLimit);\n const maxRadius = Math.max(this.radius, this.radius2_ || 0);\n const size = Math.ceil(2 * maxRadius + add);\n\n return {\n strokeStyle: strokeStyle,\n strokeWidth: strokeWidth,\n size: size,\n lineCap: lineCap,\n lineDash: lineDash,\n lineDashOffset: lineDashOffset,\n lineJoin: lineJoin,\n miterLimit: miterLimit,\n };\n }\n\n /**\n * @protected\n */\n render() {\n this.renderOptions_ = this.createRenderOptions();\n const size = this.renderOptions_.size;\n this.hitDetectionCanvas_ = null;\n this.size_ = [size, size];\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context The rendering context.\n * @param {number} pixelRatio The pixel ratio.\n */\n draw_(renderOptions, context, pixelRatio) {\n context.scale(pixelRatio, pixelRatio);\n // set origin to canvas center\n context.translate(renderOptions.size / 2, renderOptions.size / 2);\n\n this.createPath_(context);\n\n if (this.fill_) {\n let color = this.fill_.getColor();\n if (color === null) {\n color = defaultFillStyle;\n }\n context.fillStyle = asColorLike(color);\n context.fill();\n }\n if (renderOptions.strokeStyle) {\n context.strokeStyle = renderOptions.strokeStyle;\n context.lineWidth = renderOptions.strokeWidth;\n if (renderOptions.lineDash) {\n context.setLineDash(renderOptions.lineDash);\n context.lineDashOffset = renderOptions.lineDashOffset;\n }\n context.lineCap = renderOptions.lineCap;\n context.lineJoin = renderOptions.lineJoin;\n context.miterLimit = renderOptions.miterLimit;\n context.stroke();\n }\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n * @return {HTMLCanvasElement|OffscreenCanvas} Canvas containing the icon\n */\n createHitDetectionCanvas_(renderOptions) {\n let context;\n if (this.fill_) {\n let color = this.fill_.getColor();\n\n // determine if fill is transparent (or pattern or gradient)\n let opacity = 0;\n if (typeof color === 'string') {\n color = asArray(color);\n }\n if (color === null) {\n opacity = 1;\n } else if (Array.isArray(color)) {\n opacity = color.length === 4 ? color[3] : 1;\n }\n if (opacity === 0) {\n // if a transparent fill style is set, create an extra hit-detection image\n // with a default fill style\n context = createCanvasContext2D(renderOptions.size, renderOptions.size);\n this.drawHitDetectionCanvas_(renderOptions, context);\n }\n }\n return context ? context.canvas : this.getImage(1);\n }\n\n /**\n * @private\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context The context to draw in.\n */\n createPath_(context) {\n let points = this.points_;\n const radius = this.radius;\n if (points === Infinity) {\n context.arc(0, 0, radius, 0, 2 * Math.PI);\n } else {\n const radius2 = this.radius2_ === undefined ? radius : this.radius2_;\n if (this.radius2_ !== undefined) {\n points *= 2;\n }\n const startAngle = this.angle_ - Math.PI / 2;\n const step = (2 * Math.PI) / points;\n for (let i = 0; i < points; i++) {\n const angle0 = startAngle + i * step;\n const radiusC = i % 2 === 0 ? radius : radius2;\n context.lineTo(radiusC * Math.cos(angle0), radiusC * Math.sin(angle0));\n }\n context.closePath();\n }\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context The context.\n */\n drawHitDetectionCanvas_(renderOptions, context) {\n // set origin to canvas center\n context.translate(renderOptions.size / 2, renderOptions.size / 2);\n\n this.createPath_(context);\n\n context.fillStyle = defaultFillStyle;\n context.fill();\n if (renderOptions.strokeStyle) {\n context.strokeStyle = renderOptions.strokeStyle;\n context.lineWidth = renderOptions.strokeWidth;\n if (renderOptions.lineDash) {\n context.setLineDash(renderOptions.lineDash);\n context.lineDashOffset = renderOptions.lineDashOffset;\n }\n context.lineJoin = renderOptions.lineJoin;\n context.miterLimit = renderOptions.miterLimit;\n context.stroke();\n }\n }\n\n /**\n * @override\n */\n ready() {\n return this.fill_ ? this.fill_.ready() : Promise.resolve();\n }\n}\n\nexport default RegularShape;\n","/**\n * @module ol/style/Circle\n */\n\nimport RegularShape from './RegularShape.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} radius Circle radius.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {Array} [displacement=[0,0]] displacement\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale. A two dimensional scale will produce an ellipse.\n * Unless two dimensional scaling is required a better result may be obtained with an appropriate setting for `radius`.\n * @property {number} [rotation=0] Rotation in radians\n * (positive rotation clockwise, meaningful only when used in conjunction with a two dimensional scale).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view\n * (meaningful only when used in conjunction with a two dimensional scale).\n * @property {import('./Style.js').DeclutterMode} [declutterMode] Declutter mode\n */\n\n/**\n * @classdesc\n * Set circle style for vector features.\n * @api\n */\nclass CircleStyle extends RegularShape {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {radius: 5};\n\n super({\n points: Infinity,\n fill: options.fill,\n radius: options.radius,\n stroke: options.stroke,\n scale: options.scale !== undefined ? options.scale : 1,\n rotation: options.rotation !== undefined ? options.rotation : 0,\n rotateWithView:\n options.rotateWithView !== undefined ? options.rotateWithView : false,\n displacement:\n options.displacement !== undefined ? options.displacement : [0, 0],\n declutterMode: options.declutterMode,\n });\n }\n\n /**\n * Clones the style.\n * @return {CircleStyle} The cloned style.\n * @api\n * @override\n */\n clone() {\n const scale = this.getScale();\n const style = new CircleStyle({\n fill: this.getFill() ? this.getFill().clone() : undefined,\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n radius: this.getRadius(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n style.setOpacity(this.getOpacity());\n return style;\n }\n}\n\nexport default CircleStyle;\n","/**\n * @module ol/style/Style\n */\n\nimport {assert} from '../asserts.js';\nimport CircleStyle from './Circle.js';\nimport Fill from './Fill.js';\nimport Stroke from './Stroke.js';\n\n/**\n * Defines how symbols and text are decluttered on layers ith `declutter` set to `true`\n * **declutter**: Overlapping symbols and text are decluttered.\n * **obstacle**: Symbols and text are rendered, but serve as obstacle for subsequent attempts\n * to place a symbol or text at the same location.\n * **none**: No decluttering is done.\n *\n * @typedef {\"declutter\"|\"obstacle\"|\"none\"} DeclutterMode\n */\n\n/**\n * A function that takes a {@link module:ol/Feature~Feature} and a `{number}`\n * representing the view's resolution. The function should return a\n * {@link module:ol/style/Style~Style} or an array of them. This way e.g. a\n * vector layer can be styled. If the function returns `undefined`, the\n * feature will not be rendered.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike, number):(Style|Array