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import MVT from 'ol/format/MVT.js'; import Map from 'ol/Map.js'; import TileGrid from 'ol/tilegrid/TileGrid.js'; import TileJSON from 'ol/source/TileJSON.js'; import TileLayer from 'ol/layer/Tile.js'; import VectorLayer from 'ol/layer/Vector.js'; import VectorSource from 'ol/source/Vector.js'; import VectorTileLayer from 'ol/layer/VectorTile.js'; import VectorTileSource from 'ol/source/VectorTile.js'; import View from 'ol/View.js'; import applyStyleFunction, { _colorWithOpacity, getValue, } from './stylefunction.js'; import googleFonts from 'webfont-matcher/lib/fonts/google.js'; import mb2css from 'mapbox-to-css-font'; import {Color} from '@mapbox/mapbox-gl-style-spec'; import {assign, defaultResolutions} from './util.js'; import {createXYZ} from 'ol/tilegrid.js'; import {fromLonLat} from 'ol/proj.js'; import {isEmpty} from 'ol/obj.js'; import {unByKey} from 'ol/Observable.js'; /** * @typedef {import("ol/Map").default} PluggableMap * @typedef {import("ol/layer/Layer").default} Layer * @typedef {import("ol/source/Source").default} Source * @private */ const tilejsonCache = {}; const fontFamilyRegEx = /font-family: ?([^;]*);/; const stripQuotesRegEx = /("|')/g; let loadedFontFamilies; function hasFontFamily(family) { if (!loadedFontFamilies) { loadedFontFamilies = {}; const styleSheets = document.styleSheets; for (let i = 0, ii = styleSheets.length; i < ii; ++i) { const styleSheet = /** @type {CSSStyleSheet} */ (styleSheets[i]); try { const cssRules = styleSheet.rules || styleSheet.cssRules; if (cssRules) { for (let j = 0, jj = cssRules.length; j < jj; ++j) { const cssRule = cssRules[j]; if (cssRule.type == 5) { const match = cssRule.cssText.match(fontFamilyRegEx); loadedFontFamilies[match[1].replace(stripQuotesRegEx, '')] = true; } } } } catch (e) { // empty catch block } } } return family in loadedFontFamilies; } const processedFontFamilies = {}; const googleFamilies = googleFonts.getNames(); /** * @private * @param {Array} fonts Fonts. * @return {Array} Processed fonts. */ function getFonts(fonts) { const fontsKey = fonts.toString(); if (fontsKey in processedFontFamilies) { return fonts; } const googleFontDescriptions = fonts.map(function (font) { const parts = mb2css(font, 1).split(' '); return [parts.slice(3).join(' ').replace(/"/g, ''), parts[1] + parts[0]]; }); for (let i = 0, ii = googleFontDescriptions.length; i < ii; ++i) { const googleFontDescription = googleFontDescriptions[i]; const family = googleFontDescription[0]; if (!hasFontFamily(family) && googleFamilies.indexOf(family) !== -1) { const fontUrl = 'https://fonts.googleapis.com/css?family=' + family.replace(/ /g, '+') + ':' + googleFontDescription[1]; if (!document.querySelector('link[href="' + fontUrl + '"]')) { const markup = document.createElement('link'); markup.href = fontUrl; markup.rel = 'stylesheet'; document.head.appendChild(markup); } } } processedFontFamilies[fontsKey] = true; return fonts; } const spriteRegEx = /^(.*)(\?.*)$/; function withPath(url, path) { if (path && url.indexOf('.') === 0) { url = path + url; } return url; } function toSpriteUrl(url, path, extension) { url = withPath(url, path); const parts = url.match(spriteRegEx); return parts ? parts[1] + extension + (parts.length > 2 ? parts[2] : '') : url + extension; } /** * ```js * import {applyStyle} from 'ol-mapbox-style'; * ``` * * Applies a style function to an `ol.layer.VectorTile` or `ol.layer.Vector` * with an `ol.source.VectorTile` or an `ol.source.Vector`. The style function * will render all layers from the `glStyle` object that use the specified * `source`, or a subset of layers from the same source. The source needs to be * a `"type": "vector"` or `"type": "geojson"` source. * * Two additional properties will be set on the provided layer: * * * `mapbox-source`: The `id` of the Mapbox Style document's source that the * OpenLayers layer was created from. Usually `apply()` creates one * OpenLayers layer per Mapbox Style source, unless the layer stack has * layers from different sources in between. * * `mapbox-layers`: The `id`s of the Mapbox Style document's layers that are * included in the OpenLayers layer. * * @param {VectorTileLayer|VectorLayer} layer OpenLayers layer. * @param {string|Object} glStyle Mapbox Style object. * @param {string|Array<string>} source `source` key or an array of layer `id`s from the * Mapbox Style object. When a `source` key is provided, all layers for the * specified source will be included in the style function. When layer `id`s * are provided, they must be from layers that use the same source. * @param {string} [path=undefined] Path of the style file. Only required when * a relative path is used with the `"sprite"` property of the style. * @param {Array<number>} [resolutions=undefined] Resolutions for mapping resolution to zoom level. * @return {Promise} Promise which will be resolved when the style can be used * for rendering. */ export function applyStyle(layer, glStyle, source, path, resolutions) { return new Promise(function (resolve, reject) { // TODO: figure out where best place to check source type is // Note that the source arg is an array of gl layer ids and each must be // dereferenced to get source type to validate if (typeof glStyle != 'object') { glStyle = JSON.parse(glStyle); } if (glStyle.version != 8) { return reject(new Error('glStyle version 8 required.')); } if (!(layer instanceof VectorLayer || layer instanceof VectorTileLayer)) { return reject( new Error('Can only apply to VectorLayer or VectorTileLayer') ); } let spriteScale, spriteData, spriteImageUrl, style; function onChange() { Eif (!style && (!glStyle.sprite || spriteData)) { style = applyStyleFunction( layer, glStyle, source, resolutions, spriteData, spriteImageUrl, getFonts ); Iif (!layer.getStyle()) { reject(new Error(`Nothing to show for source [${source}]`)); } else { resolve(); } } else if (style) { layer.setStyle(style); resolve(); } else { reject(new Error('Something went wrong trying to apply style.')); } } if (glStyle.sprite) { spriteScale = window.devicePixelRatio >= 1.5 ? 0.5 : 1; const sizeFactor = spriteScale == 0.5 ? '@2x' : ''; let spriteUrl = toSpriteUrl(glStyle.sprite, path, sizeFactor + '.json'); fetch(spriteUrl, {credentials: 'same-origin'}) .then(function (response) { if (!response.ok && sizeFactor !== '') { spriteUrl = toSpriteUrl(glStyle.sprite, path, '.json'); return fetch(spriteUrl, {credentials: 'same-origin'}); } else { return response; } }) .then(function (response) { if (response.ok) { return response.json(); } else { reject( new Error( `Problem fetching sprite from ${spriteUrl}: ${response.statusText}` ) ); } }) .then(function (spritesJson) { if (spritesJson === undefined) { return reject(new Error('No sprites found.')); } spriteData = spritesJson; spriteImageUrl = toSpriteUrl( glStyle.sprite, path, sizeFactor + '.png' ); onChange(); }) .catch(function (err) { reject( new Error(`Sprites cannot be loaded: ${spriteUrl}: ${err.message}`) ); }); } else { onChange(); } }); } const emptyObj = {}; function setBackground(mapOrLayer, layer) { const background = { id: layer.id, type: layer.type, }; const functionCache = {}; function updateStyle(resolution) { const layout = layer.layout || {}; const paint = layer.paint || {}; background['paint'] = paint; const zoom = typeof mapOrLayer.getSource === 'function' ? mapOrLayer.getSource().getTileGrid().getZForResolution(resolution) : mapOrLayer.getView().getZoom(); const element = typeof mapOrLayer.getTargetElement === 'function' ? mapOrLayer.getTargetElement() : undefined; let bg, opacity; Eif (paint['background-color'] !== undefined) { bg = getValue( background, 'paint', 'background-color', zoom, emptyObj, functionCache ); if (element) { element.style.background = Color.parse(bg).toString(); } } if (paint['background-opacity'] !== undefined) { opacity = getValue( background, 'paint', 'background-opacity', zoom, emptyObj, functionCache ); if (element) { element.style.opacity = opacity; } } if (layout.visibility == 'none') { if (element) { element.style.backgroundColor = ''; element.style.opacity = ''; } return undefined; } return _colorWithOpacity(bg, opacity); } if (typeof mapOrLayer.getTargetElement === 'function') { Eif (mapOrLayer.getTargetElement()) { updateStyle(); } mapOrLayer.on(['change:resolution', 'change:target'], updateStyle); } else Eif (typeof mapOrLayer.setBackground === 'function') { mapOrLayer.setBackground(updateStyle); } else { throw new Error('Unable to apply background.'); } } /** * ```js * import {applyBackground} from 'ol-mapbox-style'; * ``` * Applies properties of the Mapbox Style's first `background` layer to the * provided map or VectorTile layer. * @param {PluggableMap|VectorTileLayer} mapOrLayer OpenLayers Map or VectorTile layer. * @param {Object} glStyle Mapbox Style object. */ export function applyBackground(mapOrLayer, glStyle) { glStyle.layers.some(function (l) { Eif (l.type == 'background') { setBackground(mapOrLayer, l); return true; } }); } function getSourceIdByRef(layers, ref) { let sourceId; layers.some(function (layer) { if (layer.id == ref) { sourceId = layer.source; return true; } }); return sourceId; } function extentFromTileJSON(tileJSON) { const bounds = tileJSON.bounds; if (bounds) { const ll = fromLonLat([bounds[0], bounds[1]]); const tr = fromLonLat([bounds[2], bounds[3]]); return [ll[0], ll[1], tr[0], tr[1]]; } } /** * Creates an OpenLayers VectorTile source for a gl source entry. * @param {Object} glSource "source" entry from a Mapbox Style object. * @param {string|undefined} url URL to use for the source. This is expected to be the complete http(s) url, * with access key applied.When not provided, `glSource.tiles` has to be set. * @return {Promise<import("ol/source/VectorTile").default>} Promise resolving to a VectorTile source. * @private */ export function setupVectorSource(glSource, url) { glSource = assign({}, glSource); const cacheKey = [url, JSON.stringify(glSource)].toString(); let tilejson = tilejsonCache[cacheKey]; if (!tilejson) { tilejson = new TileJSON({ url: glSource.tiles ? undefined : url, tileJSON: glSource.tiles ? glSource : undefined, }); tilejsonCache[cacheKey] = tilejson; } return new Promise((resolve) => { const key = tilejson.on('change', function () { const state = tilejson.getState(); if (state === 'ready') { const tileJSONDoc = tilejson.getTileJSON(); const tiles = Array.isArray(tileJSONDoc.tiles) ? tileJSONDoc.tiles : [tileJSONDoc.tiles]; if (url) { for (let i = 0, ii = tiles.length; i < ii; ++i) { tiles[i] = decodeURI(new URL(tiles[i], url).href); } } const tileGrid = tilejson.getTileGrid(); const extent = extentFromTileJSON(tileJSONDoc); const minZoom = tileJSONDoc.minzoom || 0; const maxZoom = tileJSONDoc.maxzoom || 22; let source = tilejson.get('ol-source'); if (source === undefined) { source = new VectorTileSource({ attributions: tilejson.getAttributions(), format: new MVT(), tileGrid: new TileGrid({ origin: tileGrid.getOrigin(0), extent: extent || tileGrid.getExtent(), minZoom: minZoom, resolutions: defaultResolutions.slice(0, maxZoom + 1), tileSize: 512, }), urls: tiles, }); tilejson.set('ol-source', source); } unByKey(key); resolve(source); } else if (state === 'error') { tilejson.set('ol-source', null); unByKey(key); resolve(undefined); } }); if (tilejson.getState() === 'ready') { tilejson.changed(); } }); } function setupVectorLayer(glSource, url) { const layer = new VectorTileLayer({ declutter: true, visible: false, }); setupVectorSource(glSource, url).then((source) => { layer.setSource(source); }); return layer; } function setupRasterLayer(glSource, url) { const layer = new TileLayer(); const source = new TileJSON({ transition: 0, url: glSource.tiles ? undefined : url, tileJSON: glSource.tiles ? glSource : undefined, crossOrigin: 'anonymous', }); const key = source.on('change', function () { const state = source.getState(); if (state === 'ready') { unByKey(key); const tileJSONDoc = /** @type {Object} */ (source.getTileJSON()); const extent = extentFromTileJSON(tileJSONDoc); const tileGrid = source.getTileGrid(); const tileSize = glSource.tileSize || tileJSONDoc.tileSize || 512; const minZoom = tileJSONDoc.minzoom || 0; const maxZoom = tileJSONDoc.maxzoom || 22; // Only works when using ES modules //@ts-ignore source.tileGrid = new TileGrid({ origin: tileGrid.getOrigin(0), extent: extent || tileGrid.getExtent(), minZoom: minZoom, resolutions: createXYZ({ maxZoom: maxZoom, tileSize: tileSize, }).getResolutions(), tileSize: tileSize, }); layer.setSource(source); } else Iif (state === 'error') { unByKey(key); layer.setSource(undefined); } }); source.setTileLoadFunction(function (tile, src) { if (src.indexOf('{bbox-epsg-3857}') != -1) { const bbox = source.getTileGrid().getTileCoordExtent(tile.getTileCoord()); src = src.replace('{bbox-epsg-3857}', bbox.toString()); } const img = /** @type {import("ol/ImageTile").default} */ (tile).getImage(); /** @type {HTMLImageElement} */ (img).src = src; }); return layer; } const geoJsonFormat = new GeoJSON(); function setupGeoJSONLayer(glSource, path) { const data = glSource.data; let features, geoJsonUrl; if (typeof data == 'string') { geoJsonUrl = withPath(data, path); } else { features = geoJsonFormat.readFeatures(data, { featureProjection: 'EPSG:3857', }); } return new VectorLayer({ source: new VectorSource({ attributions: glSource.attribution, features: features, format: geoJsonFormat, url: geoJsonUrl, }), visible: false, }); } function updateRasterLayerProperties(glLayer, layer, view, functionCache) { const zoom = view.getZoom(); const opacity = getValue( glLayer, 'paint', 'raster-opacity', zoom, emptyObj, functionCache ); layer.setOpacity(opacity); } function processStyle(glStyle, map, baseUrl, host, path, accessToken = '') { const promises = []; let view = map.getView(); Eif ( typeof view.options_ === 'object' ? isEmpty(view.options_) : !view.isDef() && !view.getRotation() && !view.getResolutions() ) { view = new View( assign(view.getProperties(), { maxResolution: defaultResolutions[0], }) ); map.setView(view); } if ('center' in glStyle && !view.getCenter()) { view.setCenter(fromLonLat(glStyle.center)); } if ('zoom' in glStyle && view.getZoom() === undefined) { view.setResolution(defaultResolutions[0] / Math.pow(2, glStyle.zoom)); } if (!view.getCenter() || view.getZoom() === undefined) { view.fit(view.getProjection().getExtent(), { nearest: true, size: map.getSize(), }); } if (glStyle.sprite) { Iif (glStyle.sprite.indexOf('mapbox://') == 0) { glStyle.sprite = baseUrl + '/sprite' + accessToken; } else Eif (glStyle.sprite.indexOf('http') != 0) { glStyle.sprite = (host ? host + path : '') + glStyle.sprite + accessToken; } } const glLayers = glStyle.layers; let layerIds = []; let glLayer, glSource, glSourceId, id, layer, url; for (let i = 0, ii = glLayers.length; i < ii; ++i) { glLayer = glLayers[i]; const type = glLayer.type; Iif (type == 'heatmap' || type == 'hillshade') { //FIXME Unsupported layer type } else if (type == 'background') { setBackground(map, glLayer); } else { id = glLayer.source || getSourceIdByRef(glLayers, glLayer.ref); // this technique assumes gl layers will be in a particular order if (id != glSourceId) { if (layerIds.length) { promises.push(finalizeLayer(layer, layerIds, glStyle, path, map)); layerIds = []; } glSource = glStyle.sources[id]; url = glSource.url; if (url) { url = withPath(url, path); if (url.indexOf('mapbox://') == 0) { const mapid = url.replace('mapbox://', ''); glSource.tiles = ['a', 'b', 'c', 'd'].map(function (host) { return ( 'https://' + host + '.tiles.mapbox.com/v4/' + mapid + '/{z}/{x}/{y}.' + (glSource.type == 'vector' ? 'vector.pbf' : 'png') + accessToken ); }); } else if (url.indexOf('/') === 0 && host.indexOf('http') === 0) { url = host + url; } } if (glSource.tiles) { glSource.tiles = glSource.tiles.map((url) => withPath(url, path)); } if (glSource.type == 'vector') { layer = setupVectorLayer(glSource, url); } else if (glSource.type == 'raster') { layer = setupRasterLayer(glSource, url); layer.setVisible( glLayer.layout ? glLayer.layout.visibility !== 'none' : true ); const functionCache = {}; view.on( 'change:resolution', updateRasterLayerProperties.bind( this, glLayer, layer, view, functionCache ) ); updateRasterLayerProperties(glLayer, layer, view, functionCache); } else Eif (glSource.type == 'geojson') { layer = setupGeoJSONLayer(glSource, path); } glSourceId = id; Eif (layer) { layer.set('mapbox-source', glSourceId); } } layerIds.push(glLayer.id); } } promises.push(finalizeLayer(layer, layerIds, glStyle, path, map)); map.set('mapbox-style', glStyle); return Promise.all(promises); } /** * ```js * import olms from 'ol-mapbox-style'; * ``` * * Loads and applies a Mapbox Style object to an OpenLayers Map. This includes * the map background, the layers, the center and the zoom. * * The center and zoom will only be set if present in the Mapbox Style document, * and if not already set on the OpenLayers map. * * Layers will be added to the OpenLayers map, without affecting any layers that * might already be set on the map. * * Layers added by `apply()` will have two additional properties: * * * `mapbox-source`: The `id` of the Mapbox Style document's source that the * OpenLayers layer was created from. Usually `apply()` creates one * OpenLayers layer per Mapbox Style source, unless the layer stack has * layers from different sources in between. * * `mapbox-layers`: The `id`s of the Mapbox Style document's layers that are * included in the OpenLayers layer. * * This function sets an additional `mapbox-style` property on the OpenLayers * map instance, which holds the Mapbox Style object. * * @param {PluggableMap|HTMLElement|string} map Either an existing OpenLayers Map * instance, or a HTML element, or the id of a HTML element that will be the * target of a new OpenLayers Map. * @param {string|Object} style JSON style object or style url pointing to a * Mapbox Style object. When using Mapbox APIs, the url must contain an access * token and look like * `https://api.mapbox.com/styles/v1/mapbox/bright-v9?access_token=[your_access_token_here]`. * When passed as JSON style object, all OpenLayers layers created by `apply()` * will be immediately available, but they may not have a source yet (i.e. when * they are defined by a TileJSON url in the Mapbox Style document). When passed * as style url, layers will be added to the map when the Mapbox Style document * is loaded and parsed. * @return {Promise} A promise that resolves after all layers have been added to * the OpenLayers Map instance, their sources set, and their styles applied. the * `resolve` callback will be called with the OpenLayers Map instance as * argument. */ export default function olms(map, style) { let promise, accessToken = '', baseUrl = '', host = '', path = ''; if (typeof map === 'string' || map instanceof HTMLElement) { map = new Map({ target: map, }); } if (typeof style === 'string') { const parts = style.match(spriteRegEx); Iif (parts) { baseUrl = parts[1]; accessToken = parts.length > 2 ? parts[2] : ''; } promise = new Promise(function (resolve, reject) { fetch(style, { credentials: 'same-origin', }) .then(function (response) { return response.json(); }) .then(function (glStyle) { const a = /** @type {HTMLAnchorElement} */ ( document.createElement('A') ); a.href = style; const href = a.href; path = a.pathname.split('/').slice(0, -1).join('/') + '/'; host = href.substr(0, href.indexOf(path)); processStyle(glStyle, map, baseUrl, host, path, accessToken) .then(function () { resolve(map); }) .catch(reject); }) .catch(function (err) { reject(new Error(`Could not load ${style}: ${err.message}`)); }); }); } else { promise = new Promise(function (resolve, reject) { processStyle(style, map) .then(function () { resolve(map); }) .catch(reject); }); } return promise; } /** * ```js * import {apply} from 'ol-mapbox-style'; * ``` * Like `olms`, but returns an `ol/Map` instance instead of a `Promise`. * * @param {PluggableMap|HTMLElement|string} map Either an existing OpenLayers Map * instance, or a HTML element, or the id of a HTML element that will be the * target of a new OpenLayers Map. * @param {string|Object} style JSON style object or style url pointing to a * Mapbox Style object. When using Mapbox APIs, the url must contain an access * token and look like * `https://api.mapbox.com/styles/v1/mapbox/bright-v9?access_token=[your_access_token_here]`. * When passed as JSON style object, all OpenLayers layers created by `apply()` * will be immediately available, but they may not have a source yet (i.e. when * they are defined by a TileJSON url in the Mapbox Style document). When passed * as style url, layers will be added to the map when the Mapbox Style document * is loaded and parsed. * @return {PluggableMap} The OpenLayers Map instance that will be populated with the * contents described in the Mapbox Style object. */ export function apply(map, style) { if (typeof map === 'string' || map instanceof HTMLElement) { map = new Map({ target: map, }); } setTimeout(function () { olms(map, style); }, 0); return map; } /** * If layerIds is not empty, applies the style specified in glStyle to the layer, * and adds the layer to the map. * * The layer may not yet have a source when the function is called. If so, the style * is applied to the layer via a once listener on the 'change:source' event. * * @param {Layer} layer An OpenLayers layer instance. * @param {Array<string>} layerIds Array containing layer ids of already-processed layers. * @param {Object} glStyle Style as a JSON object. * @param {string|undefined} path The path part of the style URL. Only required * when a relative path is used with the `"sprite"` property of the style. * @param {PluggableMap} map OpenLayers Map. * @return {Promise} Returns a promise that resolves after the source has * been set on the specified layer, and the style has been applied. * @private */ function finalizeLayer(layer, layerIds, glStyle, path, map) { let minZoom = 24; let maxZoom = 0; const glLayers = glStyle.layers; for (let i = 0, ii = glLayers.length; i < ii; ++i) { const glLayer = glLayers[i]; if (layerIds.indexOf(glLayer.id) !== -1) { minZoom = Math.min('minzoom' in glLayer ? glLayer.minzoom : 0, minZoom); maxZoom = Math.max('maxzoom' in glLayer ? glLayer.maxzoom : 24, maxZoom); } } return new Promise(function (resolve, reject) { const setStyle = function () { const source = layer.getSource(); if (!source || source.getState() === 'error') { reject( new Error( 'Error accessing data for source ' + layer.get('mapbox-source') ) ); return; } if (typeof source.getTileGrid === 'function') { const tileGrid = source.getTileGrid(); if (tileGrid) { const sourceMinZoom = tileGrid.getMinZoom(); if (minZoom > 0 || sourceMinZoom > 0) { layer.setMaxResolution( Math.min( defaultResolutions[minZoom], tileGrid.getResolution(sourceMinZoom) ) + 1e-9 ); } if (maxZoom < 24) { layer.setMinResolution(defaultResolutions[maxZoom] + 1e-9); } } } if ( source instanceof VectorSource || source instanceof VectorTileSource ) { applyStyle( /** @type {import("ol/layer/Vector").default|import("ol/layer/VectorTile").default} */ ( layer ), glStyle, layerIds, path ).then( function () { layer.setVisible(true); resolve(); }, function (e) { reject(e); } ); } else { resolve(); } }; layer.set('mapbox-layers', layerIds); if (map.getLayers().getArray().indexOf(layer) === -1) { map.addLayer(layer); } if (layer.getSource()) { setStyle(); } else { layer.once('change:source', setStyle); } }); } /** * ```js * import {getLayer} from 'ol-mapbox-style'; * ``` * Get the OpenLayers layer instance that contains the provided Mapbox Style * `layer`. Note that multiple Mapbox Style layers are combined in a single * OpenLayers layer instance when they use the same Mapbox Style `source`. * @param {PluggableMap} map OpenLayers Map. * @param {string} layerId Mapbox Style layer id. * @return {Layer} OpenLayers layer instance. */ export function getLayer(map, layerId) { const layers = map.getLayers().getArray(); for (let i = 0, ii = layers.length; i < ii; ++i) { const mapboxLayers = layers[i].get('mapbox-layers'); Eif (mapboxLayers && mapboxLayers.indexOf(layerId) !== -1) { return /** @type {Layer} */ (layers[i]); } } } /** * ```js * import {getLayers} from 'ol-mapbox-style'; * ``` * Get the OpenLayers layer instances for the provided Mapbox Style `source`. * @param {PluggableMap} map OpenLayers Map. * @param {string} sourceId Mapbox Style source id. * @return {Array<Layer>} OpenLayers layer instances. */ export function getLayers(map, sourceId) { const result = []; const layers = map.getLayers().getArray(); for (let i = 0, ii = layers.length; i < ii; ++i) { if (layers[i].get('mapbox-source') === sourceId) { result.push(/** @type {Layer} */ (layers[i])); } } return result; } /** * ```js * import {getSource} from 'ol-mapbox-style'; * ``` * Get the OpenLayers source instance for the provided Mapbox Style `source`. * @param {PluggableMap} map OpenLayers Map. * @param {string} sourceId Mapbox Style source id. * @return {Source} OpenLayers source instance. */ export function getSource(map, sourceId) { const layers = map.getLayers().getArray(); for (let i = 0, ii = layers.length; i < ii; ++i) { const source = /** @type {Layer} */ (layers[i]).getSource(); if (layers[i].get('mapbox-source') === sourceId) { return source; } } } export {finalizeLayer as _finalizeLayer, getFonts as _getFonts}; |