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5x 5x 18x 13x 13x 2x 2x 13x 35x 35x 35x 35x | /* ol-mapbox-style - Use Mapbox Style objects with OpenLayers Copyright 2016-present ol-mapbox-style contributors License: https://raw.githubusercontent.com/openlayers/ol-mapbox-style/master/LICENSE */ import Circle from 'ol/style/Circle.js'; import Fill from 'ol/style/Fill.js'; import Icon from 'ol/style/Icon.js'; import RenderFeature from 'ol/render/Feature.js'; import Stroke from 'ol/style/Stroke.js'; import Style from 'ol/style/Style.js'; import Text from 'ol/style/Text.js'; import mb2css from 'mapbox-to-css-font'; import { Color, featureFilter as createFilter, derefLayers, expression, function as fn, latest as spec, } from '@mapbox/mapbox-gl-style-spec'; import { applyLetterSpacing, createCanvas, defaultResolutions, deg2rad, getZoomForResolution, wrapText, } from './util.js'; /** * @typedef {import("ol/layer/Vector").default} VectorLayer * @typedef {import("ol/layer/VectorTile").default} VectorTileLayer * @typedef {import("ol/style/Style").StyleFunction} StyleFunction */ const isFunction = fn.isFunction; const convertFunction = fn.convertFunction; const isExpression = expression.isExpression; const createPropertyExpression = expression.createPropertyExpression; const types = { 'Point': 1, 'MultiPoint': 1, 'LineString': 2, 'MultiLineString': 2, 'Polygon': 3, 'MultiPolygon': 3, }; const anchor = { 'center': [0.5, 0.5], 'left': [0, 0.5], 'right': [1, 0.5], 'top': [0.5, 0], 'bottom': [0.5, 1], 'top-left': [0, 0], 'top-right': [1, 0], 'bottom-left': [0, 1], 'bottom-right': [1, 1], }; const expressionData = function (rawExpression, propertySpec) { const compiledExpression = createPropertyExpression( rawExpression, propertySpec ); Iif (compiledExpression.result === 'error') { throw new Error( compiledExpression.value .map((err) => `${err.key}: ${err.message}`) .join(', ') ); } return compiledExpression.value; }; const emptyObj = {}; const zoomObj = {zoom: 0}; /** @private */ const functionCache = {}; let renderFeatureCoordinates, renderFeature; /** * @private * @param {Object} layer Gl object layer. * @param {string} layoutOrPaint 'layout' or 'paint'. * @param {string} property Feature property. * @param {number} zoom Zoom. * @param {Object} feature Gl feature. * @return {?} Value. */ export function getValue(layer, layoutOrPaint, property, zoom, feature) { const layerId = layer.id; if (!functionCache[layerId]) { functionCache[layerId] = {}; } const functions = functionCache[layerId]; if (!functions[property]) { let value = (layer[layoutOrPaint] || emptyObj)[property]; const propertySpec = spec[`${layoutOrPaint}_${layer.type}`][property]; if (value === undefined) { value = propertySpec.default; } let isExpr = isExpression(value); if (!isExpr && isFunction(value)) { value = convertFunction(value, propertySpec); isExpr = true; } if (isExpr) { const compiledExpression = expressionData(value, propertySpec); functions[property] = compiledExpression.evaluate.bind(compiledExpression); } else { if (propertySpec.type == 'color') { value = Color.parse(value); } functions[property] = function () { return value; }; } } zoomObj.zoom = zoom; return functions[property](zoomObj, feature); } /** @private */ const filterCache = {}; /** * @private * @param {string} layerId Layer id. * @param {?} filter Filter. * @param {Object} feature Feature. * @param {number} zoom Zoom. * @return {boolean} Filter result. */ function evaluateFilter(layerId, filter, feature, zoom) { if (!(layerId in filterCache)) { filterCache[layerId] = createFilter(filter).filter; } zoomObj.zoom = zoom; return filterCache[layerId](zoomObj, feature); } /** * @private * @param {?} color Color. * @param {number} opacity Opacity. * @return {string} Color. */ function colorWithOpacity(color, opacity) { Eif (color) { if (color.a === 0 || opacity === 0) { return undefined; } const a = color.a; opacity = opacity === undefined ? 1 : opacity; return ( 'rgba(' + Math.round((color.r * 255) / a) + ',' + Math.round((color.g * 255) / a) + ',' + Math.round((color.b * 255) / a) + ',' + a * opacity + ')' ); } return color; } const templateRegEx = /^([^]*)\{(.*)\}([^]*)$/; /** * @private * @param {string} text Text. * @param {Object} properties Properties. * @return {string} Text. */ function fromTemplate(text, properties) { let parts; do { parts = text.match(templateRegEx); if (parts) { const value = properties[parts[2]] || ''; text = parts[1] + value + parts[3]; } } while (parts); return text; } let recordLayer = false; /** * ```js * import {recordStyleLayer} from 'ol-mapbox-style/dist/stylefunction'; * ``` * Turns recording of the Mapbox Style's `layer` on and off. When turned on, * the layer that a rendered feature belongs to will be set as the feature's * `mapbox-layer` property. * @param {boolean} [record=false] Recording of the style layer is on. */ export function recordStyleLayer(record) { recordLayer = record; } /** * ```js * import stylefunction from 'ol-mapbox-style/dist/stylefunction'; * ``` * Creates a style function from the `glStyle` object for all layers that use * the specified `source`, which needs to be a `"type": "vector"` or * `"type": "geojson"` source and applies it to the specified OpenLayers layer. * * 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. * * This function also works in a web worker. In worker mode, the main thread needs * to listen to messages from the worker and respond with another message to make * sure that sprite image loading works: * * ```js * worker.addEventListener('message', event => { * if (event.data.action === 'loadImage') { * const image = new Image(); * image.crossOrigin = 'anonymous'; * image.addEventListener('load', function() { * createImageBitmap(image, 0, 0, image.width, image.height).then(imageBitmap => { * worker.postMessage({ * action: 'imageLoaded', * image: imageBitmap, * src: event.data.src * }, [imageBitmap]); * }); * }); * image.src = event.data.src; * } * }); * ``` * * @param {VectorLayer|VectorTileLayer} olLayer OpenLayers layer to * apply the style to. In addition to the style, the layer will get two * properties: `mapbox-source` will be the `id` of the `glStyle`'s source used * for the layer, and `mapbox-layers` will be an array of the `id`s of the * `glStyle`'s layers. * @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 {Array<number>} [resolutions=[78271.51696402048, 39135.75848201024, 19567.87924100512, 9783.93962050256, 4891.96981025128, 2445.98490512564, 1222.99245256282, 611.49622628141, 305.748113140705, 152.8740565703525, 76.43702828517625, 38.21851414258813, 19.109257071294063, 9.554628535647032, 4.777314267823516, 2.388657133911758, 1.194328566955879, 0.5971642834779395, 0.29858214173896974, 0.14929107086948487, 0.07464553543474244]] * Resolutions for mapping resolution to zoom level. * @param {Object} [spriteData=undefined] Sprite data from the url specified in * the Mapbox Style object's `sprite` property. Only required if a `sprite` * property is specified in the Mapbox Style object. * @param {string} [spriteImageUrl=undefined] Sprite image url for the sprite * specified in the Mapbox Style object's `sprite` property. Only required if a * `sprite` property is specified in the Mapbox Style object. * @param {function(Array<string>):Array<string>} [getFonts=undefined] Function that * receives a font stack as arguments, and returns a (modified) font stack that * is available. Font names are the names used in the Mapbox Style object. If * not provided, the font stack will be used as-is. This function can also be * used for loading web fonts. * @return {StyleFunction} Style function for use in * `ol.layer.Vector` or `ol.layer.VectorTile`. */ export default function ( olLayer, glStyle, source, resolutions = defaultResolutions, spriteData, spriteImageUrl, getFonts ) { Iif (typeof glStyle == 'string') { glStyle = JSON.parse(glStyle); } Iif (glStyle.version != 8) { throw new Error('glStyle version 8 required.'); } let spriteImage, spriteImgSize; if (spriteImageUrl) { Eif (typeof Image !== 'undefined') { const img = new Image(); img.crossOrigin = 'anonymous'; img.onload = function () { spriteImage = img; spriteImgSize = [img.width, img.height]; olLayer.changed(); img.onload = null; }; img.src = spriteImageUrl; } else if (typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope) { //eslint-disable-line const worker = /** @type {*} */ (self); // Main thread needs to handle 'loadImage' and dispatch 'imageLoaded' worker.postMessage({ action: 'loadImage', src: spriteImageUrl, }); worker.addEventListener('message', function handler(event) { if ( event.data.action === 'imageLoaded' && event.data.src === spriteImageUrl ) { spriteImage = event.data.image; spriteImgSize = [spriteImage.width, spriteImage.height]; } }); } } const allLayers = derefLayers(glStyle.layers); const layersBySourceLayer = {}; const mapboxLayers = []; let mapboxSource; for (let i = 0, ii = allLayers.length; i < ii; ++i) { const layer = allLayers[i]; const layerId = layer.id; if ( (typeof source == 'string' && layer.source == source) || source.indexOf(layerId) !== -1 ) { const sourceLayer = layer['source-layer']; if (!mapboxSource) { mapboxSource = layer.source; const source = glStyle.sources[mapboxSource]; Iif (!source) { throw new Error(`Source "${mapboxSource}" is not defined`); } const type = source.type; if (type !== 'vector' && type !== 'geojson') { throw new Error( `Source "${mapboxSource}" is not of type "vector" or "geojson", but "${type}"` ); } } let layers = layersBySourceLayer[sourceLayer]; if (!layers) { layers = []; layersBySourceLayer[sourceLayer] = layers; } layers.push({ layer: layer, index: i, }); mapboxLayers.push(layerId); } // TODO revisit when diffing gets added delete functionCache[layerId]; delete filterCache[layerId]; } const textHalo = new Stroke(); const textColor = new Fill(); const iconImageCache = {}; const patternCache = {}; const styles = []; const styleFunction = function (feature, resolution) { const properties = feature.getProperties(); const layers = layersBySourceLayer[properties.layer]; Iif (!layers) { return; } let zoom = resolutions.indexOf(resolution); Eif (zoom == -1) { zoom = getZoomForResolution(resolution, resolutions); } const type = types[feature.getGeometry().getType()]; const f = { properties: properties, type: type, }; let stylesLength = -1; let featureBelongsToLayer; for (let i = 0, ii = layers.length; i < ii; ++i) { const layerData = layers[i]; const layer = layerData.layer; const layerId = layer.id; const layout = layer.layout || emptyObj; const paint = layer.paint || emptyObj; if ( layout.visibility === 'none' || ('minzoom' in layer && zoom < layer.minzoom) || ('maxzoom' in layer && zoom >= layer.maxzoom) ) { continue; } const filter = layer.filter; if (!filter || evaluateFilter(layerId, filter, f, zoom)) { featureBelongsToLayer = layer; let color, opacity, fill, stroke, strokeColor, style; const index = layerData.index; if ( type == 3 && (layer.type == 'fill' || layer.type == 'fill-extrusion') ) { opacity = getValue(layer, 'paint', layer.type + '-opacity', zoom, f); Iif (layer.type + '-pattern' in paint) { const fillIcon = getValue( layer, 'paint', layer.type + '-pattern', zoom, f ); if (fillIcon) { const icon = typeof fillIcon === 'string' ? fromTemplate(fillIcon, properties) : fillIcon.toString(); if (spriteImage && spriteData && spriteData[icon]) { ++stylesLength; style = styles[stylesLength]; if ( !style || !style.getFill() || style.getStroke() || style.getText() ) { style = new Style({ fill: new Fill(), }); styles[stylesLength] = style; } fill = style.getFill(); style.setZIndex(index); const icon_cache_key = icon + '.' + opacity; let pattern = patternCache[icon_cache_key]; if (!pattern) { const spriteImageData = spriteData[icon]; const canvas = createCanvas( spriteImageData.width, spriteImageData.height ); const ctx = /** @type {CanvasRenderingContext2D} */ ( canvas.getContext('2d') ); ctx.globalAlpha = opacity; ctx.drawImage( spriteImage, spriteImageData.x, spriteImageData.y, spriteImageData.width, spriteImageData.height, 0, 0, spriteImageData.width, spriteImageData.height ); pattern = ctx.createPattern(canvas, 'repeat'); patternCache[icon_cache_key] = pattern; } fill.setColor(pattern); } } } else { color = colorWithOpacity( getValue(layer, 'paint', layer.type + '-color', zoom, f), opacity ); Eif (color) { Iif (layer.type + '-outline-color' in paint) { strokeColor = colorWithOpacity( getValue( layer, 'paint', layer.type + '-outline-color', zoom, f ), opacity ); } Eif (!strokeColor) { strokeColor = color; } ++stylesLength; style = styles[stylesLength]; if ( !style || !(style.getFill() && style.getStroke()) || style.getText() ) { style = new Style({ fill: new Fill(), stroke: new Stroke(), }); styles[stylesLength] = style; } fill = style.getFill(); fill.setColor(color); stroke = style.getStroke(); stroke.setColor(strokeColor); stroke.setWidth(1); style.setZIndex(index); } } } if (type != 1 && layer.type == 'line') { color = !('line-pattern' in paint) && 'line-color' in paint ? colorWithOpacity( getValue(layer, 'paint', 'line-color', zoom, f), getValue(layer, 'paint', 'line-opacity', zoom, f) ) : undefined; const width = getValue(layer, 'paint', 'line-width', zoom, f); Eif (color && width > 0) { ++stylesLength; style = styles[stylesLength]; if ( !style || !style.getStroke() || style.getFill() || style.getText() ) { style = new Style({ stroke: new Stroke(), }); styles[stylesLength] = style; } stroke = style.getStroke(); stroke.setLineCap(getValue(layer, 'layout', 'line-cap', zoom, f)); stroke.setLineJoin(getValue(layer, 'layout', 'line-join', zoom, f)); stroke.setMiterLimit( getValue(layer, 'layout', 'line-miter-limit', zoom, f) ); stroke.setColor(color); stroke.setWidth(width); stroke.setLineDash( paint['line-dasharray'] ? getValue(layer, 'paint', 'line-dasharray', zoom, f).map( function (x) { return x * width; } ) : null ); style.setZIndex(index); } } let hasImage = false; let text = null; let placementAngle = 0; let icon, iconImg, skipLabel; if ((type == 1 || type == 2) && 'icon-image' in layout) { const iconImage = getValue(layer, 'layout', 'icon-image', zoom, f); Eif (iconImage) { icon = typeof iconImage === 'string' ? fromTemplate(iconImage, properties) : iconImage.toString(); let styleGeom = undefined; if (spriteImage && spriteData && spriteData[icon]) { const iconRotationAlignment = getValue( layer, 'layout', 'icon-rotation-alignment', zoom, f ); Iif (type == 2) { const geom = feature.getGeometry(); // ol package and ol-debug.js only if (geom.getFlatMidpoint || geom.getFlatMidpoints) { const extent = geom.getExtent(); const size = Math.sqrt( Math.max( Math.pow((extent[2] - extent[0]) / resolution, 2), Math.pow((extent[3] - extent[1]) / resolution, 2) ) ); if (size > 150) { //FIXME Do not hard-code a size of 150 const midpoint = geom.getType() === 'MultiLineString' ? geom.getFlatMidpoints() : geom.getFlatMidpoint(); if (!renderFeature) { renderFeatureCoordinates = [NaN, NaN]; renderFeature = new RenderFeature( 'Point', renderFeatureCoordinates, [], {}, null ); } styleGeom = renderFeature; renderFeatureCoordinates[0] = midpoint[0]; renderFeatureCoordinates[1] = midpoint[1]; const placement = getValue( layer, 'layout', 'symbol-placement', zoom, f ); if ( placement === 'line' && iconRotationAlignment === 'map' ) { const stride = geom.getStride(); const coordinates = geom.getFlatCoordinates(); for ( let i = 0, ii = coordinates.length - stride; i < ii; i += stride ) { const x1 = coordinates[i]; const y1 = coordinates[i + 1]; const x2 = coordinates[i + stride]; const y2 = coordinates[i + stride + 1]; const minX = Math.min(x1, x2); const minY = Math.min(y1, y2); const maxX = Math.max(x1, x2); const maxY = Math.max(y1, y2); if ( midpoint[0] >= minX && midpoint[0] <= maxX && midpoint[1] >= minY && midpoint[1] <= maxY ) { placementAngle = Math.atan2(y1 - y2, x2 - x1); break; } } } } } } Eif (type !== 2 || styleGeom) { const iconSize = getValue( layer, 'layout', 'icon-size', zoom, f ); const iconColor = paint['icon-color'] !== undefined ? getValue(layer, 'paint', 'icon-color', zoom, f) : null; Iif (!iconColor || iconColor.a !== 0) { let icon_cache_key = icon + '.' + iconSize; if (iconColor !== null) { icon_cache_key += '.' + iconColor; } iconImg = iconImageCache[icon_cache_key]; if (!iconImg) { const spriteImageData = spriteData[icon]; if (iconColor !== null) { // cut out the sprite and color it const canvas = createCanvas( spriteImageData.width, spriteImageData.height ); const ctx = /** @type {CanvasRenderingContext2D} */ ( canvas.getContext('2d') ); ctx.drawImage( spriteImage, spriteImageData.x, spriteImageData.y, spriteImageData.width, spriteImageData.height, 0, 0, spriteImageData.width, spriteImageData.height ); const data = ctx.getImageData( 0, 0, canvas.width, canvas.height ); for (let c = 0, cc = data.data.length; c < cc; c += 4) { const a = iconColor.a; if (a !== 0) { data.data[c] = (iconColor.r * 255) / a; data.data[c + 1] = (iconColor.g * 255) / a; data.data[c + 2] = (iconColor.b * 255) / a; } data.data[c + 3] = a; } ctx.putImageData(data, 0, 0); iconImg = new Icon({ img: canvas, imgSize: [canvas.width, canvas.height], scale: iconSize / spriteImageData.pixelRatio, }); iconImageCache[icon_cache_key] = iconImg; } else { iconImg = new Icon({ img: spriteImage, imgSize: spriteImgSize, size: [spriteImageData.width, spriteImageData.height], offset: [spriteImageData.x, spriteImageData.y], rotateWithView: iconRotationAlignment === 'map', scale: iconSize / spriteImageData.pixelRatio, }); iconImageCache[icon_cache_key] = iconImg; } } } Iif (iconImg) { ++stylesLength; style = styles[stylesLength]; if ( !style || !style.getImage() || style.getFill() || style.getStroke() ) { style = new Style(); styles[stylesLength] = style; } style.setGeometry(styleGeom); iconImg.setRotation( placementAngle + deg2rad(getValue(layer, 'layout', 'icon-rotate', zoom, f)) ); iconImg.setOpacity( getValue(layer, 'paint', 'icon-opacity', zoom, f) ); iconImg.setAnchor( anchor[getValue(layer, 'layout', 'icon-anchor', zoom, f)] ); style.setImage(iconImg); text = style.getText(); style.setText(undefined); style.setZIndex(index); hasImage = true; skipLabel = false; } } else { skipLabel = true; } } } } Iif (type == 1 && 'circle-radius' in paint) { ++stylesLength; style = styles[stylesLength]; if ( !style || !style.getImage() || style.getFill() || style.getStroke() ) { style = new Style(); styles[stylesLength] = style; } const circleRadius = getValue( layer, 'paint', 'circle-radius', zoom, f ); const circleStrokeColor = colorWithOpacity( getValue(layer, 'paint', 'circle-stroke-color', zoom, f), getValue(layer, 'paint', 'circle-stroke-opacity', zoom, f) ); const circleColor = colorWithOpacity( getValue(layer, 'paint', 'circle-color', zoom, f), getValue(layer, 'paint', 'circle-opacity', zoom, f) ); const circleStrokeWidth = getValue( layer, 'paint', 'circle-stroke-width', zoom, f ); const cache_key = circleRadius + '.' + circleStrokeColor + '.' + circleColor + '.' + circleStrokeWidth; iconImg = iconImageCache[cache_key]; if (!iconImg) { iconImg = new Circle({ radius: circleRadius, stroke: circleStrokeColor && circleStrokeWidth > 0 ? new Stroke({ width: circleStrokeWidth, color: circleStrokeColor, }) : undefined, fill: circleColor ? new Fill({ color: circleColor, }) : undefined, }); iconImageCache[cache_key] = iconImg; } style.setImage(iconImg); text = style.getText(); style.setText(undefined); style.setGeometry(undefined); style.setZIndex(index); hasImage = true; } let label; if ('text-field' in layout) { const textField = getValue( layer, 'layout', 'text-field', zoom, f ).toString(); label = fromTemplate(textField, properties).trim(); opacity = getValue(layer, 'paint', 'text-opacity', zoom, f); } if (label && opacity && !skipLabel) { Eif (!hasImage) { ++stylesLength; style = styles[stylesLength]; Eif ( !style || !style.getText() || style.getFill() || style.getStroke() ) { style = new Style(); styles[stylesLength] = style; } style.setImage(undefined); style.setGeometry(undefined); } Eif (!style.getText()) { style.setText( text || new Text({ padding: [2, 2, 2, 2], }) ); } text = style.getText(); const textSize = Math.round( getValue(layer, 'layout', 'text-size', zoom, f) ); const fontArray = getValue(layer, 'layout', 'text-font', zoom, f); const textLineHeight = getValue( layer, 'layout', 'text-line-height', zoom, f ); const font = mb2css( getFonts ? getFonts(fontArray) : fontArray, textSize, textLineHeight ); const textTransform = layout['text-transform']; Iif (textTransform == 'uppercase') { label = label.toUpperCase(); } else Iif (textTransform == 'lowercase') { label = label.toLowerCase(); } const maxTextWidth = getValue( layer, 'layout', 'text-max-width', zoom, f ); const letterSpacing = getValue( layer, 'layout', 'text-letter-spacing', zoom, f ); const wrappedLabel = type == 2 ? applyLetterSpacing(label, letterSpacing) : wrapText(label, font, maxTextWidth, letterSpacing); text.setText(wrappedLabel); text.setFont(font); text.setRotation( deg2rad(getValue(layer, 'layout', 'text-rotate', zoom, f)) ); const textAnchor = getValue(layer, 'layout', 'text-anchor', zoom, f); const placement = hasImage || type == 1 ? 'point' : getValue(layer, 'layout', 'symbol-placement', zoom, f); text.setPlacement(placement); let textHaloWidth = getValue( layer, 'paint', 'text-halo-width', zoom, f ); const textOffset = getValue(layer, 'layout', 'text-offset', zoom, f); const textTranslate = getValue( layer, 'paint', 'text-translate', zoom, f ); // Text offset has to take halo width and line height into account let vOffset = 0; let hOffset = 0; if (placement == 'point') { let textAlign = 'center'; Iif (textAnchor.indexOf('left') !== -1) { textAlign = 'left'; hOffset = textHaloWidth; } else Iif (textAnchor.indexOf('right') !== -1) { textAlign = 'right'; hOffset = -textHaloWidth; } text.setTextAlign(textAlign); const textRotationAlignment = getValue( layer, 'layout', 'text-rotation-alignment', zoom, f ); text.setRotateWithView(textRotationAlignment == 'map'); } else { text.setMaxAngle( (deg2rad(getValue(layer, 'layout', 'text-max-angle', zoom, f)) * label.length) / wrappedLabel.length ); text.setTextAlign(); text.setRotateWithView(false); } let textBaseline = 'middle'; if (textAnchor.indexOf('bottom') == 0) { textBaseline = 'bottom'; vOffset = -textHaloWidth - 0.5 * (textLineHeight - 1) * textSize; } else Iif (textAnchor.indexOf('top') == 0) { textBaseline = 'top'; vOffset = textHaloWidth + 0.5 * (textLineHeight - 1) * textSize; } text.setTextBaseline(textBaseline); text.setOffsetX( textOffset[0] * textSize + hOffset + textTranslate[0] ); text.setOffsetY( textOffset[1] * textSize + vOffset + textTranslate[1] ); textColor.setColor( colorWithOpacity( getValue(layer, 'paint', 'text-color', zoom, f), opacity ) ); text.setFill(textColor); const haloColor = colorWithOpacity( getValue(layer, 'paint', 'text-halo-color', zoom, f), opacity ); Iif (haloColor) { textHalo.setColor(haloColor); // spec here : https://docs.mapbox.com/mapbox-gl-js/style-spec/#paint-symbol-text-halo-width // Halo width must be doubled because it is applied around the center of the text outline textHaloWidth *= 2; // 1/4 of text size (spec) x 2 const halfTextSize = 0.5 * textSize; textHalo.setWidth( textHaloWidth <= halfTextSize ? textHaloWidth : halfTextSize ); text.setStroke(textHalo); } else { text.setStroke(undefined); } const textPadding = getValue( layer, 'layout', 'text-padding', zoom, f ); const padding = text.getPadding(); Iif (textPadding !== padding[0]) { padding[0] = textPadding; padding[1] = textPadding; padding[2] = textPadding; padding[3] = textPadding; } style.setZIndex(index); } } } if (stylesLength > -1) { styles.length = stylesLength + 1; if (recordLayer) { Eif (typeof feature.set === 'function') { // ol/Feature feature.set('mapbox-layer', featureBelongsToLayer); } else { // ol/render/Feature feature.getProperties()['mapbox-layer'] = featureBelongsToLayer; } } return styles; } }; olLayer.setStyle(styleFunction); olLayer.set('mapbox-source', mapboxSource); olLayer.set('mapbox-layers', mapboxLayers); return styleFunction; } export { colorWithOpacity as _colorWithOpacity, filterCache as _filterCache, evaluateFilter as _evaluateFilter, fromTemplate as _fromTemplate, getValue as _getValue, functionCache as _functionCache, }; |