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MapExtend.js
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/* Copyright© 2000 - 2024 SuperMap Software Co.Ltd. All rights reserved.
* This program are made available under the terms of the Apache License, Version 2.0
* which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/
import mapboxgl from 'mapbox-gl';
import { decryptSources } from './decryptSource';
import { getServiceKey } from '@supermap/iclient-common/util/EncryptRequest';
/**
* @function MapExtend
* @description 扩展 mapboxgl.Map。
* @private
*/
export var MapExtend = (function () {
if (mapboxgl.VectorTileSource && mapboxgl.VectorTileSource.prototype.beforeLoadBak === undefined) {
mapboxgl.VectorTileSource.prototype.beforeLoadBak = mapboxgl.VectorTileSource.prototype.beforeLoad;
mapboxgl.VectorTileSource.prototype.beforeLoad = async function (id, options) {
const url = options && options.tiles && options.tiles[0];
if (decryptSources.values.includes(id) && url) {
const decryptKey = await getServiceKey(url);
this.decryptKey = decryptKey;
}
this.beforeLoadBak(id, options);
};
}
const originMapProto = mapboxgl.Map.prototype;
mapboxgl.Map = class MapEnhance extends mapboxgl.Map {
constructor(options) {
super(options);
this.overlayLayersManager = {};
}
getSource(sourceId) {
const customOverlayerLayer = Object.values(this.overlayLayersManager).find(item => item.sourceId === sourceId);
if (customOverlayerLayer) {
if (customOverlayerLayer.getSource) {
return customOverlayerLayer.getSource();
}
return;
}
return originMapProto.getSource.call(this, sourceId);
}
removeSource(sourceId) {
const customOverlayerLayer = Object.values(this.overlayLayersManager).find(item => item.sourceId === sourceId);
if (customOverlayerLayer) {
if (customOverlayerLayer.removeSource) {
return customOverlayerLayer.removeSource();
}
return;
}
return originMapProto.removeSource.call(this, sourceId);
}
isSourceLoaded(sourceId) {
const customOverlayerLayer = Object.values(this.overlayLayersManager).find(item => item.sourceId === sourceId);
if (customOverlayerLayer) {
if (customOverlayerLayer.isSourceLoaded) {
return customOverlayerLayer.isSourceLoaded();
}
return;
}
return originMapProto.isSourceLoaded.call(this, sourceId);
}
getLayer(id) {
const overlayLayer = this.overlayLayersManager[id];
if (overlayLayer) {
return overlayLayer.getLayer ? overlayLayer.getLayer() : overlayLayer;
}
return this.style.getLayer(id);
}
addLayer(layer, before) {
if (layer.source || layer.type === 'custom' || layer.type === 'background') {
originMapProto.addLayer.call(this, layer, before);
// overlay文件夹下的图层基本都是自定义图层， 除去几个专题图
if (layer.overlay && !this.overlayLayersManager[layer.id]) {
this.overlayLayersManager[layer.id] = layer;
}
return this;
}
if (this.overlayLayersManager[layer.id] || this.style._layers[layer.id]) {
this.fire('error', {
error: new Error('A layer with this id already exists.')
});
return;
}
layer.onAdd && layer.onAdd(this);
this.overlayLayersManager[layer.id] = layer;
return this;
}
moveLayer(id, beforeId) {
if (this.overlayLayersManager[id]) {
this.overlayLayersManager[id].moveLayer
? this.overlayLayersManager[id].moveLayer(id, beforeId)
: this._moveToHandler(id, beforeId);
return this;
}
if (this.style._layers[id] && this.style._layers[beforeId]) {
this.style.moveLayer(id, beforeId);
this._update(true);
}
return this;
}
removeLayer(id) {
if (this.overlayLayersManager[id]) {
const layer = this.overlayLayersManager[id];
delete this.overlayLayersManager[id];
if (layer.type !== 'custom') {
if (layer.removeFromMap) {
layer.removeFromMap();
}
return this;
}
}
this.style.removeLayer(id);
this._update(true);
return this;
}
/**
* @function listLayers
* @category BaseTypes MapExtend
* @version 11.2.0
* @description 扩展mapboxgl.Map， 获取所有叠加图层;
* @returns {Array} 图层数组。
*/
listLayers() {
const layerList = [];
const originLayers = this.style._order || [];
layerList.push(...originLayers);
for (let key in this.overlayLayersManager) {
const layer = this.overlayLayersManager[key];
const layerId = layer.id;
if (!layerList.includes(layerId)) {
layerList.push(layerId);
}
}
return layerList;
}
getPaintProperty(layerId, name) {
const overlayLayer = this.overlayLayersManager[layerId];
if (overlayLayer) {
if (overlayLayer.getPaintProperty) {
return overlayLayer.getPaintProperty(name);
}
return;
}
return originMapProto.getPaintProperty.call(this, layerId, name);
}
getLayoutProperty(layerId, name) {
const overlayLayer = this.overlayLayersManager[layerId];
if (overlayLayer && overlayLayer.getLayoutProperty) {
if (overlayLayer.getLayoutProperty) {
return overlayLayer.getLayoutProperty(name);
}
return;
}
return originMapProto.getLayoutProperty.call(this, layerId, name);
}
// 目前扩展的 overlayer，只支持显示或隐藏图层操作
setLayoutProperty(layerID, name, value) {
const overlayLayer = this.overlayLayersManager[layerID];
if (overlayLayer) {
if (overlayLayer.setLayoutProperty) {
overlayLayer.setLayoutProperty(name, value);
this.style.fire('data', { dataType: 'style' });
}
return this;
}
this.style.setLayoutProperty(layerID, name, value);
this._update(true);
return this;
}
getFilter(layerId, filter, options) {
const overlayLayer = this.overlayLayersManager[layerId];
if (overlayLayer) {
if (overlayLayer.getFilter) {
return overlayLayer.getFilter(filter, options);
}
return;
}
return originMapProto.getFilter.call(this, layerId, filter, options);
}
setFilter(layerId, filter, options) {
const overlayLayer = this.overlayLayersManager[layerId];
if (overlayLayer) {
if (overlayLayer.setFilter) {
overlayLayer.setFilter(filter, options);
}
return this;
}
return originMapProto.setFilter.call(this, layerId, filter, options);
}
updateTransform(units, originX, originY, centerX, centerY, width, height) {
this.transform.units = units;
const mercatorZfromAltitude = this.mercatorZfromAltitude;
mapboxgl.MercatorCoordinate.fromLngLat = function (lngLatLike, altitude) {
altitude = altitude || 0;
const lngLat = mapboxgl.LngLat.convert(lngLatLike);
return new mapboxgl.MercatorCoordinate(
(lngLat.lng - originX) / width,
(originY - lngLat.lat) / height,
mercatorZfromAltitude(altitude, lngLat.lat)
);
};
mapboxgl.MercatorCoordinate.prototype.toLngLat = function () {
return new mapboxgl.LngLat(this.x * width + originX, originY - this.y * height);
};
this.customConvertPoint = window.URL.createObjectURL(
new Blob(
[
'customConvertPoint = {projectX:function(x){return (x - ' +
centerX +
') / ' +
width +
' + 0.5},projectY:function(y){y = 0.5 - ((y - ' +
centerY +
') / ' +
height +
');return y < 0 ? 0 : y > 1 ? 1 : y;},toY:function(y){return (0.5-y)*' +
height +
'+' +
centerY +
';}}'
],
{ type: 'text/javascript' }
)
);
}
on(type, layerId, listener) {
return this._eventsModeHandler({ type, layerId, listener, mode: 'on' });
}
once(type, layerId, listener) {
return this._eventsModeHandler({ type, layerId, listener, mode: 'once' });
}
off(type, layerId, listener) {
return this._eventsModeHandler({ type, layerId, listener, mode: 'off' });
}
queryRenderedFeatures(geometry, options) {
let overlayLayers = Object.keys(this.overlayLayersManager);
let layersOnMap;
if (options && options.layers) {
overlayLayers = options.layers.filter(item => this.overlayLayersManager[item]);
layersOnMap = options.layers.filter(item => !this.overlayLayersManager[item]);
}
const nextGeometry = geometry || [[0, 0], [this.transform.width, this.transform.height]];
const nextOptions = options || {};
delete nextOptions.layers;
const resultOnOverlayerLayers = overlayLayers.reduce((result, item) => {
const overlayLayer = this.overlayLayersManager[item];
if (overlayLayer.query && overlayLayer.queryRenderedFeatures) {
overlayLayer.queryRenderedFeatures(nextGeometry, nextOptions, (features) => {
result = result.concat(features);
});
}
return result;
}, []);
const resultOnMapLayers = originMapProto.queryRenderedFeatures.call(this, geometry, { ...options, layers: layersOnMap });
return resultOnMapLayers.concat(resultOnOverlayerLayers);
}
querySourceFeatures(sourceId, paramters) {
const customOverlayerLayer = Object.values(this.overlayLayersManager).find(item => item.sourceId === sourceId);
if (customOverlayerLayer) {
if (customOverlayerLayer.query && customOverlayerLayer.querySourceFeatures) {
return customOverlayerLayer.querySourceFeatures(paramters);
}
return;
}
return originMapProto.querySourceFeatures.call(this, sourceId, paramters);
}
/**
* @description 将图层移动到某个图层之前。
* @param {string} layerID -待插入的图层 ID。
* @param {boolean} [beforeLayerID] - 是否将本图层插入到图层 ID 为 layerID 的图层之前(如果为 false 则将本图层插入到图层 ID 为 layerID 的图层之后)。
*/
_moveToHandler(layerID, beforeLayerID) {
const layer = document.getElementById(layerID);
let beforeLayer;
if (beforeLayerID) {
beforeLayer = document.getElementById(beforeLayerID);
if (!beforeLayer) {
mapboxgl.Evented.prototype.fire('error', {
error: new Error(`Layer with id "${beforeLayerID}" does not exist on this document.`)
});
}
}
if (layer) {
if (beforeLayer) {
beforeLayer.parentNode.insertBefore(layer, beforeLayer);
} else {
//当没有传入beforeLayerID ，则默认将图层移动到最上面
layer.parentNode.appendChild(layer);
}
}
}
_eventsModeHandler({ type, layerId, listener, mode }) {
let layers = [];
if (listener) {
layers = layers.concat(layerId);
}
layers.forEach(id => {
const overlayLayer = this.overlayLayersManager[id] || {};
if (overlayLayer.interaction && overlayLayer[mode] && overlayLayer.events.includes(type)) {
overlayLayer[mode](type, listener || layerId);
}
});
const layerIdsOnMap = listener && layers.filter(id => !this.overlayLayersManager[id]);
if (layerIdsOnMap && !layerIdsOnMap.length) {
return this;
}
const nextLayerId = !layerIdsOnMap || typeof layerId === 'string' ? layerId : layerIdsOnMap;
return originMapProto[mode].call(this, type, nextLayerId, listener);
}
}
})();