Method _addLayersToMap

src/common/mapping/WebMapV3.js:479–518

* @private * @function WebMapV3.prototype._addLayersToMap * @description emit 图层加载成功事件。

()

   * @description emit 图层加载成功事件。
   */
  async _addLayersToMap() {
    try {
      const { sources, layers, layerCatalog, catalogs } = this._setUniqueId(this._mapInfo, this._mapResourceInfo);
      Object.assign(this._mapInfo, {
        sources,
        layers,
        metadata: Object.assign(this._mapInfo.metadata, { layerCatalog })
      });
      Object.assign(this._mapResourceInfo, { catalogs });
      const mapboxglLayers = layers.filter((layer) => !l7LayerUtil.isL7Layer(layer));
      const mapboxSourceIds = mapboxglLayers.map((layer) => layer.source);
      for(const sourceId of mapboxSourceIds) {
        const source = sources[sourceId]; 
        if(source && source.type === 'geojson' && source.data && source.data.type === 'supermap-rest-data') {
          source.data = await l7LayerUtil.getRestDataGeojsonByWebMap(source.data, {iportalServiceProxyUrlPrefix: this.options.server, withoutFormatSuffix: true});
        }
      }
      mapboxglLayers.forEach((layer) => {
        if (layer.metadata && layer.metadata.reused) {
          return;
        }
        layer.source && !this.map.getSource(layer.source) && this.map.addSource(layer.source, sources[layer.source]);
        // L7才会用到此属性
        if (layer.type === 'symbol' && layer.layout['text-z-offset'] === 0) {
          delete layer.layout['text-z-offset'];
        }
        this.map.addLayer(layer);
      });
      const l7Layers = layers.filter((layer) => l7LayerUtil.isL7Layer(layer));
      if (l7Layers.length > 0) {
        const params = this._getAddL7LayersParams(layers, sources, l7Layers);
        await l7LayerUtil.addL7Layers(params);
      }
      this._createLegendInfo();
      this._sendMapToUser();
    } catch (error) {
      this.fire('mapcreatefailed', { error, map: this.map });
      console.error(error);
    }
  }

  _getAddL7LayersParams(layers, sources, l7Layers) {
    return {