Method _setUniqueId

src/common/mapping/WebMapV3.js:540–602

* @private * @function WebMapV3.prototype._setUniqueId * @description 返回唯一 id 的 sources 和 layers。 * @param {Object} mapInfo - map 信息。

(style, projectInfo)

   * @param {Object} mapInfo - map 信息。
   */
  _setUniqueId(style, projectInfo) {
    const unspportedLayers = this._handleUnSupportedLayers(style);
    const layersToMap = JSON.parse(JSON.stringify(style.layers)).filter((layer) => {
      return !unspportedLayers.includes(layer.id);
    });
    const nextSources = {};
    const sourcesIdChangedMap = {};
    const layerIdToChange = [];
    const timestamp = `_${+new Date()}`;
    for (const sourceId in style.sources) {
      let nextSourceId = sourceId;
      if (this.map.getSource(sourceId)) {
        nextSourceId = sourceId + timestamp;
      }
      sourcesIdChangedMap[nextSourceId] = sourceId;
      nextSources[nextSourceId] = style.sources[sourceId];
      for (const layer of layersToMap) {
        if (layer.source === sourceId) {
          layer.source = nextSourceId;
        }
      }
    }
    for (const layer of layersToMap) {
      const originId = layer.id;
      const existLayer = this._getLayerOnMap(layer.id);
      if (existLayer) {
        if (
          this.options.checkSameLayer &&
          isSameRasterLayer(nextSources[layer.source], this.map.getSource(existLayer.source))
        ) {
          layer.metadata = layer.metadata || {};
          layer.metadata.reused = true;
          layer.source = sourcesIdChangedMap[layer.source];
        } else {
          const layerId = layer.id + timestamp;
          layer.id = layerId;
        }
      }
      layerIdToChange.push({ originId: originId, renderId: layer.id, id: originId });
    }
    const layerCatalogFromMapJson = JSON.parse(JSON.stringify(style.metadata.layerCatalog), 'parts');
    this._updateLayerCatalogsId({
      loopData: JSON.parse(JSON.stringify(layerCatalogFromMapJson)),
      catalogs: layerCatalogFromMapJson,
      layerIdMapList: layerIdToChange,
      unspportedLayers
    });
    const catalogsFromProjectInfo = JSON.parse(JSON.stringify(projectInfo.catalogs || []));
    this._updateLayerCatalogsId({
      loopData: JSON.parse(JSON.stringify(catalogsFromProjectInfo)),
      catalogs: catalogsFromProjectInfo,
      layerIdMapList: layerIdToChange,
      catalogTypeField: 'catalogType',
      layerIdsField: 'layersContent',
      unspportedLayers
    });
    return {
      sources: nextSources,