Method _setCacheLayer

src/common/mapping/WebMapV2.js:3015–3037

({ parentLayerId, layerInfo, reused = false, beforeId, subRenderLayers, metadata })

    }

    _setCacheLayer({ parentLayerId, layerInfo, reused = false, beforeId, subRenderLayers, metadata }) {
      const renderLayers = subRenderLayers || [{ layerId: layerInfo.id, reused }];
      if (!this._cacheLayerId.has(parentLayerId)) {
        const metadataInfo = Object.assign({}, metadata || layerInfo && layerInfo.metadata, { SM_Layer_Id: parentLayerId });
        this._cacheLayerId.set(parentLayerId, { renderLayers, metadata: metadataInfo });
      } else {
        const layerCacheData = this._cacheLayerId.get(parentLayerId);
        let matchIndex = -1;
        if (beforeId) {
          matchIndex = layerCacheData.renderLayers.findIndex((item) => item.layerId === beforeId);
        }
        const matchInsertIndex = matchIndex < 0 ? layerCacheData.renderLayers.length : matchIndex;
        layerCacheData.renderLayers.splice(matchInsertIndex, 0, ...renderLayers);
      }
      if (this.addLayersSucceededLen && this._cacheLayerId.size <= this.expectLayerLen) {
        this._changeSourceListModel();
        const appreciableLayers = this.getLayers();
        const selfAppreciableLayers = this.getSelfAppreciableLayers(appreciableLayers);
        const topLayerBeforeId = this._findTopLayerBeforeId(selfAppreciableLayers);
        this.rectifyLayersOrder(selfAppreciableLayers, topLayerBeforeId);
        this.fire('layeraddchanged', this._getSelfAppreciableLayers(appreciableLayers));
      }
    }

    _findTopLayerBeforeId(selfAppreciableLayers) {
      // fix 追加图层，异步的图层回来排序错乱