Method _createUniqueLayer

src/common/mapping/WebMapV2.js:1672–2144

(layerInfo, features)

    }

    async _createUniqueLayer(layerInfo, features) {
      const symbolConvertFunctionFactory = {
        unicode: ({ unicode }) => {
          return String.fromCharCode(parseInt(unicode.replace(/^&#x/, ''), 16));
        },
        fontSize: ({ fontSize }) => {
          if (fontSize) {
            return parseFloat(fontSize);
          }
          return 12;
        },
        rotation: ({ rotation }) => {
          return ((rotation || 0) * 180) / Math.PI;
        },
        fillColor: ({ fillColor, fillOpacity }) => {
          return ColorsPickerUtil.getColorWithOpacity(fillColor, fillOpacity);
        },
        strokeColor: ({ strokeColor, strokeOpacity }) => {
          return ColorsPickerUtil.getColorWithOpacity(strokeColor || 'rgba(0,0,0,0)', strokeOpacity);
        },
        strokeWidth: ({ strokeWidth }) => {
          return strokeWidth || 0;
        },
        offsetX: ({ offsetX, offsetY }) => {
          return [offsetX / 2 || 0, offsetY / 2 || 0];
        }
      };
      const defaultValueFactory = {
        unicode: '',
        fontSize: 12,
        rotation: 0,
        strokeColor: 'rgba(0,0,0,0)',
        fillColor: 'rgba(0,0,0,0)',
        strokeWidth: 0,
        offsetX: [0, 0]
      };
      const styleGroup = this.getUniqueStyleGroup(layerInfo, features);
      features = this.getFilterFeatures(layerInfo.filterCondition, features);
      const { layerID, minzoom, maxzoom, style } = layerInfo;
      const themeField = styleGroup[0].themeField;
      const type = layerInfo.featureType;

      const defultLayerStyle = layerInfo.style;
      // 样式expression池 样式key值为webmap的样式key值
      const expressionMap = {};
      // 自定义单值值对应的样式
      const customStyleMap = {};
      styleGroup.forEach((style) => {
        customStyleMap[style.value] = style;
      });
      // 遍历要素，判断该要素是不是在自定义单值中，若是在对应样式match expression中增加改要素的索引
      features.forEach(({ properties }) => {
        const customStyle = customStyleMap[properties[themeField]];
        if (customStyle) {
          const itemStyle = customStyle.style;
          for (const key in itemStyle) {
            if (Object.prototype.hasOwnProperty.call(itemStyle, key)) {
              const itemStyleElement = itemStyle[key];