fix v3文本标签图例由显示图层名改为字段名称 review by xiongjj

Author: chenxianhuii

src/common/mapping/WebMapV3.js

@@ -908,6 +908,7 @@ export function createWebMapV3Extending(SuperClass, { MapManager, mapRepo, crsMa
   _createLayerLegendList(layer, styleSetting) {
     const layerId = layer.id;
     const layerTitle = layer.title;
+    const textFieldName = styleSetting.type === 'text' && styleSetting.textField && styleSetting.textField.value.replace(/^\{|\}$/g, '');
     const commonStyleOptions = {
       themeField: layer.themeField || styleSetting.field,
       layerId,
@@ -971,7 +972,7 @@ export function createWebMapV3Extending(SuperClass, { MapManager, mapRepo, crsMa
         ...commonStyleOptions,
         styleGroup: [
           {
-            fieldValue: layerTitle || layerId,
+            fieldValue: textFieldName || layerTitle || layerId,
             style: {
               ...simpleResData,
               shape

test/mapboxgl/mapping/WebMapV3Spec.js

@@ -1116,6 +1116,12 @@ describe('mapboxgl-webmap3.0', () => {
       const webMapV3 = mapstudioWebmap._getWebMapInstance();
       expect(map).not.toBeUndefined();
       expect(webMapV3.getLegends().length).toBe(9);
+      const testLegend= webMapV3.getLegends().filter((item) => {
+        return item.layerId === "上海市可校外学习中心(1)";
+      })
+      expect(testLegend.length).toBe(2);
+      expect(testLegend[0].styleGroup[0].fieldValue).toBe("上海市可校外学习中心(1)");
+      expect(testLegend[1].styleGroup[0].fieldValue).toBe("学习中心（点）名称");
       mbglmap.prototype.getL7Scene = undefined;
       spyTest.calls.reset();
       done();