feat: MS保存styleSetting带有custom类型的图层，打开地图报错

（reviewed by xjj）

Author: Yuki-Zhao

src/common/mapping/WebMapV3.js

@@ -127,7 +127,8 @@ const LEGEND_SYMBOL_DEFAULT = {
 const LegendType = {
   LINEAR: 'LINEAR',
   UNIQUE: 'UNIQUE',
-  RANGE: 'RANGE'
+  RANGE: 'RANGE',
+  CUSTOM: 'CUSTOM'
 };
 
 const SymbolType = {
@@ -1005,6 +1006,10 @@ export function createWebMapV3Extending(SuperClass, { MapManager, mapRepo, crsMa
     if (currentType === 'simple') {
       return !!this._getImageIdFromValue(symbolsContent.value.style, SymbolType[symbolType]).length;
     }
+    if(currentType === 'custom') {
+      // 表达式暂不支持图例显示
+      return false;
+    }
     const styles = symbolsContent.values.map((v) => v.value).concat(symbolsContent.defaultValue);
     return styles.every((v) => {
       return !!this._getImageIdFromValue(v.style, SymbolType[symbolType]).length;
@@ -1171,6 +1176,9 @@ export function createWebMapV3Extending(SuperClass, { MapManager, mapRepo, crsMa
       }
       return LegendType.UNIQUE;
     }
+    if(currentType === 'custom') {
+      return LegendType.CUSTOM;
+    }
     return LegendType.RANGE;
   }
 

test/common/mapping/WebMapV3Spec.js

@@ -382,3 +382,57 @@ describe('WebMapV3 - _getLegendInfos', () => {
     });
   });
 });
+
+describe('WebMapV3 - legend symbol/style helpers', () => {
+  let instance;
+
+  beforeEach(() => {
+    instance = createWebMapV3Instance();
+  });
+
+  describe('_isAllPictureSymbolSaved', () => {
+    it('should return false when symbolsContent type is custom for line symbol', () => {
+      // custom 为表达式类型，图例暂不支持，直接返回 false
+      const symbolsContent = {
+        type: 'custom',
+        value: { style: { 'line-pattern': 'some-image' } }
+      };
+
+      expect(instance._isAllPictureSymbolSaved('line', symbolsContent, {})).toBe(false);
+    });
+
+    it('should return false when symbolsContent type is custom for polygon symbol', () => {
+      const symbolsContent = {
+        type: 'custom',
+        values: [{ value: { style: { 'fill-pattern': 'some-image' } } }],
+        defaultValue: { style: { 'fill-pattern': 'default-image' } }
+      };
+
+      expect(instance._isAllPictureSymbolSaved('polygon', symbolsContent, {})).toBe(false);
+    });
+  });
+
+  describe('_getLegendStyleType', () => {
+    it('should return CUSTOM when currentType is custom', () => {
+      const result = instance._getLegendStyleType({
+        styleField: 'color',
+        currentType: 'custom',
+        custom: [],
+        interpolateInfo: {}
+      });
+
+      expect(result).toBe('CUSTOM');
+    });
+
+    it('should return CUSTOM for non-color styleField when currentType is custom', () => {
+      const result = instance._getLegendStyleType({
+        styleField: 'width',
+        currentType: 'custom',
+        custom: [{ key: 'expr' }],
+        interpolateInfo: { type: 'custom' }
+      });
+
+      expect(result).toBe('CUSTOM');
+    });
+  });
+});