fix: remove unnecessary structure and update label attributes (#6538)

- Removed redundant structure in the label rendering process.
- Replaced elementStyle with element to expose the correct attributes in label functions.

__tests__/plots/bugfix/issue-5474.ts

@@ -27,7 +27,7 @@ export function issue5474(context) {
       .encode('color', 'genre')
       .label({
         text: 'genre',
-        fill: (_, i, array, d) => d.elementStyle.fill,
+        fill: (_, i, array, d) => d.element.attributes.fill,
       });
   }
 

site/docs/spec/label/overview.zh.md

@@ -127,7 +127,7 @@ chart
       d,
       i,
       data,
-      { channel, elementStyle }, // 聚合图形的样式 & label依赖元素的样式
+      { channel, element }, // 聚合图形的样式 & label所依赖元素
     ) => (channel.y[i] < 11700 ? '#E49361' : '#4787F7'),
   );
 ```

src/runtime/plot.ts

@@ -1198,7 +1198,7 @@ function plotLabel(
         const L = getLabels(options, i, e);
         L.forEach((l) => {
           labelShapeFunction.set(l, (data) =>
-            shapeFunction({ ...data, elementStyle: e.attributes }),
+            shapeFunction({ ...data, element: e }),
           );
           labelDescriptor.set(l, labelOption);
         });
@@ -1367,16 +1367,16 @@ function createLabelShapeFunction(
       style: abstractStyle,
       render,
       selector,
-      elementStyle,
+      element,
       ...abstractOptions
     } = options;
 
     const visualOptions = mapObject(
       { ...abstractOptions, ...abstractStyle } as Record<string, any>,
       (d) =>
         valueOf(d, datum, index, abstractData, {
-          channel: { ...channel },
-          elementStyle,
+          channel,
+          element,
         }),
     );
     const { shape = defaultLabelShape, text, ...style } = visualOptions;
@@ -1401,7 +1401,7 @@ function valueOf(
   datum: Record<string, any>,
   i: number,
   data: Record<string, any>,
-  options: { channel: Record<string, any>; elementStyle?: Record<string, any> },
+  options: { channel: Record<string, any>; element?: G2Element },
 ) {
   if (typeof value === 'function') return value(datum, i, data, options);
   if (typeof value !== 'string') return value;