fix: 修复类继承 observer 过的类无法使用 super.render 的问题

packages/amis-core/src/factory.tsx

@@ -60,6 +60,8 @@ export interface RendererBasicConfig {
   isolateScope?: boolean;
   isFormItem?: boolean;
   autoVar?: boolean; // 自动解析变量
+  // 如果要替换系统渲染器，则需要设置这个为 true
+  override?: boolean;
   // [propName:string]:any;
 }
 
@@ -107,9 +109,6 @@ export interface RendererConfig extends RendererBasicConfig {
   // 异步渲染器
   getComponent?: () => Promise<{default: RendererComponent} | any>;
 
-  // 如果要替换系统渲染器，则需要设置这个为 true
-  override?: boolean;
-
   // 原始组件
   Renderer?: RendererComponent;
 }
@@ -174,6 +173,29 @@ export function Renderer(config: RendererBasicConfig) {
   };
 }
 
+// mobx-react 的 observer 会修改原型链的 render 方法
+// 如果想继承覆盖组件的 render 方法，需要把原型链 render 还原回来
+// 否则无法调用 super.render 方法
+function fixMobxInjectRender<T extends Function>(klass: T): T {
+  const target = klass.prototype;
+
+  // mobx-react 篡改之前先记录原始 render
+  if (target?.render) {
+    target.__originRender = target.render;
+  }
+
+  // 将父级类上面被 mobx 篡改的 render 方法还原回来
+  // 而且当前类的 render 也是会被篡改的，所以父级上的其实不需要篡改
+  if (target?.__proto__?.hasOwnProperty('__originRender')) {
+    const originProto = target.__proto__;
+    target.__proto__ = Object.create(originProto.__proto__ || Object);
+    Object.assign(target.__proto__, originProto);
+    target.__proto__.render = originProto.__originRender;
+  }
+
+  return klass;
+}
+
 // 将 renderer 转成组件
 function rendererToComponent(
   component: RendererComponent,
@@ -184,7 +206,7 @@ function rendererToComponent(
       storeType: config.storeType,
       extendsData: config.storeExtendsData,
       shouldSyncSuperStore: config.shouldSyncSuperStore
-    })(observer(component));
+    })(observer(fixMobxInjectRender(component)));
   }
 
   if (config.isolateScope) {

packages/amis/src/renderers/Page.tsx

@@ -904,48 +904,24 @@ export default class Page extends React.Component<PageProps> {
     return header || right;
   }
 
-  render() {
+  renderContent(subProps: any) {
     const {
-      className,
       store,
       body,
       bodyClassName,
       render,
-      aside,
-      asideClassName,
       classnames: cx,
       showErrorMsg,
-      initApi,
       regions,
-      style,
-      data,
-      asideResizor,
-      asideSticky,
-      pullRefresh,
-      mobileUI,
       translate: __,
       loadingConfig,
+      initApi,
       id,
-      wrapperCustomStyle,
       env,
       themeCss
     } = this.props;
 
-    const subProps = {
-      onAction: this.handleAction,
-      onQuery: initApi ? this.handleQuery : undefined,
-      onChange: this.handleChange,
-      onBulkChange: this.handleBulkChange,
-      pageLoading: store.loading
-    };
-
-    const hasAside = Array.isArray(regions)
-      ? ~regions.indexOf('aside')
-      : aside && (!Array.isArray(aside) || aside.length);
-
-    const styleVar = buildStyle(style, data);
-
-    const pageContent = (
+    return (
       <div className={cx('Page-content')}>
         <div className={cx('Page-main')}>
           {this.renderHeader()}
@@ -990,6 +966,49 @@ export default class Page extends React.Component<PageProps> {
         </div>
       </div>
     );
+  }
+
+  render() {
+    const {
+      className,
+      store,
+      body,
+      bodyClassName,
+      render,
+      aside,
+      asideClassName,
+      classnames: cx,
+      showErrorMsg,
+      initApi,
+      regions,
+      style,
+      data,
+      asideResizor,
+      asideSticky,
+      pullRefresh,
+      mobileUI,
+      translate: __,
+      loadingConfig,
+      id,
+      wrapperCustomStyle,
+      env,
+      themeCss
+    } = this.props;
+
+    const subProps = {
+      onAction: this.handleAction,
+      onQuery: initApi ? this.handleQuery : undefined,
+      onChange: this.handleChange,
+      onBulkChange: this.handleBulkChange,
+      pageLoading: store.loading
+    };
+
+    const hasAside = Array.isArray(regions)
+      ? ~regions.indexOf('aside')
+      : aside && (!Array.isArray(aside) || aside.length);
+
+    const styleVar = buildStyle(style, data);
+    const pageContent = this.renderContent(subProps);
 
     return (
       <div