fix: error when dragging in outline view

docs/docs/api/model/drop-location.md

@@ -0,0 +1,54 @@
+---
+title: DropLocation
+sidebar_position: 13
+---
+
+> **@types** [IPublicModelDropLocation](https://github.com/alibaba/lowcode-engine/blob/main/packages/types/src/shell/model/drop-location.ts)<br/>
+> **@since** v1.1.0
+
+
+## 基本介绍
+
+拖拽放置位置模型
+
+## 变量
+
+### target
+
+拖拽放置位置目标
+
+`@type {IPublicModelNode}`
+
+相关类型：[IPublicModelNode](https://github.com/alibaba/lowcode-engine/blob/main/packages/types/src/shell/model/node.ts)
+
+### detail
+
+拖拽放置位置详情
+
+`@type {IPublicTypeLocationDetail}`
+
+相关类型：[IPublicTypeLocationDetail](https://github.com/alibaba/lowcode-engine/blob/main/packages/types/src/shell/type/location-detail.ts)
+
+### event
+
+拖拽放置位置对应的事件
+
+`@type {IPublicTypeLocationDetail}`
+
+相关类型：[IPublicModelLocateEvent](https://github.com/alibaba/lowcode-engine/blob/main/packages/types/src/shell/model/location-event.ts)
+
+## 方法签名
+
+### clone
+
+获取一份当前对象的克隆
+
+```typescript
+/**
+ * 获取一份当前对象的克隆
+ * get a clone object of current dropLocation
+ */
+clone(event: IPublicModelLocateEvent): IPublicModelDropLocation;
+```
+
+相关类型：[IPublicModelLocateEvent](https://github.com/alibaba/lowcode-engine/blob/main/packages/types/src/shell/model/location-event.ts)

packages/designer/src/designer/location.ts

@@ -101,10 +101,6 @@ export function getWindow(elem: Element | Document): Window {
 }
 export interface IDropLocation extends IPublicModelDropLocation {
 
-  readonly target: INode;
-
-  readonly event: ILocateEvent;
-
   readonly source: string;
 
   get document(): IPublicModelDocumentModel;

packages/shell/src/model/drop-location.ts

@@ -27,6 +27,10 @@ export class DropLocation implements IPublicModelDropLocation {
     return this[dropLocationSymbol].detail;
   }
 
+  get event(): IPublicModelLocateEvent {
+    return this[dropLocationSymbol].event;
+  }
+
   clone(event: IPublicModelLocateEvent): IPublicModelDropLocation {
     return new DropLocation(this[dropLocationSymbol].clone(event));
   }

packages/types/src/shell/model/drop-location.ts

@@ -1,10 +1,29 @@
 import { IPublicTypeLocationDetail } from '../type';
-import { IPublicModelLocateEvent } from './';
+import { IPublicModelLocateEvent, IPublicModelNode } from './';
 
 export interface IPublicModelDropLocation {
-  get target(): any;
 
-  readonly detail: IPublicTypeLocationDetail;
+  /**
+   * 拖拽位置目标
+   * get target of dropLocation
+   */
+  get target(): IPublicModelNode;
 
+  /**
+   * 拖拽放置位置详情
+   * get detail of dropLocation
+   */
+  get detail(): IPublicTypeLocationDetail;
+
+  /**
+   * 拖拽放置位置对应的事件
+   * get event of dropLocation
+   */
+  get event(): IPublicModelLocateEvent;
+
+  /**
+   * 获取一份当前对象的克隆
+   * get a clone object of current dropLocation
+   */
   clone(event: IPublicModelLocateEvent): IPublicModelDropLocation;
 }