feat: add override internal drop function api #643

docs/en/guide/override.md

@@ -28,3 +28,13 @@ Usage:
 ```javascript
 instance.override.copy = () => void
 ```
+
+## drop
+
+Feature: Override internal drop function
+
+Usage:
+
+```javascript
+instance.override.drop = (evt: DragEvent) => void
+```

docs/guide/override.md

@@ -28,3 +28,13 @@ instance.override.paste = (evt?: ClipboardEvent) => void
 ```javascript
 instance.override.copy = () => void
 ```
+
+## drop
+
+功能：重写拖放方法
+
+用法：
+
+```javascript
+instance.override.drop = (evt: DragEvent) => void
+```

src/editor/core/event/handlers/drop.ts

@@ -2,6 +2,13 @@ import { CanvasEvent } from '../CanvasEvent'
 import { pasteImage } from './paste'
 
 export function drop(evt: DragEvent, host: CanvasEvent) {
+  const draw = host.getDraw()
+  // 自定义拖放事件
+  const { drop } = draw.getOverride()
+  if (drop) {
+    drop(evt)
+    return
+  }
   evt.preventDefault()
   const data = evt.dataTransfer?.getData('text')
   if (data) {

src/editor/core/override/Override.ts

@@ -1,4 +1,5 @@
 export class Override {
   public paste: ((evt?: ClipboardEvent) => void) | undefined
   public copy: (() => void) | undefined
+  public drop: ((evt: DragEvent) => void) | undefined
 }