init from https://github.com/Hufe921/canvas-editor

docs/guide/contextmenu-custom.md

@@ -0,0 +1,44 @@
+# 自定义右键菜单
+
+## 使用方式
+
+```javascript
+import Editor from "@hufe921/canvas-editor"
+
+const instance = new Editor(container, <IElement[]>data, options)
+instance.register.contextMenuList([
+    {
+      key?: string;
+      isDivider?: boolean;
+      icon?: string;
+      name?: string; // 使用%s代表选区文本。示例：搜索：%s
+      shortCut?: string;
+      disable?: boolean;
+      when?: (payload: IContextMenuContext) => boolean;
+      callback?: (command: Command, context: IContextMenuContext) => any;
+      childMenus?: IRegisterContextMenu[];
+    }
+  ])
+```
+
+## getContextMenuList
+
+功能：获取注册的右键菜单列表
+
+用法：
+
+```javascript
+const contextMenuList = await instance.register.getContextMenuList()
+```
+
+备注：
+
+```javascript
+// 修改内部右键菜单示例
+contextmenuList.forEach(menu => {
+  // 通过菜单key找到菜单项后进行属性修改
+  if (menu.key === INTERNAL_CONTEXT_MENU_KEY.GLOBAL.PASTE) {
+    menu.when = () => false
+  }
+})
+```