feat:add editor destroy function

src/editor/core/contextmenu/ContextMenu.ts

@@ -49,13 +49,22 @@ export class ContextMenu {
     ]
     this.contextMenuContainerList = []
     this.contextMenuRelationShip = new Map()
+    this._addEvent()
+  }
+
+  private _addEvent() {
     // 接管菜单权限
-    document.addEventListener('contextmenu', this._proxyContextMenuEvent.bind(this))
+    document.addEventListener('contextmenu', this._proxyContextMenuEvent)
     // 副作用处理
-    document.addEventListener('mousedown', this._handleEffect.bind(this))
+    document.addEventListener('mousedown', this._handleEffect)
+  }
+
+  public removeEvent() {
+    document.removeEventListener('contextmenu', this._proxyContextMenuEvent)
+    document.removeEventListener('mousedown', this._handleEffect)
   }
 
-  private _proxyContextMenuEvent(evt: MouseEvent) {
+  private _proxyContextMenuEvent = (evt: MouseEvent) => {
     this.context = this._getContext()
     const renderList: IRegisterContextMenu[] = []
     let isRegisterContextMenu = false
@@ -82,7 +91,7 @@ export class ContextMenu {
     evt.preventDefault()
   }
 
-  private _handleEffect(evt: MouseEvent) {
+  private _handleEffect = (evt: MouseEvent) => {
     if (this.contextMenuContainerList.length) {
       // 点击非右键菜单内
       const contextMenuDom = findParent(

src/editor/core/draw/Draw.ts

@@ -63,6 +63,7 @@ export class Draw {
   private listener: Listener
 
   private canvasEvent: CanvasEvent
+  private globalEvent: GlobalEvent
   private cursor: Cursor
   private range: RangeManager
   private margin: Margin
@@ -91,6 +92,8 @@ export class Draw {
   private blockParticle: BlockParticle
   private control: Control
   private workerManager: WorkerManager
+  private scrollObserver: ScrollObserver
+  private selectionObserver: SelectionObserver
 
   private rowList: IRow[]
   private painterStyle: IElementStyle | null
@@ -99,12 +102,12 @@ export class Draw {
   private intersectionPageNo: number
 
   constructor(
-    container: HTMLDivElement,
+    rootContainer: HTMLElement,
     options: DeepRequired<IEditorOption>,
     elementList: IElement[],
     listener: Listener
   ) {
-    this.container = container
+    this.container = this._wrapContainer(rootContainer)
     this.pageList = []
     this.ctxList = []
     this.pageNo = 0
@@ -145,14 +148,14 @@ export class Draw {
     this.blockParticle = new BlockParticle(this)
     this.control = new Control(this)
 
-    new ScrollObserver(this)
-    new SelectionObserver()
+    this.scrollObserver = new ScrollObserver(this)
+    this.selectionObserver = new SelectionObserver()
 
     this.canvasEvent = new CanvasEvent(this)
     this.cursor = new Cursor(this, this.canvasEvent)
     this.canvasEvent.register()
-    const globalEvent = new GlobalEvent(this, this.canvasEvent)
-    globalEvent.register()
+    this.globalEvent = new GlobalEvent(this, this.canvasEvent)
+    this.globalEvent.register()
 
     this.workerManager = new WorkerManager(this)
 
@@ -513,6 +516,12 @@ export class Draw {
     }
   }
 
+  private _wrapContainer(rootContainer: HTMLElement): HTMLDivElement {
+    const container = document.createElement('div')
+    rootContainer.append(container)
+    return container
+  }
+
   private _formatContainer() {
     // 容器宽度需跟随纸张宽度
     this.container.style.position = 'relative'
@@ -1171,4 +1180,11 @@ export class Draw {
     })
   }
 
+  public destroy() {
+    this.container.remove()
+    this.globalEvent.removeEvent()
+    this.scrollObserver.removeEvent()
+    this.selectionObserver.removeEvent()
+  }
+
 }

src/editor/core/event/GlobalEvent.ts

@@ -38,21 +38,24 @@ export class GlobalEvent {
 
   public register() {
     this.cursor = this.draw.getCursor()
-    document.addEventListener('keyup', () => {
-      this.setRangeStyle()
-    })
-    document.addEventListener('click', (evt) => {
-      this.recoverEffect(evt)
-    })
-    document.addEventListener('mouseup', () => {
-      this.setDragState()
-    })
-    document.addEventListener('wheel', (evt: WheelEvent) => {
-      this.setPageScale(evt)
-    }, { passive: false })
+    this.addEvent()
+  }
+
+  private addEvent() {
+    document.addEventListener('keyup', this.setRangeStyle)
+    document.addEventListener('click', this.recoverEffect)
+    document.addEventListener('mouseup', this.setDragState)
+    document.addEventListener('wheel', this.setPageScale, { passive: false })
+  }
+
+  public removeEvent() {
+    document.removeEventListener('keyup', this.setRangeStyle)
+    document.removeEventListener('click', this.recoverEffect)
+    document.removeEventListener('mouseup', this.setDragState)
+    document.removeEventListener('wheel', this.setPageScale)
   }
 
-  public recoverEffect(evt: MouseEvent) {
+  public recoverEffect = (evt: MouseEvent) => {
     if (!this.cursor) return
     const cursorDom = this.cursor.getCursorDom()
     const agentDom = this.cursor.getAgentDom()
@@ -80,15 +83,15 @@ export class GlobalEvent {
     this.control.destroyControl()
   }
 
-  public setDragState() {
+  public setDragState = () => {
     this.canvasEvent.setIsAllowDrag(false)
   }
 
-  public setRangeStyle() {
+  public setRangeStyle = () => {
     this.range.setRangeStyle()
   }
 
-  public setPageScale(evt: WheelEvent) {
+  public setPageScale = (evt: WheelEvent) => {
     if (!evt.ctrlKey) return
     evt.preventDefault()
     const { scale } = this.options

src/editor/core/observer/ScrollObserver.ts

@@ -21,10 +21,18 @@ export class ScrollObserver {
         this._observer()
       }
     })
-    document.addEventListener('scroll', debounce(this._observer.bind(this), 150))
+    this._addEvent()
   }
 
-  private _observer() {
+  private _addEvent() {
+    document.addEventListener('scroll', this._observer)
+  }
+
+  public removeEvent() {
+    document.removeEventListener('scroll', this._observer)
+  }
+
+  private _observer = debounce(() => {
     const rect = this.pageContainer.getBoundingClientRect()
     const top = Math.abs(rect.top)
     const bottom = top + window.innerHeight
@@ -55,6 +63,6 @@ export class ScrollObserver {
     }
     this.draw.setIntersectionPageNo(intersectionPageNo)
     this.draw.setVisiblePageNoList(visiblePageNoList)
-  }
+  }, 150)
 
 }

src/editor/core/observer/SelectionObserver.ts

@@ -20,22 +20,31 @@ export class SelectionObserver {
     this.isMoving = false
     this.clientWidth = 0
     this.clientHeight = 0
+    this._addEvent()
+  }
+
+  private _addEvent() {
+    document.addEventListener('mousedown', this._mousedown)
+    document.addEventListener('mousemove', this._mousemove)
+    document.addEventListener('mouseup', this._mouseup)
+  }
 
-    document.addEventListener('mousedown', this._mousedown.bind(this))
-    document.addEventListener('mousemove', this._mousemove.bind(this))
-    document.addEventListener('mouseup', this._mouseup.bind(this))
+  public removeEvent() {
+    document.removeEventListener('mousedown', this._mousedown)
+    document.removeEventListener('mousemove', this._mousemove)
+    document.removeEventListener('mouseup', this._mouseup)
   }
 
-  private _mousedown() {
+  private _mousedown = () => {
     this.isMousedown = true
   }
 
-  private _mouseup() {
+  private _mouseup = () => {
     this.isMousedown = false
     this._stopMove()
   }
 
-  private _mousemove(evt: MouseEvent) {
+  private _mousemove = (evt: MouseEvent) => {
     if (!this.isMousedown) return
     const { x, y } = evt
     if (y < this.tippingPoints[0]) {

src/editor/core/shortcut/Shortcut.ts

@@ -18,12 +18,20 @@ export class Shortcut {
       ...richtextKeys
     ])
     // 全局快捷键
-    document.addEventListener('keydown', this._globalKeydown.bind(this))
+    this._addEvent()
     // 编辑器快捷键
     const agentDom = draw.getCursor().getAgentDom()
     agentDom.addEventListener('keydown', this._agentKeydown.bind(this))
   }
 
+  private _addEvent() {
+    document.addEventListener('keydown', this._globalKeydown)
+  }
+
+  public removeEvent() {
+    document.removeEventListener('keydown', this._globalKeydown)
+  }
+
   private _addShortcutList(payload: IRegisterShortcut[]) {
     for (let s = 0; s < payload.length; s++) {
       const shortCut = payload[s]
@@ -39,7 +47,7 @@ export class Shortcut {
     this._addShortcutList(payload)
   }
 
-  private _globalKeydown(evt: KeyboardEvent) {
+  private _globalKeydown = (evt: KeyboardEvent) => {
     if (!this.globalShortcutList.length) return
     this._execute(evt, this.globalShortcutList)
   }

src/editor/index.ts

@@ -34,6 +34,7 @@ export default class Editor {
   public command: Command
   public listener: Listener
   public register: Register
+  public destroy: Function
 
   constructor(container: HTMLDivElement, elementList: IElement[], options: IEditorOption = {}) {
     const headerOptions: Required<IHeader> = {
@@ -111,6 +112,12 @@ export default class Editor {
       contextMenu,
       shortcut
     })
+    // 注册销毁方法
+    this.destroy = () => {
+      draw.destroy()
+      shortcut.removeEvent()
+      contextMenu.removeEvent()
+    }
   }
 
 }

src/style.css

@@ -605,7 +605,7 @@ ul {
   background-image: url('./assets/images/print.svg');
 }
 
-.editor {
+.editor>div {
   margin: 80px auto;
 }