markPaintDirty()

in packages/core/src/rendering/render-object.ts [919:942]

• 18 lines of code
• 6 McCabe index (conditional complexity)

  markPaintDirty(cause?: RenderObject) {
    assert(!cause || cause._parent === this)
    if (this._paintDirty) {
      return
    }

    // 先标记自己
    this._paintDirty = true
    if (this.repaintBoundary) {
      // 当前是 RepaintBoundary，我们可以重绘自己
      assert(this._layer instanceof TransformLayer, '当前节点是 repaintBoundary，但 _layer 不是 ')
      if (this._owner) {
        this._owner.addPaintDirty(this)
        this._owner.requestVisualUpdate()
      }
    } else if (this._parent instanceof RenderObject) {
      // 逐级寻找 parent，到 repaintBoundary 为止
      this._parent.markPaintDirty(this)
    } else {
      // 根节点，例如 RenderCanvas，此时已经被加入 Pipeline.paintDirtyObjects
      // 我们只需要 requestVisualUpdate 即可
      this.owner?.requestVisualUpdate()
    }
  }