Class NodeChildren

packages/core/src/document/node/node-children.ts:11–326

}

export class NodeChildren {
  private emitter = createEventBus('NodeChildren')

  readonly owner: Node

  getNode() {
    return this.owner
  }

  @observable.shallow accessor children: Node[] = []

  @computed
  get size(): number {
    return this.children.length
  }

  get isEmptyNode(): boolean {
    return this.size < 1
  }

  isEmpty() {
    return this.isEmptyNode
  }

  constructor(owner: Node, data?: NodeSchema[]) {
    this.owner = owner
    this.children = (Array.isArray(data) ? data : []).map(child => {
      return this.owner.document.createNode(child)
    })
    this.internalInitParent()
  }

  export(stage: TRANSFORM_STAGE = TRANSFORM_STAGE.SAVE) {
    return this.children.map(node => {
      const data = node.export(stage)
      return data
    })
  }

  @action
  import(data?: NodeSchema | NodeSchema[], checkId = false) {
    data = (data ? (Array.isArray(data) ? data : [data]) : []).filter(d => !!d)

    const originChildren = this.children.slice()
    this.children.forEach(child => child.internalSetParent(null))

    const children = new Array<Node>(data.length)
    for (let i = 0, l = data.length; i < l; i++) {
      const child = originChildren[i]
      const item = data[i]

      let node: Node | undefined | null
      if (isNodeSchema(item) && !checkId && child && child.componentName === item.componentName) {
        node = child
        node.import(item)
      } else {
        node = this.owner.document?.createNode(item, checkId)
      }