Method createNode

packages/core/src/document/document.ts:183–218

(schema: NodeSchema, checkId = true)

  @action
  createNode(schema: NodeSchema, checkId = true) {
    if (schema?.id && this.hasNode(schema.id)) {
      schema.id = undefined
    }

    let node: Node | null = null
    let isNewNode = false

    if (schema?.id) {
      node = this.getNode(schema.id)
      if (node && node.componentName === schema.componentName) {
        if (node.parent) {
          node.internalSetParent(null, false)
        }
        node.import(schema, checkId)
      } else if (node) {
        node = null
      }
    }

    if (!node) {
      node = new Node(this, schema)
      isNewNode = true
    }

    this.nodes.add(node)
    this._nodesMap.set(node.id, node)
    this.emitter.emit(NODE_EVENT.ADD, node)

    // 追踪物料使用：仅对新创建的节点增加使用计数
    if (isNewNode && node.componentName) {
      this.designer.materials.incrementUsage(node.materialUsageKey)
    }

    return node
  }

  getNode(id: string) {
    return this._nodesMap.get(id) || null