Method setValue

packages/designer/src/document/node/props/prop.ts:354–390

(val: IPublicTypeCompositeValue)

   */
  @action
  setValue(val: IPublicTypeCompositeValue) {
    if (val === this._value) return;
    const oldValue = this._value;
    this._value = val;
    this._code = null;
    const t = typeof val;
    if (val == null) {
      // this._value = undefined;
      this._type = 'literal';
    } else if (t === 'string' || t === 'number' || t === 'boolean') {
      this._type = 'literal';
    } else if (Array.isArray(val)) {
      this._type = 'list';
    } else if (isPlainObject(val)) {
      if (isJSSlot(val)) {
        this.setAsSlot(val);
      } else if (isJSExpression(val)) {
        this._type = 'expression';
      } else {
        this._type = 'map';
      }
    } else /* istanbul ignore next */ {
      this._type = 'expression';
      this._value = {
        type: 'JSExpression',
        value: valueToSource(val),
      };
    }

    this.dispose();
    // setValue 的时候，如果不重新建立 items，items 的 setValue 没有触发，会导致子项的响应式逻辑不能被触发
    this.setupItems();

    if (oldValue !== this._value) {
      this.emitChange({ oldValue });
    }
  }

  emitChange = ({
    oldValue,