@alilc/lowcode-shell/es/model/active-tracker.js

Shell Layer for AliLowCodeEngine

import _createClass from "@babel/runtime/helpers/createClass";
import { Node as ShellNode } from './node';
import { nodeSymbol } from '../symbols';
var activeTrackerSymbol = Symbol('activeTracker');
export var ActiveTracker = /*#__PURE__*/function () {
  function ActiveTracker(innerTracker) {
    this[activeTrackerSymbol] = void 0;
    this[activeTrackerSymbol] = innerTracker;
  }
  var _proto = ActiveTracker.prototype;
  _proto.onChange = function onChange(fn) {
    if (!fn) {
      return function () {};
    }
    return this[activeTrackerSymbol].onChange(function (t) {
      var innerNode = t.node,
        detail = t.detail,
        instance = t.instance;
      var publicNode = ShellNode.create(innerNode);
      var publicActiveTarget = {
        node: publicNode,
        detail: detail,
        instance: instance
      };
      fn(publicActiveTarget);
    });
  };
  _proto.track = function track(node) {
    this[activeTrackerSymbol].track(node[nodeSymbol]);
  };
  return _createClass(ActiveTracker, [{
    key: "target",
    get: function get() {
      var _target = this[activeTrackerSymbol]._target;
      if (!_target) {
        return null;
      }
      var innerNode = _target.node,
        detail = _target.detail,
        instance = _target.instance;
      var publicNode = ShellNode.create(innerNode);
      return {
        node: publicNode,
        detail: detail,
        instance: instance
      };
    }
  }]);
}();