migi/build/CacheComponent.js

A JavaScript MVVM on JSX

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _Event = require('./Event');

var _Event2 = _interopRequireDefault(_Event);

var _Component2 = require('./Component');

var _Component3 = _interopRequireDefault(_Component2);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var CacheComponent = function (_Component) {
  _inherits(CacheComponent, _Component);

  function CacheComponent() {
    var _ref;

    _classCallCheck(this, CacheComponent);

    for (var _len = arguments.length, data = Array(_len), _key = 0; _key < _len; _key++) {
      data[_key] = arguments[_key];
    }

    var _this = _possibleConstructorReturn(this, (_ref = CacheComponent.__proto__ || Object.getPrototypeOf(CacheComponent)).call.apply(_ref, [this].concat(data)));

    _this.__handler = {}; // 缓存data key的hash
    // this.__ccb = false; // 缓存1ms再数据分发的是否在缓存时间内的状态标识
    _this.__timeout;
    _this.__timecb;
    return _this;
  }

  // @overwrite


  _createClass(CacheComponent, [{
    key: '__data',
    value: function __data(k) {
      var self = this;
      // set触发数据变更时，若已DOM则打开开关
      if (self.__dom) {
        self.__canData = true;
      }

      if (!Array.isArray(k)) {
        k = [k];
      }
      k.forEach(function (k) {
        self.__handler[k] = true;
      });
      if (!self.__ccb) {
        self.__ccb = true;
        // 1ms后触发数据变更并重设状态
        self.__timeout = setTimeout(self.__timecb = function () {
          self.__ccb = false;
          var temp = self.__handler;
          var keys = Object.keys(temp);
          self.__handler = {};
          // 可能被清空
          if (keys.length) {
            self.__onData(keys);
            self.emit(_Event2.default.DATA, keys, keys.map(function (key) {
              return self[key];
            }));
          }
        }, 0);
      }
    }
  }, {
    key: 'flush',
    value: function flush() {
      if (this.__timeout) {
        clearTimeout(this.__timeout);
        this.__ccb = false;
        this.__timecb();
      }
    }
  }]);

  return CacheComponent;
}(_Component3.default);

exports.default = CacheComponent;