spatial-navigation/lib/ElementCollection.js

A javascript-based implementation of Spatial Navigation.

'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 _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };

var _EventAggregator = require('./EventAggregator');

var _EventAggregator2 = _interopRequireDefault(_EventAggregator);

var _constants = require('./util/constants');

var _Collection2 = require('./Collection');

var _Collection3 = _interopRequireDefault(_Collection2);

var _Container = require('./Container');

var _Container2 = _interopRequireDefault(_Container);

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 ElementCollection = function (_Collection) {
  _inherits(ElementCollection, _Collection);

  function ElementCollection(parent, settings) {
    _classCallCheck(this, ElementCollection);

    var _this = _possibleConstructorReturn(this, (ElementCollection.__proto__ || Object.getPrototypeOf(ElementCollection)).call(this));

    _this.parent = parent;
    _this.settings = settings;
    _this.focusedIndex = null;
    _this.eventAggregator = new _EventAggregator.EventAggregator();
    _this.lazyLoading = false;
    _this.onLazyLoad = null;
    return _this;
  }

  _createClass(ElementCollection, [{
    key: '_extendElement',
    value: function _extendElement(element) {
      element.parent = this.parent;

      //this.eventAggregator.dispatchEvent(`${EVENT_PREFIX}addElement`, item)
      //EA.dispatchEvent(`${EVENT_PREFIX}addElement`, this.parent)
    }
  }, {
    key: 'unshift',
    value: function unshift(element) {
      this._extendElement(element);
      _get(ElementCollection.prototype.__proto__ || Object.getPrototypeOf(ElementCollection.prototype), 'unshift', this).call(this, element);
      return element;
    }
  }, {
    key: 'push',
    value: function push(element) {
      this._extendElement(element);
      _get(ElementCollection.prototype.__proto__ || Object.getPrototypeOf(ElementCollection.prototype), 'push', this).call(this, element);
      return element;
    }
  }, {
    key: 'focus',
    value: function focus() {
      if (this.parent.constructor.name === 'Container' && !Boolean(this.length)) {
        throw Error('You must add at least one element to each container. Check ' + this.parent.name + ' container');
      }

      var elementIndex = void 0;

      if (this.focusedIndex === null) {
        this.focusedIndex = elementIndex = 0;
      } else {
        // TODO this is never used!
        switch (this.enterTo) {
          case 'first':
            elementIndex = 0;
            break;
          case 'last':
            elementIndex = this.length - 1;
            break;
          default:
            elementIndex = this.focusedIndex;
            break;
        }
      }

      var element = this.getByIndex(elementIndex);

      element.focus();
    }
  }, {
    key: 'getIndex',
    value: function getIndex(element) {
      return this.indexOf(element);
    }
  }, {
    key: 'setFocusedIndex',
    value: function setFocusedIndex(element) {
      this.focusedIndex = this.getIndex(element);
    }
  }, {
    key: 'lazyLoad',
    value: function lazyLoad() {
      var _this2 = this;

      if (typeof this.onLazyLoad !== 'function' || this.lazyLoading) {
        return;
      }

      this.lazyLoading = true;

      this.onLazyLoad(function () {
        _this2.lazyLoading = false;
      });
    }
  }, {
    key: 'subscribeLazyLoad',
    value: function subscribeLazyLoad(requestWrapper) {
      this.onLazyLoad = requestWrapper;
    }
  }]);

  return ElementCollection;
}(_Collection3.default);

exports.default = ElementCollection;
module.exports = exports['default'];