carbon-components/es/components/overflow-menu/overflow-menu.js

Carbon Components is a component library for IBM Cloud

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; }; }();

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; }

import settings from '../../globals/js/settings';
import mixin from '../../globals/js/misc/mixin';
import createComponent from '../../globals/js/mixins/create-component';
import initComponentBySearch from '../../globals/js/mixins/init-component-by-search';
import eventedShowHideState from '../../globals/js/mixins/evented-show-hide-state';
import handles from '../../globals/js/mixins/handles';
import FloatingMenu from '../floating-menu/floating-menu';
import getLaunchingDetails from '../../globals/js/misc/get-launching-details';
import on from '../../globals/js/misc/on';

var OverflowMenu = function (_mixin) {
  _inherits(OverflowMenu, _mixin);

  /**
   * Overflow menu.
   * @extends CreateComponent
   * @extends InitComponentBySearch
   * @extends Handles
   * @param {HTMLElement} element The element working as a modal dialog.
   * @param {Object} [options] The component options.
   * @param {string} [options.selectorOptionMenu] The CSS selector to find the menu.
   * @param {string} [options.classShown] The CSS class for the shown state, for the trigger UI.
   * @param {string} [options.classMenuShown] The CSS class for the shown state, for the menu.
   * @param {string} [options.classMenuFlip] The CSS class for the flipped state of the menu.
   * @param {Object} [options.objMenuOffset] The offset locating the menu for the non-flipped state.
   * @param {Object} [options.objMenuOffsetFlip] The offset locating the menu for the flipped state.
   */
  function OverflowMenu(element, options) {
    _classCallCheck(this, OverflowMenu);

    var _this = _possibleConstructorReturn(this, (OverflowMenu.__proto__ || Object.getPrototypeOf(OverflowMenu)).call(this, element, options));

    _this.manage(on(_this.element.ownerDocument, 'click', function (event) {
      _this._handleDocumentClick(event);
      _this.wasOpenBeforeClick = undefined;
    }));
    _this.manage(on(_this.element.ownerDocument, 'keypress', function (event) {
      _this._handleKeyPress(event);
    }));
    _this.manage(on(_this.element, 'mousedown', function () {
      _this.wasOpenBeforeClick = element.classList.contains(_this.options.classShown);
    }));
    return _this;
  }

  /**
   * Changes the shown/hidden state.
   * @param {string} state The new state.
   * @param {Object} detail The detail of the event trigging this action.
   * @param {Function} callback Callback called when change in state completes.
   */


  _createClass(OverflowMenu, [{
    key: 'changeState',
    value: function changeState(state, detail, callback) {
      if (!this.optionMenu) {
        var optionMenu = this.element.querySelector(this.options.selectorOptionMenu);
        if (!optionMenu) {
          throw new Error('Cannot find the target menu.');
        }

        // Lazily create a component instance for menu
        this.optionMenu = FloatingMenu.create(optionMenu, {
          refNode: this.element,
          classShown: this.options.classMenuShown,
          classRefShown: this.options.classShown,
          offset: this.options.objMenuOffset
        });
        this.children.push(this.optionMenu);
      }
      if (this.optionMenu.element.classList.contains(this.options.classMenuFlip)) {
        this.optionMenu.options.offset = this.options.objMenuOffsetFlip;
      }

      // Delegates the action of changing state to the menu.
      // (And thus the before/after shown/hidden events are fired from the menu)
      this.optionMenu.changeState(state, Object.assign(detail, { delegatorNode: this.element }), callback);
    }

    /**
     * Handles click on document.
     * @param {Event} event The triggering event.
     * @private
     */

  }, {
    key: '_handleDocumentClick',
    value: function _handleDocumentClick(event) {
      var element = this.element;
      var isOfSelf = element.contains(event.target);
      var shouldBeOpen = isOfSelf && !this.wasOpenBeforeClick;
      var state = shouldBeOpen ? 'shown' : 'hidden';

      if (isOfSelf) {
        if (element.tagName === 'A') {
          event.preventDefault();
        }
        event.delegateTarget = element; // eslint-disable-line no-param-reassign
      }

      this.changeState(state, getLaunchingDetails(event));
    }

    /**
     * Handles key press on document.
     * @param {Event} event The triggering event.
     * @private
     */

  }, {
    key: '_handleKeyPress',
    value: function _handleKeyPress(event) {
      var key = event.which;
      if (key === 13) {
        var element = this.element;
        var isOfSelf = element.contains(event.target);
        var shouldBeOpen = isOfSelf && !element.classList.contains(this.options.classShown);
        var state = shouldBeOpen ? 'shown' : 'hidden';

        if (isOfSelf) {
          if (element.tagName === 'A') {
            event.preventDefault();
          }
          event.delegateTarget = element; // eslint-disable-line no-param-reassign
        }

        this.changeState(state, getLaunchingDetails(event));
      }
    }
  }], [{
    key: 'options',
    get: function get() {
      var prefix = settings.prefix;

      return {
        selectorInit: '[data-overflow-menu]',
        selectorOptionMenu: '.' + prefix + '--overflow-menu-options',
        classShown: prefix + '--overflow-menu--open',
        classMenuShown: prefix + '--overflow-menu-options--open',
        classMenuFlip: prefix + '--overflow-menu--flip',
        objMenuOffset: { top: 3, left: 61 },
        objMenuOffsetFlip: { top: 3, left: -61 }
      };
    }
  }]);

  return OverflowMenu;
}(mixin(createComponent, initComponentBySearch, eventedShowHideState, handles));

OverflowMenu.components = new WeakMap();


export default OverflowMenu;