carbon-components/es/components/content-switcher/content-switcher.js

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  return Constructor;
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    constructor: {
      value: subClass,
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/**
 * Copyright IBM Corp. 2016, 2018
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */


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 eventedState from '../../globals/js/mixins/evented-state';
import handles from '../../globals/js/mixins/handles';
import eventMatches from '../../globals/js/misc/event-matches';
import on from '../../globals/js/misc/on';

var toArray = function toArray(arrayLike) {
  return Array.prototype.slice.call(arrayLike);
};

var ContentSwitcher =
/*#__PURE__*/
function (_mixin) {
  _inherits(ContentSwitcher, _mixin);
  /**
   * Set of content switcher buttons.
   * @extends CreateComponent
   * @extends InitComponentBySearch
   * @extends EventedState
   * @extends Handles
   * @param {HTMLElement} element The element working as a set of content switcher buttons.
   * @param {Object} [options] The component options.
   * @param {string} [options.selectorButton] The CSS selector to find switcher buttons.
   * @param {string} [options.selectorButtonSelected] The CSS selector to find the selected switcher button.
   * @param {string} [options.classActive] The CSS class for switcher button's selected state.
   * @param {string} [options.eventBeforeSelected]
   *   The name of the custom event fired before a switcher button is selected.
   *   Cancellation of this event stops selection of content switcher button.
   * @param {string} [options.eventAfterSelected] The name of the custom event fired after a switcher button is selected.
   */


  function ContentSwitcher(element, options) {
    var _this;

    _classCallCheck(this, ContentSwitcher);

    _this = _possibleConstructorReturn(this, _getPrototypeOf(ContentSwitcher).call(this, element, options));

    _this.manage(on(_this.element, 'click', function (event) {
      _this._handleClick(event);
    }));

    return _this;
  }
  /**
   * Handles click on content switcher button set.
   * If the click is on a content switcher button, activates it.
   * @param {Event} event The event triggering this method.
   */


  _createClass(ContentSwitcher, [{
    key: "_handleClick",
    value: function _handleClick(event) {
      var button = eventMatches(event, this.options.selectorButton);

      if (button) {
        this.changeState({
          group: 'selected',
          item: button,
          launchingEvent: event
        });
      }
    }
    /**
     * Internal method of {@linkcode ContentSwitcher#setActive .setActive()}, to select a content switcher button.
     * @private
     * @param {Object} detail The detail of the event trigging this action.
     * @param {HTMLElement} detail.item The button to be selected.
     * @param {Function} callback Callback called when change in state completes.
     */

  }, {
    key: "_changeState",
    value: function _changeState(_ref, callback) {
      var _this2 = this;

      var item = _ref.item; // `options.selectorLink` is not defined in this class itself, code here primary is for inherited classes

      var itemLink = item.querySelector(this.options.selectorLink);

      if (itemLink) {
        toArray(this.element.querySelectorAll(this.options.selectorLink)).forEach(function (link) {
          if (link !== itemLink) {
            link.setAttribute('aria-selected', 'false');
          }
        });
        itemLink.setAttribute('aria-selected', 'true');
      }

      var selectorButtons = toArray(this.element.querySelectorAll(this.options.selectorButton));
      selectorButtons.forEach(function (button) {
        if (button !== item) {
          button.setAttribute('aria-selected', false);
          button.classList.toggle(_this2.options.classActive, false);
          toArray(button.ownerDocument.querySelectorAll(button.dataset.target)).forEach(function (element) {
            element.setAttribute('hidden', '');
            element.setAttribute('aria-hidden', 'true');
          });
        }
      });
      item.classList.toggle(this.options.classActive, true);
      item.setAttribute('aria-selected', true);
      toArray(item.ownerDocument.querySelectorAll(item.dataset.target)).forEach(function (element) {
        element.removeAttribute('hidden');
        element.setAttribute('aria-hidden', 'false');
      });

      if (callback) {
        callback();
      }
    }
    /**
     * Selects a content switcher button.
     * If the selected button has `data-target` attribute, DOM elements it points to as a CSS selector will be shown.
     * DOM elements associated with unselected buttons in the same way will be hidden.
     * @param {HTMLElement} item The button to be selected.
     * @param {ChangeState~callback} callback The callback is called once selection is finished
     * or is canceled. Will only invoke callback if it's passed in.
     */

  }, {
    key: "setActive",
    value: function setActive(item, callback) {
      this.changeState({
        group: 'selected',
        item: item
      }, function (error) {
        if (error) {
          if (callback) {
            callback(Object.assign(error, {
              item: item
            }));
          }
        } else if (callback) {
          callback(null, item);
        }
      });
    }
    /**
     * The map associating DOM element and content switcher set instance.
     * @member ContentSwitcher.components
     * @type {WeakMap}
     */

  }], [{
    key: "options",

    /**
     * The component options.
     * If `options` is specified in the constructor,
     * {@linkcode ContentSwitcher.create .create()}, or {@linkcode ContentSwitcher.init .init()},
     * properties in this object are overriden for the instance being create and how {@linkcode ContentSwitcher.init .init()} works.
     * @member ContentSwitcher.options
     * @type {Object}
     * @property {string} selectorInit The CSS selector to find content switcher button set.
     * @property {string} [selectorButton] The CSS selector to find switcher buttons.
     * @property {string} [selectorButtonSelected] The CSS selector to find the selected switcher button.
     * @property {string} [classActive] The CSS class for switcher button's selected state.
     * @property {string} [eventBeforeSelected]
     *   The name of the custom event fired before a switcher button is selected.
     *   Cancellation of this event stops selection of content switcher button.
     * @property {string} [eventAfterSelected] The name of the custom event fired after a switcher button is selected.
     */
    get: function get() {
      var prefix = settings.prefix;
      return {
        selectorInit: '[data-content-switcher]',
        selectorButton: "input[type=\"radio\"], .".concat(prefix, "--content-switcher-btn"),
        classActive: "".concat(prefix, "--content-switcher--selected"),
        eventBeforeSelected: 'content-switcher-beingselected',
        eventAfterSelected: 'content-switcher-selected'
      };
    }
  }]);

  ContentSwitcher.components = new WeakMap();
  return ContentSwitcher;
}(mixin(createComponent, initComponentBySearch, eventedState, handles));

export default ContentSwitcher;