‘use strict’;

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props; 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 ($) {

/**
 * Drilldown module.
 * @module foundation.drilldown
 * @requires foundation.util.keyboard
 * @requires foundation.util.motion
 * @requires foundation.util.nest
 */

var Drilldown = function () {
  /**
   * Creates a new instance of a drilldown menu.
   * @class
   * @param {jQuery} element - jQuery object to make into an accordion menu.
   * @param {Object} options - Overrides to the default plugin settings.
   */
  function Drilldown(element, options) {
    _classCallCheck(this, Drilldown);

    this.$element = element;
    this.options = $.extend({}, Drilldown.defaults, this.$element.data(), options);

    Foundation.Nest.Feather(this.$element, 'drilldown');

    this._init();

    Foundation.registerPlugin(this, 'Drilldown');
    Foundation.Keyboard.register('Drilldown', {
      'ENTER': 'open',
      'SPACE': 'open',
      'ARROW_RIGHT': 'next',
      'ARROW_UP': 'up',
      'ARROW_DOWN': 'down',
      'ARROW_LEFT': 'previous',
      'ESCAPE': 'close',
      'TAB': 'down',
      'SHIFT_TAB': 'up'
    });
  }

  /**
   * Initializes the drilldown by creating jQuery collections of elements
   * @private
   */

  _createClass(Drilldown, [{
    key: '_init',
    value: function _init() {
      this.$submenuAnchors = this.$element.find('li.is-drilldown-submenu-parent').children('a');
      this.$submenus = this.$submenuAnchors.parent('li').children('[data-submenu]');
      this.$menuItems = this.$element.find('li').not('.js-drilldown-back').attr('role', 'menuitem').find('a');
      this.$element.attr('data-mutate', this.$element.attr('data-drilldown') || Foundation.GetYoDigits(6, 'drilldown'));

      this._prepareMenu();
      this._registerEvents();

      this._keyboardEvents();
    }

    /**
     * prepares drilldown menu by setting attributes to links and elements
     * sets a min height to prevent content jumping
     * wraps the element if not already wrapped
     * @private
     * @function
     */

  }, {
    key: '_prepareMenu',
    value: function _prepareMenu() {
      var _this = this;
      // if(!this.options.holdOpen){
      //   this._menuLinkEvents();
      // }
      this.$submenuAnchors.each(function () {
        var $link = $(this);
        var $sub = $link.parent();
        if (_this.options.parentLink) {
          $link.clone().prependTo($sub.children('[data-submenu]')).wrap('<li class="is-submenu-parent-item is-submenu-item is-drilldown-submenu-item" role="menu-item"></li>');
        }
        $link.data('savedHref', $link.attr('href')).removeAttr('href').attr('tabindex', 0);
        $link.children('[data-submenu]').attr({
          'aria-hidden': true,
          'tabindex': 0,
          'role': 'menu'
        });
        _this._events($link);
      });
      this.$submenus.each(function () {
        var $menu = $(this),
            $back = $menu.find('.js-drilldown-back');
        if (!$back.length) {
          switch (_this.options.backButtonPosition) {
            case "bottom":
              $menu.append(_this.options.backButton);
              break;
            case "top":
              $menu.prepend(_this.options.backButton);
              break;
            default:
              console.error("Unsupported backButtonPosition value '" + _this.options.backButtonPosition + "'");
          }
        }
        _this._back($menu);
      });

      this.$submenus.addClass('invisible');
      if (!this.options.autoHeight) {
        this.$submenus.addClass('drilldown-submenu-cover-previous');
      }

      // create a wrapper on element if it doesn't exist.
      if (!this.$element.parent().hasClass('is-drilldown')) {
        this.$wrapper = $(this.options.wrapper).addClass('is-drilldown');
        if (this.options.animateHeight) this.$wrapper.addClass('animate-height');
        this.$element.wrap(this.$wrapper);
      }
      // set wrapper
      this.$wrapper = this.$element.parent();
      this.$wrapper.css(this._getMaxDims());
    }
  }, {
    key: '_resize',
    value: function _resize() {
      this.$wrapper.css({ 'max-width': 'none', 'min-height': 'none' });
      // _getMaxDims has side effects (boo) but calling it should update all other necessary heights & widths
      this.$wrapper.css(this._getMaxDims());
    }

    /**
     * Adds event handlers to elements in the menu.
     * @function
     * @private
     * @param {jQuery} $elem - the current menu item to add handlers to.
     */

  }, {
    key: '_events',
    value: function _events($elem) {
      var _this = this;

      $elem.off('click.zf.drilldown').on('click.zf.drilldown', function (e) {
        if ($(e.target).parentsUntil('ul', 'li').hasClass('is-drilldown-submenu-parent')) {
          e.stopImmediatePropagation();
          e.preventDefault();
        }

        // if(e.target !== e.currentTarget.firstElementChild){
        //   return false;
        // }
        _this._show($elem.parent('li'));

        if (_this.options.closeOnClick) {
          var $body = $('body');
          $body.off('.zf.drilldown').on('click.zf.drilldown', function (e) {
            if (e.target === _this.$element[0] || $.contains(_this.$element[0], e.target)) {
              return;
            }
            e.preventDefault();
            _this._hideAll();
            $body.off('.zf.drilldown');
          });
        }
      });
      this.$element.on('mutateme.zf.trigger', this._resize.bind(this));
    }

    /**
     * Adds event handlers to the menu element.
     * @function
     * @private
     */

  }, {
    key: '_registerEvents',
    value: function _registerEvents() {
      if (this.options.scrollTop) {
        this._bindHandler = this._scrollTop.bind(this);
        this.$element.on('open.zf.drilldown hide.zf.drilldown closed.zf.drilldown', this._bindHandler);
      }
    }

    /**
     * Scroll to Top of Element or data-scroll-top-element
     * @function
     * @fires Drilldown#scrollme
     */

  }, {
    key: '_scrollTop',
    value: function _scrollTop() {
      var _this = this;
      var $scrollTopElement = _this.options.scrollTopElement != '' ? $(_this.options.scrollTopElement) : _this.$element,
          scrollPos = parseInt($scrollTopElement.offset().top + _this.options.scrollTopOffset);
      $('html, body').stop(true).animate({ scrollTop: scrollPos }, _this.options.animationDuration, _this.options.animationEasing, function () {
        /**
          * Fires after the menu has scrolled
          * @event Drilldown#scrollme
          */
        if (this === $('html')[0]) _this.$element.trigger('scrollme.zf.drilldown');
      });
    }

    /**
     * Adds keydown event listener to `li`'s in the menu.
     * @private
     */

  }, {
    key: '_keyboardEvents',
    value: function _keyboardEvents() {
      var _this = this;

      this.$menuItems.add(this.$element.find('.js-drilldown-back > a, .is-submenu-parent-item > a')).on('keydown.zf.drilldown', function (e) {
        var $element = $(this),
            $elements = $element.parent('li').parent('ul').children('li').children('a'),
            $prevElement,
            $nextElement;

        $elements.each(function (i) {
          if ($(this).is($element)) {
            $prevElement = $elements.eq(Math.max(0, i - 1));
            $nextElement = $elements.eq(Math.min(i + 1, $elements.length - 1));
            return;
          }
        });

        Foundation.Keyboard.handleKey(e, 'Drilldown', {
          next: function () {
            if ($element.is(_this.$submenuAnchors)) {
              _this._show($element.parent('li'));
              $element.parent('li').one(Foundation.transitionend($element), function () {
                $element.parent('li').find('ul li a').filter(_this.$menuItems).first().focus();
              });
              return true;
            }
          },
          previous: function () {
            _this._hide($element.parent('li').parent('ul'));
            $element.parent('li').parent('ul').one(Foundation.transitionend($element), function () {
              setTimeout(function () {
                $element.parent('li').parent('ul').parent('li').children('a').first().focus();
              }, 1);
            });
            return true;
          },
          up: function () {
            $prevElement.focus();
            // Don't tap focus on first element in root ul
            return !$element.is(_this.$element.find('> li:first-child > a'));
          },
          down: function () {
            $nextElement.focus();
            // Don't tap focus on last element in root ul
            return !$element.is(_this.$element.find('> li:last-child > a'));
          },
          close: function () {
            // Don't close on element in root ul
            if (!$element.is(_this.$element.find('> li > a'))) {
              _this._hide($element.parent().parent());
              $element.parent().parent().siblings('a').focus();
            }
          },
          open: function () {
            if (!$element.is(_this.$menuItems)) {
              // not menu item means back button
              _this._hide($element.parent('li').parent('ul'));
              $element.parent('li').parent('ul').one(Foundation.transitionend($element), function () {
                setTimeout(function () {
                  $element.parent('li').parent('ul').parent('li').children('a').first().focus();
                }, 1);
              });
              return true;
            } else if ($element.is(_this.$submenuAnchors)) {
              _this._show($element.parent('li'));
              $element.parent('li').one(Foundation.transitionend($element), function () {
                $element.parent('li').find('ul li a').filter(_this.$menuItems).first().focus();
              });
              return true;
            }
          },
          handled: function (preventDefault) {
            if (preventDefault) {
              e.preventDefault();
            }
            e.stopImmediatePropagation();
          }
        });
      }); // end keyboardAccess
    }

    /**
     * Closes all open elements, and returns to root menu.
     * @function
     * @fires Drilldown#closed
     */

  }, {
    key: '_hideAll',
    value: function _hideAll() {
      var $elem = this.$element.find('.is-drilldown-submenu.is-active').addClass('is-closing');
      if (this.options.autoHeight) this.$wrapper.css({ height: $elem.parent().closest('ul').data('calcHeight') });
      $elem.one(Foundation.transitionend($elem), function (e) {
        $elem.removeClass('is-active is-closing');
      });
      /**
       * Fires when the menu is fully closed.
       * @event Drilldown#closed
       */
      this.$element.trigger('closed.zf.drilldown');
    }

    /**
     * Adds event listener for each `back` button, and closes open menus.
     * @function
     * @fires Drilldown#back
     * @param {jQuery} $elem - the current sub-menu to add `back` event.
     */

  }, {
    key: '_back',
    value: function _back($elem) {
      var _this = this;
      $elem.off('click.zf.drilldown');
      $elem.children('.js-drilldown-back').on('click.zf.drilldown', function (e) {
        e.stopImmediatePropagation();
        // console.log('mouseup on back');
        _this._hide($elem);

        // If there is a parent submenu, call show
        var parentSubMenu = $elem.parent('li').parent('ul').parent('li');
        if (parentSubMenu.length) {
          _this._show(parentSubMenu);
        }
      });
    }

    /**
     * Adds event listener to menu items w/o submenus to close open menus on click.
     * @function
     * @private
     */

  }, {
    key: '_menuLinkEvents',
    value: function _menuLinkEvents() {
      var _this = this;
      this.$menuItems.not('.is-drilldown-submenu-parent').off('click.zf.drilldown').on('click.zf.drilldown', function (e) {
        // e.stopImmediatePropagation();
        setTimeout(function () {
          _this._hideAll();
        }, 0);
      });
    }

    /**
     * Opens a submenu.
     * @function
     * @fires Drilldown#open
     * @param {jQuery} $elem - the current element with a submenu to open, i.e. the `li` tag.
     */

  }, {
    key: '_show',
    value: function _show($elem) {
      if (this.options.autoHeight) this.$wrapper.css({ height: $elem.children('[data-submenu]').data('calcHeight') });
      $elem.attr('aria-expanded', true);
      $elem.children('[data-submenu]').addClass('is-active').removeClass('invisible').attr('aria-hidden', false);
      /**
       * Fires when the submenu has opened.
       * @event Drilldown#open
       */
      this.$element.trigger('open.zf.drilldown', [$elem]);
    }
  }, {
    key: '_hide',

    /**
     * Hides a submenu
     * @function
     * @fires Drilldown#hide
     * @param {jQuery} $elem - the current sub-menu to hide, i.e. the `ul` tag.
     */
    value: function _hide($elem) {
      if (this.options.autoHeight) this.$wrapper.css({ height: $elem.parent().closest('ul').data('calcHeight') });
      var _this = this;
      $elem.parent('li').attr('aria-expanded', false);
      $elem.attr('aria-hidden', true).addClass('is-closing');
      $elem.addClass('is-closing').one(Foundation.transitionend($elem), function () {
        $elem.removeClass('is-active is-closing');
        $elem.blur().addClass('invisible');
      });
      /**
       * Fires when the submenu has closed.
       * @event Drilldown#hide
       */
      $elem.trigger('hide.zf.drilldown', [$elem]);
    }

    /**
     * Iterates through the nested menus to calculate the min-height, and max-width for the menu.
     * Prevents content jumping.
     * @function
     * @private
     */

  }, {
    key: '_getMaxDims',
    value: function _getMaxDims() {
      var maxHeight = 0,
          result = {},
          _this = this;
      this.$submenus.add(this.$element).each(function () {
        var numOfElems = $(this).children('li').length;
        var height = Foundation.Box.GetDimensions(this).height;
        maxHeight = height > maxHeight ? height : maxHeight;
        if (_this.options.autoHeight) {
          $(this).data('calcHeight', height);
          if (!$(this).hasClass('is-drilldown-submenu')) result['height'] = height;
        }
      });

      if (!this.options.autoHeight) result['min-height'] = maxHeight + 'px';

      result['max-width'] = this.$element[0].getBoundingClientRect().width + 'px';

      return result;
    }

    /**
     * Destroys the Drilldown Menu
     * @function
     */

  }, {
    key: 'destroy',
    value: function destroy() {
      if (this.options.scrollTop) this.$element.off('.zf.drilldown', this._bindHandler);
      this._hideAll();
      this.$element.off('mutateme.zf.trigger');
      Foundation.Nest.Burn(this.$element, 'drilldown');
      this.$element.unwrap().find('.js-drilldown-back, .is-submenu-parent-item').remove().end().find('.is-active, .is-closing, .is-drilldown-submenu').removeClass('is-active is-closing is-drilldown-submenu').end().find('[data-submenu]').removeAttr('aria-hidden tabindex role');
      this.$submenuAnchors.each(function () {
        $(this).off('.zf.drilldown');
      });

      this.$submenus.removeClass('drilldown-submenu-cover-previous');

      this.$element.find('a').each(function () {
        var $link = $(this);
        $link.removeAttr('tabindex');
        if ($link.data('savedHref')) {
          $link.attr('href', $link.data('savedHref')).removeData('savedHref');
        } else {
          return;
        }
      });
      Foundation.unregisterPlugin(this);
    }
  }]);

  return Drilldown;
}();

Drilldown.defaults = {
  /**
   * Markup used for JS generated back button. Prepended  or appended (see backButtonPosition) to submenu lists and deleted on `destroy` method, 'js-drilldown-back' class required. Remove the backslash (`\`) if copy and pasting.
   * @option
   * @type {string}
   * @default '<li class="js-drilldown-back"><a tabindex="0">Back</a></li>'
   */
  backButton: '<li class="js-drilldown-back"><a tabindex="0">Back</a></li>',
  /**
   * Position the back button either at the top or bottom of drilldown submenus. Can be `'left'` or `'bottom'`.
   * @option
   * @type {string}
   * @default top
   */
  backButtonPosition: 'top',
  /**
   * Markup used to wrap drilldown menu. Use a class name for independent styling; the JS applied class: `is-drilldown` is required. Remove the backslash (`\`) if copy and pasting.
   * @option
   * @type {string}
   * @default '<div></div>'
   */
  wrapper: '<div></div>',
  /**
   * Adds the parent link to the submenu.
   * @option
   * @type {boolean}
   * @default false
   */
  parentLink: false,
  /**
   * Allow the menu to return to root list on body click.
   * @option
   * @type {boolean}
   * @default false
   */
  closeOnClick: false,
  /**
   * Allow the menu to auto adjust height.
   * @option
   * @type {boolean}
   * @default false
   */
  autoHeight: false,
  /**
   * Animate the auto adjust height.
   * @option
   * @type {boolean}
   * @default false
   */
  animateHeight: false,
  /**
   * Scroll to the top of the menu after opening a submenu or navigating back using the menu back button
   * @option
   * @type {boolean}
   * @default false
   */
  scrollTop: false,
  /**
   * String jquery selector (for example 'body') of element to take offset().top from, if empty string the drilldown menu offset().top is taken
   * @option
   * @type {string}
   * @default ''
   */
  scrollTopElement: '',
  /**
   * ScrollTop offset
   * @option
   * @type {number}
   * @default 0
   */
  scrollTopOffset: 0,
  /**
   * Scroll animation duration
   * @option
   * @type {number}
   * @default 500
   */
  animationDuration: 500,
  /**
   * Scroll animation easing. Can be `'swing'` or `'linear'`.
   * @option
   * @type {string}
   * @see {@link https://api.jquery.com/animate|JQuery animate}
   * @default 'swing'
   */
  animationEasing: 'swing'
  // holdOpen: false
};

// Window exports
Foundation.plugin(Drilldown, 'Drilldown');

}(jQuery);