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from 'jquery';\nimport { Keyboard } from './foundation.util.keyboard';\nimport { Nest } from './foundation.util.nest';\nimport { GetYoDigits, transitionend } from './foundation.core.utils';\nimport { Box } from './foundation.util.box';\nimport { Plugin } from './foundation.core.plugin';\n\n/**\n * Drilldown module.\n * @module foundation.drilldown\n * @requires foundation.util.keyboard\n * @requires foundation.util.nest\n * @requires foundation.util.box\n */\n\nclass Drilldown extends Plugin {\n /**\n * Creates a new instance of a drilldown menu.\n * @class\n * @name Drilldown\n * @param {jQuery} element - jQuery object to make into an accordion menu.\n * @param {Object} options - Overrides to the default plugin settings.\n */\n _setup(element, options) {\n this.$element = element;\n this.options = $.extend({}, Drilldown.defaults, this.$element.data(), options);\n this.className = 'Drilldown'; // ie9 back compat\n\n this._init();\n\n Keyboard.register('Drilldown', {\n 'ENTER': 'open',\n 'SPACE': 'open',\n 'ARROW_RIGHT': 'next',\n 'ARROW_UP': 'up',\n 'ARROW_DOWN': 'down',\n 'ARROW_LEFT': 'previous',\n 'ESCAPE': 'close',\n 'TAB': 'down',\n 'SHIFT_TAB': 'up'\n });\n }\n\n /**\n * Initializes the drilldown by creating jQuery collections of elements\n * @private\n */\n _init() {\n Nest.Feather(this.$element, 'drilldown');\n\n if(this.options.autoApplyClass) {\n this.$element.addClass('drilldown');\n }\n\n this.$element.attr({\n 'role': 'tree',\n 'aria-multiselectable': false\n });\n this.$submenuAnchors = this.$element.find('li.is-drilldown-submenu-parent').children('a');\n this.$submenus = this.$submenuAnchors.parent('li').children('[data-submenu]').attr('role', 'group');\n this.$menuItems = this.$element.find('li').not('.js-drilldown-back').attr('role', 'treeitem').find('a');\n\n // Set the main menu as current by default (unless a submenu is selected)\n // Used to set the wrapper height when the drilldown is closed/reopened from any (sub)menu\n this.$currentMenu = this.$element;\n\n this.$element.attr('data-mutate', (this.$element.attr('data-drilldown') || GetYoDigits(6, 'drilldown')));\n\n this._prepareMenu();\n this._registerEvents();\n\n this._keyboardEvents();\n }\n\n /**\n * prepares drilldown menu by setting attributes to links and elements\n * sets a min height to prevent content jumping\n * wraps the element if not already wrapped\n * @private\n * @function\n */\n _prepareMenu() {\n var _this = this;\n // if(!this.options.holdOpen){\n // this._menuLinkEvents();\n // }\n this.$submenuAnchors.each(function(){\n var $link = $(this);\n var $sub = $link.parent();\n if(_this.options.parentLink){\n $link.clone().prependTo($sub.children('[data-submenu]')).wrap('<li data-is-parent-link class=\"is-submenu-parent-item is-submenu-item is-drilldown-submenu-item\" role=\"none\"></li>');\n }\n $link.data('savedHref', $link.attr('href')).removeAttr('href').attr('tabindex', 0);\n $link.children('[data-submenu]')\n .attr({\n 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wrapper\n this.$wrapper = this.$element.parent();\n this.$wrapper.css(this._getMaxDims());\n }\n\n _resize() {\n this.$wrapper.css({'max-width': 'none', 'min-height': 'none'});\n // _getMaxDims has side effects (boo) but calling it should update all other necessary heights & widths\n this.$wrapper.css(this._getMaxDims());\n }\n\n /**\n * Adds event handlers to elements in the menu.\n * @function\n * @private\n * @param {jQuery} $elem - the current menu item to add handlers to.\n */\n _events($elem) {\n var _this = this;\n\n $elem.off('click.zf.drilldown')\n .on('click.zf.drilldown', function(e){\n if($(e.target).parentsUntil('ul', 'li').hasClass('is-drilldown-submenu-parent')){\n e.preventDefault();\n }\n\n // if(e.target !== e.currentTarget.firstElementChild){\n // return false;\n // }\n _this._show($elem.parent('li'));\n\n if(_this.options.closeOnClick){\n var $body = $('body');\n $body.off('.zf.drilldown').on('click.zf.drilldown', function(e){\n if (e.target === _this.$element[0] || $.contains(_this.$element[0], e.target)) { return; }\n e.preventDefault();\n _this._hideAll();\n $body.off('.zf.drilldown');\n });\n }\n });\n }\n\n /**\n * Adds event handlers to the menu element.\n * @function\n * @private\n */\n _registerEvents() {\n if(this.options.scrollTop){\n this._bindHandler = this._scrollTop.bind(this);\n this.$element.on('open.zf.drilldown hide.zf.drilldown close.zf.drilldown closed.zf.drilldown',this._bindHandler);\n }\n this.$element.on('mutateme.zf.trigger', this._resize.bind(this));\n }\n\n /**\n * Scroll to Top of Element or data-scroll-top-element\n * @function\n * @fires Drilldown#scrollme\n */\n _scrollTop() {\n var _this = this;\n var $scrollTopElement = _this.options.scrollTopElement!=''?$(_this.options.scrollTopElement):_this.$element,\n scrollPos = parseInt($scrollTopElement.offset().top+_this.options.scrollTopOffset, 10);\n $('html, body').stop(true).animate({ scrollTop: scrollPos }, _this.options.animationDuration, _this.options.animationEasing,function(){\n /**\n * Fires after the menu has scrolled\n * @event Drilldown#scrollme\n */\n if(this===$('html')[0])_this.$element.trigger('scrollme.zf.drilldown');\n });\n }\n\n /**\n * Adds keydown event listener to `li`'s in the menu.\n * @private\n */\n _keyboardEvents() {\n var _this = this;\n\n this.$menuItems.add(this.$element.find('.js-drilldown-back > a, .is-submenu-parent-item > a')).on('keydown.zf.drilldown', function(e){\n var $element = $(this),\n $elements = $element.parent('li').parent('ul').children('li').children('a'),\n $prevElement,\n $nextElement;\n\n $elements.each(function(i) {\n if ($(this).is($element)) {\n $prevElement = $elements.eq(Math.max(0, i-1));\n $nextElement = $elements.eq(Math.min(i+1, $elements.length-1));\n return;\n }\n });\n\n Keyboard.handleKey(e, 'Drilldown', {\n next: function() {\n if ($element.is(_this.$submenuAnchors)) {\n _this._show($element.parent('li'));\n $element.parent('li').one(transitionend($element), 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(_this.options.parentLink && $element.attr('href')) { // Link with href\n return false;\n } else if (!$element.is(_this.$menuItems)) { // not menu item means back button\n _this._hide($element.parent('li').parent('ul'));\n $element.parent('li').parent('ul').one(transitionend($element), function(){\n setTimeout(function() {\n $element.parent('li').parent('ul').parent('li').children('a').first().focus();\n }, 1);\n });\n return true;\n } else if ($element.is(_this.$submenuAnchors)) { // Sub menu item\n _this._show($element.parent('li'));\n $element.parent('li').one(transitionend($element), function(){\n $element.parent('li').find('ul li a').not('.js-drilldown-back a').first().focus();\n });\n return true;\n }\n },\n handled: function(preventDefault) {\n if (preventDefault) {\n e.preventDefault();\n }\n }\n });\n }); // end keyboardAccess\n }\n\n /**\n * Closes all open elements, and returns to root menu.\n * @function\n * @fires Drilldown#close\n * @fires Drilldown#closed\n */\n 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back');\n _this._hide($elem);\n\n // If there is a parent submenu, call show\n let parentSubMenu = $elem.parent('li').parent('ul').parent('li');\n if (parentSubMenu.length) {\n _this._show(parentSubMenu);\n }\n });\n }\n\n /**\n * Adds event listener to menu items w/o submenus to close open menus on click.\n * @function\n * @private\n */\n _menuLinkEvents() {\n var _this = this;\n this.$menuItems.not('.is-drilldown-submenu-parent')\n .off('click.zf.drilldown')\n .on('click.zf.drilldown', function(e){\n setTimeout(function(){\n _this._hideAll();\n }, 0);\n });\n }\n\n /**\n * Sets the CSS classes for submenu to show it.\n * @function\n * @private\n * @param {jQuery} $elem - the target submenu (`ul` tag)\n * @param {boolean} trigger - trigger drilldown event\n */\n _setShowSubMenuClasses($elem, trigger) {\n $elem.addClass('is-active').removeClass('invisible').attr('aria-hidden', false);\n $elem.parent('li').attr('aria-expanded', true);\n if (trigger === true) {\n this.$element.trigger('open.zf.drilldown', [$elem]);\n }\n }\n\n /**\n * Sets the CSS classes for submenu to hide it.\n * @function\n * @private\n * @param {jQuery} $elem - the target submenu (`ul` tag)\n * @param {boolean} trigger - trigger drilldown event\n */\n _setHideSubMenuClasses($elem, trigger) {\n $elem.removeClass('is-active').addClass('invisible').attr('aria-hidden', true);\n $elem.parent('li').attr('aria-expanded', false);\n if (trigger === true) {\n $elem.trigger('hide.zf.drilldown', [$elem]);\n }\n }\n\n /**\n * Opens a specific drilldown (sub)menu no matter which (sub)menu in it is currently visible.\n * Compared to _show() this lets you jump into any submenu without clicking through every submenu on the way to it.\n * @function\n * @fires Drilldown#open\n * @param {jQuery} $elem - the target (sub)menu (`ul` tag)\n * @param {boolean} autoFocus - if true the first link in the target (sub)menu gets auto focused\n */\n _showMenu($elem, autoFocus) {\n\n var _this = this;\n\n // Reset drilldown\n var $expandedSubmenus = this.$element.find('li[aria-expanded=\"true\"] > ul[data-submenu]');\n $expandedSubmenus.each(function(index) {\n _this._setHideSubMenuClasses($(this));\n });\n\n // Save the menu as the currently displayed one.\n this.$currentMenu = $elem;\n\n // If target menu is root, focus first link & exit\n if ($elem.is('[data-drilldown]')) {\n if (autoFocus === true) $elem.find('li[role=\"treeitem\"] > a').first().focus();\n if (this.options.autoHeight) this.$wrapper.css('height', $elem.data('calcHeight'));\n return;\n }\n\n // Find all submenus on way to root incl. the element itself\n var $submenus = $elem.children().first().parentsUntil('[data-drilldown]', '[data-submenu]');\n\n // Open target menu and all submenus on its way to root\n $submenus.each(function(index) {\n\n // Update height of first child (target menu) if autoHeight option true\n if (index === 0 && _this.options.autoHeight) {\n _this.$wrapper.css('height', $(this).data('calcHeight'));\n }\n\n var isLastChild = index == $submenus.length - 1;\n\n // Add transitionsend listener to last child (root due to reverse order) to open target menu's first link\n // Last child makes sure the event gets always triggered even if going through several menus\n if (isLastChild === true) {\n $(this).one(transitionend($(this)), () => {\n if (autoFocus === true) {\n $elem.find('li[role=\"treeitem\"] > a').first().focus();\n }\n });\n }\n\n _this._setShowSubMenuClasses($(this), isLastChild);\n });\n }\n\n /**\n * Opens a submenu.\n * @function\n * @fires Drilldown#open\n * @param {jQuery} $elem - the current element with a submenu to open, i.e. the `li` tag.\n */\n _show($elem) {\n const $submenu = $elem.children('[data-submenu]');\n\n $elem.attr('aria-expanded', true);\n\n this.$currentMenu = $submenu;\n $submenu.addClass('is-active').removeClass('invisible').attr('aria-hidden', false);\n if (this.options.autoHeight) {\n this.$wrapper.css({ height: $submenu.data('calcHeight') });\n }\n\n /**\n * Fires when the submenu has opened.\n * @event Drilldown#open\n */\n this.$element.trigger('open.zf.drilldown', [$elem]);\n }\n\n /**\n * Hides a submenu\n * @function\n * @fires Drilldown#hide\n * @param {jQuery} $elem - the current sub-menu to hide, i.e. the `ul` tag.\n */\n _hide($elem) {\n if(this.options.autoHeight) this.$wrapper.css({height:$elem.parent().closest('ul').data('calcHeight')});\n var _this = this;\n $elem.parent('li').attr('aria-expanded', false);\n $elem.attr('aria-hidden', true);\n $elem.addClass('is-closing')\n .one(transitionend($elem), function(){\n $elem.removeClass('is-active is-closing');\n $elem.blur().addClass('invisible');\n });\n /**\n * Fires when the submenu has closed.\n * @event Drilldown#hide\n */\n $elem.trigger('hide.zf.drilldown', [$elem]);\n }\n\n /**\n * Iterates through the nested menus to calculate the min-height, and max-width for the menu.\n * Prevents content jumping.\n * @function\n * @private\n */\n _getMaxDims() {\n var maxHeight = 0, result = {}, _this = this;\n\n // Recalculate menu heights and total max height\n this.$submenus.add(this.$element).each(function(){\n var numOfElems = $(this).children('li').length;\n var height = Box.GetDimensions(this).height;\n\n maxHeight = height > maxHeight ? height : maxHeight;\n\n if(_this.options.autoHeight) {\n $(this).data('calcHeight',height);\n }\n });\n\n if (this.options.autoHeight)\n result['height'] = this.$currentMenu.data('calcHeight');\n else\n result['min-height'] = `${maxHeight}px`;\n\n result['max-width'] = `${this.$element[0].getBoundingClientRect().width}px`;\n\n return result;\n }\n\n /**\n * Destroys the Drilldown Menu\n * @function\n */\n _destroy() {\n if(this.options.scrollTop) this.$element.off('.zf.drilldown',this._bindHandler);\n this._hideAll();\n\t this.$element.off('mutateme.zf.trigger');\n Nest.Burn(this.$element, 'drilldown');\n this.$element.unwrap()\n .find('.js-drilldown-back, .is-submenu-parent-item').remove()\n .end().find('.is-active, .is-closing, .is-drilldown-submenu').removeClass('is-active is-closing is-drilldown-submenu')\n .end().find('[data-submenu]').removeAttr('aria-hidden tabindex role');\n this.$submenuAnchors.each(function() {\n $(this).off('.zf.drilldown');\n });\n\n this.$element.find('[data-is-parent-link]').detach();\n this.$submenus.removeClass('drilldown-submenu-cover-previous invisible');\n\n this.$element.find('a').each(function(){\n var $link = $(this);\n $link.removeAttr('tabindex');\n if($link.data('savedHref')){\n $link.attr('href', $link.data('savedHref')).removeData('savedHref');\n }else{ return; }\n });\n };\n}\n\nDrilldown.defaults = {\n /**\n * Drilldowns depend on styles in order to function properly; in the default build of Foundation these are\n * on the `drilldown` class. This option auto-applies this class to the drilldown upon initialization.\n * @option\n * @type {boolean}\n * @default true\n */\n autoApplyClass: true,\n /**\n * 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.\n * @option\n * @type {string}\n * @default '<li class=\"js-drilldown-back\"><a tabindex=\"0\">Back</a></li>'\n */\n backButton: '<li class=\"js-drilldown-back\"><a tabindex=\"0\">Back</a></li>',\n /**\n * Position the back button either at the top or bottom of drilldown submenus. Can be `'left'` or `'bottom'`.\n * @option\n * @type {string}\n * @default top\n */\n backButtonPosition: 'top',\n /**\n * 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.\n * @option\n * @type {string}\n * @default '<div></div>'\n */\n wrapper: '<div></div>',\n /**\n * Adds the parent link to the submenu.\n * @option\n * @type {boolean}\n * @default false\n */\n parentLink: false,\n /**\n * Allow the menu to return to root list on body click.\n * @option\n * @type {boolean}\n * @default false\n */\n closeOnClick: false,\n /**\n * Allow the menu to auto adjust height.\n * @option\n * @type {boolean}\n * @default false\n */\n autoHeight: false,\n /**\n * Animate the auto adjust height.\n * @option\n * @type {boolean}\n * @default false\n */\n animateHeight: false,\n /**\n * Scroll to the top of the menu after opening a submenu or navigating back using the menu back button\n * @option\n * @type {boolean}\n * @default false\n */\n scrollTop: false,\n /**\n * String jquery selector (for example 'body') of element to take offset().top from, if empty string the drilldown menu offset().top is taken\n * @option\n * @type {string}\n * @default ''\n */\n scrollTopElement: '',\n /**\n * ScrollTop offset\n * @option\n * @type {number}\n * @default 0\n */\n scrollTopOffset: 0,\n /**\n * Scroll animation duration\n * @option\n * @type {number}\n * @default 500\n */\n animationDuration: 500,\n /**\n * Scroll animation easing. Can be `'swing'` or `'linear'`.\n * @option\n * @type {string}\n * @see {@link https://api.jquery.com/animate|JQuery animate}\n * @default 'swing'\n */\n animationEasing: 'swing'\n // holdOpen: false\n};\n\nexport {Drilldown};\n","module.exports = __WEBPACK_EXTERNAL_MODULE_jquery__;"]} |