346 lines
9.8 KiB
JavaScript
346 lines
9.8 KiB
JavaScript
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'use strict';
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import $ from 'jquery';
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import { Keyboard } from './foundation.util.keyboard';
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import { Nest } from './foundation.util.nest';
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import { GetYoDigits } from './foundation.core.utils';
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import { Plugin } from './foundation.core.plugin';
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/**
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* AccordionMenu module.
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* @module foundation.accordionMenu
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* @requires foundation.util.keyboard
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* @requires foundation.util.nest
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*/
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class AccordionMenu extends Plugin {
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/**
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* Creates a new instance of an accordion menu.
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* @class
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* @name AccordionMenu
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* @fires AccordionMenu#init
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* @param {jQuery} element - jQuery object to make into an accordion menu.
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* @param {Object} options - Overrides to the default plugin settings.
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*/
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_setup(element, options) {
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this.$element = element;
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this.options = $.extend({}, AccordionMenu.defaults, this.$element.data(), options);
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this.className = 'AccordionMenu'; // ie9 back compat
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this._init();
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Keyboard.register('AccordionMenu', {
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'ENTER': 'toggle',
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'SPACE': 'toggle',
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'ARROW_RIGHT': 'open',
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'ARROW_UP': 'up',
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'ARROW_DOWN': 'down',
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'ARROW_LEFT': 'close',
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'ESCAPE': 'closeAll'
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});
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}
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/**
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* Initializes the accordion menu by hiding all nested menus.
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* @private
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*/
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_init() {
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Nest.Feather(this.$element, 'accordion');
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var _this = this;
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this.$element.find('[data-submenu]').not('.is-active').slideUp(0);//.find('a').css('padding-left', '1rem');
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this.$element.attr({
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'role': 'tree',
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'aria-multiselectable': this.options.multiOpen
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});
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this.$menuLinks = this.$element.find('.is-accordion-submenu-parent');
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this.$menuLinks.each(function(){
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var linkId = this.id || GetYoDigits(6, 'acc-menu-link'),
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$elem = $(this),
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$sub = $elem.children('[data-submenu]'),
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subId = $sub[0].id || GetYoDigits(6, 'acc-menu'),
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isActive = $sub.hasClass('is-active');
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if(_this.options.parentLink) {
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let $anchor = $elem.children('a');
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$anchor.clone().prependTo($sub).wrap('<li data-is-parent-link class="is-submenu-parent-item is-submenu-item is-accordion-submenu-item"></li>');
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}
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if(_this.options.submenuToggle) {
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$elem.addClass('has-submenu-toggle');
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$elem.children('a').after('<button id="' + linkId + '" class="submenu-toggle" aria-controls="' + subId + '" aria-expanded="' + isActive + '" title="' + _this.options.submenuToggleText + '"><span class="submenu-toggle-text">' + _this.options.submenuToggleText + '</span></button>');
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} else {
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$elem.attr({
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'aria-controls': subId,
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'aria-expanded': isActive,
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'id': linkId
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});
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}
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$sub.attr({
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'aria-labelledby': linkId,
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'aria-hidden': !isActive,
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'role': 'group',
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'id': subId
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});
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});
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this.$element.find('li').attr({
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'role': 'treeitem'
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});
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var initPanes = this.$element.find('.is-active');
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if(initPanes.length){
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var _this = this;
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initPanes.each(function(){
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_this.down($(this));
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});
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}
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this._events();
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}
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/**
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* Adds event handlers for items within the menu.
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* @private
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*/
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_events() {
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var _this = this;
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this.$element.find('li').each(function() {
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var $submenu = $(this).children('[data-submenu]');
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if ($submenu.length) {
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if(_this.options.submenuToggle) {
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$(this).children('.submenu-toggle').off('click.zf.accordionMenu').on('click.zf.accordionMenu', function(e) {
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_this.toggle($submenu);
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});
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} else {
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$(this).children('a').off('click.zf.accordionMenu').on('click.zf.accordionMenu', function(e) {
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e.preventDefault();
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_this.toggle($submenu);
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});
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}
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}
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}).on('keydown.zf.accordionmenu', function(e){
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var $element = $(this),
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$elements = $element.parent('ul').children('li'),
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$prevElement,
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$nextElement,
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$target = $element.children('[data-submenu]');
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$elements.each(function(i) {
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if ($(this).is($element)) {
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$prevElement = $elements.eq(Math.max(0, i-1)).find('a').first();
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$nextElement = $elements.eq(Math.min(i+1, $elements.length-1)).find('a').first();
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if ($(this).children('[data-submenu]:visible').length) { // has open sub menu
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$nextElement = $element.find('li:first-child').find('a').first();
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}
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if ($(this).is(':first-child')) { // is first element of sub menu
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$prevElement = $element.parents('li').first().find('a').first();
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} else if ($prevElement.parents('li').first().children('[data-submenu]:visible').length) { // if previous element has open sub menu
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$prevElement = $prevElement.parents('li').find('li:last-child').find('a').first();
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}
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if ($(this).is(':last-child')) { // is last element of sub menu
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$nextElement = $element.parents('li').first().next('li').find('a').first();
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}
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return;
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}
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});
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Keyboard.handleKey(e, 'AccordionMenu', {
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open: function() {
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if ($target.is(':hidden')) {
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_this.down($target);
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$target.find('li').first().find('a').first().focus();
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}
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},
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close: function() {
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if ($target.length && !$target.is(':hidden')) { // close active sub of this item
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_this.up($target);
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} else if ($element.parent('[data-submenu]').length) { // close currently open sub
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_this.up($element.parent('[data-submenu]'));
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$element.parents('li').first().find('a').first().focus();
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}
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},
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up: function() {
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$prevElement.focus();
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return true;
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},
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down: function() {
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$nextElement.focus();
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return true;
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},
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toggle: function() {
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if (_this.options.submenuToggle) {
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return false;
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}
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if ($element.children('[data-submenu]').length) {
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_this.toggle($element.children('[data-submenu]'));
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return true;
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}
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},
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closeAll: function() {
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_this.hideAll();
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},
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handled: function(preventDefault) {
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if (preventDefault) {
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e.preventDefault();
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}
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e.stopImmediatePropagation();
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}
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});
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});//.attr('tabindex', 0);
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}
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/**
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* Closes all panes of the menu.
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* @function
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*/
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hideAll() {
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this.up(this.$element.find('[data-submenu]'));
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}
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/**
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* Opens all panes of the menu.
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* @function
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*/
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showAll() {
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this.down(this.$element.find('[data-submenu]'));
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}
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/**
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* Toggles the open/close state of a submenu.
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* @function
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* @param {jQuery} $target - the submenu to toggle
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*/
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toggle($target){
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if(!$target.is(':animated')) {
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if (!$target.is(':hidden')) {
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this.up($target);
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}
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else {
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this.down($target);
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}
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}
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}
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/**
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* Opens the sub-menu defined by `$target`.
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* @param {jQuery} $target - Sub-menu to open.
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* @fires AccordionMenu#down
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*/
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down($target) {
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if(!this.options.multiOpen) {
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this.up(this.$element.find('.is-active').not($target.parentsUntil(this.$element).add($target)));
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}
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$target
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.addClass('is-active')
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.attr({ 'aria-hidden': false });
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if(this.options.submenuToggle) {
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$target.prev('.submenu-toggle').attr({'aria-expanded': true});
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}
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else {
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$target.parent('.is-accordion-submenu-parent').attr({'aria-expanded': true});
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}
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$target.slideDown(this.options.slideSpeed, () => {
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/**
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* Fires when the menu is done opening.
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* @event AccordionMenu#down
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*/
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this.$element.trigger('down.zf.accordionMenu', [$target]);
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});
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}
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/**
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* Closes the sub-menu defined by `$target`. All sub-menus inside the target will be closed as well.
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* @param {jQuery} $target - Sub-menu to close.
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* @fires AccordionMenu#up
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*/
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up($target) {
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const $submenus = $target.find('[data-submenu]');
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const $allmenus = $target.add($submenus);
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$submenus.slideUp(0);
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$allmenus
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.removeClass('is-active')
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.attr('aria-hidden', true);
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if(this.options.submenuToggle) {
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$allmenus.prev('.submenu-toggle').attr('aria-expanded', false);
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}
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else {
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$allmenus.parent('.is-accordion-submenu-parent').attr('aria-expanded', false);
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}
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$target.slideUp(this.options.slideSpeed, () => {
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/**
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* Fires when the menu is done collapsing up.
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* @event AccordionMenu#up
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*/
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this.$element.trigger('up.zf.accordionMenu', [$target]);
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});
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}
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/**
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* Destroys an instance of accordion menu.
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* @fires AccordionMenu#destroyed
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*/
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_destroy() {
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this.$element.find('[data-submenu]').slideDown(0).css('display', '');
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this.$element.find('a').off('click.zf.accordionMenu');
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this.$element.find('[data-is-parent-link]').detach();
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if(this.options.submenuToggle) {
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this.$element.find('.has-submenu-toggle').removeClass('has-submenu-toggle');
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this.$element.find('.submenu-toggle').remove();
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}
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Nest.Burn(this.$element, 'accordion');
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}
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}
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AccordionMenu.defaults = {
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/**
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* Adds the parent link to the submenu.
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* @option
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* @type {boolean}
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* @default false
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*/
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parentLink: false,
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/**
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* Amount of time to animate the opening of a submenu in ms.
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* @option
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* @type {number}
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* @default 250
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*/
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slideSpeed: 250,
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/**
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* Adds a separate submenu toggle button. This allows the parent item to have a link.
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* @option
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* @example true
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*/
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submenuToggle: false,
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/**
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* The text used for the submenu toggle if enabled. This is used for screen readers only.
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* @option
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* @example true
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*/
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submenuToggleText: 'Toggle menu',
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/**
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* Allow the menu to have multiple open panes.
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* @option
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* @type {boolean}
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* @default true
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*/
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multiOpen: true
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};
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export {AccordionMenu};
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