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Edit File : customize-nav-menus.js \| Size : 105.83 KB
/** * @output wp-admin/js/customize-nav-menus.js / / global _wpCustomizeNavMenusSettings, wpNavMenu, console / ( function( api, wp, $ ) { 'use strict'; /* * Set up wpNavMenu for drag and drop. / wpNavMenu.originalInit = wpNavMenu.init; wpNavMenu.options.menuItemDepthPerLevel = 20; wpNavMenu.options.sortableItems = '> .customize-control-nav_menu_item'; wpNavMenu.options.targetTolerance = 10; wpNavMenu.init = function() { this.jQueryExtensions(); }; /* * @namespace wp.customize.Menus / api.Menus = api.Menus \|\| {}; // Link settings. api.Menus.data = { itemTypes: [], l10n: {}, settingTransport: 'refresh', phpIntMax: 0, defaultSettingValues: { nav_menu: {}, nav_menu_item: {} }, locationSlugMappedToName: {} }; if ( 'undefined' !== typeof _wpCustomizeNavMenusSettings ) { $.extend( api.Menus.data, _wpCustomizeNavMenusSettings ); } /* * Newly-created Nav Menus and Nav Menu Items have negative integer IDs which * serve as placeholders until Save & Publish happens. * * @alias wp.customize.Menus.generatePlaceholderAutoIncrementId * * @return {number} / api.Menus.generatePlaceholderAutoIncrementId = function() { return -Math.ceil( api.Menus.data.phpIntMax Math.random() ); }; /** * wp.customize.Menus.AvailableItemModel * * A single available menu item model. See PHP's WP_Customize_Nav_Menu_Item_Setting class. * * @class wp.customize.Menus.AvailableItemModel * @augments Backbone.Model / api.Menus.AvailableItemModel = Backbone.Model.extend( $.extend( { id: null // This is only used by Backbone. }, api.Menus.data.defaultSettingValues.nav_menu_item ) ); /* * wp.customize.Menus.AvailableItemCollection * * Collection for available menu item models. * * @class wp.customize.Menus.AvailableItemCollection * @augments Backbone.Collection / api.Menus.AvailableItemCollection = Backbone.Collection.extend(/* @lends wp.customize.Menus.AvailableItemCollection.prototype /{ model: api.Menus.AvailableItemModel, sort_key: 'order', comparator: function( item ) { return -item.get( this.sort_key ); }, sortByField: function( fieldName ) { this.sort_key = fieldName; this.sort(); } }); api.Menus.availableMenuItems = new api.Menus.AvailableItemCollection( api.Menus.data.availableMenuItems ); /* * Insert a new `auto-draft` post. * * @since 4.7.0 * @alias wp.customize.Menus.insertAutoDraftPost * * @param {Object} params - Parameters for the draft post to create. * @param {string} params.post_type - Post type to add. * @param {string} params.post_title - Post title to use. * @return {jQuery.promise} Promise resolved with the added post. / api.Menus.insertAutoDraftPost = function insertAutoDraftPost( params ) { var request, deferred = $.Deferred(); request = wp.ajax.post( 'customize-nav-menus-insert-auto-draft', { 'customize-menus-nonce': api.settings.nonce['customize-menus'], 'wp_customize': 'on', 'customize_changeset_uuid': api.settings.changeset.uuid, 'params': params } ); request.done( function( response ) { if ( response.post_id ) { api( 'nav_menus_created_posts' ).set( api( 'nav_menus_created_posts' ).get().concat( [ response.post_id ] ) ); if ( 'page' === params.post_type ) { // Activate static front page controls as this could be the first page created. if ( api.section.has( 'static_front_page' ) ) { api.section( 'static_front_page' ).activate(); } // Add new page to dropdown-pages controls. api.control.each( function( control ) { var select; if ( 'dropdown-pages' === control.params.type ) { select = control.container.find( 'select[name^="_customize-dropdown-pages-"]' ); select.append( new Option( params.post_title, response.post_id ) ); } } ); } deferred.resolve( response ); } } ); request.fail( function( response ) { var error = response \|\| ''; if ( 'undefined' !== typeof response.message ) { error = response.message; } console.error( error ); deferred.rejectWith( error ); } ); return deferred.promise(); }; api.Menus.AvailableMenuItemsPanelView = wp.Backbone.View.extend(/* @lends wp.customize.Menus.AvailableMenuItemsPanelView.prototype /{ el: '#available-menu-items', events: { 'input #menu-items-search': 'debounceSearch', 'focus .menu-item-tpl': 'focus', 'click .menu-item-tpl': '_submit', 'click #custom-menu-item-submit': '_submitLink', 'keypress #custom-menu-item-name': '_submitLink', 'click .new-content-item .add-content': '_submitNew', 'keypress .create-item-input': '_submitNew', 'keydown': 'keyboardAccessible' }, // Cache current selected menu item. selected: null, // Cache menu control that opened the panel. currentMenuControl: null, debounceSearch: null, $search: null, $clearResults: null, searchTerm: '', rendered: false, pages: {}, sectionContent: '', loading: false, addingNew: false, /* * wp.customize.Menus.AvailableMenuItemsPanelView * * View class for the available menu items panel. * * @constructs wp.customize.Menus.AvailableMenuItemsPanelView * @augments wp.Backbone.View / initialize: function() { var self = this; if ( ! api.panel.has( 'nav_menus' ) ) { return; } this.$search = $( '#menu-items-search' ); this.$clearResults = this.$el.find( '.clear-results' ); this.sectionContent = this.$el.find( '.available-menu-items-list' ); this.debounceSearch = _.debounce( self.search, 500 ); _.bindAll( this, 'close' ); / * If the available menu items panel is open and the customize controls * are interacted with (other than an item being deleted), then close * the available menu items panel. Also close on back button click. / $( '#customize-controls, .customize-section-back' ).on( 'click keydown', function( e ) { var isDeleteBtn = $( e.target ).is( '.item-delete, .item-delete ' ), isAddNewBtn = $( e.target ).is( '.add-new-menu-item, .add-new-menu-item ' ); if ( $( 'body' ).hasClass( 'adding-menu-items' ) && ! isDeleteBtn && ! isAddNewBtn ) { self.close(); } } ); // Clear the search results and trigger an `input` event to fire a new search. this.$clearResults.on( 'click', function() { self.$search.val( '' ).focus().trigger( 'input' ); } ); this.$el.on( 'input', '#custom-menu-item-name.invalid, #custom-menu-item-url.invalid', function() { $( this ).removeClass( 'invalid' ); }); // Load available items if it looks like we'll need them. api.panel( 'nav_menus' ).container.bind( 'expanded', function() { if ( ! self.rendered ) { self.initList(); self.rendered = true; } }); // Load more items. this.sectionContent.scroll( function() { var totalHeight = self.$el.find( '.accordion-section.open .available-menu-items-list' ).prop( 'scrollHeight' ), visibleHeight = self.$el.find( '.accordion-section.open' ).height(); if ( ! self.loading && $( this ).scrollTop() > 3 / 4 totalHeight - visibleHeight ) { var type = $( this ).data( 'type' ), object = $( this ).data( 'object' ); if ( 'search' === type ) { if ( self.searchTerm ) { self.doSearch( self.pages.search ); } } else { self.loadItems( [ { type: type, object: object } ] ); } } }); // Close the panel if the URL in the preview changes. api.previewer.bind( 'url', this.close ); self.delegateEvents(); }, // Search input change handler. search: function( event ) { var $searchSection = $( '#available-menu-items-search' ), $otherSections = $( '#available-menu-items .accordion-section' ).not( $searchSection ); if ( ! event ) { return; } if ( this.searchTerm === event.target.value ) { return; } if ( '' !== event.target.value && ! $searchSection.hasClass( 'open' ) ) { $otherSections.fadeOut( 100 ); $searchSection.find( '.accordion-section-content' ).slideDown( 'fast' ); $searchSection.addClass( 'open' ); this.$clearResults.addClass( 'is-visible' ); } else if ( '' === event.target.value ) { $searchSection.removeClass( 'open' ); $otherSections.show(); this.$clearResults.removeClass( 'is-visible' ); } this.searchTerm = event.target.value; this.pages.search = 1; this.doSearch( 1 ); }, // Get search results. doSearch: function( page ) { var self = this, params, $section = $( '#available-menu-items-search' ), $content = $section.find( '.accordion-section-content' ), itemTemplate = wp.template( 'available-menu-item' ); if ( self.currentRequest ) { self.currentRequest.abort(); } if ( page < 0 ) { return; } else if ( page > 1 ) { $section.addClass( 'loading-more' ); $content.attr( 'aria-busy', 'true' ); wp.a11y.speak( api.Menus.data.l10n.itemsLoadingMore ); } else if ( '' === self.searchTerm ) { $content.html( '' ); wp.a11y.speak( '' ); return; } $section.addClass( 'loading' ); self.loading = true; params = api.previewer.query( { excludeCustomizedSaved: true } ); _.extend( params, { 'customize-menus-nonce': api.settings.nonce['customize-menus'], 'wp_customize': 'on', 'search': self.searchTerm, 'page': page } ); self.currentRequest = wp.ajax.post( 'search-available-menu-items-customizer', params ); self.currentRequest.done(function( data ) { var items; if ( 1 === page ) { // Clear previous results as it's a new search. $content.empty(); } $section.removeClass( 'loading loading-more' ); $content.attr( 'aria-busy', 'false' ); $section.addClass( 'open' ); self.loading = false; items = new api.Menus.AvailableItemCollection( data.items ); self.collection.add( items.models ); items.each( function( menuItem ) { $content.append( itemTemplate( menuItem.attributes ) ); } ); if ( 20 > items.length ) { self.pages.search = -1; // Up to 20 posts and 20 terms in results, if <20, no more results for either. } else { self.pages.search = self.pages.search + 1; } if ( items && page > 1 ) { wp.a11y.speak( api.Menus.data.l10n.itemsFoundMore.replace( '%d', items.length ) ); } else if ( items && page === 1 ) { wp.a11y.speak( api.Menus.data.l10n.itemsFound.replace( '%d', items.length ) ); } }); self.currentRequest.fail(function( data ) { // data.message may be undefined, for example when typing slow and the request is aborted. if ( data.message ) { $content.empty().append( $( '<li class="nothing-found"></li>' ).text( data.message ) ); wp.a11y.speak( data.message ); } self.pages.search = -1; }); self.currentRequest.always(function() { $section.removeClass( 'loading loading-more' ); $content.attr( 'aria-busy', 'false' ); self.loading = false; self.currentRequest = null; }); }, // Render the individual items. initList: function() { var self = this; // Render the template for each item by type. _.each( api.Menus.data.itemTypes, function( itemType ) { self.pages[ itemType.type + ':' + itemType.object ] = 0; } ); self.loadItems( api.Menus.data.itemTypes ); }, /** * Load available nav menu items. * * @since 4.3.0 * @since 4.7.0 Changed function signature to take list of item types instead of single type/object. * @access private * * @param {Array.<Object>} itemTypes List of objects containing type and key. * @param {string} deprecated Formerly the object parameter. * @return {void} / loadItems: function( itemTypes, deprecated ) { var self = this, _itemTypes, requestItemTypes = [], params, request, itemTemplate, availableMenuItemContainers = {}; itemTemplate = wp.template( 'available-menu-item' ); if ( _.isString( itemTypes ) && _.isString( deprecated ) ) { _itemTypes = [ { type: itemTypes, object: deprecated } ]; } else { _itemTypes = itemTypes; } _.each( _itemTypes, function( itemType ) { var container, name = itemType.type + ':' + itemType.object; if ( -1 === self.pages[ name ] ) { return; // Skip types for which there are no more results. } container = $( '#available-menu-items-' + itemType.type + '-' + itemType.object ); container.find( '.accordion-section-title' ).addClass( 'loading' ); availableMenuItemContainers[ name ] = container; requestItemTypes.push( { object: itemType.object, type: itemType.type, page: self.pages[ name ] } ); } ); if ( 0 === requestItemTypes.length ) { return; } self.loading = true; params = api.previewer.query( { excludeCustomizedSaved: true } ); _.extend( params, { 'customize-menus-nonce': api.settings.nonce['customize-menus'], 'wp_customize': 'on', 'item_types': requestItemTypes } ); request = wp.ajax.post( 'load-available-menu-items-customizer', params ); request.done(function( data ) { var typeInner; _.each( data.items, function( typeItems, name ) { if ( 0 === typeItems.length ) { if ( 0 === self.pages[ name ] ) { availableMenuItemContainers[ name ].find( '.accordion-section-title' ) .addClass( 'cannot-expand' ) .removeClass( 'loading' ) .find( '.accordion-section-title > button' ) .prop( 'tabIndex', -1 ); } self.pages[ name ] = -1; return; } else if ( ( 'post_type:page' === name ) && ( ! availableMenuItemContainers[ name ].hasClass( 'open' ) ) ) { availableMenuItemContainers[ name ].find( '.accordion-section-title > button' ).click(); } typeItems = new api.Menus.AvailableItemCollection( typeItems ); // @todo Why is this collection created and then thrown away? self.collection.add( typeItems.models ); typeInner = availableMenuItemContainers[ name ].find( '.available-menu-items-list' ); typeItems.each( function( menuItem ) { typeInner.append( itemTemplate( menuItem.attributes ) ); } ); self.pages[ name ] += 1; }); }); request.fail(function( data ) { if ( typeof console !== 'undefined' && console.error ) { console.error( data ); } }); request.always(function() { _.each( availableMenuItemContainers, function( container ) { container.find( '.accordion-section-title' ).removeClass( 'loading' ); } ); self.loading = false; }); }, // Adjust the height of each section of items to fit the screen. itemSectionHeight: function() { var sections, lists, totalHeight, accordionHeight, diff; totalHeight = window.innerHeight; sections = this.$el.find( '.accordion-section:not( #available-menu-items-search ) .accordion-section-content' ); lists = this.$el.find( '.accordion-section:not( #available-menu-items-search ) .available-menu-items-list:not(":only-child")' ); accordionHeight = 46 ( 1 + sections.length ) + 14; // Magic numbers. diff = totalHeight - accordionHeight; if ( 120 < diff && 290 > diff ) { sections.css( 'max-height', diff ); lists.css( 'max-height', ( diff - 60 ) ); } }, // Highlights a menu item. select: function( menuitemTpl ) { this.selected = $( menuitemTpl ); this.selected.siblings( '.menu-item-tpl' ).removeClass( 'selected' ); this.selected.addClass( 'selected' ); }, // Highlights a menu item on focus. focus: function( event ) { this.select( $( event.currentTarget ) ); }, // Submit handler for keypress and click on menu item. _submit: function( event ) { // Only proceed with keypress if it is Enter or Spacebar. if ( 'keypress' === event.type && ( 13 !== event.which && 32 !== event.which ) ) { return; } this.submit( $( event.currentTarget ) ); }, // Adds a selected menu item to the menu. submit: function( menuitemTpl ) { var menuitemId, menu_item; if ( ! menuitemTpl ) { menuitemTpl = this.selected; } if ( ! menuitemTpl \|\| ! this.currentMenuControl ) { return; } this.select( menuitemTpl ); menuitemId = $( this.selected ).data( 'menu-item-id' ); menu_item = this.collection.findWhere( { id: menuitemId } ); if ( ! menu_item ) { return; } this.currentMenuControl.addItemToMenu( menu_item.attributes ); $( menuitemTpl ).find( '.menu-item-handle' ).addClass( 'item-added' ); }, // Submit handler for keypress and click on custom menu item. _submitLink: function( event ) { // Only proceed with keypress if it is Enter. if ( 'keypress' === event.type && 13 !== event.which ) { return; } this.submitLink(); }, // Adds the custom menu item to the menu. submitLink: function() { var menuItem, itemName = $( '#custom-menu-item-name' ), itemUrl = $( '#custom-menu-item-url' ), url = itemUrl.val().trim(), urlRegex; if ( ! this.currentMenuControl ) { return; } /* * Allow URLs including: * - http://example.com/ * - //example.com * - /directory/ * - ?query-param * - #target * - mailto:foo@example.com * * Any further validation will be handled on the server when the setting is attempted to be saved, * so this pattern does not need to be complete. / urlRegex = /^((\w+:)?\/\/\w.\|\w+:(?!\/\/$)\|\/\|\?\|#)/; if ( '' === itemName.val() ) { itemName.addClass( 'invalid' ); return; } else if ( ! urlRegex.test( url ) ) { itemUrl.addClass( 'invalid' ); return; } menuItem = { 'title': itemName.val(), 'url': url, 'type': 'custom', 'type_label': api.Menus.data.l10n.custom_label, 'object': 'custom' }; this.currentMenuControl.addItemToMenu( menuItem ); // Reset the custom link form. itemUrl.val( '' ).attr( 'placeholder', 'https://' ); itemName.val( '' ); }, /** * Submit handler for keypress (enter) on field and click on button. * * @since 4.7.0 * @private * * @param {jQuery.Event} event Event. * @return {void} / _submitNew: function( event ) { var container; // Only proceed with keypress if it is Enter. if ( 'keypress' === event.type && 13 !== event.which ) { return; } if ( this.addingNew ) { return; } container = $( event.target ).closest( '.accordion-section' ); this.submitNew( container ); }, /* * Creates a new object and adds an associated menu item to the menu. * * @since 4.7.0 * @private * * @param {jQuery} container * @return {void} / submitNew: function( container ) { var panel = this, itemName = container.find( '.create-item-input' ), title = itemName.val(), dataContainer = container.find( '.available-menu-items-list' ), itemType = dataContainer.data( 'type' ), itemObject = dataContainer.data( 'object' ), itemTypeLabel = dataContainer.data( 'type_label' ), promise; if ( ! this.currentMenuControl ) { return; } // Only posts are supported currently. if ( 'post_type' !== itemType ) { return; } if ( '' === $.trim( itemName.val() ) ) { itemName.addClass( 'invalid' ); itemName.focus(); return; } else { itemName.removeClass( 'invalid' ); container.find( '.accordion-section-title' ).addClass( 'loading' ); } panel.addingNew = true; itemName.attr( 'disabled', 'disabled' ); promise = api.Menus.insertAutoDraftPost( { post_title: title, post_type: itemObject } ); promise.done( function( data ) { var availableItem, $content, itemElement; availableItem = new api.Menus.AvailableItemModel( { 'id': 'post-' + data.post_id, // Used for available menu item Backbone models. 'title': itemName.val(), 'type': itemType, 'type_label': itemTypeLabel, 'object': itemObject, 'object_id': data.post_id, 'url': data.url } ); // Add new item to menu. panel.currentMenuControl.addItemToMenu( availableItem.attributes ); // Add the new item to the list of available items. api.Menus.availableMenuItemsPanel.collection.add( availableItem ); $content = container.find( '.available-menu-items-list' ); itemElement = $( wp.template( 'available-menu-item' )( availableItem.attributes ) ); itemElement.find( '.menu-item-handle:first' ).addClass( 'item-added' ); $content.prepend( itemElement ); $content.scrollTop(); // Reset the create content form. itemName.val( '' ).removeAttr( 'disabled' ); panel.addingNew = false; container.find( '.accordion-section-title' ).removeClass( 'loading' ); } ); }, // Opens the panel. open: function( menuControl ) { var panel = this, close; this.currentMenuControl = menuControl; this.itemSectionHeight(); if ( api.section.has( 'publish_settings' ) ) { api.section( 'publish_settings' ).collapse(); } $( 'body' ).addClass( 'adding-menu-items' ); close = function() { panel.close(); $( this ).off( 'click', close ); }; $( '#customize-preview' ).on( 'click', close ); // Collapse all controls. _( this.currentMenuControl.getMenuItemControls() ).each( function( control ) { control.collapseForm(); } ); this.$el.find( '.selected' ).removeClass( 'selected' ); this.$search.focus(); }, // Closes the panel. close: function( options ) { options = options \|\| {}; if ( options.returnFocus && this.currentMenuControl ) { this.currentMenuControl.container.find( '.add-new-menu-item' ).focus(); } this.currentMenuControl = null; this.selected = null; $( 'body' ).removeClass( 'adding-menu-items' ); $( '#available-menu-items .menu-item-handle.item-added' ).removeClass( 'item-added' ); this.$search.val( '' ).trigger( 'input' ); }, // Add a few keyboard enhancements to the panel. keyboardAccessible: function( event ) { var isEnter = ( 13 === event.which ), isEsc = ( 27 === event.which ), isBackTab = ( 9 === event.which && event.shiftKey ), isSearchFocused = $( event.target ).is( this.$search ); // If enter pressed but nothing entered, don't do anything. if ( isEnter && ! this.$search.val() ) { return; } if ( isSearchFocused && isBackTab ) { this.currentMenuControl.container.find( '.add-new-menu-item' ).focus(); event.preventDefault(); // Avoid additional back-tab. } else if ( isEsc ) { this.close( { returnFocus: true } ); } } }); /* * wp.customize.Menus.MenusPanel * * Customizer panel for menus. This is used only for screen options management. * Note that 'menus' must match the WP_Customize_Menu_Panel::$type. * * @class wp.customize.Menus.MenusPanel * @augments wp.customize.Panel / api.Menus.MenusPanel = api.Panel.extend(/* @lends wp.customize.Menus.MenusPanel.prototype /{ attachEvents: function() { api.Panel.prototype.attachEvents.call( this ); var panel = this, panelMeta = panel.container.find( '.panel-meta' ), help = panelMeta.find( '.customize-help-toggle' ), content = panelMeta.find( '.customize-panel-description' ), options = $( '#screen-options-wrap' ), button = panelMeta.find( '.customize-screen-options-toggle' ); button.on( 'click keydown', function( event ) { if ( api.utils.isKeydownButNotEnterEvent( event ) ) { return; } event.preventDefault(); // Hide description. if ( content.not( ':hidden' ) ) { content.slideUp( 'fast' ); help.attr( 'aria-expanded', 'false' ); } if ( 'true' === button.attr( 'aria-expanded' ) ) { button.attr( 'aria-expanded', 'false' ); panelMeta.removeClass( 'open' ); panelMeta.removeClass( 'active-menu-screen-options' ); options.slideUp( 'fast' ); } else { button.attr( 'aria-expanded', 'true' ); panelMeta.addClass( 'open' ); panelMeta.addClass( 'active-menu-screen-options' ); options.slideDown( 'fast' ); } return false; } ); // Help toggle. help.on( 'click keydown', function( event ) { if ( api.utils.isKeydownButNotEnterEvent( event ) ) { return; } event.preventDefault(); if ( 'true' === button.attr( 'aria-expanded' ) ) { button.attr( 'aria-expanded', 'false' ); help.attr( 'aria-expanded', 'true' ); panelMeta.addClass( 'open' ); panelMeta.removeClass( 'active-menu-screen-options' ); options.slideUp( 'fast' ); content.slideDown( 'fast' ); } } ); }, /* * Update field visibility when clicking on the field toggles. / ready: function() { var panel = this; panel.container.find( '.hide-column-tog' ).click( function() { panel.saveManageColumnsState(); }); // Inject additional heading into the menu locations section's head container. api.section( 'menu_locations', function( section ) { section.headContainer.prepend( wp.template( 'nav-menu-locations-header' )( api.Menus.data ) ); } ); }, /* * Save hidden column states. * * @since 4.3.0 * @private * * @return {void} / saveManageColumnsState: _.debounce( function() { var panel = this; if ( panel._updateHiddenColumnsRequest ) { panel._updateHiddenColumnsRequest.abort(); } panel._updateHiddenColumnsRequest = wp.ajax.post( 'hidden-columns', { hidden: panel.hidden(), screenoptionnonce: $( '#screenoptionnonce' ).val(), page: 'nav-menus' } ); panel._updateHiddenColumnsRequest.always( function() { panel._updateHiddenColumnsRequest = null; } ); }, 2000 ), /* * @deprecated Since 4.7.0 now that the nav_menu sections are responsible for toggling the classes on their own containers. / checked: function() {}, /* * @deprecated Since 4.7.0 now that the nav_menu sections are responsible for toggling the classes on their own containers. / unchecked: function() {}, /* * Get hidden fields. * * @since 4.3.0 * @private * * @return {Array} Fields (columns) that are hidden. / hidden: function() { return $( '.hide-column-tog' ).not( ':checked' ).map( function() { var id = this.id; return id.substring( 0, id.length - 5 ); }).get().join( ',' ); } } ); /* * wp.customize.Menus.MenuSection * * Customizer section for menus. This is used only for lazy-loading child controls. * Note that 'nav_menu' must match the WP_Customize_Menu_Section::$type. * * @class wp.customize.Menus.MenuSection * @augments wp.customize.Section / api.Menus.MenuSection = api.Section.extend(/* @lends wp.customize.Menus.MenuSection.prototype /{ /* * Initialize. * * @since 4.3.0 * * @param {string} id * @param {Object} options / initialize: function( id, options ) { var section = this; api.Section.prototype.initialize.call( section, id, options ); section.deferred.initSortables = $.Deferred(); }, /* * Ready. / ready: function() { var section = this, fieldActiveToggles, handleFieldActiveToggle; if ( 'undefined' === typeof section.params.menu_id ) { throw new Error( 'params.menu_id was not defined' ); } / * Since newly created sections won't be registered in PHP, we need to prevent the * preview's sending of the activeSections to result in this control * being deactivated when the preview refreshes. So we can hook onto * the setting that has the same ID and its presence can dictate * whether the section is active. / section.active.validate = function() { if ( ! api.has( section.id ) ) { return false; } return !! api( section.id ).get(); }; section.populateControls(); section.navMenuLocationSettings = {}; section.assignedLocations = new api.Value( [] ); api.each(function( setting, id ) { var matches = id.match( /^nav_menu_locations\[(.+?)]/ ); if ( matches ) { section.navMenuLocationSettings[ matches[1] ] = setting; setting.bind( function() { section.refreshAssignedLocations(); }); } }); section.assignedLocations.bind(function( to ) { section.updateAssignedLocationsInSectionTitle( to ); }); section.refreshAssignedLocations(); api.bind( 'pane-contents-reflowed', function() { // Skip menus that have been removed. if ( ! section.contentContainer.parent().length ) { return; } section.container.find( '.menu-item .menu-item-reorder-nav button' ).attr({ 'tabindex': '0', 'aria-hidden': 'false' }); section.container.find( '.menu-item.move-up-disabled .menus-move-up' ).attr({ 'tabindex': '-1', 'aria-hidden': 'true' }); section.container.find( '.menu-item.move-down-disabled .menus-move-down' ).attr({ 'tabindex': '-1', 'aria-hidden': 'true' }); section.container.find( '.menu-item.move-left-disabled .menus-move-left' ).attr({ 'tabindex': '-1', 'aria-hidden': 'true' }); section.container.find( '.menu-item.move-right-disabled .menus-move-right' ).attr({ 'tabindex': '-1', 'aria-hidden': 'true' }); } ); /* * Update the active field class for the content container for a given checkbox toggle. * * @this {jQuery} * @return {void} / handleFieldActiveToggle = function() { var className = 'field-' + $( this ).val() + '-active'; section.contentContainer.toggleClass( className, $( this ).prop( 'checked' ) ); }; fieldActiveToggles = api.panel( 'nav_menus' ).contentContainer.find( '.metabox-prefs:first' ).find( '.hide-column-tog' ); fieldActiveToggles.each( handleFieldActiveToggle ); fieldActiveToggles.on( 'click', handleFieldActiveToggle ); }, populateControls: function() { var section = this, menuNameControlId, menuLocationsControlId, menuAutoAddControlId, menuDeleteControlId, menuControl, menuNameControl, menuLocationsControl, menuAutoAddControl, menuDeleteControl; // Add the control for managing the menu name. menuNameControlId = section.id + '[name]'; menuNameControl = api.control( menuNameControlId ); if ( ! menuNameControl ) { menuNameControl = new api.controlConstructor.nav_menu_name( menuNameControlId, { type: 'nav_menu_name', label: api.Menus.data.l10n.menuNameLabel, section: section.id, priority: 0, settings: { 'default': section.id } } ); api.control.add( menuNameControl ); menuNameControl.active.set( true ); } // Add the menu control. menuControl = api.control( section.id ); if ( ! menuControl ) { menuControl = new api.controlConstructor.nav_menu( section.id, { type: 'nav_menu', section: section.id, priority: 998, settings: { 'default': section.id }, menu_id: section.params.menu_id } ); api.control.add( menuControl ); menuControl.active.set( true ); } // Add the menu locations control. menuLocationsControlId = section.id + '[locations]'; menuLocationsControl = api.control( menuLocationsControlId ); if ( ! menuLocationsControl ) { menuLocationsControl = new api.controlConstructor.nav_menu_locations( menuLocationsControlId, { section: section.id, priority: 999, settings: { 'default': section.id }, menu_id: section.params.menu_id } ); api.control.add( menuLocationsControl.id, menuLocationsControl ); menuControl.active.set( true ); } // Add the control for managing the menu auto_add. menuAutoAddControlId = section.id + '[auto_add]'; menuAutoAddControl = api.control( menuAutoAddControlId ); if ( ! menuAutoAddControl ) { menuAutoAddControl = new api.controlConstructor.nav_menu_auto_add( menuAutoAddControlId, { type: 'nav_menu_auto_add', label: '', section: section.id, priority: 1000, settings: { 'default': section.id } } ); api.control.add( menuAutoAddControl ); menuAutoAddControl.active.set( true ); } // Add the control for deleting the menu. menuDeleteControlId = section.id + '[delete]'; menuDeleteControl = api.control( menuDeleteControlId ); if ( ! menuDeleteControl ) { menuDeleteControl = new api.Control( menuDeleteControlId, { section: section.id, priority: 1001, templateId: 'nav-menu-delete-button' } ); api.control.add( menuDeleteControl.id, menuDeleteControl ); menuDeleteControl.active.set( true ); menuDeleteControl.deferred.embedded.done( function () { menuDeleteControl.container.find( 'button' ).on( 'click', function() { var menuId = section.params.menu_id; var menuControl = api.Menus.getMenuControl( menuId ); menuControl.setting.set( false ); }); } ); } }, /* * / refreshAssignedLocations: function() { var section = this, menuTermId = section.params.menu_id, currentAssignedLocations = []; _.each( section.navMenuLocationSettings, function( setting, themeLocation ) { if ( setting() === menuTermId ) { currentAssignedLocations.push( themeLocation ); } }); section.assignedLocations.set( currentAssignedLocations ); }, /* * @param {Array} themeLocationSlugs Theme location slugs. / updateAssignedLocationsInSectionTitle: function( themeLocationSlugs ) { var section = this, $title; $title = section.container.find( '.accordion-section-title:first' ); $title.find( '.menu-in-location' ).remove(); _.each( themeLocationSlugs, function( themeLocationSlug ) { var $label, locationName; $label = $( '<span class="menu-in-location"></span>' ); locationName = api.Menus.data.locationSlugMappedToName[ themeLocationSlug ]; $label.text( api.Menus.data.l10n.menuLocation.replace( '%s', locationName ) ); $title.append( $label ); }); section.container.toggleClass( 'assigned-to-menu-location', 0 !== themeLocationSlugs.length ); }, onChangeExpanded: function( expanded, args ) { var section = this, completeCallback; if ( expanded ) { wpNavMenu.menuList = section.contentContainer; wpNavMenu.targetList = wpNavMenu.menuList; // Add attributes needed by wpNavMenu. $( '#menu-to-edit' ).removeAttr( 'id' ); wpNavMenu.menuList.attr( 'id', 'menu-to-edit' ).addClass( 'menu' ); _.each( api.section( section.id ).controls(), function( control ) { if ( 'nav_menu_item' === control.params.type ) { control.actuallyEmbed(); } } ); // Make sure Sortables is initialized after the section has been expanded to prevent `offset` issues. if ( args.completeCallback ) { completeCallback = args.completeCallback; } args.completeCallback = function() { if ( 'resolved' !== section.deferred.initSortables.state() ) { wpNavMenu.initSortables(); // Depends on menu-to-edit ID being set above. section.deferred.initSortables.resolve( wpNavMenu.menuList ); // Now MenuControl can extend the sortable. // @todo Note that wp.customize.reflowPaneContents() is debounced, // so this immediate change will show a slight flicker while priorities get updated. api.control( 'nav_menu[' + String( section.params.menu_id ) + ']' ).reflowMenuItems(); } if ( _.isFunction( completeCallback ) ) { completeCallback(); } }; } api.Section.prototype.onChangeExpanded.call( section, expanded, args ); }, /* * Highlight how a user may create new menu items. * * This method reminds the user to create new menu items and how. * It's exposed this way because this class knows best which UI needs * highlighted but those expanding this section know more about why and * when the affordance should be highlighted. * * @since 4.9.0 * * @return {void} / highlightNewItemButton: function() { api.utils.highlightButton( this.contentContainer.find( '.add-new-menu-item' ), { delay: 2000 } ); } }); /* * Create a nav menu setting and section. * * @since 4.9.0 * * @param {string} [name=''] Nav menu name. * @return {wp.customize.Menus.MenuSection} Added nav menu. / api.Menus.createNavMenu = function createNavMenu( name ) { var customizeId, placeholderId, setting; placeholderId = api.Menus.generatePlaceholderAutoIncrementId(); customizeId = 'nav_menu[' + String( placeholderId ) + ']'; // Register the menu control setting. setting = api.create( customizeId, customizeId, {}, { type: 'nav_menu', transport: api.Menus.data.settingTransport, previewer: api.previewer } ); setting.set( $.extend( {}, api.Menus.data.defaultSettingValues.nav_menu, { name: name \|\| '' } ) ); / * Add the menu section (and its controls). * Note that this will automatically create the required controls * inside via the Section's ready method. / return api.section.add( new api.Menus.MenuSection( customizeId, { panel: 'nav_menus', title: displayNavMenuName( name ), customizeAction: api.Menus.data.l10n.customizingMenus, priority: 10, menu_id: placeholderId } ) ); }; /* * wp.customize.Menus.NewMenuSection * * Customizer section for new menus. * * @class wp.customize.Menus.NewMenuSection * @augments wp.customize.Section / api.Menus.NewMenuSection = api.Section.extend(/* @lends wp.customize.Menus.NewMenuSection.prototype /{ /* * Add behaviors for the accordion section. * * @since 4.3.0 / attachEvents: function() { var section = this, container = section.container, contentContainer = section.contentContainer, navMenuSettingPattern = /^nav_menu\[/; section.headContainer.find( '.accordion-section-title' ).replaceWith( wp.template( 'nav-menu-create-menu-section-title' ) ); / * We have to manually handle section expanded because we do not * apply the `accordion-section-title` class to this button-driven section. / container.on( 'click', '.customize-add-menu-button', function() { section.expand(); }); contentContainer.on( 'keydown', '.menu-name-field', function( event ) { if ( 13 === event.which ) { // Enter. section.submit(); } } ); contentContainer.on( 'click', '#customize-new-menu-submit', function( event ) { section.submit(); event.stopPropagation(); event.preventDefault(); } ); /* * Get number of non-deleted nav menus. * * @since 4.9.0 * @return {number} Count. / function getNavMenuCount() { var count = 0; api.each( function( setting ) { if ( navMenuSettingPattern.test( setting.id ) && false !== setting.get() ) { count += 1; } } ); return count; } /* * Update visibility of notice to prompt users to create menus. * * @since 4.9.0 * @return {void} / function updateNoticeVisibility() { container.find( '.add-new-menu-notice' ).prop( 'hidden', getNavMenuCount() > 0 ); } /* * Handle setting addition. * * @since 4.9.0 * @param {wp.customize.Setting} setting - Added setting. * @return {void} / function addChangeEventListener( setting ) { if ( navMenuSettingPattern.test( setting.id ) ) { setting.bind( updateNoticeVisibility ); updateNoticeVisibility(); } } /* * Handle setting removal. * * @since 4.9.0 * @param {wp.customize.Setting} setting - Removed setting. * @return {void} / function removeChangeEventListener( setting ) { if ( navMenuSettingPattern.test( setting.id ) ) { setting.unbind( updateNoticeVisibility ); updateNoticeVisibility(); } } api.each( addChangeEventListener ); api.bind( 'add', addChangeEventListener ); api.bind( 'removed', removeChangeEventListener ); updateNoticeVisibility(); api.Section.prototype.attachEvents.apply( section, arguments ); }, /* * Set up the control. * * @since 4.9.0 / ready: function() { this.populateControls(); }, /* * Create the controls for this section. * * @since 4.9.0 / populateControls: function() { var section = this, menuNameControlId, menuLocationsControlId, newMenuSubmitControlId, menuNameControl, menuLocationsControl, newMenuSubmitControl; menuNameControlId = section.id + '[name]'; menuNameControl = api.control( menuNameControlId ); if ( ! menuNameControl ) { menuNameControl = new api.controlConstructor.nav_menu_name( menuNameControlId, { label: api.Menus.data.l10n.menuNameLabel, description: api.Menus.data.l10n.newMenuNameDescription, section: section.id, priority: 0 } ); api.control.add( menuNameControl.id, menuNameControl ); menuNameControl.active.set( true ); } menuLocationsControlId = section.id + '[locations]'; menuLocationsControl = api.control( menuLocationsControlId ); if ( ! menuLocationsControl ) { menuLocationsControl = new api.controlConstructor.nav_menu_locations( menuLocationsControlId, { section: section.id, priority: 1, menu_id: '', isCreating: true } ); api.control.add( menuLocationsControlId, menuLocationsControl ); menuLocationsControl.active.set( true ); } newMenuSubmitControlId = section.id + '[submit]'; newMenuSubmitControl = api.control( newMenuSubmitControlId ); if ( !newMenuSubmitControl ) { newMenuSubmitControl = new api.Control( newMenuSubmitControlId, { section: section.id, priority: 1, templateId: 'nav-menu-submit-new-button' } ); api.control.add( newMenuSubmitControlId, newMenuSubmitControl ); newMenuSubmitControl.active.set( true ); } }, /* * Create the new menu with name and location supplied by the user. * * @since 4.9.0 / submit: function() { var section = this, contentContainer = section.contentContainer, nameInput = contentContainer.find( '.menu-name-field' ).first(), name = nameInput.val(), menuSection; if ( ! name ) { nameInput.addClass( 'invalid' ); nameInput.focus(); return; } menuSection = api.Menus.createNavMenu( name ); // Clear name field. nameInput.val( '' ); nameInput.removeClass( 'invalid' ); contentContainer.find( '.assigned-menu-location input[type=checkbox]' ).each( function() { var checkbox = $( this ), navMenuLocationSetting; if ( checkbox.prop( 'checked' ) ) { navMenuLocationSetting = api( 'nav_menu_locations[' + checkbox.data( 'location-id' ) + ']' ); navMenuLocationSetting.set( menuSection.params.menu_id ); // Reset state for next new menu. checkbox.prop( 'checked', false ); } } ); wp.a11y.speak( api.Menus.data.l10n.menuAdded ); // Focus on the new menu section. menuSection.focus( { completeCallback: function() { menuSection.highlightNewItemButton(); } } ); }, /* * Select a default location. * * This method selects a single location by default so we can support * creating a menu for a specific menu location. * * @since 4.9.0 * * @param {string\|null} locationId - The ID of the location to select. `null` clears all selections. * @return {void} / selectDefaultLocation: function( locationId ) { var locationControl = api.control( this.id + '[locations]' ), locationSelections = {}; if ( locationId !== null ) { locationSelections[ locationId ] = true; } locationControl.setSelections( locationSelections ); } }); /* * wp.customize.Menus.MenuLocationControl * * Customizer control for menu locations (rendered as a <select>). * Note that 'nav_menu_location' must match the WP_Customize_Nav_Menu_Location_Control::$type. * * @class wp.customize.Menus.MenuLocationControl * @augments wp.customize.Control / api.Menus.MenuLocationControl = api.Control.extend(/* @lends wp.customize.Menus.MenuLocationControl.prototype /{ initialize: function( id, options ) { var control = this, matches = id.match( /^nav_menu_locations\[(.+?)]/ ); control.themeLocation = matches[1]; api.Control.prototype.initialize.call( control, id, options ); }, ready: function() { var control = this, navMenuIdRegex = /^nav_menu\[(-?\d+)]/; // @todo It would be better if this was added directly on the setting itself, as opposed to the control. control.setting.validate = function( value ) { if ( '' === value ) { return 0; } else { return parseInt( value, 10 ); } }; // Create and Edit menu buttons. control.container.find( '.create-menu' ).on( 'click', function() { var addMenuSection = api.section( 'add_menu' ); addMenuSection.selectDefaultLocation( this.dataset.locationId ); addMenuSection.focus(); } ); control.container.find( '.edit-menu' ).on( 'click', function() { var menuId = control.setting(); api.section( 'nav_menu[' + menuId + ']' ).focus(); }); control.setting.bind( 'change', function() { var menuIsSelected = 0 !== control.setting(); control.container.find( '.create-menu' ).toggleClass( 'hidden', menuIsSelected ); control.container.find( '.edit-menu' ).toggleClass( 'hidden', ! menuIsSelected ); }); // Add/remove menus from the available options when they are added and removed. api.bind( 'add', function( setting ) { var option, menuId, matches = setting.id.match( navMenuIdRegex ); if ( ! matches \|\| false === setting() ) { return; } menuId = matches[1]; option = new Option( displayNavMenuName( setting().name ), menuId ); control.container.find( 'select' ).append( option ); }); api.bind( 'remove', function( setting ) { var menuId, matches = setting.id.match( navMenuIdRegex ); if ( ! matches ) { return; } menuId = parseInt( matches[1], 10 ); if ( control.setting() === menuId ) { control.setting.set( '' ); } control.container.find( 'option[value=' + menuId + ']' ).remove(); }); api.bind( 'change', function( setting ) { var menuId, matches = setting.id.match( navMenuIdRegex ); if ( ! matches ) { return; } menuId = parseInt( matches[1], 10 ); if ( false === setting() ) { if ( control.setting() === menuId ) { control.setting.set( '' ); } control.container.find( 'option[value=' + menuId + ']' ).remove(); } else { control.container.find( 'option[value=' + menuId + ']' ).text( displayNavMenuName( setting().name ) ); } }); } }); api.Menus.MenuItemControl = api.Control.extend(/* @lends wp.customize.Menus.MenuItemControl.prototype /{ /* * wp.customize.Menus.MenuItemControl * * Customizer control for menu items. * Note that 'menu_item' must match the WP_Customize_Menu_Item_Control::$type. * * @constructs wp.customize.Menus.MenuItemControl * @augments wp.customize.Control * * @inheritDoc / initialize: function( id, options ) { var control = this; control.expanded = new api.Value( false ); control.expandedArgumentsQueue = []; control.expanded.bind( function( expanded ) { var args = control.expandedArgumentsQueue.shift(); args = $.extend( {}, control.defaultExpandedArguments, args ); control.onChangeExpanded( expanded, args ); }); api.Control.prototype.initialize.call( control, id, options ); control.active.validate = function() { var value, section = api.section( control.section() ); if ( section ) { value = section.active(); } else { value = false; } return value; }; }, /* * Override the embed() method to do nothing, * so that the control isn't embedded on load, * unless the containing section is already expanded. * * @since 4.3.0 / embed: function() { var control = this, sectionId = control.section(), section; if ( ! sectionId ) { return; } section = api.section( sectionId ); if ( ( section && section.expanded() ) \|\| api.settings.autofocus.control === control.id ) { control.actuallyEmbed(); } }, /* * This function is called in Section.onChangeExpanded() so the control * will only get embedded when the Section is first expanded. * * @since 4.3.0 / actuallyEmbed: function() { var control = this; if ( 'resolved' === control.deferred.embedded.state() ) { return; } control.renderContent(); control.deferred.embedded.resolve(); // This triggers control.ready(). }, /* * Set up the control. / ready: function() { if ( 'undefined' === typeof this.params.menu_item_id ) { throw new Error( 'params.menu_item_id was not defined' ); } this._setupControlToggle(); this._setupReorderUI(); this._setupUpdateUI(); this._setupRemoveUI(); this._setupLinksUI(); this._setupTitleUI(); }, /* * Show/hide the settings when clicking on the menu item handle. / _setupControlToggle: function() { var control = this; this.container.find( '.menu-item-handle' ).on( 'click', function( e ) { e.preventDefault(); e.stopPropagation(); var menuControl = control.getMenuControl(), isDeleteBtn = $( e.target ).is( '.item-delete, .item-delete ' ), isAddNewBtn = $( e.target ).is( '.add-new-menu-item, .add-new-menu-item ' ); if ( $( 'body' ).hasClass( 'adding-menu-items' ) && ! isDeleteBtn && ! isAddNewBtn ) { api.Menus.availableMenuItemsPanel.close(); } if ( menuControl.isReordering \|\| menuControl.isSorting ) { return; } control.toggleForm(); } ); }, /* * Set up the menu-item-reorder-nav / _setupReorderUI: function() { var control = this, template, $reorderNav; template = wp.template( 'menu-item-reorder-nav' ); // Add the menu item reordering elements to the menu item control. control.container.find( '.item-controls' ).after( template ); // Handle clicks for up/down/left-right on the reorder nav. $reorderNav = control.container.find( '.menu-item-reorder-nav' ); $reorderNav.find( '.menus-move-up, .menus-move-down, .menus-move-left, .menus-move-right' ).on( 'click', function() { var moveBtn = $( this ); moveBtn.focus(); var isMoveUp = moveBtn.is( '.menus-move-up' ), isMoveDown = moveBtn.is( '.menus-move-down' ), isMoveLeft = moveBtn.is( '.menus-move-left' ), isMoveRight = moveBtn.is( '.menus-move-right' ); if ( isMoveUp ) { control.moveUp(); } else if ( isMoveDown ) { control.moveDown(); } else if ( isMoveLeft ) { control.moveLeft(); } else if ( isMoveRight ) { control.moveRight(); } moveBtn.focus(); // Re-focus after the container was moved. } ); }, /* * Set up event handlers for menu item updating. / _setupUpdateUI: function() { var control = this, settingValue = control.setting(), updateNotifications; control.elements = {}; control.elements.url = new api.Element( control.container.find( '.edit-menu-item-url' ) ); control.elements.title = new api.Element( control.container.find( '.edit-menu-item-title' ) ); control.elements.attr_title = new api.Element( control.container.find( '.edit-menu-item-attr-title' ) ); control.elements.target = new api.Element( control.container.find( '.edit-menu-item-target' ) ); control.elements.classes = new api.Element( control.container.find( '.edit-menu-item-classes' ) ); control.elements.xfn = new api.Element( control.container.find( '.edit-menu-item-xfn' ) ); control.elements.description = new api.Element( control.container.find( '.edit-menu-item-description' ) ); // @todo Allow other elements, added by plugins, to be automatically picked up here; // allow additional values to be added to setting array. _.each( control.elements, function( element, property ) { element.bind(function( value ) { if ( element.element.is( 'input[type=checkbox]' ) ) { value = ( value ) ? element.element.val() : ''; } var settingValue = control.setting(); if ( settingValue && settingValue[ property ] !== value ) { settingValue = _.clone( settingValue ); settingValue[ property ] = value; control.setting.set( settingValue ); } }); if ( settingValue ) { if ( ( property === 'classes' \|\| property === 'xfn' ) && _.isArray( settingValue[ property ] ) ) { element.set( settingValue[ property ].join( ' ' ) ); } else { element.set( settingValue[ property ] ); } } }); control.setting.bind(function( to, from ) { var itemId = control.params.menu_item_id, followingSiblingItemControls = [], childrenItemControls = [], menuControl; if ( false === to ) { menuControl = api.control( 'nav_menu[' + String( from.nav_menu_term_id ) + ']' ); control.container.remove(); _.each( menuControl.getMenuItemControls(), function( otherControl ) { if ( from.menu_item_parent === otherControl.setting().menu_item_parent && otherControl.setting().position > from.position ) { followingSiblingItemControls.push( otherControl ); } else if ( otherControl.setting().menu_item_parent === itemId ) { childrenItemControls.push( otherControl ); } }); // Shift all following siblings by the number of children this item has. _.each( followingSiblingItemControls, function( followingSiblingItemControl ) { var value = _.clone( followingSiblingItemControl.setting() ); value.position += childrenItemControls.length; followingSiblingItemControl.setting.set( value ); }); // Now move the children up to be the new subsequent siblings. _.each( childrenItemControls, function( childrenItemControl, i ) { var value = _.clone( childrenItemControl.setting() ); value.position = from.position + i; value.menu_item_parent = from.menu_item_parent; childrenItemControl.setting.set( value ); }); menuControl.debouncedReflowMenuItems(); } else { // Update the elements' values to match the new setting properties. _.each( to, function( value, key ) { if ( control.elements[ key] ) { control.elements[ key ].set( to[ key ] ); } } ); control.container.find( '.menu-item-data-parent-id' ).val( to.menu_item_parent ); // Handle UI updates when the position or depth (parent) change. if ( to.position !== from.position \|\| to.menu_item_parent !== from.menu_item_parent ) { control.getMenuControl().debouncedReflowMenuItems(); } } }); // Style the URL field as invalid when there is an invalid_url notification. updateNotifications = function() { control.elements.url.element.toggleClass( 'invalid', control.setting.notifications.has( 'invalid_url' ) ); }; control.setting.notifications.bind( 'add', updateNotifications ); control.setting.notifications.bind( 'removed', updateNotifications ); }, /* * Set up event handlers for menu item deletion. / _setupRemoveUI: function() { var control = this, $removeBtn; // Configure delete button. $removeBtn = control.container.find( '.item-delete' ); $removeBtn.on( 'click', function() { // Find an adjacent element to add focus to when this menu item goes away. var addingItems = true, $adjacentFocusTarget, $next, $prev, instanceCounter = 0, // Instance count of the menu item deleted. deleteItemOriginalItemId = control.params.original_item_id, addedItems = control.getMenuControl().$sectionContent.find( '.menu-item' ), availableMenuItem; if ( ! $( 'body' ).hasClass( 'adding-menu-items' ) ) { addingItems = false; } $next = control.container.nextAll( '.customize-control-nav_menu_item:visible' ).first(); $prev = control.container.prevAll( '.customize-control-nav_menu_item:visible' ).first(); if ( $next.length ) { $adjacentFocusTarget = $next.find( false === addingItems ? '.item-edit' : '.item-delete' ).first(); } else if ( $prev.length ) { $adjacentFocusTarget = $prev.find( false === addingItems ? '.item-edit' : '.item-delete' ).first(); } else { $adjacentFocusTarget = control.container.nextAll( '.customize-control-nav_menu' ).find( '.add-new-menu-item' ).first(); } / * If the menu item deleted is the only of its instance left, * remove the check icon of this menu item in the right panel. / _.each( addedItems, function( addedItem ) { var menuItemId, menuItemControl, matches; // This is because menu item that's deleted is just hidden. if ( ! $( addedItem ).is( ':visible' ) ) { return; } matches = addedItem.getAttribute( 'id' ).match( /^customize-control-nav_menu_item-(-?\d+)$/, '' ); if ( ! matches ) { return; } menuItemId = parseInt( matches[1], 10 ); menuItemControl = api.control( 'nav_menu_item[' + String( menuItemId ) + ']' ); // Check for duplicate menu items. if ( menuItemControl && deleteItemOriginalItemId == menuItemControl.params.original_item_id ) { instanceCounter++; } } ); if ( instanceCounter <= 1 ) { // Revert the check icon to add icon. availableMenuItem = $( '#menu-item-tpl-' + control.params.original_item_id ); availableMenuItem.removeClass( 'selected' ); availableMenuItem.find( '.menu-item-handle' ).removeClass( 'item-added' ); } control.container.slideUp( function() { control.setting.set( false ); wp.a11y.speak( api.Menus.data.l10n.itemDeleted ); $adjacentFocusTarget.focus(); // Keyboard accessibility. } ); control.setting.set( false ); } ); }, _setupLinksUI: function() { var $origBtn; // Configure original link. $origBtn = this.container.find( 'a.original-link' ); $origBtn.on( 'click', function( e ) { e.preventDefault(); api.previewer.previewUrl( e.target.toString() ); } ); }, /* * Update item handle title when changed. / _setupTitleUI: function() { var control = this, titleEl; // Ensure that whitespace is trimmed on blur so placeholder can be shown. control.container.find( '.edit-menu-item-title' ).on( 'blur', function() { $( this ).val( $.trim( $( this ).val() ) ); } ); titleEl = control.container.find( '.menu-item-title' ); control.setting.bind( function( item ) { var trimmedTitle, titleText; if ( ! item ) { return; } trimmedTitle = $.trim( item.title ); titleText = trimmedTitle \|\| item.original_title \|\| api.Menus.data.l10n.untitled; if ( item._invalid ) { titleText = api.Menus.data.l10n.invalidTitleTpl.replace( '%s', titleText ); } // Don't update to an empty title. if ( trimmedTitle \|\| item.original_title ) { titleEl .text( titleText ) .removeClass( 'no-title' ); } else { titleEl .text( titleText ) .addClass( 'no-title' ); } } ); }, /* * * @return {number} / getDepth: function() { var control = this, setting = control.setting(), depth = 0; if ( ! setting ) { return 0; } while ( setting && setting.menu_item_parent ) { depth += 1; control = api.control( 'nav_menu_item[' + setting.menu_item_parent + ']' ); if ( ! control ) { break; } setting = control.setting(); } return depth; }, /* * Amend the control's params with the data necessary for the JS template just in time. / renderContent: function() { var control = this, settingValue = control.setting(), containerClasses; control.params.title = settingValue.title \|\| ''; control.params.depth = control.getDepth(); control.container.data( 'item-depth', control.params.depth ); containerClasses = [ 'menu-item', 'menu-item-depth-' + String( control.params.depth ), 'menu-item-' + settingValue.object, 'menu-item-edit-inactive' ]; if ( settingValue._invalid ) { containerClasses.push( 'menu-item-invalid' ); control.params.title = api.Menus.data.l10n.invalidTitleTpl.replace( '%s', control.params.title ); } else if ( 'draft' === settingValue.status ) { containerClasses.push( 'pending' ); control.params.title = api.Menus.data.pendingTitleTpl.replace( '%s', control.params.title ); } control.params.el_classes = containerClasses.join( ' ' ); control.params.item_type_label = settingValue.type_label; control.params.item_type = settingValue.type; control.params.url = settingValue.url; control.params.target = settingValue.target; control.params.attr_title = settingValue.attr_title; control.params.classes = _.isArray( settingValue.classes ) ? settingValue.classes.join( ' ' ) : settingValue.classes; control.params.xfn = settingValue.xfn; control.params.description = settingValue.description; control.params.parent = settingValue.menu_item_parent; control.params.original_title = settingValue.original_title \|\| ''; control.container.addClass( control.params.el_classes ); api.Control.prototype.renderContent.call( control ); }, /********************************************************************** * Begin public API methods ********************************************************************/ / * @return {wp.customize.controlConstructor.nav_menu\|null} / getMenuControl: function() { var control = this, settingValue = control.setting(); if ( settingValue && settingValue.nav_menu_term_id ) { return api.control( 'nav_menu[' + settingValue.nav_menu_term_id + ']' ); } else { return null; } }, /* * Expand the accordion section containing a control / expandControlSection: function() { var $section = this.container.closest( '.accordion-section' ); if ( ! $section.hasClass( 'open' ) ) { $section.find( '.accordion-section-title:first' ).trigger( 'click' ); } }, /* * @since 4.6.0 * * @param {Boolean} expanded * @param {Object} [params] * @return {Boolean} False if state already applied. / _toggleExpanded: api.Section.prototype._toggleExpanded, /* * @since 4.6.0 * * @param {Object} [params] * @return {Boolean} False if already expanded. / expand: api.Section.prototype.expand, /* * Expand the menu item form control. * * @since 4.5.0 Added params.completeCallback. * * @param {Object} [params] - Optional params. * @param {Function} [params.completeCallback] - Function to call when the form toggle has finished animating. / expandForm: function( params ) { this.expand( params ); }, /* * @since 4.6.0 * * @param {Object} [params] * @return {Boolean} False if already collapsed. / collapse: api.Section.prototype.collapse, /* * Collapse the menu item form control. * * @since 4.5.0 Added params.completeCallback. * * @param {Object} [params] - Optional params. * @param {Function} [params.completeCallback] - Function to call when the form toggle has finished animating. / collapseForm: function( params ) { this.collapse( params ); }, /* * Expand or collapse the menu item control. * * @deprecated this is poor naming, and it is better to directly set control.expanded( showOrHide ) * @since 4.5.0 Added params.completeCallback. * * @param {boolean} [showOrHide] - If not supplied, will be inverse of current visibility * @param {Object} [params] - Optional params. * @param {Function} [params.completeCallback] - Function to call when the form toggle has finished animating. / toggleForm: function( showOrHide, params ) { if ( typeof showOrHide === 'undefined' ) { showOrHide = ! this.expanded(); } if ( showOrHide ) { this.expand( params ); } else { this.collapse( params ); } }, /* * Expand or collapse the menu item control. * * @since 4.6.0 * @param {boolean} [showOrHide] - If not supplied, will be inverse of current visibility * @param {Object} [params] - Optional params. * @param {Function} [params.completeCallback] - Function to call when the form toggle has finished animating. / onChangeExpanded: function( showOrHide, params ) { var self = this, $menuitem, $inside, complete; $menuitem = this.container; $inside = $menuitem.find( '.menu-item-settings:first' ); if ( 'undefined' === typeof showOrHide ) { showOrHide = ! $inside.is( ':visible' ); } // Already expanded or collapsed. if ( $inside.is( ':visible' ) === showOrHide ) { if ( params && params.completeCallback ) { params.completeCallback(); } return; } if ( showOrHide ) { // Close all other menu item controls before expanding this one. api.control.each( function( otherControl ) { if ( self.params.type === otherControl.params.type && self !== otherControl ) { otherControl.collapseForm(); } } ); complete = function() { $menuitem .removeClass( 'menu-item-edit-inactive' ) .addClass( 'menu-item-edit-active' ); self.container.trigger( 'expanded' ); if ( params && params.completeCallback ) { params.completeCallback(); } }; $menuitem.find( '.item-edit' ).attr( 'aria-expanded', 'true' ); $inside.slideDown( 'fast', complete ); self.container.trigger( 'expand' ); } else { complete = function() { $menuitem .addClass( 'menu-item-edit-inactive' ) .removeClass( 'menu-item-edit-active' ); self.container.trigger( 'collapsed' ); if ( params && params.completeCallback ) { params.completeCallback(); } }; self.container.trigger( 'collapse' ); $menuitem.find( '.item-edit' ).attr( 'aria-expanded', 'false' ); $inside.slideUp( 'fast', complete ); } }, /* * Expand the containing menu section, expand the form, and focus on * the first input in the control. * * @since 4.5.0 Added params.completeCallback. * * @param {Object} [params] - Params object. * @param {Function} [params.completeCallback] - Optional callback function when focus has completed. / focus: function( params ) { params = params \|\| {}; var control = this, originalCompleteCallback = params.completeCallback, focusControl; focusControl = function() { control.expandControlSection(); params.completeCallback = function() { var focusable; // Note that we can't use :focusable due to a jQuery UI issue. See: https://github.com/jquery/jquery-ui/pull/1583 focusable = control.container.find( '.menu-item-settings' ).find( 'input, select, textarea, button, object, a[href], [tabindex]' ).filter( ':visible' ); focusable.first().focus(); if ( originalCompleteCallback ) { originalCompleteCallback(); } }; control.expandForm( params ); }; if ( api.section.has( control.section() ) ) { api.section( control.section() ).expand( { completeCallback: focusControl } ); } else { focusControl(); } }, /* * Move menu item up one in the menu. / moveUp: function() { this._changePosition( -1 ); wp.a11y.speak( api.Menus.data.l10n.movedUp ); }, /* * Move menu item up one in the menu. / moveDown: function() { this._changePosition( 1 ); wp.a11y.speak( api.Menus.data.l10n.movedDown ); }, /* * Move menu item and all children up one level of depth. / moveLeft: function() { this._changeDepth( -1 ); wp.a11y.speak( api.Menus.data.l10n.movedLeft ); }, /* * Move menu item and children one level deeper, as a submenu of the previous item. / moveRight: function() { this._changeDepth( 1 ); wp.a11y.speak( api.Menus.data.l10n.movedRight ); }, /* * Note that this will trigger a UI update, causing child items to * move as well and cardinal order class names to be updated. * * @private * * @param {number} offset 1\|-1 / _changePosition: function( offset ) { var control = this, adjacentSetting, settingValue = _.clone( control.setting() ), siblingSettings = [], realPosition; if ( 1 !== offset && -1 !== offset ) { throw new Error( 'Offset changes by 1 are only supported.' ); } // Skip moving deleted items. if ( ! control.setting() ) { return; } // Locate the other items under the same parent (siblings). _( control.getMenuControl().getMenuItemControls() ).each(function( otherControl ) { if ( otherControl.setting().menu_item_parent === settingValue.menu_item_parent ) { siblingSettings.push( otherControl.setting ); } }); siblingSettings.sort(function( a, b ) { return a().position - b().position; }); realPosition = _.indexOf( siblingSettings, control.setting ); if ( -1 === realPosition ) { throw new Error( 'Expected setting to be among siblings.' ); } // Skip doing anything if the item is already at the edge in the desired direction. if ( ( realPosition === 0 && offset < 0 ) \|\| ( realPosition === siblingSettings.length - 1 && offset > 0 ) ) { // @todo Should we allow a menu item to be moved up to break it out of a parent? Adopt with previous or following parent? return; } // Update any adjacent menu item setting to take on this item's position. adjacentSetting = siblingSettings[ realPosition + offset ]; if ( adjacentSetting ) { adjacentSetting.set( $.extend( _.clone( adjacentSetting() ), { position: settingValue.position } ) ); } settingValue.position += offset; control.setting.set( settingValue ); }, /* * Note that this will trigger a UI update, causing child items to * move as well and cardinal order class names to be updated. * * @private * * @param {number} offset 1\|-1 / _changeDepth: function( offset ) { if ( 1 !== offset && -1 !== offset ) { throw new Error( 'Offset changes by 1 are only supported.' ); } var control = this, settingValue = _.clone( control.setting() ), siblingControls = [], realPosition, siblingControl, parentControl; // Locate the other items under the same parent (siblings). _( control.getMenuControl().getMenuItemControls() ).each(function( otherControl ) { if ( otherControl.setting().menu_item_parent === settingValue.menu_item_parent ) { siblingControls.push( otherControl ); } }); siblingControls.sort(function( a, b ) { return a.setting().position - b.setting().position; }); realPosition = _.indexOf( siblingControls, control ); if ( -1 === realPosition ) { throw new Error( 'Expected control to be among siblings.' ); } if ( -1 === offset ) { // Skip moving left an item that is already at the top level. if ( ! settingValue.menu_item_parent ) { return; } parentControl = api.control( 'nav_menu_item[' + settingValue.menu_item_parent + ']' ); // Make this control the parent of all the following siblings. _( siblingControls ).chain().slice( realPosition ).each(function( siblingControl, i ) { siblingControl.setting.set( $.extend( {}, siblingControl.setting(), { menu_item_parent: control.params.menu_item_id, position: i } ) ); }); // Increase the positions of the parent item's subsequent children to make room for this one. _( control.getMenuControl().getMenuItemControls() ).each(function( otherControl ) { var otherControlSettingValue, isControlToBeShifted; isControlToBeShifted = ( otherControl.setting().menu_item_parent === parentControl.setting().menu_item_parent && otherControl.setting().position > parentControl.setting().position ); if ( isControlToBeShifted ) { otherControlSettingValue = _.clone( otherControl.setting() ); otherControl.setting.set( $.extend( otherControlSettingValue, { position: otherControlSettingValue.position + 1 } ) ); } }); // Make this control the following sibling of its parent item. settingValue.position = parentControl.setting().position + 1; settingValue.menu_item_parent = parentControl.setting().menu_item_parent; control.setting.set( settingValue ); } else if ( 1 === offset ) { // Skip moving right an item that doesn't have a previous sibling. if ( realPosition === 0 ) { return; } // Make the control the last child of the previous sibling. siblingControl = siblingControls[ realPosition - 1 ]; settingValue.menu_item_parent = siblingControl.params.menu_item_id; settingValue.position = 0; _( control.getMenuControl().getMenuItemControls() ).each(function( otherControl ) { if ( otherControl.setting().menu_item_parent === settingValue.menu_item_parent ) { settingValue.position = Math.max( settingValue.position, otherControl.setting().position ); } }); settingValue.position += 1; control.setting.set( settingValue ); } } } ); /* * wp.customize.Menus.MenuNameControl * * Customizer control for a nav menu's name. * * @class wp.customize.Menus.MenuNameControl * @augments wp.customize.Control / api.Menus.MenuNameControl = api.Control.extend(/* @lends wp.customize.Menus.MenuNameControl.prototype /{ ready: function() { var control = this; if ( control.setting ) { var settingValue = control.setting(); control.nameElement = new api.Element( control.container.find( '.menu-name-field' ) ); control.nameElement.bind(function( value ) { var settingValue = control.setting(); if ( settingValue && settingValue.name !== value ) { settingValue = _.clone( settingValue ); settingValue.name = value; control.setting.set( settingValue ); } }); if ( settingValue ) { control.nameElement.set( settingValue.name ); } control.setting.bind(function( object ) { if ( object ) { control.nameElement.set( object.name ); } }); } } }); /* * wp.customize.Menus.MenuLocationsControl * * Customizer control for a nav menu's locations. * * @since 4.9.0 * @class wp.customize.Menus.MenuLocationsControl * @augments wp.customize.Control / api.Menus.MenuLocationsControl = api.Control.extend(/* @lends wp.customize.Menus.MenuLocationsControl.prototype /{ /* * Set up the control. * * @since 4.9.0 / ready: function () { var control = this; control.container.find( '.assigned-menu-location' ).each(function() { var container = $( this ), checkbox = container.find( 'input[type=checkbox]' ), element = new api.Element( checkbox ), navMenuLocationSetting = api( 'nav_menu_locations[' + checkbox.data( 'location-id' ) + ']' ), isNewMenu = control.params.menu_id === '', updateCheckbox = isNewMenu ? _.noop : function( checked ) { element.set( checked ); }, updateSetting = isNewMenu ? _.noop : function( checked ) { navMenuLocationSetting.set( checked ? control.params.menu_id : 0 ); }, updateSelectedMenuLabel = function( selectedMenuId ) { var menuSetting = api( 'nav_menu[' + String( selectedMenuId ) + ']' ); if ( ! selectedMenuId \|\| ! menuSetting \|\| ! menuSetting() ) { container.find( '.theme-location-set' ).hide(); } else { container.find( '.theme-location-set' ).show().find( 'span' ).text( displayNavMenuName( menuSetting().name ) ); } }; updateCheckbox( navMenuLocationSetting.get() === control.params.menu_id ); checkbox.on( 'change', function() { // Note: We can't use element.bind( function( checked ){ ... } ) here because it will trigger a change as well. updateSetting( this.checked ); } ); navMenuLocationSetting.bind( function( selectedMenuId ) { updateCheckbox( selectedMenuId === control.params.menu_id ); updateSelectedMenuLabel( selectedMenuId ); } ); updateSelectedMenuLabel( navMenuLocationSetting.get() ); }); }, /* * Set the selected locations. * * This method sets the selected locations and allows us to do things like * set the default location for a new menu. * * @since 4.9.0 * * @param {Object.<string,boolean>} selections - A map of location selections. * @return {void} / setSelections: function( selections ) { this.container.find( '.menu-location' ).each( function( i, checkboxNode ) { var locationId = checkboxNode.dataset.locationId; checkboxNode.checked = locationId in selections ? selections[ locationId ] : false; } ); } }); /* * wp.customize.Menus.MenuAutoAddControl * * Customizer control for a nav menu's auto add. * * @class wp.customize.Menus.MenuAutoAddControl * @augments wp.customize.Control / api.Menus.MenuAutoAddControl = api.Control.extend(/* @lends wp.customize.Menus.MenuAutoAddControl.prototype /{ ready: function() { var control = this, settingValue = control.setting(); / * Since the control is not registered in PHP, we need to prevent the * preview's sending of the activeControls to result in this control * being deactivated. / control.active.validate = function() { var value, section = api.section( control.section() ); if ( section ) { value = section.active(); } else { value = false; } return value; }; control.autoAddElement = new api.Element( control.container.find( 'input[type=checkbox].auto_add' ) ); control.autoAddElement.bind(function( value ) { var settingValue = control.setting(); if ( settingValue && settingValue.name !== value ) { settingValue = _.clone( settingValue ); settingValue.auto_add = value; control.setting.set( settingValue ); } }); if ( settingValue ) { control.autoAddElement.set( settingValue.auto_add ); } control.setting.bind(function( object ) { if ( object ) { control.autoAddElement.set( object.auto_add ); } }); } }); /* * wp.customize.Menus.MenuControl * * Customizer control for menus. * Note that 'nav_menu' must match the WP_Menu_Customize_Control::$type * * @class wp.customize.Menus.MenuControl * @augments wp.customize.Control / api.Menus.MenuControl = api.Control.extend(/* @lends wp.customize.Menus.MenuControl.prototype /{ /* * Set up the control. / ready: function() { var control = this, section = api.section( control.section() ), menuId = control.params.menu_id, menu = control.setting(), name, widgetTemplate, select; if ( 'undefined' === typeof this.params.menu_id ) { throw new Error( 'params.menu_id was not defined' ); } / * Since the control is not registered in PHP, we need to prevent the * preview's sending of the activeControls to result in this control * being deactivated. / control.active.validate = function() { var value; if ( section ) { value = section.active(); } else { value = false; } return value; }; control.$controlSection = section.headContainer; control.$sectionContent = control.container.closest( '.accordion-section-content' ); this._setupModel(); api.section( control.section(), function( section ) { section.deferred.initSortables.done(function( menuList ) { control._setupSortable( menuList ); }); } ); this._setupAddition(); this._setupTitle(); // Add menu to Navigation Menu widgets. if ( menu ) { name = displayNavMenuName( menu.name ); // Add the menu to the existing controls. api.control.each( function( widgetControl ) { if ( ! widgetControl.extended( api.controlConstructor.widget_form ) \|\| 'nav_menu' !== widgetControl.params.widget_id_base ) { return; } widgetControl.container.find( '.nav-menu-widget-form-controls:first' ).show(); widgetControl.container.find( '.nav-menu-widget-no-menus-message:first' ).hide(); select = widgetControl.container.find( 'select' ); if ( 0 === select.find( 'option[value=' + String( menuId ) + ']' ).length ) { select.append( new Option( name, menuId ) ); } } ); // Add the menu to the widget template. widgetTemplate = $( '#available-widgets-list .widget-tpl:has( input.id_base[ value=nav_menu ] )' ); widgetTemplate.find( '.nav-menu-widget-form-controls:first' ).show(); widgetTemplate.find( '.nav-menu-widget-no-menus-message:first' ).hide(); select = widgetTemplate.find( '.widget-inside select:first' ); if ( 0 === select.find( 'option[value=' + String( menuId ) + ']' ).length ) { select.append( new Option( name, menuId ) ); } } / * Wait for menu items to be added. * Ideally, we'd bind to an event indicating construction is complete, * but deferring appears to be the best option today. / _.defer( function () { control.updateInvitationVisibility(); } ); }, /* * Update ordering of menu item controls when the setting is updated. / _setupModel: function() { var control = this, menuId = control.params.menu_id; control.setting.bind( function( to ) { var name; if ( false === to ) { control._handleDeletion(); } else { // Update names in the Navigation Menu widgets. name = displayNavMenuName( to.name ); api.control.each( function( widgetControl ) { if ( ! widgetControl.extended( api.controlConstructor.widget_form ) \|\| 'nav_menu' !== widgetControl.params.widget_id_base ) { return; } var select = widgetControl.container.find( 'select' ); select.find( 'option[value=' + String( menuId ) + ']' ).text( name ); }); } } ); }, /* * Allow items in each menu to be re-ordered, and for the order to be previewed. * * Notice that the UI aspects here are handled by wpNavMenu.initSortables() * which is called in MenuSection.onChangeExpanded() * * @param {Object} menuList - The element that has sortable(). / _setupSortable: function( menuList ) { var control = this; if ( ! menuList.is( control.$sectionContent ) ) { throw new Error( 'Unexpected menuList.' ); } menuList.on( 'sortstart', function() { control.isSorting = true; }); menuList.on( 'sortstop', function() { setTimeout( function() { // Next tick. var menuItemContainerIds = control.$sectionContent.sortable( 'toArray' ), menuItemControls = [], position = 0, priority = 10; control.isSorting = false; // Reset horizontal scroll position when done dragging. control.$sectionContent.scrollLeft( 0 ); _.each( menuItemContainerIds, function( menuItemContainerId ) { var menuItemId, menuItemControl, matches; matches = menuItemContainerId.match( /^customize-control-nav_menu_item-(-?\d+)$/, '' ); if ( ! matches ) { return; } menuItemId = parseInt( matches[1], 10 ); menuItemControl = api.control( 'nav_menu_item[' + String( menuItemId ) + ']' ); if ( menuItemControl ) { menuItemControls.push( menuItemControl ); } } ); _.each( menuItemControls, function( menuItemControl ) { if ( false === menuItemControl.setting() ) { // Skip deleted items. return; } var setting = _.clone( menuItemControl.setting() ); position += 1; priority += 1; setting.position = position; menuItemControl.priority( priority ); // Note that wpNavMenu will be setting this .menu-item-data-parent-id input's value. setting.menu_item_parent = parseInt( menuItemControl.container.find( '.menu-item-data-parent-id' ).val(), 10 ); if ( ! setting.menu_item_parent ) { setting.menu_item_parent = 0; } menuItemControl.setting.set( setting ); }); }); }); control.isReordering = false; /* * Keyboard-accessible reordering. / this.container.find( '.reorder-toggle' ).on( 'click', function() { control.toggleReordering( ! control.isReordering ); } ); }, /* * Set up UI for adding a new menu item. / _setupAddition: function() { var self = this; this.container.find( '.add-new-menu-item' ).on( 'click', function( event ) { if ( self.$sectionContent.hasClass( 'reordering' ) ) { return; } if ( ! $( 'body' ).hasClass( 'adding-menu-items' ) ) { $( this ).attr( 'aria-expanded', 'true' ); api.Menus.availableMenuItemsPanel.open( self ); } else { $( this ).attr( 'aria-expanded', 'false' ); api.Menus.availableMenuItemsPanel.close(); event.stopPropagation(); } } ); }, _handleDeletion: function() { var control = this, section, menuId = control.params.menu_id, removeSection, widgetTemplate, navMenuCount = 0; section = api.section( control.section() ); removeSection = function() { section.container.remove(); api.section.remove( section.id ); }; if ( section && section.expanded() ) { section.collapse({ completeCallback: function() { removeSection(); wp.a11y.speak( api.Menus.data.l10n.menuDeleted ); api.panel( 'nav_menus' ).focus(); } }); } else { removeSection(); } api.each(function( setting ) { if ( /^nav_menu\[/.test( setting.id ) && false !== setting() ) { navMenuCount += 1; } }); // Remove the menu from any Navigation Menu widgets. api.control.each(function( widgetControl ) { if ( ! widgetControl.extended( api.controlConstructor.widget_form ) \|\| 'nav_menu' !== widgetControl.params.widget_id_base ) { return; } var select = widgetControl.container.find( 'select' ); if ( select.val() === String( menuId ) ) { select.prop( 'selectedIndex', 0 ).trigger( 'change' ); } widgetControl.container.find( '.nav-menu-widget-form-controls:first' ).toggle( 0 !== navMenuCount ); widgetControl.container.find( '.nav-menu-widget-no-menus-message:first' ).toggle( 0 === navMenuCount ); widgetControl.container.find( 'option[value=' + String( menuId ) + ']' ).remove(); }); // Remove the menu to the nav menu widget template. widgetTemplate = $( '#available-widgets-list .widget-tpl:has( input.id_base[ value=nav_menu ] )' ); widgetTemplate.find( '.nav-menu-widget-form-controls:first' ).toggle( 0 !== navMenuCount ); widgetTemplate.find( '.nav-menu-widget-no-menus-message:first' ).toggle( 0 === navMenuCount ); widgetTemplate.find( 'option[value=' + String( menuId ) + ']' ).remove(); }, /* * Update Section Title as menu name is changed. / _setupTitle: function() { var control = this; control.setting.bind( function( menu ) { if ( ! menu ) { return; } var section = api.section( control.section() ), menuId = control.params.menu_id, controlTitle = section.headContainer.find( '.accordion-section-title' ), sectionTitle = section.contentContainer.find( '.customize-section-title h3' ), location = section.headContainer.find( '.menu-in-location' ), action = sectionTitle.find( '.customize-action' ), name = displayNavMenuName( menu.name ); // Update the control title. controlTitle.text( name ); if ( location.length ) { location.appendTo( controlTitle ); } // Update the section title. sectionTitle.text( name ); if ( action.length ) { action.prependTo( sectionTitle ); } // Update the nav menu name in location selects. api.control.each( function( control ) { if ( /^nav_menu_locations\[/.test( control.id ) ) { control.container.find( 'option[value=' + menuId + ']' ).text( name ); } } ); // Update the nav menu name in all location checkboxes. section.contentContainer.find( '.customize-control-checkbox input' ).each( function() { if ( $( this ).prop( 'checked' ) ) { $( '.current-menu-location-name-' + $( this ).data( 'location-id' ) ).text( name ); } } ); } ); }, /********************************************************************** * Begin public API methods ********************************************************************/ / * Enable/disable the reordering UI * * @param {boolean} showOrHide to enable/disable reordering / toggleReordering: function( showOrHide ) { var addNewItemBtn = this.container.find( '.add-new-menu-item' ), reorderBtn = this.container.find( '.reorder-toggle' ), itemsTitle = this.$sectionContent.find( '.item-title' ); showOrHide = Boolean( showOrHide ); if ( showOrHide === this.$sectionContent.hasClass( 'reordering' ) ) { return; } this.isReordering = showOrHide; this.$sectionContent.toggleClass( 'reordering', showOrHide ); this.$sectionContent.sortable( this.isReordering ? 'disable' : 'enable' ); if ( this.isReordering ) { addNewItemBtn.attr({ 'tabindex': '-1', 'aria-hidden': 'true' }); reorderBtn.attr( 'aria-label', api.Menus.data.l10n.reorderLabelOff ); wp.a11y.speak( api.Menus.data.l10n.reorderModeOn ); itemsTitle.attr( 'aria-hidden', 'false' ); } else { addNewItemBtn.removeAttr( 'tabindex aria-hidden' ); reorderBtn.attr( 'aria-label', api.Menus.data.l10n.reorderLabelOn ); wp.a11y.speak( api.Menus.data.l10n.reorderModeOff ); itemsTitle.attr( 'aria-hidden', 'true' ); } if ( showOrHide ) { _( this.getMenuItemControls() ).each( function( formControl ) { formControl.collapseForm(); } ); } }, /* * @return {wp.customize.controlConstructor.nav_menu_item[]} / getMenuItemControls: function() { var menuControl = this, menuItemControls = [], menuTermId = menuControl.params.menu_id; api.control.each(function( control ) { if ( 'nav_menu_item' === control.params.type && control.setting() && menuTermId === control.setting().nav_menu_term_id ) { menuItemControls.push( control ); } }); return menuItemControls; }, /* * Make sure that each menu item control has the proper depth. / reflowMenuItems: function() { var menuControl = this, menuItemControls = menuControl.getMenuItemControls(), reflowRecursively; reflowRecursively = function( context ) { var currentMenuItemControls = [], thisParent = context.currentParent; _.each( context.menuItemControls, function( menuItemControl ) { if ( thisParent === menuItemControl.setting().menu_item_parent ) { currentMenuItemControls.push( menuItemControl ); // @todo We could remove this item from menuItemControls now, for efficiency. } }); currentMenuItemControls.sort( function( a, b ) { return a.setting().position - b.setting().position; }); _.each( currentMenuItemControls, function( menuItemControl ) { // Update position. context.currentAbsolutePosition += 1; menuItemControl.priority.set( context.currentAbsolutePosition ); // This will change the sort order. // Update depth. if ( ! menuItemControl.container.hasClass( 'menu-item-depth-' + String( context.currentDepth ) ) ) { _.each( menuItemControl.container.prop( 'className' ).match( /menu-item-depth-\d+/g ), function( className ) { menuItemControl.container.removeClass( className ); }); menuItemControl.container.addClass( 'menu-item-depth-' + String( context.currentDepth ) ); } menuItemControl.container.data( 'item-depth', context.currentDepth ); // Process any children items. context.currentDepth += 1; context.currentParent = menuItemControl.params.menu_item_id; reflowRecursively( context ); context.currentDepth -= 1; context.currentParent = thisParent; }); // Update class names for reordering controls. if ( currentMenuItemControls.length ) { _( currentMenuItemControls ).each(function( menuItemControl ) { menuItemControl.container.removeClass( 'move-up-disabled move-down-disabled move-left-disabled move-right-disabled' ); if ( 0 === context.currentDepth ) { menuItemControl.container.addClass( 'move-left-disabled' ); } else if ( 10 === context.currentDepth ) { menuItemControl.container.addClass( 'move-right-disabled' ); } }); currentMenuItemControls[0].container .addClass( 'move-up-disabled' ) .addClass( 'move-right-disabled' ) .toggleClass( 'move-down-disabled', 1 === currentMenuItemControls.length ); currentMenuItemControls[ currentMenuItemControls.length - 1 ].container .addClass( 'move-down-disabled' ) .toggleClass( 'move-up-disabled', 1 === currentMenuItemControls.length ); } }; reflowRecursively( { menuItemControls: menuItemControls, currentParent: 0, currentDepth: 0, currentAbsolutePosition: 0 } ); menuControl.updateInvitationVisibility( menuItemControls ); menuControl.container.find( '.reorder-toggle' ).toggle( menuItemControls.length > 1 ); }, /* * Note that this function gets debounced so that when a lot of setting * changes are made at once, for instance when moving a menu item that * has child items, this function will only be called once all of the * settings have been updated. / debouncedReflowMenuItems: _.debounce( function() { this.reflowMenuItems.apply( this, arguments ); }, 0 ), /* * Add a new item to this menu. * * @param {Object} item - Value for the nav_menu_item setting to be created. * @return {wp.customize.Menus.controlConstructor.nav_menu_item} The newly-created nav_menu_item control instance. / addItemToMenu: function( item ) { var menuControl = this, customizeId, settingArgs, setting, menuItemControl, placeholderId, position = 0, priority = 10, originalItemId = item.id \|\| ''; _.each( menuControl.getMenuItemControls(), function( control ) { if ( false === control.setting() ) { return; } priority = Math.max( priority, control.priority() ); if ( 0 === control.setting().menu_item_parent ) { position = Math.max( position, control.setting().position ); } }); position += 1; priority += 1; item = $.extend( {}, api.Menus.data.defaultSettingValues.nav_menu_item, item, { nav_menu_term_id: menuControl.params.menu_id, original_title: item.title, position: position } ); delete item.id; // Only used by Backbone. placeholderId = api.Menus.generatePlaceholderAutoIncrementId(); customizeId = 'nav_menu_item[' + String( placeholderId ) + ']'; settingArgs = { type: 'nav_menu_item', transport: api.Menus.data.settingTransport, previewer: api.previewer }; setting = api.create( customizeId, customizeId, {}, settingArgs ); setting.set( item ); // Change from initial empty object to actual item to mark as dirty. // Add the menu item control. menuItemControl = new api.controlConstructor.nav_menu_item( customizeId, { type: 'nav_menu_item', section: menuControl.id, priority: priority, settings: { 'default': customizeId }, menu_item_id: placeholderId, original_item_id: originalItemId } ); api.control.add( menuItemControl ); setting.preview(); menuControl.debouncedReflowMenuItems(); wp.a11y.speak( api.Menus.data.l10n.itemAdded ); return menuItemControl; }, /* * Show an invitation to add new menu items when there are no menu items. * * @since 4.9.0 * * @param {wp.customize.controlConstructor.nav_menu_item[]} optionalMenuItemControls / updateInvitationVisibility: function ( optionalMenuItemControls ) { var menuItemControls = optionalMenuItemControls \|\| this.getMenuItemControls(); this.container.find( '.new-menu-item-invitation' ).toggle( menuItemControls.length === 0 ); } } ); /* * Extends wp.customize.controlConstructor with control constructor for * menu_location, menu_item, nav_menu, and new_menu. / $.extend( api.controlConstructor, { nav_menu_location: api.Menus.MenuLocationControl, nav_menu_item: api.Menus.MenuItemControl, nav_menu: api.Menus.MenuControl, nav_menu_name: api.Menus.MenuNameControl, nav_menu_locations: api.Menus.MenuLocationsControl, nav_menu_auto_add: api.Menus.MenuAutoAddControl }); /* * Extends wp.customize.panelConstructor with section constructor for menus. / $.extend( api.panelConstructor, { nav_menus: api.Menus.MenusPanel }); /* * Extends wp.customize.sectionConstructor with section constructor for menu. / $.extend( api.sectionConstructor, { nav_menu: api.Menus.MenuSection, new_menu: api.Menus.NewMenuSection }); /* * Init Customizer for menus. / api.bind( 'ready', function() { // Set up the menu items panel. api.Menus.availableMenuItemsPanel = new api.Menus.AvailableMenuItemsPanelView({ collection: api.Menus.availableMenuItems }); api.bind( 'saved', function( data ) { if ( data.nav_menu_updates \|\| data.nav_menu_item_updates ) { api.Menus.applySavedData( data ); } } ); / * Reset the list of posts created in the customizer once published. * The setting is updated quietly (bypassing events being triggered) * so that the customized state doesn't become immediately dirty. / api.state( 'changesetStatus' ).bind( function( status ) { if ( 'publish' === status ) { api( 'nav_menus_created_posts' )._value = []; } } ); // Open and focus menu control. api.previewer.bind( 'focus-nav-menu-item-control', api.Menus.focusMenuItemControl ); } ); /* * When customize_save comes back with a success, make sure any inserted * nav menus and items are properly re-added with their newly-assigned IDs. * * @alias wp.customize.Menus.applySavedData * * @param {Object} data * @param {Array} data.nav_menu_updates * @param {Array} data.nav_menu_item_updates / api.Menus.applySavedData = function( data ) { var insertedMenuIdMapping = {}, insertedMenuItemIdMapping = {}; _( data.nav_menu_updates ).each(function( update ) { var oldCustomizeId, newCustomizeId, customizeId, oldSetting, newSetting, setting, settingValue, oldSection, newSection, wasSaved, widgetTemplate, navMenuCount, shouldExpandNewSection; if ( 'inserted' === update.status ) { if ( ! update.previous_term_id ) { throw new Error( 'Expected previous_term_id' ); } if ( ! update.term_id ) { throw new Error( 'Expected term_id' ); } oldCustomizeId = 'nav_menu[' + String( update.previous_term_id ) + ']'; if ( ! api.has( oldCustomizeId ) ) { throw new Error( 'Expected setting to exist: ' + oldCustomizeId ); } oldSetting = api( oldCustomizeId ); if ( ! api.section.has( oldCustomizeId ) ) { throw new Error( 'Expected control to exist: ' + oldCustomizeId ); } oldSection = api.section( oldCustomizeId ); settingValue = oldSetting.get(); if ( ! settingValue ) { throw new Error( 'Did not expect setting to be empty (deleted).' ); } settingValue = $.extend( _.clone( settingValue ), update.saved_value ); insertedMenuIdMapping[ update.previous_term_id ] = update.term_id; newCustomizeId = 'nav_menu[' + String( update.term_id ) + ']'; newSetting = api.create( newCustomizeId, newCustomizeId, settingValue, { type: 'nav_menu', transport: api.Menus.data.settingTransport, previewer: api.previewer } ); shouldExpandNewSection = oldSection.expanded(); if ( shouldExpandNewSection ) { oldSection.collapse(); } // Add the menu section. newSection = new api.Menus.MenuSection( newCustomizeId, { panel: 'nav_menus', title: settingValue.name, customizeAction: api.Menus.data.l10n.customizingMenus, type: 'nav_menu', priority: oldSection.priority.get(), menu_id: update.term_id } ); // Add new control for the new menu. api.section.add( newSection ); // Update the values for nav menus in Navigation Menu controls. api.control.each( function( setting ) { if ( ! setting.extended( api.controlConstructor.widget_form ) \|\| 'nav_menu' !== setting.params.widget_id_base ) { return; } var select, oldMenuOption, newMenuOption; select = setting.container.find( 'select' ); oldMenuOption = select.find( 'option[value=' + String( update.previous_term_id ) + ']' ); newMenuOption = select.find( 'option[value=' + String( update.term_id ) + ']' ); newMenuOption.prop( 'selected', oldMenuOption.prop( 'selected' ) ); oldMenuOption.remove(); } ); // Delete the old placeholder nav_menu. oldSetting.callbacks.disable(); // Prevent setting triggering Customizer dirty state when set. oldSetting.set( false ); oldSetting.preview(); newSetting.preview(); oldSetting._dirty = false; // Remove nav_menu section. oldSection.container.remove(); api.section.remove( oldCustomizeId ); // Update the nav_menu widget to reflect removed placeholder menu. navMenuCount = 0; api.each(function( setting ) { if ( /^nav_menu\[/.test( setting.id ) && false !== setting() ) { navMenuCount += 1; } }); widgetTemplate = $( '#available-widgets-list .widget-tpl:has( input.id_base[ value=nav_menu ] )' ); widgetTemplate.find( '.nav-menu-widget-form-controls:first' ).toggle( 0 !== navMenuCount ); widgetTemplate.find( '.nav-menu-widget-no-menus-message:first' ).toggle( 0 === navMenuCount ); widgetTemplate.find( 'option[value=' + String( update.previous_term_id ) + ']' ).remove(); // Update the nav_menu_locations[...] controls to remove the placeholder menus from the dropdown options. wp.customize.control.each(function( control ){ if ( /^nav_menu_locations\[/.test( control.id ) ) { control.container.find( 'option[value=' + String( update.previous_term_id ) + ']' ).remove(); } }); // Update nav_menu_locations to reference the new ID. api.each( function( setting ) { var wasSaved = api.state( 'saved' ).get(); if ( /^nav_menu_locations\[/.test( setting.id ) && setting.get() === update.previous_term_id ) { setting.set( update.term_id ); setting._dirty = false; // Not dirty because this is has also just been done on server in WP_Customize_Nav_Menu_Setting::update(). api.state( 'saved' ).set( wasSaved ); setting.preview(); } } ); if ( shouldExpandNewSection ) { newSection.expand(); } } else if ( 'updated' === update.status ) { customizeId = 'nav_menu[' + String( update.term_id ) + ']'; if ( ! api.has( customizeId ) ) { throw new Error( 'Expected setting to exist: ' + customizeId ); } // Make sure the setting gets updated with its sanitized server value (specifically the conflict-resolved name). setting = api( customizeId ); if ( ! _.isEqual( update.saved_value, setting.get() ) ) { wasSaved = api.state( 'saved' ).get(); setting.set( update.saved_value ); setting._dirty = false; api.state( 'saved' ).set( wasSaved ); } } } ); // Build up mapping of nav_menu_item placeholder IDs to inserted IDs. _( data.nav_menu_item_updates ).each(function( update ) { if ( update.previous_post_id ) { insertedMenuItemIdMapping[ update.previous_post_id ] = update.post_id; } }); _( data.nav_menu_item_updates ).each(function( update ) { var oldCustomizeId, newCustomizeId, oldSetting, newSetting, settingValue, oldControl, newControl; if ( 'inserted' === update.status ) { if ( ! update.previous_post_id ) { throw new Error( 'Expected previous_post_id' ); } if ( ! update.post_id ) { throw new Error( 'Expected post_id' ); } oldCustomizeId = 'nav_menu_item[' + String( update.previous_post_id ) + ']'; if ( ! api.has( oldCustomizeId ) ) { throw new Error( 'Expected setting to exist: ' + oldCustomizeId ); } oldSetting = api( oldCustomizeId ); if ( ! api.control.has( oldCustomizeId ) ) { throw new Error( 'Expected control to exist: ' + oldCustomizeId ); } oldControl = api.control( oldCustomizeId ); settingValue = oldSetting.get(); if ( ! settingValue ) { throw new Error( 'Did not expect setting to be empty (deleted).' ); } settingValue = _.clone( settingValue ); // If the parent menu item was also inserted, update the menu_item_parent to the new ID. if ( settingValue.menu_item_parent < 0 ) { if ( ! insertedMenuItemIdMapping[ settingValue.menu_item_parent ] ) { throw new Error( 'inserted ID for menu_item_parent not available' ); } settingValue.menu_item_parent = insertedMenuItemIdMapping[ settingValue.menu_item_parent ]; } // If the menu was also inserted, then make sure it uses the new menu ID for nav_menu_term_id. if ( insertedMenuIdMapping[ settingValue.nav_menu_term_id ] ) { settingValue.nav_menu_term_id = insertedMenuIdMapping[ settingValue.nav_menu_term_id ]; } newCustomizeId = 'nav_menu_item[' + String( update.post_id ) + ']'; newSetting = api.create( newCustomizeId, newCustomizeId, settingValue, { type: 'nav_menu_item', transport: api.Menus.data.settingTransport, previewer: api.previewer } ); // Add the menu control. newControl = new api.controlConstructor.nav_menu_item( newCustomizeId, { type: 'nav_menu_item', menu_id: update.post_id, section: 'nav_menu[' + String( settingValue.nav_menu_term_id ) + ']', priority: oldControl.priority.get(), settings: { 'default': newCustomizeId }, menu_item_id: update.post_id } ); // Remove old control. oldControl.container.remove(); api.control.remove( oldCustomizeId ); // Add new control to take its place. api.control.add( newControl ); // Delete the placeholder and preview the new setting. oldSetting.callbacks.disable(); // Prevent setting triggering Customizer dirty state when set. oldSetting.set( false ); oldSetting.preview(); newSetting.preview(); oldSetting._dirty = false; newControl.container.toggleClass( 'menu-item-edit-inactive', oldControl.container.hasClass( 'menu-item-edit-inactive' ) ); } }); / * Update the settings for any nav_menu widgets that had selected a placeholder ID. / _.each( data.widget_nav_menu_updates, function( widgetSettingValue, widgetSettingId ) { var setting = api( widgetSettingId ); if ( setting ) { setting._value = widgetSettingValue; setting.preview(); // Send to the preview now so that menu refresh will use the inserted menu. } }); }; /* * Focus a menu item control. * * @alias wp.customize.Menus.focusMenuItemControl * * @param {string} menuItemId / api.Menus.focusMenuItemControl = function( menuItemId ) { var control = api.Menus.getMenuItemControl( menuItemId ); if ( control ) { control.focus(); } }; /* * Get the control for a given menu. * * @alias wp.customize.Menus.getMenuControl * * @param menuId * @return {wp.customize.controlConstructor.menus[]} / api.Menus.getMenuControl = function( menuId ) { return api.control( 'nav_menu[' + menuId + ']' ); }; /* * Given a menu item ID, get the control associated with it. * * @alias wp.customize.Menus.getMenuItemControl * * @param {string} menuItemId * @return {Object\|null} / api.Menus.getMenuItemControl = function( menuItemId ) { return api.control( menuItemIdToSettingId( menuItemId ) ); }; /* * @alias wp.customize.Menus~menuItemIdToSettingId * * @param {string} menuItemId / function menuItemIdToSettingId( menuItemId ) { return 'nav_menu_item[' + menuItemId + ']'; } /* * Apply sanitize_text_field()-like logic to the supplied name, returning a * "unnammed" fallback string if the name is then empty. * * @alias wp.customize.Menus~displayNavMenuName * * @param {string} name * @return {string} */ function displayNavMenuName( name ) { name = name \|\| ''; name = wp.sanitize.stripTagsAndEncodeText( name ); // Remove any potential tags from name. name = $.trim( name ); return name \|\| api.Menus.data.l10n.unnamed; } })( wp.customize, wp, jQuery ); Back

Edit File : customize-nav-menus.js | Size : 105.83 KB

/**
 * @output wp-admin/js/customize-nav-menus.js
 */

/* global _wpCustomizeNavMenusSettings, wpNavMenu, console */
( function( api, wp, $ ) {
	'use strict';

/**
	 * Set up wpNavMenu for drag and drop.
	 */
	wpNavMenu.originalInit = wpNavMenu.init;
	wpNavMenu.options.menuItemDepthPerLevel = 20;
	wpNavMenu.options.sortableItems         = '> .customize-control-nav_menu_item';
	wpNavMenu.options.targetTolerance       = 10;
	wpNavMenu.init = function() {
		this.jQueryExtensions();
	};

/**
	 * @namespace wp.customize.Menus
	 */
	api.Menus = api.Menus || {};

// Link settings.
	api.Menus.data = {
		itemTypes: [],
		l10n: {},
		settingTransport: 'refresh',
		phpIntMax: 0,
		defaultSettingValues: {
			nav_menu: {},
			nav_menu_item: {}
		},
		locationSlugMappedToName: {}
	};
	if ( 'undefined' !== typeof _wpCustomizeNavMenusSettings ) {
		$.extend( api.Menus.data, _wpCustomizeNavMenusSettings );
	}

/**
	 * Newly-created Nav Menus and Nav Menu Items have negative integer IDs which
	 * serve as placeholders until Save & Publish happens.
	 *
	 * @alias wp.customize.Menus.generatePlaceholderAutoIncrementId
	 *
	 * @return {number}
	 */
	api.Menus.generatePlaceholderAutoIncrementId = function() {
		return -Math.ceil( api.Menus.data.phpIntMax * Math.random() );
	};

/**
	 * wp.customize.Menus.AvailableItemModel
	 *
	 * A single available menu item model. See PHP's WP_Customize_Nav_Menu_Item_Setting class.
	 *
	 * @class    wp.customize.Menus.AvailableItemModel
	 * @augments Backbone.Model
	 */
	api.Menus.AvailableItemModel = Backbone.Model.extend( $.extend(
		{
			id: null // This is only used by Backbone.
		},
		api.Menus.data.defaultSettingValues.nav_menu_item
	) );

/**
	 * wp.customize.Menus.AvailableItemCollection
	 *
	 * Collection for available menu item models.
	 *
	 * @class    wp.customize.Menus.AvailableItemCollection
	 * @augments Backbone.Collection
	 */
	api.Menus.AvailableItemCollection = Backbone.Collection.extend(/** @lends wp.customize.Menus.AvailableItemCollection.prototype */{
		model: api.Menus.AvailableItemModel,

sort_key: 'order',

comparator: function( item ) {
			return -item.get( this.sort_key );
		},

sortByField: function( fieldName ) {
			this.sort_key = fieldName;
			this.sort();
		}
	});
	api.Menus.availableMenuItems = new api.Menus.AvailableItemCollection( api.Menus.data.availableMenuItems );

/**
	 * Insert a new `auto-draft` post.
	 *
	 * @since 4.7.0
	 * @alias wp.customize.Menus.insertAutoDraftPost
	 *
	 * @param {Object} params - Parameters for the draft post to create.
	 * @param {string} params.post_type - Post type to add.
	 * @param {string} params.post_title - Post title to use.
	 * @return {jQuery.promise} Promise resolved with the added post.
	 */
	api.Menus.insertAutoDraftPost = function insertAutoDraftPost( params ) {
		var request, deferred = $.Deferred();

request = wp.ajax.post( 'customize-nav-menus-insert-auto-draft', {
			'customize-menus-nonce': api.settings.nonce['customize-menus'],
			'wp_customize': 'on',
			'customize_changeset_uuid': api.settings.changeset.uuid,
			'params': params
		} );

request.done( function( response ) {
			if ( response.post_id ) {
				api( 'nav_menus_created_posts' ).set(
					api( 'nav_menus_created_posts' ).get().concat( [ response.post_id ] )
				);

if ( 'page' === params.post_type ) {

// Activate static front page controls as this could be the first page created.
					if ( api.section.has( 'static_front_page' ) ) {
						api.section( 'static_front_page' ).activate();
					}

// Add new page to dropdown-pages controls.
					api.control.each( function( control ) {
						var select;
						if ( 'dropdown-pages' === control.params.type ) {
							select = control.container.find( 'select[name^="_customize-dropdown-pages-"]' );
							select.append( new Option( params.post_title, response.post_id ) );
						}
					} );
				}
				deferred.resolve( response );
			}
		} );

request.fail( function( response ) {
			var error = response || '';

if ( 'undefined' !== typeof response.message ) {
				error = response.message;
			}

console.error( error );
			deferred.rejectWith( error );
		} );

return deferred.promise();
	};

api.Menus.AvailableMenuItemsPanelView = wp.Backbone.View.extend(/** @lends wp.customize.Menus.AvailableMenuItemsPanelView.prototype */{

el: '#available-menu-items',

events: {
			'input #menu-items-search': 'debounceSearch',
			'focus .menu-item-tpl': 'focus',
			'click .menu-item-tpl': '_submit',
			'click #custom-menu-item-submit': '_submitLink',
			'keypress #custom-menu-item-name': '_submitLink',
			'click .new-content-item .add-content': '_submitNew',
			'keypress .create-item-input': '_submitNew',
			'keydown': 'keyboardAccessible'
		},

// Cache current selected menu item.
		selected: null,

// Cache menu control that opened the panel.
		currentMenuControl: null,
		debounceSearch: null,
		$search: null,
		$clearResults: null,
		searchTerm: '',
		rendered: false,
		pages: {},
		sectionContent: '',
		loading: false,
		addingNew: false,

/**
		 * wp.customize.Menus.AvailableMenuItemsPanelView
		 *
		 * View class for the available menu items panel.
		 *
		 * @constructs wp.customize.Menus.AvailableMenuItemsPanelView
		 * @augments   wp.Backbone.View
		 */
		initialize: function() {
			var self = this;

if ( ! api.panel.has( 'nav_menus' ) ) {
				return;
			}

this.$search = $( '#menu-items-search' );
			this.$clearResults = this.$el.find( '.clear-results' );
			this.sectionContent = this.$el.find( '.available-menu-items-list' );

this.debounceSearch = _.debounce( self.search, 500 );

_.bindAll( this, 'close' );

/*
			 * If the available menu items panel is open and the customize controls
			 * are interacted with (other than an item being deleted), then close
			 * the available menu items panel. Also close on back button click.
			 */
			$( '#customize-controls, .customize-section-back' ).on( 'click keydown', function( e ) {
				var isDeleteBtn = $( e.target ).is( '.item-delete, .item-delete *' ),
					isAddNewBtn = $( e.target ).is( '.add-new-menu-item, .add-new-menu-item *' );
				if ( $( 'body' ).hasClass( 'adding-menu-items' ) && ! isDeleteBtn && ! isAddNewBtn ) {
					self.close();
				}
			} );

// Clear the search results and trigger an `input` event to fire a new search.
			this.$clearResults.on( 'click', function() {
				self.$search.val( '' ).focus().trigger( 'input' );
			} );

this.$el.on( 'input', '#custom-menu-item-name.invalid, #custom-menu-item-url.invalid', function() {
				$( this ).removeClass( 'invalid' );
			});

// Load available items if it looks like we'll need them.
			api.panel( 'nav_menus' ).container.bind( 'expanded', function() {
				if ( ! self.rendered ) {
					self.initList();
					self.rendered = true;
				}
			});

// Load more items.
			this.sectionContent.scroll( function() {
				var totalHeight = self.$el.find( '.accordion-section.open .available-menu-items-list' ).prop( 'scrollHeight' ),
					visibleHeight = self.$el.find( '.accordion-section.open' ).height();

if ( ! self.loading && $( this ).scrollTop() > 3 / 4 * totalHeight - visibleHeight ) {
					var type = $( this ).data( 'type' ),
						object = $( this ).data( 'object' );

if ( 'search' === type ) {
						if ( self.searchTerm ) {
							self.doSearch( self.pages.search );
						}
					} else {
						self.loadItems( [
							{ type: type, object: object }
						] );
					}
				}
			});

// Close the panel if the URL in the preview changes.
			api.previewer.bind( 'url', this.close );

self.delegateEvents();
		},

// Search input change handler.
		search: function( event ) {
			var $searchSection = $( '#available-menu-items-search' ),
				$otherSections = $( '#available-menu-items .accordion-section' ).not( $searchSection );

if ( ! event ) {
				return;
			}

if ( this.searchTerm === event.target.value ) {
				return;
			}

if ( '' !== event.target.value && ! $searchSection.hasClass( 'open' ) ) {
				$otherSections.fadeOut( 100 );
				$searchSection.find( '.accordion-section-content' ).slideDown( 'fast' );
				$searchSection.addClass( 'open' );
				this.$clearResults.addClass( 'is-visible' );
			} else if ( '' === event.target.value ) {
				$searchSection.removeClass( 'open' );
				$otherSections.show();
				this.$clearResults.removeClass( 'is-visible' );
			}

this.searchTerm = event.target.value;
			this.pages.search = 1;
			this.doSearch( 1 );
		},

// Get search results.
		doSearch: function( page ) {
			var self = this, params,
				$section = $( '#available-menu-items-search' ),
				$content = $section.find( '.accordion-section-content' ),
				itemTemplate = wp.template( 'available-menu-item' );

if ( self.currentRequest ) {
				self.currentRequest.abort();
			}

if ( page < 0 ) {
				return;
			} else if ( page > 1 ) {
				$section.addClass( 'loading-more' );
				$content.attr( 'aria-busy', 'true' );
				wp.a11y.speak( api.Menus.data.l10n.itemsLoadingMore );
			} else if ( '' === self.searchTerm ) {
				$content.html( '' );
				wp.a11y.speak( '' );
				return;
			}

$section.addClass( 'loading' );
			self.loading = true;

params = api.previewer.query( { excludeCustomizedSaved: true } );
			_.extend( params, {
				'customize-menus-nonce': api.settings.nonce['customize-menus'],
				'wp_customize': 'on',
				'search': self.searchTerm,
				'page': page
			} );

self.currentRequest = wp.ajax.post( 'search-available-menu-items-customizer', params );

self.currentRequest.done(function( data ) {
				var items;
				if ( 1 === page ) {
					// Clear previous results as it's a new search.
					$content.empty();
				}
				$section.removeClass( 'loading loading-more' );
				$content.attr( 'aria-busy', 'false' );
				$section.addClass( 'open' );
				self.loading = false;
				items = new api.Menus.AvailableItemCollection( data.items );
				self.collection.add( items.models );
				items.each( function( menuItem ) {
					$content.append( itemTemplate( menuItem.attributes ) );
				} );
				if ( 20 > items.length ) {
					self.pages.search = -1; // Up to 20 posts and 20 terms in results, if <20, no more results for either.
				} else {
					self.pages.search = self.pages.search + 1;
				}
				if ( items && page > 1 ) {
					wp.a11y.speak( api.Menus.data.l10n.itemsFoundMore.replace( '%d', items.length ) );
				} else if ( items && page === 1 ) {
					wp.a11y.speak( api.Menus.data.l10n.itemsFound.replace( '%d', items.length ) );
				}
			});

self.currentRequest.fail(function( data ) {
				// data.message may be undefined, for example when typing slow and the request is aborted.
				if ( data.message ) {
					$content.empty().append( $( '<li class="nothing-found"></li>' ).text( data.message ) );
					wp.a11y.speak( data.message );
				}
				self.pages.search = -1;
			});

self.currentRequest.always(function() {
				$section.removeClass( 'loading loading-more' );
				$content.attr( 'aria-busy', 'false' );
				self.loading = false;
				self.currentRequest = null;
			});
		},

// Render the individual items.
		initList: function() {
			var self = this;

// Render the template for each item by type.
			_.each( api.Menus.data.itemTypes, function( itemType ) {
				self.pages[ itemType.type + ':' + itemType.object ] = 0;
			} );
			self.loadItems( api.Menus.data.itemTypes );
		},

/**
		 * Load available nav menu items.
		 *
		 * @since 4.3.0
		 * @since 4.7.0 Changed function signature to take list of item types instead of single type/object.
		 * @access private
		 *
		 * @param {Array.<Object>} itemTypes List of objects containing type and key.
		 * @param {string} deprecated Formerly the object parameter.
		 * @return {void}
		 */
		loadItems: function( itemTypes, deprecated ) {
			var self = this, _itemTypes, requestItemTypes = [], params, request, itemTemplate, availableMenuItemContainers = {};
			itemTemplate = wp.template( 'available-menu-item' );

if ( _.isString( itemTypes ) && _.isString( deprecated ) ) {
				_itemTypes = [ { type: itemTypes, object: deprecated } ];
			} else {
				_itemTypes = itemTypes;
			}

_.each( _itemTypes, function( itemType ) {
				var container, name = itemType.type + ':' + itemType.object;
				if ( -1 === self.pages[ name ] ) {
					return; // Skip types for which there are no more results.
				}
				container = $( '#available-menu-items-' + itemType.type + '-' + itemType.object );
				container.find( '.accordion-section-title' ).addClass( 'loading' );
				availableMenuItemContainers[ name ] = container;

requestItemTypes.push( {
					object: itemType.object,
					type: itemType.type,
					page: self.pages[ name ]
				} );
			} );

if ( 0 === requestItemTypes.length ) {
				return;
			}

self.loading = true;

request = wp.ajax.post( 'load-available-menu-items-customizer', params );

request.done(function( data ) {
				var typeInner;
				_.each( data.items, function( typeItems, name ) {
					if ( 0 === typeItems.length ) {
						if ( 0 === self.pages[ name ] ) {
							availableMenuItemContainers[ name ].find( '.accordion-section-title' )
								.addClass( 'cannot-expand' )
								.removeClass( 'loading' )
								.find( '.accordion-section-title > button' )
								.prop( 'tabIndex', -1 );
						}
						self.pages[ name ] = -1;
						return;
					} else if ( ( 'post_type:page' === name ) && ( ! availableMenuItemContainers[ name ].hasClass( 'open' ) ) ) {
						availableMenuItemContainers[ name ].find( '.accordion-section-title > button' ).click();
					}
					typeItems = new api.Menus.AvailableItemCollection( typeItems ); // @todo Why is this collection created and then thrown away?
					self.collection.add( typeItems.models );
					typeInner = availableMenuItemContainers[ name ].find( '.available-menu-items-list' );
					typeItems.each( function( menuItem ) {
						typeInner.append( itemTemplate( menuItem.attributes ) );
					} );
					self.pages[ name ] += 1;
				});
			});
			request.fail(function( data ) {
				if ( typeof console !== 'undefined' && console.error ) {
					console.error( data );
				}
			});
			request.always(function() {
				_.each( availableMenuItemContainers, function( container ) {
					container.find( '.accordion-section-title' ).removeClass( 'loading' );
				} );
				self.loading = false;
			});
		},

// Adjust the height of each section of items to fit the screen.
		itemSectionHeight: function() {
			var sections, lists, totalHeight, accordionHeight, diff;
			totalHeight = window.innerHeight;
			sections = this.$el.find( '.accordion-section:not( #available-menu-items-search ) .accordion-section-content' );
			lists = this.$el.find( '.accordion-section:not( #available-menu-items-search ) .available-menu-items-list:not(":only-child")' );
			accordionHeight =  46 * ( 1 + sections.length ) + 14; // Magic numbers.
			diff = totalHeight - accordionHeight;
			if ( 120 < diff && 290 > diff ) {
				sections.css( 'max-height', diff );
				lists.css( 'max-height', ( diff - 60 ) );
			}
		},

// Highlights a menu item.
		select: function( menuitemTpl ) {
			this.selected = $( menuitemTpl );
			this.selected.siblings( '.menu-item-tpl' ).removeClass( 'selected' );
			this.selected.addClass( 'selected' );
		},

// Highlights a menu item on focus.
		focus: function( event ) {
			this.select( $( event.currentTarget ) );
		},

// Submit handler for keypress and click on menu item.
		_submit: function( event ) {
			// Only proceed with keypress if it is Enter or Spacebar.
			if ( 'keypress' === event.type && ( 13 !== event.which && 32 !== event.which ) ) {
				return;
			}

this.submit( $( event.currentTarget ) );
		},

// Adds a selected menu item to the menu.
		submit: function( menuitemTpl ) {
			var menuitemId, menu_item;

if ( ! menuitemTpl ) {
				menuitemTpl = this.selected;
			}

if ( ! menuitemTpl || ! this.currentMenuControl ) {
				return;
			}

this.select( menuitemTpl );

menuitemId = $( this.selected ).data( 'menu-item-id' );
			menu_item = this.collection.findWhere( { id: menuitemId } );
			if ( ! menu_item ) {
				return;
			}

this.currentMenuControl.addItemToMenu( menu_item.attributes );

$( menuitemTpl ).find( '.menu-item-handle' ).addClass( 'item-added' );
		},

// Submit handler for keypress and click on custom menu item.
		_submitLink: function( event ) {
			// Only proceed with keypress if it is Enter.
			if ( 'keypress' === event.type && 13 !== event.which ) {
				return;
			}

this.submitLink();
		},

// Adds the custom menu item to the menu.
		submitLink: function() {
			var menuItem,
				itemName = $( '#custom-menu-item-name' ),
				itemUrl = $( '#custom-menu-item-url' ),
				url = itemUrl.val().trim(),
				urlRegex;

if ( ! this.currentMenuControl ) {
				return;
			}

/*
			 * Allow URLs including:
			 * - http://example.com/
			 * - //example.com
			 * - /directory/
			 * - ?query-param
			 * - #target
			 * - mailto:foo@example.com
			 *
			 * Any further validation will be handled on the server when the setting is attempted to be saved,
			 * so this pattern does not need to be complete.
			 */
			urlRegex = /^((\w+:)?\/\/\w.*|\w+:(?!\/\/$)|\/|\?|#)/;

if ( '' === itemName.val() ) {
				itemName.addClass( 'invalid' );
				return;
			} else if ( ! urlRegex.test( url ) ) {
				itemUrl.addClass( 'invalid' );
				return;
			}

menuItem = {
				'title': itemName.val(),
				'url': url,
				'type': 'custom',
				'type_label': api.Menus.data.l10n.custom_label,
				'object': 'custom'
			};

this.currentMenuControl.addItemToMenu( menuItem );

// Reset the custom link form.
			itemUrl.val( '' ).attr( 'placeholder', 'https://' );
			itemName.val( '' );
		},

/**
		 * Submit handler for keypress (enter) on field and click on button.
		 *
		 * @since 4.7.0
		 * @private
		 *
		 * @param {jQuery.Event} event Event.
		 * @return {void}
		 */
		_submitNew: function( event ) {
			var container;

// Only proceed with keypress if it is Enter.
			if ( 'keypress' === event.type && 13 !== event.which ) {
				return;
			}

if ( this.addingNew ) {
				return;
			}

container = $( event.target ).closest( '.accordion-section' );

this.submitNew( container );
		},

/**
		 * Creates a new object and adds an associated menu item to the menu.
		 *
		 * @since 4.7.0
		 * @private
		 *
		 * @param {jQuery} container
		 * @return {void}
		 */
		submitNew: function( container ) {
			var panel = this,
				itemName = container.find( '.create-item-input' ),
				title = itemName.val(),
				dataContainer = container.find( '.available-menu-items-list' ),
				itemType = dataContainer.data( 'type' ),
				itemObject = dataContainer.data( 'object' ),
				itemTypeLabel = dataContainer.data( 'type_label' ),
				promise;

if ( ! this.currentMenuControl ) {
				return;
			}

// Only posts are supported currently.
			if ( 'post_type' !== itemType ) {
				return;
			}

if ( '' === $.trim( itemName.val() ) ) {
				itemName.addClass( 'invalid' );
				itemName.focus();
				return;
			} else {
				itemName.removeClass( 'invalid' );
				container.find( '.accordion-section-title' ).addClass( 'loading' );
			}

panel.addingNew = true;
			itemName.attr( 'disabled', 'disabled' );
			promise = api.Menus.insertAutoDraftPost( {
				post_title: title,
				post_type: itemObject
			} );
			promise.done( function( data ) {
				var availableItem, $content, itemElement;
				availableItem = new api.Menus.AvailableItemModel( {
					'id': 'post-' + data.post_id, // Used for available menu item Backbone models.
					'title': itemName.val(),
					'type': itemType,
					'type_label': itemTypeLabel,
					'object': itemObject,
					'object_id': data.post_id,
					'url': data.url
				} );

// Add new item to menu.
				panel.currentMenuControl.addItemToMenu( availableItem.attributes );

// Add the new item to the list of available items.
				api.Menus.availableMenuItemsPanel.collection.add( availableItem );
				$content = container.find( '.available-menu-items-list' );
				itemElement = $( wp.template( 'available-menu-item' )( availableItem.attributes ) );
				itemElement.find( '.menu-item-handle:first' ).addClass( 'item-added' );
				$content.prepend( itemElement );
				$content.scrollTop();

// Reset the create content form.
				itemName.val( '' ).removeAttr( 'disabled' );
				panel.addingNew = false;
				container.find( '.accordion-section-title' ).removeClass( 'loading' );
			} );
		},

// Opens the panel.
		open: function( menuControl ) {
			var panel = this, close;

this.currentMenuControl = menuControl;

this.itemSectionHeight();

if ( api.section.has( 'publish_settings' ) ) {
				api.section( 'publish_settings' ).collapse();
			}

$( 'body' ).addClass( 'adding-menu-items' );

close = function() {
				panel.close();
				$( this ).off( 'click', close );
			};
			$( '#customize-preview' ).on( 'click', close );

// Collapse all controls.
			_( this.currentMenuControl.getMenuItemControls() ).each( function( control ) {
				control.collapseForm();
			} );

this.$el.find( '.selected' ).removeClass( 'selected' );

this.$search.focus();
		},

// Closes the panel.
		close: function( options ) {
			options = options || {};

if ( options.returnFocus && this.currentMenuControl ) {
				this.currentMenuControl.container.find( '.add-new-menu-item' ).focus();
			}

this.currentMenuControl = null;
			this.selected = null;

$( 'body' ).removeClass( 'adding-menu-items' );
			$( '#available-menu-items .menu-item-handle.item-added' ).removeClass( 'item-added' );

this.$search.val( '' ).trigger( 'input' );
		},

// Add a few keyboard enhancements to the panel.
		keyboardAccessible: function( event ) {
			var isEnter = ( 13 === event.which ),
				isEsc = ( 27 === event.which ),
				isBackTab = ( 9 === event.which && event.shiftKey ),
				isSearchFocused = $( event.target ).is( this.$search );

// If enter pressed but nothing entered, don't do anything.
			if ( isEnter && ! this.$search.val() ) {
				return;
			}

if ( isSearchFocused && isBackTab ) {
				this.currentMenuControl.container.find( '.add-new-menu-item' ).focus();
				event.preventDefault(); // Avoid additional back-tab.
			} else if ( isEsc ) {
				this.close( { returnFocus: true } );
			}
		}
	});

/**
	 * wp.customize.Menus.MenusPanel
	 *
	 * Customizer panel for menus. This is used only for screen options management.
	 * Note that 'menus' must match the WP_Customize_Menu_Panel::$type.
	 *
	 * @class    wp.customize.Menus.MenusPanel
	 * @augments wp.customize.Panel
	 */
	api.Menus.MenusPanel = api.Panel.extend(/** @lends wp.customize.Menus.MenusPanel.prototype */{

attachEvents: function() {
			api.Panel.prototype.attachEvents.call( this );

var panel = this,
				panelMeta = panel.container.find( '.panel-meta' ),
				help = panelMeta.find( '.customize-help-toggle' ),
				content = panelMeta.find( '.customize-panel-description' ),
				options = $( '#screen-options-wrap' ),
				button = panelMeta.find( '.customize-screen-options-toggle' );
			button.on( 'click keydown', function( event ) {
				if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
					return;
				}
				event.preventDefault();

// Hide description.
				if ( content.not( ':hidden' ) ) {
					content.slideUp( 'fast' );
					help.attr( 'aria-expanded', 'false' );
				}

if ( 'true' === button.attr( 'aria-expanded' ) ) {
					button.attr( 'aria-expanded', 'false' );
					panelMeta.removeClass( 'open' );
					panelMeta.removeClass( 'active-menu-screen-options' );
					options.slideUp( 'fast' );
				} else {
					button.attr( 'aria-expanded', 'true' );
					panelMeta.addClass( 'open' );
					panelMeta.addClass( 'active-menu-screen-options' );
					options.slideDown( 'fast' );
				}

return false;
			} );

// Help toggle.
			help.on( 'click keydown', function( event ) {
				if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
					return;
				}
				event.preventDefault();

if ( 'true' === button.attr( 'aria-expanded' ) ) {
					button.attr( 'aria-expanded', 'false' );
					help.attr( 'aria-expanded', 'true' );
					panelMeta.addClass( 'open' );
					panelMeta.removeClass( 'active-menu-screen-options' );
					options.slideUp( 'fast' );
					content.slideDown( 'fast' );
				}
			} );
		},

/**
		 * Update field visibility when clicking on the field toggles.
		 */
		ready: function() {
			var panel = this;
			panel.container.find( '.hide-column-tog' ).click( function() {
				panel.saveManageColumnsState();
			});

// Inject additional heading into the menu locations section's head container.
			api.section( 'menu_locations', function( section ) {
				section.headContainer.prepend(
					wp.template( 'nav-menu-locations-header' )( api.Menus.data )
				);
			} );
		},

/**
		 * Save hidden column states.
		 *
		 * @since 4.3.0
		 * @private
		 *
		 * @return {void}
		 */
		saveManageColumnsState: _.debounce( function() {
			var panel = this;
			if ( panel._updateHiddenColumnsRequest ) {
				panel._updateHiddenColumnsRequest.abort();
			}

panel._updateHiddenColumnsRequest = wp.ajax.post( 'hidden-columns', {
				hidden: panel.hidden(),
				screenoptionnonce: $( '#screenoptionnonce' ).val(),
				page: 'nav-menus'
			} );
			panel._updateHiddenColumnsRequest.always( function() {
				panel._updateHiddenColumnsRequest = null;
			} );
		}, 2000 ),

/**
		 * @deprecated Since 4.7.0 now that the nav_menu sections are responsible for toggling the classes on their own containers.
		 */
		checked: function() {},

/**
		 * @deprecated Since 4.7.0 now that the nav_menu sections are responsible for toggling the classes on their own containers.
		 */
		unchecked: function() {},

/**
		 * Get hidden fields.
		 *
		 * @since 4.3.0
		 * @private
		 *
		 * @return {Array} Fields (columns) that are hidden.
		 */
		hidden: function() {
			return $( '.hide-column-tog' ).not( ':checked' ).map( function() {
				var id = this.id;
				return id.substring( 0, id.length - 5 );
			}).get().join( ',' );
		}
	} );

/**
	 * wp.customize.Menus.MenuSection
	 *
	 * Customizer section for menus. This is used only for lazy-loading child controls.
	 * Note that 'nav_menu' must match the WP_Customize_Menu_Section::$type.
	 *
	 * @class    wp.customize.Menus.MenuSection
	 * @augments wp.customize.Section
	 */
	api.Menus.MenuSection = api.Section.extend(/** @lends wp.customize.Menus.MenuSection.prototype */{

/**
		 * Initialize.
		 *
		 * @since 4.3.0
		 *
		 * @param {string} id
		 * @param {Object} options
		 */
		initialize: function( id, options ) {
			var section = this;
			api.Section.prototype.initialize.call( section, id, options );
			section.deferred.initSortables = $.Deferred();
		},

/**
		 * Ready.
		 */
		ready: function() {
			var section = this, fieldActiveToggles, handleFieldActiveToggle;

if ( 'undefined' === typeof section.params.menu_id ) {
				throw new Error( 'params.menu_id was not defined' );
			}

/*
			 * Since newly created sections won't be registered in PHP, we need to prevent the
			 * preview's sending of the activeSections to result in this control
			 * being deactivated when the preview refreshes. So we can hook onto
			 * the setting that has the same ID and its presence can dictate
			 * whether the section is active.
			 */
			section.active.validate = function() {
				if ( ! api.has( section.id ) ) {
					return false;
				}
				return !! api( section.id ).get();
			};

section.populateControls();

section.navMenuLocationSettings = {};
			section.assignedLocations = new api.Value( [] );

api.each(function( setting, id ) {
				var matches = id.match( /^nav_menu_locations\[(.+?)]/ );
				if ( matches ) {
					section.navMenuLocationSettings[ matches[1] ] = setting;
					setting.bind( function() {
						section.refreshAssignedLocations();
					});
				}
			});

section.assignedLocations.bind(function( to ) {
				section.updateAssignedLocationsInSectionTitle( to );
			});

section.refreshAssignedLocations();

api.bind( 'pane-contents-reflowed', function() {
				// Skip menus that have been removed.
				if ( ! section.contentContainer.parent().length ) {
					return;
				}
				section.container.find( '.menu-item .menu-item-reorder-nav button' ).attr({ 'tabindex': '0', 'aria-hidden': 'false' });
				section.container.find( '.menu-item.move-up-disabled .menus-move-up' ).attr({ 'tabindex': '-1', 'aria-hidden': 'true' });
				section.container.find( '.menu-item.move-down-disabled .menus-move-down' ).attr({ 'tabindex': '-1', 'aria-hidden': 'true' });
				section.container.find( '.menu-item.move-left-disabled .menus-move-left' ).attr({ 'tabindex': '-1', 'aria-hidden': 'true' });
				section.container.find( '.menu-item.move-right-disabled .menus-move-right' ).attr({ 'tabindex': '-1', 'aria-hidden': 'true' });
			} );

/**
			 * Update the active field class for the content container for a given checkbox toggle.
			 *
			 * @this {jQuery}
			 * @return {void}
			 */
			handleFieldActiveToggle = function() {
				var className = 'field-' + $( this ).val() + '-active';
				section.contentContainer.toggleClass( className, $( this ).prop( 'checked' ) );
			};
			fieldActiveToggles = api.panel( 'nav_menus' ).contentContainer.find( '.metabox-prefs:first' ).find( '.hide-column-tog' );
			fieldActiveToggles.each( handleFieldActiveToggle );
			fieldActiveToggles.on( 'click', handleFieldActiveToggle );
		},

populateControls: function() {
			var section = this,
				menuNameControlId,
				menuLocationsControlId,
				menuAutoAddControlId,
				menuDeleteControlId,
				menuControl,
				menuNameControl,
				menuLocationsControl,
				menuAutoAddControl,
				menuDeleteControl;

// Add the control for managing the menu name.
			menuNameControlId = section.id + '[name]';
			menuNameControl = api.control( menuNameControlId );
			if ( ! menuNameControl ) {
				menuNameControl = new api.controlConstructor.nav_menu_name( menuNameControlId, {
					type: 'nav_menu_name',
					label: api.Menus.data.l10n.menuNameLabel,
					section: section.id,
					priority: 0,
					settings: {
						'default': section.id
					}
				} );
				api.control.add( menuNameControl );
				menuNameControl.active.set( true );
			}

// Add the menu control.
			menuControl = api.control( section.id );
			if ( ! menuControl ) {
				menuControl = new api.controlConstructor.nav_menu( section.id, {
					type: 'nav_menu',
					section: section.id,
					priority: 998,
					settings: {
						'default': section.id
					},
					menu_id: section.params.menu_id
				} );
				api.control.add( menuControl );
				menuControl.active.set( true );
			}

// Add the menu locations control.
			menuLocationsControlId = section.id + '[locations]';
			menuLocationsControl = api.control( menuLocationsControlId );
			if ( ! menuLocationsControl ) {
				menuLocationsControl = new api.controlConstructor.nav_menu_locations( menuLocationsControlId, {
					section: section.id,
					priority: 999,
					settings: {
						'default': section.id
					},
					menu_id: section.params.menu_id
				} );
				api.control.add( menuLocationsControl.id, menuLocationsControl );
				menuControl.active.set( true );
			}

// Add the control for managing the menu auto_add.
			menuAutoAddControlId = section.id + '[auto_add]';
			menuAutoAddControl = api.control( menuAutoAddControlId );
			if ( ! menuAutoAddControl ) {
				menuAutoAddControl = new api.controlConstructor.nav_menu_auto_add( menuAutoAddControlId, {
					type: 'nav_menu_auto_add',
					label: '',
					section: section.id,
					priority: 1000,
					settings: {
						'default': section.id
					}
				} );
				api.control.add( menuAutoAddControl );
				menuAutoAddControl.active.set( true );
			}

// Add the control for deleting the menu.
			menuDeleteControlId = section.id + '[delete]';
			menuDeleteControl = api.control( menuDeleteControlId );
			if ( ! menuDeleteControl ) {
				menuDeleteControl = new api.Control( menuDeleteControlId, {
					section: section.id,
					priority: 1001,
					templateId: 'nav-menu-delete-button'
				} );
				api.control.add( menuDeleteControl.id, menuDeleteControl );
				menuDeleteControl.active.set( true );
				menuDeleteControl.deferred.embedded.done( function () {
					menuDeleteControl.container.find( 'button' ).on( 'click', function() {
						var menuId = section.params.menu_id;
						var menuControl = api.Menus.getMenuControl( menuId );
						menuControl.setting.set( false );
					});
				} );
			}
		},

/**
		 *
		 */
		refreshAssignedLocations: function() {
			var section = this,
				menuTermId = section.params.menu_id,
				currentAssignedLocations = [];
			_.each( section.navMenuLocationSettings, function( setting, themeLocation ) {
				if ( setting() === menuTermId ) {
					currentAssignedLocations.push( themeLocation );
				}
			});
			section.assignedLocations.set( currentAssignedLocations );
		},

/**
		 * @param {Array} themeLocationSlugs Theme location slugs.
		 */
		updateAssignedLocationsInSectionTitle: function( themeLocationSlugs ) {
			var section = this,
				$title;

$title = section.container.find( '.accordion-section-title:first' );
			$title.find( '.menu-in-location' ).remove();
			_.each( themeLocationSlugs, function( themeLocationSlug ) {
				var $label, locationName;
				$label = $( '<span class="menu-in-location"></span>' );
				locationName = api.Menus.data.locationSlugMappedToName[ themeLocationSlug ];
				$label.text( api.Menus.data.l10n.menuLocation.replace( '%s', locationName ) );
				$title.append( $label );
			});

section.container.toggleClass( 'assigned-to-menu-location', 0 !== themeLocationSlugs.length );

onChangeExpanded: function( expanded, args ) {
			var section = this, completeCallback;

if ( expanded ) {
				wpNavMenu.menuList = section.contentContainer;
				wpNavMenu.targetList = wpNavMenu.menuList;

// Add attributes needed by wpNavMenu.
				$( '#menu-to-edit' ).removeAttr( 'id' );
				wpNavMenu.menuList.attr( 'id', 'menu-to-edit' ).addClass( 'menu' );

_.each( api.section( section.id ).controls(), function( control ) {
					if ( 'nav_menu_item' === control.params.type ) {
						control.actuallyEmbed();
					}
				} );

// Make sure Sortables is initialized after the section has been expanded to prevent `offset` issues.
				if ( args.completeCallback ) {
					completeCallback = args.completeCallback;
				}
				args.completeCallback = function() {
					if ( 'resolved' !== section.deferred.initSortables.state() ) {
						wpNavMenu.initSortables(); // Depends on menu-to-edit ID being set above.
						section.deferred.initSortables.resolve( wpNavMenu.menuList ); // Now MenuControl can extend the sortable.

// @todo Note that wp.customize.reflowPaneContents() is debounced,
						// so this immediate change will show a slight flicker while priorities get updated.
						api.control( 'nav_menu[' + String( section.params.menu_id ) + ']' ).reflowMenuItems();
					}
					if ( _.isFunction( completeCallback ) ) {
						completeCallback();
					}
				};
			}
			api.Section.prototype.onChangeExpanded.call( section, expanded, args );
		},

/**
		 * Highlight how a user may create new menu items.
		 *
		 * This method reminds the user to create new menu items and how.
		 * It's exposed this way because this class knows best which UI needs
		 * highlighted but those expanding this section know more about why and
		 * when the affordance should be highlighted.
		 *
		 * @since 4.9.0
		 *
		 * @return {void}
		 */
		highlightNewItemButton: function() {
			api.utils.highlightButton( this.contentContainer.find( '.add-new-menu-item' ), { delay: 2000 } );
		}
	});

/**
	 * Create a nav menu setting and section.
	 *
	 * @since 4.9.0
	 *
	 * @param {string} [name=''] Nav menu name.
	 * @return {wp.customize.Menus.MenuSection} Added nav menu.
	 */
	api.Menus.createNavMenu = function createNavMenu( name ) {
		var customizeId, placeholderId, setting;
		placeholderId = api.Menus.generatePlaceholderAutoIncrementId();

customizeId = 'nav_menu[' + String( placeholderId ) + ']';

// Register the menu control setting.
		setting = api.create( customizeId, customizeId, {}, {
			type: 'nav_menu',
			transport: api.Menus.data.settingTransport,
			previewer: api.previewer
		} );
		setting.set( $.extend(
			{},
			api.Menus.data.defaultSettingValues.nav_menu,
			{
				name: name || ''
			}
		) );

/*
		 * Add the menu section (and its controls).
		 * Note that this will automatically create the required controls
		 * inside via the Section's ready method.
		 */
		return api.section.add( new api.Menus.MenuSection( customizeId, {
			panel: 'nav_menus',
			title: displayNavMenuName( name ),
			customizeAction: api.Menus.data.l10n.customizingMenus,
			priority: 10,
			menu_id: placeholderId
		} ) );
	};

/**
	 * wp.customize.Menus.NewMenuSection
	 *
	 * Customizer section for new menus.
	 *
	 * @class    wp.customize.Menus.NewMenuSection
	 * @augments wp.customize.Section
	 */
	api.Menus.NewMenuSection = api.Section.extend(/** @lends wp.customize.Menus.NewMenuSection.prototype */{

/**
		 * Add behaviors for the accordion section.
		 *
		 * @since 4.3.0
		 */
		attachEvents: function() {
			var section = this,
				container = section.container,
				contentContainer = section.contentContainer,
				navMenuSettingPattern = /^nav_menu\[/;

section.headContainer.find( '.accordion-section-title' ).replaceWith(
				wp.template( 'nav-menu-create-menu-section-title' )
			);

/*
			 * We have to manually handle section expanded because we do not
			 * apply the `accordion-section-title` class to this button-driven section.
			 */
			container.on( 'click', '.customize-add-menu-button', function() {
				section.expand();
			});

contentContainer.on( 'keydown', '.menu-name-field', function( event ) {
				if ( 13 === event.which ) { // Enter.
					section.submit();
				}
			} );
			contentContainer.on( 'click', '#customize-new-menu-submit', function( event ) {
				section.submit();
				event.stopPropagation();
				event.preventDefault();
			} );

/**
			 * Get number of non-deleted nav menus.
			 *
			 * @since 4.9.0
			 * @return {number} Count.
			 */
			function getNavMenuCount() {
				var count = 0;
				api.each( function( setting ) {
					if ( navMenuSettingPattern.test( setting.id ) && false !== setting.get() ) {
						count += 1;
					}
				} );
				return count;
			}

/**
			 * Update visibility of notice to prompt users to create menus.
			 *
			 * @since 4.9.0
			 * @return {void}
			 */
			function updateNoticeVisibility() {
				container.find( '.add-new-menu-notice' ).prop( 'hidden', getNavMenuCount() > 0 );
			}

/**
			 * Handle setting addition.
			 *
			 * @since 4.9.0
			 * @param {wp.customize.Setting} setting - Added setting.
			 * @return {void}
			 */
			function addChangeEventListener( setting ) {
				if ( navMenuSettingPattern.test( setting.id ) ) {
					setting.bind( updateNoticeVisibility );
					updateNoticeVisibility();
				}
			}

/**
			 * Handle setting removal.
			 *
			 * @since 4.9.0
			 * @param {wp.customize.Setting} setting - Removed setting.
			 * @return {void}
			 */
			function removeChangeEventListener( setting ) {
				if ( navMenuSettingPattern.test( setting.id ) ) {
					setting.unbind( updateNoticeVisibility );
					updateNoticeVisibility();
				}
			}

api.each( addChangeEventListener );
			api.bind( 'add', addChangeEventListener );
			api.bind( 'removed', removeChangeEventListener );
			updateNoticeVisibility();

api.Section.prototype.attachEvents.apply( section, arguments );
		},

/**
		 * Set up the control.
		 *
		 * @since 4.9.0
		 */
		ready: function() {
			this.populateControls();
		},

/**
		 * Create the controls for this section.
		 *
		 * @since 4.9.0
		 */
		populateControls: function() {
			var section = this,
				menuNameControlId,
				menuLocationsControlId,
				newMenuSubmitControlId,
				menuNameControl,
				menuLocationsControl,
				newMenuSubmitControl;

menuNameControlId = section.id + '[name]';
			menuNameControl = api.control( menuNameControlId );
			if ( ! menuNameControl ) {
				menuNameControl = new api.controlConstructor.nav_menu_name( menuNameControlId, {
					label: api.Menus.data.l10n.menuNameLabel,
					description: api.Menus.data.l10n.newMenuNameDescription,
					section: section.id,
					priority: 0
				} );
				api.control.add( menuNameControl.id, menuNameControl );
				menuNameControl.active.set( true );
			}

menuLocationsControlId = section.id + '[locations]';
			menuLocationsControl = api.control( menuLocationsControlId );
			if ( ! menuLocationsControl ) {
				menuLocationsControl = new api.controlConstructor.nav_menu_locations( menuLocationsControlId, {
					section: section.id,
					priority: 1,
					menu_id: '',
					isCreating: true
				} );
				api.control.add( menuLocationsControlId, menuLocationsControl );
				menuLocationsControl.active.set( true );
			}

newMenuSubmitControlId = section.id + '[submit]';
			newMenuSubmitControl = api.control( newMenuSubmitControlId );
			if ( !newMenuSubmitControl ) {
				newMenuSubmitControl = new api.Control( newMenuSubmitControlId, {
					section: section.id,
					priority: 1,
					templateId: 'nav-menu-submit-new-button'
				} );
				api.control.add( newMenuSubmitControlId, newMenuSubmitControl );
				newMenuSubmitControl.active.set( true );
			}
		},

/**
		 * Create the new menu with name and location supplied by the user.
		 *
		 * @since 4.9.0
		 */
		submit: function() {
			var section = this,
				contentContainer = section.contentContainer,
				nameInput = contentContainer.find( '.menu-name-field' ).first(),
				name = nameInput.val(),
				menuSection;

if ( ! name ) {
				nameInput.addClass( 'invalid' );
				nameInput.focus();
				return;
			}

menuSection = api.Menus.createNavMenu( name );

// Clear name field.
			nameInput.val( '' );
			nameInput.removeClass( 'invalid' );

contentContainer.find( '.assigned-menu-location input[type=checkbox]' ).each( function() {
				var checkbox = $( this ),
				navMenuLocationSetting;

if ( checkbox.prop( 'checked' ) ) {
					navMenuLocationSetting = api( 'nav_menu_locations[' + checkbox.data( 'location-id' ) + ']' );
					navMenuLocationSetting.set( menuSection.params.menu_id );

// Reset state for next new menu.
					checkbox.prop( 'checked', false );
				}
			} );

wp.a11y.speak( api.Menus.data.l10n.menuAdded );

// Focus on the new menu section.
			menuSection.focus( {
				completeCallback: function() {
					menuSection.highlightNewItemButton();
				}
			} );
		},

/**
		 * Select a default location.
		 *
		 * This method selects a single location by default so we can support
		 * creating a menu for a specific menu location.
		 *
		 * @since 4.9.0
		 *
		 * @param {string|null} locationId - The ID of the location to select. `null` clears all selections.
		 * @return {void}
		 */
		selectDefaultLocation: function( locationId ) {
			var locationControl = api.control( this.id + '[locations]' ),
				locationSelections = {};

if ( locationId !== null ) {
				locationSelections[ locationId ] = true;
			}

locationControl.setSelections( locationSelections );
		}
	});

/**
	 * wp.customize.Menus.MenuLocationControl
	 *
	 * Customizer control for menu locations (rendered as a <select>).
	 * Note that 'nav_menu_location' must match the WP_Customize_Nav_Menu_Location_Control::$type.
	 *
	 * @class    wp.customize.Menus.MenuLocationControl
	 * @augments wp.customize.Control
	 */
	api.Menus.MenuLocationControl = api.Control.extend(/** @lends wp.customize.Menus.MenuLocationControl.prototype */{
		initialize: function( id, options ) {
			var control = this,
				matches = id.match( /^nav_menu_locations\[(.+?)]/ );
			control.themeLocation = matches[1];
			api.Control.prototype.initialize.call( control, id, options );
		},

ready: function() {
			var control = this, navMenuIdRegex = /^nav_menu\[(-?\d+)]/;

// @todo It would be better if this was added directly on the setting itself, as opposed to the control.
			control.setting.validate = function( value ) {
				if ( '' === value ) {
					return 0;
				} else {
					return parseInt( value, 10 );
				}
			};

// Create and Edit menu buttons.
			control.container.find( '.create-menu' ).on( 'click', function() {
				var addMenuSection = api.section( 'add_menu' );
				addMenuSection.selectDefaultLocation( this.dataset.locationId );
				addMenuSection.focus();
			} );
			control.container.find( '.edit-menu' ).on( 'click', function() {
				var menuId = control.setting();
				api.section( 'nav_menu[' + menuId + ']' ).focus();
			});
			control.setting.bind( 'change', function() {
				var menuIsSelected = 0 !== control.setting();
				control.container.find( '.create-menu' ).toggleClass( 'hidden', menuIsSelected );
				control.container.find( '.edit-menu' ).toggleClass( 'hidden', ! menuIsSelected );
			});

// Add/remove menus from the available options when they are added and removed.
			api.bind( 'add', function( setting ) {
				var option, menuId, matches = setting.id.match( navMenuIdRegex );
				if ( ! matches || false === setting() ) {
					return;
				}
				menuId = matches[1];
				option = new Option( displayNavMenuName( setting().name ), menuId );
				control.container.find( 'select' ).append( option );
			});
			api.bind( 'remove', function( setting ) {
				var menuId, matches = setting.id.match( navMenuIdRegex );
				if ( ! matches ) {
					return;
				}
				menuId = parseInt( matches[1], 10 );
				if ( control.setting() === menuId ) {
					control.setting.set( '' );
				}
				control.container.find( 'option[value=' + menuId + ']' ).remove();
			});
			api.bind( 'change', function( setting ) {
				var menuId, matches = setting.id.match( navMenuIdRegex );
				if ( ! matches ) {
					return;
				}
				menuId = parseInt( matches[1], 10 );
				if ( false === setting() ) {
					if ( control.setting() === menuId ) {
						control.setting.set( '' );
					}
					control.container.find( 'option[value=' + menuId + ']' ).remove();
				} else {
					control.container.find( 'option[value=' + menuId + ']' ).text( displayNavMenuName( setting().name ) );
				}
			});
		}
	});

api.Menus.MenuItemControl = api.Control.extend(/** @lends wp.customize.Menus.MenuItemControl.prototype */{

/**
		 * wp.customize.Menus.MenuItemControl
		 *
		 * Customizer control for menu items.
		 * Note that 'menu_item' must match the WP_Customize_Menu_Item_Control::$type.
		 *
		 * @constructs wp.customize.Menus.MenuItemControl
		 * @augments   wp.customize.Control
		 *
		 * @inheritDoc
		 */
		initialize: function( id, options ) {
			var control = this;
			control.expanded = new api.Value( false );
			control.expandedArgumentsQueue = [];
			control.expanded.bind( function( expanded ) {
				var args = control.expandedArgumentsQueue.shift();
				args = $.extend( {}, control.defaultExpandedArguments, args );
				control.onChangeExpanded( expanded, args );
			});
			api.Control.prototype.initialize.call( control, id, options );
			control.active.validate = function() {
				var value, section = api.section( control.section() );
				if ( section ) {
					value = section.active();
				} else {
					value = false;
				}
				return value;
			};
		},

/**
		 * Override the embed() method to do nothing,
		 * so that the control isn't embedded on load,
		 * unless the containing section is already expanded.
		 *
		 * @since 4.3.0
		 */
		embed: function() {
			var control = this,
				sectionId = control.section(),
				section;
			if ( ! sectionId ) {
				return;
			}
			section = api.section( sectionId );
			if ( ( section && section.expanded() ) || api.settings.autofocus.control === control.id ) {
				control.actuallyEmbed();
			}
		},

/**
		 * This function is called in Section.onChangeExpanded() so the control
		 * will only get embedded when the Section is first expanded.
		 *
		 * @since 4.3.0
		 */
		actuallyEmbed: function() {
			var control = this;
			if ( 'resolved' === control.deferred.embedded.state() ) {
				return;
			}
			control.renderContent();
			control.deferred.embedded.resolve(); // This triggers control.ready().
		},

/**
		 * Set up the control.
		 */
		ready: function() {
			if ( 'undefined' === typeof this.params.menu_item_id ) {
				throw new Error( 'params.menu_item_id was not defined' );
			}

this._setupControlToggle();
			this._setupReorderUI();
			this._setupUpdateUI();
			this._setupRemoveUI();
			this._setupLinksUI();
			this._setupTitleUI();
		},

/**
		 * Show/hide the settings when clicking on the menu item handle.
		 */
		_setupControlToggle: function() {
			var control = this;

this.container.find( '.menu-item-handle' ).on( 'click', function( e ) {
				e.preventDefault();
				e.stopPropagation();
				var menuControl = control.getMenuControl(),
					isDeleteBtn = $( e.target ).is( '.item-delete, .item-delete *' ),
					isAddNewBtn = $( e.target ).is( '.add-new-menu-item, .add-new-menu-item *' );

if ( $( 'body' ).hasClass( 'adding-menu-items' ) && ! isDeleteBtn && ! isAddNewBtn ) {
					api.Menus.availableMenuItemsPanel.close();
				}

if ( menuControl.isReordering || menuControl.isSorting ) {
					return;
				}
				control.toggleForm();
			} );
		},

/**
		 * Set up the menu-item-reorder-nav
		 */
		_setupReorderUI: function() {
			var control = this, template, $reorderNav;

template = wp.template( 'menu-item-reorder-nav' );

// Add the menu item reordering elements to the menu item control.
			control.container.find( '.item-controls' ).after( template );

// Handle clicks for up/down/left-right on the reorder nav.
			$reorderNav = control.container.find( '.menu-item-reorder-nav' );
			$reorderNav.find( '.menus-move-up, .menus-move-down, .menus-move-left, .menus-move-right' ).on( 'click', function() {
				var moveBtn = $( this );
				moveBtn.focus();

var isMoveUp = moveBtn.is( '.menus-move-up' ),
					isMoveDown = moveBtn.is( '.menus-move-down' ),
					isMoveLeft = moveBtn.is( '.menus-move-left' ),
					isMoveRight = moveBtn.is( '.menus-move-right' );

if ( isMoveUp ) {
					control.moveUp();
				} else if ( isMoveDown ) {
					control.moveDown();
				} else if ( isMoveLeft ) {
					control.moveLeft();
				} else if ( isMoveRight ) {
					control.moveRight();
				}

moveBtn.focus(); // Re-focus after the container was moved.
			} );
		},

/**
		 * Set up event handlers for menu item updating.
		 */
		_setupUpdateUI: function() {
			var control = this,
				settingValue = control.setting(),
				updateNotifications;

control.elements = {};
			control.elements.url = new api.Element( control.container.find( '.edit-menu-item-url' ) );
			control.elements.title = new api.Element( control.container.find( '.edit-menu-item-title' ) );
			control.elements.attr_title = new api.Element( control.container.find( '.edit-menu-item-attr-title' ) );
			control.elements.target = new api.Element( control.container.find( '.edit-menu-item-target' ) );
			control.elements.classes = new api.Element( control.container.find( '.edit-menu-item-classes' ) );
			control.elements.xfn = new api.Element( control.container.find( '.edit-menu-item-xfn' ) );
			control.elements.description = new api.Element( control.container.find( '.edit-menu-item-description' ) );
			// @todo Allow other elements, added by plugins, to be automatically picked up here;
			// allow additional values to be added to setting array.

_.each( control.elements, function( element, property ) {
				element.bind(function( value ) {
					if ( element.element.is( 'input[type=checkbox]' ) ) {
						value = ( value ) ? element.element.val() : '';
					}

control.setting.bind(function( to, from ) {
				var itemId = control.params.menu_item_id,
					followingSiblingItemControls = [],
					childrenItemControls = [],
					menuControl;

if ( false === to ) {
					menuControl = api.control( 'nav_menu[' + String( from.nav_menu_term_id ) + ']' );
					control.container.remove();

_.each( menuControl.getMenuItemControls(), function( otherControl ) {
						if ( from.menu_item_parent === otherControl.setting().menu_item_parent && otherControl.setting().position > from.position ) {
							followingSiblingItemControls.push( otherControl );
						} else if ( otherControl.setting().menu_item_parent === itemId ) {
							childrenItemControls.push( otherControl );
						}
					});

// Shift all following siblings by the number of children this item has.
					_.each( followingSiblingItemControls, function( followingSiblingItemControl ) {
						var value = _.clone( followingSiblingItemControl.setting() );
						value.position += childrenItemControls.length;
						followingSiblingItemControl.setting.set( value );
					});

// Now move the children up to be the new subsequent siblings.
					_.each( childrenItemControls, function( childrenItemControl, i ) {
						var value = _.clone( childrenItemControl.setting() );
						value.position = from.position + i;
						value.menu_item_parent = from.menu_item_parent;
						childrenItemControl.setting.set( value );
					});

menuControl.debouncedReflowMenuItems();
				} else {
					// Update the elements' values to match the new setting properties.
					_.each( to, function( value, key ) {
						if ( control.elements[ key] ) {
							control.elements[ key ].set( to[ key ] );
						}
					} );
					control.container.find( '.menu-item-data-parent-id' ).val( to.menu_item_parent );

// Handle UI updates when the position or depth (parent) change.
					if ( to.position !== from.position || to.menu_item_parent !== from.menu_item_parent ) {
						control.getMenuControl().debouncedReflowMenuItems();
					}
				}
			});

// Style the URL field as invalid when there is an invalid_url notification.
			updateNotifications = function() {
				control.elements.url.element.toggleClass( 'invalid', control.setting.notifications.has( 'invalid_url' ) );
			};
			control.setting.notifications.bind( 'add', updateNotifications );
			control.setting.notifications.bind( 'removed', updateNotifications );
		},

/**
		 * Set up event handlers for menu item deletion.
		 */
		_setupRemoveUI: function() {
			var control = this, $removeBtn;

// Configure delete button.
			$removeBtn = control.container.find( '.item-delete' );

$removeBtn.on( 'click', function() {
				// Find an adjacent element to add focus to when this menu item goes away.
				var addingItems = true, $adjacentFocusTarget, $next, $prev,
					instanceCounter = 0, // Instance count of the menu item deleted.
					deleteItemOriginalItemId = control.params.original_item_id,
					addedItems = control.getMenuControl().$sectionContent.find( '.menu-item' ),
					availableMenuItem;

if ( ! $( 'body' ).hasClass( 'adding-menu-items' ) ) {
					addingItems = false;
				}

$next = control.container.nextAll( '.customize-control-nav_menu_item:visible' ).first();
				$prev = control.container.prevAll( '.customize-control-nav_menu_item:visible' ).first();

if ( $next.length ) {
					$adjacentFocusTarget = $next.find( false === addingItems ? '.item-edit' : '.item-delete' ).first();
				} else if ( $prev.length ) {
					$adjacentFocusTarget = $prev.find( false === addingItems ? '.item-edit' : '.item-delete' ).first();
				} else {
					$adjacentFocusTarget = control.container.nextAll( '.customize-control-nav_menu' ).find( '.add-new-menu-item' ).first();
				}

/*
				 * If the menu item deleted is the only of its instance left,
				 * remove the check icon of this menu item in the right panel.
				 */
				_.each( addedItems, function( addedItem ) {
					var menuItemId, menuItemControl, matches;

// This is because menu item that's deleted is just hidden.
					if ( ! $( addedItem ).is( ':visible' ) ) {
						return;
					}

matches = addedItem.getAttribute( 'id' ).match( /^customize-control-nav_menu_item-(-?\d+)$/, '' );
					if ( ! matches ) {
						return;
					}

menuItemId      = parseInt( matches[1], 10 );
					menuItemControl = api.control( 'nav_menu_item[' + String( menuItemId ) + ']' );

// Check for duplicate menu items.
					if ( menuItemControl && deleteItemOriginalItemId == menuItemControl.params.original_item_id ) {
						instanceCounter++;
					}
				} );

if ( instanceCounter <= 1 ) {
					// Revert the check icon to add icon.
					availableMenuItem = $( '#menu-item-tpl-' + control.params.original_item_id );
					availableMenuItem.removeClass( 'selected' );
					availableMenuItem.find( '.menu-item-handle' ).removeClass( 'item-added' );
				}

control.container.slideUp( function() {
					control.setting.set( false );
					wp.a11y.speak( api.Menus.data.l10n.itemDeleted );
					$adjacentFocusTarget.focus(); // Keyboard accessibility.
				} );

control.setting.set( false );
			} );
		},

_setupLinksUI: function() {
			var $origBtn;

// Configure original link.
			$origBtn = this.container.find( 'a.original-link' );

$origBtn.on( 'click', function( e ) {
				e.preventDefault();
				api.previewer.previewUrl( e.target.toString() );
			} );
		},

/**
		 * Update item handle title when changed.
		 */
		_setupTitleUI: function() {
			var control = this, titleEl;

// Ensure that whitespace is trimmed on blur so placeholder can be shown.
			control.container.find( '.edit-menu-item-title' ).on( 'blur', function() {
				$( this ).val( $.trim( $( this ).val() ) );
			} );

titleEl = control.container.find( '.menu-item-title' );
			control.setting.bind( function( item ) {
				var trimmedTitle, titleText;
				if ( ! item ) {
					return;
				}
				trimmedTitle = $.trim( item.title );

titleText = trimmedTitle || item.original_title || api.Menus.data.l10n.untitled;

if ( item._invalid ) {
					titleText = api.Menus.data.l10n.invalidTitleTpl.replace( '%s', titleText );
				}

// Don't update to an empty title.
				if ( trimmedTitle || item.original_title ) {
					titleEl
						.text( titleText )
						.removeClass( 'no-title' );
				} else {
					titleEl
						.text( titleText )
						.addClass( 'no-title' );
				}
			} );
		},

/**
		 *
		 * @return {number}
		 */
		getDepth: function() {
			var control = this, setting = control.setting(), depth = 0;
			if ( ! setting ) {
				return 0;
			}
			while ( setting && setting.menu_item_parent ) {
				depth += 1;
				control = api.control( 'nav_menu_item[' + setting.menu_item_parent + ']' );
				if ( ! control ) {
					break;
				}
				setting = control.setting();
			}
			return depth;
		},

/**
		 * Amend the control's params with the data necessary for the JS template just in time.
		 */
		renderContent: function() {
			var control = this,
				settingValue = control.setting(),
				containerClasses;

control.params.title = settingValue.title || '';
			control.params.depth = control.getDepth();
			control.container.data( 'item-depth', control.params.depth );
			containerClasses = [
				'menu-item',
				'menu-item-depth-' + String( control.params.depth ),
				'menu-item-' + settingValue.object,
				'menu-item-edit-inactive'
			];

if ( settingValue._invalid ) {
				containerClasses.push( 'menu-item-invalid' );
				control.params.title = api.Menus.data.l10n.invalidTitleTpl.replace( '%s', control.params.title );
			} else if ( 'draft' === settingValue.status ) {
				containerClasses.push( 'pending' );
				control.params.title = api.Menus.data.pendingTitleTpl.replace( '%s', control.params.title );
			}

control.params.el_classes = containerClasses.join( ' ' );
			control.params.item_type_label = settingValue.type_label;
			control.params.item_type = settingValue.type;
			control.params.url = settingValue.url;
			control.params.target = settingValue.target;
			control.params.attr_title = settingValue.attr_title;
			control.params.classes = _.isArray( settingValue.classes ) ? settingValue.classes.join( ' ' ) : settingValue.classes;
			control.params.xfn = settingValue.xfn;
			control.params.description = settingValue.description;
			control.params.parent = settingValue.menu_item_parent;
			control.params.original_title = settingValue.original_title || '';

control.container.addClass( control.params.el_classes );

api.Control.prototype.renderContent.call( control );
		},

/***********************************************************************
		 * Begin public API methods
		 **********************************************************************/

/**
		 * @return {wp.customize.controlConstructor.nav_menu|null}
		 */
		getMenuControl: function() {
			var control = this, settingValue = control.setting();
			if ( settingValue && settingValue.nav_menu_term_id ) {
				return api.control( 'nav_menu[' + settingValue.nav_menu_term_id + ']' );
			} else {
				return null;
			}
		},

/**
		 * Expand the accordion section containing a control
		 */
		expandControlSection: function() {
			var $section = this.container.closest( '.accordion-section' );
			if ( ! $section.hasClass( 'open' ) ) {
				$section.find( '.accordion-section-title:first' ).trigger( 'click' );
			}
		},

/**
		 * @since 4.6.0
		 *
		 * @param {Boolean} expanded
		 * @param {Object} [params]
		 * @return {Boolean} False if state already applied.
		 */
		_toggleExpanded: api.Section.prototype._toggleExpanded,

/**
		 * @since 4.6.0
		 *
		 * @param {Object} [params]
		 * @return {Boolean} False if already expanded.
		 */
		expand: api.Section.prototype.expand,

/**
		 * Expand the menu item form control.
		 *
		 * @since 4.5.0 Added params.completeCallback.
		 *
		 * @param {Object}   [params] - Optional params.
		 * @param {Function} [params.completeCallback] - Function to call when the form toggle has finished animating.
		 */
		expandForm: function( params ) {
			this.expand( params );
		},

/**
		 * @since 4.6.0
		 *
		 * @param {Object} [params]
		 * @return {Boolean} False if already collapsed.
		 */
		collapse: api.Section.prototype.collapse,

/**
		 * Collapse the menu item form control.
		 *
		 * @since 4.5.0 Added params.completeCallback.
		 *
		 * @param {Object}   [params] - Optional params.
		 * @param {Function} [params.completeCallback] - Function to call when the form toggle has finished animating.
		 */
		collapseForm: function( params ) {
			this.collapse( params );
		},

/**
		 * Expand or collapse the menu item control.
		 *
		 * @deprecated this is poor naming, and it is better to directly set control.expanded( showOrHide )
		 * @since 4.5.0 Added params.completeCallback.
		 *
		 * @param {boolean}  [showOrHide] - If not supplied, will be inverse of current visibility
		 * @param {Object}   [params] - Optional params.
		 * @param {Function} [params.completeCallback] - Function to call when the form toggle has finished animating.
		 */
		toggleForm: function( showOrHide, params ) {
			if ( typeof showOrHide === 'undefined' ) {
				showOrHide = ! this.expanded();
			}
			if ( showOrHide ) {
				this.expand( params );
			} else {
				this.collapse( params );
			}
		},

/**
		 * Expand or collapse the menu item control.
		 *
		 * @since 4.6.0
		 * @param {boolean}  [showOrHide] - If not supplied, will be inverse of current visibility
		 * @param {Object}   [params] - Optional params.
		 * @param {Function} [params.completeCallback] - Function to call when the form toggle has finished animating.
		 */
		onChangeExpanded: function( showOrHide, params ) {
			var self = this, $menuitem, $inside, complete;

$menuitem = this.container;
			$inside = $menuitem.find( '.menu-item-settings:first' );
			if ( 'undefined' === typeof showOrHide ) {
				showOrHide = ! $inside.is( ':visible' );
			}

// Already expanded or collapsed.
			if ( $inside.is( ':visible' ) === showOrHide ) {
				if ( params && params.completeCallback ) {
					params.completeCallback();
				}
				return;
			}

if ( showOrHide ) {
				// Close all other menu item controls before expanding this one.
				api.control.each( function( otherControl ) {
					if ( self.params.type === otherControl.params.type && self !== otherControl ) {
						otherControl.collapseForm();
					}
				} );

complete = function() {
					$menuitem
						.removeClass( 'menu-item-edit-inactive' )
						.addClass( 'menu-item-edit-active' );
					self.container.trigger( 'expanded' );

if ( params && params.completeCallback ) {
						params.completeCallback();
					}
				};

$menuitem.find( '.item-edit' ).attr( 'aria-expanded', 'true' );
				$inside.slideDown( 'fast', complete );

self.container.trigger( 'expand' );
			} else {
				complete = function() {
					$menuitem
						.addClass( 'menu-item-edit-inactive' )
						.removeClass( 'menu-item-edit-active' );
					self.container.trigger( 'collapsed' );

if ( params && params.completeCallback ) {
						params.completeCallback();
					}
				};

self.container.trigger( 'collapse' );

$menuitem.find( '.item-edit' ).attr( 'aria-expanded', 'false' );
				$inside.slideUp( 'fast', complete );
			}
		},

/**
		 * Expand the containing menu section, expand the form, and focus on
		 * the first input in the control.
		 *
		 * @since 4.5.0 Added params.completeCallback.
		 *
		 * @param {Object}   [params] - Params object.
		 * @param {Function} [params.completeCallback] - Optional callback function when focus has completed.
		 */
		focus: function( params ) {
			params = params || {};
			var control = this, originalCompleteCallback = params.completeCallback, focusControl;

focusControl = function() {
				control.expandControlSection();

params.completeCallback = function() {
					var focusable;

// Note that we can't use :focusable due to a jQuery UI issue. See: https://github.com/jquery/jquery-ui/pull/1583
					focusable = control.container.find( '.menu-item-settings' ).find( 'input, select, textarea, button, object, a[href], [tabindex]' ).filter( ':visible' );
					focusable.first().focus();

if ( originalCompleteCallback ) {
						originalCompleteCallback();
					}
				};

control.expandForm( params );
			};

if ( api.section.has( control.section() ) ) {
				api.section( control.section() ).expand( {
					completeCallback: focusControl
				} );
			} else {
				focusControl();
			}
		},

/**
		 * Move menu item up one in the menu.
		 */
		moveUp: function() {
			this._changePosition( -1 );
			wp.a11y.speak( api.Menus.data.l10n.movedUp );
		},

/**
		 * Move menu item up one in the menu.
		 */
		moveDown: function() {
			this._changePosition( 1 );
			wp.a11y.speak( api.Menus.data.l10n.movedDown );
		},
		/**
		 * Move menu item and all children up one level of depth.
		 */
		moveLeft: function() {
			this._changeDepth( -1 );
			wp.a11y.speak( api.Menus.data.l10n.movedLeft );
		},

/**
		 * Move menu item and children one level deeper, as a submenu of the previous item.
		 */
		moveRight: function() {
			this._changeDepth( 1 );
			wp.a11y.speak( api.Menus.data.l10n.movedRight );
		},

/**
		 * Note that this will trigger a UI update, causing child items to
		 * move as well and cardinal order class names to be updated.
		 *
		 * @private
		 *
		 * @param {number} offset 1|-1
		 */
		_changePosition: function( offset ) {
			var control = this,
				adjacentSetting,
				settingValue = _.clone( control.setting() ),
				siblingSettings = [],
				realPosition;

if ( 1 !== offset && -1 !== offset ) {
				throw new Error( 'Offset changes by 1 are only supported.' );
			}

// Skip moving deleted items.
			if ( ! control.setting() ) {
				return;
			}

// Locate the other items under the same parent (siblings).
			_( control.getMenuControl().getMenuItemControls() ).each(function( otherControl ) {
				if ( otherControl.setting().menu_item_parent === settingValue.menu_item_parent ) {
					siblingSettings.push( otherControl.setting );
				}
			});
			siblingSettings.sort(function( a, b ) {
				return a().position - b().position;
			});

realPosition = _.indexOf( siblingSettings, control.setting );
			if ( -1 === realPosition ) {
				throw new Error( 'Expected setting to be among siblings.' );
			}

// Skip doing anything if the item is already at the edge in the desired direction.
			if ( ( realPosition === 0 && offset < 0 ) || ( realPosition === siblingSettings.length - 1 && offset > 0 ) ) {
				// @todo Should we allow a menu item to be moved up to break it out of a parent? Adopt with previous or following parent?
				return;
			}

// Update any adjacent menu item setting to take on this item's position.
			adjacentSetting = siblingSettings[ realPosition + offset ];
			if ( adjacentSetting ) {
				adjacentSetting.set( $.extend(
					_.clone( adjacentSetting() ),
					{
						position: settingValue.position
					}
				) );
			}

settingValue.position += offset;
			control.setting.set( settingValue );
		},

/**
		 * Note that this will trigger a UI update, causing child items to
		 * move as well and cardinal order class names to be updated.
		 *
		 * @private
		 *
		 * @param {number} offset 1|-1
		 */
		_changeDepth: function( offset ) {
			if ( 1 !== offset && -1 !== offset ) {
				throw new Error( 'Offset changes by 1 are only supported.' );
			}
			var control = this,
				settingValue = _.clone( control.setting() ),
				siblingControls = [],
				realPosition,
				siblingControl,
				parentControl;

// Locate the other items under the same parent (siblings).
			_( control.getMenuControl().getMenuItemControls() ).each(function( otherControl ) {
				if ( otherControl.setting().menu_item_parent === settingValue.menu_item_parent ) {
					siblingControls.push( otherControl );
				}
			});
			siblingControls.sort(function( a, b ) {
				return a.setting().position - b.setting().position;
			});

realPosition = _.indexOf( siblingControls, control );
			if ( -1 === realPosition ) {
				throw new Error( 'Expected control to be among siblings.' );
			}

if ( -1 === offset ) {
				// Skip moving left an item that is already at the top level.
				if ( ! settingValue.menu_item_parent ) {
					return;
				}

parentControl = api.control( 'nav_menu_item[' + settingValue.menu_item_parent + ']' );

// Make this control the parent of all the following siblings.
				_( siblingControls ).chain().slice( realPosition ).each(function( siblingControl, i ) {
					siblingControl.setting.set(
						$.extend(
							{},
							siblingControl.setting(),
							{
								menu_item_parent: control.params.menu_item_id,
								position: i
							}
						)
					);
				});

// Increase the positions of the parent item's subsequent children to make room for this one.
				_( control.getMenuControl().getMenuItemControls() ).each(function( otherControl ) {
					var otherControlSettingValue, isControlToBeShifted;
					isControlToBeShifted = (
						otherControl.setting().menu_item_parent === parentControl.setting().menu_item_parent &&
						otherControl.setting().position > parentControl.setting().position
					);
					if ( isControlToBeShifted ) {
						otherControlSettingValue = _.clone( otherControl.setting() );
						otherControl.setting.set(
							$.extend(
								otherControlSettingValue,
								{ position: otherControlSettingValue.position + 1 }
							)
						);
					}
				});

// Make this control the following sibling of its parent item.
				settingValue.position = parentControl.setting().position + 1;
				settingValue.menu_item_parent = parentControl.setting().menu_item_parent;
				control.setting.set( settingValue );

} else if ( 1 === offset ) {
				// Skip moving right an item that doesn't have a previous sibling.
				if ( realPosition === 0 ) {
					return;
				}

// Make the control the last child of the previous sibling.
				siblingControl = siblingControls[ realPosition - 1 ];
				settingValue.menu_item_parent = siblingControl.params.menu_item_id;
				settingValue.position = 0;
				_( control.getMenuControl().getMenuItemControls() ).each(function( otherControl ) {
					if ( otherControl.setting().menu_item_parent === settingValue.menu_item_parent ) {
						settingValue.position = Math.max( settingValue.position, otherControl.setting().position );
					}
				});
				settingValue.position += 1;
				control.setting.set( settingValue );
			}
		}
	} );

/**
	 * wp.customize.Menus.MenuNameControl
	 *
	 * Customizer control for a nav menu's name.
	 *
	 * @class    wp.customize.Menus.MenuNameControl
	 * @augments wp.customize.Control
	 */
	api.Menus.MenuNameControl = api.Control.extend(/** @lends wp.customize.Menus.MenuNameControl.prototype */{

ready: function() {
			var control = this;

if ( control.setting ) {
				var settingValue = control.setting();

control.nameElement = new api.Element( control.container.find( '.menu-name-field' ) );

control.nameElement.bind(function( value ) {
					var settingValue = control.setting();
					if ( settingValue && settingValue.name !== value ) {
						settingValue = _.clone( settingValue );
						settingValue.name = value;
						control.setting.set( settingValue );
					}
				});
				if ( settingValue ) {
					control.nameElement.set( settingValue.name );
				}

control.setting.bind(function( object ) {
					if ( object ) {
						control.nameElement.set( object.name );
					}
				});
			}
		}
	});

/**
	 * wp.customize.Menus.MenuLocationsControl
	 *
	 * Customizer control for a nav menu's locations.
	 *
	 * @since 4.9.0
	 * @class    wp.customize.Menus.MenuLocationsControl
	 * @augments wp.customize.Control
	 */
	api.Menus.MenuLocationsControl = api.Control.extend(/** @lends wp.customize.Menus.MenuLocationsControl.prototype */{

/**
		 * Set up the control.
		 *
		 * @since 4.9.0
		 */
		ready: function () {
			var control = this;

control.container.find( '.assigned-menu-location' ).each(function() {
				var container = $( this ),
					checkbox = container.find( 'input[type=checkbox]' ),
					element = new api.Element( checkbox ),
					navMenuLocationSetting = api( 'nav_menu_locations[' + checkbox.data( 'location-id' ) + ']' ),
					isNewMenu = control.params.menu_id === '',
					updateCheckbox = isNewMenu ? _.noop : function( checked ) {
						element.set( checked );
					},
					updateSetting = isNewMenu ? _.noop : function( checked ) {
						navMenuLocationSetting.set( checked ? control.params.menu_id : 0 );
					},
					updateSelectedMenuLabel = function( selectedMenuId ) {
						var menuSetting = api( 'nav_menu[' + String( selectedMenuId ) + ']' );
						if ( ! selectedMenuId || ! menuSetting || ! menuSetting() ) {
							container.find( '.theme-location-set' ).hide();
						} else {
							container.find( '.theme-location-set' ).show().find( 'span' ).text( displayNavMenuName( menuSetting().name ) );
						}
					};

updateCheckbox( navMenuLocationSetting.get() === control.params.menu_id );

checkbox.on( 'change', function() {
					// Note: We can't use element.bind( function( checked ){ ... } ) here because it will trigger a change as well.
					updateSetting( this.checked );
				} );

navMenuLocationSetting.bind( function( selectedMenuId ) {
					updateCheckbox( selectedMenuId === control.params.menu_id );
					updateSelectedMenuLabel( selectedMenuId );
				} );
				updateSelectedMenuLabel( navMenuLocationSetting.get() );
			});
		},

/**
		 * Set the selected locations.
		 *
		 * This method sets the selected locations and allows us to do things like
		 * set the default location for a new menu.
		 *
		 * @since 4.9.0
		 *
		 * @param {Object.<string,boolean>} selections - A map of location selections.
		 * @return {void}
		 */
		setSelections: function( selections ) {
			this.container.find( '.menu-location' ).each( function( i, checkboxNode ) {
				var locationId = checkboxNode.dataset.locationId;
				checkboxNode.checked = locationId in selections ? selections[ locationId ] : false;
			} );
		}
	});

/**
	 * wp.customize.Menus.MenuAutoAddControl
	 *
	 * Customizer control for a nav menu's auto add.
	 *
	 * @class    wp.customize.Menus.MenuAutoAddControl
	 * @augments wp.customize.Control
	 */
	api.Menus.MenuAutoAddControl = api.Control.extend(/** @lends wp.customize.Menus.MenuAutoAddControl.prototype */{

ready: function() {
			var control = this,
				settingValue = control.setting();

/*
			 * Since the control is not registered in PHP, we need to prevent the
			 * preview's sending of the activeControls to result in this control
			 * being deactivated.
			 */
			control.active.validate = function() {
				var value, section = api.section( control.section() );
				if ( section ) {
					value = section.active();
				} else {
					value = false;
				}
				return value;
			};

control.autoAddElement = new api.Element( control.container.find( 'input[type=checkbox].auto_add' ) );

control.autoAddElement.bind(function( value ) {
				var settingValue = control.setting();
				if ( settingValue && settingValue.name !== value ) {
					settingValue = _.clone( settingValue );
					settingValue.auto_add = value;
					control.setting.set( settingValue );
				}
			});
			if ( settingValue ) {
				control.autoAddElement.set( settingValue.auto_add );
			}

control.setting.bind(function( object ) {
				if ( object ) {
					control.autoAddElement.set( object.auto_add );
				}
			});
		}

});

/**
	 * wp.customize.Menus.MenuControl
	 *
	 * Customizer control for menus.
	 * Note that 'nav_menu' must match the WP_Menu_Customize_Control::$type
	 *
	 * @class    wp.customize.Menus.MenuControl
	 * @augments wp.customize.Control
	 */
	api.Menus.MenuControl = api.Control.extend(/** @lends wp.customize.Menus.MenuControl.prototype */{
		/**
		 * Set up the control.
		 */
		ready: function() {
			var control = this,
				section = api.section( control.section() ),
				menuId = control.params.menu_id,
				menu = control.setting(),
				name,
				widgetTemplate,
				select;

if ( 'undefined' === typeof this.params.menu_id ) {
				throw new Error( 'params.menu_id was not defined' );
			}

/*
			 * Since the control is not registered in PHP, we need to prevent the
			 * preview's sending of the activeControls to result in this control
			 * being deactivated.
			 */
			control.active.validate = function() {
				var value;
				if ( section ) {
					value = section.active();
				} else {
					value = false;
				}
				return value;
			};

control.$controlSection = section.headContainer;
			control.$sectionContent = control.container.closest( '.accordion-section-content' );

this._setupModel();

api.section( control.section(), function( section ) {
				section.deferred.initSortables.done(function( menuList ) {
					control._setupSortable( menuList );
				});
			} );

this._setupAddition();
			this._setupTitle();

// Add menu to Navigation Menu widgets.
			if ( menu ) {
				name = displayNavMenuName( menu.name );

// Add the menu to the existing controls.
				api.control.each( function( widgetControl ) {
					if ( ! widgetControl.extended( api.controlConstructor.widget_form ) || 'nav_menu' !== widgetControl.params.widget_id_base ) {
						return;
					}
					widgetControl.container.find( '.nav-menu-widget-form-controls:first' ).show();
					widgetControl.container.find( '.nav-menu-widget-no-menus-message:first' ).hide();

select = widgetControl.container.find( 'select' );
					if ( 0 === select.find( 'option[value=' + String( menuId ) + ']' ).length ) {
						select.append( new Option( name, menuId ) );
					}
				} );

// Add the menu to the widget template.
				widgetTemplate = $( '#available-widgets-list .widget-tpl:has( input.id_base[ value=nav_menu ] )' );
				widgetTemplate.find( '.nav-menu-widget-form-controls:first' ).show();
				widgetTemplate.find( '.nav-menu-widget-no-menus-message:first' ).hide();
				select = widgetTemplate.find( '.widget-inside select:first' );
				if ( 0 === select.find( 'option[value=' + String( menuId ) + ']' ).length ) {
					select.append( new Option( name, menuId ) );
				}
			}

/*
			 * Wait for menu items to be added.
			 * Ideally, we'd bind to an event indicating construction is complete,
			 * but deferring appears to be the best option today.
			 */
			_.defer( function () {
				control.updateInvitationVisibility();
			} );
		},

/**
		 * Update ordering of menu item controls when the setting is updated.
		 */
		_setupModel: function() {
			var control = this,
				menuId = control.params.menu_id;

control.setting.bind( function( to ) {
				var name;
				if ( false === to ) {
					control._handleDeletion();
				} else {
					// Update names in the Navigation Menu widgets.
					name = displayNavMenuName( to.name );
					api.control.each( function( widgetControl ) {
						if ( ! widgetControl.extended( api.controlConstructor.widget_form ) || 'nav_menu' !== widgetControl.params.widget_id_base ) {
							return;
						}
						var select = widgetControl.container.find( 'select' );
						select.find( 'option[value=' + String( menuId ) + ']' ).text( name );
					});
				}
			} );
		},

/**
		 * Allow items in each menu to be re-ordered, and for the order to be previewed.
		 *
		 * Notice that the UI aspects here are handled by wpNavMenu.initSortables()
		 * which is called in MenuSection.onChangeExpanded()
		 *
		 * @param {Object} menuList - The element that has sortable().
		 */
		_setupSortable: function( menuList ) {
			var control = this;

if ( ! menuList.is( control.$sectionContent ) ) {
				throw new Error( 'Unexpected menuList.' );
			}

menuList.on( 'sortstart', function() {
				control.isSorting = true;
			});

menuList.on( 'sortstop', function() {
				setTimeout( function() { // Next tick.
					var menuItemContainerIds = control.$sectionContent.sortable( 'toArray' ),
						menuItemControls = [],
						position = 0,
						priority = 10;

control.isSorting = false;

// Reset horizontal scroll position when done dragging.
					control.$sectionContent.scrollLeft( 0 );

_.each( menuItemContainerIds, function( menuItemContainerId ) {
						var menuItemId, menuItemControl, matches;
						matches = menuItemContainerId.match( /^customize-control-nav_menu_item-(-?\d+)$/, '' );
						if ( ! matches ) {
							return;
						}
						menuItemId = parseInt( matches[1], 10 );
						menuItemControl = api.control( 'nav_menu_item[' + String( menuItemId ) + ']' );
						if ( menuItemControl ) {
							menuItemControls.push( menuItemControl );
						}
					} );

_.each( menuItemControls, function( menuItemControl ) {
						if ( false === menuItemControl.setting() ) {
							// Skip deleted items.
							return;
						}
						var setting = _.clone( menuItemControl.setting() );
						position += 1;
						priority += 1;
						setting.position = position;
						menuItemControl.priority( priority );

// Note that wpNavMenu will be setting this .menu-item-data-parent-id input's value.
						setting.menu_item_parent = parseInt( menuItemControl.container.find( '.menu-item-data-parent-id' ).val(), 10 );
						if ( ! setting.menu_item_parent ) {
							setting.menu_item_parent = 0;
						}

menuItemControl.setting.set( setting );
					});
				});

});
			control.isReordering = false;

/**
			 * Keyboard-accessible reordering.
			 */
			this.container.find( '.reorder-toggle' ).on( 'click', function() {
				control.toggleReordering( ! control.isReordering );
			} );
		},

/**
		 * Set up UI for adding a new menu item.
		 */
		_setupAddition: function() {
			var self = this;

this.container.find( '.add-new-menu-item' ).on( 'click', function( event ) {
				if ( self.$sectionContent.hasClass( 'reordering' ) ) {
					return;
				}

if ( ! $( 'body' ).hasClass( 'adding-menu-items' ) ) {
					$( this ).attr( 'aria-expanded', 'true' );
					api.Menus.availableMenuItemsPanel.open( self );
				} else {
					$( this ).attr( 'aria-expanded', 'false' );
					api.Menus.availableMenuItemsPanel.close();
					event.stopPropagation();
				}
			} );
		},

_handleDeletion: function() {
			var control = this,
				section,
				menuId = control.params.menu_id,
				removeSection,
				widgetTemplate,
				navMenuCount = 0;
			section = api.section( control.section() );
			removeSection = function() {
				section.container.remove();
				api.section.remove( section.id );
			};

if ( section && section.expanded() ) {
				section.collapse({
					completeCallback: function() {
						removeSection();
						wp.a11y.speak( api.Menus.data.l10n.menuDeleted );
						api.panel( 'nav_menus' ).focus();
					}
				});
			} else {
				removeSection();
			}

api.each(function( setting ) {
				if ( /^nav_menu\[/.test( setting.id ) && false !== setting() ) {
					navMenuCount += 1;
				}
			});

// Remove the menu from any Navigation Menu widgets.
			api.control.each(function( widgetControl ) {
				if ( ! widgetControl.extended( api.controlConstructor.widget_form ) || 'nav_menu' !== widgetControl.params.widget_id_base ) {
					return;
				}
				var select = widgetControl.container.find( 'select' );
				if ( select.val() === String( menuId ) ) {
					select.prop( 'selectedIndex', 0 ).trigger( 'change' );
				}

widgetControl.container.find( '.nav-menu-widget-form-controls:first' ).toggle( 0 !== navMenuCount );
				widgetControl.container.find( '.nav-menu-widget-no-menus-message:first' ).toggle( 0 === navMenuCount );
				widgetControl.container.find( 'option[value=' + String( menuId ) + ']' ).remove();
			});

// Remove the menu to the nav menu widget template.
			widgetTemplate = $( '#available-widgets-list .widget-tpl:has( input.id_base[ value=nav_menu ] )' );
			widgetTemplate.find( '.nav-menu-widget-form-controls:first' ).toggle( 0 !== navMenuCount );
			widgetTemplate.find( '.nav-menu-widget-no-menus-message:first' ).toggle( 0 === navMenuCount );
			widgetTemplate.find( 'option[value=' + String( menuId ) + ']' ).remove();
		},

/**
		 * Update Section Title as menu name is changed.
		 */
		_setupTitle: function() {
			var control = this;

control.setting.bind( function( menu ) {
				if ( ! menu ) {
					return;
				}

var section = api.section( control.section() ),
					menuId = control.params.menu_id,
					controlTitle = section.headContainer.find( '.accordion-section-title' ),
					sectionTitle = section.contentContainer.find( '.customize-section-title h3' ),
					location = section.headContainer.find( '.menu-in-location' ),
					action = sectionTitle.find( '.customize-action' ),
					name = displayNavMenuName( menu.name );

// Update the control title.
				controlTitle.text( name );
				if ( location.length ) {
					location.appendTo( controlTitle );
				}

// Update the section title.
				sectionTitle.text( name );
				if ( action.length ) {
					action.prependTo( sectionTitle );
				}

// Update the nav menu name in location selects.
				api.control.each( function( control ) {
					if ( /^nav_menu_locations\[/.test( control.id ) ) {
						control.container.find( 'option[value=' + menuId + ']' ).text( name );
					}
				} );

// Update the nav menu name in all location checkboxes.
				section.contentContainer.find( '.customize-control-checkbox input' ).each( function() {
					if ( $( this ).prop( 'checked' ) ) {
						$( '.current-menu-location-name-' + $( this ).data( 'location-id' ) ).text( name );
					}
				} );
			} );
		},

/***********************************************************************
		 * Begin public API methods
		 **********************************************************************/

/**
		 * Enable/disable the reordering UI
		 *
		 * @param {boolean} showOrHide to enable/disable reordering
		 */
		toggleReordering: function( showOrHide ) {
			var addNewItemBtn = this.container.find( '.add-new-menu-item' ),
				reorderBtn = this.container.find( '.reorder-toggle' ),
				itemsTitle = this.$sectionContent.find( '.item-title' );

showOrHide = Boolean( showOrHide );

if ( showOrHide === this.$sectionContent.hasClass( 'reordering' ) ) {
				return;
			}

this.isReordering = showOrHide;
			this.$sectionContent.toggleClass( 'reordering', showOrHide );
			this.$sectionContent.sortable( this.isReordering ? 'disable' : 'enable' );
			if ( this.isReordering ) {
				addNewItemBtn.attr({ 'tabindex': '-1', 'aria-hidden': 'true' });
				reorderBtn.attr( 'aria-label', api.Menus.data.l10n.reorderLabelOff );
				wp.a11y.speak( api.Menus.data.l10n.reorderModeOn );
				itemsTitle.attr( 'aria-hidden', 'false' );
			} else {
				addNewItemBtn.removeAttr( 'tabindex aria-hidden' );
				reorderBtn.attr( 'aria-label', api.Menus.data.l10n.reorderLabelOn );
				wp.a11y.speak( api.Menus.data.l10n.reorderModeOff );
				itemsTitle.attr( 'aria-hidden', 'true' );
			}

if ( showOrHide ) {
				_( this.getMenuItemControls() ).each( function( formControl ) {
					formControl.collapseForm();
				} );
			}
		},

/**
		 * @return {wp.customize.controlConstructor.nav_menu_item[]}
		 */
		getMenuItemControls: function() {
			var menuControl = this,
				menuItemControls = [],
				menuTermId = menuControl.params.menu_id;

api.control.each(function( control ) {
				if ( 'nav_menu_item' === control.params.type && control.setting() && menuTermId === control.setting().nav_menu_term_id ) {
					menuItemControls.push( control );
				}
			});

return menuItemControls;
		},

/**
		 * Make sure that each menu item control has the proper depth.
		 */
		reflowMenuItems: function() {
			var menuControl = this,
				menuItemControls = menuControl.getMenuItemControls(),
				reflowRecursively;

reflowRecursively = function( context ) {
				var currentMenuItemControls = [],
					thisParent = context.currentParent;
				_.each( context.menuItemControls, function( menuItemControl ) {
					if ( thisParent === menuItemControl.setting().menu_item_parent ) {
						currentMenuItemControls.push( menuItemControl );
						// @todo We could remove this item from menuItemControls now, for efficiency.
					}
				});
				currentMenuItemControls.sort( function( a, b ) {
					return a.setting().position - b.setting().position;
				});

_.each( currentMenuItemControls, function( menuItemControl ) {
					// Update position.
					context.currentAbsolutePosition += 1;
					menuItemControl.priority.set( context.currentAbsolutePosition ); // This will change the sort order.

// Update depth.
					if ( ! menuItemControl.container.hasClass( 'menu-item-depth-' + String( context.currentDepth ) ) ) {
						_.each( menuItemControl.container.prop( 'className' ).match( /menu-item-depth-\d+/g ), function( className ) {
							menuItemControl.container.removeClass( className );
						});
						menuItemControl.container.addClass( 'menu-item-depth-' + String( context.currentDepth ) );
					}
					menuItemControl.container.data( 'item-depth', context.currentDepth );

// Process any children items.
					context.currentDepth += 1;
					context.currentParent = menuItemControl.params.menu_item_id;
					reflowRecursively( context );
					context.currentDepth -= 1;
					context.currentParent = thisParent;
				});

// Update class names for reordering controls.
				if ( currentMenuItemControls.length ) {
					_( currentMenuItemControls ).each(function( menuItemControl ) {
						menuItemControl.container.removeClass( 'move-up-disabled move-down-disabled move-left-disabled move-right-disabled' );
						if ( 0 === context.currentDepth ) {
							menuItemControl.container.addClass( 'move-left-disabled' );
						} else if ( 10 === context.currentDepth ) {
							menuItemControl.container.addClass( 'move-right-disabled' );
						}
					});

currentMenuItemControls[0].container
						.addClass( 'move-up-disabled' )
						.addClass( 'move-right-disabled' )
						.toggleClass( 'move-down-disabled', 1 === currentMenuItemControls.length );
					currentMenuItemControls[ currentMenuItemControls.length - 1 ].container
						.addClass( 'move-down-disabled' )
						.toggleClass( 'move-up-disabled', 1 === currentMenuItemControls.length );
				}
			};

reflowRecursively( {
				menuItemControls: menuItemControls,
				currentParent: 0,
				currentDepth: 0,
				currentAbsolutePosition: 0
			} );

menuControl.updateInvitationVisibility( menuItemControls );
			menuControl.container.find( '.reorder-toggle' ).toggle( menuItemControls.length > 1 );
		},

/**
		 * Note that this function gets debounced so that when a lot of setting
		 * changes are made at once, for instance when moving a menu item that
		 * has child items, this function will only be called once all of the
		 * settings have been updated.
		 */
		debouncedReflowMenuItems: _.debounce( function() {
			this.reflowMenuItems.apply( this, arguments );
		}, 0 ),

/**
		 * Add a new item to this menu.
		 *
		 * @param {Object} item - Value for the nav_menu_item setting to be created.
		 * @return {wp.customize.Menus.controlConstructor.nav_menu_item} The newly-created nav_menu_item control instance.
		 */
		addItemToMenu: function( item ) {
			var menuControl = this, customizeId, settingArgs, setting, menuItemControl, placeholderId, position = 0, priority = 10,
				originalItemId = item.id || '';

_.each( menuControl.getMenuItemControls(), function( control ) {
				if ( false === control.setting() ) {
					return;
				}
				priority = Math.max( priority, control.priority() );
				if ( 0 === control.setting().menu_item_parent ) {
					position = Math.max( position, control.setting().position );
				}
			});
			position += 1;
			priority += 1;

item = $.extend(
				{},
				api.Menus.data.defaultSettingValues.nav_menu_item,
				item,
				{
					nav_menu_term_id: menuControl.params.menu_id,
					original_title: item.title,
					position: position
				}
			);
			delete item.id; // Only used by Backbone.

placeholderId = api.Menus.generatePlaceholderAutoIncrementId();
			customizeId = 'nav_menu_item[' + String( placeholderId ) + ']';
			settingArgs = {
				type: 'nav_menu_item',
				transport: api.Menus.data.settingTransport,
				previewer: api.previewer
			};
			setting = api.create( customizeId, customizeId, {}, settingArgs );
			setting.set( item ); // Change from initial empty object to actual item to mark as dirty.

// Add the menu item control.
			menuItemControl = new api.controlConstructor.nav_menu_item( customizeId, {
				type: 'nav_menu_item',
				section: menuControl.id,
				priority: priority,
				settings: {
					'default': customizeId
				},
				menu_item_id: placeholderId,
				original_item_id: originalItemId
			} );

api.control.add( menuItemControl );
			setting.preview();
			menuControl.debouncedReflowMenuItems();

wp.a11y.speak( api.Menus.data.l10n.itemAdded );

return menuItemControl;
		},

/**
		 * Show an invitation to add new menu items when there are no menu items.
		 *
		 * @since 4.9.0
		 *
		 * @param {wp.customize.controlConstructor.nav_menu_item[]} optionalMenuItemControls
		 */
		updateInvitationVisibility: function ( optionalMenuItemControls ) {
			var menuItemControls = optionalMenuItemControls || this.getMenuItemControls();

this.container.find( '.new-menu-item-invitation' ).toggle( menuItemControls.length === 0 );
		}
	} );

/**
	 * Extends wp.customize.controlConstructor with control constructor for
	 * menu_location, menu_item, nav_menu, and new_menu.
	 */
	$.extend( api.controlConstructor, {
		nav_menu_location: api.Menus.MenuLocationControl,
		nav_menu_item: api.Menus.MenuItemControl,
		nav_menu: api.Menus.MenuControl,
		nav_menu_name: api.Menus.MenuNameControl,
		nav_menu_locations: api.Menus.MenuLocationsControl,
		nav_menu_auto_add: api.Menus.MenuAutoAddControl
	});

/**
	 * Extends wp.customize.panelConstructor with section constructor for menus.
	 */
	$.extend( api.panelConstructor, {
		nav_menus: api.Menus.MenusPanel
	});

/**
	 * Extends wp.customize.sectionConstructor with section constructor for menu.
	 */
	$.extend( api.sectionConstructor, {
		nav_menu: api.Menus.MenuSection,
		new_menu: api.Menus.NewMenuSection
	});

/**
	 * Init Customizer for menus.
	 */
	api.bind( 'ready', function() {

// Set up the menu items panel.
		api.Menus.availableMenuItemsPanel = new api.Menus.AvailableMenuItemsPanelView({
			collection: api.Menus.availableMenuItems
		});

api.bind( 'saved', function( data ) {
			if ( data.nav_menu_updates || data.nav_menu_item_updates ) {
				api.Menus.applySavedData( data );
			}
		} );

/*
		 * Reset the list of posts created in the customizer once published.
		 * The setting is updated quietly (bypassing events being triggered)
		 * so that the customized state doesn't become immediately dirty.
		 */
		api.state( 'changesetStatus' ).bind( function( status ) {
			if ( 'publish' === status ) {
				api( 'nav_menus_created_posts' )._value = [];
			}
		} );

// Open and focus menu control.
		api.previewer.bind( 'focus-nav-menu-item-control', api.Menus.focusMenuItemControl );
	} );

/**
	 * When customize_save comes back with a success, make sure any inserted
	 * nav menus and items are properly re-added with their newly-assigned IDs.
	 *
	 * @alias wp.customize.Menus.applySavedData
	 *
	 * @param {Object} data
	 * @param {Array} data.nav_menu_updates
	 * @param {Array} data.nav_menu_item_updates
	 */
	api.Menus.applySavedData = function( data ) {

var insertedMenuIdMapping = {}, insertedMenuItemIdMapping = {};

_( data.nav_menu_updates ).each(function( update ) {
			var oldCustomizeId, newCustomizeId, customizeId, oldSetting, newSetting, setting, settingValue, oldSection, newSection, wasSaved, widgetTemplate, navMenuCount, shouldExpandNewSection;
			if ( 'inserted' === update.status ) {
				if ( ! update.previous_term_id ) {
					throw new Error( 'Expected previous_term_id' );
				}
				if ( ! update.term_id ) {
					throw new Error( 'Expected term_id' );
				}
				oldCustomizeId = 'nav_menu[' + String( update.previous_term_id ) + ']';
				if ( ! api.has( oldCustomizeId ) ) {
					throw new Error( 'Expected setting to exist: ' + oldCustomizeId );
				}
				oldSetting = api( oldCustomizeId );
				if ( ! api.section.has( oldCustomizeId ) ) {
					throw new Error( 'Expected control to exist: ' + oldCustomizeId );
				}
				oldSection = api.section( oldCustomizeId );

settingValue = oldSetting.get();
				if ( ! settingValue ) {
					throw new Error( 'Did not expect setting to be empty (deleted).' );
				}
				settingValue = $.extend( _.clone( settingValue ), update.saved_value );

insertedMenuIdMapping[ update.previous_term_id ] = update.term_id;
				newCustomizeId = 'nav_menu[' + String( update.term_id ) + ']';
				newSetting = api.create( newCustomizeId, newCustomizeId, settingValue, {
					type: 'nav_menu',
					transport: api.Menus.data.settingTransport,
					previewer: api.previewer
				} );

shouldExpandNewSection = oldSection.expanded();
				if ( shouldExpandNewSection ) {
					oldSection.collapse();
				}

// Add the menu section.
				newSection = new api.Menus.MenuSection( newCustomizeId, {
					panel: 'nav_menus',
					title: settingValue.name,
					customizeAction: api.Menus.data.l10n.customizingMenus,
					type: 'nav_menu',
					priority: oldSection.priority.get(),
					menu_id: update.term_id
				} );

// Add new control for the new menu.
				api.section.add( newSection );

// Update the values for nav menus in Navigation Menu controls.
				api.control.each( function( setting ) {
					if ( ! setting.extended( api.controlConstructor.widget_form ) || 'nav_menu' !== setting.params.widget_id_base ) {
						return;
					}
					var select, oldMenuOption, newMenuOption;
					select = setting.container.find( 'select' );
					oldMenuOption = select.find( 'option[value=' + String( update.previous_term_id ) + ']' );
					newMenuOption = select.find( 'option[value=' + String( update.term_id ) + ']' );
					newMenuOption.prop( 'selected', oldMenuOption.prop( 'selected' ) );
					oldMenuOption.remove();
				} );

// Delete the old placeholder nav_menu.
				oldSetting.callbacks.disable(); // Prevent setting triggering Customizer dirty state when set.
				oldSetting.set( false );
				oldSetting.preview();
				newSetting.preview();
				oldSetting._dirty = false;

// Remove nav_menu section.
				oldSection.container.remove();
				api.section.remove( oldCustomizeId );

// Update the nav_menu widget to reflect removed placeholder menu.
				navMenuCount = 0;
				api.each(function( setting ) {
					if ( /^nav_menu\[/.test( setting.id ) && false !== setting() ) {
						navMenuCount += 1;
					}
				});
				widgetTemplate = $( '#available-widgets-list .widget-tpl:has( input.id_base[ value=nav_menu ] )' );
				widgetTemplate.find( '.nav-menu-widget-form-controls:first' ).toggle( 0 !== navMenuCount );
				widgetTemplate.find( '.nav-menu-widget-no-menus-message:first' ).toggle( 0 === navMenuCount );
				widgetTemplate.find( 'option[value=' + String( update.previous_term_id ) + ']' ).remove();

// Update the nav_menu_locations[...] controls to remove the placeholder menus from the dropdown options.
				wp.customize.control.each(function( control ){
					if ( /^nav_menu_locations\[/.test( control.id ) ) {
						control.container.find( 'option[value=' + String( update.previous_term_id ) + ']' ).remove();
					}
				});

// Update nav_menu_locations to reference the new ID.
				api.each( function( setting ) {
					var wasSaved = api.state( 'saved' ).get();
					if ( /^nav_menu_locations\[/.test( setting.id ) && setting.get() === update.previous_term_id ) {
						setting.set( update.term_id );
						setting._dirty = false; // Not dirty because this is has also just been done on server in WP_Customize_Nav_Menu_Setting::update().
						api.state( 'saved' ).set( wasSaved );
						setting.preview();
					}
				} );

if ( shouldExpandNewSection ) {
					newSection.expand();
				}
			} else if ( 'updated' === update.status ) {
				customizeId = 'nav_menu[' + String( update.term_id ) + ']';
				if ( ! api.has( customizeId ) ) {
					throw new Error( 'Expected setting to exist: ' + customizeId );
				}

// Make sure the setting gets updated with its sanitized server value (specifically the conflict-resolved name).
				setting = api( customizeId );
				if ( ! _.isEqual( update.saved_value, setting.get() ) ) {
					wasSaved = api.state( 'saved' ).get();
					setting.set( update.saved_value );
					setting._dirty = false;
					api.state( 'saved' ).set( wasSaved );
				}
			}
		} );

// Build up mapping of nav_menu_item placeholder IDs to inserted IDs.
		_( data.nav_menu_item_updates ).each(function( update ) {
			if ( update.previous_post_id ) {
				insertedMenuItemIdMapping[ update.previous_post_id ] = update.post_id;
			}
		});

_( data.nav_menu_item_updates ).each(function( update ) {
			var oldCustomizeId, newCustomizeId, oldSetting, newSetting, settingValue, oldControl, newControl;
			if ( 'inserted' === update.status ) {
				if ( ! update.previous_post_id ) {
					throw new Error( 'Expected previous_post_id' );
				}
				if ( ! update.post_id ) {
					throw new Error( 'Expected post_id' );
				}
				oldCustomizeId = 'nav_menu_item[' + String( update.previous_post_id ) + ']';
				if ( ! api.has( oldCustomizeId ) ) {
					throw new Error( 'Expected setting to exist: ' + oldCustomizeId );
				}
				oldSetting = api( oldCustomizeId );
				if ( ! api.control.has( oldCustomizeId ) ) {
					throw new Error( 'Expected control to exist: ' + oldCustomizeId );
				}
				oldControl = api.control( oldCustomizeId );

settingValue = oldSetting.get();
				if ( ! settingValue ) {
					throw new Error( 'Did not expect setting to be empty (deleted).' );
				}
				settingValue = _.clone( settingValue );

// If the parent menu item was also inserted, update the menu_item_parent to the new ID.
				if ( settingValue.menu_item_parent < 0 ) {
					if ( ! insertedMenuItemIdMapping[ settingValue.menu_item_parent ] ) {
						throw new Error( 'inserted ID for menu_item_parent not available' );
					}
					settingValue.menu_item_parent = insertedMenuItemIdMapping[ settingValue.menu_item_parent ];
				}

// If the menu was also inserted, then make sure it uses the new menu ID for nav_menu_term_id.
				if ( insertedMenuIdMapping[ settingValue.nav_menu_term_id ] ) {
					settingValue.nav_menu_term_id = insertedMenuIdMapping[ settingValue.nav_menu_term_id ];
				}

newCustomizeId = 'nav_menu_item[' + String( update.post_id ) + ']';
				newSetting = api.create( newCustomizeId, newCustomizeId, settingValue, {
					type: 'nav_menu_item',
					transport: api.Menus.data.settingTransport,
					previewer: api.previewer
				} );

// Add the menu control.
				newControl = new api.controlConstructor.nav_menu_item( newCustomizeId, {
					type: 'nav_menu_item',
					menu_id: update.post_id,
					section: 'nav_menu[' + String( settingValue.nav_menu_term_id ) + ']',
					priority: oldControl.priority.get(),
					settings: {
						'default': newCustomizeId
					},
					menu_item_id: update.post_id
				} );

// Remove old control.
				oldControl.container.remove();
				api.control.remove( oldCustomizeId );

// Add new control to take its place.
				api.control.add( newControl );

// Delete the placeholder and preview the new setting.
				oldSetting.callbacks.disable(); // Prevent setting triggering Customizer dirty state when set.
				oldSetting.set( false );
				oldSetting.preview();
				newSetting.preview();
				oldSetting._dirty = false;

newControl.container.toggleClass( 'menu-item-edit-inactive', oldControl.container.hasClass( 'menu-item-edit-inactive' ) );
			}
		});

/*
		 * Update the settings for any nav_menu widgets that had selected a placeholder ID.
		 */
		_.each( data.widget_nav_menu_updates, function( widgetSettingValue, widgetSettingId ) {
			var setting = api( widgetSettingId );
			if ( setting ) {
				setting._value = widgetSettingValue;
				setting.preview(); // Send to the preview now so that menu refresh will use the inserted menu.
			}
		});
	};

/**
	 * Focus a menu item control.
	 *
	 * @alias wp.customize.Menus.focusMenuItemControl
	 *
	 * @param {string} menuItemId
	 */
	api.Menus.focusMenuItemControl = function( menuItemId ) {
		var control = api.Menus.getMenuItemControl( menuItemId );
		if ( control ) {
			control.focus();
		}
	};

/**
	 * Get the control for a given menu.
	 *
	 * @alias wp.customize.Menus.getMenuControl
	 *
	 * @param menuId
	 * @return {wp.customize.controlConstructor.menus[]}
	 */
	api.Menus.getMenuControl = function( menuId ) {
		return api.control( 'nav_menu[' + menuId + ']' );
	};

/**
	 * Given a menu item ID, get the control associated with it.
	 *
	 * @alias wp.customize.Menus.getMenuItemControl
	 *
	 * @param {string} menuItemId
	 * @return {Object|null}
	 */
	api.Menus.getMenuItemControl = function( menuItemId ) {
		return api.control( menuItemIdToSettingId( menuItemId ) );
	};

/**
	 * @alias wp.customize.Menus~menuItemIdToSettingId
	 *
	 * @param {string} menuItemId
	 */
	function menuItemIdToSettingId( menuItemId ) {
		return 'nav_menu_item[' + menuItemId + ']';
	}

/**
	 * Apply sanitize_text_field()-like logic to the supplied name, returning a
	 * "unnammed" fallback string if the name is then empty.
	 *
	 * @alias wp.customize.Menus~displayNavMenuName
	 *
	 * @param {string} name
	 * @return {string}
	 */
	function displayNavMenuName( name ) {
		name = name || '';
		name = wp.sanitize.stripTagsAndEncodeText( name ); // Remove any potential tags from name.
		name = $.trim( name );
		return name || api.Menus.data.l10n.unnamed;
	}

})( wp.customize, wp, jQuery );

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