Adding upstream version 6.4.3+dfsg1.upstream/6.4.3+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1575 insertions, 0 deletions

diff --git a/wp-admin/js/nav-menu.js b/wp-admin/js/nav-menu.js
new file mode 100644
index 0000000..9877f78
--- /dev/null
+++ b/wp-admin/js/nav-menu.js
@@ -0,0 +1,1575 @@
+/**
+ * WordPress Administration Navigation Menu
+ * Interface JS functions
+ *
+ * @version 2.0.0
+ *
+ * @package WordPress
+ * @subpackage Administration
+ * @output wp-admin/js/nav-menu.js
+ */
+
+/* global menus, postboxes, columns, isRtl, ajaxurl, wpNavMenu */
+
+(function($) {
+
+	var api;
+
+	/**
+	 * Contains all the functions to handle WordPress navigation menus administration.
+	 *
+	 * @namespace wpNavMenu
+	 */
+	api = window.wpNavMenu = {
+
+		options : {
+			menuItemDepthPerLevel : 30, // Do not use directly. Use depthToPx and pxToDepth instead.
+			globalMaxDepth:  11,
+			sortableItems:   '> *',
+			targetTolerance: 0
+		},
+
+		menuList : undefined,	// Set in init.
+		targetList : undefined, // Set in init.
+		menusChanged : false,
+		isRTL: !! ( 'undefined' != typeof isRtl && isRtl ),
+		negateIfRTL: ( 'undefined' != typeof isRtl && isRtl ) ? -1 : 1,
+		lastSearch: '',
+
+		// Functions that run on init.
+		init : function() {
+			api.menuList = $('#menu-to-edit');
+			api.targetList = api.menuList;
+
+			this.jQueryExtensions();
+
+			this.attachMenuEditListeners();
+
+			this.attachBulkSelectButtonListeners();
+			this.attachMenuCheckBoxListeners();
+			this.attachMenuItemDeleteButton();
+			this.attachPendingMenuItemsListForDeletion();
+
+			this.attachQuickSearchListeners();
+			this.attachThemeLocationsListeners();
+			this.attachMenuSaveSubmitListeners();
+
+			this.attachTabsPanelListeners();
+
+			this.attachUnsavedChangesListener();
+
+			if ( api.menuList.length )
+				this.initSortables();
+
+			if ( menus.oneThemeLocationNoMenus )
+				$( '#posttype-page' ).addSelectedToMenu( api.addMenuItemToBottom );
+
+			this.initManageLocations();
+
+			this.initAccessibility();
+
+			this.initToggles();
+
+			this.initPreviewing();
+		},
+
+		jQueryExtensions : function() {
+			// jQuery extensions.
+			$.fn.extend({
+				menuItemDepth : function() {
+					var margin = api.isRTL ? this.eq(0).css('margin-right') : this.eq(0).css('margin-left');
+					return api.pxToDepth( margin && -1 != margin.indexOf('px') ? margin.slice(0, -2) : 0 );
+				},
+				updateDepthClass : function(current, prev) {
+					return this.each(function(){
+						var t = $(this);
+						prev = prev || t.menuItemDepth();
+						$(this).removeClass('menu-item-depth-'+ prev )
+							.addClass('menu-item-depth-'+ current );
+					});
+				},
+				shiftDepthClass : function(change) {
+					return this.each(function(){
+						var t = $(this),
+							depth = t.menuItemDepth(),
+							newDepth = depth + change;
+
+						t.removeClass( 'menu-item-depth-'+ depth )
+							.addClass( 'menu-item-depth-'+ ( newDepth ) );
+
+						if ( 0 === newDepth ) {
+							t.find( '.is-submenu' ).hide();
+						}
+					});
+				},
+				childMenuItems : function() {
+					var result = $();
+					this.each(function(){
+						var t = $(this), depth = t.menuItemDepth(), next = t.next( '.menu-item' );
+						while( next.length && next.menuItemDepth() > depth ) {
+							result = result.add( next );
+							next = next.next( '.menu-item' );
+						}
+					});
+					return result;
+				},
+				shiftHorizontally : function( dir ) {
+					return this.each(function(){
+						var t = $(this),
+							depth = t.menuItemDepth(),
+							newDepth = depth + dir;
+
+						// Change .menu-item-depth-n class.
+						t.moveHorizontally( newDepth, depth );
+					});
+				},
+				moveHorizontally : function( newDepth, depth ) {
+					return this.each(function(){
+						var t = $(this),
+							children = t.childMenuItems(),
+							diff = newDepth - depth,
+							subItemText = t.find('.is-submenu');
+
+						// Change .menu-item-depth-n class.
+						t.updateDepthClass( newDepth, depth ).updateParentMenuItemDBId();
+
+						// If it has children, move those too.
+						if ( children ) {
+							children.each(function() {
+								var t = $(this),
+									thisDepth = t.menuItemDepth(),
+									newDepth = thisDepth + diff;
+								t.updateDepthClass(newDepth, thisDepth).updateParentMenuItemDBId();
+							});
+						}
+
+						// Show "Sub item" helper text.
+						if (0 === newDepth)
+							subItemText.hide();
+						else
+							subItemText.show();
+					});
+				},
+				updateParentMenuItemDBId : function() {
+					return this.each(function(){
+						var item = $(this),
+							input = item.find( '.menu-item-data-parent-id' ),
+							depth = parseInt( item.menuItemDepth(), 10 ),
+							parentDepth = depth - 1,
+							parent = item.prevAll( '.menu-item-depth-' + parentDepth ).first();
+
+						if ( 0 === depth ) { // Item is on the top level, has no parent.
+							input.val(0);
+						} else { // Find the parent item, and retrieve its object id.
+							input.val( parent.find( '.menu-item-data-db-id' ).val() );
+						}
+					});
+				},
+				hideAdvancedMenuItemFields : function() {
+					return this.each(function(){
+						var that = $(this);
+						$('.hide-column-tog').not(':checked').each(function(){
+							that.find('.field-' + $(this).val() ).addClass('hidden-field');
+						});
+					});
+				},
+				/**
+				 * Adds selected menu items to the menu.
+				 *
+				 * @ignore
+				 *
+				 * @param jQuery metabox The metabox jQuery object.
+				 */
+				addSelectedToMenu : function(processMethod) {
+					if ( 0 === $('#menu-to-edit').length ) {
+						return false;
+					}
+
+					return this.each(function() {
+						var t = $(this), menuItems = {},
+							checkboxes = ( menus.oneThemeLocationNoMenus && 0 === t.find( '.tabs-panel-active .categorychecklist li input:checked' ).length ) ? t.find( '#page-all li input[type="checkbox"]' ) : t.find( '.tabs-panel-active .categorychecklist li input:checked' ),
+							re = /menu-item\[([^\]]*)/;
+
+						processMethod = processMethod || api.addMenuItemToBottom;
+
+						// If no items are checked, bail.
+						if ( !checkboxes.length )
+							return false;
+
+						// Show the Ajax spinner.
+						t.find( '.button-controls .spinner' ).addClass( 'is-active' );
+
+						// Retrieve menu item data.
+						$(checkboxes).each(function(){
+							var t = $(this),
+								listItemDBIDMatch = re.exec( t.attr('name') ),
+								listItemDBID = 'undefined' == typeof listItemDBIDMatch[1] ? 0 : parseInt(listItemDBIDMatch[1], 10);
+
+							if ( this.className && -1 != this.className.indexOf('add-to-top') )
+								processMethod = api.addMenuItemToTop;
+							menuItems[listItemDBID] = t.closest('li').getItemData( 'add-menu-item', listItemDBID );
+						});
+
+						// Add the items.
+						api.addItemToMenu(menuItems, processMethod, function(){
+							// Deselect the items and hide the Ajax spinner.
+							checkboxes.prop( 'checked', false );
+							t.find( '.button-controls .select-all' ).prop( 'checked', false );
+							t.find( '.button-controls .spinner' ).removeClass( 'is-active' );
+						});
+					});
+				},
+				getItemData : function( itemType, id ) {
+					itemType = itemType || 'menu-item';
+
+					var itemData = {}, i,
+					fields = [
+						'menu-item-db-id',
+						'menu-item-object-id',
+						'menu-item-object',
+						'menu-item-parent-id',
+						'menu-item-position',
+						'menu-item-type',
+						'menu-item-title',
+						'menu-item-url',
+						'menu-item-description',
+						'menu-item-attr-title',
+						'menu-item-target',
+						'menu-item-classes',
+						'menu-item-xfn'
+					];
+
+					if( !id && itemType == 'menu-item' ) {
+						id = this.find('.menu-item-data-db-id').val();
+					}
+
+					if( !id ) return itemData;
+
+					this.find('input').each(function() {
+						var field;
+						i = fields.length;
+						while ( i-- ) {
+							if( itemType == 'menu-item' )
+								field = fields[i] + '[' + id + ']';
+							else if( itemType == 'add-menu-item' )
+								field = 'menu-item[' + id + '][' + fields[i] + ']';
+
+							if (
+								this.name &&
+								field == this.name
+							) {
+								itemData[fields[i]] = this.value;
+							}
+						}
+					});
+
+					return itemData;
+				},
+				setItemData : function( itemData, itemType, id ) { // Can take a type, such as 'menu-item', or an id.
+					itemType = itemType || 'menu-item';
+
+					if( !id && itemType == 'menu-item' ) {
+						id = $('.menu-item-data-db-id', this).val();
+					}
+
+					if( !id ) return this;
+
+					this.find('input').each(function() {
+						var t = $(this), field;
+						$.each( itemData, function( attr, val ) {
+							if( itemType == 'menu-item' )
+								field = attr + '[' + id + ']';
+							else if( itemType == 'add-menu-item' )
+								field = 'menu-item[' + id + '][' + attr + ']';
+
+							if ( field == t.attr('name') ) {
+								t.val( val );
+							}
+						});
+					});
+					return this;
+				}
+			});
+		},
+
+		countMenuItems : function( depth ) {
+			return $( '.menu-item-depth-' + depth ).length;
+		},
+
+		moveMenuItem : function( $this, dir ) {
+
+			var items, newItemPosition, newDepth,
+				menuItems = $( '#menu-to-edit li' ),
+				menuItemsCount = menuItems.length,
+				thisItem = $this.parents( 'li.menu-item' ),
+				thisItemChildren = thisItem.childMenuItems(),
+				thisItemData = thisItem.getItemData(),
+				thisItemDepth = parseInt( thisItem.menuItemDepth(), 10 ),
+				thisItemPosition = parseInt( thisItem.index(), 10 ),
+				nextItem = thisItem.next(),
+				nextItemChildren = nextItem.childMenuItems(),
+				nextItemDepth = parseInt( nextItem.menuItemDepth(), 10 ) + 1,
+				prevItem = thisItem.prev(),
+				prevItemDepth = parseInt( prevItem.menuItemDepth(), 10 ),
+				prevItemId = prevItem.getItemData()['menu-item-db-id'],
+				a11ySpeech = menus[ 'moved' + dir.charAt(0).toUpperCase() + dir.slice(1) ];
+
+			switch ( dir ) {
+			case 'up':
+				newItemPosition = thisItemPosition - 1;
+
+				// Already at top.
+				if ( 0 === thisItemPosition )
+					break;
+
+				// If a sub item is moved to top, shift it to 0 depth.
+				if ( 0 === newItemPosition && 0 !== thisItemDepth )
+					thisItem.moveHorizontally( 0, thisItemDepth );
+
+				// If prev item is sub item, shift to match depth.
+				if ( 0 !== prevItemDepth )
+					thisItem.moveHorizontally( prevItemDepth, thisItemDepth );
+
+				// Does this item have sub items?
+				if ( thisItemChildren ) {
+					items = thisItem.add( thisItemChildren );
+					// Move the entire block.
+					items.detach().insertBefore( menuItems.eq( newItemPosition ) ).updateParentMenuItemDBId();
+				} else {
+					thisItem.detach().insertBefore( menuItems.eq( newItemPosition ) ).updateParentMenuItemDBId();
+				}
+				break;
+			case 'down':
+				// Does this item have sub items?
+				if ( thisItemChildren ) {
+					items = thisItem.add( thisItemChildren ),
+						nextItem = menuItems.eq( items.length + thisItemPosition ),
+						nextItemChildren = 0 !== nextItem.childMenuItems().length;
+
+					if ( nextItemChildren ) {
+						newDepth = parseInt( nextItem.menuItemDepth(), 10 ) + 1;
+						thisItem.moveHorizontally( newDepth, thisItemDepth );
+					}
+
+					// Have we reached the bottom?
+					if ( menuItemsCount === thisItemPosition + items.length )
+						break;
+
+					items.detach().insertAfter( menuItems.eq( thisItemPosition + items.length ) ).updateParentMenuItemDBId();
+				} else {
+					// If next item has sub items, shift depth.
+					if ( 0 !== nextItemChildren.length )
+						thisItem.moveHorizontally( nextItemDepth, thisItemDepth );
+
+					// Have we reached the bottom?
+					if ( menuItemsCount === thisItemPosition + 1 )
+						break;
+					thisItem.detach().insertAfter( menuItems.eq( thisItemPosition + 1 ) ).updateParentMenuItemDBId();
+				}
+				break;
+			case 'top':
+				// Already at top.
+				if ( 0 === thisItemPosition )
+					break;
+				// Does this item have sub items?
+				if ( thisItemChildren ) {
+					items = thisItem.add( thisItemChildren );
+					// Move the entire block.
+					items.detach().insertBefore( menuItems.eq( 0 ) ).updateParentMenuItemDBId();
+				} else {
+					thisItem.detach().insertBefore( menuItems.eq( 0 ) ).updateParentMenuItemDBId();
+				}
+				break;
+			case 'left':
+				// As far left as possible.
+				if ( 0 === thisItemDepth )
+					break;
+				thisItem.shiftHorizontally( -1 );
+				break;
+			case 'right':
+				// Can't be sub item at top.
+				if ( 0 === thisItemPosition )
+					break;
+				// Already sub item of prevItem.
+				if ( thisItemData['menu-item-parent-id'] === prevItemId )
+					break;
+				thisItem.shiftHorizontally( 1 );
+				break;
+			}
+			$this.trigger( 'focus' );
+			api.registerChange();
+			api.refreshKeyboardAccessibility();
+			api.refreshAdvancedAccessibility();
+
+			if ( a11ySpeech ) {
+				wp.a11y.speak( a11ySpeech );
+			}
+		},
+
+		initAccessibility : function() {
+			var menu = $( '#menu-to-edit' );
+
+			api.refreshKeyboardAccessibility();
+			api.refreshAdvancedAccessibility();
+
+			// Refresh the accessibility when the user comes close to the item in any way.
+			menu.on( 'mouseenter.refreshAccessibility focus.refreshAccessibility touchstart.refreshAccessibility' , '.menu-item' , function(){
+				api.refreshAdvancedAccessibilityOfItem( $( this ).find( 'a.item-edit' ) );
+			} );
+
+			// We have to update on click as well because we might hover first, change the item, and then click.
+			menu.on( 'click', 'a.item-edit', function() {
+				api.refreshAdvancedAccessibilityOfItem( $( this ) );
+			} );
+
+			// Links for moving items.
+			menu.on( 'click', '.menus-move', function () {
+				var $this = $( this ),
+					dir = $this.data( 'dir' );
+
+				if ( 'undefined' !== typeof dir ) {
+					api.moveMenuItem( $( this ).parents( 'li.menu-item' ).find( 'a.item-edit' ), dir );
+				}
+			});
+		},
+
+		/**
+		 * refreshAdvancedAccessibilityOfItem( [itemToRefresh] )
+		 *
+		 * Refreshes advanced accessibility buttons for one menu item.
+		 * Shows or hides buttons based on the location of the menu item.
+		 *
+		 * @param {Object} itemToRefresh The menu item that might need its advanced accessibility buttons refreshed
+		 */
+		refreshAdvancedAccessibilityOfItem : function( itemToRefresh ) {
+
+			// Only refresh accessibility when necessary.
+			if ( true !== $( itemToRefresh ).data( 'needs_accessibility_refresh' ) ) {
+				return;
+			}
+
+			var thisLink, thisLinkText, primaryItems, itemPosition, title,
+				parentItem, parentItemId, parentItemName, subItems,
+				$this = $( itemToRefresh ),
+				menuItem = $this.closest( 'li.menu-item' ).first(),
+				depth = menuItem.menuItemDepth(),
+				isPrimaryMenuItem = ( 0 === depth ),
+				itemName = $this.closest( '.menu-item-handle' ).find( '.menu-item-title' ).text(),
+				position = parseInt( menuItem.index(), 10 ),
+				prevItemDepth = ( isPrimaryMenuItem ) ? depth : parseInt( depth - 1, 10 ),
+				prevItemNameLeft = menuItem.prevAll('.menu-item-depth-' + prevItemDepth).first().find( '.menu-item-title' ).text(),
+				prevItemNameRight = menuItem.prevAll('.menu-item-depth-' + depth).first().find( '.menu-item-title' ).text(),
+				totalMenuItems = $('#menu-to-edit li').length,
+				hasSameDepthSibling = menuItem.nextAll( '.menu-item-depth-' + depth ).length;
+
+				menuItem.find( '.field-move' ).toggle( totalMenuItems > 1 );
+
+			// Where can they move this menu item?
+			if ( 0 !== position ) {
+				thisLink = menuItem.find( '.menus-move-up' );
+				thisLink.attr( 'aria-label', menus.moveUp ).css( 'display', 'inline' );
+			}
+
+			if ( 0 !== position && isPrimaryMenuItem ) {
+				thisLink = menuItem.find( '.menus-move-top' );
+				thisLink.attr( 'aria-label', menus.moveToTop ).css( 'display', 'inline' );
+			}
+
+			if ( position + 1 !== totalMenuItems && 0 !== position ) {
+				thisLink = menuItem.find( '.menus-move-down' );
+				thisLink.attr( 'aria-label', menus.moveDown ).css( 'display', 'inline' );
+			}
+
+			if ( 0 === position && 0 !== hasSameDepthSibling ) {
+				thisLink = menuItem.find( '.menus-move-down' );
+				thisLink.attr( 'aria-label', menus.moveDown ).css( 'display', 'inline' );
+			}
+
+			if ( ! isPrimaryMenuItem ) {
+				thisLink = menuItem.find( '.menus-move-left' ),
+				thisLinkText = menus.outFrom.replace( '%s', prevItemNameLeft );
+				thisLink.attr( 'aria-label', menus.moveOutFrom.replace( '%s', prevItemNameLeft ) ).text( thisLinkText ).css( 'display', 'inline' );
+			}
+
+			if ( 0 !== position ) {
+				if ( menuItem.find( '.menu-item-data-parent-id' ).val() !== menuItem.prev().find( '.menu-item-data-db-id' ).val() ) {
+					thisLink = menuItem.find( '.menus-move-right' ),
+					thisLinkText = menus.under.replace( '%s', prevItemNameRight );
+					thisLink.attr( 'aria-label', menus.moveUnder.replace( '%s', prevItemNameRight ) ).text( thisLinkText ).css( 'display', 'inline' );
+				}
+			}
+
+			if ( isPrimaryMenuItem ) {
+				primaryItems = $( '.menu-item-depth-0' ),
+				itemPosition = primaryItems.index( menuItem ) + 1,
+				totalMenuItems = primaryItems.length,
+
+				// String together help text for primary menu items.
+				title = menus.menuFocus.replace( '%1$s', itemName ).replace( '%2$d', itemPosition ).replace( '%3$d', totalMenuItems );
+			} else {
+				parentItem = menuItem.prevAll( '.menu-item-depth-' + parseInt( depth - 1, 10 ) ).first(),
+				parentItemId = parentItem.find( '.menu-item-data-db-id' ).val(),
+				parentItemName = parentItem.find( '.menu-item-title' ).text(),
+				subItems = $( '.menu-item .menu-item-data-parent-id[value="' + parentItemId + '"]' ),
+				itemPosition = $( subItems.parents('.menu-item').get().reverse() ).index( menuItem ) + 1;
+
+				// String together help text for sub menu items.
+				title = menus.subMenuFocus.replace( '%1$s', itemName ).replace( '%2$d', itemPosition ).replace( '%3$s', parentItemName );
+			}
+
+			$this.attr( 'aria-label', title );
+
+			// Mark this item's accessibility as refreshed.
+			$this.data( 'needs_accessibility_refresh', false );
+		},
+
+		/**
+		 * refreshAdvancedAccessibility
+		 *
+		 * Hides all advanced accessibility buttons and marks them for refreshing.
+		 */
+		refreshAdvancedAccessibility : function() {
+
+			// Hide all the move buttons by default.
+			$( '.menu-item-settings .field-move .menus-move' ).hide();
+
+			// Mark all menu items as unprocessed.
+			$( 'a.item-edit' ).data( 'needs_accessibility_refresh', true );
+
+			// All open items have to be refreshed or they will show no links.
+			$( '.menu-item-edit-active a.item-edit' ).each( function() {
+				api.refreshAdvancedAccessibilityOfItem( this );
+			} );
+		},
+
+		refreshKeyboardAccessibility : function() {
+			$( 'a.item-edit' ).off( 'focus' ).on( 'focus', function(){
+				$(this).off( 'keydown' ).on( 'keydown', function(e){
+
+					var arrows,
+						$this = $( this ),
+						thisItem = $this.parents( 'li.menu-item' ),
+						thisItemData = thisItem.getItemData();
+
+					// Bail if it's not an arrow key.
+					if ( 37 != e.which && 38 != e.which && 39 != e.which && 40 != e.which )
+						return;
+
+					// Avoid multiple keydown events.
+					$this.off('keydown');
+
+					// Bail if there is only one menu item.
+					if ( 1 === $('#menu-to-edit li').length )
+						return;
+
+					// If RTL, swap left/right arrows.
+					arrows = { '38': 'up', '40': 'down', '37': 'left', '39': 'right' };
+					if ( $('body').hasClass('rtl') )
+						arrows = { '38' : 'up', '40' : 'down', '39' : 'left', '37' : 'right' };
+
+					switch ( arrows[e.which] ) {
+					case 'up':
+						api.moveMenuItem( $this, 'up' );
+						break;
+					case 'down':
+						api.moveMenuItem( $this, 'down' );
+						break;
+					case 'left':
+						api.moveMenuItem( $this, 'left' );
+						break;
+					case 'right':
+						api.moveMenuItem( $this, 'right' );
+						break;
+					}
+					// Put focus back on same menu item.
+					$( '#edit-' + thisItemData['menu-item-db-id'] ).trigger( 'focus' );
+					return false;
+				});
+			});
+		},
+
+		initPreviewing : function() {
+			// Update the item handle title when the navigation label is changed.
+			$( '#menu-to-edit' ).on( 'change input', '.edit-menu-item-title', function(e) {
+				var input = $( e.currentTarget ), title, titleEl;
+				title = input.val();
+				titleEl = input.closest( '.menu-item' ).find( '.menu-item-title' );
+				// Don't update to empty title.
+				if ( title ) {
+					titleEl.text( title ).removeClass( 'no-title' );
+				} else {
+					titleEl.text( wp.i18n._x( '(no label)', 'missing menu item navigation label' ) ).addClass( 'no-title' );
+				}
+			} );
+		},
+
+		initToggles : function() {
+			// Init postboxes.
+			postboxes.add_postbox_toggles('nav-menus');
+
+			// Adjust columns functions for menus UI.
+			columns.useCheckboxesForHidden();
+			columns.checked = function(field) {
+				$('.field-' + field).removeClass('hidden-field');
+			};
+			columns.unchecked = function(field) {
+				$('.field-' + field).addClass('hidden-field');
+			};
+			// Hide fields.
+			api.menuList.hideAdvancedMenuItemFields();
+
+			$('.hide-postbox-tog').on( 'click', function () {
+				var hidden = $( '.accordion-container li.accordion-section' ).filter(':hidden').map(function() { return this.id; }).get().join(',');
+				$.post(ajaxurl, {
+					action: 'closed-postboxes',
+					hidden: hidden,
+					closedpostboxesnonce: jQuery('#closedpostboxesnonce').val(),
+					page: 'nav-menus'
+				});
+			});
+		},
+
+		initSortables : function() {
+			var currentDepth = 0, originalDepth, minDepth, maxDepth,
+				prev, next, prevBottom, nextThreshold, helperHeight, transport,
+				menuEdge = api.menuList.offset().left,
+				body = $('body'), maxChildDepth,
+				menuMaxDepth = initialMenuMaxDepth();
+
+			if( 0 !== $( '#menu-to-edit li' ).length )
+				$( '.drag-instructions' ).show();
+
+			// Use the right edge if RTL.
+			menuEdge += api.isRTL ? api.menuList.width() : 0;
+
+			api.menuList.sortable({
+				handle: '.menu-item-handle',
+				placeholder: 'sortable-placeholder',
+				items: api.options.sortableItems,
+				start: function(e, ui) {
+					var height, width, parent, children, tempHolder;
+
+					// Handle placement for RTL orientation.
+					if ( api.isRTL )
+						ui.item[0].style.right = 'auto';
+
+					transport = ui.item.children('.menu-item-transport');
+
+					// Set depths. currentDepth must be set before children are located.
+					originalDepth = ui.item.menuItemDepth();
+					updateCurrentDepth(ui, originalDepth);
+
+					// Attach child elements to parent.
+					// Skip the placeholder.
+					parent = ( ui.item.next()[0] == ui.placeholder[0] ) ? ui.item.next() : ui.item;
+					children = parent.childMenuItems();
+					transport.append( children );
+
+					// Update the height of the placeholder to match the moving item.
+					height = transport.outerHeight();
+					// If there are children, account for distance between top of children and parent.
+					height += ( height > 0 ) ? (ui.placeholder.css('margin-top').slice(0, -2) * 1) : 0;
+					height += ui.helper.outerHeight();
+					helperHeight = height;
+					height -= 2;                                              // Subtract 2 for borders.
+					ui.placeholder.height(height);
+
+					// Update the width of the placeholder to match the moving item.
+					maxChildDepth = originalDepth;
+					children.each(function(){
+						var depth = $(this).menuItemDepth();
+						maxChildDepth = (depth > maxChildDepth) ? depth : maxChildDepth;
+					});
+					width = ui.helper.find('.menu-item-handle').outerWidth(); // Get original width.
+					width += api.depthToPx(maxChildDepth - originalDepth);    // Account for children.
+					width -= 2;                                               // Subtract 2 for borders.
+					ui.placeholder.width(width);
+
+					// Update the list of menu items.
+					tempHolder = ui.placeholder.next( '.menu-item' );
+					tempHolder.css( 'margin-top', helperHeight + 'px' ); // Set the margin to absorb the placeholder.
+					ui.placeholder.detach();         // Detach or jQuery UI will think the placeholder is a menu item.
+					$(this).sortable( 'refresh' );   // The children aren't sortable. We should let jQuery UI know.
+					ui.item.after( ui.placeholder ); // Reattach the placeholder.
+					tempHolder.css('margin-top', 0); // Reset the margin.
+
+					// Now that the element is complete, we can update...
+					updateSharedVars(ui);
+				},
+				stop: function(e, ui) {
+					var children, subMenuTitle,
+						depthChange = currentDepth - originalDepth;
+
+					// Return child elements to the list.
+					children = transport.children().insertAfter(ui.item);
+
+					// Add "sub menu" description.
+					subMenuTitle = ui.item.find( '.item-title .is-submenu' );
+					if ( 0 < currentDepth )
+						subMenuTitle.show();
+					else
+						subMenuTitle.hide();
+
+					// Update depth classes.
+					if ( 0 !== depthChange ) {
+						ui.item.updateDepthClass( currentDepth );
+						children.shiftDepthClass( depthChange );
+						updateMenuMaxDepth( depthChange );
+					}
+					// Register a change.
+					api.registerChange();
+					// Update the item data.
+					ui.item.updateParentMenuItemDBId();
+
+					// Address sortable's incorrectly-calculated top in Opera.
+					ui.item[0].style.top = 0;
+
+					// Handle drop placement for rtl orientation.
+					if ( api.isRTL ) {
+						ui.item[0].style.left = 'auto';
+						ui.item[0].style.right = 0;
+					}
+
+					api.refreshKeyboardAccessibility();
+					api.refreshAdvancedAccessibility();
+				},
+				change: function(e, ui) {
+					// Make sure the placeholder is inside the menu.
+					// Otherwise fix it, or we're in trouble.
+					if( ! ui.placeholder.parent().hasClass('menu') )
+						(prev.length) ? prev.after( ui.placeholder ) : api.menuList.prepend( ui.placeholder );
+
+					updateSharedVars(ui);
+				},
+				sort: function(e, ui) {
+					var offset = ui.helper.offset(),
+						edge = api.isRTL ? offset.left + ui.helper.width() : offset.left,
+						depth = api.negateIfRTL * api.pxToDepth( edge - menuEdge );
+
+					/*
+					 * Check and correct if depth is not within range.
+					 * Also, if the dragged element is dragged upwards over an item,
+					 * shift the placeholder to a child position.
+					 */
+					if ( depth > maxDepth || offset.top < ( prevBottom - api.options.targetTolerance ) ) {
+						depth = maxDepth;
+					} else if ( depth < minDepth ) {
+						depth = minDepth;
+					}
+
+					if( depth != currentDepth )
+						updateCurrentDepth(ui, depth);
+
+					// If we overlap the next element, manually shift downwards.
+					if( nextThreshold && offset.top + helperHeight > nextThreshold ) {
+						next.after( ui.placeholder );
+						updateSharedVars( ui );
+						$( this ).sortable( 'refreshPositions' );
+					}
+				}
+			});
+
+			function updateSharedVars(ui) {
+				var depth;
+
+				prev = ui.placeholder.prev( '.menu-item' );
+				next = ui.placeholder.next( '.menu-item' );
+
+				// Make sure we don't select the moving item.
+				if( prev[0] == ui.item[0] ) prev = prev.prev( '.menu-item' );
+				if( next[0] == ui.item[0] ) next = next.next( '.menu-item' );
+
+				prevBottom = (prev.length) ? prev.offset().top + prev.height() : 0;
+				nextThreshold = (next.length) ? next.offset().top + next.height() / 3 : 0;
+				minDepth = (next.length) ? next.menuItemDepth() : 0;
+
+				if( prev.length )
+					maxDepth = ( (depth = prev.menuItemDepth() + 1) > api.options.globalMaxDepth ) ? api.options.globalMaxDepth : depth;
+				else
+					maxDepth = 0;
+			}
+
+			function updateCurrentDepth(ui, depth) {
+				ui.placeholder.updateDepthClass( depth, currentDepth );
+				currentDepth = depth;
+			}
+
+			function initialMenuMaxDepth() {
+				if( ! body[0].className ) return 0;
+				var match = body[0].className.match(/menu-max-depth-(\d+)/);
+				return match && match[1] ? parseInt( match[1], 10 ) : 0;
+			}
+
+			function updateMenuMaxDepth( depthChange ) {
+				var depth, newDepth = menuMaxDepth;
+				if ( depthChange === 0 ) {
+					return;
+				} else if ( depthChange > 0 ) {
+					depth = maxChildDepth + depthChange;
+					if( depth > menuMaxDepth )
+						newDepth = depth;
+				} else if ( depthChange < 0 && maxChildDepth == menuMaxDepth ) {
+					while( ! $('.menu-item-depth-' + newDepth, api.menuList).length && newDepth > 0 )
+						newDepth--;
+				}
+				// Update the depth class.
+				body.removeClass( 'menu-max-depth-' + menuMaxDepth ).addClass( 'menu-max-depth-' + newDepth );
+				menuMaxDepth = newDepth;
+			}
+		},
+
+		initManageLocations : function () {
+			$('#menu-locations-wrap form').on( 'submit', function(){
+				window.onbeforeunload = null;
+			});
+			$('.menu-location-menus select').on('change', function () {
+				var editLink = $(this).closest('tr').find('.locations-edit-menu-link');
+				if ($(this).find('option:selected').data('orig'))
+					editLink.show();
+				else
+					editLink.hide();
+			});
+		},
+
+		attachMenuEditListeners : function() {
+			var that = this;
+			$('#update-nav-menu').on('click', function(e) {
+				if ( e.target && e.target.className ) {
+					if ( -1 != e.target.className.indexOf('item-edit') ) {
+						return that.eventOnClickEditLink(e.target);
+					} else if ( -1 != e.target.className.indexOf('menu-save') ) {
+						return that.eventOnClickMenuSave(e.target);
+					} else if ( -1 != e.target.className.indexOf('menu-delete') ) {
+						return that.eventOnClickMenuDelete(e.target);
+					} else if ( -1 != e.target.className.indexOf('item-delete') ) {
+						return that.eventOnClickMenuItemDelete(e.target);
+					} else if ( -1 != e.target.className.indexOf('item-cancel') ) {
+						return that.eventOnClickCancelLink(e.target);
+					}
+				}
+			});
+
+			$( '#menu-name' ).on( 'input', _.debounce( function () {
+				var menuName = $( document.getElementById( 'menu-name' ) ),
+					menuNameVal = menuName.val();
+
+				if ( ! menuNameVal || ! menuNameVal.replace( /\s+/, '' ) ) {
+					// Add warning for invalid menu name.
+					menuName.parent().addClass( 'form-invalid' );
+				} else {
+					// Remove warning for valid menu name.
+					menuName.parent().removeClass( 'form-invalid' );
+				}
+			}, 500 ) );
+
+			$('#add-custom-links input[type="text"]').on( 'keypress', function(e){
+				$('#customlinkdiv').removeClass('form-invalid');
+
+				if ( e.keyCode === 13 ) {
+					e.preventDefault();
+					$( '#submit-customlinkdiv' ).trigger( 'click' );
+				}
+			});
+		},
+
+		/**
+		 * Handle toggling bulk selection checkboxes for menu items.
+		 *
+		 * @since 5.8.0
+		 */ 
+		attachBulkSelectButtonListeners : function() {
+			var that = this;
+
+			$( '.bulk-select-switcher' ).on( 'change', function() {
+				if ( this.checked ) {
+					$( '.bulk-select-switcher' ).prop( 'checked', true );
+					that.enableBulkSelection();
+				} else {
+					$( '.bulk-select-switcher' ).prop( 'checked', false );
+					that.disableBulkSelection();
+				}
+			});
+		},
+
+		/**
+		 * Enable bulk selection checkboxes for menu items.
+		 *
+		 * @since 5.8.0
+		 */ 
+		enableBulkSelection : function() {
+			var checkbox = $( '#menu-to-edit .menu-item-checkbox' );
+
+			$( '#menu-to-edit' ).addClass( 'bulk-selection' );
+			$( '#nav-menu-bulk-actions-top' ).addClass( 'bulk-selection' );
+			$( '#nav-menu-bulk-actions-bottom' ).addClass( 'bulk-selection' );
+
+			$.each( checkbox, function() {
+				$(this).prop( 'disabled', false );
+			});
+		},
+
+		/**
+		 * Disable bulk selection checkboxes for menu items.
+		 *
+		 * @since 5.8.0
+		 */ 
+		disableBulkSelection : function() {
+			var checkbox = $( '#menu-to-edit .menu-item-checkbox' );
+
+			$( '#menu-to-edit' ).removeClass( 'bulk-selection' );
+			$( '#nav-menu-bulk-actions-top' ).removeClass( 'bulk-selection' );
+			$( '#nav-menu-bulk-actions-bottom' ).removeClass( 'bulk-selection' );
+
+			if ( $( '.menu-items-delete' ).is( '[aria-describedby="pending-menu-items-to-delete"]' ) ) {
+				$( '.menu-items-delete' ).removeAttr( 'aria-describedby' );
+			}
+
+			$.each( checkbox, function() {
+				$(this).prop( 'disabled', true ).prop( 'checked', false );
+			});
+
+			$( '.menu-items-delete' ).addClass( 'disabled' );
+			$( '#pending-menu-items-to-delete ul' ).empty();
+		},
+
+		/**
+		 * Listen for state changes on bulk action checkboxes.
+		 *
+		 * @since 5.8.0
+		 */ 
+		attachMenuCheckBoxListeners : function() {
+			var that = this;
+
+			$( '#menu-to-edit' ).on( 'change', '.menu-item-checkbox', function() {
+				that.setRemoveSelectedButtonStatus();
+			});
+		},
+
+		/**
+		 * Create delete button to remove menu items from collection.
+		 *
+		 * @since 5.8.0
+		 */ 
+		attachMenuItemDeleteButton : function() {
+			var that = this;
+
+			$( document ).on( 'click', '.menu-items-delete', function( e ) {
+				var itemsPendingDeletion, itemsPendingDeletionList, deletionSpeech;
+
+				e.preventDefault();
+
+				if ( ! $(this).hasClass( 'disabled' ) ) {
+					$.each( $( '.menu-item-checkbox:checked' ), function( index, element ) {
+						$( element ).parents( 'li' ).find( 'a.item-delete' ).trigger( 'click' );
+					});
+
+					$( '.menu-items-delete' ).addClass( 'disabled' );
+					$( '.bulk-select-switcher' ).prop( 'checked', false );
+
+					itemsPendingDeletion     = '';
+					itemsPendingDeletionList = $( '#pending-menu-items-to-delete ul li' );
+
+					$.each( itemsPendingDeletionList, function( index, element ) {
+						var itemName = $( element ).find( '.pending-menu-item-name' ).text();
+						var itemSpeech = menus.menuItemDeletion.replace( '%s', itemName );
+
+						itemsPendingDeletion += itemSpeech;
+						if ( ( index + 1 ) < itemsPendingDeletionList.length ) {
+							itemsPendingDeletion += ', ';
+						}
+					});
+
+					deletionSpeech = menus.itemsDeleted.replace( '%s', itemsPendingDeletion );
+					wp.a11y.speak( deletionSpeech, 'polite' );
+					that.disableBulkSelection();
+				}
+			});
+		},
+
+		/**
+		 * List menu items awaiting deletion.
+		 *
+		 * @since 5.8.0
+		 */ 
+		attachPendingMenuItemsListForDeletion : function() {
+			$( '#post-body-content' ).on( 'change', '.menu-item-checkbox', function() {
+				var menuItemName, menuItemType, menuItemID, listedMenuItem;
+
+				if ( ! $( '.menu-items-delete' ).is( '[aria-describedby="pending-menu-items-to-delete"]' ) ) {
+					$( '.menu-items-delete' ).attr( 'aria-describedby', 'pending-menu-items-to-delete' );
+				}
+
+				menuItemName = $(this).next().text();
+				menuItemType = $(this).parent().next( '.item-controls' ).find( '.item-type' ).text();
+				menuItemID   = $(this).attr( 'data-menu-item-id' );
+
+				listedMenuItem = $( '#pending-menu-items-to-delete ul' ).find( '[data-menu-item-id=' + menuItemID + ']' );
+				if ( listedMenuItem.length > 0 ) {
+					listedMenuItem.remove();
+				}
+
+				if ( this.checked === true ) {
+					$( '#pending-menu-items-to-delete ul' ).append(
+						'<li data-menu-item-id="' + menuItemID + '">' +
+							'<span class="pending-menu-item-name">' + menuItemName + '</span> ' +
+							'<span class="pending-menu-item-type">(' + menuItemType + ')</span>' +
+							'<span class="separator"></span>' +
+						'</li>'
+					);
+				}
+
+				$( '#pending-menu-items-to-delete li .separator' ).html( ', ' );
+				$( '#pending-menu-items-to-delete li .separator' ).last().html( '.' );
+			});
+		},
+
+		/**
+		 * Set status of bulk delete checkbox.
+		 *
+		 * @since 5.8.0
+		 */ 
+		setBulkDeleteCheckboxStatus : function() {
+			var that = this;
+			var checkbox = $( '#menu-to-edit .menu-item-checkbox' );
+
+			$.each( checkbox, function() {
+				if ( $(this).prop( 'disabled' ) ) {
+					$(this).prop( 'disabled', false );
+				} else {
+					$(this).prop( 'disabled', true );
+				}
+
+				if ( $(this).is( ':checked' ) ) {
+					$(this).prop( 'checked', false );
+				}
+			});
+
+			that.setRemoveSelectedButtonStatus();
+		},
+
+		/**
+		 * Set status of menu items removal button.
+		 *
+		 * @since 5.8.0
+		 */ 
+		setRemoveSelectedButtonStatus : function() {
+			var button = $( '.menu-items-delete' );
+
+			if ( $( '.menu-item-checkbox:checked' ).length > 0 ) {
+				button.removeClass( 'disabled' );
+			} else {
+				button.addClass( 'disabled' );
+			}
+		},
+
+		attachMenuSaveSubmitListeners : function() {
+			/*
+			 * When a navigation menu is saved, store a JSON representation of all form data
+			 * in a single input to avoid PHP `max_input_vars` limitations. See #14134.
+			 */
+			$( '#update-nav-menu' ).on( 'submit', function() {
+				var navMenuData = $( '#update-nav-menu' ).serializeArray();
+				$( '[name="nav-menu-data"]' ).val( JSON.stringify( navMenuData ) );
+			});
+		},
+
+		attachThemeLocationsListeners : function() {
+			var loc = $('#nav-menu-theme-locations'), params = {};
+			params.action = 'menu-locations-save';
+			params['menu-settings-column-nonce'] = $('#menu-settings-column-nonce').val();
+			loc.find('input[type="submit"]').on( 'click', function() {
+				loc.find('select').each(function() {
+					params[this.name] = $(this).val();
+				});
+				loc.find( '.spinner' ).addClass( 'is-active' );
+				$.post( ajaxurl, params, function() {
+					loc.find( '.spinner' ).removeClass( 'is-active' );
+				});
+				return false;
+			});
+		},
+
+		attachQuickSearchListeners : function() {
+			var searchTimer;
+
+			// Prevent form submission.
+			$( '#nav-menu-meta' ).on( 'submit', function( event ) {
+				event.preventDefault();
+			});
+
+			$( '#nav-menu-meta' ).on( 'input', '.quick-search', function() {
+				var $this = $( this );
+
+				$this.attr( 'autocomplete', 'off' );
+
+				if ( searchTimer ) {
+					clearTimeout( searchTimer );
+				}
+
+				searchTimer = setTimeout( function() {
+					api.updateQuickSearchResults( $this );
+				}, 500 );
+			}).on( 'blur', '.quick-search', function() {
+				api.lastSearch = '';
+			});
+		},
+
+		updateQuickSearchResults : function(input) {
+			var panel, params,
+				minSearchLength = 2,
+				q = input.val();
+
+			/*
+			 * Minimum characters for a search. Also avoid a new Ajax search when
+			 * the pressed key (e.g. arrows) doesn't change the searched term.
+			 */
+			if ( q.length < minSearchLength || api.lastSearch == q ) {
+				return;
+			}
+
+			api.lastSearch = q;
+
+			panel = input.parents('.tabs-panel');
+			params = {
+				'action': 'menu-quick-search',
+				'response-format': 'markup',
+				'menu': $('#menu').val(),
+				'menu-settings-column-nonce': $('#menu-settings-column-nonce').val(),
+				'q': q,
+				'type': input.attr('name')
+			};
+
+			$( '.spinner', panel ).addClass( 'is-active' );
+
+			$.post( ajaxurl, params, function(menuMarkup) {
+				api.processQuickSearchQueryResponse(menuMarkup, params, panel);
+			});
+		},
+
+		addCustomLink : function( processMethod ) {
+			var url = $('#custom-menu-item-url').val().toString(),
+				label = $('#custom-menu-item-name').val();
+
+			if ( '' !== url ) {
+				url = url.trim();
+			}
+
+			processMethod = processMethod || api.addMenuItemToBottom;
+
+			if ( '' === url || 'https://' == url || 'http://' == url ) {
+				$('#customlinkdiv').addClass('form-invalid');
+				return false;
+			}
+
+			// Show the Ajax spinner.
+			$( '.customlinkdiv .spinner' ).addClass( 'is-active' );
+			this.addLinkToMenu( url, label, processMethod, function() {
+				// Remove the Ajax spinner.
+				$( '.customlinkdiv .spinner' ).removeClass( 'is-active' );
+				// Set custom link form back to defaults.
+				$('#custom-menu-item-name').val('').trigger( 'blur' );
+				$( '#custom-menu-item-url' ).val( '' ).attr( 'placeholder', 'https://' );
+			});
+		},
+
+		addLinkToMenu : function(url, label, processMethod, callback) {
+			processMethod = processMethod || api.addMenuItemToBottom;
+			callback = callback || function(){};
+
+			api.addItemToMenu({
+				'-1': {
+					'menu-item-type': 'custom',
+					'menu-item-url': url,
+					'menu-item-title': label
+				}
+			}, processMethod, callback);
+		},
+
+		addItemToMenu : function(menuItem, processMethod, callback) {
+			var menu = $('#menu').val(),
+				nonce = $('#menu-settings-column-nonce').val(),
+				params;
+
+			processMethod = processMethod || function(){};
+			callback = callback || function(){};
+
+			params = {
+				'action': 'add-menu-item',
+				'menu': menu,
+				'menu-settings-column-nonce': nonce,
+				'menu-item': menuItem
+			};
+
+			$.post( ajaxurl, params, function(menuMarkup) {
+				var ins = $('#menu-instructions');
+
+				menuMarkup = menuMarkup || '';
+				menuMarkup = menuMarkup.toString().trim(); // Trim leading whitespaces.
+				processMethod(menuMarkup, params);
+
+				// Make it stand out a bit more visually, by adding a fadeIn.
+				$( 'li.pending' ).hide().fadeIn('slow');
+				$( '.drag-instructions' ).show();
+				if( ! ins.hasClass( 'menu-instructions-inactive' ) && ins.siblings().length )
+					ins.addClass( 'menu-instructions-inactive' );
+
+				callback();
+			});
+		},
+
+		/**
+		 * Process the add menu item request response into menu list item. Appends to menu.
+		 *
+		 * @param {string} menuMarkup The text server response of menu item markup.
+		 *
+		 * @fires document#menu-item-added Passes menuMarkup as a jQuery object.
+		 */
+		addMenuItemToBottom : function( menuMarkup ) {
+			var $menuMarkup = $( menuMarkup );
+			$menuMarkup.hideAdvancedMenuItemFields().appendTo( api.targetList );
+			api.refreshKeyboardAccessibility();
+			api.refreshAdvancedAccessibility();
+			wp.a11y.speak( menus.itemAdded );
+			$( document ).trigger( 'menu-item-added', [ $menuMarkup ] );
+		},
+
+		/**
+		 * Process the add menu item request response into menu list item. Prepends to menu.
+		 *
+		 * @param {string} menuMarkup The text server response of menu item markup.
+		 *
+		 * @fires document#menu-item-added Passes menuMarkup as a jQuery object.
+		 */
+		addMenuItemToTop : function( menuMarkup ) {
+			var $menuMarkup = $( menuMarkup );
+			$menuMarkup.hideAdvancedMenuItemFields().prependTo( api.targetList );
+			api.refreshKeyboardAccessibility();
+			api.refreshAdvancedAccessibility();
+			wp.a11y.speak( menus.itemAdded );
+			$( document ).trigger( 'menu-item-added', [ $menuMarkup ] );
+		},
+
+		attachUnsavedChangesListener : function() {
+			$('#menu-management input, #menu-management select, #menu-management, #menu-management textarea, .menu-location-menus select').on( 'change', function(){
+				api.registerChange();
+			});
+
+			if ( 0 !== $('#menu-to-edit').length || 0 !== $('.menu-location-menus select').length ) {
+				window.onbeforeunload = function(){
+					if ( api.menusChanged )
+						return wp.i18n.__( 'The changes you made will be lost if you navigate away from this page.' );
+				};
+			} else {
+				// Make the post boxes read-only, as they can't be used yet.
+				$( '#menu-settings-column' ).find( 'input,select' ).end().find( 'a' ).attr( 'href', '#' ).off( 'click' );
+			}
+		},
+
+		registerChange : function() {
+			api.menusChanged = true;
+		},
+
+		attachTabsPanelListeners : function() {
+			$('#menu-settings-column').on('click', function(e) {
+				var selectAreaMatch, selectAll, panelId, wrapper, items,
+					target = $(e.target);
+
+				if ( target.hasClass('nav-tab-link') ) {
+
+					panelId = target.data( 'type' );
+
+					wrapper = target.parents('.accordion-section-content').first();
+
+					// Upon changing tabs, we want to uncheck all checkboxes.
+					$( 'input', wrapper ).prop( 'checked', false );
+
+					$('.tabs-panel-active', wrapper).removeClass('tabs-panel-active').addClass('tabs-panel-inactive');
+					$('#' + panelId, wrapper).removeClass('tabs-panel-inactive').addClass('tabs-panel-active');
+
+					$('.tabs', wrapper).removeClass('tabs');
+					target.parent().addClass('tabs');
+
+					// Select the search bar.
+					$('.quick-search', wrapper).trigger( 'focus' );
+
+					// Hide controls in the search tab if no items found.
+					if ( ! wrapper.find( '.tabs-panel-active .menu-item-title' ).length ) {
+						wrapper.addClass( 'has-no-menu-item' );
+					} else {
+						wrapper.removeClass( 'has-no-menu-item' );
+					}
+
+					e.preventDefault();
+				} else if ( target.hasClass( 'select-all' ) ) {
+					selectAreaMatch = target.closest( '.button-controls' ).data( 'items-type' );
+					if ( selectAreaMatch ) {
+						items = $( '#' + selectAreaMatch + ' .tabs-panel-active .menu-item-title input' );
+
+						if ( items.length === items.filter( ':checked' ).length && ! target.is( ':checked' ) ) {
+							items.prop( 'checked', false );
+						} else if ( target.is( ':checked' ) ) {
+							items.prop( 'checked', true );
+						}
+					}
+				} else if ( target.hasClass( 'menu-item-checkbox' ) ) {
+					selectAreaMatch = target.closest( '.tabs-panel-active' ).parent().attr( 'id' );
+					if ( selectAreaMatch ) {
+						items     = $( '#' + selectAreaMatch + ' .tabs-panel-active .menu-item-title input' );
+						selectAll = $( '.button-controls[data-items-type="' + selectAreaMatch + '"] .select-all' );
+
+						if ( items.length === items.filter( ':checked' ).length && ! selectAll.is( ':checked' ) ) {
+							selectAll.prop( 'checked', true );
+						} else if ( selectAll.is( ':checked' ) ) {
+							selectAll.prop( 'checked', false );
+						}
+					}
+				} else if ( target.hasClass('submit-add-to-menu') ) {
+					api.registerChange();
+
+					if ( e.target.id && 'submit-customlinkdiv' == e.target.id )
+						api.addCustomLink( api.addMenuItemToBottom );
+					else if ( e.target.id && -1 != e.target.id.indexOf('submit-') )
+						$('#' + e.target.id.replace(/submit-/, '')).addSelectedToMenu( api.addMenuItemToBottom );
+					return false;
+				}
+			});
+
+			/*
+			 * Delegate the `click` event and attach it just to the pagination
+			 * links thus excluding the current page `<span>`. See ticket #35577.
+			 */
+			$( '#nav-menu-meta' ).on( 'click', 'a.page-numbers', function() {
+				var $container = $( this ).closest( '.inside' );
+
+				$.post( ajaxurl, this.href.replace( /.*\?/, '' ).replace( /action=([^&]*)/, '' ) + '&action=menu-get-metabox',
+					function( resp ) {
+						var metaBoxData = JSON.parse( resp ),
+							toReplace;
+
+						if ( -1 === resp.indexOf( 'replace-id' ) ) {
+							return;
+						}
+
+						// Get the post type menu meta box to update.
+						toReplace = document.getElementById( metaBoxData['replace-id'] );
+
+						if ( ! metaBoxData.markup || ! toReplace ) {
+							return;
+						}
+
+						// Update the post type menu meta box with new content from the response.
+						$container.html( metaBoxData.markup );
+					}
+				);
+
+				return false;
+			});
+		},
+
+		eventOnClickEditLink : function(clickedEl) {
+			var settings, item,
+			matchedSection = /#(.*)$/.exec(clickedEl.href);
+
+			if ( matchedSection && matchedSection[1] ) {
+				settings = $('#'+matchedSection[1]);
+				item = settings.parent();
+				if( 0 !== item.length ) {
+					if( item.hasClass('menu-item-edit-inactive') ) {
+						if( ! settings.data('menu-item-data') ) {
+							settings.data( 'menu-item-data', settings.getItemData() );
+						}
+						settings.slideDown('fast');
+						item.removeClass('menu-item-edit-inactive')
+							.addClass('menu-item-edit-active');
+					} else {
+						settings.slideUp('fast');
+						item.removeClass('menu-item-edit-active')
+							.addClass('menu-item-edit-inactive');
+					}
+					return false;
+				}
+			}
+		},
+
+		eventOnClickCancelLink : function(clickedEl) {
+			var settings = $( clickedEl ).closest( '.menu-item-settings' ),
+				thisMenuItem = $( clickedEl ).closest( '.menu-item' );
+
+			thisMenuItem.removeClass( 'menu-item-edit-active' ).addClass( 'menu-item-edit-inactive' );
+			settings.setItemData( settings.data( 'menu-item-data' ) ).hide();
+			// Restore the title of the currently active/expanded menu item.
+			thisMenuItem.find( '.menu-item-title' ).text( settings.data( 'menu-item-data' )['menu-item-title'] );
+
+			return false;
+		},
+
+		eventOnClickMenuSave : function() {
+			var locs = '',
+			menuName = $('#menu-name'),
+			menuNameVal = menuName.val();
+
+			// Cancel and warn if invalid menu name.
+			if ( ! menuNameVal || ! menuNameVal.replace( /\s+/, '' ) ) {
+				menuName.parent().addClass( 'form-invalid' );
+				return false;
+			}
+			// Copy menu theme locations.
+			$('#nav-menu-theme-locations select').each(function() {
+				locs += '<input type="hidden" name="' + this.name + '" value="' + $(this).val() + '" />';
+			});
+			$('#update-nav-menu').append( locs );
+			// Update menu item position data.
+			api.menuList.find('.menu-item-data-position').val( function(index) { return index + 1; } );
+			window.onbeforeunload = null;
+
+			return true;
+		},
+
+		eventOnClickMenuDelete : function() {
+			// Delete warning AYS.
+			if ( window.confirm( wp.i18n.__( 'You are about to permanently delete this menu.\n\'Cancel\' to stop, \'OK\' to delete.' ) ) ) {
+				window.onbeforeunload = null;
+				return true;
+			}
+			return false;
+		},
+
+		eventOnClickMenuItemDelete : function(clickedEl) {
+			var itemID = parseInt(clickedEl.id.replace('delete-', ''), 10);
+
+			api.removeMenuItem( $('#menu-item-' + itemID) );
+			api.registerChange();
+			return false;
+		},
+
+		/**
+		 * Process the quick search response into a search result
+		 *
+		 * @param string resp The server response to the query.
+		 * @param object req The request arguments.
+		 * @param jQuery panel The tabs panel we're searching in.
+		 */
+		processQuickSearchQueryResponse : function(resp, req, panel) {
+			var matched, newID,
+			takenIDs = {},
+			form = document.getElementById('nav-menu-meta'),
+			pattern = /menu-item[(\[^]\]*/,
+			$items = $('<div>').html(resp).find('li'),
+			wrapper = panel.closest( '.accordion-section-content' ),
+			selectAll = wrapper.find( '.button-controls .select-all' ),
+			$item;
+
+			if( ! $items.length ) {
+				$('.categorychecklist', panel).html( '<li><p>' + wp.i18n.__( 'No results found.' ) + '</p></li>' );
+				$( '.spinner', panel ).removeClass( 'is-active' );
+				wrapper.addClass( 'has-no-menu-item' );
+				return;
+			}
+
+			$items.each(function(){
+				$item = $(this);
+
+				// Make a unique DB ID number.
+				matched = pattern.exec($item.html());
+
+				if ( matched && matched[1] ) {
+					newID = matched[1];
+					while( form.elements['menu-item[' + newID + '][menu-item-type]'] || takenIDs[ newID ] ) {
+						newID--;
+					}
+
+					takenIDs[newID] = true;
+					if ( newID != matched[1] ) {
+						$item.html( $item.html().replace(new RegExp(
+							'menu-item\\[' + matched[1] + '\\]', 'g'),
+							'menu-item[' + newID + ']'
+						) );
+					}
+				}
+			});
+
+			$('.categorychecklist', panel).html( $items );
+			$( '.spinner', panel ).removeClass( 'is-active' );
+			wrapper.removeClass( 'has-no-menu-item' );
+
+			if ( selectAll.is( ':checked' ) ) {
+				selectAll.prop( 'checked', false );
+			}
+		},
+
+		/**
+		 * Remove a menu item.
+		 *
+		 * @param {Object} el The element to be removed as a jQuery object.
+		 *
+		 * @fires document#menu-removing-item Passes the element to be removed.
+		 */
+		removeMenuItem : function(el) {
+			var children = el.childMenuItems();
+
+			$( document ).trigger( 'menu-removing-item', [ el ] );
+			el.addClass('deleting').animate({
+					opacity : 0,
+					height: 0
+				}, 350, function() {
+					var ins = $('#menu-instructions');
+					el.remove();
+					children.shiftDepthClass( -1 ).updateParentMenuItemDBId();
+					if ( 0 === $( '#menu-to-edit li' ).length ) {
+						$( '.drag-instructions' ).hide();
+						ins.removeClass( 'menu-instructions-inactive' );
+					}
+					api.refreshAdvancedAccessibility();
+					wp.a11y.speak( menus.itemRemoved );
+				});
+		},
+
+		depthToPx : function(depth) {
+			return depth * api.options.menuItemDepthPerLevel;
+		},
+
+		pxToDepth : function(px) {
+			return Math.floor(px / api.options.menuItemDepthPerLevel);
+		}
+
+	};
+
+	$( function() {
+
+		wpNavMenu.init();
+
+		// Prevent focused element from being hidden by the sticky footer.
+		$( '.menu-edit a, .menu-edit button, .menu-edit input, .menu-edit textarea, .menu-edit select' ).on('focus', function() {
+			if ( window.innerWidth >= 783 ) {
+				var navMenuHeight = $( '#nav-menu-footer' ).height() + 20;
+				var bottomOffset = $(this).offset().top - ( $(window).scrollTop() + $(window).height() - $(this).height() );
+
+				if ( bottomOffset > 0 ) {
+					bottomOffset = 0;
+				}
+				bottomOffset = bottomOffset * -1;
+
+				if( bottomOffset < navMenuHeight ) {
+					var scrollTop = $(document).scrollTop();
+					$(document).scrollTop( scrollTop + ( navMenuHeight - bottomOffset ) );
+				}
+			}
+		});
+	});
+
+	// Show bulk action.
+	$( document ).on( 'menu-item-added', function() {
+		if ( ! $( '.bulk-actions' ).is( ':visible' ) ) {
+			$( '.bulk-actions' ).show();
+		}
+	} );
+
+	// Hide bulk action.
+	$( document ).on( 'menu-removing-item', function( e, el ) {
+		var menuElement = $( el ).parents( '#menu-to-edit' );
+		if ( menuElement.find( 'li' ).length === 1 && $( '.bulk-actions' ).is( ':visible' ) ) {
+			$( '.bulk-actions' ).hide();
+		}
+	} );
+
+})(jQuery);