text: /**
   * WordPress Administration Navigation Menu
   * Interface JS functions
   *
   * @version 2.0.0
   *
   * @package WordPress
   * @subpackage Administration
   */
  
  /* global menus, postboxes, columns, isRtl, navMenuL10n, ajaxurl */
  
  var wpNavMenu;
  
  (function($) {
  
  	var api;
  
  	api = wpNavMenu = {
  
  		options : {
  			menuItemDepthPerLevel : 30, // Do not use directly. Use depthToPx and pxToDepth instead.
  			globalMaxDepth : 11
  		},
  
  		menuList : undefined,	// Set in init.
  		targetList : undefined, // Set in init.
  		menusChanged : false,
  		isRTL: !! ( 'undefined' != typeof isRtl && isRtl ),
  		negateIfRTL: ( 'undefined' != typeof isRtl && isRtl ) ? -1 : 1,
  
  		// Functions that run on init.
  		init : function() {
  			api.menuList = $('#menu-to-edit');
  			api.targetList = api.menuList;
  
  			this.jQueryExtensions();
  
  			this.attachMenuEditListeners();
  
  			this.setupInputWithDefaultTitle();
  			this.attachQuickSearchListeners();
  			this.attachThemeLocationsListeners();
  
  			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();
  						$(this).removeClass('menu-item-depth-'+ depth )
  							.addClass('menu-item-depth-'+ (depth + change) );
  					});
  				},
  				childMenuItems : function() {
  					var result = $();
  					this.each(function(){
  						var t = $(this), depth = t.menuItemDepth(), next = t.next();
  						while( next.length && next.menuItemDepth() > depth ) {
  							result = result.add( next );
  							next = next.next();
  						}
  					});
  					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.
  				 *
  				 * @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('.spinner').show();
  
  						// 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.removeAttr('checked');
  							t.find('.spinner').hide();
  						});
  					});
  				},
  				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'];
  
  			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.focus();
  			api.registerChange();
  			api.refreshKeyboardAccessibility();
  			api.refreshAdvancedAccessibility();
  		},
  
  		initAccessibility : function() {
  			var menu = $( '#menu-to-edit' );
  
  			api.refreshKeyboardAccessibility();
  			api.refreshAdvancedAccessibility();
  
  			// Events
  			menu.on( 'click', '.menus-move-up', function ( e ) {
  				api.moveMenuItem( $( this ).parents( 'li.menu-item' ).find( 'a.item-edit' ), 'up' );
  				e.preventDefault();
  			});
  			menu.on( 'click', '.menus-move-down', function ( e ) {
  				api.moveMenuItem( $( this ).parents( 'li.menu-item' ).find( 'a.item-edit' ), 'down' );
  				e.preventDefault();
  			});
  			menu.on( 'click', '.menus-move-top', function ( e ) {
  				api.moveMenuItem( $( this ).parents( 'li.menu-item' ).find( 'a.item-edit' ), 'top' );
  				e.preventDefault();
  			});
  			menu.on( 'click', '.menus-move-left', function ( e ) {
  				api.moveMenuItem( $( this ).parents( 'li.menu-item' ).find( 'a.item-edit' ), 'left' );
  				e.preventDefault();
  			});
  			menu.on( 'click', '.menus-move-right', function ( e ) {
  				api.moveMenuItem( $( this ).parents( 'li.menu-item' ).find( 'a.item-edit' ), 'right' );
  				e.preventDefault();
  			});
  		},
  
  		refreshAdvancedAccessibility : function() {
  
  			// Hide all links by default
  			$( '.menu-item-settings .field-move a' ).css( 'display', 'none' );
  
  			$( '.item-edit' ).each( function() {
  				var thisLink, thisLinkText, primaryItems, itemPosition, title,
  					parentItem, parentItemId, parentItemName, subItems,
  					$this = $(this),
  					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;
  
  				// Where can they move this menu item?
  				if ( 0 !== position ) {
  					thisLink = menuItem.find( '.menus-move-up' );
  					thisLink.prop( 'title', menus.moveUp ).css( 'display', 'inline' );
  				}
  
  				if ( 0 !== position && isPrimaryMenuItem ) {
  					thisLink = menuItem.find( '.menus-move-top' );
  					thisLink.prop( 'title', menus.moveToTop ).css( 'display', 'inline' );
  				}
  
  				if ( position + 1 !== totalMenuItems && 0 !== position ) {
  					thisLink = menuItem.find( '.menus-move-down' );
  					thisLink.prop( 'title', menus.moveDown ).css( 'display', 'inline' );
  				}
  
  				if ( 0 === position && 0 !== hasSameDepthSibling ) {
  					thisLink = menuItem.find( '.menus-move-down' );
  					thisLink.prop( 'title', menus.moveDown ).css( 'display', 'inline' );
  				}
  
  				if ( ! isPrimaryMenuItem ) {
  					thisLink = menuItem.find( '.menus-move-left' ),
  					thisLinkText = menus.outFrom.replace( '%s', prevItemNameLeft );
  					thisLink.prop( 'title', 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.prop( 'title', 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.prop('title', title).text( title );
  			});
  		},
  
  		refreshKeyboardAccessibility : function() {
  			$( '.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'] ).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( navMenuL10n.untitled ).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').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',
  				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();
  					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 jQ 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 ) 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();
  				next = ui.placeholder.next();
  
  				// Make sure we don't select the moving item.
  				if( prev[0] == ui.item[0] ) prev = prev.prev();
  				if( next[0] == ui.item[0] ) next = next.next();
  
  				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').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').bind('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);
  					}
  				}
  			});
  			$('#add-custom-links input[type="text"]').keypress(function(e){
  				if ( e.keyCode === 13 ) {
  					e.preventDefault();
  					$( '#submit-customlinkdiv' ).click();
  				}
  			});
  		},
  
  		/**
  		 * An interface for managing default values for input elements
  		 * that is both JS and accessibility-friendly.
  		 *
  		 * Input elements that add the class 'input-with-default-title'
  		 * will have their values set to the provided HTML title when empty.
  		 */
  		setupInputWithDefaultTitle : function() {
  			var name = 'input-with-default-title';
  
  			$('.' + name).each( function(){
  				var $t = $(this), title = $t.attr('title'), val = $t.val();
  				$t.data( name, title );
  
  				if( '' === val ) $t.val( title );
  				else if ( title == val ) return;
  				else $t.removeClass( name );
  			}).focus( function(){
  				var $t = $(this);
  				if( $t.val() == $t.data(name) )
  					$t.val('').removeClass( name );
  			}).blur( function(){
  				var $t = $(this);
  				if( '' === $t.val() )
  					$t.addClass( name ).val( $t.data(name) );
  			});
  
  			$( '.blank-slate .input-with-default-title' ).focus();
  		},
  
  		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"]').click(function() {
  				loc.find('select').each(function() {
  					params[this.name] = $(this).val();
  				});
  				loc.find('.spinner').show();
  				$.post( ajaxurl, params, function() {
  					loc.find('.spinner').hide();
  				});
  				return false;
  			});
  		},
  
  		attachQuickSearchListeners : function() {
  			var searchTimer;
  
  			$('.quick-search').keypress(function(e){
  				var t = $(this);
  
  				if( 13 == e.which ) {
  					api.updateQuickSearchResults( t );
  					return false;
  				}
  
  				if( searchTimer ) clearTimeout(searchTimer);
  
  				searchTimer = setTimeout(function(){
  					api.updateQuickSearchResults( t );
  				}, 400);
  			}).attr('autocomplete','off');
  		},
  
  		updateQuickSearchResults : function(input) {
  			var panel, params,
  			minSearchLength = 2,
  			q = input.val();
  
  			if( q.length < minSearchLength ) return;
  
  			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).show();
  
  			$.post( ajaxurl, params, function(menuMarkup) {
  				api.processQuickSearchQueryResponse(menuMarkup, params, panel);
  			});
  		},
  
  		addCustomLink : function( processMethod ) {
  			var url = $('#custom-menu-item-url').val(),
  				label = $('#custom-menu-item-name').val();
  
  			processMethod = processMethod || api.addMenuItemToBottom;
  
  			if ( '' === url || 'http://' == url )
  				return false;
  
  			// Show the ajax spinner
  			$('.customlinkdiv .spinner').show();
  			this.addLinkToMenu( url, label, processMethod, function() {
  				// Remove the ajax spinner
  				$('.customlinkdiv .spinner').hide();
  				// Set custom link form back to defaults
  				$('#custom-menu-item-name').val('').blur();
  				$('#custom-menu-item-url').val('http://');
  			});
  		},
  
  		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 = $.trim( menuMarkup ); // 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.
  		 *
  		 * @param string menuMarkup The text server response of menu item markup.
  		 * @param object req The request arguments.
  		 */
  		addMenuItemToBottom : function( menuMarkup ) {
  			$(menuMarkup).hideAdvancedMenuItemFields().appendTo( api.targetList );
  			api.refreshKeyboardAccessibility();
  			api.refreshAdvancedAccessibility();
  		},
  
  		addMenuItemToTop : function( menuMarkup ) {
  			$(menuMarkup).hideAdvancedMenuItemFields().prependTo( api.targetList );
  			api.refreshKeyboardAccessibility();
  			api.refreshAdvancedAccessibility();
  		},
  
  		attachUnsavedChangesListener : function() {
  			$('#menu-management input, #menu-management select, #menu-management, #menu-management textarea, .menu-location-menus select').change(function(){
  				api.registerChange();
  			});
  
  			if ( 0 !== $('#menu-to-edit').length || 0 !== $('.menu-location-menus select').length ) {
  				window.onbeforeunload = function(){
  					if ( api.menusChanged )
  						return navMenuL10n.saveAlert;
  				};
  			} 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', '#' ).unbind( 'click' );
  			}
  		},
  
  		registerChange : function() {
  			api.menusChanged = true;
  		},
  
  		attachTabsPanelListeners : function() {
  			$('#menu-settings-column').bind('click', function(e) {
  				var selectAreaMatch, 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).removeAttr('checked');
  
  					$('.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).focus();
  
  					e.preventDefault();
  				} else if ( target.hasClass('select-all') ) {
  					selectAreaMatch = /#(.*)$/.exec(e.target.href);
  					if ( selectAreaMatch && selectAreaMatch[1] ) {
  						items = $('#' + selectAreaMatch[1] + ' .tabs-panel-active .menu-item-title input');
  						if( items.length === items.filter(':checked').length )
  							items.removeAttr('checked');
  						else
  							items.prop('checked', true);
  						return 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;
  				} else if ( target.hasClass('page-numbers') ) {
  					$.post( ajaxurl, e.target.href.replace(/.*\?/, '').replace(/action=([^&]*)/, '') + '&action=menu-get-metabox',
  						function( resp ) {
  							if ( -1 == resp.indexOf('replace-id') )
  								return;
  
  							var metaBoxData = $.parseJSON(resp),
  							toReplace = document.getElementById(metaBoxData['replace-id']),
  							placeholder = document.createElement('div'),
  							wrap = document.createElement('div');
  
  							if ( ! metaBoxData.markup || ! toReplace )
  								return;
  
  							wrap.innerHTML = metaBoxData.markup ? metaBoxData.markup : '';
  
  							toReplace.parentNode.insertBefore( placeholder, toReplace );
  							placeholder.parentNode.removeChild( toReplace );
  
  							placeholder.parentNode.insertBefore( wrap, placeholder );
  
  							placeholder.parentNode.removeChild( placeholder );
  
  						}
  					);
  
  					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();
  			return false;
  		},
  
  		eventOnClickMenuSave : function() {
  			var locs = '',
  			menuName = $('#menu-name'),
  			menuNameVal = menuName.val();
  			// Cancel and warn if invalid menu name
  			if( !menuNameVal || menuNameVal == menuName.attr('title') || !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( navMenuL10n.warnDeleteMenu ) ) {
  				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'),
  			$item;
  
  			if( ! $items.length ) {
  				$('.categorychecklist', panel).html( '<li><p>' + navMenuL10n.noResultsFound + '</p></li>' );
  				$('.spinner', panel).hide();
  				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).hide();
  		},
  
  		removeMenuItem : function(el) {
  			var children = el.childMenuItems();
  
  			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' );
  					}
  				});
  		},
  
  		depthToPx : function(depth) {
  			return depth * api.options.menuItemDepthPerLevel;
  		},
  
  		pxToDepth : function(px) {
  			return Math.floor(px / api.options.menuItemDepthPerLevel);
  		}
  
  	};
  
  	$(document).ready(function(){ wpNavMenu.init(); });
  
  })(jQuery);
  