/**

 * 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;