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Edit File : customize-preview-nav-menus.js \| Size : 14.67 KB
/** * @output wp-includes/js/customize-preview-nav-menus.js / / global _wpCustomizePreviewNavMenusExports / /* @namespace wp.customize.navMenusPreview / wp.customize.navMenusPreview = wp.customize.MenusCustomizerPreview = ( function( $, _, wp, api ) { 'use strict'; var self = { data: { navMenuInstanceArgs: {} } }; if ( 'undefined' !== typeof _wpCustomizePreviewNavMenusExports ) { _.extend( self.data, _wpCustomizePreviewNavMenusExports ); } /* * Initialize nav menus preview. / self.init = function() { var self = this, synced = false; / * Keep track of whether we synced to determine whether or not bindSettingListener * should also initially fire the listener. This initial firing needs to wait until * after all of the settings have been synced from the pane in order to prevent * an infinite selective fallback-refresh. Note that this sync handler will be * added after the sync handler in customize-preview.js, so it will be triggered * after all of the settings are added. / api.preview.bind( 'sync', function() { synced = true; } ); if ( api.selectiveRefresh ) { // Listen for changes to settings related to nav menus. api.each( function( setting ) { self.bindSettingListener( setting ); } ); api.bind( 'add', function( setting ) { / * Handle case where an invalid nav menu item (one for which its associated object has been deleted) * is synced from the controls into the preview. Since invalid nav menu items are filtered out from * being exported to the frontend by the _is_valid_nav_menu_item filter in wp_get_nav_menu_items(), * the customizer controls will have a nav_menu_item setting where the preview will have none, and * this can trigger an infinite fallback refresh when the nav menu item lacks any valid items. / if ( setting.get() && ! setting.get()._invalid ) { self.bindSettingListener( setting, { fire: synced } ); } } ); api.bind( 'remove', function( setting ) { self.unbindSettingListener( setting ); } ); / * Ensure that wp_nav_menu() instances nested inside of other partials * will be recognized as being present on the page. / api.selectiveRefresh.bind( 'render-partials-response', function( response ) { if ( response.nav_menu_instance_args ) { _.extend( self.data.navMenuInstanceArgs, response.nav_menu_instance_args ); } } ); } api.preview.bind( 'active', function() { self.highlightControls(); } ); }; if ( api.selectiveRefresh ) { /* * Partial representing an invocation of wp_nav_menu(). * * @memberOf wp.customize.navMenusPreview * @alias wp.customize.navMenusPreview.NavMenuInstancePartial * * @class * @augments wp.customize.selectiveRefresh.Partial * @since 4.5.0 / self.NavMenuInstancePartial = api.selectiveRefresh.Partial.extend(/* @lends wp.customize.navMenusPreview.NavMenuInstancePartial.prototype /{ /* * Constructor. * * @since 4.5.0 * @param {string} id - Partial ID. * @param {Object} options * @param {Object} options.params * @param {Object} options.params.navMenuArgs * @param {string} options.params.navMenuArgs.args_hmac * @param {string} [options.params.navMenuArgs.theme_location] * @param {number} [options.params.navMenuArgs.menu] * @param {Object} [options.constructingContainerContext] / initialize: function( id, options ) { var partial = this, matches, argsHmac; matches = id.match( /^nav_menu_instance\[([0-9a-f]{32})]$/ ); if ( ! matches ) { throw new Error( 'Illegal id for nav_menu_instance partial. The key corresponds with the args HMAC.' ); } argsHmac = matches[1]; options = options \|\| {}; options.params = _.extend( { selector: '[data-customize-partial-id="' + id + '"]', navMenuArgs: options.constructingContainerContext \|\| {}, containerInclusive: true }, options.params \|\| {} ); api.selectiveRefresh.Partial.prototype.initialize.call( partial, id, options ); if ( ! _.isObject( partial.params.navMenuArgs ) ) { throw new Error( 'Missing navMenuArgs' ); } if ( partial.params.navMenuArgs.args_hmac !== argsHmac ) { throw new Error( 'args_hmac mismatch with id' ); } }, /* * Return whether the setting is related to this partial. * * @since 4.5.0 * @param {wp.customize.Value\|string} setting - Object or ID. * @param {number\|Object\|false\|null} newValue - New value, or null if the setting was just removed. * @param {number\|Object\|false\|null} oldValue - Old value, or null if the setting was just added. * @return {boolean} / isRelatedSetting: function( setting, newValue, oldValue ) { var partial = this, navMenuLocationSetting, navMenuId, isNavMenuItemSetting, _newValue, _oldValue, urlParser; if ( _.isString( setting ) ) { setting = api( setting ); } / * Prevent nav_menu_item changes only containing type_label differences triggering a refresh. * These settings in the preview do not include type_label property, and so if one of these * nav_menu_item settings is dirty, after a refresh the nav menu instance would do a selective * refresh immediately because the setting from the pane would have the type_label whereas * the setting in the preview would not, thus triggering a change event. The following * condition short-circuits this unnecessary selective refresh and also prevents an infinite * loop in the case where a nav_menu_instance partial had done a fallback refresh. * @todo Nav menu item settings should not include a type_label property to begin with. / isNavMenuItemSetting = /^nav_menu_item\[/.test( setting.id ); if ( isNavMenuItemSetting && _.isObject( newValue ) && _.isObject( oldValue ) ) { _newValue = _.clone( newValue ); _oldValue = _.clone( oldValue ); delete _newValue.type_label; delete _oldValue.type_label; // Normalize URL scheme when parent frame is HTTPS to prevent selective refresh upon initial page load. if ( 'https' === api.preview.scheme.get() ) { urlParser = document.createElement( 'a' ); urlParser.href = _newValue.url; urlParser.protocol = 'https:'; _newValue.url = urlParser.href; urlParser.href = _oldValue.url; urlParser.protocol = 'https:'; _oldValue.url = urlParser.href; } // Prevent original_title differences from causing refreshes if title is present. if ( newValue.title ) { delete _oldValue.original_title; delete _newValue.original_title; } if ( _.isEqual( _oldValue, _newValue ) ) { return false; } } if ( partial.params.navMenuArgs.theme_location ) { if ( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' === setting.id ) { return true; } navMenuLocationSetting = api( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' ); } navMenuId = partial.params.navMenuArgs.menu; if ( ! navMenuId && navMenuLocationSetting ) { navMenuId = navMenuLocationSetting(); } if ( ! navMenuId ) { return false; } return ( ( 'nav_menu[' + navMenuId + ']' === setting.id ) \|\| ( isNavMenuItemSetting && ( ( newValue && newValue.nav_menu_term_id === navMenuId ) \|\| ( oldValue && oldValue.nav_menu_term_id === navMenuId ) ) ) ); }, /* * Make sure that partial fallback behavior is invoked if there is no associated menu. * * @since 4.5.0 * * @return {Promise} / refresh: function() { var partial = this, menuId, deferred = $.Deferred(); // Make sure the fallback behavior is invoked when the partial is no longer associated with a menu. if ( _.isNumber( partial.params.navMenuArgs.menu ) ) { menuId = partial.params.navMenuArgs.menu; } else if ( partial.params.navMenuArgs.theme_location && api.has( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' ) ) { menuId = api( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' ).get(); } if ( ! menuId ) { partial.fallback(); deferred.reject(); return deferred.promise(); } return api.selectiveRefresh.Partial.prototype.refresh.call( partial ); }, /* * Render content. * * @inheritdoc * @param {wp.customize.selectiveRefresh.Placement} placement / renderContent: function( placement ) { var partial = this, previousContainer = placement.container; // Do fallback behavior to refresh preview if menu is now empty. if ( '' === placement.addedContent ) { placement.partial.fallback(); } if ( api.selectiveRefresh.Partial.prototype.renderContent.call( partial, placement ) ) { // Trigger deprecated event. $( document ).trigger( 'customize-preview-menu-refreshed', [ { instanceNumber: null, // @deprecated wpNavArgs: placement.context, // @deprecated wpNavMenuArgs: placement.context, oldContainer: previousContainer, newContainer: placement.container } ] ); } } }); api.selectiveRefresh.partialConstructor.nav_menu_instance = self.NavMenuInstancePartial; /* * Request full refresh if there are nav menu instances that lack partials which also match the supplied args. * * @param {Object} navMenuInstanceArgs / self.handleUnplacedNavMenuInstances = function( navMenuInstanceArgs ) { var unplacedNavMenuInstances; unplacedNavMenuInstances = _.filter( _.values( self.data.navMenuInstanceArgs ), function( args ) { return ! api.selectiveRefresh.partial.has( 'nav_menu_instance[' + args.args_hmac + ']' ); } ); if ( _.findWhere( unplacedNavMenuInstances, navMenuInstanceArgs ) ) { api.selectiveRefresh.requestFullRefresh(); return true; } return false; }; /* * Add change listener for a nav_menu[], nav_menu_item[], or nav_menu_locations[] setting. * * @since 4.5.0 * * @param {wp.customize.Value} setting * @param {Object} [options] * @param {boolean} options.fire Whether to invoke the callback after binding. * This is used when a dynamic setting is added. * @return {boolean} Whether the setting was bound. / self.bindSettingListener = function( setting, options ) { var matches; options = options \|\| {}; matches = setting.id.match( /^nav_menu\[(-?\d+)]$/ ); if ( matches ) { setting._navMenuId = parseInt( matches[1], 10 ); setting.bind( this.onChangeNavMenuSetting ); if ( options.fire ) { this.onChangeNavMenuSetting.call( setting, setting(), false ); } return true; } matches = setting.id.match( /^nav_menu_item\[(-?\d+)]$/ ); if ( matches ) { setting._navMenuItemId = parseInt( matches[1], 10 ); setting.bind( this.onChangeNavMenuItemSetting ); if ( options.fire ) { this.onChangeNavMenuItemSetting.call( setting, setting(), false ); } return true; } matches = setting.id.match( /^nav_menu_locations\[(.+?)]/ ); if ( matches ) { setting._navMenuThemeLocation = matches[1]; setting.bind( this.onChangeNavMenuLocationsSetting ); if ( options.fire ) { this.onChangeNavMenuLocationsSetting.call( setting, setting(), false ); } return true; } return false; }; /* * Remove change listeners for nav_menu[], nav_menu_item[], or nav_menu_locations[] setting. * * @since 4.5.0 * * @param {wp.customize.Value} setting / self.unbindSettingListener = function( setting ) { setting.unbind( this.onChangeNavMenuSetting ); setting.unbind( this.onChangeNavMenuItemSetting ); setting.unbind( this.onChangeNavMenuLocationsSetting ); }; /* * Handle change for nav_menu[] setting for nav menu instances lacking partials. * * @since 4.5.0 * * @this {wp.customize.Value} / self.onChangeNavMenuSetting = function() { var setting = this; self.handleUnplacedNavMenuInstances( { menu: setting._navMenuId } ); // Ensure all nav menu instances with a theme_location assigned to this menu are handled. api.each( function( otherSetting ) { if ( ! otherSetting._navMenuThemeLocation ) { return; } if ( setting._navMenuId === otherSetting() ) { self.handleUnplacedNavMenuInstances( { theme_location: otherSetting._navMenuThemeLocation } ); } } ); }; /* * Handle change for nav_menu_item[] setting for nav menu instances lacking partials. * * @since 4.5.0 * * @param {Object} newItem New value for nav_menu_item[] setting. * @param {Object} oldItem Old value for nav_menu_item[] setting. * @this {wp.customize.Value} / self.onChangeNavMenuItemSetting = function( newItem, oldItem ) { var item = newItem \|\| oldItem, navMenuSetting; navMenuSetting = api( 'nav_menu[' + String( item.nav_menu_term_id ) + ']' ); if ( navMenuSetting ) { self.onChangeNavMenuSetting.call( navMenuSetting ); } }; /* * Handle change for nav_menu_locations[] setting for nav menu instances lacking partials. * * @since 4.5.0 * * @this {wp.customize.Value} / self.onChangeNavMenuLocationsSetting = function() { var setting = this, hasNavMenuInstance; self.handleUnplacedNavMenuInstances( { theme_location: setting._navMenuThemeLocation } ); // If there are no wp_nav_menu() instances that refer to the theme location, do full refresh. hasNavMenuInstance = !! _.findWhere( _.values( self.data.navMenuInstanceArgs ), { theme_location: setting._navMenuThemeLocation } ); if ( ! hasNavMenuInstance ) { api.selectiveRefresh.requestFullRefresh(); } }; } /* * Connect nav menu items with their corresponding controls in the pane. * * Setup shift-click on nav menu items which are more granular than the nav menu partial itself. * Also this applies even if a nav menu is not partial-refreshable. * * @since 4.5.0 */ self.highlightControls = function() { var selector = '.menu-item'; // Skip adding highlights if not in the customizer preview iframe. if ( ! api.settings.channel ) { return; } // Focus on the menu item control when shift+clicking the menu item. $( document ).on( 'click', selector, function( e ) { var navMenuItemParts; if ( ! e.shiftKey ) { return; } navMenuItemParts = $( this ).attr( 'class' ).match( /(?:^\|\s)menu-item-(-?\d+)(?:\s\|$)/ ); if ( navMenuItemParts ) { e.preventDefault(); e.stopPropagation(); // Make sure a sub-nav menu item will get focused instead of parent items. api.preview.send( 'focus-nav-menu-item-control', parseInt( navMenuItemParts[1], 10 ) ); } }); }; api.bind( 'preview-ready', function() { self.init(); } ); return self; }( jQuery, _, wp, wp.customize ) ); Back

Edit File : customize-preview-nav-menus.js | Size : 14.67 KB

/**
 * @output wp-includes/js/customize-preview-nav-menus.js
 */

/* global _wpCustomizePreviewNavMenusExports */

/** @namespace wp.customize.navMenusPreview */
wp.customize.navMenusPreview = wp.customize.MenusCustomizerPreview = ( function( $, _, wp, api ) {
	'use strict';

var self = {
		data: {
			navMenuInstanceArgs: {}
		}
	};
	if ( 'undefined' !== typeof _wpCustomizePreviewNavMenusExports ) {
		_.extend( self.data, _wpCustomizePreviewNavMenusExports );
	}

/**
	 * Initialize nav menus preview.
	 */
	self.init = function() {
		var self = this, synced = false;

/*
		 * Keep track of whether we synced to determine whether or not bindSettingListener
		 * should also initially fire the listener. This initial firing needs to wait until
		 * after all of the settings have been synced from the pane in order to prevent
		 * an infinite selective fallback-refresh. Note that this sync handler will be
		 * added after the sync handler in customize-preview.js, so it will be triggered
		 * after all of the settings are added.
		 */
		api.preview.bind( 'sync', function() {
			synced = true;
		} );

if ( api.selectiveRefresh ) {
			// Listen for changes to settings related to nav menus.
			api.each( function( setting ) {
				self.bindSettingListener( setting );
			} );
			api.bind( 'add', function( setting ) {

/*
				 * Handle case where an invalid nav menu item (one for which its associated object has been deleted)
				 * is synced from the controls into the preview. Since invalid nav menu items are filtered out from
				 * being exported to the frontend by the _is_valid_nav_menu_item filter in wp_get_nav_menu_items(),
				 * the customizer controls will have a nav_menu_item setting where the preview will have none, and
				 * this can trigger an infinite fallback refresh when the nav menu item lacks any valid items.
				 */
				if ( setting.get() && ! setting.get()._invalid ) {
					self.bindSettingListener( setting, { fire: synced } );
				}
			} );
			api.bind( 'remove', function( setting ) {
				self.unbindSettingListener( setting );
			} );

/*
			 * Ensure that wp_nav_menu() instances nested inside of other partials
			 * will be recognized as being present on the page.
			 */
			api.selectiveRefresh.bind( 'render-partials-response', function( response ) {
				if ( response.nav_menu_instance_args ) {
					_.extend( self.data.navMenuInstanceArgs, response.nav_menu_instance_args );
				}
			} );
		}

api.preview.bind( 'active', function() {
			self.highlightControls();
		} );
	};

if ( api.selectiveRefresh ) {

/**
		 * Partial representing an invocation of wp_nav_menu().
		 *
		 * @memberOf wp.customize.navMenusPreview
		 * @alias wp.customize.navMenusPreview.NavMenuInstancePartial
		 *
		 * @class
		 * @augments wp.customize.selectiveRefresh.Partial
		 * @since 4.5.0
		 */
		self.NavMenuInstancePartial = api.selectiveRefresh.Partial.extend(/** @lends wp.customize.navMenusPreview.NavMenuInstancePartial.prototype */{

/**
			 * Constructor.
			 *
			 * @since 4.5.0
			 * @param {string} id - Partial ID.
			 * @param {Object} options
			 * @param {Object} options.params
			 * @param {Object} options.params.navMenuArgs
			 * @param {string} options.params.navMenuArgs.args_hmac
			 * @param {string} [options.params.navMenuArgs.theme_location]
			 * @param {number} [options.params.navMenuArgs.menu]
			 * @param {Object} [options.constructingContainerContext]
			 */
			initialize: function( id, options ) {
				var partial = this, matches, argsHmac;
				matches = id.match( /^nav_menu_instance\[([0-9a-f]{32})]$/ );
				if ( ! matches ) {
					throw new Error( 'Illegal id for nav_menu_instance partial. The key corresponds with the args HMAC.' );
				}
				argsHmac = matches[1];

options = options || {};
				options.params = _.extend(
					{
						selector: '[data-customize-partial-id="' + id + '"]',
						navMenuArgs: options.constructingContainerContext || {},
						containerInclusive: true
					},
					options.params || {}
				);
				api.selectiveRefresh.Partial.prototype.initialize.call( partial, id, options );

if ( ! _.isObject( partial.params.navMenuArgs ) ) {
					throw new Error( 'Missing navMenuArgs' );
				}
				if ( partial.params.navMenuArgs.args_hmac !== argsHmac ) {
					throw new Error( 'args_hmac mismatch with id' );
				}
			},

/**
			 * Return whether the setting is related to this partial.
			 *
			 * @since 4.5.0
			 * @param {wp.customize.Value|string} setting  - Object or ID.
			 * @param {number|Object|false|null}  newValue - New value, or null if the setting was just removed.
			 * @param {number|Object|false|null}  oldValue - Old value, or null if the setting was just added.
			 * @return {boolean}
			 */
			isRelatedSetting: function( setting, newValue, oldValue ) {
				var partial = this, navMenuLocationSetting, navMenuId, isNavMenuItemSetting, _newValue, _oldValue, urlParser;
				if ( _.isString( setting ) ) {
					setting = api( setting );
				}

/*
				 * Prevent nav_menu_item changes only containing type_label differences triggering a refresh.
				 * These settings in the preview do not include type_label property, and so if one of these
				 * nav_menu_item settings is dirty, after a refresh the nav menu instance would do a selective
				 * refresh immediately because the setting from the pane would have the type_label whereas
				 * the setting in the preview would not, thus triggering a change event. The following
				 * condition short-circuits this unnecessary selective refresh and also prevents an infinite
				 * loop in the case where a nav_menu_instance partial had done a fallback refresh.
				 * @todo Nav menu item settings should not include a type_label property to begin with.
				 */
				isNavMenuItemSetting = /^nav_menu_item\[/.test( setting.id );
				if ( isNavMenuItemSetting && _.isObject( newValue ) && _.isObject( oldValue ) ) {
					_newValue = _.clone( newValue );
					_oldValue = _.clone( oldValue );
					delete _newValue.type_label;
					delete _oldValue.type_label;

// Normalize URL scheme when parent frame is HTTPS to prevent selective refresh upon initial page load.
					if ( 'https' === api.preview.scheme.get() ) {
						urlParser = document.createElement( 'a' );
						urlParser.href = _newValue.url;
						urlParser.protocol = 'https:';
						_newValue.url = urlParser.href;
						urlParser.href = _oldValue.url;
						urlParser.protocol = 'https:';
						_oldValue.url = urlParser.href;
					}

// Prevent original_title differences from causing refreshes if title is present.
					if ( newValue.title ) {
						delete _oldValue.original_title;
						delete _newValue.original_title;
					}

if ( _.isEqual( _oldValue, _newValue ) ) {
						return false;
					}
				}

if ( partial.params.navMenuArgs.theme_location ) {
					if ( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' === setting.id ) {
						return true;
					}
					navMenuLocationSetting = api( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' );
				}

navMenuId = partial.params.navMenuArgs.menu;
				if ( ! navMenuId && navMenuLocationSetting ) {
					navMenuId = navMenuLocationSetting();
				}

if ( ! navMenuId ) {
					return false;
				}
				return (
					( 'nav_menu[' + navMenuId + ']' === setting.id ) ||
					( isNavMenuItemSetting && (
						( newValue && newValue.nav_menu_term_id === navMenuId ) ||
						( oldValue && oldValue.nav_menu_term_id === navMenuId )
					) )
				);
			},

/**
			 * Make sure that partial fallback behavior is invoked if there is no associated menu.
			 *
			 * @since 4.5.0
			 *
			 * @return {Promise}
			 */
			refresh: function() {
				var partial = this, menuId, deferred = $.Deferred();

// Make sure the fallback behavior is invoked when the partial is no longer associated with a menu.
				if ( _.isNumber( partial.params.navMenuArgs.menu ) ) {
					menuId = partial.params.navMenuArgs.menu;
				} else if ( partial.params.navMenuArgs.theme_location && api.has( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' ) ) {
					menuId = api( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' ).get();
				}
				if ( ! menuId ) {
					partial.fallback();
					deferred.reject();
					return deferred.promise();
				}

return api.selectiveRefresh.Partial.prototype.refresh.call( partial );
			},

/**
			 * Render content.
			 *
			 * @inheritdoc
			 * @param {wp.customize.selectiveRefresh.Placement} placement
			 */
			renderContent: function( placement ) {
				var partial = this, previousContainer = placement.container;

// Do fallback behavior to refresh preview if menu is now empty.
				if ( '' === placement.addedContent ) {
					placement.partial.fallback();
				}

if ( api.selectiveRefresh.Partial.prototype.renderContent.call( partial, placement ) ) {

// Trigger deprecated event.
					$( document ).trigger( 'customize-preview-menu-refreshed', [ {
						instanceNumber: null, // @deprecated
						wpNavArgs: placement.context, // @deprecated
						wpNavMenuArgs: placement.context,
						oldContainer: previousContainer,
						newContainer: placement.container
					} ] );
				}
			}
		});

api.selectiveRefresh.partialConstructor.nav_menu_instance = self.NavMenuInstancePartial;

/**
		 * Request full refresh if there are nav menu instances that lack partials which also match the supplied args.
		 *
		 * @param {Object} navMenuInstanceArgs
		 */
		self.handleUnplacedNavMenuInstances = function( navMenuInstanceArgs ) {
			var unplacedNavMenuInstances;
			unplacedNavMenuInstances = _.filter( _.values( self.data.navMenuInstanceArgs ), function( args ) {
				return ! api.selectiveRefresh.partial.has( 'nav_menu_instance[' + args.args_hmac + ']' );
			} );
			if ( _.findWhere( unplacedNavMenuInstances, navMenuInstanceArgs ) ) {
				api.selectiveRefresh.requestFullRefresh();
				return true;
			}
			return false;
		};

/**
		 * Add change listener for a nav_menu[], nav_menu_item[], or nav_menu_locations[] setting.
		 *
		 * @since 4.5.0
		 *
		 * @param {wp.customize.Value} setting
		 * @param {Object}             [options]
		 * @param {boolean}            options.fire Whether to invoke the callback after binding.
		 *                                          This is used when a dynamic setting is added.
		 * @return {boolean} Whether the setting was bound.
		 */
		self.bindSettingListener = function( setting, options ) {
			var matches;
			options = options || {};

matches = setting.id.match( /^nav_menu\[(-?\d+)]$/ );
			if ( matches ) {
				setting._navMenuId = parseInt( matches[1], 10 );
				setting.bind( this.onChangeNavMenuSetting );
				if ( options.fire ) {
					this.onChangeNavMenuSetting.call( setting, setting(), false );
				}
				return true;
			}

matches = setting.id.match( /^nav_menu_item\[(-?\d+)]$/ );
			if ( matches ) {
				setting._navMenuItemId = parseInt( matches[1], 10 );
				setting.bind( this.onChangeNavMenuItemSetting );
				if ( options.fire ) {
					this.onChangeNavMenuItemSetting.call( setting, setting(), false );
				}
				return true;
			}

matches = setting.id.match( /^nav_menu_locations\[(.+?)]/ );
			if ( matches ) {
				setting._navMenuThemeLocation = matches[1];
				setting.bind( this.onChangeNavMenuLocationsSetting );
				if ( options.fire ) {
					this.onChangeNavMenuLocationsSetting.call( setting, setting(), false );
				}
				return true;
			}

return false;
		};

/**
		 * Remove change listeners for nav_menu[], nav_menu_item[], or nav_menu_locations[] setting.
		 *
		 * @since 4.5.0
		 *
		 * @param {wp.customize.Value} setting
		 */
		self.unbindSettingListener = function( setting ) {
			setting.unbind( this.onChangeNavMenuSetting );
			setting.unbind( this.onChangeNavMenuItemSetting );
			setting.unbind( this.onChangeNavMenuLocationsSetting );
		};

/**
		 * Handle change for nav_menu[] setting for nav menu instances lacking partials.
		 *
		 * @since 4.5.0
		 *
		 * @this {wp.customize.Value}
		 */
		self.onChangeNavMenuSetting = function() {
			var setting = this;

self.handleUnplacedNavMenuInstances( {
				menu: setting._navMenuId
			} );

// Ensure all nav menu instances with a theme_location assigned to this menu are handled.
			api.each( function( otherSetting ) {
				if ( ! otherSetting._navMenuThemeLocation ) {
					return;
				}
				if ( setting._navMenuId === otherSetting() ) {
					self.handleUnplacedNavMenuInstances( {
						theme_location: otherSetting._navMenuThemeLocation
					} );
				}
			} );
		};

/**
		 * Handle change for nav_menu_item[] setting for nav menu instances lacking partials.
		 *
		 * @since 4.5.0
		 *
		 * @param {Object} newItem New value for nav_menu_item[] setting.
		 * @param {Object} oldItem Old value for nav_menu_item[] setting.
		 * @this {wp.customize.Value}
		 */
		self.onChangeNavMenuItemSetting = function( newItem, oldItem ) {
			var item = newItem || oldItem, navMenuSetting;
			navMenuSetting = api( 'nav_menu[' + String( item.nav_menu_term_id ) + ']' );
			if ( navMenuSetting ) {
				self.onChangeNavMenuSetting.call( navMenuSetting );
			}
		};

/**
		 * Handle change for nav_menu_locations[] setting for nav menu instances lacking partials.
		 *
		 * @since 4.5.0
		 *
		 * @this {wp.customize.Value}
		 */
		self.onChangeNavMenuLocationsSetting = function() {
			var setting = this, hasNavMenuInstance;
			self.handleUnplacedNavMenuInstances( {
				theme_location: setting._navMenuThemeLocation
			} );

// If there are no wp_nav_menu() instances that refer to the theme location, do full refresh.
			hasNavMenuInstance = !! _.findWhere( _.values( self.data.navMenuInstanceArgs ), {
				theme_location: setting._navMenuThemeLocation
			} );
			if ( ! hasNavMenuInstance ) {
				api.selectiveRefresh.requestFullRefresh();
			}
		};
	}

/**
	 * Connect nav menu items with their corresponding controls in the pane.
	 *
	 * Setup shift-click on nav menu items which are more granular than the nav menu partial itself.
	 * Also this applies even if a nav menu is not partial-refreshable.
	 *
	 * @since 4.5.0
	 */
	self.highlightControls = function() {
		var selector = '.menu-item';

// Skip adding highlights if not in the customizer preview iframe.
		if ( ! api.settings.channel ) {
			return;
		}

// Focus on the menu item control when shift+clicking the menu item.
		$( document ).on( 'click', selector, function( e ) {
			var navMenuItemParts;
			if ( ! e.shiftKey ) {
				return;
			}

navMenuItemParts = $( this ).attr( 'class' ).match( /(?:^|\s)menu-item-(-?\d+)(?:\s|$)/ );
			if ( navMenuItemParts ) {
				e.preventDefault();
				e.stopPropagation(); // Make sure a sub-nav menu item will get focused instead of parent items.
				api.preview.send( 'focus-nav-menu-item-control', parseInt( navMenuItemParts[1], 10 ) );
			}
		});
	};

api.bind( 'preview-ready', function() {
		self.init();
	} );

return self;

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

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