wp/wp-includes/class-wp-customize-nav-menus.php
changeset 7 cf61fcea0001
child 9 177826044cd9
equal deleted inserted replaced
6:490d5cc509ed 7:cf61fcea0001
       
     1 <?php
       
     2 /**
       
     3  * WordPress Customize Nav Menus classes
       
     4  *
       
     5  * @package WordPress
       
     6  * @subpackage Customize
       
     7  * @since 4.3.0
       
     8  */
       
     9 
       
    10 /**
       
    11  * Customize Nav Menus class.
       
    12  *
       
    13  * Implements menu management in the Customizer.
       
    14  *
       
    15  * @since 4.3.0
       
    16  *
       
    17  * @see WP_Customize_Manager
       
    18  */
       
    19 final class WP_Customize_Nav_Menus {
       
    20 
       
    21 	/**
       
    22 	 * WP_Customize_Manager instance.
       
    23 	 *
       
    24 	 * @since 4.3.0
       
    25 	 * @var WP_Customize_Manager
       
    26 	 */
       
    27 	public $manager;
       
    28 
       
    29 	/**
       
    30 	 * Original nav menu locations before the theme was switched.
       
    31 	 *
       
    32 	 * @since 4.9.0
       
    33 	 * @var array
       
    34 	 */
       
    35 	protected $original_nav_menu_locations;
       
    36 
       
    37 	/**
       
    38 	 * Constructor.
       
    39 	 *
       
    40 	 * @since 4.3.0
       
    41 	 *
       
    42 	 * @param object $manager An instance of the WP_Customize_Manager class.
       
    43 	 */
       
    44 	public function __construct( $manager ) {
       
    45 		$this->manager = $manager;
       
    46 		$this->original_nav_menu_locations = get_nav_menu_locations();
       
    47 
       
    48 		// See https://github.com/xwp/wp-customize-snapshots/blob/962586659688a5b1fd9ae93618b7ce2d4e7a421c/php/class-customize-snapshot-manager.php#L469-L499
       
    49 		add_action( 'customize_register', array( $this, 'customize_register' ), 11 );
       
    50 		add_filter( 'customize_dynamic_setting_args', array( $this, 'filter_dynamic_setting_args' ), 10, 2 );
       
    51 		add_filter( 'customize_dynamic_setting_class', array( $this, 'filter_dynamic_setting_class' ), 10, 3 );
       
    52 		add_action( 'customize_save_nav_menus_created_posts', array( $this, 'save_nav_menus_created_posts' ) );
       
    53 
       
    54 		// Skip remaining hooks when the user can't manage nav menus anyway.
       
    55 		if ( ! current_user_can( 'edit_theme_options' ) ) {
       
    56 			return;
       
    57 		}
       
    58 
       
    59 		add_filter( 'customize_refresh_nonces', array( $this, 'filter_nonces' ) );
       
    60 		add_action( 'wp_ajax_load-available-menu-items-customizer', array( $this, 'ajax_load_available_items' ) );
       
    61 		add_action( 'wp_ajax_search-available-menu-items-customizer', array( $this, 'ajax_search_available_items' ) );
       
    62 		add_action( 'wp_ajax_customize-nav-menus-insert-auto-draft', array( $this, 'ajax_insert_auto_draft_post' ) );
       
    63 		add_action( 'customize_controls_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
       
    64 		add_action( 'customize_controls_print_footer_scripts', array( $this, 'print_templates' ) );
       
    65 		add_action( 'customize_controls_print_footer_scripts', array( $this, 'available_items_template' ) );
       
    66 		add_action( 'customize_preview_init', array( $this, 'customize_preview_init' ) );
       
    67 		add_action( 'customize_preview_init', array( $this, 'make_auto_draft_status_previewable' ) );
       
    68 
       
    69 		// Selective Refresh partials.
       
    70 		add_filter( 'customize_dynamic_partial_args', array( $this, 'customize_dynamic_partial_args' ), 10, 2 );
       
    71 	}
       
    72 
       
    73 	/**
       
    74 	 * Adds a nonce for customizing menus.
       
    75 	 *
       
    76 	 * @since 4.5.0
       
    77 	 *
       
    78 	 * @param array $nonces Array of nonces.
       
    79 	 * @return array $nonces Modified array of nonces.
       
    80 	 */
       
    81 	public function filter_nonces( $nonces ) {
       
    82 		$nonces['customize-menus'] = wp_create_nonce( 'customize-menus' );
       
    83 		return $nonces;
       
    84 	}
       
    85 
       
    86 	/**
       
    87 	 * Ajax handler for loading available menu items.
       
    88 	 *
       
    89 	 * @since 4.3.0
       
    90 	 */
       
    91 	public function ajax_load_available_items() {
       
    92 		check_ajax_referer( 'customize-menus', 'customize-menus-nonce' );
       
    93 
       
    94 		if ( ! current_user_can( 'edit_theme_options' ) ) {
       
    95 			wp_die( -1 );
       
    96 		}
       
    97 
       
    98 		$all_items = array();
       
    99 		$item_types = array();
       
   100 		if ( isset( $_POST['item_types'] ) && is_array( $_POST['item_types'] ) ) {
       
   101 			$item_types = wp_unslash( $_POST['item_types'] );
       
   102 		} elseif ( isset( $_POST['type'] ) && isset( $_POST['object'] ) ) { // Back compat.
       
   103 			$item_types[] = array(
       
   104 				'type' => wp_unslash( $_POST['type'] ),
       
   105 				'object' => wp_unslash( $_POST['object'] ),
       
   106 				'page' => empty( $_POST['page'] ) ? 0 : absint( $_POST['page'] ),
       
   107 			);
       
   108 		} else {
       
   109 			wp_send_json_error( 'nav_menus_missing_type_or_object_parameter' );
       
   110 		}
       
   111 
       
   112 		foreach ( $item_types as $item_type ) {
       
   113 			if ( empty( $item_type['type'] ) || empty( $item_type['object'] ) ) {
       
   114 				wp_send_json_error( 'nav_menus_missing_type_or_object_parameter' );
       
   115 			}
       
   116 			$type = sanitize_key( $item_type['type'] );
       
   117 			$object = sanitize_key( $item_type['object'] );
       
   118 			$page = empty( $item_type['page'] ) ? 0 : absint( $item_type['page'] );
       
   119 			$items = $this->load_available_items_query( $type, $object, $page );
       
   120 			if ( is_wp_error( $items ) ) {
       
   121 				wp_send_json_error( $items->get_error_code() );
       
   122 			}
       
   123 			$all_items[ $item_type['type'] . ':' . $item_type['object'] ] = $items;
       
   124 		}
       
   125 
       
   126 		wp_send_json_success( array( 'items' => $all_items ) );
       
   127 	}
       
   128 
       
   129 	/**
       
   130 	 * Performs the post_type and taxonomy queries for loading available menu items.
       
   131 	 *
       
   132 	 * @since 4.3.0
       
   133 	 *
       
   134 	 * @param string $type   Optional. Accepts any custom object type and has built-in support for
       
   135 	 *                         'post_type' and 'taxonomy'. Default is 'post_type'.
       
   136 	 * @param string $object Optional. Accepts any registered taxonomy or post type name. Default is 'page'.
       
   137 	 * @param int    $page   Optional. The page number used to generate the query offset. Default is '0'.
       
   138 	 * @return WP_Error|array Returns either a WP_Error object or an array of menu items.
       
   139 	 */
       
   140 	public function load_available_items_query( $type = 'post_type', $object = 'page', $page = 0 ) {
       
   141 		$items = array();
       
   142 
       
   143 		if ( 'post_type' === $type ) {
       
   144 			$post_type = get_post_type_object( $object );
       
   145 			if ( ! $post_type ) {
       
   146 				return new WP_Error( 'nav_menus_invalid_post_type' );
       
   147 			}
       
   148 
       
   149 			if ( 0 === $page && 'page' === $object ) {
       
   150 				// Add "Home" link. Treat as a page, but switch to custom on add.
       
   151 				$items[] = array(
       
   152 					'id'         => 'home',
       
   153 					'title'      => _x( 'Home', 'nav menu home label' ),
       
   154 					'type'       => 'custom',
       
   155 					'type_label' => __( 'Custom Link' ),
       
   156 					'object'     => '',
       
   157 					'url'        => home_url(),
       
   158 				);
       
   159 			} elseif ( 'post' !== $object && 0 === $page && $post_type->has_archive ) {
       
   160 				// Add a post type archive link.
       
   161 				$items[] = array(
       
   162 					'id'         => $object . '-archive',
       
   163 					'title'      => $post_type->labels->archives,
       
   164 					'type'       => 'post_type_archive',
       
   165 					'type_label' => __( 'Post Type Archive' ),
       
   166 					'object'     => $object,
       
   167 					'url'        => get_post_type_archive_link( $object ),
       
   168 				);
       
   169 			}
       
   170 
       
   171 			// Prepend posts with nav_menus_created_posts on first page.
       
   172 			$posts = array();
       
   173 			if ( 0 === $page && $this->manager->get_setting( 'nav_menus_created_posts' ) ) {
       
   174 				foreach ( $this->manager->get_setting( 'nav_menus_created_posts' )->value() as $post_id ) {
       
   175 					$auto_draft_post = get_post( $post_id );
       
   176 					if ( $post_type->name === $auto_draft_post->post_type ) {
       
   177 						$posts[] = $auto_draft_post;
       
   178 					}
       
   179 				}
       
   180 			}
       
   181 
       
   182 			$posts = array_merge( $posts, get_posts( array(
       
   183 				'numberposts' => 10,
       
   184 				'offset'      => 10 * $page,
       
   185 				'orderby'     => 'date',
       
   186 				'order'       => 'DESC',
       
   187 				'post_type'   => $object,
       
   188 			) ) );
       
   189 
       
   190 			foreach ( $posts as $post ) {
       
   191 				$post_title = $post->post_title;
       
   192 				if ( '' === $post_title ) {
       
   193 					/* translators: %d: ID of a post */
       
   194 					$post_title = sprintf( __( '#%d (no title)' ), $post->ID );
       
   195 				}
       
   196 				$items[] = array(
       
   197 					'id'         => "post-{$post->ID}",
       
   198 					'title'      => html_entity_decode( $post_title, ENT_QUOTES, get_bloginfo( 'charset' ) ),
       
   199 					'type'       => 'post_type',
       
   200 					'type_label' => get_post_type_object( $post->post_type )->labels->singular_name,
       
   201 					'object'     => $post->post_type,
       
   202 					'object_id'  => intval( $post->ID ),
       
   203 					'url'        => get_permalink( intval( $post->ID ) ),
       
   204 				);
       
   205 			}
       
   206 		} elseif ( 'taxonomy' === $type ) {
       
   207 			$terms = get_terms( $object, array(
       
   208 				'child_of'     => 0,
       
   209 				'exclude'      => '',
       
   210 				'hide_empty'   => false,
       
   211 				'hierarchical' => 1,
       
   212 				'include'      => '',
       
   213 				'number'       => 10,
       
   214 				'offset'       => 10 * $page,
       
   215 				'order'        => 'DESC',
       
   216 				'orderby'      => 'count',
       
   217 				'pad_counts'   => false,
       
   218 			) );
       
   219 			if ( is_wp_error( $terms ) ) {
       
   220 				return $terms;
       
   221 			}
       
   222 
       
   223 			foreach ( $terms as $term ) {
       
   224 				$items[] = array(
       
   225 					'id'         => "term-{$term->term_id}",
       
   226 					'title'      => html_entity_decode( $term->name, ENT_QUOTES, get_bloginfo( 'charset' ) ),
       
   227 					'type'       => 'taxonomy',
       
   228 					'type_label' => get_taxonomy( $term->taxonomy )->labels->singular_name,
       
   229 					'object'     => $term->taxonomy,
       
   230 					'object_id'  => intval( $term->term_id ),
       
   231 					'url'        => get_term_link( intval( $term->term_id ), $term->taxonomy ),
       
   232 				);
       
   233 			}
       
   234 		}
       
   235 
       
   236 		/**
       
   237 		 * Filters the available menu items.
       
   238 		 *
       
   239 		 * @since 4.3.0
       
   240 		 *
       
   241 		 * @param array  $items  The array of menu items.
       
   242 		 * @param string $type   The object type.
       
   243 		 * @param string $object The object name.
       
   244 		 * @param int    $page   The current page number.
       
   245 		 */
       
   246 		$items = apply_filters( 'customize_nav_menu_available_items', $items, $type, $object, $page );
       
   247 
       
   248 		return $items;
       
   249 	}
       
   250 
       
   251 	/**
       
   252 	 * Ajax handler for searching available menu items.
       
   253 	 *
       
   254 	 * @since 4.3.0
       
   255 	 */
       
   256 	public function ajax_search_available_items() {
       
   257 		check_ajax_referer( 'customize-menus', 'customize-menus-nonce' );
       
   258 
       
   259 		if ( ! current_user_can( 'edit_theme_options' ) ) {
       
   260 			wp_die( -1 );
       
   261 		}
       
   262 
       
   263 		if ( empty( $_POST['search'] ) ) {
       
   264 			wp_send_json_error( 'nav_menus_missing_search_parameter' );
       
   265 		}
       
   266 
       
   267 		$p = isset( $_POST['page'] ) ? absint( $_POST['page'] ) : 0;
       
   268 		if ( $p < 1 ) {
       
   269 			$p = 1;
       
   270 		}
       
   271 
       
   272 		$s = sanitize_text_field( wp_unslash( $_POST['search'] ) );
       
   273 		$items = $this->search_available_items_query( array( 'pagenum' => $p, 's' => $s ) );
       
   274 
       
   275 		if ( empty( $items ) ) {
       
   276 			wp_send_json_error( array( 'message' => __( 'No results found.' ) ) );
       
   277 		} else {
       
   278 			wp_send_json_success( array( 'items' => $items ) );
       
   279 		}
       
   280 	}
       
   281 
       
   282 	/**
       
   283 	 * Performs post queries for available-item searching.
       
   284 	 *
       
   285 	 * Based on WP_Editor::wp_link_query().
       
   286 	 *
       
   287 	 * @since 4.3.0
       
   288 	 *
       
   289 	 * @param array $args Optional. Accepts 'pagenum' and 's' (search) arguments.
       
   290 	 * @return array Menu items.
       
   291 	 */
       
   292 	public function search_available_items_query( $args = array() ) {
       
   293 		$items = array();
       
   294 
       
   295 		$post_type_objects = get_post_types( array( 'show_in_nav_menus' => true ), 'objects' );
       
   296 		$query = array(
       
   297 			'post_type'              => array_keys( $post_type_objects ),
       
   298 			'suppress_filters'       => true,
       
   299 			'update_post_term_cache' => false,
       
   300 			'update_post_meta_cache' => false,
       
   301 			'post_status'            => 'publish',
       
   302 			'posts_per_page'         => 20,
       
   303 		);
       
   304 
       
   305 		$args['pagenum'] = isset( $args['pagenum'] ) ? absint( $args['pagenum'] ) : 1;
       
   306 		$query['offset'] = $args['pagenum'] > 1 ? $query['posts_per_page'] * ( $args['pagenum'] - 1 ) : 0;
       
   307 
       
   308 		if ( isset( $args['s'] ) ) {
       
   309 			$query['s'] = $args['s'];
       
   310 		}
       
   311 
       
   312 		$posts = array();
       
   313 
       
   314 		// Prepend list of posts with nav_menus_created_posts search results on first page.
       
   315 		$nav_menus_created_posts_setting = $this->manager->get_setting( 'nav_menus_created_posts' );
       
   316 		if ( 1 === $args['pagenum'] && $nav_menus_created_posts_setting && count( $nav_menus_created_posts_setting->value() ) > 0 ) {
       
   317 			$stub_post_query = new WP_Query( array_merge(
       
   318 				$query,
       
   319 				array(
       
   320 					'post_status' => 'auto-draft',
       
   321 					'post__in' => $nav_menus_created_posts_setting->value(),
       
   322 					'posts_per_page' => -1,
       
   323 				)
       
   324 			) );
       
   325 			$posts = array_merge( $posts, $stub_post_query->posts );
       
   326 		}
       
   327 
       
   328 		// Query posts.
       
   329 		$get_posts = new WP_Query( $query );
       
   330 		$posts = array_merge( $posts, $get_posts->posts );
       
   331 
       
   332 		// Create items for posts.
       
   333 		foreach ( $posts as $post ) {
       
   334 			$post_title = $post->post_title;
       
   335 			if ( '' === $post_title ) {
       
   336 				/* translators: %d: ID of a post */
       
   337 				$post_title = sprintf( __( '#%d (no title)' ), $post->ID );
       
   338 			}
       
   339 			$items[] = array(
       
   340 				'id'         => 'post-' . $post->ID,
       
   341 				'title'      => html_entity_decode( $post_title, ENT_QUOTES, get_bloginfo( 'charset' ) ),
       
   342 				'type'       => 'post_type',
       
   343 				'type_label' => $post_type_objects[ $post->post_type ]->labels->singular_name,
       
   344 				'object'     => $post->post_type,
       
   345 				'object_id'  => intval( $post->ID ),
       
   346 				'url'        => get_permalink( intval( $post->ID ) ),
       
   347 			);
       
   348 		}
       
   349 
       
   350 		// Query taxonomy terms.
       
   351 		$taxonomies = get_taxonomies( array( 'show_in_nav_menus' => true ), 'names' );
       
   352 		$terms = get_terms( $taxonomies, array(
       
   353 			'name__like' => $args['s'],
       
   354 			'number'     => 20,
       
   355 			'offset'     => 20 * ($args['pagenum'] - 1),
       
   356 		) );
       
   357 
       
   358 		// Check if any taxonomies were found.
       
   359 		if ( ! empty( $terms ) ) {
       
   360 			foreach ( $terms as $term ) {
       
   361 				$items[] = array(
       
   362 					'id'         => 'term-' . $term->term_id,
       
   363 					'title'      => html_entity_decode( $term->name, ENT_QUOTES, get_bloginfo( 'charset' ) ),
       
   364 					'type'       => 'taxonomy',
       
   365 					'type_label' => get_taxonomy( $term->taxonomy )->labels->singular_name,
       
   366 					'object'     => $term->taxonomy,
       
   367 					'object_id'  => intval( $term->term_id ),
       
   368 					'url'        => get_term_link( intval( $term->term_id ), $term->taxonomy ),
       
   369 				);
       
   370 			}
       
   371 		}
       
   372 
       
   373 		// Add "Home" link if search term matches. Treat as a page, but switch to custom on add.
       
   374 		if ( isset( $args['s'] ) ) {
       
   375 			$title = _x( 'Home', 'nav menu home label' );
       
   376 			$matches = function_exists( 'mb_stripos' ) ? false !== mb_stripos( $title, $args['s'] ) : false !== stripos( $title, $args['s'] );
       
   377 			if ( $matches ) {
       
   378 				$items[] = array(
       
   379 					'id'         => 'home',
       
   380 					'title'      => $title,
       
   381 					'type'       => 'custom',
       
   382 					'type_label' => __( 'Custom Link' ),
       
   383 					'object'     => '',
       
   384 					'url'        => home_url(),
       
   385 				);
       
   386 			}
       
   387 		}
       
   388 
       
   389 		/**
       
   390 		 * Filters the available menu items during a search request.
       
   391 		 *
       
   392 		 * @since 4.5.0
       
   393 		 *
       
   394 		 * @param array $items The array of menu items.
       
   395 		 * @param array $args  Includes 'pagenum' and 's' (search) arguments.
       
   396 		 */
       
   397 		$items = apply_filters( 'customize_nav_menu_searched_items', $items, $args );
       
   398 
       
   399 		return $items;
       
   400 	}
       
   401 
       
   402 	/**
       
   403 	 * Enqueue scripts and styles for Customizer pane.
       
   404 	 *
       
   405 	 * @since 4.3.0
       
   406 	 */
       
   407 	public function enqueue_scripts() {
       
   408 		wp_enqueue_style( 'customize-nav-menus' );
       
   409 		wp_enqueue_script( 'customize-nav-menus' );
       
   410 
       
   411 		$temp_nav_menu_setting      = new WP_Customize_Nav_Menu_Setting( $this->manager, 'nav_menu[-1]' );
       
   412 		$temp_nav_menu_item_setting = new WP_Customize_Nav_Menu_Item_Setting( $this->manager, 'nav_menu_item[-1]' );
       
   413 
       
   414 		$num_locations = count( get_registered_nav_menus() );
       
   415 		if ( 1 === $num_locations ) {
       
   416 			$locations_description = __( 'Your theme can display menus in one location.' );
       
   417 		} else {
       
   418 			/* translators: %s: number of menu locations */
       
   419 			$locations_description = sprintf( _n( 'Your theme can display menus in %s location.', 'Your theme can display menus in %s locations.', $num_locations ), number_format_i18n( $num_locations ) );
       
   420 		}
       
   421 
       
   422 		// Pass data to JS.
       
   423 		$settings = array(
       
   424 			'allMenus'             => wp_get_nav_menus(),
       
   425 			'itemTypes'            => $this->available_item_types(),
       
   426 			'l10n'                 => array(
       
   427 				'untitled'               => _x( '(no label)', 'missing menu item navigation label' ),
       
   428 				'unnamed'                => _x( '(unnamed)', 'Missing menu name.' ),
       
   429 				'custom_label'           => __( 'Custom Link' ),
       
   430 				'page_label'             => get_post_type_object( 'page' )->labels->singular_name,
       
   431 				/* translators: %s:      menu location */
       
   432 				'menuLocation'           => _x( '(Currently set to: %s)', 'menu' ),
       
   433 				'locationsTitle'         => 1 === $num_locations ? __( 'Menu Location' ) : __( 'Menu Locations' ),
       
   434 				'locationsDescription'   => $locations_description,
       
   435 				'menuNameLabel'          => __( 'Menu Name' ),
       
   436 				'newMenuNameDescription' => __( 'If your theme has multiple menus, giving them clear names will help you manage them.' ),
       
   437 				'itemAdded'              => __( 'Menu item added' ),
       
   438 				'itemDeleted'            => __( 'Menu item deleted' ),
       
   439 				'menuAdded'              => __( 'Menu created' ),
       
   440 				'menuDeleted'            => __( 'Menu deleted' ),
       
   441 				'movedUp'                => __( 'Menu item moved up' ),
       
   442 				'movedDown'              => __( 'Menu item moved down' ),
       
   443 				'movedLeft'              => __( 'Menu item moved out of submenu' ),
       
   444 				'movedRight'             => __( 'Menu item is now a sub-item' ),
       
   445 				/* translators: &#9656; is the unicode right-pointing triangle, and %s is the section title in the Customizer */
       
   446 				'customizingMenus'       => sprintf( __( 'Customizing &#9656; %s' ), esc_html( $this->manager->get_panel( 'nav_menus' )->title ) ),
       
   447 				/* translators: %s: title of menu item which is invalid */
       
   448 				'invalidTitleTpl'        => __( '%s (Invalid)' ),
       
   449 				/* translators: %s: title of menu item in draft status */
       
   450 				'pendingTitleTpl'        => __( '%s (Pending)' ),
       
   451 				'itemsFound'             => __( 'Number of items found: %d' ),
       
   452 				'itemsFoundMore'         => __( 'Additional items found: %d' ),
       
   453 				'itemsLoadingMore'       => __( 'Loading more results... please wait.' ),
       
   454 				'reorderModeOn'          => __( 'Reorder mode enabled' ),
       
   455 				'reorderModeOff'         => __( 'Reorder mode closed' ),
       
   456 				'reorderLabelOn'         => esc_attr__( 'Reorder menu items' ),
       
   457 				'reorderLabelOff'        => esc_attr__( 'Close reorder mode' ),
       
   458 			),
       
   459 			'settingTransport'     => 'postMessage',
       
   460 			'phpIntMax'            => PHP_INT_MAX,
       
   461 			'defaultSettingValues' => array(
       
   462 				'nav_menu'      => $temp_nav_menu_setting->default,
       
   463 				'nav_menu_item' => $temp_nav_menu_item_setting->default,
       
   464 			),
       
   465 			'locationSlugMappedToName' => get_registered_nav_menus(),
       
   466 		);
       
   467 
       
   468 		$data = sprintf( 'var _wpCustomizeNavMenusSettings = %s;', wp_json_encode( $settings ) );
       
   469 		wp_scripts()->add_data( 'customize-nav-menus', 'data', $data );
       
   470 
       
   471 		// This is copied from nav-menus.php, and it has an unfortunate object name of `menus`.
       
   472 		$nav_menus_l10n = array(
       
   473 			'oneThemeLocationNoMenus' => null,
       
   474 			'moveUp'       => __( 'Move up one' ),
       
   475 			'moveDown'     => __( 'Move down one' ),
       
   476 			'moveToTop'    => __( 'Move to the top' ),
       
   477 			/* translators: %s: previous item name */
       
   478 			'moveUnder'    => __( 'Move under %s' ),
       
   479 			/* translators: %s: previous item name */
       
   480 			'moveOutFrom'  => __( 'Move out from under %s' ),
       
   481 			/* translators: %s: previous item name */
       
   482 			'under'        => __( 'Under %s' ),
       
   483 			/* translators: %s: previous item name */
       
   484 			'outFrom'      => __( 'Out from under %s' ),
       
   485 			/* translators: 1: item name, 2: item position, 3: total number of items */
       
   486 			'menuFocus'    => __( '%1$s. Menu item %2$d of %3$d.' ),
       
   487 			/* translators: 1: item name, 2: item position, 3: parent item name */
       
   488 			'subMenuFocus' => __( '%1$s. Sub item number %2$d under %3$s.' ),
       
   489 		);
       
   490 		wp_localize_script( 'nav-menu', 'menus', $nav_menus_l10n );
       
   491 	}
       
   492 
       
   493 	/**
       
   494 	 * Filters a dynamic setting's constructor args.
       
   495 	 *
       
   496 	 * For a dynamic setting to be registered, this filter must be employed
       
   497 	 * to override the default false value with an array of args to pass to
       
   498 	 * the WP_Customize_Setting constructor.
       
   499 	 *
       
   500 	 * @since 4.3.0
       
   501 	 *
       
   502 	 * @param false|array $setting_args The arguments to the WP_Customize_Setting constructor.
       
   503 	 * @param string      $setting_id   ID for dynamic setting, usually coming from `$_POST['customized']`.
       
   504 	 * @return array|false
       
   505 	 */
       
   506 	public function filter_dynamic_setting_args( $setting_args, $setting_id ) {
       
   507 		if ( preg_match( WP_Customize_Nav_Menu_Setting::ID_PATTERN, $setting_id ) ) {
       
   508 			$setting_args = array(
       
   509 				'type'      => WP_Customize_Nav_Menu_Setting::TYPE,
       
   510 				'transport' => 'postMessage',
       
   511 			);
       
   512 		} elseif ( preg_match( WP_Customize_Nav_Menu_Item_Setting::ID_PATTERN, $setting_id ) ) {
       
   513 			$setting_args = array(
       
   514 				'type'      => WP_Customize_Nav_Menu_Item_Setting::TYPE,
       
   515 				'transport' => 'postMessage',
       
   516 			);
       
   517 		}
       
   518 		return $setting_args;
       
   519 	}
       
   520 
       
   521 	/**
       
   522 	 * Allow non-statically created settings to be constructed with custom WP_Customize_Setting subclass.
       
   523 	 *
       
   524 	 * @since 4.3.0
       
   525 	 *
       
   526 	 * @param string $setting_class WP_Customize_Setting or a subclass.
       
   527 	 * @param string $setting_id    ID for dynamic setting, usually coming from `$_POST['customized']`.
       
   528 	 * @param array  $setting_args  WP_Customize_Setting or a subclass.
       
   529 	 * @return string
       
   530 	 */
       
   531 	public function filter_dynamic_setting_class( $setting_class, $setting_id, $setting_args ) {
       
   532 		unset( $setting_id );
       
   533 
       
   534 		if ( ! empty( $setting_args['type'] ) && WP_Customize_Nav_Menu_Setting::TYPE === $setting_args['type'] ) {
       
   535 			$setting_class = 'WP_Customize_Nav_Menu_Setting';
       
   536 		} elseif ( ! empty( $setting_args['type'] ) && WP_Customize_Nav_Menu_Item_Setting::TYPE === $setting_args['type'] ) {
       
   537 			$setting_class = 'WP_Customize_Nav_Menu_Item_Setting';
       
   538 		}
       
   539 		return $setting_class;
       
   540 	}
       
   541 
       
   542 	/**
       
   543 	 * Add the customizer settings and controls.
       
   544 	 *
       
   545 	 * @since 4.3.0
       
   546 	 */
       
   547 	public function customize_register() {
       
   548 		$changeset = $this->manager->unsanitized_post_values();
       
   549 
       
   550 		// Preview settings for nav menus early so that the sections and controls will be added properly.
       
   551 		$nav_menus_setting_ids = array();
       
   552 		foreach ( array_keys( $changeset ) as $setting_id ) {
       
   553 			if ( preg_match( '/^(nav_menu_locations|nav_menu|nav_menu_item)\[/', $setting_id ) ) {
       
   554 				$nav_menus_setting_ids[] = $setting_id;
       
   555 			}
       
   556 		}
       
   557 		$settings = $this->manager->add_dynamic_settings( $nav_menus_setting_ids );
       
   558 		if ( $this->manager->settings_previewed() ) {
       
   559 			foreach ( $settings as $setting ) {
       
   560 				$setting->preview();
       
   561 			}
       
   562 		}
       
   563 
       
   564 		// Require JS-rendered control types.
       
   565 		$this->manager->register_panel_type( 'WP_Customize_Nav_Menus_Panel' );
       
   566 		$this->manager->register_control_type( 'WP_Customize_Nav_Menu_Control' );
       
   567 		$this->manager->register_control_type( 'WP_Customize_Nav_Menu_Name_Control' );
       
   568 		$this->manager->register_control_type( 'WP_Customize_Nav_Menu_Locations_Control' );
       
   569 		$this->manager->register_control_type( 'WP_Customize_Nav_Menu_Auto_Add_Control' );
       
   570 		$this->manager->register_control_type( 'WP_Customize_Nav_Menu_Item_Control' );
       
   571 
       
   572 		// Create a panel for Menus.
       
   573 		$description = '<p>' . __( 'This panel is used for managing navigation menus for content you have already published on your site. You can create menus and add items for existing content such as pages, posts, categories, tags, formats, or custom links.' ) . '</p>';
       
   574 		if ( current_theme_supports( 'widgets' ) ) {
       
   575 			/* translators: URL to the widgets panel of the customizer */
       
   576 			$description .= '<p>' . sprintf( __( 'Menus can be displayed in locations defined by your theme or in <a href="%s">widget areas</a> by adding a &#8220;Navigation Menu&#8221; widget.' ), "javascript:wp.customize.panel( 'widgets' ).focus();" ) . '</p>';
       
   577 		} else {
       
   578 			$description .= '<p>' . __( 'Menus can be displayed in locations defined by your theme.' ) . '</p>';
       
   579 		}
       
   580 		$this->manager->add_panel( new WP_Customize_Nav_Menus_Panel( $this->manager, 'nav_menus', array(
       
   581 			'title'       => __( 'Menus' ),
       
   582 			'description' => $description,
       
   583 			'priority'    => 100,
       
   584 			// 'theme_supports' => 'menus|widgets', @todo allow multiple theme supports
       
   585 		) ) );
       
   586 		$menus = wp_get_nav_menus();
       
   587 
       
   588 		// Menu locations.
       
   589 		$locations     = get_registered_nav_menus();
       
   590 		$num_locations = count( $locations );
       
   591 		if ( 1 == $num_locations ) {
       
   592 			$description = '<p>' . __( 'Your theme can display menus in one location. Select which menu you would like to use.' ) . '</p>';
       
   593 		} else {
       
   594 			/* translators: %s: number of menu locations */
       
   595 			$description = '<p>' . sprintf( _n( 'Your theme can display menus in %s location. Select which menu you would like to use.', 'Your theme can display menus in %s locations. Select which menu appears in each location.', $num_locations ), number_format_i18n( $num_locations ) ) . '</p>';
       
   596 		}
       
   597 
       
   598 		if ( current_theme_supports( 'widgets' ) ) {
       
   599 			/* translators: URL to the widgets panel of the customizer */
       
   600 			$description .= '<p>' . sprintf( __( 'If your theme has widget areas, you can also add menus there. Visit the <a href="%s">Widgets panel</a> and add a &#8220;Navigation Menu widget&#8221; to display a menu in a sidebar or footer.' ), "javascript:wp.customize.panel( 'widgets' ).focus();" ) . '</p>';
       
   601 		}
       
   602 
       
   603 		$this->manager->add_section( 'menu_locations', array(
       
   604 			'title'       => 1 === $num_locations ? _x( 'View Location', 'menu locations' ) : _x( 'View All Locations', 'menu locations' ),
       
   605 			'panel'       => 'nav_menus',
       
   606 			'priority'    => 30,
       
   607 			'description' => $description,
       
   608 		) );
       
   609 
       
   610 		$choices = array( '0' => __( '&mdash; Select &mdash;' ) );
       
   611 		foreach ( $menus as $menu ) {
       
   612 			$choices[ $menu->term_id ] = wp_html_excerpt( $menu->name, 40, '&hellip;' );
       
   613 		}
       
   614 
       
   615 		// Attempt to re-map the nav menu location assignments when previewing a theme switch.
       
   616 		$mapped_nav_menu_locations = array();
       
   617 		if ( ! $this->manager->is_theme_active() ) {
       
   618 			$theme_mods = get_option( 'theme_mods_' . $this->manager->get_stylesheet(), array() );
       
   619 
       
   620 			// If there is no data from a previous activation, start fresh.
       
   621 			if ( empty( $theme_mods['nav_menu_locations'] ) ) {
       
   622 				$theme_mods['nav_menu_locations'] = array();
       
   623 			}
       
   624 
       
   625 			$mapped_nav_menu_locations = wp_map_nav_menu_locations( $theme_mods['nav_menu_locations'], $this->original_nav_menu_locations );
       
   626 		}
       
   627 
       
   628 		foreach ( $locations as $location => $description ) {
       
   629 			$setting_id = "nav_menu_locations[{$location}]";
       
   630 
       
   631 			$setting = $this->manager->get_setting( $setting_id );
       
   632 			if ( $setting ) {
       
   633 				$setting->transport = 'postMessage';
       
   634 				remove_filter( "customize_sanitize_{$setting_id}", 'absint' );
       
   635 				add_filter( "customize_sanitize_{$setting_id}", array( $this, 'intval_base10' ) );
       
   636 			} else {
       
   637 				$this->manager->add_setting( $setting_id, array(
       
   638 					'sanitize_callback' => array( $this, 'intval_base10' ),
       
   639 					'theme_supports'    => 'menus',
       
   640 					'type'              => 'theme_mod',
       
   641 					'transport'         => 'postMessage',
       
   642 					'default'           => 0,
       
   643 				) );
       
   644 			}
       
   645 
       
   646 			// Override the assigned nav menu location if mapped during previewed theme switch.
       
   647 			if ( empty( $changeset[ $setting_id ] ) && isset( $mapped_nav_menu_locations[ $location ] ) ) {
       
   648 				$this->manager->set_post_value( $setting_id, $mapped_nav_menu_locations[ $location ] );
       
   649 			}
       
   650 
       
   651 			$this->manager->add_control( new WP_Customize_Nav_Menu_Location_Control( $this->manager, $setting_id, array(
       
   652 				'label'       => $description,
       
   653 				'location_id' => $location,
       
   654 				'section'     => 'menu_locations',
       
   655 				'choices'     => $choices,
       
   656 			) ) );
       
   657 		}
       
   658 
       
   659 		// Register each menu as a Customizer section, and add each menu item to each menu.
       
   660 		foreach ( $menus as $menu ) {
       
   661 			$menu_id = $menu->term_id;
       
   662 
       
   663 			// Create a section for each menu.
       
   664 			$section_id = 'nav_menu[' . $menu_id . ']';
       
   665 			$this->manager->add_section( new WP_Customize_Nav_Menu_Section( $this->manager, $section_id, array(
       
   666 				'title'     => html_entity_decode( $menu->name, ENT_QUOTES, get_bloginfo( 'charset' ) ),
       
   667 				'priority'  => 10,
       
   668 				'panel'     => 'nav_menus',
       
   669 			) ) );
       
   670 
       
   671 			$nav_menu_setting_id = 'nav_menu[' . $menu_id . ']';
       
   672 			$this->manager->add_setting( new WP_Customize_Nav_Menu_Setting( $this->manager, $nav_menu_setting_id, array(
       
   673 				'transport' => 'postMessage',
       
   674 			) ) );
       
   675 
       
   676 			// Add the menu contents.
       
   677 			$menu_items = (array) wp_get_nav_menu_items( $menu_id );
       
   678 
       
   679 			foreach ( array_values( $menu_items ) as $i => $item ) {
       
   680 
       
   681 				// Create a setting for each menu item (which doesn't actually manage data, currently).
       
   682 				$menu_item_setting_id = 'nav_menu_item[' . $item->ID . ']';
       
   683 
       
   684 				$value = (array) $item;
       
   685 				if ( empty( $value['post_title'] ) ) {
       
   686 					$value['title'] = '';
       
   687 				}
       
   688 
       
   689 				$value['nav_menu_term_id'] = $menu_id;
       
   690 				$this->manager->add_setting( new WP_Customize_Nav_Menu_Item_Setting( $this->manager, $menu_item_setting_id, array(
       
   691 					'value'     => $value,
       
   692 					'transport' => 'postMessage',
       
   693 				) ) );
       
   694 
       
   695 				// Create a control for each menu item.
       
   696 				$this->manager->add_control( new WP_Customize_Nav_Menu_Item_Control( $this->manager, $menu_item_setting_id, array(
       
   697 					'label'    => $item->title,
       
   698 					'section'  => $section_id,
       
   699 					'priority' => 10 + $i,
       
   700 				) ) );
       
   701 			}
       
   702 
       
   703 			// Note: other controls inside of this section get added dynamically in JS via the MenuSection.ready() function.
       
   704 		}
       
   705 
       
   706 		// Add the add-new-menu section and controls.
       
   707 		$this->manager->add_section( 'add_menu', array(
       
   708 			'type'     => 'new_menu',
       
   709 			'title'    => __( 'New Menu' ),
       
   710 			'panel'    => 'nav_menus',
       
   711 			'priority' => 20,
       
   712 		) );
       
   713 
       
   714 		$this->manager->add_setting( new WP_Customize_Filter_Setting( $this->manager, 'nav_menus_created_posts', array(
       
   715 			'transport' => 'postMessage',
       
   716 			'type' => 'option', // To prevent theme prefix in changeset.
       
   717 			'default' => array(),
       
   718 			'sanitize_callback' => array( $this, 'sanitize_nav_menus_created_posts' ),
       
   719 		) ) );
       
   720 	}
       
   721 
       
   722 	/**
       
   723 	 * Get the base10 intval.
       
   724 	 *
       
   725 	 * This is used as a setting's sanitize_callback; we can't use just plain
       
   726 	 * intval because the second argument is not what intval() expects.
       
   727 	 *
       
   728 	 * @since 4.3.0
       
   729 	 *
       
   730 	 * @param mixed $value Number to convert.
       
   731 	 * @return int Integer.
       
   732 	 */
       
   733 	public function intval_base10( $value ) {
       
   734 		return intval( $value, 10 );
       
   735 	}
       
   736 
       
   737 	/**
       
   738 	 * Return an array of all the available item types.
       
   739 	 *
       
   740 	 * @since 4.3.0
       
   741 	 * @since 4.7.0  Each array item now includes a `$type_label` in addition to `$title`, `$type`, and `$object`.
       
   742 	 *
       
   743 	 * @return array The available menu item types.
       
   744 	 */
       
   745 	public function available_item_types() {
       
   746 		$item_types = array();
       
   747 
       
   748 		$post_types = get_post_types( array( 'show_in_nav_menus' => true ), 'objects' );
       
   749 		if ( $post_types ) {
       
   750 			foreach ( $post_types as $slug => $post_type ) {
       
   751 				$item_types[] = array(
       
   752 					'title'  => $post_type->labels->name,
       
   753 					'type_label' => $post_type->labels->singular_name,
       
   754 					'type' => 'post_type',
       
   755 					'object' => $post_type->name,
       
   756 				);
       
   757 			}
       
   758 		}
       
   759 
       
   760 		$taxonomies = get_taxonomies( array( 'show_in_nav_menus' => true ), 'objects' );
       
   761 		if ( $taxonomies ) {
       
   762 			foreach ( $taxonomies as $slug => $taxonomy ) {
       
   763 				if ( 'post_format' === $taxonomy && ! current_theme_supports( 'post-formats' ) ) {
       
   764 					continue;
       
   765 				}
       
   766 				$item_types[] = array(
       
   767 					'title' => $taxonomy->labels->name,
       
   768 					'type_label' => $taxonomy->labels->singular_name,
       
   769 					'type' => 'taxonomy',
       
   770 					'object' => $taxonomy->name,
       
   771 				);
       
   772 			}
       
   773 		}
       
   774 
       
   775 		/**
       
   776 		 * Filters the available menu item types.
       
   777 		 *
       
   778 		 * @since 4.3.0
       
   779 		 * @since 4.7.0  Each array item now includes a `$type_label` in addition to `$title`, `$type`, and `$object`.
       
   780 		 *
       
   781 		 * @param array $item_types Navigation menu item types.
       
   782 		 */
       
   783 		$item_types = apply_filters( 'customize_nav_menu_available_item_types', $item_types );
       
   784 
       
   785 		return $item_types;
       
   786 	}
       
   787 
       
   788 	/**
       
   789 	 * Add a new `auto-draft` post.
       
   790 	 *
       
   791 	 * @since 4.7.0
       
   792 	 *
       
   793 	 * @param array $postarr {
       
   794 	 *     Post array. Note that post_status is overridden to be `auto-draft`.
       
   795 	 *
       
   796 	 *     @var string $post_title   Post title. Required.
       
   797 	 *     @var string $post_type    Post type. Required.
       
   798 	 *     @var string $post_name    Post name.
       
   799 	 *     @var string $post_content Post content.
       
   800 	 * }
       
   801 	 * @return WP_Post|WP_Error Inserted auto-draft post object or error.
       
   802 	 */
       
   803 	public function insert_auto_draft_post( $postarr ) {
       
   804 		if ( ! isset( $postarr['post_type'] ) ) {
       
   805 			return new WP_Error( 'unknown_post_type', __( 'Invalid post type.' ) );
       
   806 		}
       
   807 		if ( empty( $postarr['post_title'] ) ) {
       
   808 			return new WP_Error( 'empty_title', __( 'Empty title' ) );
       
   809 		}
       
   810 		if ( ! empty( $postarr['post_status'] ) ) {
       
   811 			return new WP_Error( 'status_forbidden', __( 'Status is forbidden' ) );
       
   812 		}
       
   813 
       
   814 		/*
       
   815 		 * If the changeset is a draft, this will change to draft the next time the changeset
       
   816 		 * is updated; otherwise, auto-draft will persist in autosave revisions, until save.
       
   817 		 */
       
   818 		$postarr['post_status'] = 'auto-draft';
       
   819 
       
   820 		// Auto-drafts are allowed to have empty post_names, so it has to be explicitly set.
       
   821 		if ( empty( $postarr['post_name'] ) ) {
       
   822 			$postarr['post_name'] = sanitize_title( $postarr['post_title'] );
       
   823 		}
       
   824 		if ( ! isset( $postarr['meta_input'] ) ) {
       
   825 			$postarr['meta_input'] = array();
       
   826 		}
       
   827 		$postarr['meta_input']['_customize_draft_post_name'] = $postarr['post_name'];
       
   828 		$postarr['meta_input']['_customize_changeset_uuid'] = $this->manager->changeset_uuid();
       
   829 		unset( $postarr['post_name'] );
       
   830 
       
   831 		add_filter( 'wp_insert_post_empty_content', '__return_false', 1000 );
       
   832 		$r = wp_insert_post( wp_slash( $postarr ), true );
       
   833 		remove_filter( 'wp_insert_post_empty_content', '__return_false', 1000 );
       
   834 
       
   835 		if ( is_wp_error( $r ) ) {
       
   836 			return $r;
       
   837 		} else {
       
   838 			return get_post( $r );
       
   839 		}
       
   840 	}
       
   841 
       
   842 	/**
       
   843 	 * Ajax handler for adding a new auto-draft post.
       
   844 	 *
       
   845 	 * @since 4.7.0
       
   846 	 */
       
   847 	public function ajax_insert_auto_draft_post() {
       
   848 		if ( ! check_ajax_referer( 'customize-menus', 'customize-menus-nonce', false ) ) {
       
   849 			wp_send_json_error( 'bad_nonce', 400 );
       
   850 		}
       
   851 
       
   852 		if ( ! current_user_can( 'customize' ) ) {
       
   853 			wp_send_json_error( 'customize_not_allowed', 403 );
       
   854 		}
       
   855 
       
   856 		if ( empty( $_POST['params'] ) || ! is_array( $_POST['params'] ) ) {
       
   857 			wp_send_json_error( 'missing_params', 400 );
       
   858 		}
       
   859 
       
   860 		$params = wp_unslash( $_POST['params'] );
       
   861 		$illegal_params = array_diff( array_keys( $params ), array( 'post_type', 'post_title' ) );
       
   862 		if ( ! empty( $illegal_params ) ) {
       
   863 			wp_send_json_error( 'illegal_params', 400 );
       
   864 		}
       
   865 
       
   866 		$params = array_merge(
       
   867 			array(
       
   868 				'post_type' => '',
       
   869 				'post_title' => '',
       
   870 			),
       
   871 			$params
       
   872 		);
       
   873 
       
   874 		if ( empty( $params['post_type'] ) || ! post_type_exists( $params['post_type'] ) ) {
       
   875 			status_header( 400 );
       
   876 			wp_send_json_error( 'missing_post_type_param' );
       
   877 		}
       
   878 
       
   879 		$post_type_object = get_post_type_object( $params['post_type'] );
       
   880 		if ( ! current_user_can( $post_type_object->cap->create_posts ) || ! current_user_can( $post_type_object->cap->publish_posts ) ) {
       
   881 			status_header( 403 );
       
   882 			wp_send_json_error( 'insufficient_post_permissions' );
       
   883 		}
       
   884 
       
   885 		$params['post_title'] = trim( $params['post_title'] );
       
   886 		if ( '' === $params['post_title'] ) {
       
   887 			status_header( 400 );
       
   888 			wp_send_json_error( 'missing_post_title' );
       
   889 		}
       
   890 
       
   891 		$r = $this->insert_auto_draft_post( $params );
       
   892 		if ( is_wp_error( $r ) ) {
       
   893 			$error = $r;
       
   894 			if ( ! empty( $post_type_object->labels->singular_name ) ) {
       
   895 				$singular_name = $post_type_object->labels->singular_name;
       
   896 			} else {
       
   897 				$singular_name = __( 'Post' );
       
   898 			}
       
   899 
       
   900 			$data = array(
       
   901 				/* translators: %1$s is the post type name and %2$s is the error message. */
       
   902 				'message' => sprintf( __( '%1$s could not be created: %2$s' ), $singular_name, $error->get_error_message() ),
       
   903 			);
       
   904 			wp_send_json_error( $data );
       
   905 		} else {
       
   906 			$post = $r;
       
   907 			$data = array(
       
   908 				'post_id' => $post->ID,
       
   909 				'url'     => get_permalink( $post->ID ),
       
   910 			);
       
   911 			wp_send_json_success( $data );
       
   912 		}
       
   913 	}
       
   914 
       
   915 	/**
       
   916 	 * Print the JavaScript templates used to render Menu Customizer components.
       
   917 	 *
       
   918 	 * Templates are imported into the JS use wp.template.
       
   919 	 *
       
   920 	 * @since 4.3.0
       
   921 	 */
       
   922 	public function print_templates() {
       
   923 		?>
       
   924 		<script type="text/html" id="tmpl-available-menu-item">
       
   925 			<li id="menu-item-tpl-{{ data.id }}" class="menu-item-tpl" data-menu-item-id="{{ data.id }}">
       
   926 				<div class="menu-item-bar">
       
   927 					<div class="menu-item-handle">
       
   928 						<span class="item-type" aria-hidden="true">{{ data.type_label }}</span>
       
   929 						<span class="item-title" aria-hidden="true">
       
   930 							<span class="menu-item-title<# if ( ! data.title ) { #> no-title<# } #>">{{ data.title || wp.customize.Menus.data.l10n.untitled }}</span>
       
   931 						</span>
       
   932 						<button type="button" class="button-link item-add">
       
   933 							<span class="screen-reader-text"><?php
       
   934 								/* translators: 1: Title of a menu item, 2: Type of a menu item */
       
   935 								printf( __( 'Add to menu: %1$s (%2$s)' ), '{{ data.title || wp.customize.Menus.data.l10n.untitled }}', '{{ data.type_label }}' );
       
   936 							?></span>
       
   937 						</button>
       
   938 					</div>
       
   939 				</div>
       
   940 			</li>
       
   941 		</script>
       
   942 
       
   943 		<script type="text/html" id="tmpl-menu-item-reorder-nav">
       
   944 			<div class="menu-item-reorder-nav">
       
   945 				<?php
       
   946 				printf(
       
   947 					'<button type="button" class="menus-move-up">%1$s</button><button type="button" class="menus-move-down">%2$s</button><button type="button" class="menus-move-left">%3$s</button><button type="button" class="menus-move-right">%4$s</button>',
       
   948 					__( 'Move up' ),
       
   949 					__( 'Move down' ),
       
   950 					__( 'Move one level up' ),
       
   951 					__( 'Move one level down' )
       
   952 				);
       
   953 				?>
       
   954 			</div>
       
   955 		</script>
       
   956 
       
   957 		<script type="text/html" id="tmpl-nav-menu-delete-button">
       
   958 			<div class="menu-delete-item">
       
   959 				<button type="button" class="button-link button-link-delete">
       
   960 					<?php _e( 'Delete Menu' ); ?>
       
   961 				</button>
       
   962 			</div>
       
   963 		</script>
       
   964 
       
   965 		<script type="text/html" id="tmpl-nav-menu-submit-new-button">
       
   966 			<p id="customize-new-menu-submit-description"><?php _e( 'Click &#8220;Next&#8221; to start adding links to your new menu.' ); ?></p>
       
   967 			<button id="customize-new-menu-submit" type="button" class="button" aria-describedby="customize-new-menu-submit-description"><?php _e( 'Next' ); ?></button>
       
   968 		</script>
       
   969 
       
   970 		<script type="text/html" id="tmpl-nav-menu-locations-header">
       
   971 			<span class="customize-control-title customize-section-title-menu_locations-heading">{{ data.l10n.locationsTitle }}</span>
       
   972 			<p class="customize-control-description customize-section-title-menu_locations-description">{{ data.l10n.locationsDescription }}</p>
       
   973 		</script>
       
   974 
       
   975 		<script type="text/html" id="tmpl-nav-menu-create-menu-section-title">
       
   976 			<p class="add-new-menu-notice">
       
   977 				<?php _e( 'It doesn&#8217;t look like your site has any menus yet. Want to build one? Click the button to start.' ); ?>
       
   978 			</p>
       
   979 			<p class="add-new-menu-notice">
       
   980 				<?php _e( 'You&#8217;ll create a menu, assign it a location, and add menu items like links to pages and categories. If your theme has multiple menu areas, you might need to create more than one.' ); ?>
       
   981 			</p>
       
   982 			<h3>
       
   983 				<button type="button" class="button customize-add-menu-button">
       
   984 					<?php _e( 'Create New Menu' ); ?>
       
   985 				</button>
       
   986 			</h3>
       
   987 		</script>
       
   988 	<?php
       
   989 	}
       
   990 
       
   991 	/**
       
   992 	 * Print the html template used to render the add-menu-item frame.
       
   993 	 *
       
   994 	 * @since 4.3.0
       
   995 	 */
       
   996 	public function available_items_template() {
       
   997 		?>
       
   998 		<div id="available-menu-items" class="accordion-container">
       
   999 			<div class="customize-section-title">
       
  1000 				<button type="button" class="customize-section-back" tabindex="-1">
       
  1001 					<span class="screen-reader-text"><?php _e( 'Back' ); ?></span>
       
  1002 				</button>
       
  1003 				<h3>
       
  1004 					<span class="customize-action">
       
  1005 						<?php
       
  1006 							/* translators: &#9656; is the unicode right-pointing triangle, and %s is the section title in the Customizer */
       
  1007 							printf( __( 'Customizing &#9656; %s' ), esc_html( $this->manager->get_panel( 'nav_menus' )->title ) );
       
  1008 						?>
       
  1009 					</span>
       
  1010 					<?php _e( 'Add Menu Items' ); ?>
       
  1011 				</h3>
       
  1012 			</div>
       
  1013 			<div id="available-menu-items-search" class="accordion-section cannot-expand">
       
  1014 				<div class="accordion-section-title">
       
  1015 					<label class="screen-reader-text" for="menu-items-search"><?php _e( 'Search Menu Items' ); ?></label>
       
  1016 					<input type="text" id="menu-items-search" placeholder="<?php esc_attr_e( 'Search menu items&hellip;' ) ?>" aria-describedby="menu-items-search-desc" />
       
  1017 					<p class="screen-reader-text" id="menu-items-search-desc"><?php _e( 'The search results will be updated as you type.' ); ?></p>
       
  1018 					<span class="spinner"></span>
       
  1019 				</div>
       
  1020 				<div class="search-icon" aria-hidden="true"></div>
       
  1021 				<button type="button" class="clear-results"><span class="screen-reader-text"><?php _e( 'Clear Results' ); ?></span></button>
       
  1022 				<ul class="accordion-section-content available-menu-items-list" data-type="search"></ul>
       
  1023 			</div>
       
  1024 			<?php
       
  1025 
       
  1026 			// Ensure the page post type comes first in the list.
       
  1027 			$item_types = $this->available_item_types();
       
  1028 			$page_item_type = null;
       
  1029 			foreach ( $item_types as $i => $item_type ) {
       
  1030 				if ( isset( $item_type['object'] ) && 'page' === $item_type['object'] ) {
       
  1031 					$page_item_type = $item_type;
       
  1032 					unset( $item_types[ $i ] );
       
  1033 				}
       
  1034 			}
       
  1035 
       
  1036 			$this->print_custom_links_available_menu_item();
       
  1037 			if ( $page_item_type ) {
       
  1038 				$this->print_post_type_container( $page_item_type );
       
  1039 			}
       
  1040 			// Containers for per-post-type item browsing; items are added with JS.
       
  1041 			foreach ( $item_types as $item_type ) {
       
  1042 				$this->print_post_type_container( $item_type );
       
  1043 			}
       
  1044 			?>
       
  1045 		</div><!-- #available-menu-items -->
       
  1046 	<?php
       
  1047 	}
       
  1048 
       
  1049 	/**
       
  1050 	 * Print the markup for new menu items.
       
  1051 	 *
       
  1052 	 * To be used in the template #available-menu-items.
       
  1053 	 *
       
  1054 	 * @since 4.7.0
       
  1055 	 *
       
  1056 	 * @param array $available_item_type Menu item data to output, including title, type, and label.
       
  1057 	 * @return void
       
  1058 	 */
       
  1059 	protected function print_post_type_container( $available_item_type ) {
       
  1060 		$id = sprintf( 'available-menu-items-%s-%s', $available_item_type['type'], $available_item_type['object'] );
       
  1061 		?>
       
  1062 		<div id="<?php echo esc_attr( $id ); ?>" class="accordion-section">
       
  1063 			<h4 class="accordion-section-title" role="presentation">
       
  1064 				<?php echo esc_html( $available_item_type['title'] ); ?>
       
  1065 				<span class="spinner"></span>
       
  1066 				<span class="no-items"><?php _e( 'No items' ); ?></span>
       
  1067 				<button type="button" class="button-link" aria-expanded="false">
       
  1068 					<span class="screen-reader-text"><?php
       
  1069 						/* translators: %s: Title of a section with menu items */
       
  1070 						printf( __( 'Toggle section: %s' ), esc_html( $available_item_type['title'] ) ); ?></span>
       
  1071 					<span class="toggle-indicator" aria-hidden="true"></span>
       
  1072 				</button>
       
  1073 			</h4>
       
  1074 			<div class="accordion-section-content">
       
  1075 				<?php if ( 'post_type' === $available_item_type['type'] ) : ?>
       
  1076 					<?php $post_type_obj = get_post_type_object( $available_item_type['object'] ); ?>
       
  1077 					<?php if ( current_user_can( $post_type_obj->cap->create_posts ) && current_user_can( $post_type_obj->cap->publish_posts ) ) : ?>
       
  1078 						<div class="new-content-item">
       
  1079 							<label for="<?php echo esc_attr( 'create-item-input-' . $available_item_type['object'] ); ?>" class="screen-reader-text"><?php echo esc_html( $post_type_obj->labels->add_new_item ); ?></label>
       
  1080 							<input type="text" id="<?php echo esc_attr( 'create-item-input-' . $available_item_type['object'] ); ?>" class="create-item-input" placeholder="<?php echo esc_attr( $post_type_obj->labels->add_new_item ); ?>">
       
  1081 							<button type="button" class="button add-content"><?php _e( 'Add' ); ?></button>
       
  1082 						</div>
       
  1083 					<?php endif; ?>
       
  1084 				<?php endif; ?>
       
  1085 				<ul class="available-menu-items-list" data-type="<?php echo esc_attr( $available_item_type['type'] ); ?>" data-object="<?php echo esc_attr( $available_item_type['object'] ); ?>" data-type_label="<?php echo esc_attr( isset( $available_item_type['type_label'] ) ? $available_item_type['type_label'] : $available_item_type['type'] ); ?>"></ul>
       
  1086 			</div>
       
  1087 		</div>
       
  1088 		<?php
       
  1089 	}
       
  1090 
       
  1091 	/**
       
  1092 	 * Print the markup for available menu item custom links.
       
  1093 	 *
       
  1094 	 * @since 4.7.0
       
  1095 	 *
       
  1096 	 * @return void
       
  1097 	 */
       
  1098 	protected function print_custom_links_available_menu_item() {
       
  1099 		?>
       
  1100 		<div id="new-custom-menu-item" class="accordion-section">
       
  1101 			<h4 class="accordion-section-title" role="presentation">
       
  1102 				<?php _e( 'Custom Links' ); ?>
       
  1103 				<button type="button" class="button-link" aria-expanded="false">
       
  1104 					<span class="screen-reader-text"><?php _e( 'Toggle section: Custom Links' ); ?></span>
       
  1105 					<span class="toggle-indicator" aria-hidden="true"></span>
       
  1106 				</button>
       
  1107 			</h4>
       
  1108 			<div class="accordion-section-content customlinkdiv">
       
  1109 				<input type="hidden" value="custom" id="custom-menu-item-type" name="menu-item[-1][menu-item-type]" />
       
  1110 				<p id="menu-item-url-wrap" class="wp-clearfix">
       
  1111 					<label class="howto" for="custom-menu-item-url"><?php _e( 'URL' ); ?></label>
       
  1112 					<input id="custom-menu-item-url" name="menu-item[-1][menu-item-url]" type="text" class="code menu-item-textbox" value="http://">
       
  1113 				</p>
       
  1114 				<p id="menu-item-name-wrap" class="wp-clearfix">
       
  1115 					<label class="howto" for="custom-menu-item-name"><?php _e( 'Link Text' ); ?></label>
       
  1116 					<input id="custom-menu-item-name" name="menu-item[-1][menu-item-title]" type="text" class="regular-text menu-item-textbox">
       
  1117 				</p>
       
  1118 				<p class="button-controls">
       
  1119 					<span class="add-to-menu">
       
  1120 						<input type="submit" class="button submit-add-to-menu right" value="<?php esc_attr_e( 'Add to Menu' ); ?>" name="add-custom-menu-item" id="custom-menu-item-submit">
       
  1121 						<span class="spinner"></span>
       
  1122 					</span>
       
  1123 				</p>
       
  1124 			</div>
       
  1125 		</div>
       
  1126 		<?php
       
  1127 	}
       
  1128 
       
  1129 	//
       
  1130 	// Start functionality specific to partial-refresh of menu changes in Customizer preview.
       
  1131 	//
       
  1132 
       
  1133 	/**
       
  1134 	 * Nav menu args used for each instance, keyed by the args HMAC.
       
  1135 	 *
       
  1136 	 * @since 4.3.0
       
  1137 	 * @var array
       
  1138 	 */
       
  1139 	public $preview_nav_menu_instance_args = array();
       
  1140 
       
  1141 	/**
       
  1142 	 * Filters arguments for dynamic nav_menu selective refresh partials.
       
  1143 	 *
       
  1144 	 * @since 4.5.0
       
  1145 	 *
       
  1146 	 * @param array|false $partial_args Partial args.
       
  1147 	 * @param string      $partial_id   Partial ID.
       
  1148 	 * @return array Partial args.
       
  1149 	 */
       
  1150 	public function customize_dynamic_partial_args( $partial_args, $partial_id ) {
       
  1151 
       
  1152 		if ( preg_match( '/^nav_menu_instance\[[0-9a-f]{32}\]$/', $partial_id ) ) {
       
  1153 			if ( false === $partial_args ) {
       
  1154 				$partial_args = array();
       
  1155 			}
       
  1156 			$partial_args = array_merge(
       
  1157 				$partial_args,
       
  1158 				array(
       
  1159 					'type'                => 'nav_menu_instance',
       
  1160 					'render_callback'     => array( $this, 'render_nav_menu_partial' ),
       
  1161 					'container_inclusive' => true,
       
  1162 					'settings'            => array(), // Empty because the nav menu instance may relate to a menu or a location.
       
  1163 					'capability'          => 'edit_theme_options',
       
  1164 				)
       
  1165 			);
       
  1166 		}
       
  1167 
       
  1168 		return $partial_args;
       
  1169 	}
       
  1170 
       
  1171 	/**
       
  1172 	 * Add hooks for the Customizer preview.
       
  1173 	 *
       
  1174 	 * @since 4.3.0
       
  1175 	 */
       
  1176 	public function customize_preview_init() {
       
  1177 		add_action( 'wp_enqueue_scripts', array( $this, 'customize_preview_enqueue_deps' ) );
       
  1178 		add_filter( 'wp_nav_menu_args', array( $this, 'filter_wp_nav_menu_args' ), 1000 );
       
  1179 		add_filter( 'wp_nav_menu', array( $this, 'filter_wp_nav_menu' ), 10, 2 );
       
  1180 		add_filter( 'wp_footer', array( $this, 'export_preview_data' ), 1 );
       
  1181 		add_filter( 'customize_render_partials_response', array( $this, 'export_partial_rendered_nav_menu_instances' ) );
       
  1182 	}
       
  1183 
       
  1184 	/**
       
  1185 	 * Make the auto-draft status protected so that it can be queried.
       
  1186 	 *
       
  1187 	 * @since 4.7.0
       
  1188 	 *
       
  1189 	 * @global array $wp_post_statuses List of post statuses.
       
  1190 	 */
       
  1191 	public function make_auto_draft_status_previewable() {
       
  1192 		global $wp_post_statuses;
       
  1193 		$wp_post_statuses['auto-draft']->protected = true;
       
  1194 	}
       
  1195 
       
  1196 	/**
       
  1197 	 * Sanitize post IDs for posts created for nav menu items to be published.
       
  1198 	 *
       
  1199 	 * @since 4.7.0
       
  1200 	 *
       
  1201 	 * @param array $value Post IDs.
       
  1202 	 * @returns array Post IDs.
       
  1203 	 */
       
  1204 	public function sanitize_nav_menus_created_posts( $value ) {
       
  1205 		$post_ids = array();
       
  1206 		foreach ( wp_parse_id_list( $value ) as $post_id ) {
       
  1207 			if ( empty( $post_id ) ) {
       
  1208 				continue;
       
  1209 			}
       
  1210 			$post = get_post( $post_id );
       
  1211 			if ( 'auto-draft' !== $post->post_status && 'draft' !== $post->post_status ) {
       
  1212 				continue;
       
  1213 			}
       
  1214 			$post_type_obj = get_post_type_object( $post->post_type );
       
  1215 			if ( ! $post_type_obj ) {
       
  1216 				continue;
       
  1217 			}
       
  1218 			if ( ! current_user_can( $post_type_obj->cap->publish_posts ) || ! current_user_can( $post_type_obj->cap->edit_post, $post_id ) ) {
       
  1219 				continue;
       
  1220 			}
       
  1221 			$post_ids[] = $post->ID;
       
  1222 		}
       
  1223 		return $post_ids;
       
  1224 	}
       
  1225 
       
  1226 	/**
       
  1227 	 * Publish the auto-draft posts that were created for nav menu items.
       
  1228 	 *
       
  1229 	 * The post IDs will have been sanitized by already by
       
  1230 	 * `WP_Customize_Nav_Menu_Items::sanitize_nav_menus_created_posts()` to
       
  1231 	 * remove any post IDs for which the user cannot publish or for which the
       
  1232 	 * post is not an auto-draft.
       
  1233 	 *
       
  1234 	 * @since 4.7.0
       
  1235 	 *
       
  1236 	 * @param WP_Customize_Setting $setting Customizer setting object.
       
  1237 	 */
       
  1238 	public function save_nav_menus_created_posts( $setting ) {
       
  1239 		$post_ids = $setting->post_value();
       
  1240 		if ( ! empty( $post_ids ) ) {
       
  1241 			foreach ( $post_ids as $post_id ) {
       
  1242 
       
  1243 				// Prevent overriding the status that a user may have prematurely updated the post to.
       
  1244 				$current_status = get_post_status( $post_id );
       
  1245 				if ( 'auto-draft' !== $current_status && 'draft' !== $current_status ) {
       
  1246 					continue;
       
  1247 				}
       
  1248 
       
  1249 				$target_status = 'attachment' === get_post_type( $post_id ) ? 'inherit' : 'publish';
       
  1250 				$args = array(
       
  1251 					'ID' => $post_id,
       
  1252 					'post_status' => $target_status,
       
  1253 				);
       
  1254 				$post_name = get_post_meta( $post_id, '_customize_draft_post_name', true );
       
  1255 				if ( $post_name ) {
       
  1256 					$args['post_name'] = $post_name;
       
  1257 				}
       
  1258 
       
  1259 				// Note that wp_publish_post() cannot be used because unique slugs need to be assigned.
       
  1260 				wp_update_post( wp_slash( $args ) );
       
  1261 
       
  1262 				delete_post_meta( $post_id, '_customize_draft_post_name' );
       
  1263 			}
       
  1264 		}
       
  1265 	}
       
  1266 
       
  1267 	/**
       
  1268 	 * Keep track of the arguments that are being passed to wp_nav_menu().
       
  1269 	 *
       
  1270 	 * @since 4.3.0
       
  1271 	 * @see wp_nav_menu()
       
  1272 	 * @see WP_Customize_Widgets_Partial_Refresh::filter_dynamic_sidebar_params()
       
  1273 	 *
       
  1274 	 * @param array $args An array containing wp_nav_menu() arguments.
       
  1275 	 * @return array Arguments.
       
  1276 	 */
       
  1277 	public function filter_wp_nav_menu_args( $args ) {
       
  1278 		/*
       
  1279 		 * The following conditions determine whether or not this instance of
       
  1280 		 * wp_nav_menu() can use selective refreshed. A wp_nav_menu() can be
       
  1281 		 * selective refreshed if...
       
  1282 		 */
       
  1283 		$can_partial_refresh = (
       
  1284 			// ...if wp_nav_menu() is directly echoing out the menu (and thus isn't manipulating the string after generated),
       
  1285 			! empty( $args['echo'] )
       
  1286 			&&
       
  1287 			// ...and if the fallback_cb can be serialized to JSON, since it will be included in the placement context data,
       
  1288 			( empty( $args['fallback_cb'] ) || is_string( $args['fallback_cb'] ) )
       
  1289 			&&
       
  1290 			// ...and if the walker can also be serialized to JSON, since it will be included in the placement context data as well,
       
  1291 			( empty( $args['walker'] ) || is_string( $args['walker'] ) )
       
  1292 			// ...and if it has a theme location assigned or an assigned menu to display,
       
  1293 			&& (
       
  1294 				! empty( $args['theme_location'] )
       
  1295 				||
       
  1296 				( ! empty( $args['menu'] ) && ( is_numeric( $args['menu'] ) || is_object( $args['menu'] ) ) )
       
  1297 			)
       
  1298 			&&
       
  1299 			// ...and if the nav menu would be rendered with a wrapper container element (upon which to attach data-* attributes).
       
  1300 			(
       
  1301 				! empty( $args['container'] )
       
  1302 				||
       
  1303 				( isset( $args['items_wrap'] ) && '<' === substr( $args['items_wrap'], 0, 1 ) )
       
  1304 			)
       
  1305 		);
       
  1306 		$args['can_partial_refresh'] = $can_partial_refresh;
       
  1307 
       
  1308 		$exported_args = $args;
       
  1309 
       
  1310 		// Empty out args which may not be JSON-serializable.
       
  1311 		if ( ! $can_partial_refresh ) {
       
  1312 			$exported_args['fallback_cb'] = '';
       
  1313 			$exported_args['walker'] = '';
       
  1314 		}
       
  1315 
       
  1316 		/*
       
  1317 		 * Replace object menu arg with a term_id menu arg, as this exports better
       
  1318 		 * to JS and is easier to compare hashes.
       
  1319 		 */
       
  1320 		if ( ! empty( $exported_args['menu'] ) && is_object( $exported_args['menu'] ) ) {
       
  1321 			$exported_args['menu'] = $exported_args['menu']->term_id;
       
  1322 		}
       
  1323 
       
  1324 		ksort( $exported_args );
       
  1325 		$exported_args['args_hmac'] = $this->hash_nav_menu_args( $exported_args );
       
  1326 
       
  1327 		$args['customize_preview_nav_menus_args'] = $exported_args;
       
  1328 		$this->preview_nav_menu_instance_args[ $exported_args['args_hmac'] ] = $exported_args;
       
  1329 		return $args;
       
  1330 	}
       
  1331 
       
  1332 	/**
       
  1333 	 * Prepares wp_nav_menu() calls for partial refresh.
       
  1334 	 *
       
  1335 	 * Injects attributes into container element.
       
  1336 	 *
       
  1337 	 * @since 4.3.0
       
  1338 	 *
       
  1339 	 * @see wp_nav_menu()
       
  1340 	 *
       
  1341 	 * @param string $nav_menu_content The HTML content for the navigation menu.
       
  1342 	 * @param object $args             An object containing wp_nav_menu() arguments.
       
  1343 	 * @return string Nav menu HTML with selective refresh attributes added if partial can be refreshed.
       
  1344 	 */
       
  1345 	public function filter_wp_nav_menu( $nav_menu_content, $args ) {
       
  1346 		if ( isset( $args->customize_preview_nav_menus_args['can_partial_refresh'] ) && $args->customize_preview_nav_menus_args['can_partial_refresh'] ) {
       
  1347 			$attributes = sprintf( ' data-customize-partial-id="%s"', esc_attr( 'nav_menu_instance[' . $args->customize_preview_nav_menus_args['args_hmac'] . ']' ) );
       
  1348 			$attributes .= ' data-customize-partial-type="nav_menu_instance"';
       
  1349 			$attributes .= sprintf( ' data-customize-partial-placement-context="%s"', esc_attr( wp_json_encode( $args->customize_preview_nav_menus_args ) ) );
       
  1350 			$nav_menu_content = preg_replace( '#^(<\w+)#', '$1 ' . str_replace( '\\', '\\\\', $attributes ), $nav_menu_content, 1 );
       
  1351 		}
       
  1352 		return $nav_menu_content;
       
  1353 	}
       
  1354 
       
  1355 	/**
       
  1356 	 * Hashes (hmac) the nav menu arguments to ensure they are not tampered with when
       
  1357 	 * submitted in the Ajax request.
       
  1358 	 *
       
  1359 	 * Note that the array is expected to be pre-sorted.
       
  1360 	 *
       
  1361 	 * @since 4.3.0
       
  1362 	 *
       
  1363 	 * @param array $args The arguments to hash.
       
  1364 	 * @return string Hashed nav menu arguments.
       
  1365 	 */
       
  1366 	public function hash_nav_menu_args( $args ) {
       
  1367 		return wp_hash( serialize( $args ) );
       
  1368 	}
       
  1369 
       
  1370 	/**
       
  1371 	 * Enqueue scripts for the Customizer preview.
       
  1372 	 *
       
  1373 	 * @since 4.3.0
       
  1374 	 */
       
  1375 	public function customize_preview_enqueue_deps() {
       
  1376 		wp_enqueue_script( 'customize-preview-nav-menus' ); // Note that we have overridden this.
       
  1377 	}
       
  1378 
       
  1379 	/**
       
  1380 	 * Exports data from PHP to JS.
       
  1381 	 *
       
  1382 	 * @since 4.3.0
       
  1383 	 */
       
  1384 	public function export_preview_data() {
       
  1385 
       
  1386 		// Why not wp_localize_script? Because we're not localizing, and it forces values into strings.
       
  1387 		$exports = array(
       
  1388 			'navMenuInstanceArgs' => $this->preview_nav_menu_instance_args,
       
  1389 		);
       
  1390 		printf( '<script>var _wpCustomizePreviewNavMenusExports = %s;</script>', wp_json_encode( $exports ) );
       
  1391 	}
       
  1392 
       
  1393 	/**
       
  1394 	 * Export any wp_nav_menu() calls during the rendering of any partials.
       
  1395 	 *
       
  1396 	 * @since 4.5.0
       
  1397 	 *
       
  1398 	 * @param array $response Response.
       
  1399 	 * @return array Response.
       
  1400 	 */
       
  1401 	public function export_partial_rendered_nav_menu_instances( $response ) {
       
  1402 		$response['nav_menu_instance_args'] = $this->preview_nav_menu_instance_args;
       
  1403 		return $response;
       
  1404 	}
       
  1405 
       
  1406 	/**
       
  1407 	 * Render a specific menu via wp_nav_menu() using the supplied arguments.
       
  1408 	 *
       
  1409 	 * @since 4.3.0
       
  1410 	 *
       
  1411 	 * @see wp_nav_menu()
       
  1412 	 *
       
  1413 	 * @param WP_Customize_Partial $partial       Partial.
       
  1414 	 * @param array                $nav_menu_args Nav menu args supplied as container context.
       
  1415 	 * @return string|false
       
  1416 	 */
       
  1417 	public function render_nav_menu_partial( $partial, $nav_menu_args ) {
       
  1418 		unset( $partial );
       
  1419 
       
  1420 		if ( ! isset( $nav_menu_args['args_hmac'] ) ) {
       
  1421 			// Error: missing_args_hmac.
       
  1422 			return false;
       
  1423 		}
       
  1424 
       
  1425 		$nav_menu_args_hmac = $nav_menu_args['args_hmac'];
       
  1426 		unset( $nav_menu_args['args_hmac'] );
       
  1427 
       
  1428 		ksort( $nav_menu_args );
       
  1429 		if ( ! hash_equals( $this->hash_nav_menu_args( $nav_menu_args ), $nav_menu_args_hmac ) ) {
       
  1430 			// Error: args_hmac_mismatch.
       
  1431 			return false;
       
  1432 		}
       
  1433 
       
  1434 		ob_start();
       
  1435 		wp_nav_menu( $nav_menu_args );
       
  1436 		$content = ob_get_clean();
       
  1437 
       
  1438 		return $content;
       
  1439 	}
       
  1440 }