wp/wp-includes/blocks/navigation.php
changeset 21 48c4eec2b7e6
parent 19 3d72ae0968f4
child 22 8c2e4d02f4ef
equal deleted inserted replaced
20:7b1b88e27a20 21:48c4eec2b7e6
     2 /**
     2 /**
     3  * Server-side rendering of the `core/navigation` block.
     3  * Server-side rendering of the `core/navigation` block.
     4  *
     4  *
     5  * @package WordPress
     5  * @package WordPress
     6  */
     6  */
       
     7 
       
     8 /**
       
     9  * Helper functions used to render the navigation block.
       
    10  *
       
    11  * @since 6.5.0
       
    12  */
       
    13 class WP_Navigation_Block_Renderer {
       
    14 
       
    15 	/**
       
    16 	 * Used to determine whether or not a navigation has submenus.
       
    17 	 *
       
    18 	 * @since 6.5.0
       
    19 	 */
       
    20 	private static $has_submenus = false;
       
    21 
       
    22 	/**
       
    23 	 * Used to determine which blocks need an <li> wrapper.
       
    24 	 *
       
    25 	 * @since 6.5.0
       
    26 	 *
       
    27 	 * @var array
       
    28 	 */
       
    29 	private static $needs_list_item_wrapper = array(
       
    30 		'core/site-title',
       
    31 		'core/site-logo',
       
    32 		'core/social-links',
       
    33 	);
       
    34 
       
    35 	/**
       
    36 	 * Keeps track of all the navigation names that have been seen.
       
    37 	 *
       
    38 	 * @since 6.5.0
       
    39 	 *
       
    40 	 * @var array
       
    41 	 */
       
    42 	private static $seen_menu_names = array();
       
    43 
       
    44 	/**
       
    45 	 * Returns whether or not this is responsive navigation.
       
    46 	 *
       
    47 	 * @since 6.5.0
       
    48 	 *
       
    49 	 * @param array $attributes The block attributes.
       
    50 	 * @return bool Returns whether or not this is responsive navigation.
       
    51 	 */
       
    52 	private static function is_responsive( $attributes ) {
       
    53 		/**
       
    54 		 * This is for backwards compatibility after the `isResponsive` attribute was been removed.
       
    55 		 */
       
    56 
       
    57 		$has_old_responsive_attribute = ! empty( $attributes['isResponsive'] ) && $attributes['isResponsive'];
       
    58 		return isset( $attributes['overlayMenu'] ) && 'never' !== $attributes['overlayMenu'] || $has_old_responsive_attribute;
       
    59 	}
       
    60 
       
    61 	/**
       
    62 	 * Returns whether or not a navigation has a submenu.
       
    63 	 *
       
    64 	 * @since 6.5.0
       
    65 	 *
       
    66 	 * @param WP_Block_List $inner_blocks The list of inner blocks.
       
    67 	 * @return bool Returns whether or not a navigation has a submenu and also sets the member variable.
       
    68 	 */
       
    69 	private static function has_submenus( $inner_blocks ) {
       
    70 		if ( true === static::$has_submenus ) {
       
    71 			return static::$has_submenus;
       
    72 		}
       
    73 
       
    74 		foreach ( $inner_blocks as $inner_block ) {
       
    75 			// If this is a page list then work out if any of the pages have children.
       
    76 			if ( 'core/page-list' === $inner_block->name ) {
       
    77 				$all_pages = get_pages(
       
    78 					array(
       
    79 						'sort_column' => 'menu_order,post_title',
       
    80 						'order'       => 'asc',
       
    81 					)
       
    82 				);
       
    83 				foreach ( (array) $all_pages as $page ) {
       
    84 					if ( $page->post_parent ) {
       
    85 						static::$has_submenus = true;
       
    86 						break;
       
    87 					}
       
    88 				}
       
    89 			}
       
    90 			// If this is a navigation submenu then we know we have submenus.
       
    91 			if ( 'core/navigation-submenu' === $inner_block->name ) {
       
    92 				static::$has_submenus = true;
       
    93 				break;
       
    94 			}
       
    95 		}
       
    96 
       
    97 		return static::$has_submenus;
       
    98 	}
       
    99 
       
   100 	/**
       
   101 	 * Determine whether the navigation blocks is interactive.
       
   102 	 *
       
   103 	 * @since 6.5.0
       
   104 	 *
       
   105 	 * @param array         $attributes   The block attributes.
       
   106 	 * @param WP_Block_List $inner_blocks The list of inner blocks.
       
   107 	 * @return bool Returns whether or not to load the view script.
       
   108 	 */
       
   109 	private static function is_interactive( $attributes, $inner_blocks ) {
       
   110 		$has_submenus       = static::has_submenus( $inner_blocks );
       
   111 		$is_responsive_menu = static::is_responsive( $attributes );
       
   112 		return ( $has_submenus && ( $attributes['openSubmenusOnClick'] || $attributes['showSubmenuIcon'] ) ) || $is_responsive_menu;
       
   113 	}
       
   114 
       
   115 	/**
       
   116 	 * Returns whether or not a block needs a list item wrapper.
       
   117 	 *
       
   118 	 * @since 6.5.0
       
   119 	 *
       
   120 	 * @param WP_Block $block The block.
       
   121 	 * @return bool Returns whether or not a block needs a list item wrapper.
       
   122 	 */
       
   123 	private static function does_block_need_a_list_item_wrapper( $block ) {
       
   124 
       
   125 		/**
       
   126 		 * Filter the list of blocks that need a list item wrapper.
       
   127 		 *
       
   128 		 * Affords the ability to customize which blocks need a list item wrapper when rendered
       
   129 		 * within a core/navigation block.
       
   130 		 * This is useful for blocks that are not list items but should be wrapped in a list
       
   131 		 * item when used as a child of a navigation block.
       
   132 		 *
       
   133 		 * @since 6.5.0
       
   134 		 *
       
   135 		 * @param array $needs_list_item_wrapper The list of blocks that need a list item wrapper.
       
   136 		 * @return array The list of blocks that need a list item wrapper.
       
   137 		 */
       
   138 		$needs_list_item_wrapper = apply_filters( 'block_core_navigation_listable_blocks', static::$needs_list_item_wrapper );
       
   139 
       
   140 		return in_array( $block->name, $needs_list_item_wrapper, true );
       
   141 	}
       
   142 
       
   143 	/**
       
   144 	 * Returns the markup for a single inner block.
       
   145 	 *
       
   146 	 * @since 6.5.0
       
   147 	 *
       
   148 	 * @param WP_Block $inner_block The inner block.
       
   149 	 * @return string Returns the markup for a single inner block.
       
   150 	 */
       
   151 	private static function get_markup_for_inner_block( $inner_block ) {
       
   152 		$inner_block_content = $inner_block->render();
       
   153 		if ( ! empty( $inner_block_content ) ) {
       
   154 			if ( static::does_block_need_a_list_item_wrapper( $inner_block ) ) {
       
   155 				return '<li class="wp-block-navigation-item">' . $inner_block_content . '</li>';
       
   156 			}
       
   157 		}
       
   158 
       
   159 		return $inner_block_content;
       
   160 	}
       
   161 
       
   162 	/**
       
   163 	 * Returns the html for the inner blocks of the navigation block.
       
   164 	 *
       
   165 	 * @since 6.5.0
       
   166 	 *
       
   167 	 * @param array         $attributes   The block attributes.
       
   168 	 * @param WP_Block_List $inner_blocks The list of inner blocks.
       
   169 	 * @return string Returns the html for the inner blocks of the navigation block.
       
   170 	 */
       
   171 	private static function get_inner_blocks_html( $attributes, $inner_blocks ) {
       
   172 		$has_submenus   = static::has_submenus( $inner_blocks );
       
   173 		$is_interactive = static::is_interactive( $attributes, $inner_blocks );
       
   174 
       
   175 		$style                = static::get_styles( $attributes );
       
   176 		$class                = static::get_classes( $attributes );
       
   177 		$container_attributes = get_block_wrapper_attributes(
       
   178 			array(
       
   179 				'class' => 'wp-block-navigation__container ' . $class,
       
   180 				'style' => $style,
       
   181 			)
       
   182 		);
       
   183 
       
   184 		$inner_blocks_html = '';
       
   185 		$is_list_open      = false;
       
   186 
       
   187 		foreach ( $inner_blocks as $inner_block ) {
       
   188 			$inner_block_markup = static::get_markup_for_inner_block( $inner_block );
       
   189 			$p                  = new WP_HTML_Tag_Processor( $inner_block_markup );
       
   190 			$is_list_item       = $p->next_tag( 'LI' );
       
   191 
       
   192 			if ( $is_list_item && ! $is_list_open ) {
       
   193 				$is_list_open       = true;
       
   194 				$inner_blocks_html .= sprintf(
       
   195 					'<ul %1$s>',
       
   196 					$container_attributes
       
   197 				);
       
   198 			}
       
   199 
       
   200 			if ( ! $is_list_item && $is_list_open ) {
       
   201 				$is_list_open       = false;
       
   202 				$inner_blocks_html .= '</ul>';
       
   203 			}
       
   204 
       
   205 			$inner_blocks_html .= $inner_block_markup;
       
   206 		}
       
   207 
       
   208 		if ( $is_list_open ) {
       
   209 			$inner_blocks_html .= '</ul>';
       
   210 		}
       
   211 
       
   212 		// Add directives to the submenu if needed.
       
   213 		if ( $has_submenus && $is_interactive ) {
       
   214 			$tags              = new WP_HTML_Tag_Processor( $inner_blocks_html );
       
   215 			$inner_blocks_html = block_core_navigation_add_directives_to_submenu( $tags, $attributes );
       
   216 		}
       
   217 
       
   218 		return $inner_blocks_html;
       
   219 	}
       
   220 
       
   221 	/**
       
   222 	 * Gets the inner blocks for the navigation block from the navigation post.
       
   223 	 *
       
   224 	 * @since 6.5.0
       
   225 	 *
       
   226 	 * @param array $attributes The block attributes.
       
   227 	 * @return WP_Block_List Returns the inner blocks for the navigation block.
       
   228 	 */
       
   229 	private static function get_inner_blocks_from_navigation_post( $attributes ) {
       
   230 		$navigation_post = get_post( $attributes['ref'] );
       
   231 		if ( ! isset( $navigation_post ) ) {
       
   232 			return new WP_Block_List( array(), $attributes );
       
   233 		}
       
   234 
       
   235 		// Only published posts are valid. If this is changed then a corresponding change
       
   236 		// must also be implemented in `use-navigation-menu.js`.
       
   237 		if ( 'publish' === $navigation_post->post_status ) {
       
   238 			$parsed_blocks = parse_blocks( $navigation_post->post_content );
       
   239 
       
   240 			// 'parse_blocks' includes a null block with '\n\n' as the content when
       
   241 			// it encounters whitespace. This code strips it.
       
   242 			$blocks = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );
       
   243 
       
   244 			if ( function_exists( 'set_ignored_hooked_blocks_metadata' ) ) {
       
   245 				// Run Block Hooks algorithm to inject hooked blocks.
       
   246 				$markup         = block_core_navigation_insert_hooked_blocks( $blocks, $navigation_post );
       
   247 				$root_nav_block = parse_blocks( $markup )[0];
       
   248 
       
   249 				$blocks = isset( $root_nav_block['innerBlocks'] ) ? $root_nav_block['innerBlocks'] : $blocks;
       
   250 			}
       
   251 
       
   252 			// TODO - this uses the full navigation block attributes for the
       
   253 			// context which could be refined.
       
   254 			return new WP_Block_List( $blocks, $attributes );
       
   255 		}
       
   256 	}
       
   257 
       
   258 	/**
       
   259 	 * Gets the inner blocks for the navigation block from the fallback.
       
   260 	 *
       
   261 	 * @since 6.5.0
       
   262 	 *
       
   263 	 * @param array $attributes The block attributes.
       
   264 	 * @return WP_Block_List Returns the inner blocks for the navigation block.
       
   265 	 */
       
   266 	private static function get_inner_blocks_from_fallback( $attributes ) {
       
   267 		$fallback_blocks = block_core_navigation_get_fallback_blocks();
       
   268 
       
   269 		// Fallback my have been filtered so do basic test for validity.
       
   270 		if ( empty( $fallback_blocks ) || ! is_array( $fallback_blocks ) ) {
       
   271 			return new WP_Block_List( array(), $attributes );
       
   272 		}
       
   273 
       
   274 		return new WP_Block_List( $fallback_blocks, $attributes );
       
   275 	}
       
   276 
       
   277 	/**
       
   278 	 * Gets the inner blocks for the navigation block.
       
   279 	 *
       
   280 	 * @since 6.5.0
       
   281 	 *
       
   282 	 * @param array    $attributes The block attributes.
       
   283 	 * @param WP_Block $block The parsed block.
       
   284 	 * @return WP_Block_List Returns the inner blocks for the navigation block.
       
   285 	 */
       
   286 	private static function get_inner_blocks( $attributes, $block ) {
       
   287 		$inner_blocks = $block->inner_blocks;
       
   288 
       
   289 		// Ensure that blocks saved with the legacy ref attribute name (navigationMenuId) continue to render.
       
   290 		if ( array_key_exists( 'navigationMenuId', $attributes ) ) {
       
   291 			$attributes['ref'] = $attributes['navigationMenuId'];
       
   292 		}
       
   293 
       
   294 		// If:
       
   295 		// - the gutenberg plugin is active
       
   296 		// - `__unstableLocation` is defined
       
   297 		// - we have menu items at the defined location
       
   298 		// - we don't have a relationship to a `wp_navigation` Post (via `ref`).
       
   299 		// ...then create inner blocks from the classic menu assigned to that location.
       
   300 		if (
       
   301 			defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN &&
       
   302 			array_key_exists( '__unstableLocation', $attributes ) &&
       
   303 			! array_key_exists( 'ref', $attributes ) &&
       
   304 			! empty( block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] ) )
       
   305 		) {
       
   306 			$inner_blocks = block_core_navigation_get_inner_blocks_from_unstable_location( $attributes );
       
   307 		}
       
   308 
       
   309 		// Load inner blocks from the navigation post.
       
   310 		if ( array_key_exists( 'ref', $attributes ) ) {
       
   311 			$inner_blocks = static::get_inner_blocks_from_navigation_post( $attributes );
       
   312 		}
       
   313 
       
   314 		// If there are no inner blocks then fallback to rendering an appropriate fallback.
       
   315 		if ( empty( $inner_blocks ) ) {
       
   316 			$inner_blocks = static::get_inner_blocks_from_fallback( $attributes );
       
   317 		}
       
   318 
       
   319 		/**
       
   320 		 * Filter navigation block $inner_blocks.
       
   321 		 * Allows modification of a navigation block menu items.
       
   322 		 *
       
   323 		 * @since 6.1.0
       
   324 		 *
       
   325 		 * @param \WP_Block_List $inner_blocks
       
   326 		 */
       
   327 		$inner_blocks = apply_filters( 'block_core_navigation_render_inner_blocks', $inner_blocks );
       
   328 
       
   329 		$post_ids = block_core_navigation_get_post_ids( $inner_blocks );
       
   330 		if ( $post_ids ) {
       
   331 			_prime_post_caches( $post_ids, false, false );
       
   332 		}
       
   333 
       
   334 		return $inner_blocks;
       
   335 	}
       
   336 
       
   337 	/**
       
   338 	 * Gets the name of the current navigation, if it has one.
       
   339 	 *
       
   340 	 * @since 6.5.0
       
   341 	 *
       
   342 	 * @param array $attributes The block attributes.
       
   343 	 * @return string Returns the name of the navigation.
       
   344 	 */
       
   345 	private static function get_navigation_name( $attributes ) {
       
   346 
       
   347 		$navigation_name = $attributes['ariaLabel'] ?? '';
       
   348 
       
   349 		// Load the navigation post.
       
   350 		if ( array_key_exists( 'ref', $attributes ) ) {
       
   351 			$navigation_post = get_post( $attributes['ref'] );
       
   352 			if ( ! isset( $navigation_post ) ) {
       
   353 				return $navigation_name;
       
   354 			}
       
   355 
       
   356 			// Only published posts are valid. If this is changed then a corresponding change
       
   357 			// must also be implemented in `use-navigation-menu.js`.
       
   358 			if ( 'publish' === $navigation_post->post_status ) {
       
   359 				$navigation_name = $navigation_post->post_title;
       
   360 
       
   361 				// This is used to count the number of times a navigation name has been seen,
       
   362 				// so that we can ensure every navigation has a unique id.
       
   363 				if ( isset( static::$seen_menu_names[ $navigation_name ] ) ) {
       
   364 					++static::$seen_menu_names[ $navigation_name ];
       
   365 				} else {
       
   366 					static::$seen_menu_names[ $navigation_name ] = 1;
       
   367 				}
       
   368 			}
       
   369 		}
       
   370 
       
   371 		return $navigation_name;
       
   372 	}
       
   373 
       
   374 	/**
       
   375 	 * Returns the layout class for the navigation block.
       
   376 	 *
       
   377 	 * @since 6.5.0
       
   378 	 *
       
   379 	 * @param array $attributes The block attributes.
       
   380 	 * @return string Returns the layout class for the navigation block.
       
   381 	 */
       
   382 	private static function get_layout_class( $attributes ) {
       
   383 		$layout_justification = array(
       
   384 			'left'          => 'items-justified-left',
       
   385 			'right'         => 'items-justified-right',
       
   386 			'center'        => 'items-justified-center',
       
   387 			'space-between' => 'items-justified-space-between',
       
   388 		);
       
   389 
       
   390 		$layout_class = '';
       
   391 		if (
       
   392 			isset( $attributes['layout']['justifyContent'] ) &&
       
   393 			isset( $layout_justification[ $attributes['layout']['justifyContent'] ] )
       
   394 		) {
       
   395 			$layout_class .= $layout_justification[ $attributes['layout']['justifyContent'] ];
       
   396 		}
       
   397 		if ( isset( $attributes['layout']['orientation'] ) && 'vertical' === $attributes['layout']['orientation'] ) {
       
   398 			$layout_class .= ' is-vertical';
       
   399 		}
       
   400 
       
   401 		if ( isset( $attributes['layout']['flexWrap'] ) && 'nowrap' === $attributes['layout']['flexWrap'] ) {
       
   402 			$layout_class .= ' no-wrap';
       
   403 		}
       
   404 		return $layout_class;
       
   405 	}
       
   406 
       
   407 	/**
       
   408 	 * Return classes for the navigation block.
       
   409 	 *
       
   410 	 * @since 6.5.0
       
   411 	 *
       
   412 	 * @param array $attributes The block attributes.
       
   413 	 * @return string Returns the classes for the navigation block.
       
   414 	 */
       
   415 	private static function get_classes( $attributes ) {
       
   416 		// Restore legacy classnames for submenu positioning.
       
   417 		$layout_class       = static::get_layout_class( $attributes );
       
   418 		$colors             = block_core_navigation_build_css_colors( $attributes );
       
   419 		$font_sizes         = block_core_navigation_build_css_font_sizes( $attributes );
       
   420 		$is_responsive_menu = static::is_responsive( $attributes );
       
   421 
       
   422 		// Manually add block support text decoration as CSS class.
       
   423 		$text_decoration       = $attributes['style']['typography']['textDecoration'] ?? null;
       
   424 		$text_decoration_class = sprintf( 'has-text-decoration-%s', $text_decoration );
       
   425 
       
   426 		$classes = array_merge(
       
   427 			$colors['css_classes'],
       
   428 			$font_sizes['css_classes'],
       
   429 			$is_responsive_menu ? array( 'is-responsive' ) : array(),
       
   430 			$layout_class ? array( $layout_class ) : array(),
       
   431 			$text_decoration ? array( $text_decoration_class ) : array()
       
   432 		);
       
   433 		return implode( ' ', $classes );
       
   434 	}
       
   435 
       
   436 	/**
       
   437 	 * Get styles for the navigation block.
       
   438 	 *
       
   439 	 * @since 6.5.0
       
   440 	 *
       
   441 	 * @param array $attributes The block attributes.
       
   442 	 * @return string Returns the styles for the navigation block.
       
   443 	 */
       
   444 	private static function get_styles( $attributes ) {
       
   445 		$colors       = block_core_navigation_build_css_colors( $attributes );
       
   446 		$font_sizes   = block_core_navigation_build_css_font_sizes( $attributes );
       
   447 		$block_styles = isset( $attributes['styles'] ) ? $attributes['styles'] : '';
       
   448 		return $block_styles . $colors['inline_styles'] . $font_sizes['inline_styles'];
       
   449 	}
       
   450 
       
   451 	/**
       
   452 	 * Get the responsive container markup
       
   453 	 *
       
   454 	 * @since 6.5.0
       
   455 	 *
       
   456 	 * @param array         $attributes The block attributes.
       
   457 	 * @param WP_Block_List $inner_blocks The list of inner blocks.
       
   458 	 * @param string        $inner_blocks_html The markup for the inner blocks.
       
   459 	 * @return string Returns the container markup.
       
   460 	 */
       
   461 	private static function get_responsive_container_markup( $attributes, $inner_blocks, $inner_blocks_html ) {
       
   462 		$is_interactive  = static::is_interactive( $attributes, $inner_blocks );
       
   463 		$colors          = block_core_navigation_build_css_colors( $attributes );
       
   464 		$modal_unique_id = wp_unique_id( 'modal-' );
       
   465 
       
   466 		$is_hidden_by_default = isset( $attributes['overlayMenu'] ) && 'always' === $attributes['overlayMenu'];
       
   467 
       
   468 		$responsive_container_classes = array(
       
   469 			'wp-block-navigation__responsive-container',
       
   470 			$is_hidden_by_default ? 'hidden-by-default' : '',
       
   471 			implode( ' ', $colors['overlay_css_classes'] ),
       
   472 		);
       
   473 		$open_button_classes          = array(
       
   474 			'wp-block-navigation__responsive-container-open',
       
   475 			$is_hidden_by_default ? 'always-shown' : '',
       
   476 		);
       
   477 
       
   478 		$should_display_icon_label = isset( $attributes['hasIcon'] ) && true === $attributes['hasIcon'];
       
   479 		$toggle_button_icon        = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><rect x="4" y="7.5" width="16" height="1.5" /><rect x="4" y="15" width="16" height="1.5" /></svg>';
       
   480 		if ( isset( $attributes['icon'] ) ) {
       
   481 			if ( 'menu' === $attributes['icon'] ) {
       
   482 				$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M5 5v1.5h14V5H5zm0 7.8h14v-1.5H5v1.5zM5 19h14v-1.5H5V19z" /></svg>';
       
   483 			}
       
   484 		}
       
   485 		$toggle_button_content       = $should_display_icon_label ? $toggle_button_icon : __( 'Menu' );
       
   486 		$toggle_close_button_icon    = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M13 11.8l6.1-6.3-1-1-6.1 6.2-6.1-6.2-1 1 6.1 6.3-6.5 6.7 1 1 6.5-6.6 6.5 6.6 1-1z"></path></svg>';
       
   487 		$toggle_close_button_content = $should_display_icon_label ? $toggle_close_button_icon : __( 'Close' );
       
   488 		$toggle_aria_label_open      = $should_display_icon_label ? 'aria-label="' . __( 'Open menu' ) . '"' : ''; // Open button label.
       
   489 		$toggle_aria_label_close     = $should_display_icon_label ? 'aria-label="' . __( 'Close menu' ) . '"' : ''; // Close button label.
       
   490 
       
   491 		// Add Interactivity API directives to the markup if needed.
       
   492 		$open_button_directives          = '';
       
   493 		$responsive_container_directives = '';
       
   494 		$responsive_dialog_directives    = '';
       
   495 		$close_button_directives         = '';
       
   496 		if ( $is_interactive ) {
       
   497 			$open_button_directives                  = '
       
   498 				data-wp-on-async--click="actions.openMenuOnClick"
       
   499 				data-wp-on--keydown="actions.handleMenuKeydown"
       
   500 			';
       
   501 			$responsive_container_directives         = '
       
   502 				data-wp-class--has-modal-open="state.isMenuOpen"
       
   503 				data-wp-class--is-menu-open="state.isMenuOpen"
       
   504 				data-wp-watch="callbacks.initMenu"
       
   505 				data-wp-on--keydown="actions.handleMenuKeydown"
       
   506 				data-wp-on-async--focusout="actions.handleMenuFocusout"
       
   507 				tabindex="-1"
       
   508 			';
       
   509 			$responsive_dialog_directives            = '
       
   510 				data-wp-bind--aria-modal="state.ariaModal"
       
   511 				data-wp-bind--aria-label="state.ariaLabel"
       
   512 				data-wp-bind--role="state.roleAttribute"
       
   513 			';
       
   514 			$close_button_directives                 = '
       
   515 				data-wp-on-async--click="actions.closeMenuOnClick"
       
   516 			';
       
   517 			$responsive_container_content_directives = '
       
   518 				data-wp-watch="callbacks.focusFirstElement"
       
   519 			';
       
   520 		}
       
   521 
       
   522 		$overlay_inline_styles = esc_attr( safecss_filter_attr( $colors['overlay_inline_styles'] ) );
       
   523 
       
   524 		return sprintf(
       
   525 			'<button aria-haspopup="dialog" %3$s class="%6$s" %10$s>%8$s</button>
       
   526 				<div class="%5$s" %7$s id="%1$s" %11$s>
       
   527 					<div class="wp-block-navigation__responsive-close" tabindex="-1">
       
   528 						<div class="wp-block-navigation__responsive-dialog" %12$s>
       
   529 							<button %4$s class="wp-block-navigation__responsive-container-close" %13$s>%9$s</button>
       
   530 							<div class="wp-block-navigation__responsive-container-content" %14$s id="%1$s-content">
       
   531 								%2$s
       
   532 							</div>
       
   533 						</div>
       
   534 					</div>
       
   535 				</div>',
       
   536 			esc_attr( $modal_unique_id ),
       
   537 			$inner_blocks_html,
       
   538 			$toggle_aria_label_open,
       
   539 			$toggle_aria_label_close,
       
   540 			esc_attr( implode( ' ', $responsive_container_classes ) ),
       
   541 			esc_attr( implode( ' ', $open_button_classes ) ),
       
   542 			( ! empty( $overlay_inline_styles ) ) ? "style=\"$overlay_inline_styles\"" : '',
       
   543 			$toggle_button_content,
       
   544 			$toggle_close_button_content,
       
   545 			$open_button_directives,
       
   546 			$responsive_container_directives,
       
   547 			$responsive_dialog_directives,
       
   548 			$close_button_directives,
       
   549 			$responsive_container_content_directives
       
   550 		);
       
   551 	}
       
   552 
       
   553 	/**
       
   554 	 * Get the wrapper attributes
       
   555 	 *
       
   556 	 * @since 6.5.0
       
   557 	 *
       
   558 	 * @param array         $attributes    The block attributes.
       
   559 	 * @param WP_Block_List $inner_blocks  A list of inner blocks.
       
   560 	 * @return string Returns the navigation block markup.
       
   561 	 */
       
   562 	private static function get_nav_wrapper_attributes( $attributes, $inner_blocks ) {
       
   563 		$nav_menu_name      = static::get_unique_navigation_name( $attributes );
       
   564 		$is_interactive     = static::is_interactive( $attributes, $inner_blocks );
       
   565 		$is_responsive_menu = static::is_responsive( $attributes );
       
   566 		$style              = static::get_styles( $attributes );
       
   567 		$class              = static::get_classes( $attributes );
       
   568 		$wrapper_attributes = get_block_wrapper_attributes(
       
   569 			array(
       
   570 				'class'      => $class,
       
   571 				'style'      => $style,
       
   572 				'aria-label' => $nav_menu_name,
       
   573 			)
       
   574 		);
       
   575 
       
   576 		if ( $is_responsive_menu ) {
       
   577 			$nav_element_directives = static::get_nav_element_directives( $is_interactive );
       
   578 			$wrapper_attributes    .= ' ' . $nav_element_directives;
       
   579 		}
       
   580 
       
   581 		return $wrapper_attributes;
       
   582 	}
       
   583 
       
   584 	/**
       
   585 	 * Gets the nav element directives.
       
   586 	 *
       
   587 	 * @since 6.5.0
       
   588 	 *
       
   589 	 * @param bool $is_interactive Whether the block is interactive.
       
   590 	 * @return string the directives for the navigation element.
       
   591 	 */
       
   592 	private static function get_nav_element_directives( $is_interactive ) {
       
   593 		if ( ! $is_interactive ) {
       
   594 			return '';
       
   595 		}
       
   596 		// When adding to this array be mindful of security concerns.
       
   597 		$nav_element_context    = wp_interactivity_data_wp_context(
       
   598 			array(
       
   599 				'overlayOpenedBy' => array(
       
   600 					'click' => false,
       
   601 					'hover' => false,
       
   602 					'focus' => false,
       
   603 				),
       
   604 				'type'            => 'overlay',
       
   605 				'roleAttribute'   => '',
       
   606 				'ariaLabel'       => __( 'Menu' ),
       
   607 			)
       
   608 		);
       
   609 		$nav_element_directives = '
       
   610 		 data-wp-interactive="core/navigation" '
       
   611 		. $nav_element_context;
       
   612 
       
   613 		return $nav_element_directives;
       
   614 	}
       
   615 
       
   616 	/**
       
   617 	 * Handle view script module loading.
       
   618 	 *
       
   619 	 * @since 6.5.0
       
   620 	 *
       
   621 	 * @param array         $attributes   The block attributes.
       
   622 	 * @param WP_Block      $block        The parsed block.
       
   623 	 * @param WP_Block_List $inner_blocks The list of inner blocks.
       
   624 	 */
       
   625 	private static function handle_view_script_module_loading( $attributes, $block, $inner_blocks ) {
       
   626 		if ( static::is_interactive( $attributes, $inner_blocks ) ) {
       
   627 			$suffix = wp_scripts_get_suffix();
       
   628 			if ( defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN ) {
       
   629 				$module_url = gutenberg_url( '/build/interactivity/navigation.min.js' );
       
   630 			}
       
   631 
       
   632 			wp_register_script_module(
       
   633 				'@wordpress/block-library/navigation',
       
   634 				isset( $module_url ) ? $module_url : includes_url( "blocks/navigation/view{$suffix}.js" ),
       
   635 				array( '@wordpress/interactivity' ),
       
   636 				defined( 'GUTENBERG_VERSION' ) ? GUTENBERG_VERSION : get_bloginfo( 'version' )
       
   637 			);
       
   638 			wp_enqueue_script_module( '@wordpress/block-library/navigation' );
       
   639 		}
       
   640 	}
       
   641 
       
   642 	/**
       
   643 	 * Returns the markup for the navigation block.
       
   644 	 *
       
   645 	 * @since 6.5.0
       
   646 	 *
       
   647 	 * @param array         $attributes The block attributes.
       
   648 	 * @param WP_Block_List $inner_blocks The list of inner blocks.
       
   649 	 * @return string Returns the navigation wrapper markup.
       
   650 	 */
       
   651 	private static function get_wrapper_markup( $attributes, $inner_blocks ) {
       
   652 		$inner_blocks_html = static::get_inner_blocks_html( $attributes, $inner_blocks );
       
   653 		if ( static::is_responsive( $attributes ) ) {
       
   654 			return static::get_responsive_container_markup( $attributes, $inner_blocks, $inner_blocks_html );
       
   655 		}
       
   656 		return $inner_blocks_html;
       
   657 	}
       
   658 
       
   659 	/**
       
   660 	 * Returns a unique name for the navigation.
       
   661 	 *
       
   662 	 * @since 6.5.0
       
   663 	 *
       
   664 	 * @param array $attributes The block attributes.
       
   665 	 * @return string Returns a unique name for the navigation.
       
   666 	 */
       
   667 	private static function get_unique_navigation_name( $attributes ) {
       
   668 		$nav_menu_name = static::get_navigation_name( $attributes );
       
   669 
       
   670 		// If the menu name has been used previously then append an ID
       
   671 		// to the name to ensure uniqueness across a given post.
       
   672 		if ( isset( static::$seen_menu_names[ $nav_menu_name ] ) && static::$seen_menu_names[ $nav_menu_name ] > 1 ) {
       
   673 			$count         = static::$seen_menu_names[ $nav_menu_name ];
       
   674 			$nav_menu_name = $nav_menu_name . ' ' . ( $count );
       
   675 		}
       
   676 
       
   677 		return $nav_menu_name;
       
   678 	}
       
   679 
       
   680 	/**
       
   681 	 * Renders the navigation block.
       
   682 	 *
       
   683 	 * @since 6.5.0
       
   684 	 *
       
   685 	 * @param array    $attributes The block attributes.
       
   686 	 * @param string   $content    The saved content.
       
   687 	 * @param WP_Block $block      The parsed block.
       
   688 	 * @return string Returns the navigation block markup.
       
   689 	 */
       
   690 	public static function render( $attributes, $content, $block ) {
       
   691 		/**
       
   692 		 * Deprecated:
       
   693 		 * The rgbTextColor and rgbBackgroundColor attributes
       
   694 		 * have been deprecated in favor of
       
   695 		 * customTextColor and customBackgroundColor ones.
       
   696 		 * Move the values from old attrs to the new ones.
       
   697 		 */
       
   698 		if ( isset( $attributes['rgbTextColor'] ) && empty( $attributes['textColor'] ) ) {
       
   699 			$attributes['customTextColor'] = $attributes['rgbTextColor'];
       
   700 		}
       
   701 
       
   702 		if ( isset( $attributes['rgbBackgroundColor'] ) && empty( $attributes['backgroundColor'] ) ) {
       
   703 			$attributes['customBackgroundColor'] = $attributes['rgbBackgroundColor'];
       
   704 		}
       
   705 
       
   706 		unset( $attributes['rgbTextColor'], $attributes['rgbBackgroundColor'] );
       
   707 
       
   708 		$inner_blocks = static::get_inner_blocks( $attributes, $block );
       
   709 		// Prevent navigation blocks referencing themselves from rendering.
       
   710 		if ( block_core_navigation_block_contains_core_navigation( $inner_blocks ) ) {
       
   711 			return '';
       
   712 		}
       
   713 
       
   714 		static::handle_view_script_module_loading( $attributes, $block, $inner_blocks );
       
   715 
       
   716 		return sprintf(
       
   717 			'<nav %1$s>%2$s</nav>',
       
   718 			static::get_nav_wrapper_attributes( $attributes, $inner_blocks ),
       
   719 			static::get_wrapper_markup( $attributes, $inner_blocks )
       
   720 		);
       
   721 	}
       
   722 }
     7 
   723 
     8 // These functions are used for the __unstableLocation feature and only active
   724 // These functions are used for the __unstableLocation feature and only active
     9 // when the gutenberg plugin is active.
   725 // when the gutenberg plugin is active.
    10 if ( defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN ) {
   726 if ( defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN ) {
    11 	/**
   727 	/**
    12 	 * Returns the menu items for a WordPress menu location.
   728 	 * Returns the menu items for a WordPress menu location.
       
   729 	 *
       
   730 	 * @since 5.9.0
    13 	 *
   731 	 *
    14 	 * @param string $location The menu location.
   732 	 * @param string $location The menu location.
    15 	 * @return array Menu items for the location.
   733 	 * @return array Menu items for the location.
    16 	 */
   734 	 */
    17 	function block_core_navigation_get_menu_items_at_location( $location ) {
   735 	function block_core_navigation_get_menu_items_at_location( $location ) {
    45 
   763 
    46 	/**
   764 	/**
    47 	 * Sorts a standard array of menu items into a nested structure keyed by the
   765 	 * Sorts a standard array of menu items into a nested structure keyed by the
    48 	 * id of the parent menu.
   766 	 * id of the parent menu.
    49 	 *
   767 	 *
       
   768 	 * @since 5.9.0
       
   769 	 *
    50 	 * @param array $menu_items Menu items to sort.
   770 	 * @param array $menu_items Menu items to sort.
    51 	 * @return array An array keyed by the id of the parent menu where each element
   771 	 * @return array An array keyed by the id of the parent menu where each element
    52 	 *               is an array of menu items that belong to that parent.
   772 	 *               is an array of menu items that belong to that parent.
    53 	 */
   773 	 */
    54 	function block_core_navigation_sort_menu_items_by_parent_id( $menu_items ) {
   774 	function block_core_navigation_sort_menu_items_by_parent_id( $menu_items ) {
    65 
   785 
    66 		return $menu_items_by_parent_id;
   786 		return $menu_items_by_parent_id;
    67 	}
   787 	}
    68 
   788 
    69 	/**
   789 	/**
    70 	 * Turns menu item data into a nested array of parsed blocks
   790 	 * Gets the inner blocks for the navigation block from the unstable location attribute.
    71 	 *
   791 	 *
    72 	 * @param array $menu_items               An array of menu items that represent
   792 	 * @since 6.5.0
    73 	 *                                        an individual level of a menu.
   793 	 *
    74 	 * @param array $menu_items_by_parent_id  An array keyed by the id of the
   794 	 * @param array $attributes The block attributes.
    75 	 *                                        parent menu where each element is an
   795 	 * @return WP_Block_List Returns the inner blocks for the navigation block.
    76 	 *                                        array of menu items that belong to
   796 	 */
    77 	 *                                        that parent.
   797 	function block_core_navigation_get_inner_blocks_from_unstable_location( $attributes ) {
    78 	 * @return array An array of parsed block data.
   798 		$menu_items = block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] );
    79 	 */
       
    80 	function block_core_navigation_parse_blocks_from_menu_items( $menu_items, $menu_items_by_parent_id ) {
       
    81 		if ( empty( $menu_items ) ) {
   799 		if ( empty( $menu_items ) ) {
    82 			return array();
   800 			return new WP_Block_List( array(), $attributes );
    83 		}
   801 		}
    84 
   802 
    85 		$blocks = array();
   803 		$menu_items_by_parent_id = block_core_navigation_sort_menu_items_by_parent_id( $menu_items );
    86 
   804 		$parsed_blocks           = block_core_navigation_parse_blocks_from_menu_items( $menu_items_by_parent_id[0], $menu_items_by_parent_id );
    87 		foreach ( $menu_items as $menu_item ) {
   805 		return new WP_Block_List( $parsed_blocks, $attributes );
    88 			$class_name       = ! empty( $menu_item->classes ) ? implode( ' ', (array) $menu_item->classes ) : null;
   806 	}
    89 			$id               = ( null !== $menu_item->object_id && 'custom' !== $menu_item->object ) ? $menu_item->object_id : null;
   807 }
    90 			$opens_in_new_tab = null !== $menu_item->target && '_blank' === $menu_item->target;
   808 
    91 			$rel              = ( null !== $menu_item->xfn && '' !== $menu_item->xfn ) ? $menu_item->xfn : null;
   809 /**
    92 			$kind             = null !== $menu_item->type ? str_replace( '_', '-', $menu_item->type ) : 'custom';
   810  * Add Interactivity API directives to the navigation-submenu and page-list
    93 
   811  * blocks markup using the Tag Processor.
    94 			$block = array(
   812  *
    95 				'blockName' => isset( $menu_items_by_parent_id[ $menu_item->ID ] ) ? 'core/navigation-submenu' : 'core/navigation-link',
   813  * @since 6.3.0
    96 				'attrs'     => array(
   814  *
    97 					'className'     => $class_name,
   815  * @param WP_HTML_Tag_Processor $tags             Markup of the navigation block.
    98 					'description'   => $menu_item->description,
   816  * @param array                 $block_attributes Block attributes.
    99 					'id'            => $id,
   817  *
   100 					'kind'          => $kind,
   818  * @return string Submenu markup with the directives injected.
   101 					'label'         => $menu_item->title,
   819  */
   102 					'opensInNewTab' => $opens_in_new_tab,
   820 function block_core_navigation_add_directives_to_submenu( $tags, $block_attributes ) {
   103 					'rel'           => $rel,
   821 	while ( $tags->next_tag(
   104 					'title'         => $menu_item->attr_title,
   822 		array(
   105 					'type'          => $menu_item->object,
   823 			'tag_name'   => 'LI',
   106 					'url'           => $menu_item->url,
   824 			'class_name' => 'has-child',
   107 				),
   825 		)
   108 			);
   826 	) ) {
   109 
   827 		// Add directives to the parent `<li>`.
   110 			$block['innerBlocks']  = isset( $menu_items_by_parent_id[ $menu_item->ID ] )
   828 		$tags->set_attribute( 'data-wp-interactive', 'core/navigation' );
   111 				? block_core_navigation_parse_blocks_from_menu_items( $menu_items_by_parent_id[ $menu_item->ID ], $menu_items_by_parent_id )
   829 		$tags->set_attribute( 'data-wp-context', '{ "submenuOpenedBy": { "click": false, "hover": false, "focus": false }, "type": "submenu" }' );
   112 				: array();
   830 		$tags->set_attribute( 'data-wp-watch', 'callbacks.initMenu' );
   113 			$block['innerContent'] = array_map( 'serialize_block', $block['innerBlocks'] );
   831 		$tags->set_attribute( 'data-wp-on--focusout', 'actions.handleMenuFocusout' );
   114 
   832 		$tags->set_attribute( 'data-wp-on--keydown', 'actions.handleMenuKeydown' );
   115 			$blocks[] = $block;
   833 
   116 		}
   834 		// This is a fix for Safari. Without it, Safari doesn't change the active
   117 
   835 		// element when the user clicks on a button. It can be removed once we add
   118 		return $blocks;
   836 		// an overlay to capture the clicks, instead of relying on the focusout
   119 	}
   837 		// event.
       
   838 		$tags->set_attribute( 'tabindex', '-1' );
       
   839 
       
   840 		if ( ! isset( $block_attributes['openSubmenusOnClick'] ) || false === $block_attributes['openSubmenusOnClick'] ) {
       
   841 			$tags->set_attribute( 'data-wp-on-async--mouseenter', 'actions.openMenuOnHover' );
       
   842 			$tags->set_attribute( 'data-wp-on-async--mouseleave', 'actions.closeMenuOnHover' );
       
   843 		}
       
   844 
       
   845 		// Add directives to the toggle submenu button.
       
   846 		if ( $tags->next_tag(
       
   847 			array(
       
   848 				'tag_name'   => 'BUTTON',
       
   849 				'class_name' => 'wp-block-navigation-submenu__toggle',
       
   850 			)
       
   851 		) ) {
       
   852 			$tags->set_attribute( 'data-wp-on-async--click', 'actions.toggleMenuOnClick' );
       
   853 			$tags->set_attribute( 'data-wp-bind--aria-expanded', 'state.isMenuOpen' );
       
   854 			// The `aria-expanded` attribute for SSR is already added in the submenu block.
       
   855 		}
       
   856 		// Add directives to the submenu.
       
   857 		if ( $tags->next_tag(
       
   858 			array(
       
   859 				'tag_name'   => 'UL',
       
   860 				'class_name' => 'wp-block-navigation__submenu-container',
       
   861 			)
       
   862 		) ) {
       
   863 			$tags->set_attribute( 'data-wp-on-async--focus', 'actions.openMenuOnFocus' );
       
   864 		}
       
   865 
       
   866 		// Iterate through subitems if exist.
       
   867 		block_core_navigation_add_directives_to_submenu( $tags, $block_attributes );
       
   868 	}
       
   869 	return $tags->get_updated_html();
   120 }
   870 }
   121 
   871 
   122 /**
   872 /**
   123  * Build an array with CSS classes and inline styles defining the colors
   873  * Build an array with CSS classes and inline styles defining the colors
   124  * which will be applied to the navigation markup in the front-end.
   874  * which will be applied to the navigation markup in the front-end.
       
   875  *
       
   876  * @since 5.9.0
   125  *
   877  *
   126  * @param array $attributes Navigation block attributes.
   878  * @param array $attributes Navigation block attributes.
   127  *
   879  *
   128  * @return array Colors CSS classes and inline styles.
   880  * @return array Colors CSS classes and inline styles.
   129  */
   881  */
   212 
   964 
   213 /**
   965 /**
   214  * Build an array with CSS classes and inline styles defining the font sizes
   966  * Build an array with CSS classes and inline styles defining the font sizes
   215  * which will be applied to the navigation markup in the front-end.
   967  * which will be applied to the navigation markup in the front-end.
   216  *
   968  *
       
   969  * @since 5.9.0
       
   970  *
   217  * @param array $attributes Navigation block attributes.
   971  * @param array $attributes Navigation block attributes.
   218  *
   972  *
   219  * @return array Font size CSS classes and inline styles.
   973  * @return array Font size CSS classes and inline styles.
   220  */
   974  */
   221 function block_core_navigation_build_css_font_sizes( $attributes ) {
   975 function block_core_navigation_build_css_font_sizes( $attributes ) {
   240 }
   994 }
   241 
   995 
   242 /**
   996 /**
   243  * Returns the top-level submenu SVG chevron icon.
   997  * Returns the top-level submenu SVG chevron icon.
   244  *
   998  *
       
   999  * @since 5.9.0
       
  1000  *
   245  * @return string
  1001  * @return string
   246  */
  1002  */
   247 function block_core_navigation_render_submenu_icon() {
  1003 function block_core_navigation_render_submenu_icon() {
   248 	return '<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" aria-hidden="true" focusable="false"><path d="M1.50002 4L6.00002 8L10.5 4" stroke-width="1.5"></path></svg>';
  1004 	return '<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" aria-hidden="true" focusable="false"><path d="M1.50002 4L6.00002 8L10.5 4" stroke-width="1.5"></path></svg>';
   249 }
       
   250 
       
   251 
       
   252 /**
       
   253  * Finds the first non-empty `wp_navigation` Post.
       
   254  *
       
   255  * @return WP_Post|null the first non-empty Navigation or null.
       
   256  */
       
   257 function block_core_navigation_get_first_non_empty_navigation() {
       
   258 	// Order and orderby args set to mirror those in `wp_get_nav_menus`
       
   259 	// see:
       
   260 	// - https://github.com/WordPress/wordpress-develop/blob/ba943e113d3b31b121f77a2d30aebe14b047c69d/src/wp-includes/nav-menu.php#L613-L619.
       
   261 	// - https://developer.wordpress.org/reference/classes/wp_query/#order-orderby-parameters.
       
   262 	$parsed_args = array(
       
   263 		'post_type'      => 'wp_navigation',
       
   264 		'no_found_rows'  => true,
       
   265 		'order'          => 'ASC',
       
   266 		'orderby'        => 'name',
       
   267 		'post_status'    => 'publish',
       
   268 		'posts_per_page' => 20, // Try the first 20 posts.
       
   269 	);
       
   270 
       
   271 	$navigation_posts = new WP_Query( $parsed_args );
       
   272 	foreach ( $navigation_posts->posts as $navigation_post ) {
       
   273 		if ( has_blocks( $navigation_post ) ) {
       
   274 			return $navigation_post;
       
   275 		}
       
   276 	}
       
   277 
       
   278 	return null;
       
   279 }
  1005 }
   280 
  1006 
   281 /**
  1007 /**
   282  * Filter out empty "null" blocks from the block list.
  1008  * Filter out empty "null" blocks from the block list.
   283  * 'parse_blocks' includes a null block with '\n\n' as the content when
  1009  * 'parse_blocks' includes a null block with '\n\n' as the content when
   284  * it encounters whitespace. This is not a bug but rather how the parser
  1010  * it encounters whitespace. This is not a bug but rather how the parser
   285  * is designed.
  1011  * is designed.
   286  *
  1012  *
       
  1013  * @since 5.9.0
       
  1014  *
   287  * @param array $parsed_blocks the parsed blocks to be normalized.
  1015  * @param array $parsed_blocks the parsed blocks to be normalized.
   288  * @return array the normalized parsed blocks.
  1016  * @return array the normalized parsed blocks.
   289  */
  1017  */
   290 function block_core_navigation_filter_out_empty_blocks( $parsed_blocks ) {
  1018 function block_core_navigation_filter_out_empty_blocks( $parsed_blocks ) {
   291 	$filtered = array_filter(
  1019 	$filtered = array_filter(
   292 		$parsed_blocks,
  1020 		$parsed_blocks,
   293 		function( $block ) {
  1021 		static function ( $block ) {
   294 			return isset( $block['blockName'] );
  1022 			return isset( $block['blockName'] );
   295 		}
  1023 		}
   296 	);
  1024 	);
   297 
  1025 
   298 	// Reset keys.
  1026 	// Reset keys.
   299 	return array_values( $filtered );
  1027 	return array_values( $filtered );
   300 }
  1028 }
   301 
  1029 
   302 /**
  1030 /**
       
  1031  * Returns true if the navigation block contains a nested navigation block.
       
  1032  *
       
  1033  * @since 6.2.0
       
  1034  *
       
  1035  * @param WP_Block_List $inner_blocks Inner block instance to be normalized.
       
  1036  * @return bool true if the navigation block contains a nested navigation block.
       
  1037  */
       
  1038 function block_core_navigation_block_contains_core_navigation( $inner_blocks ) {
       
  1039 	foreach ( $inner_blocks as $block ) {
       
  1040 		if ( 'core/navigation' === $block->name ) {
       
  1041 			return true;
       
  1042 		}
       
  1043 		if ( $block->inner_blocks && block_core_navigation_block_contains_core_navigation( $block->inner_blocks ) ) {
       
  1044 			return true;
       
  1045 		}
       
  1046 	}
       
  1047 
       
  1048 	return false;
       
  1049 }
       
  1050 
       
  1051 /**
   303  * Retrieves the appropriate fallback to be used on the front of the
  1052  * Retrieves the appropriate fallback to be used on the front of the
   304  * site when there is no menu assigned to the Nav block.
  1053  * site when there is no menu assigned to the Nav block.
   305  *
  1054  *
   306  * This aims to mirror how the fallback mechanic for wp_nav_menu works.
  1055  * This aims to mirror how the fallback mechanic for wp_nav_menu works.
   307  * See https://developer.wordpress.org/reference/functions/wp_nav_menu/#more-information.
  1056  * See https://developer.wordpress.org/reference/functions/wp_nav_menu/#more-information.
       
  1057  *
       
  1058  * @since 5.9.0
   308  *
  1059  *
   309  * @return array the array of blocks to be used as a fallback.
  1060  * @return array the array of blocks to be used as a fallback.
   310  */
  1061  */
   311 function block_core_navigation_get_fallback_blocks() {
  1062 function block_core_navigation_get_fallback_blocks() {
   312 	$page_list_fallback = array(
  1063 	$page_list_fallback = array(
   313 		array(
  1064 		array(
   314 			'blockName' => 'core/page-list',
  1065 			'blockName'    => 'core/page-list',
   315 			'attrs'     => array(
  1066 			'innerContent' => array(),
   316 				'__unstableMaxPages' => 4,
  1067 			'attrs'        => array(),
   317 			),
       
   318 		),
  1068 		),
   319 	);
  1069 	);
   320 
  1070 
   321 	$registry = WP_Block_Type_Registry::get_instance();
  1071 	$registry = WP_Block_Type_Registry::get_instance();
   322 
  1072 
   323 	// If `core/page-list` is not registered then return empty blocks.
  1073 	// If `core/page-list` is not registered then return empty blocks.
   324 	$fallback_blocks = $registry->is_registered( 'core/page-list' ) ? $page_list_fallback : array();
  1074 	$fallback_blocks = $registry->is_registered( 'core/page-list' ) ? $page_list_fallback : array();
   325 
  1075 	$navigation_post = WP_Navigation_Fallback::get_fallback();
   326 	// Default to a list of Pages.
  1076 
   327 
  1077 	// Use the first non-empty Navigation as fallback if available.
   328 	$navigation_post = block_core_navigation_get_first_non_empty_navigation();
       
   329 
       
   330 	// Prefer using the first non-empty Navigation as fallback if available.
       
   331 	if ( $navigation_post ) {
  1078 	if ( $navigation_post ) {
   332 		$maybe_fallback = block_core_navigation_filter_out_empty_blocks( parse_blocks( $navigation_post->post_content ) );
  1079 		$parsed_blocks  = parse_blocks( $navigation_post->post_content );
       
  1080 		$maybe_fallback = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );
   333 
  1081 
   334 		// Normalizing blocks may result in an empty array of blocks if they were all `null` blocks.
  1082 		// Normalizing blocks may result in an empty array of blocks if they were all `null` blocks.
   335 		// In this case default to the (Page List) fallback.
  1083 		// In this case default to the (Page List) fallback.
   336 		$fallback_blocks = ! empty( $maybe_fallback ) ? $maybe_fallback : $fallback_blocks;
  1084 		$fallback_blocks = ! empty( $maybe_fallback ) ? $maybe_fallback : $fallback_blocks;
       
  1085 
       
  1086 		if ( function_exists( 'set_ignored_hooked_blocks_metadata' ) ) {
       
  1087 			// Run Block Hooks algorithm to inject hooked blocks.
       
  1088 			// We have to run it here because we need the post ID of the Navigation block to track ignored hooked blocks.
       
  1089 			$markup = block_core_navigation_insert_hooked_blocks( $fallback_blocks, $navigation_post );
       
  1090 			$blocks = parse_blocks( $markup );
       
  1091 
       
  1092 			if ( isset( $blocks[0]['innerBlocks'] ) ) {
       
  1093 				$fallback_blocks = $blocks[0]['innerBlocks'];
       
  1094 			}
       
  1095 		}
   337 	}
  1096 	}
   338 
  1097 
   339 	/**
  1098 	/**
   340 	 * Filters the fallback experience for the Navigation block.
  1099 	 * Filters the fallback experience for the Navigation block.
   341 	 *
  1100 	 *
   343 	 * To customise the blocks provided return an array of blocks - these should be valid
  1102 	 * To customise the blocks provided return an array of blocks - these should be valid
   344 	 * children of the `core/navigation` block.
  1103 	 * children of the `core/navigation` block.
   345 	 *
  1104 	 *
   346 	 * @since 5.9.0
  1105 	 * @since 5.9.0
   347 	 *
  1106 	 *
   348 	 * @param array[] default fallback blocks provided by the default block mechanic.
  1107 	 * @param array[] $fallback_blocks default fallback blocks provided by the default block mechanic.
   349 	 */
  1108 	 */
   350 	return apply_filters( 'block_core_navigation_render_fallback', $fallback_blocks );
  1109 	return apply_filters( 'block_core_navigation_render_fallback', $fallback_blocks );
   351 }
  1110 }
   352 
  1111 
   353 /**
  1112 /**
   354  * Iterate through all inner blocks recursively and get navigation link block's post IDs.
  1113  * Iterate through all inner blocks recursively and get navigation link block's post IDs.
       
  1114  *
       
  1115  * @since 6.0.0
   355  *
  1116  *
   356  * @param WP_Block_List $inner_blocks Block list class instance.
  1117  * @param WP_Block_List $inner_blocks Block list class instance.
   357  *
  1118  *
   358  * @return array Array of post IDs.
  1119  * @return array Array of post IDs.
   359  */
  1120  */
   363 }
  1124 }
   364 
  1125 
   365 /**
  1126 /**
   366  * Get post IDs from a navigation link block instance.
  1127  * Get post IDs from a navigation link block instance.
   367  *
  1128  *
       
  1129  * @since 6.0.0
       
  1130  *
   368  * @param WP_Block $block Instance of a block.
  1131  * @param WP_Block $block Instance of a block.
   369  *
  1132  *
   370  * @return array Array of post IDs.
  1133  * @return array Array of post IDs.
   371  */
  1134  */
   372 function block_core_navigation_from_block_get_post_ids( $block ) {
  1135 function block_core_navigation_from_block_get_post_ids( $block ) {
   375 	if ( $block->inner_blocks ) {
  1138 	if ( $block->inner_blocks ) {
   376 		$post_ids = block_core_navigation_get_post_ids( $block->inner_blocks );
  1139 		$post_ids = block_core_navigation_get_post_ids( $block->inner_blocks );
   377 	}
  1140 	}
   378 
  1141 
   379 	if ( 'core/navigation-link' === $block->name || 'core/navigation-submenu' === $block->name ) {
  1142 	if ( 'core/navigation-link' === $block->name || 'core/navigation-submenu' === $block->name ) {
   380 		if ( $block->attributes && isset( $block->attributes['kind'] ) && 'post-type' === $block->attributes['kind'] ) {
  1143 		if ( $block->attributes && isset( $block->attributes['kind'] ) && 'post-type' === $block->attributes['kind'] && isset( $block->attributes['id'] ) ) {
   381 			$post_ids[] = $block->attributes['id'];
  1144 			$post_ids[] = $block->attributes['id'];
   382 		}
  1145 		}
   383 	}
  1146 	}
   384 
  1147 
   385 	return $post_ids;
  1148 	return $post_ids;
   386 }
  1149 }
   387 
  1150 
   388 /**
  1151 /**
   389  * Renders the `core/navigation` block on server.
  1152  * Renders the `core/navigation` block on server.
       
  1153  *
       
  1154  * @since 5.9.0
   390  *
  1155  *
   391  * @param array    $attributes The block attributes.
  1156  * @param array    $attributes The block attributes.
   392  * @param string   $content    The saved content.
  1157  * @param string   $content    The saved content.
   393  * @param WP_Block $block      The parsed block.
  1158  * @param WP_Block $block      The parsed block.
   394  *
  1159  *
   395  * @return string Returns the post content with the legacy widget added.
  1160  * @return string Returns the navigation block markup.
   396  */
  1161  */
   397 function render_block_core_navigation( $attributes, $content, $block ) {
  1162 function render_block_core_navigation( $attributes, $content, $block ) {
   398 
  1163 	return WP_Navigation_Block_Renderer::render( $attributes, $content, $block );
   399 	static $seen_menu_names = array();
       
   400 
       
   401 	// Flag used to indicate whether the rendered output is considered to be
       
   402 	// a fallback (i.e. the block has no menu associated with it).
       
   403 	$is_fallback = false;
       
   404 
       
   405 	$nav_menu_name = '';
       
   406 
       
   407 	/**
       
   408 	 * Deprecated:
       
   409 	 * The rgbTextColor and rgbBackgroundColor attributes
       
   410 	 * have been deprecated in favor of
       
   411 	 * customTextColor and customBackgroundColor ones.
       
   412 	 * Move the values from old attrs to the new ones.
       
   413 	 */
       
   414 	if ( isset( $attributes['rgbTextColor'] ) && empty( $attributes['textColor'] ) ) {
       
   415 		$attributes['customTextColor'] = $attributes['rgbTextColor'];
       
   416 	}
       
   417 
       
   418 	if ( isset( $attributes['rgbBackgroundColor'] ) && empty( $attributes['backgroundColor'] ) ) {
       
   419 		$attributes['customBackgroundColor'] = $attributes['rgbBackgroundColor'];
       
   420 	}
       
   421 
       
   422 	unset( $attributes['rgbTextColor'], $attributes['rgbBackgroundColor'] );
       
   423 
       
   424 	/**
       
   425 	 * This is for backwards compatibility after `isResponsive` attribute has been removed.
       
   426 	 */
       
   427 	$has_old_responsive_attribute = ! empty( $attributes['isResponsive'] ) && $attributes['isResponsive'];
       
   428 	$is_responsive_menu           = isset( $attributes['overlayMenu'] ) && 'never' !== $attributes['overlayMenu'] || $has_old_responsive_attribute;
       
   429 	$should_load_view_script      = ! wp_script_is( 'wp-block-navigation-view' ) && ( $is_responsive_menu || $attributes['openSubmenusOnClick'] || $attributes['showSubmenuIcon'] );
       
   430 	if ( $should_load_view_script ) {
       
   431 		wp_enqueue_script( 'wp-block-navigation-view' );
       
   432 	}
       
   433 
       
   434 	$inner_blocks = $block->inner_blocks;
       
   435 
       
   436 	// Ensure that blocks saved with the legacy ref attribute name (navigationMenuId) continue to render.
       
   437 	if ( array_key_exists( 'navigationMenuId', $attributes ) ) {
       
   438 		$attributes['ref'] = $attributes['navigationMenuId'];
       
   439 	}
       
   440 
       
   441 	// If:
       
   442 	// - the gutenberg plugin is active
       
   443 	// - `__unstableLocation` is defined
       
   444 	// - we have menu items at the defined location
       
   445 	// - we don't have a relationship to a `wp_navigation` Post (via `ref`).
       
   446 	// ...then create inner blocks from the classic menu assigned to that location.
       
   447 	if (
       
   448 		defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN &&
       
   449 		array_key_exists( '__unstableLocation', $attributes ) &&
       
   450 		! array_key_exists( 'ref', $attributes ) &&
       
   451 		! empty( block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] ) )
       
   452 	) {
       
   453 		$menu_items = block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] );
       
   454 		if ( empty( $menu_items ) ) {
       
   455 			return '';
       
   456 		}
       
   457 
       
   458 		$menu_items_by_parent_id = block_core_navigation_sort_menu_items_by_parent_id( $menu_items );
       
   459 		$parsed_blocks           = block_core_navigation_parse_blocks_from_menu_items( $menu_items_by_parent_id[0], $menu_items_by_parent_id );
       
   460 		$inner_blocks            = new WP_Block_List( $parsed_blocks, $attributes );
       
   461 	}
       
   462 
       
   463 	// Load inner blocks from the navigation post.
       
   464 	if ( array_key_exists( 'ref', $attributes ) ) {
       
   465 		$navigation_post = get_post( $attributes['ref'] );
       
   466 		if ( ! isset( $navigation_post ) ) {
       
   467 			return '';
       
   468 		}
       
   469 
       
   470 		$nav_menu_name = $navigation_post->post_title;
       
   471 
       
   472 		if ( isset( $seen_menu_names[ $nav_menu_name ] ) ) {
       
   473 			++$seen_menu_names[ $nav_menu_name ];
       
   474 		} else {
       
   475 			$seen_menu_names[ $nav_menu_name ] = 1;
       
   476 		}
       
   477 
       
   478 		$parsed_blocks = parse_blocks( $navigation_post->post_content );
       
   479 
       
   480 		// 'parse_blocks' includes a null block with '\n\n' as the content when
       
   481 		// it encounters whitespace. This code strips it.
       
   482 		$compacted_blocks = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );
       
   483 
       
   484 		// TODO - this uses the full navigation block attributes for the
       
   485 		// context which could be refined.
       
   486 		$inner_blocks = new WP_Block_List( $compacted_blocks, $attributes );
       
   487 	}
       
   488 
       
   489 	// If there are no inner blocks then fallback to rendering an appropriate fallback.
       
   490 	if ( empty( $inner_blocks ) ) {
       
   491 		$is_fallback = true; // indicate we are rendering the fallback.
       
   492 
       
   493 		$fallback_blocks = block_core_navigation_get_fallback_blocks();
       
   494 
       
   495 		// Fallback my have been filtered so do basic test for validity.
       
   496 		if ( empty( $fallback_blocks ) || ! is_array( $fallback_blocks ) ) {
       
   497 			return '';
       
   498 		}
       
   499 
       
   500 		$inner_blocks = new WP_Block_List( $fallback_blocks, $attributes );
       
   501 
       
   502 	}
       
   503 
       
   504 	$layout_justification = array(
       
   505 		'left'          => 'items-justified-left',
       
   506 		'right'         => 'items-justified-right',
       
   507 		'center'        => 'items-justified-center',
       
   508 		'space-between' => 'items-justified-space-between',
       
   509 	);
       
   510 
       
   511 	// Restore legacy classnames for submenu positioning.
       
   512 	$layout_class = '';
       
   513 	if ( isset( $attributes['layout']['justifyContent'] ) ) {
       
   514 		$layout_class .= $layout_justification[ $attributes['layout']['justifyContent'] ];
       
   515 	}
       
   516 	if ( isset( $attributes['layout']['orientation'] ) && 'vertical' === $attributes['layout']['orientation'] ) {
       
   517 		$layout_class .= ' is-vertical';
       
   518 	}
       
   519 
       
   520 	if ( isset( $attributes['layout']['flexWrap'] ) && 'nowrap' === $attributes['layout']['flexWrap'] ) {
       
   521 		$layout_class .= ' no-wrap';
       
   522 	}
       
   523 
       
   524 	// Manually add block support text decoration as CSS class.
       
   525 	$text_decoration       = _wp_array_get( $attributes, array( 'style', 'typography', 'textDecoration' ), null );
       
   526 	$text_decoration_class = sprintf( 'has-text-decoration-%s', $text_decoration );
       
   527 
       
   528 	$colors     = block_core_navigation_build_css_colors( $attributes );
       
   529 	$font_sizes = block_core_navigation_build_css_font_sizes( $attributes );
       
   530 	$classes    = array_merge(
       
   531 		$colors['css_classes'],
       
   532 		$font_sizes['css_classes'],
       
   533 		$is_responsive_menu ? array( 'is-responsive' ) : array(),
       
   534 		$layout_class ? array( $layout_class ) : array(),
       
   535 		$is_fallback ? array( 'is-fallback' ) : array(),
       
   536 		$text_decoration ? array( $text_decoration_class ) : array()
       
   537 	);
       
   538 
       
   539 	$post_ids = block_core_navigation_get_post_ids( $inner_blocks );
       
   540 	if ( $post_ids ) {
       
   541 		_prime_post_caches( $post_ids, false, false );
       
   542 	}
       
   543 
       
   544 	$inner_blocks_html = '';
       
   545 	$is_list_open      = false;
       
   546 	foreach ( $inner_blocks as $inner_block ) {
       
   547 		if ( ( 'core/navigation-link' === $inner_block->name || 'core/home-link' === $inner_block->name || 'core/site-title' === $inner_block->name || 'core/site-logo' === $inner_block->name || 'core/navigation-submenu' === $inner_block->name ) && ! $is_list_open ) {
       
   548 			$is_list_open       = true;
       
   549 			$inner_blocks_html .= '<ul class="wp-block-navigation__container">';
       
   550 		}
       
   551 		if ( 'core/navigation-link' !== $inner_block->name && 'core/home-link' !== $inner_block->name && 'core/site-title' !== $inner_block->name && 'core/site-logo' !== $inner_block->name && 'core/navigation-submenu' !== $inner_block->name && $is_list_open ) {
       
   552 			$is_list_open       = false;
       
   553 			$inner_blocks_html .= '</ul>';
       
   554 		}
       
   555 		if ( 'core/site-title' === $inner_block->name || 'core/site-logo' === $inner_block->name ) {
       
   556 			$inner_blocks_html .= '<li class="wp-block-navigation-item">' . $inner_block->render() . '</li>';
       
   557 		} else {
       
   558 			$inner_blocks_html .= $inner_block->render();
       
   559 		}
       
   560 	}
       
   561 
       
   562 	if ( $is_list_open ) {
       
   563 		$inner_blocks_html .= '</ul>';
       
   564 	}
       
   565 
       
   566 	$block_styles = isset( $attributes['styles'] ) ? $attributes['styles'] : '';
       
   567 
       
   568 	// If the menu name has been used previously then append an ID
       
   569 	// to the name to ensure uniqueness across a given post.
       
   570 	if ( isset( $seen_menu_names[ $nav_menu_name ] ) && $seen_menu_names[ $nav_menu_name ] > 1 ) {
       
   571 		$count         = $seen_menu_names[ $nav_menu_name ];
       
   572 		$nav_menu_name = $nav_menu_name . ' ' . ( $count );
       
   573 	}
       
   574 
       
   575 	$wrapper_attributes = get_block_wrapper_attributes(
       
   576 		array(
       
   577 			'class'      => implode( ' ', $classes ),
       
   578 			'style'      => $block_styles . $colors['inline_styles'] . $font_sizes['inline_styles'],
       
   579 			'aria-label' => $nav_menu_name,
       
   580 		)
       
   581 	);
       
   582 
       
   583 	$modal_unique_id = wp_unique_id( 'modal-' );
       
   584 
       
   585 	// Determine whether or not navigation elements should be wrapped in the markup required to make it responsive,
       
   586 	// return early if they don't.
       
   587 	if ( ! $is_responsive_menu ) {
       
   588 		return sprintf(
       
   589 			'<nav %1$s>%2$s</nav>',
       
   590 			$wrapper_attributes,
       
   591 			$inner_blocks_html
       
   592 		);
       
   593 	}
       
   594 
       
   595 	$is_hidden_by_default = isset( $attributes['overlayMenu'] ) && 'always' === $attributes['overlayMenu'];
       
   596 
       
   597 	$responsive_container_classes = array(
       
   598 		'wp-block-navigation__responsive-container',
       
   599 		$is_hidden_by_default ? 'hidden-by-default' : '',
       
   600 		implode( ' ', $colors['overlay_css_classes'] ),
       
   601 	);
       
   602 	$open_button_classes          = array(
       
   603 		'wp-block-navigation__responsive-container-open',
       
   604 		$is_hidden_by_default ? 'always-shown' : '',
       
   605 	);
       
   606 
       
   607 	$toggle_button_icon        = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><rect x="4" y="7.5" width="16" height="1.5" /><rect x="4" y="15" width="16" height="1.5" /></svg>';
       
   608 	$should_display_icon_label = isset( $attributes['hasIcon'] ) && true === $attributes['hasIcon'];
       
   609 	$toggle_button_content     = $should_display_icon_label ? $toggle_button_icon : 'Menu';
       
   610 
       
   611 	$responsive_container_markup = sprintf(
       
   612 		'<button aria-haspopup="true" aria-label="%3$s" class="%6$s" data-micromodal-trigger="%1$s">%9$s</button>
       
   613 			<div class="%5$s" style="%7$s" id="%1$s">
       
   614 				<div class="wp-block-navigation__responsive-close" tabindex="-1" data-micromodal-close>
       
   615 					<div class="wp-block-navigation__responsive-dialog" aria-label="%8$s">
       
   616 							<button aria-label="%4$s" data-micromodal-close class="wp-block-navigation__responsive-container-close"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M13 11.8l6.1-6.3-1-1-6.1 6.2-6.1-6.2-1 1 6.1 6.3-6.5 6.7 1 1 6.5-6.6 6.5 6.6 1-1z"></path></svg></button>
       
   617 						<div class="wp-block-navigation__responsive-container-content" id="%1$s-content">
       
   618 							%2$s
       
   619 						</div>
       
   620 					</div>
       
   621 				</div>
       
   622 			</div>',
       
   623 		esc_attr( $modal_unique_id ),
       
   624 		$inner_blocks_html,
       
   625 		__( 'Open menu' ), // Open button label.
       
   626 		__( 'Close menu' ), // Close button label.
       
   627 		esc_attr( implode( ' ', $responsive_container_classes ) ),
       
   628 		esc_attr( implode( ' ', $open_button_classes ) ),
       
   629 		safecss_filter_attr( $colors['overlay_inline_styles'] ),
       
   630 		__( 'Menu' ),
       
   631 		$toggle_button_content
       
   632 	);
       
   633 
       
   634 	return sprintf(
       
   635 		'<nav %1$s>%2$s</nav>',
       
   636 		$wrapper_attributes,
       
   637 		$responsive_container_markup
       
   638 	);
       
   639 }
  1164 }
   640 
  1165 
   641 /**
  1166 /**
   642  * Register the navigation block.
  1167  * Register the navigation block.
       
  1168  *
       
  1169  * @since 5.9.0
   643  *
  1170  *
   644  * @uses render_block_core_navigation()
  1171  * @uses render_block_core_navigation()
   645  * @throws WP_Error An WP_Error exception parsing the block definition.
  1172  * @throws WP_Error An WP_Error exception parsing the block definition.
   646  */
  1173  */
   647 function register_block_core_navigation() {
  1174 function register_block_core_navigation() {
   655 
  1182 
   656 add_action( 'init', 'register_block_core_navigation' );
  1183 add_action( 'init', 'register_block_core_navigation' );
   657 
  1184 
   658 /**
  1185 /**
   659  * Filter that changes the parsed attribute values of navigation blocks contain typographic presets to contain the values directly.
  1186  * Filter that changes the parsed attribute values of navigation blocks contain typographic presets to contain the values directly.
       
  1187  *
       
  1188  * @since 5.9.0
   660  *
  1189  *
   661  * @param array $parsed_block The block being rendered.
  1190  * @param array $parsed_block The block being rendered.
   662  *
  1191  *
   663  * @return array The block being rendered without typographic presets.
  1192  * @return array The block being rendered without typographic presets.
   664  */
  1193  */
   686 
  1215 
   687 	return $parsed_block;
  1216 	return $parsed_block;
   688 }
  1217 }
   689 
  1218 
   690 add_filter( 'render_block_data', 'block_core_navigation_typographic_presets_backcompatibility' );
  1219 add_filter( 'render_block_data', 'block_core_navigation_typographic_presets_backcompatibility' );
       
  1220 
       
  1221 /**
       
  1222  * Turns menu item data into a nested array of parsed blocks
       
  1223  *
       
  1224  * @since 5.9.0
       
  1225  *
       
  1226  * @deprecated 6.3.0 Use WP_Navigation_Fallback::parse_blocks_from_menu_items() instead.
       
  1227  *
       
  1228  * @param array $menu_items               An array of menu items that represent
       
  1229  *                                        an individual level of a menu.
       
  1230  * @param array $menu_items_by_parent_id  An array keyed by the id of the
       
  1231  *                                        parent menu where each element is an
       
  1232  *                                        array of menu items that belong to
       
  1233  *                                        that parent.
       
  1234  * @return array An array of parsed block data.
       
  1235  */
       
  1236 function block_core_navigation_parse_blocks_from_menu_items( $menu_items, $menu_items_by_parent_id ) {
       
  1237 
       
  1238 	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::parse_blocks_from_menu_items' );
       
  1239 
       
  1240 	if ( empty( $menu_items ) ) {
       
  1241 		return array();
       
  1242 	}
       
  1243 
       
  1244 	$blocks = array();
       
  1245 
       
  1246 	foreach ( $menu_items as $menu_item ) {
       
  1247 		$class_name       = ! empty( $menu_item->classes ) ? implode( ' ', (array) $menu_item->classes ) : null;
       
  1248 		$id               = ( null !== $menu_item->object_id && 'custom' !== $menu_item->object ) ? $menu_item->object_id : null;
       
  1249 		$opens_in_new_tab = null !== $menu_item->target && '_blank' === $menu_item->target;
       
  1250 		$rel              = ( null !== $menu_item->xfn && '' !== $menu_item->xfn ) ? $menu_item->xfn : null;
       
  1251 		$kind             = null !== $menu_item->type ? str_replace( '_', '-', $menu_item->type ) : 'custom';
       
  1252 
       
  1253 		$block = array(
       
  1254 			'blockName' => isset( $menu_items_by_parent_id[ $menu_item->ID ] ) ? 'core/navigation-submenu' : 'core/navigation-link',
       
  1255 			'attrs'     => array(
       
  1256 				'className'     => $class_name,
       
  1257 				'description'   => $menu_item->description,
       
  1258 				'id'            => $id,
       
  1259 				'kind'          => $kind,
       
  1260 				'label'         => $menu_item->title,
       
  1261 				'opensInNewTab' => $opens_in_new_tab,
       
  1262 				'rel'           => $rel,
       
  1263 				'title'         => $menu_item->attr_title,
       
  1264 				'type'          => $menu_item->object,
       
  1265 				'url'           => $menu_item->url,
       
  1266 			),
       
  1267 		);
       
  1268 
       
  1269 		$block['innerBlocks']  = isset( $menu_items_by_parent_id[ $menu_item->ID ] )
       
  1270 			? block_core_navigation_parse_blocks_from_menu_items( $menu_items_by_parent_id[ $menu_item->ID ], $menu_items_by_parent_id )
       
  1271 			: array();
       
  1272 		$block['innerContent'] = array_map( 'serialize_block', $block['innerBlocks'] );
       
  1273 
       
  1274 		$blocks[] = $block;
       
  1275 	}
       
  1276 
       
  1277 	return $blocks;
       
  1278 }
       
  1279 
       
  1280 /**
       
  1281  * Get the classic navigation menu to use as a fallback.
       
  1282  *
       
  1283  * @since 6.2.0
       
  1284  *
       
  1285  * @deprecated 6.3.0 Use WP_Navigation_Fallback::get_classic_menu_fallback() instead.
       
  1286  *
       
  1287  * @return object WP_Term The classic navigation.
       
  1288  */
       
  1289 function block_core_navigation_get_classic_menu_fallback() {
       
  1290 
       
  1291 	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_classic_menu_fallback' );
       
  1292 
       
  1293 	$classic_nav_menus = wp_get_nav_menus();
       
  1294 
       
  1295 	// If menus exist.
       
  1296 	if ( $classic_nav_menus && ! is_wp_error( $classic_nav_menus ) ) {
       
  1297 		// Handles simple use case where user has a classic menu and switches to a block theme.
       
  1298 
       
  1299 		// Returns the menu assigned to location `primary`.
       
  1300 		$locations = get_nav_menu_locations();
       
  1301 		if ( isset( $locations['primary'] ) ) {
       
  1302 			$primary_menu = wp_get_nav_menu_object( $locations['primary'] );
       
  1303 			if ( $primary_menu ) {
       
  1304 				return $primary_menu;
       
  1305 			}
       
  1306 		}
       
  1307 
       
  1308 		// Returns a menu if `primary` is its slug.
       
  1309 		foreach ( $classic_nav_menus as $classic_nav_menu ) {
       
  1310 			if ( 'primary' === $classic_nav_menu->slug ) {
       
  1311 				return $classic_nav_menu;
       
  1312 			}
       
  1313 		}
       
  1314 
       
  1315 		// Otherwise return the most recently created classic menu.
       
  1316 		usort(
       
  1317 			$classic_nav_menus,
       
  1318 			static function ( $a, $b ) {
       
  1319 				return $b->term_id - $a->term_id;
       
  1320 			}
       
  1321 		);
       
  1322 		return $classic_nav_menus[0];
       
  1323 	}
       
  1324 }
       
  1325 
       
  1326 /**
       
  1327  * Converts a classic navigation to blocks.
       
  1328  *
       
  1329  * @since 6.2.0
       
  1330  *
       
  1331  * @deprecated 6.3.0 Use WP_Navigation_Fallback::get_classic_menu_fallback_blocks() instead.
       
  1332  *
       
  1333  * @param  object $classic_nav_menu WP_Term The classic navigation object to convert.
       
  1334  * @return array the normalized parsed blocks.
       
  1335  */
       
  1336 function block_core_navigation_get_classic_menu_fallback_blocks( $classic_nav_menu ) {
       
  1337 
       
  1338 	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_classic_menu_fallback_blocks' );
       
  1339 
       
  1340 	// BEGIN: Code that already exists in wp_nav_menu().
       
  1341 	$menu_items = wp_get_nav_menu_items( $classic_nav_menu->term_id, array( 'update_post_term_cache' => false ) );
       
  1342 
       
  1343 	// Set up the $menu_item variables.
       
  1344 	_wp_menu_item_classes_by_context( $menu_items );
       
  1345 
       
  1346 	$sorted_menu_items = array();
       
  1347 	foreach ( (array) $menu_items as $menu_item ) {
       
  1348 		$sorted_menu_items[ $menu_item->menu_order ] = $menu_item;
       
  1349 	}
       
  1350 
       
  1351 	unset( $menu_items, $menu_item );
       
  1352 
       
  1353 	// END: Code that already exists in wp_nav_menu().
       
  1354 
       
  1355 	$menu_items_by_parent_id = array();
       
  1356 	foreach ( $sorted_menu_items as $menu_item ) {
       
  1357 		$menu_items_by_parent_id[ $menu_item->menu_item_parent ][] = $menu_item;
       
  1358 	}
       
  1359 
       
  1360 	$inner_blocks = block_core_navigation_parse_blocks_from_menu_items(
       
  1361 		isset( $menu_items_by_parent_id[0] )
       
  1362 			? $menu_items_by_parent_id[0]
       
  1363 			: array(),
       
  1364 		$menu_items_by_parent_id
       
  1365 	);
       
  1366 
       
  1367 	return serialize_blocks( $inner_blocks );
       
  1368 }
       
  1369 
       
  1370 /**
       
  1371  * If there's a classic menu then use it as a fallback.
       
  1372  *
       
  1373  * @since 6.2.0
       
  1374  *
       
  1375  * @deprecated 6.3.0 Use WP_Navigation_Fallback::create_classic_menu_fallback() instead.
       
  1376  *
       
  1377  * @return array the normalized parsed blocks.
       
  1378  */
       
  1379 function block_core_navigation_maybe_use_classic_menu_fallback() {
       
  1380 
       
  1381 	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::create_classic_menu_fallback' );
       
  1382 
       
  1383 	// See if we have a classic menu.
       
  1384 	$classic_nav_menu = block_core_navigation_get_classic_menu_fallback();
       
  1385 
       
  1386 	if ( ! $classic_nav_menu ) {
       
  1387 		return;
       
  1388 	}
       
  1389 
       
  1390 	// If we have a classic menu then convert it to blocks.
       
  1391 	$classic_nav_menu_blocks = block_core_navigation_get_classic_menu_fallback_blocks( $classic_nav_menu );
       
  1392 
       
  1393 	if ( empty( $classic_nav_menu_blocks ) ) {
       
  1394 		return;
       
  1395 	}
       
  1396 
       
  1397 	// Create a new navigation menu from the classic menu.
       
  1398 	$wp_insert_post_result = wp_insert_post(
       
  1399 		array(
       
  1400 			'post_content' => $classic_nav_menu_blocks,
       
  1401 			'post_title'   => $classic_nav_menu->name,
       
  1402 			'post_name'    => $classic_nav_menu->slug,
       
  1403 			'post_status'  => 'publish',
       
  1404 			'post_type'    => 'wp_navigation',
       
  1405 		),
       
  1406 		true // So that we can check whether the result is an error.
       
  1407 	);
       
  1408 
       
  1409 	if ( is_wp_error( $wp_insert_post_result ) ) {
       
  1410 		return;
       
  1411 	}
       
  1412 
       
  1413 	// Fetch the most recently published navigation which will be the classic one created above.
       
  1414 	return block_core_navigation_get_most_recently_published_navigation();
       
  1415 }
       
  1416 
       
  1417 /**
       
  1418  * Finds the most recently published `wp_navigation` Post.
       
  1419  *
       
  1420  * @since 6.1.0
       
  1421  *
       
  1422  * @deprecated 6.3.0 Use WP_Navigation_Fallback::get_most_recently_published_navigation() instead.
       
  1423  *
       
  1424  * @return WP_Post|null the first non-empty Navigation or null.
       
  1425  */
       
  1426 function block_core_navigation_get_most_recently_published_navigation() {
       
  1427 
       
  1428 	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_most_recently_published_navigation' );
       
  1429 
       
  1430 	// Default to the most recently created menu.
       
  1431 	$parsed_args = array(
       
  1432 		'post_type'              => 'wp_navigation',
       
  1433 		'no_found_rows'          => true,
       
  1434 		'update_post_meta_cache' => false,
       
  1435 		'update_post_term_cache' => false,
       
  1436 		'order'                  => 'DESC',
       
  1437 		'orderby'                => 'date',
       
  1438 		'post_status'            => 'publish',
       
  1439 		'posts_per_page'         => 1, // get only the most recent.
       
  1440 	);
       
  1441 
       
  1442 	$navigation_post = new WP_Query( $parsed_args );
       
  1443 	if ( count( $navigation_post->posts ) > 0 ) {
       
  1444 		return $navigation_post->posts[0];
       
  1445 	}
       
  1446 
       
  1447 	return null;
       
  1448 }
       
  1449 
       
  1450 /**
       
  1451  * Accepts the serialized markup of a block and its inner blocks, and returns serialized markup of the inner blocks.
       
  1452  *
       
  1453  * @since 6.5.0
       
  1454  *
       
  1455  * @param string $serialized_block The serialized markup of a block and its inner blocks.
       
  1456  * @return string
       
  1457  */
       
  1458 function block_core_navigation_remove_serialized_parent_block( $serialized_block ) {
       
  1459 	$start = strpos( $serialized_block, '-->' ) + strlen( '-->' );
       
  1460 	$end   = strrpos( $serialized_block, '<!--' );
       
  1461 	return substr( $serialized_block, $start, $end - $start );
       
  1462 }
       
  1463 
       
  1464 /**
       
  1465  * Mock a parsed block for the Navigation block given its inner blocks and the `wp_navigation` post object.
       
  1466  * The `wp_navigation` post's `_wp_ignored_hooked_blocks` meta is queried to add the `metadata.ignoredHookedBlocks` attribute.
       
  1467  *
       
  1468  * @since 6.5.0
       
  1469  *
       
  1470  * @param array   $inner_blocks Parsed inner blocks of a Navigation block.
       
  1471  * @param WP_Post $post         `wp_navigation` post object corresponding to the block.
       
  1472  *
       
  1473  * @return array the normalized parsed blocks.
       
  1474  */
       
  1475 function block_core_navigation_mock_parsed_block( $inner_blocks, $post ) {
       
  1476 	$attributes = array();
       
  1477 
       
  1478 	if ( isset( $post->ID ) ) {
       
  1479 		$ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
       
  1480 		if ( ! empty( $ignored_hooked_blocks ) ) {
       
  1481 			$ignored_hooked_blocks  = json_decode( $ignored_hooked_blocks, true );
       
  1482 			$attributes['metadata'] = array(
       
  1483 				'ignoredHookedBlocks' => $ignored_hooked_blocks,
       
  1484 			);
       
  1485 		}
       
  1486 	}
       
  1487 
       
  1488 	$mock_anchor_parent_block = array(
       
  1489 		'blockName'    => 'core/navigation',
       
  1490 		'attrs'        => $attributes,
       
  1491 		'innerBlocks'  => $inner_blocks,
       
  1492 		'innerContent' => array_fill( 0, count( $inner_blocks ), null ),
       
  1493 	);
       
  1494 
       
  1495 	return $mock_anchor_parent_block;
       
  1496 }
       
  1497 
       
  1498 /**
       
  1499  * Insert hooked blocks into a Navigation block.
       
  1500  *
       
  1501  * Given a Navigation block's inner blocks and its corresponding `wp_navigation` post object,
       
  1502  * this function inserts hooked blocks into it, and returns the serialized inner blocks in a
       
  1503  * mock Navigation block wrapper.
       
  1504  *
       
  1505  * If there are any hooked blocks that need to be inserted as the Navigation block's first or last
       
  1506  * children, the `wp_navigation` post's `_wp_ignored_hooked_blocks` meta is checked to see if any
       
  1507  * of those hooked blocks should be exempted from insertion.
       
  1508  *
       
  1509  * @since 6.5.0
       
  1510  *
       
  1511  * @param array   $inner_blocks Parsed inner blocks of a Navigation block.
       
  1512  * @param WP_Post $post         `wp_navigation` post object corresponding to the block.
       
  1513  * @return string Serialized inner blocks in mock Navigation block wrapper, with hooked blocks inserted, if any.
       
  1514  */
       
  1515 function block_core_navigation_insert_hooked_blocks( $inner_blocks, $post ) {
       
  1516 	$mock_navigation_block = block_core_navigation_mock_parsed_block( $inner_blocks, $post );
       
  1517 	$hooked_blocks         = get_hooked_blocks();
       
  1518 	$before_block_visitor  = null;
       
  1519 	$after_block_visitor   = null;
       
  1520 
       
  1521 	if ( ! empty( $hooked_blocks ) || has_filter( 'hooked_block_types' ) ) {
       
  1522 		$before_block_visitor = make_before_block_visitor( $hooked_blocks, $post, 'insert_hooked_blocks' );
       
  1523 		$after_block_visitor  = make_after_block_visitor( $hooked_blocks, $post, 'insert_hooked_blocks' );
       
  1524 	}
       
  1525 
       
  1526 	return traverse_and_serialize_block( $mock_navigation_block, $before_block_visitor, $after_block_visitor );
       
  1527 }
       
  1528 
       
  1529 /**
       
  1530  * Insert ignoredHookedBlocks meta into the Navigation block and its inner blocks.
       
  1531  *
       
  1532  * Given a Navigation block's inner blocks and its corresponding `wp_navigation` post object,
       
  1533  * this function inserts ignoredHookedBlocks meta into it, and returns the serialized inner blocks in a
       
  1534  * mock Navigation block wrapper.
       
  1535  *
       
  1536  * @since 6.5.0
       
  1537  *
       
  1538  * @param array   $inner_blocks Parsed inner blocks of a Navigation block.
       
  1539  * @param WP_Post $post         `wp_navigation` post object corresponding to the block.
       
  1540  * @return string Serialized inner blocks in mock Navigation block wrapper, with hooked blocks inserted, if any.
       
  1541  */
       
  1542 function block_core_navigation_set_ignored_hooked_blocks_metadata( $inner_blocks, $post ) {
       
  1543 	$mock_navigation_block = block_core_navigation_mock_parsed_block( $inner_blocks, $post );
       
  1544 	$hooked_blocks         = get_hooked_blocks();
       
  1545 	$before_block_visitor  = null;
       
  1546 	$after_block_visitor   = null;
       
  1547 
       
  1548 	if ( ! empty( $hooked_blocks ) || has_filter( 'hooked_block_types' ) ) {
       
  1549 		$before_block_visitor = make_before_block_visitor( $hooked_blocks, $post, 'set_ignored_hooked_blocks_metadata' );
       
  1550 		$after_block_visitor  = make_after_block_visitor( $hooked_blocks, $post, 'set_ignored_hooked_blocks_metadata' );
       
  1551 	}
       
  1552 
       
  1553 	return traverse_and_serialize_block( $mock_navigation_block, $before_block_visitor, $after_block_visitor );
       
  1554 }
       
  1555 
       
  1556 /**
       
  1557  * Updates the post meta with the list of ignored hooked blocks when the navigation is created or updated via the REST API.
       
  1558  *
       
  1559  * @access private
       
  1560  * @since 6.5.0
       
  1561  *
       
  1562  * @param stdClass $post Post object.
       
  1563  * @return stdClass The updated post object.
       
  1564  */
       
  1565 function block_core_navigation_update_ignore_hooked_blocks_meta( $post ) {
       
  1566 	/*
       
  1567 	 * In this scenario the user has likely tried to create a navigation via the REST API.
       
  1568 	 * In which case we won't have a post ID to work with and store meta against.
       
  1569 	 */
       
  1570 	if ( empty( $post->ID ) ) {
       
  1571 		return $post;
       
  1572 	}
       
  1573 
       
  1574 	/**
       
  1575 	 * Skip meta generation when consumers intentionally update specific Navigation fields
       
  1576 	 * and omit the content update.
       
  1577 	 */
       
  1578 	if ( ! isset( $post->post_content ) ) {
       
  1579 		return $post;
       
  1580 	}
       
  1581 
       
  1582 	/*
       
  1583 	 * We run the Block Hooks mechanism to inject the `metadata.ignoredHookedBlocks` attribute into
       
  1584 	 * all anchor blocks. For the root level, we create a mock Navigation and extract them from there.
       
  1585 	 */
       
  1586 	$blocks = parse_blocks( $post->post_content );
       
  1587 
       
  1588 	/*
       
  1589 	 * Block Hooks logic requires a `WP_Post` object (rather than the `stdClass` with the updates that
       
  1590 	 * we're getting from the `rest_pre_insert_wp_navigation` filter) as its second argument (to be
       
  1591 	 * used as context for hooked blocks insertion).
       
  1592 	 * We thus have to look it up from the DB,based on `$post->ID`.
       
  1593 	 */
       
  1594 	$markup = block_core_navigation_set_ignored_hooked_blocks_metadata( $blocks, get_post( $post->ID ) );
       
  1595 
       
  1596 	$root_nav_block        = parse_blocks( $markup )[0];
       
  1597 	$ignored_hooked_blocks = isset( $root_nav_block['attrs']['metadata']['ignoredHookedBlocks'] )
       
  1598 		? $root_nav_block['attrs']['metadata']['ignoredHookedBlocks']
       
  1599 		: array();
       
  1600 
       
  1601 	if ( ! empty( $ignored_hooked_blocks ) ) {
       
  1602 		$existing_ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
       
  1603 		if ( ! empty( $existing_ignored_hooked_blocks ) ) {
       
  1604 			$existing_ignored_hooked_blocks = json_decode( $existing_ignored_hooked_blocks, true );
       
  1605 			$ignored_hooked_blocks          = array_unique( array_merge( $ignored_hooked_blocks, $existing_ignored_hooked_blocks ) );
       
  1606 		}
       
  1607 		update_post_meta( $post->ID, '_wp_ignored_hooked_blocks', json_encode( $ignored_hooked_blocks ) );
       
  1608 	}
       
  1609 
       
  1610 	$post->post_content = block_core_navigation_remove_serialized_parent_block( $markup );
       
  1611 	return $post;
       
  1612 }
       
  1613 
       
  1614 /*
       
  1615  * Before adding our filter, we verify if it's already added in Core.
       
  1616  * However, during the build process, Gutenberg automatically prefixes our functions with "gutenberg_".
       
  1617  * Therefore, we concatenate the Core's function name to circumvent this prefix for our check.
       
  1618  */
       
  1619 $rest_insert_wp_navigation_core_callback = 'block_core_navigation_' . 'update_ignore_hooked_blocks_meta'; // phpcs:ignore Generic.Strings.UnnecessaryStringConcat.Found
       
  1620 
       
  1621 /*
       
  1622  * Do not add the `block_core_navigation_update_ignore_hooked_blocks_meta` filter in the following cases:
       
  1623  * - If Core has added the `update_ignored_hooked_blocks_postmeta` filter already (WP >= 6.6);
       
  1624  * - or if the `set_ignored_hooked_blocks_metadata` function is unavailable (which is required for the filter to work. It was introduced by WP 6.5 but is not present in Gutenberg's WP 6.5 compatibility layer);
       
  1625  * - or if the `$rest_insert_wp_navigation_core_callback` filter has already been added.
       
  1626  */
       
  1627 if (
       
  1628 	! has_filter( 'rest_pre_insert_wp_navigation', 'update_ignored_hooked_blocks_postmeta' ) &&
       
  1629 	function_exists( 'set_ignored_hooked_blocks_metadata' ) &&
       
  1630 	! has_filter( 'rest_pre_insert_wp_navigation', $rest_insert_wp_navigation_core_callback )
       
  1631 ) {
       
  1632 	add_filter( 'rest_pre_insert_wp_navigation', 'block_core_navigation_update_ignore_hooked_blocks_meta' );
       
  1633 }
       
  1634 
       
  1635 /*
       
  1636  * Previous versions of Gutenberg were attaching the block_core_navigation_update_ignore_hooked_blocks_meta
       
  1637  * function to the `rest_insert_wp_navigation` _action_ (rather than the `rest_pre_insert_wp_navigation` _filter_).
       
  1638  * To avoid collisions, we need to remove the filter from that action if it's present.
       
  1639  */
       
  1640 if ( has_filter( 'rest_insert_wp_navigation', $rest_insert_wp_navigation_core_callback ) ) {
       
  1641 	remove_filter( 'rest_insert_wp_navigation', $rest_insert_wp_navigation_core_callback );
       
  1642 }
       
  1643 
       
  1644 /**
       
  1645  * Hooks into the REST API response for the core/navigation block and adds the first and last inner blocks.
       
  1646  *
       
  1647  * @since 6.5.0
       
  1648  *
       
  1649  * @param WP_REST_Response $response The response object.
       
  1650  * @param WP_Post          $post     Post object.
       
  1651  * @return WP_REST_Response The response object.
       
  1652  */
       
  1653 function block_core_navigation_insert_hooked_blocks_into_rest_response( $response, $post ) {
       
  1654 	if ( ! isset( $response->data['content']['raw'] ) || ! isset( $response->data['content']['rendered'] ) ) {
       
  1655 		return $response;
       
  1656 	}
       
  1657 	$parsed_blocks = parse_blocks( $response->data['content']['raw'] );
       
  1658 	$content       = block_core_navigation_insert_hooked_blocks( $parsed_blocks, $post );
       
  1659 
       
  1660 	// Remove mock Navigation block wrapper.
       
  1661 	$content = block_core_navigation_remove_serialized_parent_block( $content );
       
  1662 
       
  1663 	$response->data['content']['raw'] = $content;
       
  1664 
       
  1665 	/** This filter is documented in wp-includes/post-template.php */
       
  1666 	$response->data['content']['rendered'] = apply_filters( 'the_content', $content );
       
  1667 
       
  1668 	return $response;
       
  1669 }
       
  1670 
       
  1671 /*
       
  1672  *  Before adding our filter, we verify if it's already added in Core.
       
  1673  * However, during the build process, Gutenberg automatically prefixes our functions with "gutenberg_".
       
  1674  * Therefore, we concatenate the Core's function name to circumvent this prefix for our check.
       
  1675  */
       
  1676 $rest_prepare_wp_navigation_core_callback = 'block_core_navigation_' . 'insert_hooked_blocks_into_rest_response';
       
  1677 
       
  1678 /*
       
  1679  * Do not add the `block_core_navigation_insert_hooked_blocks_into_rest_response` filter in the following cases:
       
  1680  * - If Core has added the `insert_hooked_blocks_into_rest_response` filter already (WP >= 6.6);
       
  1681  * - or if the `set_ignored_hooked_blocks_metadata` function is unavailable (which is required for the filter to work. It was introduced by WP 6.5 but is not present in Gutenberg's WP 6.5 compatibility layer);
       
  1682  * - or if the `$rest_prepare_wp_navigation_core_callback` filter has already been added.
       
  1683  */
       
  1684 if (
       
  1685 	! has_filter( 'rest_prepare_wp_navigation', 'insert_hooked_blocks_into_rest_response' ) &&
       
  1686 	function_exists( 'set_ignored_hooked_blocks_metadata' ) &&
       
  1687 	! has_filter( 'rest_prepare_wp_navigation', $rest_prepare_wp_navigation_core_callback )
       
  1688 ) {
       
  1689 	add_filter( 'rest_prepare_wp_navigation', 'block_core_navigation_insert_hooked_blocks_into_rest_response', 10, 3 );
       
  1690 }