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<?php /** * Functions related to registering and parsing blocks. * * @package WordPress * @subpackage Blocks * @since 5.0.0 */ /** * Removes the block asset's path prefix if provided. * * @since 5.5.0 * * @param string $asset_handle_or_path Asset handle or prefixed path. * @return string Path without the prefix or the original value. */ function remove_block_asset_path_prefix( $asset_handle_or_path ) { $path_prefix = 'file:'; if ( ! str_starts_with( $asset_handle_or_path, $path_prefix ) ) { return $asset_handle_or_path; } $path = substr( $asset_handle_or_path, strlen( $path_prefix ) ); if ( str_starts_with( $path, './' ) ) { $path = substr( $path, 2 ); } return $path; } /** * Generates the name for an asset based on the name of the block * and the field name provided. * * @since 5.5.0 * @since 6.1.0 Added `$index` parameter. * @since 6.5.0 Added support for `viewScriptModule` field. * * @param string $block_name Name of the block. * @param string $field_name Name of the metadata field. * @param int $index Optional. Index of the asset when multiple items passed. * Default 0. * @return string Generated asset name for the block's field. */ function generate_block_asset_handle( $block_name, $field_name, $index = 0 ) { if ( str_starts_with( $block_name, 'core/' ) ) { $asset_handle = str_replace( 'core/', 'wp-block-', $block_name ); if ( str_starts_with( $field_name, 'editor' ) ) { $asset_handle .= '-editor'; } if ( str_starts_with( $field_name, 'view' ) ) { $asset_handle .= '-view'; } if ( str_ends_with( strtolower( $field_name ), 'scriptmodule' ) ) { $asset_handle .= '-script-module'; } if ( $index > 0 ) { $asset_handle .= '-' . ( $index + 1 ); } return $asset_handle; } $field_mappings = array( 'editorScript' => 'editor-script', 'editorStyle' => 'editor-style', 'script' => 'script', 'style' => 'style', 'viewScript' => 'view-script', 'viewScriptModule' => 'view-script-module', 'viewStyle' => 'view-style', ); $asset_handle = str_replace( '/', '-', $block_name ) . '-' . $field_mappings[ $field_name ]; if ( $index > 0 ) { $asset_handle .= '-' . ( $index + 1 ); } return $asset_handle; } /** * Gets the URL to a block asset. * * @since 6.4.0 * * @param string $path A normalized path to a block asset. * @return string|false The URL to the block asset or false on failure. */ function get_block_asset_url( $path ) { if ( empty( $path ) ) { return false; } // Path needs to be normalized to work in Windows env. static $wpinc_path_norm = ''; if ( ! $wpinc_path_norm ) { $wpinc_path_norm = wp_normalize_path( realpath( ABSPATH . WPINC ) ); } if ( str_starts_with( $path, $wpinc_path_norm ) ) { return includes_url( str_replace( $wpinc_path_norm, '', $path ) ); } static $template_paths_norm = array(); $template = get_template(); if ( ! isset( $template_paths_norm[ $template ] ) ) { $template_paths_norm[ $template ] = wp_normalize_path( realpath( get_template_directory() ) ); } if ( str_starts_with( $path, trailingslashit( $template_paths_norm[ $template ] ) ) ) { return get_theme_file_uri( str_replace( $template_paths_norm[ $template ], '', $path ) ); } if ( is_child_theme() ) { $stylesheet = get_stylesheet(); if ( ! isset( $template_paths_norm[ $stylesheet ] ) ) { $template_paths_norm[ $stylesheet ] = wp_normalize_path( realpath( get_stylesheet_directory() ) ); } if ( str_starts_with( $path, trailingslashit( $template_paths_norm[ $stylesheet ] ) ) ) { return get_theme_file_uri( str_replace( $template_paths_norm[ $stylesheet ], '', $path ) ); } } return plugins_url( basename( $path ), $path ); } /** * Finds a script module ID for the selected block metadata field. It detects * when a path to file was provided and optionally finds a corresponding asset * file with details necessary to register the script module under with an * automatically generated module ID. It returns unprocessed script module * ID otherwise. * * @since 6.5.0 * * @param array $metadata Block metadata. * @param string $field_name Field name to pick from metadata. * @param int $index Optional. Index of the script module ID to register when multiple * items passed. Default 0. * @return string|false Script module ID or false on failure. */ function register_block_script_module_id( $metadata, $field_name, $index = 0 ) { if ( empty( $metadata[ $field_name ] ) ) { return false; } $module_id = $metadata[ $field_name ]; if ( is_array( $module_id ) ) { if ( empty( $module_id[ $index ] ) ) { return false; } $module_id = $module_id[ $index ]; } $module_path = remove_block_asset_path_prefix( $module_id ); if ( $module_id === $module_path ) { return $module_id; } $path = dirname( $metadata['file'] ); $module_asset_raw_path = $path . '/' . substr_replace( $module_path, '.asset.php', - strlen( '.js' ) ); $module_id = generate_block_asset_handle( $metadata['name'], $field_name, $index ); $module_asset_path = wp_normalize_path( realpath( $module_asset_raw_path ) ); $module_path_norm = wp_normalize_path( realpath( $path . '/' . $module_path ) ); $module_uri = get_block_asset_url( $module_path_norm ); $module_asset = ! empty( $module_asset_path ) ? require $module_asset_path : array(); $module_dependencies = isset( $module_asset['dependencies'] ) ? $module_asset['dependencies'] : array(); $block_version = isset( $metadata['version'] ) ? $metadata['version'] : false; $module_version = isset( $module_asset['version'] ) ? $module_asset['version'] : $block_version; wp_register_script_module( $module_id, $module_uri, $module_dependencies, $module_version ); return $module_id; } /** * Finds a script handle for the selected block metadata field. It detects * when a path to file was provided and optionally finds a corresponding asset * file with details necessary to register the script under automatically * generated handle name. It returns unprocessed script handle otherwise. * * @since 5.5.0 * @since 6.1.0 Added `$index` parameter. * @since 6.5.0 The asset file is optional. Added script handle support in the asset file. * * @param array $metadata Block metadata. * @param string $field_name Field name to pick from metadata. * @param int $index Optional. Index of the script to register when multiple items passed. * Default 0. * @return string|false Script handle provided directly or created through * script's registration, or false on failure. */ function register_block_script_handle( $metadata, $field_name, $index = 0 ) { if ( empty( $metadata[ $field_name ] ) ) { return false; } $script_handle_or_path = $metadata[ $field_name ]; if ( is_array( $script_handle_or_path ) ) { if ( empty( $script_handle_or_path[ $index ] ) ) { return false; } $script_handle_or_path = $script_handle_or_path[ $index ]; } $script_path = remove_block_asset_path_prefix( $script_handle_or_path ); if ( $script_handle_or_path === $script_path ) { return $script_handle_or_path; } $path = dirname( $metadata['file'] ); $script_asset_raw_path = $path . '/' . substr_replace( $script_path, '.asset.php', - strlen( '.js' ) ); $script_asset_path = wp_normalize_path( realpath( $script_asset_raw_path ) ); // Asset file for blocks is optional. See https://core.trac.wordpress.org/ticket/60460. $script_asset = ! empty( $script_asset_path ) ? require $script_asset_path : array(); $script_handle = isset( $script_asset['handle'] ) ? $script_asset['handle'] : generate_block_asset_handle( $metadata['name'], $field_name, $index ); if ( wp_script_is( $script_handle, 'registered' ) ) { return $script_handle; } $script_path_norm = wp_normalize_path( realpath( $path . '/' . $script_path ) ); $script_uri = get_block_asset_url( $script_path_norm ); $script_dependencies = isset( $script_asset['dependencies'] ) ? $script_asset['dependencies'] : array(); $block_version = isset( $metadata['version'] ) ? $metadata['version'] : false; $script_version = isset( $script_asset['version'] ) ? $script_asset['version'] : $block_version; $script_args = array(); if ( 'viewScript' === $field_name && $script_uri ) { $script_args['strategy'] = 'defer'; } $result = wp_register_script( $script_handle, $script_uri, $script_dependencies, $script_version, $script_args ); if ( ! $result ) { return false; } if ( ! empty( $metadata['textdomain'] ) && in_array( 'wp-i18n', $script_dependencies, true ) ) { wp_set_script_translations( $script_handle, $metadata['textdomain'] ); } return $script_handle; } /** * Finds a style handle for the block metadata field. It detects when a path * to file was provided and registers the style under automatically * generated handle name. It returns unprocessed style handle otherwise. * * @since 5.5.0 * @since 6.1.0 Added `$index` parameter. * * @param array $metadata Block metadata. * @param string $field_name Field name to pick from metadata. * @param int $index Optional. Index of the style to register when multiple items passed. * Default 0. * @return string|false Style handle provided directly or created through * style's registration, or false on failure. */ function register_block_style_handle( $metadata, $field_name, $index = 0 ) { if ( empty( $metadata[ $field_name ] ) ) { return false; } $style_handle = $metadata[ $field_name ]; if ( is_array( $style_handle ) ) { if ( empty( $style_handle[ $index ] ) ) { return false; } $style_handle = $style_handle[ $index ]; } $style_handle_name = generate_block_asset_handle( $metadata['name'], $field_name, $index ); // If the style handle is already registered, skip re-registering. if ( wp_style_is( $style_handle_name, 'registered' ) ) { return $style_handle_name; } static $wpinc_path_norm = ''; if ( ! $wpinc_path_norm ) { $wpinc_path_norm = wp_normalize_path( realpath( ABSPATH . WPINC ) ); } $is_core_block = isset( $metadata['file'] ) && str_starts_with( $metadata['file'], $wpinc_path_norm ); // Skip registering individual styles for each core block when a bundled version provided. if ( $is_core_block && ! wp_should_load_separate_core_block_assets() ) { return false; } $style_path = remove_block_asset_path_prefix( $style_handle ); $is_style_handle = $style_handle === $style_path; // Allow only passing style handles for core blocks. if ( $is_core_block && ! $is_style_handle ) { return false; } // Return the style handle unless it's the first item for every core block that requires special treatment. if ( $is_style_handle && ! ( $is_core_block && 0 === $index ) ) { return $style_handle; } // Check whether styles should have a ".min" suffix or not. $suffix = SCRIPT_DEBUG ? '' : '.min'; if ( $is_core_block ) { $style_path = ( 'editorStyle' === $field_name ) ? "editor{$suffix}.css" : "style{$suffix}.css"; } $style_path_norm = wp_normalize_path( realpath( dirname( $metadata['file'] ) . '/' . $style_path ) ); $style_uri = get_block_asset_url( $style_path_norm ); $block_version = ! $is_core_block && isset( $metadata['version'] ) ? $metadata['version'] : false; $version = $style_path_norm && defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? filemtime( $style_path_norm ) : $block_version; $result = wp_register_style( $style_handle_name, $style_uri, array(), $version ); if ( ! $result ) { return false; } if ( $style_uri ) { wp_style_add_data( $style_handle_name, 'path', $style_path_norm ); if ( $is_core_block ) { $rtl_file = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $style_path_norm ); } else { $rtl_file = str_replace( '.css', '-rtl.css', $style_path_norm ); } if ( is_rtl() && file_exists( $rtl_file ) ) { wp_style_add_data( $style_handle_name, 'rtl', 'replace' ); wp_style_add_data( $style_handle_name, 'suffix', $suffix ); wp_style_add_data( $style_handle_name, 'path', $rtl_file ); } } return $style_handle_name; } /** * Gets i18n schema for block's metadata read from `block.json` file. * * @since 5.9.0 * * @return object The schema for block's metadata. */ function get_block_metadata_i18n_schema() { static $i18n_block_schema; if ( ! isset( $i18n_block_schema ) ) { $i18n_block_schema = wp_json_file_decode( __DIR__ . '/block-i18n.json' ); } return $i18n_block_schema; } /** * Registers all block types from a block metadata collection. * * This can either reference a previously registered metadata collection or, if the `$manifest` parameter is provided, * register the metadata collection directly within the same function call. * * @since 6.8.0 * @see wp_register_block_metadata_collection() * @see register_block_type_from_metadata() * * @param string $path The absolute base path for the collection ( e.g., WP_PLUGIN_DIR . '/my-plugin/blocks/' ). * @param string $manifest Optional. The absolute path to the manifest file containing the metadata collection, in * order to register the collection. If this parameter is not provided, the `$path` parameter * must reference a previously registered block metadata collection. */ function wp_register_block_types_from_metadata_collection( $path, $manifest = '' ) { if ( $manifest ) { wp_register_block_metadata_collection( $path, $manifest ); } $block_metadata_files = WP_Block_Metadata_Registry::get_collection_block_metadata_files( $path ); foreach ( $block_metadata_files as $block_metadata_file ) { register_block_type_from_metadata( $block_metadata_file ); } } /** * Registers a block metadata collection. * * This function allows core and third-party plugins to register their block metadata * collections in a centralized location. Registering collections can improve performance * by avoiding multiple reads from the filesystem and parsing JSON. * * @since 6.7.0 * * @param string $path The base path in which block files for the collection reside. * @param string $manifest The path to the manifest file for the collection. */ function wp_register_block_metadata_collection( $path, $manifest ) { WP_Block_Metadata_Registry::register_collection( $path, $manifest ); } /** * Registers a block type from the metadata stored in the `block.json` file. * * @since 5.5.0 * @since 5.7.0 Added support for `textdomain` field and i18n handling for all translatable fields. * @since 5.9.0 Added support for `variations` and `viewScript` fields. * @since 6.1.0 Added support for `render` field. * @since 6.3.0 Added `selectors` field. * @since 6.4.0 Added support for `blockHooks` field. * @since 6.5.0 Added support for `allowedBlocks`, `viewScriptModule`, and `viewStyle` fields. * @since 6.7.0 Allow PHP filename as `variations` argument. * * @param string $file_or_folder Path to the JSON file with metadata definition for * the block or path to the folder where the `block.json` file is located. * If providing the path to a JSON file, the filename must end with `block.json`. * @param array $args Optional. Array of block type arguments. Accepts any public property * of `WP_Block_Type`. See WP_Block_Type::__construct() for information * on accepted arguments. Default empty array. * @return WP_Block_Type|false The registered block type on success, or false on failure. */ function register_block_type_from_metadata( $file_or_folder, $args = array() ) { /* * Get an array of metadata from a PHP file. * This improves performance for core blocks as it's only necessary to read a single PHP file * instead of reading a JSON file per-block, and then decoding from JSON to PHP. * Using a static variable ensures that the metadata is only read once per request. */ $file_or_folder = wp_normalize_path( $file_or_folder ); $metadata_file = ( ! str_ends_with( $file_or_folder, 'block.json' ) ) ? trailingslashit( $file_or_folder ) . 'block.json' : $file_or_folder; $is_core_block = str_starts_with( $file_or_folder, wp_normalize_path( ABSPATH . WPINC ) ); $metadata_file_exists = $is_core_block || file_exists( $metadata_file ); $registry_metadata = WP_Block_Metadata_Registry::get_metadata( $file_or_folder ); if ( $registry_metadata ) { $metadata = $registry_metadata; } elseif ( $metadata_file_exists ) { $metadata = wp_json_file_decode( $metadata_file, array( 'associative' => true ) ); } else { $metadata = array(); } if ( ! is_array( $metadata ) || ( empty( $metadata['name'] ) && empty( $args['name'] ) ) ) { return false; } $metadata['file'] = $metadata_file_exists ? wp_normalize_path( realpath( $metadata_file ) ) : null; /** * Filters the metadata provided for registering a block type. * * @since 5.7.0 * * @param array $metadata Metadata for registering a block type. */ $metadata = apply_filters( 'block_type_metadata', $metadata ); // Add `style` and `editor_style` for core blocks if missing. if ( ! empty( $metadata['name'] ) && str_starts_with( $metadata['name'], 'core/' ) ) { $block_name = str_replace( 'core/', '', $metadata['name'] ); if ( ! isset( $metadata['style'] ) ) { $metadata['style'] = "wp-block-$block_name"; } if ( current_theme_supports( 'wp-block-styles' ) && wp_should_load_separate_core_block_assets() ) { $metadata['style'] = (array) $metadata['style']; $metadata['style'][] = "wp-block-{$block_name}-theme"; } if ( ! isset( $metadata['editorStyle'] ) ) { $metadata['editorStyle'] = "wp-block-{$block_name}-editor"; } } $settings = array(); $property_mappings = array( 'apiVersion' => 'api_version', 'name' => 'name', 'title' => 'title', 'category' => 'category', 'parent' => 'parent', 'ancestor' => 'ancestor', 'icon' => 'icon', 'description' => 'description', 'keywords' => 'keywords', 'attributes' => 'attributes', 'providesContext' => 'provides_context', 'usesContext' => 'uses_context', 'selectors' => 'selectors', 'supports' => 'supports', 'styles' => 'styles', 'variations' => 'variations', 'example' => 'example', 'allowedBlocks' => 'allowed_blocks', ); $textdomain = ! empty( $metadata['textdomain'] ) ? $metadata['textdomain'] : null; $i18n_schema = get_block_metadata_i18n_schema(); foreach ( $property_mappings as $key => $mapped_key ) { if ( isset( $metadata[ $key ] ) ) { $settings[ $mapped_key ] = $metadata[ $key ]; if ( $metadata_file_exists && $textdomain && isset( $i18n_schema->$key ) ) { $settings[ $mapped_key ] = translate_settings_using_i18n_schema( $i18n_schema->$key, $settings[ $key ], $textdomain ); } } } if ( ! empty( $metadata['render'] ) ) { $template_path = wp_normalize_path( realpath( dirname( $metadata['file'] ) . '/' . remove_block_asset_path_prefix( $metadata['render'] ) ) ); if ( $template_path ) { /** * Renders the block on the server. * * @since 6.1.0 * * @param array $attributes Block attributes. * @param string $content Block default content. * @param WP_Block $block Block instance. * * @return string Returns the block content. */ $settings['render_callback'] = static function ( $attributes, $content, $block ) use ( $template_path ) { ob_start(); require $template_path; return ob_get_clean(); }; } } // If `variations` is a string, it's the name of a PHP file that // generates the variations. if ( ! empty( $metadata['variations'] ) && is_string( $metadata['variations'] ) ) { $variations_path = wp_normalize_path( realpath( dirname( $metadata['file'] ) . '/' . remove_block_asset_path_prefix( $metadata['variations'] ) ) ); if ( $variations_path ) { /** * Generates the list of block variations. * * @since 6.7.0 * * @return string Returns the list of block variations. */ $settings['variation_callback'] = static function () use ( $variations_path ) { $variations = require $variations_path; return $variations; }; // The block instance's `variations` field is only allowed to be an array // (of known block variations). We unset it so that the block instance will // provide a getter that returns the result of the `variation_callback` instead. unset( $settings['variations'] ); } } $settings = array_merge( $settings, $args ); $script_fields = array( 'editorScript' => 'editor_script_handles', 'script' => 'script_handles', 'viewScript' => 'view_script_handles', ); foreach ( $script_fields as $metadata_field_name => $settings_field_name ) { if ( ! empty( $settings[ $metadata_field_name ] ) ) { $metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ]; } if ( ! empty( $metadata[ $metadata_field_name ] ) ) { $scripts = $metadata[ $metadata_field_name ]; $processed_scripts = array(); if ( is_array( $scripts ) ) { for ( $index = 0; $index < count( $scripts ); $index++ ) { $result = register_block_script_handle( $metadata, $metadata_field_name, $index ); if ( $result ) { $processed_scripts[] = $result; } } } else { $result = register_block_script_handle( $metadata, $metadata_field_name ); if ( $result ) { $processed_scripts[] = $result; } } $settings[ $settings_field_name ] = $processed_scripts; } } $module_fields = array( 'viewScriptModule' => 'view_script_module_ids', ); foreach ( $module_fields as $metadata_field_name => $settings_field_name ) { if ( ! empty( $settings[ $metadata_field_name ] ) ) { $metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ]; } if ( ! empty( $metadata[ $metadata_field_name ] ) ) { $modules = $metadata[ $metadata_field_name ]; $processed_modules = array(); if ( is_array( $modules ) ) { for ( $index = 0; $index < count( $modules ); $index++ ) { $result = register_block_script_module_id( $metadata, $metadata_field_name, $index ); if ( $result ) { $processed_modules[] = $result; } } } else { $result = register_block_script_module_id( $metadata, $metadata_field_name ); if ( $result ) { $processed_modules[] = $result; } } $settings[ $settings_field_name ] = $processed_modules; } } $style_fields = array( 'editorStyle' => 'editor_style_handles', 'style' => 'style_handles', 'viewStyle' => 'view_style_handles', ); foreach ( $style_fields as $metadata_field_name => $settings_field_name ) { if ( ! empty( $settings[ $metadata_field_name ] ) ) { $metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ]; } if ( ! empty( $metadata[ $metadata_field_name ] ) ) { $styles = $metadata[ $metadata_field_name ]; $processed_styles = array(); if ( is_array( $styles ) ) { for ( $index = 0; $index < count( $styles ); $index++ ) { $result = register_block_style_handle( $metadata, $metadata_field_name, $index ); if ( $result ) { $processed_styles[] = $result; } } } else { $result = register_block_style_handle( $metadata, $metadata_field_name ); if ( $result ) { $processed_styles[] = $result; } } $settings[ $settings_field_name ] = $processed_styles; } } if ( ! empty( $metadata['blockHooks'] ) ) { /** * Map camelCased position string (from block.json) to snake_cased block type position. * * @var array */ $position_mappings = array( 'before' => 'before', 'after' => 'after', 'firstChild' => 'first_child', 'lastChild' => 'last_child', ); $settings['block_hooks'] = array(); foreach ( $metadata['blockHooks'] as $anchor_block_name => $position ) { // Avoid infinite recursion (hooking to itself). if ( $metadata['name'] === $anchor_block_name ) { _doing_it_wrong( __METHOD__, __( 'Cannot hook block to itself.' ), '6.4.0' ); continue; } if ( ! isset( $position_mappings[ $position ] ) ) { continue; } $settings['block_hooks'][ $anchor_block_name ] = $position_mappings[ $position ]; } } /** * Filters the settings determined from the block type metadata. * * @since 5.7.0 * * @param array $settings Array of determined settings for registering a block type. * @param array $metadata Metadata provided for registering a block type. */ $settings = apply_filters( 'block_type_metadata_settings', $settings, $metadata ); $metadata['name'] = ! empty( $settings['name'] ) ? $settings['name'] : $metadata['name']; return WP_Block_Type_Registry::get_instance()->register( $metadata['name'], $settings ); } /** * Registers a block type. The recommended way is to register a block type using * the metadata stored in the `block.json` file. * * @since 5.0.0 * @since 5.8.0 First parameter now accepts a path to the `block.json` file. * * @param string|WP_Block_Type $block_type Block type name including namespace, or alternatively * a path to the JSON file with metadata definition for the block, * or a path to the folder where the `block.json` file is located, * or a complete WP_Block_Type instance. * In case a WP_Block_Type is provided, the $args parameter will be ignored. * @param array $args Optional. Array of block type arguments. Accepts any public property * of `WP_Block_Type`. See WP_Block_Type::__construct() for information * on accepted arguments. Default empty array. * * @return WP_Block_Type|false The registered block type on success, or false on failure. */ function register_block_type( $block_type, $args = array() ) { if ( is_string( $block_type ) && file_exists( $block_type ) ) { return register_block_type_from_metadata( $block_type, $args ); } return WP_Block_Type_Registry::get_instance()->register( $block_type, $args ); } /** * Unregisters a block type. * * @since 5.0.0 * * @param string|WP_Block_Type $name Block type name including namespace, or alternatively * a complete WP_Block_Type instance. * @return WP_Block_Type|false The unregistered block type on success, or false on failure. */ function unregister_block_type( $name ) { return WP_Block_Type_Registry::get_instance()->unregister( $name ); } /** * Determines whether a post or content string has blocks. * * This test optimizes for performance rather than strict accuracy, detecting * the pattern of a block but not validating its structure. For strict accuracy, * you should use the block parser on post content. * * @since 5.0.0 * * @see parse_blocks() * * @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object. * Defaults to global $post. * @return bool Whether the post has blocks. */ function has_blocks( $post = null ) { if ( ! is_string( $post ) ) { $wp_post = get_post( $post ); if ( ! $wp_post instanceof WP_Post ) { return false; } $post = $wp_post->post_content; } return str_contains( (string) $post, '<!-- wp:' ); } /** * Determines whether a $post or a string contains a specific block type. * * This test optimizes for performance rather than strict accuracy, detecting * whether the block type exists but not validating its structure and not checking * synced patterns (formerly called reusable blocks). For strict accuracy, * you should use the block parser on post content. * * @since 5.0.0 * * @see parse_blocks() * * @param string $block_name Full block type to look for. * @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object. * Defaults to global $post. * @return bool Whether the post content contains the specified block. */ function has_block( $block_name, $post = null ) { if ( ! has_blocks( $post ) ) { return false; } if ( ! is_string( $post ) ) { $wp_post = get_post( $post ); if ( $wp_post instanceof WP_Post ) { $post = $wp_post->post_content; } } /* * Normalize block name to include namespace, if provided as non-namespaced. * This matches behavior for WordPress 5.0.0 - 5.3.0 in matching blocks by * their serialized names. */ if ( ! str_contains( $block_name, '/' ) ) { $block_name = 'core/' . $block_name; } // Test for existence of block by its fully qualified name. $has_block = str_contains( $post, '<!-- wp:' . $block_name . ' ' ); if ( ! $has_block ) { /* * If the given block name would serialize to a different name, test for * existence by the serialized form. */ $serialized_block_name = strip_core_block_namespace( $block_name ); if ( $serialized_block_name !== $block_name ) { $has_block = str_contains( $post, '<!-- wp:' . $serialized_block_name . ' ' ); } } return $has_block; } /** * Returns an array of the names of all registered dynamic block types. * * @since 5.0.0 * * @return string[] Array of dynamic block names. */ function get_dynamic_block_names() { $dynamic_block_names = array(); $block_types = WP_Block_Type_Registry::get_instance()->get_all_registered(); foreach ( $block_types as $block_type ) { if ( $block_type->is_dynamic() ) { $dynamic_block_names[] = $block_type->name; } } return $dynamic_block_names; } /** * Retrieves block types hooked into the given block, grouped by anchor block type and the relative position. * * @since 6.4.0 * * @return array[] Array of block types grouped by anchor block type and the relative position. */ function get_hooked_blocks() { $block_types = WP_Block_Type_Registry::get_instance()->get_all_registered(); $hooked_blocks = array(); foreach ( $block_types as $block_type ) { if ( ! ( $block_type instanceof WP_Block_Type ) || ! is_array( $block_type->block_hooks ) ) { continue; } foreach ( $block_type->block_hooks as $anchor_block_type => $relative_position ) { if ( ! isset( $hooked_blocks[ $anchor_block_type ] ) ) { $hooked_blocks[ $anchor_block_type ] = array(); } if ( ! isset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ) ) { $hooked_blocks[ $anchor_block_type ][ $relative_position ] = array(); } $hooked_blocks[ $anchor_block_type ][ $relative_position ][] = $block_type->name; } } return $hooked_blocks; } /** * Returns the markup for blocks hooked to the given anchor block in a specific relative position. * * @since 6.5.0 * @access private * * @param array $parsed_anchor_block The anchor block, in parsed block array format. * @param string $relative_position The relative position of the hooked blocks. * Can be one of 'before', 'after', 'first_child', or 'last_child'. * @param array $hooked_blocks An array of hooked block types, grouped by anchor block and relative position. * @param WP_Block_Template|WP_Post|array $context The block template, template part, or pattern that the anchor block belongs to. * @return string */ function insert_hooked_blocks( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) { $anchor_block_type = $parsed_anchor_block['blockName']; $hooked_block_types = isset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ) ? $hooked_blocks[ $anchor_block_type ][ $relative_position ] : array(); /** * Filters the list of hooked block types for a given anchor block type and relative position. * * @since 6.4.0 * * @param string[] $hooked_block_types The list of hooked block types. * @param string $relative_position The relative position of the hooked blocks. * Can be one of 'before', 'after', 'first_child', or 'last_child'. * @param string $anchor_block_type The anchor block type. * @param WP_Block_Template|WP_Post|array $context The block template, template part, post object, * or pattern that the anchor block belongs to. */ $hooked_block_types = apply_filters( 'hooked_block_types', $hooked_block_types, $relative_position, $anchor_block_type, $context ); $markup = ''; foreach ( $hooked_block_types as $hooked_block_type ) { $parsed_hooked_block = array( 'blockName' => $hooked_block_type, 'attrs' => array(), 'innerBlocks' => array(), 'innerContent' => array(), ); /** * Filters the parsed block array for a given hooked block. * * @since 6.5.0 * * @param array|null $parsed_hooked_block The parsed block array for the given hooked block type, or null to suppress the block. * @param string $hooked_block_type The hooked block type name. * @param string $relative_position The relative position of the hooked block. * @param array $parsed_anchor_block The anchor block, in parsed block array format. * @param WP_Block_Template|WP_Post|array $context The block template, template part, post object, * or pattern that the anchor block belongs to. */ $parsed_hooked_block = apply_filters( 'hooked_block', $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context ); /** * Filters the parsed block array for a given hooked block. * * The dynamic portion of the hook name, `$hooked_block_type`, refers to the block type name of the specific hooked block. * * @since 6.5.0 * * @param array|null $parsed_hooked_block The parsed block array for the given hooked block type, or null to suppress the block. * @param string $hooked_block_type The hooked block type name. * @param string $relative_position The relative position of the hooked block. * @param array $parsed_anchor_block The anchor block, in parsed block array format. * @param WP_Block_Template|WP_Post|array $context The block template, template part, post object, * or pattern that the anchor block belongs to. */ $parsed_hooked_block = apply_filters( "hooked_block_{$hooked_block_type}", $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context ); if ( null === $parsed_hooked_block ) { continue; } // It's possible that the filter returned a block of a different type, so we explicitly // look for the original `$hooked_block_type` in the `ignoredHookedBlocks` metadata. if ( ! isset( $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] ) || ! in_array( $hooked_block_type, $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'], true ) ) { $markup .= serialize_block( $parsed_hooked_block ); } } return $markup; } /** * Adds a list of hooked block types to an anchor block's ignored hooked block types. * * This function is meant for internal use only. * * @since 6.5.0 * @access private * * @param array $parsed_anchor_block The anchor block, in parsed block array format. * @param string $relative_position The relative position of the hooked blocks. * Can be one of 'before', 'after', 'first_child', or 'last_child'. * @param array $hooked_blocks An array of hooked block types, grouped by anchor block and relative position. * @param WP_Block_Template|WP_Post|array $context The block template, template part, or pattern that the anchor block belongs to. * @return string Empty string. */ function set_ignored_hooked_blocks_metadata( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) { $anchor_block_type = $parsed_anchor_block['blockName']; $hooked_block_types = isset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ) ? $hooked_blocks[ $anchor_block_type ][ $relative_position ] : array(); /** This filter is documented in wp-includes/blocks.php */ $hooked_block_types = apply_filters( 'hooked_block_types', $hooked_block_types, $relative_position, $anchor_block_type, $context ); if ( empty( $hooked_block_types ) ) { return ''; } foreach ( $hooked_block_types as $index => $hooked_block_type ) { $parsed_hooked_block = array( 'blockName' => $hooked_block_type, 'attrs' => array(), 'innerBlocks' => array(), 'innerContent' => array(), ); /** This filter is documented in wp-includes/blocks.php */ $parsed_hooked_block = apply_filters( 'hooked_block', $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context ); /** This filter is documented in wp-includes/blocks.php */ $parsed_hooked_block = apply_filters( "hooked_block_{$hooked_block_type}", $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context ); if ( null === $parsed_hooked_block ) { unset( $hooked_block_types[ $index ] ); } } $previously_ignored_hooked_blocks = isset( $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] ) ? $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] : array(); $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] = array_unique( array_merge( $previously_ignored_hooked_blocks, $hooked_block_types ) ); // Markup for the hooked blocks has already been created (in `insert_hooked_blocks`). return ''; } /** * Runs the hooked blocks algorithm on the given content. * * @since 6.6.0 * @since 6.7.0 Injects the `theme` attribute into Template Part blocks, even if no hooked blocks are registered. * @since 6.8.0 Have the `$context` parameter default to `null`, in which case `get_post()` will be called to use the current post as context. * @access private * * @param string $content Serialized content. * @param WP_Block_Template|WP_Post|array|null $context A block template, template part, post object, or pattern * that the blocks belong to. If set to `null`, `get_post()` * will be called to use the current post as context. * Default: `null`. * @param callable $callback A function that will be called for each block to generate * the markup for a given list of blocks that are hooked to it. * Default: 'insert_hooked_blocks'. * @return string The serialized markup. */ function apply_block_hooks_to_content( $content, $context = null, $callback = 'insert_hooked_blocks' ) { // Default to the current post if no context is provided. if ( null === $context ) { $context = get_post(); } $hooked_blocks = get_hooked_blocks(); $before_block_visitor = '_inject_theme_attribute_in_template_part_block'; $after_block_visitor = null; if ( ! empty( $hooked_blocks ) || has_filter( 'hooked_block_types' ) ) { $before_block_visitor = make_before_block_visitor( $hooked_blocks, $context, $callback ); $after_block_visitor = make_after_block_visitor( $hooked_blocks, $context, $callback ); } $block_allows_multiple_instances = array(); /* * Remove hooked blocks from `$hooked_block_types` if they have `multiple` set to false and * are already present in `$content`. */ foreach ( $hooked_blocks as $anchor_block_type => $relative_positions ) { foreach ( $relative_positions as $relative_position => $hooked_block_types ) { foreach ( $hooked_block_types as $index => $hooked_block_type ) { $hooked_block_type_definition = WP_Block_Type_Registry::get_instance()->get_registered( $hooked_block_type ); $block_allows_multiple_instances[ $hooked_block_type ] = block_has_support( $hooked_block_type_definition, 'multiple', true ); if ( ! $block_allows_multiple_instances[ $hooked_block_type ] && has_block( $hooked_block_type, $content ) ) { unset( $hooked_blocks[ $anchor_block_type ][ $relative_position ][ $index ] ); } } if ( empty( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ) ) { unset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ); } } if ( empty( $hooked_blocks[ $anchor_block_type ] ) ) { unset( $hooked_blocks[ $anchor_block_type ] ); } } /* * We also need to cover the case where the hooked block is not present in * `$content` at first and we're allowed to insert it once -- but not again. */ $suppress_single_instance_blocks = static function ( $hooked_block_types ) use ( &$block_allows_multiple_instances, $content ) { static $single_instance_blocks_present_in_content = array(); foreach ( $hooked_block_types as $index => $hooked_block_type ) { if ( ! isset( $block_allows_multiple_instances[ $hooked_block_type ] ) ) { $hooked_block_type_definition = WP_Block_Type_Registry::get_instance()->get_registered( $hooked_block_type ); $block_allows_multiple_instances[ $hooked_block_type ] = block_has_support( $hooked_block_type_definition, 'multiple', true ); } if ( $block_allows_multiple_instances[ $hooked_block_type ] ) { continue; } // The block doesn't allow multiple instances, so we need to check if it's already present. if ( in_array( $hooked_block_type, $single_instance_blocks_present_in_content, true ) || has_block( $hooked_block_type, $content ) ) { unset( $hooked_block_types[ $index ] ); } else { // We can insert the block once, but need to remember not to insert it again. $single_instance_blocks_present_in_content[] = $hooked_block_type; } } return $hooked_block_types; }; add_filter( 'hooked_block_types', $suppress_single_instance_blocks, PHP_INT_MAX ); $content = traverse_and_serialize_blocks( parse_blocks( $content ), $before_block_visitor, $after_block_visitor ); remove_filter( 'hooked_block_types', $suppress_single_instance_blocks, PHP_INT_MAX ); return $content; } /** * Run the Block Hooks algorithm on a post object's content. * * This function is different from `apply_block_hooks_to_content` in that * it takes ignored hooked block information from the post's metadata into * account. This ensures that any blocks hooked as first or last child * of the block that corresponds to the post type are handled correctly. * * @since 6.8.0 * @access private * * @param string $content Serialized content. * @param WP_Post|null $post A post object that the content belongs to. If set to `null`, * `get_post()` will be called to use the current post as context. * Default: `null`. * @param callable $callback A function that will be called for each block to generate * the markup for a given list of blocks that are hooked to it. * Default: 'insert_hooked_blocks'. * @return string The serialized markup. */ function apply_block_hooks_to_content_from_post_object( $content, $post = null, $callback = 'insert_hooked_blocks' ) { // Default to the current post if no context is provided. if ( null === $post ) { $post = get_post(); } if ( ! $post instanceof WP_Post ) { return apply_block_hooks_to_content( $content, $post, $callback ); } /* * If the content was created using the classic editor or using a single Classic block * (`core/freeform`), it might not contain any block markup at all. * However, we still might need to inject hooked blocks in the first child or last child * positions of the parent block. To be able to apply the Block Hooks algorithm, we wrap * the content in a `core/freeform` wrapper block. */ if ( ! has_blocks( $content ) ) { $original_content = $content; $content_wrapped_in_classic_block = get_comment_delimited_block_content( 'core/freeform', array(), $content ); $content = $content_wrapped_in_classic_block; } $attributes = array(); // If context is a post object, `ignoredHookedBlocks` information is stored in its post meta. $ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true ); if ( ! empty( $ignored_hooked_blocks ) ) { $ignored_hooked_blocks = json_decode( $ignored_hooked_blocks, true ); $attributes['metadata'] = array( 'ignoredHookedBlocks' => $ignored_hooked_blocks, ); } /* * We need to wrap the content in a temporary wrapper block with that metadata * so the Block Hooks algorithm can insert blocks that are hooked as first or last child * of the wrapper block. * To that end, we need to determine the wrapper block type based on the post type. */ if ( 'wp_navigation' === $post->post_type ) { $wrapper_block_type = 'core/navigation'; } elseif ( 'wp_block' === $post->post_type ) { $wrapper_block_type = 'core/block'; } else { $wrapper_block_type = 'core/post-content'; } $content = get_comment_delimited_block_content( $wrapper_block_type, $attributes, $content ); /* * We need to avoid inserting any blocks hooked into the `before` and `after` positions * of the temporary wrapper block that we create to wrap the content. * See https://core.trac.wordpress.org/ticket/63287 for more details. */ $suppress_blocks_from_insertion_before_and_after_wrapper_block = static function ( $hooked_block_types, $relative_position, $anchor_block_type ) use ( $wrapper_block_type ) { if ( $wrapper_block_type === $anchor_block_type && in_array( $relative_position, array( 'before', 'after' ), true ) ) { return array(); } return $hooked_block_types; }; // Apply Block Hooks. add_filter( 'hooked_block_types', $suppress_blocks_from_insertion_before_and_after_wrapper_block, PHP_INT_MAX, 3 ); $content = apply_block_hooks_to_content( $content, $post, $callback ); remove_filter( 'hooked_block_types', $suppress_blocks_from_insertion_before_and_after_wrapper_block, PHP_INT_MAX ); // Finally, we need to remove the temporary wrapper block. $content = remove_serialized_parent_block( $content ); // If we wrapped the content in a `core/freeform` block, we also need to remove that. if ( ! empty( $content_wrapped_in_classic_block ) ) { /* * We cannot simply use remove_serialized_parent_block() here, * as that function assumes that the block wrapper is at the top level. * However, there might now be a hooked block inserted next to it * (as first or last child of the parent). */ $content = str_replace( $content_wrapped_in_classic_block, $original_content, $content ); } return $content; } /** * Accepts the serialized markup of a block and its inner blocks, and returns serialized markup of the inner blocks. * * @since 6.6.0 * @access private * * @param string $serialized_block The serialized markup of a block and its inner blocks. * @return string The serialized markup of the inner blocks. */ function remove_serialized_parent_block( $serialized_block ) { $start = strpos( $serialized_block, '-->' ) + strlen( '-->' ); $end = strrpos( $serialized_block, '<!--' ); return substr( $serialized_block, $start, $end - $start ); } /** * Accepts the serialized markup of a block and its inner blocks, and returns serialized markup of the wrapper block. * * @since 6.7.0 * @access private * * @see remove_serialized_parent_block() * * @param string $serialized_block The serialized markup of a block and its inner blocks. * @return string The serialized markup of the wrapper block. */ function extract_serialized_parent_block( $serialized_block ) { $start = strpos( $serialized_block, '-->' ) + strlen( '-->' ); $end = strrpos( $serialized_block, '<!--' ); return substr( $serialized_block, 0, $start ) . substr( $serialized_block, $end ); } /** * Updates the wp_postmeta with the list of ignored hooked blocks * where the inner blocks are stored as post content. * * @since 6.6.0 * @since 6.8.0 Support non-`wp_navigation` post types. * @access private * * @param stdClass $post Post object. * @return stdClass The updated post object. */ function update_ignored_hooked_blocks_postmeta( $post ) { /* * In this scenario the user has likely tried to create a new post object via the REST API. * In which case we won't have a post ID to work with and store meta against. */ if ( empty( $post->ID ) ) { return $post; } /* * Skip meta generation when consumers intentionally update specific fields * and omit the content update. */ if ( ! isset( $post->post_content ) ) { return $post; } /* * Skip meta generation if post type is not set. */ if ( ! isset( $post->post_type ) ) { return $post; } $attributes = array(); $ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true ); if ( ! empty( $ignored_hooked_blocks ) ) { $ignored_hooked_blocks = json_decode( $ignored_hooked_blocks, true ); $attributes['metadata'] = array( 'ignoredHookedBlocks' => $ignored_hooked_blocks, ); } if ( 'wp_navigation' === $post->post_type ) { $wrapper_block_type = 'core/navigation'; } elseif ( 'wp_block' === $post->post_type ) { $wrapper_block_type = 'core/block'; } else { $wrapper_block_type = 'core/post-content'; } $markup = get_comment_delimited_block_content( $wrapper_block_type, $attributes, $post->post_content ); $existing_post = get_post( $post->ID ); // Merge the existing post object with the updated post object to pass to the block hooks algorithm for context. $context = (object) array_merge( (array) $existing_post, (array) $post ); $context = new WP_Post( $context ); // Convert to WP_Post object. $serialized_block = apply_block_hooks_to_content( $markup, $context, 'set_ignored_hooked_blocks_metadata' ); $root_block = parse_blocks( $serialized_block )[0]; $ignored_hooked_blocks = isset( $root_block['attrs']['metadata']['ignoredHookedBlocks'] ) ? $root_block['attrs']['metadata']['ignoredHookedBlocks'] : array(); if ( ! empty( $ignored_hooked_blocks ) ) { $existing_ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true ); if ( ! empty( $existing_ignored_hooked_blocks ) ) { $existing_ignored_hooked_blocks = json_decode( $existing_ignored_hooked_blocks, true ); $ignored_hooked_blocks = array_unique( array_merge( $ignored_hooked_blocks, $existing_ignored_hooked_blocks ) ); } if ( ! isset( $post->meta_input ) ) { $post->meta_input = array(); } $post->meta_input['_wp_ignored_hooked_blocks'] = json_encode( $ignored_hooked_blocks ); } $post->post_content = remove_serialized_parent_block( $serialized_block ); return $post; } /** * Returns the markup for blocks hooked to the given anchor block in a specific relative position and then * adds a list of hooked block types to an anchor block's ignored hooked block types. * * This function is meant for internal use only. * * @since 6.6.0 * @access private * * @param array $parsed_anchor_block The anchor block, in parsed block array format. * @param string $relative_position The relative position of the hooked blocks. * Can be one of 'before', 'after', 'first_child', or 'last_child'. * @param array $hooked_blocks An array of hooked block types, grouped by anchor block and relative position. * @param WP_Block_Template|WP_Post|array $context The block template, template part, or pattern that the anchor block belongs to. * @return string */ function insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) { $markup = insert_hooked_blocks( $parsed_anchor_block, $relative_position, $hooked_blocks, $context ); $markup .= set_ignored_hooked_blocks_metadata( $parsed_anchor_block, $relative_position, $hooked_blocks, $context ); return $markup; } /** * Hooks into the REST API response for the Posts endpoint and adds the first and last inner blocks. * * @since 6.6.0 * @since 6.8.0 Support non-`wp_navigation` post types. * * @param WP_REST_Response $response The response object. * @param WP_Post $post Post object. * @return WP_REST_Response The response object. */ function insert_hooked_blocks_into_rest_response( $response, $post ) { if ( empty( $response->data['content']['raw'] ) ) { return $response; } $response->data['content']['raw'] = apply_block_hooks_to_content_from_post_object( $response->data['content']['raw'], $post, 'insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata' ); // If the rendered content was previously empty, we leave it like that. if ( empty( $response->data['content']['rendered'] ) ) { return $response; } // `apply_block_hooks_to_content` is called above. Ensure it is not called again as a filter. $priority = has_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object' ); if ( false !== $priority ) { remove_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object', $priority ); } /** This filter is documented in wp-includes/post-template.php */ $response->data['content']['rendered'] = apply_filters( 'the_content', $response->data['content']['raw'] ); // Restore the filter if it was set initially. if ( false !== $priority ) { add_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object', $priority ); } return $response; } /** * Returns a function that injects the theme attribute into, and hooked blocks before, a given block. * * The returned function can be used as `$pre_callback` argument to `traverse_and_serialize_block(s)`, * where it will inject the `theme` attribute into all Template Part blocks, and prepend the markup for * any blocks hooked `before` the given block and as its parent's `first_child`, respectively. * * This function is meant for internal use only. * * @since 6.4.0 * @since 6.5.0 Added $callback argument. * @access private * * @param array $hooked_blocks An array of blocks hooked to another given block. * @param WP_Block_Template|WP_Post|array $context A block template, template part, post object, * or pattern that the blocks belong to. * @param callable $callback A function that will be called for each block to generate * the markup for a given list of blocks that are hooked to it. * Default: 'insert_hooked_blocks'. * @return callable A function that returns the serialized markup for the given block, * including the markup for any hooked blocks before it. */ function make_before_block_visitor( $hooked_blocks, $context, $callback = 'insert_hooked_blocks' ) { /** * Injects hooked blocks before the given block, injects the `theme` attribute into Template Part blocks, and returns the serialized markup. * * If the current block is a Template Part block, inject the `theme` attribute. * Furthermore, prepend the markup for any blocks hooked `before` the given block and as its parent's * `first_child`, respectively, to the serialized markup for the given block. * * @param array $block The block to inject the theme attribute into, and hooked blocks before. Passed by reference. * @param array $parent_block The parent block of the given block. Passed by reference. Default null. * @param array $prev The previous sibling block of the given block. Default null. * @return string The serialized markup for the given block, with the markup for any hooked blocks prepended to it. */ return function ( &$block, &$parent_block = null, $prev = null ) use ( $hooked_blocks, $context, $callback ) { _inject_theme_attribute_in_template_part_block( $block ); $markup = ''; if ( $parent_block && ! $prev ) { // Candidate for first-child insertion. $markup .= call_user_func_array( $callback, array( &$parent_block, 'first_child', $hooked_blocks, $context ) ); } $markup .= call_user_func_array( $callback, array( &$block, 'before', $hooked_blocks, $context ) ); return $markup; }; } /** * Returns a function that injects the hooked blocks after a given block. * * The returned function can be used as `$post_callback` argument to `traverse_and_serialize_block(s)`, * where it will append the markup for any blocks hooked `after` the given block and as its parent's * `last_child`, respectively. * * This function is meant for internal use only. * * @since 6.4.0 * @since 6.5.0 Added $callback argument. * @access private * * @param array $hooked_blocks An array of blocks hooked to another block. * @param WP_Block_Template|WP_Post|array $context A block template, template part, post object, * or pattern that the blocks belong to. * @param callable $callback A function that will be called for each block to generate * the markup for a given list of blocks that are hooked to it. * Default: 'insert_hooked_blocks'. * @return callable A function that returns the serialized markup for the given block, * including the markup for any hooked blocks after it. */ function make_after_block_visitor( $hooked_blocks, $context, $callback = 'insert_hooked_blocks' ) { /** * Injects hooked blocks after the given block, and returns the serialized markup. * * Append the markup for any blocks hooked `after` the given block and as its parent's * `last_child`, respectively, to the serialized markup for the given block. * * @param array $block The block to inject the hooked blocks after. Passed by reference. * @param array $parent_block The parent block of the given block. Passed by reference. Default null. * @param array $next The next sibling block of the given block. Default null. * @return string The serialized markup for the given block, with the markup for any hooked blocks appended to it. */ return function ( &$block, &$parent_block = null, $next = null ) use ( $hooked_blocks, $context, $callback ) { $markup = call_user_func_array( $callback, array( &$block, 'after', $hooked_blocks, $context ) ); if ( $parent_block && ! $next ) { // Candidate for last-child insertion. $markup .= call_user_func_array( $callback, array( &$parent_block, 'last_child', $hooked_blocks, $context ) ); } return $markup; }; } /** * Given an array of attributes, returns a string in the serialized attributes * format prepared for post content. * * The serialized result is a JSON-encoded string, with unicode escape sequence * substitution for characters which might otherwise interfere with embedding * the result in an HTML comment. * * This function must produce output that remains in sync with the output of * the serializeAttributes JavaScript function in the block editor in order * to ensure consistent operation between PHP and JavaScript. * * @since 5.3.1 * * @param array $block_attributes Attributes object. * @return string Serialized attributes. */ function serialize_block_attributes( $block_attributes ) { $encoded_attributes = wp_json_encode( $block_attributes, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE ); $encoded_attributes = preg_replace( '/--/', '\\u002d\\u002d', $encoded_attributes ); $encoded_attributes = preg_replace( '/</', '\\u003c', $encoded_attributes ); $encoded_attributes = preg_replace( '/>/', '\\u003e', $encoded_attributes ); $encoded_attributes = preg_replace( '/&/', '\\u0026', $encoded_attributes ); // Regex: /\\"/ $encoded_attributes = preg_replace( '/\\\\"/', '\\u0022', $encoded_attributes ); return $encoded_attributes; } /** * Returns the block name to use for serialization. This will remove the default * "core/" namespace from a block name. * * @since 5.3.1 * * @param string|null $block_name Optional. Original block name. Null if the block name is unknown, * e.g. Classic blocks have their name set to null. Default null. * @return string Block name to use for serialization. */ function strip_core_block_namespace( $block_name = null ) { if ( is_string( $block_name ) && str_starts_with( $block_name, 'core/' ) ) { return substr( $block_name, 5 ); } return $block_name; } /** * Returns the content of a block, including comment delimiters. * * @since 5.3.1 * * @param string|null $block_name Block name. Null if the block name is unknown, * e.g. Classic blocks have their name set to null. * @param array $block_attributes Block attributes. * @param string $block_content Block save content. * @return string Comment-delimited block content. */ function get_comment_delimited_block_content( $block_name, $block_attributes, $block_content ) { if ( is_null( $block_name ) ) { return $block_content; } $serialized_block_name = strip_core_block_namespace( $block_name ); $serialized_attributes = empty( $block_attributes ) ? '' : serialize_block_attributes( $block_attributes ) . ' '; if ( empty( $block_content ) ) { return sprintf( '<!-- wp:%s %s/-->', $serialized_block_name, $serialized_attributes ); } return sprintf( '<!-- wp:%s %s-->%s<!-- /wp:%s -->', $serialized_block_name, $serialized_attributes, $block_content, $serialized_block_name ); } /** * Returns the content of a block, including comment delimiters, serializing all * attributes from the given parsed block. * * This should be used when preparing a block to be saved to post content. * Prefer `render_block` when preparing a block for display. Unlike * `render_block`, this does not evaluate a block's `render_callback`, and will * instead preserve the markup as parsed. * * @since 5.3.1 * * @param array $block { * An associative array of a single parsed block object. See WP_Block_Parser_Block. * * @type string $blockName Name of block. * @type array $attrs Attributes from block comment delimiters. * @type array[] $innerBlocks List of inner blocks. An array of arrays that * have the same structure as this one. * @type string $innerHTML HTML from inside block comment delimiters. * @type array $innerContent List of string fragments and null markers where * inner blocks were found. * } * @return string String of rendered HTML. */ function serialize_block( $block ) { $block_content = ''; $index = 0; foreach ( $block['innerContent'] as $chunk ) { $block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ] ); } if ( ! is_array( $block['attrs'] ) ) { $block['attrs'] = array(); } return get_comment_delimited_block_content( $block['blockName'], $block['attrs'], $block_content ); } /** * Returns a joined string of the aggregate serialization of the given * parsed blocks. * * @since 5.3.1 * * @param array[] $blocks { * Array of block structures. * * @type array ...$0 { * An associative array of a single parsed block object. See WP_Block_Parser_Block. * * @type string $blockName Name of block. * @type array $attrs Attributes from block comment delimiters. * @type array[] $innerBlocks List of inner blocks. An array of arrays that * have the same structure as this one. * @type string $innerHTML HTML from inside block comment delimiters. * @type array $innerContent List of string fragments and null markers where * inner blocks were found. * } * } * @return string String of rendered HTML. */ function serialize_blocks( $blocks ) { return implode( '', array_map( 'serialize_block', $blocks ) ); } /** * Traverses a parsed block tree and applies callbacks before and after serializing it. * * Recursively traverses the block and its inner blocks and applies the two callbacks provided as * arguments, the first one before serializing the block, and the second one after serializing it. * If either callback returns a string value, it will be prepended and appended to the serialized * block markup, respectively. * * The callbacks will receive a reference to the current block as their first argument, so that they * can also modify it, and the current block's parent block as second argument. Finally, the * `$pre_callback` receives the previous block, whereas the `$post_callback` receives * the next block as third argument. * * Serialized blocks are returned including comment delimiters, and with all attributes serialized. * * This function should be used when there is a need to modify the saved block, or to inject markup * into the return value. Prefer `serialize_block` when preparing a block to be saved to post content. * * This function is meant for internal use only. * * @since 6.4.0 * @access private * * @see serialize_block() * * @param array $block An associative array of a single parsed block object. See WP_Block_Parser_Block. * @param callable $pre_callback Callback to run on each block in the tree before it is traversed and serialized. * It is called with the following arguments: &$block, $parent_block, $previous_block. * Its string return value will be prepended to the serialized block markup. * @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized. * It is called with the following arguments: &$block, $parent_block, $next_block. * Its string return value will be appended to the serialized block markup. * @return string Serialized block markup. */ function traverse_and_serialize_block( $block, $pre_callback = null, $post_callback = null ) { $block_content = ''; $block_index = 0; foreach ( $block['innerContent'] as $chunk ) { if ( is_string( $chunk ) ) { $block_content .= $chunk; } else { $inner_block = $block['innerBlocks'][ $block_index ]; if ( is_callable( $pre_callback ) ) { $prev = 0 === $block_index ? null : $block['innerBlocks'][ $block_index - 1 ]; $block_content .= call_user_func_array( $pre_callback, array( &$inner_block, &$block, $prev ) ); } if ( is_callable( $post_callback ) ) { $next = count( $block['innerBlocks'] ) - 1 === $block_index ? null : $block['innerBlocks'][ $block_index + 1 ]; $post_markup = call_user_func_array( $post_callback, array( &$inner_block, &$block, $next ) ); } $block_content .= traverse_and_serialize_block( $inner_block, $pre_callback, $post_callback ); $block_content .= isset( $post_markup ) ? $post_markup : ''; ++$block_index; } } if ( ! is_array( $block['attrs'] ) ) { $block['attrs'] = array(); } return get_comment_delimited_block_content( $block['blockName'], $block['attrs'], $block_content ); } /** * Replaces patterns in a block tree with their content. * * @since 6.6.0 * * @param array $blocks An array blocks. * * @return array An array of blocks with patterns replaced by their content. */ function resolve_pattern_blocks( $blocks ) { static $inner_content; // Keep track of seen references to avoid infinite loops. static $seen_refs = array(); $i = 0; while ( $i < count( $blocks ) ) { if ( 'core/pattern' === $blocks[ $i ]['blockName'] ) { $attrs = $blocks[ $i ]['attrs']; if ( empty( $attrs['slug'] ) ) { ++$i; continue; } $slug = $attrs['slug']; if ( isset( $seen_refs[ $slug ] ) ) { // Skip recursive patterns. array_splice( $blocks, $i, 1 ); continue; } $registry = WP_Block_Patterns_Registry::get_instance(); $pattern = $registry->get_registered( $slug ); // Skip unknown patterns. if ( ! $pattern ) { ++$i; continue; } $blocks_to_insert = parse_blocks( $pattern['content'] ); $seen_refs[ $slug ] = true; $prev_inner_content = $inner_content; $inner_content = null; $blocks_to_insert = resolve_pattern_blocks( $blocks_to_insert ); $inner_content = $prev_inner_content; unset( $seen_refs[ $slug ] ); array_splice( $blocks, $i, 1, $blocks_to_insert ); // If we have inner content, we need to insert nulls in the // inner content array, otherwise serialize_blocks will skip // blocks. if ( $inner_content ) { $null_indices = array_keys( $inner_content, null, true ); $content_index = $null_indices[ $i ]; $nulls = array_fill( 0, count( $blocks_to_insert ), null ); array_splice( $inner_content, $content_index, 1, $nulls ); } // Skip inserted blocks. $i += count( $blocks_to_insert ); } else { if ( ! empty( $blocks[ $i ]['innerBlocks'] ) ) { $prev_inner_content = $inner_content; $inner_content = $blocks[ $i ]['innerContent']; $blocks[ $i ]['innerBlocks'] = resolve_pattern_blocks( $blocks[ $i ]['innerBlocks'] ); $blocks[ $i ]['innerContent'] = $inner_content; $inner_content = $prev_inner_content; } ++$i; } } return $blocks; } /** * Given an array of parsed block trees, applies callbacks before and after serializing them and * returns their concatenated output. * * Recursively traverses the blocks and their inner blocks and applies the two callbacks provided as * arguments, the first one before serializing a block, and the second one after serializing. * If either callback returns a string value, it will be prepended and appended to the serialized * block markup, respectively. * * The callbacks will receive a reference to the current block as their first argument, so that they * can also modify it, and the current block's parent block as second argument. Finally, the * `$pre_callback` receives the previous block, whereas the `$post_callback` receives * the next block as third argument. * * Serialized blocks are returned including comment delimiters, and with all attributes serialized. * * This function should be used when there is a need to modify the saved blocks, or to inject markup * into the return value. Prefer `serialize_blocks` when preparing blocks to be saved to post content. * * This function is meant for internal use only. * * @since 6.4.0 * @access private * * @see serialize_blocks() * * @param array[] $blocks An array of parsed blocks. See WP_Block_Parser_Block. * @param callable $pre_callback Callback to run on each block in the tree before it is traversed and serialized. * It is called with the following arguments: &$block, $parent_block, $previous_block. * Its string return value will be prepended to the serialized block markup. * @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized. * It is called with the following arguments: &$block, $parent_block, $next_block. * Its string return value will be appended to the serialized block markup. * @return string Serialized block markup. */ function traverse_and_serialize_blocks( $blocks, $pre_callback = null, $post_callback = null ) { $result = ''; $parent_block = null; // At the top level, there is no parent block to pass to the callbacks; yet the callbacks expect a reference. $pre_callback_is_callable = is_callable( $pre_callback ); $post_callback_is_callable = is_callable( $post_callback ); foreach ( $blocks as $index => $block ) { if ( $pre_callback_is_callable ) { $prev = 0 === $index ? null : $blocks[ $index - 1 ]; $result .= call_user_func_array( $pre_callback, array( &$block, &$parent_block, $prev ) ); } if ( $post_callback_is_callable ) { $next = count( $blocks ) - 1 === $index ? null : $blocks[ $index + 1 ]; $post_markup = call_user_func_array( $post_callback, array( &$block, &$parent_block, $next ) ); } $result .= traverse_and_serialize_block( $block, $pre_callback, $post_callback ); $result .= isset( $post_markup ) ? $post_markup : ''; } return $result; } /** * Filters and sanitizes block content to remove non-allowable HTML * from parsed block attribute values. * * @since 5.3.1 * * @param string $text Text that may contain block content. * @param array[]|string $allowed_html Optional. An array of allowed HTML elements and attributes, * or a context name such as 'post'. See wp_kses_allowed_html() * for the list of accepted context names. Default 'post'. * @param string[] $allowed_protocols Optional. Array of allowed URL protocols. * Defaults to the result of wp_allowed_protocols(). * @return string The filtered and sanitized content result. */ function filter_block_content( $text, $allowed_html = 'post', $allowed_protocols = array() ) { $result = ''; if ( str_contains( $text, '<!--' ) && str_contains( $text, '--->' ) ) { $text = preg_replace_callback( '%<!--(.*?)--->%', '_filter_block_content_callback', $text ); } $blocks = parse_blocks( $text ); foreach ( $blocks as $block ) { $block = filter_block_kses( $block, $allowed_html, $allowed_protocols ); $result .= serialize_block( $block ); } return $result; } /** * Callback used for regular expression replacement in filter_block_content(). * * @since 6.2.1 * @access private * * @param array $matches Array of preg_replace_callback matches. * @return string Replacement string. */ function _filter_block_content_callback( $matches ) { return '<!--' . rtrim( $matches[1], '-' ) . '-->'; } /** * Filters and sanitizes a parsed block to remove non-allowable HTML * from block attribute values. * * @since 5.3.1 * * @param WP_Block_Parser_Block $block The parsed block object. * @param array[]|string $allowed_html An array of allowed HTML elements and attributes, * or a context name such as 'post'. See wp_kses_allowed_html() * for the list of accepted context names. * @param string[] $allowed_protocols Optional. Array of allowed URL protocols. * Defaults to the result of wp_allowed_protocols(). * @return array The filtered and sanitized block object result. */ function filter_block_kses( $block, $allowed_html, $allowed_protocols = array() ) { $block['attrs'] = filter_block_kses_value( $block['attrs'], $allowed_html, $allowed_protocols, $block ); if ( is_array( $block['innerBlocks'] ) ) { foreach ( $block['innerBlocks'] as $i => $inner_block ) { $block['innerBlocks'][ $i ] = filter_block_kses( $inner_block, $allowed_html, $allowed_protocols ); } } return $block; } /** * Filters and sanitizes a parsed block attribute value to remove * non-allowable HTML. * * @since 5.3.1 * @since 6.5.5 Added the `$block_context` parameter. * * @param string[]|string $value The attribute value to filter. * @param array[]|string $allowed_html An array of allowed HTML elements and attributes, * or a context name such as 'post'. See wp_kses_allowed_html() * for the list of accepted context names. * @param string[] $allowed_protocols Optional. Array of allowed URL protocols. * Defaults to the result of wp_allowed_protocols(). * @param array $block_context Optional. The block the attribute belongs to, in parsed block array format. * @return string[]|string The filtered and sanitized result. */ function filter_block_kses_value( $value, $allowed_html, $allowed_protocols = array(), $block_context = null ) { if ( is_array( $value ) ) { foreach ( $value as $key => $inner_value ) { $filtered_key = filter_block_kses_value( $key, $allowed_html, $allowed_protocols, $block_context ); $filtered_value = filter_block_kses_value( $inner_value, $allowed_html, $allowed_protocols, $block_context ); if ( isset( $block_context['blockName'] ) && 'core/template-part' === $block_context['blockName'] ) { $filtered_value = filter_block_core_template_part_attributes( $filtered_value, $filtered_key, $allowed_html ); } if ( $filtered_key !== $key ) { unset( $value[ $key ] ); } $value[ $filtered_key ] = $filtered_value; } } elseif ( is_string( $value ) ) { return wp_kses( $value, $allowed_html, $allowed_protocols ); } return $value; } /** * Sanitizes the value of the Template Part block's `tagName` attribute. * * @since 6.5.5 * * @param string $attribute_value The attribute value to filter. * @param string $attribute_name The attribute name. * @param array[]|string $allowed_html An array of allowed HTML elements and attributes, * or a context name such as 'post'. See wp_kses_allowed_html() * for the list of accepted context names. * @return string The sanitized attribute value. */ function filter_block_core_template_part_attributes( $attribute_value, $attribute_name, $allowed_html ) { if ( empty( $attribute_value ) || 'tagName' !== $attribute_name ) { return $attribute_value; } if ( ! is_array( $allowed_html ) ) { $allowed_html = wp_kses_allowed_html( $allowed_html ); } return isset( $allowed_html[ $attribute_value ] ) ? $attribute_value : ''; } /** * Parses blocks out of a content string, and renders those appropriate for the excerpt. * * As the excerpt should be a small string of text relevant to the full post content, * this function renders the blocks that are most likely to contain such text. * * @since 5.0.0 * * @param string $content The content to parse. * @return string The parsed and filtered content. */ function excerpt_remove_blocks( $content ) { if ( ! has_blocks( $content ) ) { return $content; } $allowed_inner_blocks = array( // Classic blocks have their blockName set to null. null, 'core/freeform', 'core/heading', 'core/html', 'core/list', 'core/media-text', 'core/paragraph', 'core/preformatted', 'core/pullquote', 'core/quote', 'core/table', 'core/verse', ); $allowed_wrapper_blocks = array( 'core/columns', 'core/column', 'core/group', ); /** * Filters the list of blocks that can be used as wrapper blocks, allowing * excerpts to be generated from the `innerBlocks` of these wrappers. * * @since 5.8.0 * * @param string[] $allowed_wrapper_blocks The list of names of allowed wrapper blocks. */ $allowed_wrapper_blocks = apply_filters( 'excerpt_allowed_wrapper_blocks', $allowed_wrapper_blocks ); $allowed_blocks = array_merge( $allowed_inner_blocks, $allowed_wrapper_blocks ); /** * Filters the list of blocks that can contribute to the excerpt. * * If a dynamic block is added to this list, it must not generate another * excerpt, as this will cause an infinite loop to occur. * * @since 5.0.0 * * @param string[] $allowed_blocks The list of names of allowed blocks. */ $allowed_blocks = apply_filters( 'excerpt_allowed_blocks', $allowed_blocks ); $blocks = parse_blocks( $content ); $output = ''; foreach ( $blocks as $block ) { if ( in_array( $block['blockName'], $allowed_blocks, true ) ) { if ( ! empty( $block['innerBlocks'] ) ) { if ( in_array( $block['blockName'], $allowed_wrapper_blocks, true ) ) { $output .= _excerpt_render_inner_blocks( $block, $allowed_blocks ); continue; } // Skip the block if it has disallowed or nested inner blocks. foreach ( $block['innerBlocks'] as $inner_block ) { if ( ! in_array( $inner_block['blockName'], $allowed_inner_blocks, true ) || ! empty( $inner_block['innerBlocks'] ) ) { continue 2; } } } $output .= render_block( $block ); } } return $output; } /** * Parses footnotes markup out of a content string, * and renders those appropriate for the excerpt. * * @since 6.3.0 * * @param string $content The content to parse. * @return string The parsed and filtered content. */ function excerpt_remove_footnotes( $content ) { if ( ! str_contains( $content, 'data-fn=' ) ) { return $content; } return preg_replace( '_<sup data-fn="[^"]+" class="[^"]+">\s*<a href="[^"]+" id="[^"]+">\d+</a>\s*</sup>_', '', $content ); } /** * Renders inner blocks from the allowed wrapper blocks * for generating an excerpt. * * @since 5.8.0 * @access private * * @param array $parsed_block The parsed block. * @param array $allowed_blocks The list of allowed inner blocks. * @return string The rendered inner blocks. */ function _excerpt_render_inner_blocks( $parsed_block, $allowed_blocks ) { $output = ''; foreach ( $parsed_block['innerBlocks'] as $inner_block ) { if ( ! in_array( $inner_block['blockName'], $allowed_blocks, true ) ) { continue; } if ( empty( $inner_block['innerBlocks'] ) ) { $output .= render_block( $inner_block ); } else { $output .= _excerpt_render_inner_blocks( $inner_block, $allowed_blocks ); } } return $output; } /** * Renders a single block into a HTML string. * * @since 5.0.0 * * @global WP_Post $post The post to edit. * * @param array $parsed_block { * An associative array of the block being rendered. See WP_Block_Parser_Block. * * @type string $blockName Name of block. * @type array $attrs Attributes from block comment delimiters. * @type array[] $innerBlocks List of inner blocks. An array of arrays that * have the same structure as this one. * @type string $innerHTML HTML from inside block comment delimiters. * @type array $innerContent List of string fragments and null markers where * inner blocks were found. * } * @return string String of rendered HTML. */ function render_block( $parsed_block ) { global $post; $parent_block = null; /** * Allows render_block() to be short-circuited, by returning a non-null value. * * @since 5.1.0 * @since 5.9.0 The `$parent_block` parameter was added. * * @param string|null $pre_render The pre-rendered content. Default null. * @param array $parsed_block { * An associative array of the block being rendered. See WP_Block_Parser_Block. * * @type string $blockName Name of block. * @type array $attrs Attributes from block comment delimiters. * @type array[] $innerBlocks List of inner blocks. An array of arrays that * have the same structure as this one. * @type string $innerHTML HTML from inside block comment delimiters. * @type array $innerContent List of string fragments and null markers where * inner blocks were found. * } * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block. */ $pre_render = apply_filters( 'pre_render_block', null, $parsed_block, $parent_block ); if ( ! is_null( $pre_render ) ) { return $pre_render; } $source_block = $parsed_block; /** * Filters the block being rendered in render_block(), before it's processed. * * @since 5.1.0 * @since 5.9.0 The `$parent_block` parameter was added. * * @param array $parsed_block { * An associative array of the block being rendered. See WP_Block_Parser_Block. * * @type string $blockName Name of block. * @type array $attrs Attributes from block comment delimiters. * @type array[] $innerBlocks List of inner blocks. An array of arrays that * have the same structure as this one. * @type string $innerHTML HTML from inside block comment delimiters. * @type array $innerContent List of string fragments and null markers where * inner blocks were found. * } * @param array $source_block { * An un-modified copy of `$parsed_block`, as it appeared in the source content. * See WP_Block_Parser_Block. * * @type string $blockName Name of block. * @type array $attrs Attributes from block comment delimiters. * @type array[] $innerBlocks List of inner blocks. An array of arrays that * have the same structure as this one. * @type string $innerHTML HTML from inside block comment delimiters. * @type array $innerContent List of string fragments and null markers where * inner blocks were found. * } * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block. */ $parsed_block = apply_filters( 'render_block_data', $parsed_block, $source_block, $parent_block ); $context = array(); if ( $post instanceof WP_Post ) { $context['postId'] = $post->ID; /* * The `postType` context is largely unnecessary server-side, since the ID * is usually sufficient on its own. That being said, since a block's * manifest is expected to be shared between the server and the client, * it should be included to consistently fulfill the expectation. */ $context['postType'] = $post->post_type; } /** * Filters the default context provided to a rendered block. * * @since 5.5.0 * @since 5.9.0 The `$parent_block` parameter was added. * * @param array $context Default context. * @param array $parsed_block { * An associative array of the block being rendered. See WP_Block_Parser_Block. * * @type string $blockName Name of block. * @type array $attrs Attributes from block comment delimiters. * @type array[] $innerBlocks List of inner blocks. An array of arrays that * have the same structure as this one. * @type string $innerHTML HTML from inside block comment delimiters. * @type array $innerContent List of string fragments and null markers where * inner blocks were found. * } * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block. */ $context = apply_filters( 'render_block_context', $context, $parsed_block, $parent_block ); $block = new WP_Block( $parsed_block, $context ); return $block->render(); } /** * Parses blocks out of a content string. * * @since 5.0.0 * * @param string $content Post content. * @return array[] { * Array of block structures. * * @type array ...$0 { * An associative array of a single parsed block object. See WP_Block_Parser_Block. * * @type string $blockName Name of block. * @type array $attrs Attributes from block comment delimiters. * @type array[] $innerBlocks List of inner blocks. An array of arrays that * have the same structure as this one. * @type string $innerHTML HTML from inside block comment delimiters. * @type array $innerContent List of string fragments and null markers where * inner blocks were found. * } * } */ function parse_blocks( $content ) { /** * Filter to allow plugins to replace the server-side block parser. * * @since 5.0.0 * * @param string $parser_class Name of block parser class. */ $parser_class = apply_filters( 'block_parser_class', 'WP_Block_Parser' ); $parser = new $parser_class(); return $parser->parse( $content ); } /** * Parses dynamic blocks out of `post_content` and re-renders them. * * @since 5.0.0 * * @param string $content Post content. * @return string Updated post content. */ function do_blocks( $content ) { $blocks = parse_blocks( $content ); $top_level_block_count = count( $blocks ); $output = ''; /** * Parsed blocks consist of a list of top-level blocks. Those top-level * blocks may themselves contain nested inner blocks. However, every * top-level block is rendered independently, meaning there are no data * dependencies between them. * * Ideally, therefore, the parser would only need to parse one complete * top-level block at a time, render it, and move on. Unfortunately, this * is not possible with {@see \parse_blocks()} because it must parse the * entire given document at once. * * While the current implementation prevents this optimization, it’s still * possible to reduce the peak memory use when calls to `render_block()` * on those top-level blocks are memory-heavy (which many of them are). * By setting each parsed block to `NULL` after rendering it, any memory * allocated during the render will be freed and reused for the next block. * Before making this change, that memory was retained and would lead to * out-of-memory crashes for certain posts that now run with this change. */ for ( $i = 0; $i < $top_level_block_count; $i++ ) { $output .= render_block( $blocks[ $i ] ); $blocks[ $i ] = null; } // If there are blocks in this content, we shouldn't run wpautop() on it later. $priority = has_filter( 'the_content', 'wpautop' ); if ( false !== $priority && doing_filter( 'the_content' ) && has_blocks( $content ) ) { remove_filter( 'the_content', 'wpautop', $priority ); add_filter( 'the_content', '_restore_wpautop_hook', $priority + 1 ); } return $output; } /** * If do_blocks() needs to remove wpautop() from the `the_content` filter, this re-adds it afterwards, * for subsequent `the_content` usage. * * @since 5.0.0 * @access private * * @param string $content The post content running through this filter. * @return string The unmodified content. */ function _restore_wpautop_hook( $content ) { $current_priority = has_filter( 'the_content', '_restore_wpautop_hook' ); add_filter( 'the_content', 'wpautop', $current_priority - 1 ); remove_filter( 'the_content', '_restore_wpautop_hook', $current_priority ); return $content; } /** * Returns the current version of the block format that the content string is using. * * If the string doesn't contain blocks, it returns 0. * * @since 5.0.0 * * @param string $content Content to test. * @return int The block format version is 1 if the content contains one or more blocks, 0 otherwise. */ function block_version( $content ) { return has_blocks( $content ) ? 1 : 0; } /** * Registers a new block style. * * @since 5.3.0 * @since 6.6.0 Added support for registering styles for multiple block types. * * @link https://developer.wordpress.org/block-editor/reference-guides/block-api/block-styles/ * * @param string|string[] $block_name Block type name including namespace or array of namespaced block type names. * @param array $style_properties Array containing the properties of the style name, label, * style_handle (name of the stylesheet to be enqueued), * inline_style (string containing the CSS to be added), * style_data (theme.json-like array to generate CSS from). * See WP_Block_Styles_Registry::register(). * @return bool True if the block style was registered with success and false otherwise. */ function register_block_style( $block_name, $style_properties ) { return WP_Block_Styles_Registry::get_instance()->register( $block_name, $style_properties ); } /** * Unregisters a block style. * * @since 5.3.0 * * @param string $block_name Block type name including namespace. * @param string $block_style_name Block style name. * @return bool True if the block style was unregistered with success and false otherwise. */ function unregister_block_style( $block_name, $block_style_name ) { return WP_Block_Styles_Registry::get_instance()->unregister( $block_name, $block_style_name ); } /** * Checks whether the current block type supports the feature requested. * * @since 5.8.0 * @since 6.4.0 The `$feature` parameter now supports a string. * * @param WP_Block_Type $block_type Block type to check for support. * @param string|array $feature Feature slug, or path to a specific feature to check support for. * @param mixed $default_value Optional. Fallback value for feature support. Default false. * @return bool Whether the feature is supported. */ function block_has_support( $block_type, $feature, $default_value = false ) { $block_support = $default_value; if ( $block_type instanceof WP_Block_Type ) { if ( is_array( $feature ) && count( $feature ) === 1 ) { $feature = $feature[0]; } if ( is_array( $feature ) ) { $block_support = _wp_array_get( $block_type->supports, $feature, $default_value ); } elseif ( isset( $block_type->supports[ $feature ] ) ) { $block_support = $block_type->supports[ $feature ]; } } return true === $block_support || is_array( $block_support ); } /** * Converts typography keys declared under `supports.*` to `supports.typography.*`. * * Displays a `_doing_it_wrong()` notice when a block using the older format is detected. * * @since 5.8.0 * * @param array $metadata Metadata for registering a block type. * @return array Filtered metadata for registering a block type. */ function wp_migrate_old_typography_shape( $metadata ) { if ( ! isset( $metadata['supports'] ) ) { return $metadata; } $typography_keys = array( '__experimentalFontFamily', '__experimentalFontStyle', '__experimentalFontWeight', '__experimentalLetterSpacing', '__experimentalTextDecoration', '__experimentalTextTransform', 'fontSize', 'lineHeight', ); foreach ( $typography_keys as $typography_key ) { $support_for_key = isset( $metadata['supports'][ $typography_key ] ) ? $metadata['supports'][ $typography_key ] : null; if ( null !== $support_for_key ) { _doing_it_wrong( 'register_block_type_from_metadata()', sprintf( /* translators: 1: Block type, 2: Typography supports key, e.g: fontSize, lineHeight, etc. 3: block.json, 4: Old metadata key, 5: New metadata key. */ __( 'Block "%1$s" is declaring %2$s support in %3$s file under %4$s. %2$s support is now declared under %5$s.' ), $metadata['name'], "<code>$typography_key</code>", '<code>block.json</code>', "<code>supports.$typography_key</code>", "<code>supports.typography.$typography_key</code>" ), '5.8.0' ); _wp_array_set( $metadata['supports'], array( 'typography', $typography_key ), $support_for_key ); unset( $metadata['supports'][ $typography_key ] ); } } return $metadata; } /** * Helper function that constructs a WP_Query args array from * a `Query` block properties. * * It's used in Query Loop, Query Pagination Numbers and Query Pagination Next blocks. * * @since 5.8.0 * @since 6.1.0 Added `query_loop_block_query_vars` filter and `parents` support in query. * @since 6.7.0 Added support for the `format` property in query. * * @param WP_Block $block Block instance. * @param int $page Current query's page. * * @return array Returns the constructed WP_Query arguments. */ function build_query_vars_from_query_block( $block, $page ) { $query = array( 'post_type' => 'post', 'order' => 'DESC', 'orderby' => 'date', 'post__not_in' => array(), 'tax_query' => array(), ); if ( isset( $block->context['query'] ) ) { if ( ! empty( $block->context['query']['postType'] ) ) { $post_type_param = $block->context['query']['postType']; if ( is_post_type_viewable( $post_type_param ) ) { $query['post_type'] = $post_type_param; } } if ( isset( $block->context['query']['sticky'] ) && ! empty( $block->context['query']['sticky'] ) ) { $sticky = get_option( 'sticky_posts' ); if ( 'only' === $block->context['query']['sticky'] ) { /* * Passing an empty array to post__in will return have_posts() as true (and all posts will be returned). * Logic should be used before hand to determine if WP_Query should be used in the event that the array * being passed to post__in is empty. * * @see https://core.trac.wordpress.org/ticket/28099 */ $query['post__in'] = ! empty( $sticky ) ? $sticky : array( 0 ); $query['ignore_sticky_posts'] = 1; } elseif ( 'exclude' === $block->context['query']['sticky'] ) { $query['post__not_in'] = array_merge( $query['post__not_in'], $sticky ); } elseif ( 'ignore' === $block->context['query']['sticky'] ) { $query['ignore_sticky_posts'] = 1; } } if ( ! empty( $block->context['query']['exclude'] ) ) { $excluded_post_ids = array_map( 'intval', $block->context['query']['exclude'] ); $excluded_post_ids = array_filter( $excluded_post_ids ); $query['post__not_in'] = array_merge( $query['post__not_in'], $excluded_post_ids ); } if ( isset( $block->context['query']['perPage'] ) && is_numeric( $block->context['query']['perPage'] ) ) { $per_page = absint( $block->context['query']['perPage'] ); $offset = 0; if ( isset( $block->context['query']['offset'] ) && is_numeric( $block->context['query']['offset'] ) ) { $offset = absint( $block->context['query']['offset'] ); } $query['offset'] = ( $per_page * ( $page - 1 ) ) + $offset; $query['posts_per_page'] = $per_page; } // Migrate `categoryIds` and `tagIds` to `tax_query` for backwards compatibility. if ( ! empty( $block->context['query']['categoryIds'] ) || ! empty( $block->context['query']['tagIds'] ) ) { $tax_query_back_compat = array(); if ( ! empty( $block->context['query']['categoryIds'] ) ) { $tax_query_back_compat[] = array( 'taxonomy' => 'category', 'terms' => array_filter( array_map( 'intval', $block->context['query']['categoryIds'] ) ), 'include_children' => false, ); } if ( ! empty( $block->context['query']['tagIds'] ) ) { $tax_query_back_compat[] = array( 'taxonomy' => 'post_tag', 'terms' => array_filter( array_map( 'intval', $block->context['query']['tagIds'] ) ), 'include_children' => false, ); } $query['tax_query'] = array_merge( $query['tax_query'], $tax_query_back_compat ); } if ( ! empty( $block->context['query']['taxQuery'] ) ) { $tax_query = array(); foreach ( $block->context['query']['taxQuery'] as $taxonomy => $terms ) { if ( is_taxonomy_viewable( $taxonomy ) && ! empty( $terms ) ) { $tax_query[] = array( 'taxonomy' => $taxonomy, 'terms' => array_filter( array_map( 'intval', $terms ) ), 'include_children' => false, ); } } $query['tax_query'] = array_merge( $query['tax_query'], $tax_query ); } if ( ! empty( $block->context['query']['format'] ) && is_array( $block->context['query']['format'] ) ) { $formats = $block->context['query']['format']; /* * Validate that the format is either `standard` or a supported post format. * - First, add `standard` to the array of valid formats. * - Then, remove any invalid formats. */ $valid_formats = array_merge( array( 'standard' ), get_post_format_slugs() ); $formats = array_intersect( $formats, $valid_formats ); /* * The relation needs to be set to `OR` since the request can contain * two separate conditions. The user may be querying for items that have * either the `standard` format or a specific format. */ $formats_query = array( 'relation' => 'OR' ); /* * The default post format, `standard`, is not stored in the database. * If `standard` is part of the request, the query needs to exclude all post items that * have a format assigned. */ if ( in_array( 'standard', $formats, true ) ) { $formats_query[] = array( 'taxonomy' => 'post_format', 'field' => 'slug', 'operator' => 'NOT EXISTS', ); // Remove the `standard` format, since it cannot be queried. unset( $formats[ array_search( 'standard', $formats, true ) ] ); } // Add any remaining formats to the formats query. if ( ! empty( $formats ) ) { // Add the `post-format-` prefix. $terms = array_map( static function ( $format ) { return "post-format-$format"; }, $formats ); $formats_query[] = array( 'taxonomy' => 'post_format', 'field' => 'slug', 'terms' => $terms, 'operator' => 'IN', ); } /* * Add `$formats_query` to `$query`, as long as it contains more than one key: * If `$formats_query` only contains the initial `relation` key, there are no valid formats to query, * and the query should not be modified. */ if ( count( $formats_query ) > 1 ) { // Enable filtering by both post formats and other taxonomies by combining them with `AND`. if ( empty( $query['tax_query'] ) ) { $query['tax_query'] = $formats_query; } else { $query['tax_query'] = array( 'relation' => 'AND', $query['tax_query'], $formats_query, ); } } } if ( isset( $block->context['query']['order'] ) && in_array( strtoupper( $block->context['query']['order'] ), array( 'ASC', 'DESC' ), true ) ) { $query['order'] = strtoupper( $block->context['query']['order'] ); } if ( isset( $block->context['query']['orderBy'] ) ) { $query['orderby'] = $block->context['query']['orderBy']; } if ( isset( $block->context['query']['author'] ) ) { if ( is_array( $block->context['query']['author'] ) ) { $query['author__in'] = array_filter( array_map( 'intval', $block->context['query']['author'] ) ); } elseif ( is_string( $block->context['query']['author'] ) ) { $query['author__in'] = array_filter( array_map( 'intval', explode( ',', $block->context['query']['author'] ) ) ); } elseif ( is_int( $block->context['query']['author'] ) && $block->context['query']['author'] > 0 ) { $query['author'] = $block->context['query']['author']; } } if ( ! empty( $block->context['query']['search'] ) ) { $query['s'] = $block->context['query']['search']; } if ( ! empty( $block->context['query']['parents'] ) && is_post_type_hierarchical( $query['post_type'] ) ) { $query['post_parent__in'] = array_unique( array_map( 'intval', $block->context['query']['parents'] ) ); } } /** * Filters the arguments which will be passed to `WP_Query` for the Query Loop Block. * * Anything to this filter should be compatible with the `WP_Query` API to form * the query context which will be passed down to the Query Loop Block's children. * This can help, for example, to include additional settings or meta queries not * directly supported by the core Query Loop Block, and extend its capabilities. * * Please note that this will only influence the query that will be rendered on the * front-end. The editor preview is not affected by this filter. Also, worth noting * that the editor preview uses the REST API, so, ideally, one should aim to provide * attributes which are also compatible with the REST API, in order to be able to * implement identical queries on both sides. * * @since 6.1.0 * * @param array $query Array containing parameters for `WP_Query` as parsed by the block context. * @param WP_Block $block Block instance. * @param int $page Current query's page. */ return apply_filters( 'query_loop_block_query_vars', $query, $block, $page ); } /** * Helper function that returns the proper pagination arrow HTML for * `QueryPaginationNext` and `QueryPaginationPrevious` blocks based * on the provided `paginationArrow` from `QueryPagination` context. * * It's used in QueryPaginationNext and QueryPaginationPrevious blocks. * * @since 5.9.0 * * @param WP_Block $block Block instance. * @param bool $is_next Flag for handling `next/previous` blocks. * @return string|null The pagination arrow HTML or null if there is none. */ function get_query_pagination_arrow( $block, $is_next ) { $arrow_map = array( 'none' => '', 'arrow' => array( 'next' => '→', 'previous' => '←', ), 'chevron' => array( 'next' => '»', 'previous' => '«', ), ); if ( ! empty( $block->context['paginationArrow'] ) && array_key_exists( $block->context['paginationArrow'], $arrow_map ) && ! empty( $arrow_map[ $block->context['paginationArrow'] ] ) ) { $pagination_type = $is_next ? 'next' : 'previous'; $arrow_attribute = $block->context['paginationArrow']; $arrow = $arrow_map[ $block->context['paginationArrow'] ][ $pagination_type ]; $arrow_classes = "wp-block-query-pagination-$pagination_type-arrow is-arrow-$arrow_attribute"; return "<span class='$arrow_classes' aria-hidden='true'>$arrow</span>"; } return null; } /** * Helper function that constructs a comment query vars array from the passed * block properties. * * It's used with the Comment Query Loop inner blocks. * * @since 6.0.0 * * @param WP_Block $block Block instance. * @return array Returns the comment query parameters to use with the * WP_Comment_Query constructor. */ function build_comment_query_vars_from_block( $block ) { $comment_args = array( 'orderby' => 'comment_date_gmt', 'order' => 'ASC', 'status' => 'approve', 'no_found_rows' => false, ); if ( is_user_logged_in() ) { $comment_args['include_unapproved'] = array( get_current_user_id() ); } else { $unapproved_email = wp_get_unapproved_comment_author_email(); if ( $unapproved_email ) { $comment_args['include_unapproved'] = array( $unapproved_email ); } } if ( ! empty( $block->context['postId'] ) ) { $comment_args['post_id'] = (int) $block->context['postId']; } if ( get_option( 'thread_comments' ) ) { $comment_args['hierarchical'] = 'threaded'; } else { $comment_args['hierarchical'] = false; } if ( get_option( 'page_comments' ) === '1' || get_option( 'page_comments' ) === true ) { $per_page = get_option( 'comments_per_page' ); $default_page = get_option( 'default_comments_page' ); if ( $per_page > 0 ) { $comment_args['number'] = $per_page; $page = (int) get_query_var( 'cpage' ); if ( $page ) { $comment_args['paged'] = $page; } elseif ( 'oldest' === $default_page ) { $comment_args['paged'] = 1; } elseif ( 'newest' === $default_page ) { $max_num_pages = (int) ( new WP_Comment_Query( $comment_args ) )->max_num_pages; if ( 0 !== $max_num_pages ) { $comment_args['paged'] = $max_num_pages; } } } } return $comment_args; } /** * Helper function that returns the proper pagination arrow HTML for * `CommentsPaginationNext` and `CommentsPaginationPrevious` blocks based on the * provided `paginationArrow` from `CommentsPagination` context. * * It's used in CommentsPaginationNext and CommentsPaginationPrevious blocks. * * @since 6.0.0 * * @param WP_Block $block Block instance. * @param string $pagination_type Optional. Type of the arrow we will be rendering. * Accepts 'next' or 'previous'. Default 'next'. * @return string|null The pagination arrow HTML or null if there is none. */ function get_comments_pagination_arrow( $block, $pagination_type = 'next' ) { $arrow_map = array( 'none' => '', 'arrow' => array( 'next' => '→', 'previous' => '←', ), 'chevron' => array( 'next' => '»', 'previous' => '«', ), ); if ( ! empty( $block->context['comments/paginationArrow'] ) && ! empty( $arrow_map[ $block->context['comments/paginationArrow'] ][ $pagination_type ] ) ) { $arrow_attribute = $block->context['comments/paginationArrow']; $arrow = $arrow_map[ $block->context['comments/paginationArrow'] ][ $pagination_type ]; $arrow_classes = "wp-block-comments-pagination-$pagination_type-arrow is-arrow-$arrow_attribute"; return "<span class='$arrow_classes' aria-hidden='true'>$arrow</span>"; } return null; } /** * Strips all HTML from the content of footnotes, and sanitizes the ID. * * This function expects slashed data on the footnotes content. * * @access private * @since 6.3.2 * * @param string $footnotes JSON-encoded string of an array containing the content and ID of each footnote. * @return string Filtered content without any HTML on the footnote content and with the sanitized ID. */ function _wp_filter_post_meta_footnotes( $footnotes ) { $footnotes_decoded = json_decode( $footnotes, true ); if ( ! is_array( $footnotes_decoded ) ) { return ''; } $footnotes_sanitized = array(); foreach ( $footnotes_decoded as $footnote ) { if ( ! empty( $footnote['content'] ) && ! empty( $footnote['id'] ) ) { $footnotes_sanitized[] = array( 'id' => sanitize_key( $footnote['id'] ), 'content' => wp_unslash( wp_filter_post_kses( wp_slash( $footnote['content'] ) ) ), ); } } return wp_json_encode( $footnotes_sanitized ); } /** * Adds the filters for footnotes meta field. * * @access private * @since 6.3.2 */ function _wp_footnotes_kses_init_filters() { add_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' ); } /** * Removes the filters for footnotes meta field. * * @access private * @since 6.3.2 */ function _wp_footnotes_remove_filters() { remove_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' ); } /** * Registers the filter of footnotes meta field if the user does not have `unfiltered_html` capability. * * @access private * @since 6.3.2 */ function _wp_footnotes_kses_init() { _wp_footnotes_remove_filters(); if ( ! current_user_can( 'unfiltered_html' ) ) { _wp_footnotes_kses_init_filters(); } } /** * Initializes the filters for footnotes meta field when imported data should be filtered. * * This filter is the last one being executed on {@see 'force_filtered_html_on_import'}. * If the input of the filter is true, it means we are in an import situation and should * enable kses, independently of the user capabilities. So in that case we call * _wp_footnotes_kses_init_filters(). * * @access private * @since 6.3.2 * * @param string $arg Input argument of the filter. * @return string Input argument of the filter. */ function _wp_footnotes_force_filtered_html_on_import_filter( $arg ) { // If `force_filtered_html_on_import` is true, we need to init the global styles kses filters. if ( $arg ) { _wp_footnotes_kses_init_filters(); } return $arg; }
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