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<?php |
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/** |
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* Block support to enable per-section styling of block types via |
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* block style variations. |
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* |
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* @package gutenberg |
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*/ |
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|
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/** |
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* Generate block style variation instance name. |
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* |
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* @since 6.6.0 |
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* |
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* @deprecated 6.7.0 |
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* |
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* @param array $block Block object. |
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* @param string $variation Slug for the block style variation. |
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* |
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* @return string The unique variation name. |
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*/ |
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function gutenberg_create_block_style_variation_instance_name( $block, $variation ) { |
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_deprecated_function( __FUNCTION__, '6.7.0' ); |
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return $variation . '--' . md5( serialize( $block ) ); |
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} |
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|
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/** |
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* Determines the block style variation names within a CSS class string. |
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* |
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* @since 6.6.0 |
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* |
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* @param string $class_string CSS class string to look for a variation in. |
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* |
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* @return array|null The block style variation name if found. |
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*/ |
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function gutenberg_get_block_style_variation_name_from_class( $class_string ) { |
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if ( ! is_string( $class_string ) ) { |
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return null; |
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} |
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|
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preg_match_all( '/\bis-style-(?!default)(\S+)\b/', $class_string, $matches ); |
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return $matches[1] ?? null; |
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} |
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|
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/** |
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* Recursively resolves any `ref` values within a block style variation's data. |
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* |
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* @since 6.6.0 |
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* |
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* @param array $variation_data Reference to the variation data being processed. |
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* @param array $theme_json Theme.json data to retrieve referenced values from. |
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*/ |
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function gutenberg_resolve_block_style_variation_ref_values( &$variation_data, $theme_json ) { |
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foreach ( $variation_data as $key => &$value ) { |
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// Only need to potentially process arrays. |
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if ( is_array( $value ) ) { |
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// If ref value is set, attempt to find its matching value and update it. |
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if ( array_key_exists( 'ref', $value ) ) { |
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// Clean up any invalid ref value. |
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if ( empty( $value['ref'] ) || ! is_string( $value['ref'] ) ) { |
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unset( $variation_data[ $key ] ); |
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} |
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|
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$value_path = explode( '.', $value['ref'] ?? '' ); |
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$ref_value = _wp_array_get( $theme_json, $value_path ); |
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|
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// Only update the current value if the referenced path matched a value. |
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if ( null === $ref_value ) { |
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unset( $variation_data[ $key ] ); |
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} else { |
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$value = $ref_value; |
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} |
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} else { |
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// Recursively look for ref instances. |
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gutenberg_resolve_block_style_variation_ref_values( $value, $theme_json ); |
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} |
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} |
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} |
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} |
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|
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/** |
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* Render the block style variation's styles. |
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* |
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* In the case of nested blocks with variations applied, we want the parent |
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* variation's styles to be rendered before their descendants. This solves the |
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* issue of a block type being styled in both the parent and descendant: we want |
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* the descendant style to take priority, and this is done by loading it after, |
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* in the DOM order. This is why the variation stylesheet generation is in a |
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* different filter. |
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* |
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* @since 6.6.0 |
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* |
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* @param array $parsed_block The parsed block. |
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* |
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* @return array The parsed block with block style variation classname added. |
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*/ |
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function gutenberg_render_block_style_variation_support_styles( $parsed_block ) { |
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$classes = $parsed_block['attrs']['className'] ?? null; |
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$variations = gutenberg_get_block_style_variation_name_from_class( $classes ); |
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|
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if ( ! $variations ) { |
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return $parsed_block; |
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} |
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|
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$tree = WP_Theme_JSON_Resolver_Gutenberg::get_merged_data(); |
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$theme_json = $tree->get_raw_data(); |
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|
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// Only the first block style variation with data is supported. |
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$variation_data = array(); |
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foreach ( $variations as $variation ) { |
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$variation_data = $theme_json['styles']['blocks'][ $parsed_block['blockName'] ]['variations'][ $variation ] ?? array(); |
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|
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if ( ! empty( $variation_data ) ) { |
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break; |
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} |
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} |
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|
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if ( empty( $variation_data ) ) { |
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return $parsed_block; |
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} |
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|
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// Recursively resolve any ref values with the appropriate value within the |
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// theme_json data. |
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gutenberg_resolve_block_style_variation_ref_values( $variation_data, $theme_json ); |
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|
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$variation_instance = wp_unique_id( $variation . '--' ); |
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$class_name = "is-style-$variation_instance"; |
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$updated_class_name = $parsed_block['attrs']['className'] . " $class_name"; |
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|
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/* |
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* Even though block style variations are effectively theme.json partials, |
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* they can't be processed completely as though they are. |
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* |
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* Block styles support custom selectors to direct specific types of styles |
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* to inner elements. For example, borders on Image block's get applied to |
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* the inner `img` element rather than the wrapping `figure`. |
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* |
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* The following relocates the "root" block style variation styles to |
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* under an appropriate blocks property to leverage the preexisting style |
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* generation for simple block style variations. This way they get the |
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* custom selectors they need. |
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* |
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* The inner elements and block styles for the variation itself are |
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* still included at the top level but scoped by the variation's selector |
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* when the stylesheet is generated. |
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*/ |
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$elements_data = $variation_data['elements'] ?? array(); |
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$blocks_data = $variation_data['blocks'] ?? array(); |
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unset( $variation_data['elements'] ); |
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unset( $variation_data['blocks'] ); |
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|
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_wp_array_set( |
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$blocks_data, |
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array( $parsed_block['blockName'], 'variations', $variation_instance ), |
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$variation_data |
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); |
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|
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$config = array( |
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'version' => WP_Theme_JSON_Gutenberg::LATEST_SCHEMA, |
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'settings' => array( |
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'spacing' => array( |
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'blockGap' => true, |
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), |
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), |
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'styles' => array( |
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'elements' => $elements_data, |
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'blocks' => $blocks_data, |
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), |
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); |
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|
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// Turn off filter that excludes block nodes. They are needed here for the variation's inner block types. |
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if ( ! is_admin() ) { |
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remove_filter( 'wp_theme_json_get_style_nodes', 'wp_filter_out_block_nodes' ); |
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} |
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|
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// Temporarily prevent variation instance from being sanitized while processing theme.json. |
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$styles_registry = WP_Block_Styles_Registry::get_instance(); |
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$styles_registry->register( $parsed_block['blockName'], array( 'name' => $variation_instance ) ); |
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|
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$variation_theme_json = new WP_Theme_JSON_Gutenberg( $config, 'blocks' ); |
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$variation_styles = $variation_theme_json->get_stylesheet( |
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array( 'styles' ), |
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array( 'custom' ), |
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array( |
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'include_block_style_variations' => true, |
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'skip_root_layout_styles' => true, |
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'scope' => ".$class_name", |
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) |
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); |
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|
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// Clean up temporary block style now instance styles have been processed. |
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$styles_registry->unregister( $parsed_block['blockName'], $variation_instance ); |
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|
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// Restore filter that excludes block nodes. |
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if ( ! is_admin() ) { |
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add_filter( 'wp_theme_json_get_style_nodes', 'wp_filter_out_block_nodes' ); |
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} |
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|
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if ( empty( $variation_styles ) ) { |
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return $parsed_block; |
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} |
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|
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wp_register_style( 'block-style-variation-styles', false, array( 'wp-block-library', 'global-styles' ) ); |
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wp_add_inline_style( 'block-style-variation-styles', $variation_styles ); |
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|
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/* |
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* Add variation instance class name to block's className string so it can |
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* be enforced in the block markup via render_block filter. |
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*/ |
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_wp_array_set( $parsed_block, array( 'attrs', 'className' ), $updated_class_name ); |
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|
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return $parsed_block; |
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} |
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|
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/** |
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* Ensure the variation block support class name generated and added to |
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* block attributes in the `render_block_data` filter gets applied to the |
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* block's markup. |
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* |
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* @since 6.6.0 |
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* |
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* @see gutenberg_render_block_style_variation_support_styles |
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* |
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* @param string $block_content Rendered block content. |
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* @param array $block Block object. |
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* |
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* @return string Filtered block content. |
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*/ |
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function gutenberg_render_block_style_variation_class_name( $block_content, $block ) { |
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if ( ! $block_content || empty( $block['attrs']['className'] ) ) { |
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return $block_content; |
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} |
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|
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$block_class_name = $block['attrs']['className']; |
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if ( ! is_string( $block_class_name ) ) { |
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return $block_content; |
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} |
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|
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/* |
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* Matches a class prefixed by `is-style`, followed by the |
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* variation slug, then `--`, and finally an instance number. |
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*/ |
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preg_match( '/\bis-style-(\S+?--\d+)\b/', $block_class_name, $matches ); |
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|
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if ( empty( $matches ) ) { |
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return $block_content; |
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} |
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|
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$tags = new WP_HTML_Tag_Processor( $block_content ); |
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|
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if ( $tags->next_tag() ) { |
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/* |
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* Ensure the variation instance class name set in the |
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* `render_block_data` filter is applied in markup. |
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* See `gutenberg_render_block_style_variation_support_styles`. |
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*/ |
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$tags->add_class( $matches[0] ); |
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} |
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|
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return $tags->get_updated_html(); |
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} |
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|
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/** |
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* Enqueues styles for block style variations. |
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* |
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* @since 6.6.0 |
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*/ |
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function gutenberg_enqueue_block_style_variation_styles() { |
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wp_enqueue_style( 'block-style-variation-styles' ); |
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} |
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|
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// Register the block support. |
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WP_Block_Supports::get_instance()->register( 'block-style-variation', array() ); |
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|
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// Remove core filters and action. |
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if ( function_exists( 'wp_render_block_style_variation_support_styles' ) ) { |
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remove_filter( 'render_block_data', 'wp_render_block_style_variation_support_styles' ); |
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} |
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if ( function_exists( 'wp_render_block_style_variation_class_name' ) ) { |
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remove_filter( 'render_block', 'wp_render_block_style_variation_class_name' ); |
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} |
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if ( function_exists( 'wp_enqueue_block_style_variation_styles' ) ) { |
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remove_action( 'wp_enqueue_scripts', 'wp_enqueue_block_style_variation_styles' ); |
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} |
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|
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// Add Gutenberg filters and action. |
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add_filter( 'render_block_data', 'gutenberg_render_block_style_variation_support_styles' ); |
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add_filter( 'render_block', 'gutenberg_render_block_style_variation_class_name', 10, 2 ); |
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add_action( 'wp_enqueue_scripts', 'gutenberg_enqueue_block_style_variation_styles', 1 ); |
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|
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/** |
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* Registers block style variations read in from theme.json partials. |
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* |
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* @access private |
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* |
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* @param array $variations Shared block style variations. |
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*/ |
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function gutenberg_register_block_style_variations_from_theme_json_partials( $variations ) { |
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if ( empty( $variations ) ) { |
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return; |
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} |
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|
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$registry = WP_Block_Styles_Registry::get_instance(); |
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|
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foreach ( $variations as $variation ) { |
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if ( empty( $variation['blockTypes'] ) || empty( $variation['styles'] ) ) { |
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continue; |
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} |
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|
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$variation_name = $variation['slug'] ?? _wp_to_kebab_case( $variation['title'] ); |
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$variation_label = $variation['title'] ?? $variation_name; |
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|
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foreach ( $variation['blockTypes'] as $block_type ) { |
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$registered_styles = $registry->get_registered_styles_for_block( $block_type ); |
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|
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// Register block style variation if it hasn't already been registered. |
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if ( ! array_key_exists( $variation_name, $registered_styles ) ) { |
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register_block_style( |
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$block_type, |
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array( |
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'name' => $variation_name, |
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'label' => $variation_label, |
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) |
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); |
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} |
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} |
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} |
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} |
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|
