ides. * @since 6.7.0 Return any updated bindings metadata in the computed attributes. * * @return array The computed block attributes for the provided block bindings. */ private function process_block_bindings() { $block_type = $this->name; $parsed_block = $this->parsed_block; $computed_attributes = array(); $supported_block_attributes = get_block_bindings_supported_attributes( $block_type ); // If the block doesn't have the bindings property, isn't one of the supported // block types, or the bindings property is not an array, return the block content. if ( empty( $supported_block_attributes ) || empty( $parsed_block['attrs']['metadata']['bindings'] ) || ! is_array( $parsed_block['attrs']['metadata']['bindings'] ) ) { return $computed_attributes; } $bindings = $parsed_block['attrs']['metadata']['bindings']; /* * If the default binding is set for pattern overrides, replace it * with a pattern override binding for all supported attributes. */ if ( isset( $bindings['__default']['source'] ) && 'core/pattern-overrides' === $bindings['__default']['source'] ) { $updated_bindings = array(); /* * Build a binding array of all supported attributes. * Note that this also omits the `__default` attribute from the * resulting array. */ foreach ( $supported_block_attributes as $attribute_name ) { // Retain any non-pattern override bindings that might be present. $updated_bindings[ $attribute_name ] = $bindings[ $attribute_name ] ?? array( 'source' => 'core/pattern-overrides' ); } $bindings = $updated_bindings; /* * Update the bindings metadata of the computed attributes. * This ensures the block receives the expanded __default binding metadata when it renders. */ $computed_attributes['metadata'] = array_merge( $parsed_block['attrs']['metadata'], array( 'bindings' => $bindings ) ); } foreach ( $bindings as $attribute_name => $block_binding ) { // If the attribute is not in the supported list, process next attribute. if ( ! in_array( $attribute_name, $supported_block_attributes, true ) ) { continue; } // If no source is provided, or that source is not registered, process next attribute. if ( ! isset( $block_binding['source'] ) || ! is_string( $block_binding['source'] ) ) { continue; } $block_binding_source = get_block_bindings_source( $block_binding['source'] ); if ( null === $block_binding_source ) { continue; } // Adds the necessary context defined by the source. if ( ! empty( $block_binding_source->uses_context ) ) { foreach ( $block_binding_source->uses_context as $context_name ) { if ( array_key_exists( $context_name, $this->available_context ) ) { $this->context[ $context_name ] = $this->available_context[ $context_name ]; } } } $source_args = ! empty( $block_binding['args'] ) && is_array( $block_binding['args'] ) ? $block_binding['args'] : array(); $source_value = $block_binding_source->get_value( $source_args, $this, $attribute_name ); // If the value is not null, process the HTML based on the block and the attribute. if ( ! is_null( $source_value ) ) { $computed_attributes[ $attribute_name ] = $source_value; } } return $computed_attributes; } /** * Depending on the block attribute name, replace its value in the HTML based on the value provided. * * @since 6.5.0 * * @param string $block_content Block content. * @param string $attribute_name The attribute name to replace. * @param mixed $source_value The value used to replace in the HTML. * @return string The modified block content. */ private function replace_html( string $block_content, string $attribute_name, $source_value ) { $block_type = $this->block_type; if ( ! isset( $block_type->attributes[ $attribute_name ]['source'] ) ) { return $block_content; } // Depending on the attribute source, the processing will be different. switch ( $block_type->attributes[ $attribute_name ]['source'] ) { case 'html': case 'rich-text': $block_reader = self::get_block_bindings_processor( $block_content ); // TODO: Support for CSS selectors whenever they are ready in the HTML API. // In the meantime, support comma-separated selectors by exploding them into an array. $selectors = explode( ',', $block_type->attributes[ $attribute_name ]['selector'] ); // Add a bookmark to the first tag to be able to iterate over the selectors. $block_reader->next_tag(); $block_reader->set_bookmark( 'iterate-selectors' ); foreach ( $selectors as $selector ) { // If the parent tag, or any of its children, matches the selector, replace the HTML. if ( strcasecmp( $block_reader->get_tag(), $selector ) === 0 || $block_reader->next_tag( array( 'tag_name' => $selector, ) ) ) { // TODO: Use `WP_HTML_Processor::set_inner_html` method once it's available. $block_reader->release_bookmark( 'iterate-selectors' ); $block_reader->replace_rich_text( wp_kses_post( $source_value ) ); return $block_reader->get_updated_html(); } else { $block_reader->seek( 'iterate-selectors' ); } } $block_reader->release_bookmark( 'iterate-selectors' ); return $block_content; case 'attribute': $amended_content = new WP_HTML_Tag_Processor( $block_content ); if ( ! $amended_content->next_tag( array( // TODO: build the query from CSS selector. 'tag_name' => $block_type->attributes[ $attribute_name ]['selector'], ) ) ) { return $block_content; } $amended_content->set_attribute( $block_type->attributes[ $attribute_name ]['attribute'], $source_value ); return $amended_content->get_updated_html(); default: return $block_content; } } private static function get_block_bindings_processor( string $block_content ) { $internal_processor_class = new class('', WP_HTML_Processor::CONSTRUCTOR_UNLOCK_CODE) extends WP_HTML_Processor { /** * Replace the rich text content between a tag opener and matching closer. * * When stopped on a tag opener, replace the content enclosed by it and its * matching closer with the provided rich text. * * @param string $rich_text The rich text to replace the original content with. * @return bool True on success. */ public function replace_rich_text( $rich_text ) { if ( $this->is_tag_closer() || ! $this->expects_closer() ) { return false; } $depth = $this->get_current_depth(); $tag_name = $this->get_tag(); $this->set_bookmark( '_wp_block_bindings' ); // The bookmark names are prefixed with `_` so the key below has an extra `_`. $tag_opener = $this->bookmarks['__wp_block_bindings']; $start = $tag_opener->start + $tag_opener->length; // Find matching tag closer. while ( $this->next_token() && $this->get_current_depth() >= $depth ) { } if ( ! $this->is_tag_closer() || $tag_name !== $this->get_tag() ) { return false; } $this->set_bookmark( '_wp_block_bindings' ); $tag_closer = $this->bookmarks['__wp_block_bindings']; $end = $tag_closer->start; $this->lexical_updates[] = new WP_HTML_Text_Replacement( $start, $end - $start, $rich_text ); return true; } }; return $internal_processor_class::create_fragment( $block_content ); } /** * Generates the render output for the block. * * @since 5.5.0 * @since 6.5.0 Added block bindings processing. * * @global WP_Post $post Global post object. * * @param array $options { * Optional options object. * * @type bool $dynamic Defaults to 'true'. Optionally set to false to avoid using the block's render_callback. * } * @return string Rendered block output. */ public function render( $options = array() ) { global $post; $before_wp_enqueue_scripts_count = did_action( 'wp_enqueue_scripts' ); // Capture the current assets queues. $before_styles_queue = wp_styles()->queue; $before_scripts_queue = wp_scripts()->queue; $before_script_modules_queue = wp_script_modules()->get_queue(); /* * There can be only one root interactive block at a time because the rendered HTML of that block contains * the rendered HTML of all its inner blocks, including any interactive block. */ static $root_interactive_block = null; /** * Filters whether Interactivity API should process directives. * * @since 6.6.0 * * @param bool $enabled Whether the directives processing is enabled. */ $interactivity_process_directives_enabled = apply_filters( 'interactivity_process_directives', true ); if ( $interactivity_process_directives_enabled && null === $root_interactive_block && ( ( isset( $this->block_type->supports['interactivity'] ) && true === $this->block_type->supports['interactivity'] ) || ! empty( $this->block_type->supports['interactivity']['interactive'] ) ) ) { $root_interactive_block = $this; } $options = wp_parse_args( $options, array( 'dynamic' => true, ) ); // Process the block bindings and get attributes updated with the values from the sources. $computed_attributes = $this->process_block_bindings(); if ( ! empty( $computed_attributes ) ) { // Merge the computed attributes with the original attributes. $this->attributes = array_merge( $this->attributes, $computed_attributes ); } $is_dynamic = $options['dynamic'] && $this->name && null !== $this->block_type && $this->block_type->is_dynamic(); $block_content = ''; if ( ! $options['dynamic'] || empty( $this->block_type->skip_inner_blocks ) ) { $index = 0; foreach ( $this->inner_content as $chunk ) { if ( is_string( $chunk ) ) { $block_content .= $chunk; } else { $inner_block = $this->inner_blocks[ $index ]; $parent_block = $this; /** This filter is documented in wp-includes/blocks.php */ $pre_render = apply_filters( 'pre_render_block', null, $inner_block->parsed_block, $parent_block ); if ( ! is_null( $pre_render ) ) { $block_content .= $pre_render; } else { $source_block = $inner_block->parsed_block; $inner_block_context = $inner_block->context; /** This filter is documented in wp-includes/blocks.php */ $inner_block->parsed_block = apply_filters( 'render_block_data', $inner_block->parsed_block, $source_block, $parent_block ); /** This filter is documented in wp-includes/blocks.php */ $inner_block->context = apply_filters( 'render_block_context', $inner_block->context, $inner_block->parsed_block, $parent_block ); /* * The `refresh_context_dependents()` method already calls `refresh_parsed_block_dependents()`. * Therefore the second condition is irrelevant if the first one is satisfied. */ if ( $inner_block->context !== $inner_block_context ) { $inner_block->refresh_context_dependents(); } elseif ( $inner_block->parsed_block !== $source_block ) { $inner_block->refresh_parsed_block_dependents(); } $block_content .= $inner_block->render(); } ++$index; } } } if ( ! empty( $computed_attributes ) && ! empty( $block_content ) ) { foreach ( $computed_attributes as $attribute_name => $source_value ) { $block_content = $this->replace_html( $block_content, $attribute_name, $source_value ); } } if ( $is_dynamic ) { $global_post = $post; $parent = WP_Block_Supports::$block_to_render; WP_Block_Supports::$block_to_render = $this->parsed_block; $block_content = (string) call_user_func( $this->block_type->render_callback, $this->attributes, $block_content, $this ); WP_Block_Supports::$block_to_render = $parent; $post = $global_post; } if ( ( ! empty( $this->block_type->script_handles ) ) ) { foreach ( $this->block_type->script_handles as $script_handle ) { wp_enqueue_script( $script_handle ); } } if ( ! empty( $this->block_type->view_script_handles ) ) { foreach ( $this->block_type->view_script_handles as $view_script_handle ) { wp_enqueue_script( $view_script_handle ); } } if ( ! empty( $this->block_type->view_script_module_ids ) ) { foreach ( $this->block_type->view_script_module_ids as $view_script_module_id ) { wp_enqueue_script_module( $view_script_module_id ); } } /* * For Core blocks, these styles are only enqueued if `wp_should_load_separate_core_block_assets()` returns * true. Otherwise these `wp_enqueue_style()` calls will not have any effect, as the Core blocks are relying on * the combined 'wp-block-library' stylesheet instead, which is unconditionally enqueued. */ if ( ( ! empty( $this->block_type->style_handles ) ) ) { foreach ( $this->block_type->style_handles as $style_handle ) { wp_enqueue_style( $style_handle ); } } if ( ( ! empty( $this->block_type->view_style_handles ) ) ) { foreach ( $this->block_type->view_style_handles as $view_style_handle ) { wp_enqueue_style( $view_style_handle ); } } /** * Filters the content of a single block. * * @since 5.0.0 * @since 5.9.0 The `$instance` parameter was added. * * @param string $block_content The block content. * @param array $block The full block, including name and attributes. * @param WP_Block $instance The block instance. */ $block_content = apply_filters( 'render_block', $block_content, $this->parsed_block, $this ); /** * Filters the content of a single block. * * The dynamic portion of the hook name, `$name`, refers to * the block name, e.g. "core/paragraph". * * @since 5.7.0 * @since 5.9.0 The `$instance` parameter was added. * * @param string $block_content The block content. * @param array $block The full block, including name and attributes. * @param WP_Block $instance The block instance. */ $block_content = apply_filters( "render_block_{$this->name}", $block_content, $this->parsed_block, $this ); if ( $root_interactive_block === $this ) { // The root interactive block has finished rendering. Time to process directives. $block_content = wp_interactivity_process_directives( $block_content ); $root_interactive_block = null; } // Capture the new assets enqueued during rendering, and restore the queues the state prior to rendering. $after_styles_queue = wp_styles()->queue; $after_scripts_queue = wp_scripts()->queue; $after_script_modules_queue = wp_script_modules()->get_queue(); /* * As a very special case, a dynamic block may in fact include a call to wp_head() (and thus wp_enqueue_scripts()), * in which all of its enqueued assets are targeting wp_footer. In this case, nothing would be printed, but this * shouldn't indicate that the just-enqueued assets should be dequeued due to it being an empty block. */ $just_did_wp_enqueue_scripts = ( did_action( 'wp_enqueue_scripts' ) !== $before_wp_enqueue_scripts_count ); $has_new_styles = ( $before_styles_queue !== $after_styles_queue ); $has_new_scripts = ( $before_scripts_queue !== $after_scripts_queue ); $has_new_script_modules = ( $before_script_modules_queue !== $after_script_modules_queue ); // Dequeue the newly enqueued assets with the existing assets if the rendered block was empty & wp_enqueue_scripts did not fire. if ( ! $just_did_wp_enqueue_scripts && ( $has_new_styles || $has_new_scripts || $has_new_script_modules ) && ( trim( $block_content ) === '' && /** * Filters whether to enqueue assets for a block which has no rendered content. * * @since 6.9.0 * * @param bool $enqueue Whether to enqueue assets. * @param string $block_name Block name. */ ! (bool) apply_filters( 'enqueue_empty_block_content_assets', false, $this->name ) ) ) { foreach ( array_diff( $after_styles_queue, $before_styles_queue ) as $handle ) { wp_dequeue_style( $handle ); } foreach ( array_diff( $after_scripts_queue, $before_scripts_queue ) as $handle ) { wp_dequeue_script( $handle ); } foreach ( array_diff( $after_script_modules_queue, $before_script_modules_queue ) as $handle ) { wp_dequeue_script_module( $handle ); } } return $block_content; } }
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