Add bindings attribute

lib/load.php

@@ -125,7 +125,6 @@ function gutenberg_is_experiment_enabled( $name ) {
 require __DIR__ . '/compat/wordpress-6.5/script-loader.php';
 
 // WordPress 6.6 compat.
-require __DIR__ . '/compat/wordpress-6.6/blocks.php';
 require __DIR__ . '/compat/wordpress-6.6/block-bindings/pattern-overrides.php';
 
 // Experimental features.

packages/block-library/src/block/index.php

@@ -78,20 +78,50 @@ function render_block_core_block( $attributes ) {
 	 * filter so that it is available when a pattern's inner blocks are
 	 * rendering via do_blocks given it only receives the inner content.
 	 */
-	$has_pattern_overrides = isset( $attributes['content'] );
+	$has_pattern_overrides = isset( $attributes['content'] ) && null !== get_block_bindings_source( 'core/pattern-overrides' );
 	if ( $has_pattern_overrides ) {
 		$filter_block_context = static function ( $context ) use ( $attributes ) {
 			$context['pattern/overrides'] = $attributes['content'];
 			return $context;
 		};
 		add_filter( 'render_block_context', $filter_block_context, 1 );
+
+		$filter_pattern_overrides_bindings = static function ( $parsed_block ) {
+			$supported_block_attrs = array(
+				'core/paragraph' => array( 'content' ),
+				'core/heading'   => array( 'content' ),
+				'core/image'     => array( 'id', 'url', 'title', 'alt' ),
+				'core/button'    => array( 'url', 'text', 'linkTarget', 'rel' ),
+			);
+
+			if (
+				// Return early if the block isn't one of the supported block types,
+				! isset( $supported_block_attrs[ $parsed_block['blockName'] ] ) ||
+				// or doesn't have a name,
+				empty( $parsed_block['attrs']['metadata']['name'] ) ||
+				// or already has bindings.
+				! empty( $parsed_block['attrs']['metadata']['bindings'] )
+			) {
+				return $parsed_block;
+			}
+
+			$bindings = array();
+			foreach ( $supported_block_attrs[ $parsed_block['blockName'] ] as $attribute_name ) {
+				$bindings[ $attribute_name ] = array( 'source' => 'core/pattern-overrides' );
+			}
+			$parsed_block['attrs']['metadata']['bindings'] = $bindings;
+
+			return $parsed_block;
+		};
+		add_filter( 'render_block_data', $filter_pattern_overrides_bindings, 10, 1 );
 	}
 
 	$content = do_blocks( $content );
 	unset( $seen_refs[ $attributes['ref'] ] );
 
 	if ( $has_pattern_overrides ) {
 		remove_filter( 'render_block_context', $filter_block_context, 1 );
+		remove_filter( 'render_block_data', $filter_pattern_overrides_bindings, 10 );
 	}
 
 	return $content;