wip

wp-includes/block-bindings.php

@@ -129,3 +129,59 @@ function get_all_registered_block_bindings_sources() {
 function get_block_bindings_source( string $source_name ) {
 	return WP_Block_Bindings_Registry::get_instance()->get_registered( $source_name );
 }
+
+/**
+ * Retrieves the list of block attributes supported by block bindings.
+ *
+ * @since 6.9.0
+ *
+ * @param string $block_type The block type whose supported attributes are being retrieved.
+ * @return array The list of block attributes that are supported by block bindings.
+ */
+function get_block_bindings_supported_attributes( $block_type ) {
+	$block_bindings_supported_attributes = array(
+		'core/paragraph'          => array( 'content' ),
+		'core/heading'            => array( 'content' ),
+		'core/image'              => array( 'id', 'url', 'title', 'alt', 'caption' ),
+		'core/button'             => array( 'url', 'text', 'linkTarget', 'rel' ),
+		'core/post-date'          => array( 'datetime' ),
+		'core/navigation-link'    => array( 'url' ),
+		'core/navigation-submenu' => array( 'url' ),
+	);
+
+	$supported_block_attributes =
+		isset( $block_type, $block_bindings_supported_attributes[ $block_type ] ) ?
+			$block_bindings_supported_attributes[ $block_type ] :
+			array();
+
+	/**
+	 * Filters the supported block attributes for block bindings.
+	 *
+	 * @since 6.9.0
+	 *
+	 * @param string[] $supported_block_attributes The block's attributes that are supported by block bindings.
+	 * @param string   $block_type                 The block type whose attributes are being filtered.
+	 */
+	$supported_block_attributes = apply_filters(
+		'block_bindings_supported_attributes',
+		$supported_block_attributes,
+		$block_type
+	);
+
+	/**
+	 * Filters the supported block attributes for block bindings.
+	 *
+	 * The dynamic portion of the hook name, `$block_type`, refers to the block type
+	 * whose attributes are being filtered.
+	 *
+	 * @since 6.9.0
+	 *
+	 * @param string[] $supported_block_attributes The block's attributes that are supported by block bindings.
+	 */
+	$supported_block_attributes = apply_filters(
+		"block_bindings_supported_attributes_{$block_type}",
+		$supported_block_attributes
+	);
+
+	return $supported_block_attributes;
+}