Backport new entity block binding binding

src/wp-includes/block-bindings.php

@@ -140,11 +140,13 @@ function get_block_bindings_source( string $source_name ) {
  */
 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/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 =

src/wp-includes/block-bindings/entity.php

@@ -0,0 +1,106 @@
+<?php
+/**
+ * Entity source for the block bindings.
+ *
+ * @since 6.9.0
+ * @package WordPress
+ * @subpackage Block Bindings
+ */
+
+/**
+ * Gets value for Entity source.
+ *
+ * @since 6.9.0
+ * @access private
+ *
+ * @param array    $source_args    Array containing source arguments used to look up the override value.
+ *                                 Example: array( "key" => "url" ).
+ * @param WP_Block $block_instance The block instance.
+ * @return mixed The value computed for the source.
+ */
+function _block_bindings_entity_get_value( array $source_args, $block_instance ) {
+	// Get the key from source args - no key means invalid binding
+	if ( empty( $source_args['key'] ) ) {
+		return null;
+	}
+
+	$key = $source_args['key'];
+
+	// For now, only support 'url' key
+	if ( 'url' !== $key ) {
+		return null;
+	}
+
+	// Read entity data from block attributes
+	$entity_id = $block_instance->attributes['id'] ?? null;
+	$type      = $block_instance->attributes['type'] ?? '';
+	$kind      = $block_instance->attributes['kind'] ?? '';
+
+	if ( empty( $entity_id ) ) {
+		return null;
+	}
+
+	try {
+		// Handle post types
+		if ( 'post-type' === $kind ) {
+			$post = get_post( $entity_id );
+			if ( ! $post ) {
+				return null;
+			}
+
+			$permalink = get_permalink( $entity_id );
+			if ( is_wp_error( $permalink ) ) {
+				return null;
+			}
+
+			return esc_url( $permalink );
+		}
+
+		// Handle taxonomies
+		if ( 'taxonomy' === $kind ) {
+			// Convert 'tag' back to 'post_tag' for API calls
+			// See update-attributes.js line 166 for the reverse conversion
+			$taxonomy_slug = ( 'tag' === $type ) ? 'post_tag' : $type;
+			$term          = get_term( $entity_id, $taxonomy_slug );
+
+			if ( is_wp_error( $term ) || ! $term ) {
+				return null;
+			}
+
+			$term_link = get_term_link( $term );
+			if ( is_wp_error( $term_link ) ) {
+				return null;
+			}
+
+			return esc_url( $term_link );
+		}
+
+		// Unknown entity kind
+		return null;
+	} catch ( Exception $e ) {
+		return null;
+	}
+}
+
+/**
+ * Registers Entity source in the block bindings registry.
+ *
+ * @since 6.9.0
+ * @access private
+ */
+function _register_block_bindings_entity_source() {
+	if ( get_block_bindings_source( 'core/entity' ) ) {
+		// The source is already registered.
+		return;
+	}
+
+	register_block_bindings_source(
+		'core/entity',
+		array(
+			'label'              => _x( 'Entity', 'block bindings source' ),
+			'get_value_callback' => '_block_bindings_entity_get_value',
+		)
+	);
+}
+
+add_action( 'init', '_register_block_bindings_entity_source' );