Merge refactor from gutenberg#77361

alecgeatches · alecgeatches · commit 7cf2453d5928 · 2026-04-15T11:56:21.000-06:00
diff --git a/src/wp-admin/includes/post.php b/src/wp-admin/includes/post.php
@@ -2406,8 +2406,6 @@ function the_block_editor_meta_boxes() {
 	<?php
 
 	$meta_boxes_per_location = array();
-	$rtc_compatible_ids      = array();
-
 	foreach ( $locations as $location ) {
 		$meta_boxes_per_location[ $location ] = array();
 
@@ -2426,20 +2424,22 @@ function the_block_editor_meta_boxes() {
 					continue;
 				}
 
-				// Track meta boxes marked as compatible with real-time collaboration.
-				if ( isset( $meta_box['args']['__rtc_compatible_meta_box'] ) && $meta_box['args']['__rtc_compatible_meta_box'] ) {
-					$rtc_compatible_ids[] = $meta_box['id'];
-				}
-
 				// If a meta box is just here for back compat, don't show it in the block editor.
 				if ( isset( $meta_box['args']['__back_compat_meta_box'] ) && $meta_box['args']['__back_compat_meta_box'] ) {
 					continue;
 				}
 
-				$meta_boxes_per_location[ $location ][] = array(
+				$meta_box_entry = array(
 					'id'    => $meta_box['id'],
 					'title' => $meta_box['title'],
 				);
+
+				// Mark meta boxes compatible with real-time collaboration.
+				if ( ! empty( $meta_box['args']['__rtc_compatible_meta_box'] ) ) {
+					$meta_box_entry['__rtc_compatible'] = true;
+				}
+
+				$meta_boxes_per_location[ $location ][] = $meta_box_entry;
 			}
 		}
 	}
@@ -2466,30 +2466,6 @@ function the_block_editor_meta_boxes() {
 		printf( "<script>\n%s\n</script>\n", trim( $script ) );
 	}
 
-	/*
-	 * If collaboration is enabled and any meta boxes are marked as RTC-compatible,
-	 * pass their IDs to the editor so it can determine which meta boxes are safe
-	 * to use alongside real-time collaboration.
-	 */
-	if ( wp_is_collaboration_enabled() && ! empty( $rtc_compatible_ids ) ) {
-		$rtc_script = 'window._wpLoadBlockEditor.then( function() {
-			wp.data.dispatch( \'core/edit-post\' ).setRtcCompatibleMetaBoxIds( '
-			. wp_json_encode( array_values( array_unique( $rtc_compatible_ids ) ) )
-			. ' );
-		} );';
-
-		wp_add_inline_script( 'wp-edit-post', $rtc_script );
-
-		/*
-		 * When `wp-edit-post` is output in the `<head>`, the inline script needs to be
-		 * manually printed. Otherwise, inline scripts for `wp-edit-post` will not be
-		 * printed again after this point.
-		 */
-		if ( wp_script_is( 'wp-edit-post', 'done' ) ) {
-			printf( "<script>\n%s\n</script>\n", trim( $rtc_script ) );
-		}
-	}
-
 	/*
 	 * If the 'postcustom' meta box is enabled, then we need to perform
 	 * some extra initialization on it.
