diff --git a/wp-admin/includes/post.php b/wp-admin/includes/post.php
index 7f49482ba3..c664be627b 100644
--- a/wp-admin/includes/post.php
+++ b/wp-admin/includes/post.php
@@ -2039,6 +2039,12 @@ function use_block_editor_for_post( $post ) {
return false;
}
+ // We're in the meta box loader, so don't use the block editor.
+ if ( isset( $_GET['meta-box-loader'] ) ) {
+ check_admin_referer( 'meta-box-loader' );
+ return false;
+ }
+
$use_block_editor = use_block_editor_for_post_type( $post->post_type );
/**
@@ -2166,3 +2172,138 @@ function get_block_editor_server_block_settings() {
return $blocks;
}
+
+/**
+ * Renders the meta boxes forms.
+ *
+ * @since 5.0.0
+ */
+function the_block_editor_meta_boxes() {
+ global $post, $current_screen, $wp_meta_boxes;
+
+ // Handle meta box state.
+ $_original_meta_boxes = $wp_meta_boxes;
+
+ /**
+ * Fires right before the meta boxes are rendered.
+ *
+ * This allows for the filtering of meta box data, that should already be
+ * present by this point. Do not use as a means of adding meta box data.
+ *
+ * @since 5.0.0
+ *
+ * @param array $wp_meta_boxes Global meta box state.
+ */
+ $wp_meta_boxes = apply_filters( 'filter_block_editor_meta_boxes', $wp_meta_boxes );
+ $locations = array( 'side', 'normal', 'advanced' );
+ $priorities = array( 'high', 'sorted', 'core', 'default', 'low' );
+
+ // Render meta boxes.
+ ?>
+
+
+
+
+ id ][ $location ] ) ) {
+ continue;
+ }
+
+ foreach ( $priorities as $priority ) {
+ if ( ! isset( $wp_meta_boxes[ $current_screen->id ][ $location ][ $priority ] ) ) {
+ continue;
+ }
+
+ $meta_boxes = (array) $wp_meta_boxes[ $current_screen->id ][ $location ][ $priority ];
+ foreach ( $meta_boxes as $meta_box ) {
+ if ( ! empty( $meta_box['title'] ) ) {
+ $meta_boxes_per_location[ $location ][] = array(
+ 'id' => $meta_box['id'],
+ 'title' => $meta_box['title'],
+ );
+ }
+ }
+ }
+ }
+
+ /**
+ * Sadly we probably can not add this data directly into editor settings.
+ *
+ * Some meta boxes need admin_head to fire for meta box registry.
+ * admin_head fires after admin_enqueue_scripts, which is where we create our
+ * editor instance.
+ */
+ $script = 'window._wpLoadBlockEditor.then( function() {
+ wp.data.dispatch( \'core/edit-post\' ).setAvailableMetaBoxesPerLocation( ' . wp_json_encode( $meta_boxes_per_location ) . ' );
+ } );';
+
+ wp_add_inline_script( 'wp-edit-post', $script );
+
+ /**
+ * When `wp-edit-post` is output in the ``, the inline script needs to be manually printed. Otherwise,
+ * meta boxes will not display because inline scripts for `wp-edit-post` will not be printed again after this point.
+ */
+ if ( wp_script_is( 'wp-edit-post', 'done' ) ) {
+ printf( "\n", trim( $script ) );
+ }
+
+ // Reset meta box data.
+ $wp_meta_boxes = $_original_meta_boxes;
+}
+
+/**
+ * Renders the hidden form required for the meta boxes form.
+ *
+ * @since 5.0.0
+ *
+ * @param WP_Post $post Current post object.
+ */
+function the_block_editor_meta_box_post_form_hidden_fields( $post ) {
+ $form_extra = '';
+ if ( 'auto-draft' === $post->post_status ) {
+ $form_extra .= "";
+ }
+ $form_action = 'editpost';
+ $nonce_action = 'update-post_' . $post->ID;
+ $form_extra .= "";
+ $referer = wp_get_referer();
+ $current_user = wp_get_current_user();
+ $user_id = $current_user->ID;
+ wp_nonce_field( $nonce_action );
+ ?>
+
+
+
+
+
+
+
+