Ticket #11049: preview_template.diff

wp-includes/post.php

@@ -2592 +2592 @@
 
         $post = get_post($post_ID);
 
-        if ( !empty($page_template) && 'page' == $data['post_type'] ) {
+        if ( !empty($page_template) && (('page' == $data['post_type']) || ('revision' == $data['post_type'])) ) {
                 $post->page_template = $page_template;
                 $page_templates = get_page_templates();
                 if ( 'default' != $page_template && !in_array($page_template, $page_templates) ) {
@@ -2601 +2601 @@
                         else
                                 return 0;
                 }
-                update_post_meta($post_ID, '_wp_page_template',  $page_template);
+                if ( 'page' == $data['post_type'] ) {
+                        update_post_meta($post_ID, '_wp_page_template',  $page_template);
+                } elseif ('revision' == $data['post_type'] ) {
+                        //update the meta for autosave, page preview
+                        update_post_meta($post_ID, '_wp_preview_page_template',  $page_template);
+                }
         }
 
         wp_transition_post_status($data['post_status'], $previous_status, $post);
@@ -4629 +4634 @@
         $return['post_name']     = $autosave ? "$post[ID]-autosave" : "$post[ID]-revision";
         $return['post_date']     = isset($post['post_modified']) ? $post['post_modified'] : '';
         $return['post_date_gmt'] = isset($post['post_modified_gmt']) ? $post['post_modified_gmt'] : '';
+        
+        if ( $autosave ) {
+                $return['page_template'] = isset($post['page_template']) ? $post['page_template'] : 'default';
+        }
 
         return $return;
 }

wp-includes/theme.php

@@ -946 +946 @@
  */
 function get_page_template() {
         $id = get_queried_object_id();
-        $template = get_post_meta($id, '_wp_page_template', true);
+        if ( is_preview() ) { //a page preview may have a different template than the published page
+                $template = get_post_meta($id, '_wp_preview_page_template', true);
+        } else {
+                $template = get_post_meta($id, '_wp_page_template', true);
+        }
         $pagename = get_query_var('pagename');
 
         if ( !$pagename && $id > 0 ) {