Ticket #24345: 24345.patch

wp-admin/includes/meta-boxes.php

@@ -38 +38 @@
 <div id="preview-action">
 <?php
 if ( 'publish' == $post->post_status ) {
-        $preview_link = esc_url( get_permalink( $post->ID ) );
+        $preview_link = esc_url( apply_filters( 'preview_post_link', get_permalink( $post->ID ) ) );
         $preview_button = __( 'Preview Changes' );
 } else {
         $preview_link = set_url_scheme( get_permalink( $post->ID ) );