From 6bae3a6edac2aa3f75a04bfb7ca667fa985a5cbb Mon Sep 17 00:00:00 2001
From: Mark Jaquith <markjaquith@git.wordpress.org>
Date: Thu, 4 Apr 2013 16:03:21 +0000
Subject: [PATCH] A little more revisions js/php cleanup. see #23901. props
 kovshenin, ocean90.

git-svn-id: https://develop.svn.wordpress.org/trunk@23904 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-admin/includes/ajax-actions.php | 10 +++++++---
 wp-admin/js/revisions.js           |  9 +++------
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/wp-admin/includes/ajax-actions.php b/wp-admin/includes/ajax-actions.php
index 4878e4ad41..5e8f670325 100644
--- a/wp-admin/includes/ajax-actions.php
+++ b/wp-admin/includes/ajax-actions.php
@@ -2186,6 +2186,7 @@ function wp_ajax_revisions_data() {
 			continue;
 
 		$revision_from_date_author = '';
+		$is_current_revision = false;
 		$count++;
 		// return blank data for diffs to the left of the left handle (for right handel model)
 		// or to the right of the right handle (for left handel model)
@@ -2235,10 +2236,12 @@ function wp_ajax_revisions_data() {
 		elseif ( wp_is_post_autosave( $left_revision ) )
 			$revision_from_date_author = sprintf( $autosavef, $revision_from_date_author );
 
-		if ( $revision->post_modified === $post->post_modified )
+		if ( $revision->post_modified === $post->post_modified ) {
 			$revision_date_author = sprintf( $currentf, $revision_date_author );
-		elseif ( wp_is_post_autosave( $revision ) )
+			$is_current_revision = true;
+		} elseif ( wp_is_post_autosave( $revision ) ) {
 			$revision_date_author = sprintf( $autosavef, $revision_date_author );
+		}
 
 		/* translators: revision date short format, see http://php.net/date */
 		$date_short_format = _x( 'j M @ G:i', 'revision date short format');
@@ -2275,7 +2278,8 @@ function wp_ajax_revisions_data() {
 				'titleTooltip'         => $revision_date_author_short,
 				'restoreLink'          => urldecode( $restore_link ),
 				'revision_toload'      => true,
-				'previous_revision_id' => $previous_revision_id
+				'previous_revision_id' => $previous_revision_id,
+				'is_current_revision'  => $is_current_revision,
 			);
 		}
 		$previous_revision_id = $revision->ID;
diff --git a/wp-admin/js/revisions.js b/wp-admin/js/revisions.js
index 8f15c01fbf..f1149f0469 100644
--- a/wp-admin/js/revisions.js
+++ b/wp-admin/js/revisions.js
@@ -633,11 +633,7 @@ window.wp = window.wp || {};
 			this.toogleCompareTwoCheckbox();
 
 			// hide the restore button when on the last sport/current post data
-			if ( Diff.rightDiff === Diff.revisions.length ){
-				$( '#restore-revision' ).hide();
-			} else {
-				$( '#restore-revision' ).show();
-			}
+			$( '#restore-revision' ).toggle( ! Diff.revisions.at( Diff.rightDiff - 1 ).get( 'is_current_revision' ) );
 
 			return this;
 		},
@@ -703,7 +699,8 @@ window.wp = window.wp || {};
 			lines_added: 0,
 			lines_deleted: 0,
 			scope_of_changes: 'none',
-			previous_revision_id: 0
+			previous_revision_id: 0,
+			is_current_revision: false
 		},
 
 		url: function() {