diff -r 53cff4b4a802 -r bde1974c263b web/wp-admin/revision.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/wp-admin/revision.php	Wed Feb 03 15:37:20 2010 +0000
@@ -0,0 +1,220 @@
+<?php
+/**
+ * Revisions administration panel.
+ *
+ * @package WordPress
+ * @subpackage Administration
+ */
+
+/** WordPress Administration Bootstrap */
+require_once('admin.php');
+
+wp_reset_vars(array('revision', 'left', 'right', 'diff', 'action'));
+$revision_id = absint($revision);
+$diff        = absint($diff);
+$left        = absint($left);
+$right       = absint($right);
+
+$parent_file = $redirect = 'edit.php';
+
+switch ( $action ) :
+case 'delete' : // stubs
+case 'edit' :
+	if ( constant('WP_POST_REVISIONS') ) // stub
+		$redirect = remove_query_arg( 'action' );
+	else // Revisions disabled
+		$redirect = 'edit.php';
+	break;
+case 'restore' :
+	if ( !$revision = wp_get_post_revision( $revision_id ) )
+		break;
+	if ( !current_user_can( 'edit_post', $revision->post_parent ) )
+		break;
+	if ( !$post = get_post( $revision->post_parent ) )
+		break;
+
+	if ( !constant('WP_POST_REVISIONS') && !wp_is_post_autosave( $revision ) ) // Revisions disabled and we're not looking at an autosave
+		break;
+
+	check_admin_referer( "restore-post_$post->ID|$revision->ID" );
+
+	wp_restore_post_revision( $revision->ID );
+	$redirect = add_query_arg( array( 'message' => 5, 'revision' => $revision->ID ), get_edit_post_link( $post->ID, 'url' ) );
+	break;
+case 'diff' :
+	if ( !$left_revision  = get_post( $left ) )
+		break;
+	if ( !$right_revision = get_post( $right ) )
+		break;
+
+	if ( !current_user_can( 'read_post', $left_revision->ID ) || !current_user_can( 'read_post', $right_revision->ID ) )
+		break;
+
+	// If we're comparing a revision to itself, redirect to the 'view' page for that revision or the edit page for that post
+	if ( $left_revision->ID == $right_revision->ID ) {
+		$redirect = get_edit_post_link( $left_revision->ID );
+		include( 'js/revisions-js.php' );
+		break;
+	}
+
+	// Don't allow reverse diffs?
+	if ( strtotime($right_revision->post_modified_gmt) < strtotime($left_revision->post_modified_gmt) ) {
+		$redirect = add_query_arg( array( 'left' => $right, 'right' => $left ) );
+		break;
+	}
+
+	if ( $left_revision->ID == $right_revision->post_parent ) // right is a revision of left
+		$post =& $left_revision;
+	elseif ( $left_revision->post_parent == $right_revision->ID ) // left is a revision of right
+		$post =& $right_revision;
+	elseif ( $left_revision->post_parent == $right_revision->post_parent ) // both are revisions of common parent
+		$post = get_post( $left_revision->post_parent );
+	else
+		break; // Don't diff two unrelated revisions
+
+	if ( !constant('WP_POST_REVISIONS') ) { // Revisions disabled
+		if (
+			// we're not looking at an autosave
+			( !wp_is_post_autosave( $left_revision ) && !wp_is_post_autosave( $right_revision ) )
+		||
+			// we're not comparing an autosave to the current post
+			( $post->ID !== $left_revision->ID && $post->ID !== $right_revision->ID )
+		)
+			break;
+	}
+
+	if (
+		// They're the same
+		$left_revision->ID == $right_revision->ID
+	||
+		// Neither is a revision
+		( !wp_get_post_revision( $left_revision->ID ) && !wp_get_post_revision( $right_revision->ID ) )
+	)
+		break;
+
+	$post_title = '<a href="' . get_edit_post_link() . '">' . get_the_title() . '</a>';
+	$h2 = sprintf( __( 'Compare Revisions of &#8220;%1$s&#8221;' ), $post_title );
+
+	$left  = $left_revision->ID;
+	$right = $right_revision->ID;
+
+	$redirect = false;
+	break;
+case 'view' :
+default :
+	if ( !$revision = wp_get_post_revision( $revision_id ) )
+		break;
+	if ( !$post = get_post( $revision->post_parent ) )
+		break;
+
+	if ( !current_user_can( 'read_post', $revision->ID ) || !current_user_can( 'read_post', $post->ID ) )
+		break;
+
+	if ( !constant('WP_POST_REVISIONS') && !wp_is_post_autosave( $revision ) ) // Revisions disabled and we're not looking at an autosave
+		break;
+
+	$post_title = '<a href="' . get_edit_post_link() . '">' . get_the_title() . '</a>';
+	$revision_title = wp_post_revision_title( $revision, false );
+	$h2 = sprintf( __( 'Post Revision for &#8220;%1$s&#8221; created on %2$s' ), $post_title, $revision_title );
+
+	// Sets up the diff radio buttons
+	$left  = $revision->ID;
+	$right = $post->ID;
+
+	$redirect = false;
+	break;
+endswitch;
+
+if ( !$redirect && !in_array( $post->post_type, array( 'post', 'page' ) ) )
+	$redirect = 'edit.php';
+
+if ( $redirect ) {
+	wp_redirect( $redirect );
+	exit;
+}
+
+if ( 'page' == $post->post_type ) {
+	$submenu_file = 'edit-pages.php';
+	$title = __( 'Page Revisions' );
+} else {
+	$submenu_file = 'edit.php';
+	$title = __( 'Post Revisions' );
+}
+
+require_once( 'admin-header.php' );
+
+?>
+
+<div class="wrap">
+
+<h2 class="long-header"><?php echo $h2; ?></h2>
+
+<table class="form-table ie-fixed">
+	<col class="th" />
+<?php if ( 'diff' == $action ) : ?>
+<tr id="revision">
+	<th scope="row"></th>
+	<th scope="col" class="th-full">
+		<span class="alignleft"><?php printf( __('Older: %s'), wp_post_revision_title( $left_revision ) ); ?></span>
+		<span class="alignright"><?php printf( __('Newer: %s'), wp_post_revision_title( $right_revision ) ); ?></span>
+	</th>
+</tr>
+<?php endif;
+
+// use get_post_to_edit filters?
+$identical = true;
+foreach ( _wp_post_revision_fields() as $field => $field_title ) :
+	if ( 'diff' == $action ) {
+		$left_content = apply_filters( "_wp_post_revision_field_$field", $left_revision->$field, $field );
+		$right_content = apply_filters( "_wp_post_revision_field_$field", $right_revision->$field, $field );
+		if ( !$content = wp_text_diff( $left_content, $right_content ) )
+			continue; // There is no difference between left and right
+		$identical = false;
+	} else {
+		add_filter( "_wp_post_revision_field_$field", 'htmlspecialchars' );
+		$content = apply_filters( "_wp_post_revision_field_$field", $revision->$field, $field );
+	}
+	?>
+
+	<tr id="revision-field-<?php echo $field; ?>">
+		<th scope="row"><?php echo esc_html( $field_title ); ?></th>
+		<td><div class="pre"><?php echo $content; ?></div></td>
+	</tr>
+
+	<?php
+
+endforeach;
+
+if ( 'diff' == $action && $identical ) :
+
+	?>
+
+	<tr><td colspan="2"><div class="updated"><p><?php _e( 'These revisions are identical.' ); ?></p></div></td></tr>
+
+	<?php
+
+endif;
+
+?>
+
+</table>
+
+<br class="clear" />
+
+<h2><?php echo $title; ?></h2>
+
+<?php
+
+$args = array( 'format' => 'form-table', 'parent' => true, 'right' => $right, 'left' => $left );
+if ( !constant( 'WP_POST_REVISIONS' ) )
+	$args['type'] = 'autosave';
+
+wp_list_post_revisions( $post, $args );
+
+?>
+
+</div>
+
+<?php
+
+require_once( 'admin-footer.php' );