From 0f319917c48e27dde0503afcee8878e2a2f10571 Mon Sep 17 00:00:00 2001
From: Andrew Ozz <azaozz@git.wordpress.org>
Date: Fri, 17 Jun 2016 03:01:32 +0000
Subject: [PATCH] Autosave: improve the notice when the sessionStorage autosave
 is different than the content. - Make it higher priority than the server
 autosave. - Change it so the editors undo and redo can be used. - Replace the
 restore link with a button. - Add better explanation/help.

See #37025.

git-svn-id: https://develop.svn.wordpress.org/trunk@37737 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/includes/template.php | 11 ++--
 src/wp-includes/js/autosave.js     | 80 +++++++++++++++---------------
 2 files changed, 45 insertions(+), 46 deletions(-)

diff --git a/src/wp-admin/includes/template.php b/src/wp-admin/includes/template.php
index 42833231a6..cc590e3dfd 100644
--- a/src/wp-admin/includes/template.php
+++ b/src/wp-admin/includes/template.php
@@ -2003,14 +2003,13 @@ function convert_to_screen( $hook_name ) {
  */
 function _local_storage_notice() {
 	?>
-	<div id="local-storage-notice" class="hidden notice">
+	<div id="local-storage-notice" class="hidden notice is-dismissible">
 	<p class="local-restore">
-		<?php _e('The backup of this post in your browser is different from the version below.'); ?>
-		<a class="restore-backup" href="#"><?php _e('Restore the backup.'); ?></a>
+		<?php _e( 'The backup of this post in your browser is different from the version below.' ); ?>
+		<button type="button" class="button restore-backup"><?php _e('Restore the backup'); ?></button>
 	</p>
-	<p class="undo-restore hidden">
-		<?php _e('Post restored successfully.'); ?>
-		<a class="undo-restore-backup" href="#"><?php _e('Undo.'); ?></a>
+	<p class="help">
+		<?php _e( 'This will replace the current editor content with the last backup version. You can use undo and redo in the editor to get the old content back or to return to the restored version.' ); ?>
 	</p>
 	</div>
 	<?php
diff --git a/src/wp-includes/js/autosave.js b/src/wp-includes/js/autosave.js
index 85d5f84193..b5a8c6c0e6 100644
--- a/src/wp-includes/js/autosave.js
+++ b/src/wp-includes/js/autosave.js
@@ -7,8 +7,8 @@ window.autosave = function() {
 ( function( $, window ) {
 	function autosave() {
 		var initialCompareString,
-		lastTriggerSave = 0,
-		$document = $(document);
+			lastTriggerSave = 0,
+			$document = $(document);
 
 		/**
 		 * Returns the data saved in both local and remote autosave
@@ -19,11 +19,11 @@ window.autosave = function() {
 			var post_name, parent_id, data,
 				time = ( new Date() ).getTime(),
 				cats = [],
-				editor = typeof tinymce !== 'undefined' && tinymce.get('content');
+				editor = getEditor();
 
 			// Don't run editor.save() more often than every 3 sec.
 			// It is resource intensive and might slow down typing in long posts on slow devices.
-			if ( editor && ! editor.isHidden() && time - 3000 > lastTriggerSave ) {
+			if ( editor && editor.isDirty() && ! editor.isHidden() && time - 3000 > lastTriggerSave ) {
 				editor.save();
 				lastTriggerSave = time;
 			}
@@ -88,9 +88,13 @@ window.autosave = function() {
 			$document.trigger( 'autosave-enable-buttons' );
 		}
 
+		function getEditor() {
+			return typeof tinymce !== 'undefined' && tinymce.get('content');
+		}
+
 		// Autosave in localStorage
 		function autosaveLocal() {
-			var restorePostData, undoPostData, blog_id, post_id, hasStorage, intervalTimer,
+			var blog_id, post_id, hasStorage, intervalTimer,
 				lastCompareString,
 				isSuspended = false;
 
@@ -266,7 +270,7 @@ window.autosave = function() {
 				intervalTimer = window.setInterval( save, 15000 );
 
 				$( 'form#post' ).on( 'submit.autosave-local', function() {
-					var editor = typeof tinymce !== 'undefined' && tinymce.get('content'),
+					var editor = getEditor(),
 						post_id = $('#post_ID').val() || 0;
 
 					if ( editor && ! editor.isHidden() ) {
@@ -310,7 +314,8 @@ window.autosave = function() {
 			function checkPost() {
 				var content, post_title, excerpt, $notice,
 					postData = getSavedPostData(),
-					cookie = wpCookies.get( 'wp-saving-post' );
+					cookie = wpCookies.get( 'wp-saving-post' ),
+					$newerAutosaveNotice = $( '#has-newer-autosave' ).parent( '.notice' );
 
 				if ( cookie === post_id + '-saved' ) {
 					wpCookies.remove( 'wp-saving-post' );
@@ -323,11 +328,6 @@ window.autosave = function() {
 					return;
 				}
 
-				// There is a newer autosave. Don't show two "restore" notices at the same time.
-				if ( $( '#has-newer-autosave' ).length ) {
-					return;
-				}
-
 				content = $( '#content' ).val() || '';
 				post_title = $( '#title' ).val() || '';
 				excerpt = $( '#excerpt' ).val() || '';
@@ -338,34 +338,25 @@ window.autosave = function() {
 					return;
 				}
 
-				restorePostData = postData;
-				undoPostData = {
-					content: content,
-					post_title: post_title,
-					excerpt: excerpt
-				};
-
 				$notice = $( '#local-storage-notice' )
 					.insertAfter( $( '.wrap h1, .wrap h2' ).first() )
-					.addClass( 'notice-warning' )
-					.show();
+					.addClass( 'notice-warning' );
 
-				$notice.on( 'click.autosave-local', function( event ) {
-					var $target = $( event.target );
+				if ( $newerAutosaveNotice.length ) {
+					// If there is a "server" autosave notice, hide it.
+					// The data in the session storage is either the same or newer.
+					$newerAutosaveNotice.slideUp( 150, function() {
+						$notice.slideDown( 150 );
+					});
+				} else {
+					$notice.slideDown( 200 );
+				}
 
-					if ( $target.hasClass( 'restore-backup' ) ) {
-						restorePost( restorePostData );
-						$target.parent().hide();
-						$(this).find( 'p.undo-restore' ).show();
-						$notice.removeClass( 'notice-warning' ).addClass( 'notice-success' );
-					} else if ( $target.hasClass( 'undo-restore-backup' ) ) {
-						restorePost( undoPostData );
-						$target.parent().hide();
-						$(this).find( 'p.local-restore' ).show();
-						$notice.removeClass( 'notice-success' ).addClass( 'notice-warning' );
-					}
-
-					event.preventDefault();
+				$notice.find( '.restore-backup' ).on( 'click.autosave-local', function() {
+					restorePost( postData );
+					$notice.fadeTo( 250, 0, function() {
+						$notice.slideUp( 150 );
+					});
 				});
 			}
 
@@ -382,16 +373,25 @@ window.autosave = function() {
 					}
 
 					$( '#excerpt' ).val( postData.excerpt || '' );
-					editor = typeof tinymce !== 'undefined' && tinymce.get('content');
+					editor = getEditor();
 
 					if ( editor && ! editor.isHidden() && typeof switchEditors !== 'undefined' ) {
+						if ( editor.settings.wpautop && postData.content ) {
+							postData.content = switchEditors.wpautop( postData.content );
+						}
+
 						// Make sure there's an undo level in the editor
-						editor.undoManager.add();
-						editor.setContent( postData.content ? switchEditors.wpautop( postData.content ) : '' );
+						editor.undoManager.transact( function() {
+							editor.setContent( postData.content || '' );
+							editor.nodeChanged();
+						});
 					} else {
 						// Make sure the Text editor is selected
 						$( '#content-html' ).click();
-						$( '#content' ).val( postData.content );
+						$( '#content' ).focus();
+						// Using document.execCommand() will let the user undo.
+						document.execCommand( 'selectAll' );
+						document.execCommand( 'insertText', false, postData.content || '' );
 					}
 
 					return true;