From 78c928ad4466e9346a8d0d32b9adbc1dde04e31e Mon Sep 17 00:00:00 2001
From: Andrew Ozz <azaozz@git.wordpress.org>
Date: Fri, 8 Aug 2014 20:53:31 +0000
Subject: [PATCH] Editor: use the `post_edit_form_tag` action to add
 autocomplete="off" to the whole form on the Add/Edit Post screen in WebKit.
 Prevents editor problems when the browser's Back button is used. Fixes
 #28037.

git-svn-id: https://develop.svn.wordpress.org/trunk@29448 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/includes/misc.php | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/wp-admin/includes/misc.php b/src/wp-admin/includes/misc.php
index 1d2d26493a..949ea0efe5 100644
--- a/src/wp-admin/includes/misc.php
+++ b/src/wp-admin/includes/misc.php
@@ -826,3 +826,20 @@ function heartbeat_autosave( $response, $data ) {
 }
 // Run later as we have to set DOING_AUTOSAVE for back-compat
 add_filter( 'heartbeat_received', 'heartbeat_autosave', 500, 2 );
+
+/**
+ * Disables autocomplete on the 'post' form (Add/Edit Post screens) for WebKit browsers,
+ * as they disregard the autocomplete setting on the editor textarea. That can break the editor
+ * when the user navigates to it with the browser's Back button. See #28037
+ *
+ * @since 4.0 
+ */
+function post_form_autocomplete_off() {
+	global $is_safari, $is_chrome;
+
+	if ( $is_safari || $is_chrome ) {
+		echo ' autocomplete="off"';
+	}
+}
+
+add_action( 'post_edit_form_tag', 'post_form_autocomplete_off' );