From a844db32e2d9ed4312cc37d7c994d9e079921840 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Thu, 13 Apr 2017 22:41:50 +0000
Subject: [PATCH] Administration: Add "(link opens in a new window)" as a
 screen reader text for "Preview" link on Edit Post screen.

Props rianrietveld.
Fixes #40185.

git-svn-id: https://develop.svn.wordpress.org/trunk@40422 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/includes/meta-boxes.php | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/wp-admin/includes/meta-boxes.php b/src/wp-admin/includes/meta-boxes.php
index 23ca2473f6..ba43c7dbda 100644
--- a/src/wp-admin/includes/meta-boxes.php
+++ b/src/wp-admin/includes/meta-boxes.php
@@ -50,10 +50,16 @@ function post_submit_meta_box( $post, $args = array() ) {
 <?php
 $preview_link = esc_url( get_preview_post_link( $post ) );
 if ( 'publish' == $post->post_status ) {
-	$preview_button = __( 'Preview Changes' );
+	$preview_button_text = __( 'Preview Changes' );
 } else {
-	$preview_button = __( 'Preview' );
+	$preview_button_text = __( 'Preview' );
 }
+
+$preview_button = sprintf( '%1$s<span class="screen-reader-text"> %2$s</span>',
+	$preview_button_text,
+	/* translators: accessibility text */
+	__( '(link opens in a new window)' )
+);
 ?>
 <a class="preview button" href="<?php echo $preview_link; ?>" target="wp-preview-<?php echo (int) $post->ID; ?>" id="post-preview"><?php echo $preview_button; ?></a>
 <input type="hidden" name="wp-preview" id="wp-preview" value="" />