From 3eafa8dd37a428e56de944611ecdb7be203177d2 Mon Sep 17 00:00:00 2001
From: Fomafix <fomafix@googlemail.com>
Date: Tue, 17 Mar 2015 18:56:47 +0000
Subject: [PATCH] Update HTML title with displaytitle on live preview

Set the new global JavaScript variable 'wgEditMessage' with the name of the message.

Document this global JavaScript variable in
https://www.mediawiki.org/wiki/Manual:Interface/JavaScript#mw.config
after merge.

Bug: T88117
Change-Id: Ida5c1d470908cefd16925bd5455758d25db02113
---
 includes/EditPage.php                                      | 3 +++
 resources/Resources.php                                    | 7 +++++++
 .../src/mediawiki.action/mediawiki.action.edit.preview.js  | 7 +++++++
 3 files changed, 17 insertions(+)

diff --git a/includes/EditPage.php b/includes/EditPage.php
index 94ed9035b4..fe96f9a1cf 100644
--- a/includes/EditPage.php
+++ b/includes/EditPage.php
@@ -2098,6 +2098,9 @@ class EditPage {
 			$displayTitle = $contextTitle->getPrefixedText();
 		}
 		$wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
+		# Transmit the name of the message to JavaScript for live preview
+		# Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
+		$wgOut->addJsConfigVars( 'wgEditMessage', $msg );
 	}
 
 	/**
diff --git a/resources/Resources.php b/resources/Resources.php
index 0b751f63c0..2b12c7a6d3 100644
--- a/resources/Resources.php
+++ b/resources/Resources.php
@@ -1085,6 +1085,13 @@ return array(
 			'mediawiki.jqueryMsg',
 		),
 		'messages' => array(
+			// Keep the uses message keys in sync with EditPage#setHeaders
+			'creating',
+			'editconflict',
+			'editing',
+			'editingcomment',
+			'editingsection',
+			'pagetitle',
 			'otherlanguages',
 			'tooltip-p-lang',
 			'summary-preview',
diff --git a/resources/src/mediawiki.action/mediawiki.action.edit.preview.js b/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
index 84bde7d237..4c6ca12ba1 100644
--- a/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
+++ b/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
@@ -118,6 +118,13 @@
 				}
 				if ( response.parse.displaytitle ) {
 					$( '#firstHeading' ).html( response.parse.displaytitle );
+					document.title = mw.msg(
+						'pagetitle',
+						mw.msg(
+							mw.config.get( 'wgEditMessage', 'editing' ),
+							$( '#firstHeading' ).text()
+						)
+					);
 				}
 				if ( response.parse.categorieshtml ) {
 					$( '#catlinks' ).replaceWith( response.parse.categorieshtml['*'] );
-- 
2.20.1