From 9cfb9cb9fba4dcfd25a0924237681b7cc86a20df Mon Sep 17 00:00:00 2001
From: Derk-Jan Hartman <hartman.wiki@gmail.com>
Date: Mon, 15 Jun 2015 00:13:20 +0200
Subject: [PATCH] Add a wikipage.diff hook

Bug: T53583
Change-Id: Iba54f26537e0a7ffaaf9465e2f44de2e4367abdb
---
 .../mediawiki.action.edit.preview.js              |  1 +
 resources/src/mediawiki/page/startup.js           | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/resources/src/mediawiki.action/mediawiki.action.edit.preview.js b/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
index 5cd4a7e216..6de537abcb 100644
--- a/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
+++ b/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
@@ -106,6 +106,7 @@
 					diffHtml = query.pages[ query.pageids[ 0 ] ]
 						.revisions[ 0 ].diff[ '*' ];
 					$wikiDiff.find( 'table.diff tbody' ).html( diffHtml );
+					mw.hook( 'wikipage.diff' ).fire( $wikiDiff.find( 'table.diff' ) );
 				} catch ( e ) {
 					// "result.blah is undefined" error, ignore
 					mw.log.warn( e );
diff --git a/resources/src/mediawiki/page/startup.js b/resources/src/mediawiki/page/startup.js
index 708dcb5c30..f2509e28fc 100644
--- a/resources/src/mediawiki/page/startup.js
+++ b/resources/src/mediawiki/page/startup.js
@@ -27,6 +27,21 @@
 		 *   root)
 		 */
 		mw.hook( 'wikipage.content' ).fire( $( '#mw-content-text' ) );
+
+		var $diff = $( 'table.diff' );
+		if ( $diff.length ) {
+			/**
+			 * Fired when the diff is added to a page containing a diff
+			 *
+			 * Similar to the {@link mw.hook#event-wikipage_content wikipage.content hook}
+			 * $diff may still be detached when the hook is fired.
+			 *
+			 * @event wikipage_diff
+			 * @member mw.hook
+			 * @param {jQuery} $diff The root element of the MediaWiki diff (`table.diff`).
+			 */
+			mw.hook( 'wikipage.diff' ).fire( $diff.eq( 0 ) );
+		}
 	} );
 
 }( mediaWiki, jQuery ) );
-- 
2.20.1