From b8c6b41a5017915e33ff3499e332271cda90bf4a Mon Sep 17 00:00:00 2001
From: Fomafix <fomafix@googlemail.com>
Date: Sun, 29 Mar 2015 13:57:37 +0000
Subject: [PATCH] mediawiki.action.edit.preview: Disable if there is no
 #wpTextbox1

ProofreadPage has custom editforms for Index pages, which are not
supported by the API. These editforms have no #wpTextbox1, so disable
live preview in that case.

Make this check on click avoid T94089.

Bug: T78709
Change-Id: I628d3b226a4294f2878fc4175080a975fd86e507
---
 .../mediawiki.action/mediawiki.action.edit.preview.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/resources/src/mediawiki.action/mediawiki.action.edit.preview.js b/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
index 4aa839cbf1..f24703af29 100644
--- a/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
+++ b/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
@@ -9,15 +9,20 @@
 	 */
 	function doLivePreview( e ) {
 		var isDiff, api, request, postData, copySelectors, section,
-			$wikiPreview, $wikiDiff, $editform, $copyElements, $spinner, $errorBox;
+			$wikiPreview, $wikiDiff, $editform, $textbox, $summary, $copyElements, $spinner, $errorBox;
 
 		isDiff = ( e.target.name === 'wpDiff' );
 		$wikiPreview = $( '#wikiPreview' );
 		$wikiDiff = $( '#wikiDiff' );
 		$editform = $( '#editform' );
+		$textbox = $editform.find( '#wpTextbox1' );
+		$summary = $editform.find( '#wpSummary' );
 		$errorBox = $( '.errorbox' );
 		section = $editform.find( '[name="wpSection"]' ).val();
 
+		if ( $textbox.length === 0 ) {
+			return;
+		}
 		// Show changes for a new section is not yet supported
 		if ( isDiff && section === 'new' ) {
 			return;
@@ -68,8 +73,8 @@
 			action: 'parse',
 			uselang: mw.config.get( 'wgUserLanguage' ),
 			title: mw.config.get( 'wgPageName' ),
-			text: $editform.find( '#wpTextbox1' ).textSelection( 'getContents' ),
-			summary: $editform.find( '#wpSummary' ).textSelection( 'getContents' )
+			text: $textbox.textSelection( 'getContents' ),
+			summary: $summary.textSelection( 'getContents' )
 		};
 
 		if ( section !== '' ) {
-- 
2.20.1