From 31df8ff3a890d0e3b30d185e1193871bf048998e Mon Sep 17 00:00:00 2001
From: Ed Sanders <esanders@wikimedia.org>
Date: Mon, 31 Mar 2014 16:07:59 -0700
Subject: [PATCH] Emit rerender on math node if Tex image is not present

This happens with then empty tag is rendered.

Bug: 63093
Change-Id: I5cf731cedda134d2542946da82997bddf58b00b5
---
 modules/VisualEditor/ve.ce.MWMathNode.js | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/modules/VisualEditor/ve.ce.MWMathNode.js b/modules/VisualEditor/ve.ce.MWMathNode.js
index d5dd2ed..54ee39d 100644
--- a/modules/VisualEditor/ve.ce.MWMathNode.js
+++ b/modules/VisualEditor/ve.ce.MWMathNode.js
@@ -48,7 +48,9 @@ ve.ce.MWMathNode.prototype.onParseSuccess = function ( deferred, response ) {
 };
 
 /** */
-ve.ce.MWExtensionNode.prototype.afterRender = function ( domElements ) {
+ve.ce.MWMathNode.prototype.afterRender = function ( domElements ) {
+	var $img;
+
 	if ( this.$( domElements ).is( 'span.tex' ) ) {
 		// MathJax
 		MathJax.Hub.Queue(
@@ -56,10 +58,16 @@ ve.ce.MWExtensionNode.prototype.afterRender = function ( domElements ) {
 			[ this, this.emit, 'rerender' ]
 		);
 	} else {
+		$img = this.$element.find( 'img.tex' );
 		// Rerender after image load
-		this.$element.find( 'img.tex' ).on( 'load', ve.bind( function () {
+		if ( $img.length ) {
+			$img.on( 'load', ve.bind( function () {
+				this.emit( 'rerender' );
+			}, this ) );
+		} else {
+			// Passing an empty string returns no image, so rerender immediately
 			this.emit( 'rerender' );
-		}, this ) );
+		}
 	}
 };