From 72120bb87fe34895cd52e3e17eb7f020ab6950a7 Mon Sep 17 00:00:00 2001
From: Alexander Larsson <alexl@redhat.com>
Date: Fri, 4 Mar 2011 14:21:17 +0100
Subject: [PATCH] dnd: Avoid division by zero, etc for zero-size actors

When rescaling due to a possible parent actor resize avoid problems
if the parent width is zero.

https://bugzilla.gnome.org/show_bug.cgi?id=643786
---
 js/ui/dnd.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/js/ui/dnd.js b/js/ui/dnd.js
index a755057f1..87515563f 100644
--- a/js/ui/dnd.js
+++ b/js/ui/dnd.js
@@ -480,7 +480,9 @@ _Draggable.prototype = {
             let [parentX, parentY] = this._dragOrigParent.get_transformed_position();
             let [parentWidth, parentHeight] = this._dragOrigParent.get_size();
             let [parentScaledWidth, parentScaledHeight] = this._dragOrigParent.get_transformed_size();
-            let parentScale = parentScaledWidth / parentWidth;
+            let parentScale = 1.0;
+            if (parentWidth != 0)
+                parentScale = parentScaledWidth / parentWidth;
 
             x = parentX + parentScale * this._dragOrigX;
             y = parentY + parentScale * this._dragOrigY;