From ae404b15febf463955490c3544fcf9da975e7857 Mon Sep 17 00:00:00 2001
From: "sspitzer@mozilla.org" <sspitzer@mozilla.org>
Date: Tue, 21 Aug 2007 22:01:28 -0700
Subject: [PATCH] fix for bug #343370.  additional scenario where tab scrolling
 does not handle window resize well.  cache the tab strip width and only
 adjust the tabstrip, scroll and ensure the selected tab is visible if the
 width changes.  r=asaf

---
 browser/base/content/tabbrowser.xml | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/browser/base/content/tabbrowser.xml b/browser/base/content/tabbrowser.xml
index 56aee8e0df8..a43df2d97de 100644
--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -2414,14 +2414,21 @@
 
           var self = this;
           function onResize() {
-            self.adjustTabstrip(false);
-            self.mTabstrip.scrollBoxObject
-                          .ensureElementIsVisible(self.selectedItem);
+            var width = self.mTabstrip.boxObject.width;
+            if (width != self.mTabstripWidth) {
+              self.adjustTabstrip(false);
+              self.mTabstrip.scrollByIndex(1);
+              self.mTabstrip.scrollBoxObject
+                            .ensureElementIsVisible(self.selectedItem);
+              self.mTabstripWidth = width;
+            }
           }
           window.addEventListener("resize", onResize, false);
         ]]>
       </constructor>
 
+      <field name="mTabstripWidth">0</field>
+
       <field name="mTabstrip">
         document.getAnonymousElementByAttribute(this, "anonid", "arrowscrollbox");
       </field>
@@ -2563,7 +2570,7 @@
     <handlers>
       <handler event="TabOpen"   action="this.adjustTabstrip(false);"/>
       <handler event="TabClose"  action="this.adjustTabstrip(true);"/>
-      <handler event="TabSelect" action="this._handleTabSelect()"/>
+      <handler event="TabSelect" action="this._handleTabSelect();"/>
     </handlers>
   </binding>