From cd6b63974bad9c88e6b9a8e69ddc2a5ce54c48c1 Mon Sep 17 00:00:00 2001
From: piro <piro@599a83e7-65a4-db11-8015-0010dcdd6dc2>
Date: Tue, 12 May 2009 17:35:06 +0000
Subject: [PATCH] =?UTF-8?q?=E7=A9=BA=E3=81=AE=E3=82=BF=E3=83=96=E3=81=8C1?=
 =?UTF-8?q?=E3=81=A4=E3=81=A0=E3=81=91=E3=81=82=E3=82=8B=E3=81=A8=E3=81=8D?=
 =?UTF-8?q?=E3=81=AB=E9=96=89=E3=81=98=E3=81=9F=E3=82=BF=E3=83=96=E3=82=92?=
 =?UTF-8?q?=E9=96=8B=E3=81=8D=E7=9B=B4=E3=81=99=E3=81=A8=E3=82=BF=E3=83=96?=
 =?UTF-8?q?=E3=83=90=E3=83=BC=E3=81=AE=E4=B8=8A=E7=AB=AF=E3=81=AB=E3=82=B9?=
 =?UTF-8?q?=E3=83=9A=E3=83=BC=E3=82=B9=E3=81=8C=E7=A9=BA=E3=81=84=E3=81=A6?=
 =?UTF-8?q?=E3=81=97=E3=81=BE=E3=81=86=E5=95=8F=E9=A1=8C=E3=82=92=E4=BF=AE?=
 =?UTF-8?q?=E6=AD=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

git-svn-id: http://www.cozmixng.org/repos/piro/treestyletab/trunk@4415 599a83e7-65a4-db11-8015-0010dcdd6dc2
---
 content/treestyletab/treestyletabbrowser.js | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/content/treestyletab/treestyletabbrowser.js b/content/treestyletab/treestyletabbrowser.js
index 6ae7f51d..87d50445 100644
--- a/content/treestyletab/treestyletabbrowser.js
+++ b/content/treestyletab/treestyletabbrowser.js
@@ -3202,7 +3202,20 @@ TreeStyleTabBrowser.prototype = {
 		var radian = 90 * Math.PI / 180;
 		var self   = this;
 		aTab.__treestyletab__updateTabCollapsedTask = function(aTime, aBeginning, aChange, aDuration) {
-			if (aTime >= aDuration) {
+			// If this is the last tab, negative scroll happens.
+			// Then, we shouldn't do animation.
+			var stopAnimation = false;
+			var scrollBox = self.scrollBox;
+			if (scrollBox) {
+				if (scrollBox._scrollbox) scrollBox = scrollBox._scrollbox;
+				if ('scrollTop' in scrollBox &&
+					(scrollBox.scrollTop < 0 || scrollBox.scrollLeft < 0)) {
+					scrollBox.scrollTop = 0;
+					scrollBox.scrollLeft = 0;
+					stopAnimation = true;
+				}
+			}
+			if (aTime >= aDuration || stopAnimation) {
 				delete aTab.__treestyletab__updateTabCollapsedTask;
 				aTab.removeAttribute(self.kCOLLAPSING);
 				if (aCollapsed) aTab.setAttribute(self.kCOLLAPSED_DONE, true);