From 018cee82b79298501f8178e415338d0cbb3c76dc Mon Sep 17 00:00:00 2001
From: SHIMODA Hiroshi <shimoda@clear-code.com>
Date: Tue, 28 Feb 2012 21:51:19 +0900
Subject: [PATCH] Expand all tree internally, after the status is changed from
 "cannot collapse" to "can collapse"

---
 modules/browser.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/modules/browser.js b/modules/browser.js
index ff5c5f6d..e9cd1f31 100644
--- a/modules/browser.js
+++ b/modules/browser.js
@@ -1532,10 +1532,14 @@ TreeStyleTabBrowser.prototype = {
 		}).error(this.defaultDeferredErrorHandler);
 
 		var allowToCollapse = this.getTreePref('allowSubtreeCollapseExpand.'+orient);
-		if (this.allowSubtreeCollapseExpand && !allowToCollapse)
+		var canCollapseStateChanged = this.allowSubtreeCollapseExpand != allowToCollapse;
+
+		if (!allowToCollapse && canCollapseStateChanged)
+			this.collapseExpandAllSubtree(false, false);
+		this.allowSubtreeCollapseExpand = allowToCollapse;
+		if (allowToCollapse && canCollapseStateChanged)
 			this.collapseExpandAllSubtree(false, false);
 
-		this.allowSubtreeCollapseExpand = allowToCollapse;
 		this.maxTreeLevel = this.getTreePref('maxTreeLevel.'+orient);
 
 		this.setTabbrowserAttribute(this.kALLOW_STACK, this.canStackTabs ? 'true' : null);