From 81e2c10ed58f98ab32668d81d1289d5d1304c56a Mon Sep 17 00:00:00 2001
From: YUKI Hiroshi <shimoda@clear-code.com>
Date: Fri, 9 Sep 2016 15:42:24 +0900
Subject: [PATCH] Open "next sibling tab" more correctly in some cases.

See:
https://github.com/piroor/treestyletab/issues/1143
https://github.com/piroor/treestyletab/issues/1150
---
 modules/base.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/modules/base.js b/modules/base.js
index 71b2faec..86ffed2e 100644
--- a/modules/base.js
+++ b/modules/base.js
@@ -1411,8 +1411,18 @@ var TreeStyleTabBase = inherit(TreeStyleTabConstants, {
 		if (!tab || tab.getAttribute('pinned') == 'true')
 			return false;
 
+		var nextTab = (function findNextSiblingTab(aTab) {
+				if (!aTab)
+					return null;
+
+				var nextTab = this.getNextSiblingTab(aTab);
+				if (nextTab)
+					return nextTab;
+
+				return findNextSiblingTab.call(this, this.getParentTab(aTab));
+			}).call(this, tab);
+
 		var parentTab = this.getParentTab(tab);
-		var nextTab = this.getNextSiblingTab(tab) || this.getNextTab(tab);
 		if (parentTab) {
 			/**
 			 * If the base tab has a parent, open the new tab as a child of