From 0f91030813ff30ea1e35337a85a298ca202b5962 Mon Sep 17 00:00:00 2001
From: piro <piro@599a83e7-65a4-db11-8015-0010dcdd6dc2>
Date: Thu, 1 Apr 2010 02:38:33 +0000
Subject: [PATCH] =?UTF-8?q?=E3=83=96=E3=83=83=E3=82=AF=E3=83=9E=E3=83=BC?=
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git-svn-id: http://www.cozmixng.org/repos/piro/treestyletab/trunk@6542 599a83e7-65a4-db11-8015-0010dcdd6dc2
---
 content/treestyletab/bookmarksOverlay.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/content/treestyletab/bookmarksOverlay.js b/content/treestyletab/bookmarksOverlay.js
index c083e808..881d7932 100644
--- a/content/treestyletab/bookmarksOverlay.js
+++ b/content/treestyletab/bookmarksOverlay.js
@@ -108,10 +108,12 @@ var TreeStyleTabBookmarksService = {
 		if (aDefaultParentID === void(0))
 			aDefaultParentID = -1;
 
+		/* Get array of parents. The index becomes to -1,
+		   if there is NO PARENT or the parent is THE TAB ITSELF. */
 		var treeStructure = aIDs.map(function(aId, aIndex) {
 				let id = this.getParentItem(aId);
 				let index = aIDs.indexOf(id);
-				return index > aIndex || index < -1 ? aDefaultParentID : index ;
+				return index >= aIndex ? aDefaultParentID : index ;
 			}, this);
 
 		/* Correct patterns like:
@@ -147,7 +149,8 @@ var TreeStyleTabBookmarksService = {
 				return aPosition - offset;
 			});
 
-		// smaller than -1 (-2, etc.) are invalid values.
+		/* The final step, this validates all of values.
+		   Smaller than -1 is invalid, so it becomes to -1. */
 		return treeStructure.map(function(aIndex) {
 				return aIndex < -1 ? aDefaultParentID : aIndex ;
 			}, this);