From 171a955ec9c67993c71657da82c5a629bc85b6b9 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Mon, 9 Mar 2015 23:06:11 +0100
Subject: [PATCH] Work-around for a glitch in Firefox and calculation issue in
 Chrome

---
 wcfsetup/install/files/js/WCF.js         | 22 +++++++++++-----------
 wcfsetup/install/files/style/layout.less | 13 +++++++++----
 2 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/wcfsetup/install/files/js/WCF.js b/wcfsetup/install/files/js/WCF.js
index f0ac00885b..cde4d8da72 100755
--- a/wcfsetup/install/files/js/WCF.js
+++ b/wcfsetup/install/files/js/WCF.js
@@ -12209,6 +12209,11 @@ WCF.Category.FlexibleCategoryList = Class.extend({
 		
 		this._buildStructure();
 		
+		if (this._list.children('li').length < 2) {
+			this._list.addClass('flexibleCategoryListDisabled');
+			return;
+		}
+		
 		if ($.browser.chrome) {
 			this._resize();
 			
@@ -12251,19 +12256,14 @@ WCF.Category.FlexibleCategoryList = Class.extend({
 		var $items = this._list.children('li');
 		
 		$items.each(function(index, item) {
-			if ($referenceOffset === -1) {
+			if ($referenceOffset === -1 || index + 1 === $items.length || $items[index + 1].offsetLeft != $referenceOffset) {
+				var $item = $(item);
+				var $height = $item.outerHeight(true);
+				var $offset = $item.position();
+				
+				$realBottom = Math.max($realBottom, $offset.top + $height);
 				$referenceOffset = item.offsetLeft;
 			}
-			else {
-				if (index + 1 === $items.length || $items[index + 1].offsetLeft != $referenceOffset) {
-					var $item = $(item);
-					var $height = $item.outerHeight(true);
-					var $offset = $item.position();
-					
-					$realBottom = Math.max($realBottom, $offset.top + $height);
-					$referenceOffset = item.offsetLeft;
-				}
-			}
 		});
 		
 		this._list.css('max-height', $realBottom + 'px');
diff --git a/wcfsetup/install/files/style/layout.less b/wcfsetup/install/files/style/layout.less
index 364d4e1eeb..59d900612e 100644
--- a/wcfsetup/install/files/style/layout.less
+++ b/wcfsetup/install/files/style/layout.less
@@ -1177,7 +1177,7 @@ html[dir="rtl"] {
 		}
 	}
 	
-	.flexibleCategoryList {
+	.flexibleCategoryList:not(.flexibleCategoryListDisabled) {
 		/* WebKit */
 		-webkit-column-count: 2;
 		
@@ -1191,9 +1191,6 @@ html[dir="rtl"] {
 			/* WebKit */
 			-webkit-column-break-inside: avoid;
 			
-			/* Firefox */
-			page-break-inside: avoid;
-			
 			/* CSS 3 / Internet Explorer */
 			break-inside: avoid;
 			
@@ -1206,6 +1203,14 @@ html[dir="rtl"] {
 			}
 		}
 	}
+	
+	/* Firefox */
+	@-moz-document url-prefix() {
+		.flexibleCategoryList:not(.flexibleCategoryListDisabled) > li {
+			display: block;
+			overflow: hidden;
+		}
+	}
 }
 
 .sidebarNestedCategoryList {
-- 
2.20.1