From: Veit Lehmann <veit.lehmann@googlemail.com>
Date: Tue, 25 Jun 2013 03:08:44 +0000 (+0300)
Subject: only do article update operations once when scrolling
X-Git-Tag: 1.9~94^2
X-Git-Url: https://git.wh0rd.org/?a=commitdiff_plain;h=d1754390cc1c45eb469daf0221e235ca1a02d555;p=tt-rss.git

only do article update operations once when scrolling

I discovered that DOM operations and function calls were done several times inside the 100px mirror when scrolling through articles. Especially painful on seamless scrolling systems like Mac OS, where dozens of updates would slow down this part dramatically. This change fixes it.
---

diff --git a/js/viewfeed.js b/js/viewfeed.js
index 9c48fbcd..1c5811fe 100644
--- a/js/viewfeed.js
+++ b/js/viewfeed.js
@@ -1281,7 +1281,8 @@ function headlines_scroll_handler(e) {
 				var child = rows[i];
 
 				if ($("headlines-frame").scrollTop < child.offsetTop &&
-					child.offsetTop - $("headlines-frame").scrollTop < 100) {
+					child.offsetTop - $("headlines-frame").scrollTop < 100 &&
+					child.id.replace("RROW-", "") != _active_article_id) {
 
 					if (_active_article_id) {
 						var row = $("RROW-" + _active_article_id);