[bugzilla-gnome-org-extensions] IE compat: deal with CSS Object Model difference

[Krzesimir Nowak <krnowak src gnome org>]

commit 0c0b2b89cecaac7a459470eeaab454e8de4aba97
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Sat Oct 10 23:35:49 2009 -0400

    IE compat: deal with CSS Object Model difference
    
    * In IE7 the element.offsetParent chain doesn't necessarily
      end at the body.
    
    * When window.innerHeight isn't present, use
      document.documentElement.clientHeight. (Right for IE
      strict mode which is all we use, quirks mode is different.)

 js/splinter.js |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/js/splinter.js b/js/splinter.js
index 4ccd6c5..a232d95 100644
--- a/js/splinter.js
+++ b/js/splinter.js
@@ -520,7 +520,7 @@ function getElementPosition(element) {
     var left = element.offsetLeft;
     var top = element.offsetTop;
     var parent = element.offsetParent;
-    while (parent != document.body) {
+    while (parent && parent != document.body) {
         left += parent.offsetLeft;
         top += parent.offsetTop;
         parent = parent.offsetParent;
@@ -530,9 +530,14 @@ function getElementPosition(element) {
 }
 
 function scrollToElement(element) {
+    var windowHeight;
+    if ('innerHeight' in window) // Not IE
+        windowHeight = window.innerHeight;
+    else // IE
+        windowHeight = document.documentElement.clientHeight;
     var pos = getElementPosition(element);
     var yCenter = pos[1] + element.offsetHeight / 2;
-    window.scrollTo(0, yCenter - window.innerHeight / 2);
+    window.scrollTo(0, yCenter - windowHeight / 2);
 }
 
 function onRowDblClick(e) {