From 75153d6e16510740d62352e828ac60e68f98da18 Mon Sep 17 00:00:00 2001
From: "aaronleventhal%moonset.net" <aaronleventhal%moonset.net>
Date: Tue, 15 Mar 2005 15:32:30 +0000
Subject: [PATCH] Bug 280055. AccessibleObjectFromPoint() broken for XUL tabs
 in Firefox. r+sr=roc

---
 accessible/src/base/nsAccessible.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/accessible/src/base/nsAccessible.cpp b/accessible/src/base/nsAccessible.cpp
index dba03400241b..fa30d0f49089 100644
--- a/accessible/src/base/nsAccessible.cpp
+++ b/accessible/src/base/nsAccessible.cpp
@@ -589,8 +589,15 @@ PRBool nsAccessible::IsPartiallyVisible(PRBool *aIsOffscreen)
                                  NS_STATIC_CAST(PRUint16, (kMinPixels * p2t)), 
                                  &rectVisibility);
 
-  if (rectVisibility == nsRectVisibility_kVisible)
+  if (rectVisibility == nsRectVisibility_kVisible) {
+    // This view says it is visible, but we need to check the parent view chain :(
+    while ((containingView = containingView->GetParent()) != nsnull) {
+      if (containingView->GetVisibility() == nsViewVisibility_kHide) {
+        return PR_FALSE;
+      }
+    }
     return PR_TRUE;
+  }
 
   *aIsOffscreen = rectVisibility != nsRectVisibility_kZeroAreaRect;
   return PR_FALSE;