From 78a31324a071bbbc61c3963f730688befa5c2bc2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lubo=C5=A1=20Lu=C5=88=C3=A1k?= <l.lunak@kde.org>
Date: Thu, 30 Oct 2003 18:12:23 +0000
Subject: [PATCH] Make unobscuredRegion() ignore windows that cannot be visible
 on the same virtual desktop like the window. Prevent B2's titlebars affecting
 each other if they're on different virtual desktops.

svn path=/trunk/kdebase/kwin/; revision=263255
---
 bridge.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/bridge.cpp b/bridge.cpp
index 330c44b2fd..037ffbe257 100644
--- a/bridge.cpp
+++ b/bridge.cpp
@@ -136,6 +136,18 @@ QRegion Bridge::unobscuredRegion( const QRegion& r ) const
          it != stacking_order.end();
          ++it )
         {
+        if( !(*it)->isShown( true ))
+            continue; // these don't obscure the window
+        if( c->isOnAllDesktops())
+            {
+            if( !(*it)->isOnCurrentDesktop())
+                continue;
+            }
+        else
+            {
+            if( !(*it)->isOnDesktop( c->desktop()))
+                continue;
+            }
         /* the clients all have their mask-regions in local coords
 	   so we have to translate them to a shared coord system
 	   we choose ours */