[kupfer] windows: Hide current workspace in Move To... action

[Ulrik Sverdrup <usverdrup src gnome org>]

commit 143b4c57ff8f82a14f6b0dd35cce4fc86c4ca5a5
Author: Ulrik Sverdrup <ulrik sverdrup gmail com>
Date:   Fri Jan 8 15:59:25 2010 +0100

    windows: Hide current workspace in Move To... action

 kupfer/plugin/windows.py |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/kupfer/plugin/windows.py b/kupfer/plugin/windows.py
index e7eed20..cfbe9b5 100644
--- a/kupfer/plugin/windows.py
+++ b/kupfer/plugin/windows.py
@@ -116,6 +116,10 @@ class WindowMoveToWorkspace (Action):
 	def object_source(self, for_item=None):
 		return WorkspacesSource()
 
+	def valid_object(self, iobj, for_item):
+		window = for_item.object
+		return not window.is_on_workspace(iobj.object)
+
 	def get_icon_name(self):
 		return "forward"