[mutter] Add API to get the monitor of a window

[Alexander Larsson <alexl src gnome org>]

commit d6f0d2c64ce7342e770a071a3ca8b24df2c140e7
Author: Alexander Larsson <alexl redhat com>
Date:   Mon Feb 28 15:21:35 2011 +0100

    Add API to get the monitor of a window
    
    https://bugzilla.gnome.org/show_bug.cgi?id=609258

 src/core/window.c |   14 ++++++++++++++
 src/meta/window.h |    1 +
 2 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 1bf4799..5c845c2 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -3995,6 +3995,20 @@ move_attached_dialog (MetaWindow *window,
   return FALSE;
 }
 
+/**
+ * meta_window_get_monitor:
+ * @window: a #MetaWindow
+ *
+ * Gets index of the monitor that this window is on.
+ *
+ * Return Value: The index of the monitor in the screens monitor list
+ */
+int
+meta_window_get_monitor (MetaWindow *window)
+{
+  return window->monitor->number;
+}
+
 void
 meta_window_update_monitor (MetaWindow *window)
 {
diff --git a/src/meta/window.h b/src/meta/window.h
index 467434f..060cc1e 100644
--- a/src/meta/window.h
+++ b/src/meta/window.h
@@ -81,6 +81,7 @@ Window meta_window_get_xwindow (MetaWindow *window);
 MetaWindowType meta_window_get_window_type (MetaWindow *window);
 Atom meta_window_get_window_type_atom (MetaWindow *window);
 MetaWorkspace *meta_window_get_workspace (MetaWindow *window);
+int      meta_window_get_monitor (MetaWindow *window);
 gboolean meta_window_is_on_all_workspaces (MetaWindow *window);
 gboolean meta_window_is_hidden (MetaWindow *window);
 void     meta_window_activate  (MetaWindow *window,guint32 current_time);