[banshee] Commit patch from Ubuntu that only adds notification area actions if supported

[Gabriel Burt <gburt src gnome org>]

commit b1ccfb3f28155270d3d4ea0f8fce88acd192b8b4
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Thu May 14 12:08:04 2009 -0500

    Commit patch from Ubuntu that only adds notification area actions if supported
---
 .../NotificationAreaService.cs                     |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/Extensions/Banshee.NotificationArea/Banshee.NotificationArea/NotificationAreaService.cs b/src/Extensions/Banshee.NotificationArea/Banshee.NotificationArea/NotificationAreaService.cs
index 447acc0..95431ae 100644
--- a/src/Extensions/Banshee.NotificationArea/Banshee.NotificationArea/NotificationAreaService.cs
+++ b/src/Extensions/Banshee.NotificationArea/Banshee.NotificationArea/NotificationAreaService.cs
@@ -59,7 +59,8 @@ namespace Banshee.NotificationArea
         private RatingMenuItem rating_menu_item;
         private BansheeActionGroup actions;
         private uint ui_manager_id;
-        
+
+        private bool? actions_supported;
         private bool show_notifications;
         private string notify_last_title;
         private string notify_last_artist;
@@ -200,6 +201,17 @@ namespace Banshee.NotificationArea
             
             disposed = true;
         }
+
+        private bool ActionsSupported {
+            get {
+                if (!actions_supported.HasValue) {
+                    actions_supported = Notifications.Global.Capabilities != null &&
+                        Array.IndexOf (Notifications.Global.Capabilities, "actions") > -1;
+                }
+
+                return actions_supported.Value;
+            }
+        }
         
         private bool BuildNotificationArea () 
         {
@@ -405,7 +417,7 @@ namespace Banshee.NotificationArea
                     message, image, notif_area.Widget);
                 nf.Urgency = Urgency.Low;
                 nf.Timeout = 4500;
-                if (!current_track.IsLive && interface_action_service.PlaybackActions["NextAction"].Sensitive) {
+                if (!current_track.IsLive && ActionsSupported && interface_action_service.PlaybackActions["NextAction"].Sensitive) {
                     nf.AddAction ("skip-song", Catalog.GetString("Skip this item"), OnSongSkipped);
                 }
                 nf.Show ();