[rhythmbox] context: use an idle handler for track changes (bug #602140)

[Jonathan Matthew <jmatthew src gnome org>]

commit e93fd2d7afe1411a5a60052a4adecd6a56db5b7b
Author: Jonathan Matthew <jonathan d14n org>
Date:   Fri Nov 27 07:14:51 2009 +1000

    context: use an idle handler for track changes (bug #602140)
    
    The playing-song-changed signal is sometimes emitted on a streaming
    thread.  Calling into webkit on non-main threads causes it to crash
    pretty reliably, so we need to use an idle handler to process it on the
    main thread.

 plugins/context/context/ContextView.py |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/plugins/context/context/ContextView.py b/plugins/context/context/ContextView.py
index 7e2c0d6..e204fc4 100644
--- a/plugins/context/context/ContextView.py
+++ b/plugins/context/context/ContextView.py
@@ -174,6 +174,14 @@ class ContextView (gobject.GObject):
                 self.top_five_list[(i,)] = ("%d. " % (i+1), track)
 
     def playing_changed_cb (self, playing, user_data):
+        # this sometimes happens on a streaming thread, so we need to
+        # move it to the main thread
+        gobject.idle_add (self.playing_changed_idle_cb)
+
+    def playing_changed_idle_cb (self):
+        if self.sp is None:
+            return
+
         playing_entry = self.sp.get_playing_entry ()
         if playing_entry is None:
             return