use activity_id in service name

- construct service name from activity id instead of X window id
- cleanup unused declarations in activityfactory.py
- remove obsolete _dbus_name_owner_changed_cb()
- see http://dev.laptop.org/ticket/1767
- cleared by marcopg

shell/model/homemodel.py

@@ -71,12 +71,6 @@ class HomeModel(gobject.GObject):
         screen.connect('active-window-changed',
                        self._active_window_changed_cb)
 
-        bus = dbus.SessionBus()
-        bus.add_signal_receiver(self._dbus_name_owner_changed_cb,
-                                'NameOwnerChanged', 
-                                'org.freedesktop.DBus', 
-                                'org.freedesktop.DBus')
-
     def get_current_activity(self):
         return self._current_activity
 
@@ -111,7 +105,7 @@ class HomeModel(gobject.GObject):
                 activity = HomeActivity(bundle, activity_id)
                 self._add_activity(activity)
 
-            service = self._get_activity_service(window.get_xid())
+            service = self._get_activity_service(activity_id)
             activity.set_service(service)
             activity.set_window(window)
 
@@ -125,19 +119,6 @@ class HomeModel(gobject.GObject):
             self.emit('active-activity-changed', None)
             self._notify_activity_activation(self._current_activity, None)
 
-    def _dbus_name_owner_changed_cb(self, name, old, new):
-        """Detect new activity instances on the DBus"""
-        if name.startswith(_SERVICE_NAME) and new and not old:
-            try:
-                xid = int(name[len(_SERVICE_NAME):])
-                activity = self._get_activity_by_xid(xid)
-                if activity and not activity.get_service():
-                    service = self._get_activity_service(xid)
-                    activity.set_service(service)
-            except ValueError:
-                logging.error('Invalid activity service name, '
-                              'cannot extract the xid')
-
     def _get_activity_by_xid(self, xid):
         for activity in self._activities:
             if activity.get_xid() == xid:
@@ -185,12 +166,12 @@ class HomeModel(gobject.GObject):
 
         self.emit('active-activity-changed', self._current_activity)
 
-    def _get_activity_service(self, xid):
+    def _get_activity_service(self, activity_id):
         bus = dbus.SessionBus()
         try:
             service = dbus.Interface(
-                    bus.get_object(_SERVICE_NAME + '%d' % xid,
-                                   _SERVICE_PATH + "/%s" % xid),
+                    bus.get_object(_SERVICE_NAME + activity_id,
+                                   _SERVICE_PATH + "/" + activity_id),
                                    _SERVICE_INTERFACE)
         except dbus.DBusException:
             service = None

sugar/activity/activityfactory.py

@@ -26,10 +26,6 @@ from sugar.presence import presenceservice
 from sugar.activity.activityhandle import ActivityHandle
 from sugar import util
 
-_ACTIVITY_SERVICE_NAME = "org.laptop.Activity"
-_ACTIVITY_SERVICE_PATH = "/org/laptop/Activity"
-_ACTIVITY_INTERFACE = "org.laptop.Activity"
-
 _ACTIVITY_FACTORY_INTERFACE = "org.laptop.ActivityFactory"
 
 def create_activity_id():

sugar/activity/activityservice.py

@@ -33,24 +33,21 @@ class ActivityService(dbus.service.Object):
     def __init__(self, activity):
         """Initialise the service for the given activity
         
-        activity -- sugar.activity.activity.Activity instance,
-            must have already bound it's window (i.e. it must 
-            have already initialised to the point of having
-            the X window available).
+        activity -- sugar.activity.activity.Activity instance
         
-        Creates dbus services that use the xid of the activity's
-        root window as discriminants among all active services 
+        Creates dbus services that use the instance's activity_id
+        as discriminants among all active services 
         of this type.  That is, the services are all available 
-        as names/paths derived from the xid for the window.
+        as names/paths derived from the instance's activity_id.
         
         The various methods exposed on dbus are just forwarded
         to the client Activity object's equally-named methods.
         """
         activity.realize()
 
-        xid = activity.window.xid
-        service_name = _ACTIVITY_SERVICE_NAME + '%d' % xid 
-        object_path = _ACTIVITY_SERVICE_PATH + "/%s" % xid
+        activity_id = activity.get_id()
+        service_name = _ACTIVITY_SERVICE_NAME + activity_id
+        object_path  = _ACTIVITY_SERVICE_PATH + "/" + activity_id
 
         bus = dbus.SessionBus()
         bus_name = dbus.service.BusName(service_name, bus=bus)