Track activities while they launch

HomeModel now uses the activity ID to track activities, and creates
the HomeActivity object when the activity is launched, not when
its window appears.

shell/model/homeactivity.py

@@ -14,23 +14,73 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
+import time
+import gobject
+import logging
+
 from sugar.presence import PresenceService
 from sugar.activity import Activity
 from sugar import profile
 
-class HomeActivity:
-    def __init__(self, registry, window):
+class HomeActivity(gobject.GObject):
+    __gsignals__ = {
+        'launch-timeout':          (gobject.SIGNAL_RUN_FIRST,
+                                    gobject.TYPE_NONE, 
+                                   ([])),
+    }
+
+    def __init__(self, bundle, activity_id):
+        gobject.GObject.__init__(self)
+        self._window = None
+        self._xid = None
+        self._service = None
+        self._id = activity_id
+        self._type = bundle.get_service_name()
+        self._icon_name = bundle.get_icon()
+
+        self._launch_time = time.time()
+        self._launched = False
+        self._launch_timeout_id = gobject.timeout_add(10000, self._launch_timeout_cb)
+
+        logging.debug("Activity %s (%s) launching..." % (self._id, self._type))
+
+    def __del__(self):
+        gobject.source_remove(self._launch_timeout_id)
+        self._launch_timeout_id = 0
+
+    def _launch_timeout_cb(self, user_data=None):
+        logging.debug("Activity %s (%s) launch timed out" % (self._id, self._type))
+        self._launch_timeout_id = 0
+        self.emit('launch-timeout')
+        return False
+
+    def set_window(self, window):
+        """An activity is 'launched' once we get its window."""
+        logging.debug("Activity %s (%s) finished launching" % (self._id, self._type))
+        self._launched = True
+        gobject.source_remove(self._launch_timeout_id)
+        self._launch_timeout_id = 0
+
+        if self._window or self._xid:
+            raise RuntimeError("Activity is already launched!")
+        if not window:
+            raise ValueError("window must be valid")
+
         self._window = window
         self._xid = window.get_xid()
-
         self._service = Activity.get_service(window.get_xid())
-        self._id = self._service.get_id()
-        self._type = self._service.get_type()
 
-        info = registry.get_bundle(self._type)
-        self._icon_name = info.get_icon()
+        # verify id and type details
+        act_id = self._service.get_id()
+        if act_id != self._id:
+            raise RuntimeError("Activity's real ID (%s) didn't match expected (%s)." % (act_id, self._id))
+        act_type = self._service.get_type()
+        if act_type != self._type:
+            raise RuntimeError("Activity's real type (%s) didn't match expected (%s)." % (act_type, self._type))
 
     def get_title(self):
+        if not self._launched:
+            raise RuntimeError("Activity is still launching.")
         return self._window.get_name()
 
     def get_icon_name(self):
@@ -47,13 +97,25 @@ class HomeActivity:
         return self._id
 
     def get_xid(self):
+        if not self._launched:
+            raise RuntimeError("Activity is still launching.")
         return self._xid
 
     def get_window(self):
+        if not self._launched:
+            raise RuntimeError("Activity is still launching.")
         return self._window
 
     def get_type(self):
         return self._type
 
     def get_shared(self):
+        if not self._launched:
+            raise RuntimeError("Activity is still launching.")
         return self._service.get_shared()
+
+    def get_launch_time(self):
+        return self._launch_time
+
+    def get_launched(self):
+        return self._launched

shell/model/homemodel.py

@@ -20,10 +20,14 @@ import gobject
 import wnck
 
 from model.homeactivity import HomeActivity
+from sugar.activity import Activity
 
 class HomeModel(gobject.GObject):
 
     __gsignals__ = {
+        'activity-launched':       (gobject.SIGNAL_RUN_FIRST,
+                                    gobject.TYPE_NONE, 
+                                   ([gobject.TYPE_PYOBJECT])),
         'activity-added':          (gobject.SIGNAL_RUN_FIRST,
                                     gobject.TYPE_NONE, 
                                    ([gobject.TYPE_PYOBJECT])),
@@ -68,6 +72,12 @@ class HomeModel(gobject.GObject):
         if window.get_window_type() == wnck.WINDOW_NORMAL:
             self._remove_activity(window.get_xid())
 
+    def _get_activity_by_xid(self, xid):
+        for act in self._activities.values():
+            if act.get_xid() == xid:
+                return act
+        return None
+
     def _active_window_changed_cb(self, screen):
         window = screen.get_active_window()
         if window == None:
@@ -77,8 +87,13 @@ class HomeModel(gobject.GObject):
             return
 
         xid = window.get_xid()
-        if self._activities.has_key(xid):
-            self._current_activity = self._activities[xid]
+        act = self._get_activity_by_xid(window.get_xid())
+        if act:
+            if act.get_launched() == True:
+                self._current_activity = act
+            else:
+                self._current_activity = None
+                logging.error('Actiivty for window %d was not yet launched.' % xid)
         else:
             self._current_activity = None
             logging.error('Model for window %d does not exist.' % xid)
@@ -86,13 +101,57 @@ class HomeModel(gobject.GObject):
         self.emit('active-activity-changed', self._current_activity)
         
     def _add_activity(self, window):
-        activity = HomeActivity(self._bundle_registry, window)
-        self._activities[window.get_xid()] = activity
+        act_service = Activity.get_service(window.get_xid())
+        act_id = act_service.get_id()
+
+        activity = None
+        if self._activities.has_key(act_id):
+            activity = self._activities[act_id]
+        else:
+            # activity got lost, took longer to launch than we allow,
+            # or it was launched by something other than the shell
+            act_type = act_service.get_type()
+            bundle = self._bundle_registry.get_bundle(act_type)
+            if not bundle:
+                raise RuntimeError("No bundle for activity type '%s'." % act_type)
+                return
+            activity = HomeActivity(bundle, act_id)
+            self._activities[act_id] = activity
+
+        activity.set_window(window)
         self.emit('activity-added', activity)
 
+    def _internal_remove_activity(self, activity):
+        self.emit('activity-removed', activity)
+        act_id = activity.get_id()
+        del self._activities[act_id]
+        
     def _remove_activity(self, xid):
-        if self._activities.has_key(xid):
-            self.emit('activity-removed', self._activities[xid])
-            del self._activities[xid]
+        activity = self._get_activity_by_xid(window.get_xid())
+        if activity:
+            self._internal_remove_activity(activity)
         else:
             logging.error('Model for window %d does not exist.' % xid)
+
+    def _activity_launch_timeout_cb(self, activity):
+        act_id = activity.get_id()
+        if not act_id in self._activities.keys():
+            return
+        self._internal_remove_activity(activity)
+
+    def notify_activity_launch(self, activity_id, service_name):
+        bundle = self._bundle_registry.get_bundle(service_name)
+        if not bundle:
+            raise ValueError("Activity service name '%s' was not found in the bundle registry." % service_name)
+        activity = HomeActivity(bundle, activity_id)
+        activity.connect('launch-timeout', self._activity_launch_timeout_cb)
+        self._activities[activity_id] = activity
+        self.emit('activity-launched', activity)
+
+    def notify_activity_launch_failed(self, activity_id):
+        if self._activities.has_key(activity_id):
+            activity = self._activities[activity_id]
+            logging.debug("Activity %s (%s) launch failed" % (activity_id, activity.get_type()))
+            self._internal_remove_activity(activity)
+        else:
+            logging.error('Model for activity id %s does not exist.' % activity_id)

shell/view/Shell.py

@@ -205,13 +205,16 @@ class Shell(gobject.GObject):
                 breg = self._model.get_bundle_registry()
                 bundle = breg.find_by_default_type(bundle_id)
                 if bundle:
-                    serv_name = bundle.get_service_name()
+                    act_type = bundle.get_service_name()
+                    home_model = self._model.get_home()
+                    home_model.notify_activity_launch(activity_id, act_type)
                     try:
-                        activity = ActivityFactory.create(serv_name)
+                        activity = ActivityFactory.create(act_type)
                     except DBusException, e:
-                        logging.error("Couldn't launch activity %s:\n%s" % (serv_name, e))
+                        logging.error("Couldn't launch activity %s:\n%s" % (act_type, e))
+                        home_mode.notify_activity_launch_failed(activity_id)
                     else:
-                        logging.debug("Joining activity type %s id %s" % (serv_name, activity_id))
+                        logging.debug("Joining activity type %s id %s" % (act_type, activity_id))
                         activity.join(activity_ps.object_path())
                 else:
                     logging.error("Couldn't find activity for type %s" % bundle_id)
@@ -255,11 +258,15 @@ class Shell(gobject.GObject):
             logging.error("Couldn't find available activity ID.")
             return None
 
+        home_model = self._model.get_home()
+        home_model.notify_activity_launch(act_id, activity_type)
+
         try:
             logging.debug("Shell.start_activity will start %s:%s" % (activity_type, act_id))
             activity = ActivityFactory.create(activity_type)
         except dbus.DBusException, e:
             logging.debug("Couldn't start activity '%s':\n  %s" % (activity_type, e))
+            home_mode.notify_activity_launch_failed(act_id)
             return None
 
         activity.start(act_id)