Do not open multiple copies of the same activity

shell/ActivityHost.py

@@ -7,17 +7,17 @@ from PeopleWindow import PeopleWindow
 class ActivityHost:
 	def __init__(self, shell, window):
 		self._shell = shell
-
-		xid = window.get_xid()
+		self._window = window
+		self._xid = window.get_xid()
 
 		bus = dbus.SessionBus()
-		proxy_obj = bus.get_object(Activity.get_service_name(xid),
-								   Activity.get_object_path(xid))
+		proxy_obj = bus.get_object(Activity.get_service_name(self._xid),
+								   Activity.get_object_path(self._xid))
 
 		self._activity = dbus.Interface(proxy_obj, Activity.ACTIVITY_INTERFACE)
 		self._id = self._activity.get_id()
 		self._default_type = self._activity.get_default_type()
-		self._window = gtk.gdk.window_foreign_new(window.get_xid())
+		self._gdk_window = gtk.gdk.window_foreign_new(self._xid)
 		self._people_window = PeopleWindow(shell, self)
 
 	def get_id(self):
@@ -36,6 +36,9 @@ class ActivityHost:
 	def show_people(self):
 		self.show_dialog(self._people_window)
 
+	def present(self):
+		self._window.activate(gtk.get_current_event_time())
+
 	def show_dialog(self, dialog):
 		dialog.show()
-		dialog.window.set_transient_for(self._window)
+		dialog.window.set_transient_for(self._gdk_window)

shell/Shell.py

@@ -90,7 +90,7 @@ class Shell(gobject.GObject):
 			del self._hosts[xid]
 
 	def get_activity(self, activity_id):
-		for host in self._hosts:
+		for host in self._hosts.values():
 			if host.get_id() == activity_id:
 				return host
 		return None
@@ -128,15 +128,20 @@ class Shell(gobject.GObject):
 		info = self._registry.get_activity(service.get_type())
 		
 		activity_id = service.get_activity_id()
-		pservice = PresenceService()
-		activity_ps = pservice.get_activity(activity_id)
 
-		if activity_ps:
-			activity = ActivityFactory.create(info.get_id())
-			activity.set_default_type(service.get_type())
-			activity.join(activity_ps.object_path())
+		activity = self.get_activity(activity_id)
+		if activity:
+			activity.present()
 		else:
-			logging.error('Cannot start activity.')
+			pservice = PresenceService()
+			activity_ps = pservice.get_activity(activity_id)
+
+			if activity_ps:
+				activity = ActivityFactory.create(info.get_id())
+				activity.set_default_type(service.get_type())
+				activity.join(activity_ps.object_path())
+			else:
+				logging.error('Cannot start activity.')
 
 	def start_activity(self, activity_name):
 		activity = ActivityFactory.create(activity_name)

shell/session/Emulator.py

@@ -14,7 +14,6 @@ def get_display_number():
 		s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 		try:
 			s.connect(('127.0.0.1', 6000 + display_number))
-			logging.info('Display %d is already in use. Trying next.' % (display_number))
 			s.close()
 
 			display_number += 1