Make Journal active at startup. #2159

Also distinguish between "active" in the sense of "the user is actually
using this activity" and "active" in the sense of "the activity would
be active *if* the user switched to Activity view". It's the latter sense,
now called "pending" that the Journal is in at startup. Pending is also
used for the next-up activity when you quit the current active activity.

shell/view/Shell.py

@@ -47,6 +47,7 @@ class Shell(gobject.GObject):
         self._hosts = {}
         self._screen = wnck.screen_get_default()
         self._current_host = None
+        self._pending_host = None
         self._screen_rotation = 0
 
         self._key_handler = KeyHandler(self)
@@ -65,6 +66,8 @@ class Shell(gobject.GObject):
         home_model.connect('activity-removed', self._activity_removed_cb)
         home_model.connect('active-activity-changed',
                            self._active_activity_changed_cb)
+        home_model.connect('pending-activity-changed',
+                           self._pending_activity_changed_cb)
 
         # Unfreeze the display when it's stable
         hw_manager = hardwaremanager.get_manager()
@@ -100,6 +103,12 @@ class Shell(gobject.GObject):
 
         self._current_host = host
 
+    def _pending_activity_changed_cb(self, home_model, home_activity):
+        if home_activity:
+            self._pending_host = self._hosts[home_activity.get_xid()]
+        else:
+            self._pending_host = None
+
     def get_model(self):
         return self._model
 
@@ -156,6 +165,8 @@ class Shell(gobject.GObject):
             return
 
         if level == ShellModel.ZOOM_ACTIVITY:
+            if self._pending_host is not None:
+                self._pending_host.present()
             self._screen.toggle_showing_desktop(False)
         else:
             self._model.set_zoom_level(level)

shell/view/home/activitiesdonut.py

@@ -189,7 +189,7 @@ class ActivitiesDonut(hippo.CanvasBox, hippo.CanvasItem):
         self._model = shell.get_model().get_home()
         self._model.connect('activity-added', self._activity_added_cb)
         self._model.connect('activity-removed', self._activity_removed_cb)
-        self._model.connect('active-activity-changed', self._activity_changed_cb)
+        self._model.connect('pending-activity-changed', self._activity_changed_cb)
 
         self.connect('button-release-event', self._button_release_event_cb)
 
@@ -385,7 +385,7 @@ class ActivitiesDonut(hippo.CanvasBox, hippo.CanvasItem):
         cr.fill()
 
         # Selected Wedge
-        current_activity = self._model.get_current_activity()
+        current_activity = self._model.get_pending_activity()
         if current_activity is not None:
             selected_index = self._model.index(current_activity)    
             [angle_start, angle_end] = self._get_angles(selected_index)