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# Copyright (C) 2006-2007 Owen Williams.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import logging
import gobject
import wnck
import dbus
from sugar import wm
from model.homeactivity import HomeActivity
from model import bundleregistry
class HomeModel(gobject.GObject):
"""Model of the "Home" view (activity management)
The HomeModel is basically the point of registration
for all running activities within Sugar. It traps
events that tell the system there is a new activity
being created (generated by the activity factories),
or removed, as well as those which tell us that the
currently focussed activity has changed.
The HomeModel tracks a set of HomeActivity instances,
which are tracking the window to activity mappings
the activity factories have set up.
"""
__gsignals__ = {
'activity-added': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'activity-started': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'activity-removed': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'active-activity-changed': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT]))
}
def __init__(self):
gobject.GObject.__init__(self)
self._activities = []
self._bundle_registry = bundleregistry.get_registry()
self._current_activity = None
screen = wnck.screen_get_default()
screen.connect('window-opened', self._window_opened_cb)
screen.connect('window-closed', self._window_closed_cb)
screen.connect('active-window-changed',
self._active_window_changed_cb)
def get_current_activity(self):
return self._current_activity
def __iter__(self):
return iter(self._activities)
def __len__(self):
return len(self._activities)
def __getitem__(self, i):
return self._activities[i]
def index(self, obj):
return self._activities.index(obj)
def _window_opened_cb(self, screen, window):
if window.get_window_type() == wnck.WINDOW_NORMAL:
activity = None
activity_id = wm.get_activity_id(window)
bundle_id = wm.get_bundle_id(window)
if bundle_id:
bundle = self._bundle_registry.get_bundle(bundle_id)
else:
bundle = None
if activity_id:
activity = self._get_activity_by_id(activity_id)
if not activity:
activity = HomeActivity(bundle, activity_id)
self._add_activity(activity)
activity.set_window(window)
activity.props.launching = False
self.emit('activity-started', activity)
def _window_closed_cb(self, screen, window):
if window.get_window_type() == wnck.WINDOW_NORMAL:
self._remove_activity_by_xid(window.get_xid())
if not self._activities:
self.emit('active-activity-changed', None)
self._notify_activity_activation(self._current_activity, None)
def _get_activity_by_xid(self, xid):
for activity in self._activities:
if activity.get_xid() == xid:
return activity
return None
def _get_activity_by_id(self, activity_id):
for activity in self._activities:
if activity.get_activity_id() == activity_id:
return activity
return None
def _notify_activity_activation(self, old_activity, new_activity):
if old_activity == new_activity:
return
if old_activity:
service = old_activity.get_service()
if service:
service.set_active(False)
if new_activity:
service = new_activity.get_service()
if service:
service.set_active(True)
def _active_window_changed_cb(self, screen):
window = screen.get_active_window()
if window == None:
self.emit('active-activity-changed', None)
self._notify_activity_activation(self._current_activity, None)
return
if window.get_window_type() != wnck.WINDOW_NORMAL:
return
xid = window.get_xid()
act = self._get_activity_by_xid(window.get_xid())
if act:
self._notify_activity_activation(self._current_activity, act)
self._current_activity = act
else:
self._notify_activity_activation(self._current_activity, None)
self._current_activity = None
logging.error('Model for window %d does not exist.' % xid)
self.emit('active-activity-changed', self._current_activity)
def _add_activity(self, activity):
self._activities.append(activity)
self.emit('activity-added', activity)
def _remove_activity(self, activity):
if activity == self._current_activity:
self._current_activity = None
self.emit('activity-removed', activity)
self._activities.remove(activity)
def _remove_activity_by_xid(self, xid):
activity = self._get_activity_by_xid(xid)
if activity:
self._remove_activity(activity)
else:
logging.error('Model for window %d does not exist.' % xid)
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.props.launching = True
self._add_activity(activity)
def notify_activity_launch_failed(self, activity_id):
activity = self._get_activity_by_id(activity_id)
if activity:
logging.debug("Activity %s (%s) launch failed" % (activity_id, activity.get_type()))
self._remove_activity(activity)
else:
logging.error('Model for activity id %s does not exist.' % activity_id)
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