# 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)