# 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 sugar import activity from model.homeactivity import HomeActivity 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])), 'pending-activity-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([gobject.TYPE_PYOBJECT])) } def __init__(self): gobject.GObject.__init__(self) self._activities = [] self._active_activity = None self._pending_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_activities_with_window(self): ret = [] for i in self._activities: if i.get_window() is not None: ret.append(i) return ret def get_previous_activity(self): activities = self._get_activities_with_window() i = activities.index(self._pending_activity) if len(activities) == 0: return None elif i - 1 >= 0: return activities[i - 1] else: return activities[len(activities) - 1] def get_next_activity(self): activities = self._get_activities_with_window() i = activities.index(self._pending_activity) if len(activities) == 0: return None elif i + 1 < len(activities): return activities[i + 1] else: return activities[0] def get_pending_activity(self): """Returns the activity that would be seen in the Activity zoom level In the Home (or Neighborhood or Groups) zoom level, this indicates the activity that would become active if the user switched to the Activity zoom level. (In the Activity zoom level, this just returns the currently-active activity.) Unlike get_active_activity(), this never returns None as long as there is any activity running. """ return self._pending_activity def _set_pending_activity(self, home_activity): if self._pending_activity == home_activity: return self._pending_activity = home_activity self.emit('pending-activity-changed', self._pending_activity) def get_active_activity(self): """Returns the activity that the user is currently working in In the Activity zoom level, this returns the currently-active activity. In the other zoom levels, it returns the activity that was most-recently active in the Activity zoom level, or None if the most-recently-active activity is no longer running. """ return self._active_activity def _set_active_activity(self, home_activity): if self._active_activity == home_activity: return if self._active_activity: service = self._active_activity.get_service() if service: service.SetActive(False, reply_handler=self._set_active_success, error_handler=self._set_active_error) if home_activity: service = home_activity.get_service() if service: service.SetActive(True, reply_handler=self._set_active_success, error_handler=self._set_active_error) self._active_activity = home_activity self.emit('active-activity-changed', self._active_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: home_activity = None activity_id = wm.get_activity_id(window) service_name = wm.get_bundle_id(window) if service_name: registry = activity.get_registry() activity_info = registry.get_activity(service_name) else: activity_info = None if activity_id: home_activity = self._get_activity_by_id(activity_id) if not home_activity: home_activity = HomeActivity(activity_info, activity_id) self._add_activity(home_activity) home_activity.set_window(window) home_activity.props.launching = False self.emit('activity-started', home_activity) if self._pending_activity is None: self._set_pending_activity(home_activity) def _window_closed_cb(self, screen, window): if window.get_window_type() == wnck.WINDOW_NORMAL: self._remove_activity_by_xid(window.get_xid()) def _get_activity_by_xid(self, xid): for home_activity in self._activities: if home_activity.get_xid() == xid: return home_activity return None def _get_activity_by_id(self, activity_id): for home_activity in self._activities: if home_activity.get_activity_id() == activity_id: return home_activity return None def _set_active_success(self): pass def _set_active_error(self, err): logging.error("set_active() failed: %s" % err) def _active_window_changed_cb(self, screen, previous_window=None): window = screen.get_active_window() if window is None: return if window.get_window_type() != wnck.WINDOW_DIALOG: while window.get_transient() is not None: window = window.get_transient() activity = self._get_activity_by_xid(window.get_xid()) if activity is not None: self._set_pending_activity(activity) self._set_active_activity(activity) def _add_activity(self, home_activity): self._activities.append(home_activity) self.emit('activity-added', home_activity) def _remove_activity(self, home_activity): if home_activity == self._active_activity: self._set_active_activity(None) if home_activity == self._pending_activity: # Figure out the new _pending_activity windows = wnck.screen_get_default().get_windows_stacked() windows.reverse() for window in windows: new_activity = self._get_activity_by_xid(window.get_xid()) if new_activity is not None: self._set_pending_activity(new_activity) break else: logging.error('No activities are running') self._set_pending_activity(None) self.emit('activity-removed', home_activity) self._activities.remove(home_activity) def _remove_activity_by_xid(self, xid): home_activity = self._get_activity_by_xid(xid) if home_activity: self._remove_activity(home_activity) else: logging.error('Model for window %d does not exist.' % xid) def notify_activity_launch(self, activity_id, service_name): registry = activity.get_registry() activity_info = registry.get_activity(service_name) if not activity_info: raise ValueError("Activity service name '%s' was not found in the bundle registry." % service_name) home_activity = HomeActivity(activity_info, activity_id) home_activity.props.launching = True self._add_activity(home_activity) # FIXME: better learn about finishing processes by receiving a signal. # Now just check whether an activity has a window after ~90sec gobject.timeout_add(90000, self._check_activity_launched, activity_id) def notify_activity_launch_failed(self, activity_id): home_activity = self._get_activity_by_id(activity_id) if home_activity: logging.debug("Activity %s (%s) launch failed" % (activity_id, home_activity.get_type())) self._remove_activity(home_activity) else: logging.error('Model for activity id %s does not exist.' % activity_id) def _check_activity_launched(self, activity_id): home_activity = self._get_activity_by_id(activity_id) if home_activity and home_activity.props.launching: logging.debug('Activity %s still launching, assuming it failed...', activity_id) self.notify_activity_launch_failed(activity_id) return False