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