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# Copyright (C) 2006-2007 Red Hat, Inc.
#
# 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
"""D-bus service providing access to the shell's functionality"""
import dbus
import os
_DBUS_SERVICE = "org.laptop.Shell"
_DBUS_SHELL_IFACE = "org.laptop.Shell"
_DBUS_OWNER_IFACE = "org.laptop.Shell.Owner"
_DBUS_PATH = "/org/laptop/Shell"
_DBUS_RAINBOW_IFACE = "org.laptop.security.Rainbow"
class ShellService(dbus.service.Object):
"""Provides d-bus service to script the shell's operations
Uses a shell_model object to observe events such as changes to:
* nickname
* colour
* icon
* currently active activity
and pass the event off to the methods in the dbus signature.
Key method here at the moment is add_bundle, which is used to
do a run-time registration of a bundle using it's application path.
XXX At the moment the d-bus service methods do not appear to do
anything other than add_bundle
"""
_rainbow = None
def __init__(self, shell):
self._shell = shell
self._shell_model = shell.get_model()
self._owner = self._shell_model.get_owner()
self._owner.connect('nick-changed', self._owner_nick_changed_cb)
self._owner.connect('icon-changed', self._owner_icon_changed_cb)
self._owner.connect('color-changed', self._owner_color_changed_cb)
self._home_model = self._shell_model.get_home()
self._home_model.connect('active-activity-changed',
self._cur_activity_changed_cb)
bus = dbus.SessionBus()
bus_name = dbus.service.BusName(_DBUS_SERVICE, bus=bus)
dbus.service.Object.__init__(self, bus_name, _DBUS_PATH)
@dbus.service.method(_DBUS_SHELL_IFACE,
in_signature="s", out_signature="b")
def ActivateActivity(self, activity_id):
host = self._shell.get_activity(activity_id)
if host:
host.present()
return True
return False
@dbus.service.method(_DBUS_SHELL_IFACE,
in_signature="ss", out_signature="")
def NotifyLaunch(self, bundle_id, activity_id):
self._shell.notify_launch(bundle_id, activity_id)
@dbus.service.method(_DBUS_SHELL_IFACE,
in_signature="s", out_signature="")
def NotifyLaunchFailure(self, activity_id):
self._shell.notify_launch_failure(activity_id)
@dbus.service.signal(_DBUS_OWNER_IFACE, signature="s")
def ColorChanged(self, color):
pass
def _owner_color_changed_cb(self, new_color):
self.ColorChanged(new_color.to_string())
@dbus.service.signal(_DBUS_OWNER_IFACE, signature="s")
def NickChanged(self, nick):
pass
def _owner_nick_changed_cb(self, new_nick):
self.NickChanged(new_nick)
@dbus.service.signal(_DBUS_OWNER_IFACE, signature="ay")
def IconChanged(self, icon_data):
pass
def _owner_icon_changed_cb(self, new_icon):
self.IconChanged(dbus.ByteArray(new_icon))
def _get_rainbow_service(self):
"""Lazily initializes an interface to the Rainbow security daemon."""
if self._rainbow is None:
system_bus = dbus.SystemBus()
object = system_bus.get_object(_DBUS_RAINBOW_IFACE, '/',
follow_name_owner_changes=True)
self._rainbow = dbus.Interface(object,
dbus_interface=_DBUS_RAINBOW_IFACE)
return self._rainbow
@dbus.service.signal(_DBUS_OWNER_IFACE, signature="s")
def CurrentActivityChanged(self, activity_id):
if os.path.exists('/etc/olpc-security'):
self._get_rainbow_service().ChangeActivity(
activity_id,
dbus_interface=_DBUS_RAINBOW_IFACE)
def _cur_activity_changed_cb(self, owner, new_activity):
new_id = ""
if new_activity:
new_id = new_activity.get_activity_id()
if new_id:
self.CurrentActivityChanged(new_id)
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