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# Copyright (C) 2006, Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
import os
import logging
import dbus
import dbus.service
import gtk
import gobject
from sugar.presence.PresenceService import PresenceService
from sugar import activity
import sugar.util
ACTIVITY_SERVICE_NAME = "org.laptop.Activity"
ACTIVITY_SERVICE_PATH = "/org/laptop/Activity"
ACTIVITY_INTERFACE = "org.laptop.Activity"
def get_service_name(xid):
return ACTIVITY_SERVICE_NAME + '%d' % xid
def get_object_path(xid):
return ACTIVITY_SERVICE_PATH + "/%s" % xid
class ActivityDbusService(dbus.service.Object):
"""Base dbus service object that each Activity uses to export dbus methods.
The dbus service is separate from the actual Activity object so that we can
tightly control what stuff passes through the dbus python bindings."""
def start(self, pservice, activity):
self._activity = activity
self._pservice = pservice
@dbus.service.method(ACTIVITY_INTERFACE)
def share(self):
"""Called by the shell to request the activity to share itself on the network."""
self._activity.share()
@dbus.service.method(ACTIVITY_INTERFACE)
def join(self, activity_ps_path):
"""Join the activity specified by its presence service path"""
activity_ps = self._pservice.get(activity_ps_path)
return self._activity.join(activity_ps)
@dbus.service.method(ACTIVITY_INTERFACE)
def get_id(self):
"""Get the activity identifier"""
return self._activity.get_id()
@dbus.service.method(ACTIVITY_INTERFACE)
def get_type(self):
"""Get the activity type"""
return self._activity.get_type()
@dbus.service.method(ACTIVITY_INTERFACE)
def get_shared(self):
"""Returns True if the activity is shared on the mesh."""
return self._activity.get_shared()
@dbus.service.method(ACTIVITY_INTERFACE,
in_signature="sas", out_signature="")
def execute(self, command, args):
self._activity.execute(command, args)
class Activity(gtk.Window):
"""Base Activity class that all other Activities derive from."""
def __init__(self):
gtk.Window.__init__(self)
self.connect('destroy', self.__destroy_cb)
self._shared = False
self._activity_id = None
self._default_type = None
self._service = None
self._pservice = PresenceService()
self.present()
group = gtk.Window()
group.realize()
self.window.set_group(group.window)
bus = dbus.SessionBus()
xid = self.window.xid
bus_name = dbus.service.BusName(get_service_name(xid), bus=bus)
self._bus = ActivityDbusService(bus_name, get_object_path(xid))
self._bus.start(self._pservice, self)
def set_type(self, activity_type):
"""Sets the activity type."""
self._activity_type = activity_type
self._default_type = activity.get_default_type(activity_type)
def get_type(self):
"""Gets the activity type."""
return self._activity_type
def get_default_type(self):
return self._default_type
def get_shared(self):
"""Returns TRUE if the activity is shared on the mesh."""
return self._shared
def get_id(self):
"""Get the unique activity identifier."""
if self._activity_id == None:
self._activity_id = sugar.util.unique_id()
return self._activity_id
def join(self, activity_ps):
"""Join an activity shared on the network."""
self._shared = True
self._activity_id = activity_ps.get_id()
# Publish the default service, it's a copy of
# one of those we found on the network.
services = activity_ps.get_services_of_type(self._default_type)
if len(services) > 0:
service = services[0]
addr = service.get_address()
port = service.get_port()
properties = service.get_published_values()
self._service = self._pservice.share_activity(
self, self._default_type, properties, addr, port)
else:
logging.error('Cannot join the activity')
def share(self):
"""Share the activity on the network."""
logging.debug('Share activity %s on the network.' % self.get_id())
self._service = self._pservice.share_activity(self, self._default_type)
self._shared = True
def execute(self, command, args):
"""Execute the given command with args"""
pass
def __destroy_cb(self, window):
if self._bus:
del self._bus
self._bus = None
if self._service:
self._pservice.unregister_service(self._service)
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