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import os
import dbus
import dbus.service
import gtk
import gobject
from sugar.presence.PresenceService import PresenceService
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_default_type(self):
"""Get the activity default type"""
return self._activity.get_default_type()
@dbus.service.method(ACTIVITY_INTERFACE)
def set_default_type(self, default_type):
"""Set the activity default type"""
self._activity.set_default_type(default_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._shared = False
self._activity_id = None
self._default_type = 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 __del__(self):
if self._bus:
del self._bus
self._bus = None
def set_default_type(self, default_type):
"""Set the activity default type.
It's the type of the main network service which tracks presence
and provides info about the activity, for example the title."""
self._default_type = default_type
def get_default_type(self):
"""Get the activity default type."""
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 = { 'title' : service.get_published_value('title') }
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."""
properties = { 'title' : self.get_title() }
self._service = self._pservice.share_activity(self,
self._default_type, properties)
self._shared = True
def execute(self, command, args):
"""Execute the given command with args"""
pass
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