sugar-toolkit-gtk3/sugar/activity/Activity.py

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import os
import logging
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import dbus
import dbus.service
import gtk
import gobject
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from sugar.presence.PresenceService import PresenceService
import sugar.util
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ACTIVITY_SERVICE_NAME = "org.laptop.Activity"
ACTIVITY_SERVICE_PATH = "/org/laptop/Activity"
ACTIVITY_INTERFACE = "org.laptop.Activity"
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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
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tightly control what stuff passes through the dbus python bindings."""
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def start(self, pservice, activity):
self._activity = activity
self._pservice = pservice
@dbus.service.method(ACTIVITY_INTERFACE)
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def share(self):
"""Called by the shell to request the activity to share itself on the network."""
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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"""
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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,
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in_signature="sas", out_signature="")
def execute(self, command, args):
self._activity.execute(command, args)
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class Activity(gtk.Window):
"""Base Activity class that all other Activities derive from."""
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def __init__(self):
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gtk.Window.__init__(self)
self.connect('destroy', self.__destroy_cb)
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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)
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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_default_type(self, default_type):
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"""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):
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"""Get the activity default type."""
return self._default_type
def get_shared(self):
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"""Returns TRUE if the activity is shared on the mesh."""
return self._shared
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def get_id(self):
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"""Get the unique activity identifier."""
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if self._activity_id == None:
self._activity_id = sugar.util.unique_id()
return self._activity_id
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def join(self, activity_ps):
"""Join an activity shared on the network."""
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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')
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def share(self):
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"""Share the activity on the network."""
logging.debug('Share activity %s on the network.' % self.get_id())
properties = { 'title' : self.get_title() }
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self._service = self._pservice.share_activity(self,
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self._default_type, properties)
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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)