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# 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
import logging
import telepathy
from gobject import property, SIGNAL_RUN_FIRST, TYPE_PYOBJECT
from sugar.activity.activity import Activity
from sugar.presence.sugartubeconn import SugarTubeConnection
logger = logging.getLogger('cartoon-builder')
INSTANCED = 0
NEW_INSTANCE = 1
RESUME_INSTANCE = 2
class CanvasActivity(Activity):
def new_instance(self):
# stub
pass
def resume_instance(self, filepath):
# stub
pass
def save_instance(self, filepath):
# stub
raise NotImplementedError
def share_instance(self, connection, is_initiator):
# stub
pass
def __init__(self, canvas, handle):
Activity.__init__(self, handle)
self.__state = handle.object_id is None \
and NEW_INSTANCE or RESUME_INSTANCE
self.__resume_filename = None
self.__postponed_share = []
# XXX do it after(possible) read_file() invoking
# have to rely on calling read_file() from map_cb in sugar-toolkit
canvas.connect_after('map', self._map_canvasactivity_cb)
self.set_canvas(canvas)
def __instance(self, cb, *args):
for i in self.__postponed_share:
self.share_instance(i, self._initiating)
self.__postponed_share = []
cb(*args)
def read_file(self, filepath):
if self.__state != INSTANCED:
self.__resume_filename = filepath
self.__state = INSTANCED
else:
self.__instance(self.resume_instance, filepath);
def _map_canvasactivity_cb(self, widget):
if self.__state == NEW_INSTANCE:
self.__instance(self.new_instance)
elif self.__state != INSTANCED:
self.__state = INSTANCED
else:
self.__instance(self.resume_instance, self.__resume_filename);
return False
def write_file(self, filepath):
self.save_instance(filepath)
class SharedActivity(CanvasActivity):
def share_instance(self, connection, is_initiator):
# stub
pass
def __init__(self, canvas, service, *args):
CanvasActivity.__init__(self, canvas, *args)
self.service = service
self.connect('shared', self._shared_cb)
# Owner.props.key
if self._shared_activity:
# We are joining the activity
self.connect('joined', self._joined_cb)
if self.get_shared():
# We've already joined
self._joined_cb()
def _shared_cb(self, activity):
logger.debug('My activity was shared')
self._initiating = True
self._sharing_setup()
logger.debug('This is my activity: making a tube...')
id = self._tubes_chan[telepathy.CHANNEL_TYPE_TUBES].OfferDBusTube(
self.service, {})
def _joined_cb(self, activity):
if not self._shared_activity:
return
logger.debug('Joined an existing shared activity')
self._initiating = False
self._sharing_setup()
logger.debug('This is not my activity: waiting for a tube...')
self._tubes_chan[telepathy.CHANNEL_TYPE_TUBES].ListTubes(
reply_handler=self._list_tubes_reply_cb,
error_handler=self._list_tubes_error_cb)
def _sharing_setup(self):
if self._shared_activity is None:
logger.error('Failed to share or join activity')
return
self._conn = self._shared_activity.telepathy_conn
self._tubes_chan = self._shared_activity.telepathy_tubes_chan
self._text_chan = self._shared_activity.telepathy_text_chan
self._tubes_chan[telepathy.CHANNEL_TYPE_TUBES].connect_to_signal('NewTube', self._new_tube_cb)
def _list_tubes_reply_cb(self, tubes):
for tube_info in tubes:
self._new_tube_cb(*tube_info)
def _list_tubes_error_cb(self, e):
logger.error('ListTubes() failed: %s', e)
def _new_tube_cb(self, id, initiator, type, service, params, state):
logger.debug('New tube: ID=%d initator=%d type=%d service=%s '
'params=%r state=%d', id, initiator, type, service,
params, state)
if (type == telepathy.TUBE_TYPE_DBUS and
service == self.service):
if state == telepathy.TUBE_STATE_LOCAL_PENDING:
self._tubes_chan[telepathy.CHANNEL_TYPE_TUBES].AcceptDBusTube(id)
tube_conn = SugarTubeConnection(self._conn,
self._tubes_chan[telepathy.CHANNEL_TYPE_TUBES],
id, group_iface=self._text_chan[telepathy.CHANNEL_INTERFACE_GROUP])
if self.__state == INSTANCED:
self.share_instance(tube_conn, self._initiating)
else:
self.__postponed_share.append(tube_conn)
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