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# Copyright (C) 2007 Collabora Ltd. <http://www.collabora.co.uk/>
#
# This program 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 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser 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
# Modified by Philippe Normand.
from dbus.connection import Connection
from dbus import PROPERTIES_IFACE
from telepathy.interfaces import CHANNEL_TYPE_DBUS_TUBE
from coherence import log
class TubeConnection(Connection, log.Loggable):
logCategory = "tube_connection"
def __new__(cls, conn, tube, address, group_iface=None, mainloop=None):
self = super(TubeConnection, cls).__new__(cls, address,
mainloop=mainloop)
self._tube = tube
self.participants = {}
self.bus_name_to_handle = {}
self._mapping_watches = []
if group_iface is None:
method = conn.GetSelfHandle
else:
method = group_iface.GetSelfHandle
method(reply_handler=self._on_get_self_handle_reply,
error_handler=self._on_get_self_handle_error)
return self
def _on_get_self_handle_reply(self, handle):
self.self_handle = handle
tube_channel = self._tube[CHANNEL_TYPE_DBUS_TUBE]
match = tube_channel.connect_to_signal('DBusNamesChanged',
self._on_dbus_names_changed)
self._tube[PROPERTIES_IFACE].Get(CHANNEL_TYPE_DBUS_TUBE, 'DBusNames',
reply_handler=self._on_get_dbus_names_reply,
error_handler=self._on_get_dbus_names_error)
self._dbus_names_changed_match = match
def _on_get_self_handle_error(self, e):
self.warning('GetSelfHandle failed: %s', e)
def close(self):
self._dbus_names_changed_match.remove()
self._on_dbus_names_changed({}, self.participants.keys())
super(TubeConnection, self).close()
def _on_get_dbus_names_reply(self, names):
self._on_dbus_names_changed(names, ())
def _on_get_dbus_names_error(self, e):
self.warning('Get DBusNames property failed: %s', e)
def _on_dbus_names_changed(self, added, removed):
for handle, bus_name in added.items():
if handle == self.self_handle:
# I've just joined - set my unique name
self.set_unique_name(bus_name)
self.participants[handle] = bus_name
self.bus_name_to_handle[bus_name] = handle
# call the callback while the removed people are still in
# participants, so their bus names are available
for callback in self._mapping_watches:
callback(added, removed)
for handle in removed:
bus_name = self.participants.pop(handle, None)
self.bus_name_to_handle.pop(bus_name, None)
def watch_participants(self, callback):
self._mapping_watches.append(callback)
if self.participants:
# GetDBusNames already returned: fake a participant add event
# immediately
added = list(self.participants.iteritems())
callback(added, [])
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