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# This should eventually land in telepathy-python, so has the same license:
# Copyright (C) 2008 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# FIXME: this sould go upstream, in telepathy-python
import logging
import dbus
import dbus.mainloop.glib
import gobject
from telepathy.client import Connection
from telepathy.interfaces import CONN_INTERFACE
from telepathy.constants import CONNECTION_STATUS_CONNECTED, \
CONNECTION_STATUS_DISCONNECTED
_instance = None
class ConnectionWatcher(gobject.GObject):
__gsignals__ = {
'connection-added': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'connection-removed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
}
def __init__(self, bus=None):
gobject.GObject.__init__(self)
if bus is None:
self.bus = dbus.Bus()
else:
self.bus = bus
# D-Bus path -> Connection
self._connections = {}
self.bus.add_signal_receiver(self._status_changed_cb,
dbus_interface=CONN_INTERFACE, signal_name='StatusChanged',
path_keyword='path')
for conn in Connection.get_connections(bus):
conn.call_when_ready(self._conn_ready_cb)
def _status_changed_cb(self, *args, **kwargs):
path = kwargs['path']
if not path.startswith('/org/freedesktop/Telepathy/Connection/'):
return
status, reason_ = args
service_name = path.replace('/', '.')[1:]
if status == CONNECTION_STATUS_CONNECTED:
self._add_connection(service_name, path)
elif status == CONNECTION_STATUS_DISCONNECTED:
self._remove_connection(service_name, path)
def _conn_ready_cb(self, conn):
if conn.object_path in self._connections:
return
self._connections[conn.object_path] = conn
self.emit('connection-added', conn)
def _add_connection(self, service_name, path):
if path in self._connections:
return
try:
Connection(service_name, path, ready_handler=self._conn_ready_cb)
except dbus.exceptions.DBusException:
logging.debug('%s is propably already gone.', service_name)
def _remove_connection(self, service_name, path):
conn = self._connections.pop(path, None)
if conn is None:
return
self.emit('connection-removed', conn)
def get_connections(self):
return self._connections.values()
def get_instance():
global _instance
if _instance is None:
_instance = ConnectionWatcher()
return _instance
if __name__ == '__main__':
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
def connection_added_cb(conn_watcher, conn):
print 'new connection', conn.service_name
def connection_removed_cb(conn_watcher, conn):
print 'removed connection', conn.service_name
watcher = ConnectionWatcher()
watcher.connect('connection-added', connection_added_cb)
watcher.connect('connection-removed', connection_removed_cb)
loop = gobject.MainLoop()
loop.run()
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