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  	   ˆÃÇ0ÂÅ  :   ˆl–ßi~”ËmJi@;p"¸ËÊbÑ¿È„¯‰ßa–Ým_J¥2ÛR‚ œP,Üm«˜´oÇ ?÷     # Copyright (C) 2007 Collabora Ltd. <http://www.collabora.co.uk/>
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use, copy,
# modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.

__all__ = ('BusConnection',)
__docformat__ = 'reStructuredText'

import logging
import weakref

from _dbus_bindings import (
    BUS_DAEMON_IFACE, BUS_DAEMON_NAME, BUS_DAEMON_PATH, BUS_SESSION,
    BUS_STARTER, BUS_SYSTEM, DBUS_START_REPLY_ALREADY_RUNNING,
    DBUS_START_REPLY_SUCCESS, NAME_FLAG_ALLOW_REPLACEMENT,
    NAME_FLAG_DO_NOT_QUEUE, NAME_FLAG_REPLACE_EXISTING,
    RELEASE_NAME_REPLY_NON_EXISTENT, RELEASE_NAME_REPLY_NOT_OWNER,
    RELEASE_NAME_REPLY_RELEASED, REQUEST_NAME_REPLY_ALREADY_OWNER,
    REQUEST_NAME_REPLY_EXISTS, REQUEST_NAME_REPLY_IN_QUEUE,
    REQUEST_NAME_REPLY_PRIMARY_OWNER, validate_bus_name, validate_error_name,
    validate_interface_name, validate_member_name, validate_object_path)
from dbus.connection import Connection
from dbus.exceptions import DBusException
from dbus.lowlevel import HANDLER_RESULT_NOT_YET_HANDLED
from dbus._compat import is_py2


_NAME_OWNER_CHANGE_MATCH = ("type='signal',sender='%s',"
                            "interface='%s',member='NameOwnerChanged',"
                            "path='%s',arg0='%%s'"
                            % (BUS_DAEMON_NAME, BUS_DAEMON_IFACE,
                               BUS_DAEMON_PATH))
"""(_NAME_OWNER_CHANGE_MATCH % sender) matches relevant NameOwnerChange
messages"""

_NAME_HAS_NO_OWNER = 'org.freedesktop.DBus.Error.NameHasNoOwner'

_logger = logging.getLogger('dbus.bus')


class NameOwnerWatch(object):
    __slots__ = ('_match', '_pending_call')

    def __init__(self, bus_conn, bus_name, callback):
        validate_bus_name(bus_name)

        def signal_cb(owned, old_owner, new_owner):
            callback(new_owner)

        def error_cb(e):
            if e.get_dbus_name() == _NAME_HAS_NO_OWNER:
                callback('')
            else:
                logging.basicConfig()
                _logger.debug('GetNameOwner(%s) failed:', bus_name,
                              exc_info=(e.__class__, e, None))

        self._match = bus_conn.add_signal_receiver(signal_cb,
                                                   'NameOwnerChanged',
                                                   BUS_DAEMON_IFACE,
                                                   BUS_DAEMON_NAME,
                                                   BUS_DAEMON_PATH,
                                                   arg0=bus_name)
        keywords = {}
        if is_py2: