"""Support code for implementing D-Bus services via GObjects."""

# 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

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# DEALINGS IN THE SOFTWARE.

import sys

from warnings import warn as _warn

_warn(DeprecationWarning("""\

dbus.gobject_service is deprecated, and is not available under Python 3.

Porting from gobject (PyGObject 2) to gi.repository.GObject (PyGObject 3),

and using dbus.gi_service instead of dbus.gobject_service, is recommended.

"""), DeprecationWarning, stacklevel=2)

if 'gi' in sys.modules:

    # this worked in dbus-python 1.0, so preserve the functionality

    from gi.repository import GObject as gobject

else:

    # this worked in dbus-python < 1.0

    import gobject

import dbus.service

class ExportedGObjectType(gobject.GObject.__class__, dbus.service.InterfaceType):

    """A metaclass which inherits from both GObjectMeta and

    `dbus.service.InterfaceType`. Used as the metaclass for `ExportedGObject`.

    """

    def __init__(cls, name, bases, dct):

        gobject.GObject.__class__.__init__(cls, name, bases, dct)

        dbus.service.InterfaceType.__init__(cls, name, bases, dct)

class ExportedGObject(gobject.GObject, dbus.service.Object):

    """A GObject which is exported on the D-Bus.

    Because GObject and `dbus.service.Object` both have custom metaclasses,

    the naive approach using simple multiple inheritance won't work. This

    class has `ExportedGObjectType` as its metaclass, which is sufficient

    to make it work correctly.

    """

    __metaclass__ = ExportedGObjectType

    def __init__(self, conn=None, object_path=None, **kwargs):

        """Initialize an exported GObject.

        :Parameters:

            `conn` : dbus.connection.Connection

                The D-Bus connection or bus

            `object_path` : str

                The object path at which to register this object.

        :Keywords:

            `bus_name` : dbus.service.BusName

                A bus name to be held on behalf of this object, or None.

            `gobject_properties` : dict

                GObject properties to be set on the constructed object.

                Any unrecognised keyword arguments will also be interpreted

                as GObject properties.

            """

        bus_name = kwargs.pop('bus_name', None)

        gobject_properties = kwargs.pop('gobject_properties', None)

        if gobject_properties is not None:

            kwargs.update(gobject_properties)

        gobject.GObject.__init__(self, **kwargs)

        dbus.service.Object.__init__(self, conn=conn,

                                     object_path=object_path,

                                     bus_name=bus_name)