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"""Support code for implementing D-Bus services via PyGI."""
# 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__ = ['ExportedGObject']
from gi.repository import GObject
import dbus.service
# The odd syntax used here is required so that the code is compatible with
# both Python 2 and Python 3. It essentially creates a new class called
# ExportedGObject with a metaclass of ExportGObjectType and an __init__()
# function.
#
# 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.
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)
def ExportedGObject__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)
ExportedGObject__doc__ = 'A GObject which is exported on the D-Bus.'
ExportedGObject = ExportedGObjectType(
'ExportedGObject',
(GObject.GObject, dbus.service.Object),
{'__init__': ExportedGObject__init__,
'__doc__': ExportedGObject__doc__,
})