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# -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# Copyright (C) 2005-2009 Johan Dahlin <johan@gnome.org>
#
# types.py: base types for introspected items.
#
# This library 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 library 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 library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
# USA
from __future__ import absolute_import
import sys
import gobject
from ._gi import \
InterfaceInfo, \
ObjectInfo, \
StructInfo, \
set_object_has_new_constructor, \
register_interface_info
def Function(info):
def function(*args):
return info.invoke(*args)
function.__info__ = info
function.__name__ = info.get_name()
function.__module__ = info.get_namespace()
return function
def Constructor(info):
def constructor(cls, *args):
cls_name = info.get_container().get_name()
if cls.__name__ != cls_name:
raise TypeError, '%s constructor cannot be used to create instances of a subclass' % cls_name
return info.invoke(cls, *args)
constructor.__info__ = info
constructor.__name__ = info.get_name()
constructor.__module__ = info.get_namespace()
return constructor
class MetaClassHelper(object):
def _setup_methods(cls):
for method_info in cls.__info__.get_methods():
name = method_info.get_name()
function = Function(method_info)
if method_info.is_method():
method = function
elif method_info.is_constructor():
continue
else:
method = staticmethod(function)
setattr(cls, name, method)
def _setup_fields(cls):
for field_info in cls.__info__.get_fields():
name = field_info.get_name().replace('-', '_')
setattr(cls, name, property(field_info.get_value, field_info.set_value))
def _setup_constants(cls):
for constant_info in cls.__info__.get_constants():
name = constant_info.get_name()
value = constant_info.get_value()
setattr(cls, name, value)
class GObjectMeta(gobject.GObjectMeta, MetaClassHelper):
def _setup_constructors(cls):
for method_info in cls.__info__.get_methods():
if method_info.is_constructor():
name = method_info.get_name()
constructor = classmethod(Constructor(method_info))
setattr(cls, name, constructor)
def __init__(cls, name, bases, dict_):
super(GObjectMeta, cls).__init__(name, bases, dict_)
# Avoid touching anything else than the base class.
if cls.__info__.get_g_type().pytype is not None:
return
cls._setup_methods()
cls._setup_constants()
if isinstance(cls.__info__, ObjectInfo):
cls._setup_fields()
cls._setup_constructors()
set_object_has_new_constructor(cls.__info__.get_g_type())
elif isinstance(cls.__info__, InterfaceInfo):
register_interface_info(cls.__info__.get_g_type())
class StructMeta(type, MetaClassHelper):
def _setup_constructors(cls):
constructor_infos = []
default_constructor_info = None
for method_info in cls.__info__.get_methods():
if method_info.is_constructor():
name = method_info.get_name()
constructor = classmethod(Function(method_info))
setattr(cls, name, constructor)
constructor_infos.append(method_info)
if name == "new":
default_constructor_info = method_info
if default_constructor_info is None and constructor_infos:
default_constructor_info = constructor_infos[0]
if default_constructor_info is not None:
cls.__new__ = staticmethod(Function(default_constructor_info))
def __init__(cls, name, bases, dict_):
super(StructMeta, cls).__init__(name, bases, dict_)
# Avoid touching anything else than the base class.
g_type = cls.__info__.get_g_type()
if g_type != gobject.TYPE_INVALID and g_type.pytype is not None:
return
cls._setup_fields()
cls._setup_methods()
cls._setup_constructors()
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