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  #   ˆl–ßi~”TÒ~êu@ŠãM\*bÑ¿Á„Î¶À¿ ?÷     # -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# Copyright (C) 2011-2012 Johan Dahlin <johan@gnome.org>
#
# 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

"""
PyGTK compatibility layer.

This modules goes a little bit longer to maintain PyGTK compatibility than
the normal overrides system.

It is recommended to not depend on this layer, but only use it as an
intermediate step when porting your application to PyGI.

Compatibility might never be 100%, but the aim is to make it possible to run
a well behaved PyGTK application mostly unmodified on top of PyGI.

"""

import sys
import warnings

try:
    # Python 3
    from collections import UserList
    UserList  # pyflakes
    with warnings.catch_warnings():
        warnings.simplefilter('ignore')
        from imp import reload
except ImportError:
    # Python 2 ships that in a different module
    from UserList import UserList
    UserList  # pyflakes

import gi
from gi.repository import GObject


def _install_enums(module, dest=None, strip=''):
    if dest is None:
        dest = module
    modname = dest.__name__.rsplit('.', 1)[1].upper()
    for attr in dir(module):
        try:
            obj = getattr(module, attr, None)
        except:
            continue
        try:
            if issubclass(obj, GObject.GEnum):
                for value, enum in obj.__enum_values__.items():
                    name = enum.value_name
                    name = name.replace(modname + '_', '')
                    if strip and name.startswith(strip):
                        name = name[len(strip):]
                    setattr(dest, name, enum)
        except TypeError:
            continue
        try:
            if issubclass(obj, GObject.GFlags):
                for value, flag in obj.__flags_values__.items():
                    try:
                        name = flag.value_names[-1].replace(modname + '_', '')
                    except IndexError:
                        # FIXME: this happens for some large flags which do not
                        # fit into a long on 32 bit systems
                        continue
                    setattr(dest, name, flag)
        except TypeError:
            continue


def enable():
    # gobject
    from gi.repository import GLib
    sys.modules['glib'] = GLib

    # gobject
    from gi.repository import GObject
    sys.modules['gobject'] = GObject
    from gi import _propertyhelper
    sys.modules['gobject.propertyhelper'] = _propertyhelper

    # gio
    from gi.repository import Gio
    sys.modules['gio'] = Gio

_unset = object()


def enable_gtk(version='3.0'):
    # set the default encoding like PyGTK
    reload(sys)
    if sys.version_info < (3, 0):
        sys.setdefaultencoding('utf-8')

    # atk
    gi.require_version('Atk', '1.0')
    from gi.repository import Atk
    sys.modules['atk'] = Atk
    _install_enums(Atk)

    # pango
    gi.require_version('Pango', '1.0')
    from gi.repository import Pango
    sys.modules['pango'] = Pango
    _install_enums(Pango)

    # pangocairo
    gi.require_version('PangoCairo', '1.0')
    from gi.repository import PangoCairo
    sys.modules['pangocairo'] = PangoCairo

    # gdk
    gi.require_version('Gdk', version)
    gi.require_version('GdkPixbuf', '2.0')
    from gi.repository import Gdk
    from gi.repository import GdkPixbuf