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# -*- Mode: Python; py-indent-offset: 4 -*-
#
# Copyright (C) 2007 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
#
import os
import gobject
from gobject import GEnum
from .btypes import Function, BaseBlob, buildType
from .repo import EnumInfo, FunctionInfo, ObjectInfo, UnresolvedInfo, \
InterfaceInfo, StructInfo, BoxedInfo
from .repository import repository
class DynamicModule(object):
def __init__(self, namespace, path):
self._namespace = namespace
self._path = path
repository.register(self, namespace, path)
self.created()
@property
def __file__(self):
return self._namespace
@property
def __name__(self):
return self._namespace
@property
def __path__(self):
return [os.path.dirname(self.__file__)]
def __repr__(self):
return "<dyn-module %r from %r>" % (self._namespace, self._path)
def __getattr__(self, name):
type_info = repository.get_by_name(self._namespace, name)
if not type_info:
raise AttributeError("%r object has no attribute %r" % (
self.__class__.__name__, name))
value = self._create_attribute(name, type_info)
self.__dict__[name] = value
return value
@property
def __members__(self):
r = []
for type_info in repository.get_infos(self._namespace):
if type_info is None:
continue
r.append(type_info.getName())
return r
# Override this in a subclass
def created(self):
pass
# Private API
def _create_attribute(self, attr, type_info):
if isinstance(type_info, ObjectInfo):
return self._create_object(type_info)
elif isinstance(type_info, EnumInfo):
return self._create_enum(type_info)
elif isinstance(type_info, FunctionInfo):
return self._create_function(type_info)
elif isinstance(type_info, InterfaceInfo):
return self._create_interface(type_info)
elif isinstance(type_info, StructInfo) or \
isinstance(type_info, BoxedInfo):
return self._create_boxed(type_info)
else:
raise NotImplementedError(type_info)
def _get_parent_for_object(self, object_info):
parent_info = object_info.getParent()
if isinstance(parent_info, UnresolvedInfo):
namespace = parent_info.getNamespace()
__import__(namespace)
parent_info = object_info.getParent()
if not parent_info:
parent = object
else:
namespace = parent_info.getNamespace()
module = repository.get_module(namespace)
name = parent_info.getName()
try:
# Hack for gobject.Object
if module == gobject and name == 'Object':
name = 'GObject'
parent = getattr(module, name)
except AttributeError:
return self._get_parent_for_object(parent_info)
if parent is None:
parent = object
return parent
def _create_object(self, object_info):
name = object_info.getName()
namespace = repository.get_c_prefix(object_info.getNamespace())
full_name = namespace + name
object_info.getGType()
gtype = None
try:
gtype = gobject.GType.from_name(full_name)
except RuntimeError:
pass
else:
if gtype.pytype is not None:
return gtype.pytype
# Check if the klass is already created, eg
# present in our namespace, this is necessary since we're
# not always entering here through the __getattr__ hook.
klass = self.__dict__.get(name)
if klass:
return klass
parent = self._get_parent_for_object(object_info)
klass = buildType(object_info, (parent,))
if gtype is not None:
klass.__gtype__ = gtype
gtype.pytype = klass
self.__dict__[name] = klass
return klass
def _create_enum(self, enum_info):
ns = dict(__name__=enum_info.getName(),
__module__=enum_info.getNamespace())
for value in enum_info.getValues():
ns[value.getName().upper()] = value.getValue()
return type(enum_info.getName(), (GEnum,), ns)
def _create_function(self, function_info):
return Function(function_info)
def _create_interface(self, interface_info):
name = interface_info.getName()
namespace = repository.get_c_prefix(interface_info.getNamespace())
full_name = namespace + name
interface_info.getGType()
gtype = None
try:
gtype = gobject.GType.from_name(full_name)
except RuntimeError:
pass
else:
if gtype.pytype is not None:
return gtype.pytype
# Check if the klass is already created, eg
# present in our namespace, this is necessary since we're
# not always entering here through the __getattr__ hook.
klass = self.__dict__.get(name)
if klass:
return klass
bases = (gobject.GInterface,)
klass = buildType(interface_info, bases)
if gtype is not None:
klass.__gtype__ = gtype
gtype.pytype = klass
interface_info.register()
self.__dict__[name] = klass
return klass
def _create_boxed(self, boxed_info):
name = boxed_info.getName()
namespace = repository.get_c_prefix(boxed_info.getNamespace())
full_name = namespace + name
boxed_info.getGType()
gtype = None
try:
gtype = gobject.GType.from_name(full_name)
except RuntimeError:
pass
else:
if gtype.pytype is not None:
return gtype.pytype
# Check if the klass is already created, eg
# present in our namespace, this is necessary since we're
# not always entering here through the __getattr__ hook.
klass = self.__dict__.get(name)
if klass:
return klass
bases = (BaseBlob,)
if isinstance(boxed_info, BoxedInfo):
bases += gobject.Boxed
klass = buildType(boxed_info, bases)
if gtype is not None:
klass.__gtype__ = gtype
gtype.pytype = klass
self.__dict__[name] = klass
return klass
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