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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 | # -*- Mode: Python; py-indent-offset: 4 -*- # vim: tabstop=4 shiftwidth=4 expandtab # # Copyright (C) 2007-2009 Johan Dahlin <johan@gnome.org> # # module.py: dynamic module for introspected libraries. # # 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 importlib _have_py3 = (sys.version_info[0] >= 3) try: maketrans = ''.maketrans except AttributeError: # fallback for Python 2 from string import maketrans import gi from ._gi import \ Repository, \ FunctionInfo, \ RegisteredTypeInfo, \ EnumInfo, \ ObjectInfo, \ InterfaceInfo, \ ConstantInfo, \ StructInfo, \ UnionInfo, \ CallbackInfo, \ Struct, \ Boxed, \ CCallback, \ enum_add, \ enum_register_new_gtype_and_add, \ flags_add, \ flags_register_new_gtype_and_add, \ GInterface from .types import \ GObjectMeta, \ StructMeta from ._constants import \ TYPE_NONE, \ TYPE_BOXED, \ TYPE_POINTER, \ TYPE_ENUM, \ TYPE_FLAGS repository = Repository.get_default() # Cache of IntrospectionModules that have been loaded. _introspection_modules = {} def get_parent_for_object(object_info): parent_object_info = object_info.get_parent() if not parent_object_info: # If we reach the end of the introspection info class hierarchy, look # for an existing wrapper on the GType and use it as a base for the # new introspection wrapper. This allows static C wrappers already # registered with the GType to be used as the introspection base # (_gi.GObject for example) gtype = object_info.get_g_type() if gtype and gtype.pytype: return gtype.pytype # Otherwise use builtins.object as the base return object namespace = parent_object_info.get_namespace() name = parent_object_info.get_name() module = importlib.import_module('gi.repository.' + namespace) return getattr(module, name) def get_interfaces_for_object(object_info): interfaces = [] for interface_info in object_info.get_interfaces(): namespace = interface_info.get_namespace() name = interface_info.get_name() module = importlib.import_module('gi.repository.' + namespace) interfaces.append(getattr(module, name)) return interfaces class IntrospectionModule(object): """An object which wraps an introspection typelib. This wrapping creates a python module like representation of the typelib using gi repository as a foundation. Accessing attributes of the module will dynamically pull them in and create wrappers for the members. These members are then cached on this introspection module. """ def __init__(self, namespace, version=None): """Might raise gi._gi.RepositoryError""" repository.require(namespace, version) self._namespace = namespace self._version = version self.__name__ = 'gi.repository.' + namespace path = repository.get_typelib_path(self._namespace) self.__path__ = [path] if _have_py3: # get_typelib_path() delivers bytes, not a string self.__path__ = [path.decode('UTF-8')] if self._version is None: self._version = repository.get_version(self._namespace) def __getattr__(self, name): info = repository.find_by_name(self._namespace, name) if not info: raise AttributeError("%r object has no attribute %r" % ( self.__name__, name)) if isinstance(info, EnumInfo): g_type = info.get_g_type() wrapper = g_type.pytype if wrapper is None: if info.is_flags(): if g_type.is_a(TYPE_FLAGS): wrapper = flags_add(g_type) else: assert g_type == TYPE_NONE wrapper = flags_register_new_gtype_and_add(info) else: if g_type.is_a(TYPE_ENUM): wrapper = enum_add(g_type) else: assert g_type == TYPE_NONE wrapper = enum_register_new_gtype_and_add(info) wrapper.__info__ = info wrapper.__module__ = 'gi.repository.' + info.get_namespace() # Don't use upper() here to avoid locale specific # identifier conversion (e. g. in Turkish 'i'.upper() == 'i') # see https://bugzilla.gnome.org/show_bug.cgi?id=649165 ascii_upper_trans = maketrans( 'abcdefgjhijklmnopqrstuvwxyz', 'ABCDEFGJHIJKLMNOPQRSTUVWXYZ') for value_info in info.get_values(): value_name = value_info.get_name_unescaped().translate(ascii_upper_trans) setattr(wrapper, value_name, wrapper(value_info.get_value())) for method_info in info.get_methods(): setattr(wrapper, method_info.__name__, method_info) if g_type != TYPE_NONE: g_type.pytype = wrapper elif isinstance(info, RegisteredTypeInfo): g_type = info.get_g_type() # Create a wrapper. if isinstance(info, ObjectInfo): parent = get_parent_for_object(info) interfaces = tuple(interface for interface in get_interfaces_for_object(info) if not issubclass(parent, interface)) bases = (parent,) + interfaces metaclass = GObjectMeta elif isinstance(info, CallbackInfo): bases = (CCallback,) metaclass = GObjectMeta elif isinstance(info, InterfaceInfo): bases = (GInterface,) metaclass = GObjectMeta elif isinstance(info, (StructInfo, UnionInfo)): if g_type.is_a(TYPE_BOXED): bases = (Boxed,) elif (g_type.is_a(TYPE_POINTER) or g_type == TYPE_NONE or g_type.fundamental == g_type): bases = (Struct,) else: raise TypeError("unable to create a wrapper for %s.%s" % (info.get_namespace(), info.get_name())) metaclass = StructMeta else: raise NotImplementedError(info) # Check if there is already a Python wrapper that is not a parent class # of the wrapper being created. If it is a parent, it is ok to clobber # g_type.pytype with a new child class wrapper of the existing parent. # Note that the return here never occurs under normal circumstances due # to caching on the __dict__ itself. if g_type != TYPE_NONE: type_ = g_type.pytype if type_ is not None and type_ not in bases: self.__dict__[name] = type_ return type_ dict_ = { '__info__': info, '__module__': 'gi.repository.' + self._namespace, '__gtype__': g_type } wrapper = metaclass(name, bases, dict_) # Register the new Python wrapper. if g_type != TYPE_NONE: g_type.pytype = wrapper elif isinstance(info, FunctionInfo): wrapper = info elif isinstance(info, ConstantInfo): wrapper = info.get_value() else: raise NotImplementedError(info) # Cache the newly created wrapper which will then be # available directly on this introspection module instead of being # lazily constructed through the __getattr__ we are currently in. self.__dict__[name] = wrapper return wrapper def __repr__(self): path = repository.get_typelib_path(self._namespace) if _have_py3: # get_typelib_path() delivers bytes, not a string path = path.decode('UTF-8') return "<IntrospectionModule %r from %r>" % (self._namespace, path) def __dir__(self): # Python's default dir() is just dir(self.__class__) + self.__dict__.keys() result = set(dir(self.__class__)) result.update(self.__dict__.keys()) # update *set* because some repository attributes have already been # wrapped by __getattr__() and included in self.__dict__; but skip # Callback types, as these are not real objects which we can actually # get namespace_infos = repository.get_infos(self._namespace) result.update(info.get_name() for info in namespace_infos if not isinstance(info, CallbackInfo)) return list(result) def get_introspection_module(namespace): """ :Returns: An object directly wrapping the gi module without overrides. Might raise gi._gi.RepositoryError """ if namespace in _introspection_modules: return _introspection_modules[namespace] version = gi.get_required_version(namespace) module = IntrospectionModule(namespace, version) _introspection_modules[namespace] = module return module