1 /* -*- Mode: C; c-basic-offset: 4 -*-
2 * pygtk- Python bindings for the GTK toolkit.
3 * Copyright (C) 1998-2003 James Henstridge
4 * Copyright (C) 2004 Johan Dahlin
6 * pygenum.c: GEnum wrapper
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
27 #include "pyglib-python-compat.h"
28 #include "pygi-type.h"
29 #include "pygi-util.h"
35 GQuark pygenum_class_key;
37 PYGLIB_DEFINE_TYPE("gobject.GEnum", PyGEnum_Type, PyGEnum);
40 pyg_enum_val_new(PyObject* subclass, GType gtype, PyObject *intval)
42 PyObject *args, *item;
43 args = Py_BuildValue("(O)", intval);
44 item = (&PYGLIB_PyLong_Type)->tp_new((PyTypeObject*)subclass, args, NULL);
48 ((PyGEnum*)item)->gtype = gtype;
54 pyg_enum_richcompare(PyGEnum *self, PyObject *other, int op)
56 static char warning[256];
58 if (!PYGLIB_PyLong_Check(other)) {
59 Py_INCREF(Py_NotImplemented);
60 return Py_NotImplemented;
63 if (PyObject_TypeCheck(other, &PyGEnum_Type) && ((PyGEnum*)other)->gtype != self->gtype) {
64 g_snprintf(warning, sizeof(warning), "comparing different enum types: %s and %s",
65 g_type_name(self->gtype), g_type_name(((PyGEnum*)other)->gtype));
66 if (PyErr_Warn(PyExc_Warning, warning))
70 return pyg_integer_richcompare((PyObject *)self, other, op);
74 pyg_enum_repr(PyGEnum *self)
77 GEnumClass *enum_class;
80 char *namespace, *module_str;
84 module = PyObject_GetAttrString ((PyObject *)self, "__module__");
88 if (!PYGLIB_PyUnicode_Check (module)) {
93 enum_class = g_type_class_ref(self->gtype);
94 g_assert(G_IS_ENUM_CLASS(enum_class));
96 l = PYGLIB_PyLong_AS_LONG(self);
97 for (index = 0; index < enum_class->n_values; index++)
98 if (l == enum_class->values[index].value)
101 module_str = PYGLIB_PyUnicode_AsString (module);
102 namespace = g_strrstr (module_str, ".");
103 if (namespace == NULL) {
104 namespace = module_str;
109 value = enum_class->values[index].value_name;
111 sprintf(tmp, "<enum %s of type %s.%s>", value,
112 namespace, Py_TYPE (self)->tp_name);
114 sprintf(tmp, "<enum %ld of type %s.%s>", PYGLIB_PyLong_AS_LONG(self),
115 namespace, Py_TYPE (self)->tp_name);
117 g_type_class_unref(enum_class);
119 return PYGLIB_PyUnicode_FromString(tmp);
123 pyg_enum_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
125 static char *kwlist[] = { "value", NULL };
127 PyObject *pytc, *values, *ret, *intvalue;
131 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "l", kwlist, &value))
134 pytc = PyObject_GetAttrString((PyObject *)type, "__gtype__");
138 if (!PyObject_TypeCheck(pytc, &PyGTypeWrapper_Type)) {
140 PyErr_SetString(PyExc_TypeError,
141 "__gtype__ attribute not a typecode");
145 gtype = pyg_type_from_object(pytc);
148 eclass = G_ENUM_CLASS(g_type_class_ref(gtype));
150 /* A check that 0 < value < eclass->n_values was here but got
151 * removed: enumeration values do not need to be consequitive,
152 * e.g. GtkPathPriorityType values are not.
155 values = PyObject_GetAttrString((PyObject *)type, "__enum_values__");
157 g_type_class_unref(eclass);
161 /* Note that size of __enum_values__ dictionary can easily be less
162 * than 'n_values'. This happens if some values of the enum are
163 * numerically equal, e.g. gtk.ANCHOR_N == gtk.ANCHOR_NORTH.
164 * Johan said that "In retrospect, using a dictionary to store the
165 * values might not have been that good", but we need to keep
166 * backward compatibility.
168 if (!PyDict_Check(values) || PyDict_Size(values) > eclass->n_values) {
169 PyErr_SetString(PyExc_TypeError, "__enum_values__ badly formed");
171 g_type_class_unref(eclass);
175 g_type_class_unref(eclass);
177 intvalue = PYGLIB_PyLong_FromLong(value);
178 ret = PyDict_GetItem(values, intvalue);
184 PyErr_Format(PyExc_ValueError, "invalid enum value: %ld", value);
190 pyg_enum_from_gtype (GType gtype, int value)
192 PyObject *pyclass, *values, *retval, *intvalue;
194 g_return_val_if_fail(gtype != G_TYPE_INVALID, NULL);
196 /* Get a wrapper class by:
197 * 1. check for one attached to the gtype
198 * 2. lookup one in a typelib
199 * 3. creating a new one
201 pyclass = (PyObject*)g_type_get_qdata(gtype, pygenum_class_key);
203 pyclass = pygi_type_import_by_g_type(gtype);
205 pyclass = pyg_enum_add(NULL, g_type_name(gtype), NULL, gtype);
207 return PYGLIB_PyLong_FromLong(value);
209 values = PyDict_GetItemString(((PyTypeObject *)pyclass)->tp_dict,
211 intvalue = PYGLIB_PyLong_FromLong(value);
212 retval = PyDict_GetItem(values, intvalue);
218 retval = pyg_enum_val_new(pyclass, gtype, intvalue);
227 * Dynamically create a class derived from PyGEnum based on the given GType.
230 pyg_enum_add (PyObject * module,
231 const char * typename,
232 const char * strip_prefix,
235 PyGILState_STATE state;
236 PyObject *instance_dict, *stub, *values, *o;
240 g_return_val_if_fail(typename != NULL, NULL);
241 if (!g_type_is_a (gtype, G_TYPE_ENUM)) {
242 PyErr_Format (PyExc_TypeError, "Trying to register gtype '%s' as enum when in fact it is of type '%s'",
243 g_type_name (gtype), g_type_name (G_TYPE_FUNDAMENTAL (gtype)));
247 state = pyglib_gil_state_ensure();
249 /* Create a new type derived from GEnum. This is the same as:
250 * >>> stub = type(typename, (GEnum,), {})
252 instance_dict = PyDict_New();
253 stub = PyObject_CallFunction((PyObject *)&PyType_Type, "s(O)O",
254 typename, (PyObject *)&PyGEnum_Type,
256 Py_DECREF(instance_dict);
258 PyErr_SetString(PyExc_RuntimeError, "can't create const");
259 pyglib_gil_state_release(state);
263 ((PyTypeObject *)stub)->tp_flags &= ~Py_TPFLAGS_BASETYPE;
264 ((PyTypeObject *)stub)->tp_new = pyg_enum_new;
267 PyDict_SetItemString(((PyTypeObject *)stub)->tp_dict,
269 PYGLIB_PyUnicode_FromString(PyModule_GetName(module)));
271 g_type_set_qdata(gtype, pygenum_class_key, stub);
273 o = pyg_type_wrapper_new(gtype);
274 PyDict_SetItemString(((PyTypeObject *)stub)->tp_dict, "__gtype__", o);
278 /* Add it to the module name space */
279 PyModule_AddObject(module, (char*)typename, stub);
283 /* Register enum values */
284 eclass = G_ENUM_CLASS(g_type_class_ref(gtype));
286 values = PyDict_New();
287 for (i = 0; i < eclass->n_values; i++) {
288 PyObject *item, *intval;
290 intval = PYGLIB_PyLong_FromLong(eclass->values[i].value);
291 item = pyg_enum_val_new(stub, gtype, intval);
292 PyDict_SetItem(values, intval, item);
298 prefix = g_strdup(pyg_constant_strip_prefix(eclass->values[i].value_name, strip_prefix));
299 PyModule_AddObject(module, prefix, item);
306 PyDict_SetItemString(((PyTypeObject *)stub)->tp_dict,
307 "__enum_values__", values);
310 g_type_class_unref(eclass);
312 pyglib_gil_state_release(state);
317 pyg_enum_reduce(PyObject *self, PyObject *args)
319 if (!PyArg_ParseTuple(args, ":GEnum.__reduce__"))
322 return Py_BuildValue("(O(i)O)", Py_TYPE(self), PYGLIB_PyLong_AsLong(self),
323 PyObject_GetAttrString(self, "__dict__"));
327 pyg_enum_get_value_name(PyGEnum *self, void *closure)
329 GEnumClass *enum_class;
330 GEnumValue *enum_value;
333 enum_class = g_type_class_ref(self->gtype);
334 g_assert(G_IS_ENUM_CLASS(enum_class));
336 enum_value = g_enum_get_value(enum_class, PYGLIB_PyLong_AS_LONG(self));
338 retval = PYGLIB_PyUnicode_FromString(enum_value->value_name);
339 g_type_class_unref(enum_class);
345 pyg_enum_get_value_nick(PyGEnum *self, void *closure)
347 GEnumClass *enum_class;
348 GEnumValue *enum_value;
351 enum_class = g_type_class_ref(self->gtype);
352 g_assert(G_IS_ENUM_CLASS(enum_class));
354 enum_value = g_enum_get_value(enum_class, PYGLIB_PyLong_AS_LONG(self));
356 retval = PYGLIB_PyUnicode_FromString(enum_value->value_nick);
357 g_type_class_unref(enum_class);
363 static PyMethodDef pyg_enum_methods[] = {
364 { "__reduce__", (PyCFunction)pyg_enum_reduce, METH_VARARGS },
368 static PyGetSetDef pyg_enum_getsets[] = {
369 { "value_name", (getter)pyg_enum_get_value_name, (setter)0 },
370 { "value_nick", (getter)pyg_enum_get_value_nick, (setter)0 },
375 pygobject_enum_register_types(PyObject *d)
377 pygenum_class_key = g_quark_from_static_string("PyGEnum::class");
379 PyGEnum_Type.tp_base = &PYGLIB_PyLong_Type;
380 #if PY_VERSION_HEX < 0x03000000
381 PyGEnum_Type.tp_new = pyg_enum_new;
383 PyGEnum_Type.tp_new = PyLong_Type.tp_new;
384 PyGEnum_Type.tp_hash = PyLong_Type.tp_hash;
386 PyGEnum_Type.tp_repr = (reprfunc)pyg_enum_repr;
387 PyGEnum_Type.tp_str = (reprfunc)pyg_enum_repr;
388 PyGEnum_Type.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE;
389 PyGEnum_Type.tp_richcompare = (richcmpfunc)pyg_enum_richcompare;
390 PyGEnum_Type.tp_methods = pyg_enum_methods;
391 PyGEnum_Type.tp_getset = pyg_enum_getsets;
392 PYGOBJECT_REGISTER_GTYPE(d, PyGEnum_Type, "GEnum", G_TYPE_ENUM);