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Diffstat (limited to 'sources/pyside2/libpyside/class_property.cpp')
| -rw-r--r-- | sources/pyside2/libpyside/class_property.cpp | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/sources/pyside2/libpyside/class_property.cpp b/sources/pyside2/libpyside/class_property.cpp deleted file mode 100644 index 90ce0d2f3..000000000 --- a/sources/pyside2/libpyside/class_property.cpp +++ /dev/null @@ -1,158 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2020 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of Qt for Python. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "pyside.h" -#include "pysidestaticstrings.h" -#include "feature_select.h" -#include "class_property.h" - -#include <shiboken.h> -#include <sbkstaticstrings.h> - -extern "C" { - -/* - * A `classproperty` is the same as a `property` but the `__get__()` and `__set__()` - * methods are modified to always use the object class instead of a concrete instance. - * - * Note: A "static property" as it is often called does not exist per se. - * Static methods do not receive anything when created. Static methods which - * should participate in a property must be turned into class methods, before. - * See function `createProperty` in `feature_select.cpp`. - */ - -// `class_property.__get__()`: Always pass the class instead of the instance. -static PyObject *PyClassProperty_get(PyObject *self, PyObject * /*ob*/, PyObject *cls) -{ - return PyProperty_Type.tp_descr_get(self, cls, cls); -} - -// `class_property.__set__()`: Just like the above `__get__()`. -static int PyClassProperty_set(PyObject *self, PyObject *obj, PyObject *value) -{ - PyObject *cls = PyType_Check(obj) ? obj : reinterpret_cast<PyObject *>(Py_TYPE(obj)); - return PyProperty_Type.tp_descr_set(self, cls, value); -} - -// The property `__doc__` default does not work for class properties -// because PyProperty_Type.tp_init thinks this is a subclass which needs PyObject_SetAttr. -// We call `__init__` while pretending to be a PyProperty_Type instance. -static int PyClassProperty_init(PyObject *self, PyObject *args, PyObject *kwargs) -{ - auto hold = Py_TYPE(self); - Py_TYPE(self) = &PyProperty_Type; - auto ret = PyProperty_Type.tp_init(self, args, kwargs); - Py_TYPE(self) = hold; - return ret; -} - -static PyType_Slot PyClassProperty_slots[] = { - {Py_tp_getset, nullptr}, // will be set below - {Py_tp_base, reinterpret_cast<void *>(&PyProperty_Type)}, - {Py_tp_descr_get, reinterpret_cast<void *>(PyClassProperty_get)}, - {Py_tp_descr_set, reinterpret_cast<void *>(PyClassProperty_set)}, - {Py_tp_init, reinterpret_cast<void *>(PyClassProperty_init)}, - {0, 0} -}; - -static PyType_Spec PyClassProperty_spec = { - "PySide2.PyClassProperty", - sizeof(propertyobject), - 0, - Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, - PyClassProperty_slots, -}; - -PyTypeObject *PyClassPropertyTypeF() -{ - static PyTypeObject *type = nullptr; - if (type == nullptr) { - // Provide the same `tp_getset`, which is not inherited. - PyClassProperty_slots[0].pfunc = PyProperty_Type.tp_getset; - type = reinterpret_cast<PyTypeObject *>( - PyType_FromSpec(&PyClassProperty_spec)); - } - return type; -} - -/* - * Types with class properties need to handle `Type.class_prop = x` in a specific way. - * By default, Python replaces the `class_property` itself, but for wrapped C++ types - * we need to call `class_property.__set__()` in order to propagate the new value to - * the underlying C++ data structure. - */ -static int SbkObjectType_meta_setattro(PyObject *obj, PyObject *name, PyObject *value) -{ - // Use `_PepType_Lookup()` instead of `PyObject_GetAttr()` in order to get the raw - // descriptor (`property`) instead of calling `tp_descr_get` (`property.__get__()`). - auto type = reinterpret_cast<PyTypeObject *>(obj); - PyObject *descr = _PepType_Lookup(type, name); - - // The following assignment combinations are possible: - // 1. `Type.class_prop = value` --> descr_set: `Type.class_prop.__set__(value)` - // 2. `Type.class_prop = other_class_prop` --> setattro: replace existing `class_prop` - // 3. `Type.regular_attribute = value` --> setattro: regular attribute assignment - const auto class_prop = reinterpret_cast<PyObject *>(PyClassPropertyTypeF()); - const auto call_descr_set = descr && PyObject_IsInstance(descr, class_prop) - && !PyObject_IsInstance(value, class_prop); - if (call_descr_set) { - // Call `class_property.__set__()` instead of replacing the `class_property`. - return Py_TYPE(descr)->tp_descr_set(descr, obj, value); - } else { - // Replace existing attribute. - return PyType_Type.tp_setattro(obj, name, value); - } -} - -} // extern "C" - -/* - * These functions are added to the SbkObjectType_TypeF() dynamically. - */ -namespace PySide { namespace ClassProperty { - -void init() -{ - PyTypeObject *type = SbkObjectType_TypeF(); - type->tp_setattro = SbkObjectType_meta_setattro; - Py_TYPE(PyClassPropertyTypeF()) = type; -} - -} // namespace ClassProperty -} // namespace PySide |