diff options
Diffstat (limited to 'sources/shiboken2/libshiboken/qapp_macro.cpp')
| -rw-r--r-- | sources/shiboken2/libshiboken/qapp_macro.cpp | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/sources/shiboken2/libshiboken/qapp_macro.cpp b/sources/shiboken2/libshiboken/qapp_macro.cpp deleted file mode 100644 index 306f53b74..000000000 --- a/sources/shiboken2/libshiboken/qapp_macro.cpp +++ /dev/null @@ -1,261 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2017 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 "basewrapper.h" -#include "autodecref.h" - -extern "C" -{ - -#include "qapp_macro.h" - -//////////////////////////////////////////////////////////////////////////// -// -// Support for the qApp macro. -// -// qApp is a macro in Qt5. In Python, we simulate that a little by a -// variable that monitors Q*Application.instance(). -// This variable is also able to destroy the app by deleting qApp. -// -static int -qApp_module_index(PyObject *module) -{ - const char *name = PyModule_GetName(module); - int ret = 0; - - if (strcmp(name, "PySide2.QtCore") == 0) - ret = 1; - else if (strcmp(name, "PySide2.QtGui") == 0) - ret = 2; - else if (strcmp(name, "PySide2.QtWidgets") == 0) - ret = 3; - return ret; -} - -#define PYTHON_IS_PYTHON3 (PY_VERSION_HEX >= 0x03000000) -#define PYTHON_IS_PYTHON2 (!PYTHON_IS_PYTHON3) -#define Py_NONE_TYPE Py_TYPE(Py_None) - -#if PYTHON_IS_PYTHON3 -# define BRACE_OPEN { -# define BRACE_CLOSE } -#else -# define BRACE_OPEN -# define BRACE_CLOSE -#endif - -static SbkObject _Py_ChameleonQAppWrapper_Struct = { - BRACE_OPEN - _PyObject_EXTRA_INIT - 1, Py_NONE_TYPE - BRACE_CLOSE -}; - -static PyObject *qApp_var = nullptr; -static PyObject *qApp_content = reinterpret_cast<PyObject *>(&_Py_ChameleonQAppWrapper_Struct); -static PyObject *qApp_moduledicts[5] = {nullptr, nullptr, nullptr, nullptr, nullptr}; -static int qApp_var_ref = 0; -static int qApp_content_ref = 0; - -static int -reset_qApp_var(void) -{ - PyObject **mod_ptr; - - for (mod_ptr = qApp_moduledicts; *mod_ptr != nullptr; mod_ptr++) { - // We respect whatever the user may have set. - PyObject *existing = PyDict_GetItem(*mod_ptr, qApp_var); - if (existing == nullptr || Py_TYPE(existing) == Py_NONE_TYPE) { - if (PyDict_SetItem(*mod_ptr, qApp_var, qApp_content) < 0) - return -1; - } - } - return 0; -} - -/* - * Note: - * The PYSIDE-585 problem was that shutdown is called one more often - * than Q*Application is created. We could special-case that last - * shutdown or add a refcount, initially, but actually it was easier - * and more intuitive in that context to make the refcount of - * qApp_content equal to the refcount of Py_None. - */ -PyObject * -MakeSingletonQAppWrapper(PyTypeObject *type) -{ - static bool app_created = false; - if (type == nullptr) - type = Py_NONE_TYPE; - if (!(type == Py_NONE_TYPE || Py_TYPE(qApp_content) == Py_NONE_TYPE)) { - const char *res_name = PepType_GetNameStr(Py_TYPE(qApp_content)); - const char *type_name = PepType_GetNameStr(type); - PyErr_Format(PyExc_RuntimeError, "Please destroy the %s singleton before" - " creating a new %s instance.", res_name, type_name); - return nullptr; - } - if (reset_qApp_var() < 0) - return nullptr; - // always know the max of the refs - if (Py_REFCNT(qApp_var) > qApp_var_ref) - qApp_var_ref = Py_REFCNT(qApp_var); - if (Py_REFCNT(qApp_content) > qApp_content_ref) - qApp_content_ref = Py_REFCNT(qApp_content); - - if (Py_TYPE(qApp_content) != Py_NONE_TYPE) { - // Remove the "_" variable which might hold a reference to qApp. - Shiboken::AutoDecRef pymain(PyImport_ImportModule("__main__")); - if (pymain.object() && PyObject_HasAttrString(pymain.object(), "_")) - PyObject_DelAttrString(pymain.object(), "_"); - Py_REFCNT(qApp_var) = 1; // fuse is armed... - } - if (type == Py_NONE_TYPE) { - // PYSIDE-1093: Ignore None when no instance has ever been created. - if (!app_created) - Py_RETURN_NONE; - // Debug mode showed that we need to do more than just remove the - // reference. To keep everything in the right order, it is easiest - // to do a full shutdown, using QtCore.__moduleShutdown(). - // restore the "None-state" - PyObject *__moduleShutdown = PyDict_GetItemString(qApp_moduledicts[1], - "__moduleShutdown"); - // PYSIDE-585: It was crucial to update the refcounts *before* - // calling the shutdown. - Py_TYPE(qApp_content) = Py_NONE_TYPE; - Py_REFCNT(qApp_var) = qApp_var_ref; - Py_REFCNT(qApp_content) = Py_REFCNT(Py_None); - if (__moduleShutdown != nullptr) - Py_XDECREF(PyObject_CallFunction(__moduleShutdown, const_cast<char *>("()"))); - } else { - PyObject_INIT(qApp_content, type); - app_created = true; - } - Py_INCREF(qApp_content); - return qApp_content; -} - -#if PYTHON_IS_PYTHON2 - -// Install support in Py_NONE_TYPE for Python 2: 'bool(qApp) == False'. -static int -none_bool(PyObject *v) -{ - return 0; -} - -static PyNumberMethods none_as_number = { - nullptr, /* nb_add */ - nullptr, /* nb_subtract */ - nullptr, /* nb_multiply */ - nullptr, /* nb_divide */ - nullptr, /* nb_remainder */ - nullptr, /* nb_divmod */ - nullptr, /* nb_power */ - nullptr, /* nb_negative */ - nullptr, /* nb_positive */ - nullptr, /* nb_absolute */ - reinterpret_cast<inquiry>(none_bool), /* nb_nonzero */ -}; - -#endif - -static int -setup_qApp_var(PyObject *module) -{ - int module_index; - static int init_done = 0; - - if (!init_done) { -#if PYTHON_IS_PYTHON2 - Py_NONE_TYPE->tp_as_number = &none_as_number; -#endif - qApp_var = Py_BuildValue("s", "qApp"); - if (qApp_var == nullptr) - return -1; - // This is a borrowed reference - qApp_moduledicts[0] = PyEval_GetBuiltins(); - Py_INCREF(qApp_moduledicts[0]); - init_done = 1; - } - - // Initialize qApp. We insert it into __dict__ for "import *" and also - // into __builtins__, to let it appear like a real macro. - module_index = qApp_module_index(module); - if (module_index) { - // This line gets a borrowed reference - qApp_moduledicts[module_index] = PyModule_GetDict(module); - Py_INCREF(qApp_moduledicts[module_index]); - if (reset_qApp_var() < 0) - return -1; - } - return 0; -} - -void -NotifyModuleForQApp(PyObject *module, void *qApp) -{ - setup_qApp_var(module); - /* - * PYSIDE-571: Check if an QApplication instance exists before the import. - * This happens in scriptableapplication and application_test.py . - * - * Crucial Observation - * =================== - * - * A Q*Application object from C++ does not have a wrapper or constructor - * like instances created by Python. It makes no sense to support - * deletion or special features like qApp resurrection. - * - * Therefore, the implementation is very simple and just redirects the - * qApp_contents variable and assigns the instance, instead of vice-versa. - */ - PyObject *coreDict = qApp_moduledicts[1]; - if (qApp != nullptr && coreDict != nullptr) { - PyObject *coreApp = PyDict_GetItemString(coreDict, "QCoreApplication"); - if (coreApp != nullptr) { - qApp_content = PyObject_CallMethod(coreApp, "instance", ""); - reset_qApp_var(); - } - } -} - - -} //extern "C" - -// end of module |