aboutsummaryrefslogtreecommitdiffstats
path: root/sources/shiboken2/libshiboken/qapp_macro.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'sources/shiboken2/libshiboken/qapp_macro.cpp')
-rw-r--r--sources/shiboken2/libshiboken/qapp_macro.cpp184
1 files changed, 184 insertions, 0 deletions
diff --git a/sources/shiboken2/libshiboken/qapp_macro.cpp b/sources/shiboken2/libshiboken/qapp_macro.cpp
new file mode 100644
index 00000000..b31e98d0
--- /dev/null
+++ b/sources/shiboken2/libshiboken/qapp_macro.cpp
@@ -0,0 +1,184 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of PySide2.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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"
+
+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 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 = NULL;
+static PyObject *qApp_content = (PyObject *)&_Py_ChameleonQAppWrapper_Struct;
+static PyObject *qApp_moduledicts[5] = {0, 0, 0, 0, 0};
+static int qApp_var_ref = 0;
+static int qApp_content_ref = 0;
+
+static int
+reset_qApp_var()
+{
+ PyObject **mod_ptr;
+
+ for (mod_ptr = qApp_moduledicts; *mod_ptr != NULL; mod_ptr++) {
+ // We respect whatever the user may have set.
+ if (PyDict_GetItem(*mod_ptr, qApp_var) == NULL)
+ if (PyDict_SetItem(*mod_ptr, qApp_var, qApp_content) < 0)
+ return -1;
+ }
+ return 0;
+}
+
+
+PyObject *
+MakeSingletonQAppWrapper(PyTypeObject *type)
+{
+ if (type == NULL)
+ type = Py_NONE_TYPE;
+ if (!(type == Py_NONE_TYPE || Py_TYPE(qApp_content) == Py_NONE_TYPE)) {
+ const char *res_name = strrchr(Py_TYPE(qApp_content)->tp_name, '.')+1;
+ const char *type_name = strrchr(type->tp_name, '.')+1;
+ PyErr_Format(PyExc_RuntimeError, "Please destroy the %s singleton before"
+ " creating a new %s instance.", res_name, type_name);
+ return NULL;
+ }
+ if (reset_qApp_var() < 0)
+ return NULL;
+ // 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)
+ Py_REFCNT(qApp_var) = 1; // fuse is armed...
+ if (type == Py_NONE_TYPE) {
+ // 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().
+ PyObject *__moduleShutdown = PyDict_GetItemString(qApp_moduledicts[1],
+ "__moduleShutdown");
+ if (__moduleShutdown != NULL) {
+ Py_DECREF(PyObject_CallFunction(__moduleShutdown, (char *)"()"));
+ }
+ // restore the "None-state"
+ Py_TYPE(qApp_content) = Py_NONE_TYPE;
+ Py_REFCNT(qApp_var) = qApp_var_ref;
+ Py_REFCNT(qApp_content) = qApp_content_ref;
+ }
+ else
+ (void)PyObject_INIT(qApp_content, type);
+ Py_INCREF(qApp_content);
+ return qApp_content;
+}
+
+static int
+setup_qApp_var(PyObject *module)
+{
+ int module_index;
+ static int init_done = 0;
+
+ if (!init_done) {
+ qApp_var = Py_BuildValue("s", "qApp");
+ if (qApp_var == NULL)
+ return -1;
+ qApp_moduledicts[0] = PyEval_GetBuiltins();
+ 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) {
+ qApp_moduledicts[module_index] = PyModule_GetDict(module);
+ if (reset_qApp_var() < 0)
+ return -1;
+ }
+ return 0;
+}
+
+void
+NotifyModuleForQApp(PyObject *module)
+{
+ setup_qApp_var(module);
+}
+
+
+} //extern "C"
+
+// end of module