1 files changed, 97 insertions, 0 deletions
diff --git a/sources/pyside6/libpysideqml/pysideqmlmetacallerror.cpp b/sources/pyside6/libpysideqml/pysideqmlmetacallerror.cpp
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index 000000000..4887e3f51
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+++ b/sources/pyside6/libpysideqml/pysideqmlmetacallerror.cpp
@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 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 "pysideqmlmetacallerror_p.h"
+
+#include <sbkpython.h>
+#include <sbkstring.h>
+#include <autodecref.h>
+
+#include <QtCore/QObject>
+#include <QtCore/QString>
+
+#include <QtQml/QQmlEngine>
+#include <QtQml/QQmlListProperty>
+
+#if __has_include (<private/qv4engine_p.h>)
+#  define QML_PRIVATE_API_SUPPORT
+#  include <private/qv4engine_p.h>
+#  include <private/qv4context_p.h>
+#  include <private/qqmldata_p.h>
+#endif
+
+namespace PySide {
+
+std::optional<int> qmlMetaCallErrorHandler(QObject *object)
+{
+#ifdef QML_PRIVATE_API_SUPPORT
+    // This JS engine grabber based off of Qt 5.5's `qjsEngine` function
+    QQmlData *data = QQmlData::get(object, false);
+    if (!data || data->jsWrapper.isNullOrUndefined())
+        return {};
+
+    QV4::ExecutionEngine *engine = data->jsWrapper.engine();
+    if (engine->currentStackFrame == nullptr)
+        return {};
+
+    PyObject *errType, *errValue, *errTraceback;
+    PyErr_Fetch(&errType, &errValue, &errTraceback);
+    // PYSIDE-464: The error is only valid before PyErr_Restore,
+    // PYSIDE-464: therefore we take local copies.
+    Shiboken::AutoDecRef objStr(PyObject_Str(errValue));
+    const QString errString = QLatin1String(Shiboken::String::toCString(objStr));
+    const bool isSyntaxError = errType == PyExc_SyntaxError;
+    const bool isTypeError = errType == PyExc_TypeError;
+    PyErr_Restore(errType, errValue, errTraceback);
+
+    PyErr_Print();    // Note: PyErr_Print clears the error.
+
+    if (isSyntaxError)
+        return engine->throwSyntaxError(errString);
+    if (isTypeError)
+        return engine->throwTypeError(errString);
+    return engine->throwError(errString);
+#else
+    Q_UNUSED(object);
+    qWarning("libpyside6qml was built without QML private API support, error handling will not work.");
+    return {};
+#endif //  QML_PRIVATE_API_SUPPORT
+}
+
+} // namespace PySide