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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "pysideqmlmetacallerror_p.h"
#include <sbkpython.h>
#include <sbkstring.h>
#include <autodecref.h>
// Remove deprecated MACRO of copysign for MSVC #86286
// https://github.com/python/cpython/issues/86286
#ifdef copysign
# undef copysign
#endif
#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::Qml {
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 = QString::fromUtf8(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::Qml
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