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**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** 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
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** 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
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****************************************************************************/
#ifndef QJSENGINE_H
#define QJSENGINE_H
#include <QtCore/qmetatype.h>
#include <QtCore/qvariant.h>
#include <QtCore/qsharedpointer.h>
#include <QtCore/qobject.h>
#include <QtQml/qjsvalue.h>
QT_BEGIN_NAMESPACE
class QV8Engine;
template <typename T>
inline T qjsvalue_cast(const QJSValue &);
class QJSEnginePrivate;
class Q_QML_EXPORT QJSEngine
: public QObject
{
Q_OBJECT
public:
QJSEngine();
explicit QJSEngine(QObject *parent);
virtual ~QJSEngine();
QJSValue globalObject() const;
QJSValue evaluate(const QString &program, const QString &fileName = QString(), int lineNumber = 1);
QJSValue newObject();
QJSValue newArray(uint length = 0);
QJSValue newQObject(QObject *object);
template <typename T>
inline QJSValue toScriptValue(const T &value)
{
return create(qMetaTypeId<T>(), &value);
}
template <typename T>
inline T fromScriptValue(const QJSValue &value)
{
return qjsvalue_cast<T>(value);
}
void collectGarbage();
#if QT_DEPRECATED_SINCE(5, 6)
QT_DEPRECATED void installTranslatorFunctions(const QJSValue &object = QJSValue());
#endif
enum Extension {
TranslationExtension = 0x1,
ConsoleExtension = 0x2,
GarbageCollectionExtension = 0x4,
AllExtensions = 0xffffffff
};
Q_DECLARE_FLAGS(Extensions, Extension)
void installExtensions(Extensions extensions, const QJSValue &object = QJSValue());
QV8Engine *handle() const { return d; }
private:
QJSValue create(int type, const void *ptr);
static bool convertV2(const QJSValue &value, int type, void *ptr);
friend inline bool qjsvalue_cast_helper(const QJSValue &, int, void *);
protected:
QJSEngine(QJSEnginePrivate &dd, QObject *parent = Q_NULLPTR);
private:
QV8Engine *d;
Q_DISABLE_COPY(QJSEngine)
Q_DECLARE_PRIVATE(QJSEngine)
friend class QV8Engine;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QJSEngine::Extensions)
inline bool qjsvalue_cast_helper(const QJSValue &value, int type, void *ptr)
{
return QJSEngine::convertV2(value, type, ptr);
}
template<typename T>
T qjsvalue_cast(const QJSValue &value)
{
T t;
const int id = qMetaTypeId<T>();
if (qjsvalue_cast_helper(value, id, &t))
return t;
else if (value.isVariant())
return qvariant_cast<T>(value.toVariant());
return T();
}
template <>
inline QVariant qjsvalue_cast<QVariant>(const QJSValue &value)
{
return value.toVariant();
}
Q_QML_EXPORT QJSEngine *qjsEngine(const QObject *);
QT_END_NAMESPACE
#endif // QJSENGINE_H
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