qjsvalue.h

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// Copyright (C) 2016 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
 
#ifndef QJSVALUE_H
#define QJSVALUE_H
 
#include <QtQml/qtqmlglobal.h>
#include <QtCore/qstring.h>
#include <QtCore/qlist.h>
#include <QtCore/qmetatype.h>
 
QT_BEGIN_NAMESPACE
 
class QJSValue;
class QJSEngine;
class QVariant;
class QObject;
struct QMetaObject;
class QDateTime;
class QJSPrimitiveValue;
 
typedef QList<QJSValue> QJSValueList;
namespace QV4 {
    struct ExecutionEngine;
}
 
class QJSPrimitiveValue;
class QJSManagedValue;
 
class Q_QML_EXPORT QJSValue
{
public:
    enum SpecialValue {
        NullValue,
        UndefinedValue
    };
 
    enum ErrorType {
        NoError,
        GenericError,
        EvalError,
        RangeError,
        ReferenceError,
        SyntaxError,
        TypeError,
        URIError
    };
 
    enum ObjectConversionBehavior {
        ConvertJSObjects,
        RetainJSObjects
    };
 
public:
    QJSValue(SpecialValue value = UndefinedValue);
    ~QJSValue();
    QJSValue(const QJSValue &other);
 
    inline QJSValue(QJSValue && other) : d(other.d) { other.d = 0; }
    inline QJSValue &operator=(QJSValue &&other)
    { std::swap(d, other.d); return *this; }
 
    QJSValue(bool value);
    QJSValue(int value);
    QJSValue(uint value);
    QJSValue(double value);
    QJSValue(const QString &value);
    QJSValue(const QLatin1String &value);
#ifndef QT_NO_CAST_FROM_ASCII
    QT_ASCII_CAST_WARN QJSValue(const char *str);
#endif
 
    QJSValue &operator=(const QJSValue &other);
 
    explicit QJSValue(QJSPrimitiveValue &&value);
    explicit QJSValue(QJSManagedValue &&value);
 
    bool isBool() const;
    bool isNumber() const;
    bool isNull() const;
    bool isString() const;
    bool isUndefined() const;
    bool isVariant() const;
    bool isQObject() const;
    bool isQMetaObject() const;
    bool isObject() const;
    bool isDate() const;
    bool isRegExp() const;
    bool isArray() const;
    bool isError() const;
    bool isUrl() const;
 
    QString toString() const;
    double toNumber() const;
    qint32 toInt() const;
    quint32 toUInt() const;
    bool toBool() const;
 
    QVariant toVariant() const;
    QVariant toVariant(ObjectConversionBehavior behavior) const;
    QJSPrimitiveValue toPrimitive() const;
 
    QObject *toQObject() const;
    const QMetaObject *toQMetaObject() const;
    QDateTime toDateTime() const;
 
    bool equals(const QJSValue &other) const;
    bool strictlyEquals(const QJSValue &other) const;
 
    QJSValue prototype() const;
    void setPrototype(const QJSValue &prototype);
 
    QJSValue property(const QString &name) const;
    void setProperty(const QString &name, const QJSValue &value);
 
    bool hasProperty(const QString &name) const;
    bool hasOwnProperty(const QString &name) const;
 
    QJSValue property(quint32 arrayIndex) const;
    void setProperty(quint32 arrayIndex, const QJSValue &value);
 
    bool deleteProperty(const QString &name);
 
    bool isCallable() const;
    QJSValue call(const QJSValueList &args = QJSValueList()) const;
    QJSValue callWithInstance(const QJSValue &instance, const QJSValueList &args = QJSValueList()) const;
    QJSValue callAsConstructor(const QJSValueList &args = QJSValueList()) const;
 
    ErrorType errorType() const;
 
private:
    friend class QJSValuePrivate;
    // force compile error, prevent QJSValue(bool) to be called
    QJSValue(void *) = delete;
 
    quint64 d;
};
 
#ifndef QT_NO_DATASTREAM
Q_QML_EXPORT QDataStream &operator<<(QDataStream &, const QJSValue &);
Q_QML_EXPORT QDataStream &operator>>(QDataStream &, QJSValue &);
#endif
 
QT_END_NAMESPACE
 
Q_DECLARE_METATYPE(QJSValue)
 
#endif