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****************************************************************************/

#ifndef QV8CONTEXTWRAPPER_P_H
#define QV8CONTEXTWRAPPER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qglobal.h>
#include <private/qv8_p.h>

QT_BEGIN_NAMESPACE

class QUrl;
class QObject;
class QV8Engine;
class QDeclarativeContextData;
class QV8ContextWrapper 
{
public:
    QV8ContextWrapper();
    ~QV8ContextWrapper();

    void init(QV8Engine *);
    void destroy();

    v8::Local<v8::Object> qmlScope(QDeclarativeContextData *ctxt, QObject *scope);
    v8::Local<v8::Object> urlScope(const QUrl &);

    void setReadOnly(v8::Handle<v8::Object>, bool);

    void addSubContext(v8::Handle<v8::Object> qmlglobal, v8::Handle<v8::Script>, 
                       QDeclarativeContextData *ctxt);

    // XXX We only use the secondary scope to pass the "arguments" of the signal to
    // on<SignalName> properties.  Instead of doing this we should rewrite the 
    // JavaScript closure function to accept these arguments as named parameters.
    // To keep backwards compatibility we have to check that the argument names are
    // not members of the QV8Engine::illegalNames() set.
    QObject *setSecondaryScope(v8::Handle<v8::Object>, QObject *);

    QDeclarativeContextData *callingContext();
    QDeclarativeContextData *context(v8::Handle<v8::Value>);

    inline v8::Handle<v8::Object> sharedContext() const;

private:
    static v8::Handle<v8::Value> NullGetter(v8::Local<v8::String> property, 
                                            const v8::AccessorInfo &info);
    static v8::Handle<v8::Value> NullSetter(v8::Local<v8::String> property, 
                                            v8::Local<v8::Value> value,
                                            const v8::AccessorInfo &info);
    static v8::Handle<v8::Value> Getter(v8::Local<v8::String> property, 
                                        const v8::AccessorInfo &info);
    static v8::Handle<v8::Value> Setter(v8::Local<v8::String> property, 
                                        v8::Local<v8::Value> value,
                                        const v8::AccessorInfo &info);

    QV8Engine *m_engine;
    v8::Persistent<v8::Function> m_constructor;
    v8::Persistent<v8::Function> m_urlConstructor;
    v8::Persistent<v8::Object> m_sharedContext;
};

v8::Handle<v8::Object> QV8ContextWrapper::sharedContext() const
{
    return m_sharedContext;
}

QT_END_NAMESPACE

#endif // QV8CONTEXTWRAPPER_P_H