/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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**
** This file is part of the QtScript module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** 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 QSCRIPTOBJECT_P_H
#define QSCRIPTOBJECT_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/qobjectdefs.h>

#include "JSObject.h"

QT_BEGIN_NAMESPACE

class QScriptObjectDelegate;

class QScriptObject : public JSC::JSObject
{
public:
     // work around CELL_SIZE limitation
    struct Data
    {
        JSC::JSValue data; // QScriptValue::data
        QScriptObjectDelegate *delegate;
        bool isMarking; // recursion guard

        Data() : delegate(0), isMarking(false) {}
        ~Data();
    };

    explicit QScriptObject(WTF::PassRefPtr<JSC::Structure> sid);
    virtual ~QScriptObject();

    virtual bool getOwnPropertySlot(JSC::ExecState*,
                                    const JSC::Identifier& propertyName,
                                    JSC::PropertySlot&);
    virtual bool getOwnPropertyDescriptor(JSC::ExecState*, const JSC::Identifier&, JSC::PropertyDescriptor&);
    virtual void put(JSC::ExecState* exec, const JSC::Identifier& propertyName,
                     JSC::JSValue, JSC::PutPropertySlot&);
    virtual bool deleteProperty(JSC::ExecState*,
                                const JSC::Identifier& propertyName);
    virtual void getOwnPropertyNames(JSC::ExecState*, JSC::PropertyNameArray&,
                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
    virtual void markChildren(JSC::MarkStack& markStack);
    virtual JSC::CallType getCallData(JSC::CallData&);
    virtual JSC::ConstructType getConstructData(JSC::ConstructData&);
    virtual bool hasInstance(JSC::ExecState*, JSC::JSValue value, JSC::JSValue proto);
    virtual bool compareToObject(JSC::ExecState*, JSC::JSObject*);

    virtual const JSC::ClassInfo* classInfo() const { return &info; }
    static const JSC::ClassInfo info;

    static WTF::PassRefPtr<JSC::Structure> createStructure(JSC::JSValue prototype)
    {
        return JSC::Structure::create(prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags));
    }

    inline JSC::JSValue data() const;
    inline void setData(JSC::JSValue data);

    inline QScriptObjectDelegate *delegate() const;
    inline void setDelegate(QScriptObjectDelegate *delegate);

protected:
    static const unsigned StructureFlags = JSC::ImplementsHasInstance | JSC::OverridesHasInstance | JSC::OverridesGetOwnPropertySlot | JSC::OverridesMarkChildren | JSC::OverridesGetPropertyNames | JSObject::StructureFlags;

    Data *d;
};

class QScriptObjectPrototype : public QScriptObject
{
public:
    QScriptObjectPrototype(JSC::ExecState*, WTF::PassRefPtr<JSC::Structure>,
                           JSC::Structure* prototypeFunctionStructure);
};

class QScriptObjectDelegate
{
public:
    enum Type {
        QtObject,
        Variant,
        ClassObject,
        DeclarativeClassObject
    };

    QScriptObjectDelegate();
    virtual ~QScriptObjectDelegate();

    virtual Type type() const = 0;

    virtual bool getOwnPropertySlot(QScriptObject*, JSC::ExecState*,
                                    const JSC::Identifier& propertyName,
                                    JSC::PropertySlot&);
    virtual bool getOwnPropertyDescriptor(QScriptObject*, JSC::ExecState*,
                                    const JSC::Identifier& propertyName,
                                    JSC::PropertyDescriptor&);
    virtual void put(QScriptObject*, JSC::ExecState* exec, const JSC::Identifier& propertyName,
                     JSC::JSValue, JSC::PutPropertySlot&);
    virtual bool deleteProperty(QScriptObject*, JSC::ExecState*,
                                const JSC::Identifier& propertyName);
    virtual void getOwnPropertyNames(QScriptObject*, JSC::ExecState*, JSC::PropertyNameArray&,
                                     JSC::EnumerationMode mode = JSC::ExcludeDontEnumProperties);
    virtual void markChildren(QScriptObject*, JSC::MarkStack& markStack);
    virtual JSC::CallType getCallData(QScriptObject*, JSC::CallData&);
    virtual JSC::ConstructType getConstructData(QScriptObject*, JSC::ConstructData&);
    virtual bool hasInstance(QScriptObject*, JSC::ExecState*,
                             JSC::JSValue value, JSC::JSValue proto);
    virtual bool compareToObject(QScriptObject*, JSC::ExecState*, JSC::JSObject*);

private:
    Q_DISABLE_COPY(QScriptObjectDelegate)
};

inline JSC::JSValue QScriptObject::data() const
{
    if (!d)
        return JSC::JSValue();
    return d->data;
}

inline void QScriptObject::setData(JSC::JSValue data)
{
    if (!d)
        d = new Data();
    d->data = data;
}

inline QScriptObjectDelegate *QScriptObject::delegate() const
{
    if (!d)
        return 0;
    return d->delegate;
}

inline void QScriptObject::setDelegate(QScriptObjectDelegate *delegate)
{
    if (!d)
        d = new Data();
    else
        delete d->delegate;
    d->delegate = delegate;
}

QT_END_NAMESPACE

#endif