/*

 *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)

 *  Copyright (C) 2007, 2008 Apple Inc. All rights reserved.

 *

 *  This library is free software; you can redistribute it and/or

 *  modify it under the terms of the GNU Lesser General Public

 *  License as published by the Free Software Foundation; either

 *  version 2 of the License, or (at your option) any later version.

 *

 *  This library is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 *  Lesser General Public License for more details.

 *

 *  You should have received a copy of the GNU Lesser General Public

 *  License along with this library; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 */

#ifndef StringObjectThatMasqueradesAsUndefined_h

#define StringObjectThatMasqueradesAsUndefined_h

#include "JSGlobalObject.h"

#include "StringObject.h"

#include "UString.h"

namespace JSC {

    // WebCore uses this to make style.filter undetectable

    class StringObjectThatMasqueradesAsUndefined : public StringObject {

    public:

        static StringObjectThatMasqueradesAsUndefined* create(ExecState* exec, const UString& string)

        {

            return new (exec) StringObjectThatMasqueradesAsUndefined(exec,

                createStructure(exec->lexicalGlobalObject()->stringPrototype()), string);

        }

    private:

        StringObjectThatMasqueradesAsUndefined(ExecState* exec, NonNullPassRefPtr<Structure> structure, const UString& string)

            : StringObject(exec, structure, string)

        {

        }

        static PassRefPtr<Structure> createStructure(JSValue proto) 

        { 

            return Structure::create(proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount); 

        }

        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | MasqueradesAsUndefined | OverridesGetPropertyNames | StringObject::StructureFlags;

        virtual bool toBoolean(ExecState*) const { return false; }

    };

} // namespace JSC

#endif // StringObjectThatMasqueradesAsUndefined_h