/*

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

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef LayoutState_h

#define LayoutState_h

#include "IntRect.h"

#include "IntSize.h"

#include <wtf/Noncopyable.h>

namespace WebCore {

class RenderArena;

class RenderBox;

class RenderObject;

class LayoutState : Noncopyable {

public:

    LayoutState()

        : m_clipped(false)

        , m_next(0)

    {

    }

    LayoutState(LayoutState*, RenderBox*, const IntSize& offset);

    LayoutState(RenderObject*);

    void destroy(RenderArena*);

    // Overloaded new operator.

    void* operator new(size_t, RenderArena*) throw();

    // Overridden to prevent the normal delete from being called.

    void operator delete(void*, size_t);

private:

    // The normal operator new is disallowed.

    void* operator new(size_t) throw();

public:

    bool m_clipped;

    IntRect m_clipRect;

    IntSize m_offset;

    LayoutState* m_next;

};

} // namespace WebCore

#endif // LayoutState_h