/*

 * 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 COMPUTER, 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 COMPUTER, 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.

 */

#include "config.h"

#include "History.h"

#include "Frame.h"

#include "FrameLoader.h"

namespace WebCore {

History::History(Frame* frame)

    : m_frame(frame)

{

}

Frame* History::frame() const

{

    return m_frame;

}

void History::disconnectFrame()

{

    m_frame = 0;

}

unsigned History::length() const

{

    if (!m_frame)

        return 0;

    if (!m_frame->page())

        return 0;

    return m_frame->page()->getHistoryLength();

}

void History::back()

{

    if (!m_frame)

        return;

    m_frame->redirectScheduler()->scheduleHistoryNavigation(-1);

}

void History::forward()

{

    if (!m_frame)

        return;

    m_frame->redirectScheduler()->scheduleHistoryNavigation(1);

}

void History::go(int distance)

{

    if (!m_frame)

        return;

    m_frame->redirectScheduler()->scheduleHistoryNavigation(distance);

}

} // namespace WebCore