/*

 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)

 *           (C) 2000 Antti Koivisto (koivisto@kde.org)

 *           (C) 2000 Dirk Mueller (mueller@kde.org)

 *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)

 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.

 *

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

 * modify it under the terms of the GNU Library 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

 * Library General Public License for more details.

 *

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

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 *

 */

#ifndef RenderSelectionInfo_h

#define RenderSelectionInfo_h

#include "IntRect.h"

#include "RenderBox.h"

namespace WebCore {

class RenderSelectionInfoBase : public Noncopyable {

public:

    RenderSelectionInfoBase()

        : m_object(0)

        , m_repaintContainer(0)

        , m_state(RenderObject::SelectionNone)

    {

    }

    RenderSelectionInfoBase(RenderObject* o)

        : m_object(o)

        , m_repaintContainer(o->containerForRepaint())

        , m_state(o->selectionState())

    {

    }

    RenderObject* object() const { return m_object; }

    RenderBoxModelObject* repaintContainer() const { return m_repaintContainer; }

    RenderObject::SelectionState state() const { return m_state; }

protected:

    RenderObject* m_object;

    RenderBoxModelObject* m_repaintContainer;

    RenderObject::SelectionState m_state;

};

// This struct is used when the selection changes to cache the old and new state of the selection for each RenderObject.

class RenderSelectionInfo : public RenderSelectionInfoBase {

public:

    RenderSelectionInfo(RenderObject* o, bool clipToVisibleContent)

        : RenderSelectionInfoBase(o)

        , m_rect(o->needsLayout() ? IntRect() : o->selectionRectForRepaint(m_repaintContainer, clipToVisibleContent))

    {

    }

    void repaint()

    {

        m_object->repaintUsingContainer(m_repaintContainer, m_rect);

    }

    IntRect rect() const { return m_rect; }

private:

    IntRect m_rect; // relative to repaint container

};

// This struct is used when the selection changes to cache the old and new state of the selection for each RenderBlock.

class RenderBlockSelectionInfo : public RenderSelectionInfoBase {

public:

    RenderBlockSelectionInfo(RenderBlock* b)

        : RenderSelectionInfoBase(b)

        , m_rects(b->needsLayout() ? GapRects() : block()->selectionGapRectsForRepaint(m_repaintContainer))

    { 

    }

    void repaint()

    {

        m_object->repaintUsingContainer(m_repaintContainer, m_rects);

    }

    RenderBlock* block() const { return toRenderBlock(m_object); }

    GapRects rects() const { return m_rects; }

private:

    GapRects m_rects; // relative to repaint container

};

} // namespace WebCore

#endif // RenderSelectionInfo_h