/*
 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
 * Copyright (C) 2013 Intel Corporation. All rights reserved.
 *
 * Portions are Copyright (C) 1998 Netscape Communications Corporation.
 *
 * Other contributors:
 *   Robert O'Callahan <roc+@cs.cmu.edu>
 *   David Baron <dbaron@fas.harvard.edu>
 *   Christian Biesinger <cbiesinger@web.de>
 *   Randall Jesup <rjesup@wgate.com>
 *   Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
 *   Josh Soref <timeless@mac.com>
 *   Boris Zbarsky <bzbarsky@mit.edu>
 *
 * 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 2.1 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
 *
 * Alternatively, the contents of this file may be used under the terms
 * of either the Mozilla Public License Version 1.1, found at
 * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
 * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
 * (the "GPL"), in which case the provisions of the MPL or the GPL are
 * applicable instead of those above.  If you wish to allow use of your
 * version of this file only under the terms of one of those two
 * licenses (the MPL or the GPL) and not to allow others to use your
 * version of this file under the LGPL, indicate your decision by
 * deletingthe provisions above and replace them with the notice and
 * other provisions required by the MPL or the GPL, as the case may be.
 * If you do not delete the provisions above, a recipient may use your
 * version of this file under any of the LGPL, the MPL or the GPL.
 */

#ifndef RenderLayerRepainter_h
#define RenderLayerRepainter_h

#include "platform/geometry/LayoutRect.h"
#include "wtf/Noncopyable.h"

namespace WebCore {

enum RepaintStatus {
    NeedsNormalRepaint = 0,
    NeedsFullRepaint = 1 << 0,
    NeedsFullRepaintForPositionedMovementLayout = 1 << 1
};

class RenderGeometryMap;
class RenderLayer;
class RenderLayerModelObject;

class RenderLayerRepainter {
    WTF_MAKE_NONCOPYABLE(RenderLayerRepainter);
public:
    RenderLayerRepainter(RenderLayerModelObject*);

    // Return a cached repaint rect, computed relative to the layer renderer's containerForRepaint.
    LayoutRect repaintRect() const { return m_repaintRect; }
    LayoutRect repaintRectIncludingNonCompositingDescendants() const;

    void repaintAfterLayout(RenderGeometryMap*, bool shouldCheckForRepaint);
    void repaintIncludingNonCompositingDescendants(RenderLayerModelObject* repaintContainer);
    void repaintIncludingDescendants();

    void setRepaintStatus(RepaintStatus status) { m_repaintStatus = status; }

    void computeRepaintRects(const RenderLayerModelObject* repaintContainer, const RenderGeometryMap* = 0);
    void computeRepaintRectsIncludingDescendants();

    // Indicate that the layer contents need to be repainted. Only has an effect
    // if layer compositing is being used,
    void setBackingNeedsRepaint();
    void setBackingNeedsRepaintInRect(const LayoutRect&); // r is in the coordinate space of the layer's render object

    void setFilterBackendNeedsRepaintingInRect(const LayoutRect&);

private:
    bool shouldRepaintAfterLayout() const;

    void clearRepaintRects();

    RenderLayer* enclosingFilterRepaintLayer() const;

    RenderLayerModelObject* m_renderer;

    unsigned m_repaintStatus; // RepaintStatus

    LayoutRect m_repaintRect; // Cached repaint rects. Used by layout.
    LayoutRect m_outlineBox;
};

} // namespace WebCore

#endif // RenderLayerRepainter_h