/*

    Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>

                  2004, 2005, 2007 Rob Buis <buis@kde.org>

                  2007 Eric Seidel <eric@webkit.org>

                  2009 Google, Inc.

    Copyright (C) Research In Motion Limited 2009-2010. 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

    aint 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.

*/

#include "config.h"

#if ENABLE(SVG)

#include "RenderSVGViewportContainer.h"

#include "GraphicsContext.h"

#include "RenderView.h"

#include "SVGSVGElement.h"

namespace WebCore {

RenderSVGViewportContainer::RenderSVGViewportContainer(SVGStyledElement* node)

    : RenderSVGContainer(node)

{

}

void RenderSVGViewportContainer::applyViewportClip(PaintInfo& paintInfo)

{

    if (SVGRenderSupport::isOverflowHidden(this))

        paintInfo.context->clip(m_viewport);

}

void RenderSVGViewportContainer::calcViewport()

{

     SVGElement* element = static_cast<SVGElement*>(node());

     if (element->hasTagName(SVGNames::svgTag)) {

         SVGSVGElement* svg = static_cast<SVGSVGElement*>(element);

         m_viewport = FloatRect(svg->x().value(svg)

                                , svg->y().value(svg)

                                , svg->width().value(svg)

                                , svg->height().value(svg));

    }

}

AffineTransform RenderSVGViewportContainer::viewportTransform() const

{

    if (node()->hasTagName(SVGNames::svgTag)) {

        SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());

        return svg->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());

    }

    return AffineTransform();

}

const AffineTransform& RenderSVGViewportContainer::localToParentTransform() const

{

    AffineTransform viewportTranslation(viewportTransform());

    m_localToParentTransform = viewportTranslation.translateRight(m_viewport.x(), m_viewport.y());

    return m_localToParentTransform;

    // If this class were ever given a localTransform(), then the above would read:

    // return viewportTransform() * localTransform() * viewportTranslation;

}

bool RenderSVGViewportContainer::pointIsInsideViewportClip(const FloatPoint& pointInParent)

{

    // Respect the viewport clip (which is in parent coords)

    if (!SVGRenderSupport::isOverflowHidden(this))

        return true;

    return m_viewport.contains(pointInParent);

}

}

#endif // ENABLE(SVG)