/*

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

                  2004, 2005, 2006 Rob Buis <buis@kde.org>

                  2009 Google, Inc.

    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.

 */

#include "config.h"

#if ENABLE(SVG)

#include "RenderSVGTransformableContainer.h"

#include "SVGShadowTreeElements.h"

#include "SVGStyledTransformableElement.h"

namespace WebCore {

RenderSVGTransformableContainer::RenderSVGTransformableContainer(SVGStyledTransformableElement* node)

    : RenderSVGContainer(node)

    , m_needsTransformUpdate(true)

{

}

void RenderSVGTransformableContainer::calculateLocalTransform()

{

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

    bool needsUpdate = m_needsTransformUpdate;

    if (needsUpdate) {

        m_localTransform = element->animatedLocalTransform();

        m_needsTransformUpdate = false;

    }

    if (!element->hasTagName(SVGNames::gTag) || !static_cast<SVGGElement*>(element)->isShadowTreeContainerElement())

        return;

    FloatSize translation = static_cast<SVGShadowTreeContainerElement*>(element)->containerTranslation();

    if (translation.width() == 0 && translation.height() == 0)

        return;

    // FIXME: Could optimize this case for use to avoid refetching the animatedLocalTransform() here, if only the containerTranslation() changed.

    if (!needsUpdate)

        m_localTransform = element->animatedLocalTransform();

    m_localTransform.translate(translation.width(), translation.height());

}

}

#endif // ENABLE(SVG)