/*

 * This file is part of the WebKit project.

 *

 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>

 *

 * 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 "RenderSVGGradientStop.h"

#include "SVGGradientElement.h"

#include "SVGNames.h"

#include "SVGStopElement.h"

namespace WebCore {

using namespace SVGNames;

RenderSVGGradientStop::RenderSVGGradientStop(SVGStopElement* element)

    : RenderObject(element)

{

}

RenderSVGGradientStop::~RenderSVGGradientStop()

{

}

void RenderSVGGradientStop::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)

{

    RenderObject::styleDidChange(diff, oldStyle);

    // <stop> elements should only be allowed to make renderers under gradient elements

    // but I can imagine a few cases we might not be catching, so let's not crash if our parent isn't a gradient.

    if (SVGGradientElement* gradient = gradientElement())

        gradient->invalidateResourceClients();

}

void RenderSVGGradientStop::layout()

{

    setNeedsLayout(false);

}

SVGGradientElement* RenderSVGGradientStop::gradientElement() const

{

    Node* parentNode = node()->parent();

    if (parentNode->hasTagName(linearGradientTag) || parentNode->hasTagName(radialGradientTag))

        return static_cast<SVGGradientElement*>(parentNode);

    return 0;

}

}

#endif // ENABLE(SVG)