/*
 * 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 "wtf/Platform.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::setStyle(RenderStyle *style)
{
    RenderObject::setStyle(style);

    // <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()) {
        if (SVGResource *resource = gradient->canvasResource()) {
            resource->invalidate();
        }
    }
}

void RenderSVGGradientStop::layout()
{
    setNeedsLayout(false);
}

SVGGradientElement *RenderSVGGradientStop::gradientElement() const
{
    Node *parentNode = element()->parent();
    if (parentNode->hasTagName(linearGradientTag) || parentNode->hasTagName(radialGradientTag)) {
        return static_cast<SVGGradientElement *>(parentNode);
    }
    return 0;
}

}

#endif // ENABLE(SVG)
