blob: ba1dab0ff1d83679adb797df53608588ac1dd10b [file] [log] [blame]
/*
* Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
* Copyright (C) 2018-2019 Apple Inc. 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
* 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"
#include "SVGStopElement.h"
#include "Document.h"
#include "RenderSVGGradientStop.h"
#include "RenderSVGResource.h"
#include "SVGGradientElement.h"
#include "SVGNames.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SVGStopElement);
inline SVGStopElement::SVGStopElement(const QualifiedName& tagName, Document& document)
: SVGElement(tagName, document)
{
ASSERT(hasTagName(SVGNames::stopTag));
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::offsetAttr, &SVGStopElement::m_offset>();
});
}
Ref<SVGStopElement> SVGStopElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGStopElement(tagName, document));
}
void SVGStopElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (name == SVGNames::offsetAttr) {
if (value.endsWith('%'))
m_offset->setBaseValInternal(value.string().left(value.length() - 1).toFloat() / 100.0f);
else
m_offset->setBaseValInternal(value.toFloat());
return;
}
SVGElement::parseAttribute(name, value);
}
void SVGStopElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (attrName == SVGNames::offsetAttr) {
if (auto renderer = this->renderer()) {
InstanceInvalidationGuard guard(*this);
RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
}
return;
}
SVGElement::svgAttributeChanged(attrName);
}
RenderPtr<RenderElement> SVGStopElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
return createRenderer<RenderSVGGradientStop>(*this, WTFMove(style));
}
bool SVGStopElement::rendererIsNeeded(const RenderStyle&)
{
return true;
}
Color SVGStopElement::stopColorIncludingOpacity() const
{
auto* style = renderer() ? &renderer()->style() : nullptr;
// FIXME: This check for null style exists to address Bug WK 90814, a rare crash condition in which the renderer or style is null.
if (!style)
return Color(Color::transparent, true);
const SVGRenderStyle& svgStyle = style->svgStyle();
float colorAlpha = svgStyle.stopColor().alpha() / 255.0;
// FIXME: This should use colorWithAlphaMultipliedBy() but that has different rounding of the alpha component.
return colorWithOverrideAlpha(svgStyle.stopColor().rgb(), colorAlpha * svgStyle.stopOpacity());
}
}