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/*
* Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
* Copyright (C) 2018-2019 Apple Inc. All rights reserved.
* Copyright (C) 2023 Igalia S.L.
*
* 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 "SVGGradientElement.h"
#include "ElementChildIteratorInlines.h"
#include "LegacyRenderSVGResourceLinearGradient.h"
#include "LegacyRenderSVGResourceRadialGradient.h"
#include "NodeName.h"
#include "RenderSVGResourceGradient.h"
#include "SVGElementTypeHelpers.h"
#include "SVGStopElement.h"
#include "SVGTransformable.h"
#include "StyleResolver.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(SVGGradientElement);
SVGGradientElement::SVGGradientElement(const QualifiedName& tagName, Document& document, UniqueRef<SVGPropertyRegistry>&& propertyRegistry)
: SVGElement(tagName, document, WTFMove(propertyRegistry))
, SVGURIReference(this)
{
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::spreadMethodAttr, SVGSpreadMethodType, &SVGGradientElement::m_spreadMethod>();
PropertyRegistry::registerProperty<SVGNames::gradientUnitsAttr, SVGUnitTypes::SVGUnitType, &SVGGradientElement::m_gradientUnits>();
PropertyRegistry::registerProperty<SVGNames::gradientTransformAttr, &SVGGradientElement::m_gradientTransform>();
});
}
void SVGGradientElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
switch (name.nodeName()) {
case AttributeNames::gradientUnitsAttr: {
auto propertyValue = SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString(newValue);
if (propertyValue > 0)
Ref { m_gradientUnits }->setBaseValInternal<SVGUnitTypes::SVGUnitType>(propertyValue);
break;
}
case AttributeNames::gradientTransformAttr:
Ref { m_gradientTransform }->baseVal()->parse(newValue);
break;
case AttributeNames::spreadMethodAttr: {
auto propertyValue = SVGPropertyTraits<SVGSpreadMethodType>::fromString(newValue);
if (propertyValue > 0)
Ref { m_spreadMethod }->setBaseValInternal<SVGSpreadMethodType>(propertyValue);
break;
}
default:
break;
}
SVGURIReference::parseAttribute(name, newValue);
SVGElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
}
void SVGGradientElement::invalidateGradientResource()
{
if (document().settings().layerBasedSVGEngineEnabled()) {
if (CheckedPtr gradientRenderer = dynamicDowncast<RenderSVGResourceGradient>(renderer()))
gradientRenderer->invalidateGradient();
return;
}
updateSVGRendererForElementChange();
}
void SVGGradientElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (PropertyRegistry::isKnownAttribute(attrName) || SVGURIReference::isKnownAttribute(attrName)) {
InstanceInvalidationGuard guard(*this);
invalidateGradientResource();
return;
}
SVGElement::svgAttributeChanged(attrName);
}
void SVGGradientElement::childrenChanged(const ChildChange& change)
{
SVGElement::childrenChanged(change);
if (change.source == ChildChange::Source::Parser)
return;
invalidateGradientResource();
}
GradientColorStops SVGGradientElement::buildStops()
{
GradientColorStops stops;
float previousOffset = 0.0f;
for (auto& stop : childrenOfType<SVGStopElement>(*this)) {
auto monotonicallyIncreasingOffset = std::clamp(stop.offset(), previousOffset, 1.0f);
previousOffset = monotonicallyIncreasingOffset;
stops.addColorStop({ monotonicallyIncreasingOffset, stop.stopColorIncludingOpacity() });
}
return stops;
}
}
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