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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.
*
* 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 "core/svg/SVGGradientElement.h"
#include "core/XLinkNames.h"
#include "core/dom/Attribute.h"
#include "core/dom/ElementTraversal.h"
#include "core/rendering/svg/RenderSVGPath.h"
#include "core/rendering/svg/RenderSVGResourceLinearGradient.h"
#include "core/rendering/svg/RenderSVGResourceRadialGradient.h"
#include "core/svg/SVGStopElement.h"
#include "core/svg/SVGTransformList.h"
namespace blink {
template<> const SVGEnumerationStringEntries& getStaticStringEntries<SVGSpreadMethodType>()
{
DEFINE_STATIC_LOCAL(SVGEnumerationStringEntries, entries, ());
if (entries.isEmpty()) {
entries.append(std::make_pair(SVGSpreadMethodPad, "pad"));
entries.append(std::make_pair(SVGSpreadMethodReflect, "reflect"));
entries.append(std::make_pair(SVGSpreadMethodRepeat, "repeat"));
}
return entries;
}
SVGGradientElement::SVGGradientElement(const QualifiedName& tagName, Document& document)
: SVGElement(tagName, document)
, SVGURIReference(this)
, m_gradientTransform(SVGAnimatedTransformList::create(this, SVGNames::gradientTransformAttr, SVGTransformList::create()))
, m_spreadMethod(SVGAnimatedEnumeration<SVGSpreadMethodType>::create(this, SVGNames::spreadMethodAttr, SVGSpreadMethodPad))
, m_gradientUnits(SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::create(this, SVGNames::gradientUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX))
{
addToPropertyMap(m_gradientTransform);
addToPropertyMap(m_spreadMethod);
addToPropertyMap(m_gradientUnits);
}
void SVGGradientElement::trace(Visitor* visitor)
{
visitor->trace(m_gradientTransform);
visitor->trace(m_spreadMethod);
visitor->trace(m_gradientUnits);
SVGElement::trace(visitor);
SVGURIReference::trace(visitor);
}
bool SVGGradientElement::isSupportedAttribute(const QualifiedName& attrName)
{
DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
if (supportedAttributes.isEmpty()) {
SVGURIReference::addSupportedAttributes(supportedAttributes);
supportedAttributes.add(SVGNames::gradientUnitsAttr);
supportedAttributes.add(SVGNames::gradientTransformAttr);
supportedAttributes.add(SVGNames::spreadMethodAttr);
}
return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
}
void SVGGradientElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
parseAttributeNew(name, value);
}
void SVGGradientElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (!isSupportedAttribute(attrName)) {
SVGElement::svgAttributeChanged(attrName);
return;
}
SVGElement::InvalidationGuard invalidationGuard(this);
RenderSVGResourceContainer* renderer = toRenderSVGResourceContainer(this->renderer());
if (renderer)
renderer->invalidateCacheAndMarkForLayout();
}
void SVGGradientElement::childrenChanged(const ChildrenChange& change)
{
SVGElement::childrenChanged(change);
if (change.byParser)
return;
if (RenderObject* object = renderer())
object->setNeedsLayoutAndFullPaintInvalidation();
}
Vector<Gradient::ColorStop> SVGGradientElement::buildStops()
{
Vector<Gradient::ColorStop> stops;
float previousOffset = 0.0f;
for (SVGStopElement* stop = Traversal<SVGStopElement>::firstChild(*this); stop; stop = Traversal<SVGStopElement>::nextSibling(*stop)) {
// Figure out right monotonic offset
float offset = stop->offset()->currentValue()->value();
offset = std::min(std::max(previousOffset, offset), 1.0f);
previousOffset = offset;
stops.append(Gradient::ColorStop(offset, stop->stopColorIncludingOpacity()));
}
return stops;
}
}
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