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/*
Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
This file is part of the KDE project
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 "SVGRadialGradientElement.h"
#include "FloatConversion.h"
#include "FloatPoint.h"
#include "RadialGradientAttributes.h"
#include "RenderObject.h"
#include "SVGLength.h"
#include "SVGNames.h"
#include "SVGPaintServerRadialGradient.h"
#include "SVGStopElement.h"
#include "SVGTransform.h"
#include "SVGTransformList.h"
#include "SVGUnitTypes.h"
namespace WebCore {
SVGRadialGradientElement::SVGRadialGradientElement(const QualifiedName& tagName, Document* doc)
: SVGGradientElement(tagName, doc)
, m_cx(this, LengthModeWidth)
, m_cy(this, LengthModeHeight)
, m_r(this, LengthModeOther)
, m_fx(this, LengthModeWidth)
, m_fy(this, LengthModeHeight)
{
// Spec: If the attribute is not specified, the effect is as if a value of "50%" were specified.
setCxBaseValue(SVGLength(this, LengthModeWidth, "50%"));
setCyBaseValue(SVGLength(this, LengthModeHeight, "50%"));
setRBaseValue(SVGLength(this, LengthModeOther, "50%"));
}
SVGRadialGradientElement::~SVGRadialGradientElement()
{
}
ANIMATED_PROPERTY_DEFINITIONS(SVGRadialGradientElement, SVGLength, Length, length, Cx, cx, SVGNames::cxAttr, m_cx)
ANIMATED_PROPERTY_DEFINITIONS(SVGRadialGradientElement, SVGLength, Length, length, Cy, cy, SVGNames::cyAttr, m_cy)
ANIMATED_PROPERTY_DEFINITIONS(SVGRadialGradientElement, SVGLength, Length, length, Fx, fx, SVGNames::fxAttr, m_fx)
ANIMATED_PROPERTY_DEFINITIONS(SVGRadialGradientElement, SVGLength, Length, length, Fy, fy, SVGNames::fyAttr, m_fy)
ANIMATED_PROPERTY_DEFINITIONS(SVGRadialGradientElement, SVGLength, Length, length, R, r, SVGNames::rAttr, m_r)
void SVGRadialGradientElement::parseMappedAttribute(MappedAttribute* attr)
{
if (attr->name() == SVGNames::cxAttr)
setCxBaseValue(SVGLength(this, LengthModeWidth, attr->value()));
else if (attr->name() == SVGNames::cyAttr)
setCyBaseValue(SVGLength(this, LengthModeHeight, attr->value()));
else if (attr->name() == SVGNames::rAttr) {
setRBaseValue(SVGLength(this, LengthModeOther, attr->value()));
if (r().value() < 0.0)
document()->accessSVGExtensions()->reportError("A negative value for radial gradient radius <r> is not allowed");
} else if (attr->name() == SVGNames::fxAttr)
setFxBaseValue(SVGLength(this, LengthModeWidth, attr->value()));
else if (attr->name() == SVGNames::fyAttr)
setFyBaseValue(SVGLength(this, LengthModeHeight, attr->value()));
else
SVGGradientElement::parseMappedAttribute(attr);
}
void SVGRadialGradientElement::svgAttributeChanged(const QualifiedName& attrName)
{
SVGGradientElement::svgAttributeChanged(attrName);
if (!m_resource)
return;
if (attrName == SVGNames::cxAttr || attrName == SVGNames::cyAttr ||
attrName == SVGNames::fyAttr || attrName == SVGNames::fyAttr ||
attrName == SVGNames::rAttr)
m_resource->invalidate();
}
void SVGRadialGradientElement::buildGradient() const
{
RadialGradientAttributes attributes = collectGradientProperties();
// If we didn't find any gradient containing stop elements, ignore the request.
if (attributes.stops().isEmpty())
return;
RefPtr<SVGPaintServerRadialGradient> radialGradient = WTF::static_pointer_cast<SVGPaintServerRadialGradient>(m_resource);
radialGradient->setGradientStops(attributes.stops());
radialGradient->setBoundingBoxMode(attributes.boundingBoxMode());
radialGradient->setGradientSpreadMethod(attributes.spreadMethod());
radialGradient->setGradientTransform(attributes.gradientTransform());
radialGradient->setGradientCenter(FloatPoint::narrowPrecision(attributes.cx(), attributes.cy()));
radialGradient->setGradientFocal(FloatPoint::narrowPrecision(attributes.fx(), attributes.fy()));
radialGradient->setGradientRadius(narrowPrecisionToFloat(attributes.r()));
}
RadialGradientAttributes SVGRadialGradientElement::collectGradientProperties() const
{
RadialGradientAttributes attributes;
HashSet<const SVGGradientElement*> processedGradients;
bool isRadial = true;
const SVGGradientElement* current = this;
while (current) {
if (!attributes.hasSpreadMethod() && current->hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod((SVGGradientSpreadMethod) current->spreadMethod());
if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setBoundingBoxMode(current->getAttribute(SVGNames::gradientUnitsAttr) == "objectBoundingBox");
if (!attributes.hasGradientTransform() && current->hasAttribute(SVGNames::gradientTransformAttr))
attributes.setGradientTransform(current->gradientTransform()->consolidate().matrix());
if (!attributes.hasStops()) {
const Vector<SVGGradientStop>& stops(current->buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isRadial) {
const SVGRadialGradientElement* radial = static_cast<const SVGRadialGradientElement*>(current);
if (!attributes.hasCx() && current->hasAttribute(SVGNames::cxAttr))
attributes.setCx(radial->cx().valueAsPercentage());
if (!attributes.hasCy() && current->hasAttribute(SVGNames::cyAttr))
attributes.setCy(radial->cy().valueAsPercentage());
if (!attributes.hasR() && current->hasAttribute(SVGNames::rAttr))
attributes.setR(radial->r().valueAsPercentage());
if (!attributes.hasFx() && current->hasAttribute(SVGNames::fxAttr))
attributes.setFx(radial->fx().valueAsPercentage());
if (!attributes.hasFy() && current->hasAttribute(SVGNames::fyAttr))
attributes.setFy(radial->fy().valueAsPercentage());
}
processedGradients.add(current);
// Respect xlink:href, take attributes from referenced element
Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href()));
if (refNode && (refNode->hasTagName(SVGNames::radialGradientTag) || refNode->hasTagName(SVGNames::linearGradientTag))) {
current = static_cast<const SVGGradientElement*>(const_cast<const Node*>(refNode));
// Cycle detection
if (processedGradients.contains(current))
return RadialGradientAttributes();
isRadial = current->gradientType() == RadialGradientPaintServer;
} else
current = 0;
}
// Handle default values for fx/fy
if (!attributes.hasFx())
attributes.setFx(attributes.cx());
if (!attributes.hasFy())
attributes.setFy(attributes.cy());
return attributes;
}
}
#endif // ENABLE(SVG)
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