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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) 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008 Dirk Schulze <krit@webkit.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"
#if ENABLE(SVG)
#include "SVGLinearGradientElement.h"
#include "Attribute.h"
#include "Document.h"
#include "FloatPoint.h"
#include "LinearGradientAttributes.h"
#include "RenderSVGResourceLinearGradient.h"
#include "SVGElementInstance.h"
#include "SVGLength.h"
#include "SVGNames.h"
#include "SVGTransform.h"
#include "SVGTransformList.h"
#include "SVGUnitTypes.h"
namespace WebCore {
// Animated property definitions
DEFINE_ANIMATED_LENGTH(SVGLinearGradientElement, SVGNames::x1Attr, X1, x1)
DEFINE_ANIMATED_LENGTH(SVGLinearGradientElement, SVGNames::y1Attr, Y1, y1)
DEFINE_ANIMATED_LENGTH(SVGLinearGradientElement, SVGNames::x2Attr, X2, x2)
DEFINE_ANIMATED_LENGTH(SVGLinearGradientElement, SVGNames::y2Attr, Y2, y2)
BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGLinearGradientElement)
REGISTER_LOCAL_ANIMATED_PROPERTY(x1)
REGISTER_LOCAL_ANIMATED_PROPERTY(y1)
REGISTER_LOCAL_ANIMATED_PROPERTY(x2)
REGISTER_LOCAL_ANIMATED_PROPERTY(y2)
REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGradientElement)
END_REGISTER_ANIMATED_PROPERTIES
inline SVGLinearGradientElement::SVGLinearGradientElement(const QualifiedName& tagName, Document* document)
: SVGGradientElement(tagName, document)
, m_x1(LengthModeWidth)
, m_y1(LengthModeHeight)
, m_x2(LengthModeWidth, "100%")
, m_y2(LengthModeHeight)
{
// Spec: If the x2 attribute is not specified, the effect is as if a value of "100%" were specified.
ASSERT(hasTagName(SVGNames::linearGradientTag));
registerAnimatedPropertiesForSVGLinearGradientElement();
}
PassRefPtr<SVGLinearGradientElement> SVGLinearGradientElement::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new SVGLinearGradientElement(tagName, document));
}
bool SVGLinearGradientElement::isSupportedAttribute(const QualifiedName& attrName)
{
DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
if (supportedAttributes.isEmpty()) {
supportedAttributes.add(SVGNames::x1Attr);
supportedAttributes.add(SVGNames::x2Attr);
supportedAttributes.add(SVGNames::y1Attr);
supportedAttributes.add(SVGNames::y2Attr);
}
return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
}
void SVGLinearGradientElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
SVGParsingError parseError = NoError;
if (!isSupportedAttribute(name))
SVGGradientElement::parseAttribute(name, value);
else if (name == SVGNames::x1Attr)
setX1BaseValue(SVGLength::construct(LengthModeWidth, value, parseError));
else if (name == SVGNames::y1Attr)
setY1BaseValue(SVGLength::construct(LengthModeHeight, value, parseError));
else if (name == SVGNames::x2Attr)
setX2BaseValue(SVGLength::construct(LengthModeWidth, value, parseError));
else if (name == SVGNames::y2Attr)
setY2BaseValue(SVGLength::construct(LengthModeHeight, value, parseError));
else
ASSERT_NOT_REACHED();
reportAttributeParsingError(parseError, name, value);
}
void SVGLinearGradientElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (!isSupportedAttribute(attrName)) {
SVGGradientElement::svgAttributeChanged(attrName);
return;
}
SVGElementInstance::InvalidationGuard invalidationGuard(this);
updateRelativeLengthsInformation();
if (RenderObject* object = renderer())
object->setNeedsLayout(true);
}
RenderObject* SVGLinearGradientElement::createRenderer(RenderArena* arena, RenderStyle*)
{
return new (arena) RenderSVGResourceLinearGradient(this);
}
bool SVGLinearGradientElement::collectGradientAttributes(LinearGradientAttributes& attributes)
{
HashSet<SVGGradientElement*> processedGradients;
bool isLinear = true;
SVGGradientElement* current = this;
while (current) {
if (!current->renderer())
return false;
if (!attributes.hasSpreadMethod() && current->hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod(current->spreadMethod());
if (!attributes.hasGradientUnits() && current->hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setGradientUnits(current->gradientUnits());
if (!attributes.hasGradientTransform() && current->hasAttribute(SVGNames::gradientTransformAttr)) {
AffineTransform transform;
current->gradientTransform().concatenate(transform);
attributes.setGradientTransform(transform);
}
if (!attributes.hasStops()) {
const Vector<Gradient::ColorStop>& stops(current->buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isLinear) {
SVGLinearGradientElement* linear = static_cast<SVGLinearGradientElement*>(current);
if (!attributes.hasX1() && current->hasAttribute(SVGNames::x1Attr))
attributes.setX1(linear->x1());
if (!attributes.hasY1() && current->hasAttribute(SVGNames::y1Attr))
attributes.setY1(linear->y1());
if (!attributes.hasX2() && current->hasAttribute(SVGNames::x2Attr))
attributes.setX2(linear->x2());
if (!attributes.hasY2() && current->hasAttribute(SVGNames::y2Attr))
attributes.setY2(linear->y2());
}
processedGradients.add(current);
// Respect xlink:href, take attributes from referenced element
Node* refNode = SVGURIReference::targetElementFromIRIString(current->href(), document());
if (refNode && (refNode->hasTagName(SVGNames::linearGradientTag) || refNode->hasTagName(SVGNames::radialGradientTag))) {
current = toSVGGradientElement(refNode);
// Cycle detection
if (processedGradients.contains(current)) {
current = 0;
break;
}
isLinear = current->hasTagName(SVGNames::linearGradientTag);
} else
current = 0;
}
return true;
}
bool SVGLinearGradientElement::selfHasRelativeLengths() const
{
return x1().isRelative()
|| y1().isRelative()
|| x2().isRelative()
|| y2().isRelative();
}
}
#endif // ENABLE(SVG)
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