SVGLinearGradientElement.cpp [plain text]
#include "config.h"
#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"
#include <wtf/NeverDestroyed.h>
namespace WebCore {
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)
{
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)
{
static NeverDestroyed<HashSet<QualifiedName>> supportedAttributes;
if (supportedAttributes.get().isEmpty()) {
supportedAttributes.get().add(SVGNames::x1Attr);
supportedAttributes.get().add(SVGNames::x2Attr);
supportedAttributes.get().add(SVGNames::y1Attr);
supportedAttributes.get().add(SVGNames::y2Attr);
}
return supportedAttributes.get().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();
}
RenderPtr<RenderElement> SVGLinearGradientElement::createElementRenderer(PassRef<RenderStyle> style)
{
return createRenderer<RenderSVGResourceLinearGradient>(*this, WTF::move(style));
}
static void setGradientAttributes(SVGGradientElement& element, LinearGradientAttributes& attributes, bool isLinear = true)
{
if (!attributes.hasSpreadMethod() && element.hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod(element.spreadMethod());
if (!attributes.hasGradientUnits() && element.hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setGradientUnits(element.gradientUnits());
if (!attributes.hasGradientTransform() && element.hasAttribute(SVGNames::gradientTransformAttr)) {
AffineTransform transform;
element.gradientTransform().concatenate(transform);
attributes.setGradientTransform(transform);
}
if (!attributes.hasStops()) {
const Vector<Gradient::ColorStop>& stops(element.buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isLinear) {
SVGLinearGradientElement* linear = toSVGLinearGradientElement(&element);
if (!attributes.hasX1() && element.hasAttribute(SVGNames::x1Attr))
attributes.setX1(linear->x1());
if (!attributes.hasY1() && element.hasAttribute(SVGNames::y1Attr))
attributes.setY1(linear->y1());
if (!attributes.hasX2() && element.hasAttribute(SVGNames::x2Attr))
attributes.setX2(linear->x2());
if (!attributes.hasY2() && element.hasAttribute(SVGNames::y2Attr))
attributes.setY2(linear->y2());
}
}
bool SVGLinearGradientElement::collectGradientAttributes(LinearGradientAttributes& attributes)
{
if (!renderer())
return false;
HashSet<SVGGradientElement*> processedGradients;
SVGGradientElement* current = this;
setGradientAttributes(*current, attributes);
processedGradients.add(current);
while (true) {
Node* refNode = SVGURIReference::targetElementFromIRIString(current->href(), document());
if (refNode && isSVGGradientElement(*refNode)) {
current = toSVGGradientElement(refNode);
if (processedGradients.contains(current))
return true;
if (!current->renderer())
return false;
setGradientAttributes(*current, attributes, current->hasTagName(SVGNames::linearGradientTag));
processedGradients.add(current);
} else
return true;
}
ASSERT_NOT_REACHED();
return false;
}
bool SVGLinearGradientElement::selfHasRelativeLengths() const
{
return x1().isRelative()
|| y1().isRelative()
|| x2().isRelative()
|| y2().isRelative();
}
}