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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>
*
* 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 "core/svg/SVGPathElement.h"
#include "core/css/CSSIdentifierValue.h"
#include "core/dom/StyleChangeReason.h"
#include "core/layout/svg/LayoutSVGPath.h"
#include "core/svg/SVGMPathElement.h"
#include "core/svg/SVGPathQuery.h"
#include "core/svg/SVGPathUtilities.h"
#include "core/svg/SVGPointTearOff.h"
namespace blink {
inline SVGPathElement::SVGPathElement(Document& document)
: SVGGeometryElement(SVGNames::pathTag, document),
m_path(SVGAnimatedPath::create(this, SVGNames::dAttr, CSSPropertyD)) {
addToPropertyMap(m_path);
}
DEFINE_TRACE(SVGPathElement) {
visitor->trace(m_path);
SVGGeometryElement::trace(visitor);
}
DEFINE_NODE_FACTORY(SVGPathElement)
Path SVGPathElement::attributePath() const {
return m_path->currentValue()->stylePath()->path();
}
const StylePath* SVGPathElement::stylePath() const {
if (LayoutObject* layoutObject = this->layoutObject()) {
const StylePath* stylePath = layoutObject->styleRef().svgStyle().d();
if (stylePath)
return stylePath;
return StylePath::emptyPath();
}
return m_path->currentValue()->stylePath();
}
float SVGPathElement::computePathLength() const {
return stylePath()->length();
}
Path SVGPathElement::asPath() const {
return stylePath()->path();
}
float SVGPathElement::getTotalLength() {
document().updateStyleAndLayoutIgnorePendingStylesheets();
return SVGPathQuery(pathByteStream()).getTotalLength();
}
SVGPointTearOff* SVGPathElement::getPointAtLength(float length) {
document().updateStyleAndLayoutIgnorePendingStylesheets();
FloatPoint point = SVGPathQuery(pathByteStream()).getPointAtLength(length);
return SVGPointTearOff::create(SVGPoint::create(point), 0,
PropertyIsNotAnimVal);
}
unsigned SVGPathElement::getPathSegAtLength(float length) {
document().updateStyleAndLayoutIgnorePendingStylesheets();
return SVGPathQuery(pathByteStream()).getPathSegIndexAtLength(length);
}
void SVGPathElement::svgAttributeChanged(const QualifiedName& attrName) {
if (attrName == SVGNames::dAttr) {
SVGElement::InvalidationGuard invalidationGuard(this);
invalidateSVGPresentationAttributeStyle();
setNeedsStyleRecalc(LocalStyleChange,
StyleChangeReasonForTracing::fromAttribute(attrName));
if (LayoutSVGShape* layoutPath = toLayoutSVGShape(this->layoutObject()))
layoutPath->setNeedsShapeUpdate();
invalidateMPathDependencies();
if (layoutObject())
markForLayoutAndParentResourceInvalidation(layoutObject());
return;
}
if (attrName == SVGNames::pathLengthAttr) {
SVGElement::InvalidationGuard invalidationGuard(this);
if (layoutObject())
markForLayoutAndParentResourceInvalidation(layoutObject());
return;
}
SVGGeometryElement::svgAttributeChanged(attrName);
}
void SVGPathElement::collectStyleForPresentationAttribute(
const QualifiedName& name,
const AtomicString& value,
MutableStylePropertySet* style) {
SVGAnimatedPropertyBase* property = propertyFromAttribute(name);
if (property == m_path) {
SVGAnimatedPath* path = this->path();
// If this is a <use> instance, return the referenced path to maximize
// geometry sharing.
if (const SVGElement* element = correspondingElement())
path = toSVGPathElement(element)->path();
CSSPathValue* pathValue = path->currentValue()->pathValue();
if (pathValue->stylePath()->byteStream().isEmpty()) {
addPropertyToPresentationAttributeStyle(
style, CSSPropertyD, CSSIdentifierValue::create(CSSValueNone));
return;
}
addPropertyToPresentationAttributeStyle(style, CSSPropertyD, pathValue);
return;
}
SVGGeometryElement::collectStyleForPresentationAttribute(name, value, style);
}
void SVGPathElement::invalidateMPathDependencies() {
// <mpath> can only reference <path> but this dependency is not handled in
// markForLayoutAndParentResourceInvalidation so we update any mpath
// dependencies manually.
if (SVGElementSet* dependencies = setOfIncomingReferences()) {
for (SVGElement* element : *dependencies) {
if (isSVGMPathElement(*element))
toSVGMPathElement(element)->targetPathChanged();
}
}
}
Node::InsertionNotificationRequest SVGPathElement::insertedInto(
ContainerNode* rootParent) {
SVGGeometryElement::insertedInto(rootParent);
invalidateMPathDependencies();
return InsertionDone;
}
void SVGPathElement::removedFrom(ContainerNode* rootParent) {
SVGGeometryElement::removedFrom(rootParent);
invalidateMPathDependencies();
}
FloatRect SVGPathElement::getBBox() {
document().updateStyleAndLayoutIgnorePendingStylesheets();
// We want the exact bounds.
return SVGPathElement::asPath().boundingRect(Path::BoundsType::Exact);
}
} // namespace blink
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