blob: f1944447ddb6af3e0e9414fca8c68b18b1931cab [file] [log] [blame]
/*
* Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
* Copyright (C) 2018-2019 Apple Inc. 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 "SVGPathElement.h"
#include "LegacyRenderSVGPath.h"
#include "RenderSVGPath.h"
#include "RenderSVGResource.h"
#include "SVGDocumentExtensions.h"
#include "SVGElementTypeHelpers.h"
#include "SVGMPathElement.h"
#include "SVGNames.h"
#include "SVGPathUtilities.h"
#include "SVGPoint.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SVGPathElement);
inline SVGPathElement::SVGPathElement(const QualifiedName& tagName, Document& document)
: SVGGeometryElement(tagName, document)
{
ASSERT(hasTagName(SVGNames::pathTag));
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::dAttr, &SVGPathElement::m_pathSegList>();
});
}
Ref<SVGPathElement> SVGPathElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGPathElement(tagName, document));
}
void SVGPathElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == SVGNames::dAttr) {
if (!m_pathSegList->baseVal()->parse(value))
document().accessSVGExtensions().reportError("Problem parsing d=\"" + value + "\"");
return;
}
SVGGeometryElement::parseAttribute(name, value);
}
void SVGPathElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (PropertyRegistry::isKnownAttribute(attrName)) {
ASSERT(attrName == SVGNames::dAttr);
InstanceInvalidationGuard guard(*this);
invalidateMPathDependencies();
#if ENABLE(LAYER_BASED_SVG_ENGINE)
if (auto* renderer = this->renderer()) {
if (document().settings().layerBasedSVGEngineEnabled())
static_cast<RenderSVGPath*>(renderer)->setNeedsShapeUpdate();
else
static_cast<LegacyRenderSVGPath*>(renderer)->setNeedsShapeUpdate();
}
#else
if (auto* renderer = this->renderer())
static_cast<LegacyRenderSVGPath*>(renderer)->setNeedsShapeUpdate();
#endif
updateSVGRendererForElementChange();
return;
}
SVGGeometryElement::svgAttributeChanged(attrName);
}
void SVGPathElement::invalidateMPathDependencies()
{
// <mpath> can only reference <path> but this dependency is not handled in
// markForLayoutAndParentResourceInvalidation so we update any mpath dependencies manually.
for (auto& element : referencingElements()) {
if (is<SVGMPathElement>(element))
downcast<SVGMPathElement>(element.get()).targetPathChanged();
}
}
Node::InsertedIntoAncestorResult SVGPathElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
SVGGeometryElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
invalidateMPathDependencies();
return InsertedIntoAncestorResult::Done;
}
void SVGPathElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
SVGGeometryElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
invalidateMPathDependencies();
}
float SVGPathElement::getTotalLength() const
{
return getTotalLengthOfSVGPathByteStream(pathByteStream());
}
ExceptionOr<Ref<SVGPoint>> SVGPathElement::getPointAtLength(float distance) const
{
// Spec: Clamp distance to [0, length].
distance = clampTo<float>(distance, 0, getTotalLength());
// Spec: Return a newly created, detached SVGPoint object.
return SVGPoint::create(getPointAtLengthOfSVGPathByteStream(pathByteStream(), distance));
}
unsigned SVGPathElement::getPathSegAtLength(float length) const
{
return getSVGPathSegAtLengthFromSVGPathByteStream(pathByteStream(), length);
}
FloatRect SVGPathElement::getBBox(StyleUpdateStrategy styleUpdateStrategy)
{
if (styleUpdateStrategy == AllowStyleUpdate)
document().updateLayoutIgnorePendingStylesheets();
// FIXME: Eventually we should support getBBox for detached elements.
// FIXME: If the path is null it means we're calling getBBox() before laying out this element,
// which is an error.
#if ENABLE(LAYER_BASED_SVG_ENGINE)
if (is<RenderSVGPath>(renderer())) {
if (auto& pathRenderer = *downcast<RenderSVGPath>(renderer()); pathRenderer.hasPath())
return pathRenderer.path().boundingRect();
}
#endif
if (is<LegacyRenderSVGPath>(renderer())) {
if (auto& pathRenderer = *downcast<LegacyRenderSVGPath>(renderer()); pathRenderer.hasPath())
return pathRenderer.path().boundingRect();
}
return { };
}
RenderPtr<RenderElement> SVGPathElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
#if ENABLE(LAYER_BASED_SVG_ENGINE)
if (document().settings().layerBasedSVGEngineEnabled())
return createRenderer<RenderSVGPath>(*this, WTFMove(style));
#endif
return createRenderer<LegacyRenderSVGPath>(*this, WTFMove(style));
}
}