146 lines
4.9 KiB
C++
146 lines
4.9 KiB
C++
/*
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* Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
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* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
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* Copyright (C) 2018-2019 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "SVGPathElement.h"
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#include "RenderSVGPath.h"
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#include "RenderSVGResource.h"
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#include "SVGDocumentExtensions.h"
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#include "SVGMPathElement.h"
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#include "SVGNames.h"
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#include "SVGPathUtilities.h"
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#include "SVGPoint.h"
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(SVGPathElement);
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inline SVGPathElement::SVGPathElement(const QualifiedName& tagName, Document& document)
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: SVGGeometryElement(tagName, document)
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{
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ASSERT(hasTagName(SVGNames::pathTag));
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static std::once_flag onceFlag;
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std::call_once(onceFlag, [] {
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PropertyRegistry::registerProperty<SVGNames::dAttr, &SVGPathElement::m_pathSegList>();
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});
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}
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Ref<SVGPathElement> SVGPathElement::create(const QualifiedName& tagName, Document& document)
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{
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return adoptRef(*new SVGPathElement(tagName, document));
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}
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void SVGPathElement::parseAttribute(const QualifiedName& name, const AtomString& value)
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{
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if (name == SVGNames::dAttr) {
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if (!m_pathSegList->baseVal()->parse(value))
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document().accessSVGExtensions().reportError("Problem parsing d=\"" + value + "\"");
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return;
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}
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SVGGeometryElement::parseAttribute(name, value);
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}
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void SVGPathElement::svgAttributeChanged(const QualifiedName& attrName)
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{
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if (attrName == SVGNames::dAttr) {
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InstanceInvalidationGuard guard(*this);
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invalidateMPathDependencies();
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if (auto* renderer = downcast<RenderSVGPath>(this->renderer())) {
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renderer->setNeedsShapeUpdate();
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RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
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}
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return;
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}
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SVGGeometryElement::svgAttributeChanged(attrName);
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}
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void SVGPathElement::invalidateMPathDependencies()
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{
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// <mpath> can only reference <path> but this dependency is not handled in
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// markForLayoutAndParentResourceInvalidation so we update any mpath dependencies manually.
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for (auto& element : referencingElements()) {
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if (is<SVGMPathElement>(element))
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downcast<SVGMPathElement>(element.get()).targetPathChanged();
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}
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}
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Node::InsertedIntoAncestorResult SVGPathElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
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{
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SVGGeometryElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
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invalidateMPathDependencies();
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return InsertedIntoAncestorResult::Done;
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}
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void SVGPathElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
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{
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SVGGeometryElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
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invalidateMPathDependencies();
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}
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float SVGPathElement::getTotalLength() const
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{
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return getTotalLengthOfSVGPathByteStream(pathByteStream());
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}
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ExceptionOr<Ref<SVGPoint>> SVGPathElement::getPointAtLength(float distance) const
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{
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// Spec: Clamp distance to [0, length].
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distance = clampTo<float>(distance, 0, getTotalLength());
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// Spec: Return a newly created, detached SVGPoint object.
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return SVGPoint::create(getPointAtLengthOfSVGPathByteStream(pathByteStream(), distance));
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}
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unsigned SVGPathElement::getPathSegAtLength(float length) const
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{
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return getSVGPathSegAtLengthFromSVGPathByteStream(pathByteStream(), length);
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}
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FloatRect SVGPathElement::getBBox(StyleUpdateStrategy styleUpdateStrategy)
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{
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if (styleUpdateStrategy == AllowStyleUpdate)
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document().updateLayoutIgnorePendingStylesheets();
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RenderSVGPath* renderer = downcast<RenderSVGPath>(this->renderer());
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// FIXME: Eventually we should support getBBox for detached elements.
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// FIXME: If the path is null it means we're calling getBBox() before laying out this element,
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// which is an error.
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if (!renderer || !renderer->hasPath())
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return { };
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return renderer->path().boundingRect();
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}
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RenderPtr<RenderElement> SVGPathElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
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{
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return createRenderer<RenderSVGPath>(*this, WTFMove(style));
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}
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}
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