127 lines
4.3 KiB
C++
127 lines
4.3 KiB
C++
/*
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* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
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* Copyright (C) 2004, 2005, 2006 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 "SVGURIReference.h"
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#include "Document.h"
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#include "Element.h"
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#include "SVGElement.h"
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#include <wtf/URL.h>
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#include "XLinkNames.h"
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namespace WebCore {
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SVGURIReference::SVGURIReference(SVGElement* contextElement)
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: m_href(SVGAnimatedString::create(contextElement))
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{
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static std::once_flag onceFlag;
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std::call_once(onceFlag, [] {
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PropertyRegistry::registerProperty<SVGNames::hrefAttr, &SVGURIReference::m_href>();
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PropertyRegistry::registerProperty<XLinkNames::hrefAttr, &SVGURIReference::m_href>();
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});
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}
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bool SVGURIReference::isKnownAttribute(const QualifiedName& attributeName)
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{
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return PropertyRegistry::isKnownAttribute(attributeName);
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}
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SVGElement& SVGURIReference::contextElement() const
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{
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return *m_href->contextElement();
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}
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void SVGURIReference::parseAttribute(const QualifiedName& name, const AtomString& value)
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{
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if (name.matches(SVGNames::hrefAttr))
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m_href->setBaseValInternal(value.isNull() ? contextElement().getAttribute(XLinkNames::hrefAttr) : value);
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else if (name.matches(XLinkNames::hrefAttr) && !contextElement().hasAttribute(SVGNames::hrefAttr))
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m_href->setBaseValInternal(value);
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}
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String SVGURIReference::fragmentIdentifierFromIRIString(const String& url, const Document& document)
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{
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size_t start = url.find('#');
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if (start == notFound)
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return emptyString();
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if (!start)
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return url.substring(1);
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URL base = URL(document.baseURL(), url.substring(0, start));
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String fragmentIdentifier = url.substring(start);
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URL kurl(base, fragmentIdentifier);
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if (equalIgnoringFragmentIdentifier(kurl, document.url()))
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return fragmentIdentifier.substring(1);
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// The url doesn't have any fragment identifier.
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return emptyString();
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}
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auto SVGURIReference::targetElementFromIRIString(const String& iri, const TreeScope& treeScope, RefPtr<Document> externalDocument) -> TargetElementResult
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{
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// If there's no fragment identifier contained within the IRI string, we can't lookup an element.
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size_t startOfFragmentIdentifier = iri.find('#');
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if (startOfFragmentIdentifier == notFound)
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return { };
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// Exclude the '#' character when determining the fragmentIdentifier.
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auto id = iri.substring(startOfFragmentIdentifier + 1);
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if (id.isEmpty())
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return { };
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auto& document = treeScope.documentScope();
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auto url = document.completeURL(iri);
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if (externalDocument) {
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// Enforce that the referenced url matches the url of the document that we've loaded for it!
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ASSERT(equalIgnoringFragmentIdentifier(url, externalDocument->url()));
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return { externalDocument->getElementById(id), WTFMove(id) };
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}
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// Exit early if the referenced url is external, and we have no externalDocument given.
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if (isExternalURIReference(iri, document))
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return { nullptr, WTFMove(id) };
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return { treeScope.getElementById(id), WTFMove(id) };
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}
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bool SVGURIReference::haveLoadedRequiredResources() const
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{
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if (href().isEmpty() || !isExternalURIReference(href(), contextElement().document()))
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return true;
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return errorOccurred() || haveFiredLoadEvent();
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}
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void SVGURIReference::dispatchLoadEvent()
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{
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if (haveFiredLoadEvent())
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return;
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// Dispatch the load event
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setHaveFiredLoadEvent(true);
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ASSERT(contextElement().haveLoadedRequiredResources());
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contextElement().sendLoadEventIfPossible();
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}
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}
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