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