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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Peter Kelly (pmk@post.com)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2012 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 "Attr.h"
#include "AttributeChangeInvalidation.h"
#include "CommonAtomStrings.h"
#include "Document.h"
#include "ElementInlines.h"
#include "Event.h"
#include "HTMLNames.h"
#include "MutableStyleProperties.h"
#include "ScopedEventQueue.h"
#include "StyledElement.h"
#include "TextNodeTraversal.h"
#include "XMLNSNames.h"
#include <wtf/TZoneMallocInlines.h>
#include <wtf/text/AtomString.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(Attr);
using namespace HTMLNames;
Attr::Attr(Element& element, const QualifiedName& name)
: Node(element.document(), ATTRIBUTE_NODE, { })
, m_element(element)
, m_name(name)
{
}
Attr::Attr(Document& document, const QualifiedName& name, const AtomString& standaloneValue)
: Node(document, ATTRIBUTE_NODE, { })
, m_name(name)
, m_standaloneValue(standaloneValue)
{
}
Ref<Attr> Attr::create(Element& element, const QualifiedName& name)
{
return adoptRef(*new Attr(element, name));
}
Ref<Attr> Attr::create(Document& document, const QualifiedName& name, const AtomString& value)
{
return adoptRef(*new Attr(document, name, value));
}
Attr::~Attr()
{
ASSERT_WITH_SECURITY_IMPLICATION(!isInShadowTree());
ASSERT_WITH_SECURITY_IMPLICATION(treeScope().rootNode().isDocumentNode());
// Unable to protect the document here as it may have started destruction.
willBeDeletedFrom(document());
}
ExceptionOr<void> Attr::setPrefix(const AtomString& prefix)
{
auto result = checkSetPrefix(prefix);
if (result.hasException())
return result.releaseException();
if ((prefix == xmlnsAtom() && namespaceURI() != XMLNSNames::xmlnsNamespaceURI) || qualifiedName() == xmlnsAtom())
return Exception { ExceptionCode::NamespaceError };
const AtomString& newPrefix = prefix.isEmpty() ? nullAtom() : prefix;
if (RefPtr element = m_element.get())
element->ensureUniqueElementData().findAttributeByName(qualifiedName())->setPrefix(newPrefix);
m_name.setPrefix(newPrefix);
return { };
}
ExceptionOr<void> Attr::setValue(const AtomString& value)
{
if (RefPtr element = m_element.get())
return element->setAttribute(qualifiedName(), value, true);
else
m_standaloneValue = value;
return { };
}
ExceptionOr<void> Attr::setNodeValue(const String& value)
{
return setValue(value.isNull() ? emptyAtom() : AtomString(value));
}
Ref<Node> Attr::cloneNodeInternal(Document& document, CloningOperation, CustomElementRegistry*)
{
return adoptRef(*new Attr(document, qualifiedName(), value()));
}
CSSStyleDeclaration* Attr::style()
{
// This is not part of the DOM API, and therefore not available to webpages. However, WebKit SPI
// lets clients use this via the Objective-C and JavaScript bindings.
RefPtr styledElement = dynamicDowncast<StyledElement>(m_element.get());
if (!styledElement)
return nullptr;
Ref style = MutableStyleProperties::create();
m_style = style.copyRef();
styledElement->collectPresentationalHintsForAttribute(qualifiedName(), value(), style);
return &style->ensureCSSStyleDeclaration();
}
AtomString Attr::value() const
{
if (RefPtr element = m_element.get())
return element->getAttributeForBindings(qualifiedName());
return m_standaloneValue;
}
void Attr::detachFromElementWithValue(const AtomString& value)
{
ASSERT(m_element);
ASSERT(m_standaloneValue.isNull());
m_standaloneValue = value;
m_element = nullptr;
setTreeScopeRecursively(Ref<Document> { document() });
}
void Attr::attachToElement(Element& element)
{
ASSERT(!m_element);
m_element = &element;
m_standaloneValue = nullAtom();
setTreeScopeRecursively(element.treeScope());
}
}
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