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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 "Event.h"
#include "NoEventDispatchAssertion.h"
#include "ScopedEventQueue.h"
#include "StyleProperties.h"
#include "StyledElement.h"
#include "TextNodeTraversal.h"
#include "XMLNSNames.h"
#include <wtf/text/AtomicString.h>
namespace WebCore {
using namespace HTMLNames;
Attr::Attr(Element& element, const QualifiedName& name)
: Node(element.document(), CreateOther)
, m_element(&element)
, m_name(name)
{
}
Attr::Attr(Document& document, const QualifiedName& name, const AtomicString& standaloneValue)
: Node(document, CreateOther)
, 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 AtomicString& value)
{
return adoptRef(*new Attr(document, name, value));
}
Attr::~Attr()
{
ASSERT_WITH_SECURITY_IMPLICATION(!isInShadowTree());
ASSERT_WITH_SECURITY_IMPLICATION(treeScope().rootNode().isDocumentNode());
}
ExceptionOr<void> Attr::setPrefix(const AtomicString& prefix)
{
auto result = checkSetPrefix(prefix);
if (result.hasException())
return result.releaseException();
if ((prefix == xmlnsAtom() && namespaceURI() != XMLNSNames::xmlnsNamespaceURI) || qualifiedName() == xmlnsAtom())
return Exception { NamespaceError };
const AtomicString& newPrefix = prefix.isEmpty() ? nullAtom() : prefix;
if (m_element)
elementAttribute().setPrefix(newPrefix);
m_name.setPrefix(newPrefix);
return { };
}
void Attr::setValue(const AtomicString& value)
{
if (m_element)
m_element->setAttribute(qualifiedName(), value);
else
m_standaloneValue = value;
}
ExceptionOr<void> Attr::setNodeValue(const String& value)
{
setValue(value);
return { };
}
Ref<Node> Attr::cloneNodeInternal(Document& targetDocument, CloningOperation)
{
return adoptRef(*new Attr(targetDocument, qualifiedName(), value()));
}
CSSStyleDeclaration* Attr::style()
{
// This function only exists to support the Obj-C bindings.
if (!is<StyledElement>(m_element))
return nullptr;
m_style = MutableStyleProperties::create();
downcast<StyledElement>(*m_element).collectStyleForPresentationAttribute(qualifiedName(), value(), *m_style);
return &m_style->ensureCSSStyleDeclaration();
}
const AtomicString& Attr::value() const
{
if (m_element)
return m_element->getAttribute(qualifiedName());
return m_standaloneValue;
}
Attribute& Attr::elementAttribute()
{
ASSERT(m_element);
ASSERT(m_element->elementData());
return *m_element->ensureUniqueElementData().findAttributeByName(qualifiedName());
}
void Attr::detachFromElementWithValue(const AtomicString& value)
{
ASSERT(m_element);
ASSERT(m_standaloneValue.isNull());
m_standaloneValue = value;
m_element = nullptr;
setTreeScopeRecursively(document());
}
void Attr::attachToElement(Element& element)
{
ASSERT(!m_element);
m_element = &element;
m_standaloneValue = nullAtom();
setTreeScopeRecursively(element.treeScope());
}
}
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