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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 "core/dom/Attr.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/Document.h"
#include "core/dom/Element.h"
#include "core/dom/Text.h"
#include "core/events/ScopedEventQueue.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/StringBuilder.h"
namespace blink {
using namespace HTMLNames;
Attr::Attr(Element& element, const QualifiedName& name)
: Node(&element.document(), CreateOther),
m_element(this, &element),
m_name(name) {}
Attr::Attr(Document& document,
const QualifiedName& name,
const AtomicString& standaloneValue)
: Node(&document, CreateOther),
m_element(this, nullptr),
m_name(name),
m_standaloneValueOrAttachedLocalName(standaloneValue) {}
Attr* Attr::create(Element& element, const QualifiedName& name) {
return new Attr(element, name);
}
Attr* Attr::create(Document& document,
const QualifiedName& name,
const AtomicString& value) {
return new Attr(document, name, value);
}
Attr::~Attr() {}
const QualifiedName Attr::getQualifiedName() const {
if (m_element && !m_standaloneValueOrAttachedLocalName.isNull()) {
// In the unlikely case the Element attribute has a local name
// that differs by case, construct the qualified name based on
// it. This is the qualified name that must be used when
// looking up the attribute on the element.
return QualifiedName(m_name.prefix(), m_standaloneValueOrAttachedLocalName,
m_name.namespaceURI());
}
return m_name;
}
const AtomicString& Attr::value() const {
if (m_element)
return m_element->getAttribute(getQualifiedName());
return m_standaloneValueOrAttachedLocalName;
}
void Attr::setValue(const AtomicString& value) {
// Element::setAttribute will remove the attribute if value is null.
DCHECK(!value.isNull());
if (m_element)
m_element->setAttribute(getQualifiedName(), value);
else
m_standaloneValueOrAttachedLocalName = value;
}
void Attr::setNodeValue(const String& v) {
// Attr uses AtomicString type for its value to save memory as there
// is duplication among Elements' attributes values.
setValue(v.isNull() ? emptyAtom : AtomicString(v));
}
Node* Attr::cloneNode(bool /*deep*/) {
return new Attr(document(), m_name, value());
}
void Attr::detachFromElementWithValue(const AtomicString& value) {
DCHECK(m_element);
m_standaloneValueOrAttachedLocalName = value;
m_element = nullptr;
}
void Attr::attachToElement(Element* element,
const AtomicString& attachedLocalName) {
DCHECK(!m_element);
m_element = element;
m_standaloneValueOrAttachedLocalName = attachedLocalName;
}
DEFINE_TRACE(Attr) {
visitor->trace(m_element);
Node::trace(visitor);
}
DEFINE_TRACE_WRAPPERS(Attr) {
visitor->traceWrappers(m_element);
Node::traceWrappers(visitor);
}
} // namespace blink
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