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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 "core/dom/Attr.h"
#include "XMLNSNames.h"
#include "bindings/v8/ExceptionState.h"
#include "bindings/v8/ExceptionStatePlaceholder.h"
#include "core/dom/Element.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/Text.h"
#include "core/events/ScopedEventQueue.h"
#include "core/frame/UseCounter.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/StringBuilder.h"
namespace WebCore {
using namespace HTMLNames;
Attr::Attr(Element& element, const QualifiedName& name)
: ContainerNode(&element.document())
, m_element(&element)
, m_name(name)
, m_ignoreChildrenChanged(0)
{
ScriptWrappable::init(this);
}
Attr::Attr(Document& document, const QualifiedName& name, const AtomicString& standaloneValue)
: ContainerNode(&document)
, m_element(0)
, m_name(name)
, m_standaloneValue(standaloneValue)
, m_ignoreChildrenChanged(0)
{
ScriptWrappable::init(this);
}
PassRefPtr<Attr> Attr::create(Element& element, const QualifiedName& name)
{
RefPtr<Attr> attr = adoptRef(new Attr(element, name));
attr->createTextChild();
return attr.release();
}
PassRefPtr<Attr> Attr::create(Document& document, const QualifiedName& name, const AtomicString& value)
{
RefPtr<Attr> attr = adoptRef(new Attr(document, name, value));
attr->createTextChild();
return attr.release();
}
Attr::~Attr()
{
}
void Attr::createTextChild()
{
ASSERT(refCount());
if (!value().isEmpty()) {
RefPtr<Text> textNode = document().createTextNode(value().string());
// This does everything appendChild() would do in this situation (assuming m_ignoreChildrenChanged was set),
// but much more efficiently.
textNode->setParentOrShadowHostNode(this);
treeScope().adoptIfNeeded(*textNode);
setFirstChild(textNode.get());
setLastChild(textNode.get());
}
}
void Attr::setPrefix(const AtomicString& prefix, ExceptionState& exceptionState)
{
UseCounter::count(document(), UseCounter::AttributeSetPrefix);
checkSetPrefix(prefix, exceptionState);
if (exceptionState.hadException())
return;
if (prefix == xmlnsAtom && namespaceURI() != XMLNSNames::xmlnsNamespaceURI) {
exceptionState.throwDOMException(NamespaceError, "The prefix '" + xmlnsAtom + "' may not be used on the namespace '" + namespaceURI() + "'.");
return;
}
if (this->qualifiedName() == xmlnsAtom) {
exceptionState.throwDOMException(NamespaceError, "The prefix '" + prefix + "' may not be used as a namespace prefix for attributes whose qualified name is '" + xmlnsAtom + "'.");
return;
}
const AtomicString& newPrefix = prefix.isEmpty() ? nullAtom : prefix;
if (m_element)
elementAttribute().setPrefix(newPrefix);
m_name.setPrefix(newPrefix);
}
void Attr::setValue(const AtomicString& value)
{
EventQueueScope scope;
m_ignoreChildrenChanged++;
removeChildren();
if (m_element)
elementAttribute().setValue(value);
else
m_standaloneValue = value;
createTextChild();
m_ignoreChildrenChanged--;
invalidateNodeListCachesInAncestors(&m_name, m_element);
}
void Attr::setValue(const AtomicString& value, ExceptionState&)
{
if (m_element)
m_element->willModifyAttribute(qualifiedName(), this->value(), value);
setValue(value);
if (m_element)
m_element->didModifyAttribute(qualifiedName(), value);
}
void Attr::setNodeValue(const String& v)
{
setValue(v, IGNORE_EXCEPTION);
}
PassRefPtr<Node> Attr::cloneNode(bool /*deep*/)
{
RefPtr<Attr> clone = adoptRef(new Attr(document(), qualifiedName(), value()));
cloneChildNodes(clone.get());
return clone.release();
}
// DOM Section 1.1.1
bool Attr::childTypeAllowed(NodeType type) const
{
return TEXT_NODE == type;
}
void Attr::childrenChanged(bool, Node*, Node*, int)
{
if (m_ignoreChildrenChanged > 0)
return;
invalidateNodeListCachesInAncestors(&qualifiedName(), m_element);
StringBuilder valueBuilder;
for (Node *n = firstChild(); n; n = n->nextSibling()) {
if (n->isTextNode())
valueBuilder.append(toText(n)->data());
}
AtomicString newValue = valueBuilder.toAtomicString();
if (m_element)
m_element->willModifyAttribute(qualifiedName(), value(), newValue);
if (m_element)
elementAttribute().setValue(newValue);
else
m_standaloneValue = newValue;
if (m_element)
m_element->attributeChanged(qualifiedName(), newValue);
}
bool Attr::isId() const
{
return qualifiedName().matches(document().idAttributeName());
}
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()->getAttributeItem(qualifiedName());
}
void Attr::detachFromElementWithValue(const AtomicString& value)
{
ASSERT(m_element);
ASSERT(m_standaloneValue.isNull());
m_standaloneValue = value;
m_element = 0;
}
void Attr::attachToElement(Element* element)
{
ASSERT(!m_element);
m_element = element;
m_standaloneValue = nullAtom;
}
}
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