#include "config.h"
#include "Attr.h"
#include "ExceptionCode.h"
#include "ScopedEventQueue.h"
#include "StyleProperties.h"
#include "StyledElement.h"
#include "TextNodeTraversal.h"
#include "XMLNSNames.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)
{
}
Attr::Attr(Document& document, const QualifiedName& name, const AtomicString& standaloneValue)
: ContainerNode(document)
, m_element(0)
, m_name(name)
, m_standaloneValue(standaloneValue)
, m_ignoreChildrenChanged(0)
{
}
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());
textNode->setParentNode(this);
setFirstChild(textNode.get());
setLastChild(textNode.get());
}
}
void Attr::setPrefix(const AtomicString& prefix, ExceptionCode& ec)
{
ec = 0;
checkSetPrefix(prefix, ec);
if (ec)
return;
if ((prefix == xmlnsAtom && namespaceURI() != XMLNSNames::xmlnsNamespaceURI)
|| static_cast<Attr*>(this)->qualifiedName() == xmlnsAtom) {
ec = NAMESPACE_ERR;
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--;
invalidateNodeListAndCollectionCachesInAncestors(&m_name, m_element);
}
void Attr::setValue(const AtomicString& value, ExceptionCode&)
{
AtomicString oldValue = this->value();
if (m_element)
m_element->willModifyAttribute(qualifiedName(), oldValue, value);
setValue(value);
if (m_element)
m_element->didModifyAttribute(qualifiedName(), oldValue, value);
}
void Attr::setNodeValue(const String& v, ExceptionCode& ec)
{
setValue(v, ec);
}
PassRefPtr<Node> Attr::cloneNode(bool )
{
RefPtr<Attr> clone = adoptRef(new Attr(document(), qualifiedName(), value()));
cloneChildNodes(clone.get());
return clone.release();
}
bool Attr::childTypeAllowed(NodeType type) const
{
switch (type) {
case TEXT_NODE:
case ENTITY_REFERENCE_NODE:
return true;
default:
return false;
}
}
void Attr::childrenChanged(const ChildChange&)
{
if (m_ignoreChildrenChanged > 0)
return;
invalidateNodeListAndCollectionCachesInAncestors(&qualifiedName(), m_element);
StringBuilder valueBuilder;
TextNodeTraversal::appendContents(this, valueBuilder);
AtomicString oldValue = value();
AtomicString newValue = valueBuilder.toAtomicString();
if (m_element)
m_element->willModifyAttribute(qualifiedName(), oldValue, newValue);
if (m_element)
elementAttribute().setValue(newValue);
else
m_standaloneValue = newValue;
if (m_element)
m_element->attributeChanged(qualifiedName(), oldValue, newValue);
}
bool Attr::isId() const
{
return qualifiedName().matches(HTMLNames::idAttr);
}
CSSStyleDeclaration* Attr::style()
{
if (!m_element || !m_element->isStyledElement())
return nullptr;
m_style = MutableStyleProperties::create();
toStyledElement(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 = 0;
}
void Attr::attachToElement(Element* element)
{
ASSERT(!m_element);
m_element = element;
m_standaloneValue = nullAtom;
}
}