void ElementData::destroy()
{
if (m_isUnique)
delete toUniqueElementData(this);
else
delete toShareableElementData(this);
}
void ElementData::finalizeGarbageCollectedObject()
{
if (m_isUnique)
toUniqueElementData(this)->~UniqueElementData();
else
toShareableElementData(this)->~ShareableElementData();
}
void Element::cloneAttributesFromElement(const Element& other)
{
other.synchronizeAllAttributes();
if (!other.m_elementData) {
m_elementData.clear();
return;
}
const AtomicString& oldID = getIdAttribute();
const AtomicString& newID = other.getIdAttribute();
if (!oldID.isNull() || !newID.isNull())
updateId(oldID, newID);
// If 'other' has a mutable ElementData, convert it to an immutable one so we can share it between both elements.
// We can only do this if there are no presentation attributes and sharing the data won't result in different case sensitivity of class or id.
if (other.m_elementData->isUnique())
const_cast<Element&>(other).m_elementData = toUniqueElementData(other.m_elementData)->makeShareableCopy();
if (!other.m_elementData->isUnique())
m_elementData = other.m_elementData;
else
m_elementData = other.m_elementData->makeUniqueCopy();
AttributeCollection attributes = m_elementData->attributes();
AttributeCollection::iterator end = attributes.end();
for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it)
attributeChangedFromParserOrByCloning(it->name(), it->value(), ModifiedByCloning);
}
void ElementData::trace(Visitor* visitor)
{
if (m_isUnique)
toUniqueElementData(this)->traceAfterDispatch(visitor);
else
toShareableElementData(this)->traceAfterDispatch(visitor);
}
PassRefPtr<UniqueElementData> ElementData::makeUniqueCopy() const
{
if (isUnique())
return adoptRef(new UniqueElementData(toUniqueElementData(*this)));
return adoptRef(new UniqueElementData(toShareableElementData(*this)));
}