void JSObject::defineSetter(ExecState* exec, const Identifier& propertyName, JSObject* setterFunction)
{
JSValue* object = getDirect(propertyName);
if (object && object->isGetterSetter()) {
ASSERT(m_structureID->hasGetterSetterProperties());
asGetterSetter(object)->setSetter(setterFunction);
return;
}
PutPropertySlot slot;
GetterSetter* getterSetter = new (exec) GetterSetter;
putDirect(propertyName, getterSetter, None, true, slot);
// putDirect will change our StructureID if we add a new property. For
// getters and setters, though, we also need to change our StructureID
// if we override an existing non-getter or non-setter.
if (slot.type() != PutPropertySlot::NewProperty) {
if (!m_structureID->isDictionary()) {
RefPtr<StructureID> structureID = StructureID::getterSetterTransition(m_structureID);
setStructureID(structureID.release());
}
}
m_structureID->setHasGetterSetterProperties(true);
getterSetter->setSetter(setterFunction);
}
void JSObject::removeDirect(const Identifier& propertyName)
{
if (m_structureID->isDictionary()) {
m_structureID->propertyMap().remove(propertyName, m_propertyStorage);
return;
}
RefPtr<StructureID> structureID = StructureID::toDictionaryTransition(m_structureID);
structureID->propertyMap().remove(propertyName, m_propertyStorage);
setStructureID(structureID.release());
}
void JSObject::removeDirect(const Identifier& propertyName)
{
size_t offset;
if (m_structureID->isDictionary()) {
offset = m_structureID->removePropertyWithoutTransition(propertyName);
if (offset != WTF::notFound)
m_propertyStorage[offset] = jsUndefined();
return;
}
RefPtr<StructureID> structureID = StructureID::removePropertyTransition(m_structureID, propertyName, offset);
if (offset != WTF::notFound)
m_propertyStorage[offset] = jsUndefined();
setStructureID(structureID.release());
}