JSPropertyNameIterator.h [plain text]
#ifndef JSPropertyNameIterator_h
#define JSPropertyNameIterator_h
#include "JSObject.h"
#include "JSString.h"
#include "PropertyNameArray.h"
namespace JSC {
class Identifier;
class JSObject;
class JSPropertyNameIterator : public JSCell {
public:
static JSPropertyNameIterator* create(ExecState*, JSValue);
virtual ~JSPropertyNameIterator();
virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const;
virtual bool getPrimitiveNumber(ExecState*, double&, JSValue&);
virtual bool toBoolean(ExecState*) const;
virtual double toNumber(ExecState*) const;
virtual UString toString(ExecState*) const;
virtual JSObject* toObject(ExecState*) const;
virtual void mark();
JSValue next(ExecState*);
void invalidate();
private:
JSPropertyNameIterator();
JSPropertyNameIterator(JSObject*, PassRefPtr<PropertyNameArrayData> propertyNameArrayData);
JSObject* m_object;
RefPtr<PropertyNameArrayData> m_data;
PropertyNameArrayData::const_iterator m_position;
PropertyNameArrayData::const_iterator m_end;
};
inline JSPropertyNameIterator::JSPropertyNameIterator()
: JSCell(0)
, m_object(0)
, m_position(0)
, m_end(0)
{
}
inline JSPropertyNameIterator::JSPropertyNameIterator(JSObject* object, PassRefPtr<PropertyNameArrayData> propertyNameArrayData)
: JSCell(0)
, m_object(object)
, m_data(propertyNameArrayData)
, m_position(m_data->begin())
, m_end(m_data->end())
{
}
inline JSPropertyNameIterator* JSPropertyNameIterator::create(ExecState* exec, JSValue v)
{
if (v.isUndefinedOrNull())
return new (exec) JSPropertyNameIterator;
JSObject* o = v.toObject(exec);
PropertyNameArray propertyNames(exec);
o->getPropertyNames(exec, propertyNames);
return new (exec) JSPropertyNameIterator(o, propertyNames.releaseData());
}
inline JSValue JSPropertyNameIterator::next(ExecState* exec)
{
if (m_position == m_end)
return JSValue();
if (m_data->cachedStructure() == m_object->structure() && m_data->cachedPrototypeChain() == m_object->structure()->prototypeChain(exec))
return jsOwnedString(exec, (*m_position++).ustring());
do {
if (m_object->hasProperty(exec, *m_position))
return jsOwnedString(exec, (*m_position++).ustring());
m_position++;
} while (m_position != m_end);
return JSValue();
}
}
#endif // JSPropertyNameIterator_h