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/*
* Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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 markChildren(MarkStack&);
JSValue next(ExecState*);
void invalidate();
static PassRefPtr<Structure> createStructure(JSValue prototype)
{
return Structure::create(prototype, TypeInfo(CompoundType));
}
private:
JSPropertyNameIterator(ExecState*);
JSPropertyNameIterator(ExecState*, JSObject*, PassRefPtr<PropertyNameArrayData> propertyNameArrayData);
JSObject* m_object;
RefPtr<PropertyNameArrayData> m_data;
PropertyNameArrayData::const_iterator m_position;
PropertyNameArrayData::const_iterator m_end;
};
inline JSPropertyNameIterator::JSPropertyNameIterator(ExecState* exec)
: JSCell(exec->globalData().propertyNameIteratorStructure.get())
, m_object(0)
, m_position(0)
, m_end(0)
{
}
inline JSPropertyNameIterator::JSPropertyNameIterator(ExecState* exec, JSObject* object, PassRefPtr<PropertyNameArrayData> propertyNameArrayData)
: JSCell(exec->globalData().propertyNameIteratorStructure.get())
, 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(exec);
JSObject* o = v.toObject(exec);
PropertyNameArray propertyNames(exec);
o->getPropertyNames(exec, propertyNames);
return new (exec) JSPropertyNameIterator(exec, 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();
}
} // namespace JSC
#endif // JSPropertyNameIterator_h
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