/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the QtQml module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** Alternatively, this file may be used under the terms of the GNU Lesser
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****************************************************************************/
#ifndef QV4OBJECTITERATOR_H
#define QV4OBJECTITERATOR_H

#include "qv4global_p.h"
#include "qv4property_p.h"
#include "qv4scopedvalue_p.h"
#include "qv4object_p.h"

QT_BEGIN_NAMESPACE

namespace QV4 {

struct SparseArrayNode;
struct Object;
struct ArrayObject;
struct PropertyAttributes;
struct ExecutionContext;
struct Property;
struct String;
struct InternalClass;
struct ForEachIteratorObject;

struct Q_QML_EXPORT ObjectIterator
{
    enum Flags {
        NoFlags = 0,
        EnumerableOnly = 0x1,
        WithProtoChain = 0x2,
    };

    Value *object;
    Value *current;
    SparseArrayNode *arrayNode;
    uint arrayIndex;
    uint memberIndex;
    uint flags;

    ObjectIterator(Value *scratch1, Value *scratch2, Object *o, uint flags);
    ObjectIterator(Scope &scope, Object *o, uint flags);
    void init(Object *o);
    void next(String *&name, uint *index, Property *pd, PropertyAttributes *attributes = 0);
    ReturnedValue nextPropertyName(ValueRef value);
    ReturnedValue nextPropertyNameAsString(ValueRef value);
    ReturnedValue nextPropertyNameAsString();
private:
    friend struct ForEachIteratorObject;
    ObjectIterator(Value *scratch1, Value *scratch2, uint flags); // Constructor that requires calling init()
};

struct ForEachIteratorObject: Object {
    struct Data : Object::Data {
        Data(ExecutionContext *ctx, Object *o)
            : Object::Data(ctx->engine())
            , it(workArea, workArea + 1, o, ObjectIterator::EnumerableOnly|ObjectIterator::WithProtoChain) {
            setVTable(staticVTable());
        }
        ObjectIterator it;
        Value workArea[2];
    };
    V4_OBJECT(Object)
    Q_MANAGED_TYPE(ForeachIteratorObject)

    ReturnedValue nextPropertyName() { return d()->it.nextPropertyNameAsString(); }

protected:
    static void markObjects(Managed *that, ExecutionEngine *e);
};


}

QT_END_NAMESPACE

#endif