/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __TX_XPATH_SET_CONTEXT

#define __TX_XPATH_SET_CONTEXT

#include "txIXPathContext.h"

#include "txNodeSet.h"

#include "nsAutoPtr.h"

class txNodeSetContext : public txIEvalContext

{

public:

    txNodeSetContext(txNodeSet* aContextNodeSet, txIMatchContext* aContext)

        : mContextSet(aContextNodeSet), mPosition(0), mInner(aContext)

    {

    }

    // Iteration over the given NodeSet

    bool hasNext()

    {

        return mPosition < size();

    }

    void next()

    {

        NS_ASSERTION(mPosition < size(), "Out of bounds.");

        mPosition++;

    }

    void setPosition(uint32_t aPosition)

    {

        NS_ASSERTION(aPosition > 0 &&

                     aPosition <= size(), "Out of bounds.");

        mPosition = aPosition;

    }

    TX_DECL_EVAL_CONTEXT;

protected:

    RefPtr<txNodeSet> mContextSet;

    uint32_t mPosition;

    txIMatchContext* mInner;

};

#endif // __TX_XPATH_SET_CONTEXT