/* -*- 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/. */

#include "txExpr.h"

#include "txNodeSet.h"

#include "txIXPathContext.h"

#include "txXPathTreeWalker.h"

/**

 * Evaluates this Expr based on the given context node and processor state

 * @param context the context node for evaluation of this Expr

 * @param ps the ContextState containing the stack information needed

 * for evaluation

 * @return the result of the evaluation

**/

nsresult

RootExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)

{

    txXPathTreeWalker walker(aContext->getContextNode());

    walker.moveToRoot();

    return aContext->recycler()->getNodeSet(walker.getCurrentPosition(),

                                            aResult);

}

TX_IMPL_EXPR_STUBS_0(RootExpr, NODESET_RESULT)

bool

RootExpr::isSensitiveTo(ContextSensitivity aContext)

{

    return !!(aContext & NODE_CONTEXT);

}

#ifdef TX_TO_STRING

void

RootExpr::toString(nsAString& dest)

{

    if (mSerialize)

        dest.Append(char16_t('/'));

}

#endif