/* -*- 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 "nsAtom.h"

#include "txIXPathContext.h"

#include "txNodeSet.h"

#include "txExpr.h"

#include "txXPathTreeWalker.h"

txNamedAttributeStep::txNamedAttributeStep(int32_t aNsID,

                                           nsAtom* aPrefix,

                                           nsAtom* aLocalName)

    : mNamespace(aNsID),

      mPrefix(aPrefix),

      mLocalName(aLocalName)

{

}

nsresult

txNamedAttributeStep::evaluate(txIEvalContext* aContext,

                               txAExprResult** aResult)

{

    *aResult = nullptr;

    RefPtr<txNodeSet> nodes;

    nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));

    NS_ENSURE_SUCCESS(rv, rv);

    txXPathTreeWalker walker(aContext->getContextNode());

    if (walker.moveToNamedAttribute(mLocalName, mNamespace)) {

        rv = nodes->append(walker.getCurrentPosition());

        NS_ENSURE_SUCCESS(rv, rv);

    }

    NS_ADDREF(*aResult = nodes);

    return NS_OK;

}

TX_IMPL_EXPR_STUBS_0(txNamedAttributeStep, NODESET_RESULT)

bool

txNamedAttributeStep::isSensitiveTo(ContextSensitivity aContext)

{

    return !!(aContext & NODE_CONTEXT);

}

#ifdef TX_TO_STRING

void

txNamedAttributeStep::toString(nsAString& aDest)

{

    aDest.Append(char16_t('@'));

    if (mPrefix) {

        nsAutoString prefix;

        mPrefix->ToString(prefix);

        aDest.Append(prefix);

        aDest.Append(char16_t(':'));

    }

    nsAutoString localName;

    mLocalName->ToString(localName);

    aDest.Append(localName);

}

#endif