/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is TransforMiiX XSLT processor code.
 *
 * The Initial Developer of the Original Code is
 * Jonas Sicking.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Jonas Sicking <jonas@sicking.cc> (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "txError.h"
#include "txExpr.h"
#include "nsString.h"
#include "txIXPathContext.h"

nsresult
txErrorExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
{
    *aResult = nsnull;

    nsAutoString err(NS_LITERAL_STRING("Invalid expression evaluated"));
#ifdef TX_TO_STRING
    err.AppendLiteral(": ");
    toString(err);
#endif
    aContext->receiveError(err,
                           NS_ERROR_XPATH_INVALID_EXPRESSION_EVALUATED);

    return NS_ERROR_XPATH_INVALID_EXPRESSION_EVALUATED;
}

TX_IMPL_EXPR_STUBS_0(txErrorExpr, ANY_RESULT)

PRBool
txErrorExpr::isSensitiveTo(ContextSensitivity aContext)
{
    // It doesn't really matter what we return here, but it might
    // be a good idea to try to keep this as unoptimizable as possible
    return PR_TRUE;
}

#ifdef TX_TO_STRING
void
txErrorExpr::toString(nsAString& aStr)
{
    aStr.Append(mStr);
}
#endif