/* -*- 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.
 *
 * The Initial Developer of the Original Code is
 * Axel Hecht.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Axel Hecht <axel@pike.org>
 *
 * 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 ***** */

#ifndef __TX_XPATH_SINGLENODE_CONTEXT
#define __TX_XPATH_SINGLENODE_CONTEXT

#include "txIXPathContext.h"

class txSingleNodeContext : public txIEvalContext
{
public:
    txSingleNodeContext(Node* aContextNode, txIMatchContext* aContext)
        : mNode(aContextNode), mInner(aContext)
    {
        NS_ASSERTION(aContextNode, "context node must be given");
        NS_ASSERTION(aContext, "txIMatchContext must be given");
    }
    ~txSingleNodeContext()
    {}

    nsresult getVariable(PRInt32 aNamespace, nsIAtom* aLName,
                         ExprResult*& aResult)
    {
        NS_ASSERTION(mInner, "mInner is null!!!");
        return mInner->getVariable(aNamespace, aLName, aResult);
    }

    MBool isStripSpaceAllowed(Node* aNode)
    {
        NS_ASSERTION(mInner, "mInner is null!!!");
        return mInner->isStripSpaceAllowed(aNode);
    }

    void receiveError(const nsAString& aMsg, nsresult aRes)
    {
        NS_ASSERTION(mInner, "mInner is null!!!");
#ifdef DEBUG
        nsAutoString error(NS_LITERAL_STRING("forwarded error: "));
        error.Append(aMsg);
        mInner->receiveError(error, aRes);
#else
        mInner->receiveError(aMsg, aRes);
#endif
    }

    Node* getContextNode()
    {
        return mNode;
    }

    PRUint32 size()
    {
        return 1;
    }

    PRUint32 position()
    {
        return 1;
    }

private:
    Node* mNode;
    txIMatchContext* mInner;
};

#endif // __TX_XPATH_SINGLENODE_CONTEXT
