/* -*- 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) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Jonas Sicking <sicking@bigfoot.com>
 *
 * 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 TRANSFRMX_TXXSLTNUMBER_H
#define TRANSFRMX_TXXSLTNUMBER_H

#include "txError.h"
#include "txList.h"
#include "nsString.h"

class Expr;
class txPattern;
class txIEvalContext;
class txIMatchContext;
class txXPathTreeWalker;

class txXSLTNumber {
public:
    enum LevelType {
        eLevelSingle,
        eLevelMultiple,
        eLevelAny
    };

    static nsresult createNumber(Expr* aValueExpr, txPattern* aCountPattern,
                                 txPattern* aFromPattern, LevelType aLevel,
                                 Expr* aGroupSize, Expr* aGroupSeparator,
                                 Expr* aFormat, txIEvalContext* aContext,
                                 nsAString& aResult);

private:
    static nsresult getValueList(Expr* aValueExpr, txPattern* aCountPattern,
                                 txPattern* aFromPattern, LevelType aLevel,
                                 txIEvalContext* aContext, txList& aValues,
                                 nsAString& aValueString);

    static nsresult getCounters(Expr* aGroupSize, Expr* aGroupSeparator,
                                Expr* aFormat, txIEvalContext* aContext,
                                txList& aCounters, nsAString& aHead,
                                nsAString& aTail);

    /**
     * getSiblingCount uses aWalker to walk the siblings of aWalker's current
     * position.
     *
     */
    static PRInt32 getSiblingCount(txXPathTreeWalker& aWalker,
                                   txPattern* aCountPattern,
                                   txIMatchContext* aContext);
    
    static bool getPrevInDocumentOrder(txXPathTreeWalker& aWalker);

    static bool isAlphaNumeric(PRUnichar ch);
};

class txFormattedCounter {
public:
    virtual ~txFormattedCounter()
    {
    }
    
    virtual void appendNumber(PRInt32 aNumber, nsAString& aDest) = 0;

    static nsresult getCounterFor(const nsAFlatString& aToken, int aGroupSize,
                                  const nsAString& aGroupSeparator,
                                  txFormattedCounter*& aCounter);
    
    nsString mSeparator;
};

#endif //TRANSFRMX_TXXSLTNUMBER_H
