/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

#ifndef TRANSFRMX_TXXSLTNUMBER_H
#define TRANSFRMX_TXXSLTNUMBER_H

#include "nsError.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 nsresult getSiblingCount(txXPathTreeWalker& aWalker,
                                  txPattern* aCountPattern,
                                  txIMatchContext* aContext, int32_t* aCount);

  static bool getPrevInDocumentOrder(txXPathTreeWalker& aWalker);

  static bool isAlphaNumeric(char16_t ch);
};

class txFormattedCounter {
 public:
  virtual ~txFormattedCounter() = default;

  virtual void appendNumber(int32_t aNumber, nsAString& aDest) = 0;

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

  nsString mSeparator;
};

#endif  // TRANSFRMX_TXXSLTNUMBER_H