#ifndef _COLORER_PAIRMATCH_H_
#define _COLORER_PAIRMATCH_H_

#include<colorer/handlers/LineRegionsSupport.h>

/**
 * Representation of pair match in text.
 * Contains information about two regions on two lines.
 * @ingroup colorer_editor
 */
class PairMatch{
public:
  /**
   * Region's start position as a cloned LineRegion object.
   */
  LineRegion *start;
  /**
   * Region's end position as a cloned LineRegion object.
   */
  LineRegion *end;
  /**
   * Starting Line of pair
   */
  int sline;
  /**
   * Ending Line of pair
   */
  int eline;
  /**
   * Identifies initial position of cursor in pair
   */
  bool topPosition;
  /**
   * Internal pair search counter
   */
  int pairBalance;

  /**
   * Default constructor.
   * Clears all fields
   */
  PairMatch(LineRegion *startRef, int lineNo, bool topPosition){
    start = end = null;
    this->startRef = startRef;
    sline = lineNo;
    pairBalance = -1;
    this->topPosition = false;
    if (topPosition){
      pairBalance = 1;
      this->topPosition = true;
    };
    eline = -1;
  }

  virtual ~PairMatch(){
    delete start;
    delete end;
  }


  LineRegion *getStartRef(){
    return startRef;
  }

  /**
   * Sets a start region properties. Passed object is cloned to keep
   * pair match properties consistent between parse stages
   */
  void setStart(LineRegion *pair){
    if (start != null){
      delete start;
    }
    if (pair != null){
      start = new LineRegion(*pair);
    }
  }

  /**
   * Sets an end region properties. Passed object is cloned to keep
   * pair match properties consistent between parse stages
   */
  void setEnd(LineRegion *pair){
    if (end != null){
      delete end;
    }
    if (pair != null){
      end = new LineRegion(*pair);
    }
  }
private:
  /**
   * Region's start position as a reference to inparse sequence.
   */
  LineRegion *startRef;
};

#endif
/* ***** 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 the Colorer Library.
 *
 * The Initial Developer of the Original Code is
 * Cail Lomecb <cail@nm.ru>.
 * Portions created by the Initial Developer are Copyright (C) 1999-2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * 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
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 * 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 ***** */