#ifndef _COLORER_LINESOURCE_H_
#define _COLORER_LINESOURCE_H_

#include<common/Common.h>

/**
  Interface for editor line information requests.
  Basic data source interface, used in TextParser processing.
  @note Methods startJob and endJob are optional, and
  could be implemented or not depending on system archtecture.
  @ingroup colorer
*/
class LineSource
{
public:

  /** Called by parser, when it starts text parsing.
      @param lno Line number, which will be used as
      initial position of all subsequend parsing.
  */
  virtual void startJob(int lno){};

  /** Called by parser, when it has finished text parsing.
      Could be used to cleanup objects, allocated by last
      #getLine() call.
  */
  virtual void endJob(int lno){};

  /**
    Returns line of text with specified number.
    Returns String class pointer, which incapsulates information
    about line with number <code>lno</code>.
    @note Returned pointer must be valid until next getLine method call.
          If requested line can't be returned, fe there is no line with the passed
          index, method must return null.
    @param lno Requested line number
    @return Unicode string, enwrapped into String class.
  */
  virtual String *getLine(int lno) = 0;
protected:
  LineSource(){};
  virtual ~LineSource(){};
};


#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) 1999-2003
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
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 * ***** END LICENSE BLOCK ***** */