#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
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 *
 * Software distributed under the License is distributed on an "AS IS" basis,
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 *
 * 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.
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 *
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 * ***** END LICENSE BLOCK ***** */