/* ====================================================================
 * Copyright (c) 2003-2006, Martin Hauner
 *                          http://subcommander.tigris.org
 *
 * Subcommander is licensed as described in the file doc/COPYING, which
 * you should have received as part of this distribution.
 * ====================================================================
 */

#ifndef _SC_TAB_H
#define _SC_TAB_H

/**
 * \brief helper class for handling tabs in text lines.
 */

// TODO rename..
class Tab
{
public:
  Tab( unsigned int tabwidth );

  unsigned int calcColumns( const char* s );
  int calcColumnForNextChar( const char* s, int pos );
  int calcColumnForPrevChar( const char* s, int pos );
  int calcCharOffsetForColumn( const char* s, int col );
  int calcColumnForColumn( const char* s, int col );

private:
  unsigned int _tabwidth;   ///< tabwidth to use for calculations
};


#endif //  _SC_TAB_H