/*****************************************************************************
#   Copyright (C) 1994-2008 by David Gordon.
#   All rights reserved.                           
#                                                                           
#   This software is part of a beta-test version of the Consed/Autofinish
#   package.  It should not be redistributed or
#   used for any commercial purpose, including commercially funded
#   sequencing, without written permission from the author and the
#   University of Washington.
#   
#   This software is provided ``AS IS'' and any express or implied
#   warranties, including, but not limited to, the implied warranties of
#   merchantability and fitness for a particular purpose, are disclaimed.
#   In no event shall the authors or the University of Washington be
#   liable for any direct, indirect, incidental, special, exemplary, or
#   consequential damages (including, but not limited to, procurement of
#   substitute goods or services; loss of use, data, or profits; or
#   business interruption) however caused and on any theory of liability,
#   whether in contract, strict liability, or tort (including negligence
#   or otherwise) arising in any way out of the use of this software, even
#   if advised of the possibility of such damage.
#
#   Building Consed from source is error prone and not simple which is
#   why I provide executables.  Due to time limitations I cannot
#   provide any assistance in building Consed.  Even if you do not
#   modify the source, you may introduce errors due to using a
#   different version of the compiler, a different version of motif,
#   different versions of other libraries than I used, etc.  For this
#   reason, if you discover Consed bugs, I can only offer help with
#   those bugs if you first reproduce those bugs with an executable
#   provided by me--not an executable you have built.
# 
#   Modifying Consed is also difficult.  Although Consed is modular,
#   some modules are used by many other modules.  Thus making a change
#   in one place can have unforeseen effects on many other features.
#   It may takes months for you to notice these other side-effects
#   which may not seen connected at all.  It is not feasable for me to
#   provide help with modifying Consed sources because of the
#   potentially huge amount of time involved.
#
#*****************************************************************************/
#include    "breakIntoShorterLines.h"
#include    "rwcstring.h"


void breakIntoShorterLines( RWCString& soMessage, const int nMaxCharsPerLine ) {

   int nCharsOnCurrentLine = 0;
   int nPos = 0;
   while( nPos < soMessage.length() ) {
      if (soMessage[nPos] == '\n' )
        nCharsOnCurrentLine = 0;
      else {
         ++nCharsOnCurrentLine;
         if (nCharsOnCurrentLine >= nMaxCharsPerLine ) {
     

            // back up and break the line at a space
       
            int nPos2 = nPos;
            bool bFoundSpace = false;
            while( !bFoundSpace && nPos2 > nPos - nMaxCharsPerLine ) {
               if ( soMessage[nPos2] == ' ' ) 
                 bFoundSpace = true;
               else
                 --nPos2;
            }
            if (bFoundSpace) {
               nPos = nPos2;

               // converts space to a line feed
               soMessage[nPos] = '\n';
               nCharsOnCurrentLine = 0;
               // get rid of any spaces after inserting the line feed

               // notice that I am doing this indexing without subscript
               // checking so that I can use the \0 at the end of the 
               // string to just out of this loop.

               while( soMessage( nPos + 1 ) == ' ' )
                  soMessage.remove( nPos + 1, 1 );

            }
            else {
               // give up--just insert a line feed after nMaxCharsPerLine
               soMessage.insert( nPos, "\n" );
               nCharsOnCurrentLine = 0;
            }
         }
      }
      ++nPos;
   }
}