package org.lsst.ccs.shell;
   
   import java.io.IOException;
   import java.util.List;
   import jline.console.ConsoleReader;
   import jline.console.completer.CandidateListCompletionHandler;
   
   /**
    * Extend JLine's built-in completion handler to handle giving
   * information on specific parameters. 
   * @author tonyj
   */
  class CommandCompletionHandler extends CandidateListCompletionHandler {
  
      @Override
      public boolean complete(ConsoleReader reader, List<CharSequence> candidates, int pos) throws IOException {
          //FIXME: Using # to indicate parameter help is ugly
          if (candidates.size() == 1 && candidates.get(0).length()>1 && candidates.get(0).charAt(0)=='#') {
              reader.println();
              reader.println(candidates.get(0).subSequence(1, candidates.get(0).length()));
              reader.drawLine();
              return true;
          } else {
              return super.complete(reader, candidates, pos);
          }
      }
  
      
  }