/*
** Apollo - Test Skeleton Toolkit for Web Start/JNLP
** Copyright (c) 2001, 2002, 2003 by Gerald Bauer
**
** This program is free software.
**
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE.
**
*/

package apollo;

import java.awt.datatransfer.*;

class SecureClipboardHandler
{
   private static SecureClipboardHandler _handler;

   private ClipboardService _clipboardService;

   private SecureClipboardHandler()
   {
      _clipboardService = ServiceManager.lookupClipboardService();
   }


   public void setContents( Transferable trans )
   {
      _clipboardService.setContents( trans );
   }

   public static SecureClipboardHandler getHandler()
   {
      if( _handler == null )
         _handler = new SecureClipboardHandler();
      return _handler;
   }

   public Transferable getContents()
   {
      return _clipboardService.getContents();
   }

   public void copyText( String text )
   {
      // aka copy to clipboard
      setContents( new StringSelection( text ) );
   }

   public String pasteText()
   {
      // aka paste from clipboard
      Transferable t = getContents();
      try
      {
         return ( String ) t.getTransferData( DataFlavor.stringFlavor );
      }
      catch( Exception ex )
      {
         // todo: should I catch exception?
         //   should I print a error message
         //   should I return null instead of an empty string?
         return "";
      }
   }
}