/**
  * Edit comment.
  */
 function editComment($args, $request)
 {
     $paperId = (int) array_shift($args);
     $commentId = (int) array_shift($args);
     $submissionEditHandler = new SubmissionEditHandler();
     $submissionEditHandler->validate($request, $paperId);
     $paperDao = DAORegistry::getDAO('PaperDAO');
     $submission =& $paperDao->getPaper($paperId);
     $this->addCheck(new HandlerValidatorSubmissionComment($this, $commentId));
     $this->validate($request);
     $comment =& $this->comment;
     $this->setupTemplate($request, true);
     if ($comment->getCommentType() == COMMENT_TYPE_DIRECTOR_DECISION) {
         // Cannot edit a director decision comment.
         $request->redirect(null, null, $request->getRequestedPage());
     }
     TrackDirectorAction::editComment($submission, $comment);
 }