Allow for new message notification aswell as showing new messages (move logic to php)

Just something I played around with but have not tested:

in Pmgrowl.module, replace with pmgrowl_json()

function pmgrowl_json() {
  global $user;
  global $baseurl;
  if (variable_get() == 'message content') {
    $data = pmgrowl_message_contents($user, $baseurl);
  }
  else {
    $data = pmgrowl_message_count($user, $baseurl);
  }
  drupal_json($data);
}

function pmgrowl_message_contents($account, $baseurl) {
  
  $query = 'SELECT * FROM {pm_index} i LEFT JOIN {pm_message} m ON m.mid = i.mid WHERE (i.uid = %d AND i.is_new = 1) ORDER BY m.timestamp DESC';
  $result = db_query($query, $account->uid);

  $data = array();
  while ($row = db_fetch_object($result)) {
    $row->body = truncate_utf8($row->body, 300, FALSE, TRUE);
    $row->body .= '<p><a href="'.$base_url. '/messages/view/' + entry['thread_id'] + '">Open & Reply</a>';
    $row->body .= ' | <a href="'.$base_url.'/messages">View All.</a></p>';
    $data[] = $row;
  }
  return $data
}

function pmgrowl_message_count($account, $baseurl) {
  $unread = array()
  $unread['count'] = privatemsg_unread_count($account);
  
  if ($unread['count'] <> 0 && ($unread['count'] <> $_COOKIE["privatemsg_unread_count"])) {
    $unread['subject'] = 'You have Mail!';
    $unread['body'] = 'You have <a href="'.$base_url.'/messages">'.$unread['count'].' unread messages</a>.';
    setcookie  ('privatemsg_unread_count', $unread['count'], time()+60*60, '/', )
  }
  $data[] = $unread;
  return $data;
}

I have not made the changes to pmgrowl.js, but with the above, you can replace

$.jGrowl(entry['body'] + '<p><a href="' + Drupal.settings.basePath + 'messages/view/' + entry['thread_id'] + '">Open & Reply</a>' +
              ' | <a href="' + Drupal.settings.basePath + 'messages">View All.</a></p>'

with just

$.jGrowl(entry['body']