- optimization: don't set first/last/prev/next uids in preview/print mode

program/steps/mail/show.inc

@@ -102,9 +102,11 @@ if ($_GET['_uid']) {
     }
   }
 
-
-  $next = $prev = $first = $last = -1;
   // get previous, first, next and last message UID
+  if ($RCMAIL->action != 'preview' && $RCMAIL->action != 'print')
+    {
+    $next = $prev = $first = $last = -1;
+
     if ((!($_SESSION['sort_col'] == 'date' && $_SESSION['sort_order'] == 'DESC') &&
       $IMAP->get_capability('sort')) || !empty($_REQUEST['_search']))
       {
@@ -121,12 +123,14 @@ if ($_GET['_uid']) {
     else
       {
       // this assumes that we are sorted by date_DESC
+      $cnt = $IMAP->messagecount();
       $seq = $IMAP->get_id($MESSAGE->uid);
+      $MESSAGE->index = $cnt - $seq;
+
       $prev = $IMAP->get_uid($seq + 1);
-    $first = $IMAP->get_uid($IMAP->messagecount());
+      $first = $IMAP->get_uid($cnt);
       $next = $IMAP->get_uid($seq - 1);
       $last = $IMAP->get_uid(1);
-    $MESSAGE->index = $IMAP->messagecount() - $seq;
       }
 
     if ($prev > 0)
@@ -137,6 +141,7 @@ if ($_GET['_uid']) {
       $OUTPUT->set_env('next_uid', $next);
     if ($last > 0)
       $OUTPUT->set_env('last_uid', $last);
+    }
 
   // mark message as read
   if (!$MESSAGE->headers->seen)