- Improve responsiveness of messages displaying (#1486986)

1 files changed, 74 insertions, 0 deletions

diff --git a/program/steps/mail/pagenav.inc b/program/steps/mail/pagenav.inc
new file mode 100644
index 000000000..b62520fab
--- /dev/null
+++ b/program/steps/mail/pagenav.inc
@@ -0,0 +1,74 @@
+<?php
+
+/*
+ +-----------------------------------------------------------------------+
+ | program/steps/mail/pagenav.inc                                        |
+ |                                                                       |
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2009, Roundcube Dev. - Switzerland                 |
+ | Licensed under the GNU GPL                                            |
+ |                                                                       |
+ | PURPOSE:                                                              |
+ |   Updates message page navigation controls                            |
+ |                                                                       |
+ +-----------------------------------------------------------------------+
+ | Author: Aleksander Machniak <alec@alec.pl>                            |
+ +-----------------------------------------------------------------------+
+
+ $Id: show.inc 4176 2010-11-04 09:59:55Z alec $
+
+*/
+
+$uid = get_input_value('_uid', RCUBE_INPUT_GET);
+$cnt  = $IMAP->messagecount(NULL, 'ALL'); // Only messages, no threads here
+
+if ($_SESSION['sort_col'] == 'date' && $_SESSION['sort_order'] != 'DESC'
+    && empty($_REQUEST['_search']) && !$CONFIG['skip_deleted'] && !$IMAP->threading
+) {
+    // this assumes that we are sorted by date_DESC
+    $seq   = $IMAP->get_id($uid);
+    $index = $cnt - $seq;
+
+    $prev  = $IMAP->get_uid($seq + 1);
+    $first = $IMAP->get_uid($cnt);
+    $next  = $IMAP->get_uid($seq - 1);
+    $last  = $IMAP->get_uid(1);
+}
+else {
+    // Only if we use custom sorting
+    $a_msg_index = $IMAP->message_index(NULL, $_SESSION['sort_col'], $_SESSION['sort_order']);
+
+    $index = array_search($IMAP->get_id($uid), $a_msg_index);
+
+    $count = count($a_msg_index);
+    $prev  = isset($a_msg_index[$index-1]) ? $IMAP->get_uid($a_msg_index[$index-1]) : -1;
+    $first = $count > 1 ? $IMAP->get_uid($a_msg_index[0]) : -1;
+    $next  = isset($a_msg_index[$index+1]) ? $IMAP->get_uid($a_msg_index[$index+1]) : -1;
+    $last  = $count > 1 ? $IMAP->get_uid($a_msg_index[$count-1]) : -1;
+}
+
+// Set UIDs and activate navigation buttons
+if ($prev > 0) {
+    $OUTPUT->set_env('prev_uid', $prev);
+    $OUTPUT->command('enable_command', 'previousmessage', 'firstmessage', true);
+}
+if ($next > 0) {
+    $OUTPUT->set_env('next_uid', $next);
+    $OUTPUT->command('enable_command', 'nextmessage', 'lastmessage', true);
+}
+if ($first > 0)
+    $OUTPUT->set_env('first_uid', $first);
+if ($last > 0)
+    $OUTPUT->set_env('last_uid', $last);
+
+// Don't need a real messages count value
+$OUTPUT->set_env('messagecount', 1);
+
+// Set rowcount text
+$OUTPUT->command('set_rowcount', rcube_label(array(
+    'name' => 'messagenrof',
+    'vars' => array('nr'  => $index+1, 'count' => $cnt)
+)));
+
+$OUTPUT->send();
+