Add Preferences > Mailbox View > Main Options > Layout (#5829)

CHANGELOG

@@ -18,6 +18,7 @@ CHANGELOG Roundcube Webmail
 - Use 7bit encoding for ISO-2022-* charsets in sent mail (#5640)
 - Fix so links over images are not removed in plain text signatures converted from HTML (#4473)
 - Fix various issues when downloading files with names containing non-ascii chars, use RFC 2231 (#5772)
+- Add Preferences > Mailbox View > Main Options > Layout (#5829)
 - Password: Fix compatibility with PHP 7+ in cpanel_webmail driver (#5820)
 - Fix decoding non-ascii attachment names from TNEF attachments (#5646, #5799)
 - Fix uninitialized string offset in rcube_utils::bin2ascii() and make sure rcube_utils::random_bytes() result has always requested length (#5788)

program/localization/en_US/labels.inc

@@ -207,6 +207,9 @@ $labels['layout'] = 'Layout';
 $labels['layoutwidescreen'] = 'Widescreen';
 $labels['layoutdesktop'] = 'Desktop';
 $labels['layoutlist'] = 'List';
+$labels['layoutwidescreendesc'] = 'Widescreen (3-column view)';
+$labels['layoutdesktopdesc'] = 'Desktop (wide list and mail preview below)';
+$labels['layoutlistdesc'] = 'List (no mail preview)';
 
 $labels['folderactions'] = 'Folder actions...';
 $labels['compact'] = 'Compact';

program/steps/settings/func.inc

@@ -410,6 +410,24 @@ function rcmail_user_prefs($current = null)
                 'advanced'    => array('name' => rcube::Q($RCMAIL->gettext('advancedoptions'))),
             );
 
+            if (!isset($no_override['layout'])) {
+                if (!$current) {
+                    continue 2;
+                }
+
+                $field_id = 'rcmfd_layout';
+                $select   = new html_select(array('name' => '_layout', 'id' => $field_id));
+
+                $select->add($RCMAIL->gettext('layoutwidescreendesc'), 'widescreen');
+                $select->add($RCMAIL->gettext('layoutdesktopdesc'), 'desktop');
+                $select->add($RCMAIL->gettext('layoutlistdesc'), 'list');
+
+                $blocks['main']['options']['date_format'] = array(
+                    'title'   => html::label($field_id, rcube::Q($RCMAIL->gettext('layout'))),
+                    'content' => $select->show($config['layout'] ?: 'widescreen'),
+                );
+            }
+
             // show config parameter for auto marking the previewed message as read
             if (!isset($no_override['mail_read_time'])) {
                 if (!$current) {

program/steps/settings/save_prefs.inc

@@ -48,6 +48,7 @@ case 'general':
 
 case 'mailbox':
     $a_user_prefs = array(
+        'layout'               => rcmail_prefs_input('layout', '/^[a-z]+$/'),
         'mail_read_time'       => intval($_POST['_mail_read_time']),
         'autoexpand_threads'   => intval($_POST['_autoexpand_threads']),
         'mdn_requests'         => intval($_POST['_mdn_requests']),