diff program/steps/mail/func.inc @ 0:4681f974d28b

vanilla 1.3.3 distro, I hope
author Charlie Root
date Thu, 04 Jan 2018 15:52:31 -0500
parents
children 0cac1d1e799f
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/steps/mail/func.inc	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,2376 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | program/steps/mail/func.inc                                           |
+ |                                                                       |
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2014, The Roundcube Dev Team                       |
+ |                                                                       |
+ | Licensed under the GNU General Public License version 3 or            |
+ | any later version with exceptions for skins & plugins.                |
+ | See the README file for a full license statement.                     |
+ |                                                                       |
+ | PURPOSE:                                                              |
+ |   Provide webmail functionality and GUI objects                       |
+ |                                                                       |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com>                        |
+ | Author: Aleksander Machniak <alec@alec.pl>                            |
+ +-----------------------------------------------------------------------+
+*/
+
+// always instantiate storage object (but not connect to server yet)
+$RCMAIL->storage_init();
+
+// init environment - set current folder, page, list mode
+rcmail_init_env();
+
+// set message set for search result
+if (!empty($_REQUEST['_search']) && isset($_SESSION['search'])
+    && $_SESSION['search_request'] == $_REQUEST['_search']
+) {
+    $RCMAIL->storage->set_search_set($_SESSION['search']);
+
+    $OUTPUT->set_env('search_request', $_REQUEST['_search']);
+    $OUTPUT->set_env('search_text', $_SESSION['last_text_search']);
+}
+
+// remove mbox part from _uid
+if (($_uid  = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_GPC)) && !is_array($_uid) && preg_match('/^\d+-.+/', $_uid)) {
+  list($_uid, $mbox) = explode('-', $_uid, 2);
+  if (isset($_GET['_uid']))  $_GET['_uid']  = $_uid;
+  if (isset($_POST['_uid'])) $_POST['_uid'] = $_uid;
+  $_REQUEST['_uid'] = $_uid;
+  unset($_uid);
+
+  // override mbox
+  if (!empty($mbox)) {
+    $_GET['_mbox']  = $mbox;
+    $_POST['_mbox'] = $mbox;
+    $RCMAIL->storage->set_folder(($_SESSION['mbox'] = $mbox));
+  }
+}
+
+if (!empty($_SESSION['browser_caps']) && !$OUTPUT->ajax_call) {
+    $OUTPUT->set_env('browser_capabilities', $_SESSION['browser_caps']);
+}
+
+// set main env variables, labels and page title
+if (empty($RCMAIL->action) || $RCMAIL->action == 'list') {
+    // connect to storage server and trigger error on failure
+    $RCMAIL->storage_connect();
+
+    $mbox_name = $RCMAIL->storage->get_folder();
+
+    if (empty($RCMAIL->action)) {
+        $OUTPUT->set_env('search_mods', rcmail_search_mods());
+
+        if (!empty($_SESSION['search_scope']))
+            $OUTPUT->set_env('search_scope', $_SESSION['search_scope']);
+
+        rcmail_list_pagetitle();
+    }
+
+    $threading = (bool) $RCMAIL->storage->get_threading();
+    $delimiter = $RCMAIL->storage->get_hierarchy_delimiter();
+
+    // set current mailbox and some other vars in client environment
+    $OUTPUT->set_env('mailbox', $mbox_name);
+    $OUTPUT->set_env('pagesize', $RCMAIL->storage->get_pagesize());
+    $OUTPUT->set_env('current_page', max(1, $_SESSION['page']));
+    $OUTPUT->set_env('delimiter', $delimiter);
+    $OUTPUT->set_env('threading', $threading);
+    $OUTPUT->set_env('threads', $threading || $RCMAIL->storage->get_capability('THREAD'));
+    $OUTPUT->set_env('reply_all_mode', (int) $RCMAIL->config->get('reply_all_mode'));
+    $OUTPUT->set_env('layout', $RCMAIL->config->get('layout') ?: 'widescreen');
+
+    if ($RCMAIL->storage->get_capability('QUOTA')) {
+        $OUTPUT->set_env('quota', true);
+    }
+
+    // set special folders
+    foreach (array('drafts', 'trash', 'junk') as $mbox) {
+        if ($folder = $RCMAIL->config->get($mbox . '_mbox')) {
+            $OUTPUT->set_env($mbox . '_mailbox', $folder);
+        }
+    }
+
+    if (!empty($_GET['_uid'])) {
+        $OUTPUT->set_env('list_uid', $_GET['_uid']);
+    }
+
+    // set configuration
+    $RCMAIL->set_env_config(array('delete_junk', 'flag_for_deletion', 'read_when_deleted',
+        'skip_deleted', 'display_next', 'message_extwin', 'forward_attachment'));
+
+    if (!$OUTPUT->ajax_call) {
+        $OUTPUT->add_label('checkingmail', 'deletemessage', 'movemessagetotrash',
+            'movingmessage', 'copyingmessage', 'deletingmessage', 'markingmessage',
+            'copy', 'move', 'quota', 'replyall', 'replylist', 'stillsearching',
+            'flagged', 'unflagged', 'unread', 'deleted', 'replied', 'forwarded',
+            'priority', 'withattachment', 'fileuploaderror', 'mark', 'markallread',
+            'folders-cur', 'folders-sub', 'folders-all', 'cancel');
+    }
+}
+
+// register UI objects
+$OUTPUT->add_handlers(array(
+    'mailboxlist'         => array($RCMAIL, 'folder_list'),
+    'quotadisplay'        => array($RCMAIL, 'quota_display'),
+    'messages'            => 'rcmail_message_list',
+    'messagecountdisplay' => 'rcmail_messagecount_display',
+    'listmenulink'        => 'rcmail_options_menu_link',
+    'mailboxname'         => 'rcmail_mailbox_name_display',
+    'messageheaders'      => 'rcmail_message_headers',
+    'messagefullheaders'  => 'rcmail_message_full_headers',
+    'messagebody'         => 'rcmail_message_body',
+    'messagecontentframe' => 'rcmail_messagecontent_frame',
+    'messageimportform'   => 'rcmail_message_import_form',
+    'searchfilter'        => 'rcmail_search_filter',
+    'searchinterval'      => 'rcmail_search_interval',
+    'searchform'          => array($OUTPUT, 'search_form'),
+));
+
+// register action aliases
+$RCMAIL->register_action_map(array(
+    'refresh' => 'check_recent.inc',
+    'preview' => 'show.inc',
+    'print'   => 'show.inc',
+    'move'    => 'move_del.inc',
+    'delete'  => 'move_del.inc',
+    'send'    => 'sendmail.inc',
+    'expunge' => 'folders.inc',
+    'purge'   => 'folders.inc',
+    'remove-attachment'  => 'attachments.inc',
+    'rename-attachment'  => 'attachments.inc',
+    'display-attachment' => 'attachments.inc',
+    'upload'             => 'attachments.inc',
+    'group-expand'       => 'autocomplete.inc',
+));
+
+
+/**
+ * Sets storage properties and session
+ */
+function rcmail_init_env()
+{
+    global $RCMAIL;
+
+    $default_threading  = $RCMAIL->config->get('default_list_mode', 'list') == 'threads';
+    $a_threading        = $RCMAIL->config->get('message_threading', array());
+    $message_sort_col   = $RCMAIL->config->get('message_sort_col');
+    $message_sort_order = $RCMAIL->config->get('message_sort_order');
+
+    // set imap properties and session vars
+    if (!strlen($mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_GPC, true))) {
+        $mbox = strlen($_SESSION['mbox']) ? $_SESSION['mbox'] : 'INBOX';
+    }
+
+    // we handle 'page' argument on 'list' and 'getunread' to prevent from
+    // race condition and unintentional page overwrite in session
+    if ($RCMAIL->action == 'list' || $RCMAIL->action == 'getunread') {
+        if (!($page = intval($_GET['_page']))) {
+            $page = $_SESSION['page'] ?: 1;
+        }
+
+        $_SESSION['page'] = $page;
+    }
+
+    $RCMAIL->storage->set_folder($_SESSION['mbox'] = $mbox);
+    $RCMAIL->storage->set_page($_SESSION['page']);
+
+    // set default sort col/order to session
+    if (!isset($_SESSION['sort_col'])) {
+        $_SESSION['sort_col'] = $message_sort_col ?: '';
+    }
+    if (!isset($_SESSION['sort_order'])) {
+        $_SESSION['sort_order'] = strtoupper($message_sort_order) == 'ASC' ? 'ASC' : 'DESC';
+    }
+
+    // set threads mode
+    if (isset($_GET['_threads'])) {
+        if ($_GET['_threads']) {
+            // re-set current page number when listing mode changes
+            if (!$a_threading[$_SESSION['mbox']]) {
+                $RCMAIL->storage->set_page($_SESSION['page'] = 1);
+            }
+
+            $a_threading[$_SESSION['mbox']] = true;
+        }
+        else {
+            // re-set current page number when listing mode changes
+            if ($a_threading[$_SESSION['mbox']]) {
+                $RCMAIL->storage->set_page($_SESSION['page'] = 1);
+            }
+
+            $a_threading[$_SESSION['mbox']] = false;
+        }
+
+        $RCMAIL->user->save_prefs(array('message_threading' => $a_threading));
+    }
+
+    $threading = isset($a_threading[$_SESSION['mbox']]) ? $a_threading[$_SESSION['mbox']] : $default_threading;
+
+    $RCMAIL->storage->set_threading($threading);
+}
+
+/**
+ * Sets page title
+ */
+function rcmail_list_pagetitle()
+{
+    global $RCMAIL;
+
+    if ($RCMAIL->output->get_env('search_request')) {
+        $pagetitle = $RCMAIL->gettext('searchresult');
+    }
+    else {
+        $mbox_name = $RCMAIL->output->get_env('mailbox') ?: $RCMAIL->storage->get_folder();
+        $delimiter = $RCMAIL->storage->get_hierarchy_delimiter();
+        $pagetitle = $RCMAIL->localize_foldername($mbox_name, true);
+        $pagetitle = str_replace($delimiter, " \xC2\xBB ", $pagetitle);
+    }
+
+    $RCMAIL->output->set_pagetitle($pagetitle);
+}
+
+/**
+ * Returns default search mods
+ */
+function rcmail_search_mods()
+{
+    global $RCMAIL;
+
+    $mods = $RCMAIL->config->get('search_mods');
+
+    if (empty($mods)) {
+        $mods = array('*' => array('subject' => 1, 'from' => 1));
+
+        foreach (array('sent', 'drafts') as $mbox) {
+            if ($mbox = $RCMAIL->config->get($mbox . '_mbox')) {
+                $mods[$mbox] = array('subject' => 1, 'to' => 1);
+            }
+        }
+    }
+
+    return $mods;
+}
+
+/**
+ * Returns 'to' if current folder is configured Sent or Drafts
+ * or their subfolders, otherwise returns 'from'.
+ *
+ * @return string Column name
+ */
+function rcmail_message_list_smart_column_name()
+{
+    global $RCMAIL;
+
+    $delim       = $RCMAIL->storage->get_hierarchy_delimiter();
+    $mbox        = $RCMAIL->output->get_env('mailbox') ?: $RCMAIL->storage->get_folder();
+    $sent_mbox   = $RCMAIL->config->get('sent_mbox');
+    $drafts_mbox = $RCMAIL->config->get('drafts_mbox');
+
+    if ((strpos($mbox.$delim, $sent_mbox.$delim) === 0 || strpos($mbox.$delim, $drafts_mbox.$delim) === 0)
+        && strtoupper($mbox) != 'INBOX'
+    ) {
+        return 'to';
+    }
+
+    return 'from';
+}
+
+/**
+ * Returns configured messages list sorting column name
+ * The name is context-sensitive, which means if sorting is set to 'fromto'
+ * it will return 'from' or 'to' according to current folder type.
+ *
+ * @return string Column name
+ */
+function rcmail_sort_column()
+{
+    global $RCMAIL;
+
+    if (isset($_SESSION['sort_col'])) {
+        $column = $_SESSION['sort_col'];
+    }
+    else {
+        $column = $RCMAIL->config->get('message_sort_col');
+    }
+
+    // get name of smart From/To column in folder context
+    if ($column == 'fromto') {
+        $column = rcmail_message_list_smart_column_name();
+    }
+
+    return $column;
+}
+
+/**
+ * Returns configured message list sorting order
+ *
+ * @return string Sorting order (ASC|DESC)
+ */
+function rcmail_sort_order()
+{
+    global $RCMAIL;
+
+    if (isset($_SESSION['sort_order'])) {
+        return $_SESSION['sort_order'];
+    }
+
+    return $RCMAIL->config->get('message_sort_order');
+}
+
+/**
+ * return the message list as HTML table
+ */
+function rcmail_message_list($attrib)
+{
+    global $RCMAIL, $OUTPUT;
+
+    // add some labels to client
+    $OUTPUT->add_label('from', 'to');
+
+    // add id to message list table if not specified
+    if (!strlen($attrib['id'])) {
+        $attrib['id'] = 'rcubemessagelist';
+    }
+
+    // define list of cols to be displayed based on parameter or config
+    if (empty($attrib['columns'])) {
+        $list_cols   = $RCMAIL->config->get('list_cols');
+        $a_show_cols = !empty($list_cols) && is_array($list_cols) ? $list_cols : array('subject');
+
+        $OUTPUT->set_env('col_movable', !in_array('list_cols', (array)$RCMAIL->config->get('dont_override')));
+    }
+    else {
+        $a_show_cols = preg_split('/[\s,;]+/', str_replace(array("'", '"'), '', $attrib['columns']));
+        $attrib['columns'] = $a_show_cols;
+    }
+
+    // save some variables for use in ajax list
+    $_SESSION['list_attrib'] = $attrib;
+
+    // make sure 'threads' and 'subject' columns are present
+    if (!in_array('subject', $a_show_cols))
+        array_unshift($a_show_cols, 'subject');
+    if (!in_array('threads', $a_show_cols))
+        array_unshift($a_show_cols, 'threads');
+
+    $listcols = $a_show_cols;
+
+    // Widescreen layout uses hardcoded list of columns
+    if ($RCMAIL->config->get('layout', 'widescreen') == 'widescreen') {
+        $a_show_cols = array('threads', 'subject', 'fromto', 'date', 'flag', 'attachment');
+        $listcols    = $a_show_cols;
+        array_shift($listcols);
+    }
+
+    // set client env
+    $OUTPUT->add_gui_object('messagelist', $attrib['id']);
+    $OUTPUT->set_env('autoexpand_threads', intval($RCMAIL->config->get('autoexpand_threads')));
+    $OUTPUT->set_env('sort_col', $_SESSION['sort_col']);
+    $OUTPUT->set_env('sort_order', $_SESSION['sort_order']);
+    $OUTPUT->set_env('messages', array());
+    $OUTPUT->set_env('listcols', $listcols);
+
+    $OUTPUT->include_script('list.js');
+
+    $table = new html_table($attrib);
+
+    if (!$attrib['noheader']) {
+        foreach (rcmail_message_list_head($attrib, $a_show_cols) as $cell)
+            $table->add_header(array('class' => $cell['className'], 'id' => $cell['id']), $cell['html']);
+    }
+
+    return $table->show();
+}
+
+/**
+ * return javascript commands to add rows to the message list
+ */
+function rcmail_js_message_list($a_headers, $insert_top=false, $a_show_cols=null)
+{
+    global $RCMAIL, $OUTPUT;
+
+    if (empty($a_show_cols)) {
+        if (!empty($_SESSION['list_attrib']['columns']))
+            $a_show_cols = $_SESSION['list_attrib']['columns'];
+        else {
+            $list_cols   = $RCMAIL->config->get('list_cols');
+            $a_show_cols = !empty($list_cols) && is_array($list_cols) ? $list_cols : array('subject');
+        }
+    }
+    else {
+        if (!is_array($a_show_cols)) {
+            $a_show_cols = preg_split('/[\s,;]+/', str_replace(array("'", '"'), '', $a_show_cols));
+        }
+        $head_replace = true;
+    }
+
+    $delimiter   = $RCMAIL->storage->get_hierarchy_delimiter();
+    $search_set  = $RCMAIL->storage->get_search_set();
+    $multifolder = $search_set && $search_set[1]->multi;
+
+    // add/remove 'folder' column to the list on multi-folder searches
+    if ($multifolder && !in_array('folder', $a_show_cols)) {
+        $a_show_cols[] = 'folder';
+        $head_replace = true;
+    }
+    else if (!$multifolder && ($found = array_search('folder', $a_show_cols)) !== false) {
+        unset($a_show_cols[$found]);
+        $head_replace = true;
+    }
+
+    $mbox = $RCMAIL->output->get_env('mailbox') ?: $RCMAIL->storage->get_folder();
+
+    // make sure 'threads' and 'subject' columns are present
+    if (!in_array('subject', $a_show_cols))
+        array_unshift($a_show_cols, 'subject');
+    if (!in_array('threads', $a_show_cols))
+        array_unshift($a_show_cols, 'threads');
+
+    // Make sure there are no duplicated columns (#1486999)
+    $a_show_cols = array_unique($a_show_cols);
+    $_SESSION['list_attrib']['columns'] = $a_show_cols;
+
+    // Widescreen layout uses hardcoded list of columns
+    if ($RCMAIL->config->get('layout', 'widescreen') == 'widescreen') {
+        $a_show_cols = array('threads', 'subject', 'fromto', 'date', 'flag', 'attachment');
+    }
+
+    // Plugins may set header's list_cols/list_flags and other rcube_message_header variables
+    // and list columns
+    $plugin = $RCMAIL->plugins->exec_hook('messages_list',
+        array('messages' => $a_headers, 'cols' => $a_show_cols));
+
+    $a_show_cols = $plugin['cols'];
+    $a_headers   = $plugin['messages'];
+
+    if ($RCMAIL->config->get('layout', 'widescreen') == 'widescreen') {
+        if (!$RCMAIL->storage->get_threading()) {
+            if (($idx = array_search('threads', $a_show_cols)) !== false) {
+                unset($a_show_cols[$idx]);
+            }
+        }
+    }
+
+    $thead = $head_replace ? rcmail_message_list_head($_SESSION['list_attrib'], $a_show_cols) : NULL;
+
+    // get name of smart From/To column in folder context
+    if (array_search('fromto', $a_show_cols) !== false) {
+        $smart_col = rcmail_message_list_smart_column_name();
+    }
+
+    $OUTPUT->command('set_message_coltypes', array_values($a_show_cols), $thead, $smart_col);
+
+    if ($multifolder && $_SESSION['search_scope'] == 'all') {
+        $OUTPUT->command('select_folder', '');
+    }
+
+    $OUTPUT->set_env('multifolder_listing', $multifolder);
+
+    if (empty($a_headers)) {
+        return;
+    }
+
+    // remove 'threads', 'attachment', 'flag', 'status' columns, we don't need them here
+    foreach (array('threads', 'attachment', 'flag', 'status', 'priority') as $col) {
+        if (($key = array_search($col, $a_show_cols)) !== FALSE) {
+            unset($a_show_cols[$key]);
+        }
+    }
+
+    $sort_col = $_SESSION['sort_col'];
+
+    // loop through message headers
+    foreach ($a_headers as $header) {
+        if (empty($header) || !$header->size) {
+            continue;
+        }
+
+        // make message UIDs unique by appending the folder name
+        if ($multifolder) {
+            $header->uid .= '-'.$header->folder;
+            $header->flags['skip_mbox_check'] = true;
+            if ($header->parent_uid)
+                $header->parent_uid .= '-'.$header->folder;
+        }
+
+        $a_msg_cols  = array();
+        $a_msg_flags = array();
+
+        // format each col; similar as in rcmail_message_list()
+        foreach ($a_show_cols as $col) {
+            $col_name = $col == 'fromto' ? $smart_col : $col;
+
+            if (in_array($col_name, array('from', 'to', 'cc', 'replyto'))) {
+                $cont = rcmail_address_string($header->$col_name, 3, false, null, $header->charset);
+                if (empty($cont)) $cont = '&nbsp;'; // for widescreen mode
+            }
+            else if ($col == 'subject') {
+                $cont = trim(rcube_mime::decode_header($header->$col, $header->charset));
+                if (!$cont) $cont = $RCMAIL->gettext('nosubject');
+                $cont = rcube::Q($cont);
+            }
+            else if ($col == 'size')
+                $cont = $RCMAIL->show_bytes($header->$col);
+            else if ($col == 'date')
+                $cont = $RCMAIL->format_date($sort_col == 'arrival' ? $header->internaldate : $header->date);
+            else if ($col == 'folder') {
+                if ($last_folder !== $header->folder) {
+                    $last_folder      = $header->folder;
+                    $last_folder_name = $RCMAIL->localize_foldername($last_folder, true);
+                    $last_folder_name = str_replace($delimiter, " \xC2\xBB ", $last_folder_name);
+                }
+
+                $cont = rcube::Q($last_folder_name);
+            }
+            else
+                $cont = rcube::Q($header->$col);
+
+            $a_msg_cols[$col] = $cont;
+        }
+
+        $a_msg_flags = array_change_key_case(array_map('intval', (array) $header->flags));
+        if ($header->depth)
+            $a_msg_flags['depth'] = $header->depth;
+        else if ($header->has_children)
+            $roots[] = $header->uid;
+        if ($header->parent_uid)
+            $a_msg_flags['parent_uid'] = $header->parent_uid;
+        if ($header->has_children)
+            $a_msg_flags['has_children'] = $header->has_children;
+        if ($header->unread_children)
+            $a_msg_flags['unread_children'] = $header->unread_children;
+        if ($header->flagged_children)
+            $a_msg_flags['flagged_children'] = $header->flagged_children;
+        if ($header->others['list-post'])
+            $a_msg_flags['ml'] = 1;
+        if ($header->priority)
+            $a_msg_flags['prio'] = (int) $header->priority;
+
+        $a_msg_flags['ctype'] = rcube::Q($header->ctype);
+        $a_msg_flags['mbox']  = $header->folder;
+
+        // merge with plugin result (Deprecated, use $header->flags)
+        if (!empty($header->list_flags) && is_array($header->list_flags))
+            $a_msg_flags = array_merge($a_msg_flags, $header->list_flags);
+        if (!empty($header->list_cols) && is_array($header->list_cols))
+            $a_msg_cols = array_merge($a_msg_cols, $header->list_cols);
+
+        $OUTPUT->command('add_message_row', $header->uid, $a_msg_cols, $a_msg_flags, $insert_top);
+    }
+
+    if ($RCMAIL->storage->get_threading()) {
+        $OUTPUT->command('init_threads', (array) $roots, $mbox);
+    }
+}
+
+/*
+ * Creates <THEAD> for message list table
+ */
+function rcmail_message_list_head($attrib, $a_show_cols)
+{
+    global $RCMAIL;
+
+    // check to see if we have some settings for sorting
+    $sort_col   = $_SESSION['sort_col'];
+    $sort_order = $_SESSION['sort_order'];
+
+    $dont_override  = (array) $RCMAIL->config->get('dont_override');
+    $disabled_sort  = in_array('message_sort_col', $dont_override);
+    $disabled_order = in_array('message_sort_order', $dont_override);
+
+    $RCMAIL->output->set_env('disabled_sort_col', $disabled_sort);
+    $RCMAIL->output->set_env('disabled_sort_order', $disabled_order);
+
+    // define sortable columns
+    if ($disabled_sort)
+        $a_sort_cols = $sort_col && !$disabled_order ? array($sort_col) : array();
+    else
+        $a_sort_cols = array('subject', 'date', 'from', 'to', 'fromto', 'size', 'cc');
+
+    if (!empty($attrib['optionsmenuicon'])) {
+        $list_menu = rcmail_options_menu_link($attrib);
+    }
+
+    $cells = $coltypes = array();
+
+    // get name of smart From/To column in folder context
+    if (array_search('fromto', $a_show_cols) !== false) {
+        $smart_col = rcmail_message_list_smart_column_name();
+    }
+
+    foreach ($a_show_cols as $col) {
+        $label    = '';
+        $sortable = false;
+        $rel_col  = $col == 'date' && $sort_col == 'arrival' ? 'arrival' : $col;
+
+        // get column name
+        switch ($col) {
+        case 'flag':
+            $col_name = html::span('flagged', $RCMAIL->gettext('flagged'));
+            break;
+        case 'attachment':
+        case 'priority':
+            $col_name = html::span($col, $RCMAIL->gettext($col));
+            break;
+        case 'status':
+            $col_name = html::span($col, $RCMAIL->gettext('readstatus'));
+            break;
+        case 'threads':
+            $col_name = (string) $list_menu;
+            break;
+        case 'fromto':
+            $label    = $RCMAIL->gettext($smart_col);
+            $col_name = rcube::Q($label);
+            break;
+        default:
+            $label    = $RCMAIL->gettext($col);
+            $col_name = rcube::Q($label);
+        }
+
+        // make sort links
+        if (in_array($col, $a_sort_cols)) {
+            $sortable = true;
+            $col_name = html::a(array(
+                    'href'  => "./#sort",
+                    'class' => 'sortcol',
+                    'rel'   => $rel_col,
+                    'title' => $RCMAIL->gettext('sortby')
+                ), $col_name);
+        }
+        else if ($col_name[0] != '<') {
+            $col_name = '<span class="' . $col .'">' . $col_name . '</span>';
+        }
+
+        $sort_class = $rel_col == $sort_col && !$disabled_order ? " sorted$sort_order" : '';
+        $class_name = $col.$sort_class;
+
+        // put it all together
+        $cells[] = array('className' => $class_name, 'id' => "rcm$col", 'html' => $col_name);
+        $coltypes[$col] = array('className' => $class_name, 'id' => "rcm$col", 'label' => $label, 'sortable' => $sortable);
+    }
+
+    $RCMAIL->output->set_env('coltypes', $coltypes);
+    return $cells;
+}
+
+function rcmail_options_menu_link($attrib)
+{
+    global $RCMAIL;
+
+    $onclick = 'return ' . rcmail_output::JS_OBJECT_NAME . ".command('menu-open', 'messagelistmenu', this, event)";
+    $inner   = $title = $RCMAIL->gettext('listoptions');
+
+    if (is_string($attrib['optionsmenuicon']) && $attrib['optionsmenuicon'] != 'true') {
+        $inner = html::img(array('src' => $RCMAIL->output->abs_url($attrib['optionsmenuicon'], true), 'alt' => $title));
+    }
+
+    return html::a(array(
+            'href'     => '#list-options',
+            'onclick'  => $onclick,
+            'class'    => 'listmenu',
+            'id'       => 'listmenulink',
+            'title'    => $title,
+            'tabindex' => '0',
+    ), $inner);
+}
+
+/**
+ * Return an HTML iframe for loading mail content
+ */
+function rcmail_messagecontent_frame($attrib)
+{
+    global $OUTPUT;
+
+    if (empty($attrib['id'])) {
+        $attrib['id'] = 'rcmailcontentwindow';
+    }
+
+    return $OUTPUT->frame($attrib, true);
+}
+
+function rcmail_messagecount_display($attrib)
+{
+    global $RCMAIL;
+
+    if (!$attrib['id']) {
+        $attrib['id'] = 'rcmcountdisplay';
+    }
+
+    $RCMAIL->output->add_gui_object('countdisplay', $attrib['id']);
+
+    $content =  $RCMAIL->action != 'show' ? rcmail_get_messagecount_text() : $RCMAIL->gettext('loading');
+
+    return html::span($attrib, $content);
+}
+
+function rcmail_get_messagecount_text($count = null, $page = null)
+{
+    global $RCMAIL;
+
+    if ($page === null) {
+        $page = $RCMAIL->storage->get_page();
+    }
+
+    $page_size = $RCMAIL->storage->get_pagesize();
+    $start_msg = ($page-1) * $page_size + 1;
+    $max       = $count;
+
+    if ($max === null && $RCMAIL->action) {
+        $max = $RCMAIL->storage->count(null, $RCMAIL->storage->get_threading() ? 'THREADS' : 'ALL');
+    }
+
+    if (!$max) {
+        $out = $RCMAIL->storage->get_search_set() ? $RCMAIL->gettext('nomessages') : $RCMAIL->gettext('mailboxempty');
+    }
+    else {
+        $out = $RCMAIL->gettext(array('name' => $RCMAIL->storage->get_threading() ? 'threadsfromto' : 'messagesfromto',
+            'vars' => array('from'  => $start_msg,
+            'to'    => min($max, $start_msg + $page_size - 1),
+            'count' => $max)));
+    }
+
+    return rcube::Q($out);
+}
+
+function rcmail_mailbox_name_display($attrib)
+{
+    global $RCMAIL;
+
+    if (!$attrib['id']) {
+        $attrib['id'] = 'rcmmailboxname';
+    }
+
+    $RCMAIL->output->add_gui_object('mailboxname', $attrib['id']);
+
+    return html::span($attrib, rcmail_get_mailbox_name_text());
+}
+
+function rcmail_get_mailbox_name_text()
+{
+    global $RCMAIL;
+    return $RCMAIL->localize_foldername($RCMAIL->output->get_env('mailbox') ?: $RCMAIL->storage->get_folder());
+}
+
+function rcmail_send_unread_count($mbox_name, $force=false, $count=null, $mark='')
+{
+    global $RCMAIL;
+
+    $old_unseen = rcmail_get_unseen_count($mbox_name);
+    $unseen     = $count;
+
+    if ($unseen === null) {
+        $unseen = $RCMAIL->storage->count($mbox_name, 'UNSEEN', $force);
+    }
+
+    if ($unseen != $old_unseen || ($mbox_name == 'INBOX')) {
+        $RCMAIL->output->command('set_unread_count', $mbox_name, $unseen,
+            ($mbox_name == 'INBOX'), $unseen && $mark ? $mark : '');
+    }
+
+    rcmail_set_unseen_count($mbox_name, $unseen);
+
+    return $unseen;
+}
+
+function rcmail_set_unseen_count($mbox_name, $count)
+{
+    // @TODO: this data is doubled (session and cache tables) if caching is enabled
+
+    // Make sure we have an array here (#1487066)
+    if (!is_array($_SESSION['unseen_count'])) {
+        $_SESSION['unseen_count'] = array();
+    }
+
+    $_SESSION['unseen_count'][$mbox_name] = $count;
+}
+
+function rcmail_get_unseen_count($mbox_name)
+{
+    if (is_array($_SESSION['unseen_count']) && array_key_exists($mbox_name, $_SESSION['unseen_count'])) {
+        return $_SESSION['unseen_count'][$mbox_name];
+    }
+}
+
+/**
+ * Sets message is_safe flag according to 'show_images' option value
+ *
+ * @param object rcube_message Message
+ */
+function rcmail_check_safe($message)
+{
+    global $RCMAIL;
+
+    if (!$message->is_safe
+        && ($show_images = $RCMAIL->config->get('show_images'))
+        && $message->has_html_part()
+    ) {
+        switch ($show_images) {
+        case 1: // known senders only
+            // get default addressbook, like in addcontact.inc
+            $CONTACTS = $RCMAIL->get_address_book(-1, true);
+
+            if ($CONTACTS && $message->sender['mailto']) {
+                $result = $CONTACTS->search('email', $message->sender['mailto'], 1, false);
+                if ($result->count) {
+                    $message->set_safe(true);
+                }
+            }
+
+            $RCMAIL->plugins->exec_hook('message_check_safe', array('message' => $message));
+            break;
+
+        case 2: // always
+            $message->set_safe(true);
+            break;
+        }
+    }
+
+    return !empty($message->is_safe);
+}
+
+/**
+ * Cleans up the given message HTML Body (for displaying)
+ *
+ * @param string HTML
+ * @param array  Display parameters 
+ * @param array  CID map replaces (inline images)
+ * @return string Clean HTML
+ */
+function rcmail_wash_html($html, $p, $cid_replaces = array())
+{
+    global $REMOTE_OBJECTS;
+
+    $p += array('safe' => false, 'inline_html' => true);
+
+    // charset was converted to UTF-8 in rcube_storage::get_message_part(),
+    // change/add charset specification in HTML accordingly,
+    // washtml cannot work without that
+    $meta = '<meta http-equiv="Content-Type" content="text/html; charset='.RCUBE_CHARSET.'" />';
+
+    // remove old meta tag and add the new one, making sure
+    // that it is placed in the head (#1488093)
+    $html = preg_replace('/<meta[^>]+charset=[a-z0-9-_]+[^>]*>/Ui', '', $html);
+    $html = preg_replace('/(<head[^>]*>)/Ui', '\\1'.$meta, $html, -1, $rcount);
+    if (!$rcount) {
+        $html = '<head>' . $meta . '</head>' . $html;
+    }
+
+    // clean HTML with washhtml by Frederic Motte
+    $wash_opts = array(
+        'show_washed'   => false,
+        'allow_remote'  => $p['safe'],
+        'blocked_src'   => 'program/resources/blocked.gif',
+        'charset'       => RCUBE_CHARSET,
+        'cid_map'       => $cid_replaces,
+        'html_elements' => array('body'),
+    );
+
+    if (!$p['inline_html']) {
+        $wash_opts['html_elements'] = array('html','head','title','body');
+    }
+    if ($p['safe']) {
+        $wash_opts['html_elements'][] = 'link';
+        $wash_opts['html_attribs'] = array('rel','type');
+    }
+
+    // overwrite washer options with options from plugins
+    if (isset($p['html_elements']))
+        $wash_opts['html_elements'] = $p['html_elements'];
+    if (isset($p['html_attribs']))
+        $wash_opts['html_attribs'] = $p['html_attribs'];
+
+    // initialize HTML washer
+    $washer = new rcube_washtml($wash_opts);
+
+    if (!$p['skip_washer_form_callback']) {
+        $washer->add_callback('form', 'rcmail_washtml_callback');
+    }
+
+    // allow CSS styles, will be sanitized by rcmail_washtml_callback()
+    if (!$p['skip_washer_style_callback']) {
+        $washer->add_callback('style', 'rcmail_washtml_callback');
+    }
+
+    // modify HTML links to open a new window if clicked
+    if (!$p['skip_washer_link_callback']) {
+        $washer->add_callback('a', 'rcmail_washtml_link_callback');
+        $washer->add_callback('area', 'rcmail_washtml_link_callback');
+
+        if ($p['safe'])
+            $washer->add_callback('link', 'rcmail_washtml_link_callback');
+    }
+
+    // Remove non-UTF8 characters (#1487813)
+    $html = rcube_charset::clean($html);
+
+    $html = $washer->wash($html);
+    $REMOTE_OBJECTS = $washer->extlinks;
+
+    return $html;
+}
+
+/**
+ * Convert the given message part to proper HTML
+ * which can be displayed the message view
+ *
+ * @param string             Message part body
+ * @param rcube_message_part Message part
+ * @param array              Display parameters array
+ *
+ * @return string Formatted HTML string
+ */
+function rcmail_print_body($body, $part, $p = array())
+{
+    global $RCMAIL;
+
+    // trigger plugin hook
+    $data = $RCMAIL->plugins->exec_hook('message_part_before',
+        array('type' => $part->ctype_secondary, 'body' => $body, 'id' => $part->mime_id)
+            + $p + array('safe' => false, 'plain' => false, 'inline_html' => true));
+
+    // convert html to text/plain
+    if ($data['plain'] && ($data['type'] == 'html' || $data['type'] == 'enriched')) {
+        if ($data['type'] == 'enriched') {
+            $data['body'] = rcube_enriched::to_html($data['body']);
+        }
+
+        $body = $RCMAIL->html2text($data['body']);
+        $part->ctype_secondary = 'plain';
+    }
+    // text/html
+    else if ($data['type'] == 'html') {
+        $body = rcmail_wash_html($data['body'], $data, $part->replaces);
+        $part->ctype_secondary = $data['type'];
+    }
+    // text/enriched
+    else if ($data['type'] == 'enriched') {
+        $body = rcube_enriched::to_html($data['body']);
+        $body = rcmail_wash_html($body, $data, $part->replaces);
+        $part->ctype_secondary = 'html';
+    }
+    else {
+        // assert plaintext
+        $body = $data['body'];
+        $part->ctype_secondary = $data['type'] = 'plain';
+    }
+
+    // free some memory (hopefully)
+    unset($data['body']);
+
+    // plaintext postprocessing
+    if ($part->ctype_secondary == 'plain') {
+        $flowed = $part->ctype_parameters['format'] == 'flowed';
+        $delsp = $part->ctype_parameters['delsp'] == 'yes';
+        $body = rcmail_plain_body($body, $flowed, $delsp);
+    }
+
+    // allow post-processing of the message body
+    $data = $RCMAIL->plugins->exec_hook('message_part_after',
+        array('type' => $part->ctype_secondary, 'body' => $body, 'id' => $part->mime_id) + $data);
+
+    return $data['body'];
+}
+
+/**
+ * Handle links and citation marks in plain text message
+ *
+ * @param string  Plain text string
+ * @param boolean Set to True if the source text is in format=flowed
+ *
+ * @return string Formatted HTML string
+ */
+function rcmail_plain_body($body, $flowed = false, $delsp = false)
+{
+    $options   = array('flowed' => $flowed, 'wrap' => !$flowed, 'replacer' => 'rcmail_string_replacer',
+        'delsp' => $delsp);
+    $text2html = new rcube_text2html($body, false, $options);
+    $body      = $text2html->get_html();
+
+    return $body;
+}
+
+/**
+ * Callback function for washtml cleaning class
+ */
+function rcmail_washtml_callback($tagname, $attrib, $content, $washtml)
+{
+    switch ($tagname) {
+    case 'form':
+        $out = html::div('form', $content);
+        break;
+
+    case 'style':
+        // Crazy big styles may freeze the browser (#1490539)
+        // remove content with more than 5k lines
+        if (substr_count($content, "\n") > 5000) {
+            $out = '';
+            break;
+        }
+
+        // decode all escaped entities and reduce to ascii strings
+        $stripped = preg_replace('/[^a-zA-Z\(:;]/', '', rcube_utils::xss_entity_decode($content));
+
+        // now check for evil strings like expression, behavior or url()
+        if (!preg_match('/expression|behavior|javascript:|import[^a]/i', $stripped)) {
+            if (!$washtml->get_config('allow_remote') && preg_match('/url\((?!data:image)/', $stripped)) {
+                $washtml->extlinks = true;
+            }
+            else {
+                $out = html::tag('style', array('type' => 'text/css'), $content);
+            }
+            break;
+        }
+
+    default:
+        $out = '';
+    }
+
+    return $out;
+}
+
+/**
+ * return table with message headers
+ */
+function rcmail_message_headers($attrib, $headers=null)
+{
+    global $MESSAGE, $PRINT_MODE, $RCMAIL;
+    static $sa_attrib;
+
+    // keep header table attrib
+    if (is_array($attrib) && !$sa_attrib && !$attrib['valueof']) {
+        $sa_attrib = $attrib;
+    }
+    else if (!is_array($attrib) && is_array($sa_attrib)) {
+        $attrib = $sa_attrib;
+    }
+
+    if (!isset($MESSAGE)) {
+        return false;
+    }
+
+    // get associative array of headers object
+    if (!$headers) {
+        $headers_obj = $MESSAGE->headers;
+        $headers     = get_object_vars($MESSAGE->headers);
+    }
+    else if (is_object($headers)) {
+        $headers_obj = $headers;
+        $headers     = get_object_vars($headers_obj);
+    }
+    else {
+        $headers_obj = rcube_message_header::from_array($headers);
+    }
+
+    // show these headers
+    $standard_headers = array('subject', 'from', 'sender', 'to', 'cc', 'bcc', 'replyto',
+        'mail-reply-to', 'mail-followup-to', 'date', 'priority');
+    $exclude_headers = $attrib['exclude'] ? explode(',', $attrib['exclude']) : array();
+    $output_headers  = array();
+
+    foreach ($standard_headers as $hkey) {
+        if ($headers[$hkey])
+            $value = $headers[$hkey];
+        else if ($headers['others'][$hkey])
+            $value = $headers['others'][$hkey];
+        else if (!$attrib['valueof'])
+            continue;
+
+        if (in_array($hkey, $exclude_headers))
+            continue;
+
+        $ishtml       = false;
+        $header_title = $RCMAIL->gettext(preg_replace('/(^mail-|-)/', '', $hkey));
+
+        if ($hkey == 'date') {
+            if ($PRINT_MODE)
+                $header_value = $RCMAIL->format_date($value, $RCMAIL->config->get('date_long', 'x'));
+            else
+                $header_value = $RCMAIL->format_date($value);
+        }
+        else if ($hkey == 'priority') {
+            if ($value) {
+                $header_value = html::span('prio' . $value, rcube::Q(rcmail_localized_priority($value)));
+                $ishtml       = true;
+            }
+            else {
+                continue;
+            }
+        }
+        else if ($hkey == 'replyto') {
+            if ($headers['replyto'] != $headers['from']) {
+                $header_value = rcmail_address_string($value, $attrib['max'], true,
+                    $attrib['addicon'], $headers['charset'], $header_title);
+                $ishtml = true;
+            }
+            else {
+                continue;
+            }
+        }
+        else if ($hkey == 'mail-reply-to') {
+            if ($headers['mail-replyto'] != $headers['replyto']
+                && $headers['replyto'] != $headers['from']
+            ) {
+                $header_value = rcmail_address_string($value, $attrib['max'], true,
+                    $attrib['addicon'], $headers['charset'], $header_title);
+                $ishtml = true;
+            }
+            else {
+                continue;
+            }
+        }
+        else if ($hkey == 'sender') {
+            if ($headers['sender'] != $headers['from']) {
+                $header_value = rcmail_address_string($value, $attrib['max'], true,
+                    $attrib['addicon'], $headers['charset'], $header_title);
+                $ishtml = true;
+            }
+            else {
+                continue;
+            }
+        }
+        else if ($hkey == 'mail-followup-to') {
+            $header_value = rcmail_address_string($value, $attrib['max'], true,
+                $attrib['addicon'], $headers['charset'], $header_title);
+            $ishtml = true;
+        }
+        else if (in_array($hkey, array('from', 'to', 'cc', 'bcc'))) {
+            $header_value = rcmail_address_string($value, $attrib['max'], true,
+                $attrib['addicon'], $headers['charset'], $header_title);
+            $ishtml = true;
+        }
+        else if ($hkey == 'subject' && empty($value)) {
+            $header_value = $RCMAIL->gettext('nosubject');
+        }
+        else {
+            $value        = is_array($value) ? implode(' ', $value) : $value;
+            $header_value = trim(rcube_mime::decode_header($value, $headers['charset']));
+        }
+
+        $output_headers[$hkey] = array(
+            'title' => $header_title,
+            'value' => $header_value,
+            'raw'   => $value,
+            'html'  => $ishtml,
+        );
+    }
+
+    $plugin = $RCMAIL->plugins->exec_hook('message_headers_output', array(
+        'output'  => $output_headers,
+        'headers' => $headers_obj,
+        'exclude' => $exclude_headers, // readonly
+        'folder'  => $MESSAGE->folder, // readonly
+        'uid'     => $MESSAGE->uid,    // readonly
+    ));
+
+    // single header value is requested
+    if (!empty($attrib['valueof'])) {
+        $row = $plugin['output'][$attrib['valueof']];
+        return $row['html'] ? $row['value'] : rcube::Q($row['value']);
+    }
+
+    // compose html table
+    $table = new html_table(array('cols' => 2));
+
+    foreach ($plugin['output'] as $hkey => $row) {
+        $val = $row['html'] ? $row['value'] : rcube::Q($row['value']);
+
+        $table->add(array('class' => 'header-title'), rcube::Q($row['title']));
+        $table->add(array('class' => 'header '.$hkey), $val);
+    }
+
+    return $table->show($attrib);
+}
+
+/**
+ * Convert Priority header value into a localized string
+ */
+function rcmail_localized_priority($value)
+{
+    global $RCMAIL;
+
+    $labels_map = array(
+        '1' => 'highest',
+        '2' => 'high',
+        '3' => 'normal',
+        '4' => 'low',
+        '5' => 'lowest',
+    );
+
+    if ($value && $labels_map[$value]) {
+        return $RCMAIL->gettext($labels_map[$value]);
+    }
+
+    return '';
+}
+
+/**
+ * return block to show full message headers
+ */
+function rcmail_message_full_headers($attrib)
+{
+    global $OUTPUT, $RCMAIL;
+
+    $html = html::div(array('id' => "all-headers", 'class' => "all", 'style' => 'display:none'), html::div(array('id' => 'headers-source'), ''));
+    $html .= html::div(array(
+            'class'   => "more-headers show-headers",
+            'onclick' => "return ".rcmail_output::JS_OBJECT_NAME.".command('show-headers','',this)",
+            'title'   => $RCMAIL->gettext('togglefullheaders')
+        ), '');
+
+    $OUTPUT->add_gui_object('all_headers_row', 'all-headers');
+    $OUTPUT->add_gui_object('all_headers_box', 'headers-source');
+
+    return html::div($attrib, $html);
+}
+
+/**
+ * Handler for the 'messagebody' GUI object
+ *
+ * @param array Named parameters
+ * @return string HTML content showing the message body
+ */
+function rcmail_message_body($attrib)
+{
+    global $OUTPUT, $MESSAGE, $RCMAIL, $REMOTE_OBJECTS;
+
+    if (!is_array($MESSAGE->parts) && empty($MESSAGE->body)) {
+        return '';
+    }
+
+    if (!$attrib['id'])
+        $attrib['id'] = 'rcmailMsgBody';
+
+    $safe_mode = $MESSAGE->is_safe || intval($_GET['_safe']);
+    $out       = '';
+    $part_no   = 0;
+
+    $header_attrib = array();
+    foreach ($attrib as $attr => $value) {
+        if (preg_match('/^headertable([a-z]+)$/i', $attr, $regs)) {
+            $header_attrib[$regs[1]] = $value;
+        }
+    }
+
+    if (!empty($MESSAGE->parts)) {
+        foreach ($MESSAGE->parts as $part) {
+            if ($part->type == 'headers') {
+                $out .= html::div('message-partheaders', rcmail_message_headers(count($header_attrib) ? $header_attrib : null, $part->headers));
+            }
+            else if ($part->type == 'content') {
+                // unsupported (e.g. encrypted)
+                if ($part->realtype) {
+                    if ($part->realtype == 'multipart/encrypted' || $part->realtype == 'application/pkcs7-mime') {
+                        if (!empty($_SESSION['browser_caps']['pgpmime']) && ($pgp_mime_part = $MESSAGE->get_multipart_encrypted_part())) {
+                            $out .= html::span('part-notice', $RCMAIL->gettext('externalmessagedecryption'));
+                            $OUTPUT->set_env('pgp_mime_part', $pgp_mime_part->mime_id);
+                            $OUTPUT->set_env('pgp_mime_container', '#' . $attrib['id']);
+                            $OUTPUT->add_label('loadingdata');
+                        }
+
+                        if (!$MESSAGE->encrypted_part) {
+                            $out .= html::span('part-notice', $RCMAIL->gettext('encryptedmessage'));
+                        }
+                    }
+                    continue;
+                }
+                else if (!$part->size) {
+                    continue;
+                }
+
+                // Check if we have enough memory to handle the message in it
+                // #1487424: we need up to 10x more memory than the body
+                else if (!rcube_utils::mem_check($part->size * 10)) {
+                    $out .= html::span('part-notice', $RCMAIL->gettext('messagetoobig'). ' '
+                        . html::a('?_task=mail&_action=get&_download=1&_uid='.$MESSAGE->uid.'&_part='.$part->mime_id
+                            .'&_mbox='. urlencode($MESSAGE->folder), $RCMAIL->gettext('download')));
+                    continue;
+                }
+
+                // fetch part body
+                $body = $MESSAGE->get_part_body($part->mime_id, true);
+
+                // message is cached but not exists (#1485443), or other error
+                if ($body === false) {
+                    rcmail_message_error($MESSAGE->uid);
+                }
+
+                $plugin = $RCMAIL->plugins->exec_hook('message_body_prefix',
+                    array('part' => $part, 'prefix' => ''));
+
+                // Set attributes of the part container
+                $container_class  = $part->ctype_secondary == 'html' ? 'message-htmlpart' : 'message-part';
+                $container_id     = $container_class . (++$part_no);
+                $container_attrib = array('class' => $container_class, 'id' => $container_id);
+
+                // Assign container ID to a global variable for use in rcmail_washtml_link_callback()
+                $GLOBALS['rcmail_html_container_id'] = $container_id;
+
+                // Parse the part content for display
+                $body = rcmail_print_body($body, $part, array('safe' => $safe_mode, 'plain' => !$RCMAIL->config->get('prefer_html')));
+
+                // check if the message body is PGP encrypted
+                if (strpos($body, '-----BEGIN PGP MESSAGE-----') !== false) {
+                    $OUTPUT->set_env('is_pgp_content', '#' . $container_id);
+                }
+
+                if ($part->ctype_secondary == 'html') {
+                    $body = rcmail_html4inline($body, $container_id, 'rcmBody', $container_attrib, $safe_mode);
+                }
+
+                $out .= html::div($container_attrib, $plugin['prefix'] . $body);
+            }
+        }
+    }
+    else {
+        // Check if we have enough memory to handle the message in it
+        // #1487424: we need up to 10x more memory than the body
+        if (!rcube_utils::mem_check(strlen($MESSAGE->body) * 10)) {
+            $out .= html::span('part-notice', $RCMAIL->gettext('messagetoobig'). ' '
+                . html::a('?_task=mail&_action=get&_download=1&_uid='.$MESSAGE->uid.'&_part=0'
+                    .'&_mbox='. urlencode($MESSAGE->folder), $RCMAIL->gettext('download')));
+        }
+        else {
+            $plugin = $RCMAIL->plugins->exec_hook('message_body_prefix',
+                array('part' => $MESSAGE, 'prefix' => ''));
+
+            $out .= html::div('message-part',
+                $plugin['prefix'] . rcmail_plain_body($MESSAGE->body));
+        }
+    }
+
+    // list images after mail body
+    if ($RCMAIL->config->get('inline_images', true) && !empty($MESSAGE->attachments)) {
+        $thumbnail_size   = $RCMAIL->config->get('image_thumbnail_size', 240);
+        $client_mimetypes = (array)$RCMAIL->config->get('client_mimetypes');
+
+        foreach ($MESSAGE->attachments as $attach_prop) {
+            // skip inline images
+            if ($attach_prop->content_id && $attach_prop->disposition == 'inline') {
+                continue;
+            }
+
+            // Content-Type: image/*...
+            if ($mimetype = rcmail_part_image_type($attach_prop)) {
+                // display thumbnails
+                if ($thumbnail_size) {
+                    $supported = in_array($mimetype, $client_mimetypes);
+                    $show_link = array(
+                        'href'    => $MESSAGE->get_part_url($attach_prop->mime_id, false),
+                        'onclick' => sprintf(
+                            'return %s.command(\'load-attachment\',\'%s\',this)',
+                            rcmail_output::JS_OBJECT_NAME,
+                            $attach_prop->mime_id)
+                    );
+
+                    $out .= html::p(array('class' => 'image-attachment', 'style' => $supported ? '' : 'display:none'),
+                        html::a($show_link + array('class' => 'image-link', 'style' => sprintf('width:%dpx', $thumbnail_size)),
+                            html::img(array(
+                                'class' => 'image-thumbnail',
+                                'src'   => $MESSAGE->get_part_url($attach_prop->mime_id, 'image') . '&_thumb=1',
+                                'title' => $attach_prop->filename,
+                                'alt'   => $attach_prop->filename,
+                                'style' => sprintf('max-width:%dpx; max-height:%dpx', $thumbnail_size, $thumbnail_size),
+                                'onload' => $supported ? '' : '$(this).parents(\'p.image-attachment\').show()',
+                            ))
+                        ) .
+                        html::span('image-filename', rcube::Q($attach_prop->filename)) .
+                        html::span('image-filesize', rcube::Q($RCMAIL->message_part_size($attach_prop))) .
+                        html::span('attachment-links',
+                            ($supported ? html::a($show_link, $RCMAIL->gettext('showattachment')) . '&nbsp;' : '') .
+                                html::a($show_link['href'] . '&_download=1', $RCMAIL->gettext('download'))
+                        ) .
+                        html::br(array('style' => 'clear:both'))
+                    );
+                }
+                else {
+                    $out .= html::tag('fieldset', 'image-attachment',
+                        html::tag('legend', 'image-filename', rcube::Q($attach_prop->filename)) .
+                        html::p(array('align' => 'center'),
+                            html::img(array(
+                                'src'   => $MESSAGE->get_part_url($attach_prop->mime_id, 'image'),
+                                'title' => $attach_prop->filename,
+                                'alt'   => $attach_prop->filename,
+                        )))
+                    );
+                }
+            }
+        }
+    }
+
+    // tell client that there are blocked remote objects
+    if ($REMOTE_OBJECTS && !$safe_mode) {
+        $OUTPUT->set_env('blockedobjects', true);
+    }
+
+    return html::div($attrib, $out);
+}
+
+function rcmail_part_image_type($part)
+{
+    $mimetype = strtolower($part->mimetype);
+
+    // Skip TIFF/WEBP images if browser doesn't support this format
+    // ...until we can convert them to JPEG
+    $tiff_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['tiff']);
+    $tiff_support = $tiff_support || rcube_image::is_convertable('image/tiff');
+    $webp_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['webp']);
+    $webp_support = $webp_support || rcube_image::is_convertable('image/webp');
+
+    if ((!$tiff_support && $mimetype == 'image/tiff') || (!$webp_support && $mimetype == 'image/webp')) {
+        return;
+    }
+
+    // Content-Type: image/*...
+    if (strpos($mimetype, 'image/') === 0) {
+        return rcmail_fix_mimetype($mimetype);
+    }
+
+    // Many clients use application/octet-stream, we'll detect mimetype
+    // by checking filename extension
+
+    // Supported image filename extensions to image type map
+    $types = array(
+        'jpg'  => 'image/jpeg',
+        'jpeg' => 'image/jpeg',
+        'png'  => 'image/png',
+        'gif'  => 'image/gif',
+        'bmp'  => 'image/bmp',
+    );
+    if ($tiff_support) {
+        $types['tif']  = 'image/tiff';
+        $types['tiff'] = 'image/tiff';
+    }
+    if ($webp_support) {
+        $types['webp'] = 'image/webp';
+    }
+
+    if ($part->filename
+        && $mimetype == 'application/octet-stream'
+        && preg_match('/\.([^.]+)$/i', $part->filename, $m)
+        && ($extension = strtolower($m[1]))
+        && isset($types[$extension])
+    ) {
+        return $types[$extension];
+    }
+}
+
+/**
+ * Modify a HTML message that it can be displayed inside a HTML page
+ */
+function rcmail_html4inline($body, $container_id, $body_class='', &$attributes=array(), $allow_remote=false)
+{
+    $last_style_pos = 0;
+    $cont_id        = $container_id . ($body_class ? ' div.'.$body_class : '');
+
+    // find STYLE tags
+    while (($pos = stripos($body, '<style', $last_style_pos)) && ($pos2 = stripos($body, '</style>', $pos))) {
+        $pos = strpos($body, '>', $pos) + 1;
+        $len = $pos2 - $pos;
+
+        // replace all css definitions with #container [def]
+        $styles = substr($body, $pos, $len);
+        $styles = rcube_utils::mod_css_styles($styles, $cont_id, $allow_remote);
+
+        $body = substr_replace($body, $styles, $pos, $len);
+        $last_style_pos = $pos2 + strlen($styles) - $len;
+    }
+
+    $body = preg_replace(array(
+            // add comments around html and other tags
+            '/(<!DOCTYPE[^>]*>)/i',
+            '/(<\?xml[^>]*>)/i',
+            '/(<\/?html[^>]*>)/i',
+            '/(<\/?head[^>]*>)/i',
+            '/(<title[^>]*>.*<\/title>)/Ui',
+            '/(<\/?meta[^>]*>)/i',
+            // quote <? of php and xml files that are specified as text/html
+            '/<\?/',
+            '/\?>/',
+            // replace <body> with <div>
+            '/<body([^>]*)>/i',
+            '/<\/body>/i',
+        ),
+        array(
+            '<!--\\1-->',
+            '<!--\\1-->',
+            '<!--\\1-->',
+            '<!--\\1-->',
+            '<!--\\1-->',
+            '<!--\\1-->',
+            '&lt;?',
+            '?&gt;',
+            '<div class="' . $body_class . '"\\1>',
+            '</div>',
+        ),
+        $body);
+
+    // Handle body attributes that doesn't play nicely with div elements
+    $regexp = '/<div class="' . preg_quote($body_class, '/') . '"([^>]*)/';
+    if (preg_match($regexp, $body, $m)) {
+        $style = array();
+        $attrs = $m[0];
+
+        // Get bgcolor, we'll set it as background-color of the message container
+        if ($m[1] && preg_match('/bgcolor=["\']*([a-z0-9#]+)["\']*/i', $attrs, $mb)) {
+            $style['background-color'] = $mb[1];
+            $attrs = preg_replace('/bgcolor=["\']*[a-z0-9#]+["\']*/i', '', $attrs);
+        }
+
+        // Get background, we'll set it as background-image of the message container
+        if ($m[1] && preg_match('/background=["\']*([^"\'>\s]+)["\']*/', $attrs, $mb)) {
+            $style['background-image'] = 'url('.$mb[1].')';
+            $attrs = preg_replace('/background=["\']*([^"\'>\s]+)["\']*/', '', $attrs);
+        }
+
+        if (!empty($style)) {
+            $body = preg_replace($regexp, rtrim($attrs), $body, 1);
+        }
+
+        // handle body styles related to background image
+        if ($style['background-image']) {
+            // get body style
+            if (preg_match('/#'.preg_quote($cont_id, '/').'\s+\{([^}]+)}/i', $body, $m)) {
+                // get background related style
+                $regexp = '/(background-position|background-repeat)\s*:\s*([^;]+);/i';
+                if (preg_match_all($regexp, $m[1], $matches, PREG_SET_ORDER)) {
+                    foreach ($matches as $m) {
+                        $style[$m[1]] = $m[2];
+                    }
+                }
+            }
+        }
+
+        if (!empty($style)) {
+            foreach ($style as $idx => $val) {
+                $style[$idx] = $idx . ': ' . $val;
+            }
+
+            $attributes['style'] = implode('; ', $style);
+        }
+    }
+    // make sure there's 'rcmBody' div, we need it for proper css modification
+    // its name is hardcoded in rcmail_message_body() also
+    else {
+        $body = '<div class="' . $body_class . '">' . $body . '</div>';
+    }
+
+    return $body;
+}
+
+/**
+ * Parse link (a, link, area) attributes and set correct target
+ */
+function rcmail_washtml_link_callback($tag, $attribs, $content, $washtml)
+{
+    global $RCMAIL;
+
+    $attrib = html::parse_attrib_string($attribs);
+
+    // Remove non-printable characters in URL (#1487805)
+    if ($attrib['href']) {
+        $attrib['href'] = preg_replace('/[\x00-\x1F]/', '', $attrib['href']);
+    }
+
+    if ($tag == 'link' && preg_match('/^https?:\/\//i', $attrib['href'])) {
+        $tempurl = 'tmp-' . md5($attrib['href']) . '.css';
+        $_SESSION['modcssurls'][$tempurl] = $attrib['href'];
+        $attrib['href'] = $RCMAIL->url(array('task' => 'utils', 'action' => 'modcss', 'u' => $tempurl, 'c' => $GLOBALS['rcmail_html_container_id']));
+        $end = ' />';
+    }
+    else if (preg_match('/^mailto:(.+)/i', $attrib['href'], $mailto)) {
+        list($mailto, $url) = explode('?', html_entity_decode($mailto[1], ENT_QUOTES, 'UTF-8'), 2);
+
+        // #6020: use raw encoding for correct "+" character handling as specified in RFC6068
+        $url       = rawurldecode($url);
+        $mailto    = rawurldecode($mailto);
+        $addresses = rcube_mime::decode_address_list($mailto, null, true);
+        $mailto    = array();
+
+        // do sanity checks on recipients
+        foreach ($addresses as $idx => $addr) {
+            if (rcube_utils::check_email($addr['mailto'], false)) {
+                $addresses[$idx] = $addr['mailto'];
+                $mailto[]        = $addr['string'];
+            }
+            else {
+                unset($addresses[$idx]);
+            }
+        }
+
+        if (!empty($addresses)) {
+            $attrib['href']    = 'mailto:' . implode(',', $addresses);
+            $attrib['onclick'] = sprintf(
+                "return %s.command('compose','%s',this)",
+                rcmail_output::JS_OBJECT_NAME,
+                rcube::JQ(implode(',', $mailto) . ($url ? "?$url" : '')));
+        }
+        else {
+            $attrib['href']    = '#NOP';
+            $attrib['onclick'] = '';
+        }
+    }
+    else if (empty($attrib['href']) && !isset($attrib['name'])) {
+        $attrib['href']    = './#NOP';
+        $attrib['onclick'] = 'return false';
+    }
+    else if (!empty($attrib['href']) && $attrib['href'][0] != '#') {
+        $attrib['target'] = '_blank';
+    }
+
+    // Better security by adding rel="noreferrer" (#1484686)
+    if (($tag == 'a' || $tag == 'area') && $attrib['href'] && $attrib['href'][0] != '#') {
+        $attrib['rel'] = 'noreferrer';
+    }
+
+    // allowed attributes for a|link|area tags
+    $allow = array('href','name','target','onclick','id','class','style','title',
+        'rel','type','media','alt','coords','nohref','hreflang','shape');
+
+    return html::tag($tag, $attrib, $content, $allow);
+}
+
+/**
+ * Decode address string and re-format it as HTML links
+ */
+function rcmail_address_string($input, $max=null, $linked=false, $addicon=null, $default_charset=null, $title=null)
+{
+    global $RCMAIL, $PRINT_MODE;
+
+    $a_parts = rcube_mime::decode_address_list($input, null, true, $default_charset);
+
+    if (!count($a_parts)) {
+        return $input;
+    }
+
+    $c   = count($a_parts);
+    $j   = 0;
+    $out = '';
+    $allvalues  = array();
+    $show_email = $RCMAIL->config->get('message_show_email');
+
+    if ($addicon && !isset($_SESSION['writeable_abook'])) {
+        $_SESSION['writeable_abook'] = $RCMAIL->get_address_sources(true) ? true : false;
+    }
+
+    foreach ($a_parts as $part) {
+        $j++;
+
+        $name   = $part['name'];
+        $mailto = $part['mailto'];
+        $string = $part['string'];
+        $valid  = rcube_utils::check_email($mailto, false);
+
+        // phishing email prevention (#1488981), e.g. "valid@email.addr <phishing@email.addr>"
+        if (!$show_email && $valid && $name && $name != $mailto && strpos($name, '@')) {
+            $name = '';
+        }
+
+        // IDNA ASCII to Unicode
+        if ($name == $mailto)
+            $name = rcube_utils::idn_to_utf8($name);
+        if ($string == $mailto)
+            $string = rcube_utils::idn_to_utf8($string);
+        $mailto = rcube_utils::idn_to_utf8($mailto);
+
+        if ($PRINT_MODE) {
+            $address = sprintf('%s &lt;%s&gt;', rcube::Q($name), rcube::Q($mailto));
+        }
+        else if ($valid) {
+            if ($linked) {
+                $attrs = array(
+                    'href'    => 'mailto:' . $mailto,
+                    'class'   => 'rcmContactAddress',
+                    'onclick' => sprintf("return %s.command('compose','%s',this)",
+                        rcmail_output::JS_OBJECT_NAME, rcube::JQ(format_email_recipient($mailto, $name))),
+                );
+
+                if ($show_email && $name && $mailto) {
+                    $content = rcube::Q($name ? sprintf('%s <%s>', $name, $mailto) : $mailto);
+                }
+                else {
+                    $content = rcube::Q($name ?: $mailto);
+                    $attrs['title'] = $mailto;
+                }
+
+                $address = html::a($attrs, $content);
+            }
+            else {
+                $address = html::span(array('title' => $mailto, 'class' => "rcmContactAddress"),
+                    rcube::Q($name ?: $mailto));
+            }
+
+            if ($addicon && $_SESSION['writeable_abook']) {
+                $address .= html::a(array(
+                        'href'    => "#add",
+                        'title'   => $RCMAIL->gettext('addtoaddressbook'),
+                        'class'   => 'rcmaddcontact',
+                        'onclick' => sprintf("return %s.command('add-contact','%s',this)",
+                            rcmail_output::JS_OBJECT_NAME, rcube::JQ($string)),
+                    ),
+                    html::img(array(
+                        'src'   => $RCMAIL->output->abs_url($addicon, true),
+                        'alt'   => "Add contact",
+                        'class' => 'noselect',
+                )));
+            }
+        }
+        else {
+            $address = $name ? rcube::Q($name) : '';
+            if ($mailto) {
+                $address = trim($address . ' ' . rcube::Q($name ? sprintf('<%s>', $mailto) : $mailto));
+            }
+        }
+
+        $address = html::span('adr', $address);
+        $allvalues[] = $address;
+
+        if (!$moreadrs) {
+            $out .= ($out ? ', ' : '') . $address;
+        }
+
+        if ($max && $j == $max && $c > $j) {
+            if ($linked) {
+                $moreadrs = $c - $j;
+            }
+            else {
+                $out .= '...';
+                break;
+            }
+        }
+    }
+
+    if ($moreadrs) {
+        $label = rcube::Q($RCMAIL->gettext(array('name' => 'andnmore', 'vars' => array('nr' => $moreadrs))));
+
+        if ($PRINT_MODE) {
+            $out .= ' ' . html::a(array(
+                    'href'    => '#more',
+                    'class'   => 'morelink',
+                    'onclick' => '$(this).hide().next().show()',
+                ), $label)
+                . html::span(array('style' => 'display:none'), join(', ', $allvalues));
+        }
+        else {
+            $out .= ' ' . html::a(array(
+                    'href'    => '#more',
+                    'class'   => 'morelink',
+                    'onclick' => sprintf("return %s.show_popup_dialog('%s','%s')",
+                        rcmail_output::JS_OBJECT_NAME,
+                        rcube::JQ(join(', ', $allvalues)),
+                        rcube::JQ($title))
+                ), $label);
+        }
+    }
+
+    return $out;
+}
+
+/**
+ * Wrap text to a given number of characters per line
+ * but respect the mail quotation of replies messages (>).
+ * Finally add another quotation level by prepending the lines
+ * with >
+ *
+ * @param string Text to wrap
+ * @param int    The line width
+ * @return string The wrapped text
+ */
+function rcmail_wrap_and_quote($text, $length = 72)
+{
+    // Rebuild the message body with a maximum of $max chars, while keeping quoted message.
+    $max   = max(75, $length + 8);
+    $lines = preg_split('/\r?\n/', trim($text));
+    $out   = '';
+
+    foreach ($lines as $line) {
+        // don't wrap already quoted lines
+        if ($line[0] == '>') {
+            $line = '>' . rtrim($line);
+        }
+        else if (mb_strlen($line) > $max) {
+            $newline = '';
+
+            foreach (explode("\n", rcube_mime::wordwrap($line, $length - 2)) as $l) {
+                $newline .= strlen($l) ? "> $l\n" : ">\n";
+            }
+
+            $line = rtrim($newline);
+        }
+        else {
+            $line = '> ' . $line;
+        }
+
+        // Append the line
+        $out .= $line . "\n";
+    }
+
+    return rtrim($out, "\n");
+}
+
+function rcmail_draftinfo_encode($p)
+{
+    $parts = array();
+    foreach ($p as $key => $val) {
+        $encode  = $key == 'folder' || strpos($val, ';') !== false;
+        $parts[] = $key . '=' . ($encode ? 'B::' . base64_encode($val) : $val);
+    }
+
+    return join('; ', $parts);
+}
+
+function rcmail_draftinfo_decode($str)
+{
+    $info = array();
+
+    foreach (preg_split('/;\s+/', $str) as $part) {
+        list($key, $val) = explode('=', $part, 2);
+        if (strpos($val, 'B::') === 0) {
+            $val = base64_decode(substr($val, 3));
+        }
+        else if ($key == 'folder') {
+            $val = base64_decode($val);
+        }
+
+        $info[$key] = $val;
+    }
+
+    return $info;
+}
+
+/**
+ * Send the MDN response
+ *
+ * @param mixed $message    Original message object (rcube_message) or UID
+ * @param array $smtp_error SMTP error array (reference)
+ *
+ * @return boolean Send status
+ */
+function rcmail_send_mdn($message, &$smtp_error)
+{
+    global $RCMAIL;
+
+    if (!is_object($message) || !is_a($message, 'rcube_message')) {
+        $message = new rcube_message($message);
+    }
+
+    if ($message->headers->mdn_to && empty($message->headers->flags['MDNSENT']) &&
+        ($RCMAIL->storage->check_permflag('MDNSENT') || $RCMAIL->storage->check_permflag('*'))
+    ) {
+        $identity  = rcmail_identity_select($message);
+        $sender    = format_email_recipient($identity['email'], $identity['name']);
+        $recipient = array_shift(rcube_mime::decode_address_list(
+            $message->headers->mdn_to, 1, true, $message->headers->charset));
+        $mailto    = $recipient['mailto'];
+
+        $compose = new Mail_mime("\r\n");
+
+        $compose->setParam('text_encoding', 'quoted-printable');
+        $compose->setParam('html_encoding', 'quoted-printable');
+        $compose->setParam('head_encoding', 'quoted-printable');
+        $compose->setParam('head_charset', RCUBE_CHARSET);
+        $compose->setParam('html_charset', RCUBE_CHARSET);
+        $compose->setParam('text_charset', RCUBE_CHARSET);
+
+        // compose headers array
+        $headers = array(
+            'Date'       => $RCMAIL->user_date(),
+            'From'       => $sender,
+            'To'         => $message->headers->mdn_to,
+            'Subject'    => $RCMAIL->gettext('receiptread') . ': ' . $message->subject,
+            'Message-ID' => $RCMAIL->gen_message_id($identity['email']),
+            'X-Sender'   => $identity['email'],
+            'References' => trim($message->headers->references . ' ' . $message->headers->messageID),
+            'In-Reply-To' => $message->headers->messageID,
+        );
+
+        $report = "Final-Recipient: rfc822; {$identity['email']}\r\n"
+            . "Original-Message-ID: {$message->headers->messageID}\r\n"
+            . "Disposition: manual-action/MDN-sent-manually; displayed\r\n";
+
+        if ($message->headers->to) {
+            $report .= "Original-Recipient: {$message->headers->to}\r\n";
+        }
+
+        if ($agent = $RCMAIL->config->get('useragent')) {
+            $headers['User-Agent'] = $agent;
+            $report .= "Reporting-UA: $agent\r\n";
+        }
+
+        $to   = rcube_mime::decode_mime_string($message->headers->to, $message->headers->charset);
+        $date = $RCMAIL->format_date($message->headers->date, $RCMAIL->config->get('date_long'));
+        $body = $RCMAIL->gettext("yourmessage") . "\r\n\r\n" .
+            "\t" . $RCMAIL->gettext("to") . ": {$to}\r\n" .
+            "\t" . $RCMAIL->gettext("subject") . ": {$message->subject}\r\n" .
+            "\t" . $RCMAIL->gettext("date") . ": {$date}\r\n" .
+            "\r\n" . $RCMAIL->gettext("receiptnote");
+
+        $compose->headers(array_filter($headers));
+        $compose->setContentType('multipart/report', array('report-type'=> 'disposition-notification'));
+        $compose->setTXTBody(rcube_mime::wordwrap($body, 75, "\r\n"));
+        $compose->addAttachment($report, 'message/disposition-notification', 'MDNPart2.txt', false, '7bit', 'inline');
+
+        // SMTP options
+        $options = array('mdn_use_from' => (bool) $RCMAIL->config->get('mdn_use_from'));
+
+        $sent = $RCMAIL->deliver_message($compose, $identity['email'], $mailto, $smtp_error, $body_file, $options, true);
+
+        if ($sent) {
+            $RCMAIL->storage->set_flag($message->uid, 'MDNSENT');
+            return true;
+        }
+    }
+
+    return false;
+}
+
+/**
+ * Detect recipient identity from specified message
+ */
+function rcmail_identity_select($MESSAGE, $identities = null, $compose_mode = 'reply')
+{
+    $a_recipients = array();
+    $a_names      = array();
+
+    if ($identities === null) {
+        $identities = rcmail::get_instance()->user->list_identities(null, true);
+    }
+
+    // extract all recipients of the reply-message
+    if (is_object($MESSAGE->headers) && in_array($compose_mode, array('reply', 'forward'))) {
+        $a_to = rcube_mime::decode_address_list($MESSAGE->headers->to, null, true, $MESSAGE->headers->charset);
+        foreach ($a_to as $addr) {
+            if (!empty($addr['mailto'])) {
+                $a_recipients[] = strtolower($addr['mailto']);
+                $a_names[]      = $addr['name'];
+            }
+        }
+
+        if (!empty($MESSAGE->headers->cc)) {
+            $a_cc = rcube_mime::decode_address_list($MESSAGE->headers->cc, null, true, $MESSAGE->headers->charset);
+            foreach ($a_cc as $addr) {
+                if (!empty($addr['mailto'])) {
+                    $a_recipients[] = strtolower($addr['mailto']);
+                    $a_names[]      = $addr['name'];
+                }
+            }
+        }
+    }
+
+    // decode From: address
+    $from = rcube_mime::decode_address_list($MESSAGE->headers->from, null, true, $MESSAGE->headers->charset);
+    $from = array_shift($from);
+    $from['mailto'] = strtolower($from['mailto']);
+
+    $from_idx   = null;
+    $found_idx  = array('to' => null, 'from' => null);
+    $check_from = in_array($compose_mode, array('draft', 'edit', 'reply'));
+
+    // Select identity
+    foreach ($identities as $idx => $ident) {
+        // use From: header when in edit/draft or reply-to-self
+        if ($check_from && $from['mailto'] == strtolower($ident['email_ascii'])) {
+            // remember first matching identity address
+            if ($found_idx['from'] === null) {
+                $found_idx['from'] = $idx;
+            }
+            // match identity name
+            if ($from['name'] && $ident['name'] && $from['name'] == $ident['name']) {
+                $from_idx = $idx;
+                break;
+            }
+        }
+        // use replied/forwarded message recipients
+        else if (($found = array_search(strtolower($ident['email_ascii']), $a_recipients)) !== false) {
+            // remember first matching identity address
+            if ($found_idx['to'] === null) {
+                $found_idx['to'] = $idx;
+            }
+            // match identity name
+            if ($a_names[$found] && $ident['name'] && $a_names[$found] == $ident['name']) {
+                $from_idx = $idx;
+                break;
+            }
+        }
+    }
+
+    // If matching by name+address didn't find any matches,
+    // get first found identity (address) if any
+    if ($from_idx === null) {
+        $from_idx = $found_idx['from'] !== null ? $found_idx['from'] : $found_idx['to'];
+    }
+
+    // Try Return-Path
+    if ($from_idx === null && ($return_path = $MESSAGE->headers->others['return-path'])) {
+        $return_path = array_map('strtolower', (array) $return_path);
+
+        foreach ($identities as $idx => $ident) {
+            // Return-Path header contains an email address, but on some mailing list
+            // it can be e.g. <pear-dev-return-55250-local=domain.tld@lists.php.net>
+            // where local@domain.tld is the address we're looking for (#1489241)
+            $ident1 = strtolower($ident['email_ascii']);
+            $ident2 = str_replace('@', '=', $ident1);
+            $ident1 = '<' . $ident1 . '>';
+            $ident2 = '-' . $ident2 . '@';
+
+            foreach ($return_path as $path) {
+                if ($path == $ident1 || stripos($path, $ident2)) {
+                    $from_idx = $idx;
+                    break 2;
+                }
+            }
+        }
+    }
+
+    // See identity_select plugin for example usage of this hook
+    $plugin = rcmail::get_instance()->plugins->exec_hook('identity_select',
+        array('message' => $MESSAGE, 'identities' => $identities, 'selected' => $from_idx));
+
+    $selected = $plugin['selected'];
+
+    // default identity is always first on the list
+    return $identities[$selected !== null ? $selected : 0];
+}
+
+// Fixes some content-type names
+function rcmail_fix_mimetype($name)
+{
+    $map = array(
+        'image/x-ms-bmp' => 'image/bmp', // #1490282
+    );
+
+    $name = strtolower($name);
+
+    if ($alias = $map[$name]) {
+        $name = $alias;
+    }
+    // Some versions of Outlook create garbage Content-Type:
+    // application/pdf.A520491B_3BF7_494D_8855_7FAC2C6C0608
+    else if (preg_match('/^application\/pdf.+/', $name)) {
+        $name = 'application/pdf';
+    }
+    // treat image/pjpeg (image/pjpg, image/jpg) as image/jpeg (#1489097)
+    else if (preg_match('/^image\/p?jpe?g$/', $name)) {
+        $name = 'image/jpeg';
+    }
+
+    return $name;
+}
+
+// return attachment filename, handle empty filename case
+function rcmail_attachment_name($attachment, $display = false)
+{
+    global $RCMAIL;
+
+    $filename = (string) $attachment->filename;
+    $filename = preg_replace('/[\x00-\x1F\x7F]/', '', $filename);
+
+    if ($filename === '') {
+        if ($attachment->mimetype == 'text/html') {
+            $filename = $RCMAIL->gettext('htmlmessage');
+        }
+        else {
+            $ext      = (array) rcube_mime::get_mime_extensions($attachment->mimetype);
+            $ext      = array_shift($ext);
+            $filename = $RCMAIL->gettext('messagepart') . ' ' . $attachment->mime_id;
+            if ($ext) {
+                $filename .= '.' . $ext;
+            }
+        }
+    }
+
+    // Display smart names for some known mimetypes
+    if ($display) {
+        if (preg_match('/application\/(pgp|pkcs7)-signature/i', $attachment->mimetype)) {
+            $filename = $RCMAIL->gettext('digitalsig');
+        }
+    }
+
+    return $filename;
+}
+
+function rcmail_search_filter($attrib)
+{
+    global $RCMAIL;
+
+    if (!strlen($attrib['id'])) {
+        $attrib['id'] = 'rcmlistfilter';
+    }
+
+    $attrib['onchange'] = rcmail_output::JS_OBJECT_NAME.'.filter_mailbox(this.value)';
+
+    // Content-Type values of messages with attachments
+    // the same as in app.js:add_message_row()
+    $ctypes = array('application/', 'multipart/m', 'multipart/signed', 'multipart/report');
+
+    // Build search string of "with attachment" filter
+    $attachment = trim(str_repeat(' OR', count($ctypes)-1));
+    foreach ($ctypes as $type) {
+        $attachment .= ' HEADER Content-Type ' . rcube_imap_generic::escape($type);
+    }
+
+    $select = new html_select($attrib);
+    $select->add($RCMAIL->gettext('all'), 'ALL');
+    $select->add($RCMAIL->gettext('unread'), 'UNSEEN');
+    $select->add($RCMAIL->gettext('flagged'), 'FLAGGED');
+    $select->add($RCMAIL->gettext('unanswered'), 'UNANSWERED');
+    if (!$RCMAIL->config->get('skip_deleted')) {
+        $select->add($RCMAIL->gettext('deleted'), 'DELETED');
+        $select->add($RCMAIL->gettext('undeleted'), 'UNDELETED');
+    }
+    $select->add($RCMAIL->gettext('withattachment'), $attachment);
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('highest'), 'HEADER X-PRIORITY 1');
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('high'), 'HEADER X-PRIORITY 2');
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('normal'), 'NOT HEADER X-PRIORITY 1 NOT HEADER X-PRIORITY 2 NOT HEADER X-PRIORITY 4 NOT HEADER X-PRIORITY 5');
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('low'), 'HEADER X-PRIORITY 4');
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('lowest'), 'HEADER X-PRIORITY 5');
+
+    $RCMAIL->output->add_gui_object('search_filter', $attrib['id']);
+
+    return $select->show($_REQUEST['_search'] ? $_SESSION['search_filter'] : 'ALL');
+}
+
+function rcmail_search_interval($attrib)
+{
+    global $RCMAIL;
+
+    if (!strlen($attrib['id'])) {
+        $attrib['id'] = 'rcmsearchinterval';
+    }
+
+    $select = new html_select($attrib);
+    $select->add('', '');
+
+    foreach (array('1W', '1M', '1Y', '-1W', '-1M', '-1Y') as $value) {
+        $select->add($RCMAIL->gettext('searchinterval' . $value), $value);
+    }
+
+    $RCMAIL->output->add_gui_object('search_interval', $attrib['id']);
+
+    return $select->show($_REQUEST['_search'] ? $_SESSION['search_interval'] : '');
+}
+
+function rcmail_message_error()
+{
+    global $RCMAIL;
+
+    // Set env variables for messageerror.html template
+    if ($RCMAIL->action == 'show') {
+        $mbox_name = $RCMAIL->storage->get_folder();
+
+        $RCMAIL->output->set_env('mailbox', $mbox_name);
+        $RCMAIL->output->set_env('uid', null);
+    }
+
+    // display error message
+    $RCMAIL->output->show_message('messageopenerror', 'error');
+    // ... display message error page
+    $RCMAIL->output->send('messageerror');
+}
+
+function rcmail_message_import_form($attrib = array())
+{
+    global $RCMAIL;
+
+    $RCMAIL->output->add_label('selectimportfile','importwait');
+
+    $input_attr = array(
+        'multiple' => true,
+        'name'     => '_file[]',
+        'accept'   => ".eml, .mbox, message/rfc822, text/*",
+    );
+
+    $attrib['prefix'] = html::tag('input', array('type' => 'hidden', 'name' => '_unlock', 'value' => ''))
+        . html::tag('input', array('type' => 'hidden', 'name' => '_framed', 'value' => '1'));
+
+    return $RCMAIL->upload_form($attrib, 'importform', 'import-messages', $input_attr);
+}
+
+/**
+ * Add groups from the given address source to the address book widget
+ */
+function rcmail_compose_contact_groups($abook, $source_id, $search = null, $search_mode = 0)
+{
+    global $RCMAIL, $OUTPUT;
+
+    $jsresult = array();
+    foreach ($abook->list_groups($search, $search_mode) as $group) {
+        $abook->reset();
+        $abook->set_group($group['ID']);
+
+        // group (distribution list) with email address(es)
+        if ($group['email']) {
+            foreach ((array)$group['email'] as $email) {
+                $row_id = 'G'.$group['ID'];
+                $jsresult[$row_id] = format_email_recipient($email, $group['name']);
+                $OUTPUT->command('add_contact_row', $row_id, array(
+                    'contactgroup' => html::span(array('title' => $email), rcube::Q($group['name']))), 'group');
+            }
+        }
+        // make virtual groups clickable to list their members
+        else if ($group['virtual']) {
+            $row_id = 'G'.$group['ID'];
+            $OUTPUT->command('add_contact_row', $row_id, array(
+                'contactgroup' => html::a(array(
+                    'href' => '#list',
+                    'rel' => $group['ID'],
+                    'title' => $RCMAIL->gettext('listgroup'),
+                    'onclick' => sprintf("return %s.command('pushgroup',{'source':'%s','id':'%s'},this,event)",
+                                    rcmail_output::JS_OBJECT_NAME, $source_id, $group['ID']),
+                ), rcube::Q($group['name']) . '&nbsp;' . html::span('action', '&raquo;'))),
+                'group',
+                array('ID' => $group['ID'], 'name' => $group['name'], 'virtual' => true));
+        }
+        // show group with count
+        else if (($result = $abook->count()) && $result->count) {
+            $row_id = 'E'.$group['ID'];
+            $jsresult[$row_id] = $group['name'];
+            $OUTPUT->command('add_contact_row', $row_id, array(
+                'contactgroup' => rcube::Q($group['name'] . ' (' . intval($result->count) . ')')), 'group');
+        }
+    }
+
+    $abook->reset();
+    $abook->set_group(0);
+
+    return $jsresult;
+}
+
+function rcmail_save_attachment($message, $pid, $compose_id, $params = array())
+{
+    global $COMPOSE;
+
+    $rcmail  = rcmail::get_instance();
+    $storage = $rcmail->get_storage();
+
+    if ($pid) {
+        // attachment requested
+        $part     = $message->mime_parts[$pid];
+        $size     = $part->size;
+        $mimetype = $part->ctype_primary . '/' . $part->ctype_secondary;
+        $filename = $params['filename'] ?: rcmail_attachment_name($part);
+    }
+    else if (is_object($message)) {
+        // the whole message requested
+        $size     = $message->size;
+        $mimetype = 'message/rfc822';
+        $filename = $params['filename'] ?: 'message_rfc822.eml';
+    }
+    else if (is_string($message)) {
+        // the whole message requested
+        $size     = strlen($message);
+        $data     = $message;
+        $mimetype = $params['mimetype'];
+        $filename = $params['filename'];
+    }
+
+    if (!isset($data)) {
+        // don't load too big attachments into memory
+        if (!rcube_utils::mem_check($size)) {
+            $temp_dir = unslashify($rcmail->config->get('temp_dir'));
+            $path     = tempnam($temp_dir, 'rcmAttmnt');
+
+            if ($fp = fopen($path, 'w')) {
+                if ($pid) {
+                    // part body
+                    $message->get_part_body($pid, false, 0, $fp);
+                }
+                else {
+                    // complete message
+                    $storage->get_raw_body($message->uid, $fp);
+                }
+
+                fclose($fp);
+            }
+            else {
+                return false;
+            }
+        }
+        else if ($pid) {
+            // part body
+            $data = $message->get_part_body($pid);
+        }
+        else {
+            // complete message
+            $data = $storage->get_raw_body($message->uid);
+        }
+    }
+
+    $attachment = array(
+        'group'      => $compose_id,
+        'name'       => $filename,
+        'mimetype'   => $mimetype,
+        'content_id' => $part ? $part->content_id : null,
+        'data'       => $data,
+        'path'       => $path,
+        'size'       => $path ? filesize($path) : strlen($data),
+        'charset'    => $part ? $part->charset : $params['charset'],
+    );
+
+    $attachment = $rcmail->plugins->exec_hook('attachment_save', $attachment);
+
+    if ($attachment['status']) {
+        unset($attachment['data'], $attachment['status'], $attachment['content_id'], $attachment['abort']);
+
+        // rcube_session::append() replaces current session data with the old values
+        // (in rcube_session::reload()). This is a problem in 'compose' action, because before
+        // the first append() use we set some important data in the session.
+        // It also overwrites attachments list. Fixing reload() is not so simple if possible
+        // as we don't really know what has been added and what removed in meantime.
+        // So, for now we'll do not use append() on 'compose' action (#1490608).
+
+        if ($rcmail->action == 'compose') {
+            $COMPOSE['attachments'][$attachment['id']] = $attachment;
+        }
+        else {
+            $rcmail->session->append('compose_data_' . $compose_id . '.attachments', $attachment['id'], $attachment);
+        }
+
+        return $attachment;
+    }
+    else if ($path) {
+        @unlink($path);
+    }
+
+    return false;
+}
+
+// Return mimetypes supported by the browser
+function rcmail_supported_mimetypes()
+{
+    $rcmail = rcube::get_instance();
+
+    // mimetypes supported by the browser (default settings)
+    $mimetypes = (array) $rcmail->config->get('client_mimetypes');
+
+    // Remove unsupported types, which makes that attachment which cannot be
+    // displayed in a browser will be downloaded directly without displaying an overlay page
+    if (empty($_SESSION['browser_caps']['pdf']) && ($key = array_search('application/pdf', $mimetypes)) !== false) {
+        unset($mimetypes[$key]);
+    }
+
+    if (empty($_SESSION['browser_caps']['flash']) && ($key = array_search('application/x-shockwave-flash', $mimetypes)) !== false) {
+        unset($mimetypes[$key]);
+    }
+
+    foreach (array('tiff', 'webp') as $type) {
+        if (empty($_SESSION['browser_caps'][$type]) && ($key = array_search('image/' . $type, $mimetypes)) !== false) {
+            // can we convert it to jpeg?
+            if (!rcube_image::is_convertable('image/' . $type)) {
+                unset($mimetypes[$key]);
+            }
+        }
+    }
+
+    // @TODO: support mail preview for compose attachments
+    if ($rcmail->action != 'compose' && !in_array('message/rfc822', $mimetypes)) {
+        $mimetypes[] = 'message/rfc822';
+    }
+
+    return array_values($mimetypes);
+}