From 1597c8a0c2a8a35fa19ad710d0518ea30c7244c5 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Sat, 22 Mar 2014 09:55:12 -0400
Subject: [PATCH] Make sure parent folder selector always contains parent folder of current folder, even if it does not exist

---
 program/include/rcmail.php | 2066 ++++++++++++++++++++++++++++------------------------------
 1 files changed, 1,013 insertions(+), 1,053 deletions(-)

diff --git a/program/include/rcmail.php b/program/include/rcmail.php
index 249bd05..4aa3ded 100644
--- a/program/include/rcmail.php
+++ b/program/include/rcmail.php
@@ -5,8 +5,8 @@
  | program/include/rcmail.php                                            |
  |                                                                       |
  | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2008-2012, The Roundcube Dev Team                       |
- | Copyright (C) 2011-2012, Kolab Systems AG                             |
+ | Copyright (C) 2008-2014, The Roundcube Dev Team                       |
+ | Copyright (C) 2011-2014, Kolab Systems AG                             |
  |                                                                       |
  | Licensed under the GNU General Public License version 3 or            |
  | any later version with exceptions for skins & plugins.                |
@@ -21,547 +21,642 @@
  +-----------------------------------------------------------------------+
 */
 
-
 /**
  * Application class of Roundcube Webmail
  * implemented as singleton
  *
- * @package Core
+ * @package Webmail
  */
 class rcmail extends rcube
 {
-  /**
-   * Main tasks.
-   *
-   * @var array
-   */
-  static public $main_tasks = array('mail','settings','addressbook','login','logout','utils','dummy');
+    /**
+     * Main tasks.
+     *
+     * @var array
+     */
+    static public $main_tasks = array('mail','settings','addressbook','login','logout','utils','dummy');
 
-  /**
-   * Current task.
-   *
-   * @var string
-   */
-  public $task;
+    /**
+     * Current task.
+     *
+     * @var string
+     */
+    public $task;
 
-  /**
-   * Current action.
-   *
-   * @var string
-   */
-  public $action = '';
-  public $comm_path = './';
+    /**
+     * Current action.
+     *
+     * @var string
+     */
+    public $action    = '';
+    public $comm_path = './';
+    public $filename  = '';
 
-  private $address_books = array();
-  private $action_map = array();
+    private $address_books = array();
+    private $action_map    = array();
 
 
-  const ERROR_STORAGE          = -2;
-  const ERROR_INVALID_REQUEST  = 1;
-  const ERROR_INVALID_HOST     = 2;
-  const ERROR_COOKIES_DISABLED = 3;
+    const ERROR_STORAGE          = -2;
+    const ERROR_INVALID_REQUEST  = 1;
+    const ERROR_INVALID_HOST     = 2;
+    const ERROR_COOKIES_DISABLED = 3;
 
 
-  /**
-   * This implements the 'singleton' design pattern
-   *
-   * @return rcmail The one and only instance
-   */
-  static function get_instance()
-  {
-    if (!self::$instance || !is_a(self::$instance, 'rcmail')) {
-      self::$instance = new rcmail();
-      self::$instance->startup();  // init AFTER object was linked with self::$instance
-    }
-
-    return self::$instance;
-  }
-
-
-  /**
-   * Initial startup function
-   * to register session, create database and imap connections
-   */
-  protected function startup()
-  {
-    $this->init(self::INIT_WITH_DB | self::INIT_WITH_PLUGINS);
-
-    // start session
-    $this->session_init();
-
-    // create user object
-    $this->set_user(new rcube_user($_SESSION['user_id']));
-
-    // set task and action properties
-    $this->set_task(rcube_utils::get_input_value('_task', rcube_utils::INPUT_GPC));
-    $this->action = asciiwords(rcube_utils::get_input_value('_action', rcube_utils::INPUT_GPC));
-
-    // reset some session parameters when changing task
-    if ($this->task != 'utils') {
-      if ($this->session && $_SESSION['task'] != $this->task)
-        $this->session->remove('page');
-      // set current task to session
-      $_SESSION['task'] = $this->task;
-    }
-
-    // init output class
-    if (!empty($_REQUEST['_remote']))
-      $GLOBALS['OUTPUT'] = $this->json_init();
-    else
-      $GLOBALS['OUTPUT'] = $this->load_gui(!empty($_REQUEST['_framed']));
-
-    // load plugins
-    $this->plugins->init($this, $this->task);
-    $this->plugins->load_plugins((array)$this->config->get('plugins', array()), array('filesystem_attachments', 'jqueryui'));
-  }
-
-
-  /**
-   * Setter for application task
-   *
-   * @param string Task to set
-   */
-  public function set_task($task)
-  {
-    $task = asciiwords($task);
-
-    if ($this->user && $this->user->ID)
-      $task = !$task ? 'mail' : $task;
-    else
-      $task = 'login';
-
-    $this->task = $task;
-    $this->comm_path = $this->url(array('task' => $this->task));
-
-    if ($this->output)
-      $this->output->set_env('task', $this->task);
-  }
-
-
-  /**
-   * Setter for system user object
-   *
-   * @param rcube_user Current user instance
-   */
-  public function set_user($user)
-  {
-    if (is_object($user)) {
-      $this->user = $user;
-
-      // overwrite config with user preferences
-      $this->config->set_user_prefs((array)$this->user->get_prefs());
-    }
-
-    $lang = $this->language_prop($this->config->get('language', $_SESSION['language']));
-    $_SESSION['language'] = $this->user->language = $lang;
-
-    // set localization
-    setlocale(LC_ALL, $lang . '.utf8', $lang . '.UTF-8', 'en_US.utf8', 'en_US.UTF-8');
-
-    // workaround for http://bugs.php.net/bug.php?id=18556
-    if (in_array($lang, array('tr_TR', 'ku', 'az_AZ'))) {
-      setlocale(LC_CTYPE, 'en_US.utf8', 'en_US.UTF-8');
-    }
-  }
-
-
-  /**
-   * Return instance of the internal address book class
-   *
-   * @param string  Address book identifier (-1 for default addressbook)
-   * @param boolean True if the address book needs to be writeable
-   *
-   * @return rcube_contacts Address book object
-   */
-  public function get_address_book($id, $writeable = false)
-  {
-    $contacts    = null;
-    $ldap_config = (array)$this->config->get('ldap_public');
-
-    // 'sql' is the alias for '0' used by autocomplete
-    if ($id == 'sql')
-      $id = '0';
-    else if ($id == -1) {
-      $id = $this->config->get('default_addressbook');
-      $default = true;
-    }
-
-    // use existing instance
-    if (isset($this->address_books[$id]) && ($this->address_books[$id] instanceof rcube_addressbook)) {
-      $contacts = $this->address_books[$id];
-    }
-    else if ($id && $ldap_config[$id]) {
-      $contacts = new rcube_ldap($ldap_config[$id], $this->config->get('ldap_debug'), $this->config->mail_domain($_SESSION['storage_host']));
-    }
-    else if ($id === '0') {
-      $contacts = new rcube_contacts($this->db, $this->get_user_id());
-    }
-    else {
-      $plugin = $this->plugins->exec_hook('addressbook_get', array('id' => $id, 'writeable' => $writeable));
-
-      // plugin returned instance of a rcube_addressbook
-      if ($plugin['instance'] instanceof rcube_addressbook) {
-        $contacts = $plugin['instance'];
-      }
-    }
-
-    // when user requested default writeable addressbook
-    // we need to check if default is writeable, if not we
-    // will return first writeable book (if any exist)
-    if ($contacts && $default && $contacts->readonly && $writeable) {
-      $contacts = null;
-    }
-
-    // Get first addressbook from the list if configured default doesn't exist
-    // This can happen when user deleted the addressbook (e.g. Kolab folder)
-    if (!$contacts && (!$id || $default)) {
-      $source = reset($this->get_address_sources($writeable, !$default));
-      if (!empty($source)) {
-        $contacts = $this->get_address_book($source['id']);
-        if ($contacts) {
-          $id = $source['id'];
+    /**
+     * This implements the 'singleton' design pattern
+     *
+     * @param string Environment name to run (e.g. live, dev, test)
+     *
+     * @return rcmail The one and only instance
+     */
+    static function get_instance($env = '')
+    {
+        if (!self::$instance || !is_a(self::$instance, 'rcmail')) {
+            self::$instance = new rcmail($env);
+            // init AFTER object was linked with self::$instance
+            self::$instance->startup();
         }
-      }
+
+        return self::$instance;
     }
 
-    if (!$contacts) {
-      self::raise_error(array(
-        'code' => 700, 'type' => 'php',
-        'file' => __FILE__, 'line' => __LINE__,
-        'message' => "Addressbook source ($id) not found!"),
-        true, true);
-    }
+    /**
+     * Initial startup function
+     * to register session, create database and imap connections
+     */
+    protected function startup()
+    {
+        $this->init(self::INIT_WITH_DB | self::INIT_WITH_PLUGINS);
 
-    // add to the 'books' array for shutdown function
-    $this->address_books[$id] = $contacts;
-
-    if ($writeable && $contacts->readonly) {
-      return null;
-    }
-
-    // set configured sort order
-    if ($sort_col = $this->config->get('addressbook_sort_col')) {
-        $contacts->set_sort_order($sort_col);
-    }
-
-    return $contacts;
-  }
-
-
-  /**
-   * Return address books list
-   *
-   * @param boolean True if the address book needs to be writeable
-   * @param boolean True if the address book needs to be not hidden
-   *
-   * @return array  Address books array
-   */
-  public function get_address_sources($writeable = false, $skip_hidden = false)
-  {
-    $abook_type = strtolower($this->config->get('address_book_type'));
-    $ldap_config = $this->config->get('ldap_public');
-    $autocomplete = (array) $this->config->get('autocomplete_addressbooks');
-    $list = array();
-
-    // We are using the DB address book or a plugin address book
-    if ($abook_type != 'ldap' && $abook_type != '') {
-      if (!isset($this->address_books['0']))
-        $this->address_books['0'] = new rcube_contacts($this->db, $this->get_user_id());
-      $list['0'] = array(
-        'id'       => '0',
-        'name'     => $this->gettext('personaladrbook'),
-        'groups'   => $this->address_books['0']->groups,
-        'readonly' => $this->address_books['0']->readonly,
-        'autocomplete' => in_array('sql', $autocomplete),
-        'undelete' => $this->address_books['0']->undelete && $this->config->get('undo_timeout'),
-      );
-    }
-
-    if ($ldap_config) {
-      $ldap_config = (array) $ldap_config;
-      foreach ($ldap_config as $id => $prop) {
-        // handle misconfiguration
-        if (empty($prop) || !is_array($prop)) {
-          continue;
+        // set filename if not index.php
+        if (($basename = basename($_SERVER['SCRIPT_FILENAME'])) && $basename != 'index.php') {
+            $this->filename = $basename;
         }
-        $list[$id] = array(
-          'id'       => $id,
-          'name'     => html::quote($prop['name']),
-          'groups'   => is_array($prop['groups']),
-          'readonly' => !$prop['writable'],
-          'hidden'   => $prop['hidden'],
-          'autocomplete' => in_array($id, $autocomplete)
-        );
-      }
-    }
 
-    $plugin = $this->plugins->exec_hook('addressbooks_list', array('sources' => $list));
-    $list = $plugin['sources'];
+        // start session
+        $this->session_init();
 
-    foreach ($list as $idx => $item) {
-      // register source for shutdown function
-      if (!is_object($this->address_books[$item['id']])) {
-        $this->address_books[$item['id']] = $item;
-      }
-      // remove from list if not writeable as requested
-      if ($writeable && $item['readonly']) {
-          unset($list[$idx]);
-      }
-      // remove from list if hidden as requested
-      else if ($skip_hidden && $item['hidden']) {
-          unset($list[$idx]);
-      }
-    }
+        // create user object
+        $this->set_user(new rcube_user($_SESSION['user_id']));
 
-    return $list;
-  }
+        // set task and action properties
+        $this->set_task(rcube_utils::get_input_value('_task', rcube_utils::INPUT_GPC));
+        $this->action = asciiwords(rcube_utils::get_input_value('_action', rcube_utils::INPUT_GPC));
 
+        // reset some session parameters when changing task
+        if ($this->task != 'utils') {
+            // we reset list page when switching to another task
+            // but only to the main task interface - empty action (#1489076)
+            // this will prevent from unintentional page reset on cross-task requests
+            if ($this->session && $_SESSION['task'] != $this->task && empty($this->action)) {
+                $this->session->remove('page');
+            }
 
-  /**
-   * Init output object for GUI and add common scripts.
-   * This will instantiate a rcmail_output_html object and set
-   * environment vars according to the current session and configuration
-   *
-   * @param boolean True if this request is loaded in a (i)frame
-   * @return rcube_output Reference to HTML output object
-   */
-  public function load_gui($framed = false)
-  {
-    // init output page
-    if (!($this->output instanceof rcmail_output_html))
-      $this->output = new rcmail_output_html($this->task, $framed);
-
-    // set refresh interval
-    $this->output->set_env('refresh_interval', $this->config->get('refresh_interval', 0));
-    $this->output->set_env('session_lifetime', $this->config->get('session_lifetime', 0) * 60);
-
-    if ($framed) {
-      $this->comm_path .= '&_framed=1';
-      $this->output->set_env('framed', true);
-    }
-
-    $this->output->set_env('task', $this->task);
-    $this->output->set_env('action', $this->action);
-    $this->output->set_env('comm_path', $this->comm_path);
-    $this->output->set_charset(RCUBE_CHARSET);
-
-    // add some basic labels to client
-    $this->output->add_label('loading', 'servererror', 'requesttimedout', 'refreshing');
-
-    return $this->output;
-  }
-
-
-  /**
-   * Create an output object for JSON responses
-   *
-   * @return rcube_output Reference to JSON output object
-   */
-  public function json_init()
-  {
-    if (!($this->output instanceof rcmail_output_json))
-      $this->output = new rcmail_output_json($this->task);
-
-    return $this->output;
-  }
-
-
-  /**
-   * Create session object and start the session.
-   */
-  public function session_init()
-  {
-    parent::session_init();
-
-    // set initial session vars
-    if (!$_SESSION['user_id'])
-      $_SESSION['temp'] = true;
-
-    // restore skin selection after logout
-    if ($_SESSION['temp'] && !empty($_SESSION['skin']))
-      $this->config->set('skin', $_SESSION['skin']);
-  }
-
-
-  /**
-   * Perfom login to the mail server and to the webmail service.
-   * This will also create a new user entry if auto_create_user is configured.
-   *
-   * @param string Mail storage (IMAP) user name
-   * @param string Mail storage (IMAP) password
-   * @param string Mail storage (IMAP) host
-   * @param bool   Enables cookie check
-   *
-   * @return boolean True on success, False on failure
-   */
-  function login($username, $pass, $host = null, $cookiecheck = false)
-  {
-    $this->login_error = null;
-
-    if (empty($username)) {
-      return false;
-    }
-
-    if ($cookiecheck && empty($_COOKIE)) {
-      $this->login_error = self::ERROR_COOKIES_DISABLED;
-      return false;
-    }
-
-    $config = $this->config->all();
-
-    if (!$host)
-      $host = $config['default_host'];
-
-    // Validate that selected host is in the list of configured hosts
-    if (is_array($config['default_host'])) {
-      $allowed = false;
-      foreach ($config['default_host'] as $key => $host_allowed) {
-        if (!is_numeric($key))
-          $host_allowed = $key;
-        if ($host == $host_allowed) {
-          $allowed = true;
-          break;
+            // set current task to session
+            $_SESSION['task'] = $this->task;
         }
-      }
-      if (!$allowed) {
-        $host = null;
-      }
-    }
-    else if (!empty($config['default_host']) && $host != rcube_utils::parse_host($config['default_host'])) {
-      $host = null;
+
+        // init output class
+        if (!empty($_REQUEST['_remote']))
+            $GLOBALS['OUTPUT'] = $this->json_init();
+        else
+            $GLOBALS['OUTPUT'] = $this->load_gui(!empty($_REQUEST['_framed']));
+
+        // load plugins
+        $this->plugins->init($this, $this->task);
+        $this->plugins->load_plugins((array)$this->config->get('plugins', array()),
+            array('filesystem_attachments', 'jqueryui'));
     }
 
-    if (!$host) {
-      $this->login_error = self::ERROR_INVALID_HOST;
-      return false;
+    /**
+     * Setter for application task
+     *
+     * @param string Task to set
+     */
+    public function set_task($task)
+    {
+        $task = asciiwords($task, true);
+
+        if ($this->user && $this->user->ID)
+            $task = !$task ? 'mail' : $task;
+        else
+            $task = 'login';
+
+        $this->task      = $task;
+        $this->comm_path = $this->url(array('task' => $this->task));
+
+        if ($this->output) {
+            $this->output->set_env('task', $this->task);
+        }
     }
 
-    // parse $host URL
-    $a_host = parse_url($host);
-    if ($a_host['host']) {
-      $host = $a_host['host'];
-      $ssl = (isset($a_host['scheme']) && in_array($a_host['scheme'], array('ssl','imaps','tls'))) ? $a_host['scheme'] : null;
-      if (!empty($a_host['port']))
-        $port = $a_host['port'];
-      else if ($ssl && $ssl != 'tls' && (!$config['default_port'] || $config['default_port'] == 143))
-        $port = 993;
+    /**
+     * Setter for system user object
+     *
+     * @param rcube_user Current user instance
+     */
+    public function set_user($user)
+    {
+        parent::set_user($user);
+
+        $lang = $this->language_prop($this->config->get('language', $_SESSION['language']));
+        $_SESSION['language'] = $this->user->language = $lang;
+
+        // set localization
+        setlocale(LC_ALL, $lang . '.utf8', $lang . '.UTF-8', 'en_US.utf8', 'en_US.UTF-8');
+
+        // workaround for http://bugs.php.net/bug.php?id=18556
+        if (version_compare(PHP_VERSION, '5.5.0', '<') && in_array($lang, array('tr_TR', 'ku', 'az_AZ'))) {
+            setlocale(LC_CTYPE, 'en_US.utf8', 'en_US.UTF-8');
+        }
     }
 
-    if (!$port) {
-        $port = $config['default_port'];
+    /**
+     * Return instance of the internal address book class
+     *
+     * @param string  Address book identifier (-1 for default addressbook)
+     * @param boolean True if the address book needs to be writeable
+     *
+     * @return rcube_contacts Address book object
+     */
+    public function get_address_book($id, $writeable = false)
+    {
+        $contacts    = null;
+        $ldap_config = (array)$this->config->get('ldap_public');
+
+        // 'sql' is the alias for '0' used by autocomplete
+        if ($id == 'sql')
+            $id = '0';
+        else if ($id == -1) {
+            $id = $this->config->get('default_addressbook');
+            $default = true;
+        }
+
+        // use existing instance
+        if (isset($this->address_books[$id]) && ($this->address_books[$id] instanceof rcube_addressbook)) {
+            $contacts = $this->address_books[$id];
+        }
+        else if ($id && $ldap_config[$id]) {
+            $domain   = $this->config->mail_domain($_SESSION['storage_host']);
+            $contacts = new rcube_ldap($ldap_config[$id], $this->config->get('ldap_debug'), $domain);
+        }
+        else if ($id === '0') {
+            $contacts = new rcube_contacts($this->db, $this->get_user_id());
+        }
+        else {
+            $plugin = $this->plugins->exec_hook('addressbook_get', array('id' => $id, 'writeable' => $writeable));
+
+            // plugin returned instance of a rcube_addressbook
+            if ($plugin['instance'] instanceof rcube_addressbook) {
+                $contacts = $plugin['instance'];
+            }
+        }
+
+        // when user requested default writeable addressbook
+        // we need to check if default is writeable, if not we
+        // will return first writeable book (if any exist)
+        if ($contacts && $default && $contacts->readonly && $writeable) {
+            $contacts = null;
+        }
+
+        // Get first addressbook from the list if configured default doesn't exist
+        // This can happen when user deleted the addressbook (e.g. Kolab folder)
+        if (!$contacts && (!$id || $default)) {
+            $source = reset($this->get_address_sources($writeable, !$default));
+            if (!empty($source)) {
+                $contacts = $this->get_address_book($source['id']);
+                if ($contacts) {
+                    $id = $source['id'];
+                }
+            }
+        }
+
+        if (!$contacts) {
+            // there's no default, just return
+            if ($default) {
+                return null;
+            }
+
+            self::raise_error(array(
+                    'code'    => 700,
+                    'file'    => __FILE__,
+                    'line'    => __LINE__,
+                    'message' => "Addressbook source ($id) not found!"
+                ),
+                true, true);
+        }
+
+        // add to the 'books' array for shutdown function
+        $this->address_books[$id] = $contacts;
+
+        if ($writeable && $contacts->readonly) {
+            return null;
+        }
+
+        // set configured sort order
+        if ($sort_col = $this->config->get('addressbook_sort_col')) {
+            $contacts->set_sort_order($sort_col);
+        }
+
+        return $contacts;
     }
 
-    /* Modify username with domain if required
-       Inspired by Marco <P0L0_notspam_binware.org>
-    */
-    // Check if we need to add domain
-    if (!empty($config['username_domain']) && strpos($username, '@') === false) {
-      if (is_array($config['username_domain']) && isset($config['username_domain'][$host]))
-        $username .= '@'.rcube_utils::parse_host($config['username_domain'][$host], $host);
-      else if (is_string($config['username_domain']))
-        $username .= '@'.rcube_utils::parse_host($config['username_domain'], $host);
+    /**
+     * Return identifier of the address book object
+     *
+     * @param rcube_addressbook Addressbook source object
+     *
+     * @return string Source identifier
+     */
+    public function get_address_book_id($object)
+    {
+        foreach ($this->address_books as $index => $book) {
+            if ($book === $object) {
+                return $index;
+            }
+        }
     }
 
-    if (!isset($config['login_lc'])) {
-      $config['login_lc'] = 2; // default
+    /**
+     * Return address books list
+     *
+     * @param boolean True if the address book needs to be writeable
+     * @param boolean True if the address book needs to be not hidden
+     *
+     * @return array  Address books array
+     */
+    public function get_address_sources($writeable = false, $skip_hidden = false)
+    {
+        $abook_type   = (string) $this->config->get('address_book_type');
+        $ldap_config  = (array) $this->config->get('ldap_public');
+        $autocomplete = (array) $this->config->get('autocomplete_addressbooks');
+        $list         = array();
+
+        // We are using the DB address book or a plugin address book
+        if (!empty($abook_type) && strtolower($abook_type) != 'ldap') {
+            if (!isset($this->address_books['0'])) {
+                $this->address_books['0'] = new rcube_contacts($this->db, $this->get_user_id());
+            }
+
+            $list['0'] = array(
+                'id'       => '0',
+                'name'     => $this->gettext('personaladrbook'),
+                'groups'   => $this->address_books['0']->groups,
+                'readonly' => $this->address_books['0']->readonly,
+                'undelete' => $this->address_books['0']->undelete && $this->config->get('undo_timeout'),
+                'autocomplete' => in_array('sql', $autocomplete),
+            );
+        }
+
+        if (!empty($ldap_config)) {
+            foreach ($ldap_config as $id => $prop) {
+                // handle misconfiguration
+                if (empty($prop) || !is_array($prop)) {
+                    continue;
+                }
+
+                $list[$id] = array(
+                    'id'       => $id,
+                    'name'     => html::quote($prop['name']),
+                    'groups'   => !empty($prop['groups']) || !empty($prop['group_filters']),
+                    'readonly' => !$prop['writable'],
+                    'hidden'   => $prop['hidden'],
+                    'autocomplete' => in_array($id, $autocomplete)
+                );
+            }
+        }
+
+        $plugin = $this->plugins->exec_hook('addressbooks_list', array('sources' => $list));
+        $list   = $plugin['sources'];
+
+        foreach ($list as $idx => $item) {
+            // register source for shutdown function
+            if (!is_object($this->address_books[$item['id']])) {
+                $this->address_books[$item['id']] = $item;
+            }
+            // remove from list if not writeable as requested
+            if ($writeable && $item['readonly']) {
+                unset($list[$idx]);
+            }
+            // remove from list if hidden as requested
+            else if ($skip_hidden && $item['hidden']) {
+                unset($list[$idx]);
+            }
+        }
+
+        return $list;
     }
 
-    // Convert username to lowercase. If storage backend
-    // is case-insensitive we need to store always the same username (#1487113)
-    if ($config['login_lc']) {
-      if ($config['login_lc'] == 2 || $config['login_lc'] === true) {
-        $username = mb_strtolower($username);
-      }
-      else if (strpos($username, '@')) {
-        // lowercase domain name
-        list($local, $domain) = explode('@', $username);
-        $username = $local . '@' . mb_strtolower($domain);
-      }
+    /**
+     * Getter for compose responses.
+     * These are stored in local config and user preferences.
+     *
+     * @param boolean True to sort the list alphabetically
+     * @param boolean True if only this user's responses shall be listed
+     *
+     * @return array List of the current user's stored responses
+     */
+    public function get_compose_responses($sorted = false, $user_only = false)
+    {
+        $responses = array();
+
+        if (!$user_only) {
+            foreach ($this->config->get('compose_responses_static', array()) as $response) {
+                if (empty($response['key'])) {
+                    $response['key']    = substr(md5($response['name']), 0, 16);
+                }
+
+                $response['static'] = true;
+                $response['class']  = 'readonly';
+
+                $k = $sorted ? '0000-' . strtolower($response['name']) : $response['key'];
+                $responses[$k] = $response;
+            }
+        }
+
+        foreach ($this->config->get('compose_responses', array()) as $response) {
+            if (empty($response['key'])) {
+                $response['key'] = substr(md5($response['name']), 0, 16);
+            }
+
+            $k = $sorted ? strtolower($response['name']) : $response['key'];
+            $responses[$k] = $response;
+        }
+
+        // sort list by name
+        if ($sorted) {
+            ksort($responses, SORT_LOCALE_STRING);
+        }
+
+        return array_values($responses);
     }
 
-    // try to resolve email address from virtuser table
-    if (strpos($username, '@') && ($virtuser = rcube_user::email2user($username))) {
-      $username = $virtuser;
+    /**
+     * Init output object for GUI and add common scripts.
+     * This will instantiate a rcmail_output_html object and set
+     * environment vars according to the current session and configuration
+     *
+     * @param boolean True if this request is loaded in a (i)frame
+     *
+     * @return rcube_output Reference to HTML output object
+     */
+    public function load_gui($framed = false)
+    {
+        // init output page
+        if (!($this->output instanceof rcmail_output_html)) {
+            $this->output = new rcmail_output_html($this->task, $framed);
+        }
+
+        // set refresh interval
+        $this->output->set_env('refresh_interval', $this->config->get('refresh_interval', 0));
+        $this->output->set_env('session_lifetime', $this->config->get('session_lifetime', 0) * 60);
+
+        if ($framed) {
+            $this->comm_path .= '&_framed=1';
+            $this->output->set_env('framed', true);
+        }
+
+        $this->output->set_env('task', $this->task);
+        $this->output->set_env('action', $this->action);
+        $this->output->set_env('comm_path', $this->comm_path);
+        $this->output->set_charset(RCUBE_CHARSET);
+
+        if ($this->user && $this->user->ID) {
+            $this->output->set_env('user_id', $this->user->get_hash());
+        }
+
+        // add some basic labels to client
+        $this->output->add_label('loading', 'servererror', 'requesttimedout', 'refreshing');
+
+        return $this->output;
     }
 
-    // Here we need IDNA ASCII
-    // Only rcube_contacts class is using domain names in Unicode
-    $host     = rcube_utils::idn_to_ascii($host);
-    $username = rcube_utils::idn_to_ascii($username);
+    /**
+     * Create an output object for JSON responses
+     *
+     * @return rcube_output Reference to JSON output object
+     */
+    public function json_init()
+    {
+        if (!($this->output instanceof rcmail_output_json)) {
+            $this->output = new rcmail_output_json($this->task);
+        }
 
-    // user already registered -> overwrite username
-    if ($user = rcube_user::query($username, $host)) {
-      $username = $user->data['username'];
+        return $this->output;
     }
 
-    $storage = $this->get_storage();
+    /**
+     * Create session object and start the session.
+     */
+    public function session_init()
+    {
+        parent::session_init();
 
-    // try to log in
-    if (!$storage->connect($host, $username, $pass, $port, $ssl)) {
-      return false;
+        // set initial session vars
+        if (!$_SESSION['user_id']) {
+            $_SESSION['temp'] = true;
+        }
+
+        // restore skin selection after logout
+        if ($_SESSION['temp'] && !empty($_SESSION['skin'])) {
+            $this->config->set('skin', $_SESSION['skin']);
+        }
     }
 
-    // user already registered -> update user's record
-    if (is_object($user)) {
-      // update last login timestamp
-      $user->touch();
+    /**
+     * Perfom login to the mail server and to the webmail service.
+     * This will also create a new user entry if auto_create_user is configured.
+     *
+     * @param string Mail storage (IMAP) user name
+     * @param string Mail storage (IMAP) password
+     * @param string Mail storage (IMAP) host
+     * @param bool   Enables cookie check
+     *
+     * @return boolean True on success, False on failure
+     */
+    function login($username, $pass, $host = null, $cookiecheck = false)
+    {
+        $this->login_error = null;
+
+        if (empty($username)) {
+            return false;
+        }
+
+        if ($cookiecheck && empty($_COOKIE)) {
+            $this->login_error = self::ERROR_COOKIES_DISABLED;
+            return false;
+        }
+
+        $default_host    = $this->config->get('default_host');
+        $default_port    = $this->config->get('default_port');
+        $username_domain = $this->config->get('username_domain');
+        $login_lc        = $this->config->get('login_lc', 2);
+
+        if (!$host) {
+            $host = $default_host;
+        }
+
+        // Validate that selected host is in the list of configured hosts
+        if (is_array($default_host)) {
+            $allowed = false;
+
+            foreach ($default_host as $key => $host_allowed) {
+                if (!is_numeric($key)) {
+                    $host_allowed = $key;
+                }
+                if ($host == $host_allowed) {
+                    $allowed = true;
+                    break;
+                }
+            }
+
+            if (!$allowed) {
+                $host = null;
+            }
+        }
+        else if (!empty($default_host) && $host != rcube_utils::parse_host($default_host)) {
+            $host = null;
+        }
+
+        if (!$host) {
+            $this->login_error = self::ERROR_INVALID_HOST;
+            return false;
+        }
+
+        // parse $host URL
+        $a_host = parse_url($host);
+        if ($a_host['host']) {
+            $host = $a_host['host'];
+            $ssl  = (isset($a_host['scheme']) && in_array($a_host['scheme'], array('ssl','imaps','tls'))) ? $a_host['scheme'] : null;
+
+            if (!empty($a_host['port']))
+                $port = $a_host['port'];
+            else if ($ssl && $ssl != 'tls' && (!$default_port || $default_port == 143))
+                $port = 993;
+        }
+
+        if (!$port) {
+            $port = $default_port;
+        }
+
+        // Check if we need to add/force domain to username
+        if (!empty($username_domain)) {
+            $domain = is_array($username_domain) ? $username_domain[$host] : $username_domain;
+
+            if ($domain = rcube_utils::parse_host((string)$domain, $host)) {
+                $pos = strpos($username, '@');
+
+                // force configured domains
+                if ($pos !== false && $this->config->get('username_domain_forced')) {
+                    $username = substr($username, 0, $pos) . '@' . $domain;
+                }
+                // just add domain if not specified
+                else if ($pos === false) {
+                    $username .= '@' . $domain;
+                }
+            }
+        }
+
+        // Convert username to lowercase. If storage backend
+        // is case-insensitive we need to store always the same username (#1487113)
+        if ($login_lc) {
+            if ($login_lc == 2 || $login_lc === true) {
+                $username = mb_strtolower($username);
+            }
+            else if (strpos($username, '@')) {
+                // lowercase domain name
+                list($local, $domain) = explode('@', $username);
+                $username = $local . '@' . mb_strtolower($domain);
+            }
+        }
+
+        // try to resolve email address from virtuser table
+        if (strpos($username, '@') && ($virtuser = rcube_user::email2user($username))) {
+            $username = $virtuser;
+        }
+
+        // Here we need IDNA ASCII
+        // Only rcube_contacts class is using domain names in Unicode
+        $host     = rcube_utils::idn_to_ascii($host);
+        $username = rcube_utils::idn_to_ascii($username);
+
+        // user already registered -> overwrite username
+        if ($user = rcube_user::query($username, $host)) {
+            $username = $user->data['username'];
+        }
+
+        $storage = $this->get_storage();
+
+        // try to log in
+        if (!$storage->connect($host, $username, $pass, $port, $ssl)) {
+            return false;
+        }
+
+        // user already registered -> update user's record
+        if (is_object($user)) {
+            // update last login timestamp
+            $user->touch();
+        }
+        // create new system user
+        else if ($this->config->get('auto_create_user')) {
+            if ($created = rcube_user::create($username, $host)) {
+                $user = $created;
+            }
+            else {
+                self::raise_error(array(
+                        'code'    => 620,
+                        'file'    => __FILE__,
+                        'line'    => __LINE__,
+                        'message' => "Failed to create a user record. Maybe aborted by a plugin?"
+                    ),
+                    true, false);
+            }
+        }
+        else {
+            self::raise_error(array(
+                    'code'    => 621,
+                    'file'    => __FILE__,
+                    'line'    => __LINE__,
+                    'message' => "Access denied for new user $username. 'auto_create_user' is disabled"
+                ),
+                true, false);
+        }
+
+        // login succeeded
+        if (is_object($user) && $user->ID) {
+            // Configure environment
+            $this->set_user($user);
+            $this->set_storage_prop();
+
+            // set session vars
+            $_SESSION['user_id']      = $user->ID;
+            $_SESSION['username']     = $user->data['username'];
+            $_SESSION['storage_host'] = $host;
+            $_SESSION['storage_port'] = $port;
+            $_SESSION['storage_ssl']  = $ssl;
+            $_SESSION['password']     = $this->encrypt($pass);
+            $_SESSION['login_time']   = time();
+
+            if (isset($_REQUEST['_timezone']) && $_REQUEST['_timezone'] != '_default_') {
+                $_SESSION['timezone'] = rcube_utils::get_input_value('_timezone', rcube_utils::INPUT_GPC);
+            }
+
+            // fix some old settings according to namespace prefix
+            $this->fix_namespace_settings($user);
+
+            // create default folders on login
+            if ($this->config->get('create_default_folders')) {
+                $storage->create_default_folders();
+            }
+
+            // clear all mailboxes related cache(s)
+            $storage->clear_cache('mailboxes', true);
+
+            return true;
+        }
+
+        return false;
     }
-    // create new system user
-    else if ($config['auto_create_user']) {
-      if ($created = rcube_user::create($username, $host)) {
-        $user = $created;
-      }
-      else {
-        self::raise_error(array(
-          'code' => 620, 'type' => 'php',
-          'file' => __FILE__, 'line' => __LINE__,
-          'message' => "Failed to create a user record. Maybe aborted by a plugin?"
-          ), true, false);
-      }
-    }
-    else {
-      self::raise_error(array(
-        'code' => 621, 'type' => 'php',
-        'file' => __FILE__, 'line' => __LINE__,
-        'message' => "Access denied for new user $username. 'auto_create_user' is disabled"
-        ), true, false);
-    }
-
-    // login succeeded
-    if (is_object($user) && $user->ID) {
-      // Configure environment
-      $this->set_user($user);
-      $this->set_storage_prop();
-
-      // fix some old settings according to namespace prefix
-      $this->fix_namespace_settings($user);
-
-      // create default folders on first login
-      if ($config['create_default_folders'] && (!empty($created) || empty($user->data['last_login']))) {
-        $storage->create_default_folders();
-      }
-
-      // set session vars
-      $_SESSION['user_id']      = $user->ID;
-      $_SESSION['username']     = $user->data['username'];
-      $_SESSION['storage_host'] = $host;
-      $_SESSION['storage_port'] = $port;
-      $_SESSION['storage_ssl']  = $ssl;
-      $_SESSION['password']     = $this->encrypt($pass);
-      $_SESSION['login_time']   = time();
-
-      if (isset($_REQUEST['_timezone']) && $_REQUEST['_timezone'] != '_default_')
-        $_SESSION['timezone'] = rcube_utils::get_input_value('_timezone', rcube_utils::INPUT_GPC);
-
-      // force reloading complete list of subscribed mailboxes
-      $storage->clear_cache('mailboxes', true);
-
-      return true;
-    }
-
-    return false;
-  }
-
 
     /**
      * Returns error code of last login operation
@@ -579,342 +674,317 @@
         }
     }
 
+    /**
+     * Auto-select IMAP host based on the posted login information
+     *
+     * @return string Selected IMAP host
+     */
+    public function autoselect_host()
+    {
+        $default_host = $this->config->get('default_host');
+        $host         = null;
 
-  /**
-   * Auto-select IMAP host based on the posted login information
-   *
-   * @return string Selected IMAP host
-   */
-  public function autoselect_host()
-  {
-    $default_host = $this->config->get('default_host');
-    $host = null;
+        if (is_array($default_host)) {
+            $post_host = rcube_utils::get_input_value('_host', rcube_utils::INPUT_POST);
+            $post_user = rcube_utils::get_input_value('_user', rcube_utils::INPUT_POST);
 
-    if (is_array($default_host)) {
-      $post_host = rcube_utils::get_input_value('_host', rcube_utils::INPUT_POST);
-      $post_user = rcube_utils::get_input_value('_user', rcube_utils::INPUT_POST);
+            list(, $domain) = explode('@', $post_user);
 
-      list($user, $domain) = explode('@', $post_user);
+            // direct match in default_host array
+            if ($default_host[$post_host] || in_array($post_host, array_values($default_host))) {
+                $host = $post_host;
+            }
+            // try to select host by mail domain
+            else if (!empty($domain)) {
+                foreach ($default_host as $storage_host => $mail_domains) {
+                    if (is_array($mail_domains) && in_array_nocase($domain, $mail_domains)) {
+                        $host = $storage_host;
+                        break;
+                    }
+                    else if (stripos($storage_host, $domain) !== false || stripos(strval($mail_domains), $domain) !== false) {
+                        $host = is_numeric($storage_host) ? $mail_domains : $storage_host;
+                        break;
+                    }
+                }
+            }
 
-      // direct match in default_host array
-      if ($default_host[$post_host] || in_array($post_host, array_values($default_host))) {
-        $host = $post_host;
-      }
-      // try to select host by mail domain
-      else if (!empty($domain)) {
-        foreach ($default_host as $storage_host => $mail_domains) {
-          if (is_array($mail_domains) && in_array_nocase($domain, $mail_domains)) {
-            $host = $storage_host;
-            break;
-          }
-          else if (stripos($storage_host, $domain) !== false || stripos(strval($mail_domains), $domain) !== false) {
-            $host = is_numeric($storage_host) ? $mail_domains : $storage_host;
-            break;
-          }
+            // take the first entry if $host is still not set
+            if (empty($host)) {
+                list($key, $val) = each($default_host);
+                $host = is_numeric($key) ? $val : $key;
+            }
         }
-      }
-
-      // take the first entry if $host is still not set
-      if (empty($host)) {
-        list($key, $val) = each($default_host);
-        $host = is_numeric($key) ? $val : $key;
-      }
-    }
-    else if (empty($default_host)) {
-      $host = rcube_utils::get_input_value('_host', rcube_utils::INPUT_POST);
-    }
-    else
-      $host = rcube_utils::parse_host($default_host);
-
-    return $host;
-  }
-
-
-  /**
-   * Destroy session data and remove cookie
-   */
-  public function kill_session()
-  {
-    $this->plugins->exec_hook('session_destroy');
-
-    $this->session->kill();
-    $_SESSION = array('language' => $this->user->language, 'temp' => true, 'skin' => $this->config->get('skin'));
-    $this->user->reset();
-  }
-
-
-  /**
-   * Do server side actions on logout
-   */
-  public function logout_actions()
-  {
-    $config  = $this->config->all();
-    $storage = $this->get_storage();
-
-    if ($config['logout_purge'] && !empty($config['trash_mbox'])) {
-      $storage->clear_folder($config['trash_mbox']);
-    }
-
-    if ($config['logout_expunge']) {
-      $storage->expunge_folder('INBOX');
-    }
-
-    // Try to save unsaved user preferences
-    if (!empty($_SESSION['preferences'])) {
-      $this->user->save_prefs(unserialize($_SESSION['preferences']));
-    }
-  }
-
-
-  /**
-   * Generate a unique token to be used in a form request
-   *
-   * @return string The request token
-   */
-  public function get_request_token()
-  {
-    $sess_id = $_COOKIE[ini_get('session.name')];
-    if (!$sess_id) $sess_id = session_id();
-
-    $plugin = $this->plugins->exec_hook('request_token', array(
-        'value' => md5('RT' . $this->get_user_id() . $this->config->get('des_key') . $sess_id)));
-
-    return $plugin['value'];
-  }
-
-
-  /**
-   * Check if the current request contains a valid token
-   *
-   * @param int Request method
-   * @return boolean True if request token is valid false if not
-   */
-  public function check_request($mode = rcube_utils::INPUT_POST)
-  {
-    $token = rcube_utils::get_input_value('_token', $mode);
-    $sess_id = $_COOKIE[ini_get('session.name')];
-    return !empty($sess_id) && $token == $this->get_request_token();
-  }
-
-
-  /**
-   * Create unique authorization hash
-   *
-   * @param string Session ID
-   * @param int Timestamp
-   * @return string The generated auth hash
-   */
-  private function get_auth_hash($sess_id, $ts)
-  {
-    $auth_string = sprintf('rcmail*sess%sR%s*Chk:%s;%s',
-      $sess_id,
-      $ts,
-      $this->config->get('ip_check') ? $_SERVER['REMOTE_ADDR'] : '***.***.***.***',
-      $_SERVER['HTTP_USER_AGENT']);
-
-    if (function_exists('sha1'))
-      return sha1($auth_string);
-    else
-      return md5($auth_string);
-  }
-
-
-  /**
-   * Build a valid URL to this instance of Roundcube
-   *
-   * @param mixed Either a string with the action or url parameters as key-value pairs
-   *
-   * @return string Valid application URL
-   */
-  public function url($p)
-  {
-    if (!is_array($p)) {
-      if (strpos($p, 'http') === 0)
-        return $p;
-
-      $p = array('_action' => @func_get_arg(0));
-    }
-
-    $task = $p['_task'] ? $p['_task'] : ($p['task'] ? $p['task'] : $this->task);
-    $p['_task'] = $task;
-    unset($p['task']);
-
-    $url = './';
-    $delm = '?';
-    foreach (array_reverse($p) as $key => $val) {
-      if ($val !== '' && $val !== null) {
-        $par = $key[0] == '_' ? $key : '_'.$key;
-        $url .= $delm.urlencode($par).'='.urlencode($val);
-        $delm = '&';
-      }
-    }
-    return $url;
-  }
-
-
-  /**
-   * Function to be executed in script shutdown
-   */
-  public function shutdown()
-  {
-    parent::shutdown();
-
-    foreach ($this->address_books as $book) {
-      if (is_object($book) && is_a($book, 'rcube_addressbook'))
-        $book->close();
-    }
-
-    // before closing the database connection, write session data
-    if ($_SERVER['REMOTE_ADDR'] && is_object($this->session)) {
-      session_write_close();
-    }
-
-    // write performance stats to logs/console
-    if ($this->config->get('devel_mode')) {
-      if (function_exists('memory_get_usage'))
-        $mem = $this->show_bytes(memory_get_usage());
-      if (function_exists('memory_get_peak_usage'))
-        $mem .= '/'.$this->show_bytes(memory_get_peak_usage());
-
-      $log = $this->task . ($this->action ? '/'.$this->action : '') . ($mem ? " [$mem]" : '');
-      if (defined('RCMAIL_START'))
-        self::print_timer(RCMAIL_START, $log);
-      else
-        self::console($log);
-    }
-  }
-
-
-  /**
-   * Registers action aliases for current task
-   *
-   * @param array $map Alias-to-filename hash array
-   */
-  public function register_action_map($map)
-  {
-    if (is_array($map)) {
-      foreach ($map as $idx => $val) {
-        $this->action_map[$idx] = $val;
-      }
-    }
-  }
-
-
-  /**
-   * Returns current action filename
-   *
-   * @param array $map Alias-to-filename hash array
-   */
-  public function get_action_file()
-  {
-    if (!empty($this->action_map[$this->action])) {
-      return $this->action_map[$this->action];
-    }
-
-    return strtr($this->action, '-', '_') . '.inc';
-  }
-
-
-  /**
-   * Fixes some user preferences according to namespace handling change.
-   * Old Roundcube versions were using folder names with removed namespace prefix.
-   * Now we need to add the prefix on servers where personal namespace has prefix.
-   *
-   * @param rcube_user $user User object
-   */
-  private function fix_namespace_settings($user)
-  {
-    $prefix     = $this->storage->get_namespace('prefix');
-    $prefix_len = strlen($prefix);
-
-    if (!$prefix_len)
-      return;
-
-    $prefs = $this->config->all();
-    if (!empty($prefs['namespace_fixed']))
-      return;
-
-    // Build namespace prefix regexp
-    $ns     = $this->storage->get_namespace();
-    $regexp = array();
-
-    foreach ($ns as $entry) {
-      if (!empty($entry)) {
-        foreach ($entry as $item) {
-          if (strlen($item[0])) {
-            $regexp[] = preg_quote($item[0], '/');
-          }
+        else if (empty($default_host)) {
+            $host = rcube_utils::get_input_value('_host', rcube_utils::INPUT_POST);
         }
-      }
-    }
-    $regexp = '/^('. implode('|', $regexp).')/';
-
-    // Fix preferences
-    $opts = array('drafts_mbox', 'junk_mbox', 'sent_mbox', 'trash_mbox', 'archive_mbox');
-    foreach ($opts as $opt) {
-      if ($value = $prefs[$opt]) {
-        if ($value != 'INBOX' && !preg_match($regexp, $value)) {
-          $prefs[$opt] = $prefix.$value;
+        else {
+            $host = rcube_utils::parse_host($default_host);
         }
-      }
+
+        return $host;
     }
 
-    if (!empty($prefs['default_folders'])) {
-      foreach ($prefs['default_folders'] as $idx => $name) {
-        if ($name != 'INBOX' && !preg_match($regexp, $name)) {
-          $prefs['default_folders'][$idx] = $prefix.$name;
+    /**
+     * Destroy session data and remove cookie
+     */
+    public function kill_session()
+    {
+        $this->plugins->exec_hook('session_destroy');
+
+        $this->session->kill();
+        $_SESSION = array('language' => $this->user->language, 'temp' => true, 'skin' => $this->config->get('skin'));
+        $this->user->reset();
+    }
+
+    /**
+     * Do server side actions on logout
+     */
+    public function logout_actions()
+    {
+        $config  = $this->config->all();
+        $storage = $this->get_storage();
+
+        if ($config['logout_purge'] && !empty($config['trash_mbox'])) {
+            $storage->clear_folder($config['trash_mbox']);
         }
-      }
-    }
 
-    if (!empty($prefs['search_mods'])) {
-      $folders = array();
-      foreach ($prefs['search_mods'] as $idx => $value) {
-        if ($idx != 'INBOX' && $idx != '*' && !preg_match($regexp, $idx)) {
-          $idx = $prefix.$idx;
+        if ($config['logout_expunge']) {
+            $storage->expunge_folder('INBOX');
         }
-        $folders[$idx] = $value;
-      }
-      $prefs['search_mods'] = $folders;
-    }
 
-    if (!empty($prefs['message_threading'])) {
-      $folders = array();
-      foreach ($prefs['message_threading'] as $idx => $value) {
-        if ($idx != 'INBOX' && !preg_match($regexp, $idx)) {
-          $idx = $prefix.$idx;
+        // Try to save unsaved user preferences
+        if (!empty($_SESSION['preferences'])) {
+            $this->user->save_prefs(unserialize($_SESSION['preferences']));
         }
-        $folders[$prefix.$idx] = $value;
-      }
-      $prefs['message_threading'] = $folders;
     }
 
-    if (!empty($prefs['collapsed_folders'])) {
-      $folders     = explode('&&', $prefs['collapsed_folders']);
-      $count       = count($folders);
-      $folders_str = '';
+    /**
+     * Generate a unique token to be used in a form request
+     *
+     * @return string The request token
+     */
+    public function get_request_token()
+    {
+        $sess_id = $_COOKIE[ini_get('session.name')];
 
-      if ($count) {
-          $folders[0]        = substr($folders[0], 1);
-          $folders[$count-1] = substr($folders[$count-1], 0, -1);
-      }
-
-      foreach ($folders as $value) {
-        if ($value != 'INBOX' && !preg_match($regexp, $value)) {
-          $value = $prefix.$value;
+        if (!$sess_id) {
+            $sess_id = session_id();
         }
-        $folders_str .= '&'.$value.'&';
-      }
-      $prefs['collapsed_folders'] = $folders_str;
+
+        $plugin = $this->plugins->exec_hook('request_token', array(
+            'value' => md5('RT' . $this->get_user_id() . $this->config->get('des_key') . $sess_id)));
+
+        return $plugin['value'];
     }
 
-    $prefs['namespace_fixed'] = true;
+    /**
+     * Check if the current request contains a valid token
+     *
+     * @param int Request method
+     *
+     * @return boolean True if request token is valid false if not
+     */
+    public function check_request($mode = rcube_utils::INPUT_POST)
+    {
+        $token   = rcube_utils::get_input_value('_token', $mode);
+        $sess_id = $_COOKIE[ini_get('session.name')];
 
-    // save updated preferences and reset imap settings (default folders)
-    $user->save_prefs($prefs);
-    $this->set_storage_prop();
-  }
+        return !empty($sess_id) && $token == $this->get_request_token();
+    }
 
+    /**
+     * Build a valid URL to this instance of Roundcube
+     *
+     * @param mixed Either a string with the action or url parameters as key-value pairs
+     *
+     * @return string Valid application URL
+     */
+    public function url($p)
+    {
+        if (!is_array($p)) {
+            if (strpos($p, 'http') === 0) {
+                return $p;
+            }
+
+            $p = array('_action' => @func_get_arg(0));
+        }
+
+        $task = $p['_task'] ? $p['_task'] : ($p['task'] ? $p['task'] : $this->task);
+        $p['_task'] = $task;
+        unset($p['task']);
+
+        $url  = './' . $this->filename;
+        $delm = '?';
+
+        foreach (array_reverse($p) as $key => $val) {
+            if ($val !== '' && $val !== null) {
+                $par  = $key[0] == '_' ? $key : '_'.$key;
+                $url .= $delm.urlencode($par).'='.urlencode($val);
+                $delm = '&';
+            }
+        }
+
+        return $url;
+    }
+
+    /**
+     * Function to be executed in script shutdown
+     */
+    public function shutdown()
+    {
+        parent::shutdown();
+
+        foreach ($this->address_books as $book) {
+            if (is_object($book) && is_a($book, 'rcube_addressbook'))
+                $book->close();
+        }
+
+        // write performance stats to logs/console
+        if ($this->config->get('devel_mode')) {
+            if (function_exists('memory_get_usage'))
+                $mem = $this->show_bytes(memory_get_usage());
+            if (function_exists('memory_get_peak_usage'))
+                $mem .= '/'.$this->show_bytes(memory_get_peak_usage());
+
+            $log = $this->task . ($this->action ? '/'.$this->action : '') . ($mem ? " [$mem]" : '');
+
+            if (defined('RCMAIL_START'))
+                self::print_timer(RCMAIL_START, $log);
+            else
+                self::console($log);
+        }
+    }
+
+    /**
+     * Registers action aliases for current task
+     *
+     * @param array $map Alias-to-filename hash array
+     */
+    public function register_action_map($map)
+    {
+        if (is_array($map)) {
+            foreach ($map as $idx => $val) {
+                $this->action_map[$idx] = $val;
+            }
+        }
+    }
+
+    /**
+     * Returns current action filename
+     *
+     * @param array $map Alias-to-filename hash array
+     */
+    public function get_action_file()
+    {
+        if (!empty($this->action_map[$this->action])) {
+            return $this->action_map[$this->action];
+        }
+
+        return strtr($this->action, '-', '_') . '.inc';
+    }
+
+    /**
+     * Fixes some user preferences according to namespace handling change.
+     * Old Roundcube versions were using folder names with removed namespace prefix.
+     * Now we need to add the prefix on servers where personal namespace has prefix.
+     *
+     * @param rcube_user $user User object
+     */
+    private function fix_namespace_settings($user)
+    {
+        $prefix     = $this->storage->get_namespace('prefix');
+        $prefix_len = strlen($prefix);
+
+        if (!$prefix_len)
+            return;
+
+        $prefs = $this->config->all();
+        if (!empty($prefs['namespace_fixed']))
+            return;
+
+        // Build namespace prefix regexp
+        $ns     = $this->storage->get_namespace();
+        $regexp = array();
+
+        foreach ($ns as $entry) {
+            if (!empty($entry)) {
+                foreach ($entry as $item) {
+                    if (strlen($item[0])) {
+                        $regexp[] = preg_quote($item[0], '/');
+                    }
+                }
+            }
+        }
+        $regexp = '/^('. implode('|', $regexp).')/';
+
+        // Fix preferences
+        $opts = array('drafts_mbox', 'junk_mbox', 'sent_mbox', 'trash_mbox', 'archive_mbox');
+        foreach ($opts as $opt) {
+            if ($value = $prefs[$opt]) {
+                if ($value != 'INBOX' && !preg_match($regexp, $value)) {
+                    $prefs[$opt] = $prefix.$value;
+                }
+            }
+        }
+
+        if (!empty($prefs['default_folders'])) {
+            foreach ($prefs['default_folders'] as $idx => $name) {
+                if ($name != 'INBOX' && !preg_match($regexp, $name)) {
+                    $prefs['default_folders'][$idx] = $prefix.$name;
+                }
+            }
+        }
+
+        if (!empty($prefs['search_mods'])) {
+            $folders = array();
+            foreach ($prefs['search_mods'] as $idx => $value) {
+                if ($idx != 'INBOX' && $idx != '*' && !preg_match($regexp, $idx)) {
+                    $idx = $prefix.$idx;
+                }
+                $folders[$idx] = $value;
+            }
+
+            $prefs['search_mods'] = $folders;
+        }
+
+        if (!empty($prefs['message_threading'])) {
+            $folders = array();
+            foreach ($prefs['message_threading'] as $idx => $value) {
+                if ($idx != 'INBOX' && !preg_match($regexp, $idx)) {
+                    $idx = $prefix.$idx;
+                }
+                $folders[$prefix.$idx] = $value;
+            }
+
+            $prefs['message_threading'] = $folders;
+        }
+
+        if (!empty($prefs['collapsed_folders'])) {
+            $folders     = explode('&&', $prefs['collapsed_folders']);
+            $count       = count($folders);
+            $folders_str = '';
+
+            if ($count) {
+                $folders[0]        = substr($folders[0], 1);
+                $folders[$count-1] = substr($folders[$count-1], 0, -1);
+            }
+
+            foreach ($folders as $value) {
+                if ($value != 'INBOX' && !preg_match($regexp, $value)) {
+                    $value = $prefix.$value;
+                }
+                $folders_str .= '&'.$value.'&';
+            }
+
+            $prefs['collapsed_folders'] = $folders_str;
+        }
+
+        $prefs['namespace_fixed'] = true;
+
+        // save updated preferences and reset imap settings (default folders)
+        $user->save_prefs($prefs);
+        $this->set_storage_prop();
+    }
 
     /**
      * Overwrite action variable
@@ -927,189 +997,17 @@
         $this->output->set_env('action', $action);
     }
 
-
     /**
-     * Send the given message using the configured method.
-     *
-     * @param object $message    Reference to Mail_MIME object
-     * @param string $from       Sender address string
-     * @param array  $mailto     Array of recipient address strings
-     * @param array  $error      SMTP error array (reference)
-     * @param string $body_file  Location of file with saved message body (reference),
-     *                           used when delay_file_io is enabled
-     * @param array  $options    SMTP options (e.g. DSN request)
-     *
-     * @return boolean Send status.
+     * Set environment variables for specified config options
      */
-    public function deliver_message(&$message, $from, $mailto, &$error, &$body_file = null, $options = null)
+    public function set_env_config($options)
     {
-        $plugin = $this->plugins->exec_hook('message_before_send', array(
-            'message' => $message,
-            'from'    => $from,
-            'mailto'  => $mailto,
-            'options' => $options,
-        ));
-
-        $from    = $plugin['from'];
-        $mailto  = $plugin['mailto'];
-        $options = $plugin['options'];
-        $message = $plugin['message'];
-        $headers = $message->headers();
-
-        // send thru SMTP server using custom SMTP library
-        if ($this->config->get('smtp_server')) {
-            // generate list of recipients
-            $a_recipients = array($mailto);
-
-            if (strlen($headers['Cc']))
-                $a_recipients[] = $headers['Cc'];
-            if (strlen($headers['Bcc']))
-                $a_recipients[] = $headers['Bcc'];
-
-            // clean Bcc from header for recipients
-            $send_headers = $headers;
-            unset($send_headers['Bcc']);
-            // here too, it because txtHeaders() below use $message->_headers not only $send_headers
-            unset($message->_headers['Bcc']);
-
-            $smtp_headers = $message->txtHeaders($send_headers, true);
-
-            if ($message->getParam('delay_file_io')) {
-                // use common temp dir
-                $temp_dir = $this->config->get('temp_dir');
-                $body_file = tempnam($temp_dir, 'rcmMsg');
-                if (PEAR::isError($mime_result = $message->saveMessageBody($body_file))) {
-                    self::raise_error(array('code' => 650, 'type' => 'php',
-                        'file' => __FILE__, 'line' => __LINE__,
-                        'message' => "Could not create message: ".$mime_result->getMessage()),
-                        TRUE, FALSE);
-                    return false;
-                }
-                $msg_body = fopen($body_file, 'r');
-            }
-            else {
-                $msg_body = $message->get();
-            }
-
-            // send message
-            if (!is_object($this->smtp)) {
-                $this->smtp_init(true);
-            }
-
-            $sent     = $this->smtp->send_mail($from, $a_recipients, $smtp_headers, $msg_body, $options);
-            $response = $this->smtp->get_response();
-            $error    = $this->smtp->get_error();
-
-            // log error
-            if (!$sent) {
-                self::raise_error(array('code' => 800, 'type' => 'smtp',
-                    'line' => __LINE__, 'file' => __FILE__,
-                    'message' => "SMTP error: ".join("\n", $response)), TRUE, FALSE);
+        foreach ((array) $options as $option) {
+            if ($this->config->get($option)) {
+                $this->output->set_env($option, true);
             }
         }
-        // send mail using PHP's mail() function
-        else {
-            // unset some headers because they will be added by the mail() function
-            $headers_enc = $message->headers($headers);
-            $headers_php = $message->_headers;
-            unset($headers_php['To'], $headers_php['Subject']);
-
-            // reset stored headers and overwrite
-            $message->_headers = array();
-            $header_str = $message->txtHeaders($headers_php);
-
-            // #1485779
-            if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
-                if (preg_match_all('/<([^@]+@[^>]+)>/', $headers_enc['To'], $m)) {
-                    $headers_enc['To'] = implode(', ', $m[1]);
-                }
-            }
-
-            $msg_body = $message->get();
-
-            if (PEAR::isError($msg_body)) {
-                self::raise_error(array('code' => 650, 'type' => 'php',
-                    'file' => __FILE__, 'line' => __LINE__,
-                    'message' => "Could not create message: ".$msg_body->getMessage()),
-                    TRUE, FALSE);
-            }
-            else {
-                $delim   = $this->config->header_delimiter();
-                $to      = $headers_enc['To'];
-                $subject = $headers_enc['Subject'];
-                $header_str = rtrim($header_str);
-
-                if ($delim != "\r\n") {
-                    $header_str = str_replace("\r\n", $delim, $header_str);
-                    $msg_body   = str_replace("\r\n", $delim, $msg_body);
-                    $to         = str_replace("\r\n", $delim, $to);
-                    $subject    = str_replace("\r\n", $delim, $subject);
-                }
-
-                if (ini_get('safe_mode'))
-                    $sent = mail($to, $subject, $msg_body, $header_str);
-                else
-                    $sent = mail($to, $subject, $msg_body, $header_str, "-f$from");
-            }
-        }
-
-        if ($sent) {
-            $this->plugins->exec_hook('message_sent', array('headers' => $headers, 'body' => $msg_body));
-
-            // remove MDN headers after sending
-            unset($headers['Return-Receipt-To'], $headers['Disposition-Notification-To']);
-
-            // get all recipients
-            if ($headers['Cc'])
-                $mailto .= $headers['Cc'];
-            if ($headers['Bcc'])
-                $mailto .= $headers['Bcc'];
-            if (preg_match_all('/<([^@]+@[^>]+)>/', $mailto, $m))
-                $mailto = implode(', ', array_unique($m[1]));
-
-            if ($this->config->get('smtp_log')) {
-                self::write_log('sendmail', sprintf("User %s [%s]; Message for %s; %s",
-                    $this->user->get_username(),
-                    $_SERVER['REMOTE_ADDR'],
-                    $mailto,
-                    !empty($response) ? join('; ', $response) : ''));
-            }
-        }
-
-        if (is_resource($msg_body)) {
-            fclose($msg_body);
-        }
-
-        $message->_headers = array();
-        $message->headers($headers);
-
-        return $sent;
     }
-
-
-    /**
-     * Unique Message-ID generator.
-     *
-     * @return string Message-ID
-     */
-    public function gen_message_id()
-    {
-        $local_part  = md5(uniqid('rcmail'.mt_rand(),true));
-        $domain_part = $this->user->get_username('domain');
-
-        // Try to find FQDN, some spamfilters doesn't like 'localhost' (#1486924)
-        if (!preg_match('/\.[a-z]+$/i', $domain_part)) {
-            foreach (array($_SERVER['HTTP_HOST'], $_SERVER['SERVER_NAME']) as $host) {
-                $host = preg_replace('/:[0-9]+$/', '', $host);
-                if ($host && preg_match('/\.[a-z]+$/i', $host)) {
-                    $domain_part = $host;
-                }
-            }
-        }
-
-        return sprintf('<%s@%s>', $local_part, $domain_part);
-    }
-
 
     /**
      * Returns RFC2822 formatted current date in user's timezone
@@ -1130,28 +1028,36 @@
         return $date->format('r');
     }
 
-
     /**
      * Write login data (name, ID, IP address) to the 'userlogins' log file.
      */
-    public function log_login()
+    public function log_login($user = null, $failed_login = false, $error_code = 0)
     {
         if (!$this->config->get('log_logins')) {
             return;
         }
 
-        $user_name = $this->get_user_name();
-        $user_id   = $this->get_user_id();
+        // failed login
+        if ($failed_login) {
+            $message = sprintf('Failed login for %s from %s in session %s (error: %d)',
+                $user, rcube_utils::remote_ip(), session_id(), $error_code);
+        }
+        // successful login
+        else {
+            $user_name = $this->get_user_name();
+            $user_id   = $this->get_user_id();
 
-        if (!$user_id) {
-            return;
+            if (!$user_id) {
+                return;
+            }
+
+            $message = sprintf('Successful login for %s (ID: %d) from %s in session %s',
+                $user_name, $user_id, rcube_utils::remote_ip(), session_id());
         }
 
-        self::write_log('userlogins',
-            sprintf('Successful login for %s (ID: %d) from %s in session %s',
-                $user_name, $user_id, rcube_utils::remote_ip(), session_id()));
+        // log login
+        self::write_log('userlogins', $message);
     }
-
 
     /**
      * Create a HTML table based on the given data
@@ -1165,7 +1071,7 @@
      */
     public function table_output($attrib, $table_data, $a_show_cols, $id_col)
     {
-        $table = new html_table(/*array('cols' => count($a_show_cols))*/);
+        $table = new html_table($attrib);
 
         // add table header
         if (!$attrib['noheader']) {
@@ -1201,7 +1107,6 @@
 
         return $table->show($attrib);
     }
-
 
     /**
      * Convert the given date to a human readable form
@@ -1332,7 +1237,6 @@
         return $out;
     }
 
-
     /**
      * Return folders list in HTML
      *
@@ -1404,17 +1308,26 @@
         }
         else {
             $js_mailboxlist = array();
-            $out = html::tag('ul', $attrib, $rcmail->render_folder_tree_html($a_mailboxes, $mbox_name, $js_mailboxlist, $attrib), html::$common_attrib);
+            $tree = $rcmail->render_folder_tree_html($a_mailboxes, $mbox_name, $js_mailboxlist, $attrib);
 
-            $rcmail->output->add_gui_object('mailboxlist', $attrib['id']);
+            if ($type != 'js') {
+                $out = html::tag('ul', $attrib, $tree, html::$common_attrib);
+
+                $rcmail->output->include_script('treelist.js');
+                $rcmail->output->add_gui_object('mailboxlist', $attrib['id']);
+                $rcmail->output->set_env('unreadwrap', $attrib['unreadwrap']);
+                $rcmail->output->set_env('collapsed_folders', (string)$rcmail->config->get('collapsed_folders'));
+            }
+
             $rcmail->output->set_env('mailboxes', $js_mailboxlist);
-            $rcmail->output->set_env('unreadwrap', $attrib['unreadwrap']);
-            $rcmail->output->set_env('collapsed_folders', (string)$rcmail->config->get('collapsed_folders'));
+
+            // we can't use object keys in javascript because they are unordered
+            // we need sorted folders list for folder-selector widget
+            $rcmail->output->set_env('mailboxes_list', array_keys($js_mailboxlist));
         }
 
         return $out;
     }
-
 
     /**
      * Return folders list as html_select object
@@ -1442,10 +1355,29 @@
 
         $delimiter = $storage->get_hierarchy_delimiter();
 
-        foreach ($list as $folder) {
-            if (empty($p['exceptions']) || !in_array($folder, $p['exceptions'])) {
-                $this->build_folder_tree($a_mailboxes, $folder, $delimiter);
+        if (!empty($p['exceptions'])) {
+            $list = array_diff($list, (array) $p['exceptions']);
+        }
+
+        if (!empty($p['additional'])) {
+            foreach ($p['additional'] as $add_folder) {
+                $add_items = explode($delimiter, $add_folder);
+                $folder    = '';
+                while (count($add_items)) {
+                    $folder .= array_shift($add_items);
+
+                    // @TODO: sorting
+                    if (!in_array($folder, $list)) {
+                        $list[] = $folder;
+                    }
+
+                    $folder .= $delimiter;
+                }
             }
+        }
+
+        foreach ($list as $folder) {
+            $this->build_folder_tree($a_mailboxes, $folder, $delimiter);
         }
 
         $select = new html_select($p);
@@ -1458,7 +1390,6 @@
 
         return $select;
     }
-
 
     /**
      * Create a hierarchical array of the mailbox list
@@ -1517,7 +1448,6 @@
         }
     }
 
-
     /**
      * Return html for a structured list &lt;ul&gt; for the mailbox tree
      */
@@ -1527,9 +1457,10 @@
         $realnames = (bool)$attrib['realnames'];
         $msgcounts = $this->storage->get_cache('messagecount');
         $collapsed = $this->config->get('collapsed_folders');
+        $realnames = $this->config->get('show_real_foldernames');
 
         $out = '';
-        foreach ($arrFolders as $key => $folder) {
+        foreach ($arrFolders as $folder) {
             $title        = null;
             $folder_class = $this->folder_classname($folder['id']);
             $is_collapsed = strpos($collapsed, '&'.rawurlencode($folder['id']).'&') !== false;
@@ -1584,18 +1515,21 @@
                 'id' => "rcmli".$folder_id,
                 'class' => join(' ', $classes),
                 'noclose' => true),
-                html::a($link_attrib, $html_name) .
-                (!empty($folder['folders']) ? html::div(array(
-                    'class' => ($is_collapsed ? 'collapsed' : 'expanded'),
-                    'style' => "position:absolute",
-                    'onclick' => sprintf("%s.command('collapse-folder', '%s')", rcmail_output::JS_OBJECT_NAME, $js_name)
-                ), '&nbsp;') : ''));
+                html::a($link_attrib, $html_name));
 
-            $jslist[$folder_id] = array(
+            if (!empty($folder['folders'])) {
+                $out .= html::div('treetoggle ' . ($is_collapsed ? 'collapsed' : 'expanded'), '&nbsp;');
+            }
+
+            $jslist[$folder['id']] = array(
                 'id'      => $folder['id'],
                 'name'    => $foldername,
-                'virtual' => $folder['virtual']
+                'virtual' => $folder['virtual'],
             );
+
+            if (!empty($folder_class)) {
+                $jslist[$folder['id']]['class'] = $folder_class;
+            }
 
             if (!empty($folder['folders'])) {
                 $out .= html::tag('ul', array('style' => ($is_collapsed ? "display:none;" : null)),
@@ -1608,7 +1542,6 @@
         return $out;
     }
 
-
     /**
      * Return html for a flat list <select> for the mailbox tree
      */
@@ -1616,7 +1549,7 @@
     {
         $out = '';
 
-        foreach ($arrFolders as $key => $folder) {
+        foreach ($arrFolders as $folder) {
             // skip exceptions (and its subfolders)
             if (!empty($opts['exceptions']) && in_array($folder['id'], $opts['exceptions'])) {
                 continue;
@@ -1653,7 +1586,6 @@
         return $out;
     }
 
-
     /**
      * Return internal name for the given folder if it matches the configured special folders
      */
@@ -1672,23 +1604,42 @@
         }
     }
 
-
     /**
      * Try to localize the given IMAP folder name.
      * UTF-7 decode it in case no localized text was found
      *
-     * @param string $name  Folder name
+     * @param string $name      Folder name
+     * @param bool   $with_path Enable path localization
      *
      * @return string Localized folder name in UTF-8 encoding
      */
-    public function localize_foldername($name)
+    public function localize_foldername($name, $with_path = true)
     {
-        if ($folder_class = $this->folder_classname($name)) {
+        $realnames = $this->config->get('show_real_foldernames');
+
+        // try to localize path of the folder
+        if ($with_path && !$realnames) {
+            $storage   = $this->get_storage();
+            $delimiter = $storage->get_hierarchy_delimiter();
+            $path      = explode($delimiter, $name);
+            $count     = count($path);
+
+            if ($count > 1) {
+                for ($i = 0; $i < $count; $i++) {
+                    $folder = implode($delimiter, array_slice($path, 0, -$i));
+                    if ($folder_class = $this->folder_classname($folder)) {
+                        $name = implode($delimiter, array_slice($path, $count - $i));
+                        return $this->gettext($folder_class) . $delimiter . rcube_charset::convert($name, 'UTF7-IMAP');
+                    }
+                }
+            }
+        }
+
+        if (!$realnames && ($folder_class = $this->folder_classname($name))) {
             return $this->gettext($folder_class);
         }
-        else {
-            return rcube_charset::convert($name, 'UTF7-IMAP');
-        }
+
+        return rcube_charset::convert($name, 'UTF7-IMAP');
     }
 
 
@@ -1731,7 +1682,7 @@
 
         $rcmail->output->add_script('rcmail.set_quota('.rcube_output::json_serialize($quota).');', 'docready');
 
-        return html::span($attrib, '');
+        return html::span($attrib, '&nbsp;');
     }
 
 
@@ -1743,11 +1694,7 @@
         $quota_result = (array) $quota;
         $quota_result['type'] = isset($_SESSION['quota_display']) ? $_SESSION['quota_display'] : '';
 
-        if (!$quota['total'] && $this->config->get('quota_zero_as_unlimited')) {
-            $quota_result['title']   = $this->gettext('unlimited');
-            $quota_result['percent'] = 0;
-        }
-        else if ($quota['total']) {
+        if ($quota['total'] > 0) {
             if (!isset($quota['percent'])) {
                 $quota_result['percent'] = min(100, round(($quota['used']/max(1,$quota['total']))*100));
             }
@@ -1766,48 +1713,66 @@
             }
         }
         else {
-            $quota_result['title']   = $this->gettext('unknown');
+            $unlimited               = $this->config->get('quota_zero_as_unlimited');
+            $quota_result['title']   = $this->gettext($unlimited ? 'unlimited' : 'unknown');
             $quota_result['percent'] = 0;
         }
 
         return $quota_result;
     }
 
-
     /**
      * Outputs error message according to server error/response codes
      *
      * @param string $fallback       Fallback message label
      * @param array  $fallback_args  Fallback message label arguments
+     * @param string $suffix         Message label suffix
      */
-    public function display_server_error($fallback = null, $fallback_args = null)
+    public function display_server_error($fallback = null, $fallback_args = null, $suffix = '')
     {
         $err_code = $this->storage->get_error_code();
         $res_code = $this->storage->get_response_code();
+        $args     = array();
 
         if ($res_code == rcube_storage::NOPERM) {
-            $this->output->show_message('errornoperm', 'error');
+            $error = 'errornoperm';
         }
         else if ($res_code == rcube_storage::READONLY) {
-            $this->output->show_message('errorreadonly', 'error');
+            $error = 'errorreadonly';
+        }
+        else if ($res_code == rcube_storage::OVERQUOTA) {
+            $error = 'errorroverquota';
         }
         else if ($err_code && ($err_str = $this->storage->get_error_str())) {
             // try to detect access rights problem and display appropriate message
             if (stripos($err_str, 'Permission denied') !== false) {
-                $this->output->show_message('errornoperm', 'error');
+                $error = 'errornoperm';
+            }
+            // try to detect full mailbox problem and display appropriate message
+            // there can be e.g. "Quota exceeded" or "quotum would exceed"
+            else if (stripos($err_str, 'quot') !== false && stripos($err_str, 'exceed') !== false) {
+                $error = 'erroroverquota';
             }
             else {
-                $this->output->show_message('servererrormsg', 'error', array('msg' => $err_str));
+                $error = 'servererrormsg';
+                $args  = array('msg' => $err_str);
             }
         }
         else if ($err_code < 0) {
-            $this->output->show_message('storageerror', 'error');
+            $error = 'storageerror';
         }
         else if ($fallback) {
-            $this->output->show_message($fallback, 'error', $fallback_args);
+            $error = $fallback;
+            $args  = $fallback_args;
+        }
+
+        if ($error) {
+            if ($suffix && $this->text_exists($error . $suffix)) {
+                $error .= $suffix;
+            }
+            $this->output->show_message($error, 'error', $args);
         }
     }
-
 
     /**
      * Output HTML editor scripts
@@ -1849,7 +1814,6 @@
         $this->output->add_script("rcmail_editor_init($script)", 'docready');
     }
 
-
     /**
      * Replaces TinyMCE's emoticon images with plain-text representation
      *
@@ -1887,7 +1851,6 @@
         return preg_replace($search, $replace, $html);
     }
 
-
     /**
      * File upload progress handler.
      */
@@ -1919,14 +1882,14 @@
         $this->output->send();
     }
 
-
     /**
      * Initializes file uploading interface.
      */
     public function upload_init()
     {
         // Enable upload progress bar
-        if (($seconds = $this->config->get('upload_progress')) && ini_get('apc.rfc1867')) {
+        $rfc1867 = filter_var(ini_get('apc.rfc1867'), FILTER_VALIDATE_BOOLEAN);
+        if ($rfc1867 && ($seconds = $this->config->get('upload_progress'))) {
             if ($field_name = ini_get('apc.rfc1867_name')) {
                 $this->output->set_env('upload_progress_name', $field_name);
                 $this->output->set_env('upload_progress_time', (int) $seconds);
@@ -1936,18 +1899,18 @@
         // find max filesize value
         $max_filesize = parse_bytes(ini_get('upload_max_filesize'));
         $max_postsize = parse_bytes(ini_get('post_max_size'));
+
         if ($max_postsize && $max_postsize < $max_filesize) {
             $max_filesize = $max_postsize;
         }
 
         $this->output->set_env('max_filesize', $max_filesize);
-        $max_filesize = self::show_bytes($max_filesize);
+        $max_filesize = $this->show_bytes($max_filesize);
         $this->output->set_env('filesizeerror', $this->gettext(array(
             'name' => 'filesizeerror', 'vars' => array('size' => $max_filesize))));
 
         return $max_filesize;
     }
-
 
     /**
      * Initializes client-side autocompletion.
@@ -1974,7 +1937,6 @@
         $this->output->set_env('autocomplete_min_length', $this->config->get('autocomplete_min_length'));
         $this->output->add_label('autocompletechars', 'autocompletemore');
     }
-
 
     /**
      * Returns supported font-family specifications
@@ -2008,7 +1970,6 @@
         return $fonts;
     }
 
-
     /**
      * Create a human readable string for a number of bytes
      *
@@ -2035,7 +1996,6 @@
 
         return $str;
     }
-
 
     /**
      * Returns real size (calculated) of the message part

--
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