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	diff --git a/lib/file_api.php b/lib/file_api.php
	index fcc0fa6..4bed082 100644
	--- a/lib/file_api.php
	+++ b/lib/file_api.php
	@@ -1,577 +1,588 @@
	<?php
	/*
	+--------------------------------------------------------------------------+
	\| This file is part of the Kolab File API \|
	\| \|
	\| Copyright (C) 2012-2013, Kolab Systems AG \|
	\| \|
	\| This program is free software: you can redistribute it and/or modify \|
	\| it under the terms of the GNU Affero General Public License as published \|
	\| by the Free Software Foundation, either version 3 of the License, or \|
	\| (at your option) any later version. \|
	\| \|
	\| This program is distributed in the hope that it will be useful, \|
	\| but WITHOUT ANY WARRANTY; without even the implied warranty of \|
	\| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \|
	\| GNU Affero General Public License for more details. \|
	\| \|
	\| You should have received a copy of the GNU Affero General Public License \|
	\| along with this program. If not, see <http://www.gnu.org/licenses/> \|
	+--------------------------------------------------------------------------+
	\| Author: Aleksander Machniak <machniak@kolabsys.com> \|
	+--------------------------------------------------------------------------+
	*/

	class file_api
	{
	const ERROR_CODE = 500;
	const OUTPUT_JSON = 'application/json';
	const OUTPUT_HTML = 'text/html';

	const PATH_SEPARATOR = '/';

	public $session;

	private $app_name = 'Kolab File API';
	private $api;
	private $conf;
	private $output_type = self::OUTPUT_JSON;
	private $config = array(
	'date_format' => 'Y-m-d H:i',
	'language' => 'en_US',
	);


	public function __construct()
	{
	$rcube = rcube::get_instance();
	$rcube->add_shutdown_function(array($this, 'shutdown'));
	$this->conf = $rcube->config;
	$this->session_init();
	}

	/**
	* Initialise backend class
	*/
	protected function api_init()
	{
	if ($this->api) {
	return;
	}

	// @TODO: config
	$driver = 'kolab';
	$class = $driver . '_file_storage';

	require_once $driver . '/' . $class . '.php';

	$this->api = new $class;
	}

	/**
	* Process the request and dispatch it to the requested service
	*/
	public function run()
	{
	$this->request = strtolower($_GET['method']);

	// Check the session, authenticate the user
	if (!$this->session_validate()) {
	$this->session->destroy(session_id());

	if ($this->request == 'authenticate') {
	$this->session->regenerate_id(false);

	if ($username = $this->authenticate()) {
	$_SESSION['user'] = $username;
	$_SESSION['time'] = time();
	$_SESSION['config'] = $this->config;

	$this->output_success(array(
	'token' => session_id(),
	'capabilities' => $this->capabilities(),
	));
	}
	}

	throw new Exception("Invalid session", 403);
	}

	// Call service method
	$result = $this->request_handler($this->request);

	// Send success response, errors should be handled by driver class
	// by throwing exceptions or sending output by itself
	$this->output_success($result);
	}

	/**
	* Session validation check and session start
	*/
	private function session_validate()
	{
	$sess_id = rcube_utils::request_header('X-Session-Token') ?: $_REQUEST['token'];

	if (empty($sess_id)) {
	session_start();
	return false;
	}

	session_id($sess_id);
	session_start();

	if (empty($_SESSION['user'])) {
	return false;
	}

	$timeout = $this->conf->get('session_lifetime', 0) * 60;
	if ($timeout && $_SESSION['time'] && $_SESSION['time'] < time() - $timeout) {
	return false;
	}
	// update session time
	$_SESSION['time'] = time();

	return true;
	}

	/**
	* Initializes session
	*/
	private function session_init()
	{
	$rcube = rcube::get_instance();
	$sess_name = $this->conf->get('session_name');
	$lifetime = $this->conf->get('session_lifetime', 0) * 60;

	if ($lifetime) {
	ini_set('session.gc_maxlifetime', $lifetime * 2);
	}

	ini_set('session.name', $sess_name ? $sess_name : 'file_api_sessid');
	ini_set('session.use_cookies', 0);
	ini_set('session.serialize_handler', 'php');

	// use database for storing session data
	$this->session = new rcube_session($rcube->get_dbh(), $this->conf);

	$this->session->register_gc_handler(array($rcube, 'temp_gc'));
	$this->session->register_gc_handler(array($rcube, 'cache_gc'));

	$this->session->set_secret($this->conf->get('des_key') . dirname($_SERVER['SCRIPT_NAME']));
	$this->session->set_ip_check($this->conf->get('ip_check'));
	}

	/**
	* Script shutdown handler
	*/
	public function shutdown()
	{
	session_write_close();

	// write performance stats to logs/console
	if ($this->conf->get('devel_mode')) {
	if (function_exists('memory_get_peak_usage'))
	$mem = memory_get_peak_usage();
	else if (function_exists('memory_get_usage'))
	$mem = memory_get_usage();

	$log = trim($this->request . ($mem ? sprintf(' [%.1f MB]', $mem/1024/1024) : ''));
	if (defined('FILE_API_START')) {
	rcube::print_timer(FILE_API_START, $log);
	}
	else {
	rcube::console($log);
	}
	}
	}

	/**
	* Authentication request handler (HTTP Auth)
	*/
	private function authenticate()
	{
	if (isset($_POST['username'])) {
	$username = $_POST['username'];
	$password = $_POST['password'];
	}
	else if (!empty($_SERVER['PHP_AUTH_USER'])) {
	$username = $_SERVER['PHP_AUTH_USER'];
	$password = $_SERVER['PHP_AUTH_PW'];
	}
	// when used with (f)cgi no PHP_AUTH* variables are available without defining a special rewrite rule
	else if (!isset($_SERVER['PHP_AUTH_USER'])) {
	// "Basic didhfiefdhfu4fjfjdsa34drsdfterrde..."
	if (isset($_SERVER["REMOTE_USER"])) {
	$basicAuthData = base64_decode(substr($_SERVER["REMOTE_USER"], 6));
	}
	else if (isset($_SERVER["REDIRECT_REMOTE_USER"])) {
	$basicAuthData = base64_decode(substr($_SERVER["REDIRECT_REMOTE_USER"], 6));
	}
	else if (isset($_SERVER["Authorization"])) {
	$basicAuthData = base64_decode(substr($_SERVER["Authorization"], 6));
	}
	else if (isset($_SERVER["HTTP_AUTHORIZATION"])) {
	$basicAuthData = base64_decode(substr($_SERVER["HTTP_AUTHORIZATION"], 6));
	}

	if (isset($basicAuthData) && !empty($basicAuthData)) {
	list($username, $password) = explode(":", $basicAuthData);
	}
	}

	if (!empty($username)) {
	$this->api_init();
	$result = $this->api->authenticate($username, $password);
	}

	if (empty($result)) {
	/*
	header('WWW-Authenticate: Basic realm="' . $this->app_name .'"');
	header('HTTP/1.1 401 Unauthorized');
	exit;
	*/
	throw new Exception("Invalid password or username", file_api::ERROR_CODE);
	}

	return $username;
	}

	/**
	* Storage/System method handler
	*/
	private function request_handler($request)
	{
	// handle "global" requests that don't require api driver
	switch ($request) {
	case 'ping':
	return array();

	case 'quit':
	- $this->session->kill();
	+ $this->session->destroy(session_id());
	return array();

	case 'configure':
	foreach (array_keys($this->config) as $name) {
	if (isset($_GET[$name])) {
	$this->config[$name] = $_GET[$name];
	}
	}
	$_SESSION['config'] = $this->config;

	return $this->config;

	case 'upload_progress':
	return $this->upload_progress();

	case 'capabilities':
	// this one actually uses api driver, but we put it here
	// because we'd need session for the api driver
	return $this->capabilities();
	}

	// init API driver
	$this->api_init();

	+ // GET arguments
	+ $args = &$_GET;
	+
	+ // POST arguments (JSON)
	+ if ($_SERVER['REQUEST_METHOD'] == 'POST') {
	+ $post = file_get_contents('php://input');
	+ $args += (array) json_decode($post, true);
	+ unset($post);
	+ }
	+
	+ // handle request
	switch ($request) {
	case 'file_list':
	- $params = array('reverse' => !empty($_GET['reverse']) && rcube_utils::get_boolean($_GET['reverse']));
	- if (!empty($_GET['sort'])) {
	- $params['sort'] = strtolower($_GET['sort']);
	+ $params = array('reverse' => !empty($args['reverse']) && rcube_utils::get_boolean($args['reverse']));
	+ if (!empty($args['sort'])) {
	+ $params['sort'] = strtolower($args['sort']);
	}

	- if (!empty($_GET['search'])) {
	- $params['search'] = $_GET['search'];
	+ if (!empty($args['search'])) {
	+ $params['search'] = $args['search'];
	if (!is_array($params['search'])) {
	$params['search'] = array('name' => $params['search']);
	}
	}

	- return $this->api->file_list($_GET['folder'], $params);
	+ return $this->api->file_list($args['folder'], $params);

	- case 'file_create':
	+ case 'file_upload':
	// for Opera upload frame response cannot be application/json
	$this->output_type = self::OUTPUT_HTML;

	- if (!isset($_GET['folder']) \|\| $_GET['folder'] === '') {
	+ if (!isset($args['folder']) \|\| $args['folder'] === '') {
	throw new Exception("Missing folder name", file_api::ERROR_CODE);
	}

	$uploads = $this->upload();
	$result = array();

	foreach ($uploads as $file) {
	- $this->api->file_create($_GET['folder'] . self::PATH_SEPARATOR . $file['name'], $file);
	+ $this->api->file_create($args['folder'] . self::PATH_SEPARATOR . $file['name'], $file);
	unset($file['path']);
	$result[$file['name']] = array(
	'type' => $file['type'],
	'size' => $file['size'],
	);
	}

	return $result;

	case 'file_delete':
	- $files = (array) $_GET['file'];
	+ $files = (array) $args['file'];

	if (empty($files)) {
	throw new Exception("Missing file name", file_api::ERROR_CODE);
	}

	foreach ($files as $file) {
	$this->api->file_delete($file);
	}
	return;

	case 'file_info':
	- if (!isset($_GET['file']) \|\| $_GET['file'] === '') {
	+ if (!isset($args['file']) \|\| $args['file'] === '') {
	throw new Exception("Missing file name", file_api::ERROR_CODE);
	}

	- return $this->api->file_info($_GET['file']);
	+ return $this->api->file_info($args['file']);

	case 'file_get':
	$this->output_type = self::OUTPUT_HTML;

	- if (!isset($_GET['file']) \|\| $_GET['file'] === '') {
	+ if (!isset($args['file']) \|\| $args['file'] === '') {
	header("HTTP/1.0 ".file_api::ERROR_CODE." Missing file name");
	}

	$params = array(
	- 'force-download' => !empty($_GET['force-download']) && rcube_utils::get_boolean($_GET['force-download']),
	- 'force-type' => $_GET['force-type'],
	+ 'force-download' => !empty($args['force-download']) && rcube_utils::get_boolean($args['force-download']),
	+ 'force-type' => $args['force-type'],
	);

	try {
	- $this->api->file_get($_GET['file'], $params);
	+ $this->api->file_get($args['file'], $params);
	}
	catch (Exception $e) {
	header("HTTP/1.0 " . file_api::ERROR_CODE . " " . $e->getMessage());
	}
	exit;

	case 'file_move':
	case 'file_copy':
	- if (!isset($_GET['file']) \|\| $_GET['file'] === '') {
	+ if (!isset($args['file']) \|\| $args['file'] === '') {
	throw new Exception("Missing file name", file_api::ERROR_CODE);
	}

	- if (is_array($_GET['file'])) {
	- if (empty($_GET['file'])) {
	+ if (is_array($args['file'])) {
	+ if (empty($args['file'])) {
	throw new Exception("Missing file name", file_api::ERROR_CODE);
	}
	}
	else {
	- if (!isset($_GET['new']) \|\| $_GET['new'] === '') {
	+ if (!isset($args['new']) \|\| $args['new'] === '') {
	throw new Exception("Missing new file name", file_api::ERROR_CODE);
	}
	- $_GET['file'] = array($_GET['file'] => $_GET['new']);
	+ $args['file'] = array($args['file'] => $args['new']);
	}

	- $overwrite = !empty($_GET['overwrite']) && rcube_utils::get_boolean($_GET['overwrite']);
	- $files = (array) $_GET['file'];
	+ $overwrite = !empty($args['overwrite']) && rcube_utils::get_boolean($args['overwrite']);
	+ $files = (array) $args['file'];
	$errors = array();

	foreach ($files as $file => $new_file) {
	if ($new_file === '') {
	throw new Exception("Missing new file name", file_api::ERROR_CODE);
	}
	if ($new_file === $file) {
	throw new Exception("Old and new file name is the same", file_api::ERROR_CODE);
	}

	try {
	$this->api->{$request}($file, $new_file);
	}
	catch (Exception $e) {
	if ($e->getCode() == file_storage::ERROR_FILE_EXISTS) {
	// delete existing file and do copy/move again
	if ($overwrite) {
	$this->api->file_delete($new_file);
	$this->api->{$request}($file, $new_file);
	}
	// collect file-exists errors, so the client can ask a user
	// what to do and skip or replace file(s)
	else {
	$errors[] = array(
	'src' => $file,
	'dst' => $new_file,
	);
	}
	}
	else {
	throw $e;
	}
	}
	}

	if (!empty($errors)) {
	return array('already_exist' => $errors);
	}

	return;

	case 'folder_create':
	- if (!isset($_GET['folder']) \|\| $_GET['folder'] === '') {
	+ if (!isset($args['folder']) \|\| $args['folder'] === '') {
	throw new Exception("Missing folder name", file_api::ERROR_CODE);
	}
	- return $this->api->folder_create($_GET['folder']);
	+ return $this->api->folder_create($args['folder']);

	case 'folder_delete':
	- if (!isset($_GET['folder']) \|\| $_GET['folder'] === '') {
	+ if (!isset($args['folder']) \|\| $args['folder'] === '') {
	throw new Exception("Missing folder name", file_api::ERROR_CODE);
	}
	- return $this->api->folder_delete($_GET['folder']);
	+ return $this->api->folder_delete($args['folder']);

	case 'folder_rename':
	- if (!isset($_GET['folder']) \|\| $_GET['folder'] === '') {
	+ if (!isset($args['folder']) \|\| $args['folder'] === '') {
	throw new Exception("Missing source folder name", file_api::ERROR_CODE);
	}
	- if (!isset($_GET['new']) \|\| $_GET['new'] === '') {
	+ if (!isset($args['new']) \|\| $args['new'] === '') {
	throw new Exception("Missing destination folder name", file_api::ERROR_CODE);
	}
	- if ($_GET['new'] === $_GET['folder']) {
	+ if ($args['new'] === $args['folder']) {
	return;
	}
	- return $this->api->folder_rename($_GET['folder'], $_GET['new']);
	+ return $this->api->folder_rename($args['folder'], $args['new']);

	case 'folder_list':
	return $this->api->folder_list();
	}

	if ($request) {
	throw new Exception("Unknown method", 501);
	}
	}

	/**
	* File uploads handler
	*/
	protected function upload()
	{
	$files = array();

	if (is_array($_FILES['file']['tmp_name'])) {
	foreach ($_FILES['file']['tmp_name'] as $i => $filepath) {
	if ($err = $_FILES['file']['error'][$i]) {
	if ($err == UPLOAD_ERR_INI_SIZE \|\| $err == UPLOAD_ERR_FORM_SIZE) {
	throw new Exception("Maximum file size exceeded", file_api::ERROR_CODE);
	}
	throw new Exception("File upload failed", file_api::ERROR_CODE);
	}

	$files[] = array(
	'path' => $filepath,
	'name' => $_FILES['file']['name'][$i],
	'size' => filesize($filepath),
	'type' => rcube_mime::file_content_type($filepath, $_FILES['file']['name'][$i], $_FILES['file']['type']),
	);
	}
	}
	else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
	throw new Exception("File upload failed", file_api::ERROR_CODE);
	}

	return $files;
	}

	/**
	* File upload progress handler
	*/
	protected function upload_progress()
	{
	if (function_exists('apc_fetch')) {
	$prefix = ini_get('apc.rfc1867_prefix');
	$uploadid = rcube_utils::get_input_value('id', rcube_utils::INPUT_GET);
	$status = apc_fetch($prefix . $uploadid);

	if (!empty($status)) {
	$status['percent'] = round($status['current']/$status['total']*100);
	if ($status['percent'] < 100) {
	$diff = time() - intval($status['start_time']);
	// calculate time to end of uploading (in seconds)
	$status['left'] = intval($diff * (100 - $status['percent']) / $status['percent']);
	// average speed (bytes per second)
	$status['rate'] = intval($status['current'] / $diff);
	}
	}

	$status['id'] = $uploadid;

	return $status; // id, done, total, current, percent, start_time, left, rate
	}

	throw new Exception("Not supported", file_api::ERROR_CODE);
	}

	/*
	* Returns storage (driver) capabilities
	*/
	protected function capabilities()
	{
	$this->api_init();

	$caps = array();

	// check support for upload progress
	if (($progress_sec = $this->conf->get('upload_progress'))
	&& ini_get('apc.rfc1867') && function_exists('apc_fetch')
	) {
	$caps[file_storage::CAPS_PROGRESS_NAME] = ini_get('apc.rfc1867_name');
	$caps[file_storage::CAPS_PROGRESS_TIME] = $progress_sec;
	}

	foreach ($this->api->capabilities() as $name => $value) {
	// skip disabled capabilities
	if ($value !== false) {
	$caps[$name] = $value;
	}
	}

	return $caps;
	}

	/**
	* Send success response
	*
	* @param mixed $data Data
	*/
	public function output_success($data)
	{
	if (!is_array($data)) {
	$data = array();
	}

	$this->output_send(array('status' => 'OK', 'result' => $data));
	}

	/**
	* Send error response
	*
	* @param mixed $data Data
	*/
	public function output_error($errdata, $code = null)
	{
	if (is_string($errdata)) {
	$errdata = array('reason' => $errdata);
	}

	if (!$code) {
	$code = file_api::ERROR_CODE;
	}

	$this->output_send(array('status' => 'ERROR', 'code' => $code) + $errdata);
	}

	/**
	* Send response
	*
	* @param mixed $data Data
	*/
	protected function output_send($data)
	{
	// Send response
	header("Content-Type: {$this->output_type}; charset=utf-8");
	echo json_encode($data);
	exit;
	}
	}
	diff --git a/public_html/js/files_api.js b/public_html/js/files_api.js
	index e04e3aa..a30d243 100644
	--- a/public_html/js/files_api.js
	+++ b/public_html/js/files_api.js
	@@ -1,535 +1,543 @@
	/*
	+--------------------------------------------------------------------------+
	\| This file is part of the Kolab File API \|
	\| \|
	\| Copyright (C) 2012-2013, Kolab Systems AG \|
	\| \|
	\| This program is free software: you can redistribute it and/or modify \|
	\| it under the terms of the GNU Affero General Public License as published \|
	\| by the Free Software Foundation, either version 3 of the License, or \|
	\| (at your option) any later version. \|
	\| \|
	\| This program is distributed in the hope that it will be useful, \|
	\| but WITHOUT ANY WARRANTY; without even the implied warranty of \|
	\| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \|
	\| GNU Affero General Public License for more details. \|
	\| \|
	\| You should have received a copy of the GNU Affero General Public License \|
	\| along with this program. If not, see <http://www.gnu.org/licenses/> \|
	+--------------------------------------------------------------------------+
	\| Author: Aleksander Machniak <machniak@kolabsys.com> \|
	+--------------------------------------------------------------------------+
	*/

	function files_api()
	{
	var ref = this;

	// default config
	this.translations = {};
	this.env = {
	url: 'api/',
	directory_separator: '/'
	};


	/*********************************************************/
	/******* Basic utilities *******/
	/*********************************************************/

	// set environment variable(s)
	this.set_env = function(p, value)
	{
	if (p != null && typeof p === 'object' && !value)
	for (var n in p)
	this.env[n] = p[n];
	else
	this.env[p] = value;
	};

	// add a localized label(s) to the client environment
	this.tdef = function(p, value)
	{
	if (typeof p == 'string')
	this.translations[p] = value;
	else if (typeof p == 'object')
	$.extend(this.translations, p);
	};

	// return a localized string
	this.t = function(label)
	{
	if (this.translations[label])
	return this.translations[label];
	else
	return label;
	};

	// print a message into browser console
	this.log = function(msg)
	{
	if (window.console && console.log)
	console.log(msg);
	};

	/********************************************************/
	/******* Remote request methods *******/
	/********************************************************/

	// send a http POST request to the API service
	- this.post = function(action, postdata, func)
	+ this.post = function(action, data, func)
	{
	- var url = this.env.url + action;
	+ var url = this.env.url + '?method=' + action;

	if (!func) func = 'response';

	this.set_request_time();

	return $.ajax({
	- type: 'POST', url: url, data: postdata, dataType: 'json',
	+ type: 'POST', url: url, data: JSON.stringify(data), dataType: 'json',
	contentType: 'application/json; charset=utf-8',
	success: function(response) { ref[func](response); },
	error: function(o, status, err) { ref.http_error(o, status, err); },
	cache: false,
	beforeSend: function(xmlhttp) { xmlhttp.setRequestHeader('X-Session-Token', ref.env.token); }
	});
	};

	// send a http GET request to the API service
	this.get = function(action, data, func)
	{
	var url = this.env.url;

	if (!func) func = 'response';

	this.set_request_time();
	data.method = action;

	return $.ajax({
	type: 'GET', url: url, data: data,
	success: function(response) { ref[func](response); },
	error: function(o, status, err) { ref.http_error(o, status, err); },
	cache: false,
	beforeSend: function(xmlhttp) { xmlhttp.setRequestHeader('X-Session-Token', ref.env.token); }
	});
	};

	+ // send request with auto-selection of POST/GET method
	+ this.request = function(action, data, func)
	+ {
	+ // Use POST for modification actions with probable big request size
	+ var method = /(create\|delete\|move\|copy\|rename)/.test(action) ? 'post' : 'get';
	+ this[method](action, data, func);
	+ };
	+
	// handle HTTP request errors
	this.http_error = function(request, status, err)
	{
	var errmsg = request.statusText;

	this.set_busy(false);
	request.abort();

	if (request.status && errmsg)
	this.display_message(this.t('servererror') + ' (' + errmsg + ')', 'error');
	};

	this.response = function(response)
	{
	this.update_request_time();
	this.set_busy(false);

	return this.response_parse(response);
	};

	this.response_parse = function(response)
	{
	if (!response \|\| response.status != 'OK') {
	// Logout on invalid-session error
	if (response && response.code == 403)
	this.logout(response);
	else
	this.display_message(response && response.reason ? response.reason : this.t('servererror'), 'error');

	return false;
	}

	return true;
	};


	/*********************************************************/
	/******* Utilities *******/
	/*********************************************************/

	// Called on "session expired" session
	this.logout = function(response) {};

	// set state
	this.set_busy = function(a, message) {};

	// displays error message
	this.display_message = function(label) {};

	// called when a request timed out
	this.request_timed_out = function() {};

	// called on start of the request
	this.set_request_time = function() {};

	// called on request response
	this.update_request_time = function() {};


	/*********************************************************/
	/******* Helpers *******/
	/*********************************************************/

	// compose a valid url with the given parameters
	this.url = function(action, query)
	{
	var k, param = {},
	querystring = typeof query === 'string' ? '&' + query : '';

	if (typeof action !== 'string')
	query = action;
	else if (!query \|\| typeof query !== 'object')
	query = {};

	// overwrite task name
	if (action)
	query.method = action;

	// remove undefined values
	for (k in query) {
	if (query[k] !== undefined && query[k] !== null)
	param[k] = query[k];
	}

	return '?' + $.param(param) + querystring;
	};

	// Folder list parser, converts it into structure
	this.folder_list_parse = function(list)
	{
	var i, n, items, items_len, f, tmp, folder, num = 1,
	len = list.length, folders = {};

	for (i=0; i<len; i++) {
	folder = list[i];
	items = folder.split(this.env.directory_separator);
	items_len = items.length;

	for (n=0; n<items_len-1; n++) {
	tmp = items.slice(0,n+1);
	f = tmp.join(this.env.directory_separator);
	if (!folders[f])
	folders[f] = {name: tmp.pop(), depth: n, id: 'f'+num++, virtual: 1};
	}

	folders[folder] = {name: items.pop(), depth: items_len-1, id: 'f'+num++};
	}

	return folders;
	};

	// folder structure presentation (structure icons)
	this.folder_list_tree = function(folders)
	{
	var i, n, diff, tree = [], folder;

	for (i in folders) {
	items = i.split(this.env.directory_separator);
	items_len = items.length;

	// skip root
	if (items_len < 2) {
	tree = [];
	continue;
	}

	folders[i].tree = [1];

	for (n=0; n<tree.length; n++) {
	folder = tree[n];
	diff = folders[folder].depth - (items_len - 1);
	if (diff >= 0)
	folders[folder].tree[diff] = folders[folder].tree[diff] ? folders[folder].tree[diff] + 2 : 2;
	}

	tree.push(i);
	}

	for (i in folders) {
	if (tree = folders[i].tree) {
	var html = '', divs = [];
	for (n=0; n<folders[i].depth; n++) {
	if (tree[n] > 2)
	divs.push({'class': 'l3', width: 15});
	else if (tree[n] > 1)
	divs.push({'class': 'l2', width: 15});
	else if (tree[n] > 0)
	divs.push({'class': 'l1', width: 15});
	// separator
	else if (divs.length && !divs[divs.length-1]['class'])
	divs[divs.length-1].width += 15;
	else
	divs.push({'class': null, width: 15});
	}

	for (n=divs.length-1; n>=0; n--) {
	if (divs[n]['class'])
	html += '<span class="tree '+divs[n]['class']+'" />';
	else
	html += '<span style="width:'+divs[n].width+'px" />';
	}

	if (html)
	$('#' + folders[i].id + ' span.branch').html(html);
	}
	}
	};

	// convert content-type string into class name
	this.file_type_class = function(type)
	{
	if (!type)
	return '';

	type = type.replace(/[^a-z0-9]/g, '_');

	return type;
	};

	// convert bytes into number with size unit
	this.file_size = function(size)
	{
	if (size >= 1073741824)
	return parseFloat(size/1073741824).toFixed(2) + ' GB';
	if (size >= 1048576)
	return parseFloat(size/1048576).toFixed(2) + ' MB';
	if (size >= 1024)
	return parseInt(size/1024) + ' kB';

	return parseInt(size \|\| 0) + ' B';
	};

	// Extract file name from full path
	this.file_name = function(path)
	{
	var path = path.split(this.env.directory_separator);
	return path.pop();
	};

	// Extract file path from full path
	this.file_path = function(path)
	{
	var path = path.split(this.env.directory_separator);
	path.pop();
	return path.join(this.env.directory_separator);
	};

	// compare two sortable objects
	this.sort_compare = function(data1, data2)
	{
	var key = this.env.sort_col \|\| 'name';

	if (key == 'mtime')
	key = 'modified';

	data1 = data1[key];
	data2 = data2[key];

	if (key == 'size' \|\| key == 'modified')
	// numeric comparison
	return this.env.sort_reverse ? data2 - data1 : data1 - data2;
	else {
	// use Array.sort() for sting comparison
	var arr = [data1, data2];
	arr.sort(function (a, b) {
	// @TODO: use localeCompare() arguments for better results
	return a.localeCompare(b);
	});

	if (this.env.sort_reverse)
	arr.reverse();

	return arr[0] === data2 ? 1 : -1;
	}
	};

	// Checks if specified mimetype is supported natively by the browser (return 1)
	// or can be displayed in the browser using File API viewer (return 2)
	this.file_type_supported = function(type)
	{
	var i, t, img = 'jpg\|jpeg\|gif\|bmp\|png',
	regexps = [
	/^text\/(?!(pdf\|x-pdf))/i,
	/^message\/rfc822/i,
	];

	if (this.env.browser_capabilities.tif)
	img += '\|tiff';

	if ((new RegExp('^image/(' + img + ')$', 'i')).test(type))
	return 1;

	// prefer text viewer
	for (i in regexps)
	if (regexps[i].test(type))
	return 2;

	if (this.env.browser_capabilities.pdf) {
	regexps.push(/^application\/(pdf\|x-pdf\|acrobat\|vnd.pdf)/i);
	regexps.push(/^text\/(pdf\|x-pdf)/i);
	}

	if (this.env.browser_capabilities.flash)
	regexps.push(/^application\/x-shockwave-flash/i);

	for (i in regexps)
	if (regexps[i].test(type))
	return 1;

	for (i in navigator.mimeTypes) {
	t = navigator.mimeTypes[i].type;
	if (t == type && navigator.mimeTypes[i].enabledPlugin)
	return 1;
	}

	// types with viewer support
	if ($.inArray(type, this.env.supported_mimetypes) > -1)
	return 2;
	};

	// Return browser capabilities
	this.browser_capabilities = function()
	{
	var i, caps = [], ctypes = ['pdf', 'flash', 'tif'];

	for (i in ctypes)
	if (this.env.browser_capabilities[ctypes[i]])
	caps.push(ctypes[i]);

	return caps;
	};

	// Checks browser capabilities eg. PDF support, TIF support
	this.browser_capabilities_check = function()
	{
	if (!this.env.browser_capabilities)
	this.env.browser_capabilities = {};

	if (this.env.browser_capabilities.pdf === undefined)
	this.env.browser_capabilities.pdf = this.pdf_support_check();

	if (this.env.browser_capabilities.flash === undefined)
	this.env.browser_capabilities.flash = this.flash_support_check();

	if (this.env.browser_capabilities.tif === undefined)
	this.tif_support_check();
	};

	this.tif_support_check = function()
	{
	var img = new Image(), ref = this;

	img.onload = function() { ref.env.browser_capabilities.tif = 1; };
	img.onerror = function() { ref.env.browser_capabilities.tif = 0; };
	img.src = 'resources/blank.tif';
	};

	this.pdf_support_check = function()
	{
	var plugin = navigator.mimeTypes ? navigator.mimeTypes["application/pdf"] : {},
	plugins = navigator.plugins,
	len = plugins.length,
	regex = /Adobe Reader\|PDF\|Acrobat/i,
	ref = this;

	if (plugin && plugin.enabledPlugin)
	return 1;

	if (window.ActiveXObject) {
	try {
	if (axObj = new ActiveXObject("AcroPDF.PDF"))
	return 1;
	}
	catch (e) {}
	try {
	if (axObj = new ActiveXObject("PDF.PdfCtrl"))
	return 1;
	}
	catch (e) {}
	}

	for (i=0; i<len; i++) {
	plugin = plugins[i];
	if (typeof plugin === 'String') {
	if (regex.test(plugin))
	return 1;
	}
	else if (plugin.name && regex.test(plugin.name))
	return 1;
	}

	var obj = document.createElement('OBJECT');
	obj.onload = function() { ref.env.browser_capabilities.pdf = 1; };
	obj.onerror = function() { ref.env.browser_capabilities.pdf = 0; };
	obj.style.display = 'none';
	obj.type = 'application/pdf';
	obj.data = 'resources/blank.pdf';
	document.body.appendChild(obj);

	return 0;
	};

	this.flash_support_check = function()
	{
	var plugin = navigator.mimeTypes ? navigator.mimeTypes["application/x-shockwave-flash"] : {};

	if (plugin && plugin.enabledPlugin)
	return 1;

	if (window.ActiveXObject) {
	try {
	if (axObj = new ActiveXObject("ShockwaveFlash.ShockwaveFlash"))
	return 1;
	}
	catch (e) {}
	}

	return 0;
	};

	};

	// Add escape() method to RegExp object
	// http://dev.rubyonrails.org/changeset/7271
	RegExp.escape = function(str)
	{
	return String(str).replace(/([.*+?^=!:${}()\|[\]\/\\])/g, '\\$1');
	};

	// make a string URL safe (and compatible with PHP's rawurlencode())
	function urlencode(str)
	{
	if (window.encodeURIComponent)
	return encodeURIComponent(str).replace('*', '%2A');

	return escape(str)
	.replace('+', '%2B')
	.replace('*', '%2A')
	.replace('/', '%2F')
	.replace('@', '%40');
	};

	function escapeHTML(str)
	{
	return str === undefined ? '' : String(str)
	.replace(/&/g, '&')
	.replace(/>/g, '>')
	.replace(/</g, '<');
	};

	function object_is_empty(obj)
	{
	if (obj)
	for (var i in obj)
	if (i !== null)
	return true;

	return false;
	}
	diff --git a/public_html/js/files_ui.js b/public_html/js/files_ui.js
	index 75b37a8..cc35db2 100644
	--- a/public_html/js/files_ui.js
	+++ b/public_html/js/files_ui.js
	@@ -1,1645 +1,1645 @@
	/*
	+--------------------------------------------------------------------------+
	\| This file is part of the Kolab File API \|
	\| \|
	\| Copyright (C) 2012-2013, Kolab Systems AG \|
	\| \|
	\| This program is free software: you can redistribute it and/or modify \|
	\| it under the terms of the GNU Affero General Public License as published \|
	\| by the Free Software Foundation, either version 3 of the License, or \|
	\| (at your option) any later version. \|
	\| \|
	\| This program is distributed in the hope that it will be useful, \|
	\| but WITHOUT ANY WARRANTY; without even the implied warranty of \|
	\| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \|
	\| GNU Affero General Public License for more details. \|
	\| \|
	\| You should have received a copy of the GNU Affero General Public License \|
	\| along with this program. If not, see <http://www.gnu.org/licenses/> \|
	+--------------------------------------------------------------------------+
	\| Author: Aleksander Machniak <machniak@kolabsys.com> \|
	+--------------------------------------------------------------------------+
	*/

	function files_ui()
	{
	var ref = this;

	this.request_timeout = 300;
	this.message_time = 3000;
	this.events = {};
	this.commands = {};
	this.uploads = {};
	this.ie = document.all && !window.opera;
	this.env = {
	url: 'api/',
	sort_col: 'name',
	sort_reverse: 0,
	search_threads: 1,
	directory_separator: '/'
	};

	// set jQuery ajax options
	$.ajaxSetup({
	cache: false,
	error: function(request, status, err) { ref.http_error(request, status, err); },
	beforeSend: function(xmlhttp) { xmlhttp.setRequestHeader('X-Session-Token', ref.env.token); }
	});


	/*********************************************************/
	/******* basic utilities *******/
	/*********************************************************/

	// initialize interface
	this.init = function()
	{
	if (!this.env.token)
	return;

	if (this.env.task == 'main') {
	this.enable_command('folder.list', 'folder.create', 'file.search', true);
	this.command('folder.list');
	}
	else if (this.env.task == 'file') {
	this.load_file('#file-content', this.env.filedata);
	this.enable_command('file.delete', 'file.download', true);
	}

	if (!this.env.browser_capabilities)
	this.browser_capabilities_check();
	};

	// set environment variable(s)
	this.set_env = function(p, value)
	{
	if (p != null && typeof p === 'object' && !value)
	for (var n in p)
	this.env[n] = p[n];
	else
	this.env[p] = value;
	};

	// execute a specific command on the web client
	this.command = function(command, props, obj)
	{
	if (obj && obj.blur)
	obj.blur();

	if (this.busy)
	return false;

	if (!this.commands[command])
	return;

	var ret = undefined,
	func = command.replace(/[^a-z]/g, '_'),
	task = command.replace(/\.[a-z-_]+$/g, '');

	if (this[func] && typeof this[func] === 'function') {
	ret = this[func](props);
	}

	return ret === false ? false : obj ? false : true;
	};

	this.set_busy = function(a, message)
	{
	if (a && this.busy)
	return;

	if (a && message) {
	var msg = this.t(message);
	if (msg == message)
	msg = 'Loading...';

	this.display_message(msg, 'loading');
	}
	else if (!a) {
	this.hide_message('loading');
	}

	this.busy = a;

	// if (this.gui_objects.editform)
	// this.lock_form(this.gui_objects.editform, a);

	// clear pending timer
	if (this.request_timer)
	clearTimeout(this.request_timer);

	// set timer for requests
	if (a && this.request_timeout)
	this.request_timer = window.setTimeout(function() { ref.request_timed_out(); }, this.request_timeout * 1000);
	};

	// called when a request timed out
	this.request_timed_out = function()
	{
	this.set_busy(false);
	this.display_message('Request timed out!', 'error');
	};

	// Add variable to GET string, replace old value if exists
	this.add_url = function(url, name, value)
	{
	value = urlencode(value);

	if (/(\?.*)$/.test(url)) {
	var urldata = RegExp.$1,
	datax = RegExp('((\\?\|&)'+RegExp.escape(name)+'=[^&]*)');

	if (datax.test(urldata))
	urldata = urldata.replace(datax, RegExp.$2 + name + '=' + value);
	else
	urldata += '&' + name + '=' + value

	return url.replace(/(\?.*)$/, urldata);
	}

	return url + '?' + name + '=' + value;
	};

	this.trigger_event = function(event, data)
	{
	if (this.events[event])
	for (var i in this.events[event])
	this.events[event][i](data);
	};

	this.add_event_listener = function(event, func)
	{
	if (!this.events[event])
	this.events[event] = [];

	this.events[event].push(func);
	};

	this.buttons = function(p)
	{
	$.each(p, function(i, v) {
	if (!ui.buttons[i])
	ui.buttons[i] = [];

	if (typeof v == 'object')
	ui.buttons[i] = $.merge(ui.buttons[i], v);
	else
	ui.buttons[i].push(v);
	});
	};

	this.enable_command = function()
	{
	var i, n, args = Array.prototype.slice.call(arguments),
	enable = args.pop(), cmd;

	for (n=0; n<args.length; n++) {
	cmd = args[n];
	// argument of type array
	if (typeof cmd === 'string') {
	this.commands[cmd] = enable;
	if (this.buttons[cmd])
	$.each(this.buttons[cmd], function (i, button) {
	$('#'+button)[enable ? 'removeClass' : 'addClass']('disabled');
	});
	}
	// push array elements into commands array
	else {
	for (i in cmd)
	args.push(cmd[i]);
	}
	}
	};


	/*********************************************************/
	/******* GUI functionality *******/
	/*********************************************************/

	// write to the document/window title
	this.set_pagetitle = function(title)
	{
	if (title && document.title)
	document.title = title;
	};

	// display a system message (types: loading, notice, error)
	this.display_message = function(msg, type, timeout)
	{
	var obj, ref = this;

	if (!type)
	type = 'notice';
	if (msg)
	msg = this.t(msg);

	if (type == 'loading') {
	timeout = this.request_timeout * 1000;
	if (!msg)
	msg = this.t('loading');
	}
	else if (!timeout)
	timeout = this.message_time * (type == 'error' \|\| type == 'warning' ? 2 : 1);

	obj = $('<div>');

	if (type != 'loading') {
	msg = '<div><span>' + msg + '</span></div>';
	obj.addClass(type).click(function() { return ref.hide_message(); });
	}

	if (timeout > 0)
	window.setTimeout(function() { ref.hide_message(type, type != 'loading'); }, timeout);

	obj.attr('id', type == 'loading' ? 'loading' : 'message')
	.appendTo('body').html(msg).show();
	};

	// make a message to disapear
	this.hide_message = function(type, fade)
	{
	if (type == 'loading')
	$('#loading').remove();
	else
	$('#message').fadeOut('normal', function() { $(this).remove(); });
	};

	this.set_watermark = function(id)
	{
	if (this.env.watermark)
	$('#'+id).html(this.env.watermark);
	};


	/********************************************************/
	/******* Remote request methods *******/
	/********************************************************/

	// send a http POST request to the server
	this.http_post = function(action, postdata)
	{
	var url = this.url(action);

	if (postdata && typeof postdata === 'object')
	postdata.remote = 1;
	else {
	if (!postdata)
	postdata = '';
	postdata += '&remote=1';
	}

	this.set_request_time();

	return $.ajax({
	type: 'POST', url: url, data: postdata, dataType: 'json',
	success: function(response) { ui.http_response(response); },
	error: function(o, status, err) { ui.http_error(o, status, err); }
	});
	};

	// handle HTTP response
	this.http_response = function(response)
	{
	var i;

	if (!response)
	return;

	// set env vars
	if (response.env)
	this.set_env(response.env);

	// we have translation labels to add
	if (typeof response.labels === 'object')
	this.tdef(response.labels);

	// HTML page elements
	if (response.objects)
	for (i in response.objects)
	$('#'+i).html(response.objects[i]);

	this.update_request_time();
	this.set_busy(false);

	// if we get javascript code from server -> execute it
	if (response.exec)
	eval(response.exec);

	this.trigger_event('http-response', response);
	};

	// handle HTTP request errors
	this.http_error = function(request, status, err)
	{
	var errmsg = request.statusText;

	this.set_busy(false);
	request.abort();

	if (request.status && errmsg)
	this.display_message(this.t('servererror') + ' (' + errmsg + ')', 'error');
	};


	/********************************************************/
	/******* Helper methods *******/
	/********************************************************/

	// disable/enable all fields of a form
	this.lock_form = function(form, lock)
	{
	if (!form \|\| !form.elements)
	return;

	var n, len, elm;

	if (lock)
	this.disabled_form_elements = [];

	for (n=0, len=form.elements.length; n<len; n++) {
	elm = form.elements[n];

	if (elm.type == 'hidden')
	continue;
	// remember which elem was disabled before lock
	if (lock && elm.disabled)
	this.disabled_form_elements.push(elm);
	// check this.disabled_form_elements before inArray() as a workaround for FF5 bug
	// http://bugs.jquery.com/ticket/9873
	else if (lock \|\| (this.disabled_form_elements && $.inArray(elm, this.disabled_form_elements)<0))
	elm.disabled = lock;
	}
	};

	this.set_request_time = function()
	{
	this.env.request_time = (new Date()).getTime();
	};

	// Update request time element
	this.update_request_time = function()
	{
	if (this.env.request_time) {
	var t = ((new Date()).getTime() - this.env.request_time)/1000,
	el = $('#reqtime');
	el.text(el.text().replace(/[0-9.,]+/, t));
	}
	};

	// position and display popup
	this.popup_show = function(e, popup)
	{
	var popup = $(popup),
	pos = this.mouse_pos(e),
	win = $(window),
	w = popup.width(),
	h = popup.height(),
	left = pos.left - w + 20,
	top = pos.top - 10;

	if (top + h > win.height())
	top -= h;
	if (left + w > win.width())
	left -= w;

	popup.css({left: left + 'px', top: top + 'px'})
	.click(function(e) { e.stopPropagation(); $(this).hide(); }).show();
	e.stopPropagation();
	};

	// Return absolute mouse position of an event
	this.mouse_pos = function(e)
	{
	if (!e) e = window.event;

	var mX = e.pageX ? e.pageX : e.clientX,
	mY = e.pageY ? e.pageY : e.clientY;

	if (document.body && document.all) {
	mX += document.body.scrollLeft;
	mY += document.body.scrollTop;
	}

	if (e._offset) {
	mX += e._offset.left;
	mY += e._offset.top;
	}

	return {left:mX, top:mY};
	};

	this.serialize_form = function(id)
	{
	var i, v, json = {},
	form = $(id),
	query = form.serializeArray();

	for (i in query)
	json[query[i].name] = query[i].value;

	// serializeArray() doesn't work properly for multi-select
	$('select[multiple="multiple"]', form).each(function() {
	var name = this.name;
	json[name] = [];
	$(':selected', this).each(function() {
	json[name].push(this.value);
	});
	});

	return json;
	};


	/*********************************************************/
	/******* Commands and response handlers *******/
	/*********************************************************/

	this.logout = function()
	{
	this.main_logout();
	};

	this.main_logout = function(params)
	{
	location.href = '?task=main&action=logout' + (params ? '&' + $.param(params) : '');
	return false;
	};

	// folder list request
	this.folder_list = function()
	{
	this.set_busy(true, 'loading');
	- this.get('folder_list', {}, 'folder_list_response');
	+ this.request('folder_list', {}, 'folder_list_response');
	};

	// folder list response handler
	this.folder_list_response = function(response)
	{
	if (!this.response(response))
	return;

	var elem = $('#folderlist'), table = $('table', elem);

	this.env.folders = this.folder_list_parse(response.result);

	table.empty();

	$.each(this.env.folders, function(i, f) {
	var row = ui.folder_list_row(i, f);
	table.append(row);
	});

	// add virtual collections
	$.each(['audio', 'video', 'image', 'document'], function(i, n) {
	var row = $('<tr><td><span class="name"></span></td></tr>'),
	span = $('span.name', row);

	row.attr('id', 'folder-collection-' + n);
	span.text(ui.t('collection.' + n))
	.click(function() { ui.folder_select(n, true); });

	if (n == ui.env.collection)
	row.addClass('selected');

	table.append(row);
	});

	// add tree icons
	this.folder_list_tree(this.env.folders);
	};

	this.folder_select = function(folder, is_collection)
	{
	this.env.search = null;
	this.file_search_stop();

	var list = $('#folderlist');
	$('tr.selected', list).removeClass('selected');

	if (is_collection) {
	var found = $('#folder-collection-' + folder, list).addClass('selected');

	this.env.folder = null;
	this.enable_command('file.list', true);
	this.enable_command('folder.delete', 'folder.edit', 'file.upload', false);
	this.command('file.list', {collection: folder});
	}
	else {
	var found = $('#' + this.env.folders[folder].id, list).addClass('selected');

	this.env.collection = null;
	this.enable_command('file.list', 'folder.delete', 'folder.edit', 'file.upload', found.length);
	this.command('file.list', {folder: folder});
	}
	};

	this.folder_unselect = function()
	{
	this.env.search = null;
	this.env.folder = null;
	this.env.collection = null;
	this.file_search_stop();

	var list = $('#folderlist');
	$('tr.selected', list).removeClass('selected');

	this.enable_command('file.list', 'folder.delete', 'folder.edit', 'file.upload', false);
	};

	// folder create request
	this.folder_create = function(folder)
	{
	if (!folder) {
	this.folder_create_start();
	return;
	}

	this.set_busy(true, 'saving');
	- this.get('folder_create', {folder: folder}, 'folder_create_response');
	+ this.request('folder_create', {folder: folder}, 'folder_create_response');
	};

	// folder create response handler
	this.folder_create_response = function(response)
	{
	if (!this.response(response))
	return;

	this.folder_list();
	};

	// folder edit (rename) request
	this.folder_edit = function(folder)
	{
	if (!folder) {
	this.folder_edit_start();
	return;
	}

	this.set_busy(true, 'saving');
	- this.get('folder_rename', {folder: folder.folder, 'new': folder['new']}, 'folder_rename_response');
	+ this.request('folder_rename', {folder: folder.folder, 'new': folder['new']}, 'folder_rename_response');
	};

	// folder rename response handler
	this.folder_rename_response = function(response)
	{
	if (!this.response(response))
	return;

	this.env.folder = this.env.folder_rename;
	this.folder_list();
	};

	// folder delete request
	this.folder_delete = function(folder)
	{
	if (folder === undefined)
	folder = this.env.folder;

	if (!folder)
	return;

	// @todo: confirm

	this.set_busy(true, 'saving');
	- this.get('folder_delete', {folder: folder}, 'folder_delete_response');
	+ this.request('folder_delete', {folder: folder}, 'folder_delete_response');
	};

	// folder delete response handler
	this.folder_delete_response = function(response)
	{
	if (!this.response(response))
	return;

	this.env.folder = null;
	$('#filelist tbody').empty();
	this.enable_command('folder.delete', 'folder.edit', 'file.list', 'file.search', 'file.upload', false);
	this.folder_list();
	};

	// file list request
	this.file_list = function(params)
	{
	if (!params)
	params = {};

	if (params.all_folders) {
	params.collection = null;
	params.folder = null;
	this.folder_unselect();
	}

	if (params.collection == undefined)
	params.collection = this.env.collection;
	if (params.folder == undefined)
	params.folder = this.env.folder;
	if (params.sort == undefined)
	params.sort = this.env.sort_col;
	if (params.reverse == undefined)
	params.reverse = this.env.sort_reverse;
	if (params.search == undefined)
	params.search = this.env.search;

	this.env.collection = params.collection;
	this.env.folder = params.folder;
	this.env.sort_col = params.sort;
	this.env.sort_reverse = params.reverse;

	// empty the list
	$('#filelist tbody').empty();
	this.env.file_list = [];
	this.env.list_shift_start = null;
	this.enable_command('file.open', 'file.get', 'file.rename', 'file.delete', 'file.copy', 'file.move', false);

	// request
	if (params.collection \|\| params.all_folders)
	this.file_list_loop(params);
	else {
	this.set_busy(true, 'loading');
	- this.get('file_list', params, 'file_list_response');
	+ this.request('file_list', params, 'file_list_response');
	}
	};

	// call file.list request for every folder (used for search and virt. collections)
	this.file_list_loop = function(params)
	{
	var i, folders = [], limit = Math.max(this.env.search_threads \|\| 1, 1);

	if (params.collection) {
	if (!params.search)
	params.search = {};
	params.search['class'] = params.collection;
	delete params['collection'];
	}

	delete params['all_folders'];

	$.each(this.env.folders, function(i, f) {
	if (!f.virtual)
	folders.push(i);
	});

	this.env.folders_loop = folders;
	this.env.folders_loop_params = params;
	this.env.folders_loop_lock = false;

	for (i=0; i<folders.length && i<limit; i++) {
	this.set_busy(true, 'loading');
	params.folder = folders.shift();
	- this.get('file_list', params, 'file_list_loop_response');
	+ this.request('file_list', params, 'file_list_loop_response');
	}
	};

	// file list response handler
	this.file_list_response = function(response)
	{
	if (!this.response(response))
	return;

	var table = $('#filelist'), list = [];

	$.each(response.result, function(key, data) {
	var row = ui.file_list_row(key, data);
	table.append(row);
	data.row = row;
	list.push(data);
	});

	this.env.file_list = list;
	};

	// file list response handler for loop'ed request
	this.file_list_loop_response = function(response)
	{
	var i, folders = this.env.folders_loop,
	params = this.env.folders_loop_params,
	limit = Math.max(this.env.search_threads \|\| 1, 1),
	valid = this.response(response);

	for (i=0; i<folders.length && i<limit; i++) {
	this.set_busy(true, 'loading');
	params.folder = folders.shift();
	- this.get('file_list', params, 'file_list_loop_response');
	+ this.request('file_list', params, 'file_list_loop_response');
	}

	if (!valid)
	return;

	this.file_list_loop_result_add(response.result);
	};

	// add files from list request to the table (with sorting)
	this.file_list_loop_result_add = function(result)
	{
	// chack if result (hash-array) is empty
	if (!object_is_empty(result))
	return;

	if (this.env.folders_loop_lock) {
	setTimeout(function() { ui.file_list_loop_result_add(result); }, 100);
	return;
	}

	// lock table, other list responses will wait
	this.env.folders_loop_lock = true;

	var n, i, len, elem, list = [], table = $('#filelist');

	for (n=0, len=this.env.file_list.length; n<len; n++) {
	elem = this.env.file_list[n];
	for (i in result) {
	if (this.sort_compare(elem, result[i]) < 0)
	break;

	var row = this.file_list_row(i, result[i]);
	elem.row.before(row);
	result[i].row = row;
	list.push(result[i]);
	delete result[i];
	}

	list.push(elem);
	}

	// add the rest of rows
	$.each(result, function(key, data) {
	var row = ui.file_list_row(key, data);
	table.append(row);
	result[key].row = row;
	list.push(result[key]);
	});

	this.env.file_list = list;
	this.env.folders_loop_lock = false;
	};

	// sort files list (without API request)
	this.file_list_sort = function(col, reverse)
	{
	var n, len, list = this.env.file_list,
	table = $('#filelist'), tbody = $('<tbody>');

	this.env.sort_col = col;
	this.env.sort_reverse = reverse;

	if (!list \|\| !list.length)
	return;

	// sort the list
	list.sort(function (a, b) {
	return ui.sort_compare(a, b);
	});

	// add rows to the new body
	for (n=0, len=list.length; n<len; n++) {
	tbody.append(list[n].row);
	}

	// replace table bodies
	$('tbody', table).replaceWith(tbody);
	};

	// file delete request
	this.file_delete = function(file)
	{
	if (!file) {
	file = [];

	if (this.env.file)
	file.push(this.env.file);
	else
	file = this.file_list_selected();
	}

	this.set_busy(true, 'deleting');
	- this.get('file_delete', {file: file}, 'file_delete_response');
	+ this.request('file_delete', {file: file}, 'file_delete_response');
	};

	// file delete response handler
	this.file_delete_response = function(response)
	{
	if (!this.response(response))
	return;

	if (this.env.file) {
	// @TODO: reload list if on the same folder only
	if (window.opener && window.opener.ui)
	window.opener.ui.file_list();
	window.close();
	}
	else
	this.file_list();
	};

	// file rename request
	this.file_rename = function(file, newname)
	{
	if (file === newname)
	return;

	this.set_busy(true, 'saving');
	- this.get('file_move', {file: file, 'new': newname}, 'file_rename_response');
	+ this.request('file_move', {file: file, 'new': newname}, 'file_rename_response');
	};

	// file rename response handler
	this.file_rename_response = function(response)
	{
	if (!this.response(response))
	return;

	// @TODO: we could update list/file metadata and just sort
	this.file_list();
	};

	// file copy request
	this.file_copy = function(folder)
	{
	var count = 0, list = {}, files = this.file_list_selected();

	if (!files \|\| !files.length \|\| !folder)
	return;

	$.each(files, function(i, v) {
	var name = folder + ui.env.directory_separator + ui.file_name(v);

	if (name != v) {
	list[v] = name;
	count++;
	}
	});

	if (!count)
	return;

	this.set_busy(true, 'copying');
	- this.get('file_copy', {file: list}, 'file_copy_response');
	+ this.request('file_copy', {file: list}, 'file_copy_response');
	};

	// file copy response handler
	this.file_copy_response = function(response)
	{
	if (!this.response(response))
	return;

	if (response.result && response.result.already_exist && response.result.already_exist.length)
	this.file_move_ask_user(response.result.already_exist);
	};

	// file move request
	this.file_move = function(folder)
	{
	var count = 0, list = {}, files = this.file_list_selected();

	if (!files \|\| !files.length \|\| !folder)
	return;

	$.each(files, function(i, v) {
	var name = folder + ui.env.directory_separator + ui.file_name(v);

	if (name != v) {
	list[v] = name;
	count++;
	}
	});

	if (!count)
	return;

	this.set_busy(true, 'moving');
	- this.get('file_move', {file: list}, 'file_move_response');
	+ this.request('file_move', {file: list}, 'file_move_response');
	};

	// file move response handler
	this.file_move_response = function(response)
	{
	if (!this.response(response))
	return;

	if (response.result && response.result.already_exist && response.result.already_exist.length)
	this.file_move_ask_user(response.result.already_exist, true);
	else
	this.file_list();
	};

	this.file_download = function(file)
	{
	if (!file)
	file = this.env.file;

	location.href = this.env.url + this.url('file_get', {token: this.env.token, file: file, 'force-download': 1});
	};

	// file upload request
	this.file_upload = function()
	{
	var form = $('#uploadform'),
	field = $('input[type=file]', form).get(0),
	files = field.files ? field.files.length : field.value ? 1 : 0;

	if (files) {
	// submit form and read server response
	- this.file_upload_form(form, 'file_create', function(e, frame, folder) {
	+ this.file_upload_form(form, 'file_upload', function(e, frame, folder) {
	var doc, response, res;

	try {
	doc = frame.contentDocument ? frame.contentDocument : frame.contentWindow.document;
	response = doc.body.innerHTML;

	// in Opera onload is called twice, once with empty body
	if (!response)
	return;
	// response may be wrapped in <pre> tag
	if (response.match(/^<pre[^>]>(.)<\/pre>$/i))
	response = RegExp.$1;

	response = eval('(' + response + ')');
	}
	catch (err) {
	response = {status: 'ERROR'};
	}

	if ((res = ui.response_parse(response)) && folder == ui.env.folder)
	ui.file_list();

	return res;
	});
	}
	};


	/*********************************************************/
	/******* Command helpers *******/
	/*********************************************************/

	// create folders table row
	this.folder_list_row = function(folder, data)
	{
	var row = $('<tr><td><span class="branch"></span><span class="name"></span></td></tr>'),
	span = $('span.name', row);

	span.text(data.name);
	row.attr('id', data.id).data('folder', folder);

	if (data.depth)
	$('span.branch', row).width(15 * data.depth);

	if (data.virtual)
	row.addClass('virtual');
	else {
	span.click(function() { ui.folder_select(folder); })
	row.mouseenter(function() {
	if (ui.drag_active && (!ui.env.folder \|\| ui.env.folder != $(this).data('folder')))
	$(this).addClass('droptarget');
	})
	.mouseleave(function() {
	if (ui.drag_active)
	$(this).removeClass('droptarget');
	});

	if (folder == this.env.folder)
	row.addClass('selected');
	}

	return row;
	};

	// create files table row
	this.file_list_row = function(filename, data)
	{
	var row = $('<tr><td class="filename"></td>'
	+' <td class="filemtime"></td><td class="filesize"></td></tr>'),
	link = $('<span></span>').text(data.name).click(function(e) { ui.file_menu(e, filename, data.type); });

	$('td.filename', row).addClass(ui.file_type_class(data.type)).append(link);
	$('td.filemtime', row).text(data.mtime);
	$('td.filesize', row).text(ui.file_size(data.size));

	row.attr('data-file', filename)
	.click(function(e) { ui.file_list_click(e, this); })
	.mousedown(function(e) { return ui.file_list_drag(e, this); });

	// disables selection in IE
	if (document.all)
	row.on('selectstart', function() { return false; });

	return row;
	};

	// file row click event handler
	this.file_list_click = function(e, row)
	{
	var list = $('#filelist'), org = row, row = $(row),
	found, selected, shift = this.env.list_shift_start;

	if (e.shiftKey && shift && org != shift) {
	$('tr', list).each(function(i, r) {
	if (r == org) {
	found = 1;
	$(r).addClass('selected');
	return;
	}
	else if (!selected && r == shift) {
	selected = 1;
	return;
	}

	if ((!found && selected) \|\| (found && !selected))
	$(r).addClass('selected');
	else
	$(r).removeClass('selected');
	});
	}
	else if (e.ctrlKey)
	row.toggleClass('selected');
	else {
	$('tr.selected', list).removeClass('selected');
	$(row).addClass('selected');
	this.env.list_shift_start = org;
	}

	selected = $('tr.selected', list).length;

	if (!selected)
	this.env.list_shift_start = null;

	this.enable_command('file.delete', 'file.move', 'file.copy', selected);
	this.enable_command('file.open', 'file.get', 'file.rename', selected == 1);
	};

	// file row drag start event handler
	this.file_list_drag = function(e, row)
	{
	if (e.shiftKey \|\| e.ctrlKey)
	return true;

	// selects currently unselected row
	if (!$(row).hasClass('selected'))
	this.file_list_click(e, row);

	this.drag_start = true;
	this.drag_mouse_start = this.mouse_pos(e);

	$(document)
	.on('mousemove.draghandler', function(e) { ui.file_list_drag_mouse_move(e); })
	.on('mouseup.draghandler', function(e) { ui.file_list_drag_mouse_up(e); });
	/*
	if (bw.mobile) {
	$(document)
	.on('touchmove.draghandler', function(e) { ui.file_list_drag_mouse_move(e); })
	.on('touchend.draghandler', function(e) { ui.file_list_drag_mouse_up(e); });
	}
	*/
	return false;
	};

	// file row mouse move event handler
	this.file_list_drag_mouse_move = function(e)
	{
	/*
	// convert touch event
	if (e.type == 'touchmove') {
	if (e.changedTouches.length == 1)
	e = rcube_event.touchevent(e.changedTouches[0]);
	else
	return rcube_event.cancel(e);
	}
	*/
	var max_rows = 10, pos = this.mouse_pos(e);

	if (this.drag_start) {
	// check mouse movement, of less than 3 pixels, don't start dragging
	if (!this.drag_mouse_start \|\| (Math.abs(pos.left - this.drag_mouse_start.left) < 3 && Math.abs(pos.top - this.drag_mouse_start.top) < 3))
	return false;

	if (!this.draglayer)
	this.draglayer = $('<div>').attr('id', 'draglayer')
	.css({position:'absolute', display:'none', 'z-index':2000})
	.appendTo(document.body);

	// reset content
	this.draglayer.html('');

	// get subjects of selected messages
	$('#filelist tr.selected').slice(0, max_rows+1).each(function(i) {
	if (i == 0)
	ui.drag_start_pos = $(this).offset();
	else if (i == max_rows) {
	ui.draglayer.append('...');
	return;
	}

	var subject = $('td.filename', this).text();

	// truncate filename to 50 characters
	if (subject.length > 50)
	subject = subject.substring(0, 50) + '...';

	ui.draglayer.append($('<div>').text(subject));
	});

	this.draglayer.show();
	this.drag_active = true;
	}

	if (this.drag_active && this.draglayer)
	this.draglayer.css({left:(pos.left+20)+'px', top:(pos.top-5 + (this.ie ? document.documentElement.scrollTop : 0))+'px'});

	this.drag_start = false;

	return false;
	};

	// file row mouse up event handler
	this.file_list_drag_mouse_up = function(e)
	{
	document.onmousemove = null;
	/*
	if (e.type == 'touchend') {
	if (e.changedTouches.length != 1)
	return rcube_event.cancel(e);
	}
	*/

	$(document).off('.draghandler');
	this.drag_active = false;

	var got_folder = this.file_list_drag_end(e);

	if (this.draglayer && this.draglayer.is(':visible')) {
	if (this.drag_start_pos && !got_folder)
	this.draglayer.animate(this.drag_start_pos, 300, 'swing').hide(20);
	else
	this.draglayer.hide();
	}
	};

	// files drag end handler
	this.file_list_drag_end = function(e)
	{
	var folder = $('#folderlist tr.droptarget').removeClass('droptarget');

	if (folder.length) {
	folder = folder.data('folder');

	if (e.shiftKey && this.commands['file.copy']) {
	this.file_drag_menu(e, folder);
	return true;
	}

	this.command('file.move', folder);

	return true;
	}
	};

	// display file drag menu
	this.file_drag_menu = function(e, folder)
	{
	var menu = $('#file-drag-menu');

	$('li.file-copy > a', menu).off('click').click(function() { ui.command('file.copy', folder); });
	$('li.file-move > a', menu).off('click').click(function() { ui.command('file.move', folder); });

	this.popup_show(e, menu);
	};

	// display file menu
	this.file_menu = function(e, file, type)
	{
	var href, caps, viewer,
	menu = $('#file-menu'),
	open_action = $('li.file-open > a', menu);

	if (viewer = this.file_type_supported(type)) {
	caps = this.browser_capabilities().join();
	href = '?' + $.param({task: 'file', action: 'open', token: this.env.token, file: file, caps: caps, viewer: viewer == 2 ? 1 : 0});
	open_action.attr({target: '_blank', href: href}).removeClass('disabled').off('click');
	}
	else
	open_action.click(function() { return false; }).addClass('disabled');

	$('li.file-download > a', menu)
	.attr({href: this.env.url + this.url('file_get', {token: this.env.token, file: file, 'force-download': 1})});
	$('li.file-delete > a', menu).off('click').click(function() { ui.file_delete(file); });
	$('li.file-rename > a', menu).off('click').click(function() { ui.file_rename_start(e); });

	this.popup_show(e, menu);
	};

	// returns selected files (with paths)
	this.file_list_selected = function()
	{
	var files = [];

	$('#filelist tr.selected').each(function() {
	files.push($(this).data('file'));
	});

	return files;
	};

	this.file_rename_start = function(e)
	{
	var list = $('#filelist'),
	tr = $(e.target).parents('tr'),
	td = $('td.filename', tr),
	file = tr.data('file'),
	name = this.file_name(file),
	input = $('<input>').attr({type: 'text', name: 'filename', 'class': 'filerename'})
	.val(name).data('file', file)
	.click(function(e) { e.stopPropagation(); })
	.keydown(function(e) {
	switch (e.which) {
	case 27: // ESC
	ui.file_rename_stop();
	break;
	case 13: // Enter
	var elem = $(this),
	newname = elem.val(),
	oldname = elem.data('file'),
	path = ui.file_path(file);

	ui.file_rename(oldname, path + ui.env.directory_separator + newname);
	elem.parent().text(newname);
	break;
	}
	});

	$('span', td).text('').append(input);
	input.focus();
	};

	this.file_rename_stop = function()
	{
	$('input.filerename').each(function() {
	var elem = $(this), name = ui.file_name(elem.data('file'));
	elem.parent().text(name);
	});
	};

	// post the given form to a hidden iframe
	this.file_upload_form = function(form, action, onload)
	{
	var ts = new Date().getTime(),
	frame_name = 'fileupload' + ts;

	// upload progress supported (and handler exists)
	if (this.env.capabilities.PROGRESS_NAME && window.progress_update) {
	var fname = this.env.capabilities.PROGRESS_NAME,
	field = $('input[name='+fname+']', form);

	if (!field.length) {
	field = $('<input>').attr({type: 'hidden', name: fname});
	field.prependTo(form);
	}

	field.val(ts);
	this.uploads[ts] = this.env.folder;
	this.file_upload_progress(ts);
	}

	// have to do it this way for IE
	// otherwise the form will be posted to a new window
	if (document.all) {
	var html = '<iframe id="'+frame_name+'" name="'+frame_name+'"'
	+ ' src="program/resources/blank.gif" style="width:0;height:0;visibility:hidden;"></iframe>';
	document.body.insertAdjacentHTML('BeforeEnd', html);
	}
	// for standards-compliant browsers
	else
	$('<iframe>')
	.attr({name: frame_name, id: frame_name})
	.css({border: 'none', width: 0, height: 0, visibility: 'hidden'})
	.appendTo(document.body);

	// handle upload errors, parsing iframe content in onload
	$('#'+frame_name).load(function(e) {
	// hide progressbar on upload error
	if (!onload(e, this, ui.uploads[ts]) && window.progress_update)
	window.progress_update({id: ts, done: true});
	delete ui.uploads[ts];
	});

	$(form).attr({
	target: frame_name,
	action: this.env.url + this.url(action, {folder: this.env.folder, token: this.env.token, uploadid:ts}),
	method: 'POST'
	}).attr(form.encoding ? 'encoding' : 'enctype', 'multipart/form-data')
	.submit();
	};

	// upload progress requests
	this.file_upload_progress = function(id)
	{
	setTimeout(function() {
	if (id && ui.uploads[id])
	- ui.get('upload_progress', {id: id}, 'file_upload_progress_response');
	+ ui.request('upload_progress', {id: id}, 'file_upload_progress_response');
	}, this.env.capabilities.PROGRESS_TIME * 1000);
	};

	// upload progress response
	this.file_upload_progress_response = function(response)
	{
	if (!this.response(response))
	return;

	var param = response.result;

	if (param.id && window.progress_update)
	window.progress_update(param);

	if (!param.done)
	this.file_upload_progress(param.id);
	};

	// Display file search form
	this.file_search = function()
	{
	var form = this.form_show('file-search'),
	has_folder = this.env.folder \|\| this.env.collection,
	radio1 = $('input[name="all_folders"][value="0"]', form);

	$('input[name="name"]', form).val('').focus();

	if (has_folder)
	radio1.prop('disabled', false).click();
	else {
	radio1.prop('disabled', true);
	$('input[name="all_folders"][value="1"]', form).click();
	}
	};

	// Hide file search form
	this.file_search_stop = function()
	{
	if (this.env.search)
	this.file_list(null, {search: null});

	this.form_hide('file-search');
	this.env.search = null;
	};

	// Execute file search
	this.file_search_submit = function()
	{
	var form = this.form_show('file-search'),
	value = $('input[name="name"]', form).val(),
	all = $('input[name="all_folders"]:checked', form).val();

	if (value) {
	this.env.search = {name: value};
	this.file_list({search: this.env.search, all_folders: all == 1});
	}
	else
	this.file_search_stop();
	};

	// Display folder creation form
	this.folder_create_start = function()
	{
	var form = this.form_show('folder-create');
	$('input[name="name"]', form).val('').focus();
	$('input[name="parent"]', form).prop('checked', this.env.folder)
	.prop('disabled', !this.env.folder);
	};

	// Hide folder creation form
	this.folder_create_stop = function()
	{
	this.form_hide('folder-create');
	};

	// Submit folder creation form
	this.folder_create_submit = function()
	{
	var folder = '', data = this.serialize_form('#folder-create-form');

	if (!data.name)
	return;

	if (data.parent && this.env.folder)
	folder = this.env.folder + this.env.directory_separator;

	folder += data.name;

	this.folder_create_stop();
	this.command('folder.create', folder);
	};

	// Display folder edit form
	this.folder_edit_start = function()
	{
	var form = this.form_show('folder-edit'),
	arr = this.env.folder.split(this.env.directory_separator),
	name = arr.pop();

	this.env.folder_edit_path = arr.join(this.env.directory_separator);

	$('input[name="name"]', form).val(name).focus();
	};

	// Hide folder edit form
	this.folder_edit_stop = function()
	{
	this.form_hide('folder-edit');
	};

	// Submit folder edit form
	this.folder_edit_submit = function()
	{
	var folder = '', data = this.serialize_form('#folder-edit-form');

	if (!data.name)
	return;

	if (this.env.folder_edit_path)
	folder = this.env.folder_edit_path + this.env.directory_separator;

	folder += data.name;
	this.env.folder_rename = folder;

	this.folder_edit_stop();
	this.command('folder.edit', {folder: this.env.folder, 'new': folder});
	};

	// when file move/copy operation returns file-exists error
	// this displays a dialog where user can decide to skip
	// or overwrite destination file(s)
	this.file_move_ask_user = function(list, move)
	{
	var file = list[0], buttons = {},
	label = this.t('file.moveconfirm').replace('$file', file.dst);

	buttons['file.overwrite'] = function() {
	var file = list.shift(), f = {},
	action = move ? 'file_move' : 'file_copy';

	f[file.src] = file.dst;
	ui.file_move_ask_list = list;
	ui.file_move_ask_mode = move;
	this.hide();
	ui.set_busy(true, move ? 'moving' : 'copying');
	- ui.get(action, {file: f, overwrite: 1}, 'file_move_ask_user_response');
	+ ui.request(action, {file: f, overwrite: 1}, 'file_move_ask_user_response');
	};

	if (list.length > 1)
	buttons['file.overwriteall'] = function() {
	var f = {}, action = move ? 'file_move' : 'file_copy';

	$.each(list, function() { f[this.src] = this.dst; });
	this.hide();
	ui.set_busy(true, move ? 'moving' : 'copying');
	- ui.get(action, {file: f, overwrite: 1}, action + '_response');
	+ ui.request(action, {file: f, overwrite: 1}, action + '_response');
	};

	buttons['file.skip'] = function() {
	list.shift();
	this.hide();
	if (list.length)
	ui.file_move_ask_user(list, move);
	else if (move)
	ui.file_list();
	};

	if (list.length > 1)
	buttons['file.skipall'] = function() {
	this.hide();
	if (move)
	ui.file_list();
	};

	this.modal_dialog(label, buttons);
	};

	// file move (with overwrite) response handler
	this.file_move_ask_user_response = function(response)
	{
	var mode = this.file_move_ask_mode, list = this.file_move_ask_list;

	this.response(response);

	if (list && list.length)
	this.file_move_ask_user(list, mode);
	else if (mode)
	this.file_list();
	};

	/*********************************************************/
	/******* Utilities *******/
	/*********************************************************/

	// modal dialog popup
	this.modal_dialog = function(content, buttons, opts)
	{
	var settings = {position: 'cm', btns: {}, fxShow: 'fade'},
	dialog = $('<div class="_wModal"></div>'),
	body = $('<div class="_wModal"></div>'),
	head, foot, footer = [];

	// title bar
	if (opts && opts.title)
	$('<div class="_wModal_header"></div>')
	.append($('<span>').text(opts.title))
	.appendTo(body);

	// dialog content
	if (typeof content != 'object')
	content = $('<div></div>').html(content);

	content.addClass('_wModal_msg').appendTo(body);

	// buttons
	$.each(buttons, function(i, v) {
	var n = i.replace(/[^a-z0-9_]/ig, '');
	settings.btns[n] = v;
	footer.push({name: n, label: ui.t(i)});
	});

	// if (!settings.btns.cancel && (!opts \|\| !opts.no_cancel))
	// settings.btns.cancel = function() { this.hide(); };

	if (footer.length) {
	foot = $('<div class="_wModal_btns"></div>');
	$.each(footer, function() {
	$('<div></div>').addClass('_wModal_btn_' + this.name).text(this.label).appendTo(foot);
	});

	body.append(foot);
	}

	// configure and display dialog
	dialog.append(body).wModal(settings).wModal('show');
	};

	// Display folder creation form
	this.form_show = function(name)
	{
	var form = $('#' + name + '-form');
	$('#forms > form').hide();
	form.show();
	$('#taskcontent').css('top', form.height() + 20);

	return form;
	};

	// Display folder creation form
	this.form_hide = function(name)
	{
	var form = $('#' + name + '-form');
	form.hide();
	$('#taskcontent').css('top', 10);
	};

	// loads a file content into an iframe (with loading image)
	this.load_file = function(content, filedata)
	{
	var iframe = $(content);

	if (!iframe.length)
	return;

	var href = filedata.href,
	div = iframe.parent(),
	loader = $('#loader'),
	offset = div.offset(),
	w = loader.width(), h = loader.height(),
	width = div.width(), height = div.height();

	loader.css({
	top: offset.top + height/2 - h/2 - 20,
	left: offset.left + width/2 - w/2
	}).show();
	iframe.css('opacity', 0.1)
	.load(function() { ui.loader_hide(this); })
	.attr('src', href);

	// some content, e.g. movies or flash doesn't execute onload on iframe
	// let's wait some time and check document ready state
	if (!/^text/i.test(filedata.mimetype))
	setTimeout(function() {
	// there sometimes "Permission denied to access propert document", use try/catch
	try {
	$(iframe.get(0).contentWindow.document).ready(function() {
	parent.ui.loader_hide(content);
	});
	} catch (e) {};
	}, 1000);
	};

	// hide content loader element, show content element
	this.loader_hide = function(content)
	{
	$('#loader').hide();
	$(content).css('opacity', 1);
	};
	};

	// Initialize application object (don't change var name!)
	var ui = $.extend(new files_api(), new files_ui());

	// general click handler
	$(document).click(function() {
	$('.popup').hide();
	ui.file_rename_stop();
	}).ready(function() {
	ui.init();
	});

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