rcmail_output_html.php
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rcmail_output_html.php
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	<?php

	/**
	+-----------------------------------------------------------------------+
	\| This file is part of the Roundcube Webmail client \|
	\| \|
	\| Copyright (C) The Roundcube Dev Team \|
	\| \|
	\| Licensed under the GNU General Public License version 3 or \|
	\| any later version with exceptions for skins & plugins. \|
	\| See the README file for a full license statement. \|
	\| \|
	\| PURPOSE: \|
	\| Class to handle HTML page output using a skin template. \|
	+-----------------------------------------------------------------------+
	\| Author: Thomas Bruederli <roundcube@gmail.com> \|
	+-----------------------------------------------------------------------+
	*/

	/**
	* Class to create HTML page output using a skin template
	*
	* @package Webmail
	* @subpackage View
	*/
	class rcmail_output_html extends rcmail_output
	{
	public $type = 'html';

	protected $message;
	protected $template_name;
	protected $objects = [];
	protected $js_env = [];
	protected $js_labels = [];
	protected $js_commands = [];
	protected $skin_paths = [];
	protected $skin_name = '';
	protected $scripts_path = '';
	protected $script_files = [];
	protected $css_files = [];
	protected $scripts = [];
	protected $meta_tags = [];
	protected $link_tags = ['shortcut icon' => ''];
	protected $header = '';
	protected $footer = '';
	protected $body = '';
	protected $base_path = '';
	protected $assets_path;
	protected $assets_dir = RCUBE_INSTALL_PATH;
	protected $devel_mode = false;
	protected $default_template = "<html>\n<head><meta name='generator' content='Roundcube'></head>\n<body></body>\n</html>";

	// deprecated names of templates used before 0.5
	protected $deprecated_templates = [
	'contact' => 'showcontact',
	'contactadd' => 'addcontact',
	'contactedit' => 'editcontact',
	'identityedit' => 'editidentity',
	'messageprint' => 'printmessage',
	];

	// deprecated names of template objects used before 1.4
	protected $deprecated_template_objects = [
	'addressframe' => 'contentframe',
	'messagecontentframe' => 'contentframe',
	'prefsframe' => 'contentframe',
	'folderframe' => 'contentframe',
	'identityframe' => 'contentframe',
	'responseframe' => 'contentframe',
	'keyframe' => 'contentframe',
	'filterframe' => 'contentframe',
	];

	/**
	* Constructor
	*/
	public function __construct($task = null, $framed = false)
	{
	parent::__construct();

	$this->devel_mode = $this->config->get('devel_mode');

	$this->set_env('task', $task);
	$this->set_env('standard_windows', (bool) $this->config->get('standard_windows'));
	$this->set_env('locale', !empty($_SESSION['language']) ? $_SESSION['language'] : 'en_US');
	$this->set_env('devel_mode', $this->devel_mode);

	// Version number e.g. 1.4.2 will be 10402
	$version = explode('.', preg_replace('/[^0-9.].*/', '', RCMAIL_VERSION));
	$this->set_env('rcversion', $version[0] * 10000 + $version[1] * 100 + (isset($version[2]) ? $version[2] : 0));

	// add cookie info
	$this->set_env('cookie_domain', ini_get('session.cookie_domain'));
	$this->set_env('cookie_path', ini_get('session.cookie_path'));
	$this->set_env('cookie_secure', filter_var(ini_get('session.cookie_secure'), FILTER_VALIDATE_BOOLEAN));

	// Easy way to change skin via GET argument, for developers
	if ($this->devel_mode && !empty($_GET['skin']) && preg_match('/^[a-z0-9-_]+$/i', $_GET['skin'])) {
	if ($this->check_skin($_GET['skin'])) {
	$this->set_skin($_GET['skin']);
	$this->app->user->save_prefs(['skin' => $_GET['skin']]);
	}
	}

	// load and setup the skin
	$this->set_skin($this->config->get('skin'));
	$this->set_assets_path($this->config->get('assets_path'), $this->config->get('assets_dir'));

	if (!empty($_REQUEST['_extwin'])) {
	$this->set_env('extwin', 1);
	}

	if ($this->framed \|\| $framed) {
	$this->set_env('framed', 1);
	}

	$lic = <<<EOF
	/*
	@licstart The following is the entire license notice for the
	JavaScript code in this page.

	Copyright (C) The Roundcube Dev Team

	The JavaScript code in this page is free software: you can redistribute
	it and/or modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation, either version 3 of
	the License, or (at your option) any later version.

	The code is distributed WITHOUT ANY WARRANTY; without even the implied
	warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	See the GNU GPL for more details.

	@licend The above is the entire license notice
	for the JavaScript code in this page.
	*/
	EOF;
	// add common javascripts
	$this->add_script($lic, 'head_top');
	$this->add_script('var '.self::JS_OBJECT_NAME.' = new rcube_webmail();', 'head_top');

	// don't wait for page onload. Call init at the bottom of the page (delayed)
	$this->add_script(self::JS_OBJECT_NAME.'.init();', 'docready');

	$this->scripts_path = 'program/js/';
	$this->include_script('jquery.min.js');
	$this->include_script('common.js');
	$this->include_script('app.js');

	// register common UI objects
	$this->add_handlers([
	'loginform' => [$this, 'login_form'],
	'preloader' => [$this, 'preloader'],
	'username' => [$this, 'current_username'],
	'message' => [$this, 'message_container'],
	'charsetselector' => [$this, 'charset_selector'],
	'aboutcontent' => [$this, 'about_content'],
	]);

	// set blankpage (watermark) url
	$blankpage = $this->config->get('blankpage_url', '/watermark.html');
	$this->set_env('blankpage', $blankpage);
	}

	/**
	* Set environment variable
	*
	* @param string $name Property name
	* @param mixed $value Property value
	* @param bool $addtojs True if this property should be added
	* to client environment
	*/
	public function set_env($name, $value, $addtojs = true)
	{
	$this->env[$name] = $value;

	if ($addtojs \|\| isset($this->js_env[$name])) {
	$this->js_env[$name] = $value;
	}
	}

	/**
	* Parse and set assets path
	*
	* @param string $path Assets path URL (relative or absolute)
	* @param string $fs_dif Assets path in filesystem
	*/
	public function set_assets_path($path, $fs_dir = null)
	{
	// set absolute path for assets if /index.php/foo/bar url is used
	if (empty($path) && !empty($_SERVER['PATH_INFO'])) {
	$path = preg_replace('/\/?\?_task=[a-z]+/', '', $this->app->url([], true));
	}

	if (empty($path)) {
	return;
	}

	$path = rtrim($path, '/') . '/';

	// handle relative assets path
	if (!preg_match('\|^https?://\|', $path) && $path[0] != '/') {
	// save the path to search for asset files later
	$this->assets_dir = $path;

	$base = preg_replace('/[?#&].*$/', '', $_SERVER['REQUEST_URI']);
	$base = rtrim($base, '/');

	// remove url token if exists
	if ($len = intval($this->config->get('use_secure_urls'))) {
	$_base = explode('/', $base);
	$last = count($_base) - 1;
	$length = $len > 1 ? $len : 16; // as in rcube::get_secure_url_token()

	// we can't use real token here because it
	// does not exists in unauthenticated state,
	// hope this will not produce false-positive matches
	if ($last > -1 && preg_match('/^[a-f0-9]{' . $length . '}$/', $_base[$last])) {
	$path = '../' . $path;
	}
	}
	}

	// set filesystem path for assets
	if ($fs_dir) {
	if ($fs_dir[0] != '/') {
	$fs_dir = realpath(RCUBE_INSTALL_PATH . $fs_dir);
	}
	// ensure the path ends with a slash
	$this->assets_dir = rtrim($fs_dir, '/') . '/';
	}

	$this->assets_path = $path;
	$this->set_env('assets_path', $path);
	}

	/**
	* Getter for the current page title
	*
	* @param bool $full Prepend title with product/user name
	*
	* @return string The page title
	*/
	protected function get_pagetitle($full = true)
	{
	if (!empty($this->pagetitle)) {
	$title = $this->pagetitle;
	}
	else if (isset($this->env['task'])) {
	if ($this->env['task'] == 'login') {
	$title = $this->app->gettext([
	'name' => 'welcome',
	'vars' => ['product' => $this->config->get('product_name')]
	]);
	}
	else {
	$title = ucfirst($this->env['task']);
	}
	}
	else {
	$title = '';
	}

	if ($full && $title) {
	if ($this->devel_mode && !empty($_SESSION['username'])) {
	$title = $_SESSION['username'] . ' :: ' . $title;
	}
	else if ($prod_name = $this->config->get('product_name')) {
	$title = $prod_name . ' :: ' . $title;
	}
	}

	return $title;
	}

	/**
	* Getter for the current skin path property
	*/
	public function get_skin_path()
	{
	return $this->skin_paths[0];
	}

	/**
	* Set skin
	*
	* @param string $skin Skin name
	*/
	public function set_skin($skin)
	{
	if (!$this->check_skin($skin)) {
	// If the skin does not exist (could be removed or invalid),
	// fallback to the skin set in the system configuration (#7271)
	$skin = $this->config->system_skin;
	}

	$skin_path = 'skins/' . $skin;

	$this->config->set('skin_path', $skin_path);
	$this->base_path = $skin_path;

	// register skin path(s)
	$this->skin_paths = [];
	$this->skins = [];
	$this->load_skin($skin_path);

	$this->skin_name = $skin;
	$this->set_env('skin', $skin);
	}

	/**
	* Check skin validity/existence
	*
	* @param string $skin Skin name
	*
	* @return bool True if the skin exist and is readable, False otherwise
	*/
	public function check_skin($skin)
	{
	// Sanity check to prevent from path traversal vulnerability (#1490620)
	if (!is_string($skin) \|\| strpos($skin, '/') !== false \|\| strpos($skin, "\\") !== false) {
	rcube::raise_error([
	'file' => __FILE__,
	'line' => __LINE__,
	'message' => 'Invalid skin name'
	], true, false);

	return false;
	}

	$skins_allowed = $this->config->get('skins_allowed');

	if (!empty($skins_allowed) && !in_array($skin, (array) $skins_allowed)) {
	return false;
	}

	$path = RCUBE_INSTALL_PATH . 'skins/';

	return !empty($skin) && is_dir($path . $skin) && is_readable($path . $skin);
	}

	/**
	* Helper method to recursively read skin meta files and register search paths
	*/
	private function load_skin($skin_path)
	{
	$this->skin_paths[] = $skin_path;

	// read meta file and check for dependencies
	$meta = @file_get_contents(RCUBE_INSTALL_PATH . $skin_path . '/meta.json');
	$meta = @json_decode($meta, true);

	$meta['path'] = $skin_path;
	$path_elements = explode('/', $skin_path);
	$skin_id = end($path_elements);

	if (empty($meta['name'])) {
	$meta['name'] = $skin_id;
	}

	$this->skins[$skin_id] = $meta;

	// Keep skin config for ajax requests (#6613)
	$_SESSION['skin_config'] = [];

	if (!empty($meta['extends'])) {
	$path = RCUBE_INSTALL_PATH . 'skins/';
	if (is_dir($path . $meta['extends']) && is_readable($path . $meta['extends'])) {
	$_SESSION['skin_config'] = $this->load_skin('skins/' . $meta['extends']);
	}
	}

	if (!empty($meta['config'])) {
	foreach ($meta['config'] as $key => $value) {
	$this->config->set($key, $value, true);
	$_SESSION['skin_config'][$key] = $value;
	}

	$value = array_merge((array) $this->config->get('dont_override'), array_keys($meta['config']));
	$this->config->set('dont_override', $value, true);
	}

	if (!empty($meta['localization'])) {
	$locdir = $meta['localization'] === true ? 'localization' : $meta['localization'];
	if ($texts = $this->app->read_localization(RCUBE_INSTALL_PATH . $skin_path . '/' . $locdir)) {
	$this->app->load_language($_SESSION['language'], $texts);
	}
	}

	// Use array_merge() here to allow for global default and extended skins
	if (!empty($meta['meta'])) {
	$this->meta_tags = array_merge($this->meta_tags, (array) $meta['meta']);
	}
	if (!empty($meta['links'])) {
	$this->link_tags = array_merge($this->link_tags, (array) $meta['links']);
	}

	return $_SESSION['skin_config'];
	}

	/**
	* Check if a specific template exists
	*
	* @param string $name Template name
	*
	* @return bool True if template exists, False otherwise
	*/
	public function template_exists($name)
	{
	foreach ($this->skin_paths as $skin_path) {
	$filename = RCUBE_INSTALL_PATH . $skin_path . '/templates/' . $name . '.html';
	if (
	(is_file($filename) && is_readable($filename))
	\|\| (!empty($this->deprecated_templates[$name]) && $this->template_exists($this->deprecated_templates[$name]))
	) {
	return true;
	}
	}

	return false;
	}

	/**
	* Find the given file in the current skin path stack
	*
	* @param string $file File name/path to resolve (starting with /)
	* @param string &$skin_path Reference to the base path of the matching skin
	* @param string $add_path Additional path to search in
	* @param bool $minified Fallback to a minified version of the file
	*
	* @return string\|false Relative path to the requested file or False if not found
	*/
	public function get_skin_file($file, &$skin_path = null, $add_path = null, $minified = false)
	{
	$skin_paths = $this->skin_paths;

	if ($add_path) {
	array_unshift($skin_paths, $add_path);
	$skin_paths = array_unique($skin_paths);
	}

	if ($file[0] != '/') {
	$file = '/' . $file;
	}

	if ($skin_path = $this->find_file_path($file, $skin_paths)) {
	return $skin_path . $file;
	}

	if ($minified && preg_match('/(?<!\.min)\.(js\|css)$/', $file)) {
	$file = preg_replace('/\.(js\|css)$/', '.min.\\1', $file);

	if ($skin_path = $this->find_file_path($file, $skin_paths)) {
	return $skin_path . $file;
	}
	}

	return false;
	}

	/**
	* Find path of the asset file
	*/
	protected function find_file_path($file, $skin_paths)
	{
	foreach ($skin_paths as $skin_path) {
	if ($this->assets_dir != RCUBE_INSTALL_PATH) {
	if (realpath($this->assets_dir . $skin_path . $file)) {
	return $skin_path;
	}
	}

	if (realpath(RCUBE_INSTALL_PATH . $skin_path . $file)) {
	return $skin_path;
	}
	}
	}

	/**
	* Register a GUI object to the client script
	*
	* @param string $obj Object name
	* @param string $id Object ID
	*/
	public function add_gui_object($obj, $id)
	{
	$this->add_script(self::JS_OBJECT_NAME.".gui_object('$obj', '$id');");
	}

	/**
	* Call a client method
	*
	* @param string Method to call
	* @param ... Additional arguments
	*/
	public function command()
	{
	$cmd = func_get_args();

	if (strpos($cmd[0], 'plugin.') !== false) {
	$this->js_commands[] = ['triggerEvent', $cmd[0], $cmd[1]];
	}
	else {
	$this->js_commands[] = $cmd;
	}
	}

	/**
	* Add a localized label to the client environment
	*/
	public function add_label()
	{
	$args = func_get_args();

	if (count($args) == 1 && is_array($args[0])) {
	$args = $args[0];
	}

	foreach ($args as $name) {
	$this->js_labels[$name] = $this->app->gettext($name);
	}
	}

	/**
	* Invoke display_message command
	*
	* @param string $message Message to display
	* @param string $type Message type [notice\|confirm\|error]
	* @param array $vars Key-value pairs to be replaced in localized text
	* @param bool $override Override last set message
	* @param int $timeout Message display time in seconds
	*
	* @uses self::command()
	*/
	public function show_message($message, $type = 'notice', $vars = null, $override = true, $timeout = 0)
	{
	if ($override \|\| !$this->message) {
	if ($this->app->text_exists($message)) {
	if (!empty($vars)) {
	$vars = array_map(['rcube','Q'], $vars);
	}

	$msgtext = $this->app->gettext(['name' => $message, 'vars' => $vars]);
	}
	else {
	$msgtext = $message;
	}

	$this->message = $message;
	$this->command('display_message', $msgtext, $type, $timeout * 1000);
	}
	}

	/**
	* Delete all stored env variables and commands
	*
	* @param bool $all Reset all env variables (including internal)
	*/
	public function reset($all = false)
	{
	$framed = $this->framed;
	$task = isset($this->env['task']) ? $this->env['task'] : '';
	$env = $all ? null : array_intersect_key($this->env, ['extwin' => 1, 'framed' => 1]);

	// keep jQuery-UI files
	$css_files = $script_files = [];

	foreach ($this->css_files as $file) {
	if (strpos($file, 'plugins/jqueryui') === 0) {
	$css_files[] = $file;
	}
	}

	foreach ($this->script_files as $position => $files) {
	foreach ($files as $file) {
	if (strpos($file, 'plugins/jqueryui') === 0) {
	$script_files[$position][] = $file;
	}
	}
	}

	parent::reset();

	// let some env variables survive
	$this->env = $this->js_env = $env;
	$this->framed = $framed \|\| !empty($this->env['framed']);
	$this->js_labels = [];
	$this->js_commands = [];
	$this->scripts = [];
	$this->header = '';
	$this->footer = '';
	$this->body = '';
	$this->css_files = [];
	$this->script_files = [];

	// load defaults
	if (!$all) {
	$this->__construct();
	}

	// Note: we merge jQuery-UI scripts after jQuery...
	$this->css_files = array_merge($this->css_files, $css_files);
	$this->script_files = array_merge_recursive($this->script_files, $script_files);

	$this->set_env('orig_task', $task);
	}

	/**
	* Redirect to a certain url
	*
	* @param mixed $p Either a string with the action or url parameters as key-value pairs
	* @param int $delay Delay in seconds
	* @param bool $secure Redirect to secure location (see rcmail::url())
	*/
	public function redirect($p = [], $delay = 1, $secure = false)
	{
	if (!empty($this->env['extwin']) && !(is_string($p) && preg_match('#^https?://#', $p))) {
	if (!is_array($p)) {
	$p = ['_action' => $p];
	}

	$p['_extwin'] = 1;
	}

	$location = $this->app->url($p, false, false, $secure);
	$this->header('Location: ' . $location);
	exit;
	}

	/**
	* Send the request output to the client.
	* This will either parse a skin template.
	*
	* @param string $templ Template name
	* @param bool $exit True if script should terminate (default)
	*/
	public function send($templ = null, $exit = true)
	{
	if ($templ != 'iframe') {
	// prevent from endless loops
	if ($exit != 'recur' && $this->app->plugins->is_processing('render_page')) {
	rcube::raise_error([
	'code' => 505,
	'file' => __FILE__,
	'line' => __LINE__,
	'message' => 'Recursion alert: ignoring output->send()'
	], true, false
	);

	return;
	}

	$this->parse($templ, false);
	}
	else {
	$this->framed = true;
	$this->write();
	}

	// set output asap
	ob_flush();
	flush();

	if ($exit) {
	exit;
	}
	}

	/**
	* Process template and write to stdOut
	*
	* @param string $template HTML template content
	*/
	public function write($template = '')
	{
	if (!empty($this->script_files)) {
	$this->set_env('request_token', $this->app->get_request_token());
	}

	// Fix assets path on blankpage
	if (!empty($this->js_env['blankpage'])) {
	$this->js_env['blankpage'] = $this->asset_url($this->js_env['blankpage'], true);
	}

	$commands = $this->get_js_commands($framed);

	// if all js commands go to parent window we can ignore all
	// script files and skip rcube_webmail initialization (#1489792)
	// but not on error pages where skins may need jQuery, etc.
	if ($framed && empty($this->js_env['server_error'])) {
	$this->scripts = [];
	$this->script_files = [];
	$this->header = '';
	$this->footer = '';
	}

	// write all javascript commands
	if (!empty($commands)) {
	$this->add_script($commands, 'head_top');
	}

	$this->page_headers();

	// call super method
	$this->_write($template);
	}

	/**
	* Send common page headers
	* For now it only (re)sets X-Frame-Options when needed
	*/
	public function page_headers()
	{
	if (headers_sent()) {
	return;
	}

	// allow (legal) iframe content to be loaded
	$framed = $this->framed \|\| !empty($this->env['framed']);
	if ($framed && ($xopt = $this->app->config->get('x_frame_options', 'sameorigin'))) {
	if (strtolower($xopt) === 'deny') {
	$this->header('X-Frame-Options: sameorigin', true);
	}
	}
	}

	/**
	* Parse a specific skin template and deliver to stdout (or return)
	*
	* @param string $name Template name
	* @param bool $exit Exit script
	* @param bool $write Don't write to stdout, return parsed content instead
	*
	* @link http://php.net/manual/en/function.exit.php
	*/
	function parse($name = 'main', $exit = true, $write = true)
	{
	$plugin = false;
	$realname = $name;
	$skin_dir = '';
	$plugin_skin_paths = [];

	$this->template_name = $realname;

	$temp = explode('.', $name, 2);
	if (count($temp) > 1) {
	$plugin = $temp[0];
	$name = $temp[1];
	$skin_dir = $plugin . '/skins/' . $this->config->get('skin');

	// apply skin search escalation list to plugin directory
	foreach ($this->skin_paths as $skin_path) {
	// skin folder in plugin dir
	$plugin_skin_paths[] = $this->app->plugins->url . $plugin . '/' . $skin_path;
	// plugin folder in skin dir
	$plugin_skin_paths[] = $skin_path . '/plugins/' . $plugin;
	}

	// prepend plugin skin paths to search list
	$this->skin_paths = array_merge($plugin_skin_paths, $this->skin_paths);
	}

	// find skin template
	$path = false;
	foreach ($this->skin_paths as $skin_path) {
	// when requesting a plugin template ignore global skin path(s)
	if ($plugin && strpos($skin_path, $this->app->plugins->url) === false) {
	continue;
	}

	$path = RCUBE_INSTALL_PATH . "$skin_path/templates/$name.html";

	// fallback to deprecated template names
	if (!is_readable($path) && !empty($this->deprecated_templates[$realname])) {
	$dname = $this->deprecated_templates[$realname];
	$path = RCUBE_INSTALL_PATH . "$skin_path/templates/$dname.html";

	if (is_readable($path)) {
	rcube::raise_error([
	'code' => 502, 'file' => __FILE__, 'line' => __LINE__,
	'message' => "Using deprecated template '$dname' in $skin_path/templates. Please rename to '$realname'"
	], true, false
	);
	}
	}

	if (is_readable($path)) {
	$this->config->set('skin_path', $skin_path);
	// set base_path to core skin directory (not plugin's skin)
	$this->base_path = preg_replace('!plugins/\w+/!', '', $skin_path);
	$skin_dir = preg_replace('!^plugins/!', '', $skin_path);
	break;
	}
	else {
	$path = false;
	}
	}

	// read template file
	if (!$path \|\| ($templ = @file_get_contents($path)) === false) {
	rcube::raise_error([
	'code' => 404,
	'line' => __LINE__,
	'file' => __FILE__,
	'message' => 'Error loading template for '.$realname
	], true, $write);

	$this->skin_paths = array_slice($this->skin_paths, count($plugin_skin_paths));
	return false;
	}

	// replace all path references to plugins/... with the configured plugins dir
	// and /this/ to the current plugin skin directory
	if ($plugin) {
	$templ = preg_replace(
	['/\bplugins\//', '/(["\']?)\/this\//'],
	[$this->app->plugins->url, '\\1' . $this->app->plugins->url . $skin_dir . '/'],
	$templ
	);
	}

	// parse for special tags
	$output = $this->parse_conditions($templ);
	$output = $this->parse_xml($output);

	// trigger generic hook where plugins can put additional content to the page
	$hook = $this->app->plugins->exec_hook("render_page", [
	'template' => $realname,
	'content' => $output,
	'write' => $write
	]);

	// save some memory
	$output = $hook['content'];
	unset($hook['content']);

	// remove plugin skin paths from current context
	$this->skin_paths = array_slice($this->skin_paths, count($plugin_skin_paths));

	if (!$write) {
	return $this->postrender($output);
	}

	$this->write(trim($output));

	if ($exit) {
	exit;
	}
	}

	/**
	* Return executable javascript code for all registered commands
	*/
	protected function get_js_commands(&$framed = null)
	{
	$out = '';
	$parent_commands = 0;
	$parent_prefix = '';
	$top_commands = [];

	// these should be always on top,
	// e.g. hide_message() below depends on env.framed
	if (!$this->framed && !empty($this->js_env)) {
	$top_commands[] = ['set_env', $this->js_env];
	}
	if (!empty($this->js_labels)) {
	$top_commands[] = ['add_label', $this->js_labels];
	}

	// unlock interface after iframe load
	$unlock = isset($_REQUEST['_unlock']) ? preg_replace('/[^a-z0-9]/i', '', $_REQUEST['_unlock']) : 0;
	if ($this->framed) {
	$top_commands[] = ['iframe_loaded', $unlock];
	}
	else if ($unlock) {
	$top_commands[] = ['hide_message', $unlock];
	}

	$commands = array_merge($top_commands, $this->js_commands);

	foreach ($commands as $i => $args) {
	$method = array_shift($args);
	$parent = $this->framed \|\| preg_match('/^parent\./', $method);

	foreach ($args as $i => $arg) {
	$args[$i] = self::json_serialize($arg, $this->devel_mode);
	}

	if ($parent) {
	$parent_commands++;
	$method = preg_replace('/^parent\./', '', $method);
	$parent_prefix = 'if (window.parent && parent.' . self::JS_OBJECT_NAME . ') parent.';
	$method = $parent_prefix . self::JS_OBJECT_NAME . '.' . $method;
	}
	else {
	$method = self::JS_OBJECT_NAME . '.' . $method;
	}

	$out .= sprintf("%s(%s);\n", $method, implode(',', $args));
	}

	$framed = $parent_prefix && $parent_commands == count($commands);

	// make the output more compact if all commands go to parent window
	if ($framed) {
	$out = "if (window.parent && parent." . self::JS_OBJECT_NAME . ") {\n"
	. str_replace($parent_prefix, "\tparent.", $out)
	. "}\n";
	}

	return $out;
	}

	/**
	* Make URLs starting with a slash point to skin directory
	*
	* @param string $str Input string
	* @param bool $search_path True if URL should be resolved using the current skin path stack
	*
	* @return string URL
	*/
	public function abs_url($str, $search_path = false)
	{
	if (isset($str[0]) && $str[0] == '/') {
	if ($search_path && ($file_url = $this->get_skin_file($str))) {
	return $file_url;
	}

	return $this->base_path . $str;
	}

	return $str;
	}

	/**
	* Show error page and terminate script execution
	*
	* @param int $code Error code
	* @param string $message Error message
	*/
	public function raise_error($code, $message)
	{
	$args = [
	'code' => $code,
	'message' => $message,
	];

	$page = new rcmail_action_utils_error;
	$page->run($args);
	}

	/**
	* Modify path by adding URL prefix if configured
	*
	* @param string $path Asset path
	* @param bool $abs_url Pass to self::abs_url() first
	*
	* @return string Asset path
	*/
	public function asset_url($path, $abs_url = false)
	{
	// iframe content can't be in a different domain
	// @TODO: check if assets are on a different domain

	if ($abs_url) {
	$path = $this->abs_url($path, true);
	}

	if (!$this->assets_path \|\| in_array($path[0], ['?', '/', '.']) \|\| strpos($path, '://')) {
	return $path;
	}

	return $this->assets_path . $path;
	}


	/*** Template parsing methods ***/

	/**
	* Replace all strings ($varname)
	* with the content of the according global variable.
	*/
	protected function parse_with_globals($input)
	{
	$GLOBALS['__version'] = html::quote(RCMAIL_VERSION);
	$GLOBALS['__comm_path'] = html::quote($this->app->comm_path);
	$GLOBALS['__skin_path'] = html::quote($this->base_path);

	return preg_replace_callback('/\$(__[a-z0-9_\-]+)/', [$this, 'globals_callback'], $input);
	}

	/**
	* Callback function for preg_replace_callback() in parse_with_globals()
	*/
	protected function globals_callback($matches)
	{
	return $GLOBALS[$matches[1]];
	}

	/**
	* Correct absolute paths in images and other tags (add cache busters)
	*/
	protected function fix_paths($output)
	{
	$regexp = '!(src\|href\|background\|data-src-[a-z]+)=(["\']?)([a-z0-9/_.-]+)(["\'\s>])!i';

	return preg_replace_callback($regexp, [$this, 'file_callback'], $output);
	}

	/**
	* Callback function for preg_replace_callback in fix_paths()
	*
	* @return string Parsed string
	*/
	protected function file_callback($matches)
	{
	$file = $matches[3];
	$file = preg_replace('!^/this/!', '/', $file);

	// correct absolute paths
	if ($file[0] == '/') {
	$this->get_skin_file($file, $skin_path, $this->base_path);
	$file = ($skin_path ?: $this->base_path) . $file;
	}

	// add file modification timestamp
	if (preg_match('/\.(js\|css\|less\|ico\|png\|svg\|jpeg)$/', $file)) {
	$file = $this->file_mod($file);
	}

	return $matches[1] . '=' . $matches[2] . $file . $matches[4];
	}

	/**
	* Correct paths of asset files according to assets_path
	*/
	protected function fix_assets_paths($output)
	{
	$regexp = '!(src\|href\|background)=(["\']?)([a-z0-9/_.?=-]+)(["\'\s>])!i';

	return preg_replace_callback($regexp, [$this, 'assets_callback'], $output);
	}

	/**
	* Callback function for preg_replace_callback in fix_assets_paths()
	*
	* @return string Parsed string
	*/
	protected function assets_callback($matches)
	{
	$file = $this->asset_url($matches[3]);

	return $matches[1] . '=' . $matches[2] . $file . $matches[4];
	}

	/**
	* Modify file by adding mtime indicator
	*/
	protected function file_mod($file)
	{
	$fs = false;
	$ext = substr($file, strrpos($file, '.') + 1);

	// use minified file if exists (not in development mode)
	if (!$this->devel_mode && !preg_match('/\.min\.' . $ext . '$/', $file)) {
	$minified_file = substr($file, 0, strlen($ext) * -1) . 'min.' . $ext;
	if ($fs = @filemtime($this->assets_dir . $minified_file)) {
	return $minified_file . '?s=' . $fs;
	}
	}

	if ($fs = @filemtime($this->assets_dir . $file)) {
	$file .= '?s=' . $fs;
	}

	return $file;
	}

	/**
	* Public wrapper to dip into template parsing.
	*
	* @param string $input Template content
	*
	* @return string
	* @uses rcmail_output_html::parse_xml()
	* @since 0.1-rc1
	*/
	public function just_parse($input)
	{
	$input = $this->parse_conditions($input);
	$input = $this->parse_xml($input);
	$input = $this->postrender($input);

	return $input;
	}

	/**
	* Parse for conditional tags
	*/
	protected function parse_conditions($input)
	{
	$regexp1 = '/<roundcube:if\s+([^>]+)>/is';
	$regexp2 = '/<roundcube:(if\|elseif\|else\|endif)\s([^>])>/is';

	$pos = 0;

	// Find IF tags and process them
	while ($pos < strlen($input) && preg_match($regexp1, $input, $conditions, PREG_OFFSET_CAPTURE, $pos)) {
	$pos = $start = $conditions[0][1];

	// Process the 'condition' attribute
	$attrib = html::parse_attrib_string($conditions[1][0]);
	$condmet = isset($attrib['condition']) && $this->check_condition($attrib['condition']);

	// Define start/end position of the content to pass into the output
	$content_start = $condmet ? $pos + strlen($conditions[0][0]) : null;
	$content_end = null;

	$level = 0;
	$endif = null;
	$n = $pos + 1;

	// Process the code until the closing tag (for the processed IF tag)
	while (preg_match($regexp2, $input, $matches, PREG_OFFSET_CAPTURE, $n)) {
	$tag_start = $matches[0][1];
	$tag_end = $tag_start + strlen($matches[0][0]);
	$tag_name = strtolower($matches[1][0]);

	switch ($tag_name) {
	case 'if':
	$level++;
	break;

	case 'endif':
	if (!$level--) {
	$endif = $tag_end;
	if ($content_end === null) {
	$content_end = $tag_start;
	}
	break 2;
	}
	break;

	case 'elseif':
	if (!$level) {
	if ($condmet) {
	if ($content_end === null) {
	$content_end = $tag_start;
	}
	}
	else {
	// Process the 'condition' attribute
	$attrib = html::parse_attrib_string($matches[2][0]);
	$condmet = isset($attrib['condition']) && $this->check_condition($attrib['condition']);

	if ($condmet) {
	$content_start = $tag_end;
	}
	}
	}
	break;

	case 'else':
	if (!$level) {
	if ($condmet) {
	if ($content_end === null) {
	$content_end = $tag_start;
	}
	}
	else {
	$content_start = $tag_end;
	}
	}
	break;
	}

	$n = $tag_end;
	}

	// No ending tag found
	if ($endif === null) {
	$pos = strlen($input);
	if ($content_end === null) {
	$content_end = $pos;
	}
	}

	if ($content_start === null) {
	$content = '';
	}
	else {
	$content = substr($input, $content_start, $content_end - $content_start);
	}

	// Replace the whole IF statement with the output content
	$input = substr_replace($input, $content, $start, max($endif, $content_end, $pos) - $start);
	$pos = $start;
	}

	return $input;
	}

	/**
	* Determines if a given condition is met
	*
	* @param string $condition Condition statement
	*
	* @return bool True if condition is met, False if not
	* @todo Extend this to allow real conditions, not just "set"
	*/
	protected function check_condition($condition)
	{
	return $this->eval_expression($condition);
	}

	/**
	* Inserts hidden field with CSRF-prevention-token into POST forms
	*/
	protected function alter_form_tag($matches)
	{
	$out = $matches[0];
	$attrib = html::parse_attrib_string($matches[1]);

	if (!empty($attrib['method']) && strtolower($attrib['method']) == 'post') {
	$hidden = new html_hiddenfield(['name' => '_token', 'value' => $this->app->get_request_token()]);
	$out .= "\n" . $hidden->show();
	}

	return $out;
	}

	/**
	* Parse & evaluate a given expression and return its result.
	*
	* @param string $expression Expression statement
	*
	* @return mixed Expression result
	*/
	protected function eval_expression($expression)
	{
	$expression = preg_replace(
	[
	'/session:([a-z0-9_]+)/i',
	'/config:([a-z0-9_]+)(:([a-z0-9_]+))?/i',
	'/env:([a-z0-9_]+)/i',
	'/request:([a-z0-9_]+)/i',
	'/cookie:([a-z0-9_]+)/i',
	'/browser:([a-z0-9_]+)/i',
	'/template:name/i',
	],
	[
	"(isset(\$_SESSION['\\1']) ? \$_SESSION['\\1'] : null)",
	"\$this->app->config->get('\\1',rcube_utils::get_boolean('\\3'))",
	"(isset(\$this->env['\\1']) ? \$this->env['\\1'] : null)",
	"rcube_utils::get_input_value('\\1', rcube_utils::INPUT_GPC)",
	"(isset(\$_COOKIE['\\1']) ? \$_COOKIE['\\1'] : null)",
	"(isset(\$this->browser->{'\\1'}) ? \$this->browser->{'\\1'} : null)",
	"'{$this->template_name}'",
	],
	$expression
	);

	// Note: We used create_function() before but it's deprecated in PHP 7.2
	// and really it was just a wrapper on eval().
	return eval("return ($expression);");
	}

	/**
	* Parse variable strings
	*
	* @param string $type Variable type (env, config etc)
	* @param string $name Variable name
	*
	* @return mixed Variable value
	*/
	protected function parse_variable($type, $name)
	{
	$value = '';

	switch ($type) {
	case 'env':
	$value = isset($this->env[$name]) ? $this->env[$name] : null;
	break;
	case 'config':
	$value = $this->config->get($name);
	if (is_array($value) && !empty($value[$_SESSION['storage_host']])) {
	$value = $value[$_SESSION['storage_host']];
	}
	break;
	case 'request':
	$value = rcube_utils::get_input_value($name, rcube_utils::INPUT_GPC);
	break;
	case 'session':
	$value = isset($_SESSION[$name]) ? $_SESSION[$name] : '';
	break;
	case 'cookie':
	$value = htmlspecialchars($_COOKIE[$name], ENT_COMPAT \| ENT_HTML401, RCUBE_CHARSET);
	break;
	case 'browser':
	$value = isset($this->browser->{$name}) ? $this->browser->{$name} : '';
	break;
	}

	return $value;
	}

	/**
	* Search for special tags in input and replace them
	* with the appropriate content
	*
	* @param string $input Input string to parse
	*
	* @return string Altered input string
	* @todo Use DOM-parser to traverse template HTML
	* @todo Maybe a cache.
	*/
	protected function parse_xml($input)
	{
	$regexp = '/<roundcube:([-_a-z]+)\s+((?:[^>]\|\\\\>)+)(?<!\\\\)>/Ui';

	return preg_replace_callback($regexp, [$this, 'xml_command'], $input);
	}

	/**
	* Callback function for parsing an xml command tag
	* and turn it into real html content
	*
	* @param array $matches Matches array of preg_replace_callback
	*
	* @return string Tag/Object content
	*/
	protected function xml_command($matches)
	{
	$command = strtolower($matches[1]);
	$attrib = html::parse_attrib_string($matches[2]);

	// empty output if required condition is not met
	if (!empty($attrib['condition']) && !$this->check_condition($attrib['condition'])) {
	return '';
	}

	// localize title and summary attributes
	if ($command != 'button' && !empty($attrib['title']) && $this->app->text_exists($attrib['title'])) {
	$attrib['title'] = $this->app->gettext($attrib['title']);
	}
	if ($command != 'button' && !empty($attrib['summary']) && $this->app->text_exists($attrib['summary'])) {
	$attrib['summary'] = $this->app->gettext($attrib['summary']);
	}

	// execute command
	switch ($command) {
	// return a button
	case 'button':
	if (!empty($attrib['name']) \|\| !empty($attrib['command'])) {
	return $this->button($attrib);
	}
	break;

	// frame
	case 'frame':
	return $this->frame($attrib);
	break;

	// show a label
	case 'label':
	if (!empty($attrib['expression'])) {
	$attrib['name'] = $this->eval_expression($attrib['expression']);
	}

	if (!empty($attrib['name']) \|\| !empty($attrib['command'])) {
	$vars = $attrib + ['product' => $this->config->get('product_name')];
	unset($vars['name'], $vars['command']);

	$label = $this->app->gettext($attrib + ['vars' => $vars]);
	$quoting = null;

	if (!empty($attrib['quoting'])) {
	$quoting = strtolower($attrib['quoting']);
	}
	else if (isset($attrib['html'])) {
	$quoting = rcube_utils::get_boolean((string) $attrib['html']) ? 'no' : '';
	}

	// 'noshow' can be used in skins to define new labels
	if (!empty($attrib['noshow'])) {
	return '';
	}

	switch ($quoting) {
	case 'no':
	case 'raw':
	break;
	case 'javascript':
	case 'js':
	$label = rcube::JQ($label);
	break;
	default:
	$label = html::quote($label);
	break;
	}

	return $label;
	}
	break;

	case 'add_label':
	$this->add_label($attrib['name']);
	break;

	// include a file
	case 'include':
	if (!empty($attrib['condition']) && !$this->check_condition($attrib['condition'])) {
	break;
	}

	if ($attrib['file'][0] != '/') {
	$attrib['file'] = '/templates/' . $attrib['file'];
	}

	$old_base_path = $this->base_path;
	$include = '';
	$attr_skin_path = !empty($attrib['skinpath']) ? $attrib['skinpath'] : null;

	if (!empty($attrib['skin_path'])) {
	$attr_skin_path = $attrib['skin_path'];
	}

	if ($path = $this->get_skin_file($attrib['file'], $skin_path, $attr_skin_path)) {
	// set base_path to core skin directory (not plugin's skin)
	$this->base_path = preg_replace('!plugins/\w+/!', '', $skin_path);
	$path = realpath(RCUBE_INSTALL_PATH . $path);
	}

	if (is_readable($path)) {
	$allow_php = $this->config->get('skin_include_php');
	$include = $allow_php ? $this->include_php($path) : file_get_contents($path);
	$include = $this->parse_conditions($include);
	$include = $this->parse_xml($include);
	$include = $this->fix_paths($include);
	}

	$this->base_path = $old_base_path;

	return $include;

	case 'plugin.include':
	$hook = $this->app->plugins->exec_hook("template_plugin_include", $attrib + ['content' => '']);
	return $hook['content'];

	// define a container block
	case 'container':
	if (!empty($attrib['name']) && !empty($attrib['id'])) {
	$this->command('gui_container', $attrib['name'], $attrib['id']);
	// let plugins insert some content here
	$hook = $this->app->plugins->exec_hook("template_container", $attrib + ['content' => '']);
	return $hook['content'];
	}
	break;

	// return code for a specific application object
	case 'object':
	$object = strtolower($attrib['name']);
	$content = '';
	$handler = null;

	// correct deprecated object names
	if (!empty($this->deprecated_template_objects[$object])) {
	$object = $this->deprecated_template_objects[$object];
	}

	if (!empty($this->object_handlers[$object])) {
	$handler = $this->object_handlers[$object];
	}

	// execute object handler function
	if (is_callable($handler)) {
	$this->prepare_object_attribs($attrib);

	// We assume that objects with src attribute are internal (in most
	// cases this is a watermark frame). We need this to make sure assets_path
	// is added to the internal assets paths
	$external = empty($attrib['src']);
	$content = call_user_func($handler, $attrib);
	}
	else if ($object == 'doctype') {
	$content = html::doctype($attrib['value']);
	}
	else if ($object == 'logo') {
	$attrib += ['alt' => $this->xml_command(['', 'object', 'name="productname"'])];

	// 'type' attribute added in 1.4 was renamed 'logo-type' in 1.5
	// check both for backwards compatibility
	$logo_type = !empty($attrib['logo-type']) ? $attrib['logo-type'] : null;
	$logo_match = !empty($attrib['logo-match']) ? $attrib['logo-match'] : null;
	if (!empty($attrib['type']) && empty($logo_type)) {
	$logo_type = $attrib['type'];
	}

	if (($template_logo = $this->get_template_logo($logo_type, $logo_match)) !== null) {
	$attrib['src'] = $template_logo;
	}

	$additional_logos = [];
	$logo_types = (array) $this->config->get('additional_logo_types');

	foreach ($logo_types as $type) {
	if (($template_logo = $this->get_template_logo($type)) !== null) {
	$additional_logos[$type] = $this->abs_url($template_logo);
	}
	}

	if (!empty($additional_logos)) {
	$this->set_env('additional_logos', $additional_logos);
	}

	if (!empty($attrib['src'])) {
	$content = html::img($attrib);
	}
	}
	else if ($object == 'productname') {
	$name = $this->config->get('product_name', 'Roundcube Webmail');
	$content = html::quote($name);
	}
	else if ($object == 'version') {
	$ver = (string) RCMAIL_VERSION;
	if (is_file(RCUBE_INSTALL_PATH . '.svn/entries')) {
	if (preg_match('/Revision:\s(\d+)/', @shell_exec('svn info'), $regs))
	$ver .= ' [SVN r'.$regs[1].']';
	}
	else if (is_file(RCUBE_INSTALL_PATH . '.git/index')) {
	if (preg_match('/Date:\s+([^\n]+)/', @shell_exec('git log -1'), $regs)) {
	if ($date = date('Ymd.Hi', strtotime($regs[1]))) {
	$ver .= ' [GIT '.$date.']';
	}
	}
	}
	$content = html::quote($ver);
	}
	else if ($object == 'steptitle') {
	$content = html::quote($this->get_pagetitle(false));
	}
	else if ($object == 'pagetitle') {
	// Deprecated, <title> will be added automatically
	$content = html::quote($this->get_pagetitle());
	}
	else if ($object == 'contentframe') {
	if (empty($attrib['id'])) {
	$attrib['id'] = 'rcm' . $this->env['task'] . 'frame';
	}

	// parse variables
	if (preg_match('/^(config\|env):([a-z0-9_]+)$/i', $attrib['src'], $matches)) {
	$attrib['src'] = $this->parse_variable($matches[1], $matches[2]);
	}

	$content = $this->frame($attrib, true);
	}
	else if ($object == 'meta' \|\| $object == 'links') {
	if ($object == 'meta') {
	$source = 'meta_tags';
	$tag = 'meta';
	$key = 'name';
	$param = 'content';
	}
	else {
	$source = 'link_tags';
	$tag = 'link';
	$key = 'rel';
	$param = 'href';
	}

	foreach ($this->$source as $name => $vars) {
	// $vars can be in many forms:
	// - string
	// - array('key' => 'val')
	// - array(string, string)
	// - array(array(), string)
	// - array(array('key' => 'val'), array('key' => 'val'))
	// normalise this for processing by checking for string array keys
	$vars = is_array($vars) ? (count(array_filter(array_keys($vars), 'is_string')) > 0 ? [$vars] : $vars) : [$vars];

	foreach ($vars as $args) {
	// skip unset headers e.g. when extending a skin and removing a header defined in the parent
	if ($args === false) {
	continue;
	}

	$args = is_array($args) ? $args : [$param => $args];

	// special handling for favicon
	if ($object == 'links' && $name == 'shortcut icon' && empty($args[$param])) {
	if ($href = $this->get_template_logo('favicon')) {
	$args[$param] = $href;
	}
	else if ($href = $this->config->get('favicon', '/images/favicon.ico')) {
	$args[$param] = $href;
	}
	}

	$content .= html::tag($tag, [$key => $name, 'nl' => true] + $args);
	}
	}
	}

	// exec plugin hooks for this template object
	$hook = $this->app->plugins->exec_hook("template_object_$object", $attrib + ['content' => (string) $content]);

	if (strlen($hook['content']) && !empty($external)) {
	$object_id = uniqid('TEMPLOBJECT:', true);
	$this->objects[$object_id] = $hook['content'];
	$hook['content'] = $object_id;
	}

	return $hook['content'];

	// return <link> element
	case 'link':
	if ($attrib['condition'] && !$this->check_condition($attrib['condition'])) {
	break;
	}

	unset($attrib['condition']);

	return html::tag('link', $attrib);


	// return code for a specified eval expression
	case 'exp':
	return html::quote($this->eval_expression($attrib['expression']));

	// return variable
	case 'var':
	$var = explode(':', $attrib['name']);
	$value = $this->parse_variable($var[0], $var[1]);

	if (is_array($value)) {
	$value = implode(', ', $value);
	}

	return html::quote($value);

	case 'form':
	return $this->form_tag($attrib);
	}

	return '';
	}

	/**
	* Prepares template object attributes
	*
	* @param array &$attribs Attributes
	*/
	protected function prepare_object_attribs(&$attribs)
	{
	foreach ($attribs as $key => &$value) {
	if (strpos($key, 'data-label-') === 0) {
	// Localize data-label-* attributes
	$value = $this->app->gettext($value);
	}
	elseif ($key[0] == ':') {
	// Evaluate attributes with expressions and remove special character from attribute name
	$attribs[substr($key, 1)] = $this->eval_expression($value);
	unset($attribs[$key]);
	}
	}
	}

	/**
	* Include a specific file and return it's contents
	*
	* @param string $file File path
	*
	* @return string Contents of the processed file
	*/
	protected function include_php($file)
	{
	ob_start();
	include $file;
	$out = ob_get_contents();
	ob_end_clean();

	return $out;
	}

	/**
	* Put objects' content back into template output
	*/
	protected function postrender($output)
	{
	// insert objects' contents
	foreach ($this->objects as $key => $val) {
	$output = str_replace($key, $val, $output, $count);
	if ($count) {
	$this->objects[$key] = null;
	}
	}

	// make sure all <form> tags have a valid request token
	$output = preg_replace_callback('/<form\s+([^>]+)>/Ui', [$this, 'alter_form_tag'], $output);

	return $output;
	}

	/**
	* Create and register a button
	*
	* @param array $attrib Named button attributes
	*
	* @return string HTML button
	* @todo Remove all inline JS calls and use jQuery instead.
	* @todo Remove all sprintf()'s - they are pretty, but also slow.
	*/
	public function button($attrib)
	{
	static $s_button_count = 100;

	// these commands can be called directly via url
	$a_static_commands = ['compose', 'list', 'preferences', 'folders', 'identities'];

	if (empty($attrib['command']) && empty($attrib['name']) && empty($attrib['href'])) {
	return '';
	}

	$command = !empty($attrib['command']) ? $attrib['command'] : null;
	$action = $command ?: (!empty($attrib['name']) ? $attrib['name'] : null);

	if (!empty($attrib['task'])) {
	$command = $attrib['task'] . '.' . $command;
	$element = $attrib['task'] . '.' . $action;
	}
	else {
	$element = (!empty($this->env['task']) ? $this->env['task'] . '.' : '') . $action;
	}

	$disabled_actions = (array) $this->config->get('disabled_actions');

	// remove buttons for disabled actions
	if (in_array($element, $disabled_actions) \|\| in_array($action, $disabled_actions)) {
	return '';
	}

	// try to find out the button type
	if (!empty($attrib['type'])) {
	$attrib['type'] = strtolower($attrib['type']);
	if (strpos($attrib['type'], '-menuitem')) {
	$attrib['type'] = substr($attrib['type'], 0, -9);
	$menuitem = true;
	}
	}
	else if (!empty($attrib['image']) \|\| !empty($attrib['imagepas']) \|\| !empty($attrib['imageact'])) {
	$attrib['type'] = 'image';
	}
	else {
	$attrib['type'] = 'button';
	}

	if (empty($attrib['image'])) {
	if (!empty($attrib['imagepas'])) {
	$attrib['image'] = $attrib['imagepas'];
	}
	else if (!empty($attrib['imageact'])) {
	$attrib['image'] = $attrib['imageact'];
	}
	}

	if (empty($attrib['id'])) {
	// ensure auto generated IDs are unique between main window and content frame
	// Elastic skin duplicates buttons between the two on smaller screens (#7618)
	$prefix = ($this->framed \|\| !empty($this->env['framed'])) ? 'frm' : '';
	$attrib['id'] = sprintf('rcmbtn%s%d', $prefix, $s_button_count++);
	}

	// get localized text for labels and titles
	$domain = !empty($attrib['domain']) ? $attrib['domain'] : null;
	if (!empty($attrib['title'])) {
	$attrib['title'] = html::quote($this->app->gettext($attrib['title'], $domain));
	}
	if (!empty($attrib['label'])) {
	$attrib['label'] = html::quote($this->app->gettext($attrib['label'], $domain));
	}
	if (!empty($attrib['alt'])) {
	$attrib['alt'] = html::quote($this->app->gettext($attrib['alt'], $domain));
	}

	// set accessibility attributes
	if (empty($attrib['role'])) {
	$attrib['role'] = 'button';
	}

	if (!empty($attrib['class']) && !empty($attrib['classact']) \|\| !empty($attrib['imagepas']) && !empty($attrib['imageact'])) {
	if (array_key_exists('tabindex', $attrib)) {
	$attrib['data-tabindex'] = $attrib['tabindex'];
	}
	$attrib['tabindex'] = '-1'; // disable button by default
	$attrib['aria-disabled'] = 'true';
	}

	// set title to alt attribute for IE browsers
	if ($this->browser->ie && empty($attrib['title']) && !empty($attrib['alt'])) {
	$attrib['title'] = $attrib['alt'];
	}

	// add empty alt attribute for XHTML compatibility
	if (!isset($attrib['alt'])) {
	$attrib['alt'] = '';
	}

	// register button in the system
	if (!empty($attrib['command'])) {
	$this->add_script(sprintf(
	"%s.register_button('%s', '%s', '%s', '%s', '%s', '%s');",
	self::JS_OBJECT_NAME,
	$command,
	$attrib['id'],
	$attrib['type'],
	!empty($attrib['imageact']) ? $this->abs_url($attrib['imageact']) : (!empty($attrib['classact']) ? $attrib['classact'] : ''),
	!empty($attrib['imagesel']) ? $this->abs_url($attrib['imagesel']) : (!empty($attrib['classsel']) ? $attrib['classsel'] : ''),
	!empty($attrib['imageover']) ? $this->abs_url($attrib['imageover']) : ''
	));

	// make valid href to specific buttons
	if (in_array($attrib['command'], rcmail::$main_tasks)) {
	$attrib['href'] = $this->app->url(['task' => $attrib['command']]);
	$attrib['onclick'] = sprintf("return %s.command('switch-task','%s',this,event)", self::JS_OBJECT_NAME, $attrib['command']);
	}
	else if (!empty($attrib['task']) && in_array($attrib['task'], rcmail::$main_tasks)) {
	$attrib['href'] = $this->app->url(['action' => $attrib['command'], 'task' => $attrib['task']]);
	}
	else if (in_array($attrib['command'], $a_static_commands)) {
	$attrib['href'] = $this->app->url(['action' => $attrib['command']]);
	}
	else if (($attrib['command'] == 'permaurl' \|\| $attrib['command'] == 'extwin') && !empty($this->env['permaurl'])) {
	$attrib['href'] = $this->env['permaurl'];
	}
	}

	// overwrite attributes
	if (empty($attrib['href'])) {
	$attrib['href'] = '#';
	}

	if (!empty($attrib['task'])) {
	if (!empty($attrib['classact'])) {
	$attrib['class'] = $attrib['classact'];
	}
	}
	else if ($command && empty($attrib['onclick'])) {
	$attrib['onclick'] = sprintf(
	"return %s.command('%s','%s',this,event)",
	self::JS_OBJECT_NAME,
	$command,
	!empty($attrib['prop']) ? $attrib['prop'] : ''
	);
	}

	$out = '';
	$btn_content = null;
	$link_attrib = [];

	// generate image tag
	if ($attrib['type'] == 'image') {
	$attrib_str = html::attrib_string(
	$attrib,
	[
	'style', 'class', 'id', 'width', 'height', 'border', 'hspace',
	'vspace', 'align', 'alt', 'tabindex', 'title'
	]
	);
	$btn_content = sprintf('<img src="%s"%s />', $this->abs_url($attrib['image']), $attrib_str);
	if (!empty($attrib['label'])) {
	$btn_content .= ' '.$attrib['label'];
	}
	$link_attrib = ['href', 'onclick', 'onmouseover', 'onmouseout', 'onmousedown', 'onmouseup', 'target'];
	}
	else if ($attrib['type'] == 'link') {
	$btn_content = isset($attrib['content']) ? $attrib['content'] : (!empty($attrib['label']) ? $attrib['label'] : $attrib['command']);
	$link_attrib = array_merge(html::$common_attrib, ['href', 'onclick', 'tabindex', 'target', 'rel']);
	if (!empty($attrib['innerclass'])) {
	$btn_content = html::span($attrib['innerclass'], $btn_content);
	}
	}
	else if ($attrib['type'] == 'input') {
	$attrib['type'] = 'button';

	if (!empty($attrib['label'])) {
	$attrib['value'] = $attrib['label'];
	}
	if (!empty($attrib['command'])) {
	$attrib['disabled'] = 'disabled';
	}

	$out = html::tag('input', $attrib, null, ['type', 'value', 'onclick', 'id', 'class', 'style', 'tabindex', 'disabled']);
	}
	else {
	if (!empty($attrib['label'])) {
	$attrib['value'] = $attrib['label'];
	}
	if (!empty($attrib['command'])) {
	$attrib['disabled'] = 'disabled';
	}

	$content = isset($attrib['content']) ? $attrib['content'] : $attrib['label'];
	$out = html::tag('button', $attrib, $content, ['type', 'value', 'onclick', 'id', 'class', 'style', 'tabindex', 'disabled']);
	}

	// generate html code for button
	if ($btn_content) {
	$attrib_str = html::attrib_string($attrib, $link_attrib);
	$out = sprintf('<a%s>%s</a>', $attrib_str, $btn_content);
	}

	if (!empty($attrib['wrapper'])) {
	$out = html::tag($attrib['wrapper'], null, $out);
	}

	if (!empty($menuitem)) {
	$class = !empty($attrib['menuitem-class']) ? ' class="' . $attrib['menuitem-class'] . '"' : '';
	$out = '<li role="menuitem"' . $class . '>' . $out . '</li>';
	}

	return $out;
	}

	/**
	* Link an external script file
	*
	* @param string $file File URL
	* @param string $position Target position [head\|head_bottom\|foot]
	*/
	public function include_script($file, $position = 'head', $add_path = true)
	{
	if ($add_path && !preg_match('\|^https?://\|i', $file) && $file[0] != '/') {
	$file = $this->file_mod($this->scripts_path . $file);
	}

	if (!isset($this->script_files[$position]) \|\| !is_array($this->script_files[$position])) {
	$this->script_files[$position] = [];
	}

	if (!in_array($file, $this->script_files[$position])) {
	$this->script_files[$position][] = $file;
	}
	}

	/**
	* Add inline javascript code
	*
	* @param string $script JS code snippet
	* @param string $position Target position [head\|head_top\|foot\|docready]
	*/
	public function add_script($script, $position = 'head')
	{
	if (!isset($this->scripts[$position])) {
	$this->scripts[$position] = rtrim($script);
	}
	else {
	$this->scripts[$position] .= "\n" . rtrim($script);
	}
	}

	/**
	* Link an external css file
	*
	* @param string $file File URL
	*/
	public function include_css($file)
	{
	$this->css_files[] = $file;
	}

	/**
	* Add HTML code to the page header
	*
	* @param string $str HTML code
	*/
	public function add_header($str)
	{
	$this->header .= "\n" . $str;
	}

	/**
	* Add HTML code to the page footer
	* To be added right before </body>
	*
	* @param string $str HTML code
	*/
	public function add_footer($str)
	{
	$this->footer .= "\n" . $str;
	}

	/**
	* Process template and write to stdOut
	*
	* @param string $output HTML output
	*/
	protected function _write($output = '')
	{
	$output = trim($output);

	if (empty($output)) {
	$output = html::doctype('html5') . "\n" . $this->default_template;
	$is_empty = true;
	}

	$merge_script_files = function($output, $script) {
	return $output . html::script($script);
	};

	$merge_scripts = function($output, $script) {
	return $output . html::script([], $script);
	};

	// put docready commands into page footer
	if (!empty($this->scripts['docready'])) {
	$this->add_script("\$(function() {\n" . $this->scripts['docready'] . "\n});", 'foot');
	}

	$page_header = '';
	$page_footer = '';
	$meta = '';

	// declare page language
	if (!empty($_SESSION['language'])) {
	$lang = substr($_SESSION['language'], 0, 2);
	$output = preg_replace('/<html/', '<html lang="' . html::quote($lang) . '"', $output, 1);

	if (!headers_sent()) {
	$this->header('Content-Language: ' . $lang);
	}
	}

	// include meta tag with charset
	if (!empty($this->charset)) {
	if (!headers_sent()) {
	$this->header('Content-Type: text/html; charset=' . $this->charset);
	}

	$meta .= html::tag('meta', [
	'http-equiv' => 'content-type',
	'content' => "text/html; charset={$this->charset}",
	'nl' => true
	]);
	}

	// include page title (after charset specification)
	$meta .= '<title>' . html::quote($this->get_pagetitle()) . "</title>\n";

	$output = preg_replace('/(<head[^>]>)\n/i', "\\1\n{$meta}", $output, 1, $count);
	if (!$count) {
	$page_header .= $meta;
	}

	// include scripts into header/footer
	if (!empty($this->script_files['head'])) {
	$page_header .= array_reduce((array) $this->script_files['head'], $merge_script_files);
	}

	$head = isset($this->scripts['head_top']) ? $this->scripts['head_top'] : '';
	$head .= isset($this->scripts['head']) ? $this->scripts['head'] : '';

	$page_header .= array_reduce((array) $head, $merge_scripts);
	$page_header .= $this->header . "\n";

	if (!empty($this->script_files['head_bottom'])) {
	$page_header .= array_reduce((array) $this->script_files['head_bottom'], $merge_script_files);
	}

	if (!empty($this->script_files['foot'])) {
	$page_footer .= array_reduce((array) $this->script_files['foot'], $merge_script_files);
	}

	$page_footer .= $this->footer . "\n";

	if (!empty($this->scripts['foot'])) {
	$page_footer .= array_reduce((array) $this->scripts['foot'], $merge_scripts);
	}

	// find page header
	if ($hpos = stripos($output, '</head>')) {
	$page_header .= "\n";
	}
	else {
	if (!is_numeric($hpos)) {
	$hpos = stripos($output, '<body');
	}
	if (!is_numeric($hpos) && ($hpos = stripos($output, '<html'))) {
	while ($output[$hpos] != '>') {
	$hpos++;
	}
	$hpos++;
	}
	$page_header = "<head>\n$page_header\n</head>\n";
	}

	// add page header
	if ($hpos) {
	$output = substr_replace($output, $page_header, $hpos, 0);
	}
	else {
	$output = $page_header . $output;
	}

	// add page footer
	if (($fpos = strripos($output, '</body>')) \|\| ($fpos = strripos($output, '</html>'))) {
	// for Elastic: put footer content before "footer scripts"
	while (($npos = strripos($output, "\n", -strlen($output) + $fpos - 1))
	&& $npos != $fpos
	&& ($chunk = substr($output, $npos, $fpos - $npos)) !== ''
	&& (trim($chunk) === '' \|\| preg_match('/\s<script[^>]+><\/script>\s/', $chunk))
	) {
	$fpos = $npos;
	}

	$output = substr_replace($output, $page_footer."\n", $fpos, 0);
	}
	else {
	$output .= "\n".$page_footer;
	}

	// add css files in head, before scripts, for speed up with parallel downloads
	if (!empty($this->css_files) && empty($is_empty)
	&& (($pos = stripos($output, '<script ')) \|\| ($pos = stripos($output, '</head>')))
	) {
	$css = '';
	foreach ($this->css_files as $file) {
	$is_less = substr_compare($file, '.less', -5, 5, true) === 0;
	$css .= html::tag('link', [
	'rel' => $is_less ? 'stylesheet/less' : 'stylesheet',
	'type' => 'text/css',
	'href' => $file,
	'nl' => true,
	]);
	}
	$output = substr_replace($output, $css, $pos, 0);
	}

	$output = $this->parse_with_globals($this->fix_paths($output));

	if ($this->assets_path) {
	$output = $this->fix_assets_paths($output);
	}

	$output = $this->postrender($output);

	// trigger hook with final HTML content to be sent
	$hook = $this->app->plugins->exec_hook("send_page", ['content' => $output]);
	if (!$hook['abort']) {
	if ($this->charset != RCUBE_CHARSET) {
	echo rcube_charset::convert($hook['content'], RCUBE_CHARSET, $this->charset);
	}
	else {
	echo $hook['content'];
	}
	}
	}

	/**
	* Returns iframe object, registers some related env variables
	*
	* @param array $attrib HTML attributes
	* @param bool $is_contentframe Register this iframe as the 'contentframe' gui object
	*
	* @return string IFRAME element
	*/
	public function frame($attrib, $is_contentframe = false)
	{
	static $idcount = 0;

	if (empty($attrib['id'])) {
	$attrib['id'] = 'rcmframe' . ++$idcount;
	}

	$attrib['name'] = $attrib['id'];
	$attrib['src'] = !empty($attrib['src']) ? $this->abs_url($attrib['src'], true) : 'about:blank';

	// register as 'contentframe' object
	if ($is_contentframe \|\| !empty($attrib['contentframe'])) {
	$this->set_env('contentframe', !empty($attrib['contentframe']) ? $attrib['contentframe'] : $attrib['name']);
	}

	return html::iframe($attrib);
	}


	/* *********** common functions delivering gui objects ************ */

	/**
	* Create a form tag with the necessary hidden fields
	*
	* @param array $attrib Named tag parameters
	* @param string $content HTML content of the form
	*
	* @return string HTML code for the form
	*/
	public function form_tag($attrib, $content = null)
	{
	$hidden = '';

	if (!empty($this->env['extwin'])) {
	$hiddenfield = new html_hiddenfield(['name' => '_extwin', 'value' => '1']);
	$hidden = $hiddenfield->show();
	}
	else if ($this->framed \|\| !empty($this->env['framed'])) {
	$hiddenfield = new html_hiddenfield(['name' => '_framed', 'value' => '1']);
	$hidden = $hiddenfield->show();
	}

	if (!$content) {
	$attrib['noclose'] = true;
	}

	return html::tag('form',
	$attrib + ['action' => $this->app->comm_path, 'method' => 'get'],
	$hidden . $content,
	['id', 'class', 'style', 'name', 'method', 'action', 'enctype', 'onsubmit']
	);
	}

	/**
	* Build a form tag with a unique request token
	*
	* @param array $attrib Named tag parameters including 'action' and 'task' values
	* which will be put into hidden fields
	* @param string $content Form content
	*
	* @return string HTML code for the form
	*/
	public function request_form($attrib, $content = '')
	{
	$hidden = new html_hiddenfield();

	if (!empty($attrib['task'])) {
	$hidden->add(['name' => '_task', 'value' => $attrib['task']]);
	}

	if (!empty($attrib['action'])) {
	$hidden->add(['name' => '_action', 'value' => $attrib['action']]);
	}

	// we already have a <form> tag
	if (!empty($attrib['form'])) {
	if ($this->framed \|\| !empty($this->env['framed'])) {
	$hidden->add(['name' => '_framed', 'value' => '1']);
	}

	return $hidden->show() . $content;
	}

	unset($attrib['task'], $attrib['request']);
	$attrib['action'] = './';

	return $this->form_tag($attrib, $hidden->show() . $content);
	}

	/**
	* GUI object 'username'
	* Showing IMAP username of the current session
	*
	* @param array $attrib Named tag parameters (currently not used)
	*
	* @return string HTML code for the gui object
	*/
	public function current_username($attrib)
	{
	static $username;

	// already fetched
	if (!empty($username)) {
	return $username;
	}

	// Current username is an e-mail address
	if (isset($_SESSION['username']) && strpos($_SESSION['username'], '@')) {
	$username = $_SESSION['username'];
	}
	// get e-mail address from default identity
	else if ($sql_arr = $this->app->user->get_identity()) {
	$username = $sql_arr['email'];
	}
	else {
	$username = $this->app->user->get_username();
	}

	$username = rcube_utils::idn_to_utf8($username);

	return html::quote($username);
	}

	/**
	* GUI object 'loginform'
	* Returns code for the webmail login form
	*
	* @param array $attrib Named parameters
	*
	* @return string HTML code for the gui object
	*/
	protected function login_form($attrib)
	{
	$default_host = $this->config->get('default_host');
	$autocomplete = (int) $this->config->get('login_autocomplete');
	$username_filter = $this->config->get('login_username_filter');
	$_SESSION['temp'] = true;

	// save original url
	$url = rcube_utils::get_input_value('_url', rcube_utils::INPUT_POST);
	if (
	empty($url)
	&& !empty($_SERVER['QUERY_STRING'])
	&& !preg_match('/_(task\|action)=logout/', $_SERVER['QUERY_STRING'])
	) {
	$url = $_SERVER['QUERY_STRING'];
	}

	// Disable autocapitalization on iPad/iPhone (#1488609)
	$attrib['autocapitalize'] = 'off';

	$form_name = !empty($attrib['form']) ? $attrib['form'] : 'form';

	// set autocomplete attribute
	$user_attrib = $autocomplete > 0 ? [] : ['autocomplete' => 'off'];
	$host_attrib = $autocomplete > 0 ? [] : ['autocomplete' => 'off'];
	$pass_attrib = $autocomplete > 1 ? [] : ['autocomplete' => 'off'];

	if ($username_filter && strtolower($username_filter) == 'email') {
	$user_attrib['type'] = 'email';
	}

	$input_task = new html_hiddenfield(['name' => '_task', 'value' => 'login']);
	$input_action = new html_hiddenfield(['name' => '_action', 'value' => 'login']);
	$input_tzone = new html_hiddenfield(['name' => '_timezone', 'id' => 'rcmlogintz', 'value' => '_default_']);
	$input_url = new html_hiddenfield(['name' => '_url', 'id' => 'rcmloginurl', 'value' => $url]);
	$input_user = new html_inputfield(['name' => '_user', 'id' => 'rcmloginuser', 'required' => 'required']
	+ $attrib + $user_attrib);
	$input_pass = new html_passwordfield(['name' => '_pass', 'id' => 'rcmloginpwd', 'required' => 'required']
	+ $attrib + $pass_attrib);
	$input_host = null;
	$hide_host = false;

	if (is_array($default_host) && count($default_host) > 1) {
	$input_host = new html_select(['name' => '_host', 'id' => 'rcmloginhost', 'class' => 'custom-select']);

	foreach ($default_host as $key => $value) {
	if (!is_array($value)) {
	$input_host->add($value, (is_numeric($key) ? $value : $key));
	}
	else {
	$input_host = null;
	break;
	}
	}
	}
	else if (is_array($default_host) && ($host = key($default_host)) !== null) {
	$hide_host = true;
	$input_host = new html_hiddenfield([
	'name' => '_host', 'id' => 'rcmloginhost', 'value' => is_numeric($host) ? $default_host[$host] : $host] + $attrib);
	}
	else if (empty($default_host)) {
	$input_host = new html_inputfield(['name' => '_host', 'id' => 'rcmloginhost', 'class' => 'form-control']
	+ $attrib + $host_attrib);
	}

	$this->add_gui_object('loginform', $form_name);

	// create HTML table with two cols
	$table = new html_table(['cols' => 2]);

	$table->add('title', html::label('rcmloginuser', html::quote($this->app->gettext('username'))));
	$table->add('input', $input_user->show(rcube_utils::get_input_value('_user', rcube_utils::INPUT_GPC)));

	$table->add('title', html::label('rcmloginpwd', html::quote($this->app->gettext('password'))));
	$table->add('input', $input_pass->show());

	// add host selection row
	if (is_object($input_host) && !$hide_host) {
	$table->add('title', html::label('rcmloginhost', html::quote($this->app->gettext('server'))));
	$table->add('input', $input_host->show(rcube_utils::get_input_value('_host', rcube_utils::INPUT_GPC)));
	}

	$out = $input_task->show();
	$out .= $input_action->show();
	$out .= $input_tzone->show();
	$out .= $input_url->show();
	$out .= $table->show();

	if ($hide_host) {
	$out .= $input_host->show();
	}

	if (rcube_utils::get_boolean($attrib['submit'])) {
	$button_attr = ['type' => 'submit', 'id' => 'rcmloginsubmit', 'class' => 'button mainaction submit'];
	$out .= html::p('formbuttons', html::tag('button', $button_attr, $this->app->gettext('login')));
	}

	// add oauth login button
	if ($this->config->get('oauth_auth_uri') && $this->config->get('oauth_provider')) {
	// hide login form fields when `oauth_login_redirect` is configured
	if ($this->config->get('oauth_login_redirect')) {
	$out = '';
	}

	$link_attr = ['href' => $this->app->url(['action' => 'oauth']), 'id' => 'rcmloginoauth', 'class' => 'button oauth ' . $this->config->get('oauth_provider')];
	$out .= html::p('oauthlogin', html::a($link_attr, $this->app->gettext(['name' => 'oauthlogin', 'vars' => ['provider' => $this->config->get('oauth_provider_name', 'OAuth')]])));
	}

	// surround html output with a form tag
	if (empty($attrib['form'])) {
	$out = $this->form_tag(['name' => $form_name, 'method' => 'post'], $out);
	}

	// include script for timezone detection
	$this->include_script('jstz.min.js');

	return $out;
	}

	/**
	* GUI object 'preloader'
	* Loads javascript code for images preloading
	*
	* @param array $attrib Named parameters
	* @return void
	*/
	protected function preloader($attrib)
	{
	$images = preg_split('/[\s\t\n,]+/', $attrib['images'], -1, PREG_SPLIT_NO_EMPTY);
	$images = array_map([$this, 'abs_url'], $images);
	$images = array_map([$this, 'asset_url'], $images);

	if (empty($images) \|\| $_REQUEST['_task'] == 'logout') {
	return;
	}

	$this->add_script('var images = ' . self::json_serialize($images, $this->devel_mode) .';
	for (var i=0; i<images.length; i++) {
	img = new Image();
	img.src = images[i];
	}', 'docready');
	}

	/**
	* GUI object 'searchform'
	* Returns code for search function
	*
	* @param array $attrib Named parameters
	*
	* @return string HTML code for the gui object
	*/
	public function search_form($attrib)
	{
	// add some labels to client
	$this->add_label('searching');

	$attrib['name'] = '_q';
	$attrib['class'] = trim((!empty($attrib['class']) ? $attrib['class'] : '') . ' no-bs');

	if (empty($attrib['id'])) {
	$attrib['id'] = 'rcmqsearchbox';
	}
	if (isset($attrib['type']) && $attrib['type'] == 'search' && !$this->browser->khtml) {
	unset($attrib['type'], $attrib['results']);
	}
	if (empty($attrib['placeholder'])) {
	$attrib['placeholder'] = $this->app->gettext('searchplaceholder');
	}

	$label = html::label(['for' => $attrib['id'], 'class' => 'voice'], rcube::Q($this->app->gettext('arialabelsearchterms')));
	$input_q = new html_inputfield($attrib);
	$out = $label . $input_q->show();
	$name = 'qsearchbox';

	// Support for multiple searchforms on the same page
	if (isset($attrib['gui-object']) && $attrib['gui-object'] !== false && $attrib['gui-object'] !== 'false') {
	$name = $attrib['gui-object'];
	}

	$this->add_gui_object($name, $attrib['id']);

	// add form tag around text field
	if (empty($attrib['form']) && empty($attrib['no-form'])) {
	$out = $this->form_tag([
	'name' => !empty($attrib['form-name']) ? $attrib['form-name'] : 'rcmqsearchform',
	'onsubmit' => sprintf(
	"%s.command('%s'); return false",
	self::JS_OBJECT_NAME,
	!empty($attrib['command']) ? $attrib['command'] : 'search'
	),
	// 'style' => "display:inline"
	], $out);
	}

	if (!empty($attrib['wrapper'])) {
	$options_button = '';

	$ariatag = !empty($attrib['ariatag']) ? $attrib['ariatag'] : 'h2';
	$domain = !empty($attrib['label-domain']) ? $attrib['label-domain'] : null;
	$options = !empty($attrib['options']) ? $attrib['options'] : null;

	$header_label = $this->app->gettext('arialabel' . $attrib['label'], $domain);
	$header_attrs = [
	'id' => 'aria-label-' . $attrib['label'],
	'class' => 'voice'
	];

	$header = html::tag($ariatag, $header_attrs, rcube::Q($header_label));

	if (!empty($attrib['options'])) {
	$options_button = $this->button([
	'type' => 'link',
	'href' => '#search-filter',
	'class' => 'button options',
	'label' => 'options',
	'title' => 'options',
	'tabindex' => '0',
	'innerclass' => 'inner',
	'data-target' => $options
	]);
	}

	$search_button = $this->button([
	'type' => 'link',
	'href' => '#search',
	'class' => 'button search',
	'label' => $attrib['buttontitle'],
	'title' => $attrib['buttontitle'],
	'tabindex' => '0',
	'innerclass' => 'inner',
	]);

	$reset_button = $this->button([
	'type' => 'link',
	'command' => !empty($attrib['reset-command']) ? $attrib['reset-command'] : 'reset-search',
	'class' => 'button reset',
	'label' => 'resetsearch',
	'title' => 'resetsearch',
	'tabindex' => '0',
	'innerclass' => 'inner',
	]);

	$out = html::div([
	'role' => 'search',
	'aria-labelledby' => !empty($attrib['label']) ? 'aria-label-' . $attrib['label'] : null,
	'class' => $attrib['wrapper'],
	],
	"$header$out\n$reset_button\n$options_button\n$search_button"
	);
	}

	return $out;
	}

	/**
	* Builder for GUI object 'message'
	*
	* @param array Named tag parameters
	* @return string HTML code for the gui object
	*/
	protected function message_container($attrib)
	{
	if (isset($attrib['id']) === false) {
	$attrib['id'] = 'rcmMessageContainer';
	}

	$this->add_gui_object('message', $attrib['id']);

	return html::div($attrib, '');
	}

	/**
	* GUI object 'charsetselector'
	*
	* @param array $attrib Named parameters for the select tag
	*
	* @return string HTML code for the gui object
	*/
	public function charset_selector($attrib)
	{
	// pass the following attributes to the form class
	$field_attrib = ['name' => '_charset'];
	foreach ($attrib as $attr => $value) {
	if (in_array($attr, ['id', 'name', 'class', 'style', 'size', 'tabindex'])) {
	$field_attrib[$attr] = $value;
	}
	}

	$charsets = [
	'UTF-8' => 'UTF-8 ('.$this->app->gettext('unicode').')',
	'US-ASCII' => 'ASCII ('.$this->app->gettext('english').')',
	'ISO-8859-1' => 'ISO-8859-1 ('.$this->app->gettext('westerneuropean').')',
	'ISO-8859-2' => 'ISO-8859-2 ('.$this->app->gettext('easterneuropean').')',
	'ISO-8859-4' => 'ISO-8859-4 ('.$this->app->gettext('baltic').')',
	'ISO-8859-5' => 'ISO-8859-5 ('.$this->app->gettext('cyrillic').')',
	'ISO-8859-6' => 'ISO-8859-6 ('.$this->app->gettext('arabic').')',
	'ISO-8859-7' => 'ISO-8859-7 ('.$this->app->gettext('greek').')',
	'ISO-8859-8' => 'ISO-8859-8 ('.$this->app->gettext('hebrew').')',
	'ISO-8859-9' => 'ISO-8859-9 ('.$this->app->gettext('turkish').')',
	'ISO-8859-10' => 'ISO-8859-10 ('.$this->app->gettext('nordic').')',
	'ISO-8859-11' => 'ISO-8859-11 ('.$this->app->gettext('thai').')',
	'ISO-8859-13' => 'ISO-8859-13 ('.$this->app->gettext('baltic').')',
	'ISO-8859-14' => 'ISO-8859-14 ('.$this->app->gettext('celtic').')',
	'ISO-8859-15' => 'ISO-8859-15 ('.$this->app->gettext('westerneuropean').')',
	'ISO-8859-16' => 'ISO-8859-16 ('.$this->app->gettext('southeasterneuropean').')',
	'WINDOWS-1250' => 'Windows-1250 ('.$this->app->gettext('easterneuropean').')',
	'WINDOWS-1251' => 'Windows-1251 ('.$this->app->gettext('cyrillic').')',
	'WINDOWS-1252' => 'Windows-1252 ('.$this->app->gettext('westerneuropean').')',
	'WINDOWS-1253' => 'Windows-1253 ('.$this->app->gettext('greek').')',
	'WINDOWS-1254' => 'Windows-1254 ('.$this->app->gettext('turkish').')',
	'WINDOWS-1255' => 'Windows-1255 ('.$this->app->gettext('hebrew').')',
	'WINDOWS-1256' => 'Windows-1256 ('.$this->app->gettext('arabic').')',
	'WINDOWS-1257' => 'Windows-1257 ('.$this->app->gettext('baltic').')',
	'WINDOWS-1258' => 'Windows-1258 ('.$this->app->gettext('vietnamese').')',
	'ISO-2022-JP' => 'ISO-2022-JP ('.$this->app->gettext('japanese').')',
	'ISO-2022-KR' => 'ISO-2022-KR ('.$this->app->gettext('korean').')',
	'ISO-2022-CN' => 'ISO-2022-CN ('.$this->app->gettext('chinese').')',
	'EUC-JP' => 'EUC-JP ('.$this->app->gettext('japanese').')',
	'EUC-KR' => 'EUC-KR ('.$this->app->gettext('korean').')',
	'EUC-CN' => 'EUC-CN ('.$this->app->gettext('chinese').')',
	'BIG5' => 'BIG5 ('.$this->app->gettext('chinese').')',
	'GB2312' => 'GB2312 ('.$this->app->gettext('chinese').')',
	'KOI8-R' => 'KOI8-R ('.$this->app->gettext('cyrillic').')',
	];

	if ($post = rcube_utils::get_input_value('_charset', rcube_utils::INPUT_POST)) {
	$set = $post;
	}
	else if (!empty($attrib['selected'])) {
	$set = $attrib['selected'];
	}
	else {
	$set = $this->get_charset();
	}

	$set = strtoupper($set);
	if (!isset($charsets[$set]) && preg_match('/^[A-Z0-9-]+$/', $set)) {
	$charsets[$set] = $set;
	}

	$select = new html_select($field_attrib);
	$select->add(array_values($charsets), array_keys($charsets));

	return $select->show($set);
	}

	/**
	* Include content from config/about.<LANG>.html if available
	*/
	protected function about_content($attrib)
	{
	$content = '';
	$filenames = [
	'about.' . $_SESSION['language'] . '.html',
	'about.' . substr($_SESSION['language'], 0, 2) . '.html',
	'about.html',
	];

	foreach ($filenames as $file) {
	$fn = RCUBE_CONFIG_DIR . $file;
	if (is_readable($fn)) {
	$content = file_get_contents($fn);
	$content = $this->parse_conditions($content);
	$content = $this->parse_xml($content);
	break;
	}
	}

	return $content;
	}

	/**
	* Get logo URL for current template based on skin_logo config option
	*
	* @param string $type Type of the logo to check for (e.g. 'print' or 'small')
	* default is null (no special type)
	* @param string $match (optional) 'all' = type, template or wildcard, 'template' = type or template
	* Note: when type is specified matches are limited to type only unless $match is defined
	*
	* @return string image URL
	*/
	protected function get_template_logo($type = null, $match = null)
	{
	$template_logo = null;

	if ($logo = $this->config->get('skin_logo')) {
	if (is_array($logo)) {
	$template_names = [
	$this->skin_name . ':' . $this->template_name . '[' . $type . ']',
	$this->skin_name . ':' . $this->template_name,
	$this->skin_name . ':*[' . $type . ']',
	$this->skin_name . ':[' . $type . ']',
	$this->skin_name . ':*',
	'*:' . $this->template_name . '[' . $type . ']',
	'*:' . $this->template_name,
	':[' . $type . ']',
	'*:[' . $type . ']',
	$this->template_name . '[' . $type . ']',
	$this->template_name,
	'*[' . $type . ']',
	'[' . $type . ']',
	'*',
	];

	if (empty($type)) {
	// If no type provided then remove those options from the list
	$template_names = preg_grep("/\]$/", $template_names, PREG_GREP_INVERT);
	}
	elseif ($match === null) {
	// Type specified with no special matching requirements so remove all none type specific options from the list
	$template_names = preg_grep("/\]$/", $template_names);
	}

	if ($match == 'template') {
	// Match only specific type or template name
	$template_names = preg_grep("/\*$/", $template_names, PREG_GREP_INVERT);
	}

	foreach ($template_names as $key) {
	if (isset($logo[$key])) {
	$template_logo = $logo[$key];
	break;
	}
	}
	}
	else {
	$template_logo = $logo;
	}
	}

	return $template_logo;
	}
	}

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