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524 lines
16 KiB
PHP
524 lines
16 KiB
PHP
<?php
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/**
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* The NLS:: class provides Native Language Support. This includes common
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* methods for handling language detection and selection, timezones, and
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* hostname->country lookups.
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*
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* $Horde: framework/NLS/NLS.php,v 1.86 2005/02/28 15:45:56 jan Exp $
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*
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* Copyright 1999-2005 Jon Parise <jon@horde.org>
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* Copyright 1999-2005 Chuck Hagenbuch <chuck@horde.org>
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* Copyright 2002-2005 Jan Schneider <jan@horde.org>
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* Copyright 2003-2005 Michael Slusarz <slusarz@bigworm.colorado.edu>
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*
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* See the enclosed file COPYING for license information (LGPL). If you
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* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
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*
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* @author Jon Parise <jon@horde.org>
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* @author Chuck Hagenbuch <chuck@horde.org>
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* @author Jan Schneider <jan@horde.org>
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* @author Michael Slusarz <slusarz@bigworm.colorado.edu>
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* @version $Revision$
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* @since Horde 3.0
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* @package Horde_NLS
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*/
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class NLS {
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/**
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* Selects the most preferred language for the current client session.
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*
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* @access public
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*
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* @return string The selected language abbreviation.
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*/
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function select()
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{
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global $nls, $prefs;
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$lang = Util::getFormData('new_lang');
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/* First, check if language pref is locked and, if so, set it to its
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value */
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if (isset($prefs) && $prefs->isLocked('language')) {
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$language = $prefs->getValue('language');
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/* Check if the user selected a language from the login screen */
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} elseif (!empty($lang)) {
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$language = $lang;
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/* Check if we have a language set in a cookie */
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} elseif (isset($_SESSION['horde_language'])) {
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$language = $_SESSION['horde_language'];
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/* Use site-wide default, if one is defined */
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} elseif (!empty($nls['defaults']['language'])) {
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$language = $nls['defaults']['language'];
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/* Try browser-accepted languages. */
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} elseif (!empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
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/* The browser supplies a list, so return the first valid one. */
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$browser_langs = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
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foreach ($browser_langs as $lang) {
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/* Strip quality value for language */
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if (($pos = strpos($lang, ';')) !== false) {
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$lang = substr($lang, 0, $pos);
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}
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$lang = NLS::_map(trim($lang));
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if (NLS::isValid($lang)) {
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$language = $lang;
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break;
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}
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/* In case no full match, save best guess based on prefix */
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if (!isset($partial_lang) &&
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NLS::isValid(NLS::_map(substr($lang, 0, 2)))) {
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$partial_lang = NLS::_map(substr($lang, 0, 2));
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}
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}
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}
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if (!isset($language)) {
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if (isset($partial_lang)) {
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$language = $partial_lang;
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} else {
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/* No dice auto-detecting, default to US English. */
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$language = 'en_US';
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}
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}
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return basename($language);
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}
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/**
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* Sets the language.
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*
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* @access public
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*
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* @param optional string $lang The language abbriviation.
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*/
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function setLang($lang = null)
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{
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include_once HORDE_BASE . '/config/nls.php';
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if (empty($lang) || !NLS::isValid($lang)) {
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$lang = NLS::select();
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}
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if (isset($GLOBALS['language']) && $GLOBALS['language'] == $lang) {
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return;
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}
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$GLOBALS['language'] = $lang;
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/* First try language with the current charset. */
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$lang_charset = $lang . '.' . NLS::getCharset();
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if ($lang_charset != setlocale(LC_ALL, $lang_charset)) {
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/* Next try language with its default charset. */
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global $nls;
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$charset = !empty($nls['charsets'][$lang]) ? $nls['charsets'][$lang] : $nls['defaults']['charset'];
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$lang_charset = $lang . '.' . $charset;
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NLS::_cachedCharset(0, $charset);
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if ($lang_charset != setlocale(LC_ALL, $lang_charset)) {
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/* At last try language solely. */
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$lang_charset = $lang;
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setlocale(LC_ALL, $lang_charset);
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}
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}
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@putenv('LANG=' . $lang_charset);
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@putenv('LANGUAGE=' . $lang_charset);
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}
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/**
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* Sets the gettext domain.
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*
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* @access public
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*
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* @param string $app The application name.
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* @param string $directory The directory where the application's
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* LC_MESSAGES directory resides.
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* @param string $charset The charset.
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*/
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function setTextdomain($app, $directory, $charset)
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{
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bindtextdomain($app, $directory);
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textdomain($app);
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/* The existence of this function depends on the platform. */
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if (function_exists('bind_textdomain_codeset')) {
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NLS::_cachedCharset(0, bind_textdomain_codeset($app, $charset));
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}
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if (!headers_sent()) {
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header('Content-Type: text/html; charset=' . $charset);
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}
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}
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/**
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* Determines whether the supplied language is valid.
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*
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* @access public
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*
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* @param string $language The abbreviated name of the language.
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*
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* @return boolean True if the language is valid, false if it's not
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* valid or unknown.
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*/
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function isValid($language)
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{
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return !empty($GLOBALS['nls']['languages'][$language]);
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}
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/**
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* Maps languages with common two-letter codes (such as nl) to the
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* full gettext code (in this case, nl_NL). Returns the language
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* unmodified if it isn't an alias.
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*
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* @access private
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*
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* @param string $language The language code to map.
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*
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* @return string The mapped language code.
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*/
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function _map($language)
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{
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require_once 'Horde/String.php';
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$aliases = &$GLOBALS['nls']['aliases'];
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// Translate the $language to get broader matches.
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// (eg. de-DE should match de_DE)
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$trans_lang = str_replace('-', '_', $language);
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$lang_parts = explode('_', $trans_lang);
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$trans_lang = String::lower($lang_parts[0]);
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if (isset($lang_parts[1])) {
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$trans_lang .= '_' . String::upper($lang_parts[1]);
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}
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// See if we get a match for this
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if (!empty($aliases[$trans_lang])) {
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return $aliases[$trans_lang];
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}
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// If we get that far down, the language cannot be found.
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// Return $trans_lang.
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return $trans_lang;
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}
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/**
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* Returns the charset for the current language.
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*
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* @access public
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*
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* @param boolean $original If true returns the original charset of the
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* translation, the actually used one otherwise.
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*
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* @return string The character set that should be used with the current
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* locale settings.
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*/
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function getCharset($original = false)
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{
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global $language, $nls;
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/* Get cached results. */
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$cacheKey = intval($original);
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$charset = NLS::_cachedCharset($cacheKey);
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if (!is_null($charset)) {
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return $charset;
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}
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if ($original) {
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$charset = empty($nls['charsets'][$language]) ? $nls['defaults']['charset'] : $nls['charsets'][$language];
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} else {
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require_once 'Horde/Browser.php';
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$browser = &Browser::singleton();
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if ($browser->hasFeature('utf') &&
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(Util::extensionExists('iconv') ||
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Util::extensionExists('mbstring'))) {
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$charset = 'UTF-8';
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}
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}
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if (is_null($charset)) {
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$charset = NLS::getExternalCharset();
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}
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NLS::_cachedCharset($cacheKey, $charset);
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return $charset;
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}
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/**
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* Returns the current charset of the environment
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*
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* @access public
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*
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* @return string The character set that should be used with the current
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* locale settings.
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*/
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function getExternalCharset()
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{
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global $language, $nls;
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/* Get cached results. */
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$charset = NLS::_cachedCharset(2);
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if (!is_null($charset)) {
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return $charset;
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}
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$lang_charset = setlocale(LC_ALL, 0);
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if (strpos($lang_charset, ';') === false &&
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strpos($lang_charset, '/') === false) {
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$lang_charset = explode('.', $lang_charset);
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if ((count($lang_charset) == 2) && !empty($lang_charset[1])) {
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NLS::_cachedCharset(2, $lang_charset[1]);
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return $lang_charset[1];
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}
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}
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return (!empty($nls['charsets'][$language])) ? $nls['charsets'][$language] : $nls['defaults']['charset'];
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}
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/**
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* Sets or returns the charset used under certain conditions.
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*
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* @access private
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*
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* @param integer $index The ID of a cache slot. 0 for the UI charset, 1
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* for the translation charset and 2 for the
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* external charset.
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* @param string $charset If specified, this charset will be stored in the
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* given cache slot. Otherwise the content of the
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* specified cache slot will be returned.
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*/
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function _cachedCharset($index, $charset = null)
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{
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static $cache;
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if (!isset($cache)) {
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$cache = array();
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}
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if ($charset == null) {
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return isset($cache[$index]) ? $cache[$index] : null;
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} else {
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$cache[$index] = $charset;
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}
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}
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/**
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* Returns the charset to use for outgoing emails.
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*
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* @return string The preferred charset for outgoing mails based on
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* the user's preferences and the current language.
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*/
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function getEmailCharset()
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{
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global $prefs, $language, $nls;
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$charset = $prefs->getValue('sending_charset');
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if (!empty($charset)) {
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return $charset;
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}
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return isset($nls['emails'][$language]) ? $nls['emails'][$language] :
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(isset($nls['charsets'][$language]) ? $nls['charsets'][$language] : $nls['defaults']['charset']);
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}
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/**
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* Check to see if character set is valid for htmlspecialchars() calls.
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*
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* @access public
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*
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* @param string $charset The character set to check.
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*
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* @return boolean Is charset valid for the current system?
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*/
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function checkCharset($charset)
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{
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static $check;
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if (is_null($charset) || empty($charset)) {
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return false;
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}
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if (isset($check[$charset])) {
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return $check[$charset];
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} elseif (!isset($check)) {
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$check = array();
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}
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$valid = true;
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ini_set('track_errors', 1);
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@htmlspecialchars('', ENT_COMPAT, $charset);
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if (isset($php_errormsg)) {
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$valid = false;
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}
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ini_restore('track_errors');
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$check[$charset] = $valid;
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return $valid;
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}
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/**
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* Sets the current timezone, if available.
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*
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* @access public
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*/
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function setTimeZone()
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{
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global $prefs;
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$tz = $prefs->getValue('timezone');
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if (!empty($tz)) {
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@putenv('TZ=' . $tz);
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}
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}
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/**
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* Get the locale info returned by localeconv(), but cache it, to
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* avoid repeated calls.
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*
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* @access public
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*
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* @return array The results of localeconv().
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*/
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function getLocaleInfo()
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{
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static $lc_info;
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if (!isset($lc_info)) {
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$lc_info = localeconv();
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}
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return $lc_info;
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}
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/**
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* Get the language info returned by nl_langinfo(), but cache it, to
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* avoid repeated calls.
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*
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* @access public
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* @since Horde 3.1
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*
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* @param const $item The langinfo item to return.
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*
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* @return array The results of nl_langinfo().
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*/
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function getLangInfo($item)
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{
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static $nl_info = array();
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if (!isset($nl_info[$item])) {
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$nl_info[$item] = nl_langinfo($item);
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}
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return $nl_info[$item];
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}
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/**
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* Get country information from a hostname or IP address.
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*
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* @access public
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*
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* @param string $host The hostname or IP address.
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*
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* @return mixed On success, return an array with the following entries:
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* 'code' => Country Code
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* 'name' => Country Name
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* On failure, return false.
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*/
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function getCountryByHost($host)
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{
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global $conf;
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/* List of generic domains that we know is not in the country TLD
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list. See: http://www.iana.org/gtld/gtld.htm */
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$generic = array(
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'aero', 'biz', 'com', 'coop', 'edu', 'gov', 'info', 'int', 'mil',
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'museum', 'name', 'net', 'org', 'pro'
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);
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$checkHost = $host;
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if (preg_match('/^\d+\.\d+\.\d+\.\d+$/', $host)) {
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$checkHost = @gethostbyaddr($host);
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}
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/* Get the TLD of the hostname. */
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$pos = strrpos($checkHost, '.');
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if ($pos === false) {
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return false;
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}
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$domain = String::lower(substr($checkHost, $pos + 1));
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/* Try lookup via TLD first. */
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if (!in_array($domain, $generic)) {
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require 'Horde/NLS/tld.php';
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if (isset($tld[$domain])) {
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return array('code' => $domain, 'name' => $tld[$domain]);
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}
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}
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/* Try GeoIP lookup next. */
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if (!empty($conf['geoip']['datafile'])) {
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require_once 'Horde/NLS/GeoIP.php';
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$geoip = &NLS_GeoIP::singleton($conf['geoip']['datafile']);
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$id = $geoip->countryIdByName($checkHost);
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if (!empty($id)) {
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return array('code' => String::lower($GLOBALS['GEOIP_COUNTRY_CODES'][$id]), 'name' => $GLOBALS['GEOIP_COUNTRY_NAMES'][$id]);
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}
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}
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return false;
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}
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/**
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* Returns a Horde image link to the country flag.
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*
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* @access public
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*
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* @param string $host The hostname or IP address.
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*
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* @return string The image URL, or the empty string on error.
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*/
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function generateFlagImageByHost($host)
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{
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global $registry;
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$data = NLS::getCountryByHost($host);
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if ($data !== false) {
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$img = $data['code'] . '.png';
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if (file_exists($registry->get('themesfs', 'horde') . '/graphics/flags/' . $img)) {
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return Horde::img($img, $data['name'], '', $registry->getImageDir('horde') . '/flags');
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} else {
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return '[' . $data['name'] . ']';
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}
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}
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return '';
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}
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/**
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* Returns either a specific or all ISO-3166 country names.
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*
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* @access public
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*
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* @param optional string $code The ISO 3166 country code.
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*
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* @return mixed If a country code has been requested will return the
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* corresponding country name. If empty will return an
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* array of all the country codes and their names.
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*/
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function &getCountryISO($code = '')
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{
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static $countries = array();
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if (empty($countries)) {
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require_once 'Horde/NLS/countries.php';
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}
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if (empty($code)) {
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return $countries;
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} elseif (isset($countries[$code])) {
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return $countries[$code];
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}
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return false;
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}
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}
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