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<?php
// $Id$
/**
* @file
* Multiple language handling functionality.
*/
/**
* Choose a language for the page, based on language negotiation settings.
*/
function language_initialize() {
global $user;
$mode = variable_get('language_negotiation', LANGUAGE_NEGOTIATION_NONE);
switch ($mode) {
case LANGUAGE_NEGOTIATION_NONE:
return language_default();
case LANGUAGE_NEGOTIATION_DOMAIN:
$languages = language_list();
foreach ($languages as $language) {
$parts = parse_url($language->domain);
if (!empty($parts['host']) && ($_SERVER['SERVER_NAME'] == $parts['host'])) {
return $language;
}
}
return language_default();
case LANGUAGE_NEGOTIATION_PATH_DEFAULT:
case LANGUAGE_NEGOTIATION_PATH:
$languages = language_list('prefix');
// $_GET['q'] might not be available at this time, because
// path initialization runs after the language bootstrap phase.
$args = isset($_GET['q']) ? explode('/', $_GET['q']) : array();
$language = array_shift($args);
if (isset($languages[$language])) {
// Rebuild $GET['q'] with the language removed.
$_GET['q'] = implode('/', $args);
return $languages[$language];
}
elseif ($mode == LANGUAGE_NEGOTIATION_PATH_DEFAULT) {
return language_default();
}
break;
}
// User language.
$languages = language_list();
if ($user->uid && isset($languages[$user->language])) {
return $languages[$user->language];
}
// Browser accept-language parsing.
if ($language = language_from_browser()) {
return $language;
}
// Fall back on the default if everything else fails.
return language_default();
}
/**
* Identify language from the Accept-language HTTP header we got.
*/
function language_from_browser() {
// Specified by the user via the browser's Accept Language setting
// Samples: "hu, en-us;q=0.66, en;q=0.33", "hu,en-us;q=0.5"
$browser_langs = array();
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
$browser_accept = explode(",", $_SERVER['HTTP_ACCEPT_LANGUAGE']);
for ($i = 0; $i < count($browser_accept); $i++) {
// The language part is either a code or a code with a quality.
// We cannot do anything with a * code, so it is skipped.
// If the quality is missing, it is assumed to be 1 according to the RFC.
if (preg_match("!([a-z-]+)(;q=([0-9\\.]+))?!", trim($browser_accept[$i]), $found)) {
$browser_langs[$found[1]] = (isset($found[3]) ? (float) $found[3] : 1.0);
}
}
}
// Order the codes by quality
arsort($browser_langs);
// Try to find the first preferred language we have
$languages = language_list('enabled');
foreach ($browser_langs as $langcode => $q) {
if (isset($languages['1'][$langcode])) {
return $languages['1'][$langcode];
}
}
}
/**
* Rewrite URL's with language based prefix. Parameters are the same
* as those of the url() function.
*/
function language_url_rewrite(&$path, &$options) {
global $language;
// Only modify relative (insite) URLs.
if (!$options['external']) {
// Language can be passed as an option, or we go for current language.
if (!isset($options['language'])) {
$options['language'] = $language;
}
switch (variable_get('language_negotiation', LANGUAGE_NEGOTIATION_NONE)) {
case LANGUAGE_NEGOTIATION_NONE:
// No language dependent path allowed in this mode.
unset($options['language']);
break;
case LANGUAGE_NEGOTIATION_DOMAIN:
if ($options['language']->domain) {
// Ask for an absolute URL with our modified base_url.
$options['absolute'] = TRUE;
$options['base_url'] = $options['language']->domain;
}
break;
case LANGUAGE_NEGOTIATION_PATH_DEFAULT:
$default = language_default();
if ($options['language']->language == $default->language) {
break;
}
// Intentionally no break here.
case LANGUAGE_NEGOTIATION_PATH:
if (!empty($options['language']->prefix)) {
$options['prefix'] = $options['language']->prefix .'/';
}
break;
}
}
}
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