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<?php
/**
* PHPTAL templating engine
*
* PHP Version 5
*
* @category HTML
* @package PHPTAL
* @author Laurent Bedubourg <lbedubourg@motion-twin.com>
* @author Kornel Lesiński <kornel@aardvarkmedia.co.uk>
* @license http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License
* @version SVN: $Id$
* @link http://phptal.org/
*/
/**
* PHPTAL_TranslationService gettext implementation.
*
* Because gettext is the most common translation library in use, this
* implementation is shipped with the PHPTAL library.
*
* Please refer to the PHPTAL documentation for usage examples.
*
* @package PHPTAL
* @author Laurent Bedubourg <lbedubourg@motion-twin.com>
*/
class PHPTAL_GetTextTranslator implements PHPTAL_TranslationService
{
private $_vars = array();
private $_currentDomain;
private $_encoding = 'UTF-8';
private $_canonicalize = false;
public function __construct()
{
if (!function_exists('gettext')) throw new PHPTAL_ConfigurationException("Gettext not installed");
$this->useDomain("messages"); // PHP bug #21965
}
/**
* set encoding that is used by template and is expected from gettext
* the default is UTF-8
*
* @param string $enc encoding name
*/
public function setEncoding($enc)
{
$this->_encoding = $enc;
}
/**
* if true, all non-ASCII characters in keys will be converted to C<xxx> form. This impacts performance.
* by default keys will be passed to gettext unmodified.
*
* This function is only for backwards compatibility
*
* @param bool $bool enable old behavior
*/
public function setCanonicalize($bool)
{
$this->_canonicalize = $bool;
}
/**
* It expects locale names as arguments.
* Choses first one that works.
*
* setLanguage("en_US.utf8","en_US","en_GB","en")
*
* @return string - chosen language
*/
public function setLanguage(/*...*/)
{
$langs = func_get_args();
$langCode = $this->trySettingLanguages(LC_ALL, $langs);
if ($langCode) return $langCode;
if (defined("LC_MESSAGES")) {
$langCode = $this->trySettingLanguages(LC_MESSAGES, $langs);
if ($langCode) return $langCode;
}
throw new PHPTAL_ConfigurationException('Language(s) code(s) "'.implode(', ', $langs).'" not supported by your system');
}
private function trySettingLanguages($category, array $langs)
{
foreach ($langs as $langCode) {
putenv("LANG=$langCode");
putenv("LC_ALL=$langCode");
putenv("LANGUAGE=$langCode");
if (setlocale($category, $langCode)) {
return $langCode;
}
}
return null;
}
/**
* Adds translation domain (usually it's the same as name of .po file [without extension])
*
* Encoding must be set before calling addDomain!
*/
public function addDomain($domain, $path='./locale/')
{
bindtextdomain($domain, $path);
if ($this->_encoding) {
bind_textdomain_codeset($domain, $this->_encoding);
}
$this->useDomain($domain);
}
/**
* Switches to one of the domains previously set via addDomain()
*
* @param string $domain name of translation domain to be used.
*
* @return string - old domain
*/
public function useDomain($domain)
{
$old = $this->_currentDomain;
$this->_currentDomain = $domain;
textdomain($domain);
return $old;
}
/**
* used by generated PHP code. Don't use directly.
*/
public function setVar($key, $value)
{
$this->_vars[$key] = $value;
}
/**
* translate given key.
*
* @param bool $htmlencode if true, output will be HTML-escaped.
*/
public function translate($key, $htmlencode=true)
{
if ($this->_canonicalize) $key = self::_canonicalizeKey($key);
$value = gettext($key);
if ($htmlencode) {
$value = htmlspecialchars($value, ENT_QUOTES, $this->_encoding);
}
while (preg_match('/\${(.*?)\}/sm', $value, $m)) {
list($src, $var) = $m;
if (!array_key_exists($var, $this->_vars)) {
throw new PHPTAL_VariableNotFoundException('Interpolation error. Translation uses ${'.$var.'}, which is not defined in the template (via i18n:name)');
}
$value = str_replace($src, $this->_vars[$var], $value);
}
return $value;
}
/**
* For backwards compatibility only.
*/
private static function _canonicalizeKey($key_)
{
$result = "";
$key_ = trim($key_);
$key_ = str_replace("\n", "", $key_);
$key_ = str_replace("\r", "", $key_);
for ($i = 0; $i<strlen($key_); $i++) {
$c = $key_[$i];
$o = ord($c);
if ($o < 5 || $o > 127) {
$result .= 'C<'.$o.'>';
} else {
$result .= $c;
}
}
return $result;
}
}
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