<?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: Domain.php 605 2009-05-03 02:50:26Z kornel $
 * @link     http://phptal.org/
 */

/**
 * i18n:domain
 *
 * The i18n:domain attribute is used to specify the domain to be used to get
 * the translation. If not specified, the translation services will use a
 * default domain. The value of the attribute is used directly; it is not
 * a TALES expression.
 *
 * @package PHPTAL
 * @subpackage Php.attribute.i18n
 */
class PHPTAL_Php_Attribute_I18N_Domain extends PHPTAL_Php_Attribute
{
    public function before(PHPTAL_Php_CodeWriter $codewriter)
    {
        // ensure a domain stack exists or create it
        $codewriter->doIf('!isset($_i18n_domains)');
        $codewriter->pushCode('$_i18n_domains = array()');
        $codewriter->doEnd();

        $expression = $codewriter->interpolateTalesVarsInString($this->expression);

        // push current domain and use new domain
        $code = '$_i18n_domains[] = $_translator->useDomain('.$expression.')';
        $codewriter->pushCode($code);
    }

    public function after(PHPTAL_Php_CodeWriter $codewriter)
    {
        // restore domain
        $code = '$_translator->useDomain(array_pop($_i18n_domains))';
        $codewriter->pushCode($code);
    }
}