symfony/src/Symfony/Bundle/TwigBundle/Extension/TransExtension.php

<?php

namespace Symfony\Bundle\TwigBundle\Extension;

use Symfony\Bundle\TwigBundle\TokenParser\TransTokenParser;
use Symfony\Bundle\TwigBundle\TokenParser\TransChoiceTokenParser;
use Symfony\Component\Translation\TranslatorInterface;

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 *
 * @author     Fabien Potencier <fabien.potencier@symfony-project.com>
 */
class TransExtension extends \Twig_Extension
{
    protected $translator;

    public function __construct(TranslatorInterface $translator)
    {
        $this->translator = $translator;
    }

    public function getTranslator()
    {
        return $this->translator;
    }

    /**
     * {@inheritdoc}
     */
    public function getFilters()
    {
        return array(
            'trans' => new \Twig_Filter_Method($this, 'trans'),
        );
    }

    /**
     * Returns the token parser instance to add to the existing list.
     *
     * @return array An array of Twig_TokenParser instances
     */
    public function getTokenParsers()
    {
        return array(
            // {% trans "Symfony is great!" %}
            new TransTokenParser(),

            // {% transchoice count %}
            //     {0} There is no apples|{1} There is one apple|]1,Inf] There is {{ count }} apples
            // {% endtranschoice %}
            new TransChoiceTokenParser(),
        );
    }

    public function trans($message, array $arguments = array(), $domain = "messages")
    {
        return $this->translator->trans($message, $arguments, $domain);
    }

    /**
     * Returns the name of the extension.
     *
     * @return string The extension name
     */
    public function getName()
    {
        return 'translator';
    }
}