symfony/src/Symfony/Component/Form/Renderer/Plugin/MaxLengthPlugin.php

<?php

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

namespace Symfony\Component\Form\Renderer\Plugin;

use Symfony\Component\Form\Renderer\RendererInterface;
use Symfony\Component\Form\FieldInterface;

class MaxLengthPlugin implements PluginInterface
{
    private $maxLength;

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

    /**
     * Renders the HTML enctype in the field tag, if necessary
     *
     * Example usage in Twig templates:
     *
     *     <field action="..." method="post" {{ field.render.enctype }}>
     *
     * @param Form $field   The field for which to render the encoding type
     */
    public function setUp(RendererInterface $renderer)
    {
        $renderer->setVar('max_length', $this->maxLength);
    }
}