<?php

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

namespace Symfony\Bridge\Twig\Extension;

use Symfony\Bridge\Twig\TokenParser\FormThemeTokenParser;
use Symfony\Bridge\Twig\Form\TwigRendererInterface;
use Symfony\Component\Form\FormViewInterface;
use Symfony\Component\Form\Extension\Csrf\CsrfProvider\CsrfProviderInterface;

/**
 * FormExtension extends Twig with form capabilities.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class FormExtension extends \Twig_Extension
{
    /**
     * This property is public so that it can be accessed directly from compiled
     * templates without having to call a getter, which slightly decreases performance.
     *
     * @var \Symfony\Component\Form\FormRendererInterface
     */
    public $renderer;

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

    /**
     * {@inheritdoc}
     */
    public function initRuntime(\Twig_Environment $environment)
    {
        $this->renderer->setEnvironment($environment);
    }

    /**
     * {@inheritdoc}
     */
    public function getTokenParsers()
    {
        return array(
            // {% form_theme form "SomeBundle::widgets.twig" %}
            new FormThemeTokenParser(),
        );
    }

    /**
     * {@inheritdoc}
     */
    public function getFunctions()
    {
        return array(
            'form_enctype'             => new \Twig_Function_Method($this, 'renderer->renderEnctype', array('is_safe' => array('html'))),
            'form_widget'              => new \Twig_Function_Method($this, 'renderer->renderWidget', array('is_safe' => array('html'))),
            'form_errors'              => new \Twig_Function_Method($this, 'renderer->renderErrors', array('is_safe' => array('html'))),
            'form_label'               => new \Twig_Function_Method($this, 'renderer->renderLabel', array('is_safe' => array('html'))),
            'form_row'                 => new \Twig_Function_Method($this, 'renderer->renderRow', array('is_safe' => array('html'))),
            'form_rest'                => new \Twig_Function_Method($this, 'renderer->renderRest', array('is_safe' => array('html'))),
            'csrf_token'               => new \Twig_Function_Method($this, 'renderer->renderCsrfToken'),
            '_form_is_choice_group'    => new \Twig_Function_Method($this, 'renderer->isChoiceGroup', array('is_safe' => array('html'))),
            '_form_is_choice_selected' => new \Twig_Function_Method($this, 'renderer->isChoiceSelected', array('is_safe' => array('html'))),
        );
    }

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

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return 'form';
    }
}