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<?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\Extension\Core\View\ChoiceView;
/**
* 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 TwigRendererInterface
*/
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_Node('Symfony\Bridge\Twig\Node\FormEnctypeNode', array('is_safe' => array('html'))),
'form_widget' => new \Twig_Function_Node('Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', array('is_safe' => array('html'))),
'form_errors' => new \Twig_Function_Node('Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', array('is_safe' => array('html'))),
'form_label' => new \Twig_Function_Node('Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', array('is_safe' => array('html'))),
'form_row' => new \Twig_Function_Node('Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', array('is_safe' => array('html'))),
'form_rest' => new \Twig_Function_Node('Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', array('is_safe' => array('html'))),
'form' => new \Twig_Function_Node('Symfony\Bridge\Twig\Node\RenderBlockNode', array('is_safe' => array('html'))),
'form_start' => new \Twig_Function_Node('Symfony\Bridge\Twig\Node\RenderBlockNode', array('is_safe' => array('html'))),
'form_end' => new \Twig_Function_Node('Symfony\Bridge\Twig\Node\RenderBlockNode', array('is_safe' => array('html'))),
'csrf_token' => new \Twig_Function_Method($this, 'renderer->renderCsrfToken'),
);
}
/**
* {@inheritdoc}
*/
public function getFilters()
{
return array(
new \Twig_SimpleFilter('humanize', array($this->renderer, 'humanize')),
);
}
/**
* {@inheritdoc}
*/
public function getTests()
{
return array(
new \Twig_SimpleTest('selectedchoice', array($this, 'isSelectedChoice')),
);
}
/**
* Returns whether a choice is selected for a given form value.
*
* Unfortunately Twig does not support an efficient way to execute the
* "is_selected" closure passed to the template by ChoiceType. It is faster
* to implement the logic here (around 65ms for a specific form).
*
* Directly implementing the logic here is also faster than doing so in
* ChoiceView (around 30ms).
*
* The worst option tested so far is to implement the logic in ChoiceView
* and access the ChoiceView method directly in the template. Doing so is
* around 220ms slower than doing the method call here in the filter. Twig
* seems to be much more efficient at executing filters than at executing
* methods of an object.
*
* @param ChoiceView $choice The choice to check.
* @param string|array $selectedValue The selected value to compare.
*
* @return Boolean Whether the choice is selected.
*
* @see ChoiceView::isSelected()
*/
public function isSelectedChoice(ChoiceView $choice, $selectedValue)
{
if (is_array($selectedValue)) {
return false !== array_search($choice->value, $selectedValue, true);
}
return $choice->value === $selectedValue;
}
/**
* {@inheritdoc}
*/
public function getName()
{
return 'form';
}
}