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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\Component\Form\Extension\Core\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\DataTransformer\BooleanToStringTransformer;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\OptionsResolver\OptionsResolver;
class CheckboxType extends AbstractType
{
/**
* {@inheritdoc}
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
// Unlike in other types, where the data is NULL by default, it
// needs to be a Boolean here. setData(null) is not acceptable
// for checkboxes and radio buttons (unless a custom model
// transformer handles this case).
// We cannot solve this case via overriding the "data" option, because
// doing so also calls setDataLocked(true).
$builder->setData(isset($options['data']) ? $options['data'] : false);
$builder->addViewTransformer(new BooleanToStringTransformer($options['value'], $options['false_values']));
}
/**
* {@inheritdoc}
*/
public function buildView(FormView $view, FormInterface $form, array $options)
{
$view->vars = array_replace($view->vars, [
'value' => $options['value'],
'checked' => null !== $form->getViewData(),
]);
}
/**
* {@inheritdoc}
*/
public function configureOptions(OptionsResolver $resolver)
{
$emptyData = function (FormInterface $form, $viewData) {
return $viewData;
};
$resolver->setDefaults([
'value' => '1',
'empty_data' => $emptyData,
'compound' => false,
'false_values' => [null],
]);
$resolver->setAllowedTypes('false_values', 'array');
}
/**
* {@inheritdoc}
*/
public function getBlockPrefix()
{
return 'checkbox';
}
}
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