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<?php
namespace Drupal\node\Form;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityManagerInterface;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
* Contains a form for switching the view mode of a node during preview.
*/
class NodePreviewForm extends FormBase {
/**
* The entity manager service.
*
* @var \Drupal\Core\Entity\EntityManagerInterface
*/
protected $entityManager;
/**
* The config factory.
*
* @var \Drupal\Core\Config\ConfigFactoryInterface
*/
protected $configFactory;
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container) {
return new static($container->get('entity.manager'), $container->get('config.factory'));
}
/**
* Constructs a new NodePreviewForm.
*
* @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
* The entity manager service.
* @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
* The configuration factory.
*/
public function __construct(EntityManagerInterface $entity_manager, ConfigFactoryInterface $config_factory) {
$this->entityManager = $entity_manager;
$this->configFactory = $config_factory;
}
/**
* {@inheritdoc}
*/
public function getFormId() {
return 'node_preview_form_select';
}
/**
* Form constructor.
*
* @param array $form
* An associative array containing the structure of the form.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form.
* @param \Drupal\Core\Entity\EntityInterface $node
* The node being previews
*
* @return array
* The form structure.
*/
public function buildForm(array $form, FormStateInterface $form_state, EntityInterface $node = NULL) {
$view_mode = $node->preview_view_mode;
$query_options = ['query' => ['uuid' => $node->uuid()]];
$query = $this->getRequest()->query;
if ($query->has('destination')) {
$query_options['query']['destination'] = $query->get('destination');
}
$form['backlink'] = [
'#type' => 'link',
'#title' => $this->t('Back to content editing'),
'#url' => $node->isNew() ? Url::fromRoute('node.add', ['node_type' => $node->bundle()]) : $node->urlInfo('edit-form'),
'#options' => ['attributes' => ['class' => ['node-preview-backlink']]] + $query_options,
];
// Always show full as an option, even if the display is not enabled.
$view_mode_options = ['full' => $this->t('Full')] + $this->entityManager->getViewModeOptionsByBundle('node', $node->bundle());
// Unset view modes that are not used in the front end.
unset($view_mode_options['default']);
unset($view_mode_options['rss']);
unset($view_mode_options['search_index']);
$form['uuid'] = [
'#type' => 'value',
'#value' => $node->uuid(),
];
$form['view_mode'] = [
'#type' => 'select',
'#title' => $this->t('View mode'),
'#options' => $view_mode_options,
'#default_value' => $view_mode,
'#attributes' => [
'data-drupal-autosubmit' => TRUE,
]
];
$form['submit'] = [
'#type' => 'submit',
'#value' => $this->t('Switch'),
'#attributes' => [
'class' => ['js-hide'],
],
];
return $form;
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
$route_parameters = [
'node_preview' => $form_state->getValue('uuid'),
'view_mode_id' => $form_state->getValue('view_mode'),
];
$options = [];
$query = $this->getRequest()->query;
if ($query->has('destination')) {
$options['query']['destination'] = $query->get('destination');
$query->remove('destination');
}
$form_state->setRedirect('entity.node.preview', $route_parameters, $options);
}
}