View source
<?php
namespace Drupal\node\Form;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityDisplayRepositoryInterface;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Symfony\Component\DependencyInjection\ContainerInterface;
class NodePreviewForm extends FormBase {
protected $entityDisplayRepository;
protected $configFactory;
public static function create(ContainerInterface $container) {
return new static($container
->get('entity_display.repository'), $container
->get('config.factory'));
}
public function __construct(EntityDisplayRepositoryInterface $entity_display_repository, ConfigFactoryInterface $config_factory) {
$this->entityDisplayRepository = $entity_display_repository;
$this->configFactory = $config_factory;
}
public function getFormId() {
return 'node_preview_form_select';
}
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
->toUrl('edit-form'),
'#options' => [
'attributes' => [
'class' => [
'node-preview-backlink',
],
],
] + $query_options,
];
$view_mode_options = [
'full' => $this
->t('Full'),
] + $this->entityDisplayRepository
->getViewModeOptionsByBundle('node', $node
->bundle());
unset($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 $form;
}
public function submitForm(array &$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);
}
}