Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\node\Controller;
Chris@0: 
Chris@0: use Drupal\Core\Entity\EntityInterface;
Chris@0: use Drupal\Core\Entity\Controller\EntityViewController;
Chris@0: 
Chris@0: /**
Chris@0:  * Defines a controller to render a single node in preview.
Chris@0:  */
Chris@0: class NodePreviewController extends EntityViewController {
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function view(EntityInterface $node_preview, $view_mode_id = 'full', $langcode = NULL) {
Chris@0:     $node_preview->preview_view_mode = $view_mode_id;
Chris@0:     $build = parent::view($node_preview, $view_mode_id);
Chris@0: 
Chris@0:     $build['#attached']['library'][] = 'node/drupal.node.preview';
Chris@0: 
Chris@0:     // Don't render cache previews.
Chris@0:     unset($build['#cache']);
Chris@0: 
Chris@0:     return $build;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * The _title_callback for the page that renders a single node in preview.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Entity\EntityInterface $node_preview
Chris@0:    *   The current node.
Chris@0:    *
Chris@0:    * @return string
Chris@0:    *   The page title.
Chris@0:    */
Chris@0:   public function title(EntityInterface $node_preview) {
Chris@0:     return $this->entityManager->getTranslationFromContext($node_preview)->label();
Chris@0:   }
Chris@0: 
Chris@0: }