class NodePreviewController

Defines a controller to render a single node in preview.

Hierarchy

Expanded class hierarchy of NodePreviewController

File

View on git.drupalcode.org

core/modules/node/src/Controller/NodePreviewController.php, line 15

Namespace

Drupal\node\Controller
View source 
class NodePreviewController extends EntityViewController {
  
  /**
   * The entity repository service.
   *
   * @var \Drupal\Core\Entity\EntityRepositoryInterface
   */
  protected $entityRepository;
  
  /**
   * Creates a NodeViewController object.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer service.
   * @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
   *   The entity repository.
   */
  public function __construct(EntityTypeManagerInterface $entity_type_manager, RendererInterface $renderer, EntityRepositoryInterface $entity_repository) {
    parent::__construct($entity_type_manager, $renderer);
    $this->entityRepository = $entity_repository;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container->get('entity_type.manager'), $container->get('renderer'), $container->get('entity.repository'));
  }
  
  /**
   * {@inheritdoc}
   */
  public function view(EntityInterface $node_preview, $view_mode_id = 'full', $langcode = NULL) {
    $node_preview->preview_view_mode = $view_mode_id;
    $build = parent::view($node_preview, $view_mode_id);
    $build['#attached']['library'][] = 'node/drupal.node.preview';
    // Don't render cache previews.
    unset($build['#cache']);
    return $build;
  }
  
  /**
   * The _title_callback for the page that renders a single node in preview.
   *
   * @param \Drupal\Core\Entity\EntityInterface $node_preview
   *   The current node.
   *
   * @return string
   *   The page title.
   */
  public function title(EntityInterface $node_preview) {
    return $this->entityRepository
      ->getTranslationFromContext($node_preview)
      ->label();
  }

}

Members

Title Modifiers Object type Summary Overriden Title
EntityViewController::$entityTypeManager protected property The entity type manager.
EntityViewController::$renderer protected property The renderer service.
EntityViewController::buildTitle public function Pre-render callback to build the page title.
EntityViewController::trustedCallbacks public static function Lists the trusted callbacks provided by the implementing class. Overrides TrustedCallbackInterface::trustedCallbacks
EntityViewController::viewRevision public function Provides a page to render a single entity revision.
NodePreviewController::$entityRepository protected property The entity repository service.
NodePreviewController::create public static function Instantiates a new instance of this class. Overrides EntityViewController::create
NodePreviewController::title public function The _title_callback for the page that renders a single node in preview.
NodePreviewController::view public function Provides a page to render a single entity. Overrides EntityViewController::view
NodePreviewController::__construct public function Creates a NodeViewController object. Overrides EntityViewController::__construct
TrustedCallbackInterface::THROW_EXCEPTION constant Untrusted callbacks throw exceptions.
TrustedCallbackInterface::TRIGGER_SILENCED_DEPRECATION constant Untrusted callbacks trigger silenced E_USER_DEPRECATION errors.
TrustedCallbackInterface::TRIGGER_WARNING constant Untrusted callbacks trigger E_USER_WARNING errors.

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