EntityViewController::buildTitle

public EntityViewController::buildTitle(array $page)

public function buildTitle(array $page) {
  $entity_type = $page['#entity_type'];
  $entity = $page['#' . $entity_type];
  // If the entity's label is rendered using a field formatter, set the
  // rendered title field formatter as the page title instead of the default
  // plain text title. This allows attributes set on the field to propagate
  // correctly (e.g. RDFa, in-place editing).
  if ($entity instanceof FieldableEntityInterface) {
    $label_field = $entity->getEntityType()->getKey('label');
    if (isset($page[$label_field])) {
      $page['#title'] = $this->renderer->render($page[$label_field]);
    }
  }
  return $page;
}