Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\system\Theme;
Chris@0: 
Chris@0: use Drupal\Core\Batch\BatchStorageInterface;
Chris@0: use Drupal\Core\Routing\RouteMatchInterface;
Chris@0: use Drupal\Core\Theme\ThemeNegotiatorInterface;
Chris@0: use Symfony\Component\HttpFoundation\RequestStack;
Chris@0: 
Chris@0: /**
Chris@0:  * Sets the active theme for the batch page.
Chris@0:  */
Chris@0: class BatchNegotiator implements ThemeNegotiatorInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The batch storage.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Batch\BatchStorageInterface
Chris@0:    */
Chris@0:   protected $batchStorage;
Chris@0: 
Chris@0:   /**
Chris@0:    * The request stack.
Chris@0:    *
Chris@0:    * @var \Symfony\Component\HttpFoundation\RequestStack
Chris@0:    */
Chris@0:   protected $requestStack;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a BatchNegotiator.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Batch\BatchStorageInterface $batch_storage
Chris@0:    *   The batch storage.
Chris@0:    * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
Chris@0:    *   The request stack used to retrieve the current request.
Chris@0:    */
Chris@0:   public function __construct(BatchStorageInterface $batch_storage, RequestStack $request_stack) {
Chris@0:     $this->batchStorage = $batch_storage;
Chris@0:     $this->requestStack = $request_stack;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function applies(RouteMatchInterface $route_match) {
Chris@0:     return $route_match->getRouteName() == 'system.batch_page';
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function determineActiveTheme(RouteMatchInterface $route_match) {
Chris@0:     // Retrieve the current state of the batch.
Chris@0:     $request = $this->requestStack->getCurrentRequest();
Chris@0:     $batch = &batch_get();
Chris@0:     if (!$batch && $request->request->has('id')) {
Chris@0:       $batch = $this->batchStorage->load($request->request->get('id'));
Chris@0:     }
Chris@0:     // Use the same theme as the page that started the batch.
Chris@0:     if (!empty($batch['theme'])) {
Chris@0:       return $batch['theme'];
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0: }