Determine the active theme for the request.

Parameters

\Drupal\Core\Routing\RouteMatchInterface $route_match: The current route match object.

Return value

string|null The name of the theme, or NULL if other negotiators, like the configured default one, should be used instead.

Overrides ThemeNegotiatorInterface::determineActiveTheme

File

core/modules/system/src/Theme/BatchNegotiator.php, line 52

Class

BatchNegotiator

Sets the active theme for the batch page.

Namespace

Drupal\system\Theme

Code

public function determineActiveTheme(RouteMatchInterface $route_match) {
  // Retrieve the current state of the batch.
  $request = $this->requestStack
    ->getCurrentRequest();
  $batch =& batch_get();
  if (!$batch && $request->request
    ->has('id')) {
    $batch = $this->batchStorage
      ->load($request->request
      ->get('id'));
  }
  // Use the same theme as the page that started the batch.
  if (!empty($batch['theme'])) {
    return $batch['theme'];
  }
}

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