public AjaxBasePageNegotiator::determineActiveTheme(RouteMatchInterface $route_match)
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/lib/Drupal/Core/Theme/AjaxBasePageNegotiator.php, line 75
Class
- AjaxBasePageNegotiator
- Defines a theme negotiator that deals with the active theme on ajax requests.
Namespace
Drupal\Core\Theme
Code
public function determineActiveTheme(RouteMatchInterface $route_match) {
$ajax_page_state = $this->requestStack->getCurrentRequest()->request->get('ajax_page_state');
$theme = $ajax_page_state['theme'];
$token = $ajax_page_state['theme_token'];
// Prevent a request forgery from giving a person access to a theme they
// shouldn't be otherwise allowed to see. However, since everyone is
// allowed to see the default theme, token validation isn't required for
// that, and bypassing it allows most use-cases to work even when accessed
// from the page cache.
if ($theme === $this->configFactory->get('system.theme')->get('default') || $this->csrfGenerator->validate($token, $theme)) {
return $theme;
}
}
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