function SystemMenuBlock::getCacheContexts

Overrides ContextAwarePluginTrait::getCacheContexts

File

core/modules/system/src/Plugin/Block/SystemMenuBlock.php, line 227

Class

SystemMenuBlock

Provides a generic Menu block.

Namespace

Code

public function getCacheContexts() {
  // ::build() uses MenuLinkTreeInterface::getCurrentRouteMenuTreeParameters()
  // to generate menu tree parameters, and those take the active menu trail
  // into account. Therefore, we must vary the rendered menu by the active
  // trail of the rendered menu.
  // Additional cache contexts, e.g. those that determine link text or
  // accessibility of a menu, will be bubbled automatically.
  $menu_name = $this->getDerivativeId();
  return Cache::mergeContexts(parent::getCacheContexts(), [
    'route.menu_active_trails:' . $menu_name,
  ]);
}