public function SystemMenuBlock::getCacheContexts in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/system/src/Plugin/Block/SystemMenuBlock.php \Drupal\system\Plugin\Block\SystemMenuBlock::getCacheContexts()
2. 10 core/modules/system/src/Plugin/Block/SystemMenuBlock.php \Drupal\system\Plugin\Block\SystemMenuBlock::getCacheContexts()

Overrides ContextAwarePluginTrait::getCacheContexts

File

core/modules/system/src/Plugin/Block/SystemMenuBlock.php, line 224

Class

SystemMenuBlock

Provides a generic Menu block.

Namespace

Drupal\system\Plugin\Block

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,
  ]);
}