function SystemMenuBlock::getCacheContexts

Overrides ContextAwarePluginTrait::getCacheContexts

File

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

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,
    ]);
}