function ExposedFormPluginBase::getCacheContexts

Overrides CacheableDependencyInterface::getCacheContexts

File

core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php, line 350

Class

ExposedFormPluginBase

Base class for Views exposed filter form plugins.

Namespace

Code

public function getCacheContexts() {
    $contexts = [];
    if ($this->options['expose_sort_order']) {
        // The sort order query arg is just important in case there is an exposed
        // sort order.
        $has_exposed_sort_handler = FALSE;
        
        /** @var \Drupal\views\Plugin\views\sort\SortPluginBase $sort_handler */
        foreach ($this->displayHandler
            ->getHandlers('sort') as $sort_handler) {
            if ($sort_handler->isExposed()) {
                $has_exposed_sort_handler = TRUE;
            }
        }
        if ($has_exposed_sort_handler) {
            $contexts[] = 'url.query_args:sort_order';
        }
    }
    // Merge in cache contexts for all exposed filters to prevent display of
    // cached forms.
    foreach ($this->displayHandler
        ->getHandlers('filter') as $filter_handler) {
        if ($filter_handler->isExposed()) {
            $contexts = Cache::mergeContexts($contexts, $filter_handler->getCacheContexts());
        }
    }
    return $contexts;
}