function PlaceholderingRenderCache::set

Overrides RenderCache::set

File

core/lib/Drupal/Core/Render/PlaceholderingRenderCache.php, line 126

Class

PlaceholderingRenderCache

Adds automatic placeholdering to the RenderCache.

Namespace

Code

public function set(array &$elements, array $pre_bubbling_elements) {
  $result = parent::set($elements, $pre_bubbling_elements);
  // Writes to the render cache are disabled on uncacheable HTTP requests, to
  // prevent very low hit rate items from being written. If we're not writing
  // to the cache, there's also no benefit to placeholdering either.
  if (!$this->requestStack
    ->getCurrentRequest()
    ->isMethodCacheable()) {
    return FALSE;
  }
  if ($this->placeholderGenerator
    ->canCreatePlaceholder($pre_bubbling_elements) && $this->placeholderGenerator
    ->shouldAutomaticallyPlaceholder($elements)) {
    // Overwrite $elements with a placeholder. The Renderer (which called this
    // method) will update the context with the bubbleable metadata of the
    // overwritten $elements.
    $elements = $this->createPlaceholderAndRemember($this->getCacheableRenderArray($elements), $pre_bubbling_elements);
  }
  return $result;
}