class AddCssClasses in Facets Block 8

AddCssClasses pre-render callback.

Hierarchy

• class \Drupal\facets_block\AddCssClasses implements TrustedCallbackInterface

File

src/AddCssClasses.php, line 11

Namespace

Drupal\facets_block

class AddCssClasses implements TrustedCallbackInterface {

  /**
   * {@inheritdoc}
   */
  public static function trustedCallbacks() {
    return [
      'preRender',
    ];
  }

  /**
   * Pre-render callback to add hidden class to empty facet block.
   */
  public static function preRender($elements) {
    if (empty($elements['#id'])) {
      $elements['#id'] = Html::getUniqueId($elements['#plugin_id']);
    }

    // Hide facets block if facets array is empty.
    if (empty($elements['content']['#facets'])) {
      $elements['#attributes']['class'][] = 'hidden';
    }
    return $elements;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AddCssClasses::preRender	public static	function	Pre-render callback to add hidden class to empty facet block.
AddCssClasses::trustedCallbacks	public static	function	Lists the trusted callbacks provided by the implementing class. Overrides TrustedCallbackInterface::trustedCallbacks
TrustedCallbackInterface::THROW_EXCEPTION		constant	Untrusted callbacks throw exceptions.
TrustedCallbackInterface::TRIGGER_SILENCED_DEPRECATION		constant	Untrusted callbacks trigger silenced E_USER_DEPRECATION errors.
TrustedCallbackInterface::TRIGGER_WARNING		constant	Untrusted callbacks trigger E_USER_WARNING errors.