public static function Dropbutton::preRenderDropbutton in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/Render/Element/Dropbutton.php \Drupal\Core\Render\Element\Dropbutton::preRenderDropbutton()

Pre-render callback: Attaches the dropbutton library and required markup.

File

core/lib/Drupal/Core/Render/Element/Dropbutton.php, line 63

Class

Dropbutton

Provides a render element for a set of links rendered as a drop-down button.

Namespace

Drupal\Core\Render\Element

Code

public static function preRenderDropbutton($element) {
  $element['#attached']['library'][] = 'core/drupal.dropbutton';
  $element['#attributes']['class'][] = 'dropbutton';
  if (!empty($element['#dropbutton_type'])) {
    $element['#attributes']['class'][] = 'dropbutton--' . $element['#dropbutton_type'];
  }
  if (!isset($element['#theme_wrappers'])) {
    $element['#theme_wrappers'] = [];
  }
  array_unshift($element['#theme_wrappers'], 'dropbutton_wrapper');

  // Enable targeted theming of specific dropbuttons (e.g., 'operations' or
  // 'operations__node').
  if (isset($element['#subtype'])) {
    $element['#theme'] .= '__' . $element['#subtype'];
  }
  return $element;
}