public function MenuReferenceFormatter::viewElements in Menu Reference Render (Formatter) 8.2

Same name and namespace in other branches

1. 8 src/Plugin/Field/FieldFormatter/MenuReferenceFormatter.php \Drupal\menu_reference_render\Plugin\Field\FieldFormatter\MenuReferenceFormatter::viewElements()

Builds a renderable array for a field value.

Parameters

\Drupal\Core\Field\FieldItemListInterface $items: The field values to be rendered.

string $langcode: The language that should be used to render the field.

Return value

array A renderable array for $items, as an array of child elements keyed by consecutive numeric indexes starting from 0.

Overrides FormatterInterface::viewElements

File

src/Plugin/Field/FieldFormatter/MenuReferenceFormatter.php, line 28

Class

MenuReferenceFormatter

Plugin implementation of the 'menu_reference_render' formatter.

Namespace

Drupal\menu_reference_render\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  foreach ($this
    ->getEntitiesToView($items, $langcode) as $entity) {
    $menu_name = $entity
      ->get('id');
    $menu_tree = \Drupal::menuTree();
    $menu_active_trail = \Drupal::service('menu.active_trail');

    // Build the typical default set of menu tree parameters.
    if ($this
      ->getSetting('expand_all_items')) {
      $parameters = new MenuTreeParameters();
      $active_trail = $menu_active_trail
        ->getActiveTrailIds($menu_name);
      $parameters
        ->setActiveTrail($active_trail);
    }
    else {
      $parameters = $menu_tree
        ->getCurrentRouteMenuTreeParameters($menu_name);
    }

    // Load the tree based on this set of parameters.
    $tree = $menu_tree
      ->load($menu_name, $parameters);
    $manipulators = [
      [
        'callable' => 'menu.default_tree_manipulators:checkNodeAccess',
      ],
      [
        'callable' => 'menu.default_tree_manipulators:checkAccess',
      ],
      [
        'callable' => 'menu.default_tree_manipulators:generateIndexAndSort',
      ],
    ];
    $tree = $menu_tree
      ->transform($tree, $manipulators);
    $elements[] = $menu_tree
      ->build($tree);
  }
  return $elements;
}