public function RadioactivityReferenceEmitter::viewElements in Radioactivity 4.0.x

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/RadioactivityReferenceEmitter.php, line 79

Class

RadioactivityReferenceEmitter

Plugin implementation of the 'radioactivity_reference_emitter' formatter.

Namespace

Drupal\radioactivity\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  foreach ($this
    ->getEntitiesToView($items, $langcode) as $delta => $entity) {
    $incident = Incident::createFromFieldItemsAndFormatter($items, $entity->_referringItem, $this);
    $key = 'ra_emit_' . radioactivity_unique_emit_id();
    $element = [
      '#attached' => [
        'library' => [
          'radioactivity/triggers',
        ],
        'drupalSettings' => [
          $key => $incident
            ->toJson(),
        ],
      ],
    ];
    if ($this
      ->getSetting('display') === 'raw') {
      $element['#markup'] = $entity
        ->getEnergy();
      $element['#cache']['tags'] = $entity
        ->getCacheTags();
    }
    $elements[$delta] = $element;
  }
  return $elements;
}