public function RoyalSliderFormatter::viewElements in RoyalSlider Integration 8

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/RoyalSliderFormatter.php, line 144

Contains \Drupal\royalslider\Plugin\Field\FieldFormatter\RoyalSliderFormatter.

Class

RoyalSliderFormatter

Plugin implementation of the 'royalslider' formatter.

Namespace

Drupal\royalslider\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items) {
  $optionset_setting = $this
    ->getSetting('royalslider_optionset');

  // @TODO load a default optionset if it is set to default.
  $optionset = entity_load('royalslider_optionset', $optionset_setting);
  $entity = $items
    ->getEntity();
  $fieldname = $items
    ->getName();
  $slider_id = 'royalslider-' . $entity
    ->getEntityTypeId() . '-' . $entity
    ->id() . '-' . $fieldname;
  $elements = array(
    '#theme' => 'royalslider_formatter',
    '#attributes' => array(
      'id' => $slider_id,
    ),
    '#items' => array(),
    '#optionset' => $optionset_setting,
    '#cache' => [
      'tags' => $optionset
        ->getCacheTags(),
    ],
  );
  foreach ($items as $delta => $item) {
    $elements['#items'][] = [
      '#theme' => 'image_formatter',
      '#item' => $item,
    ];
  }
  $elements['#attached'] = [
    'library' => [
      'royalslider/royalslider',
      'royalslider/royalslider-rsdefault',
    ],
    'drupalSettings' => [
      'royalslider' => [
        'optionsets' => [
          $optionset
            ->label() => $optionset
            ->buildJsOptionset(),
        ],
        'instances' => [
          $slider_id => [
            'optionset' => $optionset
              ->label(),
          ],
        ],
      ],
    ],
  ];
  return $elements;
}