function MediaThumbnailFormatter::viewElements

Overrides ImageFormatter::viewElements

File

core/modules/media/src/Plugin/Field/FieldFormatter/MediaThumbnailFormatter.php, line 133

Class

MediaThumbnailFormatter

Plugin implementation of the 'media_thumbnail' formatter.

Namespace

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  $media_items = $this->getEntitiesToView($items, $langcode);
  // Early opt-out if the field is empty.
  if (empty($media_items)) {
    return $elements;
  }
  $image_style_setting = $this->getSetting('image_style');
  /** @var \Drupal\media\MediaInterface[] $media_items */
  foreach ($media_items as $delta => $media) {
    $elements[$delta] = [
      '#theme' => 'image_formatter',
      '#item' => $media->get('thumbnail')
        ->first(),
      '#item_attributes' => [
        'loading' => $this->getSetting('image_loading')['attribute'],
      ],
      '#image_style' => $this->getSetting('image_style'),
      '#url' => $this->getMediaThumbnailUrl($media, $items->getEntity()),
    ];
    // Add cacheability of each item in the field.
    $this->renderer
      ->addCacheableDependency($elements[$delta], $media);
  }
  // Add cacheability of the image style setting.
  if ($this->getSetting('image_link') && ($image_style = $this->imageStyleStorage
    ->load($image_style_setting))) {
    $this->renderer
      ->addCacheableDependency($elements, $image_style);
  }
  return $elements;
}