public function FileImageFormatter::viewElements in File Entity (fieldable files) 8.2

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 ImageFormatter::viewElements

File

src/Plugin/Field/FieldFormatter/FileImageFormatter.php, line 116

Class

FileImageFormatter

Implementation of the 'image' formatter for the file_entity files.

Namespace

Drupal\file_entity\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  $file = $items
    ->getEntity();
  $image_style_setting = $this
    ->getSetting('image_style');

  // Collect cache tags to be added for each item in the field.
  $cache_tags = [];
  if (!empty($image_style_setting)) {
    $image_style = $this->imageStyleStorage
      ->load($image_style_setting);
    $cache_tags = $image_style
      ->getCacheTags();
  }
  $cache_tags = Cache::mergeTags($cache_tags, $file
    ->getCacheTags());
  if (isset($image_style)) {
    $elements[0] = [
      '#theme' => 'image_style',
      '#style_name' => $image_style_setting,
    ];
  }
  else {
    $elements[0] = [
      '#theme' => 'image',
    ];
  }
  $elements[0] += [
    '#uri' => $file
      ->getFileUri(),
    '#cache' => [
      'tags' => $cache_tags,
    ],
  ];
  foreach ([
    'title',
    'alt',
  ] as $element_name) {
    $field_name = $this
      ->getSetting($element_name);
    if ($field_name !== '_none' && $file
      ->hasField($field_name)) {
      $elements[0]['#' . $element_name] = $file->{$field_name}->value;
    }
  }
  return $elements;
}