public function BlockFieldLabelFormatter::viewElements in Block field 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/BlockFieldLabelFormatter.php, line 58

Class

BlockFieldLabelFormatter

Plugin implementation of the 'block_field_label' formatter.

Namespace

Drupal\block_field\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  foreach ($items as $delta => $item) {

    /** @var \Drupal\block_field\BlockFieldItemInterface $item */
    $block_instance = $item
      ->getBlock();

    // Make sure the block exists and is accessible.
    if (!$block_instance) {
      continue;
    }
    $access = $block_instance
      ->access($this->currentUser
      ->getAccount(), TRUE);
    CacheableMetadata::createFromRenderArray($elements)
      ->addCacheableDependency($access)
      ->applyTo($elements);
    if (!$access
      ->isAllowed()) {
      continue;
    }
    $elements[$delta] = [
      '#markup' => $block_instance
        ->label(),
    ];
    CacheableMetadata::createFromRenderArray($elements[$delta])
      ->addCacheableDependency($block_instance)
      ->applyTo($elements[$delta]);
  }
  return $elements;
}