public function KeyValueFormatter::viewElements in Key value 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 TextDefaultFormatter::viewElements

File

src/Plugin/Field/FieldFormatter/KeyValueFormatter.php, line 69

Class

KeyValueFormatter

Plugin implementation of the 'key_value' formatter.

Namespace

Drupal\key_value_field\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {

  // Get the value elements from the TextDefaultFormatter class.
  $value_elements = parent::viewElements($items, $langcode);

  // Buffer the return value.
  $elements = [];

  // Loop through all items.
  foreach ($items as $delta => $item) {

    // Just add the key element to the render array, when 'value_only' is not
    // checked.s
    if (!$this
      ->getSetting('value_only')) {
      $elements[$delta]['key'] = [
        '#plain_text' => nl2br($item->key . ' : '),
      ];
    }

    // Add the value to the render array.
    $elements[$delta]['value'] = $value_elements[$delta];
  }
  return $elements;
}