public static function MediaForm::removeItem in GridStack 8.2

Submit callback for remove buttons.

File

src/Plugin/gridstack/stylizer/MediaForm.php, line 550

Class

MediaForm

Provides the media form for Layout Builder integration.

Namespace

Drupal\gridstack\Plugin\gridstack\stylizer

Code

public static function removeItem(array $form, FormStateInterface $form_state) {
  $triggering_element = $form_state
    ->getTriggeringElement();

  // Get the parents required to find the top-level widget element.
  if (count($triggering_element['#array_parents']) < 4) {
    throw new \LogicException('Expected the remove button to be more than four levels deep in the form. Triggering element parents were: ' . implode(',', $triggering_element['#array_parents']));
  }
  $parents = array_slice($triggering_element['#array_parents'], 0, -3);
  $element = NestedArray::getValue($form, $parents);

  // Get the field state.
  $path = $element['#parents'];
  $values = NestedArray::getValue($form_state
    ->getValues(), $path);
  $field_state = static::getFieldState($element, $form_state);

  // Get the delta of the item being removed.
  $delta = array_slice($triggering_element['#array_parents'], -2, 1)[0];
  if (isset($values['selection'][$delta])) {

    // Add the weight of the removed item to the field state so we can shift
    // focus to the next/previous item in an easy way.
    $field_state['removed_item_weight'] = $values['selection'][$delta]['weight'];
    $field_state['removed_item_id'] = $triggering_element['#media_id'];
    unset($values['selection'][$delta]);
    $field_state['items'] = $values['selection'];
    static::setFieldState($element, $form_state, $field_state);
  }
  $form_state
    ->setRebuild();
}