public function FieldsSettingsForm::multiStepAjax in Diff 8

Ajax handler for multi-step buttons.

Parameters

array $form: The form array.

\Drupal\Core\Form\FormStateInterface $form_state: The form state object.

Return value

array The fields form for a plugin.

File

src/Form/FieldsSettingsForm.php, line 359

Class

FieldsSettingsForm

Configure fields with their diff builder plugin settings.

Namespace

Drupal\diff\Form

Code

public function multiStepAjax(array $form, FormStateInterface $form_state) {
  $trigger = $form_state
    ->getTriggeringElement();
  if (isset($trigger['#op'])) {
    $op = $trigger['#op'];

    // Pick the elements that need to receive the ajax-new-content effect.
    $updated_rows = [];
    $updated_columns = [];
    switch ($op) {
      case 'edit':
        $updated_rows = [
          $trigger['#field_key'],
        ];
        $updated_columns = array(
          'plugin',
        );
        break;
      case 'update':
      case 'cancel':
        $updated_rows = [
          $trigger['#field_key'],
        ];
        $updated_columns = array(
          'plugin',
          'settings_edit',
        );
        break;
    }
    foreach ($updated_rows as $name) {
      foreach ($updated_columns as $key) {
        $element =& $form['fields'][$name][$key];
        $element['#prefix'] = '<div class="ajax-new-content">' . (isset($element['#prefix']) ? $element['#prefix'] : '');
        $element['#suffix'] = (isset($element['#suffix']) ? $element['#suffix'] : '') . '</div>';
      }
    }
  }

  // Return the whole table.
  return $form['fields'];
}