class BulkForm

class BulkForm extends BulkFormBase {

  /**
   * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::defineOptions().
   */
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['include_exclude'] = array(
      'default' => 'exclude',
    );
    $options['selected_actions'] = array(
      'default' => array(),
    );
    return $options;
  }

  /**
   * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::buildOptionsForm().
   */
  public function buildOptionsForm(&$form, &$form_state) {
    parent::buildOptionsForm($form, $form_state);
    $form['include_exclude'] = array(
      '#type' => 'radios',
      '#title' => t('Available actions'),
      '#options' => array(
        'exclude' => t('All actions, except selected'),
        'include' => t('Only selected actions'),
      ),
      '#default_value' => $this->options['include_exclude'],
    );
    $form['selected_actions'] = array(
      '#type' => 'checkboxes',
      '#title' => t('Selected actions'),
      '#options' => $this
        ->getBulkOptions(FALSE),
      '#default_value' => $this->options['selected_actions'],
    );
  }

  /**
   * Overrides \Drupal\views\Plugin\views\PluginBase::buildOptionsForm().
   */
  public function validateOptionsForm(&$form, &$form_state) {
    parent::validateOptionsForm($form, $form_state);
    $form_state['values']['options']['selected_actions'] = array_filter($form_state['values']['options']['selected_actions']);
  }

  /**
   * Implements \Drupal\system\Plugin\views\field\BulkFormBase::getBulkOptions().
   *
   * @param bool $filtered
   *   (optional) Whether to filter actions to selected actions.
   */
  protected function getBulkOptions($filtered = TRUE) {

    // Get all available actions.
    $entity_type = $this
      ->getEntityType();
    $options = array();

    // Filter the action list.
    foreach ($this->actions as $id => $action) {
      if ($filtered) {
        $in_selected = in_array($id, $this->options['selected_actions']);

        // If the field is configured to include only the selected actions,
        // skip actions that were not selected.
        if ($this->options['include_exclude'] == 'include' && !$in_selected) {
          continue;
        }
        elseif ($this->options['include_exclude'] == 'exclude' && $in_selected) {
          continue;
        }
      }

      // Only allow actions that are valid for this entity type.
      if ($action
        ->getType() == $entity_type) {
        $options[$id] = $action
          ->label();
      }
    }
    return $options;
  }

  /**
   * Implements \Drupal\system\Plugin\views\field\BulkFormBase::views_form_submit().
   */
  public function views_form_submit(&$form, &$form_state) {
    parent::views_form_submit($form, $form_state);
    if ($form_state['step'] == 'views_form_views_form') {
      $count = count(array_filter($form_state['values'][$this->options['id']]));
      $action = $this->actions[$form_state['values']['action']];
      if ($count) {
        drupal_set_message(format_plural($count, '%action was applied to @count item.', '%action was applied to @count items.', array(
          '%action' => $action
            ->label(),
        )));
      }
    }
  }

}