class ShortcutFormController

class ShortcutFormController extends EntityFormController {

  /**
   * Overrides \Drupal\Core\Entity\EntityFormController::form().
   */
  public function form(array $form, array &$form_state) {
    $form = parent::form($form, $form_state);
    $entity = $this->entity;
    $form['label'] = array(
      '#type' => 'textfield',
      '#title' => t('Set name'),
      '#description' => t('The new set is created by copying items from your default shortcut set.'),
      '#required' => TRUE,
      '#default_value' => $entity
        ->label(),
    );
    $form['id'] = array(
      '#type' => 'machine_name',
      '#machine_name' => array(
        'exists' => 'shortcut_set_load',
        'source' => array(
          'label',
        ),
        'replace_pattern' => '[^a-z0-9-]+',
        'replace' => '-',
      ),
      '#default_value' => $entity
        ->id(),
      '#disabled' => !$entity
        ->isNew(),
      // This id could be used for menu name.
      '#maxlength' => 23,
    );
    $form['actions']['submit']['#value'] = t('Create new set');
    return $form;
  }

  /**
   * Overrides \Drupal\Core\Entity\EntityFormController::actions().
   */
  protected function actions(array $form, array &$form_state) {

    // Disable delete of default shortcut set.
    $actions = parent::actions($form, $form_state);
    $actions['delete']['#access'] = $this->entity
      ->access('delete');
    return $actions;
  }

  /**
   * Overrides \Drupal\Core\Entity\EntityFormController::validate().
   */
  public function validate(array $form, array &$form_state) {
    parent::validate($form, $form_state);
    $entity = $this->entity;

    // Check to prevent a duplicate title.
    if ($form_state['values']['label'] != $entity
      ->label() && shortcut_set_title_exists($form_state['values']['label'])) {
      form_set_error('label', t('The shortcut set %name already exists. Choose another name.', array(
        '%name' => $form_state['values']['label'],
      )));
    }
  }

  /**
   * Overrides \Drupal\Core\Entity\EntityFormController::save().
   */
  public function save(array $form, array &$form_state) {
    $entity = $this->entity;
    $is_new = !$entity
      ->getOriginalID();
    $entity
      ->save();
    if ($is_new) {
      drupal_set_message(t('The %set_name shortcut set has been created. You can edit it from this page.', array(
        '%set_name' => $entity
          ->label(),
      )));
    }
    else {
      drupal_set_message(t('Updated set name to %set-name.', array(
        '%set-name' => $entity
          ->label(),
      )));
    }
    $form_state['redirect'] = 'admin/config/user-interface/shortcut/manage/' . $entity
      ->id();
  }

  /**
   * Overrides \Drupal\Core\Entity\EntityFormController::delete().
   */
  public function delete(array $form, array &$form_state) {
    $entity = $this->entity;
    $form_state['redirect'] = 'admin/config/user-interface/shortcut/manage/' . $entity
      ->id() . '/delete';
  }

}