public function ViewUI::getStandardButtons in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/views_ui/src/ViewUI.php \Drupal\views_ui\ViewUI::getStandardButtons()

Provide a standard set of Apply/Cancel/OK buttons for the forms. Also provide a hidden op operator because the forms plugin doesn't seem to properly provide which button was clicked.

TODO: Is the hidden op operator still here somewhere, or is that part of the docblock outdated?

File

core/modules/views_ui/src/ViewUI.php, line 282

Class

ViewUI

Stores UI related temporary settings.

Namespace

Drupal\views_ui

Code

public function getStandardButtons(&$form, FormStateInterface $form_state, $form_id, $name = NULL) {
  $form['actions'] = [
    '#type' => 'actions',
  ];
  if (empty($name)) {
    $name = t('Apply');
    if (!empty($this->stack) && count($this->stack) > 1) {
      $name = t('Apply and continue');
    }
    $names = [
      t('Apply'),
      t('Apply and continue'),
    ];
  }

  // Forms that are purely informational set an ok_button flag, so we know not
  // to create an "Apply" button for them.
  if (!$form_state
    ->get('ok_button')) {
    $form['actions']['submit'] = [
      '#type' => 'submit',
      '#value' => $name,
      '#id' => 'edit-submit-' . Html::getUniqueId($form_id),
      // The regular submit handler ($form_id . '_submit') does not apply if
      // we're updating the default display. It does apply if we're updating
      // the current display. Since we have no way of knowing at this point
      // which display the user wants to update, views_ui_standard_submit will
      // take care of running the regular submit handler as appropriate.
      '#submit' => [
        [
          $this,
          'standardSubmit',
        ],
      ],
      '#button_type' => 'primary',
    ];

    // Form API button click detection requires the button's #value to be the
    // same between the form build of the initial page request, and the
    // initial form build of the request processing the form submission.
    // Ideally, the button's #value shouldn't change until the form rebuild
    // step. However, \Drupal\views_ui\Form\Ajax\ViewsFormBase::getForm()
    // implements a different multistep form workflow than the Form API does,
    // and adjusts $view->stack prior to form processing, so we compensate by
    // extending button click detection code to support any of the possible
    // button labels.
    if (isset($names)) {
      $form['actions']['submit']['#values'] = $names;
      $form['actions']['submit']['#process'] = array_merge([
        'views_ui_form_button_was_clicked',
      ], \Drupal::service('element_info')
        ->getInfoProperty($form['actions']['submit']['#type'], '#process', []));
    }

    // If a validation handler exists for the form, assign it to this button.
    $form['actions']['submit']['#validate'][] = [
      $form_state
        ->getFormObject(),
      'validateForm',
    ];
  }

  // Create a "Cancel" button. For purely informational forms, label it "OK".
  $cancel_submit = function_exists($form_id . '_cancel') ? $form_id . '_cancel' : [
    $this,
    'standardCancel',
  ];
  $form['actions']['cancel'] = [
    '#type' => 'submit',
    '#value' => !$form_state
      ->get('ok_button') ? t('Cancel') : t('Ok'),
    '#submit' => [
      $cancel_submit,
    ],
    '#validate' => [],
    '#limit_validation_errors' => [],
  ];

  // Compatibility, to be removed later: // TODO: When is "later"?
  // We used to set these items on the form, but now we want them on the $form_state:
  if (isset($form['#title'])) {
    $form_state
      ->set('title', $form['#title']);
  }
  if (isset($form['#section'])) {
    $form_state
      ->set('#section', $form['#section']);
  }

  // Finally, we never want these cached -- our object cache does that for us.
  $form['#no_cache'] = TRUE;
}