--- /dev/null
+<?php
+
+namespace Drupal\menu_ui\Form;
+
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Url;
+use Drupal\Core\Form\ConfirmFormBase;
+use Drupal\Core\Menu\MenuLinkManagerInterface;
+use Drupal\Core\Menu\MenuLinkInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Defines a confirmation form for resetting a single modified menu link.
+ */
+class MenuLinkResetForm extends ConfirmFormBase {
+
+ /**
+ * The menu link manager.
+ *
+ * @var \Drupal\Core\Menu\MenuLinkManagerInterface
+ */
+ protected $menuLinkManager;
+
+ /**
+ * The menu link.
+ *
+ * @var \Drupal\Core\Menu\MenuLinkInterface
+ */
+ protected $link;
+
+ /**
+ * Constructs a MenuLinkResetForm object.
+ *
+ * @param \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager
+ * The menu link manager.
+ */
+ public function __construct(MenuLinkManagerInterface $menu_link_manager) {
+ $this->menuLinkManager = $menu_link_manager;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('plugin.manager.menu.link')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'menu_link_reset_confirm';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getQuestion() {
+ return $this->t('Are you sure you want to reset the link %item to its default values?', ['%item' => $this->link->getTitle()]);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getCancelUrl() {
+ return new Url('entity.menu.edit_form', [
+ 'menu' => $this->link->getMenuName(),
+ ]);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getDescription() {
+ return $this->t('Any customizations will be lost. This action cannot be undone.');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getConfirmText() {
+ return $this->t('Reset');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state, MenuLinkInterface $menu_link_plugin = NULL) {
+ $this->link = $menu_link_plugin;
+
+ $form = parent::buildForm($form, $form_state);
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ $this->link = $this->menuLinkManager->resetLink($this->link->getPluginId());
+ drupal_set_message($this->t('The menu link was reset to its default settings.'));
+ $form_state->setRedirectUrl($this->getCancelUrl());
+ }
+
+ /**
+ * Checks access based on whether the link can be reset.
+ *
+ * @param \Drupal\Core\Menu\MenuLinkInterface $menu_link_plugin
+ * The menu link plugin being checked.
+ *
+ * @return \Drupal\Core\Access\AccessResultInterface
+ * The access result.
+ */
+ public function linkIsResettable(MenuLinkInterface $menu_link_plugin) {
+ return AccessResult::allowedIf($menu_link_plugin->isResettable())->setCacheMaxAge(0);
+ }
+
+}