D8: Breadcrumb/page links in views

my_theme.theme

<?php

/**
 * Implements hook_preprocess_HOOK().
 */
function my_theme_preprocess_views_view(&$variables) {
  $view = $variables['view'];
  $variables['breadcrumb_links'] = \Drupal::service('breadcrumb')->build(\Drupal::routeMatch())->getLinks();

  $variables['view_page_urls'] = [];
  $variables['view_page_links'] = [];
  if ($displays = $view->displayHandlers) {
    foreach ($displays as $display_id => $display) {
      if ($display instanceof \Drupal\views\Plugin\views\display\Page) {
        $route_name = sprintf('view.%s.%s', $view->id(), $display_id);
        $url = Url::fromRoute($route_name, [], ['set_active_class' => TRUE]);

        $menu = $display->getOption('menu');
        if (!empty($menu['title'])) {
          $variables['view_page_urls'][$display_id] = $url;
          $variables['view_page_links'][$display_id] = Link::fromTextAndUrl($menu['title'], $url);
        }
      }
    }
  }
}