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<?php
declare(strict_types=1);
namespace Drupal\navigation\Menu;
use Drupal\Component\Utility\Html;
use Drupal\Component\Utility\NestedArray;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Menu\MenuActiveTrailInterface;
use Drupal\Core\Menu\MenuLinkManagerInterface;
use Drupal\Core\Menu\MenuLinkTree;
use Drupal\Core\Menu\MenuTreeStorageInterface;
use Drupal\Core\Routing\RouteProviderInterface;
use Drupal\Core\Utility\CallableResolver;
/**
* Extends MenuLinkTree to add specific theme suggestions for the navigation.
*
* @internal
*/
final class NavigationMenuLinkTree extends MenuLinkTree {
/**
* Constructs a \Drupal\navigation\Menu\NavigationMenuLinkTree object.
*
* @param \Drupal\Core\Menu\MenuTreeStorageInterface $treeStorage
* The menu link tree storage.
* @param \Drupal\Core\Menu\MenuLinkManagerInterface $menuLinkManager
* The menu link plugin manager.
* @param \Drupal\Core\Routing\RouteProviderInterface $routeProvider
* The route provider to load routes by name.
* @param \Drupal\Core\Menu\MenuActiveTrailInterface $menuActiveTrail
* The active menu trail service.
* @param \Drupal\Core\Utility\CallableResolver $callableResolver
* The callable resolver.
* @param \Drupal\Core\Extension\ModuleHandlerInterface $moduleHandler
* The module handler.
*/
public function __construct(
MenuTreeStorageInterface $treeStorage,
MenuLinkManagerInterface $menuLinkManager,
RouteProviderInterface $routeProvider,
MenuActiveTrailInterface $menuActiveTrail,
CallableResolver $callableResolver,
protected ModuleHandlerInterface $moduleHandler,
) {
parent::__construct($treeStorage, $menuLinkManager, $routeProvider, $menuActiveTrail, $callableResolver);
}
/**
* {@inheritdoc}
*/
public function build(array $tree): array {
if (!$tree) {
return [];
}
$build = parent::build($tree);
if (empty($build['#items'])) {
return [];
}
/** @var \Drupal\Core\Menu\MenuLinkInterface $link */
$first_link = reset($tree)->link;
// Get the menu name of the first link.
$menu_name = $first_link->getMenuName();
// Add a more specific theme suggestion to differentiate this rendered
// menu from others.
$build['#menu_name'] = $menu_name;
$build['#theme'] = 'navigation_menu__' . strtr($menu_name, '-', '_');
// Loop through menu items and add the plugin id as a class.
foreach ($tree as $item) {
if ($item->access->isAllowed()) {
$plugin_id = $item->link->getPluginId();
$plugin_class = Html::getClass(str_replace('.', '_', $plugin_id));
$build['#items'][$plugin_id]['class'] = $plugin_class;
$url = $build['#items'][$plugin_id]['url'];
$icon_defaults = [
'pack_id' => 'navigation',
'icon_id' => $plugin_class,
'settings' => [
'class' => 'toolbar-button__icon',
'size' => 20,
],
];
$build['#items'][$plugin_id]['icon'] = NestedArray::mergeDeep($icon_defaults, $url->getOption('icon') ?? []);
}
}
return $build;
}
/**
* {@inheritdoc}
*/
public function transform(array $tree, array $manipulators) {
$tree = parent::transform($tree, $manipulators);
$this->moduleHandler->alter('navigation_menu_link_tree', $tree);
return $tree;
}
}
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