Added drupal_menu twig function.

src/TwigExtension.php

@@ -4,6 +4,8 @@ namespace Drupal\twig_tweak;
 
 use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Menu\MenuActiveTrailInterface;
+use Drupal\Core\Menu\MenuLinkTreeInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Site\Settings;
 use Drupal\Core\Utility\Token;
@@ -42,6 +44,20 @@ class TwigExtension extends \Twig_Extension {
    */
   protected $routeMatch;
 
+  /**
+   * The menu link tree service.
+   *
+   * @var \Drupal\Core\Menu\MenuLinkTreeInterface
+   */
+  protected $menuTree;
+
+  /**
+   * The active menu trail service.
+   *
+   * @var \Drupal\Core\Menu\MenuActiveTrailInterface
+   */
+  protected $menuActiveTrail;
+
   /**
    * TwigExtension constructor.
    *
@@ -53,12 +69,18 @@ class TwigExtension extends \Twig_Extension {
    *   The configuration factory.
    * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
    *   The route match.
+   * @param \Drupal\Core\Menu\MenuLinkTreeInterface $menu_tree
+   *   The menu tree service.
+   * @param \Drupal\Core\Menu\MenuActiveTrailInterface $menu_active_trail
+   *   The active menu trail service.
    */
-  public function __construct(EntityTypeManagerInterface $entity_type_manager, Token $token, ConfigFactoryInterface $config_factory, RouteMatchInterface $route_match) {
+  public function __construct(EntityTypeManagerInterface $entity_type_manager, Token $token, ConfigFactoryInterface $config_factory, RouteMatchInterface $route_match, MenuLinkTreeInterface $menu_tree, MenuActiveTrailInterface $menu_active_trail) {
     $this->entityTypeManager = $entity_type_manager;
     $this->token = $token;
     $this->configFactory = $config_factory;
     $this->routeMatch = $route_match;
+    $this->menuTree = $menu_tree;
+    $this->menuActiveTrail = $menu_active_trail;
   }
 
   /**
@@ -71,6 +93,7 @@ class TwigExtension extends \Twig_Extension {
       new \Twig_SimpleFunction('drupal_token', [$this, 'drupalToken']),
       new \Twig_SimpleFunction('drupal_entity', [$this, 'drupalEntity']),
       new \Twig_SimpleFunction('drupal_field', [$this, 'drupalField']),
+      new \Twig_SimpleFunction('drupal_menu', [$this, 'drupalMenu']),
       new \Twig_SimpleFunction('drupal_config', [$this, 'drupalConfig']),
     ];
   }
@@ -178,6 +201,41 @@ class TwigExtension extends \Twig_Extension {
     return NULL;
   }
 
+  /**
+   * Returns the render array for Drupal menu.
+   *
+   * @param string $menu_name
+   *   The name of the menu.
+   * @param int $level
+   *   (optional) Initial menu level.
+   * @param int $depth
+   *   (optional) Maximum number of menu levels to display.
+   *
+   * @return array
+   *   A render array for the menu.
+   */
+  public function drupalMenu($menu_name, $level = 1, $depth = 0) {
+    $parameters = $this->menuTree->getCurrentRouteMenuTreeParameters($menu_name);
+
+    // Adjust the menu tree parameters based on the block's configuration.
+    $parameters->setMinDepth($level);
+    // When the depth is configured to zero, there is no depth limit. When depth
+    // is non-zero, it indicates the number of levels that must be displayed.
+    // Hence this is a relative depth that we must convert to an actual
+    // (absolute) depth, that may never exceed the maximum depth.
+    if ($depth > 0) {
+      $parameters->setMaxDepth(min($level + $depth - 1, $this->menuTree->maxDepth()));
+    }
+
+    $tree = $this->menuTree->load($menu_name, $parameters);
+    $manipulators = [
+      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+      ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+    ];
+    $tree = $this->menuTree->transform($tree, $manipulators);
+    return $this->menuTree->build($tree);
+  }
+
   /**
    * Gets data from this configuration.
    *

tests/src/Functional/TwigTweakTest.php

@@ -88,6 +88,18 @@ class TwigTweakTest extends BrowserTestBase {
     $xpath = '//div[@class = "tt-field"]/div[contains(@class, "field--name-body")]/p[. != ""]';
     $this->assertByXpath($xpath);
 
+    // Test menu (default).
+    $xpath = '//div[@class = "tt-menu-default"]/ul[@class = "menu"]/li/a[. = "Link 1"]/../ul[@class = "menu"]/li/ul[@class = "menu"]/li/a[. = "Link 3"]';
+    $this->assertByXpath($xpath);
+
+    // Test menu (level).
+    $xpath = '//div[@class = "tt-menu-level"]/ul[@class = "menu"]/li/a[. = "Link 2"]/../ul[@class = "menu"]/li/a[. = "Link 3"]';
+    $this->assertByXpath($xpath);
+
+    // Test menu (depth).
+    $xpath = '//div[@class = "tt-menu-depth"]/ul[@class = "menu"]/li[not(ul)]/a[. = "Link 1"]';
+    $this->assertByXpath($xpath);
+
     // Test block.
     $xpath = '//div[@class = "tt-block"]';
     $xpath .= '/div[@id="block-powered-by-drupal"]/span[contains(., "Powered by Drupal")]';

tests/twig_tweak_test/config/install/system.menu.twig-tweak-test.yml

@@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {}
+id: twig-tweak-test
+label: Twig tweak test
+description: ''
+locked: false

tests/twig_tweak_test/templates/twig-tweak-test.html.twig

@@ -6,6 +6,9 @@
   <div class="tt-entity-teaser">{{ drupal_entity('node', 1, 'teaser') }}</div>
   <div class="tt-entity-from-url">{{ drupal_entity('node') }}</div>
   <div class="tt-field">{{ drupal_field('body', 'node', 1) }}</div>
+  <div class="tt-menu-default">{{ drupal_menu('twig-tweak-test') }}</div>
+  <div class="tt-menu-level">{{ drupal_menu('twig-tweak-test', 2) }}</div>
+  <div class="tt-menu-depth">{{ drupal_menu('twig-tweak-test', 1, 1) }}</div>
   <div class="tt-block">{{ drupal_block('powered_by_drupal') }}</div>
   <div class="tt-token">{{ drupal_token('site:name') }}</div>
   <div class="tt-config">{{ drupal_config('user.settings', 'anonymous') }}</div>

twig_tweak.links.menu.yml

@@ -0,0 +1,16 @@
+twig_tweak.link_1:
+  title: Link 1
+  menu_name: twig-tweak-test
+  route_name: <front>
+  expanded: true
+twig_tweak.link_2:
+  title: Link 2
+  menu_name: twig-tweak-test
+  route_name: <front>
+  parent: twig_tweak.link_1
+  expanded: true
+twig_tweak.link_3:
+  title: Link 3
+  menu_name: twig-tweak-test
+  route_name: <front>
+  parent: twig_tweak.link_2

twig_tweak.services.yml

@@ -1,6 +1,6 @@
 services:
   twig_tweak.twig_extension:
     class: Drupal\twig_tweak\TwigExtension
-    arguments: ['@entity_type.manager', '@token', '@config.factory', '@current_route_match']
+    arguments: ['@entity_type.manager', '@token', '@config.factory', '@current_route_match', '@menu.link_tree', '@menu.active_trail']
     tags:
       - { name: twig.extension }