Issue #3352640: Provide diff tokens for nodes

Closes #3352640

src/DiffLayoutManager.php

@@ -6,7 +6,6 @@ namespace Drupal\diff;
 
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Config\ConfigFactoryInterface;
-use Drupal\Core\Config\ImmutableConfig;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Plugin\DefaultPluginManager;
@@ -18,9 +17,6 @@ use Drupal\diff\Attribute\DiffLayoutBuilder as DiffLayoutBuilderAttribute;
  */
 class DiffLayoutManager extends DefaultPluginManager {
 
-  protected ImmutableConfig $config;
-  protected ImmutableConfig $layoutPluginsConfig;
-
   /**
    * Constructs a DiffLayoutManager object.
    */
@@ -29,14 +25,12 @@ class DiffLayoutManager extends DefaultPluginManager {
     CacheBackendInterface $cache_backend,
     ModuleHandlerInterface $module_handler,
     protected EntityTypeManagerInterface $entityTypeManager,
-    ConfigFactoryInterface $config_factory,
+    protected ConfigFactoryInterface $configFactory,
   ) {
     parent::__construct('Plugin/diff/Layout', $namespaces, $module_handler, DiffLayoutInterface::class, DiffLayoutBuilderAttribute::class, DiffLayoutBuilderAnnotation::class);
 
     $this->setCacheBackend($cache_backend, 'diff_layout_builder_plugins');
     $this->alterInfo('diff_layout_builder_info');
-    $this->config = $config_factory->get('diff.settings');
-    $this->layoutPluginsConfig = $config_factory->get('diff.layout_plugins');
   }
 
   /**
@@ -49,7 +43,10 @@ class DiffLayoutManager extends DefaultPluginManager {
    *   The layout plugin options.
    */
   public function getPluginOptions(): array {
-    $plugins = $this->config->get('general_settings.layout_plugins');
+    $plugins = $this
+      ->configFactory
+      ->get('diff.settings')
+      ->get('general_settings.layout_plugins');
     $plugin_options = [];
     // Get the plugins sorted and build an array keyed by the plugin id.
     if ($plugins) {