Port semantic tokens range endpoint to cohost server

src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/Extensions/IServiceCollectionExtensions.cs

@@ -120,16 +120,19 @@ public static void AddHoverServices(this IServiceCollection services)
         services.AddSingleton<IHoverInfoService, HoverInfoService>();
     }
 
-    public static void AddSemanticTokensServices(this IServiceCollection services)
+    public static void AddSemanticTokensServices(this IServiceCollection services, LanguageServerFeatureOptions featureOptions)
     {
-        services.AddHandlerWithCapabilities<SemanticTokensRangeEndpoint>();
+        if (!featureOptions.UseRazorCohostServer)
+        {
+            services.AddHandlerWithCapabilities<SemanticTokensRangeEndpoint>();
+            // Ensure that we don't add the default service if something else has added one.
+            services.TryAddSingleton<IRazorSemanticTokensInfoService, RazorSemanticTokensInfoService>();
+        }
+
         services.AddHandler<RazorSemanticTokensRefreshEndpoint>();
 
         services.AddSingleton<WorkspaceSemanticTokensRefreshPublisher, DefaultWorkspaceSemanticTokensRefreshPublisher>();
         services.AddSingleton<IProjectSnapshotChangeTrigger, DefaultWorkspaceSemanticTokensRefreshTrigger>();
-
-        // Ensure that we don't add the default service if something else has added one.
-        services.TryAddSingleton<IRazorSemanticTokensInfoService, RazorSemanticTokensInfoService>();
     }
 
     public static void AddCodeActionsServices(this IServiceCollection services)

src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/RazorLanguageServer.cs

@@ -153,7 +153,7 @@ protected override ILspServices ConstructLspServices()
         services.AddLifeCycleServices(this, _clientConnection, _lspServerActivationTracker);
 
         services.AddDiagnosticServices();
-        services.AddSemanticTokensServices();
+        services.AddSemanticTokensServices(featureOptions);
         services.AddDocumentManagementServices(featureOptions);
         services.AddCompletionServices(featureOptions);
         services.AddFormattingServices();