Add Razor inlay hint and inlay hint resolve handlers

src/lsptoolshost/razorCommands.ts

@@ -23,6 +23,10 @@ import {
     CompletionRequest,
     CompletionResolveRequest,
     CompletionItem,
+    InlayHint,
+    InlayHintResolveRequest,
+    InlayHintParams,
+    InlayHintRequest,
 } from 'vscode-languageclient/node';
 import SerializableSimplifyMethodParams from '../razor/src/simplify/serializableSimplifyMethodParams';
 import { TextEdit } from 'vscode-html-languageservice';
@@ -40,6 +44,8 @@ export const provideSemanticTokensRangeCommand = 'roslyn.provideSemanticTokensRa
 export const roslynSimplifyMethodCommand = 'roslyn.simplifyMethod';
 export const roslynFormatNewFileCommand = 'roslyn.formatNewFile';
 export const razorInitializeCommand = 'razor.initialize';
+export const provideInlayHintsCommand = 'roslyn.provideInlayHints';
+export const resolveInlayHintCommand = 'roslyn.resolveInlayHint';
 
 export function registerRazorCommands(context: vscode.ExtensionContext, languageServer: RoslynLanguageServer) {
     // Razor will call into us (via command) for generated file didChange/didClose notifications. We'll then forward these
@@ -100,6 +106,18 @@ export function registerRazorCommands(context: vscode.ExtensionContext, language
         })
     );
 
+    context.subscriptions.push(
+        vscode.commands.registerCommand(provideInlayHintsCommand, async (request: InlayHintParams) => {
+            return await languageServer.sendRequest(InlayHintRequest.type, request, CancellationToken.None);
+        })
+    );
+
+    context.subscriptions.push(
+        vscode.commands.registerCommand(resolveInlayHintCommand, async (request: InlayHint) => {
+            return await languageServer.sendRequest(InlayHintResolveRequest.type, request, CancellationToken.None);
+        })
+    );
+
     context.subscriptions.push(
         vscode.commands.registerCommand(provideCompletionsCommand, async (request: CompletionParams) => {
             return await languageServer.sendRequest(CompletionRequest.type, request, CancellationToken.None);

src/razor/src/extension.ts

@@ -53,6 +53,8 @@ import { PlatformInformation } from '../../shared/platform';
 import { RazorLanguageServerOptions } from './razorLanguageServerOptions';
 import { resolveRazorLanguageServerOptions } from './razorLanguageServerOptionsResolver';
 import { RazorFormatNewFileHandler } from './formatNewFile/razorFormatNewFileHandler';
+import { InlayHintHandler } from './inlayHint/inlayHintHandler';
+import { InlayHintResolveHandler } from './inlayHint/inlayHintResolveHandler';
 
 // We specifically need to take a reference to a particular instance of the vscode namespace,
 // otherwise providers attempt to operate on the null extension.
@@ -179,6 +181,13 @@ export async function activate(
                 logger
             );
             const foldingRangeHandler = new FoldingRangeHandler(languageServerClient, documentManager, logger);
+            const inlayHintHandler = new InlayHintHandler(
+                languageServerClient,
+                documentManager,
+                documentSynchronizer,
+                logger
+            );
+            const inlayHintResolveHandler = new InlayHintResolveHandler(languageServerClient, documentManager, logger);
             const formattingHandler = new FormattingHandler(
                 documentManager,
                 documentSynchronizer,
@@ -301,6 +310,8 @@ export async function activate(
                 colorPresentationHandler.register(),
                 documentColorHandler.register(),
                 foldingRangeHandler.register(),
+                inlayHintHandler.register(),
+                inlayHintResolveHandler.register(),
                 formattingHandler.register(),
                 semanticTokenHandler.register(),
                 razorDiagnosticHandler.register(),

src/razor/src/inlayHint/inlayHintHandler.ts

@@ -0,0 +1,80 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as vscode from 'vscode';
+import { InlayHint, InlayHintParams, RequestType, TextDocumentIdentifier } from 'vscode-languageclient';
+import { RazorDocumentManager } from '../document/razorDocumentManager';
+import { RazorLanguageServerClient } from '../razorLanguageServerClient';
+import { RazorLogger } from '../razorLogger';
+import { SerializableInlayHintParams } from './serializableInlayHintParams';
+import { provideInlayHintsCommand } from '../../../lsptoolshost/razorCommands';
+import { UriConverter } from '../../../lsptoolshost/uriConverter';
+import { RazorDocumentSynchronizer } from '../document/razorDocumentSynchronizer';
+
+export class InlayHintHandler {
+    private static readonly provideInlayHint = 'razor/inlayHint';
+    private InlayHintRequestType: RequestType<SerializableInlayHintParams, InlayHint[], any> = new RequestType(
+        InlayHintHandler.provideInlayHint
+    );
+    private emptyInlayHintResponse = new Array<InlayHint>();
+
+    constructor(
+        private readonly serverClient: RazorLanguageServerClient,
+        private readonly documentManager: RazorDocumentManager,
+        private readonly documentSynchronizer: RazorDocumentSynchronizer,
+        private readonly logger: RazorLogger
+    ) {}
+
+    public async register() {
+        await this.serverClient.onRequestWithParams<SerializableInlayHintParams, InlayHint[], any>(
+            this.InlayHintRequestType,
+            async (request, token) => this.provideInlayHints(request, token)
+        );
+    }
+
+    private async provideInlayHints(inlayHintParams: SerializableInlayHintParams, token: vscode.CancellationToken) {
+        try {
+            const razorDocumentUri = vscode.Uri.parse(inlayHintParams.identifier.textDocumentIdentifier.uri, true);
+            const razorDocument = await this.documentManager.getDocument(razorDocumentUri);
+            if (razorDocument === undefined) {
+                return this.emptyInlayHintResponse;
+            }
+
+            if (!this.documentManager.roslynActivated) {
+                // Unlike most other handlers, inlay hints works by directly sending an LSP request to Roslyn, so if Roslyn isn't
+                // activated we need to catch that here.
+                return this.emptyInlayHintResponse;
+            }
+
+            const textDocument = await vscode.workspace.openTextDocument(razorDocumentUri);
+            const synchronized = await this.documentSynchronizer.trySynchronizeProjectedDocument(
+                textDocument,
+                razorDocument.csharpDocument,
+                inlayHintParams.identifier.version,
+                token
+            );
+            if (!synchronized) {
+                return this.emptyInlayHintResponse;
+            }
+
+            const virtualCSharpUri = UriConverter.serialize(razorDocument.csharpDocument.uri);
+
+            const roslynInlayHintParams = <InlayHintParams>{
+                textDocument: TextDocumentIdentifier.create(virtualCSharpUri),
+                range: inlayHintParams.projectedRange,
+            };
+            const csharpInlayHints = await vscode.commands.executeCommand<InlayHint[]>(
+                provideInlayHintsCommand,
+                roslynInlayHintParams
+            );
+
+            return csharpInlayHints;
+        } catch (error) {
+            this.logger.logWarning(`${InlayHintHandler.provideInlayHint} failed with ${error}`);
+        }
+
+        return this.emptyInlayHintResponse;
+    }
+}

src/razor/src/inlayHint/inlayHintResolveHandler.ts

@@ -0,0 +1,52 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as vscode from 'vscode';
+import { InlayHint, RequestType } from 'vscode-languageclient';
+import { RazorDocumentManager } from '../document/razorDocumentManager';
+import { RazorLanguageServerClient } from '../razorLanguageServerClient';
+import { RazorLogger } from '../razorLogger';
+import { SerializableInlayHintResolveParams } from './serializableInlayHintResolveParams';
+import { resolveInlayHintCommand } from '../../../lsptoolshost/razorCommands';
+
+export class InlayHintResolveHandler {
+    private static readonly resolveInlayHint = 'razor/inlayHintResolve';
+    private InlayHintResolveRequestType: RequestType<SerializableInlayHintResolveParams, InlayHint | null, any> =
+        new RequestType(InlayHintResolveHandler.resolveInlayHint);
+
+    constructor(
+        private readonly serverClient: RazorLanguageServerClient,
+        private readonly documentManager: RazorDocumentManager,
+        private readonly logger: RazorLogger
+    ) {}
+
+    public async register() {
+        await this.serverClient.onRequestWithParams<SerializableInlayHintResolveParams, InlayHint | null, any>(
+            this.InlayHintResolveRequestType,
+            async (request, token) => this.resolveInlayHint(request, token)
+        );
+    }
+
+    private async resolveInlayHint(InlayHintParams: SerializableInlayHintResolveParams, _: vscode.CancellationToken) {
+        try {
+            const razorDocumentUri = vscode.Uri.parse(InlayHintParams.identifier.textDocumentIdentifier.uri, true);
+            const razorDocument = await this.documentManager.getDocument(razorDocumentUri);
+            if (razorDocument === undefined) {
+                return null;
+            }
+
+            const response = await vscode.commands.executeCommand<InlayHint>(
+                resolveInlayHintCommand,
+                InlayHintParams.inlayHint
+            );
+
+            return response;
+        } catch (error) {
+            this.logger.logWarning(`${InlayHintResolveHandler.resolveInlayHint} failed with ${error}`);
+        }
+
+        return null;
+    }
+}

src/razor/src/inlayHint/serializableInlayHintParams.ts

@@ -0,0 +1,12 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { Range } from 'vscode-languageserver-protocol';
+import { SerializableTextDocumentIdentifierAndVersion } from '../simplify/serializableTextDocumentIdentifierAndVersion';
+
+export interface SerializableInlayHintParams {
+    identifier: SerializableTextDocumentIdentifierAndVersion;
+    projectedRange: Range;
+}

src/razor/src/inlayHint/serializableInlayHintResolveParams.ts

@@ -0,0 +1,12 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { InlayHint } from 'vscode-languageserver-protocol';
+import { SerializableTextDocumentIdentifierAndVersion } from '../simplify/serializableTextDocumentIdentifierAndVersion';
+
+export interface SerializableInlayHintResolveParams {
+    identifier: SerializableTextDocumentIdentifierAndVersion;
+    inlayHint: InlayHint;
+}