Make getSupportedCodeFixes on LS so it can be proxied by plugins

src/harness/client.ts

@@ -31,6 +31,7 @@ import {
     FormatCodeOptions,
     FormatCodeSettings,
     getSnapshotText,
+    getSupportedCodeFixes,
     identity,
     ImplementationLocation,
     InlayHint,
@@ -950,6 +951,10 @@ export class SessionClient implements LanguageService {
         return response.body.map(item => this.convertCallHierarchyOutgoingCall(fileName, item));
     }
 
+    getSupportedCodeFixes(): readonly string[] {
+        return getSupportedCodeFixes();
+    }
+
     getProgram(): Program {
         throw new Error("Program objects are not serializable through the server protocol.");
     }

src/harness/harnessLanguageService.ts

@@ -600,6 +600,9 @@ class LanguageServiceShimProxy implements ts.LanguageService {
     getSpanOfEnclosingComment(fileName: string, position: number, onlyMultiLine: boolean): ts.TextSpan {
         return unwrapJSONCallResult(this.shim.getSpanOfEnclosingComment(fileName, position, onlyMultiLine));
     }
+    getSupportedCodeFixes(): never {
+        throw new Error("Not supported on the shim.");
+    }
     getCodeFixesAtPosition(): never {
         throw new Error("Not supported on the shim.");
     }

src/server/protocol.ts

@@ -840,6 +840,7 @@ export interface FileLocationRequest extends FileRequest {
  */
 export interface GetSupportedCodeFixesRequest extends Request {
     command: CommandTypes.GetSupportedCodeFixes;
+    arguments?: Partial<FileRequestArgs>;
 }
 
 /**

src/server/session.ts

@@ -2640,8 +2640,15 @@ export class Session<TMessage = string> implements EventSender {
         }
     }
 
-    private getSupportedCodeFixes(): string[] {
-        return getSupportedCodeFixes();
+    private getSupportedCodeFixes(args: Partial<protocol.FileRequestArgs> | undefined): readonly string[] {
+        if (!args) return getSupportedCodeFixes(); // Compatibility
+        if (args.file) {
+            const { file, project } = this.getFileAndProject(args as protocol.FileRequestArgs);
+            return project.getLanguageService().getSupportedCodeFixes(file);
+        }
+        const project = this.getProject(args.projectFileName);
+        if (!project) Errors.ThrowNoProject();
+        return project.getLanguageService().getSupportedCodeFixes();
     }
 
     private isLocation(locationOrSpan: protocol.FileLocationOrRangeRequestArgs): locationOrSpan is protocol.FileLocationRequestArgs {
@@ -3419,8 +3426,8 @@ export class Session<TMessage = string> implements EventSender {
         [CommandNames.ApplyCodeActionCommand]: (request: protocol.ApplyCodeActionCommandRequest) => {
             return this.requiredResponse(this.applyCodeActionCommand(request.arguments));
         },
-        [CommandNames.GetSupportedCodeFixes]: () => {
-            return this.requiredResponse(this.getSupportedCodeFixes());
+        [CommandNames.GetSupportedCodeFixes]: (request: protocol.GetSupportedCodeFixesRequest) => {
+            return this.requiredResponse(this.getSupportedCodeFixes(request.arguments));
         },
         [CommandNames.GetApplicableRefactors]: (request: protocol.GetApplicableRefactorsRequest) => {
             return this.requiredResponse(this.getApplicableRefactors(request.arguments));

src/services/codeFixProvider.ts

@@ -61,7 +61,7 @@ export function registerCodeFix(reg: CodeFixRegistration) {
 }
 
 /** @internal */
-export function getSupportedErrorCodes(): string[] {
+export function getSupportedErrorCodes(): readonly string[] {
     return arrayFrom(errorCodeToFixes.keys());
 }
 

src/services/services.ts

@@ -1512,7 +1512,8 @@ const invalidOperationsInPartialSemanticMode: readonly (keyof LanguageService)[]
     "prepareCallHierarchy",
     "provideCallHierarchyIncomingCalls",
     "provideCallHierarchyOutgoingCalls",
-    "provideInlayHints"
+    "provideInlayHints",
+    "getSupportedCodeFixes",
 ];
 
 const invalidOperationsInSyntacticMode: readonly (keyof LanguageService)[] = [
@@ -3046,6 +3047,7 @@ export function createLanguageService(
         commentSelection,
         uncommentSelection,
         provideInlayHints,
+        getSupportedCodeFixes,
     };
 
     switch (languageServiceMode) {

src/services/types.ts

@@ -657,6 +657,8 @@ export interface LanguageService {
     commentSelection(fileName: string, textRange: TextRange): TextChange[];
     uncommentSelection(fileName: string, textRange: TextRange): TextChange[];
 
+    getSupportedCodeFixes(fileName?: string): readonly string[];
+
     dispose(): void;
 }
 

src/testRunner/unittests/tsserver/plugins.ts

@@ -159,4 +159,73 @@ describe("unittests:: tsserver:: plugins loading", () => {
 
         baselineTsserverLogs("plugins", "gets external files with config file reload", session);
     });
+});
+
+describe("unittests:: tsserver:: plugins overriding getSupportedCodeFixes", () => {
+    it("getSupportedCodeFixes can be proxied", () => {
+        const aTs: File = {
+            path: "/a.ts",
+            content: `class c { prop = "hello"; foo() { const x = 0; } }`
+        };
+        const bTs: File = {
+            path: "/b.ts",
+            content: aTs.content
+        };
+        const cTs: File = {
+            path: "/c.ts",
+            content: aTs.content
+        };
+        const config: File = {
+            path: "/tsconfig.json",
+            content: JSON.stringify({
+                compilerOptions: { plugins: [{ name: "myplugin" }] }
+            })
+        };
+        const host = createServerHost([aTs, bTs, cTs, config, libFile]);
+        host.require = () => {
+            return {
+                module: () => ({
+                    create(info: ts.server.PluginCreateInfo) {
+                        const proxy = Harness.LanguageService.makeDefaultProxy(info);
+                        proxy.getSupportedCodeFixes = (fileName) => {
+                            switch (fileName) {
+                                case "/a.ts":
+                                    return ["a"];
+                                case "/b.ts":
+                                    return ["b"];
+                                default:
+                                    return info.languageService.getSupportedCodeFixes(fileName);
+                            }
+                        };
+                        return proxy;
+                    }
+                }),
+                error: undefined
+            };
+        };
+        const session = createSession(host, { logger: createLoggerWithInMemoryLogs(host) });
+        openFilesForSession([aTs, bTs, cTs], session);
+        // Without arguments
+        session.executeCommandSeq<ts.server.protocol.GetSupportedCodeFixesRequest>({
+            command: ts.server.protocol.CommandTypes.GetSupportedCodeFixes,
+        });
+        session.executeCommandSeq<ts.server.protocol.GetSupportedCodeFixesRequest>({
+            command: ts.server.protocol.CommandTypes.GetSupportedCodeFixes,
+            arguments: { file: aTs.path }
+        });
+        session.executeCommandSeq<ts.server.protocol.GetSupportedCodeFixesRequest>({
+            command: ts.server.protocol.CommandTypes.GetSupportedCodeFixes,
+            arguments: { file: bTs.path }
+        });
+        session.executeCommandSeq<ts.server.protocol.GetSupportedCodeFixesRequest>({
+            command: ts.server.protocol.CommandTypes.GetSupportedCodeFixes,
+            arguments: { file: cTs.path }
+        });
+        session.executeCommandSeq<ts.server.protocol.GetSupportedCodeFixesRequest>({
+            command: ts.server.protocol.CommandTypes.GetSupportedCodeFixes,
+            arguments: { projectFileName: config.path }
+        });
+
+        baselineTsserverLogs("plugins", "getSupportedCodeFixes can be proxied", session);
+    });
 });

tests/baselines/reference/api/tsserverlibrary.d.ts

@@ -691,6 +691,7 @@ declare namespace ts {
              */
             interface GetSupportedCodeFixesRequest extends Request {
                 command: CommandTypes.GetSupportedCodeFixes;
+                arguments?: Partial<FileRequestArgs>;
             }
             /**
              * A response for GetSupportedCodeFixesRequest request.
@@ -10038,6 +10039,7 @@ declare namespace ts {
         toggleMultilineComment(fileName: string, textRange: TextRange): TextChange[];
         commentSelection(fileName: string, textRange: TextRange): TextChange[];
         uncommentSelection(fileName: string, textRange: TextRange): TextChange[];
+        getSupportedCodeFixes(fileName?: string): readonly string[];
         dispose(): void;
     }
     interface JsxClosingTagInfo {
@@ -11020,7 +11022,7 @@ declare namespace ts {
     function toEditorSettings(options: EditorOptions | EditorSettings): EditorSettings;
     function displayPartsToString(displayParts: SymbolDisplayPart[] | undefined): string;
     function getDefaultCompilerOptions(): CompilerOptions;
-    function getSupportedCodeFixes(): string[];
+    function getSupportedCodeFixes(): readonly string[];
     function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTargetOrOptions: ScriptTarget | CreateSourceFileOptions, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
     function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange | undefined, aggressiveChecks?: boolean): SourceFile;
     function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry, syntaxOnlyOrLanguageServiceMode?: boolean | LanguageServiceMode): LanguageService;

tests/baselines/reference/api/typescript.d.ts

@@ -6178,6 +6178,7 @@ declare namespace ts {
         toggleMultilineComment(fileName: string, textRange: TextRange): TextChange[];
         commentSelection(fileName: string, textRange: TextRange): TextChange[];
         uncommentSelection(fileName: string, textRange: TextRange): TextChange[];
+        getSupportedCodeFixes(fileName?: string): readonly string[];
         dispose(): void;
     }
     interface JsxClosingTagInfo {
@@ -7160,7 +7161,7 @@ declare namespace ts {
     function toEditorSettings(options: EditorOptions | EditorSettings): EditorSettings;
     function displayPartsToString(displayParts: SymbolDisplayPart[] | undefined): string;
     function getDefaultCompilerOptions(): CompilerOptions;
-    function getSupportedCodeFixes(): string[];
+    function getSupportedCodeFixes(): readonly string[];
     function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTargetOrOptions: ScriptTarget | CreateSourceFileOptions, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
     function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange | undefined, aggressiveChecks?: boolean): SourceFile;
     function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry, syntaxOnlyOrLanguageServiceMode?: boolean | LanguageServiceMode): LanguageService;