Fix issue with Rename UI lingering after cancellation (#12796)

Author: Colengms

Diff for: Extension/src/LanguageServer/Providers/callHierarchyProvider.ts

@@ -51,12 +51,6 @@ export interface CallHierarchyParams {
 
 interface CallHierarchyItemResult {
     item?: CallHierarchyItem;
-
-    /**
-     * If a request is cancelled, `succeeded` will be undefined to indicate no result was returned.
-     * Therefore, object is not defined as optional on the language server.
-     */
-    succeeded: boolean;
 }
 
 interface CallHierarchyCallsItem {
@@ -137,25 +131,23 @@ export class CallHierarchyProvider implements vscode.CallHierarchyProvider {
             }
             throw e;
         }
-        cancellationTokenListener.dispose();
-        requestCanceledListener.dispose();
+        finally {
+            cancellationTokenListener.dispose();
+            requestCanceledListener.dispose();
+        }
 
-        if (cancelSource.token.isCancellationRequested || response.succeeded === undefined) {
-            // Return undefined instead of vscode.CancellationError to avoid the following error message from VS Code:
-            // "MISSING provider."
-            // TODO: per issue https://github.com/microsoft/vscode/issues/169698 vscode.CancellationError is expected,
-            // so when VS Code fixes the error use vscode.CancellationError again.
-            return undefined;
-        } else if (response.item === undefined) {
+        if (cancelSource.token.isCancellationRequested) {
+            throw new vscode.CancellationError();
+        }
+        if (response.item === undefined) {
             return undefined;
         }
 
         this.isEntryRootNodeTelemetry = true;
         return this.makeVscodeCallHierarchyItem(response.item);
     }
 
-    public async provideCallHierarchyIncomingCalls(item: vscode.CallHierarchyItem, token: vscode.CancellationToken):
-    Promise<vscode.CallHierarchyIncomingCall[] | undefined> {
+    public async provideCallHierarchyIncomingCalls(item: vscode.CallHierarchyItem, token: vscode.CancellationToken): Promise<vscode.CallHierarchyIncomingCall[] | undefined> {
         await this.client.ready;
         workspaceReferences.cancelCurrentReferenceRequest(CancellationSender.NewRequest);
 
@@ -215,8 +207,7 @@ export class CallHierarchyProvider implements vscode.CallHierarchyProvider {
         return result;
     }
 
-    public async provideCallHierarchyOutgoingCalls(item: vscode.CallHierarchyItem, token: vscode.CancellationToken):
-    Promise<vscode.CallHierarchyOutgoingCall[] | undefined> {
+    public async provideCallHierarchyOutgoingCalls(item: vscode.CallHierarchyItem, token: vscode.CancellationToken): Promise<vscode.CallHierarchyOutgoingCall[] | undefined> {
         const CallHierarchyCallsFromEvent: string = "CallHierarchyCallsFrom";
         if (item === undefined) {
             this.logTelemetry(CallHierarchyCallsFromEvent, CallHierarchyRequestStatus.Failed);

Diff for: Extension/src/LanguageServer/Providers/findAllReferencesProvider.ts

@@ -45,11 +45,12 @@ export class FindAllReferencesProvider implements vscode.ReferenceProvider {
                 throw e;
             }
         }
-
-        // Reset anything that can be cleared before processing the result.
-        workspaceReferences.resetProgressBar();
-        cancellationTokenListener.dispose();
-        requestCanceledListener.dispose();
+        finally {
+            // Reset anything that can be cleared before processing the result.
+            workspaceReferences.resetProgressBar();
+            cancellationTokenListener.dispose();
+            requestCanceledListener.dispose();
+        }
 
         // Process the result.
         if (cancelSource.token.isCancellationRequested || cancelled || (response && response.isCanceled)) {

Diff for: Extension/src/LanguageServer/Providers/renameProvider.ts

@@ -57,11 +57,12 @@ export class RenameProvider implements vscode.RenameProvider {
             }
             throw e;
         }
-
-        // Reset anything that can be cleared before processing the result.
-        workspaceReferences.resetProgressBar();
-        workspaceReferences.resetReferences();
-        requestCanceledListener.dispose();
+        finally {
+            // Reset anything that can be cleared before processing the result.
+            workspaceReferences.resetProgressBar();
+            workspaceReferences.resetReferences();
+            requestCanceledListener.dispose();
+        }
 
         // Process the result.
         if (cancelSource.token.isCancellationRequested || response.isCanceled) {