Disable auto saving of untitled notebooks

src/vs/workbench/contrib/notebook/browser/notebookEditorInput.ts

@@ -70,6 +70,10 @@ export class NotebookEditorInput extends EditorInput {
 		return this.textModel?.isDirty() || false;
 	}
 
+	isUntitled(): boolean {
+		return this.textModel?.isUntitled() || false;
+	}
+
 	isReadonly() {
 		return false;
 	}

src/vs/workbench/contrib/notebook/common/notebookCommon.ts

@@ -568,6 +568,7 @@ export interface INotebookEditorModel extends IEditorModel {
 	readonly viewType: string;
 	readonly notebook: NotebookTextModel;
 	isDirty(): boolean;
+	isUntitled(): boolean;
 	save(): Promise<boolean>;
 	saveAs(target: URI): Promise<boolean>;
 	revert(options?: IRevertOptions | undefined): Promise<void>;

src/vs/workbench/contrib/notebook/common/notebookEditorModel.ts

@@ -12,7 +12,7 @@ import { ResourceMap } from 'vs/base/common/map';
 import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
 import { INotebookService } from 'vs/workbench/contrib/notebook/common/notebookService';
 import { URI } from 'vs/base/common/uri';
-import { IWorkingCopyService, IWorkingCopy, IWorkingCopyBackup } from 'vs/workbench/services/workingCopy/common/workingCopyService';
+import { IWorkingCopyService, IWorkingCopy, IWorkingCopyBackup, WorkingCopyCapabilities } from 'vs/workbench/services/workingCopy/common/workingCopyService';
 import { basename } from 'vs/base/common/resources';
 import { CancellationTokenSource } from 'vs/base/common/cancellation';
 import { IBackupFileService } from 'vs/workbench/services/backup/common/backup';
@@ -71,7 +71,7 @@ export class NotebookEditorModel extends EditorModel implements IWorkingCopy, IN
 		const workingCopyAdapter = new class implements IWorkingCopy {
 			readonly resource = input._workingCopyResource;
 			get name() { return input.name; }
-			readonly capabilities = input.capabilities;
+			readonly capabilities = input.isUntitled() ? WorkingCopyCapabilities.Untitled : input.capabilities;
 			readonly onDidChangeDirty = input.onDidChangeDirty;
 			readonly onDidChangeContent = input.onDidChangeContent;
 			isDirty(): boolean { return input.isDirty(); }
@@ -211,6 +211,10 @@ export class NotebookEditorModel extends EditorModel implements IWorkingCopy, IN
 		return this._dirty;
 	}
 
+	isUntitled() {
+		return this.resource.scheme === Schemas.untitled;
+	}
+
 	async save(): Promise<boolean> {
 		const tokenSource = new CancellationTokenSource();
 		await this.notebookService.save(this.notebook.viewType, this.notebook.uri, tokenSource.token);

src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts

@@ -23,6 +23,7 @@ import { CellKind, CellUri, INotebookEditorModel, IProcessedOutput, NotebookCell
 import { Webview } from 'vs/workbench/contrib/webview/browser/webview';
 import { ICompositeCodeEditor, IEditor } from 'vs/editor/common/editorCommon';
 import { NotImplementedError } from 'vs/base/common/errors';
+import { Schemas } from 'vs/base/common/network';
 
 export class TestCell extends NotebookCellTextModel {
 	constructor(
@@ -273,6 +274,10 @@ export class NotebookEditorTestModel extends EditorModel implements INotebookEdi
 		return this._dirty;
 	}
 
+	isUntitled() {
+		return this._notebook.uri.scheme === Schemas.untitled;
+	}
+
 	getNotebook(): NotebookTextModel {
 		return this._notebook;
 	}