Hot exit: untitled backup is not made when opening new untitled with initial content (fix #86891)

src/vs/workbench/contrib/backup/common/backupModelTracker.ts

@@ -37,6 +37,7 @@ export class BackupModelTracker extends Disposable implements IWorkbenchContribu
 		this._register(this.textFileService.models.onModelDisposed(e => this.discardBackup(e)));
 
 		// Listen for untitled model changes
+		this._register(this.untitledTextEditorService.onDidCreate(e => this.onUntitledModelChanged(e)));
 		this._register(this.untitledTextEditorService.onDidChangeContent(e => this.onUntitledModelChanged(e)));
 		this._register(this.untitledTextEditorService.onDidDisposeModel(e => this.discardBackup(e)));
 

src/vs/workbench/services/untitled/common/untitledTextEditorService.ts

@@ -31,6 +31,11 @@ export interface IUntitledTextEditorService {
 
 	_serviceBrand: undefined;
 
+	/**
+	 * Events for when untitled text editors are created.
+	 */
+	readonly onDidCreate: Event<URI>;
+
 	/**
 	 * Events for when untitled text editors content changes (e.g. any keystroke).
 	 */
@@ -117,6 +122,9 @@ export class UntitledTextEditorService extends Disposable implements IUntitledTe
 	private mapResourceToInput = new ResourceMap<UntitledTextEditorInput>();
 	private mapResourceToAssociatedFilePath = new ResourceMap<boolean>();
 
+	private readonly _onDidCreate = this._register(new Emitter<URI>());
+	readonly onDidCreate = this._onDidCreate.event;
+
 	private readonly _onDidChangeContent = this._register(new Emitter<URI>());
 	readonly onDidChangeContent = this._onDidChangeContent.event;
 
@@ -263,6 +271,9 @@ export class UntitledTextEditorService extends Disposable implements IUntitledTe
 		// Add to cache
 		this.mapResourceToInput.set(untitledResource, input);
 
+		// Signal new untitled as event
+		this._onDidCreate.fire(untitledResource);
+
 		return input;
 	}
 

src/vs/workbench/test/common/editor/untitledTextEditor.test.ts

@@ -54,11 +54,20 @@ suite('Workbench untitled text editors', () => {
 
 		assert.equal(service.getAll().length, 0);
 
+		let createdResources: URI[] = [];
+		const createListener = service.onDidCreate(resource => {
+			createdResources.push(resource);
+		});
+
 		const input1 = service.createOrGet();
 		assert.equal(input1, service.createOrGet(input1.getResource()));
 
 		assert.ok(service.exists(input1.getResource()));
 		assert.ok(!service.exists(URI.file('testing')));
+		assert.equal(createdResources.length, 1);
+		assert.equal(createdResources[0].toString(), input1.getResource());
+
+		createListener.dispose();
 
 		const input2 = service.createOrGet();