Add clear method on DisposableStore

`clear` disposes of all tracked disposables but does not mark the store itself as disposed. If you need a mutatable list of disposables, this allows you to always use `readonly`/`const` disposable stores that can be registered on the base class.

src/vs/base/common/lifecycle.ts

@@ -46,8 +46,20 @@ export class DisposableStore implements IDisposable {
 	private _toDispose: IDisposable[] = [];
 	private _isDisposed = false;
 
+	/**
+	 * Dispose of all registered disposables and mark this object as disposed.
+	 *
+	 * Any future disposables added to this object will be disposed of on `push`.
+	 */
 	public dispose(): void {
 		this._isDisposed = true;
+		this.clear();
+	}
+
+	/**
+	 * Dispose of all registered disposables but do not mark this object as disposed.
+	 */
+	public clear(): void {
 		this._toDispose = dispose(this._toDispose);
 	}
 

src/vs/editor/contrib/hover/hover.ts

@@ -34,7 +34,7 @@ export class ModesHoverController implements IEditorContribution {
 
 	private static readonly ID = 'editor.contrib.hover';
 
-	private _toUnhook = new DisposableStore();
+	private readonly _toUnhook = new DisposableStore();
 	private readonly _didChangeConfigurationHandler: IDisposable;
 
 	private _contentWidget: ModesContentHoverWidget;
@@ -109,8 +109,7 @@ export class ModesHoverController implements IEditorContribution {
 	}
 
 	private _unhookEvents(): void {
-		this._toUnhook.dispose();
-		this._toUnhook = new DisposableStore();
+		this._toUnhook.clear();
 	}
 
 	private _onModelDecorationsChanged(): void {
@@ -226,6 +225,7 @@ export class ModesHoverController implements IEditorContribution {
 
 	public dispose(): void {
 		this._unhookEvents();
+		this._toUnhook.dispose();
 		this._didChangeConfigurationHandler.dispose();
 
 		if (this._glyphWidget) {

src/vs/workbench/contrib/comments/browser/commentFormActions.ts

@@ -6,14 +6,14 @@
 import * as DOM from 'vs/base/browser/dom';
 import { Button } from 'vs/base/browser/ui/button/button';
 import { IAction } from 'vs/base/common/actions';
-import { DisposableStore } from 'vs/base/common/lifecycle';
+import { DisposableStore, IDisposable } from 'vs/base/common/lifecycle';
 import { IMenu } from 'vs/platform/actions/common/actions';
 import { attachButtonStyler } from 'vs/platform/theme/common/styler';
 import { IThemeService } from 'vs/platform/theme/common/themeService';
 
-export class CommentFormActions {
+export class CommentFormActions implements IDisposable {
 	private _buttonElements: HTMLElement[] = [];
-	private _toDispose = new DisposableStore();
+	private readonly _toDispose = new DisposableStore();
 
 	constructor(
 		private container: HTMLElement,
@@ -22,8 +22,7 @@ export class CommentFormActions {
 	) { }
 
 	setActions(menu: IMenu) {
-		this._toDispose.dispose();
-		this._toDispose = new DisposableStore();
+		this._toDispose.clear();
 
 		this._buttonElements.forEach(b => DOM.removeNode(b));
 
@@ -44,4 +43,8 @@ export class CommentFormActions {
 			});
 		}
 	}
+
+	dispose() {
+		this._toDispose.dispose();
+	}
 }

src/vs/workbench/contrib/scm/browser/dirtydiffDecorator.ts

@@ -960,7 +960,7 @@ export class DirtyDiffModel extends Disposable {
 	private diffDelayer: ThrottledDelayer<IChange[] | null> | null;
 	private _originalURIPromise?: Promise<URI | null>;
 	private repositoryDisposables = new Set<IDisposable>();
-	private originalModelDisposables: IDisposable = Disposable.None;
+	private readonly originalModelDisposables = this._register(new DisposableStore());
 
 	private _onDidChange = new Emitter<ISplice<IChange>[]>();
 	readonly onDidChange: Event<ISplice<IChange>[]> = this._onDidChange.event;
@@ -1069,12 +1069,9 @@ export class DirtyDiffModel extends Disposable {
 
 				this._originalModel = ref.object.textEditorModel;
 
-				const originalModelDisposables = new DisposableStore();
-				originalModelDisposables.push(ref);
-				originalModelDisposables.push(ref.object.textEditorModel.onDidChangeContent(() => this.triggerDiff()));
-
-				this.originalModelDisposables.dispose();
-				this.originalModelDisposables = originalModelDisposables;
+				this.originalModelDisposables.clear();
+				this.originalModelDisposables.push(ref);
+				this.originalModelDisposables.push(ref.object.textEditorModel.onDidChangeContent(() => this.triggerDiff()));
 
 				return originalUri;
 			});
@@ -1131,7 +1128,6 @@ export class DirtyDiffModel extends Disposable {
 	}
 
 	dispose(): void {
-		this.originalModelDisposables = dispose(this.originalModelDisposables);
 		super.dispose();
 
 		this._editorModel = null;

src/vs/workbench/contrib/snippets/browser/snippetsService.ts

@@ -295,10 +295,10 @@ class SnippetsService implements ISnippetsService {
 	}
 
 	private _initFolderSnippets(source: SnippetSource, folder: URI, bucket: IDisposable[]): Promise<any> {
-		let disposables = new DisposableStore();
-		let addFolderSnippets = (type?: FileChangeType) => {
-			disposables.dispose();
-			disposables = new DisposableStore();
+		const disposables = new DisposableStore();
+		const addFolderSnippets = (type?: FileChangeType) => {
+			disposables.clear();
+
 			if (type === FileChangeType.DELETED) {
 				return Promise.resolve();
 			}

src/vs/workbench/contrib/webview/browser/webviewEditor.ts

@@ -33,7 +33,7 @@ export class WebviewEditor extends BaseEditor {
 	private _content?: HTMLElement;
 	private _webviewContent: HTMLElement | undefined;
 
-	private _webviewFocusTrackerDisposables = new DisposableStore();
+	private readonly _webviewFocusTrackerDisposables = new DisposableStore();
 	private _onFocusWindowHandler?: IDisposable;
 
 	private readonly _onDidFocusWebview = this._register(new Emitter<void>());
@@ -304,8 +304,7 @@ export class WebviewEditor extends BaseEditor {
 	}
 
 	private trackFocus() {
-		this._webviewFocusTrackerDisposables.dispose();
-		this._webviewFocusTrackerDisposables = new DisposableStore();
+		this._webviewFocusTrackerDisposables.clear();
 
 		// Track focus in webview content
 		const webviewContentFocusTracker = DOM.trackFocus(this._webviewContent!);

src/vs/workbench/services/files/test/node/diskFileService.test.ts

@@ -125,7 +125,7 @@ suite('Disk File Service', () => {
 	let testProvider: TestDiskFileSystemProvider;
 	let testDir: string;
 
-	let disposables = new DisposableStore();
+	const disposables = new DisposableStore();
 
 	setup(async () => {
 		const logService = new NullLogService();
@@ -149,8 +149,7 @@ suite('Disk File Service', () => {
 	});
 
 	teardown(async () => {
-		disposables.dispose();
-		disposables = new DisposableStore();
+		disposables.clear();
 
 		await rimraf(parentDir, RimRafMode.MOVE);
 	});