wip: basic list dnd with animation

src/vs/base/browser/dom.ts

@@ -11,7 +11,7 @@ import { TimeoutTimer } from 'vs/base/common/async';
 import { CharCode } from 'vs/base/common/charCode';
 import { onUnexpectedError } from 'vs/base/common/errors';
 import { Emitter, Event } from 'vs/base/common/event';
-import { Disposable, IDisposable, dispose } from 'vs/base/common/lifecycle';
+import { Disposable, IDisposable, dispose, toDisposable } from 'vs/base/common/lifecycle';
 import * as platform from 'vs/base/common/platform';
 import { coalesce } from 'vs/base/common/arrays';
 
@@ -1157,3 +1157,18 @@ export function windowOpenNoOpener(url: string): void {
 		}
 	}
 }
+
+export function animate(fn: () => void): IDisposable {
+	const step = () => {
+		fn();
+		stepDisposable = scheduleAtNextAnimationFrame(step);
+	};
+
+	let stepDisposable = scheduleAtNextAnimationFrame(step);
+	return toDisposable(() => stepDisposable.dispose());
+}
+
+export function timeout(fn: () => void, millis: number): IDisposable {
+	const timer = setTimeout(fn, millis);
+	return toDisposable(() => clearTimeout(timer));
+}