| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| abstract class Timer { |
| /** |
| * Creates a new timer. The [callback] callback is invoked after |
| * [milliSeconds] milliseconds. |
| */ |
| factory Timer(int milliSeconds, void callback(Timer timer)) { |
| if (_TimerFactory._factory == null) { |
| throw new UnsupportedError("Timer interface not supported."); |
| } |
| return _TimerFactory._factory(milliSeconds, callback, false); |
| } |
| |
| /** |
| * Creates a new repeating timer. The [callback] is invoked every |
| * [milliSeconds] millisecond until cancelled. |
| */ |
| factory Timer.repeating(int milliSeconds, void callback(Timer timer)) { |
| if (_TimerFactory._factory == null) { |
| throw new UnsupportedError("Timer interface not supported."); |
| } |
| return _TimerFactory._factory(milliSeconds, callback, true); |
| } |
| |
| /** |
| * Cancels the timer. |
| */ |
| void cancel(); |
| } |
| |
| // TODO(ajohnsen): Patch timer once we have support for patching named |
| // factory constructors in the VM. |
| |
| typedef Timer _TimerFactoryClosure(int milliSeconds, |
| void callback(Timer timer), |
| bool repeating); |
| |
| class _TimerFactory { |
| static _TimerFactoryClosure _factory; |
| } |
| |
| // TODO(ahe): Warning: this is NOT called by Dartium. Instead, it sets |
| // [_TimerFactory._factory] directly. |
| void _setTimerFactoryClosure(_TimerFactoryClosure closure) { |
| _TimerFactory._factory = closure; |
| } |