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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of dart.async; | 5 part of dart.async; |
6 | 6 |
7 // ------------------------------------------------------------------- | 7 // ------------------------------------------------------------------- |
8 // Default implementation of a stream with a controller for adding | 8 // Default implementation of a stream with a controller for adding |
9 // events to the stream. | 9 // events to the stream. |
10 // ------------------------------------------------------------------- | 10 // ------------------------------------------------------------------- |
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49 /** | 49 /** |
50 * A controller with a [stream] that supports only one single subscriber. | 50 * A controller with a [stream] that supports only one single subscriber. |
51 * The controller will buffer all incoming events until the subscriber is | 51 * The controller will buffer all incoming events until the subscriber is |
52 * registered. | 52 * registered. |
53 */ | 53 */ |
54 StreamController.singleSubscription() { | 54 StreamController.singleSubscription() { |
55 _stream = new _SingleControllerStream<T>(onSubscriptionStateChange, | 55 _stream = new _SingleControllerStream<T>(onSubscriptionStateChange, |
56 onPauseStateChange); | 56 onPauseStateChange); |
57 } | 57 } |
58 | 58 |
| 59 bool get isSingleSubscription => _stream.isSingleSubscription; |
| 60 |
59 StreamSubscription listen(void onData(T data), | 61 StreamSubscription listen(void onData(T data), |
60 { void onError(AsyncError error), | 62 { void onError(AsyncError error), |
61 void onDone(), | 63 void onDone(), |
62 bool unsubscribeOnError}) { | 64 bool unsubscribeOnError}) { |
63 return _stream.listen(onData, | 65 return _stream.listen(onData, |
64 onError: onError, | 66 onError: onError, |
65 onDone: onDone, | 67 onDone: onDone, |
66 unsubscribeOnError: unsubscribeOnError); | 68 unsubscribeOnError: unsubscribeOnError); |
67 } | 69 } |
68 | 70 |
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163 _SingleControllerStream(this._subscriptionHandler, this._pauseHandler); | 165 _SingleControllerStream(this._subscriptionHandler, this._pauseHandler); |
164 | 166 |
165 void _onSubscriptionStateChange() { | 167 void _onSubscriptionStateChange() { |
166 _subscriptionHandler(); | 168 _subscriptionHandler(); |
167 } | 169 } |
168 | 170 |
169 void _onPauseStateChange() { | 171 void _onPauseStateChange() { |
170 _pauseHandler(); | 172 _pauseHandler(); |
171 } | 173 } |
172 } | 174 } |
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