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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, 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 library error_group; | 5 library error_group; |
6 | 6 |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 | 8 |
9 import 'utils.dart'; | 9 import 'utils.dart'; |
10 | 10 |
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218 class _ErrorGroupStream extends Stream { | 218 class _ErrorGroupStream extends Stream { |
219 /// The parent [ErrorGroup]. | 219 /// The parent [ErrorGroup]. |
220 final ErrorGroup _group; | 220 final ErrorGroup _group; |
221 | 221 |
222 /// Whether [this] has completed, either successfully or with an error. | 222 /// Whether [this] has completed, either successfully or with an error. |
223 var _isDone = false; | 223 var _isDone = false; |
224 | 224 |
225 /// The underlying [StreamController] for [this]. | 225 /// The underlying [StreamController] for [this]. |
226 final StreamController _controller; | 226 final StreamController _controller; |
227 | 227 |
| 228 /// The controller's [Stream]. May be different than `_controller.stream` if |
| 229 /// the wrapped stream is a broadcasting stream. |
| 230 Stream _stream; |
| 231 |
228 /// The [StreamSubscription] that connects the wrapped [Stream] to | 232 /// The [StreamSubscription] that connects the wrapped [Stream] to |
229 /// [_controller]. | 233 /// [_controller]. |
230 StreamSubscription _subscription; | 234 StreamSubscription _subscription; |
231 | 235 |
232 /// Whether [this] has any listeners. | 236 /// Whether [this] has any listeners. |
233 bool get _hasListeners => _controller.hasListener; | 237 bool get _hasListeners => _controller.hasListener; |
234 | 238 |
235 /// Creates a new [_ErrorGroupFuture] that's a child of [_group] and wraps | 239 /// Creates a new [_ErrorGroupFuture] that's a child of [_group] and wraps |
236 /// [inner]. | 240 /// [inner]. |
237 _ErrorGroupStream(this._group, Stream inner) | 241 _ErrorGroupStream(this._group, Stream inner) |
238 : _controller = inner.isBroadcast ? | 242 : _controller = new StreamController() { |
239 new StreamController.broadcast() : | 243 this.stream = isBroadcast |
240 new StreamController() { | 244 ? _controller.stream.asBroadcastStream() |
| 245 : _controller.stream; |
241 _subscription = inner.listen((v) { | 246 _subscription = inner.listen((v) { |
242 _controller.add(v); | 247 _controller.add(v); |
243 }, onError: (e) { | 248 }, onError: (e) { |
244 _group._signalError(e); | 249 _group._signalError(e); |
245 }, onDone: () { | 250 }, onDone: () { |
246 _isDone = true; | 251 _isDone = true; |
247 _group._signalStreamComplete(this); | 252 _group._signalStreamComplete(this); |
248 _controller.close(); | 253 _controller.close(); |
249 }); | 254 }); |
250 } | 255 } |
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263 void _signalError(AsyncError e) { | 268 void _signalError(AsyncError e) { |
264 if (_isDone) return; | 269 if (_isDone) return; |
265 _subscription.cancel(); | 270 _subscription.cancel(); |
266 // Call these asynchronously to work around issue 7913. | 271 // Call these asynchronously to work around issue 7913. |
267 new Future.immediate(null).then((_) { | 272 new Future.immediate(null).then((_) { |
268 _controller.addError(e.error, e.stackTrace); | 273 _controller.addError(e.error, e.stackTrace); |
269 _controller.close(); | 274 _controller.close(); |
270 }); | 275 }); |
271 } | 276 } |
272 } | 277 } |
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