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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 | |
3 // BSD-style license that can be found in the LICENSE file. | |
4 | |
5 library trydart.compilationUnit; | |
6 | |
7 import 'dart:async' show | |
8 Stream, | |
9 StreamController; | |
10 | |
11 class CompilationUnitData { | |
12 final String name; | |
13 String content; | |
14 | |
15 CompilationUnitData(this.name, this.content); | |
16 } | |
17 | |
18 class CompilationUnit extends CompilationUnitData { | |
19 // Extending [CompilationUnitData] allows this class to hide the storage | |
20 // allocated for [content] without introducing new names. The conventional | |
21 // way of acheiving this is to introduce a library-private field, but library | |
22 // privacy isn't without problems. | |
23 | |
24 static StreamController<CompilationUnit> controller = | |
25 new StreamController<CompilationUnit>(sync: false); | |
26 | |
27 static Stream<CompilationUnit> get onChanged => controller.stream; | |
28 | |
29 CompilationUnit(String name, String content) | |
30 : super(name, content); | |
31 | |
32 void set content(String newContent) { | |
33 if (content != newContent) { | |
34 super.content = newContent; | |
35 controller.add(this); | |
36 } | |
37 } | |
38 } | |
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