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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, 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 /** | 5 /** |
6 * The StringBuffer class is useful for concatenating strings | 6 * The StringBuffer class is useful for concatenating strings |
7 * efficiently. Only on a call to [toString] are the strings | 7 * efficiently. Only on a call to [toString] are the strings |
8 * concatenated to a single String. | 8 * concatenated to a single String. |
9 */ | 9 */ |
10 class StringBuffer implements OutputStream { | 10 class StringBuffer implements OutputStream { |
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42 * Returns the length of the buffer. | 42 * Returns the length of the buffer. |
43 */ | 43 */ |
44 int get length { | 44 int get length { |
45 return length_; | 45 return length_; |
46 } | 46 } |
47 | 47 |
48 /** | 48 /** |
49 * Appends [str] to the buffer. | 49 * Appends [str] to the buffer. |
50 */ | 50 */ |
51 void append(String str) { | 51 void append(String str) { |
52 if (str === null || str.isEmpty) return; | 52 if (str == null || str.isEmpty) return; |
53 buffer_.add(str); | 53 buffer_.add(str); |
54 length_ += str.length; | 54 length_ += str.length; |
55 } | 55 } |
56 | 56 |
57 /** | 57 /** |
58 * Appends all items in [strings] to the buffer. | 58 * Appends all items in [strings] to the buffer. |
59 */ | 59 */ |
60 void appendAll(Collection<String> strings) { | 60 void appendAll(Collection<String> strings) { |
61 strings.forEach((str) { append(str); }); | 61 strings.forEach((str) { append(str); }); |
62 } | 62 } |
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80 buffer_.add(result); | 80 buffer_.add(result); |
81 // Since we track the length at each append operation, there is no | 81 // Since we track the length at each append operation, there is no |
82 // need to update it in this function. | 82 // need to update it in this function. |
83 return result; | 83 return result; |
84 } | 84 } |
85 | 85 |
86 GrowableArray<String> buffer_; | 86 GrowableArray<String> buffer_; |
87 int length_; | 87 int length_; |
88 final bool closed = false; | 88 final bool closed = false; |
89 } | 89 } |
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