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Issue 2850783002: Dart SDK Spelling b, c, and d. (Closed)
Patch Set: Created 3 years, 7 months ago
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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 part of observable; 5 part of observable;
6 6
7 /** 7 /**
8 * Accumulates change events from several observable objects. 8 * Accumulates change events from several observable objects.
9 * 9 *
10 * wrap() is public and used by client code. The other methods are used by 10 * wrap() is public and used by client code. The other methods are used by
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24 /** Whether this batch is currently firing and therefore is sealed. */ 24 /** Whether this batch is currently firing and therefore is sealed. */
25 bool sealed = false; 25 bool sealed = false;
26 26
27 /** 27 /**
28 * Private constructor that shouldn't be used externally. Use [wrap] to ensure 28 * Private constructor that shouldn't be used externally. Use [wrap] to ensure
29 * that a batch exists when running a function. 29 * that a batch exists when running a function.
30 */ 30 */
31 EventBatch._internal() : summaries = new Map<int, EventSummary>(); 31 EventBatch._internal() : summaries = new Map<int, EventSummary>();
32 32
33 /** 33 /**
34 * Ensure there is an event batch where [userFunction] can accumuluate events. 34 * Ensure there is an event batch where [userFunction] can accumulate events.
35 * When the batch is complete, fire all events at once. 35 * When the batch is complete, fire all events at once.
36 */ 36 */
37 static Function wrap(userFunction(var a)) { 37 static Function wrap(userFunction(var a)) {
38 return (e) { 38 return (e) {
39 if (current == null) { 39 if (current == null) {
40 // Not in a batch so create one. 40 // Not in a batch so create one.
41 final batch = new EventBatch._internal(); 41 final batch = new EventBatch._internal();
42 current = batch; 42 current = batch;
43 var result = null; 43 var result = null;
44 try { 44 try {
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96 96
97 /** Fires all events at once. */ 97 /** Fires all events at once. */
98 void _notify() { 98 void _notify() {
99 assert(!sealed); 99 assert(!sealed);
100 sealed = true; 100 sealed = true;
101 for (final summary in summaries.values) { 101 for (final summary in summaries.values) {
102 summary.notify(); 102 summary.notify();
103 } 103 }
104 } 104 }
105 } 105 }
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