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Unified Diff: pkg/observe/lib/src/dirty_check.dart

Issue 817483003: delete observe from the repo (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years ago
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Index: pkg/observe/lib/src/dirty_check.dart
diff --git a/pkg/observe/lib/src/dirty_check.dart b/pkg/observe/lib/src/dirty_check.dart
deleted file mode 100644
index 2084f227163a9d9642b0f5c8e584d21188879c51..0000000000000000000000000000000000000000
--- a/pkg/observe/lib/src/dirty_check.dart
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/// *Warning*: this library is **internal**, and APIs are subject to change.
-///
-/// Tracks observable objects for dirty checking and testing purposes.
-///
-/// It can collect all observed objects, which can be used to trigger
-/// predictable delivery of all pending changes in a test, including objects
-/// allocated internally to another library, such as those in
-/// `package:template_binding`.
-library observe.src.dirty_check;
-
-import 'dart:async';
-import 'package:logging/logging.dart';
-import 'package:observe/observe.dart' show Observable;
-
-/// The number of active observables in the system.
-int get allObservablesCount => _allObservablesCount;
-
-int _allObservablesCount = 0;
-
-List<Observable> _allObservables = null;
-
-bool _delivering = false;
-
-void registerObservable(Observable obj) {
- if (_allObservables == null) _allObservables = <Observable>[];
- _allObservables.add(obj);
- _allObservablesCount++;
-}
-
-/// Synchronously deliver all change records for known observables.
-///
-/// This will execute [Observable.deliverChanges] on objects that inherit from
-/// [Observable].
-// Note: this is called performMicrotaskCheckpoint in change_summary.js.
-void dirtyCheckObservables() {
- if (_delivering) return;
- if (_allObservables == null) return;
-
- _delivering = true;
-
- int cycles = 0;
- bool anyChanged = false;
- List debugLoop = null;
- do {
- cycles++;
- if (cycles == MAX_DIRTY_CHECK_CYCLES) {
- debugLoop = [];
- }
-
- var toCheck = _allObservables;
- _allObservables = <Observable>[];
- anyChanged = false;
-
- for (int i = 0; i < toCheck.length; i++) {
- final observer = toCheck[i];
- if (observer.hasObservers) {
- if (observer.deliverChanges()) {
- anyChanged = true;
- if (debugLoop != null) debugLoop.add([i, observer]);
- }
- _allObservables.add(observer);
- }
- }
- } while (cycles < MAX_DIRTY_CHECK_CYCLES && anyChanged);
-
- if (debugLoop != null && anyChanged) {
- _logger.warning('Possible loop in Observable.dirtyCheck, stopped '
- 'checking.');
- for (final info in debugLoop) {
- _logger.warning('In last iteration Observable changed at index '
- '${info[0]}, object: ${info[1]}.');
- }
- }
-
- _allObservablesCount = _allObservables.length;
- _delivering = false;
-}
-
-const MAX_DIRTY_CHECK_CYCLES = 1000;
-
-/// Log for messages produced at runtime by this library. Logging can be
-/// configured by accessing Logger.root from the logging library.
-final Logger _logger = new Logger('Observable.dirtyCheck');
-
-/// Creates a [ZoneSpecification] to set up automatic dirty checking after each
-/// batch of async operations. This ensures that change notifications are always
-/// delivered. Typically used via [dirtyCheckZone].
-ZoneSpecification dirtyCheckZoneSpec() {
- bool pending = false;
-
- enqueueDirtyCheck(ZoneDelegate parent, Zone zone) {
- // Only schedule one dirty check per microtask.
- if (pending) return;
-
- pending = true;
- parent.scheduleMicrotask(zone, () {
- pending = false;
- Observable.dirtyCheck();
- });
- }
-
- wrapCallback(Zone self, ZoneDelegate parent, Zone zone, f()) {
- // TODO(jmesserly): why does this happen?
- if (f == null) return f;
- return () {
- enqueueDirtyCheck(parent, zone);
- return f();
- };
- }
-
- wrapUnaryCallback(Zone self, ZoneDelegate parent, Zone zone, f(x)) {
- // TODO(jmesserly): why does this happen?
- if (f == null) return f;
- return (x) {
- enqueueDirtyCheck(parent, zone);
- return f(x);
- };
- }
-
- return new ZoneSpecification(
- registerCallback: wrapCallback,
- registerUnaryCallback: wrapUnaryCallback);
-}
-
-/// Forks a [Zone] off the current one that does dirty-checking automatically
-/// after each batch of async operations. Equivalent to:
-///
-/// Zone.current.fork(specification: dirtyCheckZoneSpec());
-Zone dirtyCheckZone() => Zone.current.fork(specification: dirtyCheckZoneSpec());
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