Merge pull request #822 from abarth/focus_assert
Fix global key error while using fitness app
diff --git a/sky/packages/sky/lib/widgets/framework.dart b/sky/packages/sky/lib/widgets/framework.dart
index 1e4ead3..9c4908d 100644
--- a/sky/packages/sky/lib/widgets/framework.dart
+++ b/sky/packages/sky/lib/widgets/framework.dart
@@ -97,10 +97,7 @@
_syncedKeys.add(this);
}
- static bool _notifyingListeners = false;
-
static void registerSyncListener(GlobalKey key, GlobalKeySyncListener listener) {
- assert(!_notifyingListeners);
assert(key != null);
Set<GlobalKeySyncListener> listeners =
_syncListeners.putIfAbsent(key, () => new Set<GlobalKeySyncListener>());
@@ -109,7 +106,6 @@
}
static void unregisterSyncListener(GlobalKey key, GlobalKeySyncListener listener) {
- assert(!_notifyingListeners);
assert(key != null);
assert(_syncListeners.containsKey(key));
bool removed = _syncListeners[key].remove(listener);
@@ -119,7 +115,6 @@
}
static void registerRemoveListener(GlobalKey key, GlobalKeyRemoveListener listener) {
- assert(!_notifyingListeners);
assert(key != null);
Set<GlobalKeyRemoveListener> listeners =
_removeListeners.putIfAbsent(key, () => new Set<GlobalKeyRemoveListener>());
@@ -128,7 +123,6 @@
}
static void unregisterRemoveListener(GlobalKey key, GlobalKeyRemoveListener listener) {
- assert(!_notifyingListeners);
assert(key != null);
assert(_removeListeners.containsKey(key));
bool removed = _removeListeners[key].remove(listener);
@@ -148,31 +142,27 @@
assert(_debugDuplicates.isEmpty);
if (_syncedKeys.isEmpty && _removedKeys.isEmpty)
return;
- _notifyingListeners = true;
try {
- Map<GlobalKey, Set<GlobalKeyRemoveListener>> localRemoveListeners =
- new Map<GlobalKey, Set<GlobalKeyRemoveListener>>.from(_removeListeners);
- Map<GlobalKey, Set<GlobalKeySyncListener>> localSyncListeners =
- new Map<GlobalKey, Set<GlobalKeySyncListener>>.from(_syncListeners);
for (GlobalKey key in _syncedKeys) {
Widget widget = _registry[key];
- if (widget != null && localSyncListeners.containsKey(key)) {
- for (GlobalKeySyncListener listener in localSyncListeners[key])
+ if (widget != null && _syncListeners.containsKey(key)) {
+ Set<GlobalKeySyncListener> localListeners = new Set<GlobalKeySyncListener>.from(_syncListeners[key]);
+ for (GlobalKeySyncListener listener in localListeners)
listener(key, widget);
}
}
for (GlobalKey key in _removedKeys) {
- if (!_registry.containsKey(key) && localRemoveListeners.containsKey(key)) {
- for (GlobalKeyRemoveListener listener in localRemoveListeners[key])
+ if (!_registry.containsKey(key) && _removeListeners.containsKey(key)) {
+ Set<GlobalKeyRemoveListener> localListeners = new Set<GlobalKeyRemoveListener>.from(_removeListeners[key]);
+ for (GlobalKeyRemoveListener listener in localListeners)
listener(key);
}
}
} finally {
_removedKeys.clear();
_syncedKeys.clear();
- _notifyingListeners = false;
}
}
diff --git a/sky/unit/test/widget/global_key_test.dart b/sky/unit/test/widget/global_key_test.dart
index 18e1406..a410e05 100644
--- a/sky/unit/test/widget/global_key_test.dart
+++ b/sky/unit/test/widget/global_key_test.dart
@@ -106,4 +106,48 @@
GlobalKey.unregisterSyncListener(globalKey, syncListener);
GlobalKey.unregisterRemoveListener(globalKey, removeListener);
});
+
+ test('Global key mutate during iteration', () {
+ GlobalKey globalKey = new GlobalKey();
+
+ bool syncListenerCalled = false;
+ bool removeListenerCalled = false;
+
+ void syncListener(GlobalKey key, Widget widget) {
+ GlobalKey.unregisterSyncListener(globalKey, syncListener);
+ syncListenerCalled = true;
+ }
+
+ void removeListener(GlobalKey key) {
+ GlobalKey.unregisterRemoveListener(globalKey, removeListener);
+ removeListenerCalled = true;
+ }
+
+ GlobalKey.registerSyncListener(globalKey, syncListener);
+ GlobalKey.registerRemoveListener(globalKey, removeListener);
+ WidgetTester tester = new WidgetTester();
+
+ tester.pumpFrame(() {
+ return new Container(key: globalKey);
+ });
+ expect(syncListenerCalled, isTrue);
+ expect(removeListenerCalled, isFalse);
+
+ syncListenerCalled = false;
+ removeListenerCalled = false;
+ tester.pumpFrame(() {
+ return new Container();
+ });
+ expect(syncListenerCalled, isFalse);
+ expect(removeListenerCalled, isTrue);
+
+ syncListenerCalled = false;
+ removeListenerCalled = false;
+ tester.pumpFrame(() {
+ return new Container(key: globalKey);
+ });
+ expect(syncListenerCalled, isFalse);
+ expect(removeListenerCalled, isFalse);
+
+ });
}