| // 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. |
| |
| library barback.asset_node_set; |
| |
| import 'package:collection/collection.dart'; |
| |
| import 'asset_node.dart'; |
| |
| /// A set of [AssetNode]s that automatically ensures that nodes are removed from |
| /// the set as soon as they're marked as [AssetState.REMOVED]. |
| class AssetNodeSet extends DelegatingSet<AssetNode> { |
| AssetNodeSet() |
| : super(new Set()); |
| |
| bool add(AssetNode node) { |
| if (node.state.isRemoved) return false; |
| node.whenRemoved(() => super.remove(node)); |
| return super.add(node); |
| } |
| |
| void addAll(Iterable<AssetNode> nodes) => nodes.forEach(add); |
| } |