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Unified Diff: mojo/public/dart/third_party/barback/lib/src/asset/asset_node_set.dart

Issue 1346773002: Stop running pub get at gclient sync time and fix build bugs (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 3 months ago
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Index: mojo/public/dart/third_party/barback/lib/src/asset/asset_node_set.dart
diff --git a/mojo/public/dart/third_party/barback/lib/src/asset/asset_node_set.dart b/mojo/public/dart/third_party/barback/lib/src/asset/asset_node_set.dart
new file mode 100644
index 0000000000000000000000000000000000000000..a1fc17bebcc9952dd07c2e10173244f2b4dd4afb
--- /dev/null
+++ b/mojo/public/dart/third_party/barback/lib/src/asset/asset_node_set.dart
@@ -0,0 +1,42 @@
+// 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.asset_node_set;
+
+import 'package:collection/collection.dart';
+
+import 'asset_id.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].
+///
+/// Asset nodes may be accessed by their ids. This means that only one node with
+/// a given id may be stored in the set at a time.
+class AssetNodeSet extends DelegatingSet<AssetNode> {
+ // TODO(nweiz): Use DelegatingMapSet when issue 18705 is fixed.
+ /// A map from asset ids to assets in the set.
+ final _assetsById = new Map<AssetId, AssetNode>();
+
+ AssetNodeSet()
+ : super(new Set());
+
+ /// Returns the asset node in the set with [id], or `null` if none exists.
+ AssetNode operator [](AssetId id) => _assetsById[id];
+
+ bool add(AssetNode node) {
+ if (node.state.isRemoved) return false;
+ node.whenRemoved(() {
+ super.remove(node);
+ _assetsById.remove(node.id);
+ });
+ _assetsById[node.id] = node;
+ return super.add(node);
+ }
+
+ /// Returns whether an asset node with the given [id] is in the set.
+ bool containsId(AssetId id) => _assetsById.containsKey(id);
+
+ void addAll(Iterable<AssetNode> nodes) => nodes.forEach(add);
+}

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