Converted Observatory vm-connect element

runtime/observatory/lib/src/repositories/target.dart

+// Copyright (c) 2016, 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
+
+part of repositories;
+
+class TargetChangeEvent implements M.TargetChangeEvent {
+  final TargetRepository repository;
+  TargetChangeEvent(this.repository);
+}
+
+class TargetRepository implements M.TargetRepository {
+
+  static const _historyKey = 'history';
+
+  final StreamController<TargetChangeEvent> _onChange;
+  final Stream<TargetChangeEvent> onChange;
+  final SettingsRepository _settings = new SettingsRepository('targetManager');
+
+  final List<SC.WebSocketVMTarget> _list = <SC.WebSocketVMTarget>[];
+  SC.WebSocketVMTarget current;
+
+  factory TargetRepository() {
+    var controller = new StreamController<TargetChangeEvent>();
+    var stream = controller.stream.asBroadcastStream();
+    return new TargetRepository._(controller, stream);
+  }
+
+  TargetRepository._(this._onChange, this.onChange) {
+    _restore();
+    if (_list.isEmpty) {
+      _list.add(new SC.WebSocketVMTarget(_networkAddressOfDefaultTarget()));
+    }
+    current = _list.first;
+  }
+
+  void add(String address) {
+    if (_find(address) != null) return;
+    _list.insert(0, new SC.WebSocketVMTarget(address));
+    _onChange.add(new TargetChangeEvent(this));
+    _store();
+  }
+
+  Iterable<SC.WebSocketVMTarget> list() => _list;
+
+  void setCurrent(M.Target t) {
+    SC.WebSocketVMTarget target = t as SC.WebSocketVMTarget;
+    if (!_list.contains(target)) return;
+    current = target;
+    _onChange.add(new TargetChangeEvent(this));
+  }
+
+  void delete(o) {
+    if (_list.remove(o)) {
+      if (o == current) {
+        current = null;
+      }
+      _onChange.add(new TargetChangeEvent(this));
+      _store();
+    }
+  }
+
+  /// Read settings from data store.
+  void _restore() {
+    _list.clear();
+    var loaded = _settings.get(_historyKey);
+    if (loaded == null) {
+      return;
+    }
+    _list.addAll(loaded.map((i) => new SC.WebSocketVMTarget.fromMap(i)));
+    _list.sort((SC.WebSocketVMTarget a, SC.WebSocketVMTarget b) {
+       return b.lastConnectionTime.compareTo(a.lastConnectionTime);
+    });
+  }
+
+  /// After making a change, update settings.
+  void _store() {
+    _settings.set(_historyKey,  _list);
+  }
+
+  /// Find by networkAddress.
+  SC.WebSocketVMTarget _find(String networkAddress) {
+    for (SC.WebSocketVMTarget item in _list) {
+      if (item.networkAddress == networkAddress) {
+        return item;
+      }
+    }
+    return null;
+  }
+
+  static String _networkAddressOfDefaultTarget() {
+    if (Utils.runningInJavaScript()) {
+      // We are running as JavaScript, use the same host that Observatory has
+      // been loaded from.
+      return 'ws://${window.location.host}/ws';
+    } else {
+      // Otherwise, assume we are running from Dart Editor and want to connect
+      // to the default host.
+      return 'ws://localhost:8181/ws';
+    }
+  }
+}