Converted Observatory vm-connect element

runtime/observatory/lib/src/app/target_manager.dart

-// Copyright (c) 2014, 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 app;
-
-class ChromiumTargetLister {
-  /// Fetch the list of chromium [NetworkVMTargets].
-  static Future<List<WebSocketVMTarget>> fetch(String networkAddress) {
-    if (networkAddress == null) {
-      return new Future.error(null);
-    }
-    var encoded = Uri.encodeComponent(networkAddress);
-    var url = '/crdptargets/$encoded';
-    return HttpRequest.getString(url).then((String responseText) {
-      var list = JSON.decode(responseText);
-      if (list == null) {
-        return list;
-      }
-      for (var i = 0; i < list.length; i++) {
-        list[i] = new WebSocketVMTarget.fromMap(list[i]);
-      }
-      return list;
-    }).catchError((e) {
-      // An error occured while getting the list of Chrome targets.
-      // We eagerly request the list of targets, meaning this error can occur
-      // regularly. By catching it and dropping it, we avoid spamming errors
-      // on the console.
-    });
-  }
-}
-
-class TargetManager extends Observable {
-  static const _historyKey = 'history';
-  final SettingsGroup _settings = new SettingsGroup('targetManager');
-  final List history = new ObservableList();
-  WebSocketVMTarget defaultTarget;
-
-  String _networkAddressOfDefaultTarget() {
-    if (Utils.runningInJavaScript()) {
-      // We are running as JavaScript, use the same host that Observatory has
-      // been loaded from.
-      return 'ws://${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';
-    }
-  }
-  TargetManager() {
-    _restore();
-    // Add a default standalone VM target.
-    defaultTarget = findOrMake(_networkAddressOfDefaultTarget());
-    assert(defaultTarget != null);
-    add(defaultTarget);
-  }
-
-  void clearHistory() {
-    history.clear();
-    _store();
-  }
-
-  WebSocketVMTarget findOrMake(String networkAddress) {
-    var target;
-    target = _find(networkAddress);
-    if (target != null) {
-      return target;
-    }
-    target = new WebSocketVMTarget(networkAddress);
-    return target;
-  }
-
-  /// Find by networkAddress.
-  WebSocketVMTarget _find(String networkAddress) {
-    var r;
-    history.forEach((item) {
-      if ((item.networkAddress == networkAddress) && (item.chrome == false)) {
-        r = item;
-      }
-    });
-    return r;
-  }
-
-  void add(WebSocketVMTarget item) {
-    if (item.chrome) {
-      // We don't store chrome tabs.
-      return;
-    }
-    if (history.contains(item)) {
-      return;
-    }
-    // Not inserting duplicates.
-    assert(_find(item.networkAddress) == null);
-    history.add(item);
-    _sort();
-    _store();
-  }
-
-  void remove(WebSocketVMTarget target) {
-    history.remove(target);
-    _sort();
-    _store();
-  }
-
-  void _sort() {
-    this.history.sort((WebSocketVMTarget a, WebSocketVMTarget b) {
-      return b.lastConnectionTime.compareTo(a.lastConnectionTime);
-    });
-  }
-
-  /// After making a change, update settings.
-  void _store() {
-    _sort();
-    _settings.set(_historyKey,  history);
-  }
-
-  /// Read settings from data store.
-  void _restore() {
-    this.history.clear();
-    var loaded = _settings.get(_historyKey);
-    if (loaded == null) {
-      return;
-    }
-    for (var i = 0; i < loaded.length; i++) {
-      loaded[i] = new WebSocketVMTarget.fromMap(loaded[i]);
-    }
-    this.history.addAll(loaded);
-    _sort();
-  }
-}