Allow Observatory to run as a hosted web service

runtime/bin/vmservice/client/lib/src/elements/vm_connect.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.
+
+library vm_connect_element;
+
+import 'dart:html';
+import 'package:polymer/polymer.dart';
+import 'observatory_element.dart';
+import 'package:observatory/app.dart';
+import 'package:observatory/service_html.dart';
+
+void _connectToVM(ObservatoryApplication app, NetworkVMTarget target) {
+  app.vm = new NetworkVM(target);
+}
+
+@CustomTag('vm-connect-target')
+class VMConnectTargetElement extends ObservatoryElement {
+  @published NetworkVMTarget target;
+
+  VMConnectTargetElement.created() : super.created();
+
+  bool get isChromeTarget {
+    if (target == null) {
+      return false;
+    }
+    return target.chrome;
+  }
+
+  bool get isCurrentTarget {
+    if (app.vm == null) {
+      return false;
+    }
+    return (app.vm as NetworkVM).target == target;
+  }
+
+  void connectToVm(MouseEvent event, var detail, Element node) {
+    if (event.button > 0 || event.metaKey || event.ctrlKey ||
+        event.shiftKey || event.altKey) {
+      // Not a left-click or a left-click with a modifier key:
+      // Let browser handle.
+      return;
+    }
+    event.preventDefault();
+    NetworkVM currentVM = app.vm;
+    if ((currentVM == null) || (currentVM.target != target)) {
+      _connectToVM(app, target);
+    }
+    var href = node.attributes['href'];
+    app.locationManager.go(href);
+  }
+
+  void deleteVm(MouseEvent event, var detail, Element node) {
+    app.targets.remove(target);
+  }
+}
+
+@CustomTag('vm-connect')
+class VMConnectElement extends ObservatoryElement {
+  @published String standaloneVmAddress = '';
+  @published String chromiumAddress = 'localhost:9222';
+  @observable ObservableList<NetworkVMTarget> chromeTargets =
+      new ObservableList<NetworkVMTarget>();
+
+  VMConnectElement.created() : super.created() {
+    pollPeriod = new Duration(seconds: 1);
+  }
+
+  void _connect(NetworkVMTarget target) {
+    _connectToVM(app, target);
+    app.locationManager.go('#/vm');
+  }
+
+  void onPoll() {
+    _refreshTabs();
+  }
+
+  String _normalizeStandaloneAddress(String networkAddress) {
+    if (networkAddress.startsWith('ws://')) {
+      return networkAddress;
+    }
+    return 'ws://${networkAddress}/ws';
+  }
+
+  void connectStandalone(Event e, var detail, Node target) {
+    // Prevent any form action.
+    e.preventDefault();
+    var targetAddress = _normalizeStandaloneAddress(standaloneVmAddress);
+    var target = app.targets.findOrMake(targetAddress);
+    _connect(target);
+  }
+
+  void getTabs(Event e, var detail, Node target) {
+    // Prevent any form action.
+    e.preventDefault();
+    _refreshTabs();
+  }
+
+  void _refreshTabs() {
+    ChromiumTargetLister.fetch(chromiumAddress).then((targets) {
+      chromeTargets.clear();
+      if (targets == null) {
+        return;
+      }
+      for (var i = 0; i < targets.length; i++) {
+        if (targets[i].networkAddress == null) {
+          // Don't add targets that don't have a network address.
+          // This happens when a tab has devtools open!
+          continue;
+        }
+        chromeTargets.add(targets[i]);
+      }
+    }).catchError((e) {
+      chromeTargets.clear();
+    });
+  }
+}