Allow Observatory to run as a hosted web service

runtime/bin/vmservice/client/lib/src/app/pane.dart

Index: runtime/bin/vmservice/client/lib/src/app/pane.dart
diff --git a/runtime/bin/vmservice/client/lib/src/app/application.dart b/runtime/bin/vmservice/client/lib/src/app/pane.dart
similarity index 53%
copy from runtime/bin/vmservice/client/lib/src/app/application.dart
copy to runtime/bin/vmservice/client/lib/src/app/pane.dart
index 183d6b18a77eeb3d0d240d1a3765691699ba8282..e99906417672657c97e5ab6957f43b543453f98c 100644
--- a/runtime/bin/vmservice/client/lib/src/app/application.dart
+++ b/runtime/bin/vmservice/client/lib/src/app/pane.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
@@ -55,6 +55,8 @@ class ServiceObjectPane extends Pane {
     app.vm.get(url).then((obj) {
       ServiceObjectViewElement pane = element;
       pane.object = obj;
+    }).catchError((e) {
+      Logger.root.severe('ServiceObjectPane visit error: $e');
     });
   }
 
@@ -87,6 +89,8 @@ class ClassTreePane extends Pane {
         ClassTreeElement pane = element;
         pane.isolate = i;
       }
+    }).catchError((e) {
+      Logger.root.severe('ClassTreePane visit error: $e');
     });
   }
 
@@ -113,95 +117,20 @@ class ErrorViewPane extends Pane {
   bool canVisit(String url) => url.startsWith('error/');
 }
 
-/// The observatory application. Instances of this are created and owned
-/// by the observatory_application custom element.
-class ObservatoryApplication extends Observable {
-  final _paneRegistry = new List<Pane>();
-  ServiceObjectPane _serviceObjectPane;
-  Pane _currentPane;
-  @observable final LocationManager locationManager;
-  @observable final VM vm;
-  @observable Isolate isolate;
-  @reflectable final ObservatoryApplicationElement rootElement;
-
-  @reflectable ServiceObject lastErrorOrException;
-
-  void _initOnce() {
-    _registerPanes();
-    vm.errors.stream.listen(_onError);
-    vm.exceptions.stream.listen(_onException);
-    location = locationManager;
-    locationManager._init(this);
-  }
-
-  void _registerPanes() {
-    if (_serviceObjectPane != null) {
-      // Already done.
-      return;
-    }
-    // Register ClassTreePane.
-    _paneRegistry.add(new ClassTreePane(this));
-    _paneRegistry.add(new ErrorViewPane(this));
-    // Note that ServiceObjectPane must be the last entry in the list as it is
-    // the catch all.
-    _serviceObjectPane = new ServiceObjectPane(this);
-    _paneRegistry.add(_serviceObjectPane);
-  }
-
-  void _onError(ServiceError error) {
-    lastErrorOrException = error;
-    _visit('error/', null);
-  }
-
-  void _onException(ServiceException exception) {
-    lastErrorOrException = exception;
-    _visit('error/', null);
-  }
+class VMConnectPane extends Pane {
+  VMConnectPane(app) : super(app);
 
-  void _visit(String url, String args) {
-    // TODO(johnmccutchan): Pass [args] to pane.
-    for (var i = 0; i < _paneRegistry.length; i++) {
-      var pane = _paneRegistry[i];
-      if (pane.canVisit(url)) {
-        _installPane(pane);
-        pane.visit(url);
-        return;
-      }
-    }
-    throw new FallThroughError();
-  }
-
-  /// Set the Observatory application pane.
-  void _installPane(Pane pane) {
-    assert(pane != null);
-    print('Installing $pane');
-    if (_currentPane == pane) {
-      // Already isntalled.
-      return;
-    }
-    if (_currentPane != null) {
-      _currentPane.onUninstall();
+  void onInstall() {
+    if (element == null) {
+      element = new Element.tag('vm-connect');
     }
-    pane.onInstall();
-    // Clear children.
-    rootElement.children.clear();
-    // Add new pane.
-    rootElement.children.add(pane.element);
-    // Remember pane.
-    _currentPane = pane;
+    assert(element != null);
   }
 
-  ObservatoryApplication.devtools(this.rootElement) :
-      locationManager = new HashLocationManager(),
-      vm = new DartiumVM() {
-    _initOnce();
+  void visit(String url) {
+    assert(element != null);
+    assert(canVisit(url));
   }
 
-  ObservatoryApplication(this.rootElement) :
-      locationManager = new HashLocationManager(),
-      vm = new HttpVM() {
-    _initOnce();
-  }
+  bool canVisit(String url) => url.startsWith('vm-connect/');
 }
-
-LocationManager location;