Improve script display in the observatory.

runtime/bin/vmservice/client/lib/src/app/pane.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;
 
 /// A [Pane] controls the user interface of Observatory. At any given time
 /// one pane will be the current pane. Panes are registered at startup.
 /// When the user navigates within the application, each pane is asked if it
 /// can handle the current location, the first pane to say yes, wins.
 abstract class Pane extends Observable {
   final ObservatoryApplication app;
 
   @observable ObservatoryElement element;
 
   Pane(this.app);
 
   /// Called when the pane is installed, this callback must initialize
   /// [element].
   void onInstall();
 
   /// Called when the pane is uninstalled, this callback must clear
   /// [element].
   void onUninstall() {
     element = null;
   }
 
   /// Called when the pane should update its state based on [url].
   /// NOTE: Only called when the pane is installed.
-  void visit(String url);
+  void visit(String url, Map args);
 
   /// Called to test whether this pane can visit [url].
   bool canVisit(String url);
 }
 
 /// A general service object viewer.
 class ServiceObjectPane extends Pane {
   ServiceObjectPane(app) : super(app);
 
   void onInstall() {
     if (element == null) {
       /// Lazily create pane.
       element = new Element.tag('service-view');
     }
   }
 
-  void visit(String url) {
+  void visit(String url, Map args) {
     assert(element != null);
     assert(canVisit(url));
     if (url == '') {
       // Nothing requested.
       return;
     }
     /// Request url from VM and display it.
     app.vm.get(url).then((obj) {
       ServiceObjectViewElement pane = element;
       pane.object = obj;
+      pane.args = toObservable(args);
     }).catchError((e) {
       Logger.root.severe('ServiceObjectPane visit error: $e');
     });
   }
 
   /// Catch all.
   bool canVisit(String url) => true;
 }
 
 /// Class tree pane.
 class ClassTreePane extends Pane {
   static const _urlPrefix = 'class-tree/';
 
   ClassTreePane(app) : super(app);
 
   void onInstall() {
     if (element == null) {
       element = new Element.tag('class-tree');
     }
   }
 
-  void visit(String url) {
+  void visit(String url, Map args) {
     assert(element != null);
     assert(canVisit(url));
     // ClassTree urls are 'class-tree/isolate-id', chop off prefix, leaving
     // isolate url.
     url = url.substring(_urlPrefix.length);
     /// Request the isolate url.
     app.vm.get(url).then((i) {
       if (element != null) {
         /// Update the pane.
         ClassTreeElement pane = element;
@@ skipping 11 matching lines @@
 class ErrorViewPane extends Pane {
   ErrorViewPane(app) : super(app);
 
   void onInstall() {
     if (element == null) {
       /// Lazily create pane.
       element = new Element.tag('service-view');
     }
   }
 
-  void visit(String url) {
+  void visit(String url, Map args) {
     assert(element != null);
     assert(canVisit(url));
     (element as ServiceObjectViewElement).object = app.lastErrorOrException;
   }
 
   bool canVisit(String url) => url.startsWith('error/');
 }
 
 class VMConnectPane extends Pane {
   VMConnectPane(app) : super(app);
 
   void onInstall() {
     if (element == null) {
       element = new Element.tag('vm-connect');
     }
     assert(element != null);
   }
 
-  void visit(String url) {
+  void visit(String url, Map args) {
     assert(element != null);
     assert(canVisit(url));
   }
 
   bool canVisit(String url) => url.startsWith('vm-connect/');
 }