Rework <script-ref>: - optional 'line' parameter - use a shorter version of the script url in the a…

runtime/bin/vmservice/client/lib/src/observatory_elements/service_ref.dart

 // Copyright (c) 2013, 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 service_ref_element;
 
 import 'package:polymer/polymer.dart';
 import 'observatory_element.dart';
 
 @CustomTag('service-ref')
 class ServiceRefElement extends ObservatoryElement {
   @published Map ref;
   @published bool internal = false;
+  @published Isolate isolate = null;
   ServiceRefElement.created() : super.created();
 
   void refChanged(oldValue) {
     notifyPropertyChange(#url, "", url);
     notifyPropertyChange(#name, [], name);
     notifyPropertyChange(#hoverText, "", hoverText);
   }
 
   String get url {
-    if ((app != null) && (ref != null)) {
-      return app.locationManager.currentIsolateRelativeLink(ref['id']);
+    if (ref != null) {
+      return relativeLink(ref['id']);
     }
     return '';
   }
 
   String get hoverText {
     if (ref == null) {
       return '';
     }
     // Return the VM name by default.
     var name = ref['name'];
     return name != null ? name : '';
   }
 
   String get name {
     if (ref == null) {
       return '';
     }
     String name_key = internal ? 'name' : 'user_name';
     if (ref[name_key] != null) {
       return ref[name_key];
     } else if (ref['name'] != null) {
       return ref['name'];
     }
     return '';
   }
+
+  void isolateChanged(oldValue) {
+    notifyPropertyChange(#relativeLink, 0, 1);
+  }
+
+  @observable
+  String relativeLink(String link) {
+    if (app == null) {
+      return '';
+    } else if (isolate == null) {
+      return app.locationManager.currentIsolateRelativeLink(link);
+    } else {
+      return app.locationManager.relativeLink(isolate.id, link);
+    }
+  }
 }