Incoming references service request and UI.

runtime/bin/vmservice/observatory/lib/src/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 'dart:html';
+import 'package:logging/logging.dart';
 import 'package:polymer/polymer.dart';
 import 'observatory_element.dart';
 import 'package:observatory/service.dart';
 
 @CustomTag('service-ref')
 class ServiceRefElement extends ObservatoryElement {
   @published ServiceObject ref;
   @published bool internal = false;
   ServiceRefElement.created() : super.created();
 
@@ skipping 30 matching lines @@
       return 'NULL REF';
     }
     return ref.name;
   }
 
   // Workaround isEmpty not being useable due to missing @MirrorsUsed.
   bool get nameIsEmpty {
     return name.isEmpty;
   }
 }
+
+
+@CustomTag('service-ref-downcast')

[Cutch, 2014/08/21 20:08:55]

Rename service-ref to be service-ref-common or service-ref-base and rename this
to be service-ref.

+class ServiceRefDowncastElement extends ObservatoryElement {
+  @published ServiceObject ref;
+  ServiceRefDowncastElement.created() : super.created();
+
+  ObservatoryElement _constructElementForRef() {
+    var type = ref.serviceType;
+    switch (type) {
+      case 'Class':
+        ClassRefElement element = new Element.tag('class-ref');
+        element.ref = ref;
+        return element;
+      case 'Code':
+        CodeRefElement element = new Element.tag('code-ref');
+        element.ref = ref;
+        return element;
+      case 'Field':
+        FieldRefElement element = new Element.tag('field-ref');
+        element.ref = ref;
+        return element;
+      case 'Function':
+        FunctionRefElement element = new Element.tag('function-ref');
+        element.ref = ref;
+        return element;
+      case 'Library':
+        LibraryRefElement element = new Element.tag('library-ref');
+        element.ref = ref;
+        return element;
+      case 'Type':
+      case 'Array':
+      case 'Bool':
+      case 'Closure':
+      case 'Double':
+      case 'GrowableObjectArray':
+      case 'Instance':
+      case 'Smi':
+      case 'Mint':
+      case 'Bigint':
+      case 'String':
+        InstanceRefElement element = new Element.tag('instance-ref');
+        element.ref = ref;
+        return element;
+      default:
+        Element element = new Element.tag('span');
+        element.text = "<<Unknown service ref: $ref>>";
+        return element;
+    }
+  }
+  
+  refChanged(oldValue) {
+    // Remove the current view.
+    children.clear();
+    if (ref == null) {
+      Logger.root.info('Viewing null object.');
+      return;
+    }
+    var type = ref.serviceType;
+    var element = _constructElementForRef();
+    if (element == null) {
+      Logger.root.info('Unable to find a ref element for \'${type}\'');
+      return;
+    }
+    children.add(element);
+    Logger.root.info('Viewing object of \'${type}\'');
+  }
+}