Make service-view programmatically switch views

runtime/bin/vmservice/client/lib/src/elements/service_view.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_object_view_element;
 
+import 'dart:html';
 import 'package:logging/logging.dart';
 import 'package:observatory/service.dart';
+import 'package:observatory/elements.dart';
 import 'package:polymer/polymer.dart';
 import 'observatory_element.dart';
 
 @CustomTag('service-view')
 class ServiceObjectViewElement extends ObservatoryElement {
   @published ServiceObject object;
 
   ServiceObjectViewElement.created() : super.created();
 

[turnidge, 2014/03/12 17:46:29]

Maybe a comment saying why we build the element afresh each time instead of
relying on template if.

+  ObservatoryElement _constructElementForObject() {
+    var type = object.serviceType;
+    switch (type) {
+      case 'AllocationProfile':
+        HeapProfileElement element = new Element.tag('heap-profile');
+        element.profile = object;
+        return element;
+        break;
+      case 'Array':
+        InstanceViewElement element = new Element.tag('instance-view');
+        element.instance = object;
+        return element;
+        break;
+      case 'Bool':
+        InstanceViewElement element = new Element.tag('instance-view');

[turnidge, 2014/03/12 17:46:29]

Combine labels with identical outcomes.

case 'Array':
case 'Bool':
...
case 'String':
   blah

+        element.instance = object;
+        return element;
+        break;
+      case 'BreakpointList':
+        BreakpointListElement element = new Element.tag('breakpoint-list');
+        element.msg = object;
+        return element;
+        break;
+      case 'Class':
+        ClassViewElement element = new Element.tag('class-view');
+        element.cls = object;
+        return element;
+        break;
+      case 'Closure':
+        InstanceViewElement element = new Element.tag('instance-view');
+        element.instance = object;
+        return element;
+        break;
+      case 'Code':
+        CodeViewElement element = new Element.tag('code-view');
+        element.code = object;
+        return element;
+        break;
+      case 'Error':
+        ErrorViewElement element = new Element.tag('error-view');
+        element.error = object;
+        return element;
+        break;
+      case 'Field':
+        FieldViewElement element = new Element.tag('field-view');
+        element.field = object;
+        return element;
+        break;
+      case 'Function':
+        FunctionViewElement element = new Element.tag('function-view');
+        element.function = object;
+        return element;
+        break;
+      case 'GrowableObjectArray':
+        InstanceViewElement element = new Element.tag('instance-view');
+        element.instance = object;
+        return element;
+        break;
+      case 'Instance':
+        InstanceViewElement element = new Element.tag('instance-view');
+        element.instance = object;
+        return element;
+        break;
+      case 'IsolateList':
+        IsolateListElement element = new Element.tag('isolate-list');
+        element.isolates = object;
+        return element;
+        break;
+      case 'Library':
+        LibraryViewElement element = new Element.tag('library-view');
+        element.library = object;
+        return element;
+        break;
+      case 'Profile':
+        IsolateProfileElement element = new Element.tag('isolate-profile');
+        element.profile = object;
+        return element;
+        break;
+      case 'Script':
+        ScriptViewElement element = new Element.tag('script-view');
+        element.script = object;
+        return element;
+        break;
+      case 'Smi':
+        InstanceViewElement element = new Element.tag('instance-view');
+        element.instance = object;
+        return element;
+        break;
+      case 'StackTrace':
+        StackTraceElement element = new Element.tag('stack-trace');
+        element.trace = object;
+        return element;
+        break;
+      case 'String':
+        InstanceViewElement element = new Element.tag('instance-view');
+        element.instance = object;
+        return element;
+        break;
+      default:
+        return null;
+    }
+  }
+
   objectChanged(oldValue) {
+    // Remove the current view.
+    children.clear();
     if (object == null) {
-      Logger.root.info('Message set to null.');
+      Logger.root.info('Viewing null object.');
       return;
     }
-    Logger.root.info('Viewing object of type \'${object.serviceType}\'');
+    var type = object.serviceType;
+    var element = _constructElementForObject();
+    if (element == null) {
+      Logger.root.info('Unable to find a view element for \'${type}\'');
+      return;
+    }
+    children.add(element);
+    Logger.root.info('Viewing object of \'${type}\'');
   }
 }