CPU profile displayed in three tables with a tree

runtime/observatory/lib/src/app/page.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 [Page] controls the user interface of Observatory. At any given time
 /// one page will be the current page. Pages are registered at startup.
 /// When the user navigates within the application, each page is asked if it
 /// can handle the current location, the first page to say yes, wins.
 abstract class Page extends Observable {
   final ObservatoryApplication app;
-
+  final ObservableMap<String, String> internalArguments =
+      new ObservableMap<String, String>();
   @observable ObservatoryElement element;
-  @observable ObservableMap args;
 
   Page(this.app);
 
   /// Called when the page is installed, this callback must initialize
   /// [element].
   void onInstall();
 
   /// Called when the page is uninstalled, this callback must clear
   /// [element].
   void onUninstall() {
     element = null;
   }
 
   /// Called when the page should update its state based on [uri].
-  /// NOTE: Only called when the page is installed.
-  void visit(Uri uri, Map argsMap) {
-    args = toObservable(argsMap);
+  void visit(Uri uri, Map internalArguments) {
+    this.internalArguments.clear();
+    this.internalArguments.addAll(internalArguments);
     _visit(uri);
   }
 
   // Overridden by subclasses.
   void _visit(Uri uri);
 
   /// Called to test whether this page can visit [uri].
   bool canVisit(Uri uri);
 }
 
@@ skipping 154 matching lines @@
     getIsolate(uri).then((isolate) {
       if (element != null) {
         /// Update the page.
         CpuProfileElement page = element;
         page.isolate = isolate;
       }
     });
   }
 }
 
+class TableCpuProfilerPage extends SimplePage {
+  TableCpuProfilerPage(app)
+      : super('profiler-table', 'cpu-profile-table', app);
+
+  void _visit(Uri uri) {
+    super._visit(uri);
+    getIsolate(uri).then((isolate) {
+      if (element != null) {
+        /// Update the page.
+        CpuProfileTableElement page = element;
+        page.isolate = isolate;
+        // TODO(johnmccutchan): Provide a more general mechanism to notify
+        // elements of URI parameter changes. Possibly via a stream off of
+        // LocationManager. With a stream individual elements (not just pages)
+        // could be notified.
+        page.checkParameters();
+      }
+    });
+  }
+}
+
 class AllocationProfilerPage extends SimplePage {
   AllocationProfilerPage(app)
       : super('allocation-profiler', 'heap-profile', app);
 
   void _visit(Uri uri) {
     super._visit(uri);
     getIsolate(uri).then((isolate) {
       if (element != null) {
         /// Update the page.
         HeapProfileElement page = element;
@@ skipping 108 matching lines @@
   void _visit(Uri uri) {
     assert(element != null);
     assert(canVisit(uri));
     app.vm.getIsolate(uri.queryParameters['isolateId']).then((i) {
       (element as MetricsPageElement).isolate = i;
     });
   }
 
   bool canVisit(Uri uri) => uri.path == 'metrics';
 }