Changes to support dprof and Observatory profiler UIs

runtime/bin/vmservice/client/lib/src/observatory/location_manager.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.
 
 part of observatory;
 
 /// The LocationManager class observes and parses the hash ('#') portion of the
 /// URL in window.location. The text after the '#' is used as the request
 /// string for the VM service.
 class LocationManager extends Observable {
   static const int InvalidIsolateId = 0;
   static const String defaultHash = '#/isolates/';
   static final RegExp currentIsolateMatcher = new RegExp(r"#/isolates/\d+");
+  static final RegExp currentIsolateProfileMatcher =
+      new RegExp(r'#/isolates/\d+/profile');
 
   ObservatoryApplication _application;
   ObservatoryApplication get application => _application;
 
+  @observable bool profile = false;
   @observable String currentHash = '';
   @observable Uri currentHashUri;
   void init() {
     window.onHashChange.listen((event) {
       if (setDefaultHash()) {
         // We just triggered another onHashChange event.
         return;
       }
       // Request the current anchor.
       requestCurrentHash();
@@ skipping 42 matching lines @@
     return false;
   }
 
   /// Take the current request string from window.location and submit the
   /// request to the request manager.
   void requestCurrentHash() {
     currentHash = window.location.hash;
     // Chomp off the #
     String requestUrl = currentHash.substring(1);
     currentHashUri = Uri.parse(requestUrl);
-    application.requestManager.get(requestUrl);
+    if (currentIsolateProfileMatcher.hasMatch(currentHash)) {
+      // We do not automatically fetch profile data.
+      profile = true;
+    } else {
+      application.requestManager.get(requestUrl);
+    }
   }
 
   /// Create a request for [l] on the current isolate.
   @observable
   String currentIsolateRelativeLink(String l) {
     var isolateId = currentIsolateId();
     if (isolateId == LocationManager.InvalidIsolateId) {
       return defaultHash;
     }
     return relativeLink(isolateId, l);
   }
 
   /// Create a request for [scriptURL] on the current isolate.
   @observable
   String currentIsolateScriptLink(String scriptURL) {
     var encoded = Uri.encodeComponent(scriptURL);
     return currentIsolateRelativeLink('scripts/$encoded');
   }
 
   /// Create a request for [l] on [isolateId].
   @observable
   String relativeLink(String isolateId, String l) {
     return '#/$isolateId/$l';
   }
 }