Implement automatic loading of dart:core_native_fields library

bin/eventhandler.dart

 // Copyright (c) 2011, 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.
 
+// Create an empty class to represent the native fields used in
+// the EventHandler class (it needs one native field).
+class EventHandlerNativeWrapper extends NativeFieldWrapperClass1 {

[Anton Muhin, 2011/11/13 16:19:32]

do you need this helper class, maybe simply class EventHandler extends
NativeFieldWrapperClass1 ?

[siva, 2011/11/15 02:16:52]

I added it specifically to address the concern you had about names not being
readable when actually extending the class. This would serve as an example of
creating empty classes with more readable names and then using them in the dart
code.

On 2011/11/13 16:19:32, antonmuhin wrote:

[Anton Muhin, 2011/11/15 12:22:23]

Up to you, it's a minor thing.  My concern was for somewhat different situation:
we have a DOMWrapperBase which used in zillion of classes, so it's natural to
'rename' NativeFieldWrapper thing.  In this case, benefit might be minor.

Again, cosmetic, up to your judgement.

On 2011/11/15 02:16:52, asiva wrote:

[siva, 2011/11/15 19:42:49]

I will leave it as such with a comment stating that the empty class is there
just to make the derived class definition more readable.

On 2011/11/15 12:22:23, antonmuhin wrote:

+}
+
 class EventHandler extends EventHandlerNativeWrapper {
   EventHandler() { }
 
   static void _start() {
     if (_eventHandler === null) {
       _eventHandler = new EventHandler();
       _eventHandler._doStart();
     }
   }
 
   void _doStart() native "EventHandler_Start";
 
   static _sendData(int id, ReceivePort receivePort, int data) {
     if (_eventHandler !== null) {
       _eventHandler._doSendData(id, receivePort, data);
     }
   }
 
 
   void _doSendData(int id, ReceivePort receivePort, int data)
       native "EventHandler_SendData";
 
   static EventHandler _eventHandler;
 }