Allow all events to be accessed via on[foo] instead of just onFoo

tools/dom/templates/html/impl/impl_EventTarget.darttemplate

 // Copyright (c) 2012, 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 $LIBRARYNAME;
 
 /**
  * Base class that supports listening for and dispatching browser events.
  *
  * Normally events are accessed via the Stream getter:
@@ skipping 36 matching lines @@
   Events(this._ptr);
 
   Stream operator [](String type) {
     return new _EventStream(_ptr, type, false);
   }
 }
 
 class ElementEvents extends Events {
   /* Raw event target. */
   final Element _ptr;
+  static final webkitEvents = {
+    'fullscreenchange' : 'onwebkitfullscreenchange', 

[blois, 2013/10/19 01:19:10]

the on prefix should not be there.

[Emily Fortuna, 2013/10/21 17:43:51]

Done.

+    'fullscreenerror' : 'onwebkitfullscreenerror',
+    'pointerlockchange' : 'onwebkitpointerlockchange', 
+    'pointerlockerror' : 'onwebkitpointerlockerror', 
+    'keyadded' : 'onwebkitkeyadded', 

[blois, 2013/10/19 01:19:10]

Can we only add the webkit prefix on webkit browsers? Otherwise people could be
passing in valid event names then we screw it up.

[Emily Fortuna, 2013/10/21 17:43:51]

Done.

+    'keyerror' : 'onwebkitkeyerror', 
+    'keymessage' : 'onwebkitkeymessage', 
+    'needkey' : 'onwebkitneedkey', 
+    'resourcetimingbufferfull' : 'onwebkitresourcetimingbufferfull', 

[blois, 2013/10/19 01:19:10]

Looking at this list, there are more renames-
https://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/pkg/...

[Emily Fortuna, 2013/10/21 17:43:51]

I think those other events much have gone away. I can't find DOMFocusIn/Out in
html at all.

+    'animationend' : 'onwebkitAnimationEnd', 
+    'animationiteration' : 'onwebkitAnimationIteration', 
+    'animationstart' : 'onwebkitAnimationStart', 

[Emily Fortuna, 2013/10/19 00:57:31]

it seemed unrealistic to expect the user to know that "AnimationStart' starts
with a capital letter, but 'needkey' does not, so I made these case insensitive.
If you disagree, then we can just append "onwebkit" to the string and expect the
user to type it correctly.

+    'speechchange' : 'onwebkitSpeechChange'
+  };
 
   ElementEvents(Element ptr) : this._ptr = ptr, super(ptr);
 
   Stream operator [](String type) {
+    if (type.toLowerCase() in webkitEvents.keys) {
+      return new _ElementEventStreamImpl(
+          _ptr, webkitEvents[type.toLowerCase()], false);
+    }
     return new _ElementEventStreamImpl(_ptr, type, false);
   }
 }
 
 /**
  * Base class for all browser objects that support events.
  *
  * Use the [on] property to add, and remove events (rather than
  * [$dom_addEventListener] and [$dom_removeEventListener]
  * for compile-time type checks and a more concise API.
  */
 $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 
   // Custom element created callback.
   EventTarget._created();
 
   /**
    * This is an ease-of-use accessor for event streams which should only be
    * used when an explicit accessor is not available.
    */
   Events get on => new Events(this);
 $!MEMBERS
 }