MutationObserver

lib/dom/idl/dart/dart.idl

 
 // This file introduces / supplements and forces Dart declarations.
 
 module default {
   FileList implements sequence<File>;
   HTMLCollection implements sequence<Node>;
   MediaList implements sequence<DOMString>;
   NamedNodeMap implements sequence<Node>;
   NodeList implements sequence<Node>;
   StyleSheetList implements sequence<StyleSheet>;
@@ skipping 259 matching lines @@
   [Supplemental, Callback] // Add missing Callback attribute.
   interface VoidCallback {
   };
 };
 
 module svg {
   interface SVGNumber {
     [StrictTypeChecking, Custom] attribute float value;
   };
 }
+
+module core {
+  [Supplemental]
+  interface MutationCallback {
+    // Change MutationRecordArray to MutationRecord[].
+    [Suppressed, Custom] boolean handleEvent(in MutationRecordArray mutations, in WebKitMutationObserver observer);
+    [Custom] boolean handleEvent(in MutationRecord[] mutations, in WebKitMutationObserver observer);
+  };
+
+  [Supplemental,
+   CustomConstructor,
+   // Provide missing constructor signature.
+   Constructor(MutationCallback callback)]
+  interface WebKitMutationObserver {
+    // Rename 'observe' so we can define a new 'observe' API implemented using
+    // the original.
+    [DartName=_observe] void observe(in Node target, in Dictionary options)

[Anton Muhin, 2012/07/13 10:50:47]

as you probably already know, that's exactly the signature in WebKit idl:
http://trac.webkit.org/browser/trunk/Source/WebCore/dom/MutationObserver.idl?...

[sra1, 2012/07/19 00:34:54]

Yes.  To copy the extended attribute DartName onto the operation it must be the
matching overload.

+        raises(DOMException);
+  };
+}