add JsArray and JsObject.asJsMap()

sdk/lib/js/dartium/js_dartium.dart

Index: sdk/lib/js/dartium/js_dartium.dart
diff --git a/sdk/lib/js/dartium/js_dartium.dart b/sdk/lib/js/dartium/js_dartium.dart
index 393320f91ffd8f70fe532342e4164d54a8e452d1..ceb81c775ba13aacc8c1cc900331a8ee52e98de7 100644
--- a/sdk/lib/js/dartium/js_dartium.dart
+++ b/sdk/lib/js/dartium/js_dartium.dart
@@ -66,6 +66,7 @@
 
 library dart.js;
 
+import 'dart:collection' show ListMixin, Maps;
 import 'dart:html';
 import 'dart:isolate';
 
@@ -198,6 +199,8 @@ class JsObject implements Serializable<JsObject> {
     return _forward(this, name, 'method', args != null ? args : []);
   }
 
+  Map<String, dynamic> asJsMap() => new _JsObjectAsMap(this);
+
   // Forward member accesses to the backing JavaScript object.
   static _forward(JsObject receiver, String member, String kind, List args) {
     var result = receiver._port.callSync([receiver._id, member, kind,
@@ -222,6 +225,90 @@ class JsFunction extends JsObject implements Serializable<JsFunction> {
   }
 }
 
+/// A [JsObject] subtype for JavaScript arrays.
+class JsArray extends JsObject with ListMixin {
+  JsArray._internal(SendPortSync port, String id) : super._internal(port, id);
+
+  // Iterable
+  /*@override*/ int get length => super['length'];
+
+  // Collection
+  /*@override*/ void add(value) { callMethod('push', [value]); }
+
+  // List
+  /*@override*/ operator [](index) {
+    if (index is int && (index < 0 || index >= this.length)) {
+      throw new RangeError.value(index);
+    }
+    return super[index];
+  }
+  /*@override*/ void operator []=(index, value) {
+    if (index is int && (index < 0 || index >= this.length)) {
+      throw new RangeError.value(index);
+    }
+    super[index] = value;
+  }
+  /*@override*/ void set length(int length) { super['length'] = length; }
+  /*@override*/ void sort([int compare(a, b)]) {
+    final sortedList = toList()..sort(compare);
+    setRange(0, sortedList.length, sortedList);
+  }
+  /*@override*/ void insert(int index, element) {
+    callMethod('splice', [index, 0, element]);
+  }
+  /*@override*/ removeAt(int index) {
+    if (index < 0 || index >= this.length) throw new RangeError.value(index);
+    return callMethod('splice', [index, 1])[0];
+  }
+  /*@override*/ removeLast() => callMethod('pop');
+  /*@override*/ void setRange(int start, int length, List from,
+                              [int startFrom = 0]) {
+    final args = [start, length];
+    for(int i = startFrom; i < startFrom + length; i++) {
+      args.add(from[i]);
+    }
+    callMethod('splice', args);
+  }
+  /*@override*/ void removeRange(int start, int end) {
+    callMethod('splice', [start, end - start]);
+  }
+}
+
+class _JsObjectAsMap implements Map<String, dynamic> {
+  JsObject _jsObject;
+
+  _JsObjectAsMap(this._jsObject);
+
+  /*@override*/ operator [](String key) => _jsObject[key];
+  /*@override*/ void operator []=(String key, value) {
+    _jsObject[key] = value;
+  }
+  /*@override*/ remove(String key) {
+    final value = this[key];
+    _jsObject.deleteProperty(key);
+    return value;
+  }
+  /*@override*/ Iterable<String> get keys =>
+      context['Object'].callMethod('keys', [_jsObject]);
+
+  // use Maps to implement functions
+  /*@override*/ bool containsValue(value) => Maps.containsValue(this, value);
+  /*@override*/ bool containsKey(String key) => Maps.containsKey(this, key);
+  /*@override*/ putIfAbsent(String key, ifAbsent()) =>
+      Maps.putIfAbsent(this, key, ifAbsent);
+  /*@override*/ void addAll(Map<String, dynamic> other) {
+    if (other != null) {
+      other.forEach((k,v) => this[k] = v);
+    }
+  }
+  /*@override*/ void clear() => Maps.clear(this);
+  /*@override*/ void forEach(void f(String key, value)) => Maps.forEach(this, f);
+  /*@override*/ Iterable get values => Maps.getValues(this);
+  /*@override*/ int get length => Maps.length(this);
+  /*@override*/ bool get isEmpty => Maps.isEmpty(this);
+  /*@override*/ bool get isNotEmpty => Maps.isNotEmpty(this);
+}
+
 /// Marker class used to indicate it is serializable to js. If a class is a
 /// [Serializable] the "toJs" method will be called and the result will be used
 /// as value.
@@ -318,6 +405,10 @@ _serialize(var message) {
     return _serialize(message.toJs());
   } else if (message is Function) {
     return _serialize(new Callback(message));
+  } else if (message is Map) {
+    return _serialize(jsify(message));
+  } else if (message is Iterable) {
+    return _serialize(jsify(message));
   } else {
     // Local object proxy.
     return [ 'objref',
@@ -351,6 +442,12 @@ _deserialize(var message) {
     }
   }
 
+  deserializeArray(message) {
+    var id = message[1];
+    var port = message[2];
+    return new JsArray._internal(port, id);
+  }
+
   if (message == null) {
     return null;  // Convert undefined to null.
   } else if (message is String ||
@@ -366,6 +463,7 @@ _deserialize(var message) {
   switch (tag) {
     case 'funcref': return deserializeFunction(message);
     case 'objref': return deserializeObject(message);
+    case 'arrayref': return deserializeArray(message);
   }
   throw 'Unsupported serialized data: $message';
 }