Remove the shared js_isolate_impl and the current js/dart interop implementation.

lib/html/src/Isolates.dart

-// 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.
-
-_serialize(var message) {
-  return new _JsSerializer().traverse(message);
-}
-
-class _JsSerializer extends _Serializer {
-
-  visitSendPortSync(SendPortSync x) {
-    if (x is _JsSendPortSync) return visitJsSendPortSync(x);
-    if (x is _LocalSendPortSync) return visitLocalSendPortSync(x);
-    if (x is _RemoteSendPortSync) return visitRemoteSendPortSync(x);
-    throw "Illegal underlying port $x";
-  }
-
-  visitJsSendPortSync(_JsSendPortSync x) {
-    return [ 'sendport', 'nativejs', x._id ];
-  }
-
-  visitLocalSendPortSync(_LocalSendPortSync x) {
-    return [ 'sendport', 'dart',
-             ReceivePortSync._isolateId, x._receivePort._portId ];
-  }
-
-  visitRemoteSendPortSync(_RemoteSendPortSync x) {
-    return [ 'sendport', 'dart',
-             x._receivePort._isolateId, x._receivePort._portId ];
-  }
-
-  visitObject(Object x) {
-    if (x is Function) return visitFunction(x);
-    // TODO: Handle DOM elements and proxy other objects.
-    throw "Unserializable object $x";
- }
-
-  visitFunction(Function func) {
-    return [ 'funcref',
-              _makeFunctionRef(func), visitSendPortSync(_sendPort()), null ];
-  }
-}
-
-// Leaking implementation.  Later will be backend specific and hopefully
-// not leaking (at least in most of the cases.)
-// TODO: provide better, backend specific implementation.
-class _FunctionRegistry {
-  final ReceivePortSync _port;
-  int _nextId;
-  final Map<String, Function> _registry;
-
-  _FunctionRegistry() :
-      _port = new ReceivePortSync(),
-      _nextId = 0,
-      _registry = <Function>{} {
-    _port.receive((msg) {
-      final id = msg[0];
-      final args = msg[1];
-      final f = _registry[id];
-      switch (args.length) {
-        case 0: return f();
-        case 1: return f(args[0]);
-        case 2: return f(args[0], args[1]);
-        case 3: return f(args[0], args[1], args[2]);
-        case 4: return f(args[0], args[1], args[2], args[3]);
-        default: throw 'Unsupported number of arguments.';
-      }
-    });
-  }
-
-  String _add(Function f) {
-    final id = 'func-ref-${_nextId++}';
-    _registry[id] = f;
-    return id;
-  }
-
-  get _sendPort() => _port.toSendPort();
-}
-
-_FunctionRegistry __functionRegistry;
-get _functionRegistry() {
-  if (__functionRegistry === null) __functionRegistry = new _FunctionRegistry();
-  return __functionRegistry;
-}
-
-_makeFunctionRef(f) => _functionRegistry._add(f);
-_sendPort() => _functionRegistry._sendPort;
-/// End of function serialization implementation.
-
-_deserialize(var message) {
-  return new _JsDeserializer().deserialize(message);
-}
-
-class _JsDeserializer extends _Deserializer {
-
-  static final _UNSPECIFIED = const Object();
-
-  deserializeSendPort(List x) {
-    String tag = x[1];
-    switch (tag) {
-      case 'nativejs':
-        num id = x[2];
-        return new _JsSendPortSync(id);
-      case 'dart':
-        num isolateId = x[2];
-        num portId = x[3];
-        return ReceivePortSync._lookup(isolateId, portId);
-      default:
-        throw 'Illegal SendPortSync type: $tag';
-    }
-  }
-
-  deserializeObject(List x) {
-    String tag = x[0];
-    switch (tag) {
-      case 'funcref': return deserializeFunction(x);
-      default: throw 'Illegal object type: $x';
-    }
-  }
-
-  deserializeFunction(List x) {
-    var id = x[1];
-    SendPortSync port = deserializeSendPort(x[2]);
-    // TODO: Support varargs when there is support in the language.
-    return ([arg0 = _UNSPECIFIED, arg1 = _UNSPECIFIED,
-              arg2 = _UNSPECIFIED, arg3 = _UNSPECIFIED]) {
-      var args = [arg0, arg1, arg2, arg3];
-      var last = args.indexOf(_UNSPECIFIED);
-      if (last >= 0) args = args.getRange(0, last);
-      var message = [id, args];
-      return port.callSync(message);
-    };
-  }
-}
-
-// The receiver is JS.
-class _JsSendPortSync implements SendPortSync {
-
-  num _id;
-  _JsSendPortSync(this._id);
-
-  callSync(var message) {
-    var serialized = _serialize(message);
-    var result = _callPortSync(_id, serialized);
-    return _deserialize(result);
-  }
-
-}
-
-// TODO(vsm): Differentiate between Dart2Js and Dartium isolates.
-// The receiver is a different Dart isolate, compiled to JS.
-class _RemoteSendPortSync implements SendPortSync {
-
-  int _isolateId;
-  int _portId;
-  _RemoteSendPortSync(this._isolateId, this._portId);
-
-  callSync(var message) {
-    var serialized = _serialize(message);
-    var result = _call(_isolateId, _portId, serialized);
-    return _deserialize(result);
-  }
-
-  static _call(int isolateId, int portId, var message) {
-    var target = 'dart-port-$isolateId-$portId'; 
-    // TODO(vsm): Make this re-entrant.
-    // TODO(vsm): Set this up set once, on the first call.
-    var source = '$target-result';
-    var result = null;
-    var listener = (TextEvent e) {
-      result = JSON.parse(e.data);
-    };
-    window.on[source].add(listener);
-    _dispatchEvent(target, [source, message]);
-    window.on[source].remove(listener);
-    return result;
-  }
-}
-
-// The receiver is in the same Dart isolate, compiled to JS.
-class _LocalSendPortSync implements SendPortSync {
-
-  ReceivePortSync _receivePort;
-
-  _LocalSendPortSync._internal(this._receivePort);
-
-  callSync(var message) {
-    // TODO(vsm): Do a more efficient deep copy.
-    var copy = _deserialize(_serialize(message));
-    var result = _receivePort._callback(copy);
-    return _deserialize(_serialize(result));
-  }
-}
-
-// TODO(vsm): Move this to dart:isolate.  This will take some
-// refactoring as there are dependences here on the DOM.  Users
-// interact with this class (or interface if we change it) directly -
-// new ReceivePortSync.  I think most of the DOM logic could be
-// delayed until the corresponding SendPort is registered on the
-// window.
-
-// A Dart ReceivePortSync (tagged 'dart' when serialized) is
-// identifiable / resolvable by the combination of its isolateid and
-// portid.  When a corresponding SendPort is used within the same
-// isolate, the _portMap below can be used to obtain the
-// ReceivePortSync directly.  Across isolates (or from JS), an
-// EventListener can be used to communicate with the port indirectly.
-class ReceivePortSync {
-
-  static Map<int, ReceivePortSync> _portMap;
-  static int _portIdCount;
-  static int _cachedIsolateId;
-
-  num _portId;
-  Function _callback;
-  EventListener _listener;
-
-  ReceivePortSync() {
-    if (_portIdCount == null) {
-      _portIdCount = 0;
-      _portMap = new Map<int, ReceivePortSync>();
-    }
-    _portId = _portIdCount++;
-    _portMap[_portId] = this;
-  }
-
-  static int get _isolateId() {
-    // TODO(vsm): Make this coherent with existing isolate code.
-    if (_cachedIsolateId == null) {
-      _cachedIsolateId = _getNewIsolateId();      
-    }
-    return _cachedIsolateId;
-  }
-
-  static String _getListenerName(isolateId, portId) =>
-      'dart-port-$isolateId-$portId'; 
-  String get _listenerName() => _getListenerName(_isolateId, _portId);
-
-  void receive(callback(var message)) {
-    _callback = callback;
-    if (_listener === null) {
-      _listener = (TextEvent e) {
-        var data = JSON.parse(e.data);
-        var replyTo = data[0];
-        var message = _deserialize(data[1]);
-        var result = _callback(message);
-        _dispatchEvent(replyTo, _serialize(result));
-      };
-      window.on[_listenerName].add(_listener);
-    }
-  }
-
-  void close() {
-    _portMap.remove(_portId);
-    if (_listener !== null) window.on[_listenerName].remove(_listener);
-  }
-
-  SendPortSync toSendPort() {
-    return new _LocalSendPortSync._internal(this);
-  }
-
-  static SendPortSync _lookup(int isolateId, int portId) {
-    if (isolateId == _isolateId) {
-      return _portMap[portId].toSendPort();
-    } else {
-      return new _RemoteSendPortSync(isolateId, portId);
-    }
-  }
-}
-
-void _dispatchEvent(String receiver, var message) {
-  var event = document.$dom_createEvent('TextEvent');
-  event.initTextEvent(receiver, false, false, window, JSON.stringify(message));
-  window.$dom_dispatchEvent(event);
-}