Rationalize Dart mojo and sky package structure

mojo/public/dart/src/application.dart

-// Copyright 2014 The Chromium Authors. 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 application;
-
-class _ApplicationImpl implements application_mojom.Application {
-  application_mojom.ApplicationStub _stub;
-  shell_mojom.ShellProxy shell;
-  Application _application;
-
-  _ApplicationImpl(
-      Application application, core.MojoMessagePipeEndpoint endpoint) {
-    _application = application;
-    _stub = new application_mojom.ApplicationStub.fromEndpoint(endpoint, this);
-    _stub.onError = close;
-  }
-
-  _ApplicationImpl.fromHandle(Application application, core.MojoHandle handle) {
-    _application = application;
-    _stub = new application_mojom.ApplicationStub.fromHandle(handle, this);
-    _stub.onError = close;
-  }
-
-  set onError(core.ErrorHandler f) {
-    _stub.onError = f;
-  }
-
-  void initialize(
-      bindings.ProxyBase shellProxy, List<String> args, String url) {
-    assert(shell == null);
-    shell = shellProxy;
-    _application.initialize(args, url);
-  }
-
-  @override
-  void acceptConnection(String requestorUrl, ServiceProviderStub services,
-      bindings.ProxyBase exposedServices, String resolvedUrl) => _application
-      ._acceptConnection(requestorUrl, services, exposedServices, resolvedUrl);
-
-  @override
-  void requestQuit() => _application._requestQuitAndClose();
-
-  Future close({bool immediate: false}) {
-    if (shell != null) {
-      shell.close(immediate: immediate);
-    }
-    return _stub.close(immediate: immediate);
-  }
-}
-
-// TODO(zra): Better documentation and examples.
-// To implement, do the following:
-// - Optionally override initialize() to process command-line args.
-// - Optionally override acceptConnection() if services are to be provided.
-// - Optionally override close() to clean up application resources.
-abstract class Application {
-  _ApplicationImpl _applicationImpl;
-  List<ApplicationConnection> _applicationConnections;
-  Function onError;
-
-  Application(core.MojoMessagePipeEndpoint endpoint) {
-    _applicationConnections = [];
-    _applicationImpl = new _ApplicationImpl(this, endpoint);
-    _applicationImpl.onError = _errorHandler;
-  }
-
-  Application.fromHandle(core.MojoHandle appHandle) {
-    _applicationConnections = [];
-    _applicationImpl = new _ApplicationImpl.fromHandle(this, appHandle);
-    _applicationImpl.onError = _errorHandler;
-  }
-
-  void initialize(List<String> args, String url) {}
-
-  // TODO(skydart): This is a temporary fix to allow sky application to consume
-  // mojo services. Do not use for any other purpose.
-  void initializeFromShellProxy(
-          shell_mojom.ShellProxy shellProxy, List<String> args, String url) =>
-      _applicationImpl.initialize(shellProxy, args, url);
-
-  // Returns a connection to the app at |url|.
-  ApplicationConnection connectToApplication(String url) {
-    var proxy = new ServiceProviderProxy.unbound();
-    var stub = new ServiceProviderStub.unbound();
-    _applicationImpl.shell.ptr.connectToApplication(url, proxy, stub);
-    var connection = new ApplicationConnection(stub, proxy);
-    _applicationConnections.add(connection);
-    return connection;
-  }
-
-  void connectToService(String url, bindings.ProxyBase proxy) {
-    connectToApplication(url).requestService(proxy);
-  }
-
-  void requestQuit() {}
-
-  void _requestQuitAndClose() {
-    requestQuit();
-    close();
-  }
-
-  void _errorHandler() {
-    close().then((_) {
-      if (onError != null) onError();
-    });
-  }
-
-  Future close({bool immediate: false}) {
-    assert(_applicationImpl != null);
-    _applicationConnections.forEach((c) => c.close(immediate: immediate));
-    _applicationConnections.clear();
-    return _applicationImpl.close(immediate: immediate);
-  }
-
-  // This method closes all the application connections. Used during apptesting.
-  void resetConnections() {
-    assert(_applicationImpl != null);
-    _applicationConnections.forEach((c) => c.close());
-    _applicationConnections.clear();
-  }
-
-  void _acceptConnection(String requestorUrl, ServiceProviderStub services,
-      ServiceProviderProxy exposedServices, String resolvedUrl) {
-    var connection = new ApplicationConnection(services, exposedServices);
-    _applicationConnections.add(connection);
-    acceptConnection(requestorUrl, resolvedUrl, connection);
-  }
-
-  // Override this method to provide services on |connection|.
-  void acceptConnection(String requestorUrl, String resolvedUrl,
-      ApplicationConnection connection) {}
-}