Dart: Adds a content handler and a test.

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 bindings;

[abarth-chromium, 2015/01/16 05:43:43]

We should start a new package for these files.  They're not part of the
bindings.  Instead there's part of the application framework.

[zra, 2015/01/16 17:54:51]

Moved to an application library under //services/dart

+
+// The Application interface doesn't explicitly have a Shell as a Client, but
+// that is what is at the other end of the MessagePipe.
+abstract class Application extends application.ApplicationInterface
+                           with shell.ShellCalls {
+  List<service_provider.ServiceProviderClient> _clients;
+
+  Application(core.MojoMessagePipeEndpoint endpoint) :
+      _clients = [],
+      super(endpoint);
+
+  Application.fromHandle(core.MojoHandle shellHandle) :
+      _clients = [],
+      super.fromHandle(shellHandle);
+
+  Function interfaceFactoryClosure();
+
+  void initialize(List<String> args) {
+  }
+
+  void acceptConnection(
+      String requestorUrl,
+      service_provider.ServiceProviderInterface services,
+      service_provider.ServiceProviderClient exposedServices) {
+    var serviceProvider = new ServiceProvider(interfaceFactoryClosure());
+    services.delegate = serviceProvider;
+    services.listen();
+  }
+
+  core.MojoMessagePipeEndpoint connectToService(String url, String service) {
+    var applicationPipe = new core.MojoMessagePipe();
+    var clientEndpoint = applicationPipe.endpoints[0];
+    var applicationEndpoint = applicationPipe.endpoints[1];
+    var serviceProviderClient =
+        new service_provider.ServiceProviderClient.unbound();
+    callConnectToApplication(url, serviceProviderClient, null);
+    serviceProviderClient.callConnectToService(service, applicationEndpoint);
+    _clients.add(serviceProviderClient);
+    return clientEndpoint;
+  }
+
+  void close() {
+    _clients.forEach((c) => c.close());
+    _clients.clear();
+    super.close();
+  }
+}
+
+
+// TODO(zra): Is this generally useful? If not remove.
+// A ClientApplication is a Mojo Application that does not provide any
+// services (does not implement any interfaces).
+abstract class ClientApplication extends Application {
+  ClientApplication(core.MojoMessagePipeEndpoint endpoint) : super(endpoint);
+
+  ClientApplication.fromHandle(core.MojoHandle shellHandle) :
+      super.fromHandle(shellHandle);
+
+  Function interfaceFactoryClosure() => () => null;
+
+  void initialize(List<String> args) {
+    run(args);
+  }
+
+  void acceptConnection(
+      String requestorUrl,
+      service_provider.ServiceProviderInterface services,
+      service_provider.ServiceProviderClient exposedServices) {
+  }
+
+  run(List<String> args) async;
+}