[Chromoting] Request the daemon to open a terminal once a connection has been accepted.

remoting/host/ipc_desktop_environment_factory.h

Index: remoting/host/ipc_desktop_environment_factory.h
diff --git a/remoting/host/ipc_desktop_environment_factory.h b/remoting/host/ipc_desktop_environment_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..91086fb58c18f27d39e39596809e0012694930b2
--- /dev/null
+++ b/remoting/host/ipc_desktop_environment_factory.h
@@ -0,0 +1,69 @@
+// Copyright (c) 2012 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.
+
+#ifndef REMOTING_HOST_IPC_DESKTOP_ENVIRONMENT_FACTORY_H_
+#define REMOTING_HOST_IPC_DESKTOP_ENVIRONMENT_FACTORY_H_
+
+#include <map>
+
+#include "base/memory/scoped_ptr.h"
+#include "remoting/host/desktop_environment_factory.h"
+#include "remoting/host/desktop_session_connector.h"
+
+namespace IPC {
+class ChannelProxy;
+}  // namespace IPC
+
+namespace remoting {
+
+class DesktopSessionConnector;
+class IpcDesktopEnvironment;
+
+// Used to create IpcDesktopEnvironment objects intergating with the desktop via
+// a helper process and talking to that process via IPC.
+class IpcDesktopEnvironmentFactory
+    : public DesktopEnvironmentFactory,
+      public DesktopSessionConnector {
+ public:
+  // Passes a reference to the IPC channel connected to the daemon process and
+  // relevant task runners. |daemon_channel| must outlive this object.
+  IpcDesktopEnvironmentFactory(
+      IPC::ChannelProxy* daemon_channel,

[Wez, 2012/10/17 17:51:57]

nit: Is there a way to get a ref-counted or owned-and-multiplexed handle to an
IPC channel?

[alexeypa (please no reviews), 2012/10/17 21:35:53]

I don't think it is possible without a custom ChannelProxy.

+      scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> network_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
+  virtual ~IpcDesktopEnvironmentFactory();
+
+  virtual scoped_ptr<DesktopEnvironment> Create(
+      scoped_refptr<ChromotingHost> host) OVERRIDE;
+
+  // DesktopSessionConnector implementation.
+  virtual void ConnectTerminal(
+      IpcDesktopEnvironment* desktop_environment) OVERRIDE;
+  virtual void DisconnectTerminal(
+      IpcDesktopEnvironment* desktop_environment) OVERRIDE;
+  virtual void OnTerminalDisconnected(int terminal_id) OVERRIDE;
+
+ private:
+  // A list of DesktopEnvironment instances known to the daemon process.

[Wez, 2012/10/17 17:51:57]

nit: "List of instances we've told the daemon process about."

[alexeypa (please no reviews), 2012/10/17 21:35:53]

Done.

+  typedef std::map<int, IpcDesktopEnvironment*> ActiveConnectionsList;
+  ActiveConnectionsList active_connections_;

[Wez, 2012/10/17 17:51:57]

nit: Move this down below the members that come from ctor parameters.

[alexeypa (please no reviews), 2012/10/17 21:35:53]

Done.

+
+  // IPC channel connected to the daemon process.
+  IPC::ChannelProxy* daemon_channel_;
+
+  // Task runner the bulk of DesktopSessionConnector implementation runs on.

[Wez, 2012/10/17 17:51:57]

nit: Clarify this; e.g. "Used to service calls to the DesktopSessionConnector
APIs".

[alexeypa (please no reviews), 2012/10/17 21:35:53]

Done.

+  scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
+
+  // Next desktop session ID. IDs are allocated sequentially starting from 0.
+  // This gives us more than 67 years of unique IDs assuming a new ID is
+  // allocated every second.
+  static int next_id_;

[Wez, 2012/10/17 17:51:57]

nit: This doesn't need to be static, I don't think, since there's only one
factory per-process?

[alexeypa (please no reviews), 2012/10/17 21:35:53]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(IpcDesktopEnvironmentFactory);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_IPC_DESKTOP_ENVIRONMENT_FACTORY_H_