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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_ |
| 6 #define WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_ |
| 7 |
| 8 #include <string> |
| 9 |
| 10 #include "base/basictypes.h" |
| 11 #include "base/memory/scoped_ptr.h" |
| 12 #include "base/string16.h" |
| 13 #include "base/threading/non_thread_safe.h" |
| 14 #include "ipc/ipc_channel_proxy.h" |
| 15 #include "ipc/ipc_listener.h" |
| 16 #include "ipc/ipc_sender.h" |
| 17 #include "ui/gfx/native_widget_types.h" |
| 18 |
| 19 namespace base { |
| 20 class SingleThreadTaskRunner; |
| 21 class WaitableEvent; |
| 22 } |
| 23 |
| 24 namespace IPC { |
| 25 class Message; |
| 26 } |
| 27 |
| 28 namespace win8 { |
| 29 |
| 30 // Abstract base class for various Metro viewer process host implementations. |
| 31 class MetroViewerProcessHost : public IPC::Listener, |
| 32 public IPC::Sender, |
| 33 public base::NonThreadSafe { |
| 34 public: |
| 35 // Initializes a viewer process host over |ipc_channel_name|. The given task |
| 36 // runner correspond to a thread on which IPC::Channel is created and used |
| 37 // (e.g. IO thread). Instantly connects to the viewer process if one is |
| 38 // already connected to |ipc_channel_name|; a viewer can otherwise be |
| 39 // launched synchronously via LaunchViewerAndWaitForConnection(). |
| 40 MetroViewerProcessHost(const std::string& ipc_channel_name, |
| 41 base::SingleThreadTaskRunner* ipc_task_runner); |
| 42 virtual ~MetroViewerProcessHost(); |
| 43 |
| 44 // Returns the process id of the viewer process if one is connected to this |
| 45 // host, returns base::kNullProcessId otherwise. |
| 46 base::ProcessId GetViewerProcessId(); |
| 47 |
| 48 // Launches the viewer process associated with the given |app_user_model_id| |
| 49 // and blocks until that viewer process connects or until a timeout is |
| 50 // reached. Returns true if the viewer process connects before the timeout is |
| 51 // reached. NOTE: this assumes that the app referred to by |app_user_model_id| |
| 52 // is registered as the default browser. |
| 53 bool LaunchViewerAndWaitForConnection( |
| 54 const base::string16& app_user_model_id); |
| 55 |
| 56 private: |
| 57 // IPC::Sender implementation: |
| 58 virtual bool Send(IPC::Message* msg) OVERRIDE; |
| 59 |
| 60 // IPC::Listener implementation: |
| 61 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; |
| 62 virtual void OnChannelError() OVERRIDE = 0; |
| 63 |
| 64 // Called over IPC by the viewer process to tell this host that it should be |
| 65 // drawing to |target_surface|. |
| 66 virtual void OnSetTargetSurface(gfx::NativeViewId target_surface) = 0; |
| 67 |
| 68 void NotifyChannelConnected(); |
| 69 |
| 70 // Inner message filter used to handle connection event on the IPC channel |
| 71 // proxy's background thread. This prevents consumers of |
| 72 // MetroViewerProcessHost from having to pump messages on their own message |
| 73 // loop. |
| 74 class InternalMessageFilter : public IPC::ChannelProxy::MessageFilter { |
| 75 public: |
| 76 InternalMessageFilter(MetroViewerProcessHost* owner); |
| 77 |
| 78 // IPC::ChannelProxy::MessageFilter implementation. |
| 79 virtual void OnChannelConnected(int32 peer_pid) OVERRIDE; |
| 80 |
| 81 private: |
| 82 MetroViewerProcessHost* owner_; |
| 83 DISALLOW_COPY_AND_ASSIGN(InternalMessageFilter); |
| 84 }; |
| 85 |
| 86 scoped_ptr<IPC::ChannelProxy> channel_; |
| 87 scoped_ptr<base::WaitableEvent> channel_connected_event_; |
| 88 |
| 89 DISALLOW_COPY_AND_ASSIGN(MetroViewerProcessHost); |
| 90 }; |
| 91 |
| 92 } // namespace win8 |
| 93 |
| 94 #endif // WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_ |
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