src/content/renderer/gamepad_shared_memory_reader.h

   1 // Copyright (c) 2011 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 CONTENT_RENDERER_GAMEPAD_SHARED_MEMORY_READER_H_
   6 #define CONTENT_RENDERER_GAMEPAD_SHARED_MEMORY_READER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/memory/shared_memory.h"
  10 #include "content/common/gamepad_messages.h"
  11 #include "content/public/renderer/render_process_observer.h"
  12 #include "third_party/WebKit/public/platform/WebGamepads.h"
  13
  14 namespace blink { class WebGamepadListener; }
  15
  16 namespace content {
  17
  18 struct GamepadHardwareBuffer;
  19
  20 class GamepadSharedMemoryReader : public RenderProcessObserver {
  21  public:
  22   GamepadSharedMemoryReader();
  23   virtual ~GamepadSharedMemoryReader();
  24
  25   void SampleGamepads(blink::WebGamepads& gamepads);
  26   void SetGamepadListener(blink::WebGamepadListener* listener);
  27
  28   // RenderProcessObserver implementation.
  29   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
  30
  31  private:
  32   void OnGamepadConnected(int index, const blink::WebGamepad& gamepad);
  33   void OnGamepadDisconnected(int index, const blink::WebGamepad& gamepad);
  34
  35   void StartPollingIfNecessary();
  36   void StopPollingIfNecessary();
  37
  38   base::SharedMemoryHandle renderer_shared_memory_handle_;
  39   scoped_ptr<base::SharedMemory> renderer_shared_memory_;
  40   GamepadHardwareBuffer* gamepad_hardware_buffer_;
  41   blink::WebGamepadListener* gamepad_listener_;
  42
  43   bool is_polling_;
  44   bool ever_interacted_with_;
  45 };
  46
  47 }  // namespace content
  48
  49 #endif  // CONTENT_RENDERER_GAMEPAD_SHARED_MEMORY_READER_H_