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/renderer_gamepad_provider.h"
  12 #include "third_party/WebKit/public/platform/WebGamepads.h"
  13
  14 namespace content {
  15
  16 struct GamepadHardwareBuffer;
  17
  18 class GamepadSharedMemoryReader : public RendererGamepadProvider {
  19  public:
  20   explicit GamepadSharedMemoryReader(RenderThread* thread);
  21   virtual ~GamepadSharedMemoryReader();
  22
  23   // RendererGamepadProvider implementation.
  24   virtual void SampleGamepads(
  25       blink::WebGamepads& gamepads) OVERRIDE;
  26   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
  27   virtual void Start(blink::WebPlatformEventListener* listener) OVERRIDE;
  28
  29  protected:
  30   // PlatformEventObserver protected methods.
  31   virtual void SendStartMessage() OVERRIDE;
  32   virtual void SendStopMessage() OVERRIDE;
  33
  34  private:
  35   void OnGamepadConnected(int index, const blink::WebGamepad& gamepad);
  36   void OnGamepadDisconnected(int index, const blink::WebGamepad& gamepad);
  37
  38   base::SharedMemoryHandle renderer_shared_memory_handle_;
  39   scoped_ptr<base::SharedMemory> renderer_shared_memory_;
  40   GamepadHardwareBuffer* gamepad_hardware_buffer_;
  41
  42   bool ever_interacted_with_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(GamepadSharedMemoryReader);
  45 };
  46
  47 }  // namespace content
  48
  49 #endif  // CONTENT_RENDERER_GAMEPAD_SHARED_MEMORY_READER_H_