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   ~GamepadSharedMemoryReader() override;
  22
  23   // RendererGamepadProvider implementation.
  24   void SampleGamepads(blink::WebGamepads& gamepads) override;
  25   bool OnControlMessageReceived(const IPC::Message& message) override;
  26   void Start(blink::WebPlatformEventListener* listener) override;
  27
  28  protected:
  29   // PlatformEventObserver protected methods.
  30   void SendStartMessage() override;
  31   void SendStopMessage() override;
  32
  33  private:
  34   void OnGamepadConnected(int index, const blink::WebGamepad& gamepad);
  35   void OnGamepadDisconnected(int index, const blink::WebGamepad& gamepad);
  36
  37   base::SharedMemoryHandle renderer_shared_memory_handle_;
  38   scoped_ptr<base::SharedMemory> renderer_shared_memory_;
  39   GamepadHardwareBuffer* gamepad_hardware_buffer_;
  40
  41   bool ever_interacted_with_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(GamepadSharedMemoryReader);
  44 };
  45
  46 }  // namespace content
  47
  48 #endif  // CONTENT_RENDERER_GAMEPAD_SHARED_MEMORY_READER_H_