content/browser/gamepad/gamepad_platform_data_fetcher_linux.h

   1 // Copyright (c) 2012 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_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_LINUX_H_
   6 #define CONTENT_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_LINUX_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "content/browser/gamepad/gamepad_data_fetcher.h"
  14 #include "content/browser/gamepad/gamepad_standard_mappings.h"
  15 #include "third_party/WebKit/public/platform/WebGamepads.h"
  16
  17 extern "C" {
  18 struct udev_device;
  19 }
  20
  21 namespace content {
  22
  23 class UdevLinux;
  24
  25 class GamepadPlatformDataFetcherLinux : public GamepadDataFetcher {
  26  public:
  27   GamepadPlatformDataFetcherLinux();
  28   ~GamepadPlatformDataFetcherLinux() override;
  29
  30   // GamepadDataFetcher implementation.
  31   void GetGamepadData(blink::WebGamepads* pads,
  32                       bool devices_changed_hint) override;
  33
  34  private:
  35   void RefreshDevice(udev_device* dev);
  36   void EnumerateDevices();
  37   void ReadDeviceData(size_t index);
  38
  39   // File descriptors for the /dev/input/js* devices. -1 if not in use.
  40   int device_fds_[blink::WebGamepads::itemsLengthCap];
  41
  42   // Functions to map from device data to standard layout, if available. May
  43   // be null if no mapping is available.
  44   GamepadStandardMappingFunction mappers_[blink::WebGamepads::itemsLengthCap];
  45
  46   // Data that's returned to the consumer.
  47   blink::WebGamepads data_;
  48
  49   scoped_ptr<UdevLinux> udev_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(GamepadPlatformDataFetcherLinux);
  52 };
  53
  54 }  // namespace content
  55
  56 #endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_LINUX_H_