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      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   virtual ~GamepadPlatformDataFetcherLinux();
     29 
     30   // GamepadDataFetcher implementation.
     31   virtual 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_
     57