chrome/browser/chromeos/device/input_service_proxy.h

   1 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_DEVICE_INPUT_SERVICE_PROXY_H_
   6 #define CHROME_BROWSER_CHROMEOS_DEVICE_INPUT_SERVICE_PROXY_H_
   7
   8 #include <vector>
   9
  10 #include "base/callback.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/observer_list.h"
  14 #include "base/task_runner.h"
  15 #include "base/threading/thread_checker.h"
  16 #include "content/public/browser/browser_thread.h"
  17 #include "device/hid/input_service_linux.h"
  18
  19 namespace chromeos {
  20
  21 // Proxy to device::InputServiceLinux. Should be created and used on the UI
  22 // thread.
  23 class InputServiceProxy {
  24  public:
  25   typedef device::InputServiceLinux::InputDeviceInfo InputDeviceInfo;
  26
  27   class Observer {
  28    public:
  29     virtual ~Observer() {}
  30     virtual void OnInputDeviceAdded(const InputDeviceInfo& info) = 0;
  31     virtual void OnInputDeviceRemoved(const std::string& id) = 0;
  32   };
  33
  34   typedef base::Callback<void(const std::vector<InputDeviceInfo>& devices)>
  35       GetDevicesCallback;
  36   typedef base::Callback<void(bool success, const InputDeviceInfo& info)>
  37       GetDeviceInfoCallback;
  38
  39   InputServiceProxy();
  40   ~InputServiceProxy();
  41
  42   void AddObserver(Observer* observer);
  43   void RemoveObserver(Observer* observer);
  44
  45   void GetDevices(const GetDevicesCallback& callback);
  46   void GetDeviceInfo(const std::string& id,
  47                      const GetDeviceInfoCallback& callback);
  48
  49   // Should be called once before any InputServiceProxy instance is created.
  50   static void SetThreadIdForTesting(content::BrowserThread::ID thread_id);
  51
  52  private:
  53   static content::BrowserThread::ID thread_identifier_;
  54
  55   class ServiceObserver;
  56
  57   void OnDeviceAdded(const device::InputServiceLinux::InputDeviceInfo& info);
  58   void OnDeviceRemoved(const std::string& id);
  59
  60   base::ObserverList<Observer> observers_;
  61   scoped_ptr<ServiceObserver> service_observer_;
  62
  63   base::ThreadChecker thread_checker_;
  64
  65   scoped_refptr<base::TaskRunner> task_runner_;
  66
  67   base::WeakPtrFactory<InputServiceProxy> weak_factory_;
  68
  69   DISALLOW_COPY_AND_ASSIGN(InputServiceProxy);
  70 };
  71
  72 }  // namespace chromeos
  73
  74 #endif  // CHROME_BROWSER_CHROMEOS_DEVICE_INPUT_SERVICE_PROXY_H_