Home | History | Annotate | Download | only in device 
      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/threading/thread_checker.h"
     15 #include "device/hid/input_service_linux.h"
     16 
     17 namespace chromeos {
     18 
     19 // Proxy to device::InputServiceLinux. Should be created and used on the UI
     20 // thread.
     21 class InputServiceProxy {
     22  public:
     23   typedef device::InputServiceLinux::InputDeviceInfo InputDeviceInfo;
     24 
     25   class Observer {
     26    public:
     27     virtual ~Observer() {}
     28     virtual void OnInputDeviceAdded(const InputDeviceInfo& info) = 0;
     29     virtual void OnInputDeviceRemoved(const std::string& id) = 0;
     30   };
     31 
     32   typedef base::Callback<void(const std::vector<InputDeviceInfo>& devices)>
     33       GetDevicesCallback;
     34   typedef base::Callback<void(bool success, const InputDeviceInfo& info)>
     35       GetDeviceInfoCallback;
     36 
     37   InputServiceProxy();
     38   ~InputServiceProxy();
     39 
     40   // Used for early init for cashing info about available HID.
     41   static void WarmUp();
     42 
     43   void AddObserver(Observer* observer);
     44   void RemoveObserver(Observer* observer);
     45 
     46   void GetDevices(const GetDevicesCallback& callback);
     47   void GetDeviceInfo(const std::string& id,
     48                      const GetDeviceInfoCallback& callback);
     49 
     50  private:
     51   class ServiceObserver;
     52 
     53   void OnDeviceAdded(const device::InputServiceLinux::InputDeviceInfo& info);
     54   void OnDeviceRemoved(const std::string& id);
     55 
     56   ObserverList<Observer> observers_;
     57   scoped_ptr<ServiceObserver> service_observer_;
     58 
     59   base::ThreadChecker thread_checker_;
     60 
     61   base::WeakPtrFactory<InputServiceProxy> weak_factory_;
     62 
     63   DISALLOW_COPY_AND_ASSIGN(InputServiceProxy);
     64 };
     65 
     66 }  // namespace chromeos
     67 
     68 #endif  // CHROME_BROWSER_CHROMEOS_DEVICE_INPUT_SERVICE_PROXY_H_
     69