athena/screen_lock/chrome/chrome_screen_lock_manager.cc

   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 #include "athena/input/public/accelerator_manager.h"
   6 #include "athena/input/public/input_manager.h"
   7 #include "athena/screen_lock/screen_lock_manager_base.h"
   8 #include "base/logging.h"
   9 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
  10
  11 namespace athena {
  12 namespace {
  13
  14 enum Command {
  15   CMD_LOCK_SCREEN
  16 };
  17
  18 const AcceleratorData accelerator_data[] = {
  19     { TRIGGER_ON_PRESS, ui::VKEY_L,  ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
  20       CMD_LOCK_SCREEN,  AF_NONE }};
  21
  22 class ChromeScreenLockManager : public ScreenLockManagerBase,
  23                                 public AcceleratorHandler,
  24                                 public PowerButtonObserver {
  25  public:
  26   ChromeScreenLockManager() {}
  27
  28   void Init();
  29
  30  protected:
  31   ~ChromeScreenLockManager() override;
  32
  33  private:
  34   // ScreenLockManager:
  35   void LockScreen() override;
  36
  37   // AcceleratorHandler:
  38   bool IsCommandEnabled(int command_id) const override;
  39   bool OnAcceleratorFired(int command_id,
  40                           const ui::Accelerator& accelerator) override;
  41
  42   // PowerButtonObserver:
  43   void OnPowerButtonStateChanged(State state) override;
  44
  45   DISALLOW_COPY_AND_ASSIGN(ChromeScreenLockManager);
  46 };
  47
  48 ChromeScreenLockManager::~ChromeScreenLockManager() {
  49   InputManager::Get()->RemovePowerButtonObserver(this);
  50 }
  51
  52 void ChromeScreenLockManager::Init() {
  53   AcceleratorManager::Get()->RegisterAccelerators(
  54       accelerator_data, arraysize(accelerator_data), this);
  55   InputManager::Get()->AddPowerButtonObserver(this);
  56 }
  57
  58 void ChromeScreenLockManager::LockScreen() {
  59   chromeos::ScreenLocker::HandleLockScreenRequest();
  60 }
  61
  62 bool ChromeScreenLockManager::IsCommandEnabled(int command_id) const {
  63   return true;
  64 }
  65
  66 bool ChromeScreenLockManager::OnAcceleratorFired(
  67     int command_id,
  68     const ui::Accelerator& accelerator) {
  69   switch (command_id) {
  70     case CMD_LOCK_SCREEN:
  71       LockScreen();
  72       return true;
  73
  74     default:
  75       NOTREACHED();
  76   }
  77   return false;
  78 }
  79
  80 void ChromeScreenLockManager::OnPowerButtonStateChanged(State state) {
  81   if (state == PRESSED)
  82     LockScreen();
  83 }
  84
  85 }  // namespace
  86
  87 // static
  88 ScreenLockManager* ScreenLockManager::Create() {
  89   ChromeScreenLockManager* instance = new ChromeScreenLockManager();
  90   instance->Init();
  91   return instance;
  92 }
  93
  94 }  // namespace athena