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      1 // Copyright 2013 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 "ash/system/chromeos/power/user_activity_notifier.h"
      6 
      7 #include "ash/shell.h"
      8 #include "ash/wm/user_activity_detector.h"
      9 #include "chromeos/dbus/dbus_thread_manager.h"
     10 #include "chromeos/dbus/power_manager_client.h"
     11 #include "ui/events/event.h"
     12 #include "ui/events/event_constants.h"
     13 #include "ui/events/keycodes/keyboard_codes_posix.h"
     14 
     15 namespace ash {
     16 namespace internal {
     17 
     18 namespace {
     19 
     20 // Minimum number of seconds between notifications.
     21 const int kNotifyIntervalSec = 5;
     22 
     23 }  // namespace
     24 
     25 UserActivityNotifier::UserActivityNotifier(UserActivityDetector* detector)
     26     : detector_(detector) {
     27   detector_->AddObserver(this);
     28 }
     29 
     30 UserActivityNotifier::~UserActivityNotifier() {
     31   detector_->RemoveObserver(this);
     32 }
     33 
     34 void UserActivityNotifier::OnUserActivity(const ui::Event* event) {
     35   base::TimeTicks now = base::TimeTicks::Now();
     36   // InSeconds() truncates rather than rounding, so it's fine for this
     37   // comparison.
     38   if (last_notify_time_.is_null() ||
     39       (now - last_notify_time_).InSeconds() >= kNotifyIntervalSec) {
     40     power_manager::UserActivityType type = power_manager::USER_ACTIVITY_OTHER;
     41     if (event && event->type() == ui::ET_KEY_PRESSED) {
     42       switch (static_cast<const ui::KeyEvent*>(event)->key_code()) {
     43         case ui::VKEY_BRIGHTNESS_UP:
     44           type = power_manager::USER_ACTIVITY_BRIGHTNESS_UP_KEY_PRESS;
     45           break;
     46         case ui::VKEY_BRIGHTNESS_DOWN:
     47           type = power_manager::USER_ACTIVITY_BRIGHTNESS_DOWN_KEY_PRESS;
     48           break;
     49         default:
     50           break;
     51       }
     52     }
     53 
     54     chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
     55         NotifyUserActivity(type);
     56     last_notify_time_ = now;
     57   }
     58 }
     59 
     60 }  // namespace internal
     61 }  // namespace ash
     62