src/ash/system/chromeos/power/user_activity_notifier.cc

   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 // Returns a UserActivityType describing |event|.
  24 power_manager::UserActivityType GetUserActivityTypeForEvent(
  25     const ui::Event* event) {
  26   if (!event || event->type() != ui::ET_KEY_PRESSED)
  27     return power_manager::USER_ACTIVITY_OTHER;
  28
  29   switch (static_cast<const ui::KeyEvent*>(event)->key_code()) {
  30     case ui::VKEY_BRIGHTNESS_DOWN:
  31       return power_manager::USER_ACTIVITY_BRIGHTNESS_DOWN_KEY_PRESS;
  32     case ui::VKEY_BRIGHTNESS_UP:
  33       return power_manager::USER_ACTIVITY_BRIGHTNESS_UP_KEY_PRESS;
  34     case ui::VKEY_VOLUME_DOWN:
  35       return power_manager::USER_ACTIVITY_VOLUME_DOWN_KEY_PRESS;
  36     case ui::VKEY_VOLUME_MUTE:
  37       return power_manager::USER_ACTIVITY_VOLUME_MUTE_KEY_PRESS;
  38     case ui::VKEY_VOLUME_UP:
  39       return power_manager::USER_ACTIVITY_VOLUME_UP_KEY_PRESS;
  40     default:
  41       return power_manager::USER_ACTIVITY_OTHER;
  42   }
  43 }
  44
  45 }  // namespace
  46
  47 UserActivityNotifier::UserActivityNotifier(UserActivityDetector* detector)
  48     : detector_(detector) {
  49   detector_->AddObserver(this);
  50 }
  51
  52 UserActivityNotifier::~UserActivityNotifier() {
  53   detector_->RemoveObserver(this);
  54 }
  55
  56 void UserActivityNotifier::OnUserActivity(const ui::Event* event) {
  57   base::TimeTicks now = base::TimeTicks::Now();
  58   // InSeconds() truncates rather than rounding, so it's fine for this
  59   // comparison.
  60   if (last_notify_time_.is_null() ||
  61       (now - last_notify_time_).InSeconds() >= kNotifyIntervalSec) {
  62     chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
  63         NotifyUserActivity(GetUserActivityTypeForEvent(event));
  64     last_notify_time_ = now;
  65   }
  66 }
  67
  68 }  // namespace internal
  69 }  // namespace ash