ui/chromeos/user_activity_notifier.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 "ui/chromeos/user_activity_notifier.h"
   6
   7 #include "chromeos/dbus/dbus_thread_manager.h"
   8 #include "chromeos/dbus/power_manager_client.h"
   9 #include "ui/events/event.h"
  10 #include "ui/events/event_constants.h"
  11 #include "ui/events/keycodes/keyboard_codes_posix.h"
  12 #include "ui/wm/core/user_activity_detector.h"
  13
  14 namespace ui {
  15 namespace {
  16
  17 // Minimum number of seconds between notifications.
  18 const int kNotifyIntervalSec = 5;
  19
  20 // Returns a UserActivityType describing |event|.
  21 power_manager::UserActivityType GetUserActivityTypeForEvent(
  22     const Event* event) {
  23   if (!event || event->type() != ET_KEY_PRESSED)
  24     return power_manager::USER_ACTIVITY_OTHER;
  25
  26   switch (static_cast<const KeyEvent*>(event)->key_code()) {
  27     case VKEY_BRIGHTNESS_DOWN:
  28       return power_manager::USER_ACTIVITY_BRIGHTNESS_DOWN_KEY_PRESS;
  29     case VKEY_BRIGHTNESS_UP:
  30       return power_manager::USER_ACTIVITY_BRIGHTNESS_UP_KEY_PRESS;
  31     case VKEY_VOLUME_DOWN:
  32       return power_manager::USER_ACTIVITY_VOLUME_DOWN_KEY_PRESS;
  33     case VKEY_VOLUME_MUTE:
  34       return power_manager::USER_ACTIVITY_VOLUME_MUTE_KEY_PRESS;
  35     case VKEY_VOLUME_UP:
  36       return power_manager::USER_ACTIVITY_VOLUME_UP_KEY_PRESS;
  37     default:
  38       return power_manager::USER_ACTIVITY_OTHER;
  39   }
  40 }
  41
  42 }  // namespace
  43
  44 UserActivityNotifier::UserActivityNotifier(::wm::UserActivityDetector* detector)
  45     : detector_(detector) {
  46   detector_->AddObserver(this);
  47 }
  48
  49 UserActivityNotifier::~UserActivityNotifier() {
  50   detector_->RemoveObserver(this);
  51 }
  52
  53 void UserActivityNotifier::OnUserActivity(const Event* event) {
  54   base::TimeTicks now = base::TimeTicks::Now();
  55   // InSeconds() truncates rather than rounding, so it's fine for this
  56   // comparison.
  57   if (last_notify_time_.is_null() ||
  58       (now - last_notify_time_).InSeconds() >= kNotifyIntervalSec) {
  59     chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
  60         NotifyUserActivity(GetUserActivityTypeForEvent(event));
  61     last_notify_time_ = now;
  62   }
  63 }
  64
  65 }  // namespace ui