chrome/browser/chromeos/idle_detector.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 "chrome/browser/chromeos/idle_detector.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "ui/base/user_activity/user_activity_detector.h"
  10
  11 namespace chromeos {
  12
  13 IdleDetector::IdleDetector(const base::Closure& on_idle_callback)
  14     : idle_callback_(on_idle_callback) {}
  15
  16 IdleDetector::~IdleDetector() {
  17   ui::UserActivityDetector* user_activity_detector =
  18       ui::UserActivityDetector::Get();
  19   if (user_activity_detector && user_activity_detector->HasObserver(this))
  20     user_activity_detector->RemoveObserver(this);
  21 }
  22
  23 void IdleDetector::OnUserActivity(const ui::Event* event) {
  24   ResetTimer();
  25 }
  26
  27 void IdleDetector::Start(const base::TimeDelta& timeout) {
  28   timeout_ = timeout;
  29   if (!ui::UserActivityDetector::Get()->HasObserver(this))
  30     ui::UserActivityDetector::Get()->AddObserver(this);
  31   ResetTimer();
  32 }
  33
  34 void IdleDetector::ResetTimer() {
  35   if (timer_.IsRunning())
  36     timer_.Reset();
  37   else
  38     timer_.Start(FROM_HERE, timeout_, idle_callback_);
  39 }
  40
  41 }  // namespace chromeos