| // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <windows.h> |
| |
| #include "base/idle_timer.h" |
| |
| #include "base/message_loop.h" |
| #include "base/time.h" |
| |
| IdleTimerTask::IdleTimerTask(TimeDelta idle_time, bool repeat) |
| : idle_interval_(idle_time), |
| repeat_(repeat), |
| get_last_input_info_fn_(GetLastInputInfo) { |
| } |
| |
| IdleTimerTask::~IdleTimerTask() { |
| Stop(); |
| } |
| |
| void IdleTimerTask::Start() { |
| DCHECK(!timer_.get()); |
| StartTimer(); |
| } |
| |
| void IdleTimerTask::Stop() { |
| timer_.reset(); |
| } |
| |
| void IdleTimerTask::Run() { |
| // Verify we can fire the idle timer. |
| if (TimeUntilIdle().InMilliseconds() <= 0) { |
| OnIdle(); |
| last_time_fired_ = Time::Now(); |
| } |
| Stop(); |
| StartTimer(); // Restart the timer for next run. |
| } |
| |
| void IdleTimerTask::StartTimer() { |
| DCHECK(timer_ == NULL); |
| TimeDelta delay = TimeUntilIdle(); |
| if (delay.InMilliseconds() < 0) |
| delay = TimeDelta(); |
| timer_.reset(new OneShotTimer(delay)); |
| timer_->set_unowned_task(this); |
| timer_->Start(); |
| } |
| |
| TimeDelta IdleTimerTask::CurrentIdleTime() { |
| // TODO(mbelshe): This is windows-specific code. |
| LASTINPUTINFO info; |
| info.cbSize = sizeof(info); |
| if (get_last_input_info_fn_(&info)) { |
| // Note: GetLastInputInfo returns a 32bit value which rolls over ~49days. |
| int32 last_input_time = info.dwTime; |
| int32 current_time = GetTickCount(); |
| int32 interval = current_time - last_input_time; |
| // Interval will go negative if we've been idle for 2GB of ticks. |
| if (interval < 0) |
| interval = -interval; |
| return TimeDelta::FromMilliseconds(interval); |
| } |
| NOTREACHED(); |
| return TimeDelta::FromMilliseconds(0); |
| } |
| |
| TimeDelta IdleTimerTask::TimeUntilIdle() { |
| TimeDelta time_since_last_fire = Time::Now() - last_time_fired_; |
| TimeDelta current_idle_time = CurrentIdleTime(); |
| if (current_idle_time > time_since_last_fire) { |
| if (repeat_) |
| return idle_interval_ - time_since_last_fire; |
| return idle_interval_; |
| } |
| return idle_interval_ - current_idle_time; |
| } |
| |