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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#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;
}
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