1 files changed, 103 insertions, 0 deletions
diff --git a/base/idle_timer.cc b/base/idle_timer.cc
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+++ b/base/idle_timer.cc
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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;
+}