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// Copyright (c) 2012 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 "chrome/browser/chromeos/power/video_property_writer.h"
#include <ctime>
#include "ash/shell.h"
#include "ui/base/x/x11_util.h"
namespace {
// Minimum number of seconds between updates to the X property.
const int kUpdateIntervalSec = 5;
// Name of the X property on the root window. Also used as the property's type.
const char kPropertyName[] = "_CHROME_VIDEO_TIME";
} // namespace
namespace chromeos {
VideoPropertyWriter::VideoPropertyWriter() {
ash::Shell::GetInstance()->video_detector()->AddObserver(this);
}
VideoPropertyWriter::~VideoPropertyWriter() {
ash::Shell::GetInstance()->video_detector()->RemoveObserver(this);
}
void VideoPropertyWriter::OnVideoDetected() {
base::TimeTicks now = base::TimeTicks::Now();
if (last_update_time_.is_null() ||
(now - last_update_time_).InSecondsF() >= kUpdateIntervalSec) {
last_update_time_ = now;
if (!ui::SetIntProperty(
ui::GetX11RootWindow(),
kPropertyName,
kPropertyName,
time(NULL))) {
LOG(WARNING) << "Failed setting " << kPropertyName << " on root window";
}
}
}
} // namespace chromeos
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