/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Idle Service for OSSO.
 *
 * The Initial Developer of the Original Code is Mozilla Corporation
 * Portions created by the Initial Developer are Copyright (C) 2008
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Doug Turner <dougt@meer.net>  (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsIdleServiceOSSO.h"
#include "nsIObserverService.h"
#include "nsServiceManagerUtils.h"
#include "prtime.h"

#include <gtk/gtk.h>

NS_IMPL_ISUPPORTS2(nsIdleServiceOSSO, nsIIdleService, nsIObserver)

nsIdleServiceOSSO::nsIdleServiceOSSO()
 : mIdle(PR_FALSE)
{
  nsCOMPtr<nsIObserverService> obsServ = do_GetService("@mozilla.org/observer-service;1");
  obsServ->AddObserver(this, "system-display-on", PR_FALSE);
  obsServ->AddObserver(this, "system-display-dimmed-or-off", PR_FALSE);
}

nsIdleServiceOSSO::~nsIdleServiceOSSO()
{
}

NS_IMETHODIMP
nsIdleServiceOSSO::GetIdleTime(PRUint32 *aTimeDiff)
{ 
  if (mIdle) {
    *aTimeDiff = ( PR_Now() - mIdleSince ) / PR_USEC_PER_MSEC;
    return NS_OK;
  }

  *aTimeDiff = 0;
  return NS_OK;
}

NS_IMETHODIMP
nsIdleServiceOSSO::Observe(nsISupports *aSubject, const char *aTopic, const PRUnichar *aData)
{
  if (!strcmp(aTopic, "system-display-dimmed-or-off") && mIdle == PR_FALSE) {
    mIdle = PR_TRUE;
    mIdleSince = PR_Now();
  }
  else if (!strcmp(aTopic, "system-display-on")) {
    mIdle = PR_FALSE;
  }

  return NS_OK;
}
