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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 1.1 (the "License"); you may not use this file except in compliance with
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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 * The Original Code is the Mozilla OS/2 widget code.
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 * The Initial Developer of the Original Code is
 * Peter Weilbacher <mozilla@Weilbacher.org>.
 * Portions created by the Initial Developer are Copyright (C) 2008
 * the Initial Developer. All Rights Reserved.
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#include "nsIdleServiceOS2.h"

// prototype for funtion imported from DSSaver
static int (*_System DSSaver_GetInactivityTime)(ULONG *, ULONG *);
#define SSCORE_NOERROR 0 // as in the DSSaver header files

NS_IMPL_ISUPPORTS2(nsIdleServiceOS2, nsIIdleService, nsIdleService)

nsIdleServiceOS2::nsIdleServiceOS2()
  : mHMod(NULLHANDLE), mInitialized(false)
{
  const char error[256] = "";
  if (DosLoadModule(error, 256, "SSCORE", &mHMod) == NO_ERROR) {
    if (DosQueryProcAddr(mHMod, 0, "SSCore_GetInactivityTime",
                         (PFN*)&DSSaver_GetInactivityTime) == NO_ERROR) {
      mInitialized = true;
    }
  }
}

nsIdleServiceOS2::~nsIdleServiceOS2()
{
  if (mHMod != NULLHANDLE) {
    DosFreeModule(mHMod);
  }
}

bool
nsIdleServiceOS2::PollIdleTime(PRUint32 *aIdleTime)
{
  if (!mInitialized)
    return false;

  ULONG mouse, keyboard;
  if (DSSaver_GetInactivityTime(&mouse, &keyboard) != SSCORE_NOERROR) {
    return false;
  }

  // we are only interested in activity in general, so take the minimum
  // of both timers
  *aIdleTime = NS_MIN(mouse, keyboard);
  return true;
}

bool
nsIdleServiceOS2::UsePollMode()
{
  return mInitialized;
}