#include <stdlib.h>

#include <X11/Xlib.h>
#include <X11/extensions/scrnsaver.h>

/* Get the idle time from the X Screen Saver extionsion.
 *
 * Returns:
 * long: Idle time in milliseconds
 */
Display *xorgDisplay;
XScreenSaverInfo *xorgScreensaverInfo;

unsigned long getIdleTime(void) {
  unsigned long idle = 0;
  if (NULL == xorgDisplay) {
    xorgDisplay = XOpenDisplay(NULL);
  }

  if (!xorgDisplay) {
    return idle;
  }

  if (NULL == xorgScreensaverInfo) {
    xorgScreensaverInfo = XScreenSaverAllocInfo();
  }
  XScreenSaverQueryInfo(xorgDisplay, DefaultRootWindow(xorgDisplay), xorgScreensaverInfo);

  idle = xorgScreensaverInfo->idle;

  return idle;
}