Idle timeout

[Lankaster]

Add idle check:
Example: link to stackoverflow

• On Windows, GetLastInputInfo, see this answer

• On OS X, NSWorkspaceWillSleepNotification and NSWorkspaceDidWakeNotification, see this answer

• On X11, it is the screensaver API:

    /* gcc -o getIdleTime getIdleTime.c -lXss */
    #include <X11/extensions/scrnsaver.h>
    #include <stdio.h>

    int main(void) {
      Display *dpy = XOpenDisplay(NULL);

      if (!dpy) {
        return(1);
      }

      XScreenSaverInfo *info = XScreenSaverAllocInfo();
      XScreenSaverQueryInfo(dpy, DefaultRootWindow(dpy), info);
      printf("%u", info->idle);

      return(0);
    }