Mouse location throws NullPointerException

[Peter Zejda]

1. The version of Sikuli you were using.
  2.0.5
2. Your operating system, 32-bit or 64-bit, and its version.
  MS Windows 11, 64-bit
3. The procedure to reproduce the bug.
  Mouse.at().getPoint()
4. Any information that might help us to locate the bug.
  See below :-)

I'm using Jython with Sikulix, and am trying to get information about the Mouse location with a call such as this:

  mouse_off_scr = scr.getBounds().contains(Mouse.at().getPoint())

However, this frequently results in a NullPointerException being thrown within the Java library, and (now sure why) I can't even catch the error with a try/except BaseException. I did a bit of digging into the Java code, and found the culprit within the Device class method getLocation().

  public Location getLocation() {
    PointerInfo mp = MouseInfo.getPointerInfo();
    if (mp != null) {
      return new Location(MouseInfo.getPointerInfo().getLocation());
    } else {
      Debug.error("Mouse: not possible to get mouse position (PointerInfo == null)");
      return null;
    }
  }

It looks like there is some code in place to avoid the NPE. Even though it's checking for a null return value from MouseInfo.getPointerInfo(), the method gets called a second time and that's when the NPE occurs. I think the method should probably be corrected as follows:

  public Location getLocation() {
    PointerInfo mp = MouseInfo.getPointerInfo();
    if (mp != null) {
      return new Location(mp.getLocation());
    } else {
      Debug.error("Mouse: not possible to get mouse position (PointerInfo == null)");
      return null;
    }
  }

That may result is very slightly "outdated" mouse information, but at least it would avoid crashing the program. :-)