RFR: 8345538: Robot.mouseMove doesn't clamp bounds on macOS when trying to move mouse off screen [v3]

[Alexey Ivanov]

On Fri, 20 Dec 2024 19:22:35 GMT, Alisen Chung <achung at openjdk.org> wrote:

>> @aivanov-jdk 
>> I see your point. But I'm running into NPE at `MouseInfo.getPointerInfo().getLocation()` without the fix as well (dual monitor, extended display setup)
>> 
>> Is it expected of MouseInfo.getPointerInfo() to return null for off-screen coordinates (meaning does it consider it as mouse not available if it is outside the screen devices)?
>> 
>> PointerInfo has two things associated with it - screen device and a location, so if it is not able to associate the coordinate with any of the screen device (off-screen coordinate) is it suppose to return null in this case?
>
> Interesting. Does this also happen after the fix with Robot clamping coordinates in shared code?

@alisenchung @honkar-jdk @prrace Things align: if the main monitor is on the right, and the secondary monitor is to the left of the main one, `Robot.mouseMove(20_000, 200)`, the following call to `MouseInfo.getPointerInfo()` returns `null`.

Both Harshitha and I see `null` in such a configuration both with and without the fix… on Windows and Mac.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22781#discussion_r1894405687