RFR: 8311922: [macOS] right-Option key fails to generate release event

[Damon Nguyen]

On Fri, 25 Aug 2023 22:18:42 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

> @DamonGuy Tested with the patch. Observed that the key code and extended modifier differ for left vs right option key. This is not the case for other left/right modifier keys such as Shift, Command. I think some extra flags (key masks) are being set in case of **Right Option Key**.
> 
> ```
> LEFT SHIFT KEY
> -----------------
> KEY PRESSED: 
>  key code = 16 (⇧)
>  extended modifiers = 64 (⇧)
>  action key? NO
>  key location: left
> KEY RELEASED: 
>  key code = 16 (⇧)
>  extended modifiers = 0 (no extended modifiers)
>  action key? NO
>  key location: left
> 
> RIGHT SHIFT KEY
> -----------------
> KEY PRESSED: 
>  key code = 16 (⇧)
>  extended modifiers = 64 (⇧)
>  action key? NO
>  key location: right
> KEY RELEASED: 
>  key code = 16 (⇧)
>  extended modifiers = 0 (no extended modifiers)
>  action key? NO
>  key location: right
> 
> ------------------------------------------------------------------
> 
> LEFT OPTION KEY
> ------------------
> KEY PRESSED: 
>  key code = 18 (⌥)
>  extended modifiers = 512 (⌥)
>  action key? NO
>  key location: left
> KEY RELEASED: 
>  key code = 18 (⌥)
>  extended modifiers = 0 (no extended modifiers)
>  action key? NO
>  key location: left
> 
> RIGHT OPTION KEY
> -------------------
> KEY PRESSED: 
>  key code = 65406 (⌥)
>  extended modifiers = 8704 (⌥+⌥)
>  action key? NO
>  key location: right
> KEY RELEASED: 
>  key code = 65406 (⌥)
>  extended modifiers = 0 (no extended modifiers)
>  action key? NO
>  key location: right
> ```

Thanks for catching this. I believe the edit I just pushed fixes this. My test now shows the correct key code and location on my end.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/15432#issuecomment-1696425021