On Mon, 27 Mar 2023 15:07:52 GMT, Kevin Rushforth <k...@openjdk.org> wrote:

>> The class `PseudoClassState` is private API, but was exposed erroneously in 
>> the CSS API. Instead, `Set<PseudoClass>` should have been used. This PR 
>> corrects this.
>
> This was clearly a mistake back when the public API was first created in JDK 
> 9.

@kevinrushforth I've created the CSR for this.  Can I move it to proposed?

Also, I've been looking into https://bugs.openjdk.org/browse/JDK-8199216 which 
sees excessive use of `PseudoClassState` instances (and I see this even under 
more "normal" circumstances as well).  I've got a fix for this issue which 
involves making use of an immutable variant of `PseudoClassState` (as almost 
99% of all the instances are never mutated, but must be copied just in case 
they are). 

This change would need to go in first though to make this possible.

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PR Comment: https://git.openjdk.org/jfx/pull/1070#issuecomment-1490030627

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