RFR: 8296266: TextArea: Navigation breaks with RTL text

[Andy Goryachev]

On Tue, 22 Aug 2023 20:46:21 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

> The fix uses character BreakIterator instead of the logic that relies on caretBounds/hitTest/rangeShape in TextInputControl.nextCharacterVisually().
> 
> I believe this is a more reliable method of navigation, as it behaves in sync with the jdk break iterator, thought it might work differently around grapheme clusters, considering a recent change JDK-8291660
> 
> This change also introduces TextInputControlHelper class (impl. detail) which gives access to character- and word- break iterators cached by TextInputControl (*some say* these iterators and associated editing logic should be a part of Content implementation, but that's a discussion for another day).

@prrace can you please take a look?

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PR Comment: https://git.openjdk.org/jfx/pull/1220#issuecomment-1747794422