RFR: JDK-8314215 Trailing Spaces before Line Breaks Affect the Center Alignment of Text

[Andy Goryachev]

On Thu, 25 Jan 2024 23:23:42 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

>> Regarding other whitespace characters.
>> Using \u2003 em space, pasting the following text
>> 
>> AAA    BBB    CCC    
>> 
>> 
>> the results as seen with MS Word 16.78 (23100802) on macOS 14.2.1 indicate that it treats em space as whitespace:
>> 
>> ![Screenshot 2024-01-25 at 08 14 13](https://github.com/openjdk/jfx/assets/107069028/0e4e27ea-eb5e-4b9e-9d7b-935326ac1145)
>> ![Screenshot 2024-01-25 at 08 14 22](https://github.com/openjdk/jfx/assets/107069028/b7a5c792-a6e6-4e10-a3cf-d92b87768f9f)
>
>> Regarding other whitespace characters. Using \u2003 em space, pasting the following text
> 
> I think we can use `Character.isWhitespace`. For the most part it aligns with "is this a breaking space".  It's not perfect, but we can do more when there are complaints.  Here's my test:
> 
> 
> char     isWhiteSpace (breaking space)?
> \u0009   true
> \u0020   true
> \u00a0   false
> \u1680   true
> \u180e   false <- unexpected
> \u2001   true
> \u2002   true
> \u2003   true
> \u2004   true
> \u2005   true
> \u2006   true
> \u2007   false
> \u2008   true
> \u2009   true
> \u200a   true
> \u200b   false <- unexpected
> \u200c   false <- unexpected
> \u200d   false <- unexpected
> \u202f   false
> \u205f   true
> \u3000   true

thank you @hjohn !  this PR has been out for a while, could you sync it up with the master please?

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PR Comment: https://git.openjdk.org/jfx/pull/1236#issuecomment-1911176710