Re: Spurious whitespace when exporting CJK text as epub

Hi!
Thanks a lot Hans and Mikael for the update!

On 4/21/2026 22:13 PM, Hans Hagen via ntg-context wrote:
> but ... Mikael and I wonder about applications and useability and can't
> come up with real examples.

Not sure whether it counts as a ‘real’ example, but I have several
documents reporting experimental results with ‘quick and dirty’ error
propagation/analysis. I started playing around with xinterval and it seems
to make at least part of it much easier.
(One alternative option is of course to to the analysis via a different
program and import the result in ConteXt; but from my experience doing as
much as possible from within ConTeXt helps a lot in ensuring the document
and data stay synchronized while keeping the pipeline simple.)

That's probably quite a niche use-case, but one where xinterval seems to be
genuinely helpful, so thanks again for adding it!

Cheers,
Florent

Le mar. 21 avr. 2026 à 22:13, Hans Hagen via ntg-context <[email protected]>
a écrit :

> On 4/20/2026 6:39 PM, Hans Hagen via ntg-context wrote:
> > On 4/19/2026 7:04 PM, gyuchen86--- via ntg-context wrote:
> >> Hello, I am trying to make use of the epub export functionality.
> >>
> >> I noticed that, unwanted whitespaces are inserted in the epub file in
> >> exact those locations where a linebreak occurs in the generated PDF
> >> file.
>
> You can check todays upload. We also switched to a new spacing model for
> cjk, using penalized glue so a bit more efficient. It should behave the
> same but made solving thsi space issue a bit easier.
>
> There is also some experimental stuff. We already have xmath (more math
> functions), xcomplex (complex numbers), xdecimal (high precision) and
> posit (floats that fit into so called halfwords). Out of curiosity, to
> this repertoire we added xinterval:
>
> \starttext
>
> \startluacode
>      local a = xinterval.new(123)
>      local b = xinterval.new(456)
>      context(a)
>      context.par()
>      context(b)
>      context.par()
>      context(a + b)
>      context.par()
>      context(a / b)
>      context.par()
>      context(xinterval.mid(xinterval.sqrt(a+b^2)))
>      context.par()
> \stopluacode
>
> \stoptext
>
> but ... Mikael and I wonder about applications and useability and can't
> come up with real examples.
>
> Hans
>
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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