On 3/25/2016 2:40 PM, Jan Tosovsky wrote:
On 2016-03-24 Hans Hagen wrote:
On 3/24/2016 8:36 PM, Jan Tosovsky wrote:

We basically need:
<text><glue min-width='XX' max-width='hsize-3*indent'>

and I thought this is exactly what \parfillskip ensures
\parfillskip XX plus (hsize - 3*indent)


the fil is taken into account when calculating the best break points
and then the XX is fixed but plus/minus can lead to if being less
or more, all relative to other fill (distributed)

so, XX plus (hsize - 3*indent) is not a fixed value, it's XX or more

take this:

\ruledhbox to 10cm {x\hskip0pt plus 1cm x}

the skip will stretch more than 1cm

I can see.

But sorry for my ignorance, as far as I understand, \parfillskip is added to 
the end of the paragraph, so we have rather
\ruledhbox to 10cm {x\hskip0pt plus 1cm} % without that 'x' at the end, so no 
'glue' distribution is performed

there is but not enough stretch so there will be a warning ... you can see it from

\ruledhbox to 10cm {x}
\ruledhbox to 10cm {x\hskip0pt plus 1cm}
\ruledhbox to 10cm {x\hskip0pt plus 1fill}


If '\parfillskip 2em plus (hsize - 3*(2em) - 2em)' is specified, I still think 
we should get space of width at least 2em '####' which can be extended as 
indicated by hyphens '-' here:

emememememememememememememememememememem
emememememem------------------------####

So there are two last line lengths extrems:
(shortest)
emememememememememememememememememememem
emememememem

(longest)
emememememememememememememememememememem
emememememememememememememememememem

I slightly modified your example and even with verystrict settings all seems to 
be fine (except too narrow blocks, which is not my use case).

\showmakeup[glue]

\setupindenting[yes,2em]

\edef\ward{\cldloadfile{ward}}

\setupalign[verystrict,hz]

\starttext
\dorecurse{100}{
      \hsize\dimexpr\textwidth-#1mm\relax
      \dimen0=\hsize
      \advance\dimen0 by -8em % 3*em - 2em
      \parfillskip 2em plus \dimen0\relax
      \ward  \par
      \parfillskip 2em plus \dimen0\relax
      \ward  \par
      \startnarrower[left]
          \parfillskip 2em plus \dimen0\relax
          \ward \par
      \stopnarrower
      \startnarrower[left]
          \parfillskip 2em plus \dimen0\relax
          \ward \par
      \stopnarrower
      \page
}
\stoptext

The problem here this settings cannot be done globally if there are various 
block widths.

you always add a 2em skip so there will never be a word touching the right margin in the last line; furthermore you permit some stretch, but as said before this stretch is not frozen, it's a ratio relative to other stretch

\ruledhbox to 10cm {x\hskip2em plus 1cm x\hskip2em plus 1cm x}

so, the plus 1cm can become more than that depending on needs (onlky the warning is influenced

Can I somehow define command globally which takes local block widths?

\parfillskip #1 plus \localhsize-#1-#2, where
#1 gap width
#2 shortest line width

\availablehsize

i think that the #1 gap is irrelevant and actually makes it worse as it add space while you actually want it to move the other direction

anyway, this is why using a couple of non-hyphenated words or a minimum amount of characters makes more sense

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                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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