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

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.

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

As expected, results are on the average worse than an occasional relatively short last line. One cannot expect to find good solutions when the solutionspace is too small. \startluacode function builders.paragraphs.constructors.methods.crap(head) local needed = 2 * tex.parindent if needed > 0 then local maximum = tex.hsize local cycles = 500 local step = 65536 local done = 0 local tail = node.tail(head) while true and done < cycles do local h = nodes.copy_list(head) local t = nodes.tail(h) local d, r = tex.linebreak(h) local l = node.tail(d) if d ~= l and l.subtype == nodes.listcodes.line then local natural = nodes.dimensions(l.list,t.prev) node.flush_list(d) if natural >= needed then break elseif natural >= maximum then break else local maybe = maximum - needed - done*step if maybe > 0 then tail.width = maybe tail.stretch = 0 tail.shrink = 0 done = done + 1 else break end end else node.flush_list(d) end end if done > 0 then logs.report("crap","last line enforced in %i steps",done) end end end \stopluacode \edef\ward {\cldloadfile{ward}} \defineparbuilder[crap] \starttext \dorecurse{20} { \dostepwiserecurse{0}{80}{2} { \indenting[##1mm,yes] \dontcomplain \setupalign[tolerant,stretch] \blackrule[width=\textwidth] \hsize=\dimexpr\textwidth-#1pt\relax \ward \par \startparbuilder[crap]% \ward \par \ward \par \stopparbuilder \page } } \stoptext ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------