Re: [NTG-context] Length range control of the last line of paragraph

[Hans Hagen]

On 3/22/2016 9:57 PM, Jan Tosovsky wrote:

On 2016-03-22 Hans Hagen wrote:

On 3/21/2016 8:14 PM, Jan Tosovsky wrote:

Dear All,

when paragraphs are separated by indenting the first line (instead of

an

empty line), these rules should be followed:

(1) the last line lenght is greater than the left indent
  
  
xx
  

(2) the last line is shorter than block width
  
  xx
xx
  



you need to keep in mind that what would work out well for one specific
case will not look nice in general as the last line filling is just one
of the aspects ... so, your last line + following first line might look
okay (according to whatever rules and criteria) but then, as you also
need to increase the tolerance and enable stretch to permit that
solution to be found, the rest might look like crap


I (naively) thought the last line can be somehow isolated in the engine so the 
parfillskip settings doesn't influence the rest (too much).


well, in order to determine what the last line is tex has to construct 
the paragraph so


x x 

becoming

x  x


would be real bad


I understand your point.


(ad 2) This can be done using \parfillskip XXpt plus 1fil (where
XX is required gap)


setting the XXpt is tricky as it might lead to underful or overful
cases when that amount start interfering with an optimal solution (as it's
seen as acceptable overflow in some direction)



underful or overful where? in previous lines? I am quite lost here :-)


\starttext

\setupalign[tolerant,stretch]
\dorecurse{100}{
\hsize\dimexpr\textwidth-#1pt\relax
\parfillskip -4em plus 1 fill
\input tufte
\page
}

\stoptext

page 43


it's hard to envision an interface, maybe some extra key in setupalign

\setupindenting[big] \indenting[yes]

\edef\ward{\cldloadfile{ward}}

\setupalign[verytolerant,stretch]

\dorecurse{100}{
  \hsize\dimexpr\textwidth-#1mm\relax
  \parfillskip \zeropoint plus 1fil\relax
  \ward  \par
  \parfillskip \zeropoint plus \dimexpr\availablehsize-
3\parindent\relax
  \ward  \par
  \startnarrower[left]
  \parfillskip \zeropoint plus 1fil\relax
  \ward \par
  \stopnarrower
  \startnarrower[left]
  \parfillskip \zeropoint plus
\dimexpr\availablehsize-3\parindent\relax
  \ward \par
  \stopnarrower
  \page
}


Wow, this is cool visualization!

When \zeropoint is replaced by e.g. 2em, I have what wanted originally.

Could anybody explain drawbacks of such approach? I mean especially that 
overful magic above. I'd like to summarize this topic on Wiki.

Jan

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Re: [NTG-context] Length range control of the last line of paragraph

[Jan Tosovsky]

On 2016-03-22 Hans Hagen wrote:
> On 3/21/2016 8:14 PM, Jan Tosovsky wrote:
> > Dear All,
> >
> > when paragraphs are separated by indenting the first line (instead of
> an
> > empty line), these rules should be followed:
> >
> > (1) the last line lenght is greater than the left indent
> >  
> >  
> >xx
> >  
> >
> > (2) the last line is shorter than block width
> >  
> >  xx
> >xx
> >  
> >
> 
> you need to keep in mind that what would work out well for one specific
> case will not look nice in general as the last line filling is just one
> of the aspects ... so, your last line + following first line might look
> okay (according to whatever rules and criteria) but then, as you also
> need to increase the tolerance and enable stretch to permit that
> solution to be found, the rest might look like crap

I (naively) thought the last line can be somehow isolated in the engine so the 
parfillskip settings doesn't influence the rest (too much). 

I understand your point.
 
> > (ad 2) This can be done using \parfillskip XXpt plus 1fil (where 
> > XX is required gap)
> 
> setting the XXpt is tricky as it might lead to underful or overful
> cases when that amount start interfering with an optimal solution (as it's
> seen as acceptable overflow in some direction)
> 

underful or overful where? in previous lines? I am quite lost here :-)

> it's hard to envision an interface, maybe some extra key in setupalign
> 
> \setupindenting[big] \indenting[yes]
> 
> \edef\ward{\cldloadfile{ward}}
> 
> \setupalign[verytolerant,stretch]
> 
> \dorecurse{100}{
>  \hsize\dimexpr\textwidth-#1mm\relax
>  \parfillskip \zeropoint plus 1fil\relax
>  \ward  \par
>  \parfillskip \zeropoint plus \dimexpr\availablehsize-
> 3\parindent\relax
>  \ward  \par
>  \startnarrower[left]
>  \parfillskip \zeropoint plus 1fil\relax
>  \ward \par
>  \stopnarrower
>  \startnarrower[left]
>  \parfillskip \zeropoint plus
> \dimexpr\availablehsize-3\parindent\relax
>  \ward \par
>  \stopnarrower
>  \page
> }

Wow, this is cool visualization!

When \zeropoint is replaced by e.g. 2em, I have what wanted originally.

Could anybody explain drawbacks of such approach? I mean especially that 
overful magic above. I'd like to summarize this topic on Wiki.

Jan

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Re: [NTG-context] Length range control of the last line of paragraph

[Hans Hagen]

On 3/22/2016 9:29 PM, Jan Tosovsky wrote:

Hi Michael,

On 2016-03-22 Rogers, Michael K wrote:


Perhaps this?  (I'm still better at Plain TeX than ConTeXt.)


\starttext
\setupindenting[yes,40pt]
\dimen0=\hsize
\advance\dimen0 by -\parindent
\advance\dimen0 by -2em
\parfillskip=2em plus \dimen0
\tolerance=0   % strictly enforces glue dimensions/stretching - may
have unwanted side effects

\dorecurse{41}{wxyz }\par
\dorecurse{42}{wxyz }\par
\dorecurse{26}{wxyz }



thanks, if I understand correctly, this follows my original idea to dynamically 
get the actual block width, simply substract indentation and use the variable 
for defining \parfillskip


i just added some variant to an existing setting, nothing too fancy, 
just a delta of local width and some indent



I modified it slightly, but it doesn't seem to have desired effect. The last 
line of third paragraph is still too short:


because there is more involved, like hyphenation, badness of other 
lines, etc ... after all it is stretch, not absolute


i'm not going to waste time too much on figuring out some heuristic that 
works in one case but not in the other



\starttext
\hsize 15.37cm
\input tufte

\parfillskip30pt plus 1fil
\input tufte

\dimen0\hsize
\advance\dimen0 by -60pt
\parfillskip=30pt plus \dimen0
%\tolerance=0   % strictly enforces glue dimensions/stretching - may have 
unwanted side effects


well, no stretch or tolerance means that the solution space becomes 
pretty small (so you might get your desired last line but a terrible n 
lines before that)


and hsize is not always the best choice

(normally all these par values also depends on the global body font, 
spacing, margins, etc. so it's more dynamic)



\input tufte

\parfillskip0pt plus 1fil

\input tufte

hsize is \the\hsize{}\par
dimen0 is \the\dimen0{}

\stoptext

I disabled that tolerance as it caused overflowing the text to the margin. Was 
that the key for the functionality?


what key?

try to add a minus or negative plus ... the outcome differes per case

Hans

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Re: [NTG-context] Length range control of the last line of paragraph

[Jan Tosovsky]

Hi Michael,

On 2016-03-22 Rogers, Michael K wrote:
>
> Perhaps this?  (I'm still better at Plain TeX than ConTeXt.)
> 
> 
> \starttext
> \setupindenting[yes,40pt]
> \dimen0=\hsize
> \advance\dimen0 by -\parindent
> \advance\dimen0 by -2em
> \parfillskip=2em plus \dimen0
> \tolerance=0   % strictly enforces glue dimensions/stretching - may
> have unwanted side effects
> 
> \dorecurse{41}{wxyz }\par
> \dorecurse{42}{wxyz }\par
> \dorecurse{26}{wxyz }
> 

thanks, if I understand correctly, this follows my original idea to dynamically 
get the actual block width, simply substract indentation and use the variable 
for defining \parfillskip

I modified it slightly, but it doesn't seem to have desired effect. The last 
line of third paragraph is still too short:

\starttext
\hsize 15.37cm
\input tufte

\parfillskip30pt plus 1fil
\input tufte

\dimen0\hsize
\advance\dimen0 by -60pt
\parfillskip=30pt plus \dimen0
%\tolerance=0   % strictly enforces glue dimensions/stretching - may have 
unwanted side effects

\input tufte

\parfillskip0pt plus 1fil

\input tufte 

hsize is \the\hsize{}\par
dimen0 is \the\dimen0{}

\stoptext

I disabled that tolerance as it caused overflowing the text to the margin. Was 
that the key for the functionality?

Jan

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Re: [NTG-context] Poster template

[MANUEL GONZALEZ SUAREZ]

Thanks, Hans


De: ntg-context  en nombre de Hans Hagen 

Enviado: martes, 22 de marzo de 2016 13:57
Para: ntg-context@ntg.nl
Asunto: Re: [NTG-context] Poster template

On 3/22/2016 10:09 AM, MANUEL GONZALEZ SUAREZ wrote:
> Hello friends
> I would like to know if there is a template to make posters in ConTeXt,
> as there are in LaTeX (beamerposter, a0poster, etc.)

\setuppapersize[A0] \setuplayout[page]

and then columnsets (i think Alan has done things like that) or layers
with positioning

Hans

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Re: [NTG-context] Protrusion cancellation by index term

[Hans Hagen]

On 3/21/2016 10:59 PM, Jan Tosovsky wrote:

On 2014-02-23 Hans Hagen wrote:

On 2/22/2014 2:38 PM, Jan Tosovsky wrote:

On 2014-02-22 Jan Tosovsky wrote:


when a punctuated phrase appears at the beginning of the line,
it is not protruded correctly when preceded by an index term.

... \index{foo}>Bar< ...

A minimal example is available at
http://drifted.in/other/sample.tex

I cannot place the space character between these two parts
(which helps) as I sometimes need to join this and the previous
phrase with the non-breaking space.



It is more serious issue than expected. Consider next two
variants:

(1) sentence, \index{primary}>Primary<
(2) sentence,\index{primary} >Primary<

When the line is broken after a comma:
ad 1) starting guillemet is not protruded
ad 2) ending comma is not protruded

When \index is surrounded by spaces from both sides, the space is
rendered at the beginning of the next line (resulting in
'indenting').

I'd be grateful for ignoring any non document content preceding
punctuation to avoid its influence on protrusion.


well, think of it like this:

[something][something else]

with [something] being bound to < ... so that is then the boundary of
the word, not < ... i might know a solution (but such -major- changes
have to fit into my schedule)


are there any improvements here with revamped token processing implemented
in recent versions?


it's not that trivial

- for the index we can cheat a bit but then i also need to check lots of 
other cases for possible interference


- for the footnote case there is no real solution as the heuristics of 
finding a protrusion character cannot be tricked too much without 
breaking it in other cases


but ... i think i can cook up something extra in the engine to drive the 
process; i'll play with it but again. it will take a lot of testing so 
it will then probably be an option for a while


Hans

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Re: [NTG-context] Poster template

[Hans Hagen]

On 3/22/2016 10:09 AM, MANUEL GONZALEZ SUAREZ wrote:

Hello friends
I would like to know if there is a template to make posters in ConTeXt,
as there are in LaTeX (beamerposter, a0poster, etc.)


\setuppapersize[A0] \setuplayout[page]

and then columnsets (i think Alan has done things like that) or layers 
with positioning


Hans

-
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  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
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Re: [NTG-context] Tagging and startitemize[columns]

[Hans Hagen]

On 3/22/2016 9:19 AM, Christoph Reller wrote:

\setuptagging[state=start]
\starttext

   \startsectionlevel[title=Chapter]
 Text.
 \startitemize[columns]
 \item A
 \item B
 \stopitemize

 \startitemize
 \item A
 \item B
 \stopitemize
 More Text.
   \stopsectionlevel
\stoptext



and what if you remove the % in line 847 in strc-itm.mkvi and remake the 
format?


   \strc_itemgroups_tag_start_group


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Re: [NTG-context] Length range control of the last line of paragraph

[Hans Hagen]

On 3/22/2016 11:54 AM, Hans Hagen wrote:

On 3/21/2016 8:14 PM, Jan Tosovsky wrote:

Dear All,

when paragraphs are separated by indenting the first line (instead of an
empty line), these rules should be followed:


a next beta will provide three new keywords (related to n times 
parindent filling, fwiw)


\starttext

\dontcomplain

\setupindenting[big] \indenting[yes]

\edef\ward{\cldloadfile{ward}}

\setupalign[verytolerant,stretch]

\dorecurse{100}{
\startnarrower[left] \setupalign[four]  4>\the\parfillskip \ward 
\par \stopnarrower
\startnarrower[left] \setupalign[three] 3>\the\parfillskip \ward 
\par \stopnarrower
\startnarrower[left] \setupalign[two]   2>\the\parfillskip \ward 
\par \stopnarrower

\page
}

\stoptext

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Re: [NTG-context] Length range control of the last line of paragraph

[Hans Hagen]

On 3/21/2016 8:14 PM, Jan Tosovsky wrote:

Dear All,

when paragraphs are separated by indenting the first line (instead of an
empty line), these rules should be followed:


a next beta will provide a bit more control over last words

\usemodule[art-01] \setupbodyfont[10pt]

\definehyphenationfeatures
  [words-1]
  [rightwords=3,
   lefthyphenmin=4,
   righthyphenmin=4]

\definehyphenationfeatures
  [words-2]
  [rightwords=3,
   rightchars=word,
   lefthyphenmin=4,
   righthyphenmin=4]

\definehyphenationfeatures
  [words-3]
  [rightwords=3,
   rightchars=8,
   lefthyphenmin=4,
   righthyphenmin=4]

\enabletrackers[hyphenator.visualize]

\setupalign[verytolerant,stretch]

\dontcomplain

\setuphyphenation
  [method=traditional]

\edef\tufte{\cldloadfile{tufte}}

\starttext

\dorecurse{100}{
\hsize\dimexpr\textwidth-#1mm\relax
\start \sethyphenationfeatures[words-1] \tufte \par
\hsize\dimexpr\textwidth-#1mm\relax
\start \sethyphenationfeatures[words-2] \tufte \par
\hsize\dimexpr\textwidth-#1mm\relax
\start \sethyphenationfeatures[words-3] \tufte \par
\page
}

\stoptext

not uploaded yet


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Re: [NTG-context] Length range control of the last line of paragraph

[Hans Hagen]

On 3/21/2016 8:14 PM, Jan Tosovsky wrote:

Dear All,

when paragraphs are separated by indenting the first line (instead of an
empty line), these rules should be followed:

(1) the last line lenght is greater than the left indent
 
 
   xx
 

(2) the last line is shorter than block width
 
 xx
   xx
 



you need to keep in mind that what would work out well for one specific 
case will not look nice in general as the last line filling is just one 
of the aspects ... so, your last line + following first line might look 
okay (according to whatever rules and criteria) but then, as you also 
need to increase the tolerance and enable stretch to permit that 
solution to be found, the rest might look like crap


it's the same for successive hyphenation and club/widow: any whole 
document setting that is done to get rid of one or two odd cases will 
often make the rest of the text look bad


this is a side effect of focusing on a specific typographical aspect 
whereby ignoring the rest combined with fully automated typesetting


of course one can have extensive discussions about how things should 
look right but one cannot ignore the text itself then: adding a few 
words or rephrasing is often a better way out


(the same applies to fonts: one can stress the virtues of some advanced 
kerning between two glyphs but at the same time be blind for the cases 
where it doesn't happen)



(ad 1) Some suggestions can be found in
http://tex.stackexchange.com/questions/28357/ensure-minimal-length-of-last-l
ine - but to be honest, it is not very clear to me how to apply it and even
combine with (2)

(ad 2) This can be done using \parfillskip XXpt plus 1fil (where XX is
required gap)


setting the XXpt is tricky as it might lead to underful or overful cases 
when that amount start interfering with an optimal solution (as it's 
seen as acceptable overflow in some direction)



I'd be grateful for any command which would set this globally for all
paragraphs. Partly requested here  http://tracker.luatex.org/view.php?id=885

One could set
(a) minimum length - default=2*indent
(b) minimum gap - default=indent
(c) minimum block width where (a) and (b) are still to be applied -
default=2*a+b


any heuristic that works for one case will make another worse (when 
applied to a whole document)



(ad c) if there are narrower blocks within the document (e.g. blockquotes),
we should still have some room for typesetting the last line content. If the
area width is insufficient, the last line would be typeset without these
(a+b) restrictions.

In meantime, any suggestion how to combine a+b manually are welcome.


it's hard to envision an interface, maybe some extra key in setupalign

\setupindenting[big] \indenting[yes]

\edef\ward{\cldloadfile{ward}}

\setupalign[verytolerant,stretch]

\dorecurse{100}{
\hsize\dimexpr\textwidth-#1mm\relax
\parfillskip \zeropoint plus 1fil\relax
\ward  \par
\parfillskip \zeropoint plus \dimexpr\availablehsize-3\parindent\relax
\ward  \par
\startnarrower[left]
\parfillskip \zeropoint plus 1fil\relax
\ward \par
\stopnarrower
\startnarrower[left]
\parfillskip \zeropoint plus 
\dimexpr\availablehsize-3\parindent\relax

\ward \par
\stopnarrower
\page
}

The 2*indent is not enough in most cases.

Actually, in context another mechanism can help:

\definehyphenationfeatures
  [words]
  [rightwords=3,
   lefthyphenmin=4,
   righthyphenmin=4]

\enabletrackers[hyphenator.visualize]

\setupalign[verytolerant,stretch]

\dontcomplain

\sethyphenationfeatures
  [words]

\setuphyphenation
  [method=traditional]

\dorecurse{100}{\hsize\dimexpr\textwidth-#1mm\relax \input tufte \page}

\stoptext

currently this doesn't discourage breaks between the last words but i'll 
add an option for that (chars or words in that case, that is the 
question) ... the reason for this mechanism is not so much the length 
but more the fact that one doesn't want an (even long) last word 
hyphenated.


Hans

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[NTG-context] Poster template

[MANUEL GONZALEZ SUAREZ]

Hello friends
I would like to know if there is a template to make posters in ConTeXt, as 
there are in LaTeX (beamerposter, a0poster, etc.)
Thanks very much
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[NTG-context] Tagging and startitemize[columns]

[Christoph Reller]

Hi,

Stil ConTeXt is the only TeX-based typesetting system that can produce
tagged PDF - this is a unique feature, thank you Hans!

I have, however, found that the following MWE produces wrongly nested
tagging information. Specifically:
- The itemization with columns (\startitemize[columns]) is not contained in
an "itemgroup"
- The second itemization (without columns) is tagged outside of the
"sectioncontent"
(Maybe the second issue is a consequence of the first.)

I am afraid but this might be a bug. Thank you for any feedback.

Cheers,
Christoph

MWE:

\setuptagging[state=start]
\starttext

  \startsectionlevel[title=Chapter]
Text.

\startitemize[columns]
\item A
\item B
\stopitemize

\startitemize
\item A
\item B
\stopitemize

More Text.
  \stopsectionlevel

\stoptext
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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