inter-word spacing

inter-word spacing

[Jano Kula]

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Hello,

trying to reproduce the hand-printed original as close as possible I'm
using \setupcharacterkerning. I can match character kerning, but inter-word
spaces are different. What is the right option, command or feature to
change it for current font and/or in the font definition? I haven't found
any.

MWE
% macros=mkiv
\setupcharacterkerning[large][factor=0.1]
\setcharacterkerning[large]
\starttext
\input knuth
\stoptext

Thank you,
Jano

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Re: inter-word spacing

[jbf]

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Hi Jano,

Seems to me that there are a few options and you might need more than 
one of them, depending on the font/typefaces you are using (which 
obviously influences things):

1. One factor will be whether you are using \definefontfeature 
[default][default]  [expansion=quality,protrusion=quality], which you 
obviously then need to call in with \setupalign. 
https://wiki.contextgarden.net/Command/setupalign

2. Another factor will be \setupspacing 
https://wiki.contextgarden.net/Command/setupspacing

3. A third factor might be the need to tweak things a bit once you take 
a look at what is produced, and where you might need to use a couple of 
other options, be it \, \nospace, \thinspace....

For example, I have found that for a particular project I am working on 
at the moment, my best setup does not include protrusion, but I use

\setupalign
[hz,nothyphenated,verytolerant,stretched], and

\setuplanguage[en][spacing=packed].

This latter especially because I want to avoid some rather ugly spaces 
after a period. Then once I see how things look, I apply 
{\kerncharacters[-0.025] my text} in particular instances where things 
need to be tidied up. I have found that -0.025 works well in my situation.

Not at all sure if all the above is what the purists would do, but from 
a practical point of view it works for me. Hope it helps.

Julian

On 21/10/20 1:12 am, Jano Kula wrote:

> Hello,
>
> trying to reproduce the hand-printed original as close as possible I'm 
> using \setupcharacterkerning. I can match character kerning, but 
> inter-word spaces are different. What is the right option, command or 
> feature to change it for current font and/or in the font definition? I 
> haven't found any.
>
> MWE
> % macros=mkiv
> \setupcharacterkerning[large][factor=0.1]
> \setcharacterkerning[large]
> \starttext
> \input knuth
> \stoptext
>
> Thank you,
> Jano
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
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> wiki     : http://contextgarden.net
> ___________________________________________________________________________________

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Re: inter-word spacing

[Jano Kula]

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Hello Julian!

Thank you for your hints.

On Thu, 22 Oct 2020 at 11:48, jbf <roma83537@gmail.com> wrote:

> 1. One factor will be whether you are using \definefontfeature
> [default][default]  [expansion=quality,protrusion=quality], which you
> obviously then need to call in with \setupalign.
> https://wiki.contextgarden.net/Command/setupalign
>
This doesn't influence the dimension of space. Well, it does, but it is a
side effect of alignment and line breaking algorithm. One cannot change the
space to a particular value/factor.

2. Another factor will be \setupspacing
> https://wiki.contextgarden.net/Command/setupspacing
>
This would work if the parameter could be *dimension* (\setupspacing[5pt]),
but it cannot.


> 3. A third factor might be the need to tweak things a bit once you take a
> look at what is produced, and where you might need to use a couple of other
> options, be it \, \nospace, \thinspace....
>
If one will finetune every space in the paragraph, this could be a way, but
it's far from a nice solution.

\setuplanguage[en][spacing=packed].
>
> This latter especially because I want to avoid some rather ugly spaces
> after a period.
>
Which is an equivalent of \frenchspacing primitive (only regular space
after period). In most languages spacing=packed is likely the default
setting.

Not at all sure if all the above is what the purists would do, but from a
> practical point of view it works for me.
>
Purists wouldn't change kerning at all, because the font designer knows
best, what kerning should be used. Anyway, once the graphic designer starts
changing leterspacing (kerning), the space correction is sometimes needed,
too. ConTeXt changes the space proportionally to \setupcharacterkerning,
which is fine in most cases.

For this use case (short text in one font) primitive \spaceskip3.2pt will
do the job (ragged text thus no glue). I was searching for the more
abstract solution like \setupspacing[factor=1.05], because once in a while
the correction is needed. Or font goodies could be the way to change
spacing.

Regards,
Jano

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