[NTG-context] two issues with subcolumnsets (paralllel texts)

[NTG-context] two issues with subcolumnsets (paralllel texts)

[Pablo Rodriguez via ntg-context]

Dear Hans and Michael,

I’m finishing a small project of a booklet with some Greek text and its
facing Spanish translation.

Text is typeset in 30 pages (each language, 60 in total). Everything
went fine, many thanks for your excellent work.

There are two issues I’m experiencing and I don’t know what I’m doing wrong.

The first one is spacing before and after chapter headings, which I need
to set them up as:

  \setuphead[chapter, newchapter, title]
    [before={\blank[line]\testcolumn[5]},%2st
     after={\blank[none, samepage]},%.5st
    ]

Sorry, to get a line before and after, I would use `\blank[line]`. Why
is `none` needed in `after`?

If I have a line before and after chapter headings (instead of two, as
the comments show), I get two pages wrong flushed.

Sorry, but it is impossible to provide a MWE for me.

Columns and subcolums are so defined:

  \definecolumnset
    [parallel]
    [n=1,
     align={lesswidows,lessclubs,lessbroken,lessorphans}]

  \definesubcolumnset[parallel][L][1]
  \definesubcolumnset[parallel][R][2]

The flush mismatches are https://pdf.ousia.tk/first-mismatch.png and
https://pdf.ousia.tk/second-mismatch.png.

In both cases, original and translated text have the same number of
lines (after chapter title, four and six, respectively).

I wonder whether some widow issue for the Spanish text is moving the
title and whole paragraph to the next page in both cases.

Sorry for not giving an MWE, but I don’t understand why both mismatches
happen, what am I missing here?

Many thanks for your help,

Pablo
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[NTG-context] Re: two issues with subcolumnsets (paralllel texts)

[Pablo Rodriguez via ntg-context]

On 8/31/25 18:47, Pablo Rodriguez via ntg-context wrote:
> [...] 
> The flush mismatches are https://pdf.ousia.tk/first-mismatch.png and
> https://pdf.ousia.tk/second-mismatch.png.

Hi again,

I found that the problem is the value of `\testcolumn` in

    \setuphead[chapter, newchapter, title]
        [before={\blank[line]\testcolumn[5]}]

If I set it to 3, I avoid the flush mismatches, but I get some widows.

But what puzzles me is `\testcolumn[5]` being applied differently to
`\title` (the heading  for the right column and page) than to `\chapter`
(its counterpart for the left column and page),

I mean, as you can see, flush mismatches consist in chapter and two
lines on the left page and the whole chapter moved on the right page.

BTW, I was able to reproduce with _exactly the same text_ on left and
right columns. I wonder whether having a single subcolumnset per page
might be related.

If Ι’m missing something, some explanation will be really helpful.

Many thanks again,

Pablo
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[NTG-context] Re: two issues with subcolumnsets (paralllel texts)

[Pablo Rodriguez via ntg-context]

On 9/1/25 17:52, Pablo Rodriguez via ntg-context wrote:
> On 8/31/25 18:47, Pablo Rodriguez via ntg-context wrote:
>> [...] 
>> The flush mismatches are https://pdf.ousia.tk/first-mismatch.png and
>> https://pdf.ousia.tk/second-mismatch.png.
> [...]
> I found that the problem is the value of `\testcolumn` in
> 
>     \setuphead[chapter, newchapter, title]
>         [before={\blank[line]\testcolumn[5]}]
> 
> But what puzzles me is `\testcolumn[5]` being applied differently to
> `\title` (the heading  for the right column and page) than to `\chapter`
> (its counterpart for the left column and page),

Replying to myself again, I think I have found a workaround:

  \setuphead[chapter, title]
    [before={\ifmode{*newchapter} \blank[line]\testcolumn[5]
                \else
             \blank[line]\testcolumn[4]\fi}]

Of course, this was pure trial and error. Why the heading command on the
right page (title) requires one line less in `\testcolumn` than the
heading command in the left page (chapter) is totally unknown to me.

This also seems to work with sections with values 2-1 (which have margin
number as headings).

Both commands make widows disappear in my original project.

Just in case it would be helpful, I managed to generate a sample (from
my sources) which contain an XML file (for sources) and an environment
file with less than 30 relevant lines (and 50 previous lines to deal
with the XML source).

The sample is as small as possible (with the same ancient Greek text on
both streams) and it shows to flush mismatches. Values required to fix
this were 5-3.

In the sample, two widows appear, out of 8 pair of pages.

I’m reporting this, because I don’t really know whether the issue is in
my code or not.

Many thanks for your help,

Pablo
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