Re: [NTG-context] Progressively encouraging page/column breaks at \blank with penalties
That works for my purposes; thank you for letting me know about it!
Joey
On Sun, Aug 15, 2021 at 1:53 AM Aditya Mahajan via ntg-context <
ntg-context@ntg.nl> wrote:
> On Sun, 15 Aug 2021, Joey McCollum via ntg-context wrote:
>
> > Hi,
> >
> > I'm trying to implement a section break marker in a grid layout. At a
> > section break, two lines of space should separate the subsequent segments
> > of text (just plain paragraphs, in this case), and a symbol (in the
> example
> > below, "X") should be set in the middle of these two lines. For my
> > purposes, the section break symbol should never occur at the top of a
> page
> > or column, and it is more desirable to have a page or column end with the
> > section break symbol than to have a single orphaned line follow the
> symbol
> > at the end of the page or column. Based on these constraints, I thought
> > that using the "samepage" and "preference" options for the first and
> second
> > line breaks would work nicely:
> >
> > ```
> > \define\SectionBreak{%
> > \blank[halfline, samepage]% non-breaking to ensure that no column
> > begins with the section break symbol
> > \startalignment[middle]%
> > {X}% section break symbol
> > \stopalignment%
> > \blank[halfline, preference]% this can (and, if possible, should) be
> > broken across a column
> > ```
> >
> > This does successfully prevent the placement of the symbol at the top of
> a
> > page/column, but it doesn't encourage the placement of the symbol at the
> > end of a page/column as often as I would like.
>
> Depending on what you want, you can try adding \testpage[n] (where n is a
> number). This checks if the remainder of the page has enough space for n
> lines; if not, then it issues a page-break.
>
> Aditya
>
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Re: [NTG-context] Progressively encouraging page/column breaks at \blank with penalties
On Sun, 15 Aug 2021, Joey McCollum via ntg-context wrote:
> Hi,
>
> I'm trying to implement a section break marker in a grid layout. At a
> section break, two lines of space should separate the subsequent segments
> of text (just plain paragraphs, in this case), and a symbol (in the example
> below, "X") should be set in the middle of these two lines. For my
> purposes, the section break symbol should never occur at the top of a page
> or column, and it is more desirable to have a page or column end with the
> section break symbol than to have a single orphaned line follow the symbol
> at the end of the page or column. Based on these constraints, I thought
> that using the "samepage" and "preference" options for the first and second
> line breaks would work nicely:
>
> ```
> \define\SectionBreak{%
> \blank[halfline, samepage]% non-breaking to ensure that no column
> begins with the section break symbol
> \startalignment[middle]%
> {X}% section break symbol
> \stopalignment%
> \blank[halfline, preference]% this can (and, if possible, should) be
> broken across a column
> ```
>
> This does successfully prevent the placement of the symbol at the top of a
> page/column, but it doesn't encourage the placement of the symbol at the
> end of a page/column as often as I would like.
Depending on what you want, you can try adding \testpage[n] (where n is a
number). This checks if the remainder of the page has enough space for n lines;
if not, then it issues a page-break.
Aditya
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[NTG-context] Progressively encouraging page/column breaks at \blank with penalties
Hi,
I'm trying to implement a section break marker in a grid layout. At a
section break, two lines of space should separate the subsequent segments
of text (just plain paragraphs, in this case), and a symbol (in the example
below, "X") should be set in the middle of these two lines. For my
purposes, the section break symbol should never occur at the top of a page
or column, and it is more desirable to have a page or column end with the
section break symbol than to have a single orphaned line follow the symbol
at the end of the page or column. Based on these constraints, I thought
that using the "samepage" and "preference" options for the first and second
line breaks would work nicely:
```
\define\SectionBreak{%
\blank[halfline, samepage]% non-breaking to ensure that no column
begins with the section break symbol
\startalignment[middle]%
{X}% section break symbol
\stopalignment%
\blank[halfline, preference]% this can (and, if possible, should) be
broken across a column
```
This does successfully prevent the placement of the symbol at the top of a
page/column, but it doesn't encourage the placement of the symbol at the
end of a page/column as often as I would like. I tried replacing the
"preference" option with options with better negative penalties, like
"penalty:-1000", "penalty:-2000", and even "penalty:-5000", but these
didn't make any difference. The option "penalty:-1" trivially works,
but it forces a page/column break at every section break marker, which is
far too extreme.
Is this normal behavior? I would have thought that progressively more
negative penalties would gradually encourage page/column breaks, but this
doesn't seem to happen. In the following MWE, the "preference" and
"penalty" options (apart from "penalty:-1") for the second line break
don't change the total page count or appearance of the final page at all
(which would be expected in a document of this size):
```
\setuplayout[
grid=yes %enable baseline grid
]
\setupinterlinespace[18bp] % text line spacing
%Define macro for section break:
\define\SectionBreak{%
\blank[halfline, samepage]%non-breaking to ensure that no column begins
with the section break symbol
\startalignment[middle]%
{X}% section break symbol
\stopalignment%
\blank[halfline]% a column break here is neither encouraged nor discouraged
% \blank[halfline, preference]% this should encourage a column break here,
but it doesn't seem to make a difference
% \blank[halfline, penalty:-1000]% still no difference
% \blank[halfline, penalty:-2000]% still no difference
% \blank[halfline, penalty:-5000]% still no difference
% \blank[halfline, penalty:-1]% this works, but it is too extreme!
}
%Set things up for fakewords:
\usemodule[visual]
\setupsystem[random=10]
\starttext
\dorecurse{400}{\fakewords{20}{100}\SectionBreak}
\stoptext
```
As always, any help is appreciated!
Joey
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