page ends with a section title followed by a table

page ends with a section title followed by a table

[Sylvain Hubert]

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Dear List,

In the following example, the section title appears at the very end of the
first page.

    \showframe

    \starttext
    \dorecurse{94}{a b c }\\
    \dorecurse{94}{a b c }\\
    \dorecurse{94}{a b c }\\
    \dorecurse{94}{a b c }\\
    \dorecurse{94}{a b c }\\
    \dorecurse{30}{a b c }

    \section{title}
    \startxtable
    \startxrow
    \startxcell[ny=10]a\stopxcell\startxcell 1\stopxcell
    \stopxrow
    \dorecurse{9}{\startxrow\startxcell 2\stopxcell\stopxrow}
    \stopxtable
    \stoptext

Does anyone know where to adjust the penalty in this case, so that the
section title can be repositioned to the next page?

Thanks!

Best,
Sylvain

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Re: page ends with a section title followed by a table

[Pablo Rodriguez]

On 11/10/20 9:55 AM, Sylvain Hubert wrote:
> Dear List,
>
> In the following example, the section title appears at the very end of
> the first page.
> [...]
> Does anyone know where to adjust the penalty in this case, so that the
> section title can be repositioned to the next page?

Hi Sylvain,

  \setuphead[title]
    [before={\blank[preference, big],
     after={\blank[samepage, big]]

In this case, the blank space before sets a preference for inserting a
page break. The blank space after requires to be in the same page with
next paragraph.

Of course, you don’t need both simultaneously.

Just in case it helps,

Pablo
--
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Re: page ends with a section title followed by a table

[Sylvain Hubert]

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On Tue, 10 Nov 2020 at 16:00, Pablo Rodriguez <oinos@gmx.es> wrote:

> On 11/10/20 9:55 AM, Sylvain Hubert wrote:
> > Dear List,
> >
> > In the following example, the section title appears at the very end of
> > the first page.
> > [...]
> > Does anyone know where to adjust the penalty in this case, so that the
> > section title can be repositioned to the next page?
>
> Hi Sylvain,
>
>   \setuphead[title]
>     [before={\blank[preference, big],
>      after={\blank[samepage, big]]
>
> In this case, the blank space before sets a preference for inserting a
> page break. The blank space after requires to be in the same page with
> next paragraph.
>
> Of course, you don’t need both simultaneously.
>
> Just in case it helps,
>
> Pablo
>

Hello Pablo,

Thank you very much for the help. The penalty of \blank indeed brings the
solution closer and it does format the previous example correctly.

However, when I went back to the original document, neither
[before={\blank[preference, big]}] nor [after={\blank[samepage, big]}] nor
both worked. I trimmed it into the following example which behaves the same:

    \starttext
    \showframe
    \dorecurse{50}{a }
    \startsection[title=spec][before={\blank[preference,big]},
after={\blank[samepage,big]}]
    \startxtable
    \startxrow
    \startxcell[ny=30]a\stopxcell\startxcell 1\stopxcell
    \stopxrow
    \dorecurse{29}{\startxrow\startxcell 2\stopxcell\stopxrow}
    \stopxtable
    \stoptext

Do you have an idea on how this could also be formatted correctly or how
one could inspect and debug the penalty?

Thanks again!

Sylvain

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___________________________________________________________________________________

Re: page ends with a section title followed by a table

[Sylvain Hubert]

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My mistake, but the problem survives the fix:

    \setuphead[section][after={\blank[samepage,big]}]
    \starttext
    \showframe
    \dorecurse{50}{a }
    \startsection[title=spec]
    \startxtable
    \startxrow
    \startxcell[ny=30]a\stopxcell\startxcell 1\stopxcell
    \stopxrow
    \dorecurse{29}{\startxrow\startxcell 2\stopxcell\stopxrow}
    \stopxtable
    \stoptext

Sylvain

On Tue, 10 Nov 2020 at 17:11, Sylvain Hubert <champignoom@gmail.com> wrote:

>
> On Tue, 10 Nov 2020 at 16:00, Pablo Rodriguez <oinos@gmx.es> wrote:
>
>> On 11/10/20 9:55 AM, Sylvain Hubert wrote:
>> > Dear List,
>> >
>> > In the following example, the section title appears at the very end of
>> > the first page.
>> > [...]
>> > Does anyone know where to adjust the penalty in this case, so that the
>> > section title can be repositioned to the next page?
>>
>> Hi Sylvain,
>>
>>   \setuphead[title]
>>     [before={\blank[preference, big],
>>      after={\blank[samepage, big]]
>>
>> In this case, the blank space before sets a preference for inserting a
>> page break. The blank space after requires to be in the same page with
>> next paragraph.
>>
>> Of course, you don’t need both simultaneously.
>>
>> Just in case it helps,
>>
>> Pablo
>>
>
> Hello Pablo,
>
> Thank you very much for the help. The penalty of \blank indeed brings the
> solution closer and it does format the previous example correctly.
>
> However, when I went back to the original document, neither
> [before={\blank[preference, big]}] nor [after={\blank[samepage, big]}] nor
> both worked. I trimmed it into the following example which behaves the same:
>
>     \starttext
>     \showframe
>     \dorecurse{50}{a }
>     \startsection[title=spec][before={\blank[preference,big]},
> after={\blank[samepage,big]}]
>     \startxtable
>     \startxrow
>     \startxcell[ny=30]a\stopxcell\startxcell 1\stopxcell
>     \stopxrow
>     \dorecurse{29}{\startxrow\startxcell 2\stopxcell\stopxrow}
>     \stopxtable
>     \stoptext
>
> Do you have an idea on how this could also be formatted correctly or how
> one could inspect and debug the penalty?
>
> Thanks again!
>
> Sylvain
>

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___________________________________________________________________________________

Re: page ends with a section title followed by a table

[Pablo Rodriguez]

On 11/10/20 5:23 PM, Sylvain Hubert wrote:
> My mistake, but the problem survives the fix:
>
>     \setuphead[section][after={\blank[samepage,big]}]
>     \starttext
>     \showframe
>     \dorecurse{50}{a }
>     \startsection[title=spec]
>     \startxtable
Hi Sylvain,

no fix is required when you allow the table to be split:

    \startxtable[split=yes]

Pablo
--
http://www.ousia.tk
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Re: page ends with a section title followed by a table

[Sylvain Hubert]

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On Tue, 10 Nov 2020 at 17:37, Pablo Rodriguez <oinos@gmx.es> wrote:

> On 11/10/20 5:23 PM, Sylvain Hubert wrote:
> > My mistake, but the problem survives the fix:
> >
> >     \setuphead[section][after={\blank[samepage,big]}]
> >     \starttext
> >     \showframe
> >     \dorecurse{50}{a }
> >     \startsection[title=spec]
> >     \startxtable
> Hi Sylvain,
>
> no fix is required when you allow the table to be split:
>
>     \startxtable[split=yes]
>
> Pablo
>

Hi Pablo,

Thanks for the suggestion, but unlike the MWE, in the original document,
the table has ten rows and is visually not suitable for a split. The large
row span is meant to represent this restriction.

Sylvain

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Re: page ends with a section title followed by a table

[Wolfgang Schuster]

Pablo Rodriguez schrieb am 10.11.2020 um 15:59:
> On 11/10/20 9:55 AM, Sylvain Hubert wrote:
>> Dear List,
>>
>> In the following example, the section title appears at the very end of
>> the first page.
>> [...]
>> Does anyone know where to adjust the penalty in this case, so that the
>> section title can be repositioned to the next page?
> Hi Sylvain,
>
>    \setuphead[title]
>      [before={\blank[preference, big],
>       after={\blank[samepage, big]]
>
> In this case, the blank space before sets a preference for inserting a
> page break. The blank space after requires to be in the same page with
> next paragraph.

Another method is to move the section title to the next page when the 
remaining spaces
is below a specified number of lines. The following setup forces a page 
break when
less than 4 lines remain on the current page.

\setuphead
   [section]
   [before={\testpage[4]\blank[2*big]}]

Wolfgang

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Re: page ends with a section title followed by a table

[Sylvain Hubert]

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On Tue, 10 Nov 2020 at 17:54, Wolfgang Schuster <
wolfgang.schuster.lists@gmail.com> wrote:

> Pablo Rodriguez schrieb am 10.11.2020 um 15:59:
> > On 11/10/20 9:55 AM, Sylvain Hubert wrote:
> >> Dear List,
> >>
> >> In the following example, the section title appears at the very end of
> >> the first page.
> >> [...]
> >> Does anyone know where to adjust the penalty in this case, so that the
> >> section title can be repositioned to the next page?
> > Hi Sylvain,
> >
> >    \setuphead[title]
> >      [before={\blank[preference, big],
> >       after={\blank[samepage, big]]
> >
> > In this case, the blank space before sets a preference for inserting a
> > page break. The blank space after requires to be in the same page with
> > next paragraph.
>
> Another method is to move the section title to the next page when the
> remaining spaces
> is below a specified number of lines. The following setup forces a page
> break when
> less than 4 lines remain on the current page.
>
> \setuphead
>    [section]
>    [before={\testpage[4]\blank[2*big]}]
>
> Wolfgang
>

Hi Wolfgang,

Thanks for the suggestion, but as illustrated by the second example, copied
here, where the section title is at the top of the page:

    \starttext
    \showframe
    \dorecurse{50}{a }
    \startsection[title=spec][before={\blank[preference,big]},
after={\blank[samepage,big]}]
    \startxtable
    \startxrow
    \startxcell[ny=30]a\stopxcell\startxcell 1\stopxcell
    \stopxrow
    \dorecurse{29}{\startxrow\startxcell 2\stopxcell\stopxrow}
    \stopxtable
    \stoptext

it is sometimes difficult to predict how much remaining space should
trigger a line break.

Sylvain

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___________________________________________________________________________________

Re: page ends with a section title followed by a table

[Wolfgang Schuster]

Sylvain Hubert schrieb am 10.11.2020 um 18:06:

> Thanks for the suggestion, but as illustrated by the second example, 
> copied here, where the section title is at the top of the page:
> 
>      \starttext
>      \showframe
>      \dorecurse{50}{a }
>      \startsection[title=spec][before={\blank[preference,big]}, 
> after={\blank[samepage,big]}]

Your settings in the second argument of \startsection make no sense
because the optional argument is for userdata (values like author etc.)

>      \startxtable
>      \startxrow
>      \startxcell[ny=30]a\stopxcell\startxcell 1\stopxcell
>      \stopxrow
>      \dorecurse{29}{\startxrow\startxcell 2\stopxcell\stopxrow}
>      \stopxtable
>      \stoptext
> 
> it is sometimes difficult to predict how much remaining space should 
> trigger a line break.

You can either reformat your table or put the table in a float
environment to move it to a place where it fits.

Wolfgang

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Re: page ends with a section title followed by a table

[Sylvain Hubert]

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On Tue, 10 Nov 2020 at 18:25, Wolfgang Schuster <
wolfgang.schuster.lists@gmail.com> wrote:

> Sylvain Hubert schrieb am 10.11.2020 um 18:06:
>
> > Thanks for the suggestion, but as illustrated by the second example,
> > copied here, where the section title is at the top of the page:
> >
> >      \starttext
> >      \showframe
> >      \dorecurse{50}{a }
> >      \startsection[title=spec][before={\blank[preference,big]},
> > after={\blank[samepage,big]}]
>
> Your settings in the second argument of \startsection make no sense
> because the optional argument is for userdata (values like author etc.)
>
> >      \startxtable
> >      \startxrow
> >      \startxcell[ny=30]a\stopxcell\startxcell 1\stopxcell
> >      \stopxrow
> >      \dorecurse{29}{\startxrow\startxcell 2\stopxcell\stopxrow}
> >      \stopxtable
> >      \stoptext
> >
> > it is sometimes difficult to predict how much remaining space should
> > trigger a line break.
>
> You can either reformat your table or put the table in a float
> environment to move it to a place where it fits.
>
> Wolfgang
>

Weirdly enough, "\hskip 0pt" solves the problem.

    \setuphead[section][after={\blank[samepage]\hskip 0pt}]
    \starttext
    \showframe
    \dorecurse{50}{a }
    \startsection[title=spec]
    \startxtable
    \startxrow
    \startxcell[ny=30]a\stopxcell\startxcell 1\stopxcell
    \stopxrow
    \dorecurse{29}{\startxrow\startxcell 2\stopxcell\stopxrow}
    \stopxtable
    \stoptext

Sylvain

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Re: page ends with a section title followed by a table

[Wolfgang Schuster]

Sylvain Hubert schrieb am 10.11.2020 um 19:11:

> Weirdly enough, "\hskip 0pt" solves the problem.
> 
>      \setuphead[section][after={\blank[samepage]\hskip 0pt}]
>      \starttext
>      \showframe
>      \dorecurse{50}{a }
>      \startsection[title=spec]
>      \startxtable


What happens when you \hskip is that you switch to horizontal
mode and the preferred to do this is to use \dontleavehmode.

\dontleavehmode
\startxtable

Wolfgang
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Re: page ends with a section title followed by a table

[Sylvain Hubert]

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On Tue, 10 Nov 2020 at 19:23, Wolfgang Schuster <
wolfgang.schuster.lists@gmail.com> wrote:

> Sylvain Hubert schrieb am 10.11.2020 um 19:11:
>
> > Weirdly enough, "\hskip 0pt" solves the problem.
> >
> >      \setuphead[section][after={\blank[samepage]\hskip 0pt}]
> >      \starttext
> >      \showframe
> >      \dorecurse{50}{a }
> >      \startsection[title=spec]
> >      \startxtable
>
>
> What happens when you \hskip is that you switch to horizontal
> mode and the preferred to do this is to use \dontleavehmode.
>
> \dontleavehmode
> \startxtable
>
> Wolfgang
>

Indeed. Thanks for the information!

For the record, this is how the problem is finally solved:

    \setuphead[section][after={\blank[sampage]}]
    \begingroup\setupindenting[no]\dontleavehmode\startxtable …
\stopxtable\endgroup

Sylvain

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Re: page ends with a section title followed by a table

[Aditya Mahajan]

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On Tue, 10 Nov 2020, Sylvain Hubert wrote:
> Indeed. Thanks for the information!
> 
> For the record, this is how the problem is finally solved:
> 
>     \setuphead[section][after={\blank[sampage]}]
>     \begingroup\setupindenting[no]\dontleavehmode\startxtable …
> \stopxtable\endgroup

Unless you have other reasons to create a group, you can just use:

    \noindentation\dontleavehmode
    \startxtable
    ...
    \stopxtable

Aditya

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