Hi Pablo,
Indeed the document I was talking about has been typeset with various versions
of mkiv, but now I observe that sometimes the pagebreaks are made in a very
strange way. Since I can’t make a minimal example, I put on the following link
an excerpt of the PDF document where the bad pagebreaks can be seen:
https://dl.dropboxusercontent.com/u/4316076/bad-pagebreak.pdf
(Please see pages 19 and 32). It seems that this happens, sometimes, but as far
as I can say from my experiments the bad pagebreak happens always before a «
proclaim » which is defined as follows:
\defineenumeration[proclaim]
[text=,
before={\blank\startbackground[frame=off,leftframe=on,
rulethickness=2pt,framecolor=darkred,
background=color,
backgroundcolor=screen]},
after={\stopbackground\blank},
style=slanted,
title=yes,
titleleft=,
titleright={.},
alternative=hanging,
width=fit,
right={~},
way=bysection,
prefix=yes,
prefixsegments={chapter:section}]
Actually I found a workaround for this by changing the above definition into:
\defineenumeration[proclaim]
[text=,
before={\blank\startmarginrule[rulethickness=1pt,rulecolor=darkred]},
after={\stopmarginrule},
style=slanted,
title=yes,
titleleft=,
titleright={.},
alternative=hanging,
width=fit,
right={~},
way=bysection,
prefix=yes,
prefixsegments={chapter:section}]
However it would be better to understand why the first definition does not work
properly, in a rather random way.
Best regards: OK
> On 01 Jun 2015, at 00:16, Hans Hagen <pra...@wxs.nl> wrote:
>
> On 5/31/2015 1:56 PM, Pablo Rodriguez wrote:
>> On 05/28/2015 07:10 PM, Hans Hagen wrote:
>>> On 5/27/2015 10:38 PM, Pablo Rodriguez wrote:
>>>> [...]
>>>> Compiling it with beta from 2015.03.25 22:13, page break is fine.
>>>>
>>>> But with latest beta from 2015.05.24 12:42 (or even with beta from
>>>> 2015.05.15 11:42 includes a wrong page break. The setups for widow and
>>>> orphan lines move the two last lines to the next page.
>>>>
>>>> Could anyone confirm this bug?
>>>
>>> i wonder if it's a bug or just tex's decision ... you can use
>>>
>>> \showmakeup[penalty]
>>>
>>> and see what penalties get injected
>>>
>>> are the linebreaks identical, i.e. same hyphenation?
>>
>> Many thanks for your reply, Hans.
>>
>> Hyphenation is the same in both documents.
>>
>>> btw, brokenpenalty 1 gives a different result
>>
>> Page break is wrong when any of the three values (brokenpenalty,
>> widowpenalty or clubpenalty) is 0 or above 9999.
>>
>> I replacing \subsection with \section gives the right page break:
>>
>> \showframe\showgrid
>> \setuplayout[setups=*lessstrict]
>> \startsetups[*lessstrict]
>> \setup[reset]
>> \widowpenalty=10000
>> \clubpenalty=10000
>> \brokenpenalty=0
>> \stopsetups
>> \setupbodyfont[pagella, 12.6pt]
>> \starttext
>> \chapter{Quotes}
>> \section{Zapf}
>> \dorecurse{4}{\input zapf\par}
>> \section{Knuth}
>> \input knuth
>> \stoptext
>>
>> Why does \subsection cause a different page break than \section?
>
> because there are penalties related to (sub)sections in a way that keeps them
> together but at the same time still permits breaks in case of too many
> successive ones .. and penalties determine the way the page is broken
>
> Hans
>
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