> Am 07.03.2015 um 00:46 schrieb mf <mass...@fastwebnet.it>:
>
> Hello,
> I'm trying to typeset a book made of letters with ConTeXt.
> Every letter has a title a subtitle and a date, before it
> starts with "Dear ..."
> Like this:
> ---------------------------------
> Title
> subtitle
> where, when
> Dear ...,
> the rest of the letter
> ...
> ---------------------------------
>
> The letters are very different in length -- some are long,
> some are made of a couple of lines --, so I'd like to
> typeset them continuously, without skipping to a new page
> every new letter (\setuphead[LetterTitle][page=no]).
>
> This way a letter could finish beyond the half of a page,
> and the next one could have no space left to get the part
> from Title to the first lines of the body on the same page.
>
> That's why I disabled page breaks from Title to the first
> paragraph after "Dear ...": it would be ugly having only
> the title in one page and the rest in the next ones.
>
> But there's a side effect: the title of the new letter
> "pulls" the last two lines (the penalties are set to avoid
> one-line widows) of the previous letter to the new page,
> even when there's room for them on the previous page.
> In this case I would like ConTeXt to break the page at
> the end of the previous letter, before the next letter title.
> That's why I've set
> before={\blank[2*line]\page[preference]}
> in LetterTitle. But it does not work.
> Example:
> --------------------- ---------------------
> text of the previous text of the previous
> letter with room to be letter with room to be
> all typeset here all typeset here
> page 11 last two lines of the
> [room for >2 lines] the previous letter
>
> page break------------------- ==> -------------------
> last two lines of the Title
> the previous letter subtitle
> ...
> page 12 Title
> subtitle
> ...
>
> -------------------- --------------------
>
> Is there a way to know the vertical location where the
> previous letter ends, to decide whether to skip to a new
> page?
You can use the \testpage command where you can set how many
lines should remain on the page before a page breaks happens.
\setuphead[LetterTitle][before={\testpage[8]\blank[2*line]}]
If this doesn’t help you should make a *working* minimal example.
Wolfgang
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