Thanks. The problem happens in a case where there are no paragraph split between 2 pages. All pars are entirely either in page 1 or page 2 (these numbers are not actual page numbers, but it’s for clarity). I am trying to create a MWE but it’s not trivial. The situation as far as I understand it is like the following : I’ve added tracers for vspacing.synchronizepage function. When page 1 ships, there are 2 paragraphs (1 + 3 lines) still pending because they do not fit in page 1 so they will be shipped in page 2 (I think that what is in texlists.page_head variable). Hence tex.prevgraf which was 0 is set to 4 (see this from traces in output log). vspacing > page 4, prevdepth 2.56577pt => 2.56577pt, prevgraf 0 => 4 vspacing > list glue:topskip hlist:line penalty:userpenalty penalty:userpenalty glue:baselineskip hlist:line penalty:linebreakpenalty glue:baselineskip hlist:line penalty:linebreakpenalty glue:baselineskip hlist:line glue:userskip Next paragraph after the 2 pending pars I refer to above has a non zero \hangindent and \hangafter (set to -1) and when it starts being processed (in horizontal mode) prevgraf is already 4 so I think this cancels out that hanging (that’s the effect I see in output, there is no indent in 1st line of 3rd par), as IIRC TEX considers par has already 4 lines but in actuality it has 0. If I read correctly the TeXBook, prevgraf value has some impact on \hangafter / \hangindent The value of \prevgraf affects line breaking only when TEX is dealing with nonstandard \parshape or \hangindent. Joseph De : Hans Hagen Envoyé le :jeudi 19 juillet 2018 00:00 À : Joseph Canedo; mailing list for ConTeXt users Objet :Re: [NTG-context] Issues with vertical spacing in simple case On 7/18/2018 10:33 PM, Joseph Canedo wrote:
Thanks Hans.
Picked up today beta and some code I have relying on value of tex.prevgraf starts breaking. This is lettrine related code that sets hangafter for 1st paragraph and eventually subsequent if lettrine is larger than 1st par.
I see the function vspacing.synchronizepage() sets prevgraf value I guess to avoid bleeding also paragraph lines.
Is there any possibility to get original unchanged tex.prevgraf value, possibly using some callback or some other tex.<Something> ? you cannot rely on prevgraf crossing pages (so you get e.g. 8 at the top of a page with 5 lines
where/how does it fail Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------