Re: [NTG-context] Adjusting column width dynamically to get rid of orphans and widows

On 28 June 2017 at 13:49, Thomas Widmann wrote:

On 28 June 2017 at 12:57, Hans Hagen wrote:

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On 6/28/2017 1:20 PM, Thomas Widmann wrote:

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What I'd really like to know is whether the relevant parts of TeX have been Luafied already (in which case I might do it soon), or whether doing this would require making changes to LuaTeX itself (in which case I might not want to touch this yet)…

al relevant parts are opened up

Do you happen to know whether anybody has ever done anything vaguely similar that I can base this on, or would I be better off starting from scratch?

I must admit I'm struggling a bit with how to do this. I was looking at using buildpage_filter to add some code, but that gets called when "LuaTeX is ready to move stuff to the main vertical list" according to the manual, so I would only be able to affect where the page break happens, not how the paragraphs get typeset. Or am I wrong? Is there any way to re-typeset a paragraph in the current vertical list once you've got as far as buildpage_filter? (Of course, half the paragraph might already have output to the preceding page, so the re-typesetting might have to start mid-paragraph.) Would it be easier to re-typeset the entire document? I.e., whenever a widow or orphan gets generated, mark the entries on the current page in some way (in the aux file?), and then typeset the whole thing again, typesetting the entries marked slightly differently. Any help would be much appreciated! Thomas -- Thomas Widmann Director Complexli Limited +44 789 444 3009