Matthijs Kooijman wrote:
Hi Hans,
thanks for the instant reply :-) I haven't tried your suggestion yet, but I've got a few questions first.
\startluacode function document.step_one(str) tex.sprint("\\setbox0\\hbox{",str,"}") Would there be any danger of overwriting an existing box by doing this? I'm not quite sure how this boxing thing works...
well, you can allocate a box for that purpose
tex.sprint("\\ctxlua{document.step_two(0)}")
I guess this indirection is needed to force the \setbox command to be expanded? I guess tex.sprint doesn't expand its arguments immediately, so just putting document.step_two(0) instead of the entire tex.sprint("\\ctxlua... won't work...
I'm using this from inside a pretty printer, so I'd have to think a bit about how to set this up so things run inside the right context and stuff, but I guess that should work out. Still slightly more complicated that a direct "How wide is this thing" function, though.
function document.step_two(n) tex.sprint("width: ",tex.wd[0]) end I gues you mean tex.wd[n] here, but whatever :-)
\ctxlua{document.step_one("test {\\bf test} test")}
\box0 Why is this \box0 needed? Just to show the test test test output? AFAICS, the width of the box will be displayed always, even without this?
just try .. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------