Referring to multiple elements
Hi, how can I refer to multiple elements at the same time? \starttext \startplacefigure [title=foo, reference=alpha] \stopplacefigure \startplacefigure [title=bar, reference=beta] \stopplacefigure \startplacefigure [title=bar, reference=gamma] \stopplacefigure \in{figure}[alpha,beta,gamma] \stoptext This outputs “figure 1”. What I'd like to have is “figure 1-3”. Marco
Hi Marco, I do not know if there is a solution to this. The following would work for your example: \in{figure}[alpha]--\in[gamma] Of course this is a quite rigid solution, that does not safeguard against changes in figure order...So probably not what you were looking for. Cheers, Andreas Am Sep 13, 2012 um 12:15 PM schrieb Marco Patzer:
Hi,
how can I refer to multiple elements at the same time?
\starttext
\startplacefigure [title=foo, reference=alpha] \stopplacefigure \startplacefigure [title=bar, reference=beta] \stopplacefigure \startplacefigure [title=bar, reference=gamma] \stopplacefigure
\in{figure}[alpha,beta,gamma]
\stoptext
This outputs “figure 1”. What I'd like to have is “figure 1-3”.
Marco
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2012-09-13 Andreas Mang
I do not know if there is a solution to this. The following would work for your example:
\in{figure}[alpha]--\in[gamma]
Of course this is a quite rigid solution, that does not safeguard against changes in figure order
That's what I am using at the moment. Apparently there is no such functionality. This one would go on my wish list. Marco
Hi Marco, The heart of what you need is a lua function that will take an array of numbers, and return an array of consective-number runs, like so: fignumarray = {1, 2, 3, 5, 6, 8, 10, 11, 12} -- figruns = get_runs(fignumarray) -- returns a table structured like so: --> figruns[1].start = 1, figruns[1].stop = 3, --> figruns[2].start = 5, figruns[2].stop = 6, --> figruns[3].start = 8, figruns[3].stop = 8, --> figruns[4].start = 10, figruns[4].stop = 12 I've written one below, plus the scaffolding required to feed it the right input, and print its output to ConTeXt. Only two functions still need writing --- one to turn the context argument [fig:f1, fig:f2, fig:f4] into a lua array of strings, and one to turn each reference string into a figure number. But this should get you on your way. If you're not comfortable with programming LuaTeX, say so and I can fill in the two missing functions sometime this weekend. But they should be doable, really. (And, of course, you may be far more experienced in LuaTeX than I, I don't know.) Cheers, Sietse % should be below startluacode block, but clearer like so \def\inwithranges[#1]% {\ctxlua{u.inwithranges("#1")}} \startluacode u = userdata or { } function get_runs(a) runs = { } run_start = 1 while run_start <= #a do run_stop = run_start while a[run_stop + 1] == a[run_stop] + 1 do run_stop = run_stop + 1 end print(a[run_start] .. "-" .. a[run_stop]) table.insert(runs, {["start"] = a[run_start], ["stop"] = a[run_stop]}) run_start = run_stop + 1 end return runs end function u.inwithranges(ref_string) -- CTX... means I expect ConTeXt already has this function in a library somewhere local ref_array = CTXstring_to_array(refs_string) --FIXME local ref_numbers = { } for _, v in ipairs(ref_array) do ref_numbers[i] = CTXref_to_fignumber(array) --FIXME end ref_numbers.sort() runs = get_runs(ref_numbers) for i, run in ipairs(runs) do context.in( {run.start} ) context("-") context.in( {run.stop} ) if i < #runs then context(',') end end end \stopluacode
2012-09-14 Sietse Brouwer
The heart of what you need is a lua function that will take an array of numbers, and return an array of consective-number runs, like so:
[…]
I've written one below, plus the scaffolding required to feed it the right input, and print its output to ConTeXt.
I wonder if this function is not already present in ConTeXt. The register mechanism, for instance, already does something very similar: \setupregister [index] [compress=yes] \starttext A\index{A} \page A\index{A} \page aaa \page bbb \page A\index{A} \page A\index{A} \page A\index{A} \placeindex %% => A 1-2, 5-7 \stoptext
Only two functions still need writing --- one to turn the context argument [fig:f1, fig:f2, fig:f4] into a lua array of strings, and one to turn each reference string into a figure number.
I'm quite sure that all the building blocks are already present. I'm not sure about the case when the float number is preceded by a chapter number.
If you're not comfortable with programming LuaTeX, say so and I can fill in the two missing functions sometime this weekend. But they should be doable, really.
Someone with more expertise and knowledge about the ConTeXt internals should be able to point to the relevant functions. I guess the code that produces the index compression is located in registers.flush() in strc-reg.lua, but apparently it's not a function and I don't know if it can be adopted for the float referencing.
(And, of course, you may be far more experienced in LuaTeX than I, I don't know.)
Probably not. I can read and write simple Lua scripts, but I lack knowledge about the LuaTeX and ConTeXt internals and the data structures used. For LuaTeX there is a manual that explains a lot, but it doesn't help figuring out how ConTeXts float referencing mechanism works. Thanks for the work you spend on this. I don't need this function for the current project (I use the workaround), but I would like to see this feature in ConTeXt. If you have time and expertise to implement this, it would be great. Otherwise I'll do the range referencing manually. Regards Marco
Hi Marco, (PS for Hans), Marco wrote:
\in{figure}[alpha,beta,gamma]
This outputs “figure 1”. What I'd like to have is “figure 1-3”.
The attached quasi-module seems to do it! On my computer, at least. (I call it 'quasi' because it is really nothing more than code in a file of its own. No configurability whatsoever, except to the extent that I tried to comment well, and split things up into functions.) I'd have written it so that it properly identifies runs like '1.2.1, 1.2.2, 1.2.3', too, but I can't find a function that will turn reference strings into such a prefixed strings. I hope it does what you want! Let me know if you want/need any alterations, or discover bugs. Sietse PS @Hans: if figure numbers have prefix segments, is there any (combination of) helper function that will return e.g. the string '1.2.3' given the reference string "ref:fig-three"? I found commands.savedlistprefixednumber(nil, numberinlist), but that is a wrapper around sections.typesetnumber; and that last function injects the string into the TeX stream instead of returning it. Is there another function I haven't found yet that will do this, or are prefixes implemented print-only at the moment?
2012-09-28 Sietse Brouwer
\in{figure}[alpha,beta,gamma]
This outputs “figure 1”. What I'd like to have is “figure 1-3”.
The attached quasi-module seems to do it! On my computer, at least. (I call it 'quasi' because it is really nothing more than code in a file of its own.No configurability whatsoever, except to the extent that I tried to comment well, and split things up into functions.) I'd have written it so that it properly identifies runs like '1.2.1, 1.2.2, 1.2.3', too, but I can't find a function that will turn reference strings into such a prefixed strings.
I hope it does what you want! Let me know if you want/need any alterations, or discover bugs.
Thanks a lot for that. I'd adjust the interface, so that it matches the behaviour of \in: \def\inrange {\dodoublegroupempty\doinrange} \def\doinrange#left#right#dummy[#label] {\iffirstargument {#left }%% \fi \ctxlua{userdata.inwithranges("#label")}%% \ifsecondargument {#right}%% \fi} Then you can write: See \inrange{figures} [fig:a,fig:c,fig:d,fig:e,fig:g,fig:x,fig:h] See \inrange{figures}{TT} [fig:a,fig:c,fig:d,fig:e,fig:g,fig:x,fig:h] See \inrange [fig:a,fig:c,fig:d,fig:e,fig:g,fig:x,fig:h] Maybe worth mentioning: You need the additional module `showtable.lua` from http://article.gmane.org/gmane.comp.tex.context/78336 Marco
Hi Marco, Marco wrote:
Maybe worth mentioning: You need the additional module `showtable.lua` from http://article.gmane.org/gmane.comp.tex.context/78336
Oops, that was a debugging statement. Removed.
Thanks a lot for that. I'd adjust the interface, so that it matches the behaviour of \in:
See \inrange{figures} [fig:a,fig:c,fig:d,fig:e,fig:g,fig:x,fig:h] See \inrange{figures}{TT} [fig:a,fig:c,fig:d,fig:e,fig:g,fig:x,fig:h] See \inrange [fig:a,fig:c,fig:d,fig:e,fig:g,fig:x,fig:h]
Done. New version uploaded to Github: https://github.com/sietse/context-inrange Cheers, Sietse
participants (3)
-
Andreas Mang -
Marco Patzer -
Sietse Brouwer