page range reference (how to compare references)
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Hello list, I'm trying to reference a page range (think of a long quote spanning on 2 pages). I need to discriminate ranges collapsing to one page from "real" ranges (2 or more pages): "1-1" should become "1", while "1-2" should stay like that. Here's a not working snippet: \starttext Tufte quote at p. \at[tufte:start]\doifelse{\ref[realpage][tufte:start]}{\ref[realpage][t ufte:stop]} {} {-\at[tufte:stop]} % start of quote reference \pagereference[tufte:start] \input{tufte} %\page % comment/uncomment this to toggle from range to single page \input{tufte} % end of quote reference \pagereference[tufte:stop] \stoptext The \doifelse is always false, I think because \ref[realpage][...] is not a string. Thanks in advance. BTW, best wishes for next week's meeting (hoping to join next year). Best regards, Massi
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I found a solution, but it's tricky (and there's no check on reference existence in structures.references.collected). \directlua{ function userdata.printrange(singular, plural, label) local coll_ref = structures.references.collected[""] local pagestart = coll_ref[label .. ":start"].references.realpage local pagestop = coll_ref[label .. ":stop"].references.realpage if pagestart == pagestop then context(singular) else context(plural) end context("~") context.ref({"page"}, {label .. ":start"}) if pagestart ~= pagestop then context("-") context.ref({"page"}, {label .. ":stop"}) end end function userdata.printpagerange(label) userdata.printrange("page", "pages", label) end } \def\printpagerange#1{\ctxlua{userdata.printpagerange("#1")}} \starttext Tufte quote at \printpagerange{tufte}. % start of quote reference \pagereference[tufte:start] \input{tufte} %\page % comment/uncomment this to toggle from page range to single page \input{tufte} % end of quote reference \pagereference[tufte:stop] \stoptext
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MF