Re: CLD: setupheadertexts

[Wolfgang Schuster <schuster.wolfgang@googlemail.com>]

Am 24.12.2011 um 18:09 schrieb Willi Egger:

> Hi Wolfgang,
> 
> thank you.
> 
> The reason why I ask this question is, because \setupheadertexts has 4 arguments and I was curious about how this would be solved in context/setupheadertexts.
> I will look into your solution. I am not sure whether it will fit into the cld-project.


Can’t you do stuff like this in a style file where you can use TeX macros. A alternative to the \doifoddpageelse macro is to test whether the page counter is or even with the math.odd function.

\startluacode

userdata = userdata or { }

function userdata.myheadertext(rightpage,leftpage)
	local rightpage = rightpage
	local leftpage  = leftpage
	if not leftpage or leftpage == "" then
		leftpage = rightpage
	end
	context.setupheadertexts{
		function()
			if math.odd(tex.count["realpageno"]) then
				context(rightpage)
			else
				context(leftpage)
			end
			return true
		end
	}
end   

\stopluacode

\starttext

\ctxlua{userdata.myheadertext("Right page")}

\dorecurse{4}{\dontleavehmode\page}

\ctxlua{userdata.myheadertext("Right page","Left page")}

\dorecurse{4}{\dontleavehmode\page}

\stoptext

Wolfgang

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