On Thu, 8 Jun 2006, Aditya Mahajan wrote:
> On Thu, 8 Jun 2006, John R. Culleton wrote:
>
>> Here is a common situation. I need a doublesided layout so I can
>> adjust the backspace. I want the header text on evens and odds
>> centered over the text block. To simplify the issue let's say
>> I want "left" on the evens and "right" on the odds. If I specify
>> (per the manual)
>> \setupheadertexts[text][left][right]
>> then I get both words on both pages.
>> If I use two extra sets of [] then I can get "left" on the left
>> and "right" on the right but I cannot get them centered.
>>
>> I am missing something obvious I am sure. Anyone have a firm
>> grasp of the obvious? I don't.
>
> If I understand you correctly, use \setupheadertexts[center]. If you
> want something in the left, center and right, then do
>
> \setupheadertexts[left][right]
> \setupheadertexts[center]
I misread your mail. How about something like this
\def\setupextendedheadertexts{%
\dosixtupleempty\dosetupextendedheadertexts}
\def\dosetupextendedheadertexts[#1][#2][#3][#4][#5][#6]{
\setupheadertexts[] %Empty the center headers
\setupheadertexts
%Odd page
[{\rlap{#1}\hfill#2\hfill\llap{#3}}][]
%Even page
[][{\rlap{#4}\hfill#5\hfill\llap{#6}}]}
\setupextendedheadertexts[odd-left][odd-center][odd-right][even-left][even-center][even-right]
\starttext
\dorecurse{10}{This is a test \page}
\stoptext
This does not take care of "magic" texts like pagenumber, section,
chapter. If you want that, you can try (careful with linebreaks)
\def\setupextendedheadertexts{%
\dosixtupleempty\dosetupextendedheadertexts}
\def\dosetupextendedheadertexts[#1][#2][#3][#4][#5][#6]{
\setupheadertexts[] %Empty the center headers
\setupheadertexts
%Odd page
[{\rlap{\domagic{#1}}\hfill\domagic{#2}\hfill\llap{\domagic{#3}}}][]
%Even page
[][{\rlap{\domagic{#4}}\hfill\domagic{#5}\hfill\llap{\domagic{#6}}}]}
\unprotect
\def\domagic#1{%
\convertargument#1\to\ascii
\doifsomething\ascii{%
\doifelsemarking\ascii
{\getmarking[\ascii][\v!first]}
{\ConvertConstantAfter\doifelse\v!pagenumber{#1}
\@@plaatspaginanummer
{\ConvertConstantAfter\doifelse\v!date{#1}
{\currentdate}
{#1{}{}{}}}}}}
\protect
\setupextendedheadertexts[date][chapter][pagenumber][pagenumber][section][Whatever]
\starttext
\dorecurse{4}{
\chapter{Chapter \recurselevel}
\input tufte \endgraf
\input tufte \endgraf
\input tufte \endgraf
\section{Section}
\input knuth
\input knuth
\input knuth
}
\stoptext
Aditya
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