At 10:15 PM 2/11/2002 +0100, you wrote:
>On Sun, Feb 10, 2002 at 10:04:15PM +0100, Hans Hagen wrote:
>
>First the problem in English:
>
>I want to render the revhistory as a table. But it may have a large
>range of fields. Preferably I would like to be able to see which
>fields occur, and only include those columns.
>
>This code works fine, and it teaches me that it is not necessary to
>write to an auxiliary file. All data can be built in memory.
>
>But I want more. The following is an appropriate test text. Each row
>may show a different selection from the possible fields. And all rows
>together may only use a subset of the set of possible fields. I only
>want to include the fields actually used; so I do not want to show the
>field authorinitials if that is not used in any of the rows.
I already gambled on you asking this:
% watch how we now redefine the #1 element to a saved one
\def\WhatAHackA#1%
{\defineXMLenvironmentsave[#1]
{\doglobal\addtocommalist{#1}\CrapList
\bTD#1\eTD\defineXMLsave[#1]}
\donothing}
% here we first erase them all, then save them when present, and finaly add
them to the table
\def\WhatAHackB#1%
{\bTR
\processcommacommand[\CrapList]\XMLerase
#1% sets content
\processcommacommand[\CrapList]\WhatAHackC
\eTR}
% a cell
\def\WhatAHackC#1%
{\expanded{\bTD\XMLflush{#1}}\eTD}
% a slightly different main macro
\defineXMLenvironmentsave[revhistory]
{\bgroup}
{\def\HackList{revnumber,date,revremark,authorinitials}
\gdef\CrapList{}
\defineXMLenvironment[revision] \donothing \donothing
\processcommacommand[\HackList]\WhatAHackA
\bTABLE
\bTR\XMLflush{revhistory}\eTR
\defineXMLargument[revision] \WhatAHackB
\XMLflush{revhistory}%
\eTABLE
\egroup}
% [still no aux file needed]
Hans
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Hans Hagen | PRAGMA ADE | [EMAIL PROTECTED]
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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