Re: [NTG-context] TeX control sequence inside XML param

31 Jan 2005


      Hans Hagen wrote:
...
Vit Zyka wrote:
\startXMLdata
<float>
  <figure file="cow.pdf" context="width=.5&ctx-var-textwidth;" />
  <figure file="hacker.jpg" context="width=3cm" />
  <caption>Cow and hacker.</caption>
</float>
\stopXMLdata
food for thought ... (and the wiki)
That is a clever solution! This two pass tag processing. I have not been 
thinking this way yet. Thank you, Hans. (Wiki: 
http://contextgarden.net/Two_pass_tag_processing_example)

Unfortunately I have next two problems:
1) How to process <pre> HTML tag. I have tried many solution derived from
-----
\starttext
\defineXMLenvironment[pre]
   {\starttyping}
   {\stoptyping}
\startXMLdata
   <pre>
     Some code line.
     And another one.
   </pre>
\stopXMLdata
\stoptext
-----
but without success.

2) It seems to me there is some catcode clash inside XML environment:
-----
\defineXMLentity[hyphen]{|_|}
\starttext
   dojde|_|li
   \startXMLdata
     dojde‐li
   \stopXMLdata
\stoptext
------

Vit Zyka
...
\starttext
\useMPlibrary[dum]
\defineXMLentity[ctx-var-textwidth] {\textwidth}
\defineXMLenvironmentsave
  [float]
  {\bgroup
   \defineXMLsave[caption]%
   \defineXMLignore[figure]}
  {\XMLflush{float}%
   \defineXMLignore
     [caption]
   \defineXMLcommand
     [figure]
     [file=dummy,context=]
     {\expanded{\externalfigure
       [\XMLflush{dir-fig}\XMLop{file}][\XMLop{context}]}%
      \kern1em
      \ignorespaces}%
   \placefigure
     {\XMLflush{caption}}
     {\hbox{\ignorespaces\XMLflush{float}\removeunwantedspaces}}%
   \egroup}
\startXMLdata
<float>
  <figure file="cow.pdf" context="width=.5&ctx-var-textwidth;" />
  <figure file="hacker.jpg" context="width=3cm" />
  <caption>Cow and hacker.</caption>
</float>
\stopXMLdata
\stoptext