On Dec 22, 2007 9:10 AM, Shen Chen wrote:
> Hi all,
>
>
> I have some chemical formulae in chapter heading and figure captions,
> typeset with the chemic module. The chemic module always uses roman font as
> desired.
>
> When I include them in table of contents and list of figures, the chemical
> formulae appears in math italic font instead of roman font. See the
> following code for example. Chemic Manual mentioned using \rm but it doesn't
> seem to be the case. $\rm H_2O$ works fine in the list, but not
> \chemical{H_2O}. Any suggestions? Thank you.
>
> \usemodule[chemic]
> \starttext
>
> \writetolist[chapter]{}{ABC}
> \writetolist[chapter]{}{$H_2O$}
> \writetolist[chapter]{}{$\rm H_2O$}
> \writetolist[chapter]{}{\chemical{H_2O}}
> \completecontent
>
> \stoptext
The code is too complex for me to be able to understand what's going
on (but it seems like a problem which should be fixed, I agree).
I'm using an "ugly" piece of code from the wiki instead of the module
http://wiki.contextgarden.net/Chemistry
(bottom of the page) when I need to typeset simple chemistry. I also
needed a formula to apear in titiles and it worked really nice.
Mojca
% by Taco
\newbox\chemlowbox
\def\chemlow#1%
{\setbox\chemlowbox\hbox{{\switchtobodyfont[small]#1}}}
\def\chemhigh#1%
{\ifvoid\chemlowbox \high{{\switchtobodyfont[small]#1}}%
\else \/\lohi{\box\chemlowbox}{{\switchtobodyfont[small]#1}}\fi }
\def\finishchem%
{\ifvoid\chemlowbox \else
\iffluor \fluorfalse \kern-.1em \fi\low{\box\chemlowbox}\fi}
% for "kerning" after F
\newif\iffluor
\unexpanded\def\molecule%
{\bgroup
\catcode`\_=\active \uccode`\~=`\_ \uppercase{\let~\chemlow}%
\catcode`\^=\active \uccode`\~=`\^ \uppercase{\let~\chemhigh}%
\dostepwiserecurse {65}{90}{1}
{\catcode \recurselevel = \active
\uccode`\~=\recurselevel
\uppercase{\edef~{\noexpand\finishchem
\rawcharacter{\recurselevel}}}}%
\uccode `\~=`\F \uppercase{\def~{\finishchem F\fluortrue}}%
\catcode`\-=\active \uccode`\~=`\- \uppercase{\def~{--}}%
\loggingall
\domolecule }%
\def\domolecule#1%
{\expandafter\scantokens\expandafter
{\detokenize{#1\finishchem}}\egroup}
\molecule{H_2O}
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