Howto disable syntax-highlighting for '$'-enclosed math?

Howto disable syntax-highlighting for '$'-enclosed math?

[Stefan Klinger]

Hello,

I need to disable the syntax-highlighting for '$'-enclosed math in LaTeX
mode. This is quite important for me: I'm typesetting a lot of XQuery code
snippets that contain '$' characters to mark variable names:

  \iquery{$q = "foo"}
  
or, as an environment:

  \begin{query}
fn:count($doc//target)
  \end{query}
  
These code snippets are typeset with the "listings" package.

Emacs always displays text following a '$' in green until another '$'
occurs. This is annoying, and basically wrong because I never entered math
mode. As a workaround I started adding "%$<newline>" sequences to end the
highlighting, but this interferes heavily with M-q (bound to
fill-paragraph). Also, it's an ugly hack.

So how can I make the LaTeX-mode handle $ as an ordinary character?

Btw.: Using \$ in the queries is not a good option: I failed to configure the
listings package to accept this. Also, an advantage of the listings package is
that the queries do not need escaping.

Thak you very much!
Stefan



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Stefan Klinger                                      o/klettern
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Re: Howto disable syntax-highlighting for '$'-enclosed math?

[Thamer Mahmoud]

Stefan Klinger <all-lists@stefan-klinger.de> writes:

> Hello,
>
> I need to disable the syntax-highlighting for '$'-enclosed math in LaTeX
> mode.
[...]
> Emacs always displays text following a '$' in green until another '$'
> occurs. This is annoying, and basically wrong because I never entered math
> mode.

I think you're better of using AUCTeX, which has built-in support for
syntax-highlighting in listings environment (and many other features).

Get it from here:
http://www.gnu.org/software/auctex/

As for vanilla tex-mode, this should partially work (it works for the
text after the `$', but not the `$' itself):

(font-lock-remove-keywords nil ''("\\$\\$\\([^$]+\\)\\$\\$" 1 tex-math-face))
(font-lock-remove-keywords nil ''("\\$\\$\\([^$]+\\)\\$\\$" (1 tex-math-face)))

I got this information by looking at the value of `font-lock-keywords'
(using C-h v). Also see the documentation of `font-lock-remove-keywords'
(using C-h f) for other options.

hth,
Thamer