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Re: [AUCTeX-devel] sub and superscripts: without «_» and «^»

From: Uwe Brauer
Subject: Re: [AUCTeX-devel] sub and superscripts: without «_» and «^»
Date: Thu, 03 Sep 2015 09:49:26 +0000
User-agent: Gnus/5.13001 (Ma Gnus v0.10) Emacs/25.0.50 (gnu/linux)

   > Stefan Monnier <address@hidden> writes:

   > I guess what Uwe wants is that `prettify-symbols-mode' in a (La)TeX
   > buffer (with stock latex-mode or AUCTeX; doesn't really matter) could
   > have the option to make the ^ and _ invisible, too.

   > I already told him that this is not what p-s-m is meant for.  But it's
   > easy enough to write a custom font-lock rule for that:

   > (defun th/invisible-super-sub-scripts ()
   >   (interactive)
   >   (cl-pushnew 'invisible font-lock-extra-managed-props)
   >   (font-lock-add-keywords
   >    nil
   >    '(("[^\\\\]\\([_^]\\)" (1 '(face nil invisible t) t))))
   >   (font-lock-flush))

   > Uwe, if you want you could do something like that:

   > (add-hook 'prettify-symbols-mode-hook
   >      (lambda ()
   >        (when (eq major-mode 'latex-mode)
   >          (th/invisible-super-sub-scripts))))

Thanks again Tassilo.
With these new setting and functions, prettify-symbols-mode behaves
almost as x-symbol-mode[1]

I strongly recommend to include the code in Auctex, maybe with a
additional variable, something like this

(defvar prettify-invisible-super-sub-scripts t
  "*Variable which makes the «_» and «^» invisible.")

Or use defcustom

(add-hook 'prettify-symbols-mode-hook
          (lambda ()
            (when (eq major-mode 'latex-mode)
              (if prettify-invisible-super-sub-scripts

Uwe Brauer 

[1]  the only difference is that in x-symbol-mode
\includegraphics{fig.png} is, via imagemagick, presented as an embedded
image. I am pretty sure GNU emacs could do this as well....

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