Re: change dollars to displaymath or equation*

[Tassilo Horn]

Tohiko Looka <toh.looka@gmail.com> writes:

Hi!

> If you use smart-paren, you can add the following so that \( \)
> is added every time you press $ (not following a backslash).
>
> (sp-with-modes '(latex-mode)
>       (sp-local-pair "$" nil :actions :rem)
>       (sp-local-pair "\\(" "\\)"
>                      :unless '(sp-point-before-same-p
> sp-latex-point-after-backslash)
>                      :trigger-wrap "$"
>                      :trigger "$"
>                      :actions '(wrap insert autoskip navigate)))

AUCTeX already has `TeX-electric-math', see (info "(auctex) Quotes").

--8<---------------cut here---------------start------------->8---
   TeX and LaTeX users often look for a way to insert inline equations
like '$...$' or '\(...\)' simply typing '$'.  AUCTeX helps them through
the customizable variable 'TeX-electric-math'.

 -- User Option: TeX-electric-math
     If the variable is non-nil and you type '$' outside math mode,
     AUCTeX will automatically insert the opening and closing symbols
     for an inline equation and put the point between them.  The opening
     symbol will blink when 'blink-matching-paren' is non-nil.  If
     'TeX-electric-math' is nil, typing '$' simply inserts '$' at point,
     this is the default.

     Besides 'nil', possible values for this variable are '(cons "$"
     "$")' for TeX inline equations '$...$', and '(cons "\\(" "\\)")'
     for LaTeX inline equations '\(...\)'.

     If the variable is non-nil and point is inside math mode right
     between a couple of single dollars, pressing '$' will insert
     another pair of dollar signs and leave the point between them.
     Thus, if 'TeX-electric-math' is set to '(cons "$" "$")' you can
     easily obtain a TeX display equation '$$...$$' by pressing '$'
     twice in a row.  (Note that you should not use double dollar signs
     in LaTeX because this practice can lead to wrong spacing in typeset
     documents.)

     In addition, when the variable is non-nil and there is an active
     region outside math mode, typing '$' will put around the active
     region symbols for opening and closing inline equation and keep the
     region active, leaving point after the closing symbol.  By pressing
     repeatedly '$' while the region is active you can toggle between an
     inline equation, a display equation, and no equation.  To be
     precise, '$...$' is replaced by '$$...$$', whereas '\(...\)' is
     replaced by '\[...\]'.
--8<---------------cut here---------------end--------------->8---

Bye,
Tassilo