Re: org-pretty-entities and symbols like M_x^y

[Rasmus <rasmus@gmx.us>]

Bastien <bzg@altern.org> writes:

> M_x ^y is the only (non fully satisfactory) solution I can think of.

In general org entities work wonders, and I'm a very happy user.

I have a couple of others things that could be made nicer (somehow).
'===>' indicates what would be nicer:

 - \frac{x}{y} ===> [(x)/(y)] or something similar. You'd need to be
   able to see that it was folded, somehow, e.g. '[' could have
   another color, or the background of (x)/(y) could be different.
 - \bar{x}, tilde{x}, underline{x}, ... ==> constructed using
   combining utf8 characters ¹ (or at least support of it; i couldn't
   get it working properly)
 - Being able to specify several white spaces (it seems not to work,
   e.g. below I would like to replace quad with " ␣ ", but this
   doesn't seem to work...).
 - perhaps overlay to indicate when something is folded/replaced with
   a utf8 character.

Here's my org-entities-user btw:

(setq org-entities-user '(("space" "\\ " " " " " " " " ")
                          ("implies" "\\Rightarrow" t "&rArr;" "=>" "=>" "⇒")
                          ("iff" "\\iff" t "&hArr;" "<=>" "<=>" "⇔")
                          ("succcurlyeq" "\\succcurlyeq" t "≽" ">=" ">=" "≽")
                          ("gimel" "\\gimel" t "&#8503;" "gimel" "gimel" "ℷ")
                          ("beth" "\\beth" t "&#1489;" "bet" "bet" "ב")
                          ("coloneqq" "\\coloneqq" t "≔" ":=" ":=" "≔")
                          ("eqqcolon" "\\eqqcolon" t "≕" "=:" "=:" "≕")
                          ("cdots" "\\cdots" t "&hellip;" "..." "..." "⋯")
                          ("colon" "\\colon" t ":" ":" ":" ":")
                          ("quad" " " nil " " " " " " "␣")
                          ("geq" "\\ge" t "&ge;" ">=" ">=" "≥")
                          ("suchthat" "\\suchthat" t "|" "|" "|" "|")
                          ("leq" "\\leq" t "&le;" "<=" "<=" "≤")))

All but suchthat are normal LaTeX characters.  


Perhaps, org entities could use the TeX input method as a souce of
symbols?  See:

     (describe-input-method "TeX") 

–Rasmus


Footnotes: 
 ¹   https://en.wikipedia.org/wiki/Combining_character

-- 
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