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Re: scope environment in TikZ

From: Arash Esbati
Subject: Re: scope environment in TikZ
Date: Tue, 15 Nov 2022 09:55:10 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50

Hi Keita,

Ikumi Keita <> writes:

>>>>>> Arash Esbati <> writes:
>> Keep in mind that if you want to use in-buffer completion when you're
>> inside the brackets, you need `(TeX-arg-key-val key=vals)' in the hook,
>> so I think the best would be if you could see if you achieve what you're
>> looking after with `LaTeX-env-args' -- but I think that wouldn't work
>> because of the (save-excursion ...) it uses?
> My understanding is that `(TeX-arg-key-val key=vals)' is necessary
> instead of `TeX-TikZ-env-scope' in
> (TeX-add-style-hook
>  ...
>  (lambda ()
>    (LaTeX-add-environments
>     ...
>     '("scope" TeX-TikZ-env-scope))
>               ^^^^^^^^^^^^^^^^^^
> in order for in-buffer completion inside brackets of scope environment
> to work. Right?

Right.  But as always, this is not the whole truth, check the variable
`LaTeX-completion-function-map-alist-keyval' :-)

> If so, it's yet far beyond ready. I let the future developers of tikz.el
> to accomplish that :-)

Hmm, and I thought we have that volunteer ;-)  Looking at the size of the
manual, I wonder if that will ever happen.  Maybe using the Digestif
LSP-server helps here (which I never used).

> Anyway, I'll commit my proposal in a few days unless further comment
> arrives from someone.

What I described above was that you can probably also use
`LaTeX-env-args', here is a test style:

--8<---------------cut here---------------start------------->8---
;; tikz-scope.el for testing             -*- lexical-binding: t; -*-

(defvar TikZ-scope-key-vals
  '(("NORMALSIZE" ("true" "false"))
    ("LARGE" ("true" "false"))))

;; This is the current definition:
(defun LaTeX--env-parse-args (args)
  "Helper function to insert arguments defined by ARGS."
    (let ((TeX-exit-mark (or TeX-exit-mark
      (TeX-parse-arguments args))))

;; This is the supposed definition:
(defun LaTeX--env-parse-args (args)
  "Helper function to insert arguments defined by ARGS."
  (let ((TeX-exit-mark (or TeX-exit-mark
    (TeX-parse-arguments args)
    (goto-char (marker-position TeX-exit-mark))
    (set-marker TeX-exit-mark nil)))

(defun TeX-TikZ-env-scope (_optional)
  (search-forward TeX-grcl (line-end-position) t)
  (if (= (following-char) ?\[)
      (set-marker TeX-exit-mark (1+ (point)))
    (insert LaTeX-optop LaTeX-optcl)
    (set-marker TeX-exit-mark (1- (point)))))

 (lambda ()
    '("scope" LaTeX-env-args
      [TeX-read-key-val TikZ-scope-key-vals]
--8<---------------cut here---------------end--------------->8---

But this is not possible with the current definition of
`LaTeX--env-parse-args'.  What do you think about the suggested change?
Please don't get me wrong, I'm not insisting on a change of your code, I
was just wondering if it's possible to do it with `LaTeX-env-args'.  I
think we have a bug here which we should fix.

Best, Arash

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