Can't display the math symbols represented by company-math.

[hongyi-zhao]

On Ubuntu 20.04, I test the company-math package with some symbols listed in The Comprehensive LATEX Symbol List in Emacs/AUCTeX with some of the same symbols shown here. The Emacs configuration is as follows:

(use-package company-math)
;; local configuration for TeX modes
(defun my/latex-mode-setup ()
  (setq-local company-backends
              (append '((company-math-symbols-latex company-math-symbols-unicode company-latex-commands))
                      company-backends)))
;If you are using AUCTeX you might need to use TeX-mode-hook instead:
(add-hook 'TeX-mode-hook 'my/latex-mode-setup)

But I can't get the same display results represented here, see the following screenshots for more detailed info:

Any hints for this problem will be highly appreciated.

Regards,
HY

[vspinu]

Hi @hongyi-zhao Check your company-backends variables in the buffer. Some other backend might be creeping in or the company-math backends are not installed int he first place.

You can invoke the backend one by one like so M-x company-math-symbols-unicode RET and see if it is triggered correctly.

[hongyi-zhao]

Check your company-backends variables in the buffer.

See the following given by M-x company-diag RET:

You can invoke the backend one by one like so M-x company-math-symbols-unicode RET and see if it is triggered correctly.

I tried with M-x company-math-symbols-unicode RET and M-x company-math-symbols-latex RET, but still failed to obtain the same results as you presented in this repo:

[vspinu]

Your latest screenshot is from company-capf, not from company-math backends. What is the value of company-backends in your tex buffer?

[hongyi-zhao]

M-x describe-variable RET company-backends RET:

I'm currently use auctex, eglot, texlab, and company as the LaTeX document preparation environment. See the full configuration below:

(straight-use-package
 `(auctex :type git :host nil :repo "https://git.savannah.gnu.org/git/auctex.git"
    :pre-build ,(pcase system-type
                (`berkeley-unix '("gmake"))
                (_ '(
                    `("bash" "-c" "cd" ,(straight--repos-dir "auctex"))
                    ("./autogen.sh")
                    ("./configure" "--without-texmf-dir" "--with-lispdir=.") 
                    ("make")
                    )))))

     (setq TeX-data-directory (straight--repos-dir "auctex")
           TeX-lisp-directory TeX-data-directory)                   
    
; Or set the following variable via custom-set-variables in the opened buffer by the following command.
; M-x describe-variable RET preview-TeX-style-dir RET
;`(preview-TeX-style-dir ,(concat ".:" (straight--repos-dir "auctex") "latex:"))
(setq preview-TeX-style-dir (concat ".:" (straight--repos-dir "auctex") "latex:"))

(load "auctex.el" nil t t) 
(load "preview-latex.el" nil t t)

(setq TeX-auto-save t)
(setq TeX-parse-self t)
(setq-default TeX-master nil)

(use-package eglot
  :hook 
  ((TeX-mode . eglot-ensure))
  :config
(add-to-list 'eglot-server-programs
             '((latex-mode tex-mode context-mode texinfo-mode bibtex-mode) . ("texlab"))))

(use-package company
  :custom
  (company-idle-delay 0)
  (company-minimum-prefix-length 1)
  (company-tooltip-align-annotations t)
  (company-dabbrev-downcase nil)
  (company-dabbrev-other-buffers t) ; search buffers with the same major mode
  :bind
  ( :map company-active-map
    ("RET" . nil)
    ([return] . nil)
    ("C-w" . nil)
    ("TAB" . company-complete-selection)
    ("<tab>" . company-complete-selection)
    ("C-s" . company-complete-selection)  ; Mostly to use during yasnippet expansion
    ("C-n" . company-select-next)
    ("C-p" . company-select-previous))
  :hook
  ;(dashboard-after-initialize . global-company-mode)
  ; https://emacs.stackexchange.com/questions/39256/how-to-avail-of-hook-using-use-package
  (after-init . global-company-mode)
  :config
  (add-to-list 'company-begin-commands 'backward-delete-char-untabify))


(use-package company-math)
;; local configuration for TeX modes
(defun my/latex-mode-setup ()
  (setq-local company-backends
              (append '((company-math-symbols-latex company-math-symbols-unicode company-latex-commands))
                      company-backends)))
;If you are using AUCTeX you might need to use TeX-mode-hook instead:
(add-hook 'TeX-mode-hook 'my/latex-mode-setup)

[vspinu]

As expected, your configuration is not being triggered. Try tex-mode-hook. The tex/auctex hookup was always a mystery to me.

[hongyi-zhao]

No, tex-mode-hook can't activate lsp like TeX-mode-hook.

[hongyi-zhao]

I've figured out a workable configuration as shown here. So close this issue for now.