Add reference preview for markdown mode

[bdarcus]

Would citar be the right package to include a feature like RefTeX's citation info, i.e. to display the reference of a citekey at point in the echo area?

Originally posted by @tillheilmann in #856

[aikrahguzar]

The standard Emacs interface for this kind of thing is eldoc.

My config has this in it,

(defun +citar-eldoc (callback)
    (when-let ((key (citar-key-at-point)))
      (funcall callback (citar-format-reference `(,key)) :thing key)))

  (add-hook 'LaTeX-mode-hook
            (defun +latex-eldoc ()
              (add-hook 'eldoc-documentation-functions #'+citar-eldoc nil t)
              (eldoc-mode)))

[bdarcus]

Does the above work for you @tillheilmann?

[tillheilmann]

Excellent, @aikrahguzar, thank you very much! This, i.e. eldoc, is the exact kind of solution I did not know but hoped would exist. (As you can see, my knowledge of Emacs is still quite basic.) It is, I think, a very neat and elegant thing. Formatting of reference in echo area is not yet perfect (according to my peculiar taste) but I will look into citar-format-reference and see what I can do about that. Thank you, once again!

[tillheilmann]

Ah, I see: I'll have to configure citar-templates for preview, nice, very good.