Feature request: Replace ascii emoji with unicode in buffer

[tecosaur]

Hello!

I find this package great for viewing emoji in emacs, thre's just one related bit of functionality I'd love to see.
For documents like emails I type in Emacs, I'd love it if my ascii emoji could be converted to unicode emoji in the buffer.
This package already does a brilliant job recognising ascii emoji and displaying them as images, so I'm hoping it wouldn't be too much work to add a minor mode which converts ascii emoji to unicode on-type, or a function that I can use as a hook that perfoms such replacements over the buffer (IMO the first option would be preferable).

Thanks for all the work so far 😀

[tecosaur]

I have tried making such a minor mode, but it's somewhat buggy

(defun emojify--replace-text-with-emoji (orig-fn emoji text buffer start end &optional target)
  "Modify `emojify--propertize-text-for-emoji' to replace ascii/github emoticons with unicode emojis, on the fly."
  (if (or (not emoticon-to-emoji) (= 1 (length text)))
      (funcall orig-fn emoji text buffer start end target)
    (delete-region start end)
    (insert (ht-get emoji "unicode"))))

(define-minor-mode emoticon-to-emoji
  "Write ascii/gh emojis, and have them converted to unicode live."
  :global nil
  :init-value nil
  (if emoticon-to-emoji
      (progn
        (setq-local emojify-emoji-styles '(ascii github unicode))
        (advice-add 'emojify--propertize-text-for-emoji :around #'emojify--replace-text-with-emoji)
        (unless emojify-mode
          (emojify-turn-on-emojify-mode)))
    (setq-local emojify-emoji-styles (default-value 'emojify-emoji-styles))
    (advice-remove 'emojify--propertize-text-for-emoji #'emojify--replace-text-with-emoji)))