bug#61726: [PATCH] Eglot: Support positionEncoding capability

[Eli Zaretskii]

> From: Augusto Stoffel <arstoffel@gmail.com>
> Cc: joaotavora@gmail.com,  61726@debbugs.gnu.org
> Date: Sat, 25 Feb 2023 15:14:06 +0100
> 
> On Sat, 25 Feb 2023 at 15:47, Eli Zaretskii wrote:
> 
> >> > Can you please humor me and implement eglot-bytewise-column like that?
> >> 
> >> I would be glad to do that, but unfortunately I'd have to ask your
> >> advice as to how to make the corresponding adaptation of
> >> eglot-move-to-bytewise-column.
>          ^^^^^^^

Sorry.  Here:

  (defun eglot-move-to-bytewise-column (column)
    "Move to COLUMN as computed using the LSP `utf-8' criterion."
    (let* ((bol (line-beginning-position))
           (goal-byte (+ (position-bytes bol) column))
           (eol (line-end-position)))
      (goto-char bol)
      (while (and (< (position-bytes (point)) goal-byte)
                  (< (point) eol))
        (if (>= (char-after) #x3fff80)  ; raw bytes take 2 bytes in the buffer
            (setq goal-byte (1+ goal-byte)))
        (forward-char 1))))