Centre Emacs buffer within window

Question

I wrap all my code at 80 columns, and there are times where the Emacs window is wider than 80 columns and there is a lot of unused whitespace on the right side.

I would

Answer 1

As demonstrated here this is indeed possible:

(set-fringe-mode
 (/ (- (frame-pixel-width)
       (* 80 (frame-char-width)))
    2))

However, as I am testing this I seem to have more luck with using margins, at least when also resizing my frame:

(defun my-resize-margins ()
  (let ((margin-size (/ (- (frame-width) 80) 2)))
    (set-window-margins nil margin-size margin-size)))

(add-hook 'window-configuration-change-hook #'my-resize-margins)
(my-resize-margins)