fix an auto-complete-mode and linum-mode annoyance

Question

I\'m using auto-complete-mode which I think is totally fantastic. I\'m also a big fan of linum-mode but I\'ve got a very irritating issue when the

Answer 1

I've written a couple of previous answers on modifying the linum-mode output, which you could probably adapt to your purposes.

• Relative Line Numbers In Emacs
• Colorize current line number

Edit: Here's the most basic version of that code (also on EmacsWiki, albeit somewhat buried), which doesn't modify the default output at all, but uses the techniques from those other answers to be more efficient than the default code. That's probably a more useful starting point for you.

(defvar my-linum-format-string "%4d")

(add-hook 'linum-before-numbering-hook 'my-linum-get-format-string)

(defun my-linum-get-format-string ()
  (let* ((width (length (number-to-string
                         (count-lines (point-min) (point-max)))))
         (format (concat "%" (number-to-string width) "d")))
    (setq my-linum-format-string format)))

(setq linum-format 'my-linum-format)

(defun my-linum-format (line-number)
  (propertize (format my-linum-format-string line-number) 'face 'linum))