Enable Linum Mode for all files (with extension) but not other buffers?

Question

In my init.el file I have the following line: (global-linum-mode 1). I want linum-mode enabled for every file, but not for other buffers. I.e. Is there a way to enable linum mode globally for all buffers with an extension?

Frequently my buffer list looks like

file.js  js2-mode
init.el   Emacs-Lisp
ansi-term Term:

In this case I would like to have it enabled for everything but ansi-term. Is this possible?

Furthermode, just for ansi term I tried the following:

(add-hook 'term-mode-hook (lambda () (linum-mode -1)))

But even that did not work. If someone could tell me why that would be great but enabling it just for files would be ideal.

Thanks

I think a little differently than everyone else, perhaps because I'm not a programmer. Personally, I would set up a regexp function in the initialization of the minor-mode that checks the file extension -- e.g., `buffer-file-name` -- against a list of either desired or excluded file extensions. Depending upon the match or exclusion, I would let the minor-mode continue initializing or deactivate at that point. Here is the regexp function: http://stackoverflow.com/a/20343715/2112489 Perhaps people just don't like modifying the source-code -- a sacred/holy thing -- not sure though. — lawlist, Apr 09 '16 at 05:40

score 7 · Accepted Answer · answered Apr 08 '16 at 11:04

7

Enable Linum Mode for all files [...] but not other buffers?

How about:

(add-hook 'find-file-hook 'linum-mode)

answered Apr 08 '16 at 11:04

phils

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score 5 · Answer 2 · answered Apr 08 '16 at 18:00

5

A solution covering nearly every file would be making use of the fact that nearly all buffers for these are derived from text-mode and prog-mode:

(add-hook 'text-mode-hook 'linum-mode)
(add-hook 'prog-mode-hook 'linum-mode)

answered Apr 08 '16 at 18:00

wasamasa

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score 2 · Answer 3 · answered Apr 08 '16 at 05:16

The linum-off.el file by Matthew Fidler should be what you are looking for.

Here is a copy of his code:

(require 'linum)

(defcustom linum-disabled-modes-list '(eshell-mode wl-summary-mode compilation-mode org-mode text-mode dired-mode doc-view-mode image-mode)
  "* List of modes disabled when global linum mode is on"
  :type '(repeat (sexp :tag "Major mode"))
  :tag " Major modes where linum is disabled: "
  :group 'linum
)
(defcustom linum-disable-starred-buffers 't
  "* Disable buffers that have stars in them like *Gnu Emacs*"
  :type 'boolean
  :group 'linum)

(defun linum-on ()
  "* When linum is running globally, disable line number in modes defined in `linum-disabled-modes-list'. Changed by linum-off. Also turns off numbering in starred modes like *scratch*"

  (unless (or (minibufferp)
              (member major-mode linum-disabled-modes-list)
              (string-match "*" (buffer-name))
              (> (buffer-size) 3000000)) ;; disable linum on buffer greater than 3MB, otherwise it's unbearably slow
    (linum-mode 1)))

(provide 'linum-off)

Enable Linum Mode for all files (with extension) but not other buffers?

3 Answers3

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