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[Emacs] Add major mode blacklisting macro

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Ivan Malison 2018-07-14 12:51:22 -07:00
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dotfiles/emacs.d/README.org
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@ -933,6 +933,26 @@ This was stolen from https://github.com/jwiegley/dot-emacs
(imalison:disable-mode-hook nlinum-mode) (imalison:disable-mode-hook nlinum-mode)
(imalison:disable-mode-hook yas-minor-mode) (imalison:disable-mode-hook yas-minor-mode)
#+END_SRC #+END_SRC
** Add a blacklist to a major mode
Sometimes a major mode's syntax highlighting can take a really long time to load
in certain buffers. Usually you can just set a header to tell emacs not to run
the major mode, but for cases where you can't always edit the file ahead of time
this macro allows you to define a blacklist for your major mode that will
prevent the major mode from being enabled on that file.
#+begin_src emacs-lisp
(defmacro imalison:add-blacklist-to-major (major-mode-fn-symbol)
(let ((blacklist-var-symbol (imalison:concat-symbols major-mode-fn-symbol "-blacklist"))
(check-blacklist-symbol (imalison:concat-symbols major-mode-fn-symbol "-check-blacklist")))
`(progn
(defvar ,blacklist-var-symbol nil)
(defun ,check-blacklist-symbol (mode-fn &rest args)
(unless (and (not (equal major-mode (quote ,major-mode-fn-symbol)))
(equal nil args)
(cl-loop for blacklist-regex in ,blacklist-var-symbol
thereis (string-match blacklist-regex (buffer-name))))
(apply mode-fn args)))
(advice-add (quote ,major-mode-fn-symbol) :around (quote ,check-blacklist-symbol)))))
#+end_src
** Other ** Other
The stuff in this section is pretty crusty. I don't think its used anywhere, but The stuff in this section is pretty crusty. I don't think its used anywhere, but
I keep it around just in case I need it. I keep it around just in case I need it.