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Re: toggle-variable-pitch

From: Thien-Thi Nguyen
Subject: Re: toggle-variable-pitch
Date: Thu, 19 Sep 2013 10:04:16 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)

() Thien-Thi Nguyen <address@hidden>
() Thu, 19 Sep 2013 07:30:15 +0200

   Here is a command that toggles ‘variable-pitch’ face:

   (defun toggle-variable-pitch () ...)

Ah, the dangers of pre-caffeine posting.  It turns out that
this command reimplements ‘buffer-face-mode’, poorly.  It is
poor because invocation though a key sequence (after binding)
does not immediately update the screen, as does invocation
via ‘M-x’.  The difference is a call to ‘force-window-update’.

So, to try to show that even an Ignorant Fool can improve,
here is the revised command, now suitable for keybinding:

(defun toggle-variable-pitch ()
  "Toggle use of face `variable-pitch'.
This works by frobbing `face-remapping-alist'."
  (let ((spec '(default variable-pitch)))
    (set (make-local-variable 'face-remapping-alist)
         (if (member spec face-remapping-alist)
             (delete spec face-remapping-alist)
           (cons spec face-remapping-alist))))
  (force-window-update (current-buffer)))

BTW, the other difference is this command does not sully
the mode line w/ a camel-case minor mode "lighter", a Very
Important consideration from a certain aesthetic POV... :-D

Thien-Thi Nguyen
   GPG key: 4C807502
   (if you're human and you know it)
      read my lisp: (responsep (questions 'technical)
                               (not (via 'mailing-list)))
                     => nil

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