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Re: How do I initialize globalized minor mode only once?
From: |
Barry Margolin |
Subject: |
Re: How do I initialize globalized minor mode only once? |
Date: |
Tue, 10 Jul 2012 23:20:12 -0400 |
User-agent: |
MT-NewsWatcher/3.5.3b3 (Intel Mac OS X) |
In article <mailman.4534.1341975266.855.help-gnu-emacs@gnu.org>,
Dmitry Gutov <dgutov@yandex.ru> wrote:
> Hi all,
>
> I have written a globalized minor mode which has a relatively costly
> initialization (external process call), which I need to do when the mode
> is enabled.
>
> But the turn-on function is getting called twice for each new opened
> buffer, once in default major mode, and once in the final major mode.
>
> What's the best way to turn on the minor mode only once?
> Currently I'm comparing major-mode value to the default value, but
> that's probably not the best solution, since the minor mode in question
> can apply to some fundamental-mode (or other default mode) buffers, too.
Why not just set a variable saying whether you've done the
initialization:
(defvar *my-mode-initialized* nil)
...
(if (not *my-mode-initialized*)
(progn
...
(setq *my-mode-initialized* t)))
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***