Path: utzoo!attcan!uunet!ogicse!uwm.edu!lll-winken!sun-barr!newstop!sun!amdahl!JUTS!kpc00
From: kpc00@ccc.amdahl.com (Kimball P Collins)
Newsgroups: comp.emacs
Subject: Re: %% vs. @@
Message-ID: <8fbY022v01fw01@JUTS.ccc.amdahl.com>
Date: 28 Jun 90 04:03:49 GMT
References: <87.P022y01JM01@JUTS.ccc.amdahl.com> <1990Jun27.145013.29422@talos.pm.com>
Reply-To: kpc00@JUTS.uts.amdahl.com (Kimball P Collins)
Organization: Amdahl Corporation, Sunnyvale CA
Lines: 32

In article <1990Jun27.145013.29422@talos.pm.com> kjones@talos.pm.com (Kyle Jones) writes:
>You'll need to do a bit more than just toggle buffer-offer-save.
>Emacs will ask to save any buffer that has a filename associated
>with it (via buffer-file-name).  So your toggle function will
>need to set/reset the value of buffer-file-name for file buffers.

Quite right.  I ended up writing (toggle-buffer-saveable) (perhaps
"-saveability" would be a better name since there is no associated
Boolean variable).

I did not implement an alist to be able to restore the original file
name since it would potentially get messy when set-visited-file-name
or rename-buffer happen before one toggles saveability back on, etc.
A Boolean variable for saveability in emacs might be a nice change to
have for version 19.

>
>Try this:
>
>(setq-default mode-line-modified
>	      (cons '(buffer-file-name "----"
>		      (buffer-offer-save "----" "--@@"))
>		    mode-line-modified))

Thanks very much.  The above setq-default seems to work fine, but I
wonder about the purpose of purecopy in the loaddefs.el defconst for
this variable.  Can it be set without overwriting memory anyplace?
Would it be beneficial to defconst the variable again?

--

Neither representing Amdahl nor necessarily myself.