GNU bug report logs - #72309
propertized-buffer-identification with maximum width

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Message #49 received at 72309 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Heime <heimeborgia <at> protonmail.com>
Cc: 72309 <at> debbugs.gnu.org
Subject: Re: bug#72309: propertized-buffer-identification with maximum width
Date: Sun, 28 Jul 2024 15:29:21 +0300

> Date: Sun, 28 Jul 2024 12:18:32 +0000
> From: Heime <heimeborgia <at> protonmail.com>
> Cc: Eli Zaretskii <eliz <at> gnu.org>, 72309 <at> debbugs.gnu.org
> 
> > > > What is the big problem of showing how to implement this, buffer name
> > > > with truncation ellipses using mode-line-buffer-identification ?
> > > 
> > > We don't have people here whose job is to write code for others. This
> > > is a volunteer-based project, where people help you with ideas, but
> > > the actual job of writing and debugging the code is yours.
> > > 
> > > So please take the ideas, read the documentation, and work on the
> > > implementation you want. If you have questions about the
> > > implementation, please ask them on help-gnu-emacs, which is where
> > > user-level help should be sought.
>  
> The implementations do not work.  
> 
> For instance, using 
> 
> (name (buffer-name))
> 
> or with 
> 
> (buffer-name (window-buffer))
> 
> See
> 
> (setq-default mode-line-buffer-identification
>   (propertized-buffer-identification
>     (format " %s "
>       (let ( (name (buffer-name)) )
>          (if (> (length name) wmax)
>          (concat (substring name 0 (- wmax 3)) "...")
>          name))))) )
> 
> And neither does this
> 
>   (let* ( (bfname (buffer-name (window-buffer)))
>           (tkname (if (> (length bfname) wmax)
>                       (truncate-string-to-width bfname wmax nil nil "...")
>                     bfname)))
>     (propertized-buffer-identification (format " %s " tkname))))
> 
> So there is no option other than using %b, where one has no control about
> how it gets displayed. 

Your conclusions are wrong.

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