GNU bug report logs - #744
nroff-mode auto-fill-mode not on directives

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Kevin Ryde <user42 <at> zip.com.au>
To: bug-gnu-emacs <at> gnu.org
Subject: nroff-mode auto-fill-mode not on directives
Date: Wed, 20 Aug 2008 08:30:41 +1000

[Message part 1 (text/plain, inline)]

In nroff-mode it'd be good if auto-fill-mode didn't fill when you're
entering a long directive line like

    .IP some long line going past your normal fill width ...

Almost always *roff directives have to be a single line.  I struck the
problem with a groff .URL with a long url doubled-up to both display
literally and be clickable in -Thtml.

I've been using the regexp below, which suppresses auto-fill on .IP and
the like, but continues to auto-fill the comment directives (no change)

    .\"    traditional
    .\#    groff extension
    '''    another traditional, apparently

And of course non-directive lines ("." or "'") are still auto-filled
(either ordinary text, or comments starting \" and \#).


2008-08-18  Kevin Ryde  <user42 <at> zip.com.au>

	* textmodes/nroff-mode.el (nroff-mode): Set auto-fill-inhibit-regexp
	so as not to auto-fill on directive lines, other than comment
	directives.

[nroff-mode.el.auto-fill.diff (text/x-diff, attachment)]

[Message part 3 (text/plain, inline)]

-- 
The Copenhagen Interpretation elucidated for the layman:
  You can't be sure until you see for yourself.

Message #10 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Werner LEMBERG <wl <at> gnu.org>
To: user42 <at> zip.com.au, 744 <at> debbugs.gnu.org
Cc: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#744: nroff-mode auto-fill-mode not on directives
Date: Wed, 20 Aug 2008 06:01:53 +0200 (CEST)

> I've been using the regexp below, which suppresses auto-fill on .IP
> and the like, but continues to auto-fill the comment directives (no
> change)
> 
>     .\"    traditional
>     .\#    groff extension

The real groff extension is that `\#' at the beginning of a line
completely removes it:

  This is a
  \# comment
  test.

    -> This is a test.

Auto-fill would be possible for .IP and friends too, provided you end
the line with `\'.

  .IP This is a long title \
  continued on the next line.


      Werner

Message #20 received at 744-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Kevin Ryde <user42 <at> zip.com.au>
Cc: 744-done <at> debbugs.gnu.org
Subject: Re: nroff-mode auto-fill-mode not on directives
Date: Wed, 20 Aug 2008 18:25:01 -0400

> In nroff-mode it'd be good if auto-fill-mode didn't fill when you're
> entering a long directive line

Thanks.  I've checked your patch in.

Message #25 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Kevin Ryde <user42 <at> zip.com.au>
To: Werner LEMBERG <wl <at> gnu.org>
Cc: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#744: nroff-mode auto-fill-mode not on directives
Date: Sat, 23 Aug 2008 10:29:57 +1000

Werner LEMBERG <wl <at> gnu.org> writes:
>
> The real groff extension is that `\#' at the beginning of a line
> completely removes it:

Ah yes, so I guess .\# ends up as another flavour of empty directive.

>   .IP This is a long title \
>   continued on the next line.

I guess you'd definitely want that for very long lines.  Might be a bit
scary doing it all the time though :-).  makefile-mode has a
backslashing fill-paragraph for long variables lines, maybe something
similar could be worked in for a fill of a long directive line ...

Message #30 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Werner LEMBERG <wl <at> gnu.org>
To: user42 <at> zip.com.au
Cc: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#744: nroff-mode auto-fill-mode not on directives
Date: Sat, 23 Aug 2008 07:00:25 +0200 (CEST)

> > The real groff extension is that `\#' at the beginning of a line
> > completely removes it:
> 
> Ah yes, so I guess .\# ends up as another flavour of empty
> directive.

Yep.  No guessing necessary :-)

> >   .IP This is a long title \
> >   continued on the next line.
> 
> I guess you'd definitely want that for very long lines.  Might be a bit
> scary doing it all the time though :-).

Scary?  Why do you think so?

> makefile-mode has a backslashing fill-paragraph for long variables
> lines, maybe something similar could be worked in for a fill of a
> long directive line ...

If you can implement this, please do.  BTW, to check whether
nroff-mode properly supports groff, you might have a look at, say,
`an-old.tmac'.


    Werner

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