Re: texinfo-fill-workaround.el -- no break after @: when filling

Re: texinfo-fill-workaround.el -- no break after @: when filling

[Kevin Ryde]

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Stefan Monnier <monnier@iro.umontreal.ca> writes (in gnu-emacs-sources):
>
> I'd point out that fill-nobreak-predicate is a hook in recent
> versions of Emacs

I notice the manual still only says nil or a function.  Perhaps
something like the following (new text for ease of reading, diff
below),


   The variable `fill-nobreak-predicate' is a hook (an abnormal hook,
*note Hooks::) specifying additional conditions where line-breaking is
not allowed.  Each function is called with no arguments and should
return a non-`nil' value if point is not a good place to break the
line.  Two standard functions you can use are
`fill-single-word-nobreak-p' (don't break after the first word of a
sentence or before the last) and `fill-french-nobreak-p' (don't break
after `(' or before `)', `:' or `?').


2005-08-27  Kevin Ryde  <user42@zip.com.au>

        * text.texi (Fill Commands): fill-nobreak-predicate is now a hook.


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Index: text.texi
===================================================================
RCS file: /cvsroot/emacs/emacs/man/text.texi,v
retrieving revision 1.57
diff -u -c -r1.57 text.texi
cvs server: conflicting specifications of output style
*** text.texi	15 Aug 2005 01:47:46 -0000	1.57
--- text.texi	29 Aug 2005 23:18:40 -0000
***************
*** 577,587 ****
  @code{t} to tell the sentence commands that a period is not necessary.
  
  @vindex fill-nobreak-predicate
!   The variable @code{fill-nobreak-predicate} specifies additional
! conditions for where line-breaking is allowed.  Its value is either
! @code{nil} or a Lisp function; the function is called with no
! arguments, and if it returns a non-@code{nil} value, then point is not
! a good place to break the line.  Two standard functions you can use are
  @code{fill-single-word-nobreak-p} (don't break after the first word of
  a sentence or before the last) and @code{fill-french-nobreak-p} (don't
  break after @samp{(} or before @samp{)}, @samp{:} or @samp{?}).
--- 577,587 ----
  @code{t} to tell the sentence commands that a period is not necessary.
  
  @vindex fill-nobreak-predicate
!   The variable @code{fill-nobreak-predicate} is a hook (an abnormal
! hook, @pxref{Hooks}) specifying additional conditions where
! line-breaking is not allowed.  Each function is called with no
! arguments and should return a non-@code{nil} value if point is not a
! good place to break the line.  Two standard functions you can use are
  @code{fill-single-word-nobreak-p} (don't break after the first word of
  a sentence or before the last) and @code{fill-french-nobreak-p} (don't
  break after @samp{(} or before @samp{)}, @samp{:} or @samp{?}).

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Re: texinfo-fill-workaround.el -- no break after @: when filling

[Richard M. Stallman]

    > I'd point out that fill-nobreak-predicate is a hook in recent
    > versions of Emacs

    I notice the manual still only says nil or a function.  Perhaps
    something like the following (new text for ease of reading, diff
    below),

Your patch looks good.  Would someone please install it?

But it suggests that maybe we should also rename the variable to
fill-nobreak-predicates.

Re: texinfo-fill-workaround.el -- no break after @: when filling

[Kevin Ryde]

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"Richard M. Stallman" <rms@gnu.org> writes:
>
> Your patch looks good.  Would someone please install it?

This was from a while ago, it never got installed.  Re-diffed below
for the current cvs and with the wording tweaked a bit (for less
change actually):

       The variable `fill-nobreak-predicate' is a hook (an abnormal hook,
    *note Hooks::) specifying additional conditions where line-breaking is
    not allowed.  Each function is called with no arguments, with point at
    a place where Emacs is considering breaking the line.  If a function
    returns a non-`nil' value, then that's a bad place to break the line.
    Two standard functions you can use are `fill-single-word-nobreak-p'
    (don't break after the first word of a sentence or before the last) and
    `fill-french-nobreak-p' (don't break after `(' or before `)', `:' or
    `?').

2006-04-07  Kevin Ryde  <user42@zip.com.au>

        * text.texi (Fill Commands): fill-nobreak-predicate is now a hook.


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*** text.texi.~1.63.~	2006-04-07 09:29:56.000000000 +1000
--- text.texi	2006-04-07 09:32:20.000000000 +1000
***************
*** 557,567 ****
  fill commands put two spaces after a colon.
  
  @vindex fill-nobreak-predicate
!   The variable @code{fill-nobreak-predicate} specifies additional
! conditions for where line-breaking is allowed.  Its value is either
! @code{nil} or a Lisp function; the function is called with no
  arguments, with point at a place where Emacs is considering breaking
! the line.  If the function returns a non-@code{nil} value, then that's
  a bad place to break the line.  Two standard functions you can use are
  @code{fill-single-word-nobreak-p} (don't break after the first word of
  a sentence or before the last) and @code{fill-french-nobreak-p} (don't
--- 557,567 ----
  fill commands put two spaces after a colon.
  
  @vindex fill-nobreak-predicate
!   The variable @code{fill-nobreak-predicate} is a hook (an abnormal
! hook, @pxref{Hooks}) specifying additional conditions where
! line-breaking is not allowed.  Each function is called with no
  arguments, with point at a place where Emacs is considering breaking
! the line.  If a function returns a non-@code{nil} value, then that's
  a bad place to break the line.  Two standard functions you can use are
  @code{fill-single-word-nobreak-p} (don't break after the first word of
  a sentence or before the last) and @code{fill-french-nobreak-p} (don't

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Re: texinfo-fill-workaround.el -- no break after @: when filling

[Stefan Monnier]

> and a similarly tiny function for no break after <a in html "<a href",
> which I think much improves human readability
> 	http://www.emacswiki.org/cgi-bin/wiki/HtmlMode

In Emacs-22, this is already done for all tags:

   (defun sgml-fill-nobreak ()
     ;; Don't break between a tag name and its first argument.
     (save-excursion
       (skip-chars-backward " \t")
       (and (not (zerop (skip-syntax-backward "w_")))
            (skip-chars-backward "/?!")
            (eq (char-before) ?<))))

Only problem is that with <a href="..." the URL is often so long that the
space between <a and href is the only space on the line so fill.el ignores
fill-nobreak-predicate.


        Stefan