Re: master fb4f2aa038: * lisp/textmodes/paragraphs.el (repunctuate-sentences-filter): New function.

[Juri Linkov <juri@jurta.org>]

>> +(defun repunctuate-sentences-filter (_start _end)
>> +  "Search filter used by `repunctuate-sentences' to skip unneeded spaces.
>> +By default, it skips occurrences that already have two spaces.
>> +It is advised to put `advice-add' on this function to add more filters,
>> +for example, `(looking-back (rx (or \"e.g.\" \"i.e.\") \" \") 5)'
>> +with a set of predefined abbreviations to skip from adding two spaces."
>> +  (not (length= (match-string 4) 2)))
>
> Similarly to filter-buffer-substring-function, I believe it would be
> better if this was a variable, on which 'add-function' could be used.
> This would make it easier to set buffer locally if needed.

Thanks, good idea.  Then, for example,

#+begin_src emacs-lisp
  (add-function :after-while (local 'repunctuate-sentences-filter)
                  (lambda (start end)
                    (not (looking-back (rx (or "e.g." "i.e.") " ") 5))))
#+end_src

will be possible with:

diff --git a/lisp/textmodes/paragraphs.el b/lisp/textmodes/paragraphs.el
index fc10a0dd1b..e3b5ecbcca 100644
--- a/lisp/textmodes/paragraphs.el
+++ b/lisp/textmodes/paragraphs.el
@@ -487,6 +487,8 @@ repunctuate-sentences-filter
 with a set of predefined abbreviations to skip from adding two spaces."
   (not (length= (match-string 4) 2)))
 
+(defvar repunctuate-sentences-filter #'repunctuate-sentences-filter)
+
 (defun repunctuate-sentences (&optional no-query start end)
   "Put two spaces at the end of sentences from point to the end of buffer.
 It works using `query-replace-regexp'.  In Transient Mark mode,
@@ -507,10 +509,10 @@ repunctuate-sentences
       (unwind-protect
           (progn
             (add-function :after-while isearch-filter-predicate
-                          #'repunctuate-sentences-filter)
+                          repunctuate-sentences-filter)
             (query-replace-regexp regexp to-string nil start end))
         (remove-function isearch-filter-predicate
-                         #'repunctuate-sentences-filter)))))
+                         repunctuate-sentences-filter)))))
 
--