Commit 96de0503 authored by Marcin Borkowski's avatar Marcin Borkowski

Merge branch 'fix/bug-20871-cur'

parents 109da684 52147098
......@@ -637,8 +637,11 @@ line. If a function returns a non-@code{nil} value, Emacs will not
break the line there. Functions you can use there include:
@code{fill-single-word-nobreak-p} (don't break after the first word of
a sentence or before the last); @code{fill-single-char-nobreak-p}
(don't break after a one-letter word); and @code{fill-french-nobreak-p}
(don't break after @samp{(} or before @samp{)}, @samp{:} or @samp{?}).
(don't break after a one-letter word preceded by a whitespace
character); @code{fill-french-nobreak-p} (don't break after @samp{(}
or before @samp{)}, @samp{:} or @samp{?}); and
@code{fill-polish-nobreak-p} (don't break after a one letter word,
even if preceded by a non-whitespace character).
@node Fill Prefix
@subsection The Fill Prefix
......@@ -75,6 +75,11 @@ detect built-in libxml support, instead of testing for that
indirectly, e.g., by checking that functions like
'libxml-parse-html-region' return nil.
** New function 'fill-polish-nobreak-p', to be used in 'fill-nobreak-predicate'.
It blocks line breaking after a one-letter word, also in the case when
this word is preceded by a non-space, but non-alphanumeric character.
* Editing Changes in Emacs 27.1
......@@ -340,6 +340,18 @@ places."
(and (memq (preceding-char) '(?\t ?\s))
(eq (char-syntax (following-char)) ?w)))))))
(defun fill-polish-nobreak-p ()
"Return nil if Polish style allows breaking the line at point.
This function may be used in the `fill-nobreak-predicate' hook.
It is almost the same as `fill-single-char-nobreak-p', with the
exception that it does not require the one-letter word to be
preceded by a space. This blocks line-breaking in cases like
\"(a jednak)\"."
(skip-chars-backward " \t")
(backward-char 2)
(looking-at "[^[:alpha:]]\\cl")))
(defun fill-single-char-nobreak-p ()
"Return non-nil if a one-letter word is before point.
This function is suitable for adding to the hook `fill-nobreak-predicate',
;;; fill-test.el --- ERT tests for fill.el -*- lexical-binding: t -*-
;; Copyright (C) 2017 Free Software Foundation, Inc.
;; Author: Marcin Borkowski <>
;; Keywords: text, wp
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <>.
;;; Commentary:
;; This package defines tests for the filling feature, specifically
;; the `fill-polish-nobreak-p' function.
;;; Code:
(require 'ert)
(ert-deftest fill-test-no-fill-polish-nobreak-p nil
"Tests of the `fill-polish-nobreak-p' function."
(insert "Abc d efg (h ijk).")
(setq fill-column 8)
(setq-local fill-nobreak-predicate '())
(should (string= (buffer-string) "Abc d\nefg (h\nijk).")))
(insert "Abc d efg (h ijk).")
(setq fill-column 8)
(setq-local fill-nobreak-predicate '(fill-polish-nobreak-p))
(should (string= (buffer-string) "Abc\nd efg\n(h ijk)."))))
(provide 'fill-tests)
;;; fill-tests.el ends here
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