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Code Issues Releases Activity

Use nobreak-space on all non-ASCII whitespace characters

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* doc/emacs/display.texi (Text Display): Document it.

* src/xdisp.c (get_next_display_element): Use blankp to test whether
to use the nobreak_space face (bug#44236).
This commit is contained in:
Neil Roberts 2020-10-30 13:13:31 +01:00 committed by Lars Ingebrigtsen
parent 02ecbf58e4
commit f018cffca0
3 changed files with 11 additions and 3 deletions
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3
doc/emacs/display.texi
View File

@ -1608,7 +1608,8 @@ can cause problems if they are entered into a buffer without your
realization, e.g., by yanking; for instance, source code compilers
typically do not treat non-@acronym{ASCII} spaces as whitespace
characters. To deal with this problem, Emacs displays such characters
specially: it displays @code{U+00A0} (no-break space) with the
specially: it displays @code{U+00A0} (no-break space) and other
characters from the Unicode horizontal space class with the
@code{nobreak-space} face, and it displays @code{U+00AD} (soft
hyphen), @code{U+2010} (hyphen), and @code{U+2011} (non-breaking
hyphen) with the @code{nobreak-hyphen} face. To disable this, change

6
etc/NEWS
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@ -163,6 +163,12 @@ your init file:
(setq frame-title-format '(multiple-frames "%b"
("" invocation-name "@" system-name)))
+++
** 'nobreak-char-display' now also affects all non-ASCII space characters.
Previously, this was limited only to NO-BREAK-SPACE and hyphen
characters. Now it also covers the rest of the non-ASCII Unicode
space characters.
* Editing Changes in Emacs 28.1

5
src/xdisp.c
View File

@ -7555,7 +7555,7 @@ get_next_display_element (struct it *it)
non-ASCII spaces and hyphens specially. */
if (! ASCII_CHAR_P (c) && ! NILP (Vnobreak_char_display))
{
if (c == NO_BREAK_SPACE)
if (blankp (c))
nonascii_space_p = true;
else if (c == SOFT_HYPHEN || c == HYPHEN
|| c == NON_BREAKING_HYPHEN)
@ -34747,7 +34747,8 @@ If the value is t, Emacs highlights non-ASCII chars which have the
same appearance as an ASCII space or hyphen, using the `nobreak-space'
or `nobreak-hyphen' face respectively.
U+00A0 (no-break space), U+00AD (soft hyphen), U+2010 (hyphen), and
All of the non-ASCII characters in the Unicode horizontal whitespace
character class, as well as U+00AD (soft hyphen), U+2010 (hyphen), and
U+2011 (non-breaking hyphen) are affected.
Any other non-nil value means to display these characters as an escape