[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#17836: 24.3; `describe-fontset' confused about e.g. ?\C-@
From: |
Lars Ingebrigtsen |
Subject: |
bug#17836: 24.3; `describe-fontset' confused about e.g. ?\C-@ |
Date: |
Sun, 03 Nov 2019 17:34:39 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Samuel Bronson <naesten@gmail.com> writes:
> When I use `describe-fontset', I get output that starts out something
> like:
>
> Fontset:
> -misc-fixed-medium-r-semicondensed--13-*-*-*-*-*-fontset-xterm.default
> CHAR RANGE (CODE RANGE)
> FONT NAME (REQUESTED and [OPENED])
> C-@ .. � (#x43 .. #x10FFFF)
> -Misc-Fixed-medium-r-semicondensed--13-*-75-75-c-120-ISO10646-1
>
> Notice how #x43 is NOT a representation of `?\C-@' but, in fact, of
> `?C'? That's fairly strange bug. (Why would you try to extract the
> codepoints AFTER formatting the range as a string ...?)
Weirdly enough, I'm not able to reproduce this bug reliably. Sometimes
I get
Fontset: -PfEd-DejaVu Sans
Mono-normal-normal-normal-*-25-*-*-*-m-0-fontset-startup
CHAR RANGE (CODE RANGE)
FONT NAME (REQUESTED and [OPENED])
C-@ .. DEL
-*-*-*-*-*-*-*-*-*-*-*-*-iso10646-1
(i.e., without the hex range) and sometimes I get
Fontset: -PfEd-DejaVu Sans
Mono-normal-normal-normal-*-25-*-*-*-m-0-fontset-startup
CHAR RANGE (CODE RANGE)
FONT NAME (REQUESTED and [OPENED])
C-@ .. <REMOVED> (#x43 .. #x3FFF7F)
-*-*-*-*-*-*-*-*-*-*-*-*-iso10646-1
Hm... Oh, the first time I run the command in a fresh Emacs, I get the
latter? Perhaps displaying the buffer loaded a bunch of fonts that then
made this first (large) range go away?
Anyway, it seems like this bug is still present in Emacs 27, and there's
possibly a new bug, too, with not displaying the hex values in some
instances.
Eli did pinpoint what the reason for the original bug was, though:
> That's because print-fontset-element does this:
>
> (beginning-of-line)
> (let ((from (following-char))
>
> IOW, it assumes that there's a single character there, not a
> human-readable description of a character, such as "C-@".
>
> How about submitting a patch that uses 'kbd', say?
I'll take a whack at implementing that.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- bug#17836: 24.3; `describe-fontset' confused about e.g. ?\C-@,
Lars Ingebrigtsen <=