* bug#31588: 26.1; format counts some Unicode characters as two
@ 2018-05-25 0:36 James P. Ascher
2018-05-25 0:50 ` Noam Postavsky
0 siblings, 1 reply; 4+ messages in thread
From: James P. Ascher @ 2018-05-25 0:36 UTC (permalink / raw)
To: 31588
I've exhausted my ability to debug this one, having ended up in the
C source code, which is a bit beyond me. I reproduced it with 'emacs
-Q' the following way:
1: Write a dozen x's, i.e. "xxxxxxxxxxxx" on *scratch*.
2: Move pointer to the middle of the line somewhere.
3: M-S-: and call (insert (format "%-2s" '➖))
What I expected:
xxxxx➖ xxxxxxxx
What results:
xxxxxx➖xxxxxxx
In comparison, (insert (format "%-2s" 'z)) gives:
xxxxxxz xxxxxx
And, (insert (format "%-3s" '➖z)) gives:
xxxxxx➖zxxxxxx
The same problem occurs on my setup with ❌ (CROSS MARK).
However, these Unicode items characters work as I expect: ▶ (BLACK
RIGHT-POINTING TRIANGLE), ✚ (HEAVY GREEK CROSS), ▷ (WHITE RIGHT-POINTING
TRIANGLE), and ◼ (BLACK MEDIUM SQUARE).
As far as I can tell, something is off about the styled_format and how
it counts characters- I suspect something about counting
multibyte characters, but it's a little beyond me.
I observed this bug while trying to fix a bug comes from the headers
display of the mu4e package where the overlays that show a deleted flag
are one character too narrow, which displays it incorrectly.
I'm happy to give more info or try other things. Thanks for all your
hard work on Emacs and I hope this is helpful!
Respectfully submitted,
-James
***The below is NOT my Emacs -Q session, but I left it in case it's
useful***
In GNU Emacs 26.1 (build 1, x86_64-apple-darwin17.5.0, NS appkit-1561.40 Version 10.13.4 (Build 17E202))
of 2018-05-17 built on Grumpys-MacBook.local
Windowing system distributor 'Apple', version 10.3.1561
Recent messages:
find-function-C-source: The C source file editfns.c is not available
Note: file is write protected
Mark saved where search started
Quit
nil
Quit
Entering debugger...
Back to top level
Entering debugger...
Back to top level
nil [3 times]
Configured using:
'configure --disable-dependency-tracking --disable-silent-rules
--enable-locallisppath=/usr/local/share/emacs/site-lisp
--infodir=/usr/local/Cellar/emacs/26.1-rc1/share/info/emacs
--prefix=/usr/local/Cellar/emacs/26.1-rc1 --without-x --with-xml2
--without-dbus --with-gnutls --with-imagemagick --with-rsvg
--without-pop --with-ns --disable-ns-self-contained'
Configured features:
JPEG RSVG IMAGEMAGICK NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS
NS THREADS LCMS2
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: C/*l
Minor modes in effect:
shell-dirtrack-mode: t
helm-mode: t
helm-descbinds-mode: t
async-bytecomp-package-mode: t
yas-global-mode: t
yas-minor-mode: t
beacon-mode: t
global-diff-hl-mode: t
diff-hl-mode: t
diff-auto-refine-mode: t
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anzu-mode: t
volatile-highlights-mode: t
save-place-mode: t
savehist-mode: t
show-smartparens-global-mode: t
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global-auto-revert-mode: t
on-screen-global-mode: t
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cl-old-struct-compat-mode: t
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buffer-read-only: t
size-indication-mode: t
column-number-mode: t
line-number-mode: t
global-visual-line-mode: t
visual-line-mode: t
transient-mark-mode: t
abbrev-mode: t
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/Users/james/.emacs.d/elpa/org-20171225/org-macro hides /usr/local/Cellar/emacs/26.1-rc1/share/emacs/26.1/lisp/org/org-macro
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Features:
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base64 format env code-pages mule custom widget hashtable-print-readable
backquote kqueue cocoa ns lcms2 multi-tty make-network-process emacs)
Memory information:
((conses 16 726503 287766)
(symbols 48 60406 16)
(miscs 40 1370 5657)
(strings 32 182852 46734)
(string-bytes 1 6300425)
(vectors 16 90528)
(vector-slots 8 1357542 342774)
(floats 8 578 1489)
(intervals 56 2034 1087)
(buffers 992 28))
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#31588: 26.1; format counts some Unicode characters as two
2018-05-25 0:36 bug#31588: 26.1; format counts some Unicode characters as two James P. Ascher
@ 2018-05-25 0:50 ` Noam Postavsky
2018-05-25 6:37 ` Eli Zaretskii
0 siblings, 1 reply; 4+ messages in thread
From: Noam Postavsky @ 2018-05-25 0:50 UTC (permalink / raw)
To: James P. Ascher; +Cc: 31588
[-- Attachment #1: Type: text/plain, Size: 954 bytes --]
"James P. Ascher" <jpa4q@virginia.edu> writes:
> 3: M-S-: and call (insert (format "%-2s" '➖))
>
> What I expected:
>
> xxxxx➖ xxxxxxxx
>
> What results:
>
> xxxxxx➖xxxxxxx
>
>
> In comparison, (insert (format "%-2s" 'z)) gives:
>
> xxxxxxz xxxxxx
> The same problem occurs on my setup with ❌ (CROSS MARK).
>
> However, these Unicode items characters work as I expect: ▶ (BLACK
> RIGHT-POINTING TRIANGLE), ✚ (HEAVY GREEK CROSS), ▷ (WHITE RIGHT-POINTING
> TRIANGLE), and ◼ (BLACK MEDIUM SQUARE).
>
> As far as I can tell, something is off about the styled_format and how
> it counts characters- I suspect something about counting
> multibyte characters, but it's a little beyond me.
I think it's intended, ➖ and ❌ are wide characters:
(mapcar #'char-width '(?➖ ?❌ ?▶ ?✚ ?▷ ?◼))
;=> (2 2 1 1 1 1)
Although in my current font the width seems to be more like 1.8 or
something.
[-- Attachment #2: screenshot of the characters --]
[-- Type: image/png, Size: 3321 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#31588: 26.1; format counts some Unicode characters as two
2018-05-25 0:50 ` Noam Postavsky
@ 2018-05-25 6:37 ` Eli Zaretskii
2018-06-03 16:29 ` Noam Postavsky
0 siblings, 1 reply; 4+ messages in thread
From: Eli Zaretskii @ 2018-05-25 6:37 UTC (permalink / raw)
To: Noam Postavsky; +Cc: 31588, jpa4q
> From: Noam Postavsky <npostavs@gmail.com>
> Date: Thu, 24 May 2018 20:50:45 -0400
> Cc: 31588@debbugs.gnu.org
>
> > As far as I can tell, something is off about the styled_format and how
> > it counts characters- I suspect something about counting
> > multibyte characters, but it's a little beyond me.
>
> I think it's intended, ➖ and ❌ are wide characters:
>
> (mapcar #'char-width '(?➖ ?❌ ?▶ ?✚ ?▷ ?◼))
> ;=> (2 2 1 1 1 1)
Yes, that's the reason.
> Although in my current font the width seems to be more like 1.8 or
> something.
Unfortunately, the actual width depends on the font, and what's more,
sometimes varies significantly between different fonts. Maybe we
should have a variant of char-width that actually looks at the font
(of course, such a variant will need a window or frame as one of its
arguments).
But with the current state of our support for wide characters, this is
not a bug.
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#31588: 26.1; format counts some Unicode characters as two
2018-05-25 6:37 ` Eli Zaretskii
@ 2018-06-03 16:29 ` Noam Postavsky
0 siblings, 0 replies; 4+ messages in thread
From: Noam Postavsky @ 2018-06-03 16:29 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 31588, jpa4q
close 31588
quit
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Noam Postavsky <npostavs@gmail.com>
>> Date: Thu, 24 May 2018 20:50:45 -0400
>> Cc: 31588@debbugs.gnu.org
>>
>> > As far as I can tell, something is off about the styled_format and how
>> > it counts characters- I suspect something about counting
>> > multibyte characters, but it's a little beyond me.
>>
>> I think it's intended, ➖ and ❌ are wide characters:
>>
>> (mapcar #'char-width '(?➖ ?❌ ?▶ ?✚ ?▷ ?◼))
>> ;=> (2 2 1 1 1 1)
>
> Yes, that's the reason.
>
>> Although in my current font the width seems to be more like 1.8 or
>> something.
>
> Unfortunately, the actual width depends on the font, and what's more,
> sometimes varies significantly between different fonts. Maybe we
> should have a variant of char-width that actually looks at the font
> (of course, such a variant will need a window or frame as one of its
> arguments).
Well, I don't know if format could do anything useful with a non-integer
width anyway.
> But with the current state of our support for wide characters, this is
> not a bug.
Okay, I'm closing this report.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-06-03 16:29 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-05-25 0:36 bug#31588: 26.1; format counts some Unicode characters as two James P. Ascher
2018-05-25 0:50 ` Noam Postavsky
2018-05-25 6:37 ` Eli Zaretskii
2018-06-03 16:29 ` Noam Postavsky
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