From: Akib Azmain Turja via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: gerd.moellmann@gmail.com, 57607@debbugs.gnu.org
Subject: bug#57607: Feature request: Use the character cell on bottom-right corner of a terminal
Date: Fri, 07 Oct 2022 19:10:08 +0600 [thread overview]
Message-ID: <87r0zj93v3.fsf@disroot.org> (raw)
In-Reply-To: <83o7urvjdz.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 04 Oct 2022 15:54:48 +0300")
[-- Attachment #1: Type: text/plain, Size: 2162 bytes --]
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Akib Azmain Turja <akib@disroot.org>
>> Cc: 57607@debbugs.gnu.org, gerd.moellmann@gmail.com
>> Date: Tue, 04 Oct 2022 18:00:57 +0600
>>
>> > Please try with some 2-column CJK characters, I'm not sure the example
>> > with ^L is relevant here. You can find the list of wide characters in
>> > characters.el (search for "width"); for example, characters in the
>> > U+FF00 block can be useful.
>>
>> Thanks, "CJK STROKE D" doesn't work as expected, and the result depends
>> on terminal in use. How can I determine the width of a glyph?
>
> Like this:
>
> (char-width CHAR)
>
> where CHAR is the character you are interested in. For example:
>
> (char-width #x31D4)
> => 2
>
> From C, you can call char_width, like Fchar_width (which see) does.
>
> One other subtle point: the argument STRING to tty_write_glyphs is a
> string of 'struct glyph' objects, not a string of characters. Each
> struct glyph has the code of the character to display in its u.ch
> member, if the glyph is a simple character glyph; for the full story
> see encode_terminal_code.
Thanks.
I just discovered new type of glyph: padding glyph. What's this? Is
this a nop glyph? I guess it's used to make string of width N use N
numbers of glyph. But how? Is this like [CJK PAD] or [PAD CJK]?
>
>> > (And the existing code could have bugs,
>> > no need to assume it is always correct.)
>>
>> Yes, it can, but in most cases, my brain has more bugs.
>
> Indeed, that the existing code has bugs should not be our first
> hypothesis. But it shouldn't be axiomatic that there are no bugs
> there ;-)
>
>> > face_id is an integer, and zero is a valid value (it means the default
>> > face), so NULL won't do. But you can use -1 to mean "no face ID".
>> > Just make sure you never pass it to FACE_FROM_ID etc.
>> >
>> > Thanks.
>>
>> OK, I'll try that. Thanks.
>
> TIA
--
Akib Azmain Turja
Find me on Mastodon at @akib@hostux.social.
This message is signed by me with my GnuPG key. Its fingerprint is:
7001 8CE5 819F 17A3 BBA6 66AF E74F 0EFA 922A E7F5
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]
next prev parent reply other threads:[~2022-10-07 13:10 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-03 17:39 Why Emacs doesn't touch the bottom-right corner of terminal Akib Azmain Turja
2022-09-06 6:59 ` bug#57607: Feature request: Use the character cell on bottom-right corner of a terminal Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-06 8:03 ` Gerd Möllmann
2022-09-06 10:07 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-06 12:00 ` Gerd Möllmann
2022-09-06 15:10 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-07 4:58 ` Gerd Möllmann
2022-09-07 12:46 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-07 12:58 ` Gerd Möllmann
2022-09-07 15:39 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-07 17:26 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-08 5:49 ` Gerd Möllmann
2022-09-08 11:28 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-08 12:35 ` Gerd Möllmann
2022-09-08 14:47 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-11 9:00 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-11 10:08 ` Gerd Möllmann
2022-09-11 10:39 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-03 8:31 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-03 19:41 ` Eli Zaretskii
2022-10-04 7:22 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-04 8:07 ` Eli Zaretskii
2022-10-04 12:00 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-04 12:54 ` Eli Zaretskii
2022-10-07 13:10 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2022-10-07 19:30 ` Eli Zaretskii
2022-10-04 13:05 ` Akib Azmain Turja via Bug reports for GNU Emacs, the Swiss army knife of text editors
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87r0zj93v3.fsf@disroot.org \
--to=bug-gnu-emacs@gnu.org \
--cc=57607@debbugs.gnu.org \
--cc=akib@disroot.org \
--cc=eliz@gnu.org \
--cc=gerd.moellmann@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.