From: Kenichi Handa <handa@m17n.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Usage of standard-display-table in MSDOS
Date: Sat, 28 Aug 2010 13:18:02 +0900 [thread overview]
Message-ID: <tl7pqx32ww5.fsf@m17n.org> (raw)
In-Reply-To: <837hjcm9cw.fsf@gnu.org> (message from Eli Zaretskii on Fri, 27 Aug 2010 17:13:51 +0300)
In article <837hjcm9cw.fsf@gnu.org>, Eli Zaretskii <eliz@gnu.org> writes:
> > > "Display characters in the range L to H literally."
> >
> > > The "literally" part is no longer true, is it?
> >
> > What's the meaning of "literally" when a display table
> > element is [#xA0]?
> It means that a literal byte 0xA0 is sent to the terminal.
From which document, can we get that interpretation? The
docstring of buffer-display-table says:
Each element should be a vector of
characters or nil. The value nil means display the character in the
default fashion; otherwise, the characters from the vector are delivered
to the screen instead of the original character.
It only says about "character". Although it doesn't say how
to deliver a character to a terminal, the natural way is to
encode that character by the terminal coding system, or
display that character by the corresponding glyph of a font.
> > Before Emacs 23, the character #xA0 represents the byte
> > 0xA0. But now it is a character representing a Unicode
> > character U+00A0, and #x3FFFA0 is the character representing
> > the byte 0xA0.
> >
> > And, to "display characters literally", we have been encoded
> > characters by the terminal coding system. Before Emacs 23,
> > the encoded result of #xA0 is always the byte 0xA0, but now
> > it depends on the terminal coding system.
> Which means, AFAIU, that "literally" is no longer possible. At least
> in the case of a multibyte buffer.
> What about a unibyte buffer, though? How do we display the characters
> there?
This is the way to display the character #xA0 (in
multibyte-buffer) and the chararacter representing the byte
#xA0 (in both multibyte-buffer and unibyte-buffer) by
sending the byte #xA0 to the terminal .
;; For NBSP (U+00A0)
(aset standard-display-table #xA0
(vector (unibyte-char-to-multibyte #xA0)))
;; For byte #xA0.
(aset standard-display-table (unibyte-char-to-multibyte #xA0)
(vector (unibyte-char-to-multibyte #xA0)))
(set-terminal-coding-sytem 'no-conversion)
(set-safe-terminal-coding-system-internal 'no-conversion)
The last two lines are currently necessary because of a bug
in term.c. I'm going to fix it.
---
Kenichi Handa
handa@m17n.org
next prev parent reply other threads:[~2010-08-28 4:18 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-23 12:44 Usage of standard-display-table in MSDOS Kenichi Handa
2010-08-24 5:34 ` Stephen J. Turnbull
2010-08-24 11:13 ` Ehud Karni
2010-08-24 16:51 ` Eli Zaretskii
2010-08-25 13:04 ` Ehud Karni
2010-08-25 18:09 ` Eli Zaretskii
2010-08-26 15:26 ` Ehud Karni
2010-08-26 16:43 ` Eli Zaretskii
2010-08-27 13:35 ` Ehud Karni
2010-08-27 16:30 ` Eli Zaretskii
2010-08-27 10:24 ` Eli Zaretskii
2010-08-27 11:44 ` Kenichi Handa
2010-08-27 14:13 ` Eli Zaretskii
2010-08-28 4:18 ` Kenichi Handa [this message]
2010-08-28 7:22 ` Eli Zaretskii
2010-08-30 2:24 ` Kenichi Handa
2010-08-30 3:02 ` Eli Zaretskii
2010-09-01 3:21 ` Kenichi Handa
2010-09-01 9:20 ` Ehud Karni
2010-09-01 23:33 ` Ehud Karni
2010-09-02 5:19 ` Eli Zaretskii
2010-09-02 5:20 ` Kenichi Handa
2010-09-04 22:54 ` Ehud Karni
2010-09-06 1:30 ` Kenichi Handa
2010-09-02 12:32 ` Kenichi Handa
2010-09-04 23:32 ` Ehud Karni
2010-09-05 5:30 ` Eli Zaretskii
2010-09-06 5:14 ` Kenichi Handa
2010-08-29 10:16 ` Ehud Karni
2010-08-29 11:21 ` Eli Zaretskii
2010-08-29 11:49 ` Ehud Karni
2010-08-29 13:06 ` Ehud Karni
2010-08-29 13:50 ` Eli Zaretskii
2010-08-29 14:04 ` Eli Zaretskii
2010-09-07 21:11 ` Ehud Karni
2010-09-09 11:57 ` Kenichi Handa
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=tl7pqx32ww5.fsf@m17n.org \
--to=handa@m17n.org \
--cc=eliz@gnu.org \
--cc=emacs-devel@gnu.org \
/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.