From: Juri Linkov <juri@jurta.org>
To: Miles Bader <miles@gnu.org>
Cc: David De La Harpe Golden <david@harpegolden.net>,
tzz@lifelogs.com, emacs-devel@gnu.org,
Kenichi Handa <handa@m17n.org>
Subject: Re: inputting characters by hexadigit
Date: Sun, 20 Jul 2008 23:28:59 +0300 [thread overview]
Message-ID: <87r69oqojm.fsf@jurta.org> (raw)
In-Reply-To: <873am6rb8k.fsf@jurta.org> (Juri Linkov's message of "Sat, 19 Jul 2008 03:27:55 +0300")
> The patch below now provides the following variants:
>
> C-q #x2323
> C-q #o21443
> C-q #b0010001100100011
> C-q #d8995
>
> However, I'm not sure about #d8995. It is non-standard syntax where read
> fails with (invalid-read-syntax "#"). The standard syntax for decimal is
> without hash notation. This suggests using `C-q 8995'. But this means
> changing read-quoted-char-radix default to 10!
>
> Anyway, this patch also provides `C-q U2323' syntax that is mnemonic
> for everyone accustomed to U+ syntax.
>
> And another convenience is `C-q # RET' where after typing RET it reads a
> code point or Unicode name in the minibuffer.
It seems better to support all Emacs Lisp notations including both
leading characters `#' and `?':
#b101100 => 44
#o54 => 44
#x2c => 44
#24r1k => 44
?\012 => 10 ?\t => 9 ?\C-j => 10
?\101 => 65 ?A => 65 ?\v => 11
?\f => 12 ?\r => 13 ?\e => 27
?\s => 32 ?\\ => 92 ?\d => 127
?\uNNNN
The patch below simply uses `read' to read a character from the entered
string. It also prepends `?' when the string begins with `\' thus allowing
to input Unicode code points using `C-q \uNNNN'.
Index: lisp/subr.el
===================================================================
RCS file: /sources/emacs/emacs/lisp/subr.el,v
retrieving revision 1.601
diff -u -r1.601 subr.el
--- lisp/subr.el 27 Jun 2008 02:13:36 -0000 1.601
+++ lisp/subr.el 20 Jul 2008 20:28:29 -0000
@@ -1721,7 +1721,7 @@
The optional argument PROMPT specifies a string to use to prompt the user.
The variable `read-quoted-char-radix' controls which radix to use
for numeric input."
- (let ((message-log-max nil) done (first t) (code 0) char translated)
+ (let ((message-log-max nil) done (first t) (code 0) char translated string)
(while (not done)
(let ((inhibit-quit first)
;; Don't let C-h get the help message--only help function keys.
@@ -1753,6 +1753,19 @@
;; Turn a meta-character into a character with the 0200 bit set.
(setq code (logior (logand translated (lognot ?\M-\^@)) 128)
done t))
+ ((and first (memq translated '(?# ?? ?\\)))
+ (setq string (char-to-string translated))
+ (and prompt (setq prompt (message "%s %c" prompt translated))))
+ (string
+ (if (eq translated ?\C-m)
+ (setq done t code
+ (if (eq (length string) 1)
+ (read-char-by-name "Unicode (hex or name): ")
+ (setq code (read (if (eq (aref string 0) ?\\)
+ (concat "?" string)
+ string)))))
+ (setq string (concat string (char-to-string translated)))
+ (and prompt (setq prompt (message "%s %c" prompt translated)))))
((and (<= ?0 translated) (< translated (+ ?0 (min 10 read-quoted-char-radix))))
(setq code (+ (* code read-quoted-char-radix) (- translated ?0)))
(and prompt (setq prompt (message "%s %c" prompt translated))))
--
Juri Linkov
http://www.jurta.org/emacs/
next prev parent reply other threads:[~2008-07-20 20:28 UTC|newest]
Thread overview: 160+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-15 17:41 describe-char should display the character's Unicode name Ted Zlatanov
2008-07-15 20:42 ` Juri Linkov
2008-07-16 2:29 ` Kenichi Handa
2008-07-17 0:35 ` Juri Linkov
2008-07-17 1:26 ` Kenichi Handa
2008-07-17 14:09 ` Ted Zlatanov
2008-07-17 23:40 ` Juri Linkov
2008-07-18 0:10 ` Miles Bader
2008-07-18 0:47 ` inputting characters by hexadigit Kenichi Handa
2008-07-18 0:54 ` Lennart Borgman (gmail)
2008-07-18 1:01 ` Miles Bader
2008-07-18 4:48 ` David De La Harpe Golden
2008-07-18 12:39 ` Miles Bader
2008-07-18 16:17 ` Stephen J. Turnbull
2008-07-18 17:33 ` David De La Harpe Golden
2008-07-18 18:08 ` James Cloos
2008-07-18 18:59 ` Stephen J. Turnbull
2008-07-18 21:29 ` James Cloos
2008-07-19 0:30 ` Juri Linkov
2008-07-21 1:41 ` Stefan Monnier
2008-07-21 5:35 ` David De La Harpe Golden
2008-07-22 22:59 ` Juri Linkov
2008-07-22 23:17 ` Lennart Borgman (gmail)
2008-07-22 23:29 ` David De La Harpe Golden
2008-07-29 16:07 ` Juri Linkov
2008-07-29 18:00 ` Stefan Monnier
2008-07-19 5:49 ` Stephen J. Turnbull
2008-07-19 0:13 ` Miles Bader
2008-07-19 0:29 ` Juri Linkov
2008-07-19 0:27 ` Juri Linkov
2008-07-20 20:28 ` Juri Linkov [this message]
2008-07-21 1:46 ` Stefan Monnier
2008-07-21 5:07 ` David De La Harpe Golden
2008-07-21 6:04 ` Stefan Monnier
2008-07-21 9:01 ` Juri Linkov
2008-07-21 11:04 ` Johan Bockgård
2008-07-21 11:11 ` David Kastrup
2008-07-21 14:20 ` Johan Bockgård
2008-07-21 14:24 ` David Kastrup
2008-07-21 14:33 ` Lennart Borgman (gmail)
2008-07-21 14:37 ` David Kastrup
2008-07-21 19:25 ` James Cloos
2008-07-21 19:53 ` Stefan Monnier
2008-07-21 20:23 ` Miles Bader
2008-07-21 20:38 ` Lennart Borgman (gmail)
2008-07-21 21:49 ` Johan Bockgård
2008-07-21 22:03 ` David Kastrup
2008-07-21 23:37 ` Johan Bockgård
2008-07-22 1:26 ` David De La Harpe Golden
2008-07-22 22:52 ` Juri Linkov
2008-07-21 20:31 ` David Kastrup
2008-07-21 20:36 ` David De La Harpe Golden
2008-07-21 20:43 ` David Kastrup
2008-07-21 20:50 ` Lennart Borgman (gmail)
2008-07-21 21:12 ` David Kastrup
2008-07-21 21:03 ` Alfred M. Szmidt
2008-07-21 21:24 ` Drew Adams
2008-07-22 4:03 ` Miles Bader
2008-07-21 21:06 ` David De La Harpe Golden
2008-07-22 4:04 ` Miles Bader
2008-07-21 20:31 ` James Cloos
2008-07-21 21:11 ` David De La Harpe Golden
2008-07-21 23:43 ` Juri Linkov
2008-07-22 4:06 ` Miles Bader
2008-07-21 16:54 ` David De La Harpe Golden
2008-07-21 17:04 ` David De La Harpe Golden
2008-07-21 6:16 ` David Kastrup
2008-07-22 0:51 ` Kenichi Handa
2008-07-22 7:56 ` Juanma Barranquero
2008-07-22 8:33 ` Miles Bader
2008-07-22 10:57 ` Juanma Barranquero
2008-07-22 12:26 ` Kenichi Handa
2008-07-22 12:33 ` Lennart Borgman (gmail)
2008-07-22 12:35 ` Miles Bader
2008-07-22 16:16 ` Stefan Monnier
2008-07-22 16:54 ` Drew Adams
2008-07-22 20:38 ` Alfred M. Szmidt
2008-07-22 22:55 ` Juri Linkov
2008-07-23 0:08 ` David De La Harpe Golden
2008-07-23 2:18 ` Miles Bader
2008-07-22 22:54 ` Juri Linkov
2008-07-23 0:28 ` Miles Bader
2008-07-23 1:02 ` Kenichi Handa
2008-07-23 2:32 ` Stefan Monnier
2008-07-23 3:18 ` Miles Bader
2008-07-23 3:38 ` David De La Harpe Golden
2008-07-23 3:53 ` Stefan Monnier
2008-07-23 4:26 ` David De La Harpe Golden
2008-07-23 19:19 ` Stefan Monnier
2008-07-23 20:26 ` David De La Harpe Golden
2008-07-23 9:03 ` Juri Linkov
2008-07-23 10:15 ` Miles Bader
2008-07-23 14:27 ` Juri Linkov
2008-07-23 14:58 ` Miles Bader
2008-07-22 14:06 ` Drew Adams
2008-07-23 13:01 ` Ted Zlatanov
2008-07-23 13:05 ` Lennart Borgman (gmail)
2008-07-23 13:44 ` Drew Adams
2008-07-23 14:27 ` Juri Linkov
2008-07-23 19:24 ` Stefan Monnier
2008-07-23 22:32 ` Juri Linkov
2008-07-24 2:05 ` Stefan Monnier
2008-07-29 15:51 ` Juri Linkov
2008-07-29 17:33 ` Chong Yidong
2008-07-29 17:51 ` Juri Linkov
2008-07-29 19:55 ` Stefan Monnier
2008-07-29 20:51 ` Chong Yidong
2008-07-30 15:29 ` Juri Linkov
2008-07-31 19:20 ` Ted Zlatanov
2008-07-18 0:38 ` describe-char should display the character's Unicode name Kenichi Handa
2008-07-18 0:58 ` Miles Bader
2008-07-18 13:33 ` Ted Zlatanov
2008-07-18 13:53 ` Drew Adams
2008-07-18 14:31 ` Stefan Monnier
2008-07-18 15:22 ` Ted Zlatanov
2008-07-19 0:45 ` Juri Linkov
2008-07-21 16:35 ` Ted Zlatanov
2008-07-21 16:35 ` Lennart Borgman (gmail)
2008-07-21 16:58 ` David De La Harpe Golden
2008-07-22 22:57 ` Juri Linkov
2008-07-23 14:47 ` Ted Zlatanov
2008-07-23 22:31 ` Juri Linkov
2008-07-23 22:52 ` Lennart Borgman (gmail)
2008-07-24 13:29 ` Ted Zlatanov
2008-07-24 13:39 ` Lennart Borgman
2008-07-24 15:27 ` Ted Zlatanov
2008-07-24 15:34 ` Lennart Borgman (gmail)
2008-07-25 0:41 ` Juri Linkov
2008-07-25 2:24 ` Kenichi Handa
2008-07-19 0:35 ` Juri Linkov
2008-07-19 1:11 ` Kenichi Handa
2008-07-20 0:29 ` inputting characters by hexadigit Juri Linkov
2008-07-20 1:23 ` Kenichi Handa
2008-07-20 20:27 ` Juri Linkov
2008-07-23 14:37 ` Ted Zlatanov
2008-07-23 19:31 ` Stefan Monnier
2008-07-23 20:19 ` Ted Zlatanov
2008-07-24 2:08 ` Stefan Monnier
2008-07-24 13:20 ` Ted Zlatanov
2008-07-24 13:40 ` Lennart Borgman
2008-07-24 14:03 ` Stefan Monnier
2008-07-24 15:25 ` Ted Zlatanov
2008-07-24 16:06 ` Stefan Monnier
2008-07-24 17:00 ` Drew Adams
2008-07-24 18:15 ` Ted Zlatanov
2008-07-24 18:37 ` Drew Adams
2008-07-28 13:56 ` Ted Zlatanov
2008-07-24 20:12 ` Stefan Monnier
2008-07-24 20:27 ` Drew Adams
2008-07-24 20:37 ` Lennart Borgman (gmail)
2008-07-24 21:30 ` Lennart Borgman (gmail)
2008-07-24 21:59 ` Lennart Borgman (gmail)
2008-07-28 14:00 ` Ted Zlatanov
2008-07-23 22:35 ` Juri Linkov
2008-07-23 23:00 ` Lennart Borgman (gmail)
2008-07-24 2:18 ` Stefan Monnier
2008-07-25 0:52 ` Juri Linkov
2008-07-24 13:24 ` Ted Zlatanov
2008-07-24 15:55 ` Drew Adams
2008-07-19 0:35 ` describe-char should display the character's Unicode name Juri Linkov
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