From: Eli Zaretskii <eliz@gnu.org>
To: "Joakim Hårsman" <joakim.harsman@gmail.com>
Cc: 10299@debbugs.gnu.org
Subject: bug#10299: Emacs doesn't handle Unicode characters in keyboard layout on MS Windows
Date: Thu, 15 Dec 2011 01:22:11 -0500 [thread overview]
Message-ID: <E1Rb4hn-0002C6-5C@fencepost.gnu.org> (raw)
In-Reply-To: <CAFJF9wWtwfQxCfXFET-x5d+JwJLVqvAFHEY-WwgVpni8kcU9nA@mail.gmail.com> (message from Joakim Hårsman on Wed, 14 Dec 2011 21:39:28 +0100)
> Date: Wed, 14 Dec 2011 21:39:28 +0100
> From: Joakim Hårsman <joakim.harsman@gmail.com>
>
> However, Emacs doesn't seem to handle the case when the keyboard
> layout contains characters not available in the ANSI code page, and
> just prints a question mark character instead.
Yes, Emacs on Windows uses the ANSI codepage to read the keyboard
input. Does it help to play with the value of keyboard-coding-system?
> For certain characters,
> a character that is visually similar to the actual character is
> printed instead of a question mark. For example, if I use a layout
> where AltGr+O produces U+2218 RING OPERATOR, Emacs prints U+00B0
> DEGREE SYMBOL instead. The degree symbol is available in Windows 1252,
> the default ANSI code page on my system, but the ring operator
> isn't.
I'm guessing that this is Windows trying to translate the characters
to the ANSI codepage behind the scenes.
> However, if the layout maps AltGr+R to U+0220A SMALL ELEMENT OF, Emacs
> just prints a question mark, presumably because Windows 1252 doesn't
> contain a reasonable replacement for that character.
Will inputting these characters with "C-x 8 RET 0220a RET" or "C-x 8
RET SMALL ELEMENT OF RET" be a good enough solution for you? You can
input any Unicode character by its name or codepoint using "C-x 8 RET".
> I'd be happy to help debug this but I have no idea where to even
> start. Is there an easy way to find out if it's the C code that
> clobbers the character or if it happens in lisp for example?
I don't think there any "clobbering". Emacs deliberately converts the
Unicode characters to the current locale's ANSI codepage. I think
(but I'm not sure) the reason is that Emacs cannot use UTF-16 for
keyboard input. Perhaps Jason and Handa-san could comment on this.
next prev parent reply other threads:[~2011-12-15 6:22 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-14 20:39 bug#10299: Emacs doesn't handle Unicode characters in keyboard layout on MS Windows Joakim Hårsman
2011-12-15 6:22 ` Eli Zaretskii [this message]
2011-12-15 6:51 ` Kenichi Handa
2011-12-15 7:53 ` Joakim Hårsman
2011-12-15 10:52 ` Eli Zaretskii
2011-12-15 11:11 ` Joakim Hårsman
2011-12-15 13:16 ` Eli Zaretskii
2011-12-15 14:40 ` Jason Rumney
2011-12-15 15:08 ` Lennart Borgman
2011-12-15 15:40 ` Joakim Hårsman
2011-12-15 17:34 ` Eli Zaretskii
2011-12-15 20:50 ` Joakim Hårsman
2011-12-15 21:47 ` Joakim Hårsman
2011-12-16 8:13 ` Eli Zaretskii
2011-12-16 11:01 ` Joakim Hårsman
2011-12-16 11:14 ` Dani Moncayo
2011-12-16 11:26 ` Eli Zaretskii
2011-12-17 12:52 ` Joakim Hårsman
2011-12-17 15:23 ` Eli Zaretskii
[not found] ` <CAFJF9wW7Cfmad+BmjQ4A-sVeLi+eRvOXSWfD=--=QJmr3Ver6w@mail.gmail.com>
2011-12-18 18:13 ` Eli Zaretskii
2011-12-19 10:44 ` Joakim Hårsman
2011-12-19 10:59 ` Lennart Borgman
2011-12-19 11:04 ` Joakim Hårsman
2011-12-19 11:17 ` Lennart Borgman
2011-12-19 11:50 ` Joakim Hårsman
2011-12-19 13:31 ` Jason Rumney
2011-12-20 21:16 ` Joakim Hårsman
2012-01-14 16:40 ` Joakim Hårsman
2012-01-16 14:03 ` Stefan Monnier
2012-01-23 19:15 ` Joakim Hårsman
2012-01-24 1:35 ` Stefan Monnier
2012-01-24 9:40 ` Andreas Schwab
2012-01-24 12:03 ` Juanma Barranquero
2012-01-24 20:42 ` Joakim Hårsman
2012-07-28 14:50 ` Eli Zaretskii
2012-08-06 20:20 ` Joakim Hårsman
2012-08-07 2:53 ` Eli Zaretskii
2012-08-07 19:47 ` Joakim Hårsman
2012-08-08 2:48 ` Eli Zaretskii
2012-08-08 18:54 ` Joakim Hårsman
2012-08-10 6:56 ` Eli Zaretskii
2012-08-07 12:15 ` Jason Rumney
2012-08-07 19:49 ` Joakim Hårsman
2011-12-16 11:22 ` Eli Zaretskii
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