From: "Perry E. Metzger" <perry@piermont.com>
To: Juri Linkov <juri@linkov.net>, Yuri Khan <yuri.v.khan@gmail.com>
Cc: Emacs developers <emacs-devel@gnu.org>
Subject: Re: not quite understanding input methods
Date: Wed, 1 Sep 2021 08:58:46 -0400 [thread overview]
Message-ID: <348756cf-6924-b390-01f5-9541ac56ca92@piermont.com> (raw)
In-Reply-To: <871r686abe.fsf@mail.linkov.net>
On 9/1/21 03:23, Juri Linkov wrote:
> Emacs 28 has the input method "Compose" corresponding to XKB's Compose
> in leim/quail/compose.el, but many useful key sequences in this
> input method don't work because of the artificial limitation
> to ASCII-only chars in read_char.
>
I've been looking at this a bit. If you simply lift the limitation in
read_char everything downstream fails. It appears that the limitation is
partially caused by the fact that quail.el expects to be able to create
dense keymaps of size limited to 255, though that might not be the only
problem. Note that fixing this won't be overly difficult, but it would
need to be fixed in anything that can supply a `input-method-function`
that is hooked by read_char.
(BTW, as a pure aside: why aren't keymaps hash tables? Is that purely
historical?)
(FYI, I fear that after the last few days of reading I may be the expert
on how all of this works, which is terrifying because I feel completely
lost in the code. It's a maze. It's pretty rare that I see a part of
Emacs that I feel should be nuked from orbit, but the input subsystem
feels that way; a rewrite would be required to make it actually
comprehensible, but a rewrite would also break enormous amounts of stuff
that people depend on.)
Perry
next prev parent reply other threads:[~2021-09-01 12:58 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-30 17:24 not quite understanding input methods Perry E. Metzger
2021-08-30 17:37 ` Stefan Monnier
2021-08-30 17:45 ` Perry E. Metzger
2021-08-30 18:00 ` Stefan Monnier
2021-08-30 18:22 ` Eli Zaretskii
2021-08-30 18:34 ` Perry E. Metzger
2021-08-30 18:39 ` Eli Zaretskii
2021-08-30 18:43 ` Perry E. Metzger
2021-08-30 18:37 ` Perry E. Metzger
2021-08-30 19:00 ` Perry E. Metzger
2021-08-30 19:08 ` Eli Zaretskii
2021-08-30 19:13 ` Perry E. Metzger
2021-08-30 19:19 ` Stefan Monnier
2021-08-30 19:26 ` Perry E. Metzger
2021-08-30 19:31 ` Eli Zaretskii
2021-08-30 20:12 ` Stefan Monnier
2021-08-30 19:28 ` Eli Zaretskii
2021-08-30 20:29 ` André A. Gomes
2021-09-01 5:44 ` Yuri Khan
2021-09-01 7:23 ` Juri Linkov
2021-09-01 7:43 ` Yuri Khan
2021-09-01 8:37 ` tomas
2021-09-01 9:14 ` Joost Kremers
2021-09-01 13:17 ` Perry E. Metzger
2021-09-01 12:05 ` Eli Zaretskii
2021-09-01 12:35 ` João Távora
2021-09-01 13:19 ` André A. Gomes
2021-09-01 14:05 ` João Távora
2021-09-01 13:03 ` André A. Gomes
2021-09-01 13:02 ` Perry E. Metzger
2021-09-02 12:00 ` Maxim Nikulin
2021-09-02 13:03 ` Filipp Gunbin
2021-09-01 12:58 ` Perry E. Metzger [this message]
2021-09-01 12:51 ` Perry E. Metzger
2021-09-01 13:29 ` Partially answering my own question (was Re: not quite understanding input methods) Perry E. Metzger
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