* bug#24635: 24.5; Missing preview of entered unicode codepoints (C-q codepoint SPC)
@ 2016-10-07 9:53 Qqwy/W-M
2016-10-07 12:35 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Qqwy/W-M @ 2016-10-07 9:53 UTC (permalink / raw)
To: 24635
[-- Attachment #1.1.1: Type: text/plain, Size: 22326 bytes --]
Hello dear Emacs maintainers,
This is an upstreamed report, originally posted on the [Spacemacs GitHub
Issue tracker](https://github.com/syl20bnr/spacemacs/issues/7311).
Today I learned from [this video
tutorial](https://youtu.be/3hwUnhdKWiI?t=4m27s), (link to the time with
exact explanation) of this feature that you can type C-q, followed by
the octal(or, if configured, decimal or hexadecimal) unicode codepoint,
followed by a non-digit key, to insert the appropriate unicode character.
However, for some reason, these typed codepoints do not show up in the
echo bar at the far bottom, making it very easy to mistype.
This was first tested in Spacemacs, but is reproducible in emacs -Q.
@TheBB on GitHub responded:
> Looks like quoted-insert users read-quoted-char in the background, which doesn't echo key presses unless it's called with a prompt.
> Dirty workaround follows.
> ```
> (defun read-quoted-char-always-echo (orig-fn &optional prompt)
> (funcall orig-fn (or prompt "Character code: ")))
> (defun quoted-insert-always-echo (orig-fn arg)
> (prog2
> (advice-add 'read-quoted-char :around 'read-quoted-char-always-echo)
> (funcall orig-fn arg)
> (advice-remove 'read-quoted-char 'read-quoted-char-always-echo)))
> (advice-add 'quoted-insert :around 'quoted-insert-always-echo)
> ```
Thank you,
~Wiebe-Marten/Qqwy.
___
In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.23)
of 2016-10-02 on Qark
Windowing system distributor `The X.Org Foundation', version 11.0.11501000
System Description: Linux Mint 17.2 Rafaela
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^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#24635: 24.5; Missing preview of entered unicode codepoints (C-q codepoint SPC)
2016-10-07 9:53 bug#24635: 24.5; Missing preview of entered unicode codepoints (C-q codepoint SPC) Qqwy/W-M
@ 2016-10-07 12:35 ` Eli Zaretskii
2016-11-21 16:13 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Eli Zaretskii @ 2016-10-07 12:35 UTC (permalink / raw)
To: Qqwy/W-M; +Cc: 24635
> From: Qqwy/W-M <qqwy@gmx.com>
> Date: Fri, 7 Oct 2016 11:53:41 +0200
>
> Today I learned from [this video
> tutorial](https://youtu.be/3hwUnhdKWiI?t=4m27s), (link to the time with
> exact explanation) of this feature that you can type C-q, followed by
> the octal(or, if configured, decimal or hexadecimal) unicode codepoint,
> followed by a non-digit key, to insert the appropriate unicode character.
>
> However, for some reason, these typed codepoints do not show up in the
> echo bar at the far bottom, making it very easy to mistype.
This bug was introduced in Emacs 24.4. Further bisection is welcome.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#24635: 24.5; Missing preview of entered unicode codepoints (C-q codepoint SPC)
2016-10-07 12:35 ` Eli Zaretskii
@ 2016-11-21 16:13 ` Eli Zaretskii
2016-11-21 16:26 ` Stefan Monnier
0 siblings, 1 reply; 6+ messages in thread
From: Eli Zaretskii @ 2016-11-21 16:13 UTC (permalink / raw)
To: Stefan Monnier; +Cc: 24635, qqwy
> Date: Fri, 07 Oct 2016 15:35:50 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 24635@debbugs.gnu.org
>
> > From: Qqwy/W-M <qqwy@gmx.com>
> > Date: Fri, 7 Oct 2016 11:53:41 +0200
> >
> > Today I learned from [this video
> > tutorial](https://youtu.be/3hwUnhdKWiI?t=4m27s), (link to the time with
> > exact explanation) of this feature that you can type C-q, followed by
> > the octal(or, if configured, decimal or hexadecimal) unicode codepoint,
> > followed by a non-digit key, to insert the appropriate unicode character.
> >
> > However, for some reason, these typed codepoints do not show up in the
> > echo bar at the far bottom, making it very easy to mistype.
>
> This bug was introduced in Emacs 24.4. Further bisection is welcome.
The reason is this commit:
commit 321e1a9c4283e1fd1db5a6b7c75325d5ed7b97e1
Author: Stefan Monnier <monnier@iro.umontreal.ca>
AuthorDate: Fri Jul 5 20:10:54 2013 -0400
Commit: Stefan Monnier <monnier@iro.umontreal.ca>
CommitDate: Fri Jul 5 20:10:54 2013 -0400
* lisp/subr.el (read-quoted-char): Use read-key.
(sit-for): Let read-event decode tty input.
Fixes: debbugs:14782
Only the second part of the change is AFAIU actually related to
bug#14782. The change in read-quoted-char (and in at least one more
place not even mentioned in the log) is due to some general issue with
read-event that is hinted at in the comment in sit-for added by this
commit.
If I replace the call to read-key in read-quoted-char with an
equivalent call to read-event, the "C-q" echoing is back.
Stefan, do you see a way to make read-key or the functions it calls
echo the input characters? I didn't see a way to do that, but maybe I
missed something.
Failing that, I'm inclined to go back to using read-event in
read-quoted-char. After all, we didn't have any bug reports due to
that, and the echo is a valuable feature, IMO.
A somewhat kludgy alternative is something like the patch below, but
I'm not sure it's justified here. (It doesn't exactly restore
previous behavior, because the initial "C-q-" prompt appears
immediately, rather than after read-key-delay, but it's close.)
--- lisp/simple.el~0 2016-10-25 07:30:02.000000000 +0300
+++ lisp/simple.el 2016-11-21 10:11:35.430192000 +0200
@@ -776,7 +776,7 @@
(let (translation-table-for-input input-method-function)
(if (or (not overwrite-mode)
(eq overwrite-mode 'overwrite-mode-binary))
- (read-quoted-char)
+ (read-quoted-char (key-description (this-command-keys)))
(read-char))))))
;; This used to assume character codes 0240 - 0377 stand for
;; characters in some single-byte character set, and converted them
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#24635: 24.5; Missing preview of entered unicode codepoints (C-q codepoint SPC)
2016-11-21 16:13 ` Eli Zaretskii
@ 2016-11-21 16:26 ` Stefan Monnier
2016-11-21 16:54 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Stefan Monnier @ 2016-11-21 16:26 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 24635, qqwy
> Stefan, do you see a way to make read-key or the functions it calls
> echo the input characters? I didn't see a way to do that, but maybe I
> missed something.
Hmm... it would be good to find such a way, indeed, since the issue is
likely to show at other places where we'd want to use read-key.
> Failing that, I'm inclined to go back to using read-event in
> read-quoted-char. After all, we didn't have any bug reports due to
> that, and the echo is a valuable feature, IMO.
Indeed, the scenarios where read-key is preferable to read-event in the
context of read-quoted-char are fairly hypothetical.
So, we should probably revert that for now, but adding a comment about
why we don't use read-key.
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#24635: 24.5; Missing preview of entered unicode codepoints (C-q codepoint SPC)
2016-11-21 16:26 ` Stefan Monnier
@ 2016-11-21 16:54 ` Eli Zaretskii
2016-11-25 10:10 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Eli Zaretskii @ 2016-11-21 16:54 UTC (permalink / raw)
To: Stefan Monnier; +Cc: 24635, qqwy
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: qqwy@gmx.com, 24635@debbugs.gnu.org
> Date: Mon, 21 Nov 2016 11:26:43 -0500
>
> > Stefan, do you see a way to make read-key or the functions it calls
> > echo the input characters? I didn't see a way to do that, but maybe I
> > missed something.
>
> Hmm... it would be good to find such a way, indeed, since the issue is
> likely to show at other places where we'd want to use read-key.
Agreed.
> > Failing that, I'm inclined to go back to using read-event in
> > read-quoted-char. After all, we didn't have any bug reports due to
> > that, and the echo is a valuable feature, IMO.
>
> Indeed, the scenarios where read-key is preferable to read-event in the
> context of read-quoted-char are fairly hypothetical.
>
> So, we should probably revert that for now, but adding a comment about
> why we don't use read-key.
OK, will do in a couple of days if no one objects.
The commit I pointed to made 2 more changes in read-quoted-char,
related to the way unread-command-events is set. I understand that
those two changes also need to be reverted when we go back to using
read-event, right?
Thanks.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#24635: 24.5; Missing preview of entered unicode codepoints (C-q codepoint SPC)
2016-11-21 16:54 ` Eli Zaretskii
@ 2016-11-25 10:10 ` Eli Zaretskii
0 siblings, 0 replies; 6+ messages in thread
From: Eli Zaretskii @ 2016-11-25 10:10 UTC (permalink / raw)
To: monnier; +Cc: 24635-done, qqwy
> Date: Mon, 21 Nov 2016 18:54:12 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 24635@debbugs.gnu.org, qqwy@gmx.com
>
> > > Failing that, I'm inclined to go back to using read-event in
> > > read-quoted-char. After all, we didn't have any bug reports due to
> > > that, and the echo is a valuable feature, IMO.
> >
> > Indeed, the scenarios where read-key is preferable to read-event in the
> > context of read-quoted-char are fairly hypothetical.
> >
> > So, we should probably revert that for now, but adding a comment about
> > why we don't use read-key.
>
> OK, will do in a couple of days if no one objects.
Done on the release branch.
> The commit I pointed to made 2 more changes in read-quoted-char,
> related to the way unread-command-events is set. I understand that
> those two changes also need to be reverted when we go back to using
> read-event, right?
I reverted those as well.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2016-11-25 10:10 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-10-07 9:53 bug#24635: 24.5; Missing preview of entered unicode codepoints (C-q codepoint SPC) Qqwy/W-M
2016-10-07 12:35 ` Eli Zaretskii
2016-11-21 16:13 ` Eli Zaretskii
2016-11-21 16:26 ` Stefan Monnier
2016-11-21 16:54 ` Eli Zaretskii
2016-11-25 10:10 ` Eli Zaretskii
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