bug#53173: 28.0.91; preedit style for X Input Method is not supported?

bug#53173: 28.0.91; preedit style for X Input Method is not supported?

[Hirofumi Kosaka]

Hello all,

The X Server that I use supports 'over-the-spot' for XIM (X Input
Method) preedit style, but the pretest version forces root window
style, that is the most basic style but not good enough for us CJK
users.

Emacs 27.2 (or earlier) works fine for it, but the pretest version
seems to ignore available preedit styles (X server provides) or so.

Regards,

***

In GNU Emacs 28.0.91 (build 1, x86_64-pc-linux-gnu)
 of 2022-01-11 built on ginrei
Windowing system distributor 'ASTEC, Inc.', version 11.0.6600
System Description: Rocky Linux 8.5 (Green Obsidian)

Configured using:
 'configure --prefix=/home/kosaka/pretest/emacs-28.0.91
 --with-x-toolkit=no'

Configured features:
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PNG SECCOMP SOUND THREADS TIFF X11 XIM XPM ZLIB

Important settings:
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bug#53173: 28.0.91; preedit style for X Input Method is not supported?

[Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Hirofumi Kosaka <kosaka@rworks.jp> writes:

> Hello all,
>
> The X Server that I use supports 'over-the-spot' for XIM (X Input
> Method) preedit style, but the pretest version forces root window
> style, that is the most basic style but not good enough for us CJK
> users.

I completely agree.  Someone deleted the code for other styles to fix a
bug, instead of fixing the real cause of that problem, which I did on
master.

> Emacs 27.2 (or earlier) works fine for it, but the pretest version
> seems to ignore available preedit styles (X server provides) or so.

It's too late to change this inside the pretests, but it should work on
master.  As a bonus, you get the ability to change the input style, and
use any input method supported by GTK+.  To switch back to
`overthespot', simply add the following to your .Xresources file and
apply it:

  Emacs.inputStyle: overthespot

Also, please report any bugs you find with the new input style options.

XIM is a legacy interface, and at support for it has in general
experienced quite some bit-rot.

Closing, since it's been fixed on master.

bug#53173: 28.0.91; preedit style for X Input Method is not supported?

[Eli Zaretskii]

> Cc: 53173-done@debbugs.gnu.org
> Date: Tue, 11 Jan 2022 16:12:01 +0800
> From:  Po Lu via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> Hirofumi Kosaka <kosaka@rworks.jp> writes:
> 
> > Hello all,
> >
> > The X Server that I use supports 'over-the-spot' for XIM (X Input
> > Method) preedit style, but the pretest version forces root window
> > style, that is the most basic style but not good enough for us CJK
> > users.
> 
> I completely agree.  Someone deleted the code for other styles to fix a
> bug, instead of fixing the real cause of that problem, which I did on
> master.
> 
> > Emacs 27.2 (or earlier) works fine for it, but the pretest version
> > seems to ignore available preedit styles (X server provides) or so.
> 
> It's too late to change this inside the pretests, but it should work on
> master.

Which commit fixed that on master?

bug#53173: 28.0.91; preedit style for X Input Method is not supported?

[Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Eli Zaretskii <eliz@gnu.org> writes:

>> Cc: 53173-done@debbugs.gnu.org
>> Date: Tue, 11 Jan 2022 16:12:01 +0800
>> From:  Po Lu via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>> 
>> Hirofumi Kosaka <kosaka@rworks.jp> writes:
>> 
>> > Hello all,
>> >
>> > The X Server that I use supports 'over-the-spot' for XIM (X Input
>> > Method) preedit style, but the pretest version forces root window
>> > style, that is the most basic style but not good enough for us CJK
>> > users.
>> 
>> I completely agree.  Someone deleted the code for other styles to fix a
>> bug, instead of fixing the real cause of that problem, which I did on
>> master.
>> 
>> > Emacs 27.2 (or earlier) works fine for it, but the pretest version
>> > seems to ignore available preedit styles (X server provides) or so.
>> 
>> It's too late to change this inside the pretests, but it should work on
>> master.

> Which commit fixed that on master?

The two commits that introduced the ability to use preedit text in XIM
input methods, and to change the preedit style.

They're definitely not safe to backport, IMO, just look at the recent
bug reports related to fcitx5 (which used to not work at all, but now
has display bugs, probably due to a problem in their code.)