RFR: 8305418: [Linux] Replace obsolete XIM as Input Method Editor [v31]

[Helly Guo]

On Thu, 12 Dec 2024 11:38:37 GMT, Helly Guo <duke at openjdk.org> wrote:

>> @beldenfox , you are right.
>> I created a brand new env in virt-manager:
>> 
>> 
>> virt at virtdeb:~$ uname -a
>> Linux virtdeb 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
>> 
>> virt at virtdeb:~$ cat /etc/os-release 
>> PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
>> NAME="Debian GNU/Linux"
>> VERSION_ID="12"
>> VERSION="12 (bookworm)"
>> VERSION_CODENAME=bookworm
>> ID=debian
>> HOME_URL="https://www.debian.org/"
>> SUPPORT_URL="https://www.debian.org/support"
>> BUG_REPORT_URL="https://bugs.debian.org/"
>> 
>> virt at virtdeb:~$ java -version
>> openjdk version "23.0.1" 2024-10-15
>> OpenJDK Runtime Environment (build 23.0.1+11-39)
>> OpenJDK 64-Bit Server VM (build 23.0.1+11-39, mixed mode, sharing)
>> 
>> virt at virtdeb:~$ fcitx5 -v
>> 5.0.21
>> 
>> 
>> After tested, I found that what you said is true. Forgot what I said, go ahead.
>> 
>> Thanks again for your(@tsayao / @beldenfox ) amazing working.
>> [Screencast from 2024-12-12 17-55-44.webm](https://github.com/user-attachments/assets/d2935d8a-9a5a-4603-a9d0-23f59b2b8f4d)
>
> Finally, I got the point. Fcitx5 has a setting entry: `Show preedit in application`. If this is on, it works well. If this is off, the value `im_ctx.on_preedit` will get `false` when im(`fcitx5`) finished input-action. Then, the input will not show in the TextField.
> 
> ![wechat_2024-12-12_193021_345](https://github.com/user-attachments/assets/9cab3844-8166-43fe-b69d-bda00f422e90)

![pic_20241212193112](https://github.com/user-attachments/assets/7b9233f9-3af5-42d5-89f9-9f85248d68dd)

The option is surrounded by a red box.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1080#discussion_r1881906512