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

Sun Sep 3 22:08:13 UTC 2023

On Sun, 2 Apr 2023 20:38:25 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:

> This replaces obsolete XIM and uses gtk api for IME.
> Gtk uses [ibus](https://github.com/ibus/ibus)
> 
> Gtk3+ uses relative positioning (as Wayland does), so I've added a Relative positioning on `InputMethodRequest`.

Thank you for the feedback. Will look into it.

I'm sure I am missing details of other languages. 
@kevinrushforth Is there anyone at Oracle that could provide guidance on language variations so I can make this right?

Yeah, I know many things are probably no working. The plan is to get feedback and keep fixing until it's all good.
I only speak/read latin-based languages so I have never needed IME.

The process is now reporting KEY_PRESS events even if filtered by IME. 

@beldenfox You seem to have a lot of expertise on the topic. Should dead keys be reported as KEY_PRESS with the corresponding character?

I asked around on Gtk IRC and `gdk_keyval_to_unicode` won't work for dead keys. We need a custom map including dead keys as seen on [gdkkeyuni.c](https://gitlab.gnome.org/GNOME/gtk/-/blob/gtk-3-24/gdk/gdkkeyuni.c)

Dead keys should work now, but not sure I covered them all.

Yesterday I was reading some of the Mac code for handling IME to understand it better. I started to get the idea. 
@beldenfox Your test app is very handy.

This is the current state:

[Screencast from 03-09-2023 15:47:01.webm](https://github.com/openjdk/jfx/assets/30704286/db30803a-0c8b-450d-95a1-81bf80a4b2ff)

I did put a lot of work on it.

Now I need feedback from users if everything is working as expected. I'm unsure if I missed a detail from a specific language/culture.

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PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1494229776
PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1496737066
PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1498124303
PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1546904623
PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1546999336
PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1547013377
PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1549412139
PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1704374033
PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-1704417064