RFR: 8305418: [Linux] Replace obsolete XIM as Input Method Editor [v25]

[Thiago Milczarek Sayao]

On Wed, 2 Oct 2024 09:06:17 GMT, Lukasz Kostyra <lkostyra at openjdk.org> wrote:

> I have an issue in IMETest with the new patch. This does not happen on master, so I suspect it's a regression.
> 
> I tried typing with polish keyboard and it seems like it does not pick up the special characters which use diacritical signs - ą, ć, ę, ł, ń, ó, ś, ż, ź. Polish keyboard layout (known in Ubuntu simply as "Polish", in Windows as "Polish (programmers)") invokes those by using a combination of Right Alt + respective key so to get the above. The only exception is ż and ź:
> 
> * Right Alt + Z == ż
> * Right Alt + X == ź
> 
> It seems like something recognizes those characters in the background, as I do get `Released: <character>` message in the console, but nothing shows up in the Text Area of IMETest. On master I do get `Pressed: <character>` messages when trying to type those characters, so I suspect some event does not fire.
> 
> **EDIT:** I should add, this was tested on Ubuntu 24.04.1 LTS

It seems IME filters the key press event in the case of those characters. So I think I'll have to keep the event values and then send on `commitIME`, both press and release, depending on what was filtered.

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PR Comment: https://git.openjdk.org/jfx/pull/1080#issuecomment-2391456452