Support Hyper for bindings

[morenathan]

I see where Shift, Control, Super, and Alt are supported. Mod5/altgr is support as well; But I don't see where Hyper can be bound. The documentation doesn't seem to allow me to bind based on any custom key either.

This would be wonderful to also have available and is traditional to have on a Unix keyboard.

[YaLTeR]

Is that another xkb modifier? If so, then it needs to be added to the Smithay enum first.

Also, I thought generally what people call Hyper is a combination of several normal modifiers? If so then you can bind that by spelling them out.

[morenathan]

No, it's an actual key. Windows has typically called "Hyper" a combination of Ctrl+Alt+Shift, but under xkb it's generally Mod4 under X11 iirc.

I'm not too familiar with any of these new C variants, but I can look there :)

[YaLTeR]

You can check this as an example: Smithay/smithay#1365

[YaLTeR]

And this: #261

[morenathan]

from xkb/keycodes:

    <LVL5> =     8;
    alias <MDSW> = <LVL5>;
    <LVL3> =   124; // <U7C>
    <ALT>  =   125; // <U7D>
    <META> =   156; // <I1C>
    <SUPR> =   127; // <U7F>
    <HYPR> =   128; // <U80>