AltGr/DeadKey + Space was broken - FIXED IN 1.20.10572.0

[BrtCst]

Windows Terminal version

1.20.10303.0

Windows build number

10.0.22635.3130

Other Software

WSL 2.1.1.0

Steps to reproduce

1. Using FR bepo keyboard layout
2. Typing AltGr + Space in a WSL tab

Expected Behavior

It should type an underscore, since AltGr + Space is the mapping for _ in FR bepo layout.

Actual Behavior

Rings the system bell. Worked fine in Terminal 1.18

[zadjii-msft]

Hmm

• No key stroke for AltGr + space (and other AltGr combinations) #11968 -->
• AltGr + Space combination doesn’t work all of a sudden #11649 which was originally fixed by:
• Fix AltGr+Space not working #11832

@j4james did this one get regressed in #16511?

[j4james]

Yeah, sorry. That's almost certainly a result of PR #16511. We're treating Space as a "functional" key, which means it gets hardcoded VT mappings which take precedence over the keyboard layout. It's not modal, though, so it's possible it could be handled as a regular "graphic" key. However, I have a sneaking suspicion that could break another keyboard layout, and that's why I put it with "functional" keys in the first place. But that may have been an old issue that was resolved in one of my many rewrites. I'll need to do some testing to double check.

[j4james]

Unfortunately it's not a simple fix. The reason I chose to handle it as a "functional" key was because the mapping for Ctrl+Space on a number of keyboard layouts is just SP, while it's expected by VT applications to be NUL. This includes the US layout. So if we handle it as a "graphic" key, that's going to break.

Not that that's impossible to fix, but it's likely to be messy.