Xterm.js: emoji/unicode support mostly broken in windows

[jerch]

Reminder issue to get the hands dirty to identify/fix unicode issues in windows, for some background see comments in https://github.com/xtermjs/xterm.js/pull/2568.

[ynechaev]

Any plans to iterate on this issue?

[Tyriar]

Just time is blocking it, I have too many more important things to look at so I doubt I would be able to get to it. This needs some investigation of what differs with emoji between native ptys and Conpty on Windows and to come up with a plan to support both.

[ynechaev]

Emoji support for windows terminal looks backlogged since 2018 https://github.com/microsoft/terminal/issues/190

[Tyriar]

Oh ok, so it's partially supported then. I thought I saw them advertising emoji support as one of the shiny things in WT 🤔

[jerch]

Last time I looked at it the problem was around line/screen refresh pattern used by conpty. The emojis itself came thought but got partially scrambled by wrong offsets of the refreshs (deleting parts of multibyte chars).