FSI's cursor does not correctly handle full-width characters

[ijklam]

FSI's cursor does not correctly handle full-width characters.

Repro steps

Provide the steps required to reproduce the problem:

1. Run dotnet fsi
2. Input some full-width characters
3. Move the cursor left or right

Expected behavior

The cursor should not appear inside the character.

Actual behavior

The cursor will appear inside the character.

Known workarounds

The NStack.ustring in package NStack.Core has a property named ConsoleWidth, which will be useful to fix the bug.

[ijklam]

Is there any update? Can I make a pr to fix this?

[vzarytovskii]

Is there any update? Can I make a pr to fix this?

Sure, we'll gladly accept PR with the fix.

[abonie]

I wanted to check something and tried to reproduce this issue, but when I run dotnet fsi in windows terminal, everything pastes in as question marks (halfwidth). Which is weird, because in windows terminal outside of fsi, I can paste fullwidth chars just fine... Anyone has a hint regarding what settings I need to change on my side to fix that?

[ijklam]

I wanted to check something and tried to reproduce this issue, but when I run dotnet fsi in windows terminal, everything pastes in as question marks (halfwidth). Which is weird, because in windows terminal outside of fsi, I can paste fullwidth chars just fine... Anyone has a hint regarding what settings I need to change on my side to fix that?

Maybe you can check the encoding setting of System.Console. In my computer the encoding is Codepage - 936, which is same encoding as terminal.