Up and down arrow keys do not work on Linux or Mac due to Dotnet.core bug.

[mark-hubers]

I looked into this and made a fixed on my local system and I was going to make a PR for it but this project is locked down I believed. So here what I did to make this great menu work on Linux and Mac so one can use the up and down arrow vs crashing out of the menu.

In file: PSMenu/Private/Read-VKey.ps1 I added the following:

    try {
        return $CurrentHost.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
    }

to

     try {
        if ($IsLinux -or $IsMacOS) {
            ## A bug with Linux and Mac where arrow keys are return in 2 chars.  First is esc follow by A,B,C,D
            $key1 = $CurrentHost.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
            
            if ($key1.VirtualKeyCode -eq 0x1B) {
            ## Found that we got an esc chair so we need to grab one more char
            $key2 = $CurrentHost.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")

                ## We just care about up and down arrow mapping here for now.
                if ($key2.VirtualKeyCode -eq 0x41) {
                    # VK_UP = 0x26 up-arrow
                    $key1.VirtualKeyCode = 0x26
                }
                if ($key2.VirtualKeyCode -eq 0x42) {
                    # VK_DOWN = 0x28 down-arrow
                    $key1.VirtualKeyCode = 0x28
                }
            }
            Return $key1
        } else {
            return $CurrentHost.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
        }
    }

Hope this helps.

[Sebazzz]

Thank you. I don't think the project is locked down, but I did just make a few commits so you might run into a merge conflict.

You mention there is a .NET bug - is it tracked upstream, and if so, under which number?

[mark-hubers]

It is a hard problem to point out but here are some refs:
PowerShell/PowerShell#16443
dotnet/runtime#63387
PowerShell/PowerShell#16606

[Sebazzz]

Thanks, released as v0.1.8!