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ANSI codes appearing as autocomplete visual artifacting #1558
Description
Environment
PS version: 5.1.14409.1018
PSReadline version: 2.1.0-beta1
os: 6.3.9600.16384 (winblue_rtm.130821-1623)
PS file version: 10.0.14409.1005 (rs1_srvoob.161208-1155)
HostName: Visual Studio Code Host
BufferWidth: 218
BufferHeight: 3000
Exception report
Steps to reproduce
Open Latest VSCode + Powershell-Preview extension in RDP session. Attempt to type any cmdlet in the Integrated Shell.
Expected behavior
Autocomplete working properly, showing potential commands.
Actual behavior
Observe that weird auto-completed artifacting appears, which seems to include ANSI codes. In the below image I had Typed "Get-"
Activity
gilescope commentedon May 29, 2020
I wonder if you can integrate windows terminal into vscode because that’s the true fix for ansi codes appearing.
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vexx32 commentedon May 29, 2020
Visual Studio Code implements its own terminal for everything using xterm.js. It's also cross-platform so I don't think they can integrate a Windows-only component.
SeeminglyScience commentedon May 29, 2020
If they were running a build of Windows that could install terminal (they appear to be running server 2k12), the escape codes would work fine anyway.
iirc PSReadLine has a check for when the OS doesn't support ANSI escapes and should revert to a simplier renderer.
Some possibilities:
I never really looked at the code for the simple interface so some of the above might be nonsensical.
daxian-dbw commentedon Jun 4, 2020
Thanks for reporting the issue. The issue has been fixed in the master branch (#1496), by making the predictive suggestion feature off by default. The predictive suggestion feature can be turned on by
Set-PSReadLineOption -PredictionSource History(by default thePredictionSourceisNone). But if PSReadLine is used in a host that doesn't support VT100, that feature cannot be enabled --Set-PSReadLineOption -PredictionSource Historywill throw error accordingly.