Text with ANSI escape codes provokes glitches in a Log widget

[superlevure]

• Have you checked closed issues? https://github.com/Textualize/textual/issues?q=is%3Aissue+is%3Aclosed

When writing text that contains ANSI escape codes to a Log widget, the border glitches:

I've posted a minimal reproducible example here: https://github.com/superlevure/textual-scroll-bug

For context, the data I'm trying to write to a Log widget comes from a Gitlab CI job trace, as produced by this API: https://docs.gitlab.com/ee/api/jobs.html#get-a-log-file

Textual Diagnostics

Versions

Name	Value
Textual	0.39.0
Rich	13.6.0

Python

Name	Value
Version	3.11.5
Implementation	CPython
Compiler	GCC 11.4.0
Executable	.env/bin/python3.11

Operating System

Name	Value
System	Linux
Release	5.4.0-1106-gcp
Version	#115~18.04.1-Ubuntu SMP Mon May 22 20:46:39 UTC 2023

Terminal

Name	Value
Terminal Application	vscode (1.83.0)
TERM	xterm-256color
COLORTERM	truecolor
FORCE_COLOR	Not set
NO_COLOR	Not set

Rich Console options

Name	Value
size	width=187, height=33
legacy_windows	False
min_width	1
max_width	187
is_terminal	True
encoding	utf-8
max_height	33
justify	None
overflow	None
no_wrap	False
highlight	None
markup	None
height	None

[github-actions]

We found the following entries in the FAQ which you may find helpful:

• How do I center a widget in a screen?
• Why doesn't Textual support ANSI themes?

Feel free to close this issue if you found an answer in the FAQ. Otherwise, please give us a little time to review.

This is an automated reply, generated by FAQtory