nushell/crates/nu-command/tests/commands/platform
Douglas b8efd2a347
ansi name for clear-scrollback code (#14184)
Related to #14181

# Description

Our understanding of `ESC[3J` has apparently been wrong. And I say "our"
because I posted a [Super User
answer](https://superuser.com/a/1738611/1210833) a couple of years ago
with the same misconception (now fixed). In addition, the [crossterm
crate
doc](https://docs.rs/crossterm/latest/crossterm/terminal/enum.ClearType.html)
is wrong on the topic.

`ESC[3J` doesn't clear the screen plus the scrollback; it *only* clears
the scrollback. Reference the official [Xterm Control Sequences
doc](https://www.xfree86.org/4.8.0/ctlseqs.html).

> CSI P s J
> 
> Erase in Display (ED)
> 
> P s = 0 → Erase Below (default)
> P s = 1 → Erase Above
> P s = 2 → Erase All
> P s = 3 → Erase Saved Lines (xterm)

This also means that:

```nu
$"(ansi clear_entire_screen_plus_buffer)"
```

... doesn't.

This PR updates it to `ansi clear_scrollback_buffer` (short-code remains
the same).

# User-Facing Changes

Breaking-change: `ansi clear_entire_screen_plus_buffer` is renamed `ansi
clear_scrollback_buffer`

# Tests + Formatting

- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

# After Submitting

Self-documenting command via `ansi -l`
2024-10-29 07:01:32 -05:00
..
ansi_.rs ansi name for clear-scrollback code (#14184) 2024-10-29 07:01:32 -05:00
char_.rs update format signature to allow record to be passed in (#9898) 2023-08-02 10:57:58 -05:00
kill.rs Use variable names directly in the format strings (#7906) 2023-01-29 19:37:54 -06:00
mod.rs refactor: move du from platform to filesystem (#11852) 2024-02-15 06:55:21 +08:00