Range formatting

[MichaReiser]

For IDE integration, it would be great if it was possible to select a certain range of code and only format that range.

[T-256]

Thats cool, not just one range, but batch range formatting.

[MichaReiser]

Thats cool, not just one range, but batch range formatting.

Oh, I didn't know about that. We'll start with one range but being aware of multi range formatting may help us to decide on the design

[MichaReiser]

Relevant code in Rome/Biome

https://github.com/biomejs/biome/blob/92be3f8fc3c13bd3ab7827b828bc4167db1d5ee0/crates/rome_formatter/src/lib.rs#L1059-L1307

[konstin]

do you know what's the use case for this from the editor side?

[MichaReiser]

I assume it's to speed up "Format changed code" when saving a file with multiple non-overlapping changed ranges.

[KraXen72]

do you know what's the use case for this from the editor side?

For example, VSCode's format selection command. i use it most of the time instead of formatting the entire document.

[konstin]

Current state (only very basic statement range formatting): https://github.com/astral-sh/ruff/tree/range-formatting

[skykasko]

FYI, this capability has recently been added to Black (psf/black#4020).

[LazyRen]

do you know what's the use case for this from the editor side?

Addition to the format selection command, it seems Format on Save Mode: modifications also depend on this feature.

Currently, Ruff doesn't format the document automatically even if format on save is enabled if Format on Save Mode is set to modifications.