2fae4c7c72
Improves Helix compatibility by making the Indent keybinds `<` and `>` no longer deselect lines if they're selected. Post Indent action current Zed release: <img width="485" height="271" alt="image" src="https://github.com/user-attachments/assets/41fd3d94-9c89-49dd-adc5-f696dbd79827" /> (Cursor is on the beginning of the first line) Post Indent action in Helix: <img width="376" height="144" alt="image" src="https://github.com/user-attachments/assets/fdd1a489-cf3a-4638-9199-3adffa63ef61" /> Post Indent action in this PR: <img width="463" height="300" alt="image" src="https://github.com/user-attachments/assets/8edd3b81-e446-4b55-bc90-61cac3661ed7" /> Release Notes: - Fixed selected lines indented with `<` and `>` deselecting in Helix mode
This contains the code for Zed's Vim emulation mode.
Vim mode in Zed is supposed to primarily "do what you expect": it mostly tries to copy vim exactly, but will use Zed-specific functionality when available to make things smoother. This means Zed will never be 100% vim compatible, but should be 100% vim familiar!
The backlog is maintained in the #vim channel notes.
Testing against Neovim
If you are making a change to make Zed's behavior more closely match vim/nvim, you can create a test using the NeovimBackedTestContext.
For example, the following test checks that Zed and Neovim have the same behavior when running * in visual mode:
#[gpui::test]
async fn test_visual_star_hash(cx: &mut gpui::TestAppContext) {
let mut cx = NeovimBackedTestContext::new(cx).await;
cx.set_shared_state("ˇa.c. abcd a.c. abcd").await;
cx.simulate_shared_keystrokes(["v", "3", "l", "*"]).await;
cx.assert_shared_state("a.c. abcd ˇa.c. abcd").await;
}
To keep CI runs fast, by default the neovim tests use a cached JSON file that records what neovim did (see crates/vim/test_data), but while developing this test you'll need to run it with the neovim flag enabled:
cargo test -p vim --features neovim test_visual_star_hash
This will run your keystrokes against a headless neovim and cache the results in the test_data directory. Note that neovim must be installed and reachable on your $PATH in order to run the feature.
Testing zed-only behavior
Zed does more than vim/neovim in their default modes. The VimTestContext can be used instead. This lets you test integration with the language server and other parts of zed's UI that don't have a NeoVim equivalent.