zed/crates/vim
Kevin Sweet 5e869dadf9
Fix ctrl-d/u issues with scroll_beyond_last_line off (#15395)
Closes #15356

Release Notes:

- vim: Fixed issues with `ctrl-d`/`ctrl-u` when
`scroll_beyond_last_line` is set to `off`
([#15356](https://github.com/zed-industries/zed/issues/15356)).


https://github.com/user-attachments/assets/d3166393-4a4e-4195-9db6-3ff1d4aeec78

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>
2024-08-23 08:34:40 -06:00
..
src Fix ctrl-d/u issues with scroll_beyond_last_line off (#15395) 2024-08-23 08:34:40 -06:00
test_data Fix ctrl-d/u issues with scroll_beyond_last_line off (#15395) 2024-08-23 08:34:40 -06:00
Cargo.toml Replace lazy_static with std::sync::LazyLock (#16066) 2024-08-20 14:27:33 -04:00
LICENSE-GPL chore: Change AGPL-licensed crates to GPL (except for collab) (#4231) 2024-01-24 00:26:58 +01:00
README.md Docs Party 2024 (#15876) 2024-08-09 13:37:54 -04:00

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.

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.