vim: binding fixes (#2637)

Release Notes:

- In vim mode you can now use count modifiers with arrow keys (`5<down>`
will go down 5 lines).
- In vim mode `ctrl+]` and `ctrl+o` now work to go to definition and
back

assets/keymaps/vim.json

@@ -25,11 +25,15 @@
         }
       ],
       "h": "vim::Left",
+      "left": "vim::Left",
       "backspace": "vim::Backspace",
       "j": "vim::Down",
+      "down": "vim::Down",
       "enter": "vim::NextLineStart",
       "k": "vim::Up",
+      "up": "vim::Up",
       "l": "vim::Right",
+      "right": "vim::Right",
       "$": "vim::EndOfLine",
       "shift-g": "vim::EndOfDocument",
       "w": "vim::NextWordStart",
@@ -90,6 +94,8 @@
           }
         }
       ],
+      "ctrl-o": "pane::GoBack",
+      "ctrl-]": "editor::GoToDefinition",
       "escape": "editor::Cancel",
       "0": "vim::StartOfLine", // When no number operator present, use start of line motion
       "1": [
@@ -185,7 +191,6 @@
       "p": "vim::Paste",
       "u": "editor::Undo",
       "ctrl-r": "editor::Redo",
-      "ctrl-o": "pane::GoBack",
       "/": [
         "buffer_search::Deploy",
         {

crates/vim/src/test.rs

@@ -98,3 +98,14 @@ async fn test_buffer_search(cx: &mut gpui::TestAppContext) {
         assert_eq!(bar.query_editor.read(cx).text(cx), "jumps");
     })
 }
+
+#[gpui::test]
+async fn test_count_down(cx: &mut gpui::TestAppContext) {
+    let mut cx = VimTestContext::new(cx, true).await;
+
+    cx.set_state(indoc! {"aˇa\nbb\ncc\ndd\nee"}, Mode::Normal);
+    cx.simulate_keystrokes(["2", "down"]);
+    cx.assert_editor_state("aa\nbb\ncˇc\ndd\nee");
+    cx.simulate_keystrokes(["9", "down"]);
+    cx.assert_editor_state("aa\nbb\ncc\ndd\neˇe");
+}