feat: add configurable Space leader bindings

src/tui.rs

@@ -341,6 +341,9 @@ fn draw(frame: &mut Frame, editor: &Editor, top: &mut usize, left: &mut usize) {
         .map(|c| if c.is_control() { '�' } else { c })
         .collect();
     let mut status = format!(" {}", editor.mode());
+    if let Some(sequence) = editor.leader_pending() {
+        write!(status, "  leader: {sequence}").unwrap();
+    }
     if editor.buffer_count() > 1 {
         write!(
             status,
@@ -545,6 +548,54 @@ mod tests {
             .join("\n")
     }
 
+    #[test]
+    fn pending_leader_is_visible_before_long_paths_and_unknown_keys_do_not_edit() {
+        let directory = Directory::new();
+        let path = directory.file(&"long-path-".repeat(12), "keep");
+        let mut editor = Editor::open(Some(path), vec![]).unwrap();
+        let mut terminal = Terminal::new(ratatui::backend::TestBackend::new(40, 6)).unwrap();
+        let (mut top, mut left) = (0, 0);
+        editor.handle(Input::Char(' '));
+        editor.handle(Input::Char('b'));
+        terminal
+            .draw(|frame| draw(frame, &editor, &mut top, &mut left))
+            .unwrap();
+        assert!(screen_text(&terminal).contains("leader: Space b"));
+        editor.handle(Input::Char('x'));
+        terminal
+            .draw(|frame| draw(frame, &editor, &mut top, &mut left))
+            .unwrap();
+        assert!(!screen_text(&terminal).contains("leader:"));
+        assert_eq!(editor.lines(), &["keep"]);
+        assert_eq!(editor.cursor(), crate::editor::Cursor::default());
+        assert_eq!(editor.mode(), Mode::Normal);
+    }
+
+    #[test]
+    fn palette_advertises_effective_leader_sequences_after_remapping() {
+        let mut editor = Editor::open(None, vec![]).unwrap();
+        editor.set_leader(",").unwrap();
+        editor.handle(Input::Ctrl('p'));
+        for ch in "bnext".chars() {
+            editor.handle(Input::Char(ch));
+        }
+        let mut terminal = Terminal::new(ratatui::backend::TestBackend::new(100, 10)).unwrap();
+        let (mut top, mut left) = (0, 0);
+        terminal
+            .draw(|frame| draw(frame, &editor, &mut top, &mut left))
+            .unwrap();
+        assert!(screen_text(&terminal).contains(", b n"));
+        assert!(!screen_text(&terminal).contains("Space b n"));
+        editor
+            .bind("normal", ",", Some("core.command".into()))
+            .unwrap();
+        terminal
+            .draw(|frame| draw(frame, &editor, &mut top, &mut left))
+            .unwrap();
+        assert!(screen_text(&terminal).contains("unbound"));
+        assert!(!screen_text(&terminal).contains(", b n"));
+    }
+
     #[test]
     fn buffer_switches_restore_independent_vertical_and_horizontal_viewports() {
         let directory = Directory::new();