feat: support macOS modified backspace deletion

src/tui.rs

@@ -882,6 +882,14 @@ fn typing_ready(
 }
 
 fn translate(key: KeyEvent) -> Option<Input> {
+    #[cfg(target_os = "macos")]
+    if key.code == KeyCode::Backspace {
+        match key.modifiers {
+            KeyModifiers::ALT => return Some(Input::AltBackspace),
+            KeyModifiers::SUPER => return Some(Input::SuperBackspace),
+            _ => {}
+        }
+    }
     if key
         .modifiers
         .intersects(KeyModifiers::SUPER | KeyModifiers::HYPER | KeyModifiers::META)
@@ -10025,6 +10033,59 @@ end
         }
     }
 
+    #[cfg(target_os = "macos")]
+    #[test]
+    fn macos_modified_backspace_edits_words_and_line_prefix_from_terminal_events() {
+        let directory = Directory::new();
+        let path = directory.file("input.txt", "before\nalpha βeta   SUFFIX\nlast");
+        let mut session = EditorSession::open(Some(path), vec![], None).unwrap();
+        session.handle(Input::Down);
+        session.handle(Input::Home);
+        session.handle(Input::Char('i'));
+        for _ in 0..13 {
+            session.handle(Input::Right);
+        }
+        session.handle(translate(KeyEvent::new(KeyCode::Backspace, KeyModifiers::ALT)).unwrap());
+        assert_eq!(session.editor().lines(), ["before", "alpha SUFFIX", "last"]);
+        session.handle(translate(KeyEvent::new(KeyCode::Backspace, KeyModifiers::SUPER)).unwrap());
+        assert_eq!(session.editor().lines(), ["before", "SUFFIX", "last"]);
+
+        for modifiers in [
+            KeyModifiers::META,
+            KeyModifiers::HYPER,
+            KeyModifiers::ALT | KeyModifiers::CONTROL,
+            KeyModifiers::ALT | KeyModifiers::SHIFT,
+            KeyModifiers::SUPER | KeyModifiers::CONTROL,
+            KeyModifiers::SUPER | KeyModifiers::SHIFT,
+            KeyModifiers::SUPER | KeyModifiers::ALT,
+            KeyModifiers::SUPER | KeyModifiers::META,
+        ] {
+            assert_eq!(
+                translate(KeyEvent::new(KeyCode::Backspace, modifiers)),
+                None
+            );
+        }
+        assert_eq!(
+            translate(KeyEvent::new(KeyCode::Char('a'), KeyModifiers::SUPER)),
+            None
+        );
+    }
+
+    #[cfg(not(target_os = "macos"))]
+    #[test]
+    fn modified_backspace_keeps_non_macos_terminal_defaults() {
+        for modifiers in [KeyModifiers::ALT, KeyModifiers::SUPER] {
+            assert_eq!(
+                translate(KeyEvent::new(KeyCode::Backspace, modifiers)),
+                None
+            );
+        }
+        assert_eq!(
+            translate(KeyEvent::new(KeyCode::Backspace, KeyModifiers::CONTROL)),
+            Some(Input::Backspace)
+        );
+    }
+
     #[test]
     fn wheel_routes_to_floating_and_unfocused_docked_files_without_changing_selection() {
         let directory = Directory::new();