fix clippy

codex-rs/tui/src/app.rs

@@ -182,6 +182,23 @@ impl App<'_> {
         self.app_event_tx.clone()
     }
 
+    /// Clear the entire screen and re-anchor the viewport at the very top-left.
+    /// Generic over backend so we can unit-test with `TestBackend`.
+    fn clear_to_top_generic<B: ratatui::backend::Backend>(
+        terminal: &mut crate::custom_terminal::Terminal<B>,
+    ) {
+        let mut area = terminal.viewport_area;
+        area.y = 0;
+        terminal.set_viewport_area(area);
+
+        let _ = terminal.set_cursor_position((0, 0));
+        let _ = terminal
+            .backend_mut()
+            .clear_region(ratatui::backend::ClearType::All);
+
+        let _ = terminal.clear();
+    }
+
     /// Schedule a redraw if one is not already pending.
     #[allow(clippy::unwrap_used)]
     fn schedule_redraw(&self) {
@@ -236,6 +253,16 @@ impl App<'_> {
                                 self.app_event_tx.send(AppEvent::ExitRequest);
                             }
                         },
+                        KeyEvent {
+                            code: KeyCode::Char('l'),
+                            modifiers: crossterm::event::KeyModifiers::CONTROL,
+                            kind: KeyEventKind::Press,
+                            ..
+                        } => {
+                            // Clear-screen full and re-anchor to top, then redraw.
+                            Self::clear_to_top_generic(terminal);
+                            self.app_event_tx.send(AppEvent::RequestRedraw);
+                        }
                         KeyEvent {
                             code: KeyCode::Esc,
                             kind: KeyEventKind::Press,
@@ -550,3 +577,31 @@ impl App<'_> {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::App;
+    use ratatui::backend::TestBackend;
+    use ratatui::layout::Rect;
+
+    #[test]
+    fn ctrl_l_clear_reanchors_viewport_and_moves_cursor() -> std::io::Result<()> {
+        // Build a test terminal with a small screen and a viewport offset.
+        let backend = TestBackend::new(20, 6);
+        let mut term = crate::custom_terminal::Terminal::with_options(backend)?;
+
+        // Simulate a viewport not at the top (e.g., after history insertions).
+        term.set_viewport_area(Rect::new(0, 3, 20, 2));
+        assert_eq!(term.viewport_area.y, 3);
+
+        // Invoke the same logic used by the Ctrl+L handler.
+        App::clear_to_top_generic(&mut term);
+
+        // Viewport should be re-anchored at the top and cursor at (0,0).
+        assert_eq!(term.viewport_area.y, 0);
+        let pos = term.get_cursor_position()?;
+        assert_eq!(pos.x, 0);
+        assert_eq!(pos.y, 0);
+        Ok(())
+    }
+}