fix: avoid renders for passive mouse motion (#1872)

refs #1865

1 files changed, 39 insertions, 0 deletions

diff --git a/src/app/mod.rs b/src/app/mod.rs
index c2d479b3..e9aa24b6 100644
--- a/src/app/mod.rs
+++ b/src/app/mod.rs
@@ -5762,6 +5762,45 @@ last_pane = "prefix+tab"
     }
 
     #[tokio::test]
+    async fn popup_mouse_motion_preserves_scrollback() {
+        let mut app = test_app();
+        app.state.mode = Mode::Terminal;
+        app.state.view.terminal_area = ratatui::layout::Rect::new(0, 0, 80, 24);
+        let (popup_runtime, mut popup_rx) = TerminalRuntime::test_with_channel_and_scrollback_bytes(
+            40,
+            2,
+            1024,
+            b"one\r\ntwo\r\nthree\r\n\x1b[?1003h\x1b[?1006h",
+            4,
+        );
+        popup_runtime.scroll_up(1);
+        assert!(popup_runtime
+            .scroll_metrics()
+            .is_some_and(|metrics| metrics.offset_from_bottom > 0));
+        app.install_test_popup_runtime(popup_runtime);
+        let (_, inner) =
+            crate::ui::popup_pane_rects(&app.state, app.state.view.terminal_area).unwrap();
+
+        app.route_client_events(
+            vec![crate::raw_input::RawInputEvent::Mouse(
+                crossterm::event::MouseEvent {
+                    kind: crossterm::event::MouseEventKind::Moved,
+                    column: inner.x + 1,
+                    row: inner.y,
+                    modifiers: crossterm::event::KeyModifiers::NONE,
+                },
+            )],
+            true,
+        );
+
+        assert!(popup_rx.try_recv().is_ok());
+        assert!(app
+            .popup_runtime()
+            .and_then(TerminalRuntime::scroll_metrics)
+            .is_some_and(|metrics| metrics.offset_from_bottom > 0));
+    }
+
+    #[tokio::test]
     async fn route_client_events_routes_popup_mouse_when_global_capture_is_disabled() {
         let mut app = test_app();
         let mut workspace = Workspace::test_new("tiled");