feat: touch resize, move, window menu

winit-wayland/src/seat/touch/mod.rs

@@ -19,7 +19,7 @@ impl TouchHandler for WinitState {
         _: &Connection,
         _: &QueueHandle<Self>,
         touch: &WlTouch,
-        _: u32,
+        serial: u32,
         _: u32,
         surface: WlSurface,
         id: i32,
@@ -27,7 +27,12 @@ impl TouchHandler for WinitState {
     ) {
         let window_id = crate::make_wid(&surface);
         let scale_factor = match self.windows.get_mut().get(&window_id) {
-            Some(window) => window.lock().unwrap().scale_factor(),
+            Some(window) => {
+                let mut window = window.lock().unwrap();
+                // Remember the serial so drag/resize requests can use it while the finger is down.
+                window.touch_down = Some((touch.seat().clone(), serial));
+                window.scale_factor()
+            },
             None => return,
         };
 
@@ -105,8 +110,15 @@ impl TouchHandler for WinitState {
         }
 
         let window_id = crate::make_wid(&touch_point.surface);
+        let still_touched = seat_state.touch_map.values().any(|p| p.surface == touch_point.surface);
         let scale_factor = match self.windows.get_mut().get(&window_id) {
-            Some(window) => window.lock().unwrap().scale_factor(),
+            Some(window) => {
+                let mut window = window.lock().unwrap();
+                if !still_touched {
+                    window.touch_down = None;
+                }
+                window.scale_factor()
+            },
             None => return,
         };
 
@@ -193,7 +205,11 @@ impl TouchHandler for WinitState {
         for (id, touch_point) in seat_state.touch_map.drain() {
             let window_id = crate::make_wid(&touch_point.surface);
             let scale_factor = match self.windows.get_mut().get(&window_id) {
-                Some(window) => window.lock().unwrap().scale_factor(),
+                Some(window) => {
+                    let mut window = window.lock().unwrap();
+                    window.touch_down = None;
+                    window.scale_factor()
+                },
                 None => return,
             };
 

winit-wayland/src/window/state.rs

@@ -69,6 +69,9 @@ pub struct WindowState {
     /// The pointers observed on the window.
     pub pointers: Vec<Weak<ThemedPointer<WinitPointerData>>>,
 
+    /// The seat and serial of the touch currently down on the window, if any.
+    pub touch_down: Option<(WlSeat, u32)>,
+
     selected_cursor: SelectedCursor,
 
     /// Whether the cursor is visible.
@@ -224,6 +227,7 @@ impl WindowState {
             min_surface_size: MIN_WINDOW_SIZE,
             pointer_constraints,
             pointers: Default::default(),
+            touch_down: None,
             queue_handle: queue_handle.clone(),
             resizable: true,
             scale_factor: 1.,
@@ -414,7 +418,11 @@ impl WindowState {
     pub fn drag_resize_window(&self, direction: ResizeDirection) -> Result<(), RequestError> {
         let xdg_toplevel = self.window.xdg_toplevel();
 
-        // TODO(kchibisov) handle touch serials.
+        if let Some((seat, serial)) = &self.touch_down {
+            xdg_toplevel.resize(seat, *serial, resize_direction_to_xdg(direction));
+            return Ok(());
+        }
+
         self.apply_on_pointer(|_, data| {
             let serial = data.latest_button_serial();
             let seat = data.seat();
@@ -427,7 +435,11 @@ impl WindowState {
     /// Start the window drag.
     pub fn drag_window(&self) -> Result<(), RequestError> {
         let xdg_toplevel = self.window.xdg_toplevel();
-        // TODO(kchibisov) handle touch serials.
+        if let Some((seat, serial)) = &self.touch_down {
+            xdg_toplevel._move(seat, *serial);
+            return Ok(());
+        }
+
         self.apply_on_pointer(|_, data| {
             let serial = data.latest_button_serial();
             let seat = data.seat();
@@ -916,7 +928,11 @@ impl WindowState {
     }
 
     pub fn show_window_menu(&self, position: LogicalPosition<u32>) {
-        // TODO(kchibisov) handle touch serials.
+        if let Some((seat, serial)) = &self.touch_down {
+            self.window.show_window_menu(seat, *serial, position.into());
+            return;
+        }
+
         self.apply_on_pointer(|_, data| {
             let serial = data.latest_button_serial();
             let seat = data.seat();