refactor: split window state

adapters/src/wayland/shell_adapter.rs

@@ -5,8 +5,8 @@ use crate::wayland::{
     surfaces::layer_surface::{SurfaceCtx, SurfaceSetupParams},
     surfaces::popup_manager::{CreatePopupParams, PopupContext, PopupManager},
     surfaces::{
-        surface_builder::WindowStateBuilder,
-        surface_state::{SharedPointerSerial, WindowState},
+        scale_coordinator::SharedPointerSerial, surface_builder::WindowStateBuilder,
+        surface_state::WindowState,
     },
 };
 use crate::{
@@ -181,7 +181,9 @@ impl WaylandWindowingSystem {
 
             let serial = serial_holder.get();
 
-            let (params, request) = if let Some((request, width, height)) = popup_service_clone.take_pending_popup() {
+            let (params, request) = if let Some((request, width, height)) =
+                popup_service_clone.take_pending_popup()
+            {
                 log::info!(
                     "Using popup request: component='{}', position=({}, {}), size={}x{}, mode={:?}",
                     request.component,
@@ -204,18 +206,14 @@ impl WaylandWindowingSystem {
             } else {
                 log::warn!("Popup creator called without pending popup request - aborting");
                 return Err(PlatformError::Other(
-                    "No popup request available - cannot create popup without parameters".to_string()
+                    "No popup request available - cannot create popup without parameters"
+                        .to_string(),
                 ));
             };
 
             let popup_window = popup_service_clone
                 .manager()
-                .create_popup(
-                    &queue_handle,
-                    &layer_surface,
-                    params,
-                    request,
-                )
+                .create_popup(&queue_handle, &layer_surface, params, request)
                 .map_err(|e| PlatformError::Other(format!("Failed to create popup: {e}")))?;
 
             let result = Ok(popup_window as Rc<dyn WindowAdapter>);

adapters/src/wayland/surfaces/event_router.rs

@@ -0,0 +1,51 @@
+use crate::rendering::femtovg::main_window::FemtoVGWindow;
+use crate::wayland::services::popup_service::{ActiveWindow, PopupService};
+use layer_shika_domain::value_objects::popup_request::PopupHandle;
+use slint::platform::{WindowAdapter, WindowEvent};
+use std::rc::Rc;
+use wayland_client::{backend::ObjectId, protocol::wl_surface::WlSurface};
+
+pub struct EventRouter {
+    main_window: Rc<FemtoVGWindow>,
+    popup_service: Option<Rc<PopupService>>,
+    main_surface_id: ObjectId,
+}
+
+impl EventRouter {
+    #[must_use]
+    pub const fn new(main_window: Rc<FemtoVGWindow>, main_surface_id: ObjectId) -> Self {
+        Self {
+            main_window,
+            popup_service: None,
+            main_surface_id,
+        }
+    }
+
+    pub fn set_popup_service(&mut self, popup_service: Rc<PopupService>) {
+        self.popup_service = Some(popup_service);
+    }
+
+    pub fn find_window_for_surface(&mut self, surface: &WlSurface) {
+        if let Some(popup_service) = &self.popup_service {
+            popup_service.find_window_for_surface(surface, &self.main_surface_id);
+        }
+    }
+
+    pub fn dispatch_to_active_window(&self, event: WindowEvent) {
+        if let Some(popup_service) = &self.popup_service {
+            match popup_service.active_window() {
+                Some(ActiveWindow::Main) => {
+                    self.main_window.window().dispatch_event(event);
+                }
+                Some(ActiveWindow::Popup(index)) => {
+                    if let Some(popup_window) =
+                        popup_service.get_popup_window(PopupHandle::new(index))
+                    {
+                        popup_window.dispatch_event(event);
+                    }
+                }
+                None => {}
+            }
+        }
+    }
+}

adapters/src/wayland/surfaces/mod.rs

@@ -1,6 +1,10 @@
 pub mod dimensions;
+pub mod event_router;
 pub mod layer_surface;
+pub mod popup_coordinator;
 pub mod popup_manager;
 pub mod popup_surface;
+pub mod scale_coordinator;
 pub mod surface_builder;
 pub mod surface_state;
+pub mod window_renderer;

adapters/src/wayland/surfaces/popup_coordinator.rs

@@ -0,0 +1,77 @@
+use crate::wayland::services::popup_service::PopupService;
+use crate::wayland::surfaces::popup_manager::PopupManager;
+use slint::PhysicalSize;
+use std::rc::Rc;
+use wayland_protocols::wp::fractional_scale::v1::client::wp_fractional_scale_v1::WpFractionalScaleV1;
+
+pub struct PopupCoordinator {
+    popup_service: Option<Rc<PopupService>>,
+}
+
+impl Default for PopupCoordinator {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl PopupCoordinator {
+    #[must_use]
+    pub const fn new() -> Self {
+        Self {
+            popup_service: None,
+        }
+    }
+
+    pub fn set_popup_service(&mut self, popup_service: Rc<PopupService>) {
+        self.popup_service = Some(popup_service);
+    }
+
+    pub fn set_popup_manager(&mut self, popup_manager: Rc<PopupManager>) {
+        self.popup_service = Some(Rc::new(PopupService::new(popup_manager)));
+    }
+
+    pub fn update_output_size(&self, output_size: PhysicalSize) {
+        if let Some(popup_service) = &self.popup_service {
+            popup_service.update_output_size(output_size);
+        }
+    }
+
+    pub fn update_scale_factor(&self, scale_factor: f32) {
+        if let Some(popup_service) = &self.popup_service {
+            popup_service.update_scale_factor(scale_factor);
+        }
+    }
+
+    pub fn clear_active_window(&mut self) {
+        if let Some(popup_service) = &self.popup_service {
+            popup_service.clear_active_window();
+        }
+    }
+
+    pub fn clear_active_window_if_popup(&mut self, popup_key: usize) {
+        if let Some(popup_service) = &self.popup_service {
+            popup_service.clear_active_window_if_popup(popup_key);
+        }
+    }
+
+    pub const fn popup_service(&self) -> &Option<Rc<PopupService>> {
+        &self.popup_service
+    }
+
+    pub fn popup_manager(&self) -> Option<Rc<PopupManager>> {
+        self.popup_service
+            .as_ref()
+            .map(|service| Rc::clone(service.manager()))
+    }
+
+    pub fn update_scale_for_fractional_scale_object(
+        &self,
+        fractional_scale_proxy: &WpFractionalScaleV1,
+        scale_120ths: u32,
+    ) {
+        if let Some(popup_service) = &self.popup_service {
+            popup_service
+                .update_scale_for_fractional_scale_object(fractional_scale_proxy, scale_120ths);
+        }
+    }
+}

adapters/src/wayland/surfaces/scale_coordinator.rs

@@ -0,0 +1,99 @@
+use log::info;
+use slint::LogicalPosition;
+use std::cell::RefCell;
+use std::rc::Rc;
+
+pub struct SharedPointerSerial {
+    serial: RefCell<u32>,
+}
+
+impl Default for SharedPointerSerial {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl SharedPointerSerial {
+    pub const fn new() -> Self {
+        Self {
+            serial: RefCell::new(0),
+        }
+    }
+
+    pub fn update(&self, serial: u32) {
+        *self.serial.borrow_mut() = serial;
+    }
+
+    pub fn get(&self) -> u32 {
+        *self.serial.borrow()
+    }
+}
+
+pub struct ScaleCoordinator {
+    scale_factor: f32,
+    current_pointer_position: LogicalPosition,
+    last_pointer_serial: u32,
+    shared_pointer_serial: Option<Rc<SharedPointerSerial>>,
+    has_fractional_scale: bool,
+}
+
+impl ScaleCoordinator {
+    #[must_use]
+    pub const fn new(scale_factor: f32, has_fractional_scale: bool) -> Self {
+        Self {
+            scale_factor,
+            current_pointer_position: LogicalPosition::new(0.0, 0.0),
+            last_pointer_serial: 0,
+            shared_pointer_serial: None,
+            has_fractional_scale,
+        }
+    }
+
+    pub const fn scale_factor(&self) -> f32 {
+        self.scale_factor
+    }
+
+    #[allow(clippy::cast_precision_loss)]
+    pub fn update_scale_factor(&mut self, scale_120ths: u32) -> f32 {
+        let new_scale_factor = scale_120ths as f32 / 120.0;
+        let old_scale_factor = self.scale_factor;
+        info!(
+            "Updating scale factor from {} to {} ({}x)",
+            old_scale_factor, new_scale_factor, scale_120ths
+        );
+        self.scale_factor = new_scale_factor;
+        new_scale_factor
+    }
+
+    #[allow(clippy::cast_possible_truncation)]
+    pub fn set_current_pointer_position(&mut self, physical_x: f64, physical_y: f64) {
+        let logical_position = if self.has_fractional_scale {
+            LogicalPosition::new(physical_x as f32, physical_y as f32)
+        } else {
+            LogicalPosition::new(
+                (physical_x / f64::from(self.scale_factor)) as f32,
+                (physical_y / f64::from(self.scale_factor)) as f32,
+            )
+        };
+        self.current_pointer_position = logical_position;
+    }
+
+    pub const fn current_pointer_position(&self) -> LogicalPosition {
+        self.current_pointer_position
+    }
+
+    pub const fn last_pointer_serial(&self) -> u32 {
+        self.last_pointer_serial
+    }
+
+    pub fn set_last_pointer_serial(&mut self, serial: u32) {
+        self.last_pointer_serial = serial;
+        if let Some(ref shared_serial) = self.shared_pointer_serial {
+            shared_serial.update(serial);
+        }
+    }
+
+    pub fn set_shared_pointer_serial(&mut self, shared_serial: Rc<SharedPointerSerial>) {
+        self.shared_pointer_serial = Some(shared_serial);
+    }
+}

adapters/src/wayland/surfaces/surface_state.rs

@@ -1,81 +1,37 @@
 use std::rc::Rc;
 use super::surface_builder::WindowStateBuilder;
-use super::dimensions::SurfaceDimensionsExt;
+use super::event_router::EventRouter;
+use super::popup_coordinator::PopupCoordinator;
 use super::popup_manager::PopupManager;
+use super::scale_coordinator::{ScaleCoordinator, SharedPointerSerial};
+use super::window_renderer::{WindowRenderer, WindowRendererParams};
 use crate::wayland::managed_proxies::{
     ManagedWlPointer, ManagedWlSurface, ManagedZwlrLayerSurfaceV1,
     ManagedWpFractionalScaleV1, ManagedWpViewport,
 };
-use crate::wayland::services::popup_service::{ActiveWindow, PopupService};
+use crate::wayland::services::popup_service::PopupService;
 use crate::rendering::femtovg::main_window::FemtoVGWindow;
 use crate::errors::{LayerShikaError, Result};
 use core::result::Result as CoreResult;
 use layer_shika_domain::errors::DomainError;
 use layer_shika_domain::ports::windowing::RuntimeStatePort;
-use layer_shika_domain::surface_dimensions::SurfaceDimensions;
-use layer_shika_domain::value_objects::popup_request::PopupHandle;
-use log::{error, info};
 use slint::{LogicalPosition, PhysicalSize, ComponentHandle};
-use slint::platform::{WindowAdapter, WindowEvent};
+use slint::platform::WindowEvent;
 use slint_interpreter::{ComponentInstance, CompilationResult};
 use smithay_client_toolkit::reexports::protocols_wlr::layer_shell::v1::client::zwlr_layer_surface_v1::ZwlrLayerSurfaceV1;
 use wayland_client::{protocol::wl_surface::WlSurface, Proxy};
 use wayland_protocols::wp::fractional_scale::v1::client::wp_fractional_scale_v1::WpFractionalScaleV1;
-use std::cell::RefCell;
-
-pub struct SharedPointerSerial {
-    serial: RefCell<u32>,
-}
-
-impl Default for SharedPointerSerial {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl SharedPointerSerial {
-    pub const fn new() -> Self {
-        Self {
-            serial: RefCell::new(0),
-        }
-    }
-
-    pub fn update(&self, serial: u32) {
-        *self.serial.borrow_mut() = serial;
-    }
-
-    pub fn get(&self) -> u32 {
-        *self.serial.borrow()
-    }
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-enum ScalingMode {
-    FractionalWithViewport,
-    FractionalOnly,
-    Integer,
-}
 
 pub struct WindowState {
     component_instance: ComponentInstance,
     compilation_result: Option<Rc<CompilationResult>>,
-    viewport: Option<ManagedWpViewport>,
-    fractional_scale: Option<ManagedWpFractionalScaleV1>,
-    layer_surface: ManagedZwlrLayerSurfaceV1,
-    surface: ManagedWlSurface,
     #[allow(dead_code)]
     pointer: ManagedWlPointer,
-    window: Rc<FemtoVGWindow>,
-    height: u32,
-    exclusive_zone: i32,
-    popup_service: Option<Rc<PopupService>>,
-    size: PhysicalSize,
-    logical_size: PhysicalSize,
+    renderer: WindowRenderer,
+    event_router: EventRouter,
+    popup_coordinator: PopupCoordinator,
+    scale_coordinator: ScaleCoordinator,
     output_size: PhysicalSize,
-    current_pointer_position: LogicalPosition,
-    last_pointer_serial: u32,
-    shared_pointer_serial: Option<Rc<SharedPointerSerial>>,
-    scale_factor: f32,
 }
 
 impl WindowState {
@@ -131,169 +87,74 @@ impl WindowState {
             .map(|fs| ManagedWpFractionalScaleV1::new(fs, Rc::clone(&connection)));
         let layer_surface =
             ManagedZwlrLayerSurfaceV1::new(layer_surface_rc, Rc::clone(&connection));
-        let surface = ManagedWlSurface::new(surface_rc, Rc::clone(&connection));
+        let surface = ManagedWlSurface::new(Rc::clone(&surface_rc), Rc::clone(&connection));
         let pointer = ManagedWlPointer::new(pointer_rc, connection);
 
+        let has_fractional_scale = fractional_scale.is_some();
+        let size = builder.size.unwrap_or_default();
+
+        let renderer = WindowRenderer::new(WindowRendererParams {
+            window: Rc::clone(&window),
+            surface,
+            layer_surface,
+            viewport,
+            fractional_scale,
+            height: builder.height,
+            exclusive_zone: builder.exclusive_zone,
+            size,
+        });
+
+        let main_surface_id = (*surface_rc).id();
+        let event_router = EventRouter::new(Rc::clone(&window), main_surface_id);
+        let popup_coordinator = PopupCoordinator::new();
+        let scale_coordinator = ScaleCoordinator::new(builder.scale_factor, has_fractional_scale);
+
         Ok(Self {
             component_instance,
             compilation_result: builder.compilation_result,
-            viewport,
-            fractional_scale,
-            layer_surface,
-            surface,
             pointer,
-            window,
-            height: builder.height,
-            exclusive_zone: builder.exclusive_zone,
-            popup_service: None,
-            size: builder.size.unwrap_or_default(),
-            logical_size: PhysicalSize::default(),
+            renderer,
+            event_router,
+            popup_coordinator,
+            scale_coordinator,
             output_size: builder.output_size.unwrap_or_default(),
-            current_pointer_position: LogicalPosition::default(),
-            last_pointer_serial: 0,
-            shared_pointer_serial: None,
-            scale_factor: builder.scale_factor,
         })
     }
 
-    const fn determine_scaling_mode(&self) -> ScalingMode {
-        if self.fractional_scale.is_some() && self.viewport.is_some() {
-            ScalingMode::FractionalWithViewport
-        } else if self.fractional_scale.is_some() {
-            ScalingMode::FractionalOnly
-        } else {
-            ScalingMode::Integer
-        }
-    }
-
-    #[allow(clippy::cast_precision_loss)]
-    fn configure_slint_window(&self, dimensions: &SurfaceDimensions, mode: ScalingMode) {
-        match mode {
-            ScalingMode::FractionalWithViewport => {
-                self.window.set_scale_factor(self.scale_factor);
-                self.window
-                    .set_size(slint::WindowSize::Logical(slint::LogicalSize::new(
-                        dimensions.logical_width() as f32,
-                        dimensions.logical_height() as f32,
-                    )));
-            }
-            ScalingMode::FractionalOnly => {
-                self.window
-                    .set_scale_factor(dimensions.buffer_scale() as f32);
-                self.window
-                    .set_size(slint::WindowSize::Logical(slint::LogicalSize::new(
-                        dimensions.logical_width() as f32,
-                        dimensions.logical_height() as f32,
-                    )));
-            }
-            ScalingMode::Integer => {
-                self.window.set_scale_factor(self.scale_factor);
-                self.window.set_size(slint::WindowSize::Physical(
-                    dimensions.to_slint_physical_size(),
-                ));
-            }
-        }
-    }
-
-    #[allow(clippy::cast_possible_wrap)]
-    fn configure_wayland_surface(&self, dimensions: &SurfaceDimensions, mode: ScalingMode) {
-        match mode {
-            ScalingMode::FractionalWithViewport => {
-                self.surface.set_buffer_scale(1);
-                if let Some(viewport) = &self.viewport {
-                    viewport.set_destination(
-                        dimensions.logical_width() as i32,
-                        dimensions.logical_height() as i32,
-                    );
-                }
-            }
-            ScalingMode::FractionalOnly | ScalingMode::Integer => {
-                self.surface.set_buffer_scale(dimensions.buffer_scale());
-            }
-        }
-
-        self.layer_surface
-            .set_size(dimensions.logical_width(), dimensions.logical_height());
-        self.layer_surface.set_exclusive_zone(self.exclusive_zone);
-        self.surface.commit();
-    }
-
     pub fn update_size(&mut self, width: u32, height: u32) {
-        if width == 0 || height == 0 {
-            info!("Skipping update_size with zero dimension: {width}x{height}");
-            return;
-        }
-
-        let scale_factor = self.scale_factor();
-        let dimensions = match SurfaceDimensions::calculate(width, height, scale_factor) {
-            Ok(d) => d,
-            Err(e) => {
-                error!("Failed to calculate surface dimensions: {e}");
-                return;
-            }
-        };
-        let scaling_mode = self.determine_scaling_mode();
-
-        info!(
-            "Updating window size: logical {}x{}, physical {}x{}, scale {}, buffer_scale {}, mode {:?}",
-            dimensions.logical_width(),
-            dimensions.logical_height(),
-            dimensions.physical_width(),
-            dimensions.physical_height(),
-            scale_factor,
-            dimensions.buffer_scale(),
-            scaling_mode
-        );
-
-        self.configure_slint_window(&dimensions, scaling_mode);
-        self.configure_wayland_surface(&dimensions, scaling_mode);
-
-        info!("Window physical size: {:?}", self.window.size());
-
-        self.size = dimensions.to_slint_physical_size();
-        self.logical_size = dimensions.to_slint_logical_size();
-        self.window.request_redraw();
+        let scale_factor = self.scale_coordinator.scale_factor();
+        self.renderer.update_size(width, height, scale_factor);
     }
 
     #[allow(clippy::cast_possible_truncation)]
     pub fn set_current_pointer_position(&mut self, physical_x: f64, physical_y: f64) {
-        let has_fractional_scale = self.fractional_scale.is_some();
-        let logical_position = if has_fractional_scale {
-            LogicalPosition::new(physical_x as f32, physical_y as f32)
-        } else {
-            LogicalPosition::new(
-                (physical_x / f64::from(self.scale_factor)) as f32,
-                (physical_y / f64::from(self.scale_factor)) as f32,
-            )
-        };
-        self.current_pointer_position = logical_position;
+        self.scale_coordinator
+            .set_current_pointer_position(physical_x, physical_y);
     }
 
-    pub const fn size(&self) -> PhysicalSize {
-        self.size
+    pub fn size(&self) -> PhysicalSize {
+        self.renderer.size()
     }
 
-    pub const fn current_pointer_position(&self) -> LogicalPosition {
-        self.current_pointer_position
+    pub fn current_pointer_position(&self) -> LogicalPosition {
+        self.scale_coordinator.current_pointer_position()
     }
 
     pub(crate) fn window(&self) -> Rc<FemtoVGWindow> {
-        Rc::clone(&self.window)
+        Rc::clone(self.renderer.window())
     }
 
     pub(crate) fn layer_surface(&self) -> Rc<ZwlrLayerSurfaceV1> {
-        Rc::clone(self.layer_surface.inner())
+        self.renderer.layer_surface()
     }
 
-    pub const fn height(&self) -> u32 {
-        self.height
+    pub fn height(&self) -> u32 {
+        self.renderer.height()
     }
 
     pub fn set_output_size(&mut self, output_size: PhysicalSize) {
         self.output_size = output_size;
-        if let Some(popup_service) = &self.popup_service {
-            popup_service.update_output_size(output_size);
-        }
+        self.popup_coordinator.update_output_size(output_size);
     }
 
     pub const fn output_size(&self) -> PhysicalSize {
@@ -310,78 +171,54 @@ impl WindowState {
     }
 
     pub fn render_frame_if_dirty(&self) -> Result<()> {
-        self.window.render_frame_if_dirty()
+        self.renderer.render_frame_if_dirty()
     }
 
     #[allow(clippy::cast_precision_loss)]
     pub fn update_scale_factor(&mut self, scale_120ths: u32) {
-        let new_scale_factor = scale_120ths as f32 / 120.0;
-        let old_scale_factor = self.scale_factor;
-        info!(
-            "Updating scale factor from {} to {} ({}x)",
-            old_scale_factor, new_scale_factor, scale_120ths
-        );
-        self.scale_factor = new_scale_factor;
+        let new_scale_factor = self.scale_coordinator.update_scale_factor(scale_120ths);
 
-        if let Some(popup_service) = &self.popup_service {
-            popup_service.update_scale_factor(new_scale_factor);
-        }
+        self.popup_coordinator.update_scale_factor(new_scale_factor);
 
-        let current_logical_size = self.logical_size;
+        let current_logical_size = self.renderer.logical_size();
         if current_logical_size.width > 0 && current_logical_size.height > 0 {
             self.update_size(current_logical_size.width, current_logical_size.height);
         }
     }
 
-    pub const fn scale_factor(&self) -> f32 {
-        self.scale_factor
+    pub fn scale_factor(&self) -> f32 {
+        self.scale_coordinator.scale_factor()
     }
 
-    pub const fn last_pointer_serial(&self) -> u32 {
-        self.last_pointer_serial
+    pub fn last_pointer_serial(&self) -> u32 {
+        self.scale_coordinator.last_pointer_serial()
     }
 
     pub fn set_last_pointer_serial(&mut self, serial: u32) {
-        self.last_pointer_serial = serial;
-        if let Some(ref shared_serial) = self.shared_pointer_serial {
-            shared_serial.update(serial);
-        }
+        self.scale_coordinator.set_last_pointer_serial(serial);
     }
 
     pub fn set_shared_pointer_serial(&mut self, shared_serial: Rc<SharedPointerSerial>) {
-        self.shared_pointer_serial = Some(shared_serial);
+        self.scale_coordinator
+            .set_shared_pointer_serial(shared_serial);
     }
 
     pub fn set_popup_service(&mut self, popup_service: Rc<PopupService>) {
-        self.popup_service = Some(popup_service);
+        self.event_router
+            .set_popup_service(Rc::clone(&popup_service));
+        self.popup_coordinator.set_popup_service(popup_service);
     }
 
     pub fn set_popup_manager(&mut self, popup_manager: Rc<PopupManager>) {
-        self.popup_service = Some(Rc::new(PopupService::new(popup_manager)));
+        self.popup_coordinator.set_popup_manager(popup_manager);
     }
 
     pub fn find_window_for_surface(&mut self, surface: &WlSurface) {
-        if let Some(popup_service) = &self.popup_service {
-            popup_service.find_window_for_surface(surface, &(**self.surface.inner()).id());
-        }
+        self.event_router.find_window_for_surface(surface);
     }
 
     pub fn dispatch_to_active_window(&self, event: WindowEvent) {
-        if let Some(popup_service) = &self.popup_service {
-            match popup_service.active_window() {
-                Some(ActiveWindow::Main) => {
-                    self.window.window().dispatch_event(event);
-                }
-                Some(ActiveWindow::Popup(index)) => {
-                    if let Some(popup_window) =
-                        popup_service.get_popup_window(PopupHandle::new(index))
-                    {
-                        popup_window.dispatch_event(event);
-                    }
-                }
-                None => {}
-            }
-        }
+        self.event_router.dispatch_to_active_window(event);
     }
 
     #[allow(clippy::cast_precision_loss)]
@@ -392,39 +229,32 @@ impl WindowState {
     ) {
         let fractional_scale_id = fractional_scale_proxy.id();
 
-        if let Some(ref main_fractional_scale) = self.fractional_scale {
+        if let Some(main_fractional_scale) = self.renderer.fractional_scale() {
             if (**main_fractional_scale.inner()).id() == fractional_scale_id {
                 self.update_scale_factor(scale_120ths);
                 return;
             }
         }
 
-        if let Some(popup_service) = &self.popup_service {
-            popup_service
-                .update_scale_for_fractional_scale_object(fractional_scale_proxy, scale_120ths);
-        }
+        self.popup_coordinator
+            .update_scale_for_fractional_scale_object(fractional_scale_proxy, scale_120ths);
     }
 
     pub fn clear_active_window(&mut self) {
-        if let Some(popup_service) = &self.popup_service {
-            popup_service.clear_active_window();
-        }
+        self.popup_coordinator.clear_active_window();
     }
 
     pub fn clear_active_window_if_popup(&mut self, popup_key: usize) {
-        if let Some(popup_service) = &self.popup_service {
-            popup_service.clear_active_window_if_popup(popup_key);
-        }
+        self.popup_coordinator
+            .clear_active_window_if_popup(popup_key);
     }
 
-    pub const fn popup_service(&self) -> &Option<Rc<PopupService>> {
-        &self.popup_service
+    pub fn popup_service(&self) -> &Option<Rc<PopupService>> {
+        self.popup_coordinator.popup_service()
     }
 
     pub fn popup_manager(&self) -> Option<Rc<PopupManager>> {
-        self.popup_service
-            .as_ref()
-            .map(|service| Rc::clone(service.manager()))
+        self.popup_coordinator.popup_manager()
     }
 }
 

adapters/src/wayland/surfaces/window_renderer.rs

@@ -0,0 +1,189 @@
+use crate::errors::Result;
+use crate::rendering::femtovg::main_window::FemtoVGWindow;
+use crate::wayland::managed_proxies::{
+    ManagedWlSurface, ManagedZwlrLayerSurfaceV1, ManagedWpFractionalScaleV1, ManagedWpViewport,
+};
+use crate::wayland::surfaces::dimensions::SurfaceDimensionsExt;
+use layer_shika_domain::surface_dimensions::SurfaceDimensions;
+use log::{error, info};
+use slint::PhysicalSize;
+use smithay_client_toolkit::reexports::protocols_wlr::layer_shell::v1::client::zwlr_layer_surface_v1::ZwlrLayerSurfaceV1;
+use std::rc::Rc;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum ScalingMode {
+    FractionalWithViewport,
+    FractionalOnly,
+    Integer,
+}
+
+pub struct WindowRendererParams {
+    pub window: Rc<FemtoVGWindow>,
+    pub surface: ManagedWlSurface,
+    pub layer_surface: ManagedZwlrLayerSurfaceV1,
+    pub viewport: Option<ManagedWpViewport>,
+    pub fractional_scale: Option<ManagedWpFractionalScaleV1>,
+    pub height: u32,
+    pub exclusive_zone: i32,
+    pub size: PhysicalSize,
+}
+
+pub struct WindowRenderer {
+    window: Rc<FemtoVGWindow>,
+    surface: ManagedWlSurface,
+    layer_surface: ManagedZwlrLayerSurfaceV1,
+    viewport: Option<ManagedWpViewport>,
+    fractional_scale: Option<ManagedWpFractionalScaleV1>,
+    height: u32,
+    exclusive_zone: i32,
+    size: PhysicalSize,
+    logical_size: PhysicalSize,
+}
+
+impl WindowRenderer {
+    #[must_use]
+    pub fn new(params: WindowRendererParams) -> Self {
+        Self {
+            window: params.window,
+            surface: params.surface,
+            layer_surface: params.layer_surface,
+            viewport: params.viewport,
+            fractional_scale: params.fractional_scale,
+            height: params.height,
+            exclusive_zone: params.exclusive_zone,
+            size: params.size,
+            logical_size: PhysicalSize::default(),
+        }
+    }
+
+    pub fn render_frame_if_dirty(&self) -> Result<()> {
+        self.window.render_frame_if_dirty()
+    }
+
+    pub const fn window(&self) -> &Rc<FemtoVGWindow> {
+        &self.window
+    }
+
+    pub fn layer_surface(&self) -> Rc<ZwlrLayerSurfaceV1> {
+        Rc::clone(self.layer_surface.inner())
+    }
+
+    pub const fn height(&self) -> u32 {
+        self.height
+    }
+
+    pub const fn size(&self) -> PhysicalSize {
+        self.size
+    }
+
+    const fn determine_scaling_mode(&self) -> ScalingMode {
+        if self.fractional_scale.is_some() && self.viewport.is_some() {
+            ScalingMode::FractionalWithViewport
+        } else if self.fractional_scale.is_some() {
+            ScalingMode::FractionalOnly
+        } else {
+            ScalingMode::Integer
+        }
+    }
+
+    #[allow(clippy::cast_precision_loss)]
+    fn configure_slint_window(
+        &self,
+        dimensions: &SurfaceDimensions,
+        mode: ScalingMode,
+        scale_factor: f32,
+    ) {
+        match mode {
+            ScalingMode::FractionalWithViewport => {
+                self.window.set_scale_factor(scale_factor);
+                self.window
+                    .set_size(slint::WindowSize::Logical(slint::LogicalSize::new(
+                        dimensions.logical_width() as f32,
+                        dimensions.logical_height() as f32,
+                    )));
+            }
+            ScalingMode::FractionalOnly => {
+                self.window
+                    .set_scale_factor(dimensions.buffer_scale() as f32);
+                self.window
+                    .set_size(slint::WindowSize::Logical(slint::LogicalSize::new(
+                        dimensions.logical_width() as f32,
+                        dimensions.logical_height() as f32,
+                    )));
+            }
+            ScalingMode::Integer => {
+                self.window.set_scale_factor(scale_factor);
+                self.window.set_size(slint::WindowSize::Physical(
+                    dimensions.to_slint_physical_size(),
+                ));
+            }
+        }
+    }
+
+    #[allow(clippy::cast_possible_wrap)]
+    fn configure_wayland_surface(&self, dimensions: &SurfaceDimensions, mode: ScalingMode) {
+        match mode {
+            ScalingMode::FractionalWithViewport => {
+                self.surface.set_buffer_scale(1);
+                if let Some(viewport) = &self.viewport {
+                    viewport.set_destination(
+                        dimensions.logical_width() as i32,
+                        dimensions.logical_height() as i32,
+                    );
+                }
+            }
+            ScalingMode::FractionalOnly | ScalingMode::Integer => {
+                self.surface.set_buffer_scale(dimensions.buffer_scale());
+            }
+        }
+
+        self.layer_surface
+            .set_size(dimensions.logical_width(), dimensions.logical_height());
+        self.layer_surface.set_exclusive_zone(self.exclusive_zone);
+        self.surface.commit();
+    }
+
+    pub fn update_size(&mut self, width: u32, height: u32, scale_factor: f32) {
+        if width == 0 || height == 0 {
+            info!("Skipping update_size with zero dimension: {width}x{height}");
+            return;
+        }
+
+        let dimensions = match SurfaceDimensions::calculate(width, height, scale_factor) {
+            Ok(d) => d,
+            Err(e) => {
+                error!("Failed to calculate surface dimensions: {e}");
+                return;
+            }
+        };
+        let scaling_mode = self.determine_scaling_mode();
+
+        info!(
+            "Updating window size: logical {}x{}, physical {}x{}, scale {}, buffer_scale {}, mode {:?}",
+            dimensions.logical_width(),
+            dimensions.logical_height(),
+            dimensions.physical_width(),
+            dimensions.physical_height(),
+            scale_factor,
+            dimensions.buffer_scale(),
+            scaling_mode
+        );
+
+        self.configure_slint_window(&dimensions, scaling_mode, scale_factor);
+        self.configure_wayland_surface(&dimensions, scaling_mode);
+
+        info!("Window physical size: {:?}", self.window.size());
+
+        self.size = dimensions.to_slint_physical_size();
+        self.logical_size = dimensions.to_slint_logical_size();
+        self.window.request_redraw();
+    }
+
+    pub const fn logical_size(&self) -> PhysicalSize {
+        self.logical_size
+    }
+
+    pub const fn fractional_scale(&self) -> &Option<ManagedWpFractionalScaleV1> {
+        &self.fractional_scale
+    }
+}