monitor: refactor MonitorHandle to store dyn object

This also alters `VideoMode` to be a regular object and not reference
the `MonitorHandle`, since it's a static data.

Given that `VideoMode` set may change during runtime keeping the
reference as a some sort of validity may not be idea and propagating
errors when changing video mode could be more reliable.

src/platform_impl/apple/uikit/event_loop.rs

@@ -28,7 +28,7 @@ use crate::event_loop::{
     ActiveEventLoop as RootActiveEventLoop, ControlFlow, DeviceEvents,
     EventLoopProxy as CoreEventLoopProxy, OwnedDisplayHandle as CoreOwnedDisplayHandle,
 };
-use crate::monitor::MonitorHandle as RootMonitorHandle;
+use crate::monitor::MonitorHandle as CoreMonitorHandle;
 use crate::platform_impl::Window;
 use crate::window::{CustomCursor, CustomCursorSource, Theme, Window as CoreWindow};
 
@@ -56,14 +56,18 @@ impl RootActiveEventLoop for ActiveEventLoop {
         Err(NotSupportedError::new("create_custom_cursor is not supported").into())
     }
 
-    fn available_monitors(&self) -> Box<dyn Iterator<Item = RootMonitorHandle>> {
-        Box::new(monitor::uiscreens(self.mtm).into_iter().map(|inner| RootMonitorHandle { inner }))
+    fn available_monitors(&self) -> Box<dyn Iterator<Item = CoreMonitorHandle>> {
+        Box::new(
+            monitor::uiscreens(self.mtm)
+                .into_iter()
+                .map(|monitor| CoreMonitorHandle(Arc::new(monitor))),
+        )
     }
 
     fn primary_monitor(&self) -> Option<crate::monitor::MonitorHandle> {
         #[allow(deprecated)]
         let monitor = MonitorHandle::new(UIScreen::mainScreen(self.mtm));
-        Some(RootMonitorHandle { inner: monitor })
+        Some(CoreMonitorHandle(Arc::new(monitor)))
     }
 
     fn listen_device_events(&self, _allowed: DeviceEvents) {}

src/platform_impl/apple/uikit/mod.rs

@@ -18,7 +18,6 @@ pub(crate) use crate::cursor::{
     NoCustomCursor as PlatformCustomCursor, NoCustomCursor as PlatformCustomCursorSource,
 };
 pub(crate) use crate::icon::NoIcon as PlatformIcon;
-pub(crate) use crate::platform_impl::Fullscreen;
 
 #[derive(Debug)]
 pub enum OsError {}

src/platform_impl/apple/uikit/monitor.rs

@@ -11,7 +11,7 @@ use objc2_foundation::NSInteger;
 use objc2_ui_kit::{UIScreen, UIScreenMode};
 
 use crate::dpi::PhysicalPosition;
-use crate::monitor::VideoMode;
+use crate::monitor::{MonitorHandleProvider, VideoMode};
 
 // Workaround for `MainThreadBound` implementing almost no traits
 #[derive(Debug)]
@@ -76,6 +76,60 @@ pub struct MonitorHandle {
     ui_screen: MainThreadBound<Retained<UIScreen>>,
 }
 
+impl MonitorHandleProvider for MonitorHandle {
+    fn id(&self) -> u128 {
+        self.native_id() as _
+    }
+
+    fn native_id(&self) -> u64 {
+        // SAFETY: Only getting the pointer.
+        let mtm = unsafe { MainThreadMarker::new_unchecked() };
+        Retained::as_ptr(self.ui_screen.get(mtm)) as u64
+    }
+
+    fn name(&self) -> Option<std::borrow::Cow<'_, str>> {
+        run_on_main(|mtm| {
+            #[allow(deprecated)]
+            let main = UIScreen::mainScreen(mtm);
+            if *self.ui_screen(mtm) == main {
+                Some("Primary".into())
+            } else if Some(self.ui_screen(mtm)) == main.mirroredScreen().as_ref() {
+                Some("Mirrored".into())
+            } else {
+                #[allow(deprecated)]
+                UIScreen::screens(mtm)
+                    .iter()
+                    .position(|rhs| rhs == *self.ui_screen(mtm))
+                    .map(|idx| idx.to_string().into())
+            }
+        })
+    }
+
+    fn position(&self) -> Option<PhysicalPosition<i32>> {
+        let bounds = self.ui_screen.get_on_main(|ui_screen| ui_screen.nativeBounds());
+        Some((bounds.origin.x as f64, bounds.origin.y as f64).into())
+    }
+
+    fn scale_factor(&self) -> f64 {
+        self.ui_screen.get_on_main(|ui_screen| ui_screen.nativeScale()) as f64
+    }
+
+    fn current_video_mode(&self) -> Option<VideoMode> {
+        Some(run_on_main(|mtm| {
+            VideoModeHandle::new(
+                self.ui_screen(mtm).clone(),
+                self.ui_screen(mtm).currentMode().unwrap(),
+                mtm,
+            )
+            .mode
+        }))
+    }
+
+    fn video_modes(&self) -> Box<dyn Iterator<Item = VideoMode>> {
+        Box::new(self.video_modes())
+    }
+}
+
 impl Clone for MonitorHandle {
     fn clone(&self) -> Self {
         run_on_main(|mtm| Self {
@@ -137,44 +191,6 @@ impl MonitorHandle {
         Self { ui_screen: MainThreadBound::new(ui_screen, mtm) }
     }
 
-    pub fn name(&self) -> Option<String> {
-        run_on_main(|mtm| {
-            #[allow(deprecated)]
-            let main = UIScreen::mainScreen(mtm);
-            if *self.ui_screen(mtm) == main {
-                Some("Primary".to_string())
-            } else if Some(self.ui_screen(mtm)) == main.mirroredScreen().as_ref() {
-                Some("Mirrored".to_string())
-            } else {
-                #[allow(deprecated)]
-                UIScreen::screens(mtm)
-                    .iter()
-                    .position(|rhs| rhs == *self.ui_screen(mtm))
-                    .map(|idx| idx.to_string())
-            }
-        })
-    }
-
-    pub fn position(&self) -> Option<PhysicalPosition<i32>> {
-        let bounds = self.ui_screen.get_on_main(|ui_screen| ui_screen.nativeBounds());
-        Some((bounds.origin.x as f64, bounds.origin.y as f64).into())
-    }
-
-    pub fn scale_factor(&self) -> f64 {
-        self.ui_screen.get_on_main(|ui_screen| ui_screen.nativeScale()) as f64
-    }
-
-    pub fn current_video_mode(&self) -> Option<VideoMode> {
-        Some(run_on_main(|mtm| {
-            VideoModeHandle::new(
-                self.ui_screen(mtm).clone(),
-                self.ui_screen(mtm).currentMode().unwrap(),
-                mtm,
-            )
-            .mode
-        }))
-    }
-
     pub fn video_modes_handles(&self) -> impl Iterator<Item = VideoModeHandle> {
         run_on_main(|mtm| {
             let ui_screen = self.ui_screen(mtm);

src/platform_impl/apple/uikit/window.rs

@@ -1,6 +1,7 @@
 #![allow(clippy::unnecessary_cast)]
 
 use std::collections::VecDeque;
+use std::sync::Arc;
 
 use dispatch2::MainThreadBound;
 use objc2::rc::Retained;
@@ -16,7 +17,7 @@ use tracing::{debug, warn};
 use super::app_state::EventWrapper;
 use super::view::WinitView;
 use super::view_controller::WinitViewController;
-use super::{app_state, monitor, ActiveEventLoop, Fullscreen, MonitorHandle};
+use super::{app_state, monitor, ActiveEventLoop, MonitorHandle};
 use crate::cursor::Cursor;
 use crate::dpi::{
     LogicalInsets, LogicalPosition, LogicalSize, PhysicalInsets, PhysicalPosition, PhysicalSize,
@@ -25,7 +26,7 @@ use crate::dpi::{
 use crate::error::{NotSupportedError, RequestError};
 use crate::event::WindowEvent;
 use crate::icon::Icon;
-use crate::monitor::MonitorHandle as CoreMonitorHandle;
+use crate::monitor::{Fullscreen, MonitorHandle as CoreMonitorHandle};
 use crate::platform::ios::{ScreenEdge, StatusBarStyle, ValidOrientations};
 use crate::window::{
     CursorGrabMode, ImePurpose, ResizeDirection, Theme, UserAttentionType, Window as CoreWindow,
@@ -78,8 +79,9 @@ impl WinitUIWindow {
 
         this.setRootViewController(Some(view_controller));
 
-        match window_attributes.fullscreen.clone().map(Into::into) {
-            Some(Fullscreen::Exclusive(ref monitor, ref video_mode)) => {
+        match window_attributes.fullscreen.clone() {
+            Some(Fullscreen::Exclusive(monitor, ref video_mode)) => {
+                let monitor = monitor.as_any().downcast_ref::<MonitorHandle>().unwrap();
                 let screen = monitor.ui_screen(mtm);
                 if let Some(video_mode) =
                     monitor.video_modes_handles().find(|mode| &mode.mode == video_mode)
@@ -89,6 +91,7 @@ impl WinitUIWindow {
                 this.setScreen(screen);
             },
             Some(Fullscreen::Borderless(Some(ref monitor))) => {
+                let monitor = monitor.as_any().downcast_ref::<MonitorHandle>().unwrap();
                 let screen = monitor.ui_screen(mtm);
                 this.setScreen(screen);
             },
@@ -303,6 +306,7 @@ impl Inner {
         let mtm = MainThreadMarker::new().unwrap();
         let uiscreen = match &monitor {
             Some(Fullscreen::Exclusive(monitor, video_mode)) => {
+                let monitor = monitor.as_any().downcast_ref::<MonitorHandle>().unwrap();
                 let uiscreen = monitor.ui_screen(mtm);
                 if let Some(video_mode) =
                     monitor.video_modes_handles().find(|mode| &mode.mode == video_mode)
@@ -311,7 +315,9 @@ impl Inner {
                 }
                 uiscreen.clone()
             },
-            Some(Fullscreen::Borderless(Some(monitor))) => monitor.ui_screen(mtm).clone(),
+            Some(Fullscreen::Borderless(Some(monitor))) => {
+                monitor.as_any().downcast_ref::<MonitorHandle>().unwrap().ui_screen(mtm).clone()
+            },
             Some(Fullscreen::Borderless(None)) => {
                 self.current_monitor_inner().ui_screen(mtm).clone()
             },
@@ -349,7 +355,7 @@ impl Inner {
             && screen_space_bounds.size.width == screen_bounds.size.width
             && screen_space_bounds.size.height == screen_bounds.size.height
         {
-            Some(Fullscreen::Borderless(Some(monitor)))
+            Some(Fullscreen::Borderless(Some(CoreMonitorHandle(Arc::new(monitor)))))
         } else {
             None
         }
@@ -482,10 +488,13 @@ impl Window {
 
         #[allow(deprecated)]
         let main_screen = UIScreen::mainScreen(mtm);
-        let fullscreen = window_attributes.fullscreen.clone().map(Into::into);
+        let fullscreen = window_attributes.fullscreen.clone();
         let screen = match fullscreen {
-            Some(Fullscreen::Exclusive(ref monitor, _)) => monitor.ui_screen(mtm),
-            Some(Fullscreen::Borderless(Some(ref monitor))) => monitor.ui_screen(mtm),
+            Some(Fullscreen::Exclusive(ref monitor, _))
+            | Some(Fullscreen::Borderless(Some(ref monitor))) => {
+                let monitor = monitor.as_any().downcast_ref::<MonitorHandle>().unwrap();
+                monitor.ui_screen(mtm)
+            },
             Some(Fullscreen::Borderless(None)) | None => &main_screen,
         };
 
@@ -670,12 +679,12 @@ impl CoreWindow for Window {
         self.maybe_wait_on_main(|delegate| delegate.is_maximized())
     }
 
-    fn set_fullscreen(&self, fullscreen: Option<crate::window::Fullscreen>) {
-        self.maybe_wait_on_main(|delegate| delegate.set_fullscreen(fullscreen.map(Into::into)))
+    fn set_fullscreen(&self, fullscreen: Option<Fullscreen>) {
+        self.maybe_wait_on_main(|delegate| delegate.set_fullscreen(fullscreen))
     }
 
-    fn fullscreen(&self) -> Option<crate::window::Fullscreen> {
-        self.maybe_wait_on_main(|delegate| delegate.fullscreen().map(Into::into))
+    fn fullscreen(&self) -> Option<Fullscreen> {
+        self.maybe_wait_on_main(|delegate| delegate.fullscreen())
     }
 
     fn set_decorations(&self, decorations: bool) {
@@ -771,21 +780,24 @@ impl CoreWindow for Window {
 
     fn current_monitor(&self) -> Option<CoreMonitorHandle> {
         self.maybe_wait_on_main(|delegate| {
-            delegate.current_monitor().map(|inner| CoreMonitorHandle { inner })
+            delegate.current_monitor().map(|monitor| CoreMonitorHandle(Arc::new(monitor)))
         })
     }
 
     fn available_monitors(&self) -> Box<dyn Iterator<Item = CoreMonitorHandle>> {
         self.maybe_wait_on_main(|delegate| {
             Box::new(
-                delegate.available_monitors().into_iter().map(|inner| CoreMonitorHandle { inner }),
+                delegate
+                    .available_monitors()
+                    .into_iter()
+                    .map(|monitor| CoreMonitorHandle(Arc::new(monitor))),
             )
         })
     }
 
     fn primary_monitor(&self) -> Option<CoreMonitorHandle> {
         self.maybe_wait_on_main(|delegate| {
-            delegate.primary_monitor().map(|inner| CoreMonitorHandle { inner })
+            delegate.primary_monitor().map(|monitor| CoreMonitorHandle(Arc::new(monitor)))
         })
     }