Winit version 0.29.7

Closes #3327

Signed-off-by: John Nunley <dev@notgull.net>

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        toolchain: [stable, nightly, '1.70.0']
+        toolchain: [stable, nightly, '1.65.0']
         platform:
           # Note: Make sure that we test all the `docs.rs` targets defined in Cargo.toml!
           - { name: 'Windows 64bit MSVC', target: x86_64-pc-windows-msvc,   os: windows-latest,  }
@@ -43,10 +43,10 @@ jobs:
           - { name: 'web',                target: wasm32-unknown-unknown,   os: ubuntu-latest,   }
         exclude:
           # Android is tested on stable-3
-          - toolchain: '1.70.0'
+          - toolchain: '1.65.0'
             platform: { name: 'Android', target: aarch64-linux-android, os: ubuntu-latest, options: '--package=winit --features=android-native-activity', cmd: 'apk --' }
         include:
-          - toolchain: '1.70.0'
+          - toolchain: '1.69.0'
             platform: { name: 'Android', target: aarch64-linux-android, os: ubuntu-latest, options: '--package=winit --features=android-native-activity', cmd: 'apk --' }
 
     env:
@@ -120,7 +120,7 @@ jobs:
     - name: Build tests
       if: >
         !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.70.0'
+        matrix.toolchain != '1.65.0'
       run: cargo $CMD test --no-run $OPTIONS
 
     - name: Run tests
@@ -129,7 +129,7 @@ jobs:
         !contains(matrix.platform.target, 'ios') &&
         !contains(matrix.platform.target, 'wasm32') &&
         !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.70.0'
+        matrix.toolchain != '1.65.0'
       run: cargo $CMD test $OPTIONS
 
     - name: Lint with clippy
@@ -139,7 +139,7 @@ jobs:
     - name: Build tests with serde enabled
       if: >
         !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.70.0'
+        matrix.toolchain != '1.65.0'
       run: cargo $CMD test --no-run $OPTIONS --features serde
 
     - name: Run tests with serde enabled
@@ -148,7 +148,7 @@ jobs:
         !contains(matrix.platform.target, 'ios') &&
         !contains(matrix.platform.target, 'wasm32') &&
         !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.70.0'
+        matrix.toolchain != '1.65.0'
       run: cargo $CMD test $OPTIONS --features serde
 
     # See restore step above

CHANGELOG.md

@@ -11,18 +11,16 @@ Unreleased` header.
 
 # Unreleased
 
-- On Windows, macOS, X11, Wayland and Web, implement setting images as cursors. See the `custom_cursors.rs` example.
-  - Add `Window::set_custom_cursor`
-  - Add `CustomCursor`
-  - Add `CustomCursor::from_rgba` to allow creating cursor images from RGBA data.
-  - Add `CustomCursorExtWebSys::from_url` to allow loading cursor images from URLs.
-- On macOS, add services menu.
-- **Breaking:** On Web, remove queuing fullscreen request in absence of transient activation.
-- On Web, fix setting cursor icon overriding cursor visibility.
+# 0.29.7
+
+- On X11, fix `Xft.dpi` reload during runtime.
+- On X11, fix window minimize.
+
+# 0.29.6
+
 - On Web, fix context menu not being disabled by `with_prevent_default(true)`.
-- **Breaking:** On Web, return `RawWindowHandle::WebCanvas` instead of `RawWindowHandle::Web`.
-- **Breaking:** On Web, macOS and iOS, return `HandleError::Unavailable` when a window handle is not available.
-- **Breaking:** Bump MSRV from `1.65` to `1.70`.
+- On Wayland, fix `WindowEvent::Destroyed` not being delivered after destroying window.
+- Fix `EventLoopExtRunOnDemand::run_on_demand` not working for consequent invocation
 
 # 0.29.5
 

CONTRIBUTING.md

@@ -20,7 +20,7 @@ your description of the issue as detailed as possible:
 
 When making a code contribution to winit, before opening your pull request, please make sure that:
 
-- your patch builds with Winit's minimal supported rust version - Rust 1.70.
+- your patch builds with Winit's minimal supported rust version - Rust 1.65.
 - you tested your modifications on all the platforms impacted, or if not possible, detail which platforms
   were not tested, and what should be tested, so that a maintainer or another contributor can test them
 - you updated any relevant documentation in winit

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "winit"
-version = "0.29.5"
+version = "0.29.7"
 authors = ["The winit contributors", "Pierre Krieger <pierre.krieger1708@gmail.com>"]
 description = "Cross-platform window creation library."
 edition = "2021"
@@ -10,7 +10,7 @@ readme = "README.md"
 repository = "https://github.com/rust-windowing/winit"
 documentation = "https://docs.rs/winit"
 categories = ["gui"]
-rust-version = "1.70.0"
+rust-version = "1.65.0"
 
 [package.metadata.docs.rs]
 features = [
@@ -66,7 +66,7 @@ log = "0.4"
 mint = { version = "0.5.6", optional = true }
 once_cell = "1.12"
 rwh_04 = { package = "raw-window-handle", version = "0.4", optional = true }
-rwh_05 = { package = "raw-window-handle", version = "0.5", features = ["std"], optional = true }
+rwh_05 = { package = "raw-window-handle", version = "0.5.2", features = ["std"], optional = true }
 rwh_06 = { package = "raw-window-handle", version = "0.6", features = ["std"], optional = true }
 serde = { version = "1", optional = true, features = ["serde_derive"] }
 smol_str = "0.2.0"
@@ -86,13 +86,13 @@ ndk-sys = "0.5.0"
 
 [target.'cfg(any(target_os = "ios", target_os = "macos"))'.dependencies]
 core-foundation = "0.9.3"
-objc2 = "0.5.0"
+objc2 = "0.4.1"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 core-graphics = "0.23.1"
 
 [target.'cfg(target_os = "macos")'.dependencies.icrate]
-version = "0.1.0"
+version = "0.0.4"
 features = [
     "dispatch",
     "Foundation",
@@ -105,31 +105,10 @@ features = [
     "Foundation_NSProcessInfo",
     "Foundation_NSThread",
     "Foundation_NSNumber",
-    "AppKit",
-    "AppKit_NSAppearance",
-    "AppKit_NSApplication",
-    "AppKit_NSBitmapImageRep",
-    "AppKit_NSButton",
-    "AppKit_NSColor",
-    "AppKit_NSControl",
-    "AppKit_NSCursor",
-    "AppKit_NSEvent",
-    "AppKit_NSGraphicsContext",
-    "AppKit_NSImage",
-    "AppKit_NSImageRep",
-    "AppKit_NSMenu",
-    "AppKit_NSMenuItem",
-    "AppKit_NSPasteboard",
-    "AppKit_NSResponder",
-    "AppKit_NSScreen",
-    "AppKit_NSTextInputContext",
-    "AppKit_NSView",
-    "AppKit_NSWindow",
-    "AppKit_NSWindowTabGroup",
 ]
 
 [target.'cfg(target_os = "ios")'.dependencies.icrate]
-version = "0.1.0"
+version = "0.0.4"
 features = [
     "dispatch",
     "Foundation",
@@ -200,7 +179,6 @@ version = "0.3.64"
 features = [
     'AbortController',
     'AbortSignal',
-    'Blob',
     'console',
     'CssStyleDeclaration',
     'Document',
@@ -212,11 +190,6 @@ features = [
     'FocusEvent',
     'HtmlCanvasElement',
     'HtmlElement',
-    'HtmlImageElement',
-    'ImageBitmap',
-    'ImageBitmapOptions',
-    'ImageBitmapRenderingContext',
-    'ImageData',
     'IntersectionObserver',
     'IntersectionObserverEntry',
     'KeyboardEvent',
@@ -226,7 +199,6 @@ features = [
     'Node',
     'PageTransitionEvent',
     'PointerEvent',
-    'PremultiplyAlpha',
     'ResizeObserver',
     'ResizeObserverBoxOptions',
     'ResizeObserverEntry',
@@ -234,8 +206,7 @@ features = [
     'ResizeObserverSize',
     'VisibilityState',
     'Window',
-    'WheelEvent',
-    'Url',
+    'WheelEvent'
 ]
 
 [target.'cfg(target_family = "wasm")'.dependencies]

FEATURES.md

@@ -106,7 +106,6 @@ If your PR makes notable changes to Winit's features, please update this section
 - **Cursor locking**: Locking the cursor inside the window so it cannot move.
 - **Cursor confining**: Confining the cursor to the window bounds so it cannot leave them.
 - **Cursor icon**: Changing the cursor icon or hiding the cursor.
-- **Cursor image**: Changing the cursor to your own image.
 - **Cursor hittest**: Handle or ignore mouse events for a window.
 - **Touch events**: Single-touch events.
 - **Touch pressure**: Touch events contain information about the amount of force being applied.
@@ -207,7 +206,6 @@ Legend:
 |Cursor locking          |❌       |✔️      |❌       |✔️          |**N/A**|**N/A**|✔️        |❌      |
 |Cursor confining        |✔️       |❌      |✔️       |✔️          |**N/A**|**N/A**|❌       |❌      |
 |Cursor icon             |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|✔️        |**N/A** |
-|Cursor image            |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|✔️        |**N/A** |
 |Cursor hittest          |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|❌        |❌      |
 |Touch events            |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |✔️        |**N/A** |
 |Touch pressure          |✔️       |❌      |❌       |❌          |❌    |✔️     |✔️        |**N/A** |

README.md

@@ -6,7 +6,7 @@
 
 ```toml
 [dependencies]
-winit = "0.29.5"
+winit = "0.29.7"
 ```
 
 ## [Documentation](https://docs.rs/winit)
@@ -42,7 +42,7 @@ Winit provides the following features, which can be enabled in your `Cargo.toml`
 
 ## MSRV Policy
 
-This crate's Minimum Supported Rust Version (MSRV) is **1.70**. Changes to
+This crate's Minimum Supported Rust Version (MSRV) is **1.65**. Changes to
 the MSRV will be accompanied by a minor version bump.
 
 As a **tentative** policy, the upper bound of the MSRV is given by the following
@@ -156,7 +156,7 @@ For more details, refer to these `android-activity` [example applications](https
 
 If your application is currently based on `NativeActivity` via the `ndk-glue` crate and building with `cargo apk`, then the minimal changes would be:
 1. Remove `ndk-glue` from your `Cargo.toml`
-2. Enable the `"android-native-activity"` feature for Winit: `winit = { version = "0.29.5", features = [ "android-native-activity" ] }`
+2. Enable the `"android-native-activity"` feature for Winit: `winit = { version = "0.29.7", features = [ "android-native-activity" ] }`
 3. Add an `android_main` entrypoint (as above), instead of using the '`[ndk_glue::main]` proc macro from `ndk-macros` (optionally add a dependency on `android_logger` and initialize logging as above).
 4. Pass a clone of the `AndroidApp` that your application receives to Winit when building your event loop (as shown above).
 

clippy.toml

@@ -6,7 +6,6 @@ disallowed-methods = [
     { path = "web_sys::HtmlCanvasElement::set_height", reason = "Winit shouldn't touch the internal canvas size" },
     { path = "web_sys::Window::document", reason = "cache this to reduce calls to JS" },
     { path = "web_sys::Window::get_computed_style", reason = "cache this to reduce calls to JS" },
-    { path = "web_sys::HtmlElement::style", reason = "cache this to reduce calls to JS" },
     { path = "web_sys::Element::request_fullscreen", reason = "Doesn't account for compatibility with Safari" },
     { path = "web_sys::Document::exit_fullscreen", reason = "Doesn't account for compatibility with Safari" },
     { path = "web_sys::Document::fullscreen_element", reason = "Doesn't account for compatibility with Safari" },

examples/child_window.rs

@@ -17,7 +17,7 @@ fn main() -> Result<(), impl std::error::Error> {
         dpi::{LogicalPosition, LogicalSize, Position},
         event::{ElementState, Event, KeyEvent, WindowEvent},
         event_loop::{EventLoop, EventLoopWindowTarget},
-        raw_window_handle::HasWindowHandle,
+        raw_window_handle::HasRawWindowHandle,
         window::{Window, WindowBuilder, WindowId},
     };
 
@@ -26,13 +26,14 @@ fn main() -> Result<(), impl std::error::Error> {
         event_loop: &EventLoopWindowTarget<()>,
         windows: &mut HashMap<WindowId, Window>,
     ) {
-        let parent = parent.window_handle().unwrap();
+        let parent = parent.raw_window_handle().unwrap();
         let mut builder = WindowBuilder::new()
             .with_title("child window")
             .with_inner_size(LogicalSize::new(200.0f32, 200.0f32))
             .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
             .with_visible(true);
-        builder = builder.with_parent_window(Some(parent));
+        // `with_parent_window` is unsafe. Parent window must be a valid window.
+        builder = unsafe { builder.with_parent_window(Some(parent)) };
         let child_window = builder.build(event_loop).unwrap();
 
         let id = child_window.id();

examples/custom_cursors.rs

@@ -1,94 +0,0 @@
-#![allow(clippy::single_match, clippy::disallowed_methods)]
-
-#[cfg(not(wasm_platform))]
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::{EventLoop, EventLoopWindowTarget},
-    keyboard::Key,
-    window::{CustomCursor, WindowBuilder},
-};
-
-fn decode_cursor<T>(bytes: &[u8], window_target: &EventLoopWindowTarget<T>) -> CustomCursor {
-    let img = image::load_from_memory(bytes).unwrap().to_rgba8();
-    let samples = img.into_flat_samples();
-    let (_, w, h) = samples.extents();
-    let (w, h) = (w as u16, h as u16);
-    let builder = CustomCursor::from_rgba(samples.samples, w, h, w / 2, h / 2).unwrap();
-
-    builder.build(window_target)
-}
-
-#[cfg(not(wasm_platform))]
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    #[cfg(not(wasm_platform))]
-    SimpleLogger::new()
-        .with_level(log::LevelFilter::Info)
-        .init()
-        .unwrap();
-    #[cfg(wasm_platform)]
-    console_log::init_with_level(log::Level::Debug).unwrap();
-
-    let event_loop = EventLoop::new().unwrap();
-    let builder = WindowBuilder::new().with_title("A fantastic window!");
-    #[cfg(wasm_platform)]
-    let builder = {
-        use winit::platform::web::WindowBuilderExtWebSys;
-        builder.with_append(true)
-    };
-    let window = builder.build(&event_loop).unwrap();
-
-    let mut cursor_idx = 0;
-    let mut cursor_visible = true;
-
-    let custom_cursors = [
-        decode_cursor(include_bytes!("data/cross.png"), &event_loop),
-        decode_cursor(include_bytes!("data/cross2.png"), &event_loop),
-    ];
-
-    event_loop.run(move |event, _elwt| match event {
-        Event::WindowEvent { event, .. } => match event {
-            WindowEvent::KeyboardInput {
-                event:
-                    KeyEvent {
-                        state: ElementState::Pressed,
-                        logical_key: key,
-                        ..
-                    },
-                ..
-            } => match key.as_ref() {
-                Key::Character("1") => {
-                    log::debug!("Setting cursor to {:?}", cursor_idx);
-                    window.set_custom_cursor(&custom_cursors[cursor_idx]);
-                    cursor_idx = (cursor_idx + 1) % 2;
-                }
-                Key::Character("2") => {
-                    log::debug!("Setting cursor icon to default");
-                    window.set_cursor_icon(Default::default());
-                }
-                Key::Character("3") => {
-                    cursor_visible = !cursor_visible;
-                    log::debug!("Setting cursor visibility to {:?}", cursor_visible);
-                    window.set_cursor_visible(cursor_visible);
-                }
-                _ => {}
-            },
-            WindowEvent::RedrawRequested => {
-                #[cfg(not(wasm_platform))]
-                fill::fill_window(&window);
-            }
-            WindowEvent::CloseRequested => {
-                #[cfg(not(wasm_platform))]
-                _elwt.exit();
-            }
-            _ => (),
-        },
-        Event::AboutToWait => {
-            window.request_redraw();
-        }
-        _ => {}
-    })
-}

examples/util/fill.rs

@@ -7,17 +7,30 @@
 //! The `softbuffer` crate is used, largely because of its ease of use. `glutin` or `wgpu` could
 //! also be used to fill the window buffer, but they are more complicated to use.
 
-use winit::window::Window;
+#[allow(unused_imports)]
+pub use platform::cleanup_window;
+pub use platform::fill_window;
 
 #[cfg(all(feature = "rwh_05", not(any(target_os = "android", target_os = "ios"))))]
-pub(super) fn fill_window(window: &Window) {
-    use softbuffer::{Context, Surface};
+mod platform {
     use std::cell::RefCell;
     use std::collections::HashMap;
     use std::mem::ManuallyDrop;
     use std::num::NonZeroU32;
+
+    use softbuffer::{Context, Surface};
+    use winit::window::Window;
     use winit::window::WindowId;
 
+    thread_local! {
+        // NOTE: You should never do things like that, create context and drop it before
+        // you drop the event loop. We do this for brevity to not blow up examples. We use
+        // ManuallyDrop to prevent destructors from running.
+        //
+        // A static, thread-local map of graphics contexts to open windows.
+        static GC: ManuallyDrop<RefCell<Option<GraphicsContext>>> = ManuallyDrop::new(RefCell::new(None));
+    }
+
     /// The graphics context used to draw to a window.
     struct GraphicsContext {
         /// The global softbuffer context.
@@ -35,55 +48,69 @@ pub(super) fn fill_window(window: &Window) {
             }
         }
 
-        fn surface(&mut self, w: &Window) -> &mut Surface {
-            self.surfaces.entry(w.id()).or_insert_with(|| {
-                unsafe { Surface::new(&self.context, w) }
+        fn create_surface(&mut self, window: &Window) -> &mut Surface {
+            self.surfaces.entry(window.id()).or_insert_with(|| {
+                unsafe { Surface::new(&self.context, window) }
                     .expect("Failed to create a softbuffer surface")
             })
         }
+
+        fn destroy_surface(&mut self, window: &Window) {
+            self.surfaces.remove(&window.id());
+        }
     }
 
-    thread_local! {
-        // NOTE: You should never do things like that, create context and drop it before
-        // you drop the event loop. We do this for brevity to not blow up examples. We use
-        // ManuallyDrop to prevent destructors from running.
-        //
-        // A static, thread-local map of graphics contexts to open windows.
-        static GC: ManuallyDrop<RefCell<Option<GraphicsContext>>> = ManuallyDrop::new(RefCell::new(None));
+    pub fn fill_window(window: &Window) {
+        GC.with(|gc| {
+            let size = window.inner_size();
+            let (Some(width), Some(height)) =
+                (NonZeroU32::new(size.width), NonZeroU32::new(size.height))
+            else {
+                return;
+            };
+
+            // Either get the last context used or create a new one.
+            let mut gc = gc.borrow_mut();
+            let surface = gc
+                .get_or_insert_with(|| GraphicsContext::new(window))
+                .create_surface(window);
+
+            // Fill a buffer with a solid color.
+            const DARK_GRAY: u32 = 0xFF181818;
+
+            surface
+                .resize(width, height)
+                .expect("Failed to resize the softbuffer surface");
+
+            let mut buffer = surface
+                .buffer_mut()
+                .expect("Failed to get the softbuffer buffer");
+            buffer.fill(DARK_GRAY);
+            buffer
+                .present()
+                .expect("Failed to present the softbuffer buffer");
+        })
     }
 
-    GC.with(|gc| {
-        let size = window.inner_size();
-        let (Some(width), Some(height)) =
-            (NonZeroU32::new(size.width), NonZeroU32::new(size.height))
-        else {
-            return;
-        };
-
-        // Either get the last context used or create a new one.
-        let mut gc = gc.borrow_mut();
-        let surface = gc
-            .get_or_insert_with(|| GraphicsContext::new(window))
-            .surface(window);
-
-        // Fill a buffer with a solid color.
-        const DARK_GRAY: u32 = 0xFF181818;
-
-        surface
-            .resize(width, height)
-            .expect("Failed to resize the softbuffer surface");
-
-        let mut buffer = surface
-            .buffer_mut()
-            .expect("Failed to get the softbuffer buffer");
-        buffer.fill(DARK_GRAY);
-        buffer
-            .present()
-            .expect("Failed to present the softbuffer buffer");
-    })
+    #[allow(dead_code)]
+    pub fn cleanup_window(window: &Window) {
+        GC.with(|gc| {
+            let mut gc = gc.borrow_mut();
+            if let Some(context) = gc.as_mut() {
+                context.destroy_surface(window);
+            }
+        });
+    }
 }
 
 #[cfg(not(all(feature = "rwh_05", not(any(target_os = "android", target_os = "ios")))))]
-pub(super) fn fill_window(_window: &Window) {
-    // No-op on mobile platforms.
+mod platform {
+    pub fn fill_window(_window: &winit::window::Window) {
+        // No-op on mobile platforms.
+    }
+
+    #[allow(dead_code)]
+    pub fn cleanup_window(_window: &winit::window::Window) {
+        // No-op on mobile platforms.
+    }
 }

examples/window_on_demand.rs

@@ -40,6 +40,7 @@ fn main() -> Result<(), impl std::error::Error> {
                         window_id,
                     } if window.id() == window_id => {
                         println!("--------------------------------------------------------- Window {idx} CloseRequested");
+                        fill::cleanup_window(window);
                         app.window = None;
                     }
                     Event::AboutToWait => window.request_redraw(),

src/cursor.rs

@@ -1,278 +0,0 @@
-use core::fmt;
-use std::hash::Hasher;
-use std::sync::Arc;
-use std::{error::Error, hash::Hash};
-
-use crate::event_loop::EventLoopWindowTarget;
-use crate::platform_impl::{self, PlatformCustomCursor, PlatformCustomCursorBuilder};
-
-/// The maximum width and height for a cursor when using [`CustomCursor::from_rgba`].
-pub const MAX_CURSOR_SIZE: u16 = 2048;
-
-const PIXEL_SIZE: usize = 4;
-
-/// Use a custom image as a cursor (mouse pointer).
-///
-/// ## Platform-specific
-///
-/// **Web**: Some browsers have limits on cursor sizes usually at 128x128.
-///
-/// # Example
-///
-/// ```no_run
-/// use winit::{
-///     event::{Event, WindowEvent},
-///     event_loop::{ControlFlow, EventLoop},
-///     window::{CustomCursor, Window},
-/// };
-///
-/// let mut event_loop = EventLoop::new().unwrap();
-///
-/// let w = 10;
-/// let h = 10;
-/// let rgba = vec![255; (w * h * 4) as usize];
-///
-/// #[cfg(not(target_family = "wasm"))]
-/// let builder = CustomCursor::from_rgba(rgba, w, h, w / 2, h / 2).unwrap();
-///
-/// #[cfg(target_family = "wasm")]
-/// let builder = {
-///     use winit::platform::web::CustomCursorExtWebSys;
-///     CustomCursor::from_url(String::from("http://localhost:3000/cursor.png"), 0, 0)
-/// };
-///
-/// let custom_cursor = builder.build(&event_loop);
-///
-/// let window = Window::new(&event_loop).unwrap();
-/// window.set_custom_cursor(&custom_cursor);
-/// ```
-#[derive(Clone, Debug, Eq, Hash, PartialEq)]
-pub struct CustomCursor {
-    /// Platforms should make sure this is cheap to clone.
-    pub(crate) inner: PlatformCustomCursor,
-}
-
-impl CustomCursor {
-    /// Creates a new cursor from an rgba buffer.
-    ///
-    /// ## Platform-specific
-    ///
-    /// - **Web:** Setting cursor could be delayed due to the creation of `Blob` objects,
-    ///   which are async by nature.
-    pub fn from_rgba(
-        rgba: impl Into<Vec<u8>>,
-        width: u16,
-        height: u16,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    ) -> Result<CustomCursorBuilder, BadImage> {
-        Ok(CustomCursorBuilder {
-            inner: PlatformCustomCursorBuilder::from_rgba(
-                rgba.into(),
-                width,
-                height,
-                hotspot_x,
-                hotspot_y,
-            )?,
-        })
-    }
-}
-
-/// Builds a [`CustomCursor`].
-///
-/// See [`CustomCursor`] for more details.
-#[derive(Debug)]
-pub struct CustomCursorBuilder {
-    pub(crate) inner: PlatformCustomCursorBuilder,
-}
-
-impl CustomCursorBuilder {
-    pub fn build<T>(self, window_target: &EventLoopWindowTarget<T>) -> CustomCursor {
-        CustomCursor {
-            inner: PlatformCustomCursor::build(self.inner, &window_target.p),
-        }
-    }
-}
-
-/// An error produced when using [`CustomCursor::from_rgba`] with invalid arguments.
-#[derive(Debug, Clone)]
-pub enum BadImage {
-    /// Produced when the image dimensions are larger than [`MAX_CURSOR_SIZE`]. This doesn't
-    /// guarantee that the cursor will work, but should avoid many platform and device specific
-    /// limits.
-    TooLarge { width: u16, height: u16 },
-    /// Produced when the length of the `rgba` argument isn't divisible by 4, thus `rgba` can't be
-    /// safely interpreted as 32bpp RGBA pixels.
-    ByteCountNotDivisibleBy4 { byte_count: usize },
-    /// Produced when the number of pixels (`rgba.len() / 4`) isn't equal to `width * height`.
-    /// At least one of your arguments is incorrect.
-    DimensionsVsPixelCount {
-        width: u16,
-        height: u16,
-        width_x_height: u64,
-        pixel_count: u64,
-    },
-    /// Produced when the hotspot is outside the image bounds
-    HotspotOutOfBounds {
-        width: u16,
-        height: u16,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    },
-}
-
-impl fmt::Display for BadImage {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            BadImage::TooLarge { width, height } => write!(f,
-                "The specified dimensions ({width:?}x{height:?}) are too large. The maximum is {MAX_CURSOR_SIZE:?}x{MAX_CURSOR_SIZE:?}.",
-            ),
-            BadImage::ByteCountNotDivisibleBy4 { byte_count } => write!(f,
-                "The length of the `rgba` argument ({byte_count:?}) isn't divisible by 4, making it impossible to interpret as 32bpp RGBA pixels.",
-            ),
-            BadImage::DimensionsVsPixelCount {
-                width,
-                height,
-                width_x_height,
-                pixel_count,
-            } => write!(f,
-                "The specified dimensions ({width:?}x{height:?}) don't match the number of pixels supplied by the `rgba` argument ({pixel_count:?}). For those dimensions, the expected pixel count is {width_x_height:?}.",
-            ),
-            BadImage::HotspotOutOfBounds {
-                width,
-                height,
-                hotspot_x,
-                hotspot_y,
-            } => write!(f,
-                "The specified hotspot ({hotspot_x:?}, {hotspot_y:?}) is outside the image bounds ({width:?}x{height:?}).",
-            ),
-        }
-    }
-}
-
-impl Error for BadImage {}
-
-/// Platforms export this directly as `PlatformCustomCursorBuilder` if they need to only work with images.
-#[derive(Debug)]
-pub(crate) struct OnlyCursorImageBuilder(pub(crate) CursorImage);
-
-#[allow(dead_code)]
-impl OnlyCursorImageBuilder {
-    pub(crate) fn from_rgba(
-        rgba: Vec<u8>,
-        width: u16,
-        height: u16,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    ) -> Result<Self, BadImage> {
-        CursorImage::from_rgba(rgba, width, height, hotspot_x, hotspot_y).map(Self)
-    }
-}
-
-/// Platforms export this directly as `PlatformCustomCursor` if they don't implement caching.
-#[derive(Debug, Clone)]
-pub(crate) struct OnlyCursorImage(pub(crate) Arc<CursorImage>);
-
-impl Hash for OnlyCursorImage {
-    fn hash<H: Hasher>(&self, state: &mut H) {
-        Arc::as_ptr(&self.0).hash(state);
-    }
-}
-
-impl PartialEq for OnlyCursorImage {
-    fn eq(&self, other: &Self) -> bool {
-        Arc::ptr_eq(&self.0, &other.0)
-    }
-}
-
-impl Eq for OnlyCursorImage {}
-
-#[allow(dead_code)]
-impl OnlyCursorImage {
-    fn build<T>(
-        builder: OnlyCursorImageBuilder,
-        _: &platform_impl::EventLoopWindowTarget<T>,
-    ) -> Self {
-        Self(Arc::new(builder.0))
-    }
-}
-
-#[derive(Debug)]
-#[allow(dead_code)]
-pub(crate) struct CursorImage {
-    pub(crate) rgba: Vec<u8>,
-    pub(crate) width: u16,
-    pub(crate) height: u16,
-    pub(crate) hotspot_x: u16,
-    pub(crate) hotspot_y: u16,
-}
-
-impl CursorImage {
-    pub(crate) fn from_rgba(
-        rgba: Vec<u8>,
-        width: u16,
-        height: u16,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    ) -> Result<Self, BadImage> {
-        if width > MAX_CURSOR_SIZE || height > MAX_CURSOR_SIZE {
-            return Err(BadImage::TooLarge { width, height });
-        }
-
-        if rgba.len() % PIXEL_SIZE != 0 {
-            return Err(BadImage::ByteCountNotDivisibleBy4 {
-                byte_count: rgba.len(),
-            });
-        }
-
-        let pixel_count = (rgba.len() / PIXEL_SIZE) as u64;
-        let width_x_height = width as u64 * height as u64;
-        if pixel_count != width_x_height {
-            return Err(BadImage::DimensionsVsPixelCount {
-                width,
-                height,
-                width_x_height,
-                pixel_count,
-            });
-        }
-
-        if hotspot_x >= width || hotspot_y >= height {
-            return Err(BadImage::HotspotOutOfBounds {
-                width,
-                height,
-                hotspot_x,
-                hotspot_y,
-            });
-        }
-
-        Ok(CursorImage {
-            rgba,
-            width,
-            height,
-            hotspot_x,
-            hotspot_y,
-        })
-    }
-}
-
-// Platforms that don't support cursors will export this as `PlatformCustomCursor`.
-#[derive(Debug, Clone, Hash, PartialEq, Eq)]
-pub(crate) struct NoCustomCursor;
-
-#[allow(dead_code)]
-impl NoCustomCursor {
-    pub(crate) fn from_rgba(
-        rgba: Vec<u8>,
-        width: u16,
-        height: u16,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    ) -> Result<Self, BadImage> {
-        CursorImage::from_rgba(rgba, width, height, hotspot_x, hotspot_y)?;
-        Ok(Self)
-    }
-
-    fn build<T>(self, _: &platform_impl::EventLoopWindowTarget<T>) -> NoCustomCursor {
-        self
-    }
-}

src/lib.rs

@@ -172,7 +172,6 @@ extern crate bitflags;
 pub mod dpi;
 #[macro_use]
 pub mod error;
-mod cursor;
 pub mod event;
 pub mod event_loop;
 mod icon;

src/platform/macos.rs

@@ -1,6 +1,5 @@
 use std::os::raw::c_void;
 
-use icrate::Foundation::MainThreadMarker;
 use objc2::rc::Id;
 
 use crate::{
@@ -366,9 +365,7 @@ impl MonitorHandleExtMacOS for MonitorHandle {
     }
 
     fn ns_screen(&self) -> Option<*mut c_void> {
-        // SAFETY: We only use the marker to get a pointer
-        let mtm = unsafe { MainThreadMarker::new_unchecked() };
-        self.inner.ns_screen(mtm).map(|s| Id::as_ptr(&s) as _)
+        self.inner.ns_screen().map(|s| Id::as_ptr(&s) as _)
     }
 }
 

src/platform/pump_events.rs

@@ -155,19 +155,19 @@ pub trait EventLoopExtPumpEvents {
     /// - **Windows**: The implementation will use `PeekMessage` when checking for
     ///   window messages to avoid blocking your external event loop.
     ///
-    /// - **MacOS**: The implementation works in terms of stopping the global application
+    /// - **MacOS**: The implementation works in terms of stopping the global `NSApp`
     ///   whenever the application `RunLoop` indicates that it is preparing to block
     ///   and wait for new events.
     ///
     ///   This is very different to the polling APIs that are available on other
     ///   platforms (the lower level polling primitives on MacOS are private
-    ///   implementation details for `NSApplication` which aren't accessible to
-    ///   application developers)
+    ///   implementation details for `NSApp` which aren't accessible to application
+    ///   developers)
     ///
     ///   It's likely this will be less efficient than polling on other OSs and
-    ///   it also means the `NSApplication` is stopped while outside of the Winit
+    ///   it also means the `NSApp` is stopped while outside of the Winit
     ///   event loop - and that's observable (for example to crates like `rfd`)
-    ///   because the `NSApplication` is global state.
+    ///   because the `NSApp` is global state.
     ///
     ///   If you render outside of Winit you are likely to see window resizing artifacts
     ///   since MacOS expects applications to render synchronously during any `drawRect`

src/platform/run_on_demand.rs

@@ -76,6 +76,14 @@ impl<T> EventLoopExtRunOnDemand for EventLoop<T> {
     where
         F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>),
     {
+        self.event_loop.window_target().clear_exit();
         self.event_loop.run_on_demand(event_handler)
     }
 }
+
+impl<T> EventLoopWindowTarget<T> {
+    /// Clear exit status.
+    pub(crate) fn clear_exit(&self) {
+        self.p.clear_exit()
+    }
+}

src/platform/web.rs

@@ -27,12 +27,9 @@
 //! [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
 //! [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
 
-use crate::cursor::CustomCursorBuilder;
 use crate::event::Event;
 use crate::event_loop::EventLoop;
 use crate::event_loop::EventLoopWindowTarget;
-use crate::platform_impl::PlatformCustomCursorBuilder;
-use crate::window::CustomCursor;
 use crate::window::{Window, WindowBuilder};
 use crate::SendSyncWrapper;
 
@@ -203,24 +200,3 @@ pub enum PollStrategy {
     #[default]
     Scheduler,
 }
-
-pub trait CustomCursorExtWebSys {
-    /// Creates a new cursor from a URL pointing to an image.
-    /// It uses the [url css function](https://developer.mozilla.org/en-US/docs/Web/CSS/url),
-    /// but browser support for image formats is inconsistent. Using [PNG] is recommended.
-    ///
-    /// [PNG]: https://en.wikipedia.org/wiki/PNG
-    fn from_url(url: String, hotspot_x: u16, hotspot_y: u16) -> CustomCursorBuilder;
-}
-
-impl CustomCursorExtWebSys for CustomCursor {
-    fn from_url(url: String, hotspot_x: u16, hotspot_y: u16) -> CustomCursorBuilder {
-        CustomCursorBuilder {
-            inner: PlatformCustomCursorBuilder::Url {
-                url,
-                hotspot_x,
-                hotspot_y,
-            },
-        }
-    }
-}

src/platform_impl/android/mod.rs

@@ -713,6 +713,10 @@ impl<T: 'static> EventLoopWindowTarget<T> {
         self.exit.set(true)
     }
 
+    pub(crate) fn clear_exit(&self) {
+        self.exit.set(false)
+    }
+
     pub(crate) fn exiting(&self) -> bool {
         self.exit.get()
     }
@@ -751,18 +755,6 @@ impl DeviceId {
 #[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
 pub struct PlatformSpecificWindowBuilderAttributes;
 
-#[derive(Debug, Clone)]
-pub(crate) struct OwnedWindowHandle {}
-
-impl OwnedWindowHandle {
-    #[cfg(feature = "rwh_06")]
-    pub(crate) fn new_parent_window(_handle: rwh_06::WindowHandle<'_>) -> Self {
-        // Parent windows are currently unsupported, though owned window
-        // handles would be implementable.
-        Self {}
-    }
-}
-
 pub(crate) struct Window {
     app: AndroidApp,
     redraw_requester: RedrawRequester,
@@ -918,8 +910,6 @@ impl Window {
 
     pub fn set_cursor_icon(&self, _: window::CursorIcon) {}
 
-    pub(crate) fn set_custom_cursor(&self, _: PlatformCustomCursor) {}
-
     pub fn set_cursor_position(&self, _: Position) -> Result<(), error::ExternalError> {
         Err(error::ExternalError::NotSupported(
             error::NotSupportedError::new(),
@@ -1045,8 +1035,6 @@ impl Display for OsError {
     }
 }
 
-pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursor;
-pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursorBuilder;
 pub(crate) use crate::icon::NoIcon as PlatformIcon;
 
 #[derive(Clone, Debug, PartialEq, Eq, Hash)]

src/platform_impl/ios/mod.rs

@@ -73,12 +73,10 @@ pub(crate) use self::{
         EventLoop, EventLoopProxy, EventLoopWindowTarget, PlatformSpecificEventLoopAttributes,
     },
     monitor::{MonitorHandle, VideoMode},
-    window::{OwnedWindowHandle, PlatformSpecificWindowBuilderAttributes, Window, WindowId},
+    window::{PlatformSpecificWindowBuilderAttributes, Window, WindowId},
 };
 
 use self::uikit::UIScreen;
-pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursor;
-pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursorBuilder;
 pub(crate) use crate::icon::NoIcon as PlatformIcon;
 pub(crate) use crate::platform_impl::Fullscreen;
 

src/platform_impl/ios/monitor.rs

@@ -8,7 +8,6 @@ use std::{
 use icrate::Foundation::{MainThreadBound, MainThreadMarker, NSInteger};
 use objc2::mutability::IsRetainable;
 use objc2::rc::Id;
-use objc2::Message;
 
 use super::uikit::{UIScreen, UIScreenMode};
 use crate::{
@@ -21,15 +20,16 @@ use crate::{
 #[derive(Debug)]
 struct MainThreadBoundDelegateImpls<T>(MainThreadBound<Id<T>>);
 
-impl<T: IsRetainable + Message> Clone for MainThreadBoundDelegateImpls<T> {
+impl<T: IsRetainable> Clone for MainThreadBoundDelegateImpls<T> {
     fn clone(&self) -> Self {
-        Self(MainThreadMarker::run_on_main(|mtm| {
-            MainThreadBound::new(Id::clone(self.0.get(mtm)), mtm)
-        }))
+        Self(
+            self.0
+                .get_on_main(|inner, mtm| MainThreadBound::new(Id::clone(inner), mtm)),
+        )
     }
 }
 
-impl<T: IsRetainable + Message> hash::Hash for MainThreadBoundDelegateImpls<T> {
+impl<T: IsRetainable> hash::Hash for MainThreadBoundDelegateImpls<T> {
     fn hash<H: hash::Hasher>(&self, state: &mut H) {
         // SAFETY: Marker only used to get the pointer
         let mtm = unsafe { MainThreadMarker::new_unchecked() };
@@ -37,7 +37,7 @@ impl<T: IsRetainable + Message> hash::Hash for MainThreadBoundDelegateImpls<T> {
     }
 }
 
-impl<T: IsRetainable + Message> PartialEq for MainThreadBoundDelegateImpls<T> {
+impl<T: IsRetainable> PartialEq for MainThreadBoundDelegateImpls<T> {
     fn eq(&self, other: &Self) -> bool {
         // SAFETY: Marker only used to get the pointer
         let mtm = unsafe { MainThreadMarker::new_unchecked() };
@@ -45,7 +45,7 @@ impl<T: IsRetainable + Message> PartialEq for MainThreadBoundDelegateImpls<T> {
     }
 }
 
-impl<T: IsRetainable + Message> Eq for MainThreadBoundDelegateImpls<T> {}
+impl<T: IsRetainable> Eq for MainThreadBoundDelegateImpls<T> {}
 
 #[derive(Debug, PartialEq, Eq, Hash, Clone)]
 pub struct VideoMode {
@@ -100,9 +100,11 @@ pub struct MonitorHandle {
 
 impl Clone for MonitorHandle {
     fn clone(&self) -> Self {
-        MainThreadMarker::run_on_main(|mtm| Self {
-            ui_screen: MainThreadBound::new(self.ui_screen.get(mtm).clone(), mtm),
-        })
+        Self {
+            ui_screen: self
+                .ui_screen
+                .get_on_main(|inner, mtm| MainThreadBound::new(inner.clone(), mtm)),
+        }
     }
 }
 
@@ -166,16 +168,16 @@ impl MonitorHandle {
     }
 
     pub fn name(&self) -> Option<String> {
-        MainThreadMarker::run_on_main(|mtm| {
+        self.ui_screen.get_on_main(|ui_screen, mtm| {
             let main = UIScreen::main(mtm);
-            if *self.ui_screen(mtm) == main {
+            if *ui_screen == main {
                 Some("Primary".to_string())
-            } else if *self.ui_screen(mtm) == main.mirroredScreen() {
+            } else if *ui_screen == main.mirroredScreen() {
                 Some("Mirrored".to_string())
             } else {
                 UIScreen::screens(mtm)
                     .iter()
-                    .position(|rhs| rhs == &**self.ui_screen(mtm))
+                    .position(|rhs| rhs == &**ui_screen)
                     .map(|idx| idx.to_string())
             }
         })
@@ -184,32 +186,31 @@ impl MonitorHandle {
     pub fn size(&self) -> PhysicalSize<u32> {
         let bounds = self
             .ui_screen
-            .get_on_main(|ui_screen| ui_screen.nativeBounds());
+            .get_on_main(|ui_screen, _| ui_screen.nativeBounds());
         PhysicalSize::new(bounds.size.width as u32, bounds.size.height as u32)
     }
 
     pub fn position(&self) -> PhysicalPosition<i32> {
         let bounds = self
             .ui_screen
-            .get_on_main(|ui_screen| ui_screen.nativeBounds());
+            .get_on_main(|ui_screen, _| ui_screen.nativeBounds());
         (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
+            .get_on_main(|ui_screen, _| ui_screen.nativeScale()) as f64
     }
 
     pub fn refresh_rate_millihertz(&self) -> Option<u32> {
         Some(
             self.ui_screen
-                .get_on_main(|ui_screen| refresh_rate_millihertz(ui_screen)),
+                .get_on_main(|ui_screen, _| refresh_rate_millihertz(ui_screen)),
         )
     }
 
     pub fn video_modes(&self) -> impl Iterator<Item = VideoMode> {
-        MainThreadMarker::run_on_main(|mtm| {
-            let ui_screen = self.ui_screen(mtm);
+        self.ui_screen.get_on_main(|ui_screen, mtm| {
             // Use Ord impl of RootVideoMode
 
             let modes: BTreeSet<_> = ui_screen
@@ -229,12 +230,8 @@ impl MonitorHandle {
     }
 
     pub fn preferred_video_mode(&self) -> VideoMode {
-        MainThreadMarker::run_on_main(|mtm| {
-            VideoMode::new(
-                self.ui_screen(mtm).clone(),
-                self.ui_screen(mtm).preferredMode().unwrap(),
-                mtm,
-            )
+        self.ui_screen.get_on_main(|ui_screen, mtm| {
+            VideoMode::new(ui_screen.clone(), ui_screen.preferredMode().unwrap(), mtm)
         })
     }
 }

src/platform_impl/ios/view.rs

@@ -1,12 +1,12 @@
 #![allow(clippy::unnecessary_cast)]
 use std::cell::Cell;
+use std::ptr::NonNull;
 
 use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSObjectProtocol, NSSet};
+use objc2::declare::{Ivar, IvarDrop};
 use objc2::rc::Id;
 use objc2::runtime::AnyClass;
-use objc2::{
-    declare_class, extern_methods, msg_send, msg_send_id, mutability, ClassType, DeclaredClass,
-};
+use objc2::{declare_class, extern_methods, msg_send, msg_send_id, mutability, ClassType};
 
 use super::app_state::{self, EventWrapper};
 use super::uikit::{
@@ -37,8 +37,6 @@ declare_class!(
         const NAME: &'static str = "WinitUIView";
     }
 
-    impl DeclaredClass for WinitView {}
-
     unsafe impl WinitView {
         #[method(drawRect:)]
         fn draw_rect(&self, rect: CGRect) {
@@ -276,7 +274,11 @@ pub struct ViewControllerState {
 }
 
 declare_class!(
-    pub(crate) struct WinitViewController;
+    pub(crate) struct WinitViewController {
+        state: IvarDrop<Box<ViewControllerState>, "_state">,
+    }
+
+    mod view_controller_ivars;
 
     unsafe impl ClassType for WinitViewController {
         #[inherits(UIResponder, NSObject)]
@@ -285,8 +287,28 @@ declare_class!(
         const NAME: &'static str = "WinitUIViewController";
     }
 
-    impl DeclaredClass for WinitViewController {
-        type Ivars = ViewControllerState;
+    unsafe impl WinitViewController {
+        #[method(init)]
+        unsafe fn init(this: *mut Self) -> Option<NonNull<Self>> {
+            let this: Option<&mut Self> = msg_send![super(this), init];
+            this.map(|this| {
+                // These are set in WinitViewController::new, it's just to set them
+                // to _something_.
+                Ivar::write(
+                    &mut this.state,
+                    Box::new(ViewControllerState {
+                        prefers_status_bar_hidden: Cell::new(false),
+                        preferred_status_bar_style: Cell::new(UIStatusBarStyle::Default),
+                        prefers_home_indicator_auto_hidden: Cell::new(false),
+                        supported_orientations: Cell::new(UIInterfaceOrientationMask::All),
+                        preferred_screen_edges_deferring_system_gestures: Cell::new(
+                            UIRectEdge::NONE,
+                        ),
+                    }),
+                );
+                NonNull::from(this)
+            })
+        }
     }
 
     unsafe impl WinitViewController {
@@ -297,27 +319,27 @@ declare_class!(
 
         #[method(prefersStatusBarHidden)]
         fn prefers_status_bar_hidden(&self) -> bool {
-            self.ivars().prefers_status_bar_hidden.get()
+            self.state.prefers_status_bar_hidden.get()
         }
 
         #[method(preferredStatusBarStyle)]
         fn preferred_status_bar_style(&self) -> UIStatusBarStyle {
-            self.ivars().preferred_status_bar_style.get()
+            self.state.preferred_status_bar_style.get()
         }
 
         #[method(prefersHomeIndicatorAutoHidden)]
         fn prefers_home_indicator_auto_hidden(&self) -> bool {
-            self.ivars().prefers_home_indicator_auto_hidden.get()
+            self.state.prefers_home_indicator_auto_hidden.get()
         }
 
         #[method(supportedInterfaceOrientations)]
         fn supported_orientations(&self) -> UIInterfaceOrientationMask {
-            self.ivars().supported_orientations.get()
+            self.state.supported_orientations.get()
         }
 
         #[method(preferredScreenEdgesDeferringSystemGestures)]
         fn preferred_screen_edges_deferring_system_gestures(&self) -> UIRectEdge {
-            self.ivars()
+            self.state
                 .preferred_screen_edges_deferring_system_gestures
                 .get()
         }
@@ -326,17 +348,17 @@ declare_class!(
 
 impl WinitViewController {
     pub(crate) fn set_prefers_status_bar_hidden(&self, val: bool) {
-        self.ivars().prefers_status_bar_hidden.set(val);
+        self.state.prefers_status_bar_hidden.set(val);
         self.setNeedsStatusBarAppearanceUpdate();
     }
 
     pub(crate) fn set_preferred_status_bar_style(&self, val: UIStatusBarStyle) {
-        self.ivars().preferred_status_bar_style.set(val);
+        self.state.preferred_status_bar_style.set(val);
         self.setNeedsStatusBarAppearanceUpdate();
     }
 
     pub(crate) fn set_prefers_home_indicator_auto_hidden(&self, val: bool) {
-        self.ivars().prefers_home_indicator_auto_hidden.set(val);
+        self.state.prefers_home_indicator_auto_hidden.set(val);
         let os_capabilities = app_state::os_capabilities();
         if os_capabilities.home_indicator_hidden {
             self.setNeedsUpdateOfHomeIndicatorAutoHidden();
@@ -346,7 +368,7 @@ impl WinitViewController {
     }
 
     pub(crate) fn set_preferred_screen_edges_deferring_system_gestures(&self, val: UIRectEdge) {
-        self.ivars()
+        self.state
             .preferred_screen_edges_deferring_system_gestures
             .set(val);
         let os_capabilities = app_state::os_capabilities();
@@ -379,7 +401,7 @@ impl WinitViewController {
                     | UIInterfaceOrientationMask::PortraitUpsideDown
             }
         };
-        self.ivars().supported_orientations.set(mask);
+        self.state.supported_orientations.set(mask);
         UIViewController::attemptRotationToDeviceOrientation();
     }
 
@@ -389,15 +411,7 @@ impl WinitViewController {
         platform_attributes: &PlatformSpecificWindowBuilderAttributes,
         view: &UIView,
     ) -> Id<Self> {
-        // These are set properly below, we just to set them to something in the meantime.
-        let this = Self::alloc().set_ivars(ViewControllerState {
-            prefers_status_bar_hidden: Cell::new(false),
-            preferred_status_bar_style: Cell::new(UIStatusBarStyle::Default),
-            prefers_home_indicator_auto_hidden: Cell::new(false),
-            supported_orientations: Cell::new(UIInterfaceOrientationMask::All),
-            preferred_screen_edges_deferring_system_gestures: Cell::new(UIRectEdge::NONE),
-        });
-        let this: Id<Self> = unsafe { msg_send_id![super(this), init] };
+        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), init] };
 
         this.set_prefers_status_bar_hidden(platform_attributes.prefers_status_bar_hidden);
 
@@ -432,8 +446,6 @@ declare_class!(
         const NAME: &'static str = "WinitUIWindow";
     }
 
-    impl DeclaredClass for WinitUIWindow {}
-
     unsafe impl WinitUIWindow {
         #[method(becomeKeyWindow)]
         fn become_key_window(&self) {
@@ -506,8 +518,6 @@ declare_class!(
         const NAME: &'static str = "WinitApplicationDelegate";
     }
 
-    impl DeclaredClass for WinitApplicationDelegate {}
-
     // UIApplicationDelegate protocol
     unsafe impl WinitApplicationDelegate {
         #[method(application:didFinishLaunchingWithOptions:)]

src/platform_impl/ios/window.rs

@@ -17,7 +17,7 @@ use crate::{
     icon::Icon,
     platform::ios::{ScreenEdge, StatusBarStyle, ValidOrientations},
     platform_impl::platform::{
-        app_state, monitor, EventLoopWindowTarget, Fullscreen, MonitorHandle, PlatformCustomCursor,
+        app_state, monitor, EventLoopWindowTarget, Fullscreen, MonitorHandle,
     },
     window::{
         CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme, UserAttentionType,
@@ -25,19 +25,6 @@ use crate::{
     },
 };
 
-#[derive(Debug, Clone)]
-pub(crate) struct OwnedWindowHandle {}
-
-impl OwnedWindowHandle {
-    #[cfg(feature = "rwh_06")]
-    pub(crate) fn new_parent_window(_handle: rwh_06::WindowHandle<'_>) -> Self {
-        // Parent windows are currently unsupported, though owned window
-        // handles would be implementable (would work similar to macOS).
-        warn!("parent windows are unsupported on iOS");
-        Self {}
-    }
-}
-
 pub struct Inner {
     window: Id<WinitUIWindow>,
     view_controller: Id<WinitViewController>,
@@ -190,10 +177,6 @@ impl Inner {
         debug!("`Window::set_cursor_icon` ignored on iOS")
     }
 
-    pub(crate) fn set_custom_cursor(&self, _: PlatformCustomCursor) {
-        debug!("`Window::set_custom_cursor` ignored on iOS")
-    }
-
     pub fn set_cursor_position(&self, _position: Position) -> Result<(), ExternalError> {
         Err(ExternalError::NotSupported(NotSupportedError::new()))
     }
@@ -372,14 +355,14 @@ impl Inner {
     }
 
     #[cfg(feature = "rwh_06")]
-    pub fn raw_window_handle_rwh_06(&self) -> rwh_06::RawWindowHandle {
+    pub fn raw_window_handle_rwh_06(&self) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
         let mut window_handle = rwh_06::UiKitWindowHandle::new({
             let ui_view = Id::as_ptr(&self.view) as _;
             std::ptr::NonNull::new(ui_view).expect("Id<T> should never be null")
         });
         window_handle.ui_view_controller =
             std::ptr::NonNull::new(Id::as_ptr(&self.view_controller) as _);
-        rwh_06::RawWindowHandle::UiKit(window_handle)
+        Ok(rwh_06::RawWindowHandle::UiKit(window_handle))
     }
 
     #[cfg(feature = "rwh_06")]
@@ -533,19 +516,7 @@ impl Window {
     }
 
     pub(crate) fn maybe_wait_on_main<R: Send>(&self, f: impl FnOnce(&Inner) -> R + Send) -> R {
-        self.inner.get_on_main(|inner| f(inner))
-    }
-
-    #[cfg(feature = "rwh_06")]
-    #[inline]
-    pub(crate) fn raw_window_handle_rwh_06(
-        &self,
-    ) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
-        if let Some(mtm) = MainThreadMarker::new() {
-            Ok(self.inner.get(mtm).raw_window_handle_rwh_06())
-        } else {
-            Err(rwh_06::HandleError::Unavailable)
-        }
+        self.inner.get_on_main(|inner, _mtm| f(inner))
     }
 }
 

src/platform_impl/linux/mod.rs

@@ -40,8 +40,6 @@ pub use x11::XNotSupported;
 #[cfg(x11_platform)]
 use x11::{util::WindowType as XWindowType, X11Error, XConnection, XError};
 
-pub(crate) use crate::cursor::OnlyCursorImage as PlatformCustomCursor;
-pub(crate) use crate::cursor::OnlyCursorImageBuilder as PlatformCustomCursorBuilder;
 pub(crate) use crate::icon::RgbaIcon as PlatformIcon;
 pub(crate) use crate::platform_impl::Fullscreen;
 
@@ -141,43 +139,6 @@ impl fmt::Display for OsError {
     }
 }
 
-#[derive(Debug, Clone)]
-#[allow(dead_code)]
-pub(crate) enum OwnedWindowHandle {
-    #[cfg(x11_platform)]
-    X(x11rb::protocol::xproto::Window),
-    #[cfg(wayland_platform)]
-    Wayland,
-}
-
-impl OwnedWindowHandle {
-    #[cfg(feature = "rwh_06")]
-    pub(crate) fn new_parent_window(handle: rwh_06::WindowHandle<'_>) -> Self {
-        // TODO: Do we need to do something extra to extend the lifetime of
-        // the window lives beyond the passed-in handle?
-        match handle.as_raw() {
-            #[cfg(x11_platform)]
-            rwh_06::RawWindowHandle::Xlib(handle) => {
-                Self::X(handle.window as x11rb::protocol::xproto::Window)
-            }
-            #[cfg(x11_platform)]
-            rwh_06::RawWindowHandle::Xcb(handle) => Self::X(handle.window.get()),
-            #[cfg(wayland_platform)]
-            rwh_06::RawWindowHandle::Wayland(_handle) => {
-                // Wayland does not currently support parent windows, but it
-                // could support owned handles.
-                Self::Wayland
-            }
-            #[cfg(not(x11_platform))]
-            handle => panic!("invalid window handle {handle:?} on Wayland"),
-            #[cfg(not(wayland_platform))]
-            handle => panic!("invalid window handle {handle:?} on X11"),
-            #[cfg(all(x11_platform, wayland_platform))]
-            handle => panic!("invalid window handle {handle:?} on X11 or Wayland"),
-        }
-    }
-}
-
 pub(crate) enum Window {
     #[cfg(x11_platform)]
     X(x11::Window),
@@ -463,11 +424,6 @@ impl Window {
         x11_or_wayland!(match self; Window(w) => w.set_cursor_icon(cursor))
     }
 
-    #[inline]
-    pub(crate) fn set_custom_cursor(&self, cursor: PlatformCustomCursor) {
-        x11_or_wayland!(match self; Window(w) => w.set_custom_cursor(cursor))
-    }
-
     #[inline]
     pub fn set_cursor_grab(&self, mode: CursorGrabMode) -> Result<(), ExternalError> {
         x11_or_wayland!(match self; Window(window) => window.set_cursor_grab(mode))
@@ -962,6 +918,10 @@ impl<T> EventLoopWindowTarget<T> {
         x11_or_wayland!(match self; Self(evlp) => evlp.control_flow())
     }
 
+    pub(crate) fn clear_exit(&self) {
+        x11_or_wayland!(match self; Self(evlp) => evlp.clear_exit())
+    }
+
     pub(crate) fn exit(&self) {
         x11_or_wayland!(match self; Self(evlp) => evlp.exit())
     }

src/platform_impl/linux/wayland/event_loop/mod.rs

@@ -467,44 +467,44 @@ impl<T: 'static> EventLoop<T> {
         });
 
         for window_id in window_ids.drain(..) {
-            let request_redraw = self.with_state(|state| {
+            let event = self.with_state(|state| {
                 let window_requests = state.window_requests.get_mut();
                 if window_requests.get(&window_id).unwrap().take_closed() {
                     mem::drop(window_requests.remove(&window_id));
                     mem::drop(state.windows.get_mut().remove(&window_id));
-                    false
-                } else {
-                    let mut window = state
-                        .windows
-                        .get_mut()
-                        .get_mut(&window_id)
-                        .unwrap()
-                        .lock()
-                        .unwrap();
-
-                    if window.frame_callback_state() == FrameCallbackState::Requested {
-                        false
-                    } else {
-                        // Reset the frame callbacks state.
-                        window.frame_callback_reset();
-                        let mut redraw_requested = window_requests
-                            .get(&window_id)
-                            .unwrap()
-                            .take_redraw_requested();
-
-                        // Redraw the frame while at it.
-                        redraw_requested |= window.refresh_frame();
-
-                        redraw_requested
-                    }
+                    return Some(WindowEvent::Destroyed);
                 }
+
+                let mut window = state
+                    .windows
+                    .get_mut()
+                    .get_mut(&window_id)
+                    .unwrap()
+                    .lock()
+                    .unwrap();
+
+                if window.frame_callback_state() == FrameCallbackState::Requested {
+                    return None;
+                }
+
+                // Reset the frame callbacks state.
+                window.frame_callback_reset();
+                let mut redraw_requested = window_requests
+                    .get(&window_id)
+                    .unwrap()
+                    .take_redraw_requested();
+
+                // Redraw the frame while at it.
+                redraw_requested |= window.refresh_frame();
+
+                redraw_requested.then_some(WindowEvent::RedrawRequested)
             });
 
-            if request_redraw {
+            if let Some(event) = event {
                 callback(
                     Event::WindowEvent {
                         window_id: crate::window::WindowId(window_id),
-                        event: WindowEvent::RedrawRequested,
+                        event,
                     },
                     &self.window_target,
                 );
@@ -629,6 +629,34 @@ pub struct EventLoopWindowTarget<T> {
 }
 
 impl<T> EventLoopWindowTarget<T> {
+    pub(crate) fn set_control_flow(&self, control_flow: ControlFlow) {
+        self.control_flow.set(control_flow)
+    }
+
+    pub(crate) fn control_flow(&self) -> ControlFlow {
+        self.control_flow.get()
+    }
+
+    pub(crate) fn exit(&self) {
+        self.exit.set(Some(0))
+    }
+
+    pub(crate) fn clear_exit(&self) {
+        self.exit.set(None)
+    }
+
+    pub(crate) fn exiting(&self) -> bool {
+        self.exit.get().is_some()
+    }
+
+    pub(crate) fn set_exit_code(&self, code: i32) {
+        self.exit.set(Some(code))
+    }
+
+    pub(crate) fn exit_code(&self) -> Option<i32> {
+        self.exit.get()
+    }
+
     #[inline]
     pub fn listen_device_events(&self, _allowed: DeviceEvents) {}
 

src/platform_impl/linux/wayland/output.rs

@@ -4,7 +4,6 @@ use sctk::reexports::client::Proxy;
 use sctk::output::OutputData;
 
 use crate::dpi::{LogicalPosition, PhysicalPosition, PhysicalSize};
-use crate::event_loop::ControlFlow;
 use crate::platform_impl::platform::VideoMode as PlatformVideoMode;
 
 use super::event_loop::EventLoopWindowTarget;
@@ -24,30 +23,6 @@ impl<T> EventLoopWindowTarget<T> {
         // There's no primary monitor on Wayland.
         None
     }
-
-    pub(crate) fn set_control_flow(&self, control_flow: ControlFlow) {
-        self.control_flow.set(control_flow)
-    }
-
-    pub(crate) fn control_flow(&self) -> ControlFlow {
-        self.control_flow.get()
-    }
-
-    pub(crate) fn exit(&self) {
-        self.exit.set(Some(0))
-    }
-
-    pub(crate) fn exiting(&self) -> bool {
-        self.exit.get().is_some()
-    }
-
-    pub(crate) fn set_exit_code(&self, code: i32) {
-        self.exit.set(Some(code))
-    }
-
-    pub(crate) fn exit_code(&self) -> Option<i32> {
-        self.exit.get()
-    }
 }
 
 #[derive(Clone, Debug)]

src/platform_impl/linux/wayland/state.rs

@@ -19,7 +19,6 @@ use sctk::seat::SeatState;
 use sctk::shell::xdg::window::{Window, WindowConfigure, WindowHandler};
 use sctk::shell::xdg::XdgShell;
 use sctk::shell::WaylandSurface;
-use sctk::shm::slot::SlotPool;
 use sctk::shm::{Shm, ShmHandler};
 use sctk::subcompositor::SubcompositorState;
 
@@ -59,9 +58,6 @@ pub struct WinitState {
     /// The shm for software buffers, such as cursors.
     pub shm: Shm,
 
-    /// The pool where custom cursors are allocated.
-    pub custom_cursor_pool: Arc<Mutex<SlotPool>>,
-
     /// The XDG shell that is used for widnows.
     pub xdg_shell: XdgShell,
 
@@ -157,17 +153,13 @@ impl WinitState {
                 (None, None)
             };
 
-        let shm = Shm::bind(globals, queue_handle).map_err(WaylandError::Bind)?;
-        let custom_cursor_pool = Arc::new(Mutex::new(SlotPool::new(2, &shm).unwrap()));
-
         Ok(Self {
             registry_state,
             compositor_state: Arc::new(compositor_state),
             subcompositor_state: subcompositor_state.map(Arc::new),
             output_state,
             seat_state,
-            shm,
-            custom_cursor_pool,
+            shm: Shm::bind(globals, queue_handle).map_err(WaylandError::Bind)?,
 
             xdg_shell: XdgShell::bind(globals, queue_handle).map_err(WaylandError::Bind)?,
             xdg_activation: XdgActivationState::bind(globals, queue_handle).ok(),

src/platform_impl/linux/wayland/types/cursor.rs

@@ -1,56 +0,0 @@
-use cursor_icon::CursorIcon;
-
-use sctk::reexports::client::protocol::wl_shm::Format;
-use sctk::shm::slot::{Buffer, SlotPool};
-
-use crate::cursor::CursorImage;
-
-#[derive(Debug)]
-pub enum SelectedCursor {
-    Named(CursorIcon),
-    Custom(CustomCursor),
-}
-
-impl Default for SelectedCursor {
-    fn default() -> Self {
-        Self::Named(Default::default())
-    }
-}
-
-#[derive(Debug)]
-pub struct CustomCursor {
-    pub buffer: Buffer,
-    pub w: i32,
-    pub h: i32,
-    pub hotspot_x: i32,
-    pub hotspot_y: i32,
-}
-
-impl CustomCursor {
-    pub(crate) fn new(pool: &mut SlotPool, image: &CursorImage) -> Self {
-        let (buffer, canvas) = pool
-            .create_buffer(
-                image.width as i32,
-                image.height as i32,
-                4 * (image.width as i32),
-                Format::Argb8888,
-            )
-            .unwrap();
-
-        for (canvas_chunk, rgba_chunk) in canvas.chunks_exact_mut(4).zip(image.rgba.chunks_exact(4))
-        {
-            canvas_chunk[0] = rgba_chunk[2];
-            canvas_chunk[1] = rgba_chunk[1];
-            canvas_chunk[2] = rgba_chunk[0];
-            canvas_chunk[3] = rgba_chunk[3];
-        }
-
-        CustomCursor {
-            buffer,
-            w: image.width as i32,
-            h: image.height as i32,
-            hotspot_x: image.hotspot_x as i32,
-            hotspot_y: image.hotspot_y as i32,
-        }
-    }
-}

src/platform_impl/linux/wayland/types/mod.rs

@@ -1,6 +1,5 @@
 //! Wayland protocol implementation boilerplate.
 
-pub mod cursor;
 pub mod kwin_blur;
 pub mod wp_fractional_scaling;
 pub mod wp_viewporter;

src/platform_impl/linux/wayland/window/mod.rs

@@ -20,8 +20,8 @@ use crate::error::{ExternalError, NotSupportedError, OsError as RootOsError};
 use crate::event::{Ime, WindowEvent};
 use crate::event_loop::AsyncRequestSerial;
 use crate::platform_impl::{
-    Fullscreen, MonitorHandle as PlatformMonitorHandle, OsError, PlatformCustomCursor,
-    PlatformIcon, PlatformSpecificWindowBuilderAttributes as PlatformAttributes,
+    Fullscreen, MonitorHandle as PlatformMonitorHandle, OsError, PlatformIcon,
+    PlatformSpecificWindowBuilderAttributes as PlatformAttributes,
 };
 use crate::window::{
     CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme, UserAttentionType,
@@ -506,14 +506,6 @@ impl Window {
         self.window_state.lock().unwrap().set_cursor(cursor);
     }
 
-    #[inline]
-    pub(crate) fn set_custom_cursor(&self, cursor: PlatformCustomCursor) {
-        self.window_state
-            .lock()
-            .unwrap()
-            .set_custom_cursor(&cursor.0);
-    }
-
     #[inline]
     pub fn set_cursor_visible(&self, visible: bool) {
         self.window_state

src/platform_impl/linux/wayland/window/state.rs

@@ -1,7 +1,7 @@
 //! The state of the window, which is shared with the event-loop.
 
 use std::num::NonZeroU32;
-use std::sync::{Arc, Mutex, Weak};
+use std::sync::{Arc, Weak};
 use std::time::Duration;
 
 use log::{info, warn};
@@ -18,23 +18,20 @@ use sctk::reexports::protocols::wp::text_input::zv3::client::zwp_text_input_v3::
 use sctk::reexports::protocols::wp::viewporter::client::wp_viewport::WpViewport;
 use sctk::reexports::protocols::xdg::shell::client::xdg_toplevel::ResizeEdge as XdgResizeEdge;
 
-use sctk::compositor::{CompositorState, Region, SurfaceData, SurfaceDataExt};
-use sctk::seat::pointer::{PointerDataExt, ThemedPointer};
+use sctk::compositor::{CompositorState, Region};
+use sctk::seat::pointer::ThemedPointer;
 use sctk::shell::xdg::window::{DecorationMode, Window, WindowConfigure};
 use sctk::shell::xdg::XdgSurface;
 use sctk::shell::WaylandSurface;
-use sctk::shm::slot::SlotPool;
 use sctk::shm::Shm;
 use sctk::subcompositor::SubcompositorState;
 use wayland_protocols_plasma::blur::client::org_kde_kwin_blur::OrgKdeKwinBlur;
 
-use crate::cursor::CursorImage;
 use crate::dpi::{LogicalPosition, LogicalSize, PhysicalSize, Size};
 use crate::error::{ExternalError, NotSupportedError};
 use crate::event::WindowEvent;
 use crate::platform_impl::wayland::event_loop::sink::EventSink;
 use crate::platform_impl::wayland::make_wid;
-use crate::platform_impl::wayland::types::cursor::{CustomCursor, SelectedCursor};
 use crate::platform_impl::wayland::types::kwin_blur::KWinBlurManager;
 use crate::platform_impl::WindowId;
 use crate::window::{CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme};
@@ -63,16 +60,14 @@ pub struct WindowState {
     /// The `Shm` to set cursor.
     pub shm: WlShm,
 
-    // A shared pool where to allocate custom cursors.
-    custom_cursor_pool: Arc<Mutex<SlotPool>>,
-
     /// The last received configure.
     pub last_configure: Option<WindowConfigure>,
 
     /// The pointers observed on the window.
     pub pointers: Vec<Weak<ThemedPointer<WinitPointerData>>>,
 
-    selected_cursor: SelectedCursor,
+    /// Cursor icon.
+    pub cursor_icon: CursorIcon,
 
     /// Wether the cursor is visible.
     pub cursor_visible: bool,
@@ -183,7 +178,7 @@ impl WindowState {
             connection,
             csd_fails: false,
             cursor_grab_mode: GrabState::new(),
-            selected_cursor: Default::default(),
+            cursor_icon: CursorIcon::Default,
             cursor_visible: true,
             decorate: true,
             fractional_scale,
@@ -202,7 +197,6 @@ impl WindowState {
             resizable: true,
             scale_factor: 1.,
             shm: winit_state.shm.wl_shm().clone(),
-            custom_cursor_pool: winit_state.custom_cursor_pool.clone(),
             size: initial_size.to_logical(1.),
             stateless_size: initial_size.to_logical(1.),
             initial_size: Some(initial_size),
@@ -622,10 +616,7 @@ impl WindowState {
     /// Reload the cursor style on the given window.
     pub fn reload_cursor_style(&mut self) {
         if self.cursor_visible {
-            match &self.selected_cursor {
-                SelectedCursor::Named(icon) => self.set_cursor(*icon),
-                SelectedCursor::Custom(cursor) => self.apply_custom_cursor(cursor),
-            }
+            self.set_cursor(self.cursor_icon);
         } else {
             self.set_cursor_visible(self.cursor_visible);
         }
@@ -711,8 +702,10 @@ impl WindowState {
     }
 
     /// Set the cursor icon.
+    ///
+    /// Providing `None` will hide the cursor.
     pub fn set_cursor(&mut self, cursor_icon: CursorIcon) {
-        self.selected_cursor = SelectedCursor::Named(cursor_icon);
+        self.cursor_icon = cursor_icon;
 
         if !self.cursor_visible {
             return;
@@ -725,54 +718,6 @@ impl WindowState {
         })
     }
 
-    /// Set the custom cursor icon.
-    pub(crate) fn set_custom_cursor(&mut self, cursor: &CursorImage) {
-        let cursor = {
-            let mut pool = self.custom_cursor_pool.lock().unwrap();
-            CustomCursor::new(&mut pool, cursor)
-        };
-
-        if self.cursor_visible {
-            self.apply_custom_cursor(&cursor);
-        }
-
-        self.selected_cursor = SelectedCursor::Custom(cursor);
-    }
-
-    fn apply_custom_cursor(&self, cursor: &CustomCursor) {
-        self.apply_on_poiner(|pointer, _| {
-            let surface = pointer.surface();
-
-            let scale = surface
-                .data::<SurfaceData>()
-                .unwrap()
-                .surface_data()
-                .scale_factor();
-
-            surface.set_buffer_scale(scale);
-            surface.attach(Some(cursor.buffer.wl_buffer()), 0, 0);
-            if surface.version() >= 4 {
-                surface.damage_buffer(0, 0, cursor.w, cursor.h);
-            } else {
-                surface.damage(0, 0, cursor.w / scale, cursor.h / scale);
-            }
-            surface.commit();
-
-            let serial = pointer
-                .pointer()
-                .data::<WinitPointerData>()
-                .and_then(|data| data.pointer_data().latest_enter_serial())
-                .unwrap();
-
-            pointer.pointer().set_cursor(
-                serial,
-                Some(surface),
-                cursor.hotspot_x / scale,
-                cursor.hotspot_y / scale,
-            );
-        });
-    }
-
     /// Set maximum inner window size.
     pub fn set_min_inner_size(&mut self, size: Option<LogicalSize<u32>>) {
         // Ensure that the window has the right minimum size.
@@ -907,10 +852,7 @@ impl WindowState {
         self.cursor_visible = cursor_visible;
 
         if self.cursor_visible {
-            match &self.selected_cursor {
-                SelectedCursor::Named(icon) => self.set_cursor(*icon),
-                SelectedCursor::Custom(cursor) => self.apply_custom_cursor(cursor),
-            }
+            self.set_cursor(self.cursor_icon);
         } else {
             for pointer in self.pointers.iter().filter_map(|pointer| pointer.upgrade()) {
                 let latest_enter_serial = pointer.pointer().winit_data().latest_enter_serial();

src/platform_impl/linux/x11/event_processor.rs

@@ -1413,6 +1413,9 @@ impl<T: 'static> EventProcessor<T> {
         F: FnMut(Event<T>),
     {
         let wt = get_xtarget(&self.target);
+        wt.xconn
+            .reload_database()
+            .expect("failed to reload Xft database");
 
         // In the future, it would be quite easy to emit monitor hotplug events.
         let prev_list = {

src/platform_impl/linux/x11/mod.rs

@@ -752,6 +752,10 @@ impl<T> EventLoopWindowTarget<T> {
         self.exit.set(Some(0))
     }
 
+    pub(crate) fn clear_exit(&self) {
+        self.exit.set(None)
+    }
+
     pub(crate) fn exiting(&self) -> bool {
         self.exit.get().is_some()
     }

src/platform_impl/linux/x11/monitor.rs

@@ -284,22 +284,16 @@ impl XConnection {
 
     pub fn available_monitors(&self) -> Result<Vec<MonitorHandle>, X11Error> {
         let mut monitors_lock = self.monitor_handles.lock().unwrap();
-        (*monitors_lock)
-            .as_ref()
-            .cloned()
-            .map(Ok)
-            .or_else(|| {
-                self.query_monitor_list()
-                    .map(|mon_list| {
-                        let monitors = Some(mon_list);
-                        if !DISABLE_MONITOR_LIST_CACHING {
-                            (*monitors_lock) = monitors.clone();
-                        }
-                        monitors
-                    })
-                    .transpose()
-            })
-            .unwrap()
+        match *monitors_lock {
+            Some(ref monitors) => Ok(monitors.clone()),
+            None => {
+                let monitors = self.query_monitor_list()?;
+                if !DISABLE_MONITOR_LIST_CACHING {
+                    *monitors_lock = Some(monitors.clone());
+                }
+                Ok(monitors)
+            }
+        }
     }
 
     #[inline]

src/platform_impl/linux/x11/util/cursor.rs

@@ -1,8 +1,9 @@
-use std::{ffi::CString, iter, slice, sync::Arc};
+use std::ffi::CString;
+use std::iter;
 
 use x11rb::connection::Connection;
 
-use crate::{cursor::CursorImage, window::CursorIcon};
+use crate::window::CursorIcon;
 
 use super::*;
 
@@ -19,11 +20,6 @@ impl XConnection {
             .expect("Failed to set cursor");
     }
 
-    pub(crate) fn set_custom_cursor(&self, window: xproto::Window, cursor: &CustomCursor) {
-        self.update_cursor(window, cursor.inner.cursor)
-            .expect("Failed to set cursor");
-    }
-
     fn create_empty_cursor(&self) -> ffi::Cursor {
         let data = 0;
         let pixmap = unsafe {
@@ -91,74 +87,3 @@ impl XConnection {
         Ok(())
     }
 }
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum SelectedCursor {
-    Custom(CustomCursor),
-    Named(CursorIcon),
-}
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct CustomCursor {
-    inner: Arc<CustomCursorInner>,
-}
-
-impl CustomCursor {
-    pub(crate) unsafe fn new(xconn: &Arc<XConnection>, image: &CursorImage) -> Self {
-        unsafe {
-            let ximage =
-                (xconn.xcursor.XcursorImageCreate)(image.width as i32, image.height as i32);
-            if ximage.is_null() {
-                panic!("failed to allocate cursor image");
-            }
-            (*ximage).xhot = image.hotspot_x as u32;
-            (*ximage).yhot = image.hotspot_y as u32;
-            (*ximage).delay = 0;
-
-            let dst = slice::from_raw_parts_mut((*ximage).pixels, image.rgba.len() / 4);
-            for (dst, chunk) in dst.iter_mut().zip(image.rgba.chunks_exact(4)) {
-                *dst = (chunk[0] as u32) << 16
-                    | (chunk[1] as u32) << 8
-                    | (chunk[2] as u32)
-                    | (chunk[3] as u32) << 24;
-            }
-
-            let cursor = (xconn.xcursor.XcursorImageLoadCursor)(xconn.display, ximage);
-            (xconn.xcursor.XcursorImageDestroy)(ximage);
-            Self {
-                inner: Arc::new(CustomCursorInner {
-                    xconn: xconn.clone(),
-                    cursor,
-                }),
-            }
-        }
-    }
-}
-
-#[derive(Debug)]
-struct CustomCursorInner {
-    xconn: Arc<XConnection>,
-    cursor: ffi::Cursor,
-}
-
-impl Drop for CustomCursorInner {
-    fn drop(&mut self) {
-        unsafe {
-            (self.xconn.xlib.XFreeCursor)(self.xconn.display, self.cursor);
-        }
-    }
-}
-
-impl PartialEq for CustomCursorInner {
-    fn eq(&self, other: &Self) -> bool {
-        self.cursor == other.cursor
-    }
-}
-
-impl Eq for CustomCursorInner {}
-
-impl Default for SelectedCursor {
-    fn default() -> Self {
-        SelectedCursor::Named(Default::default())
-    }
-}

src/platform_impl/linux/x11/util/mod.rs

@@ -13,7 +13,7 @@ mod randr;
 mod window_property;
 mod wm;
 
-pub use self::{cursor::*, geometry::*, hint::*, input::*, window_property::*, wm::*};
+pub use self::{geometry::*, hint::*, input::*, window_property::*, wm::*};
 
 use std::{
     mem::{self, MaybeUninit},

src/platform_impl/linux/x11/window.rs

@@ -7,10 +7,9 @@ use std::{
     sync::{Arc, Mutex, MutexGuard},
 };
 
-use cursor_icon::CursorIcon;
 use x11rb::{
     connection::Connection,
-    properties::{WmHints, WmHintsState, WmSizeHints, WmSizeHintsSpecification},
+    properties::{WmHints, WmSizeHints, WmSizeHintsSpecification},
     protocol::{
         randr,
         shape::SK,
@@ -30,20 +29,17 @@ use crate::{
             atoms::*, xinput_fp1616_to_float, MonitorHandle as X11MonitorHandle, WakeSender,
             X11Error,
         },
-        OwnedWindowHandle as PlatformOwnedWindowHandle,
-        Fullscreen, MonitorHandle as PlatformMonitorHandle, OsError, PlatformCustomCursor,
-        PlatformIcon, PlatformSpecificWindowBuilderAttributes, VideoMode as PlatformVideoMode,
+        Fullscreen, MonitorHandle as PlatformMonitorHandle, OsError, PlatformIcon,
+        PlatformSpecificWindowBuilderAttributes, VideoMode as PlatformVideoMode,
     },
     window::{
-        CursorGrabMode, ImePurpose, ResizeDirection, Theme, UserAttentionType, WindowAttributes,
-        WindowButtons, WindowLevel,
+        CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme, UserAttentionType,
+        WindowAttributes, WindowButtons, WindowLevel,
     },
 };
 
 use super::{
-    ffi,
-    util::{self, CustomCursor, SelectedCursor},
-    CookieResultExt, EventLoopWindowTarget, ImeRequest, ImeSender, VoidCookie, WindowId,
+    ffi, util, CookieResultExt, EventLoopWindowTarget, ImeRequest, ImeSender, VoidCookie, WindowId,
     XConnection,
 };
 
@@ -130,7 +126,7 @@ pub(crate) struct UnownedWindow {
     root: xproto::Window,               // never changes
     #[allow(dead_code)]
     screen_id: i32, // never changes
-    selected_cursor: Mutex<SelectedCursor>,
+    cursor: Mutex<CursorIcon>,
     cursor_grabbed_mode: Mutex<CursorGrabMode>,
     #[allow(clippy::mutex_atomic)]
     cursor_visible: Mutex<bool>,
@@ -158,12 +154,15 @@ impl UnownedWindow {
     ) -> Result<UnownedWindow, RootOsError> {
         let xconn = &event_loop.xconn;
         let atoms = xconn.atoms();
-        let root = match window_attrs.parent_window {
-            Some(PlatformOwnedWindowHandle::X(handle)) => handle,
-            #[cfg(wayland_platform)]
-            Some(handle) => panic!("invalid window handle {handle:?} on X11"),
+        #[cfg(feature = "rwh_06")]
+        let root = match window_attrs.parent_window.0 {
+            Some(rwh_06::RawWindowHandle::Xlib(handle)) => handle.window as xproto::Window,
+            Some(rwh_06::RawWindowHandle::Xcb(handle)) => handle.window.get(),
+            Some(raw) => unreachable!("Invalid raw window handle {raw:?} on X11"),
             None => event_loop.root,
         };
+        #[cfg(not(feature = "rwh_06"))]
+        let root = event_loop.root;
 
         let mut monitors = leap!(xconn.available_monitors());
         let guessed_monitor = if monitors.is_empty() {
@@ -356,7 +355,7 @@ impl UnownedWindow {
             visual,
             root,
             screen_id,
-            selected_cursor: Default::default(),
+            cursor: Default::default(),
             cursor_grabbed_mode: Mutex::new(CursorGrabMode::None),
             cursor_visible: Mutex::new(true),
             ime_sender: Mutex::new(event_loop.ime_sender.clone()),
@@ -988,7 +987,7 @@ impl UnownedWindow {
                     xproto::EventMask::SUBSTRUCTURE_REDIRECT
                         | xproto::EventMask::SUBSTRUCTURE_NOTIFY,
                 ),
-                [WmHintsState::Iconic as u32, 0, 0, 0, 0],
+                [3u32, 0, 0, 0, 0],
             )
         } else {
             self.xconn.send_client_msg(
@@ -1536,29 +1535,13 @@ impl UnownedWindow {
 
     #[inline]
     pub fn set_cursor_icon(&self, cursor: CursorIcon) {
-        let old_cursor = replace(
-            &mut *self.selected_cursor.lock().unwrap(),
-            SelectedCursor::Named(cursor),
-        );
-
+        let old_cursor = replace(&mut *self.cursor.lock().unwrap(), cursor);
         #[allow(clippy::mutex_atomic)]
-        if SelectedCursor::Named(cursor) != old_cursor && *self.cursor_visible.lock().unwrap() {
+        if cursor != old_cursor && *self.cursor_visible.lock().unwrap() {
             self.xconn.set_cursor_icon(self.xwindow, Some(cursor));
         }
     }
 
-    #[inline]
-    pub(crate) fn set_custom_cursor(&self, cursor: PlatformCustomCursor) {
-        let new_cursor = unsafe { CustomCursor::new(&self.xconn, &cursor.0) };
-
-        #[allow(clippy::mutex_atomic)]
-        if *self.cursor_visible.lock().unwrap() {
-            self.xconn.set_custom_cursor(self.xwindow, &new_cursor);
-        }
-
-        *self.selected_cursor.lock().unwrap() = SelectedCursor::Custom(new_cursor);
-    }
-
     #[inline]
     pub fn set_cursor_grab(&self, mode: CursorGrabMode) -> Result<(), ExternalError> {
         let mut grabbed_lock = self.cursor_grabbed_mode.lock().unwrap();
@@ -1645,23 +1628,13 @@ impl UnownedWindow {
             return;
         }
         let cursor = if visible {
-            Some((*self.selected_cursor.lock().unwrap()).clone())
+            Some(*self.cursor.lock().unwrap())
         } else {
             None
         };
         *visible_lock = visible;
         drop(visible_lock);
-        match cursor {
-            Some(SelectedCursor::Custom(cursor)) => {
-                self.xconn.set_custom_cursor(self.xwindow, &cursor);
-            }
-            Some(SelectedCursor::Named(cursor)) => {
-                self.xconn.set_cursor_icon(self.xwindow, Some(cursor));
-            }
-            None => {
-                self.xconn.set_cursor_icon(self.xwindow, None);
-            }
-        }
+        self.xconn.set_cursor_icon(self.xwindow, cursor);
     }
 
     #[inline]

src/platform_impl/linux/x11/xdisplay.rs

@@ -4,7 +4,7 @@ use std::{
     fmt, ptr,
     sync::{
         atomic::{AtomicU32, Ordering},
-        Arc, Mutex,
+        Arc, Mutex, RwLock, RwLockReadGuard,
     },
 };
 
@@ -45,7 +45,7 @@ pub(crate) struct XConnection {
     pub monitor_handles: Mutex<Option<Vec<MonitorHandle>>>,
 
     /// The resource database.
-    database: resource_manager::Database,
+    database: RwLock<resource_manager::Database>,
 
     pub latest_error: Mutex<Option<XError>>,
     pub cursor_cache: Mutex<HashMap<Option<CursorIcon>, ffi::Cursor>>,
@@ -115,7 +115,7 @@ impl XConnection {
             timestamp: AtomicU32::new(0),
             latest_error: Mutex::new(None),
             monitor_handles: Mutex::new(None),
-            database,
+            database: RwLock::new(database),
             cursor_cache: Default::default(),
         })
     }
@@ -159,8 +159,16 @@ impl XConnection {
 
     /// Get the resource database.
     #[inline]
-    pub fn database(&self) -> &resource_manager::Database {
-        &self.database
+    pub fn database(&self) -> RwLockReadGuard<'_, resource_manager::Database> {
+        self.database.read().unwrap_or_else(|e| e.into_inner())
+    }
+
+    /// Reload the resource database.
+    #[inline]
+    pub fn reload_database(&self) -> Result<(), super::X11Error> {
+        let database = resource_manager::new_from_default(self.xcb_connection())?;
+        *self.database.write().unwrap_or_else(|e| e.into_inner()) = database;
+        Ok(())
     }
 
     /// Get the latest timestamp.

src/platform_impl/macos/app.rs

@@ -1,30 +1,23 @@
 #![allow(clippy::unnecessary_cast)]
 
-use icrate::AppKit::{
-    NSApplication, NSEvent, NSEventModifierFlagCommand, NSEventTypeKeyUp, NSEventTypeLeftMouseDown,
-    NSEventTypeLeftMouseDragged, NSEventTypeLeftMouseUp, NSEventTypeMouseMoved,
-    NSEventTypeOtherMouseDown, NSEventTypeOtherMouseDragged, NSEventTypeOtherMouseUp,
-    NSEventTypeRightMouseDown, NSEventTypeRightMouseDragged, NSEventTypeRightMouseUp, NSResponder,
-};
 use icrate::Foundation::NSObject;
-use objc2::{declare_class, msg_send, mutability, ClassType, DeclaredClass};
+use objc2::{declare_class, msg_send, mutability, ClassType};
 
-use super::event::flags_contains;
+use super::appkit::{NSApplication, NSEvent, NSEventModifierFlags, NSEventType, NSResponder};
 use super::{app_state::AppState, DEVICE_ID};
 use crate::event::{DeviceEvent, ElementState, Event};
 
 declare_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
     pub(super) struct WinitApplication;
 
     unsafe impl ClassType for WinitApplication {
         #[inherits(NSResponder, NSObject)]
         type Super = NSApplication;
-        type Mutability = mutability::MainThreadOnly;
+        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitApplication";
     }
 
-    impl DeclaredClass for WinitApplication {}
-
     unsafe impl WinitApplication {
         // Normally, holding Cmd + any key never sends us a `keyUp` event for that key.
         // Overriding `sendEvent:` like this fixes that. (https://stackoverflow.com/a/15294196)
@@ -34,13 +27,13 @@ declare_class!(
             // For posterity, there are some undocumented event types
             // (https://github.com/servo/cocoa-rs/issues/155)
             // but that doesn't really matter here.
-            let event_type = unsafe { event.r#type() };
-            let modifier_flags = unsafe { event.modifierFlags() };
-            if event_type == NSEventTypeKeyUp
-                && flags_contains(modifier_flags, NSEventModifierFlagCommand)
+            let event_type = event.type_();
+            let modifier_flags = event.modifierFlags();
+            if event_type == NSEventType::NSKeyUp
+                && modifier_flags.contains(NSEventModifierFlags::NSCommandKeyMask)
             {
                 if let Some(key_window) = self.keyWindow() {
-                    key_window.sendEvent(event);
+                    unsafe { key_window.sendEvent(event) };
                 }
             } else {
                 maybe_dispatch_device_event(event);
@@ -51,15 +44,14 @@ declare_class!(
 );
 
 fn maybe_dispatch_device_event(event: &NSEvent) {
-    let event_type = unsafe { event.r#type() };
-    #[allow(non_upper_case_globals)]
+    let event_type = event.type_();
     match event_type {
-        NSEventTypeMouseMoved
-        | NSEventTypeLeftMouseDragged
-        | NSEventTypeOtherMouseDragged
-        | NSEventTypeRightMouseDragged => {
-            let delta_x = unsafe { event.deltaX() } as f64;
-            let delta_y = unsafe { event.deltaY() } as f64;
+        NSEventType::NSMouseMoved
+        | NSEventType::NSLeftMouseDragged
+        | NSEventType::NSOtherMouseDragged
+        | NSEventType::NSRightMouseDragged => {
+            let delta_x = event.deltaX() as f64;
+            let delta_y = event.deltaY() as f64;
 
             if delta_x != 0.0 {
                 queue_device_event(DeviceEvent::Motion {
@@ -81,15 +73,17 @@ fn maybe_dispatch_device_event(event: &NSEvent) {
                 });
             }
         }
-        NSEventTypeLeftMouseDown | NSEventTypeRightMouseDown | NSEventTypeOtherMouseDown => {
+        NSEventType::NSLeftMouseDown
+        | NSEventType::NSRightMouseDown
+        | NSEventType::NSOtherMouseDown => {
             queue_device_event(DeviceEvent::Button {
-                button: unsafe { event.buttonNumber() } as u32,
+                button: event.buttonNumber() as u32,
                 state: ElementState::Pressed,
             });
         }
-        NSEventTypeLeftMouseUp | NSEventTypeRightMouseUp | NSEventTypeOtherMouseUp => {
+        NSEventType::NSLeftMouseUp | NSEventType::NSRightMouseUp | NSEventType::NSOtherMouseUp => {
             queue_device_event(DeviceEvent::Button {
-                button: unsafe { event.buttonNumber() } as u32,
+                button: event.buttonNumber() as u32,
                 state: ElementState::Released,
             });
         }

src/platform_impl/macos/app_delegate.rs

@@ -1,41 +1,54 @@
-use icrate::AppKit::{NSApplicationActivationPolicy, NSApplicationDelegate};
-use icrate::Foundation::{MainThreadMarker, NSObject, NSObjectProtocol};
+use std::ptr::NonNull;
+
+use icrate::Foundation::NSObject;
+use objc2::declare::{IvarBool, IvarEncode};
 use objc2::rc::Id;
 use objc2::runtime::AnyObject;
-use objc2::{declare_class, msg_send_id, mutability, ClassType, DeclaredClass};
+use objc2::{declare_class, msg_send, msg_send_id, mutability, ClassType};
 
 use super::app_state::AppState;
-
-#[derive(Debug)]
-pub(super) struct State {
-    activation_policy: NSApplicationActivationPolicy,
-    default_menu: bool,
-    activate_ignoring_other_apps: bool,
-}
+use super::appkit::NSApplicationActivationPolicy;
 
 declare_class!(
-    pub(super) struct ApplicationDelegate;
+    #[derive(Debug)]
+    pub(super) struct ApplicationDelegate {
+        activation_policy: IvarEncode<NSApplicationActivationPolicy, "_activation_policy">,
+        default_menu: IvarBool<"_default_menu">,
+        activate_ignoring_other_apps: IvarBool<"_activate_ignoring_other_apps">,
+    }
+
+    mod ivars;
 
     unsafe impl ClassType for ApplicationDelegate {
         type Super = NSObject;
-        type Mutability = mutability::MainThreadOnly;
+        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitApplicationDelegate";
     }
 
-    impl DeclaredClass for ApplicationDelegate {
-        type Ivars = State;
-    }
+    unsafe impl ApplicationDelegate {
+        #[method(initWithActivationPolicy:defaultMenu:activateIgnoringOtherApps:)]
+        unsafe fn init(
+            this: *mut Self,
+            activation_policy: NSApplicationActivationPolicy,
+            default_menu: bool,
+            activate_ignoring_other_apps: bool,
+        ) -> Option<NonNull<Self>> {
+            let this: Option<&mut Self> = unsafe { msg_send![super(this), init] };
+            this.map(|this| {
+                *this.activation_policy = activation_policy;
+                *this.default_menu = default_menu;
+                *this.activate_ignoring_other_apps = activate_ignoring_other_apps;
+                NonNull::from(this)
+            })
+        }
 
-    unsafe impl NSObjectProtocol for ApplicationDelegate {}
-
-    unsafe impl NSApplicationDelegate for ApplicationDelegate {
         #[method(applicationDidFinishLaunching:)]
         fn did_finish_launching(&self, _sender: Option<&AnyObject>) {
             trace_scope!("applicationDidFinishLaunching:");
             AppState::launched(
-                self.ivars().activation_policy,
-                self.ivars().default_menu,
-                self.ivars().activate_ignoring_other_apps,
+                *self.activation_policy,
+                *self.default_menu,
+                *self.activate_ignoring_other_apps,
             );
         }
 
@@ -50,16 +63,17 @@ declare_class!(
 
 impl ApplicationDelegate {
     pub(super) fn new(
-        mtm: MainThreadMarker,
         activation_policy: NSApplicationActivationPolicy,
         default_menu: bool,
         activate_ignoring_other_apps: bool,
     ) -> Id<Self> {
-        let this = mtm.alloc().set_ivars(State {
-            activation_policy,
-            default_menu,
-            activate_ignoring_other_apps,
-        });
-        unsafe { msg_send_id![super(this), init] }
+        unsafe {
+            msg_send_id![
+                Self::alloc(),
+                initWithActivationPolicy: activation_policy,
+                defaultMenu: default_menu,
+                activateIgnoringOtherApps: activate_ignoring_other_apps,
+            ]
+        }
     }
 }

src/platform_impl/macos/app_state.rs

@@ -12,14 +12,13 @@ use std::{
 };
 
 use core_foundation::runloop::{CFRunLoopGetMain, CFRunLoopWakeUp};
-use icrate::AppKit::{NSApplication, NSApplicationActivationPolicy};
-use icrate::Foundation::{is_main_thread, MainThreadMarker, NSSize};
+use icrate::Foundation::{is_main_thread, NSSize};
 use objc2::rc::{autoreleasepool, Id};
 use once_cell::sync::Lazy;
 
+use super::appkit::{NSApp, NSApplication, NSApplicationActivationPolicy, NSEvent};
 use super::{
-    event::dummy_event, event_loop::PanicInfo, menu, observer::EventLoopWaker, util::Never,
-    window::WinitWindow,
+    event_loop::PanicInfo, menu, observer::EventLoopWaker, util::Never, window::WinitWindow,
 };
 use crate::{
     dpi::PhysicalSize,
@@ -58,14 +57,14 @@ impl<T> EventLoopHandler<T> {
     where
         F: FnOnce(&mut EventLoopHandler<T>, RefMut<'_, dyn FnMut(Event<T>, &RootWindowTarget<T>)>),
     {
-        // `NSApplication` and our `HANDLER` are global state and so it's possible
-        // that we could get a delegate callback after the application has exit an
+        // The `NSApp` and our `HANDLER` are global state and so it's possible that
+        // we could get a delegate callback after the application has exit an
         // `EventLoop`. If the loop has been exit then our weak `self.callback`
         // will fail to upgrade.
         //
         // We don't want to panic or output any verbose logging if we fail to
         // upgrade the weak reference since it might be valid that the application
-        // re-starts the `NSApplication` after exiting a Winit `EventLoop`
+        // re-starts the `NSApp` after exiting a Winit `EventLoop`
         if let Some(callback) = self.callback.upgrade() {
             let callback = callback.borrow_mut();
             (f)(self, callback);
@@ -145,9 +144,9 @@ impl Handler {
 
     /// `true` after `ApplicationDelegate::applicationDidFinishLaunching` called
     ///
-    /// NB: This is global / `NSApplication` state and since the app will only
-    /// be launched once but an `EventLoop` may be run more than once then only
-    /// the first `EventLoop` will observe the application before it is launched.
+    /// NB: This is global / `NSApp` state and since the app will only be launched
+    /// once but an `EventLoop` may be run more than once then only the first
+    /// `EventLoop` will observe the `NSApp` before it is launched.
     fn is_launched(&self) -> bool {
         self.launched.load(Ordering::Acquire)
     }
@@ -159,8 +158,8 @@ impl Handler {
 
     /// `true` if an `EventLoop` is currently running
     ///
-    /// NB: This is global / `NSApplication` state and may persist beyond the
-    /// lifetime of a running `EventLoop`.
+    /// NB: This is global / `NSApp` state and may persist beyond the lifetime of
+    /// a running `EventLoop`.
     ///
     /// # Caveat
     /// This is only intended to be called from the main thread
@@ -168,7 +167,7 @@ impl Handler {
         self.running.load(Ordering::Relaxed)
     }
 
-    /// Set when an `EventLoop` starts running, after the `NSApplication` is launched
+    /// Set when an `EventLoop` starts running, after the `NSApp` is launched
     ///
     /// # Caveat
     /// This is only intended to be called from the main thread
@@ -181,8 +180,8 @@ impl Handler {
     /// Since an `EventLoop` may be run more than once we need make sure to reset the
     /// `control_flow` state back to `Poll` each time the loop exits.
     ///
-    /// Note: that if the `NSApplication` has been launched then that state is preserved,
-    /// and we won't need to re-launch the app if subsequent EventLoops are run.
+    /// Note: that if the `NSApp` has been launched then that state is preserved, and we won't
+    /// need to re-launch the app if subsequent EventLoops are run.
     ///
     /// # Caveat
     /// This is only intended to be called from the main thread
@@ -210,6 +209,10 @@ impl Handler {
         self.exit.store(true, Ordering::Relaxed)
     }
 
+    pub fn clear_exit(&self) {
+        self.exit.store(false, Ordering::Relaxed)
+    }
+
     pub fn exiting(&self) -> bool {
         self.exit.load(Ordering::Relaxed)
     }
@@ -393,7 +396,7 @@ impl AppState {
     }
 
     // If `pump_events` is called to progress the event loop then we bootstrap the event
-    // loop via `-[NSAppplication run]` but will use `CFRunLoopRunInMode` for subsequent calls to
+    // loop via `[NSApp run]` but will use `CFRunLoopRunInMode` for subsequent calls to
     // `pump_events`
     pub fn request_stop_on_launch() {
         HANDLER.request_stop_app_on_launch();
@@ -435,6 +438,10 @@ impl AppState {
         HANDLER.exit()
     }
 
+    pub fn clear_exit() {
+        HANDLER.clear_exit()
+    }
+
     pub fn exiting() -> bool {
         HANDLER.exiting()
     }
@@ -460,15 +467,13 @@ impl AppState {
         create_default_menu: bool,
         activate_ignoring_other_apps: bool,
     ) {
-        let mtm = MainThreadMarker::new().unwrap();
-        let app = NSApplication::sharedApplication(mtm);
+        let app = NSApp();
         // We need to delay setting the activation policy and activating the app
         // until `applicationDidFinishLaunching` has been called. Otherwise the
         // menu bar is initially unresponsive on macOS 10.15.
         app.setActivationPolicy(activation_policy);
 
         window_activation_hack(&app);
-        #[allow(deprecated)]
         app.activateIgnoringOtherApps(activate_ignoring_other_apps);
 
         HANDLER.set_launched();
@@ -476,22 +481,21 @@ impl AppState {
         if create_default_menu {
             // The menubar initialization should be before the `NewEvents` event, to allow
             // overriding of the default menu even if it's created
-            menu::initialize(&app);
+            menu::initialize();
         }
 
         Self::start_running();
 
-        // If the application is being launched via `EventLoop::pump_events()` then we'll
+        // If the `NSApp` is being launched via `EventLoop::pump_events()` then we'll
         // want to stop the app once it is launched (and return to the external loop)
         //
         // In this case we still want to consider Winit's `EventLoop` to be "running",
         // so we call `start_running()` above.
         if HANDLER.should_stop_app_on_launch() {
             // Note: the original idea had been to only stop the underlying `RunLoop`
-            // for the app but that didn't work as expected (`-[NSApplication run]`
-            // effectively ignored the attempt to stop the RunLoop and re-started it).
-            //
-            // So we return from `pump_events` by stopping the application.
+            // for the app but that didn't work as expected (`[NSApp run]` effectively
+            // ignored the attempt to stop the RunLoop and re-started it.). So we
+            // return from `pump_events` by stopping the `NSApp`
             Self::stop();
         }
     }
@@ -593,12 +597,11 @@ impl AppState {
     }
 
     pub fn stop() {
-        let mtm = MainThreadMarker::new().unwrap();
-        let app = NSApplication::sharedApplication(mtm);
+        let app = NSApp();
         autoreleasepool(|_| {
             app.stop(None);
             // To stop event loop immediately, we need to post some event here.
-            app.postEvent_atStart(&dummy_event().unwrap(), true);
+            app.postEvent_atStart(&NSEvent::dummy(), true);
         });
     }
 

src/platform_impl/macos/appkit/appearance.rs

@@ -0,0 +1,28 @@
+use icrate::Foundation::{NSArray, NSObject, NSString};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSAppearance;
+
+    unsafe impl ClassType for NSAppearance {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+type NSAppearanceName = NSString;
+
+extern_methods!(
+    unsafe impl NSAppearance {
+        #[method_id(appearanceNamed:)]
+        pub fn appearanceNamed(name: &NSAppearanceName) -> Id<Self>;
+
+        #[method_id(bestMatchFromAppearancesWithNames:)]
+        pub fn bestMatchFromAppearancesWithNames(
+            &self,
+            appearances: &NSArray<NSAppearanceName>,
+        ) -> Id<NSAppearanceName>;
+    }
+);

src/platform_impl/macos/appkit/application.rs

@@ -0,0 +1,140 @@
+use icrate::Foundation::{MainThreadMarker, NSArray, NSInteger, NSObject, NSUInteger};
+use objc2::rc::Id;
+use objc2::runtime::AnyObject;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+use objc2::{Encode, Encoding};
+
+use super::{NSAppearance, NSEvent, NSMenu, NSResponder, NSWindow};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSApplication;
+
+    unsafe impl ClassType for NSApplication {
+        #[inherits(NSObject)]
+        type Super = NSResponder;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+pub(crate) fn NSApp() -> Id<NSApplication> {
+    // TODO: Only allow access from main thread
+    NSApplication::shared(unsafe { MainThreadMarker::new_unchecked() })
+}
+
+extern_methods!(
+    unsafe impl NSApplication {
+        /// This can only be called on the main thread since it may initialize
+        /// the application and since it's parameters may be changed by the main
+        /// thread at any time (hence it is only safe to access on the main thread).
+        pub fn shared(_mtm: MainThreadMarker) -> Id<Self> {
+            let app: Option<_> = unsafe { msg_send_id![Self::class(), sharedApplication] };
+            // SAFETY: `sharedApplication` always initializes the app if it isn't already
+            unsafe { app.unwrap_unchecked() }
+        }
+
+        #[method_id(currentEvent)]
+        pub fn currentEvent(&self) -> Option<Id<NSEvent>>;
+
+        #[method(postEvent:atStart:)]
+        pub fn postEvent_atStart(&self, event: &NSEvent, front_of_queue: bool);
+
+        #[method(presentationOptions)]
+        pub fn presentationOptions(&self) -> NSApplicationPresentationOptions;
+
+        #[method_id(windows)]
+        pub fn windows(&self) -> Id<NSArray<NSWindow>>;
+
+        #[method_id(keyWindow)]
+        pub fn keyWindow(&self) -> Option<Id<NSWindow>>;
+
+        // TODO: NSApplicationDelegate
+        #[method(setDelegate:)]
+        pub fn setDelegate(&self, delegate: &AnyObject);
+
+        #[method(setPresentationOptions:)]
+        pub fn setPresentationOptions(&self, options: NSApplicationPresentationOptions);
+
+        #[method(hide:)]
+        pub fn hide(&self, sender: Option<&AnyObject>);
+
+        #[method(orderFrontCharacterPalette:)]
+        #[allow(dead_code)]
+        pub fn orderFrontCharacterPalette(&self, sender: Option<&AnyObject>);
+
+        #[method(hideOtherApplications:)]
+        pub fn hideOtherApplications(&self, sender: Option<&AnyObject>);
+
+        #[method(stop:)]
+        pub fn stop(&self, sender: Option<&AnyObject>);
+
+        #[method(activateIgnoringOtherApps:)]
+        pub fn activateIgnoringOtherApps(&self, ignore: bool);
+
+        #[method(requestUserAttention:)]
+        pub fn requestUserAttention(&self, type_: NSRequestUserAttentionType) -> NSInteger;
+
+        #[method(setActivationPolicy:)]
+        pub fn setActivationPolicy(&self, policy: NSApplicationActivationPolicy) -> bool;
+
+        #[method(setMainMenu:)]
+        pub fn setMainMenu(&self, menu: &NSMenu);
+
+        #[method_id(effectiveAppearance)]
+        pub fn effectiveAppearance(&self) -> Id<NSAppearance>;
+
+        #[method(setAppearance:)]
+        pub fn setAppearance(&self, appearance: Option<&NSAppearance>);
+
+        #[method(run)]
+        pub unsafe fn run(&self);
+    }
+);
+
+#[allow(dead_code)]
+#[repr(isize)] // NSInteger
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSApplicationActivationPolicy {
+    NSApplicationActivationPolicyRegular = 0,
+    NSApplicationActivationPolicyAccessory = 1,
+    NSApplicationActivationPolicyProhibited = 2,
+    NSApplicationActivationPolicyERROR = -1,
+}
+
+unsafe impl Encode for NSApplicationActivationPolicy {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}
+
+bitflags! {
+    #[derive(Debug, Clone, Copy)]
+    pub struct NSApplicationPresentationOptions: NSUInteger {
+        const NSApplicationPresentationDefault = 0;
+        const NSApplicationPresentationAutoHideDock = 1 << 0;
+        const NSApplicationPresentationHideDock = 1 << 1;
+        const NSApplicationPresentationAutoHideMenuBar = 1 << 2;
+        const NSApplicationPresentationHideMenuBar = 1 << 3;
+        const NSApplicationPresentationDisableAppleMenu = 1 << 4;
+        const NSApplicationPresentationDisableProcessSwitching = 1 << 5;
+        const NSApplicationPresentationDisableForceQuit = 1 << 6;
+        const NSApplicationPresentationDisableSessionTermination = 1 << 7;
+        const NSApplicationPresentationDisableHideApplication = 1 << 8;
+        const NSApplicationPresentationDisableMenuBarTransparency = 1 << 9;
+        const NSApplicationPresentationFullScreen = 1 << 10;
+        const NSApplicationPresentationAutoHideToolbar = 1 << 11;
+    }
+}
+
+unsafe impl Encode for NSApplicationPresentationOptions {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}
+
+#[repr(usize)] // NSUInteger
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSRequestUserAttentionType {
+    NSCriticalRequest = 0,
+    NSInformationalRequest = 10,
+}
+
+unsafe impl Encode for NSRequestUserAttentionType {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}

src/platform_impl/macos/appkit/button.rs

@@ -0,0 +1,15 @@
+use icrate::Foundation::NSObject;
+use objc2::{extern_class, mutability, ClassType};
+
+use super::{NSControl, NSResponder, NSView};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSButton;
+
+    unsafe impl ClassType for NSButton {
+        #[inherits(NSView, NSResponder, NSObject)]
+        type Super = NSControl;
+        type Mutability = mutability::InteriorMutable;
+    }
+);

src/platform_impl/macos/appkit/color.rs

@@ -0,0 +1,28 @@
+use icrate::Foundation::NSObject;
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+extern_class!(
+    /// An object that stores color data and sometimes opacity (alpha value).
+    ///
+    /// <https://developer.apple.com/documentation/appkit/nscolor?language=objc>
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSColor;
+
+    unsafe impl ClassType for NSColor {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+// SAFETY: Documentation clearly states:
+// > Color objects are immutable and thread-safe
+unsafe impl Send for NSColor {}
+unsafe impl Sync for NSColor {}
+
+extern_methods!(
+    unsafe impl NSColor {
+        #[method_id(clearColor)]
+        pub fn clear() -> Id<Self>;
+    }
+);

src/platform_impl/macos/appkit/control.rs

@@ -0,0 +1,25 @@
+use icrate::Foundation::NSObject;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+use super::{NSResponder, NSView};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSControl;
+
+    unsafe impl ClassType for NSControl {
+        #[inherits(NSResponder, NSObject)]
+        type Super = NSView;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl NSControl {
+        #[method(setEnabled:)]
+        pub fn setEnabled(&self, enabled: bool);
+
+        #[method(isEnabled)]
+        pub fn isEnabled(&self) -> bool;
+    }
+);

src/platform_impl/macos/appkit/cursor.rs

@@ -0,0 +1,241 @@
+use once_cell::sync::Lazy;
+
+use icrate::ns_string;
+use icrate::Foundation::{
+    NSData, NSDictionary, NSNumber, NSObject, NSObjectProtocol, NSPoint, NSString,
+};
+use objc2::rc::{DefaultId, Id};
+use objc2::runtime::Sel;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, sel, ClassType};
+
+use super::NSImage;
+use crate::window::CursorIcon;
+
+extern_class!(
+    /// <https://developer.apple.com/documentation/appkit/nscursor?language=objc>
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSCursor;
+
+    unsafe impl ClassType for NSCursor {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+// SAFETY: NSCursor is immutable, stated here:
+// https://developer.apple.com/documentation/appkit/nscursor/1527062-image?language=objc
+unsafe impl Send for NSCursor {}
+unsafe impl Sync for NSCursor {}
+
+macro_rules! def_cursor {
+    {$(
+        $(#[$($m:meta)*])*
+        pub fn $name:ident();
+    )*} => {$(
+        $(#[$($m)*])*
+        pub fn $name() -> Id<Self> {
+            unsafe { msg_send_id![Self::class(), $name] }
+        }
+    )*};
+}
+
+macro_rules! def_undocumented_cursor {
+    {$(
+        $(#[$($m:meta)*])*
+        pub fn $name:ident();
+    )*} => {$(
+        $(#[$($m)*])*
+        pub fn $name() -> Id<Self> {
+            unsafe { Self::from_selector(sel!($name)).unwrap_or_else(|| Default::default()) }
+        }
+    )*};
+}
+
+extern_methods!(
+    /// Documented cursors
+    unsafe impl NSCursor {
+        def_cursor!(
+            pub fn arrowCursor();
+            pub fn pointingHandCursor();
+            pub fn openHandCursor();
+            pub fn closedHandCursor();
+            pub fn IBeamCursor();
+            pub fn IBeamCursorForVerticalLayout();
+            pub fn dragCopyCursor();
+            pub fn dragLinkCursor();
+            pub fn operationNotAllowedCursor();
+            pub fn contextualMenuCursor();
+            pub fn crosshairCursor();
+            pub fn resizeRightCursor();
+            pub fn resizeUpCursor();
+            pub fn resizeLeftCursor();
+            pub fn resizeDownCursor();
+            pub fn resizeLeftRightCursor();
+            pub fn resizeUpDownCursor();
+        );
+
+        // Creating cursors should be thread-safe, though using them for anything probably isn't.
+        pub fn new(image: &NSImage, hotSpot: NSPoint) -> Id<Self> {
+            unsafe { msg_send_id![Self::alloc(), initWithImage: image, hotSpot: hotSpot] }
+        }
+
+        pub fn invisible() -> Id<Self> {
+            // 16x16 GIF data for invisible cursor
+            // You can reproduce this via ImageMagick.
+            // $ convert -size 16x16 xc:none cursor.gif
+            static CURSOR_BYTES: &[u8] = &[
+                0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x10, 0x00, 0x10, 0x00, 0xF0, 0x00, 0x00, 0x00,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0xF9, 0x04, 0x01, 0x00, 0x00, 0x00, 0x00, 0x2C,
+                0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x10, 0x00, 0x00, 0x02, 0x0E, 0x84, 0x8F, 0xA9,
+                0xCB, 0xED, 0x0F, 0xA3, 0x9C, 0xB4, 0xDA, 0x8B, 0xB3, 0x3E, 0x05, 0x00, 0x3B,
+            ];
+
+            static CURSOR: Lazy<Id<NSCursor>> = Lazy::new(|| {
+                // TODO: Consider using `dataWithBytesNoCopy:`
+                let data = NSData::with_bytes(CURSOR_BYTES);
+                let image = NSImage::new_with_data(&data);
+                NSCursor::new(&image, NSPoint::new(0.0, 0.0))
+            });
+
+            CURSOR.clone()
+        }
+    }
+
+    /// Undocumented cursors
+    unsafe impl NSCursor {
+        #[method(respondsToSelector:)]
+        fn class_responds_to(sel: Sel) -> bool;
+
+        #[method_id(performSelector:)]
+        unsafe fn from_selector_unchecked(sel: Sel) -> Id<Self>;
+
+        unsafe fn from_selector(sel: Sel) -> Option<Id<Self>> {
+            if Self::class_responds_to(sel) {
+                Some(unsafe { Self::from_selector_unchecked(sel) })
+            } else {
+                warn!("Cursor `{:?}` appears to be invalid", sel);
+                None
+            }
+        }
+
+        def_undocumented_cursor!(
+            // Undocumented cursors: https://stackoverflow.com/a/46635398/5435443
+            pub fn _helpCursor();
+            pub fn _zoomInCursor();
+            pub fn _zoomOutCursor();
+            pub fn _windowResizeNorthEastCursor();
+            pub fn _windowResizeNorthWestCursor();
+            pub fn _windowResizeSouthEastCursor();
+            pub fn _windowResizeSouthWestCursor();
+            pub fn _windowResizeNorthEastSouthWestCursor();
+            pub fn _windowResizeNorthWestSouthEastCursor();
+
+            // While these two are available, the former just loads a white arrow,
+            // and the latter loads an ugly deflated beachball!
+            // pub fn _moveCursor();
+            // pub fn _waitCursor();
+
+            // An even more undocumented cursor...
+            // https://bugs.eclipse.org/bugs/show_bug.cgi?id=522349
+            pub fn busyButClickableCursor();
+        );
+    }
+
+    /// Webkit cursors
+    unsafe impl NSCursor {
+        // Note that loading `busybutclickable` with this code won't animate
+        // the frames; instead you'll just get them all in a column.
+        unsafe fn load_webkit_cursor(name: &NSString) -> Id<Self> {
+            // Snatch a cursor from WebKit; They fit the style of the native
+            // cursors, and will seem completely standard to macOS users.
+            //
+            // https://stackoverflow.com/a/21786835/5435443
+            let root = ns_string!("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/HIServices.framework/Versions/A/Resources/cursors");
+            let cursor_path = root.stringByAppendingPathComponent(name);
+
+            let pdf_path = cursor_path.stringByAppendingPathComponent(ns_string!("cursor.pdf"));
+            let image = NSImage::new_by_referencing_file(&pdf_path);
+
+            // TODO: Handle PLists better
+            let info_path = cursor_path.stringByAppendingPathComponent(ns_string!("info.plist"));
+            let info: Id<NSDictionary<NSObject, NSObject>> = unsafe {
+                msg_send_id![
+                    <NSDictionary<NSObject, NSObject>>::class(),
+                    dictionaryWithContentsOfFile: &*info_path,
+                ]
+            };
+            let mut x = 0.0;
+            if let Some(n) = info.get(&*ns_string!("hotx")) {
+                if n.is_kind_of::<NSNumber>() {
+                    let ptr: *const NSObject = n;
+                    let ptr: *const NSNumber = ptr.cast();
+                    x = unsafe { &*ptr }.as_cgfloat()
+                }
+            }
+            let mut y = 0.0;
+            if let Some(n) = info.get(&*ns_string!("hotx")) {
+                if n.is_kind_of::<NSNumber>() {
+                    let ptr: *const NSObject = n;
+                    let ptr: *const NSNumber = ptr.cast();
+                    y = unsafe { &*ptr }.as_cgfloat()
+                }
+            }
+
+            let hotspot = NSPoint::new(x, y);
+            Self::new(&image, hotspot)
+        }
+
+        pub fn moveCursor() -> Id<Self> {
+            unsafe { Self::load_webkit_cursor(ns_string!("move")) }
+        }
+
+        pub fn cellCursor() -> Id<Self> {
+            unsafe { Self::load_webkit_cursor(ns_string!("cell")) }
+        }
+    }
+);
+
+impl NSCursor {
+    pub fn from_icon(icon: CursorIcon) -> Id<Self> {
+        match icon {
+            CursorIcon::Default => Default::default(),
+            CursorIcon::Pointer => Self::pointingHandCursor(),
+            CursorIcon::Grab => Self::openHandCursor(),
+            CursorIcon::Grabbing => Self::closedHandCursor(),
+            CursorIcon::Text => Self::IBeamCursor(),
+            CursorIcon::VerticalText => Self::IBeamCursorForVerticalLayout(),
+            CursorIcon::Copy => Self::dragCopyCursor(),
+            CursorIcon::Alias => Self::dragLinkCursor(),
+            CursorIcon::NotAllowed | CursorIcon::NoDrop => Self::operationNotAllowedCursor(),
+            CursorIcon::ContextMenu => Self::contextualMenuCursor(),
+            CursorIcon::Crosshair => Self::crosshairCursor(),
+            CursorIcon::EResize => Self::resizeRightCursor(),
+            CursorIcon::NResize => Self::resizeUpCursor(),
+            CursorIcon::WResize => Self::resizeLeftCursor(),
+            CursorIcon::SResize => Self::resizeDownCursor(),
+            CursorIcon::EwResize | CursorIcon::ColResize => Self::resizeLeftRightCursor(),
+            CursorIcon::NsResize | CursorIcon::RowResize => Self::resizeUpDownCursor(),
+            CursorIcon::Help => Self::_helpCursor(),
+            CursorIcon::ZoomIn => Self::_zoomInCursor(),
+            CursorIcon::ZoomOut => Self::_zoomOutCursor(),
+            CursorIcon::NeResize => Self::_windowResizeNorthEastCursor(),
+            CursorIcon::NwResize => Self::_windowResizeNorthWestCursor(),
+            CursorIcon::SeResize => Self::_windowResizeSouthEastCursor(),
+            CursorIcon::SwResize => Self::_windowResizeSouthWestCursor(),
+            CursorIcon::NeswResize => Self::_windowResizeNorthEastSouthWestCursor(),
+            CursorIcon::NwseResize => Self::_windowResizeNorthWestSouthEastCursor(),
+            // This is the wrong semantics for `Wait`, but it's the same as
+            // what's used in Safari and Chrome.
+            CursorIcon::Wait | CursorIcon::Progress => Self::busyButClickableCursor(),
+            CursorIcon::Move | CursorIcon::AllScroll => Self::moveCursor(),
+            CursorIcon::Cell => Self::cellCursor(),
+            _ => Default::default(),
+        }
+    }
+}
+
+impl DefaultId for NSCursor {
+    fn default_id() -> Id<Self> {
+        Self::arrowCursor()
+    }
+}

src/platform_impl/macos/appkit/event.rs

@@ -0,0 +1,308 @@
+use std::os::raw::c_ushort;
+
+use icrate::Foundation::{
+    CGFloat, NSCopying, NSInteger, NSObject, NSPoint, NSString, NSTimeInterval, NSUInteger,
+};
+use objc2::encode::{Encode, Encoding};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSEvent;
+
+    unsafe impl ClassType for NSEvent {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+// > Safely handled only on the same thread, whether that be the main thread
+// > or a secondary thread; otherwise you run the risk of having events get
+// > out of sequence.
+// <https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/CocoaFundamentals/AddingBehaviortoaCocoaProgram/AddingBehaviorCocoa.html#//apple_ref/doc/uid/TP40002974-CH5-SW47>
+// <https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/ThreadSafetySummary.html#//apple_ref/doc/uid/10000057i-CH12-123383>
+
+extern_methods!(
+    unsafe impl NSEvent {
+        #[method_id(
+            otherEventWithType:
+            location:
+            modifierFlags:
+            timestamp:
+            windowNumber:
+            context:
+            subtype:
+            data1:
+            data2:
+        )]
+        unsafe fn otherEventWithType(
+            type_: NSEventType,
+            location: NSPoint,
+            flags: NSEventModifierFlags,
+            time: NSTimeInterval,
+            window_num: NSInteger,
+            context: Option<&NSObject>, // NSGraphicsContext
+            subtype: NSEventSubtype,
+            data1: NSInteger,
+            data2: NSInteger,
+        ) -> Id<Self>;
+
+        pub fn dummy() -> Id<Self> {
+            unsafe {
+                Self::otherEventWithType(
+                    NSEventType::NSApplicationDefined,
+                    NSPoint::new(0.0, 0.0),
+                    NSEventModifierFlags::empty(),
+                    0.0,
+                    0,
+                    None,
+                    NSEventSubtype::NSWindowExposedEventType,
+                    0,
+                    0,
+                )
+            }
+        }
+
+        #[method_id(
+            keyEventWithType:
+            location:
+            modifierFlags:
+            timestamp:
+            windowNumber:
+            context:
+            characters:
+            charactersIgnoringModifiers:
+            isARepeat:
+            keyCode:
+        )]
+        pub fn keyEventWithType(
+            type_: NSEventType,
+            location: NSPoint,
+            modifier_flags: NSEventModifierFlags,
+            timestamp: NSTimeInterval,
+            window_num: NSInteger,
+            context: Option<&NSObject>,
+            characters: &NSString,
+            characters_ignoring_modifiers: &NSString,
+            is_a_repeat: bool,
+            scancode: c_ushort,
+        ) -> Id<Self>;
+
+        #[method(locationInWindow)]
+        pub fn locationInWindow(&self) -> NSPoint;
+
+        // TODO: MainThreadMarker
+        #[method(pressedMouseButtons)]
+        pub fn pressedMouseButtons() -> NSUInteger;
+
+        #[method(modifierFlags)]
+        pub fn modifierFlags(&self) -> NSEventModifierFlags;
+
+        #[method(type)]
+        pub fn type_(&self) -> NSEventType;
+
+        #[method(keyCode)]
+        pub fn key_code(&self) -> c_ushort;
+
+        #[method(magnification)]
+        pub fn magnification(&self) -> CGFloat;
+
+        #[method(phase)]
+        pub fn phase(&self) -> NSEventPhase;
+
+        #[method(momentumPhase)]
+        pub fn momentumPhase(&self) -> NSEventPhase;
+
+        #[method(deltaX)]
+        pub fn deltaX(&self) -> CGFloat;
+
+        #[method(deltaY)]
+        pub fn deltaY(&self) -> CGFloat;
+
+        #[method(buttonNumber)]
+        pub fn buttonNumber(&self) -> NSInteger;
+
+        #[method(scrollingDeltaX)]
+        pub fn scrollingDeltaX(&self) -> CGFloat;
+
+        #[method(scrollingDeltaY)]
+        pub fn scrollingDeltaY(&self) -> CGFloat;
+
+        #[method(hasPreciseScrollingDeltas)]
+        pub fn hasPreciseScrollingDeltas(&self) -> bool;
+
+        #[method(rotation)]
+        pub fn rotation(&self) -> f32;
+
+        #[method(pressure)]
+        pub fn pressure(&self) -> f32;
+
+        #[method(stage)]
+        pub fn stage(&self) -> NSInteger;
+
+        #[method(isARepeat)]
+        pub fn is_a_repeat(&self) -> bool;
+
+        #[method(windowNumber)]
+        pub fn window_number(&self) -> NSInteger;
+
+        #[method(timestamp)]
+        pub fn timestamp(&self) -> NSTimeInterval;
+
+        #[method_id(characters)]
+        pub fn characters(&self) -> Option<Id<NSString>>;
+
+        #[method_id(charactersIgnoringModifiers)]
+        pub fn charactersIgnoringModifiers(&self) -> Option<Id<NSString>>;
+
+        pub fn lshift_pressed(&self) -> bool {
+            let raw_modifiers = self.modifierFlags().bits() as u32;
+            raw_modifiers & NX_DEVICELSHIFTKEYMASK != 0
+        }
+
+        pub fn rshift_pressed(&self) -> bool {
+            let raw_modifiers = self.modifierFlags().bits() as u32;
+            raw_modifiers & NX_DEVICERSHIFTKEYMASK != 0
+        }
+
+        pub fn lctrl_pressed(&self) -> bool {
+            let raw_modifiers = self.modifierFlags().bits() as u32;
+            raw_modifiers & NX_DEVICELCTLKEYMASK != 0
+        }
+
+        pub fn rctrl_pressed(&self) -> bool {
+            let raw_modifiers = self.modifierFlags().bits() as u32;
+            raw_modifiers & NX_DEVICERCTLKEYMASK != 0
+        }
+
+        pub fn lalt_pressed(&self) -> bool {
+            let raw_modifiers = self.modifierFlags().bits() as u32;
+            raw_modifiers & NX_DEVICELALTKEYMASK != 0
+        }
+
+        pub fn ralt_pressed(&self) -> bool {
+            let raw_modifiers = self.modifierFlags().bits() as u32;
+            raw_modifiers & NX_DEVICERALTKEYMASK != 0
+        }
+
+        pub fn lcmd_pressed(&self) -> bool {
+            let raw_modifiers = self.modifierFlags().bits() as u32;
+            raw_modifiers & NX_DEVICELCMDKEYMASK != 0
+        }
+
+        pub fn rcmd_pressed(&self) -> bool {
+            let raw_modifiers = self.modifierFlags().bits() as u32;
+            raw_modifiers & NX_DEVICERCMDKEYMASK != 0
+        }
+    }
+);
+
+unsafe impl NSCopying for NSEvent {}
+
+// The values are from the https://github.com/apple-oss-distributions/IOHIDFamily/blob/19666c840a6d896468416ff0007040a10b7b46b8/IOHIDSystem/IOKit/hidsystem/IOLLEvent.h#L258-L259
+const NX_DEVICELCTLKEYMASK: u32 = 0x00000001;
+const NX_DEVICELSHIFTKEYMASK: u32 = 0x00000002;
+const NX_DEVICERSHIFTKEYMASK: u32 = 0x00000004;
+const NX_DEVICELCMDKEYMASK: u32 = 0x00000008;
+const NX_DEVICERCMDKEYMASK: u32 = 0x00000010;
+const NX_DEVICELALTKEYMASK: u32 = 0x00000020;
+const NX_DEVICERALTKEYMASK: u32 = 0x00000040;
+const NX_DEVICERCTLKEYMASK: u32 = 0x00002000;
+
+bitflags! {
+    #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+    pub struct NSEventModifierFlags: NSUInteger {
+        const NSAlphaShiftKeyMask                     = 1 << 16;
+        const NSShiftKeyMask                          = 1 << 17;
+        const NSControlKeyMask                        = 1 << 18;
+        const NSAlternateKeyMask                      = 1 << 19;
+        const NSCommandKeyMask                        = 1 << 20;
+        const NSNumericPadKeyMask                     = 1 << 21;
+        const NSHelpKeyMask                           = 1 << 22;
+        const NSFunctionKeyMask                       = 1 << 23;
+        const NSDeviceIndependentModifierFlagsMask    = 0xffff0000;
+    }
+}
+
+unsafe impl Encode for NSEventModifierFlags {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}
+
+bitflags! {
+    #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+    pub struct NSEventPhase: NSUInteger {
+       const NSEventPhaseNone        = 0;
+       const NSEventPhaseBegan       = 0x1 << 0;
+       const NSEventPhaseStationary  = 0x1 << 1;
+       const NSEventPhaseChanged     = 0x1 << 2;
+       const NSEventPhaseEnded       = 0x1 << 3;
+       const NSEventPhaseCancelled   = 0x1 << 4;
+       const NSEventPhaseMayBegin    = 0x1 << 5;
+    }
+}
+
+unsafe impl Encode for NSEventPhase {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}
+
+#[allow(dead_code)]
+#[repr(i16)] // short
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSEventSubtype {
+    // TODO: Not sure what these values are
+    // NSMouseEventSubtype           = NX_SUBTYPE_DEFAULT,
+    // NSTabletPointEventSubtype     = NX_SUBTYPE_TABLET_POINT,
+    // NSTabletProximityEventSubtype = NX_SUBTYPE_TABLET_PROXIMITY
+    // NSTouchEventSubtype           = NX_SUBTYPE_MOUSE_TOUCH,
+    NSWindowExposedEventType = 0,
+    NSApplicationActivatedEventType = 1,
+    NSApplicationDeactivatedEventType = 2,
+    NSWindowMovedEventType = 4,
+    NSScreenChangedEventType = 8,
+    NSAWTEventType = 16,
+}
+
+unsafe impl Encode for NSEventSubtype {
+    const ENCODING: Encoding = i16::ENCODING;
+}
+
+#[allow(dead_code)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+#[repr(usize)] // NSUInteger
+pub enum NSEventType {
+    NSLeftMouseDown = 1,
+    NSLeftMouseUp = 2,
+    NSRightMouseDown = 3,
+    NSRightMouseUp = 4,
+    NSMouseMoved = 5,
+    NSLeftMouseDragged = 6,
+    NSRightMouseDragged = 7,
+    NSMouseEntered = 8,
+    NSMouseExited = 9,
+    NSKeyDown = 10,
+    NSKeyUp = 11,
+    NSFlagsChanged = 12,
+    NSAppKitDefined = 13,
+    NSSystemDefined = 14,
+    NSApplicationDefined = 15,
+    NSPeriodic = 16,
+    NSCursorUpdate = 17,
+    NSScrollWheel = 22,
+    NSTabletPoint = 23,
+    NSTabletProximity = 24,
+    NSOtherMouseDown = 25,
+    NSOtherMouseUp = 26,
+    NSOtherMouseDragged = 27,
+    NSEventTypeGesture = 29,
+    NSEventTypeMagnify = 30,
+    NSEventTypeSwipe = 31,
+    NSEventTypeRotate = 18,
+    NSEventTypeBeginGesture = 19,
+    NSEventTypeEndGesture = 20,
+    NSEventTypePressure = 34,
+}
+
+unsafe impl Encode for NSEventType {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}

src/platform_impl/macos/appkit/image.rs

@@ -0,0 +1,36 @@
+use icrate::Foundation::{NSData, NSObject, NSString};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+
+extern_class!(
+    // TODO: Can this be mutable?
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSImage;
+
+    unsafe impl ClassType for NSImage {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+// Documented Thread-Unsafe, but:
+// > One thread can create an NSImage object, draw to the image buffer,
+// > and pass it off to the main thread for drawing. The underlying image
+// > cache is shared among all threads.
+// <https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/ThreadSafetySummary.html#//apple_ref/doc/uid/10000057i-CH12-126728>
+//
+// So really only unsafe to mutate on several threads.
+unsafe impl Send for NSImage {}
+unsafe impl Sync for NSImage {}
+
+extern_methods!(
+    unsafe impl NSImage {
+        pub fn new_by_referencing_file(path: &NSString) -> Id<Self> {
+            unsafe { msg_send_id![Self::alloc(), initByReferencingFile: path] }
+        }
+
+        pub fn new_with_data(data: &NSData) -> Id<Self> {
+            unsafe { msg_send_id![Self::alloc(), initWithData: data] }
+        }
+    }
+);

src/platform_impl/macos/appkit/menu.rs

@@ -0,0 +1,25 @@
+use icrate::Foundation::NSObject;
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+use super::NSMenuItem;
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSMenu;
+
+    unsafe impl ClassType for NSMenu {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl NSMenu {
+        #[method_id(new)]
+        pub fn new() -> Id<Self>;
+
+        #[method(addItem:)]
+        pub fn addItem(&self, item: &NSMenuItem);
+    }
+);

src/platform_impl/macos/appkit/menu_item.rs

@@ -0,0 +1,43 @@
+use icrate::Foundation::{NSObject, NSString};
+use objc2::rc::Id;
+use objc2::runtime::Sel;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+
+use super::{NSEventModifierFlags, NSMenu};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSMenuItem;
+
+    unsafe impl ClassType for NSMenuItem {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl NSMenuItem {
+        #[method_id(new)]
+        pub fn new() -> Id<Self>;
+
+        pub fn newWithTitle(title: &NSString, action: Sel, key_equivalent: &NSString) -> Id<Self> {
+            unsafe {
+                msg_send_id![
+                    Self::alloc(),
+                    initWithTitle: title,
+                    action: action,
+                    keyEquivalent: key_equivalent,
+                ]
+            }
+        }
+
+        #[method_id(separatorItem)]
+        pub fn separatorItem() -> Id<Self>;
+
+        #[method(setKeyEquivalentModifierMask:)]
+        pub fn setKeyEquivalentModifierMask(&self, mask: NSEventModifierFlags);
+
+        #[method(setSubmenu:)]
+        pub fn setSubmenu(&self, submenu: &NSMenu);
+    }
+);

src/platform_impl/macos/appkit/mod.rs

@@ -0,0 +1,66 @@
+//! Safe bindings for the AppKit framework.
+//!
+//! These are split out from the rest of `winit` to make safety easier to review.
+//! In the future, these should probably live in another crate like `cacao`.
+//!
+//! TODO: Main thread safety.
+// Objective-C methods have different conventions, and it's much easier to
+// understand if we just use the same names
+#![allow(non_snake_case)]
+#![allow(clippy::too_many_arguments)]
+#![allow(clippy::enum_variant_names)]
+#![allow(non_upper_case_globals)]
+
+mod appearance;
+mod application;
+mod button;
+mod color;
+mod control;
+mod cursor;
+mod event;
+mod image;
+mod menu;
+mod menu_item;
+mod pasteboard;
+mod responder;
+mod screen;
+mod tab_group;
+mod text_input_client;
+mod text_input_context;
+mod version;
+mod view;
+mod window;
+
+pub(crate) use self::appearance::NSAppearance;
+pub(crate) use self::application::{
+    NSApp, NSApplication, NSApplicationActivationPolicy, NSApplicationPresentationOptions,
+    NSRequestUserAttentionType,
+};
+pub(crate) use self::button::NSButton;
+pub(crate) use self::color::NSColor;
+pub(crate) use self::control::NSControl;
+pub(crate) use self::cursor::NSCursor;
+#[allow(unused_imports)]
+pub(crate) use self::event::{
+    NSEvent, NSEventModifierFlags, NSEventPhase, NSEventSubtype, NSEventType,
+};
+pub(crate) use self::image::NSImage;
+pub(crate) use self::menu::NSMenu;
+pub(crate) use self::menu_item::NSMenuItem;
+pub(crate) use self::pasteboard::{NSFilenamesPboardType, NSPasteboard, NSPasteboardType};
+pub(crate) use self::responder::NSResponder;
+#[allow(unused_imports)]
+pub(crate) use self::screen::{NSDeviceDescriptionKey, NSScreen};
+pub(crate) use self::tab_group::NSWindowTabGroup;
+pub(crate) use self::text_input_client::NSTextInputClient;
+pub(crate) use self::text_input_context::NSTextInputContext;
+pub(crate) use self::version::NSAppKitVersion;
+pub(crate) use self::view::{NSTrackingRectTag, NSView};
+pub(crate) use self::window::{
+    NSBackingStoreType, NSWindow, NSWindowButton, NSWindowLevel, NSWindowOcclusionState,
+    NSWindowOrderingMode, NSWindowSharingType, NSWindowStyleMask, NSWindowTabbingMode,
+    NSWindowTitleVisibility,
+};
+
+#[link(name = "AppKit", kind = "framework")]
+extern "C" {}

src/platform_impl/macos/appkit/pasteboard.rs

@@ -0,0 +1,26 @@
+use icrate::Foundation::{NSObject, NSString};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSPasteboard;
+
+    unsafe impl ClassType for NSPasteboard {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl NSPasteboard {
+        #[method_id(propertyListForType:)]
+        pub fn propertyListForType(&self, type_: &NSPasteboardType) -> Id<NSObject>;
+    }
+);
+
+pub type NSPasteboardType = NSString;
+
+extern "C" {
+    pub static NSFilenamesPboardType: &'static NSPasteboardType;
+}

src/platform_impl/macos/appkit/responder.rs

@@ -0,0 +1,23 @@
+use icrate::Foundation::{NSArray, NSObject};
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+use super::NSEvent;
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub struct NSResponder;
+
+    unsafe impl ClassType for NSResponder {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+// Documented as "Thread-Unsafe".
+
+extern_methods!(
+    unsafe impl NSResponder {
+        #[method(interpretKeyEvents:)]
+        pub(crate) unsafe fn interpretKeyEvents(&self, events: &NSArray<NSEvent>);
+    }
+);

src/platform_impl/macos/appkit/screen.rs

@@ -0,0 +1,65 @@
+use icrate::ns_string;
+use icrate::Foundation::{CGFloat, NSArray, NSDictionary, NSNumber, NSObject, NSRect, NSString};
+use objc2::rc::Id;
+use objc2::runtime::AnyObject;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSScreen;
+
+    unsafe impl ClassType for NSScreen {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+// TODO: Main thread marker!
+
+extern_methods!(
+    unsafe impl NSScreen {
+        /// The application object must have been created.
+        #[method_id(mainScreen)]
+        pub fn main() -> Option<Id<Self>>;
+
+        /// The application object must have been created.
+        #[method_id(screens)]
+        pub fn screens() -> Id<NSArray<Self>>;
+
+        #[method(frame)]
+        pub fn frame(&self) -> NSRect;
+
+        #[method(visibleFrame)]
+        pub fn visibleFrame(&self) -> NSRect;
+
+        #[method_id(deviceDescription)]
+        pub fn deviceDescription(&self) -> Id<NSDictionary<NSDeviceDescriptionKey, AnyObject>>;
+
+        pub fn display_id(&self) -> u32 {
+            let key = ns_string!("NSScreenNumber");
+
+            objc2::rc::autoreleasepool(|_| {
+                let device_description = self.deviceDescription();
+
+                // Retrieve the CGDirectDisplayID associated with this screen
+                //
+                // SAFETY: The value from @"NSScreenNumber" in deviceDescription is guaranteed
+                // to be an NSNumber. See documentation for `deviceDescription` for details:
+                // <https://developer.apple.com/documentation/appkit/nsscreen/1388360-devicedescription?language=objc>
+                let obj = device_description
+                    .get(key)
+                    .expect("failed getting screen display id from device description");
+                let obj: *const AnyObject = obj;
+                let obj: *const NSNumber = obj.cast();
+                let obj: &NSNumber = unsafe { &*obj };
+
+                obj.as_u32()
+            })
+        }
+
+        #[method(backingScaleFactor)]
+        pub fn backingScaleFactor(&self) -> CGFloat;
+    }
+);
+
+pub type NSDeviceDescriptionKey = NSString;

src/platform_impl/macos/appkit/tab_group.rs

@@ -0,0 +1,31 @@
+use icrate::Foundation::{NSArray, NSObject};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+use super::NSWindow;
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSWindowTabGroup;
+
+    unsafe impl ClassType for NSWindowTabGroup {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl NSWindowTabGroup {
+        #[method(selectNextTab)]
+        pub fn selectNextTab(&self);
+
+        #[method(selectPreviousTab)]
+        pub fn selectPreviousTab(&self);
+
+        #[method_id(windows)]
+        pub fn tabbedWindows(&self) -> Option<Id<NSArray<NSWindow>>>;
+
+        #[method(setSelectedWindow:)]
+        pub fn setSelectedWindow(&self, window: &NSWindow);
+    }
+);

src/platform_impl/macos/appkit/text_input_client.rs

@@ -0,0 +1,9 @@
+use objc2::{extern_protocol, ProtocolType};
+
+extern_protocol!(
+    pub(crate) unsafe trait NSTextInputClient {
+        // TODO: Methods
+    }
+
+    unsafe impl ProtocolType for dyn NSTextInputClient {}
+);

src/platform_impl/macos/appkit/text_input_context.rs

@@ -0,0 +1,29 @@
+use icrate::Foundation::{NSObject, NSString};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+type NSTextInputSourceIdentifier = NSString;
+
+extern_class!(
+    /// Main-Thread-Only!
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSTextInputContext;
+
+    unsafe impl ClassType for NSTextInputContext {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl NSTextInputContext {
+        #[method(invalidateCharacterCoordinates)]
+        pub fn invalidateCharacterCoordinates(&self);
+
+        #[method(discardMarkedText)]
+        pub fn discardMarkedText(&self);
+
+        #[method_id(selectedKeyboardInputSource)]
+        pub fn selectedKeyboardInputSource(&self) -> Option<Id<NSTextInputSourceIdentifier>>;
+    }
+);

src/platform_impl/macos/appkit/version.rs

@@ -0,0 +1,62 @@
+#[repr(transparent)]
+#[derive(PartialEq, PartialOrd, Debug, Clone, Copy)]
+pub struct NSAppKitVersion(f64);
+
+#[allow(dead_code)]
+#[allow(non_upper_case_globals)]
+impl NSAppKitVersion {
+    pub fn current() -> Self {
+        extern "C" {
+            static NSAppKitVersionNumber: NSAppKitVersion;
+        }
+
+        unsafe { NSAppKitVersionNumber }
+    }
+
+    pub fn floor(self) -> Self {
+        Self(self.0.floor())
+    }
+
+    pub const NSAppKitVersionNumber10_0: Self = Self(577.0);
+    pub const NSAppKitVersionNumber10_1: Self = Self(620.0);
+    pub const NSAppKitVersionNumber10_2: Self = Self(663.0);
+    pub const NSAppKitVersionNumber10_2_3: Self = Self(663.6);
+    pub const NSAppKitVersionNumber10_3: Self = Self(743.0);
+    pub const NSAppKitVersionNumber10_3_2: Self = Self(743.14);
+    pub const NSAppKitVersionNumber10_3_3: Self = Self(743.2);
+    pub const NSAppKitVersionNumber10_3_5: Self = Self(743.24);
+    pub const NSAppKitVersionNumber10_3_7: Self = Self(743.33);
+    pub const NSAppKitVersionNumber10_3_9: Self = Self(743.36);
+    pub const NSAppKitVersionNumber10_4: Self = Self(824.0);
+    pub const NSAppKitVersionNumber10_4_1: Self = Self(824.1);
+    pub const NSAppKitVersionNumber10_4_3: Self = Self(824.23);
+    pub const NSAppKitVersionNumber10_4_4: Self = Self(824.33);
+    pub const NSAppKitVersionNumber10_4_7: Self = Self(824.41);
+    pub const NSAppKitVersionNumber10_5: Self = Self(949.0);
+    pub const NSAppKitVersionNumber10_5_2: Self = Self(949.27);
+    pub const NSAppKitVersionNumber10_5_3: Self = Self(949.33);
+    pub const NSAppKitVersionNumber10_6: Self = Self(1038.0);
+    pub const NSAppKitVersionNumber10_7: Self = Self(1138.0);
+    pub const NSAppKitVersionNumber10_7_2: Self = Self(1138.23);
+    pub const NSAppKitVersionNumber10_7_3: Self = Self(1138.32);
+    pub const NSAppKitVersionNumber10_7_4: Self = Self(1138.47);
+    pub const NSAppKitVersionNumber10_8: Self = Self(1187.0);
+    pub const NSAppKitVersionNumber10_9: Self = Self(1265.0);
+    pub const NSAppKitVersionNumber10_10: Self = Self(1343.0);
+    pub const NSAppKitVersionNumber10_10_2: Self = Self(1344.0);
+    pub const NSAppKitVersionNumber10_10_3: Self = Self(1347.0);
+    pub const NSAppKitVersionNumber10_10_4: Self = Self(1348.0);
+    pub const NSAppKitVersionNumber10_10_5: Self = Self(1348.0);
+    pub const NSAppKitVersionNumber10_10_Max: Self = Self(1349.0);
+    pub const NSAppKitVersionNumber10_11: Self = Self(1404.0);
+    pub const NSAppKitVersionNumber10_11_1: Self = Self(1404.13);
+    pub const NSAppKitVersionNumber10_11_2: Self = Self(1404.34);
+    pub const NSAppKitVersionNumber10_11_3: Self = Self(1404.34);
+    pub const NSAppKitVersionNumber10_12: Self = Self(1504.0);
+    pub const NSAppKitVersionNumber10_12_1: Self = Self(1504.60);
+    pub const NSAppKitVersionNumber10_12_2: Self = Self(1504.76);
+    pub const NSAppKitVersionNumber10_13: Self = Self(1561.0);
+    pub const NSAppKitVersionNumber10_13_1: Self = Self(1561.1);
+    pub const NSAppKitVersionNumber10_13_2: Self = Self(1561.2);
+    pub const NSAppKitVersionNumber10_13_4: Self = Self(1561.4);
+}

src/platform_impl/macos/appkit/view.rs

@@ -0,0 +1,95 @@
+use std::ffi::c_void;
+use std::num::NonZeroIsize;
+use std::ptr;
+
+use icrate::Foundation::{NSObject, NSPoint, NSRect};
+use objc2::rc::Id;
+use objc2::runtime::AnyObject;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+use super::{NSCursor, NSResponder, NSTextInputContext, NSWindow};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct NSView;
+
+    unsafe impl ClassType for NSView {
+        #[inherits(NSObject)]
+        type Super = NSResponder;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+// Documented as "Main Thread Only".
+// > generally thread safe, although operations on views such as creating,
+// > resizing, and moving should happen on the main thread.
+// <https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/CocoaFundamentals/AddingBehaviortoaCocoaProgram/AddingBehaviorCocoa.html#//apple_ref/doc/uid/TP40002974-CH5-SW47>
+//
+// > If you want to use a thread to draw to a view, bracket all drawing code
+// > between the lockFocusIfCanDraw and unlockFocus methods of NSView.
+// <https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/ThreadSafetySummary.html#//apple_ref/doc/uid/10000057i-CH12-123351-BBCFIIEB>
+
+extern_methods!(
+    /// Getter methods
+    unsafe impl NSView {
+        #[method(frame)]
+        pub fn frame(&self) -> NSRect;
+
+        #[method(bounds)]
+        pub fn bounds(&self) -> NSRect;
+
+        #[method_id(inputContext)]
+        pub fn inputContext(
+            &self,
+            // _mtm: MainThreadMarker,
+        ) -> Option<Id<NSTextInputContext>>;
+
+        #[method(hasMarkedText)]
+        pub fn hasMarkedText(&self) -> bool;
+
+        #[method(convertPoint:fromView:)]
+        pub fn convertPoint_fromView(&self, point: NSPoint, view: Option<&NSView>) -> NSPoint;
+
+        #[method_id(window)]
+        pub fn window(&self) -> Option<Id<NSWindow>>;
+    }
+
+    unsafe impl NSView {
+        #[method(setWantsBestResolutionOpenGLSurface:)]
+        pub fn setWantsBestResolutionOpenGLSurface(&self, value: bool);
+
+        #[method(setWantsLayer:)]
+        pub fn setWantsLayer(&self, wants_layer: bool);
+
+        #[method(setPostsFrameChangedNotifications:)]
+        pub fn setPostsFrameChangedNotifications(&self, value: bool);
+
+        #[method(removeTrackingRect:)]
+        pub fn removeTrackingRect(&self, tag: NSTrackingRectTag);
+
+        #[method(addTrackingRect:owner:userData:assumeInside:)]
+        unsafe fn inner_addTrackingRect(
+            &self,
+            rect: NSRect,
+            owner: &AnyObject,
+            user_data: *mut c_void,
+            assume_inside: bool,
+        ) -> Option<NSTrackingRectTag>;
+
+        pub fn add_tracking_rect(&self, rect: NSRect, assume_inside: bool) -> NSTrackingRectTag {
+            // SAFETY: The user data is NULL, so it is valid
+            unsafe { self.inner_addTrackingRect(rect, self, ptr::null_mut(), assume_inside) }
+                .expect("failed creating tracking rect")
+        }
+
+        #[method(addCursorRect:cursor:)]
+        // NSCursor safe to take by shared reference since it is already immutable
+        pub fn addCursorRect(&self, rect: NSRect, cursor: &NSCursor);
+
+        #[method(setHidden:)]
+        pub fn setHidden(&self, hidden: bool);
+    }
+);
+
+/// <https://developer.apple.com/documentation/appkit/nstrackingrecttag?language=objc>
+pub type NSTrackingRectTag = NonZeroIsize; // NSInteger, but non-zero!

src/platform_impl/macos/appkit/window.rs

@@ -0,0 +1,440 @@
+use icrate::Foundation::{
+    CGFloat, NSArray, NSInteger, NSObject, NSPoint, NSRect, NSSize, NSString, NSUInteger,
+};
+use objc2::encode::{Encode, Encoding};
+use objc2::rc::Id;
+use objc2::runtime::AnyObject;
+use objc2::{extern_class, extern_methods, mutability, ClassType};
+
+use super::{
+    NSButton, NSColor, NSEvent, NSPasteboardType, NSResponder, NSScreen, NSView, NSWindowTabGroup,
+};
+
+extern_class!(
+    /// Main-Thread-Only!
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub struct NSWindow;
+
+    unsafe impl ClassType for NSWindow {
+        #[inherits(NSObject)]
+        type Super = NSResponder;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+// Documented as "Main Thread Only", but:
+// > Thread safe in that you can create and manage them on a secondary thread.
+// <https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/CocoaFundamentals/AddingBehaviortoaCocoaProgram/AddingBehaviorCocoa.html#//apple_ref/doc/uid/TP40002974-CH5-SW47>
+// <https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/ThreadSafetySummary.html#//apple_ref/doc/uid/10000057i-CH12-123364>
+//
+// So could in theory be `Send`, and perhaps also `Sync` - but we would like
+// interior mutability on windows, since that's just much easier, and in that
+// case, they can't be!
+
+extern_methods!(
+    unsafe impl NSWindow {
+        #[method(frame)]
+        pub(crate) fn frame(&self) -> NSRect;
+
+        #[method(windowNumber)]
+        pub(crate) fn windowNumber(&self) -> NSInteger;
+
+        #[method(backingScaleFactor)]
+        pub(crate) fn backingScaleFactor(&self) -> CGFloat;
+
+        #[method_id(contentView)]
+        pub(crate) fn contentView(&self) -> Id<NSView>;
+
+        #[method(setContentView:)]
+        pub(crate) fn setContentView(&self, view: &NSView);
+
+        #[method(setInitialFirstResponder:)]
+        pub(crate) fn setInitialFirstResponder(&self, view: &NSView);
+
+        #[method(makeFirstResponder:)]
+        #[must_use]
+        pub(crate) fn makeFirstResponder(&self, responder: Option<&NSResponder>) -> bool;
+
+        #[method(contentRectForFrameRect:)]
+        pub(crate) fn contentRectForFrameRect(&self, windowFrame: NSRect) -> NSRect;
+
+        #[method_id(screen)]
+        pub(crate) fn screen(&self) -> Option<Id<NSScreen>>;
+
+        #[method(setContentSize:)]
+        pub(crate) fn setContentSize(&self, contentSize: NSSize);
+
+        #[method(setFrameTopLeftPoint:)]
+        pub(crate) fn setFrameTopLeftPoint(&self, point: NSPoint);
+
+        #[method(setMinSize:)]
+        pub(crate) fn setMinSize(&self, minSize: NSSize);
+
+        #[method(setMaxSize:)]
+        pub(crate) fn setMaxSize(&self, maxSize: NSSize);
+
+        #[method(setResizeIncrements:)]
+        pub(crate) fn setResizeIncrements(&self, increments: NSSize);
+
+        #[method(contentResizeIncrements)]
+        pub(crate) fn contentResizeIncrements(&self) -> NSSize;
+
+        #[method(setContentResizeIncrements:)]
+        pub(crate) fn setContentResizeIncrements(&self, increments: NSSize);
+
+        #[method(setFrame:display:)]
+        pub(crate) fn setFrame_display(&self, frameRect: NSRect, flag: bool);
+
+        #[method(setMovable:)]
+        pub(crate) fn setMovable(&self, movable: bool);
+
+        #[method(setSharingType:)]
+        pub(crate) fn setSharingType(&self, sharingType: NSWindowSharingType);
+
+        #[method(setTabbingMode:)]
+        pub(crate) fn setTabbingMode(&self, tabbingMode: NSWindowTabbingMode);
+
+        #[method(setOpaque:)]
+        pub(crate) fn setOpaque(&self, opaque: bool);
+
+        #[method(hasShadow)]
+        pub(crate) fn hasShadow(&self) -> bool;
+
+        #[method(setHasShadow:)]
+        pub(crate) fn setHasShadow(&self, has_shadow: bool);
+
+        #[method(setIgnoresMouseEvents:)]
+        pub(crate) fn setIgnoresMouseEvents(&self, ignores: bool);
+
+        #[method(setBackgroundColor:)]
+        pub(crate) fn setBackgroundColor(&self, color: &NSColor);
+
+        #[method(styleMask)]
+        pub(crate) fn styleMask(&self) -> NSWindowStyleMask;
+
+        #[method(setStyleMask:)]
+        pub(crate) fn setStyleMask(&self, mask: NSWindowStyleMask);
+
+        #[method(registerForDraggedTypes:)]
+        pub(crate) fn registerForDraggedTypes(&self, types: &NSArray<NSPasteboardType>);
+
+        #[method(makeKeyAndOrderFront:)]
+        pub(crate) fn makeKeyAndOrderFront(&self, sender: Option<&AnyObject>);
+
+        #[method(orderFront:)]
+        pub(crate) fn orderFront(&self, sender: Option<&AnyObject>);
+
+        #[method(miniaturize:)]
+        pub(crate) fn miniaturize(&self, sender: Option<&AnyObject>);
+
+        #[method(deminiaturize:)]
+        pub(crate) fn deminiaturize(&self, sender: Option<&AnyObject>);
+
+        #[method(toggleFullScreen:)]
+        pub(crate) fn toggleFullScreen(&self, sender: Option<&AnyObject>);
+
+        #[method(orderOut:)]
+        pub(crate) fn orderOut(&self, sender: Option<&AnyObject>);
+
+        #[method(zoom:)]
+        pub(crate) fn zoom(&self, sender: Option<&AnyObject>);
+
+        #[method(selectNextKeyView:)]
+        pub(crate) fn selectNextKeyView(&self, sender: Option<&AnyObject>);
+
+        #[method(selectPreviousKeyView:)]
+        pub(crate) fn selectPreviousKeyView(&self, sender: Option<&AnyObject>);
+
+        #[method_id(firstResponder)]
+        pub(crate) fn firstResponder(&self) -> Option<Id<NSResponder>>;
+
+        #[method_id(standardWindowButton:)]
+        pub(crate) fn standardWindowButton(&self, kind: NSWindowButton) -> Option<Id<NSButton>>;
+
+        #[method(setTitle:)]
+        pub(crate) fn setTitle(&self, title: &NSString);
+
+        #[method_id(title)]
+        pub(crate) fn title_(&self) -> Id<NSString>;
+
+        #[method(setReleasedWhenClosed:)]
+        pub(crate) fn setReleasedWhenClosed(&self, val: bool);
+
+        #[method(setAcceptsMouseMovedEvents:)]
+        pub(crate) fn setAcceptsMouseMovedEvents(&self, val: bool);
+
+        #[method(setTitlebarAppearsTransparent:)]
+        pub(crate) fn setTitlebarAppearsTransparent(&self, val: bool);
+
+        #[method(setTitleVisibility:)]
+        pub(crate) fn setTitleVisibility(&self, visibility: NSWindowTitleVisibility);
+
+        #[method(setMovableByWindowBackground:)]
+        pub(crate) fn setMovableByWindowBackground(&self, val: bool);
+
+        #[method(setLevel:)]
+        pub(crate) fn setLevel(&self, level: NSWindowLevel);
+
+        #[method(setAllowsAutomaticWindowTabbing:)]
+        pub(crate) fn setAllowsAutomaticWindowTabbing(val: bool);
+
+        #[method(setTabbingIdentifier:)]
+        pub(crate) fn setTabbingIdentifier(&self, identifier: &NSString);
+
+        #[method(setDocumentEdited:)]
+        pub(crate) fn setDocumentEdited(&self, val: bool);
+
+        #[method(occlusionState)]
+        pub(crate) fn occlusionState(&self) -> NSWindowOcclusionState;
+
+        #[method(center)]
+        pub(crate) fn center(&self);
+
+        #[method(isResizable)]
+        pub(crate) fn isResizable(&self) -> bool;
+
+        #[method(isMiniaturizable)]
+        pub(crate) fn isMiniaturizable(&self) -> bool;
+
+        #[method(hasCloseBox)]
+        pub(crate) fn hasCloseBox(&self) -> bool;
+
+        #[method(isMiniaturized)]
+        pub(crate) fn isMiniaturized(&self) -> bool;
+
+        #[method(isVisible)]
+        pub(crate) fn isVisible(&self) -> bool;
+
+        #[method(isKeyWindow)]
+        pub(crate) fn isKeyWindow(&self) -> bool;
+
+        #[method(isZoomed)]
+        pub(crate) fn isZoomed(&self) -> bool;
+
+        #[method(allowsAutomaticWindowTabbing)]
+        pub(crate) fn allowsAutomaticWindowTabbing() -> bool;
+
+        #[method(selectNextTab)]
+        pub(crate) fn selectNextTab(&self);
+
+        #[method_id(tabbingIdentifier)]
+        pub(crate) fn tabbingIdentifier(&self) -> Id<NSString>;
+
+        #[method_id(tabGroup)]
+        pub(crate) fn tabGroup(&self) -> Option<Id<NSWindowTabGroup>>;
+
+        #[method(isDocumentEdited)]
+        pub(crate) fn isDocumentEdited(&self) -> bool;
+
+        #[method(close)]
+        pub(crate) fn close(&self);
+
+        #[method(performWindowDragWithEvent:)]
+        // TODO: Can this actually accept NULL?
+        pub(crate) fn performWindowDragWithEvent(&self, event: Option<&NSEvent>);
+
+        #[method(invalidateCursorRectsForView:)]
+        pub(crate) fn invalidateCursorRectsForView(&self, view: &NSView);
+
+        #[method(setDelegate:)]
+        pub(crate) fn setDelegate(&self, delegate: Option<&NSObject>);
+
+        #[method(sendEvent:)]
+        pub(crate) unsafe fn sendEvent(&self, event: &NSEvent);
+
+        #[method(addChildWindow:ordered:)]
+        pub(crate) unsafe fn addChildWindow(&self, child: &NSWindow, ordered: NSWindowOrderingMode);
+    }
+);
+
+#[allow(dead_code)]
+#[repr(isize)] // NSInteger
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSWindowTitleVisibility {
+    #[doc(alias = "NSWindowTitleVisible")]
+    Visible = 0,
+    #[doc(alias = "NSWindowTitleHidden")]
+    Hidden = 1,
+}
+
+unsafe impl Encode for NSWindowTitleVisibility {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}
+
+#[allow(dead_code)]
+#[repr(usize)] // NSUInteger
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSWindowButton {
+    #[doc(alias = "NSWindowCloseButton")]
+    Close = 0,
+    #[doc(alias = "NSWindowMiniaturizeButton")]
+    Miniaturize = 1,
+    #[doc(alias = "NSWindowZoomButton")]
+    Zoom = 2,
+    #[doc(alias = "NSWindowToolbarButton")]
+    Toolbar = 3,
+    #[doc(alias = "NSWindowDocumentIconButton")]
+    DocumentIcon = 4,
+    #[doc(alias = "NSWindowDocumentVersionsButton")]
+    DocumentVersions = 6,
+    #[doc(alias = "NSWindowFullScreenButton")]
+    #[deprecated = "Deprecated since macOS 10.12"]
+    FullScreen = 7,
+}
+
+unsafe impl Encode for NSWindowButton {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}
+
+// CGWindowLevel.h
+//
+// Note: There are two different things at play in this header:
+// `CGWindowLevel` and `CGWindowLevelKey`.
+//
+// It seems like there was a push towards using "key" values instead of the
+// raw window level values, and then you were supposed to use
+// `CGWindowLevelForKey` to get the actual level.
+//
+// But the values that `NSWindowLevel` has are compiled in, and as such has
+// to remain ABI compatible, so they're safe for us to hardcode as well.
+#[allow(dead_code)]
+mod window_level {
+    const kCGNumReservedWindowLevels: i32 = 16;
+    const kCGNumReservedBaseWindowLevels: i32 = 5;
+
+    pub const kCGBaseWindowLevel: i32 = i32::MIN;
+    pub const kCGMinimumWindowLevel: i32 = kCGBaseWindowLevel + kCGNumReservedBaseWindowLevels;
+    pub const kCGMaximumWindowLevel: i32 = i32::MAX - kCGNumReservedWindowLevels;
+
+    pub const kCGDesktopWindowLevel: i32 = kCGMinimumWindowLevel + 20;
+    pub const kCGDesktopIconWindowLevel: i32 = kCGDesktopWindowLevel + 20;
+    pub const kCGBackstopMenuLevel: i32 = -20;
+    pub const kCGNormalWindowLevel: i32 = 0;
+    pub const kCGFloatingWindowLevel: i32 = 3;
+    pub const kCGTornOffMenuWindowLevel: i32 = 3;
+    pub const kCGModalPanelWindowLevel: i32 = 8;
+    pub const kCGUtilityWindowLevel: i32 = 19;
+    pub const kCGDockWindowLevel: i32 = 20;
+    pub const kCGMainMenuWindowLevel: i32 = 24;
+    pub const kCGStatusWindowLevel: i32 = 25;
+    pub const kCGPopUpMenuWindowLevel: i32 = 101;
+    pub const kCGOverlayWindowLevel: i32 = 102;
+    pub const kCGHelpWindowLevel: i32 = 200;
+    pub const kCGDraggingWindowLevel: i32 = 500;
+    pub const kCGScreenSaverWindowLevel: i32 = 1000;
+    pub const kCGAssistiveTechHighWindowLevel: i32 = 1500;
+    pub const kCGCursorWindowLevel: i32 = kCGMaximumWindowLevel - 1;
+}
+use window_level::*;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+#[repr(transparent)]
+pub struct NSWindowLevel(pub NSInteger);
+
+#[allow(dead_code)]
+impl NSWindowLevel {
+    #[doc(alias = "BelowNormalWindowLevel")]
+    pub const BELOW_NORMAL: Self = Self((kCGNormalWindowLevel - 1) as _);
+    #[doc(alias = "NSNormalWindowLevel")]
+    pub const Normal: Self = Self(kCGNormalWindowLevel as _);
+    #[doc(alias = "NSFloatingWindowLevel")]
+    pub const Floating: Self = Self(kCGFloatingWindowLevel as _);
+    #[doc(alias = "NSTornOffMenuWindowLevel")]
+    pub const TornOffMenu: Self = Self(kCGTornOffMenuWindowLevel as _);
+    #[doc(alias = "NSModalPanelWindowLevel")]
+    pub const ModalPanel: Self = Self(kCGModalPanelWindowLevel as _);
+    #[doc(alias = "NSMainMenuWindowLevel")]
+    pub const MainMenu: Self = Self(kCGMainMenuWindowLevel as _);
+    #[doc(alias = "NSStatusWindowLevel")]
+    pub const Status: Self = Self(kCGStatusWindowLevel as _);
+    #[doc(alias = "NSPopUpMenuWindowLevel")]
+    pub const PopUpMenu: Self = Self(kCGPopUpMenuWindowLevel as _);
+    #[doc(alias = "NSScreenSaverWindowLevel")]
+    pub const ScreenSaver: Self = Self(kCGScreenSaverWindowLevel as _);
+}
+
+unsafe impl Encode for NSWindowLevel {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}
+
+bitflags! {
+    #[derive(Clone, Copy)]
+    pub struct NSWindowOcclusionState: NSUInteger {
+        const NSWindowOcclusionStateVisible = 1 << 1;
+    }
+}
+
+unsafe impl Encode for NSWindowOcclusionState {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}
+
+bitflags! {
+    #[derive(Debug, Clone, Copy)]
+    pub struct NSWindowStyleMask: NSUInteger {
+        const NSBorderlessWindowMask      = 0;
+        const NSTitledWindowMask          = 1 << 0;
+        const NSClosableWindowMask        = 1 << 1;
+        const NSMiniaturizableWindowMask  = 1 << 2;
+        const NSResizableWindowMask       = 1 << 3;
+        const NSTexturedBackgroundWindowMask  = 1 << 8;
+        const NSUnifiedTitleAndToolbarWindowMask  = 1 << 12;
+        const NSFullScreenWindowMask      = 1 << 14;
+        const NSFullSizeContentViewWindowMask = 1 << 15;
+    }
+}
+
+unsafe impl Encode for NSWindowStyleMask {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}
+
+#[allow(dead_code)]
+#[repr(usize)] // NSUInteger
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSBackingStoreType {
+    NSBackingStoreRetained = 0,
+    NSBackingStoreNonretained = 1,
+    NSBackingStoreBuffered = 2,
+}
+
+unsafe impl Encode for NSBackingStoreType {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}
+
+#[allow(dead_code)]
+#[repr(usize)] // NSUInteger
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSWindowSharingType {
+    NSWindowSharingNone = 0,
+    NSWindowSharingReadOnly = 1,
+    NSWindowSharingReadWrite = 2,
+}
+
+unsafe impl Encode for NSWindowSharingType {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}
+
+#[allow(dead_code)]
+#[repr(isize)] // NSInteger
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSWindowOrderingMode {
+    NSWindowAbove = 1,
+    NSWindowBelow = -1,
+    NSWindowOut = 0,
+}
+
+unsafe impl Encode for NSWindowOrderingMode {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}
+
+#[allow(dead_code)]
+#[repr(isize)] // NSInteger
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum NSWindowTabbingMode {
+    NSWindowTabbingModeAutomatic = 0,
+    NSWindowTabbingModeDisallowed = 2,
+    NSWindowTabbingModePreferred = 1,
+}
+
+unsafe impl Encode for NSWindowTabbingMode {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}

src/platform_impl/macos/cursor.rs

@@ -1,228 +0,0 @@
-use icrate::AppKit::{NSBitmapImageRep, NSCursor, NSDeviceRGBColorSpace, NSImage};
-use icrate::Foundation::{
-    ns_string, NSData, NSDictionary, NSNumber, NSObject, NSObjectProtocol, NSPoint, NSSize,
-    NSString,
-};
-use objc2::rc::Id;
-use objc2::runtime::Sel;
-use objc2::{msg_send_id, sel, ClassType};
-use once_cell::sync::Lazy;
-use std::ffi::c_uchar;
-use std::slice;
-
-use super::EventLoopWindowTarget;
-use crate::cursor::CursorImage;
-use crate::cursor::OnlyCursorImageBuilder;
-use crate::window::CursorIcon;
-
-#[derive(Clone, Debug, PartialEq, Eq, Hash)]
-pub struct CustomCursor(pub(crate) Id<NSCursor>);
-
-// SAFETY: NSCursor is immutable and thread-safe
-// TODO(madsmtm): Put this logic in icrate itself
-unsafe impl Send for CustomCursor {}
-unsafe impl Sync for CustomCursor {}
-
-impl CustomCursor {
-    pub(crate) fn build<T>(
-        cursor: OnlyCursorImageBuilder,
-        _: &EventLoopWindowTarget<T>,
-    ) -> CustomCursor {
-        Self(cursor_from_image(&cursor.0))
-    }
-}
-
-pub(crate) fn cursor_from_image(cursor: &CursorImage) -> Id<NSCursor> {
-    let width = cursor.width;
-    let height = cursor.height;
-
-    let bitmap = unsafe {
-        NSBitmapImageRep::initWithBitmapDataPlanes_pixelsWide_pixelsHigh_bitsPerSample_samplesPerPixel_hasAlpha_isPlanar_colorSpaceName_bytesPerRow_bitsPerPixel(
-            NSBitmapImageRep::alloc(),
-            std::ptr::null_mut::<*mut c_uchar>(),
-            width as isize,
-            height as isize,
-            8,
-            4,
-            true,
-            false,
-            NSDeviceRGBColorSpace,
-            width as isize * 4,
-            32,
-        ).unwrap()
-    };
-    let bitmap_data = unsafe { slice::from_raw_parts_mut(bitmap.bitmapData(), cursor.rgba.len()) };
-    bitmap_data.copy_from_slice(&cursor.rgba);
-
-    let image = unsafe {
-        NSImage::initWithSize(NSImage::alloc(), NSSize::new(width.into(), height.into()))
-    };
-    unsafe { image.addRepresentation(&bitmap) };
-
-    let hotspot = NSPoint::new(cursor.hotspot_x as f64, cursor.hotspot_y as f64);
-
-    NSCursor::initWithImage_hotSpot(NSCursor::alloc(), &image, hotspot)
-}
-
-pub(crate) fn default_cursor() -> Id<NSCursor> {
-    NSCursor::arrowCursor()
-}
-
-unsafe fn try_cursor_from_selector(sel: Sel) -> Option<Id<NSCursor>> {
-    let cls = NSCursor::class();
-    if cls.responds_to(sel) {
-        let cursor: Id<NSCursor> = unsafe { msg_send_id![cls, performSelector: sel] };
-        Some(cursor)
-    } else {
-        warn!("cursor `{sel}` appears to be invalid");
-        None
-    }
-}
-
-macro_rules! def_undocumented_cursor {
-    {$(
-        $(#[$($m:meta)*])*
-        fn $name:ident();
-    )*} => {$(
-        $(#[$($m)*])*
-        #[allow(non_snake_case)]
-        fn $name() -> Id<NSCursor> {
-            unsafe { try_cursor_from_selector(sel!($name)).unwrap_or_else(|| default_cursor()) }
-        }
-    )*};
-}
-
-def_undocumented_cursor!(
-    // Undocumented cursors: https://stackoverflow.com/a/46635398/5435443
-    fn _helpCursor();
-    fn _zoomInCursor();
-    fn _zoomOutCursor();
-    fn _windowResizeNorthEastCursor();
-    fn _windowResizeNorthWestCursor();
-    fn _windowResizeSouthEastCursor();
-    fn _windowResizeSouthWestCursor();
-    fn _windowResizeNorthEastSouthWestCursor();
-    fn _windowResizeNorthWestSouthEastCursor();
-
-    // While these two are available, the former just loads a white arrow,
-    // and the latter loads an ugly deflated beachball!
-    // pub fn _moveCursor();
-    // pub fn _waitCursor();
-
-    // An even more undocumented cursor...
-    // https://bugs.eclipse.org/bugs/show_bug.cgi?id=522349
-    fn busyButClickableCursor();
-);
-
-// Note that loading `busybutclickable` with this code won't animate
-// the frames; instead you'll just get them all in a column.
-unsafe fn load_webkit_cursor(name: &NSString) -> Id<NSCursor> {
-    // Snatch a cursor from WebKit; They fit the style of the native
-    // cursors, and will seem completely standard to macOS users.
-    //
-    // https://stackoverflow.com/a/21786835/5435443
-    let root = ns_string!("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/HIServices.framework/Versions/A/Resources/cursors");
-    let cursor_path = root.stringByAppendingPathComponent(name);
-
-    let pdf_path = cursor_path.stringByAppendingPathComponent(ns_string!("cursor.pdf"));
-    let image = NSImage::initByReferencingFile(NSImage::alloc(), &pdf_path).unwrap();
-
-    // TODO: Handle PLists better
-    let info_path = cursor_path.stringByAppendingPathComponent(ns_string!("info.plist"));
-    let info: Id<NSDictionary<NSObject, NSObject>> = unsafe {
-        msg_send_id![
-            <NSDictionary<NSObject, NSObject>>::class(),
-            dictionaryWithContentsOfFile: &*info_path,
-        ]
-    };
-    let mut x = 0.0;
-    if let Some(n) = info.get(&*ns_string!("hotx")) {
-        if n.is_kind_of::<NSNumber>() {
-            let ptr: *const NSObject = n;
-            let ptr: *const NSNumber = ptr.cast();
-            x = unsafe { &*ptr }.as_cgfloat()
-        }
-    }
-    let mut y = 0.0;
-    if let Some(n) = info.get(&*ns_string!("hotx")) {
-        if n.is_kind_of::<NSNumber>() {
-            let ptr: *const NSObject = n;
-            let ptr: *const NSNumber = ptr.cast();
-            y = unsafe { &*ptr }.as_cgfloat()
-        }
-    }
-
-    let hotspot = NSPoint::new(x, y);
-    NSCursor::initWithImage_hotSpot(NSCursor::alloc(), &image, hotspot)
-}
-
-fn webkit_move() -> Id<NSCursor> {
-    unsafe { load_webkit_cursor(ns_string!("move")) }
-}
-
-fn webkit_cell() -> Id<NSCursor> {
-    unsafe { load_webkit_cursor(ns_string!("cell")) }
-}
-
-pub(crate) fn invisible_cursor() -> Id<NSCursor> {
-    // 16x16 GIF data for invisible cursor
-    // You can reproduce this via ImageMagick.
-    // $ convert -size 16x16 xc:none cursor.gif
-    static CURSOR_BYTES: &[u8] = &[
-        0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x10, 0x00, 0x10, 0x00, 0xF0, 0x00, 0x00, 0x00, 0x00,
-        0x00, 0x00, 0x00, 0x00, 0x21, 0xF9, 0x04, 0x01, 0x00, 0x00, 0x00, 0x00, 0x2C, 0x00, 0x00,
-        0x00, 0x00, 0x10, 0x00, 0x10, 0x00, 0x00, 0x02, 0x0E, 0x84, 0x8F, 0xA9, 0xCB, 0xED, 0x0F,
-        0xA3, 0x9C, 0xB4, 0xDA, 0x8B, 0xB3, 0x3E, 0x05, 0x00, 0x3B,
-    ];
-
-    static CURSOR: Lazy<CustomCursor> = Lazy::new(|| {
-        // TODO: Consider using `dataWithBytesNoCopy:`
-        let data = NSData::with_bytes(CURSOR_BYTES);
-        let image = NSImage::initWithData(NSImage::alloc(), &data).unwrap();
-        let hotspot = NSPoint::new(0.0, 0.0);
-        CustomCursor(NSCursor::initWithImage_hotSpot(
-            NSCursor::alloc(),
-            &image,
-            hotspot,
-        ))
-    });
-
-    CURSOR.0.clone()
-}
-
-pub(crate) fn cursor_from_icon(icon: CursorIcon) -> Id<NSCursor> {
-    match icon {
-        CursorIcon::Default => default_cursor(),
-        CursorIcon::Pointer => NSCursor::pointingHandCursor(),
-        CursorIcon::Grab => NSCursor::openHandCursor(),
-        CursorIcon::Grabbing => NSCursor::closedHandCursor(),
-        CursorIcon::Text => NSCursor::IBeamCursor(),
-        CursorIcon::VerticalText => NSCursor::IBeamCursorForVerticalLayout(),
-        CursorIcon::Copy => NSCursor::dragCopyCursor(),
-        CursorIcon::Alias => NSCursor::dragLinkCursor(),
-        CursorIcon::NotAllowed | CursorIcon::NoDrop => NSCursor::operationNotAllowedCursor(),
-        CursorIcon::ContextMenu => NSCursor::contextualMenuCursor(),
-        CursorIcon::Crosshair => NSCursor::crosshairCursor(),
-        CursorIcon::EResize => NSCursor::resizeRightCursor(),
-        CursorIcon::NResize => NSCursor::resizeUpCursor(),
-        CursorIcon::WResize => NSCursor::resizeLeftCursor(),
-        CursorIcon::SResize => NSCursor::resizeDownCursor(),
-        CursorIcon::EwResize | CursorIcon::ColResize => NSCursor::resizeLeftRightCursor(),
-        CursorIcon::NsResize | CursorIcon::RowResize => NSCursor::resizeUpDownCursor(),
-        CursorIcon::Help => _helpCursor(),
-        CursorIcon::ZoomIn => _zoomInCursor(),
-        CursorIcon::ZoomOut => _zoomOutCursor(),
-        CursorIcon::NeResize => _windowResizeNorthEastCursor(),
-        CursorIcon::NwResize => _windowResizeNorthWestCursor(),
-        CursorIcon::SeResize => _windowResizeSouthEastCursor(),
-        CursorIcon::SwResize => _windowResizeSouthWestCursor(),
-        CursorIcon::NeswResize => _windowResizeNorthEastSouthWestCursor(),
-        CursorIcon::NwseResize => _windowResizeNorthWestSouthEastCursor(),
-        // This is the wrong semantics for `Wait`, but it's the same as
-        // what's used in Safari and Chrome.
-        CursorIcon::Wait | CursorIcon::Progress => busyButClickableCursor(),
-        CursorIcon::Move | CursorIcon::AllScroll => webkit_move(),
-        CursorIcon::Cell => webkit_cell(),
-        _ => default_cursor(),
-    }
-}

src/platform_impl/macos/event.rs

@@ -4,15 +4,10 @@ use core_foundation::{
     base::CFRelease,
     data::{CFDataGetBytePtr, CFDataRef},
 };
-use icrate::AppKit::{
-    NSEvent, NSEventModifierFlagCommand, NSEventModifierFlagControl, NSEventModifierFlagOption,
-    NSEventModifierFlagShift, NSEventModifierFlags, NSEventSubtypeWindowExposed,
-    NSEventTypeApplicationDefined,
-};
-use icrate::Foundation::{MainThreadMarker, NSPoint};
-use objc2::rc::Id;
+use icrate::Foundation::MainThreadMarker;
 use smol_str::SmolStr;
 
+use super::appkit::{NSEvent, NSEventModifierFlags};
 use crate::{
     event::{ElementState, KeyEvent, Modifiers},
     keyboard::{
@@ -103,7 +98,8 @@ pub fn get_modifierless_char(scancode: u16) -> Key {
 }
 
 fn get_logical_key_char(ns_event: &NSEvent, modifierless_chars: &str) -> Key {
-    let string = unsafe { ns_event.charactersIgnoringModifiers() }
+    let string = ns_event
+        .charactersIgnoringModifiers()
         .map(|s| s.to_string())
         .unwrap_or_default();
     if string.is_empty() {
@@ -126,14 +122,15 @@ pub(crate) fn create_key_event(
     use ElementState::{Pressed, Released};
     let state = if is_press { Pressed } else { Released };
 
-    let scancode = unsafe { ns_event.keyCode() };
+    let scancode = ns_event.key_code();
     let mut physical_key =
         key_override.unwrap_or_else(|| PhysicalKey::from_scancode(scancode as u32));
 
     let text_with_all_modifiers: Option<SmolStr> = if key_override.is_some() {
         None
     } else {
-        let characters = unsafe { ns_event.characters() }
+        let characters = ns_event
+            .characters()
             .map(|s| s.to_string())
             .unwrap_or_default();
         if characters.is_empty() {
@@ -151,8 +148,8 @@ pub(crate) fn create_key_event(
     let (logical_key, key_without_modifiers) = if matches!(key_from_code, Key::Unidentified(_)) {
         let key_without_modifiers = get_modifierless_char(scancode);
 
-        let modifiers = unsafe { ns_event.modifierFlags() };
-        let has_ctrl = flags_contains(modifiers, NSEventModifierFlagControl);
+        let modifiers = NSEvent::modifierFlags(ns_event);
+        let has_ctrl = modifiers.contains(NSEventModifierFlags::NSControlKeyMask);
 
         let logical_key = match text_with_all_modifiers.as_ref() {
             // Only checking for ctrl here, not checking for alt because we DO want to
@@ -314,107 +311,49 @@ pub fn extra_function_key_to_code(scancode: u16, string: &str) -> PhysicalKey {
     }
 }
 
-// The values are from the https://github.com/apple-oss-distributions/IOHIDFamily/blob/19666c840a6d896468416ff0007040a10b7b46b8/IOHIDSystem/IOKit/hidsystem/IOLLEvent.h#L258-L259
-const NX_DEVICELCTLKEYMASK: NSEventModifierFlags = 0x00000001;
-const NX_DEVICELSHIFTKEYMASK: NSEventModifierFlags = 0x00000002;
-const NX_DEVICERSHIFTKEYMASK: NSEventModifierFlags = 0x00000004;
-const NX_DEVICELCMDKEYMASK: NSEventModifierFlags = 0x00000008;
-const NX_DEVICERCMDKEYMASK: NSEventModifierFlags = 0x00000010;
-const NX_DEVICELALTKEYMASK: NSEventModifierFlags = 0x00000020;
-const NX_DEVICERALTKEYMASK: NSEventModifierFlags = 0x00000040;
-const NX_DEVICERCTLKEYMASK: NSEventModifierFlags = 0x00002000;
-
-pub(super) fn flags_contains(flags: NSEventModifierFlags, value: NSEventModifierFlags) -> bool {
-    flags & value == value
-}
-
-pub(super) fn lalt_pressed(event: &NSEvent) -> bool {
-    flags_contains(unsafe { event.modifierFlags() }, NX_DEVICELALTKEYMASK)
-}
-
-pub(super) fn ralt_pressed(event: &NSEvent) -> bool {
-    flags_contains(unsafe { event.modifierFlags() }, NX_DEVICERALTKEYMASK)
-}
-
 pub(super) fn event_mods(event: &NSEvent) -> Modifiers {
-    let flags = unsafe { event.modifierFlags() };
+    let flags = event.modifierFlags();
     let mut state = ModifiersState::empty();
     let mut pressed_mods = ModifiersKeys::empty();
 
     state.set(
         ModifiersState::SHIFT,
-        flags_contains(flags, NSEventModifierFlagShift),
-    );
-    pressed_mods.set(
-        ModifiersKeys::LSHIFT,
-        flags_contains(flags, NX_DEVICELSHIFTKEYMASK),
-    );
-    pressed_mods.set(
-        ModifiersKeys::RSHIFT,
-        flags_contains(flags, NX_DEVICERSHIFTKEYMASK),
+        flags.contains(NSEventModifierFlags::NSShiftKeyMask),
     );
 
+    pressed_mods.set(ModifiersKeys::LSHIFT, event.lshift_pressed());
+    pressed_mods.set(ModifiersKeys::RSHIFT, event.rshift_pressed());
+
     state.set(
         ModifiersState::CONTROL,
-        flags_contains(flags, NSEventModifierFlagControl),
-    );
-    pressed_mods.set(
-        ModifiersKeys::LCONTROL,
-        flags_contains(flags, NX_DEVICELCTLKEYMASK),
-    );
-    pressed_mods.set(
-        ModifiersKeys::RCONTROL,
-        flags_contains(flags, NX_DEVICERCTLKEYMASK),
+        flags.contains(NSEventModifierFlags::NSControlKeyMask),
     );
 
+    pressed_mods.set(ModifiersKeys::LCONTROL, event.lctrl_pressed());
+    pressed_mods.set(ModifiersKeys::RCONTROL, event.rctrl_pressed());
+
     state.set(
         ModifiersState::ALT,
-        flags_contains(flags, NSEventModifierFlagOption),
-    );
-    pressed_mods.set(
-        ModifiersKeys::LALT,
-        flags_contains(flags, NX_DEVICELALTKEYMASK),
-    );
-    pressed_mods.set(
-        ModifiersKeys::RALT,
-        flags_contains(flags, NX_DEVICERALTKEYMASK),
+        flags.contains(NSEventModifierFlags::NSAlternateKeyMask),
     );
 
+    pressed_mods.set(ModifiersKeys::LALT, event.lalt_pressed());
+    pressed_mods.set(ModifiersKeys::RALT, event.ralt_pressed());
+
     state.set(
         ModifiersState::SUPER,
-        flags_contains(flags, NSEventModifierFlagCommand),
-    );
-    pressed_mods.set(
-        ModifiersKeys::LSUPER,
-        flags_contains(flags, NX_DEVICELCMDKEYMASK),
-    );
-    pressed_mods.set(
-        ModifiersKeys::RSUPER,
-        flags_contains(flags, NX_DEVICERCMDKEYMASK),
+        flags.contains(NSEventModifierFlags::NSCommandKeyMask),
     );
 
+    pressed_mods.set(ModifiersKeys::LSUPER, event.lcmd_pressed());
+    pressed_mods.set(ModifiersKeys::RSUPER, event.rcmd_pressed());
+
     Modifiers {
         state,
         pressed_mods,
     }
 }
 
-pub(super) fn dummy_event() -> Option<Id<NSEvent>> {
-    unsafe {
-        NSEvent::otherEventWithType_location_modifierFlags_timestamp_windowNumber_context_subtype_data1_data2(
-            NSEventTypeApplicationDefined,
-            NSPoint::new(0.0, 0.0),
-            0, // Empty NSEventModifierFlags
-            0.0,
-            0,
-            None,
-            NSEventSubtypeWindowExposed,
-            0,
-            0,
-        )
-    }
-}
-
 impl PhysicalKeyExtScancode for PhysicalKey {
     fn to_scancode(self) -> Option<u32> {
         let code = match self {

src/platform_impl/macos/event_loop.rs

@@ -17,18 +17,12 @@ use core_foundation::runloop::{
     kCFRunLoopCommonModes, CFRunLoopAddSource, CFRunLoopGetMain, CFRunLoopSourceContext,
     CFRunLoopSourceCreate, CFRunLoopSourceRef, CFRunLoopSourceSignal, CFRunLoopWakeUp,
 };
-use icrate::AppKit::{
-    NSApplication, NSApplicationActivationPolicyAccessory, NSApplicationActivationPolicyProhibited,
-    NSApplicationActivationPolicyRegular, NSWindow,
-};
-use icrate::Foundation::{MainThreadMarker, NSObjectProtocol};
+use icrate::Foundation::MainThreadMarker;
+use objc2::rc::{autoreleasepool, Id};
+use objc2::runtime::NSObjectProtocol;
 use objc2::{msg_send_id, ClassType};
-use objc2::{
-    rc::{autoreleasepool, Id},
-    runtime::ProtocolObject,
-};
 
-use super::event::dummy_event;
+use super::appkit::{NSApp, NSApplication, NSApplicationActivationPolicy, NSEvent, NSWindow};
 use crate::{
     error::EventLoopError,
     event::Event,
@@ -122,6 +116,10 @@ impl<T: 'static> EventLoopWindowTarget<T> {
         AppState::exit()
     }
 
+    pub(crate) fn clear_exit(&self) {
+        AppState::clear_exit()
+    }
+
     pub(crate) fn exiting(&self) -> bool {
         AppState::exiting()
     }
@@ -129,19 +127,19 @@ impl<T: 'static> EventLoopWindowTarget<T> {
 
 impl<T> EventLoopWindowTarget<T> {
     pub(crate) fn hide_application(&self) {
-        NSApplication::sharedApplication(self.mtm).hide(None)
+        NSApplication::shared(self.mtm).hide(None)
     }
 
     pub(crate) fn hide_other_applications(&self) {
-        NSApplication::sharedApplication(self.mtm).hideOtherApplications(None)
+        NSApplication::shared(self.mtm).hideOtherApplications(None)
     }
 
     pub(crate) fn set_allows_automatic_window_tabbing(&self, enabled: bool) {
-        NSWindow::setAllowsAutomaticWindowTabbing(enabled, self.mtm)
+        NSWindow::setAllowsAutomaticWindowTabbing(enabled)
     }
 
     pub(crate) fn allows_automatic_window_tabbing(&self) -> bool {
-        NSWindow::allowsAutomaticWindowTabbing(self.mtm)
+        NSWindow::allowsAutomaticWindowTabbing()
     }
 }
 
@@ -202,20 +200,20 @@ impl<T> EventLoop<T> {
             panic!("`winit` requires control over the principal class. You must create the event loop before other parts of your application initialize NSApplication");
         }
 
+        use NSApplicationActivationPolicy::*;
         let activation_policy = match attributes.activation_policy {
             ActivationPolicy::Regular => NSApplicationActivationPolicyRegular,
             ActivationPolicy::Accessory => NSApplicationActivationPolicyAccessory,
             ActivationPolicy::Prohibited => NSApplicationActivationPolicyProhibited,
         };
         let delegate = ApplicationDelegate::new(
-            mtm,
             activation_policy,
             attributes.default_menu,
             attributes.activate_ignoring_other_apps,
         );
 
         autoreleasepool(|_| {
-            app.setDelegate(Some(ProtocolObject::from_ref(&*delegate)));
+            app.setDelegate(&delegate);
         });
 
         let panic_info: Rc<PanicInfo> = Default::default();
@@ -313,7 +311,7 @@ impl<T> EventLoop<T> {
 
                 // While the app is running it's possible that we catch a panic
                 // to avoid unwinding across an objective-c ffi boundary, which
-                // will lead to us stopping the `NSApplication` and saving the
+                // will lead to us stopping the `NSApp` and saving the
                 // `PanicInfo` so that we can resume the unwind at a controlled,
                 // safe point in time.
                 if let Some(panic) = self.panic_info.take() {
@@ -361,6 +359,8 @@ impl<T> EventLoop<T> {
         self._callback = Some(Rc::clone(&callback));
 
         autoreleasepool(|_| {
+            let app = NSApp();
+
             // A bit of juggling with the callback references to make sure
             // that `self.callback` is the only owner of the callback.
             let weak_cb: Weak<_> = Rc::downgrade(&callback);
@@ -381,24 +381,25 @@ impl<T> EventLoop<T> {
             // catch panics to make sure we can't unwind without clearing the set callback
             // (which would leave the global `AppState` in an undefined, unsafe state)
             let catch_result = catch_unwind(AssertUnwindSafe(|| {
-                // As a special case, if the application hasn't been launched yet then we at least run
+                // As a special case, if the `NSApp` hasn't been launched yet then we at least run
                 // the loop until it has fully launched.
                 if !AppState::is_launched() {
                     debug_assert!(!AppState::is_running());
 
                     AppState::request_stop_on_launch();
                     unsafe {
-                        self.app.run();
+                        app.run();
                     }
 
-                    // Note: we dispatch `NewEvents(Init)` + `Resumed` events after the application has launched
+                    // Note: we dispatch `NewEvents(Init)` + `Resumed` events after the `NSApp` has launched
                 } else if !AppState::is_running() {
-                    // Even though the application may have been launched, it's possible we aren't running
+                    // Even though the NSApp may have been launched, it's possible we aren't running
                     // if the `EventLoop` was run before and has since exited. This indicates that
                     // we just starting to re-run the same `EventLoop` again.
                     AppState::start_running(); // Set is_running = true + dispatch `NewEvents(Init)` + `Resumed`
                 } else {
-                    // Only run for as long as the given `Duration` allows so we don't block the external loop.
+                    // Only run the NSApp for as long as the given `Duration` allows so we
+                    // don't block the external loop.
                     match timeout {
                         Some(Duration::ZERO) => {
                             AppState::set_wait_timeout(None);
@@ -418,13 +419,13 @@ impl<T> EventLoop<T> {
                     }
                     AppState::set_stop_app_on_redraw_requested(true);
                     unsafe {
-                        self.app.run();
+                        app.run();
                     }
                 }
 
                 // While the app is running it's possible that we catch a panic
                 // to avoid unwinding across an objective-c ffi boundary, which
-                // will lead to us stopping the application and saving the
+                // will lead to us stopping the `NSApp` and saving the
                 // `PanicInfo` so that we can resume the unwind at a controlled,
                 // safe point in time.
                 if let Some(panic) = self.panic_info.take() {
@@ -462,7 +463,6 @@ impl<T> EventLoop<T> {
 /// happens, stops the `sharedApplication`
 #[inline]
 pub fn stop_app_on_panic<F: FnOnce() -> R + UnwindSafe, R>(
-    mtm: MainThreadMarker,
     panic_info: Weak<PanicInfo>,
     f: F,
 ) -> Option<R> {
@@ -477,11 +477,11 @@ pub fn stop_app_on_panic<F: FnOnce() -> R + UnwindSafe, R>(
                 let panic_info = panic_info.upgrade().unwrap();
                 panic_info.set_panic(e);
             }
-            let app = NSApplication::sharedApplication(mtm);
+            let app = NSApp();
             app.stop(None);
             // Posting a dummy event to get `stop` to take effect immediately.
             // See: https://stackoverflow.com/questions/48041279/stopping-the-nsapplication-main-event-loop/48064752#48064752
-            app.postEvent_atStart(&dummy_event().unwrap(), true);
+            app.postEvent_atStart(&NSEvent::dummy(), true);
             None
         }
     }

src/platform_impl/macos/ffi.rs

@@ -210,45 +210,3 @@ extern "C" {
         unicodeString: *mut UniChar,
     ) -> OSStatus;
 }
-
-// CGWindowLevel.h
-//
-// Note: There are two different things at play in this header:
-// `CGWindowLevel` and `CGWindowLevelKey`.
-//
-// It seems like there was a push towards using "key" values instead of the
-// raw window level values, and then you were supposed to use
-// `CGWindowLevelForKey` to get the actual level.
-//
-// But the values that `NSWindowLevel` has are compiled in, and as such has
-// to remain ABI compatible, so they're safe for us to hardcode as well.
-#[allow(dead_code, non_upper_case_globals)]
-mod window_level {
-    const kCGNumReservedWindowLevels: i32 = 16;
-    const kCGNumReservedBaseWindowLevels: i32 = 5;
-
-    pub const kCGBaseWindowLevel: i32 = i32::MIN;
-    pub const kCGMinimumWindowLevel: i32 = kCGBaseWindowLevel + kCGNumReservedBaseWindowLevels;
-    pub const kCGMaximumWindowLevel: i32 = i32::MAX - kCGNumReservedWindowLevels;
-
-    pub const kCGDesktopWindowLevel: i32 = kCGMinimumWindowLevel + 20;
-    pub const kCGDesktopIconWindowLevel: i32 = kCGDesktopWindowLevel + 20;
-    pub const kCGBackstopMenuLevel: i32 = -20;
-    pub const kCGNormalWindowLevel: i32 = 0;
-    pub const kCGFloatingWindowLevel: i32 = 3;
-    pub const kCGTornOffMenuWindowLevel: i32 = 3;
-    pub const kCGModalPanelWindowLevel: i32 = 8;
-    pub const kCGUtilityWindowLevel: i32 = 19;
-    pub const kCGDockWindowLevel: i32 = 20;
-    pub const kCGMainMenuWindowLevel: i32 = 24;
-    pub const kCGStatusWindowLevel: i32 = 25;
-    pub const kCGPopUpMenuWindowLevel: i32 = 101;
-    pub const kCGOverlayWindowLevel: i32 = 102;
-    pub const kCGHelpWindowLevel: i32 = 200;
-    pub const kCGDraggingWindowLevel: i32 = 500;
-    pub const kCGScreenSaverWindowLevel: i32 = 1000;
-    pub const kCGAssistiveTechHighWindowLevel: i32 = 1500;
-    pub const kCGCursorWindowLevel: i32 = kCGMaximumWindowLevel - 1;
-}
-
-pub use window_level::*;

src/platform_impl/macos/menu.rs

@@ -1,49 +1,36 @@
-use icrate::AppKit::{
-    NSApplication, NSEventModifierFlagCommand, NSEventModifierFlagOption, NSEventModifierFlags,
-    NSMenu, NSMenuItem,
-};
-use icrate::Foundation::{ns_string, MainThreadMarker, NSProcessInfo, NSString};
+use icrate::ns_string;
+use icrate::Foundation::{NSProcessInfo, NSString};
 use objc2::rc::Id;
 use objc2::runtime::Sel;
 use objc2::sel;
 
+use super::appkit::{NSApp, NSEventModifierFlags, NSMenu, NSMenuItem};
+
 struct KeyEquivalent<'a> {
     key: &'a NSString,
     masks: Option<NSEventModifierFlags>,
 }
 
-pub fn initialize(app: &NSApplication) {
-    let mtm = MainThreadMarker::from(app);
-    let menubar = NSMenu::new(mtm);
-    let app_menu_item = NSMenuItem::new(mtm);
+pub fn initialize() {
+    let menubar = NSMenu::new();
+    let app_menu_item = NSMenuItem::new();
     menubar.addItem(&app_menu_item);
 
-    let app_menu = NSMenu::new(mtm);
+    let app_menu = NSMenu::new();
     let process_name = NSProcessInfo::processInfo().processName();
 
     // About menu item
     let about_item_title = ns_string!("About ").stringByAppendingString(&process_name);
-    let about_item = menu_item(
-        mtm,
-        &about_item_title,
-        Some(sel!(orderFrontStandardAboutPanel:)),
-        None,
-    );
-
-    // Services menu item
-    let services_menu = NSMenu::new(mtm);
-    let services_item = menu_item(mtm, ns_string!("Services"), None, None);
-    services_item.setSubmenu(Some(&services_menu));
+    let about_item = menu_item(&about_item_title, sel!(orderFrontStandardAboutPanel:), None);
 
     // Seperator menu item
-    let sep_first = NSMenuItem::separatorItem(mtm);
+    let sep_first = NSMenuItem::separatorItem();
 
     // Hide application menu item
     let hide_item_title = ns_string!("Hide ").stringByAppendingString(&process_name);
     let hide_item = menu_item(
-        mtm,
         &hide_item_title,
-        Some(sel!(hide:)),
+        sel!(hide:),
         Some(KeyEquivalent {
             key: ns_string!("h"),
             masks: None,
@@ -53,33 +40,28 @@ pub fn initialize(app: &NSApplication) {
     // Hide other applications menu item
     let hide_others_item_title = ns_string!("Hide Others");
     let hide_others_item = menu_item(
-        mtm,
         hide_others_item_title,
-        Some(sel!(hideOtherApplications:)),
+        sel!(hideOtherApplications:),
         Some(KeyEquivalent {
             key: ns_string!("h"),
-            masks: Some(NSEventModifierFlagOption | NSEventModifierFlagCommand),
+            masks: Some(
+                NSEventModifierFlags::NSAlternateKeyMask | NSEventModifierFlags::NSCommandKeyMask,
+            ),
         }),
     );
 
     // Show applications menu item
     let show_all_item_title = ns_string!("Show All");
-    let show_all_item = menu_item(
-        mtm,
-        show_all_item_title,
-        Some(sel!(unhideAllApplications:)),
-        None,
-    );
+    let show_all_item = menu_item(show_all_item_title, sel!(unhideAllApplications:), None);
 
     // Seperator menu item
-    let sep = NSMenuItem::separatorItem(mtm);
+    let sep = NSMenuItem::separatorItem();
 
     // Quit application menu item
     let quit_item_title = ns_string!("Quit ").stringByAppendingString(&process_name);
     let quit_item = menu_item(
-        mtm,
         &quit_item_title,
-        Some(sel!(terminate:)),
+        sel!(terminate:),
         Some(KeyEquivalent {
             key: ns_string!("q"),
             masks: None,
@@ -88,31 +70,27 @@ pub fn initialize(app: &NSApplication) {
 
     app_menu.addItem(&about_item);
     app_menu.addItem(&sep_first);
-    app_menu.addItem(&services_item);
     app_menu.addItem(&hide_item);
     app_menu.addItem(&hide_others_item);
     app_menu.addItem(&show_all_item);
     app_menu.addItem(&sep);
     app_menu.addItem(&quit_item);
-    app_menu_item.setSubmenu(Some(&app_menu));
+    app_menu_item.setSubmenu(&app_menu);
 
-    unsafe { app.setServicesMenu(Some(&services_menu)) };
-    app.setMainMenu(Some(&menubar));
+    let app = NSApp();
+    app.setMainMenu(&menubar);
 }
 
 fn menu_item(
-    mtm: MainThreadMarker,
     title: &NSString,
-    selector: Option<Sel>,
+    selector: Sel,
     key_equivalent: Option<KeyEquivalent<'_>>,
 ) -> Id<NSMenuItem> {
     let (key, masks) = match key_equivalent {
         Some(ke) => (ke.key, ke.masks),
         None => (ns_string!(""), None),
     };
-    let item = unsafe {
-        NSMenuItem::initWithTitle_action_keyEquivalent(mtm.alloc(), title, selector, key)
-    };
+    let item = NSMenuItem::newWithTitle(title, selector, key);
     if let Some(masks) = masks {
         item.setKeyEquivalentModifierMask(masks)
     }

src/platform_impl/macos/mod.rs

@@ -4,7 +4,7 @@ mod util;
 mod app;
 mod app_delegate;
 mod app_state;
-mod cursor;
+mod appkit;
 mod event;
 mod event_loop;
 mod ffi;
@@ -27,9 +27,7 @@ pub(crate) use self::{
 };
 use crate::event::DeviceId as RootDeviceId;
 
-pub(crate) use self::cursor::CustomCursor as PlatformCustomCursor;
-pub(crate) use self::window::{OwnedWindowHandle, Window};
-pub(crate) use crate::cursor::OnlyCursorImageBuilder as PlatformCustomCursorBuilder;
+pub(crate) use self::window::Window;
 pub(crate) use crate::icon::NoIcon as PlatformIcon;
 pub(crate) use crate::platform_impl::Fullscreen;
 

src/platform_impl/macos/monitor.rs

@@ -10,10 +10,9 @@ use core_foundation::{
 use core_graphics::display::{
     CGDirectDisplayID, CGDisplay, CGDisplayBounds, CGDisplayCopyDisplayMode,
 };
-use icrate::AppKit::NSScreen;
-use icrate::Foundation::{ns_string, MainThreadMarker, NSNumber};
-use objc2::{rc::Id, runtime::AnyObject};
+use objc2::rc::Id;
 
+use super::appkit::NSScreen;
 use super::ffi;
 use crate::dpi::{PhysicalPosition, PhysicalSize};
 
@@ -211,12 +210,10 @@ impl MonitorHandle {
     }
 
     pub fn scale_factor(&self) -> f64 {
-        MainThreadMarker::run_on_main(|mtm| {
-            match self.ns_screen(mtm) {
-                Some(screen) => screen.backingScaleFactor() as f64,
-                None => 1.0, // default to 1.0 when we can't find the screen
-            }
-        })
+        match self.ns_screen() {
+            Some(screen) => screen.backingScaleFactor() as f64,
+            None => 1.0, // default to 1.0 when we can't find the screen
+        }
     }
 
     pub fn refresh_rate_millihertz(&self) -> Option<u32> {
@@ -306,10 +303,10 @@ impl MonitorHandle {
         }
     }
 
-    pub(crate) fn ns_screen(&self, mtm: MainThreadMarker) -> Option<Id<NSScreen>> {
+    pub(crate) fn ns_screen(&self) -> Option<Id<NSScreen>> {
         let uuid = unsafe { ffi::CGDisplayCreateUUIDFromDisplayID(self.0) };
-        NSScreen::screens(mtm).into_iter().find(|screen| {
-            let other_native_id = get_display_id(screen);
+        NSScreen::screens().into_iter().find(|screen| {
+            let other_native_id = screen.display_id();
             let other_uuid = unsafe {
                 ffi::CGDisplayCreateUUIDFromDisplayID(other_native_id as CGDirectDisplayID)
             };
@@ -317,25 +314,3 @@ impl MonitorHandle {
         })
     }
 }
-
-pub(crate) fn get_display_id(screen: &NSScreen) -> u32 {
-    let key = ns_string!("NSScreenNumber");
-
-    objc2::rc::autoreleasepool(|_| {
-        let device_description = screen.deviceDescription();
-
-        // Retrieve the CGDirectDisplayID associated with this screen
-        //
-        // SAFETY: The value from @"NSScreenNumber" in deviceDescription is guaranteed
-        // to be an NSNumber. See documentation for `deviceDescription` for details:
-        // <https://developer.apple.com/documentation/appkit/nsscreen/1388360-devicedescription?language=objc>
-        let obj = device_description
-            .get(key)
-            .expect("failed getting screen display id from device description");
-        let obj: *const AnyObject = obj;
-        let obj: *const NSNumber = obj.cast();
-        let obj: &NSNumber = unsafe { &*obj };
-
-        obj.as_u32()
-    })
-}

src/platform_impl/macos/observer.rs

@@ -21,7 +21,6 @@ use core_foundation::runloop::{
     CFRunLoopObserverRef, CFRunLoopRef, CFRunLoopTimerCreate, CFRunLoopTimerInvalidate,
     CFRunLoopTimerRef, CFRunLoopTimerSetNextFireDate,
 };
-use icrate::Foundation::MainThreadMarker;
 
 unsafe fn control_flow_handler<F>(panic_info: *mut c_void, f: F)
 where
@@ -37,8 +36,7 @@ where
     // However we want to keep that weak reference around after the function.
     std::mem::forget(info_from_raw);
 
-    let mtm = MainThreadMarker::new().unwrap();
-    stop_app_on_panic(mtm, Weak::clone(&panic_info), move || {
+    stop_app_on_panic(Weak::clone(&panic_info), move || {
         let _ = &panic_info;
         f(panic_info.0)
     });

src/platform_impl/macos/view.rs

@@ -1,27 +1,25 @@
 #![allow(clippy::unnecessary_cast)]
+use std::boxed::Box;
 use std::cell::{Cell, RefCell};
 use std::collections::{HashMap, VecDeque};
-use std::ptr;
+use std::ptr::NonNull;
 
-use icrate::AppKit::{
-    NSApplication, NSCursor, NSEvent, NSEventPhaseBegan, NSEventPhaseCancelled,
-    NSEventPhaseChanged, NSEventPhaseEnded, NSEventPhaseMayBegin, NSResponder, NSTextInputClient,
-    NSTrackingRectTag, NSView,
-};
 use icrate::Foundation::{
-    MainThreadMarker, NSArray, NSAttributedString, NSAttributedStringKey, NSCopying,
-    NSMutableAttributedString, NSObject, NSObjectProtocol, NSPoint, NSRange, NSRect, NSSize,
-    NSString, NSUInteger,
+    NSArray, NSAttributedString, NSAttributedStringKey, NSCopying, NSMutableAttributedString,
+    NSObject, NSObjectProtocol, NSPoint, NSRange, NSRect, NSSize, NSString, NSUInteger,
 };
+use objc2::declare::{Ivar, IvarDrop};
 use objc2::rc::{Id, WeakId};
 use objc2::runtime::{AnyObject, Sel};
-use objc2::{
-    class, declare_class, msg_send, msg_send_id, mutability, sel, ClassType, DeclaredClass,
-};
+use objc2::{class, declare_class, msg_send, msg_send_id, mutability, sel, ClassType};
 
-use super::cursor::{default_cursor, invisible_cursor};
-use super::event::{code_to_key, code_to_location};
-use super::event::{lalt_pressed, ralt_pressed};
+use super::{
+    appkit::{
+        NSApp, NSCursor, NSEvent, NSEventPhase, NSResponder, NSTextInputClient, NSTrackingRectTag,
+        NSView,
+    },
+    event::{code_to_key, code_to_location},
+};
 use crate::{
     dpi::{LogicalPosition, LogicalSize},
     event::{
@@ -51,7 +49,7 @@ impl Default for CursorState {
     fn default() -> Self {
         Self {
             visible: true,
-            cursor: default_cursor(),
+            cursor: Default::default(),
         }
     }
 }
@@ -142,50 +140,93 @@ pub struct ViewState {
 
     marked_text: RefCell<Id<NSMutableAttributedString>>,
     accepts_first_mouse: bool,
-
-    // Weak reference because the window keeps a strong reference to the view
-    _ns_window: WeakId<WinitWindow>,
 }
 
 declare_class!(
-    pub(super) struct WinitView;
+    #[derive(Debug)]
+    #[allow(non_snake_case)]
+    pub(super) struct WinitView {
+        // Weak reference because the window keeps a strong reference to the view
+        _ns_window: IvarDrop<Box<WeakId<WinitWindow>>, "__ns_window">,
+        state: IvarDrop<Box<ViewState>, "_state">,
+    }
+
+    mod ivars;
 
     unsafe impl ClassType for WinitView {
         #[inherits(NSResponder, NSObject)]
         type Super = NSView;
-        type Mutability = mutability::MainThreadOnly;
+        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitView";
     }
 
-    impl DeclaredClass for WinitView {
-        type Ivars = ViewState;
+    unsafe impl WinitView {
+        #[method(initWithId:acceptsFirstMouse:)]
+        unsafe fn init_with_id(
+            this: *mut Self,
+            window: &WinitWindow,
+            accepts_first_mouse: bool,
+        ) -> Option<NonNull<Self>> {
+            let this: Option<&mut Self> = unsafe { msg_send![super(this), init] };
+            this.map(|this| {
+                let state = ViewState {
+                    accepts_first_mouse,
+                    ..Default::default()
+                };
+
+                Ivar::write(
+                    &mut this._ns_window,
+                    Box::new(WeakId::new(&window.retain())),
+                );
+                Ivar::write(&mut this.state, Box::new(state));
+
+                this.setPostsFrameChangedNotifications(true);
+
+                let notification_center: &AnyObject =
+                    unsafe { msg_send![class!(NSNotificationCenter), defaultCenter] };
+                // About frame change
+                let frame_did_change_notification_name =
+                    NSString::from_str("NSViewFrameDidChangeNotification");
+                #[allow(clippy::let_unit_value)]
+                unsafe {
+                    let _: () = msg_send![
+                        notification_center,
+                        addObserver: &*this,
+                        selector: sel!(frameDidChange:),
+                        name: &*frame_did_change_notification_name,
+                        object: &*this,
+                    ];
+                }
+
+                *this.state.input_source.borrow_mut() = this.current_input_source();
+                NonNull::from(this)
+            })
+        }
     }
 
     unsafe impl WinitView {
         #[method(viewDidMoveToWindow)]
         fn view_did_move_to_window(&self) {
             trace_scope!("viewDidMoveToWindow");
-            if let Some(tracking_rect) = self.ivars().tracking_rect.take() {
+            if let Some(tracking_rect) = self.state.tracking_rect.take() {
                 self.removeTrackingRect(tracking_rect);
             }
 
             let rect = self.frame();
-            let tracking_rect = unsafe { self.addTrackingRect_owner_userData_assumeInside(rect, self, ptr::null_mut(), false) };
-            assert_ne!(tracking_rect, 0, "failed adding tracking rect");
-            self.ivars().tracking_rect.set(Some(tracking_rect));
+            let tracking_rect = self.add_tracking_rect(rect, false);
+            self.state.tracking_rect.set(Some(tracking_rect));
         }
 
         #[method(frameDidChange:)]
         fn frame_did_change(&self, _event: &NSEvent) {
             trace_scope!("frameDidChange:");
-            if let Some(tracking_rect) = self.ivars().tracking_rect.take() {
+            if let Some(tracking_rect) = self.state.tracking_rect.take() {
                 self.removeTrackingRect(tracking_rect);
             }
 
             let rect = self.frame();
-            let tracking_rect = unsafe { self.addTrackingRect_owner_userData_assumeInside(rect, self, ptr::null_mut(), false) };
-            assert_ne!(tracking_rect, 0, "failed adding tracking rect");
-            self.ivars().tracking_rect.set(Some(tracking_rect));
+            let tracking_rect = self.add_tracking_rect(rect, false);
+            self.state.tracking_rect.set(Some(tracking_rect));
 
             // Emit resize event here rather than from windowDidResize because:
             // 1. When a new window is created as a tab, the frame size may change without a window resize occurring.
@@ -200,7 +241,7 @@ declare_class!(
             trace_scope!("drawRect:");
 
             // It's a workaround for https://github.com/rust-windowing/winit/issues/2640, don't replace with `self.window_id()`.
-            if let Some(window) = self.ivars()._ns_window.load() {
+            if let Some(window) = self._ns_window.load() {
                 AppState::handle_redraw(WindowId(window.id()));
             }
 
@@ -229,12 +270,12 @@ declare_class!(
         fn reset_cursor_rects(&self) {
             trace_scope!("resetCursorRects");
             let bounds = self.bounds();
-            let cursor_state = self.ivars().cursor_state.borrow();
+            let cursor_state = self.state.cursor_state.borrow();
             // We correctly invoke `addCursorRect` only from inside `resetCursorRects`
             if cursor_state.visible {
-                self.addCursorRect_cursor(bounds, &cursor_state.cursor);
+                self.addCursorRect(bounds, &cursor_state.cursor);
             } else {
-                self.addCursorRect_cursor(bounds, &invisible_cursor());
+                self.addCursorRect(bounds, &NSCursor::invisible());
             }
         }
     }
@@ -243,13 +284,13 @@ declare_class!(
         #[method(hasMarkedText)]
         fn has_marked_text(&self) -> bool {
             trace_scope!("hasMarkedText");
-            self.ivars().marked_text.borrow().length() > 0
+            self.state.marked_text.borrow().length() > 0
         }
 
         #[method(markedRange)]
         fn marked_range(&self) -> NSRange {
             trace_scope!("markedRange");
-            let length = self.ivars().marked_text.borrow().length();
+            let length = self.state.marked_text.borrow().length();
             if length > 0 {
                 NSRange::new(0, length)
             } else {
@@ -292,19 +333,19 @@ declare_class!(
             };
 
             // Update marked text.
-            *self.ivars().marked_text.borrow_mut() = marked_text;
+            *self.state.marked_text.borrow_mut() = marked_text;
 
             // Notify IME is active if application still doesn't know it.
-            if self.ivars().ime_state.get() == ImeState::Disabled {
-                *self.ivars().input_source.borrow_mut() = self.current_input_source();
+            if self.state.ime_state.get() == ImeState::Disabled {
+                *self.state.input_source.borrow_mut() = self.current_input_source();
                 self.queue_event(WindowEvent::Ime(Ime::Enabled));
             }
 
-            if unsafe { self.hasMarkedText() } {
-                self.ivars().ime_state.set(ImeState::Preedit);
+            if self.hasMarkedText() {
+                self.state.ime_state.set(ImeState::Preedit);
             } else {
                 // In case the preedit was cleared, set IME into the Ground state.
-                self.ivars().ime_state.set(ImeState::Ground);
+                self.state.ime_state.set(ImeState::Ground);
             }
 
             // Empty string basically means that there's no preedit, so indicate that by sending
@@ -322,15 +363,15 @@ declare_class!(
         #[method(unmarkText)]
         fn unmark_text(&self) {
             trace_scope!("unmarkText");
-            *self.ivars().marked_text.borrow_mut() = NSMutableAttributedString::new();
+            *self.state.marked_text.borrow_mut() = NSMutableAttributedString::new();
 
             let input_context = self.inputContext().expect("input context");
             input_context.discardMarkedText();
 
             self.queue_event(WindowEvent::Ime(Ime::Preedit(String::new(), None)));
             if self.is_ime_enabled() {
-                // Leave the Preedit self.ivars()
-                self.ivars().ime_state.set(ImeState::Ground);
+                // Leave the Preedit self.state
+                self.state.ime_state.set(ImeState::Ground);
             } else {
                 warn!("Expected to have IME enabled when receiving unmarkText");
             }
@@ -369,9 +410,9 @@ declare_class!(
             let content_rect = window.contentRectForFrameRect(window.frame());
             let base_x = content_rect.origin.x as f64;
             let base_y = (content_rect.origin.y + content_rect.size.height) as f64;
-            let x = base_x + self.ivars().ime_position.get().x;
-            let y = base_y - self.ivars().ime_position.get().y;
-            let LogicalSize { width, height } = self.ivars().ime_size.get();
+            let x = base_x + self.state.ime_position.get().x;
+            let y = base_y - self.state.ime_position.get().y;
+            let LogicalSize { width, height } = self.state.ime_size.get();
             NSRect::new(NSPoint::new(x as _, y as _), NSSize::new(width, height))
         }
 
@@ -393,10 +434,10 @@ declare_class!(
             let is_control = string.chars().next().map_or(false, |c| c.is_control());
 
             // Commit only if we have marked text.
-            if unsafe { self.hasMarkedText() } && self.is_ime_enabled() && !is_control {
+            if self.hasMarkedText() && self.is_ime_enabled() && !is_control {
                 self.queue_event(WindowEvent::Ime(Ime::Preedit(String::new(), None)));
                 self.queue_event(WindowEvent::Ime(Ime::Commit(string)));
-                self.ivars().ime_state.set(ImeState::Commited);
+                self.state.ime_state.set(ImeState::Commited);
             }
         }
 
@@ -408,15 +449,15 @@ declare_class!(
             // We shouldn't forward any character from just commited text, since we'll end up sending
             // it twice with some IMEs like Korean one. We'll also always send `Enter` in that case,
             // which is not desired given it was used to confirm IME input.
-            if self.ivars().ime_state.get() == ImeState::Commited {
+            if self.state.ime_state.get() == ImeState::Commited {
                 return;
             }
 
-            self.ivars().forward_key_to_app.set(true);
+            self.state.forward_key_to_app.set(true);
 
-            if unsafe { self.hasMarkedText() } && self.ivars().ime_state.get() == ImeState::Preedit {
+            if self.hasMarkedText() && self.state.ime_state.get() == ImeState::Preedit {
                 // Leave preedit so that we also report the key-up for this key.
-                self.ivars().ime_state.set(ImeState::Ground);
+                self.state.ime_state.set(ImeState::Ground);
             }
         }
     }
@@ -426,19 +467,19 @@ declare_class!(
         fn key_down(&self, event: &NSEvent) {
             trace_scope!("keyDown:");
             {
-                let mut prev_input_source = self.ivars().input_source.borrow_mut();
+                let mut prev_input_source = self.state.input_source.borrow_mut();
                 let current_input_source = self.current_input_source();
                 if *prev_input_source != current_input_source && self.is_ime_enabled() {
                     *prev_input_source = current_input_source;
                     drop(prev_input_source);
-                    self.ivars().ime_state.set(ImeState::Disabled);
+                    self.state.ime_state.set(ImeState::Disabled);
                     self.queue_event(WindowEvent::Ime(Ime::Disabled));
                 }
             }
 
             // Get the characters from the event.
-            let old_ime_state = self.ivars().ime_state.get();
-            self.ivars().forward_key_to_app.set(false);
+            let old_ime_state = self.state.ime_state.get();
+            self.state.forward_key_to_app.set(false);
             let event = replace_event(event, self.window().option_as_alt());
 
             // The `interpretKeyEvents` function might call
@@ -447,32 +488,32 @@ declare_class!(
             // we must send the `KeyboardInput` event during IME if it triggered
             // `doCommandBySelector`. (doCommandBySelector means that the keyboard input
             // is not handled by IME and should be handled by the application)
-            if self.ivars().ime_allowed.get() {
+            if self.state.ime_allowed.get() {
                 let events_for_nsview = NSArray::from_slice(&[&*event]);
                 unsafe { self.interpretKeyEvents(&events_for_nsview) };
 
                 // If the text was commited we must treat the next keyboard event as IME related.
-                if self.ivars().ime_state.get() == ImeState::Commited {
+                if self.state.ime_state.get() == ImeState::Commited {
                     // Remove any marked text, so normal input can continue.
-                    *self.ivars().marked_text.borrow_mut() = NSMutableAttributedString::new();
+                    *self.state.marked_text.borrow_mut() = NSMutableAttributedString::new();
                 }
             }
 
             self.update_modifiers(&event, false);
 
-            let had_ime_input = match self.ivars().ime_state.get() {
+            let had_ime_input = match self.state.ime_state.get() {
                 ImeState::Commited => {
                     // Allow normal input after the commit.
-                    self.ivars().ime_state.set(ImeState::Ground);
+                    self.state.ime_state.set(ImeState::Ground);
                     true
                 }
                 ImeState::Preedit => true,
                 // `key_down` could result in preedit clear, so compare old and current state.
-                _ => old_ime_state != self.ivars().ime_state.get(),
+                _ => old_ime_state != self.state.ime_state.get(),
             };
 
-            if !had_ime_input || self.ivars().forward_key_to_app.get() {
-                let key_event = create_key_event(&event, true, unsafe { event.isARepeat() }, None);
+            if !had_ime_input || self.state.forward_key_to_app.get() {
+                let key_event = create_key_event(&event, true, event.is_a_repeat(), None);
                 self.queue_event(WindowEvent::KeyboardInput {
                     device_id: DEVICE_ID,
                     event: key_event,
@@ -490,7 +531,7 @@ declare_class!(
 
             // We want to send keyboard input when we are currently in the ground state.
             if matches!(
-                self.ivars().ime_state.get(),
+                self.state.ime_state.get(),
                 ImeState::Ground | ImeState::Disabled
             ) {
                 self.queue_event(WindowEvent::KeyboardInput {
@@ -534,15 +575,14 @@ declare_class!(
         // https://bugs.eclipse.org/bugs/show_bug.cgi?id=300620#c6
         #[method(cancelOperation:)]
         fn cancel_operation(&self, _sender: Option<&AnyObject>) {
-            let mtm = MainThreadMarker::from(self);
             trace_scope!("cancelOperation:");
 
-            let event = NSApplication::sharedApplication(mtm)
+            let event = NSApp()
                 .currentEvent()
                 .expect("could not find current event");
 
             self.update_modifiers(&event, false);
-            let event = create_key_event(&event, true, unsafe { event.isARepeat() }, None);
+            let event = create_key_event(&event, true, event.is_a_repeat(), None);
 
             self.queue_event(WindowEvent::KeyboardInput {
                 device_id: DEVICE_ID,
@@ -639,8 +679,8 @@ declare_class!(
             self.mouse_motion(event);
 
             let delta = {
-                let (x, y) = unsafe { (event.scrollingDeltaX(), event.scrollingDeltaY()) };
-                if unsafe { event.hasPreciseScrollingDeltas() } {
+                let (x, y) = (event.scrollingDeltaX(), event.scrollingDeltaY());
+                if event.hasPreciseScrollingDeltas() {
                     let delta = LogicalPosition::new(x, y).to_physical(self.scale_factor());
                     MouseScrollDelta::PixelDelta(delta)
                 } else {
@@ -652,19 +692,18 @@ declare_class!(
             // be mutually exclusive anyhow, which is why the API is rather incoherent). If no momentum
             // phase is recorded (or rather, the started/ended cases of the momentum phase) then we
             // report the touch phase.
-            #[allow(non_upper_case_globals)]
-            let phase = match unsafe { event.momentumPhase() } {
-                NSEventPhaseMayBegin | NSEventPhaseBegan => {
+            let phase = match event.momentumPhase() {
+                NSEventPhase::NSEventPhaseMayBegin | NSEventPhase::NSEventPhaseBegan => {
                     TouchPhase::Started
                 }
-                NSEventPhaseEnded | NSEventPhaseCancelled => {
+                NSEventPhase::NSEventPhaseEnded | NSEventPhase::NSEventPhaseCancelled => {
                     TouchPhase::Ended
                 }
-                _ => match unsafe { event.phase() } {
-                    NSEventPhaseMayBegin | NSEventPhaseBegan => {
+                _ => match event.phase() {
+                    NSEventPhase::NSEventPhaseMayBegin | NSEventPhase::NSEventPhaseBegan => {
                         TouchPhase::Started
                     }
-                    NSEventPhaseEnded | NSEventPhaseCancelled => {
+                    NSEventPhase::NSEventPhaseEnded | NSEventPhase::NSEventPhaseCancelled => {
                         TouchPhase::Ended
                     }
                     _ => TouchPhase::Moved,
@@ -685,18 +724,17 @@ declare_class!(
         fn magnify_with_event(&self, event: &NSEvent) {
             trace_scope!("magnifyWithEvent:");
 
-            #[allow(non_upper_case_globals)]
-            let phase = match unsafe { event.phase() } {
-                NSEventPhaseBegan => TouchPhase::Started,
-                NSEventPhaseChanged => TouchPhase::Moved,
-                NSEventPhaseCancelled => TouchPhase::Cancelled,
-                NSEventPhaseEnded => TouchPhase::Ended,
+            let phase = match event.phase() {
+                NSEventPhase::NSEventPhaseBegan => TouchPhase::Started,
+                NSEventPhase::NSEventPhaseChanged => TouchPhase::Moved,
+                NSEventPhase::NSEventPhaseCancelled => TouchPhase::Cancelled,
+                NSEventPhase::NSEventPhaseEnded => TouchPhase::Ended,
                 _ => return,
             };
 
             self.queue_event(WindowEvent::TouchpadMagnify {
                 device_id: DEVICE_ID,
-                delta: unsafe { event.magnification() },
+                delta: event.magnification(),
                 phase,
             });
         }
@@ -714,18 +752,17 @@ declare_class!(
         fn rotate_with_event(&self, event: &NSEvent) {
             trace_scope!("rotateWithEvent:");
 
-            #[allow(non_upper_case_globals)]
-            let phase = match unsafe { event.phase() } {
-                NSEventPhaseBegan => TouchPhase::Started,
-                NSEventPhaseChanged => TouchPhase::Moved,
-                NSEventPhaseCancelled => TouchPhase::Cancelled,
-                NSEventPhaseEnded => TouchPhase::Ended,
+            let phase = match event.phase() {
+                NSEventPhase::NSEventPhaseBegan => TouchPhase::Started,
+                NSEventPhase::NSEventPhaseChanged => TouchPhase::Moved,
+                NSEventPhase::NSEventPhaseCancelled => TouchPhase::Cancelled,
+                NSEventPhase::NSEventPhaseEnded => TouchPhase::Ended,
                 _ => return,
             };
 
             self.queue_event(WindowEvent::TouchpadRotate {
                 device_id: DEVICE_ID,
-                delta: unsafe { event.rotation() },
+                delta: event.rotation(),
                 phase,
             });
         }
@@ -738,8 +775,8 @@ declare_class!(
 
             self.queue_event(WindowEvent::TouchpadPressure {
                 device_id: DEVICE_ID,
-                pressure: unsafe { event.pressure() },
-                stage: unsafe { event.stage() } as i64,
+                pressure: event.pressure(),
+                stage: event.stage() as i64,
             });
         }
 
@@ -755,41 +792,20 @@ declare_class!(
         #[method(acceptsFirstMouse:)]
         fn accepts_first_mouse(&self, _event: &NSEvent) -> bool {
             trace_scope!("acceptsFirstMouse:");
-            self.ivars().accepts_first_mouse
+            self.state.accepts_first_mouse
         }
     }
 );
 
 impl WinitView {
     pub(super) fn new(window: &WinitWindow, accepts_first_mouse: bool) -> Id<Self> {
-        let mtm = MainThreadMarker::from(window);
-        let this = mtm.alloc().set_ivars(ViewState {
-            accepts_first_mouse,
-            _ns_window: WeakId::new(&window.retain()),
-            ..Default::default()
-        });
-        let this: Id<Self> = unsafe { msg_send_id![super(this), init] };
-
-        this.setPostsFrameChangedNotifications(true);
-        let notification_center: &AnyObject =
-            unsafe { msg_send![class!(NSNotificationCenter), defaultCenter] };
-        // About frame change
-        let frame_did_change_notification_name =
-            NSString::from_str("NSViewFrameDidChangeNotification");
-        #[allow(clippy::let_unit_value)]
         unsafe {
-            let _: () = msg_send![
-                notification_center,
-                addObserver: &*this,
-                selector: sel!(frameDidChange:),
-                name: &*frame_did_change_notification_name,
-                object: &*this,
-            ];
+            msg_send_id![
+                Self::alloc(),
+                initWithId: window,
+                acceptsFirstMouse: accepts_first_mouse,
+            ]
         }
-
-        *this.ivars().input_source.borrow_mut() = this.current_input_source();
-
-        this
     }
 
     fn window(&self) -> Id<WinitWindow> {
@@ -798,10 +814,7 @@ impl WinitView {
         // (which is incompatible with `frameDidChange:`)
         //
         // unsafe { msg_send_id![self, window] }
-        self.ivars()
-            ._ns_window
-            .load()
-            .expect("view to have a window")
+        self._ns_window.load().expect("view to have a window")
     }
 
     fn window_id(&self) -> WindowId {
@@ -829,7 +842,7 @@ impl WinitView {
     }
 
     fn is_ime_enabled(&self) -> bool {
-        !matches!(self.ivars().ime_state.get(), ImeState::Disabled)
+        !matches!(self.state.ime_state.get(), ImeState::Disabled)
     }
 
     fn current_input_source(&self) -> String {
@@ -841,7 +854,7 @@ impl WinitView {
     }
 
     pub(super) fn set_cursor_icon(&self, icon: Id<NSCursor>) {
-        let mut cursor_state = self.ivars().cursor_state.borrow_mut();
+        let mut cursor_state = self.state.cursor_state.borrow_mut();
         cursor_state.cursor = icon;
     }
 
@@ -849,7 +862,7 @@ impl WinitView {
     ///
     /// Returns whether the state changed.
     pub(super) fn set_cursor_visible(&self, visible: bool) -> bool {
-        let mut cursor_state = self.ivars().cursor_state.borrow_mut();
+        let mut cursor_state = self.state.cursor_state.borrow_mut();
         if visible != cursor_state.visible {
             cursor_state.visible = visible;
             true
@@ -859,19 +872,19 @@ impl WinitView {
     }
 
     pub(super) fn set_ime_allowed(&self, ime_allowed: bool) {
-        if self.ivars().ime_allowed.get() == ime_allowed {
+        if self.state.ime_allowed.get() == ime_allowed {
             return;
         }
-        self.ivars().ime_allowed.set(ime_allowed);
-        if self.ivars().ime_allowed.get() {
+        self.state.ime_allowed.set(ime_allowed);
+        if self.state.ime_allowed.get() {
             return;
         }
 
         // Clear markedText
-        *self.ivars().marked_text.borrow_mut() = NSMutableAttributedString::new();
+        *self.state.marked_text.borrow_mut() = NSMutableAttributedString::new();
 
-        if self.ivars().ime_state.get() != ImeState::Disabled {
-            self.ivars().ime_state.set(ImeState::Disabled);
+        if self.state.ime_state.get() != ImeState::Disabled {
+            self.state.ime_state.set(ImeState::Disabled);
             self.queue_event(WindowEvent::Ime(Ime::Disabled));
         }
     }
@@ -881,17 +894,17 @@ impl WinitView {
         position: LogicalPosition<f64>,
         size: LogicalSize<f64>,
     ) {
-        self.ivars().ime_position.set(position);
-        self.ivars().ime_size.set(size);
+        self.state.ime_position.set(position);
+        self.state.ime_size.set(size);
         let input_context = self.inputContext().expect("input context");
         input_context.invalidateCharacterCoordinates();
     }
 
     /// Reset modifiers and emit a synthetic ModifiersChanged event if deemed necessary.
     pub(super) fn reset_modifiers(&self) {
-        if !self.ivars().modifiers.get().state().is_empty() {
-            self.ivars().modifiers.set(Modifiers::default());
-            self.queue_event(WindowEvent::ModifiersChanged(self.ivars().modifiers.get()));
+        if !self.state.modifiers.get().state().is_empty() {
+            self.state.modifiers.set(Modifiers::default());
+            self.queue_event(WindowEvent::ModifiersChanged(self.state.modifiers.get()));
         }
     }
 
@@ -900,8 +913,8 @@ impl WinitView {
         use ElementState::{Pressed, Released};
 
         let current_modifiers = event_mods(ns_event);
-        let prev_modifiers = self.ivars().modifiers.get();
-        self.ivars().modifiers.set(current_modifiers);
+        let prev_modifiers = self.state.modifiers.get();
+        self.state.modifiers.set(current_modifiers);
 
         // This function was called form the flagsChanged event, which is triggered
         // when the user presses/releases a modifier even if the same kind of modifier
@@ -912,8 +925,8 @@ impl WinitView {
         // later will work though, since the flags are attached to the event and contain valid
         // information.
         'send_event: {
-            if is_flags_changed_event && unsafe { ns_event.keyCode() } != 0 {
-                let scancode = unsafe { ns_event.keyCode() };
+            if is_flags_changed_event && ns_event.key_code() != 0 {
+                let scancode = ns_event.key_code();
                 let physical_key = PhysicalKey::from_scancode(scancode as u32);
 
                 // We'll correct the `is_press` later.
@@ -930,7 +943,7 @@ impl WinitView {
                 event.location = code_to_location(physical_key);
                 let location_mask = ModLocationMask::from_location(event.location);
 
-                let mut phys_mod_state = self.ivars().phys_modifiers.borrow_mut();
+                let mut phys_mod_state = self.state.phys_modifiers.borrow_mut();
                 let phys_mod = phys_mod_state
                     .entry(key)
                     .or_insert(ModLocationMask::empty());
@@ -1008,7 +1021,7 @@ impl WinitView {
             return;
         }
 
-        self.queue_event(WindowEvent::ModifiersChanged(self.ivars().modifiers.get()));
+        self.queue_event(WindowEvent::ModifiersChanged(self.state.modifiers.get()));
     }
 
     fn mouse_click(&self, event: &NSEvent, button_state: ElementState) {
@@ -1024,7 +1037,7 @@ impl WinitView {
     }
 
     fn mouse_motion(&self, event: &NSEvent) {
-        let window_point = unsafe { event.locationInWindow() };
+        let window_point = event.locationInWindow();
         let view_point = self.convertPoint_fromView(window_point, None);
         let view_rect = self.frame();
 
@@ -1033,7 +1046,7 @@ impl WinitView {
             || view_point.x > view_rect.size.width
             || view_point.y > view_rect.size.height
         {
-            let mouse_buttons_down = unsafe { NSEvent::pressedMouseButtons() };
+            let mouse_buttons_down = NSEvent::pressedMouseButtons();
             if mouse_buttons_down == 0 {
                 // Point is outside of the client area (view) and no buttons are pressed
                 return;
@@ -1060,7 +1073,7 @@ fn mouse_button(event: &NSEvent) -> MouseButton {
     // For the other events, it's always set to 0.
     // MacOS only defines the left, right and middle buttons, 3..=31 are left as generic buttons,
     // but 3 and 4 are very commonly used as Back and Forward by hardware vendors and applications.
-    match unsafe { event.buttonNumber() } {
+    match event.buttonNumber() {
         0 => MouseButton::Left,
         1 => MouseButton::Right,
         2 => MouseButton::Middle,
@@ -1076,35 +1089,30 @@ fn mouse_button(event: &NSEvent) -> MouseButton {
 fn replace_event(event: &NSEvent, option_as_alt: OptionAsAlt) -> Id<NSEvent> {
     let ev_mods = event_mods(event).state;
     let ignore_alt_characters = match option_as_alt {
-        OptionAsAlt::OnlyLeft if lalt_pressed(event) => true,
-        OptionAsAlt::OnlyRight if ralt_pressed(event) => true,
+        OptionAsAlt::OnlyLeft if event.lalt_pressed() => true,
+        OptionAsAlt::OnlyRight if event.ralt_pressed() => true,
         OptionAsAlt::Both if ev_mods.alt_key() => true,
         _ => false,
     } && !ev_mods.control_key()
         && !ev_mods.super_key();
 
     if ignore_alt_characters {
-        let ns_chars = unsafe {
-            event
-                .charactersIgnoringModifiers()
-                .expect("expected characters to be non-null")
-        };
+        let ns_chars = event
+            .charactersIgnoringModifiers()
+            .expect("expected characters to be non-null");
 
-        unsafe {
-            NSEvent::keyEventWithType_location_modifierFlags_timestamp_windowNumber_context_characters_charactersIgnoringModifiers_isARepeat_keyCode(
-                event.r#type(),
-                event.locationInWindow(),
-                event.modifierFlags(),
-                event.timestamp(),
-                event.windowNumber(),
-                None,
-                &ns_chars,
-                &ns_chars,
-                event.isARepeat(),
-                event.keyCode(),
-            )
-            .unwrap()
-        }
+        NSEvent::keyEventWithType(
+            event.type_(),
+            event.locationInWindow(),
+            event.modifierFlags(),
+            event.timestamp(),
+            event.window_number(),
+            None,
+            &ns_chars,
+            &ns_chars,
+            event.is_a_repeat(),
+            event.key_code(),
+        )
     } else {
         event.copy()
     }

src/platform_impl/macos/window.rs

@@ -3,6 +3,8 @@
 use std::collections::VecDeque;
 use std::f64;
 use std::ops;
+use std::os::raw::c_void;
+use std::ptr::NonNull;
 use std::sync::{Mutex, MutexGuard};
 
 use crate::{
@@ -15,13 +17,14 @@ use crate::{
     platform::macos::{OptionAsAlt, WindowExtMacOS},
     platform_impl::platform::{
         app_state::AppState,
+        appkit::NSWindowOrderingMode,
         event_loop::EventLoopWindowTarget,
         ffi,
         monitor::{self, MonitorHandle, VideoMode},
         util,
         view::WinitView,
         window_delegate::WinitWindowDelegate,
-        Fullscreen, OsError, PlatformCustomCursor,
+        Fullscreen, OsError,
     },
     window::{
         CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme, UserAttentionType,
@@ -29,30 +32,22 @@ use crate::{
     },
 };
 use core_graphics::display::{CGDisplay, CGPoint};
-use icrate::AppKit::{
-    NSAppKitVersionNumber, NSAppKitVersionNumber10_12, NSAppearance, NSApplication,
-    NSApplicationPresentationAutoHideDock, NSApplicationPresentationAutoHideMenuBar,
-    NSApplicationPresentationFullScreen, NSApplicationPresentationHideDock,
-    NSApplicationPresentationHideMenuBar, NSApplicationPresentationOptions, NSBackingStoreBuffered,
-    NSColor, NSCriticalRequest, NSFilenamesPboardType, NSInformationalRequest, NSResponder,
-    NSScreen, NSView, NSWindow, NSWindowAbove, NSWindowCloseButton, NSWindowFullScreenButton,
-    NSWindowLevel, NSWindowMiniaturizeButton, NSWindowSharingNone, NSWindowSharingReadOnly,
-    NSWindowStyleMask, NSWindowStyleMaskBorderless, NSWindowStyleMaskClosable,
-    NSWindowStyleMaskFullSizeContentView, NSWindowStyleMaskMiniaturizable,
-    NSWindowStyleMaskResizable, NSWindowStyleMaskTitled, NSWindowTabbingModePreferred,
-    NSWindowTitleHidden, NSWindowZoomButton,
-};
 use icrate::Foundation::{
-    CGFloat, MainThreadBound, MainThreadMarker, NSArray, NSCopying, NSObject, NSPoint, NSRect,
-    NSSize, NSString,
+    CGFloat, MainThreadBound, MainThreadMarker, NSArray, NSCopying, NSInteger, NSObject, NSPoint,
+    NSRect, NSSize, NSString,
 };
+use objc2::declare::{Ivar, IvarDrop};
 use objc2::rc::{autoreleasepool, Id};
-use objc2::{declare_class, msg_send, msg_send_id, mutability, sel, ClassType, DeclaredClass};
+use objc2::{declare_class, msg_send, msg_send_id, mutability, sel, ClassType};
 
-use super::cursor::cursor_from_icon;
-use super::ffi::kCGFloatingWindowLevel;
-use super::ffi::{kCGNormalWindowLevel, CGSMainConnectionID, CGSSetWindowBackgroundBlurRadius};
-use super::monitor::get_display_id;
+use super::appkit::{
+    NSApp, NSAppKitVersion, NSAppearance, NSApplicationPresentationOptions, NSBackingStoreType,
+    NSColor, NSCursor, NSFilenamesPboardType, NSRequestUserAttentionType, NSResponder, NSScreen,
+    NSView, NSWindow, NSWindowButton, NSWindowLevel, NSWindowSharingType, NSWindowStyleMask,
+    NSWindowTabbingMode, NSWindowTitleVisibility,
+};
+use super::ffi::CGSMainConnectionID;
+use super::ffi::CGSSetWindowBackgroundBlurRadius;
 
 pub(crate) struct Window {
     window: MainThreadBound<Id<WinitWindow>>,
@@ -63,7 +58,7 @@ pub(crate) struct Window {
 impl Drop for Window {
     fn drop(&mut self) {
         self.window
-            .get_on_main(|window| autoreleasepool(|_| window.close()))
+            .get_on_main(|window, _| autoreleasepool(|_| window.close()))
     }
 }
 
@@ -75,8 +70,7 @@ impl Window {
     ) -> Result<Self, RootOsError> {
         let mtm = MainThreadMarker::new()
             .expect("windows can only be created on the main thread on macOS");
-        let (window, _delegate) =
-            autoreleasepool(|_| WinitWindow::new(attributes, pl_attribs, mtm))?;
+        let (window, _delegate) = autoreleasepool(|_| WinitWindow::new(attributes, pl_attribs))?;
         Ok(Window {
             window: MainThreadBound::new(window, mtm),
             _delegate: MainThreadBound::new(_delegate, mtm),
@@ -92,19 +86,7 @@ impl Window {
         &self,
         f: impl FnOnce(&WinitWindow) -> R + Send,
     ) -> R {
-        self.window.get_on_main(|window| f(window))
-    }
-
-    #[cfg(feature = "rwh_06")]
-    #[inline]
-    pub(crate) fn raw_window_handle_rwh_06(
-        &self,
-    ) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
-        if let Some(mtm) = MainThreadMarker::new() {
-            Ok(self.window.get(mtm).raw_window_handle_rwh_06())
-        } else {
-            Err(rwh_06::HandleError::Unavailable)
-        }
+        self.window.get_on_main(|window, _mtm| f(window))
     }
 }
 
@@ -129,54 +111,6 @@ impl From<u64> for WindowId {
     }
 }
 
-#[derive(Debug)]
-pub(crate) struct OwnedWindowHandle {
-    ns_view: MainThreadBound<Id<NSView>>,
-}
-
-impl Clone for OwnedWindowHandle {
-    fn clone(&self) -> Self {
-        Self {
-            ns_view: MainThreadMarker::run_on_main(|mtm| {
-                MainThreadBound::new(self.ns_view.get(mtm).clone(), mtm)
-            }),
-        }
-    }
-}
-
-impl OwnedWindowHandle {
-    #[cfg(feature = "rwh_06")]
-    pub(crate) fn new_parent_window(handle: rwh_06::WindowHandle<'_>) -> Self {
-        let mtm =
-            MainThreadMarker::new().expect("can only have handles on macOS on the main thread");
-        let ns_view = match handle.as_raw() {
-            rwh_06::RawWindowHandle::AppKit(handle) => {
-                // SAFETY: Taking `WindowHandle<'_>` ensures that the pointer is valid.
-                // Unwrap is fine, since the pointer comes from `NonNull`.
-                unsafe { Id::retain(handle.ns_view.as_ptr().cast()) }.unwrap()
-            }
-            handle => panic!("invalid window handle {handle:?} on macOS"),
-        };
-        Self {
-            ns_view: MainThreadBound::new(ns_view, mtm),
-        }
-    }
-
-    #[cfg(feature = "rwh_06")]
-    pub(crate) fn raw_window_handle(&self) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
-        if let Some(mtm) = MainThreadMarker::new() {
-            let window_handle = rwh_06::AppKitWindowHandle::new({
-                let ptr = Id::as_ptr(self.ns_view.get(mtm)) as *mut _;
-                std::ptr::NonNull::new(ptr).expect("Id<T> should never be null")
-            });
-            let handle = rwh_06::RawWindowHandle::AppKit(window_handle);
-            Ok(handle)
-        } else {
-            Err(rwh_06::HandleError::Unavailable)
-        }
-    }
-}
-
 #[derive(Clone)]
 pub struct PlatformSpecificWindowBuilderAttributes {
     pub movable_by_window_background: bool,
@@ -213,17 +147,52 @@ impl Default for PlatformSpecificWindowBuilderAttributes {
 
 declare_class!(
     #[derive(Debug)]
-    pub struct WinitWindow;
+    pub struct WinitWindow {
+        // TODO: Fix unnecessary boxing here
+        shared_state: IvarDrop<Box<Mutex<SharedState>>, "_shared_state">,
+    }
+
+    mod ivars;
 
     unsafe impl ClassType for WinitWindow {
         #[inherits(NSResponder, NSObject)]
         type Super = NSWindow;
-        type Mutability = mutability::MainThreadOnly;
+        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitWindow";
     }
 
-    impl DeclaredClass for WinitWindow {
-        type Ivars = Mutex<SharedState>;
+    unsafe impl WinitWindow {
+        #[method(initWithContentRect:styleMask:state:)]
+        unsafe fn init(
+            this: *mut Self,
+            frame: NSRect,
+            mask: NSWindowStyleMask,
+            state: *mut c_void,
+        ) -> Option<NonNull<Self>> {
+            let this: Option<&mut Self> = unsafe {
+                msg_send![
+                    super(this),
+                    initWithContentRect: frame,
+                    styleMask: mask,
+                    backing: NSBackingStoreType::NSBackingStoreBuffered,
+                    defer: false,
+                ]
+            };
+
+            this.map(|this| {
+                // SAFETY: The pointer originally came from `Box::into_raw`.
+                Ivar::write(&mut this.shared_state, unsafe {
+                    Box::from_raw(state as *mut Mutex<SharedState>)
+                });
+
+                // It is imperative to correct memory management that we
+                // disable the extra release that would otherwise happen when
+                // calling `clone` on the window.
+                this.setReleasedWhenClosed(false);
+
+                NonNull::from(this)
+            })
+        }
     }
 
     unsafe impl WinitWindow {
@@ -324,7 +293,6 @@ impl WinitWindow {
     fn new(
         attrs: WindowAttributes,
         pl_attrs: PlatformSpecificWindowBuilderAttributes,
-        mtm: MainThreadMarker,
     ) -> Result<(Id<Self>, Id<WinitWindowDelegate>), RootOsError> {
         trace_scope!("WinitWindow::new");
 
@@ -332,15 +300,15 @@ impl WinitWindow {
             let screen = match attrs.fullscreen.0.clone().map(Into::into) {
                 Some(Fullscreen::Borderless(Some(monitor)))
                 | Some(Fullscreen::Exclusive(VideoMode { monitor, .. })) => {
-                    monitor.ns_screen(mtm).or_else(|| NSScreen::mainScreen(mtm))
+                    monitor.ns_screen().or_else(NSScreen::main)
                 }
-                Some(Fullscreen::Borderless(None)) => NSScreen::mainScreen(mtm),
+                Some(Fullscreen::Borderless(None)) => NSScreen::main(),
                 None => None,
             };
             let frame = match &screen {
                 Some(screen) => screen.frame(),
                 None => {
-                    let scale_factor = NSScreen::mainScreen(mtm)
+                    let scale_factor = NSScreen::main()
                         .map(|screen| screen.backingScaleFactor() as f64)
                         .unwrap_or(1.0);
                     let (width, height) = match attrs.inner_size {
@@ -370,31 +338,31 @@ impl WinitWindow {
                 // if decorations is set to false, ignore pl_attrs
                 //
                 // if the titlebar is hidden, ignore other pl_attrs
-                NSWindowStyleMaskBorderless
-                    | NSWindowStyleMaskResizable
-                    | NSWindowStyleMaskMiniaturizable
+                NSWindowStyleMask::NSBorderlessWindowMask
+                    | NSWindowStyleMask::NSResizableWindowMask
+                    | NSWindowStyleMask::NSMiniaturizableWindowMask
             } else {
                 // default case, resizable window with titlebar and titlebar buttons
-                NSWindowStyleMaskClosable
-                    | NSWindowStyleMaskMiniaturizable
-                    | NSWindowStyleMaskResizable
-                    | NSWindowStyleMaskTitled
+                NSWindowStyleMask::NSClosableWindowMask
+                    | NSWindowStyleMask::NSMiniaturizableWindowMask
+                    | NSWindowStyleMask::NSResizableWindowMask
+                    | NSWindowStyleMask::NSTitledWindowMask
             };
 
             if !attrs.resizable {
-                masks &= !NSWindowStyleMaskResizable;
+                masks &= !NSWindowStyleMask::NSResizableWindowMask;
             }
 
             if !attrs.enabled_buttons.contains(WindowButtons::MINIMIZE) {
-                masks &= !NSWindowStyleMaskMiniaturizable;
+                masks &= !NSWindowStyleMask::NSMiniaturizableWindowMask;
             }
 
             if !attrs.enabled_buttons.contains(WindowButtons::CLOSE) {
-                masks &= !NSWindowStyleMaskClosable;
+                masks &= !NSWindowStyleMask::NSClosableWindowMask;
             }
 
             if pl_attrs.fullsize_content_view {
-                masks |= NSWindowStyleMaskFullSizeContentView;
+                masks |= NSWindowStyleMask::NSFullSizeContentViewWindowMask;
             }
 
             let state = SharedState {
@@ -404,23 +372,18 @@ impl WinitWindow {
                 ..Default::default()
             };
 
-            let this = mtm.alloc().set_ivars(Mutex::new(state));
+            // Pass the state through FFI to the method declared on the class
+            let state_ptr: *mut c_void = Box::into_raw(Box::new(Mutex::new(state))).cast();
             let this: Option<Id<Self>> = unsafe {
                 msg_send_id![
-                    super(this),
+                    WinitWindow::alloc(),
                     initWithContentRect: frame,
                     styleMask: masks,
-                    backing: NSBackingStoreBuffered,
-                    defer: false,
+                    state: state_ptr,
                 ]
             };
             let this = this?;
 
-            // It is very important for correct memory management that we
-            // disable the extra release that would otherwise happen when
-            // calling `close` on the window.
-            unsafe { this.setReleasedWhenClosed(false) };
-
             let resize_increments = match attrs
                 .resize_increments
                 .map(|i| i.to_logical::<f64>(this.scale_factor()))
@@ -438,26 +401,26 @@ impl WinitWindow {
 
             if let Some(identifier) = pl_attrs.tabbing_identifier {
                 this.setTabbingIdentifier(&NSString::from_str(&identifier));
-                this.setTabbingMode(NSWindowTabbingModePreferred);
+                this.setTabbingMode(NSWindowTabbingMode::NSWindowTabbingModePreferred);
             }
 
             if attrs.content_protected {
-                this.setSharingType(NSWindowSharingNone);
+                this.setSharingType(NSWindowSharingType::NSWindowSharingNone);
             }
 
             if pl_attrs.titlebar_transparent {
                 this.setTitlebarAppearsTransparent(true);
             }
             if pl_attrs.title_hidden {
-                this.setTitleVisibility(NSWindowTitleHidden);
+                this.setTitleVisibility(NSWindowTitleVisibility::Hidden);
             }
             if pl_attrs.titlebar_buttons_hidden {
                 for titlebar_button in &[
                     #[allow(deprecated)]
-                    NSWindowFullScreenButton,
-                    NSWindowMiniaturizeButton,
-                    NSWindowCloseButton,
-                    NSWindowZoomButton,
+                    NSWindowButton::FullScreen,
+                    NSWindowButton::Miniaturize,
+                    NSWindowButton::Close,
+                    NSWindowButton::Zoom,
                 ] {
                     if let Some(button) = this.standardWindowButton(*titlebar_button) {
                         button.setHidden(true);
@@ -469,7 +432,7 @@ impl WinitWindow {
             }
 
             if !attrs.enabled_buttons.contains(WindowButtons::MAXIMIZE) {
-                if let Some(button) = this.standardWindowButton(NSWindowZoomButton) {
+                if let Some(button) = this.standardWindowButton(NSWindowButton::Zoom) {
                     button.setEnabled(false);
                 }
             }
@@ -487,16 +450,25 @@ impl WinitWindow {
         })
         .ok_or_else(|| os_error!(OsError::CreationError("Couldn't create `NSWindow`")))?;
 
-        if let Some(parent_window) = attrs.parent_window {
-            let parent = parent_window.ns_view.get(mtm).window().ok_or_else(|| {
-                os_error!(OsError::CreationError(
-                    "parent view should be installed in a window"
-                ))
-            })?;
+        #[cfg(feature = "rwh_06")]
+        match attrs.parent_window.0 {
+            Some(rwh_06::RawWindowHandle::AppKit(handle)) => {
+                // SAFETY: Caller ensures the pointer is valid or NULL
+                // Unwrap is fine, since the pointer comes from `NonNull`.
+                let parent_view: Id<NSView> =
+                    unsafe { Id::retain(handle.ns_view.as_ptr().cast()) }.unwrap();
+                let parent = parent_view.window().ok_or_else(|| {
+                    os_error!(OsError::CreationError(
+                        "parent view should be installed in a window"
+                    ))
+                })?;
 
-            // SAFETY: We know that there are no parent -> child -> parent cycles since the only place in `winit`
-            // where we allow making a window a child window is right here, just after it's been created.
-            unsafe { parent.addChildWindow_ordered(&this, NSWindowAbove) };
+                // SAFETY: We know that there are no parent -> child -> parent cycles since the only place in `winit`
+                // where we allow making a window a child window is right here, just after it's been created.
+                unsafe { parent.addChildWindow(&this, NSWindowOrderingMode::NSWindowAbove) };
+            }
+            Some(raw) => panic!("Invalid raw window handle {raw:?} on macOS"),
+            None => (),
         }
 
         let view = WinitView::new(&this, pl_attrs.accepts_first_mouse);
@@ -504,7 +476,6 @@ impl WinitWindow {
         // The default value of `setWantsBestResolutionOpenGLSurface:` was `false` until
         // macos 10.14 and `true` after 10.15, we should set it to `YES` or `NO` to avoid
         // always the default system value in favour of the user's code
-        #[allow(deprecated)]
         view.setWantsBestResolutionOpenGLSurface(!pl_attrs.disallow_hidpi);
 
         // On Mojave, views automatically become layer-backed shortly after being added to
@@ -512,17 +483,17 @@ impl WinitWindow {
         // the view and its associated OpenGL context. To work around this, on Mojave we
         // explicitly make the view layer-backed up front so that AppKit doesn't do it
         // itself and break the association with its context.
-        if unsafe { NSAppKitVersionNumber }.floor() > NSAppKitVersionNumber10_12 {
+        if NSAppKitVersion::current().floor() > NSAppKitVersion::NSAppKitVersionNumber10_12 {
             view.setWantsLayer(true);
         }
 
         // Configure the new view as the "key view" for the window
-        this.setContentView(Some(&view));
-        this.setInitialFirstResponder(Some(&view));
+        this.setContentView(&view);
+        this.setInitialFirstResponder(&view);
 
         if attrs.transparent {
             this.setOpaque(false);
-            this.setBackgroundColor(Some(unsafe { &NSColor::clearColor() }));
+            this.setBackgroundColor(&NSColor::clear());
         }
 
         if attrs.blur {
@@ -545,13 +516,13 @@ impl WinitWindow {
 
         match attrs.preferred_theme {
             Some(theme) => {
-                set_ns_theme(Some(theme), mtm);
+                set_ns_theme(Some(theme));
                 let mut state = this.lock_shared_state("WinitWindow::new");
                 state.current_theme = Some(theme);
             }
             None => {
                 let mut state = this.lock_shared_state("WinitWindow::new");
-                state.current_theme = Some(get_ns_theme(mtm));
+                state.current_theme = Some(get_ns_theme());
             }
         }
 
@@ -583,10 +554,9 @@ impl WinitWindow {
         Ok((this, delegate))
     }
 
-    #[track_caller]
     pub(super) fn view(&self) -> Id<WinitView> {
         // SAFETY: The view inside WinitWindow is always `WinitView`
-        unsafe { Id::cast(self.contentView().unwrap()) }
+        unsafe { Id::cast(self.contentView()) }
     }
 
     #[track_caller]
@@ -594,14 +564,14 @@ impl WinitWindow {
         &self,
         called_from_fn: &'static str,
     ) -> SharedStateMutexGuard<'_> {
-        SharedStateMutexGuard::new(self.ivars().lock().unwrap(), called_from_fn)
+        SharedStateMutexGuard::new(self.shared_state.lock().unwrap(), called_from_fn)
     }
 
     fn set_style_mask(&self, mask: NSWindowStyleMask) {
         self.setStyleMask(mask);
         // If we don't do this, key handling will break
         // (at least until the window is clicked again/etc.)
-        let _ = self.makeFirstResponder(Some(&self.contentView().unwrap()));
+        let _ = self.makeFirstResponder(Some(&self.contentView()));
     }
 }
 
@@ -622,7 +592,7 @@ impl WinitWindow {
         // NOTE: in general we want to specify the blur radius, but the choice of 80
         // should be a reasonable default.
         let radius = if blur { 80 } else { 0 };
-        let window_number = unsafe { self.windowNumber() };
+        let window_number = self.windowNumber();
         unsafe {
             CGSSetWindowBackgroundBlurRadius(CGSMainConnectionID(), window_number, radius);
         }
@@ -675,7 +645,7 @@ impl WinitWindow {
 
     #[inline]
     pub fn inner_size(&self) -> PhysicalSize<u32> {
-        let frame = self.contentView().unwrap().frame();
+        let frame = self.contentView().frame();
         let logical: LogicalSize<f64> = (frame.size.width as f64, frame.size.height as f64).into();
         let scale_factor = self.scale_factor();
         logical.to_physical(scale_factor)
@@ -797,9 +767,9 @@ impl WinitWindow {
         if !fullscreen {
             let mut mask = self.styleMask();
             if resizable {
-                mask |= NSWindowStyleMaskResizable;
+                mask |= NSWindowStyleMask::NSResizableWindowMask;
             } else {
-                mask &= !NSWindowStyleMaskResizable;
+                mask &= !NSWindowStyleMask::NSResizableWindowMask;
             }
             self.set_style_mask(mask);
         }
@@ -816,15 +786,15 @@ impl WinitWindow {
         let mut mask = self.styleMask();
 
         if buttons.contains(WindowButtons::CLOSE) {
-            mask |= NSWindowStyleMaskClosable;
+            mask |= NSWindowStyleMask::NSClosableWindowMask;
         } else {
-            mask &= !NSWindowStyleMaskClosable;
+            mask &= !NSWindowStyleMask::NSClosableWindowMask;
         }
 
         if buttons.contains(WindowButtons::MINIMIZE) {
-            mask |= NSWindowStyleMaskMiniaturizable;
+            mask |= NSWindowStyleMask::NSMiniaturizableWindowMask;
         } else {
-            mask &= !NSWindowStyleMaskMiniaturizable;
+            mask &= !NSWindowStyleMask::NSMiniaturizableWindowMask;
         }
 
         // This must happen before the button's "enabled" status has been set,
@@ -834,7 +804,7 @@ impl WinitWindow {
         // We edit the button directly instead of using `NSResizableWindowMask`,
         // since that mask also affect the resizability of the window (which is
         // controllable by other means in `winit`).
-        if let Some(button) = self.standardWindowButton(NSWindowZoomButton) {
+        if let Some(button) = self.standardWindowButton(NSWindowButton::Zoom) {
             button.setEnabled(buttons.contains(WindowButtons::MAXIMIZE));
         }
     }
@@ -846,7 +816,7 @@ impl WinitWindow {
             buttons |= WindowButtons::MINIMIZE;
         }
         if self
-            .standardWindowButton(NSWindowZoomButton)
+            .standardWindowButton(NSWindowButton::Zoom)
             .map(|b| b.isEnabled())
             .unwrap_or(true)
         {
@@ -860,14 +830,7 @@ impl WinitWindow {
 
     pub fn set_cursor_icon(&self, icon: CursorIcon) {
         let view = self.view();
-        view.set_cursor_icon(cursor_from_icon(icon));
-        self.invalidateCursorRectsForView(&view);
-    }
-
-    #[inline]
-    pub(crate) fn set_custom_cursor(&self, cursor: PlatformCustomCursor) {
-        let view = self.view();
-        view.set_cursor_icon(cursor.0.clone());
+        view.set_cursor_icon(NSCursor::from_icon(icon));
         self.invalidateCursorRectsForView(&view);
     }
 
@@ -920,11 +883,8 @@ impl WinitWindow {
 
     #[inline]
     pub fn drag_window(&self) -> Result<(), ExternalError> {
-        let mtm = MainThreadMarker::from(self);
-        let event = NSApplication::sharedApplication(mtm)
-            .currentEvent()
-            .unwrap();
-        self.performWindowDragWithEvent(&event);
+        let event = NSApp().currentEvent();
+        self.performWindowDragWithEvent(event.as_deref());
         Ok(())
     }
 
@@ -947,8 +907,9 @@ impl WinitWindow {
         // we make it resizable temporalily.
         let curr_mask = self.styleMask();
 
-        let required = NSWindowStyleMaskTitled | NSWindowStyleMaskResizable;
-        let needs_temp_mask = !mask_contains(curr_mask, required);
+        let required =
+            NSWindowStyleMask::NSTitledWindowMask | NSWindowStyleMask::NSResizableWindowMask;
+        let needs_temp_mask = !curr_mask.contains(required);
         if needs_temp_mask {
             self.set_style_mask(required);
         }
@@ -969,9 +930,9 @@ impl WinitWindow {
             .take()
             .unwrap_or_else(|| self.styleMask());
         if shared_state.resizable {
-            base_mask | NSWindowStyleMaskResizable
+            base_mask | NSWindowStyleMask::NSResizableWindowMask
         } else {
-            base_mask & !NSWindowStyleMaskResizable
+            base_mask & !NSWindowStyleMask::NSResizableWindowMask
         }
     }
 
@@ -1002,7 +963,7 @@ impl WinitWindow {
         if minimized {
             self.miniaturize(Some(self));
         } else {
-            unsafe { self.deminiaturize(Some(self)) };
+            self.deminiaturize(Some(self));
         }
     }
 
@@ -1013,7 +974,6 @@ impl WinitWindow {
 
     #[inline]
     pub fn set_maximized(&self, maximized: bool) {
-        let mtm = MainThreadMarker::from(self);
         let is_zoomed = self.is_zoomed();
         if is_zoomed == maximized {
             return;
@@ -1032,14 +992,17 @@ impl WinitWindow {
             return;
         }
 
-        if mask_contains(self.styleMask(), NSWindowStyleMaskResizable) {
+        if self
+            .styleMask()
+            .contains(NSWindowStyleMask::NSResizableWindowMask)
+        {
             drop(shared_state);
             // Just use the native zoom if resizable
             self.zoom(None);
         } else {
             // if it's not resizable, we set the frame directly
             let new_rect = if maximized {
-                let screen = NSScreen::mainScreen(mtm).expect("no screen found");
+                let screen = NSScreen::main().expect("no screen found");
                 screen.visibleFrame()
             } else {
                 shared_state.saved_standard_frame()
@@ -1062,9 +1025,6 @@ impl WinitWindow {
 
     #[inline]
     pub(crate) fn set_fullscreen(&self, fullscreen: Option<Fullscreen>) {
-        let mtm = MainThreadMarker::from(self);
-        let app = NSApplication::sharedApplication(mtm);
-
         let mut shared_state_lock = self.lock_shared_state("set_fullscreen");
         if shared_state_lock.is_simple_fullscreen {
             return;
@@ -1096,7 +1056,7 @@ impl WinitWindow {
                 }
                 Fullscreen::Exclusive(video_mode) => video_mode.monitor(),
             }
-            .ns_screen(mtm)
+            .ns_screen()
             .unwrap();
 
             let old_screen = self.screen().unwrap();
@@ -1127,6 +1087,7 @@ impl WinitWindow {
             let mut fade_token = ffi::kCGDisplayFadeReservationInvalidToken;
 
             if matches!(old_fullscreen, Some(Fullscreen::Borderless(_))) {
+                let app = NSApp();
                 let mut shared_state_lock = self.lock_shared_state("set_fullscreen");
                 shared_state_lock.save_presentation_opts = Some(app.presentationOptions());
             }
@@ -1184,7 +1145,7 @@ impl WinitWindow {
             // Window level must be restored from `CGShieldingWindowLevel()
             // + 1` back to normal in order for `toggleFullScreen` to do
             // anything
-            window.setLevel(kCGNormalWindowLevel as NSWindowLevel);
+            window.setLevel(NSWindowLevel::Normal);
             window.toggleFullScreen(None);
         }
 
@@ -1194,8 +1155,9 @@ impl WinitWindow {
                 // set a normal style temporarily. The previous state will be
                 // restored in `WindowDelegate::window_did_exit_fullscreen`.
                 let curr_mask = self.styleMask();
-                let required = NSWindowStyleMaskTitled | NSWindowStyleMaskResizable;
-                if !mask_contains(curr_mask, required) {
+                let required = NSWindowStyleMask::NSTitledWindowMask
+                    | NSWindowStyleMask::NSResizableWindowMask;
+                if !curr_mask.contains(required) {
                     self.set_style_mask(required);
                     self.lock_shared_state("set_fullscreen").saved_style = Some(curr_mask);
                 }
@@ -1224,27 +1186,30 @@ impl WinitWindow {
                 // of the menu bar, and this looks broken, so we must make sure
                 // that the menu bar is disabled. This is done in the window
                 // delegate in `window:willUseFullScreenPresentationOptions:`.
+                let app = NSApp();
                 self.lock_shared_state("set_fullscreen")
                     .save_presentation_opts = Some(app.presentationOptions());
 
-                let presentation_options = NSApplicationPresentationFullScreen
-                    | NSApplicationPresentationHideDock
-                    | NSApplicationPresentationHideMenuBar;
+                let presentation_options =
+                    NSApplicationPresentationOptions::NSApplicationPresentationFullScreen
+                        | NSApplicationPresentationOptions::NSApplicationPresentationHideDock
+                        | NSApplicationPresentationOptions::NSApplicationPresentationHideMenuBar;
                 app.setPresentationOptions(presentation_options);
 
-                let window_level = unsafe { ffi::CGShieldingWindowLevel() } as NSWindowLevel + 1;
+                let window_level =
+                    NSWindowLevel(unsafe { ffi::CGShieldingWindowLevel() } as NSInteger + 1);
                 self.setLevel(window_level);
             }
             (Some(Fullscreen::Exclusive(ref video_mode)), Some(Fullscreen::Borderless(_))) => {
                 let presentation_options = self
                     .lock_shared_state("set_fullscreen")
                     .save_presentation_opts
-                    .unwrap_or(
-                        NSApplicationPresentationFullScreen
-                            | NSApplicationPresentationAutoHideDock
-                            | NSApplicationPresentationAutoHideMenuBar,
-                    );
-                app.setPresentationOptions(presentation_options);
+                    .unwrap_or_else(|| {
+                        NSApplicationPresentationOptions::NSApplicationPresentationFullScreen
+                        | NSApplicationPresentationOptions::NSApplicationPresentationAutoHideDock
+                        | NSApplicationPresentationOptions::NSApplicationPresentationAutoHideMenuBar
+                    });
+                NSApp().setPresentationOptions(presentation_options);
 
                 unsafe {
                     ffi::CGRestorePermanentDisplayConfiguration();
@@ -1256,7 +1221,7 @@ impl WinitWindow {
 
                 // Restore the normal window level following the Borderless fullscreen
                 // `CGShieldingWindowLevel() + 1` hack.
-                self.setLevel(kCGNormalWindowLevel as NSWindowLevel);
+                self.setLevel(NSWindowLevel::Normal);
             }
             _ => {}
         };
@@ -1284,15 +1249,15 @@ impl WinitWindow {
 
         let new_mask = {
             let mut new_mask = if decorations {
-                NSWindowStyleMaskClosable
-                    | NSWindowStyleMaskMiniaturizable
-                    | NSWindowStyleMaskResizable
-                    | NSWindowStyleMaskTitled
+                NSWindowStyleMask::NSClosableWindowMask
+                    | NSWindowStyleMask::NSMiniaturizableWindowMask
+                    | NSWindowStyleMask::NSResizableWindowMask
+                    | NSWindowStyleMask::NSTitledWindowMask
             } else {
-                NSWindowStyleMaskBorderless | NSWindowStyleMaskResizable
+                NSWindowStyleMask::NSBorderlessWindowMask | NSWindowStyleMask::NSResizableWindowMask
             };
             if !resizable {
-                new_mask &= !NSWindowStyleMaskResizable;
+                new_mask &= !NSWindowStyleMask::NSResizableWindowMask;
             }
             new_mask
         };
@@ -1307,9 +1272,9 @@ impl WinitWindow {
     #[inline]
     pub fn set_window_level(&self, level: WindowLevel) {
         let level = match level {
-            WindowLevel::AlwaysOnTop => kCGFloatingWindowLevel as NSWindowLevel,
-            WindowLevel::AlwaysOnBottom => (kCGNormalWindowLevel - 1) as NSWindowLevel,
-            WindowLevel::Normal => kCGNormalWindowLevel as NSWindowLevel,
+            WindowLevel::AlwaysOnTop => NSWindowLevel::Floating,
+            WindowLevel::AlwaysOnBottom => NSWindowLevel::BELOW_NORMAL,
+            WindowLevel::Normal => NSWindowLevel::Normal,
         };
         self.setLevel(level);
     }
@@ -1344,33 +1309,30 @@ impl WinitWindow {
 
     #[inline]
     pub fn focus_window(&self) {
-        let mtm = MainThreadMarker::from(self);
         let is_minimized = self.isMiniaturized();
         let is_visible = self.isVisible();
 
         if !is_minimized && is_visible {
-            #[allow(deprecated)]
-            NSApplication::sharedApplication(mtm).activateIgnoringOtherApps(true);
+            NSApp().activateIgnoringOtherApps(true);
             self.makeKeyAndOrderFront(None);
         }
     }
 
     #[inline]
     pub fn request_user_attention(&self, request_type: Option<UserAttentionType>) {
-        let mtm = MainThreadMarker::from(self);
         let ns_request_type = request_type.map(|ty| match ty {
-            UserAttentionType::Critical => NSCriticalRequest,
-            UserAttentionType::Informational => NSInformationalRequest,
+            UserAttentionType::Critical => NSRequestUserAttentionType::NSCriticalRequest,
+            UserAttentionType::Informational => NSRequestUserAttentionType::NSInformationalRequest,
         });
         if let Some(ty) = ns_request_type {
-            NSApplication::sharedApplication(mtm).requestUserAttention(ty);
+            NSApp().requestUserAttention(ty);
         }
     }
 
     #[inline]
     // Allow directly accessing the current monitor internally without unwrapping.
     pub(crate) fn current_monitor_inner(&self) -> Option<MonitorHandle> {
-        let display_id = get_display_id(&*self.screen()?);
+        let display_id = self.screen()?.display_id();
         Some(MonitorHandle::new(display_id))
     }
 
@@ -1395,7 +1357,7 @@ impl WinitWindow {
     pub fn raw_window_handle_rwh_04(&self) -> rwh_04::RawWindowHandle {
         let mut window_handle = rwh_04::AppKitHandle::empty();
         window_handle.ns_window = self as *const Self as *mut _;
-        window_handle.ns_view = Id::as_ptr(&self.contentView().unwrap()) as *mut _;
+        window_handle.ns_view = Id::as_ptr(&self.contentView()) as *mut _;
         rwh_04::RawWindowHandle::AppKit(window_handle)
     }
 
@@ -1404,7 +1366,7 @@ impl WinitWindow {
     pub fn raw_window_handle_rwh_05(&self) -> rwh_05::RawWindowHandle {
         let mut window_handle = rwh_05::AppKitWindowHandle::empty();
         window_handle.ns_window = self as *const Self as *mut _;
-        window_handle.ns_view = Id::as_ptr(&self.contentView().unwrap()) as *mut _;
+        window_handle.ns_view = Id::as_ptr(&self.contentView()) as *mut _;
         rwh_05::RawWindowHandle::AppKit(window_handle)
     }
 
@@ -1416,12 +1378,12 @@ impl WinitWindow {
 
     #[cfg(feature = "rwh_06")]
     #[inline]
-    pub fn raw_window_handle_rwh_06(&self) -> rwh_06::RawWindowHandle {
+    pub fn raw_window_handle_rwh_06(&self) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
         let window_handle = rwh_06::AppKitWindowHandle::new({
-            let ptr = Id::as_ptr(&self.contentView().unwrap()) as *mut _;
+            let ptr = Id::as_ptr(&self.contentView()) as *mut _;
             std::ptr::NonNull::new(ptr).expect("Id<T> should never be null")
         });
-        rwh_06::RawWindowHandle::AppKit(window_handle)
+        Ok(rwh_06::RawWindowHandle::AppKit(window_handle))
     }
 
     #[cfg(feature = "rwh_06")]
@@ -1454,24 +1416,21 @@ impl WinitWindow {
     }
 
     pub fn set_theme(&self, theme: Option<Theme>) {
-        let mtm = MainThreadMarker::from(self);
-        set_ns_theme(theme, mtm);
-        self.lock_shared_state("set_theme").current_theme =
-            theme.or_else(|| Some(get_ns_theme(mtm)));
+        set_ns_theme(theme);
+        self.lock_shared_state("set_theme").current_theme = theme.or_else(|| Some(get_ns_theme()));
     }
 
     #[inline]
     pub fn set_content_protected(&self, protected: bool) {
         self.setSharingType(if protected {
-            NSWindowSharingNone
+            NSWindowSharingType::NSWindowSharingNone
         } else {
-            NSWindowSharingReadOnly
+            NSWindowSharingType::NSWindowSharingReadOnly
         })
     }
 
     pub fn title(&self) -> String {
-        let window: &NSWindow = self;
-        window.title().to_string()
+        self.title_().to_string()
     }
 
     pub fn reset_dead_keys(&self) {
@@ -1488,10 +1447,9 @@ impl WindowExtMacOS for WinitWindow {
 
     #[inline]
     fn set_simple_fullscreen(&self, fullscreen: bool) -> bool {
-        let mtm = MainThreadMarker::from(self);
         let mut shared_state_lock = self.lock_shared_state("set_simple_fullscreen");
 
-        let app = NSApplication::sharedApplication(mtm);
+        let app = NSApp();
         let is_native_fullscreen = shared_state_lock.fullscreen.is_some();
         let is_simple_fullscreen = shared_state_lock.is_simple_fullscreen;
 
@@ -1519,19 +1477,20 @@ impl WindowExtMacOS for WinitWindow {
 
             // Simulate pre-Lion fullscreen by hiding the dock and menu bar
             let presentation_options =
-                NSApplicationPresentationAutoHideDock | NSApplicationPresentationAutoHideMenuBar;
+                NSApplicationPresentationOptions::NSApplicationPresentationAutoHideDock
+                    | NSApplicationPresentationOptions::NSApplicationPresentationAutoHideMenuBar;
             app.setPresentationOptions(presentation_options);
 
             // Hide the titlebar
-            self.toggle_style_mask(NSWindowStyleMaskTitled, false);
+            self.toggle_style_mask(NSWindowStyleMask::NSTitledWindowMask, false);
 
             // Set the window frame to the screen frame size
             let screen = self.screen().expect("expected screen to be available");
             self.setFrame_display(screen.frame(), true);
 
             // Fullscreen windows can't be resized, minimized, or moved
-            self.toggle_style_mask(NSWindowStyleMaskMiniaturizable, false);
-            self.toggle_style_mask(NSWindowStyleMaskResizable, false);
+            self.toggle_style_mask(NSWindowStyleMask::NSMiniaturizableWindowMask, false);
+            self.toggle_style_mask(NSWindowStyleMask::NSResizableWindowMask, false);
             self.setMovable(false);
 
             true
@@ -1580,20 +1539,24 @@ impl WindowExtMacOS for WinitWindow {
 
     #[inline]
     fn select_next_tab(&self) {
-        self.selectNextTab(None)
+        if let Some(group) = self.tabGroup() {
+            group.selectNextTab();
+        }
     }
 
     #[inline]
     fn select_previous_tab(&self) {
-        unsafe { self.selectPreviousTab(None) }
+        if let Some(group) = self.tabGroup() {
+            group.selectPreviousTab()
+        }
     }
 
     #[inline]
     fn select_tab_at_index(&self, index: usize) {
         if let Some(group) = self.tabGroup() {
-            if let Some(windows) = unsafe { self.tabbedWindows() } {
+            if let Some(windows) = group.tabbedWindows() {
                 if index < windows.len() {
-                    group.setSelectedWindow(Some(&windows[index]));
+                    group.setSelectedWindow(&windows[index]);
                 }
             }
         }
@@ -1601,7 +1564,8 @@ impl WindowExtMacOS for WinitWindow {
 
     #[inline]
     fn num_tabs(&self) -> usize {
-        unsafe { self.tabbedWindows() }
+        self.tabGroup()
+            .and_then(|group| group.tabbedWindows())
             .map(|windows| windows.len())
             .unwrap_or(1)
     }
@@ -1625,31 +1589,25 @@ impl WindowExtMacOS for WinitWindow {
     }
 }
 
-fn mask_contains(mask: NSWindowStyleMask, value: NSWindowStyleMask) -> bool {
-    mask & value == value
-}
-
-pub(super) fn get_ns_theme(mtm: MainThreadMarker) -> Theme {
-    let app = NSApplication::sharedApplication(mtm);
+pub(super) fn get_ns_theme() -> Theme {
+    let app = NSApp();
     let has_theme: bool = unsafe { msg_send![&app, respondsToSelector: sel!(effectiveAppearance)] };
     if !has_theme {
         return Theme::Light;
     }
     let appearance = app.effectiveAppearance();
-    let name = appearance
-        .bestMatchFromAppearancesWithNames(&NSArray::from_id_slice(&[
-            NSString::from_str("NSAppearanceNameAqua"),
-            NSString::from_str("NSAppearanceNameDarkAqua"),
-        ]))
-        .unwrap();
+    let name = appearance.bestMatchFromAppearancesWithNames(&NSArray::from_id_slice(&[
+        NSString::from_str("NSAppearanceNameAqua"),
+        NSString::from_str("NSAppearanceNameDarkAqua"),
+    ]));
     match &*name.to_string() {
         "NSAppearanceNameDarkAqua" => Theme::Dark,
         _ => Theme::Light,
     }
 }
 
-fn set_ns_theme(theme: Option<Theme>, mtm: MainThreadMarker) {
-    let app = NSApplication::sharedApplication(mtm);
+fn set_ns_theme(theme: Option<Theme>) {
+    let app = NSApp();
     let has_theme: bool = unsafe { msg_send![&app, respondsToSelector: sel!(effectiveAppearance)] };
     if has_theme {
         let appearance = theme.map(|t| {
@@ -1657,7 +1615,7 @@ fn set_ns_theme(theme: Option<Theme>, mtm: MainThreadMarker) {
                 Theme::Dark => NSString::from_str("NSAppearanceNameDarkAqua"),
                 Theme::Light => NSString::from_str("NSAppearanceNameAqua"),
             };
-            NSAppearance::appearanceNamed(&name).unwrap()
+            NSAppearance::appearanceNamed(&name)
         });
         app.setAppearance(appearance.as_ref().map(|a| a.as_ref()));
     }

src/platform_impl/macos/window_delegate.rs

@@ -1,19 +1,16 @@
 #![allow(clippy::unnecessary_cast)]
 use std::cell::Cell;
-use std::ptr;
+use std::ptr::{self, NonNull};
 
-use icrate::AppKit::{
-    NSApplicationPresentationFullScreen, NSApplicationPresentationHideDock,
-    NSApplicationPresentationHideMenuBar, NSApplicationPresentationOptions, NSDraggingDestination,
-    NSFilenamesPboardType, NSPasteboard, NSWindowDelegate, NSWindowOcclusionStateVisible,
-};
-use icrate::Foundation::{MainThreadMarker, NSArray, NSObject, NSObjectProtocol, NSSize, NSString};
+use icrate::Foundation::{NSArray, NSObject, NSSize, NSString};
+use objc2::declare::{Ivar, IvarDrop};
 use objc2::rc::{autoreleasepool, Id};
-use objc2::runtime::{AnyObject, ProtocolObject};
-use objc2::{
-    class, declare_class, msg_send, msg_send_id, mutability, sel, ClassType, DeclaredClass,
-};
+use objc2::runtime::AnyObject;
+use objc2::{class, declare_class, msg_send, msg_send_id, mutability, sel, ClassType};
 
+use super::appkit::{
+    NSApplicationPresentationOptions, NSFilenamesPboardType, NSPasteboard, NSWindowOcclusionState,
+};
 use super::{
     app_state::AppState,
     util,
@@ -27,9 +24,7 @@ use crate::{
 };
 
 #[derive(Debug)]
-pub(crate) struct State {
-    window: Id<WinitWindow>,
-
+pub struct State {
     // This is set when WindowBuilder::with_fullscreen was set,
     // see comments of `window_did_fail_to_enter_fullscreen`
     initial_fullscreen: Cell<bool>,
@@ -42,21 +37,72 @@ pub(crate) struct State {
 }
 
 declare_class!(
-    pub(crate) struct WinitWindowDelegate;
+    #[derive(Debug)]
+    pub(crate) struct WinitWindowDelegate {
+        window: IvarDrop<Id<WinitWindow>, "_window">,
+
+        // TODO: It may be possible for delegate methods to be called
+        // asynchronously, causing data races panics?
+        // TODO: Remove unnecessary boxing here
+        state: IvarDrop<Box<State>, "_state">,
+    }
+
+    mod ivars;
 
     unsafe impl ClassType for WinitWindowDelegate {
         type Super = NSObject;
-        type Mutability = mutability::MainThreadOnly;
+        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitWindowDelegate";
     }
 
-    impl DeclaredClass for WinitWindowDelegate {
-        type Ivars = State;
+    unsafe impl WinitWindowDelegate {
+        #[method(initWithWindow:initialFullscreen:)]
+        unsafe fn init_with_winit(
+            this: *mut Self,
+            window: &WinitWindow,
+            initial_fullscreen: bool,
+        ) -> Option<NonNull<Self>> {
+            let this: Option<&mut Self> = unsafe { msg_send![super(this), init] };
+            this.map(|this| {
+                let scale_factor = window.scale_factor();
+
+                Ivar::write(&mut this.window, window.retain());
+                Ivar::write(
+                    &mut this.state,
+                    Box::new(State {
+                        initial_fullscreen: Cell::new(initial_fullscreen),
+                        previous_position: Cell::new(None),
+                        previous_scale_factor: Cell::new(scale_factor),
+                    }),
+                );
+
+                if scale_factor != 1.0 {
+                    this.queue_static_scale_factor_changed_event();
+                }
+                this.window.setDelegate(Some(this));
+
+                // Enable theme change event
+                let notification_center: Id<AnyObject> =
+                    unsafe { msg_send_id![class!(NSDistributedNotificationCenter), defaultCenter] };
+                let notification_name =
+                    NSString::from_str("AppleInterfaceThemeChangedNotification");
+                let _: () = unsafe {
+                    msg_send![
+                        &notification_center,
+                        addObserver: &*this
+                        selector: sel!(effectiveAppearanceDidChange:)
+                        name: &*notification_name
+                        object: ptr::null::<AnyObject>()
+                    ]
+                };
+
+                NonNull::from(this)
+            })
+        }
     }
 
-    unsafe impl NSObjectProtocol for WinitWindowDelegate {}
-
-    unsafe impl NSWindowDelegate for WinitWindowDelegate {
+    // NSWindowDelegate + NSDraggingDestination protocols
+    unsafe impl WinitWindowDelegate {
         #[method(windowShouldClose:)]
         fn window_should_close(&self, _: Option<&AnyObject>) -> bool {
             trace_scope!("windowShouldClose:");
@@ -71,7 +117,7 @@ declare_class!(
             autoreleasepool(|_| {
                 // Since El Capitan, we need to be careful that delegate methods can't
                 // be called after the window closes.
-                self.ivars().window.setDelegate(None);
+                self.window.setDelegate(None);
             });
             self.queue_event(WindowEvent::Destroyed);
         }
@@ -88,19 +134,16 @@ declare_class!(
             trace_scope!("windowWillStartLiveResize:");
 
             let increments = self
-                .ivars()
                 .window
                 .lock_shared_state("window_will_enter_fullscreen")
                 .resize_increments;
-            self.ivars().window.set_resize_increments_inner(increments);
+            self.window.set_resize_increments_inner(increments);
         }
 
         #[method(windowDidEndLiveResize:)]
         fn window_did_end_live_resize(&self, _: Option<&AnyObject>) {
             trace_scope!("windowDidEndLiveResize:");
-            self.ivars()
-                .window
-                .set_resize_increments_inner(NSSize::new(1., 1.));
+            self.window.set_resize_increments_inner(NSSize::new(1., 1.));
         }
 
         // This won't be triggered if the move was part of a resize.
@@ -134,183 +177,11 @@ declare_class!(
             // NSWindowDelegate, and as a result a tracked modifiers state can quite
             // easily fall out of synchrony with reality.  This requires us to emit
             // a synthetic ModifiersChanged event when we lose focus.
-            self.ivars().window.view().reset_modifiers();
+            self.window.view().reset_modifiers();
 
             self.queue_event(WindowEvent::Focused(false));
         }
 
-        /// Invoked when before enter fullscreen
-        #[method(windowWillEnterFullScreen:)]
-        fn window_will_enter_fullscreen(&self, _: Option<&AnyObject>) {
-            trace_scope!("windowWillEnterFullScreen:");
-
-            let mut shared_state = self
-                .ivars()
-                .window
-                .lock_shared_state("window_will_enter_fullscreen");
-            shared_state.maximized = self.ivars().window.is_zoomed();
-            let fullscreen = shared_state.fullscreen.as_ref();
-            match fullscreen {
-                // Exclusive mode sets the state in `set_fullscreen` as the user
-                // can't enter exclusive mode by other means (like the
-                // fullscreen button on the window decorations)
-                Some(Fullscreen::Exclusive(_)) => (),
-                // `window_will_enter_fullscreen` was triggered and we're already
-                // in fullscreen, so we must've reached here by `set_fullscreen`
-                // as it updates the state
-                Some(Fullscreen::Borderless(_)) => (),
-                // Otherwise, we must've reached fullscreen by the user clicking
-                // on the green fullscreen button. Update state!
-                None => {
-                    let current_monitor = self.ivars().window.current_monitor_inner();
-                    shared_state.fullscreen = Some(Fullscreen::Borderless(current_monitor))
-                }
-            }
-            shared_state.in_fullscreen_transition = true;
-        }
-
-        /// Invoked when before exit fullscreen
-        #[method(windowWillExitFullScreen:)]
-        fn window_will_exit_fullscreen(&self, _: Option<&AnyObject>) {
-            trace_scope!("windowWillExitFullScreen:");
-
-            let mut shared_state = self
-                .ivars()
-                .window
-                .lock_shared_state("window_will_exit_fullscreen");
-            shared_state.in_fullscreen_transition = true;
-        }
-
-        #[method(window:willUseFullScreenPresentationOptions:)]
-        fn window_will_use_fullscreen_presentation_options(
-            &self,
-            _: Option<&AnyObject>,
-            proposed_options: NSApplicationPresentationOptions,
-        ) -> NSApplicationPresentationOptions {
-            trace_scope!("window:willUseFullScreenPresentationOptions:");
-            // Generally, games will want to disable the menu bar and the dock. Ideally,
-            // this would be configurable by the user. Unfortunately because of our
-            // `CGShieldingWindowLevel() + 1` hack (see `set_fullscreen`), our window is
-            // placed on top of the menu bar in exclusive fullscreen mode. This looks
-            // broken so we always disable the menu bar in exclusive fullscreen. We may
-            // still want to make this configurable for borderless fullscreen. Right now
-            // we don't, for consistency. If we do, it should be documented that the
-            // user-provided options are ignored in exclusive fullscreen.
-            let mut options = proposed_options;
-            let shared_state = self
-                .ivars()
-                .window
-                .lock_shared_state("window_will_use_fullscreen_presentation_options");
-            if let Some(Fullscreen::Exclusive(_)) = shared_state.fullscreen {
-                options = NSApplicationPresentationFullScreen
-                    | NSApplicationPresentationHideDock
-                    | NSApplicationPresentationHideMenuBar;
-            }
-
-            options
-        }
-
-        /// Invoked when entered fullscreen
-        #[method(windowDidEnterFullScreen:)]
-        fn window_did_enter_fullscreen(&self, _: Option<&AnyObject>) {
-            trace_scope!("windowDidEnterFullScreen:");
-            self.ivars().initial_fullscreen.set(false);
-            let mut shared_state = self
-                .ivars()
-                .window
-                .lock_shared_state("window_did_enter_fullscreen");
-            shared_state.in_fullscreen_transition = false;
-            let target_fullscreen = shared_state.target_fullscreen.take();
-            drop(shared_state);
-            if let Some(target_fullscreen) = target_fullscreen {
-                self.ivars().window.set_fullscreen(target_fullscreen);
-            }
-        }
-
-        /// Invoked when exited fullscreen
-        #[method(windowDidExitFullScreen:)]
-        fn window_did_exit_fullscreen(&self, _: Option<&AnyObject>) {
-            trace_scope!("windowDidExitFullScreen:");
-
-            self.ivars().window.restore_state_from_fullscreen();
-            let mut shared_state = self
-                .ivars()
-                .window
-                .lock_shared_state("window_did_exit_fullscreen");
-            shared_state.in_fullscreen_transition = false;
-            let target_fullscreen = shared_state.target_fullscreen.take();
-            drop(shared_state);
-            if let Some(target_fullscreen) = target_fullscreen {
-                self.ivars().window.set_fullscreen(target_fullscreen);
-            }
-        }
-
-        /// Invoked when fail to enter fullscreen
-        ///
-        /// When this window launch from a fullscreen app (e.g. launch from VS Code
-        /// terminal), it creates a new virtual destkop and a transition animation.
-        /// This animation takes one second and cannot be disable without
-        /// elevated privileges. In this animation time, all toggleFullscreen events
-        /// will be failed. In this implementation, we will try again by using
-        /// performSelector:withObject:afterDelay: until window_did_enter_fullscreen.
-        /// It should be fine as we only do this at initialzation (i.e with_fullscreen
-        /// was set).
-        ///
-        /// From Apple doc:
-        /// In some cases, the transition to enter full-screen mode can fail,
-        /// due to being in the midst of handling some other animation or user gesture.
-        /// This method indicates that there was an error, and you should clean up any
-        /// work you may have done to prepare to enter full-screen mode.
-        #[method(windowDidFailToEnterFullScreen:)]
-        fn window_did_fail_to_enter_fullscreen(&self, _: Option<&AnyObject>) {
-            trace_scope!("windowDidFailToEnterFullScreen:");
-            let mut shared_state = self
-                .ivars()
-                .window
-                .lock_shared_state("window_did_fail_to_enter_fullscreen");
-            shared_state.in_fullscreen_transition = false;
-            shared_state.target_fullscreen = None;
-            if self.ivars().initial_fullscreen.get() {
-                #[allow(clippy::let_unit_value)]
-                unsafe {
-                    let _: () = msg_send![
-                        &*self.ivars().window,
-                        performSelector: sel!(toggleFullScreen:),
-                        withObject: ptr::null::<AnyObject>(),
-                        afterDelay: 0.5,
-                    ];
-                };
-            } else {
-                self.ivars().window.restore_state_from_fullscreen();
-            }
-        }
-
-        // Invoked when the occlusion state of the window changes
-        #[method(windowDidChangeOcclusionState:)]
-        fn window_did_change_occlusion_state(&self, _: Option<&AnyObject>) {
-            trace_scope!("windowDidChangeOcclusionState:");
-            let visible = self.ivars().window.occlusionState() & NSWindowOcclusionStateVisible
-                == NSWindowOcclusionStateVisible;
-            self.queue_event(WindowEvent::Occluded(!visible));
-        }
-
-        #[method(windowDidChangeScreen:)]
-        fn window_did_change_screen(&self, _: Option<&AnyObject>) {
-            trace_scope!("windowDidChangeScreen:");
-            let is_simple_fullscreen = self
-                .ivars()
-                .window
-                .lock_shared_state("window_did_change_screen")
-                .is_simple_fullscreen;
-            if is_simple_fullscreen {
-                if let Some(screen) = self.ivars().window.screen() {
-                    self.ivars().window.setFrame_display(screen.frame(), true);
-                }
-            }
-        }
-    }
-
-    unsafe impl NSDraggingDestination for WinitWindowDelegate {
         /// Invoked when the dragged image enters destination bounds or frame
         #[method(draggingEntered:)]
         fn dragging_entered(&self, sender: &NSObject) -> bool {
@@ -319,9 +190,7 @@ declare_class!(
             use std::path::PathBuf;
 
             let pb: Id<NSPasteboard> = unsafe { msg_send_id![sender, draggingPasteboard] };
-            let filenames = pb
-                .propertyListForType(unsafe { NSFilenamesPboardType })
-                .unwrap();
+            let filenames = pb.propertyListForType(unsafe { NSFilenamesPboardType });
             let filenames: Id<NSArray<NSString>> = unsafe { Id::cast(filenames) };
 
             filenames.into_iter().for_each(|file| {
@@ -347,9 +216,7 @@ declare_class!(
             use std::path::PathBuf;
 
             let pb: Id<NSPasteboard> = unsafe { msg_send_id![sender, draggingPasteboard] };
-            let filenames = pb
-                .propertyListForType(unsafe { NSFilenamesPboardType })
-                .unwrap();
+            let filenames = pb.propertyListForType(unsafe { NSFilenamesPboardType });
             let filenames: Id<NSArray<NSString>> = unsafe { Id::cast(filenames) };
 
             filenames.into_iter().for_each(|file| {
@@ -372,9 +239,153 @@ declare_class!(
             trace_scope!("draggingExited:");
             self.queue_event(WindowEvent::HoveredFileCancelled);
         }
-    }
 
-    unsafe impl WinitWindowDelegate {
+        /// Invoked when before enter fullscreen
+        #[method(windowWillEnterFullScreen:)]
+        fn window_will_enter_fullscreen(&self, _: Option<&AnyObject>) {
+            trace_scope!("windowWillEnterFullScreen:");
+
+            let mut shared_state = self
+                .window
+                .lock_shared_state("window_will_enter_fullscreen");
+            shared_state.maximized = self.window.is_zoomed();
+            let fullscreen = shared_state.fullscreen.as_ref();
+            match fullscreen {
+                // Exclusive mode sets the state in `set_fullscreen` as the user
+                // can't enter exclusive mode by other means (like the
+                // fullscreen button on the window decorations)
+                Some(Fullscreen::Exclusive(_)) => (),
+                // `window_will_enter_fullscreen` was triggered and we're already
+                // in fullscreen, so we must've reached here by `set_fullscreen`
+                // as it updates the state
+                Some(Fullscreen::Borderless(_)) => (),
+                // Otherwise, we must've reached fullscreen by the user clicking
+                // on the green fullscreen button. Update state!
+                None => {
+                    let current_monitor = self.window.current_monitor_inner();
+                    shared_state.fullscreen = Some(Fullscreen::Borderless(current_monitor))
+                }
+            }
+            shared_state.in_fullscreen_transition = true;
+        }
+
+        /// Invoked when before exit fullscreen
+        #[method(windowWillExitFullScreen:)]
+        fn window_will_exit_fullscreen(&self, _: Option<&AnyObject>) {
+            trace_scope!("windowWillExitFullScreen:");
+
+            let mut shared_state = self.window.lock_shared_state("window_will_exit_fullscreen");
+            shared_state.in_fullscreen_transition = true;
+        }
+
+        #[method(window:willUseFullScreenPresentationOptions:)]
+        fn window_will_use_fullscreen_presentation_options(
+            &self,
+            _: Option<&AnyObject>,
+            proposed_options: NSApplicationPresentationOptions,
+        ) -> NSApplicationPresentationOptions {
+            trace_scope!("window:willUseFullScreenPresentationOptions:");
+            // Generally, games will want to disable the menu bar and the dock. Ideally,
+            // this would be configurable by the user. Unfortunately because of our
+            // `CGShieldingWindowLevel() + 1` hack (see `set_fullscreen`), our window is
+            // placed on top of the menu bar in exclusive fullscreen mode. This looks
+            // broken so we always disable the menu bar in exclusive fullscreen. We may
+            // still want to make this configurable for borderless fullscreen. Right now
+            // we don't, for consistency. If we do, it should be documented that the
+            // user-provided options are ignored in exclusive fullscreen.
+            let mut options = proposed_options;
+            let shared_state = self
+                .window
+                .lock_shared_state("window_will_use_fullscreen_presentation_options");
+            if let Some(Fullscreen::Exclusive(_)) = shared_state.fullscreen {
+                options = NSApplicationPresentationOptions::NSApplicationPresentationFullScreen
+                    | NSApplicationPresentationOptions::NSApplicationPresentationHideDock
+                    | NSApplicationPresentationOptions::NSApplicationPresentationHideMenuBar;
+            }
+
+            options
+        }
+
+        /// Invoked when entered fullscreen
+        #[method(windowDidEnterFullScreen:)]
+        fn window_did_enter_fullscreen(&self, _: Option<&AnyObject>) {
+            trace_scope!("windowDidEnterFullScreen:");
+            self.state.initial_fullscreen.set(false);
+            let mut shared_state = self.window.lock_shared_state("window_did_enter_fullscreen");
+            shared_state.in_fullscreen_transition = false;
+            let target_fullscreen = shared_state.target_fullscreen.take();
+            drop(shared_state);
+            if let Some(target_fullscreen) = target_fullscreen {
+                self.window.set_fullscreen(target_fullscreen);
+            }
+        }
+
+        /// Invoked when exited fullscreen
+        #[method(windowDidExitFullScreen:)]
+        fn window_did_exit_fullscreen(&self, _: Option<&AnyObject>) {
+            trace_scope!("windowDidExitFullScreen:");
+
+            self.window.restore_state_from_fullscreen();
+            let mut shared_state = self.window.lock_shared_state("window_did_exit_fullscreen");
+            shared_state.in_fullscreen_transition = false;
+            let target_fullscreen = shared_state.target_fullscreen.take();
+            drop(shared_state);
+            if let Some(target_fullscreen) = target_fullscreen {
+                self.window.set_fullscreen(target_fullscreen);
+            }
+        }
+
+        /// Invoked when fail to enter fullscreen
+        ///
+        /// When this window launch from a fullscreen app (e.g. launch from VS Code
+        /// terminal), it creates a new virtual destkop and a transition animation.
+        /// This animation takes one second and cannot be disable without
+        /// elevated privileges. In this animation time, all toggleFullscreen events
+        /// will be failed. In this implementation, we will try again by using
+        /// performSelector:withObject:afterDelay: until window_did_enter_fullscreen.
+        /// It should be fine as we only do this at initialzation (i.e with_fullscreen
+        /// was set).
+        ///
+        /// From Apple doc:
+        /// In some cases, the transition to enter full-screen mode can fail,
+        /// due to being in the midst of handling some other animation or user gesture.
+        /// This method indicates that there was an error, and you should clean up any
+        /// work you may have done to prepare to enter full-screen mode.
+        #[method(windowDidFailToEnterFullScreen:)]
+        fn window_did_fail_to_enter_fullscreen(&self, _: Option<&AnyObject>) {
+            trace_scope!("windowDidFailToEnterFullScreen:");
+            let mut shared_state = self
+                .window
+                .lock_shared_state("window_did_fail_to_enter_fullscreen");
+            shared_state.in_fullscreen_transition = false;
+            shared_state.target_fullscreen = None;
+            if self.state.initial_fullscreen.get() {
+                #[allow(clippy::let_unit_value)]
+                unsafe {
+                    let _: () = msg_send![
+                        &*self.window,
+                        performSelector: sel!(toggleFullScreen:),
+                        withObject: ptr::null::<AnyObject>(),
+                        afterDelay: 0.5,
+                    ];
+                };
+            } else {
+                self.window.restore_state_from_fullscreen();
+            }
+        }
+
+        // Invoked when the occlusion state of the window changes
+        #[method(windowDidChangeOcclusionState:)]
+        fn window_did_change_occlusion_state(&self, _: Option<&AnyObject>) {
+            trace_scope!("windowDidChangeOcclusionState:");
+            self.queue_event(WindowEvent::Occluded(
+                !self
+                    .window
+                    .occlusionState()
+                    .contains(NSWindowOcclusionState::NSWindowOcclusionStateVisible),
+            ))
+        }
+
         // Observe theme change
         #[method(effectiveAppearanceDidChange:)]
         fn effective_appearance_did_change(&self, sender: Option<&AnyObject>) {
@@ -391,10 +402,8 @@ declare_class!(
 
         #[method(effectiveAppearanceDidChangedOnMainThread:)]
         fn effective_appearance_did_changed_on_main_thread(&self, _: Option<&AnyObject>) {
-            let mtm = MainThreadMarker::from(self);
-            let theme = get_ns_theme(mtm);
+            let theme = get_ns_theme();
             let mut shared_state = self
-                .ivars()
                 .window
                 .lock_shared_state("effective_appearance_did_change");
             let current_theme = shared_state.current_theme;
@@ -404,80 +413,71 @@ declare_class!(
                 self.queue_event(WindowEvent::ThemeChanged(theme));
             }
         }
+
+        #[method(windowDidChangeScreen:)]
+        fn window_did_change_screen(&self, _: Option<&AnyObject>) {
+            trace_scope!("windowDidChangeScreen:");
+            let is_simple_fullscreen = self
+                .window
+                .lock_shared_state("window_did_change_screen")
+                .is_simple_fullscreen;
+            if is_simple_fullscreen {
+                if let Some(screen) = self.window.screen() {
+                    self.window.setFrame_display(screen.frame(), true);
+                }
+            }
+        }
     }
 );
 
 impl WinitWindowDelegate {
     pub fn new(window: &WinitWindow, initial_fullscreen: bool) -> Id<Self> {
-        let mtm = MainThreadMarker::from(window);
-        let scale_factor = window.scale_factor();
-        let this = mtm.alloc().set_ivars(State {
-            window: window.retain(),
-            initial_fullscreen: Cell::new(initial_fullscreen),
-            previous_position: Cell::new(None),
-            previous_scale_factor: Cell::new(scale_factor),
-        });
-        let this: Id<Self> = unsafe { msg_send_id![super(this), init] };
-
-        if scale_factor != 1.0 {
-            this.queue_static_scale_factor_changed_event();
-        }
-        window.setDelegate(Some(ProtocolObject::from_ref(&*this)));
-
-        // Enable theme change event
-        let notification_center: Id<AnyObject> =
-            unsafe { msg_send_id![class!(NSDistributedNotificationCenter), defaultCenter] };
-        let notification_name = NSString::from_str("AppleInterfaceThemeChangedNotification");
-        let _: () = unsafe {
-            msg_send![
-                &notification_center,
-                addObserver: &*this
-                selector: sel!(effectiveAppearanceDidChange:)
-                name: &*notification_name
-                object: ptr::null::<AnyObject>()
+        unsafe {
+            msg_send_id![
+                Self::alloc(),
+                initWithWindow: window,
+                initialFullscreen: initial_fullscreen,
             ]
-        };
-
-        this
+        }
     }
 
     pub(crate) fn queue_event(&self, event: WindowEvent) {
         let event = Event::WindowEvent {
-            window_id: WindowId(self.ivars().window.id()),
+            window_id: WindowId(self.window.id()),
             event,
         };
         AppState::queue_event(event);
     }
 
     fn queue_static_scale_factor_changed_event(&self) {
-        let scale_factor = self.ivars().window.scale_factor();
-        if scale_factor == self.ivars().previous_scale_factor.get() {
+        let scale_factor = self.window.scale_factor();
+        if scale_factor == self.state.previous_scale_factor.get() {
             return;
         };
 
-        self.ivars().previous_scale_factor.set(scale_factor);
+        self.state.previous_scale_factor.set(scale_factor);
         let suggested_size = self.view_size();
         AppState::queue_static_scale_factor_changed_event(
-            self.ivars().window.clone(),
+            self.window.clone(),
             suggested_size.to_physical(scale_factor),
             scale_factor,
         );
     }
 
     fn emit_move_event(&self) {
-        let rect = self.ivars().window.frame();
+        let rect = self.window.frame();
         let x = rect.origin.x as f64;
         let y = util::bottom_left_to_top_left(rect);
-        if self.ivars().previous_position.get() != Some((x, y)) {
-            self.ivars().previous_position.set(Some((x, y)));
-            let scale_factor = self.ivars().window.scale_factor();
+        if self.state.previous_position.get() != Some((x, y)) {
+            self.state.previous_position.set(Some((x, y)));
+            let scale_factor = self.window.scale_factor();
             let physical_pos = LogicalPosition::<f64>::from((x, y)).to_physical(scale_factor);
             self.queue_event(WindowEvent::Moved(physical_pos));
         }
     }
 
     fn view_size(&self) -> LogicalSize<f64> {
-        let size = self.ivars().window.contentView().unwrap().frame().size;
+        let size = self.window.contentView().frame().size;
         LogicalSize::new(size.width as f64, size.height as f64)
     }
 }

src/platform_impl/orbital/mod.rs

@@ -9,7 +9,7 @@ use crate::dpi::{PhysicalPosition, PhysicalSize};
 pub use self::event_loop::{EventLoop, EventLoopProxy, EventLoopWindowTarget};
 mod event_loop;
 
-pub(crate) use self::window::{OwnedWindowHandle, Window};
+pub use self::window::Window;
 mod window;
 
 struct RedoxSocket {
@@ -193,8 +193,6 @@ impl Display for OsError {
     }
 }
 
-pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursor;
-pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursorBuilder;
 pub(crate) use crate::icon::NoIcon as PlatformIcon;
 
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]

src/platform_impl/orbital/window.rs

@@ -12,8 +12,8 @@ use crate::{
 };
 
 use super::{
-    EventLoopWindowTarget, MonitorHandle, PlatformCustomCursor,
-    PlatformSpecificWindowBuilderAttributes, RedoxSocket, TimeSocket, WindowId, WindowProperties,
+    EventLoopWindowTarget, MonitorHandle, PlatformSpecificWindowBuilderAttributes, RedoxSocket,
+    TimeSocket, WindowId, WindowProperties,
 };
 
 // These values match the values uses in the `window_new` function in orbital:
@@ -25,18 +25,6 @@ const ORBITAL_FLAG_BORDERLESS: char = 'l';
 const ORBITAL_FLAG_RESIZABLE: char = 'r';
 const ORBITAL_FLAG_TRANSPARENT: char = 't';
 
-#[derive(Debug, Clone)]
-pub(crate) struct OwnedWindowHandle {}
-
-impl OwnedWindowHandle {
-    #[cfg(feature = "rwh_06")]
-    pub(crate) fn new_parent_window(_handle: rwh_06::WindowHandle<'_>) -> Self {
-        // Parent windows are currently unsupported, though owned window
-        // handles would be implementable.
-        Self {}
-    }
-}
-
 pub struct Window {
     window_socket: Arc<RedoxSocket>,
     redraws: Arc<Mutex<VecDeque<WindowId>>>,
@@ -364,8 +352,6 @@ impl Window {
     #[inline]
     pub fn set_cursor_icon(&self, _: window::CursorIcon) {}
 
-    pub(crate) fn set_custom_cursor(&self, _: PlatformCustomCursor) {}
-
     #[inline]
     pub fn set_cursor_position(&self, _: Position) -> Result<(), error::ExternalError> {
         Err(error::ExternalError::NotSupported(

src/platform_impl/web/async/channel.rs

@@ -6,67 +6,65 @@ use std::sync::mpsc::{self, Receiver, RecvError, SendError, Sender, TryRecvError
 use std::sync::{Arc, Mutex};
 use std::task::Poll;
 
+// NOTE: This channel doesn't wake up when all senders or receivers are
+// dropped. This is acceptable as long as it's only used in `Dispatcher`, which
+// has it's own `Drop` behavior.
+
 pub fn channel<T>() -> (AsyncSender<T>, AsyncReceiver<T>) {
     let (sender, receiver) = mpsc::channel();
-    let shared = Arc::new(Shared {
+    let sender = Arc::new(Mutex::new(sender));
+    let inner = Arc::new(Inner {
         closed: AtomicBool::new(false),
         waker: AtomicWaker::new(),
     });
 
-    let sender = AsyncSender(Arc::new(SenderInner {
-        sender: Mutex::new(sender),
-        shared: Arc::clone(&shared),
-    }));
+    let sender = AsyncSender {
+        sender,
+        inner: Arc::clone(&inner),
+    };
     let receiver = AsyncReceiver {
         receiver: Rc::new(receiver),
-        shared,
+        inner,
     };
 
     (sender, receiver)
 }
 
-pub struct AsyncSender<T>(Arc<SenderInner<T>>);
-
-struct SenderInner<T> {
+pub struct AsyncSender<T> {
     // We need to wrap it into a `Mutex` to make it `Sync`. So the sender can't
     // be accessed on the main thread, as it could block. Additionally we need
-    // to wrap `Sender` in an `Arc` to make it clonable on the main thread without
+    // to wrap it in an `Arc` to make it clonable on the main thread without
     // having to block.
-    sender: Mutex<Sender<T>>,
-    shared: Arc<Shared>,
+    sender: Arc<Mutex<Sender<T>>>,
+    inner: Arc<Inner>,
 }
 
 impl<T> AsyncSender<T> {
     pub fn send(&self, event: T) -> Result<(), SendError<T>> {
-        self.0.sender.lock().unwrap().send(event)?;
-        self.0.shared.waker.wake();
+        self.sender.lock().unwrap().send(event)?;
+        self.inner.waker.wake();
 
         Ok(())
     }
-}
 
-impl<T> SenderInner<T> {
-    fn close(&self) {
-        self.shared.closed.store(true, Ordering::Relaxed);
-        self.shared.waker.wake();
+    pub fn close(&self) {
+        self.inner.closed.store(true, Ordering::Relaxed);
+        self.inner.waker.wake()
     }
 }
 
 impl<T> Clone for AsyncSender<T> {
     fn clone(&self) -> Self {
-        Self(Arc::clone(&self.0))
-    }
-}
-
-impl<T> Drop for SenderInner<T> {
-    fn drop(&mut self) {
-        self.close();
+        Self {
+            sender: Arc::clone(&self.sender),
+            inner: Arc::clone(&self.inner),
+        }
     }
 }
 
 pub struct AsyncReceiver<T> {
     receiver: Rc<Receiver<T>>,
-    shared: Arc<Shared>,
+    inner: Arc<Inner>,
 }
 
 impl<T> AsyncReceiver<T> {
@@ -74,12 +72,12 @@ impl<T> AsyncReceiver<T> {
         future::poll_fn(|cx| match self.receiver.try_recv() {
             Ok(event) => Poll::Ready(Ok(event)),
             Err(TryRecvError::Empty) => {
-                self.shared.waker.register(cx.waker());
+                self.inner.waker.register(cx.waker());
 
                 match self.receiver.try_recv() {
                     Ok(event) => Poll::Ready(Ok(event)),
                     Err(TryRecvError::Empty) => {
-                        if self.shared.closed.load(Ordering::Relaxed) {
+                        if self.inner.closed.load(Ordering::Relaxed) {
                             Poll::Ready(Err(RecvError))
                         } else {
                             Poll::Pending
@@ -106,18 +104,12 @@ impl<T> Clone for AsyncReceiver<T> {
     fn clone(&self) -> Self {
         Self {
             receiver: Rc::clone(&self.receiver),
-            shared: Arc::clone(&self.shared),
+            inner: Arc::clone(&self.inner),
         }
     }
 }
 
-impl<T> Drop for AsyncReceiver<T> {
-    fn drop(&mut self) {
-        self.shared.closed.store(true, Ordering::Relaxed);
-    }
-}
-
-struct Shared {
+struct Inner {
     closed: AtomicBool,
     waker: AtomicWaker,
 }

src/platform_impl/web/async/dispatcher.rs

@@ -82,6 +82,12 @@ impl<T> Dispatcher<T> {
     }
 }
 
+impl<T> Drop for Dispatcher<T> {
+    fn drop(&mut self) {
+        self.0.with_sender_data(|sender| sender.close())
+    }
+}
+
 pub struct DispatchRunner<T: 'static> {
     wrapper: Wrapper<true, T, AsyncSender<Closure<T>>, Closure<T>>,
     receiver: AsyncReceiver<Closure<T>>,

src/platform_impl/web/async/mod.rs

@@ -3,7 +3,7 @@ mod dispatcher;
 mod waker;
 mod wrapper;
 
-pub use self::channel::{channel, AsyncReceiver, AsyncSender};
+use self::channel::{channel, AsyncReceiver, AsyncSender};
 pub use self::dispatcher::{DispatchRunner, Dispatcher};
 pub use self::waker::{Waker, WakerSpawner};
 use self::wrapper::Wrapper;

src/platform_impl/web/cursor.rs

@@ -1,579 +0,0 @@
-use std::{
-    cell::RefCell,
-    future,
-    hash::{Hash, Hasher},
-    mem,
-    ops::DerefMut,
-    rc::{self, Rc},
-    sync::{self, Arc},
-    task::{Poll, Waker},
-};
-
-use crate::{
-    cursor::{BadImage, CursorImage},
-    platform_impl::platform::r#async,
-};
-use cursor_icon::CursorIcon;
-use once_cell::sync::Lazy;
-use wasm_bindgen::{closure::Closure, JsCast};
-use wasm_bindgen_futures::JsFuture;
-use web_sys::{
-    Blob, Document, HtmlCanvasElement, HtmlImageElement, ImageBitmap, ImageBitmapOptions,
-    ImageBitmapRenderingContext, ImageData, PremultiplyAlpha, Url, Window,
-};
-
-use self::thread_safe::ThreadSafe;
-
-use super::{backend::Style, r#async::AsyncSender, EventLoopWindowTarget};
-
-#[derive(Debug)]
-pub(crate) enum CustomCursorBuilder {
-    Image(CursorImage),
-    Url {
-        url: String,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    },
-}
-
-impl CustomCursorBuilder {
-    pub fn from_rgba(
-        rgba: Vec<u8>,
-        width: u16,
-        height: u16,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    ) -> Result<CustomCursorBuilder, BadImage> {
-        Ok(CustomCursorBuilder::Image(CursorImage::from_rgba(
-            rgba, width, height, hotspot_x, hotspot_y,
-        )?))
-    }
-}
-
-#[derive(Clone, Debug)]
-pub struct CustomCursor(Arc<Inner>);
-
-impl Hash for CustomCursor {
-    fn hash<H: Hasher>(&self, state: &mut H) {
-        Arc::as_ptr(&self.0).hash(state);
-    }
-}
-
-impl PartialEq for CustomCursor {
-    fn eq(&self, other: &Self) -> bool {
-        Arc::ptr_eq(&self.0, &other.0)
-    }
-}
-
-impl Eq for CustomCursor {}
-
-impl CustomCursor {
-    pub(crate) fn build<T>(
-        builder: CustomCursorBuilder,
-        window_target: &EventLoopWindowTarget<T>,
-    ) -> Self {
-        Lazy::force(&DROP_HANDLER);
-
-        Self(match builder {
-            CustomCursorBuilder::Image(image) => ImageState::from_rgba(
-                window_target.runner.window(),
-                window_target.runner.document().clone(),
-                &image,
-            ),
-            CustomCursorBuilder::Url {
-                url,
-                hotspot_x,
-                hotspot_y,
-            } => ImageState::from_url(url, hotspot_x, hotspot_y),
-        })
-    }
-}
-
-#[derive(Debug)]
-struct Inner(Option<ThreadSafe<RefCell<ImageState>>>);
-
-static DROP_HANDLER: Lazy<AsyncSender<ThreadSafe<RefCell<ImageState>>>> = Lazy::new(|| {
-    let (sender, receiver) = r#async::channel();
-    wasm_bindgen_futures::spawn_local(async move { while receiver.next().await.is_ok() {} });
-
-    sender
-});
-
-impl Inner {
-    fn new() -> Arc<Self> {
-        Arc::new(Inner(Some(ThreadSafe::new(RefCell::new(
-            ImageState::Loading(None),
-        )))))
-    }
-
-    fn get(&self) -> &RefCell<ImageState> {
-        self.0
-            .as_ref()
-            .expect("value has accidently already been dropped")
-            .get()
-    }
-}
-
-impl Drop for Inner {
-    fn drop(&mut self) {
-        let value = self
-            .0
-            .take()
-            .expect("value has accidently already been dropped");
-
-        if !value.in_origin_thread() {
-            DROP_HANDLER
-                .send(value)
-                .expect("sender dropped in main thread")
-        }
-    }
-}
-
-#[derive(Debug)]
-pub struct CursorState(Rc<RefCell<State>>);
-
-impl CursorState {
-    pub fn new(style: Style) -> Self {
-        Self(Rc::new(RefCell::new(State {
-            style,
-            visible: true,
-            cursor: SelectedCursor::default(),
-        })))
-    }
-
-    pub fn set_cursor_icon(&self, cursor: CursorIcon) {
-        let mut this = self.0.borrow_mut();
-
-        if let SelectedCursor::ImageLoading { state, .. } = &this.cursor {
-            if let ImageState::Loading(state) = state.get().borrow_mut().deref_mut() {
-                state.take();
-            }
-        }
-
-        this.cursor = SelectedCursor::Named(cursor);
-        this.set_style();
-    }
-
-    pub(crate) fn set_custom_cursor(&self, cursor: CustomCursor) {
-        let mut this = self.0.borrow_mut();
-
-        match cursor.0.get().borrow_mut().deref_mut() {
-            ImageState::Loading(state) => {
-                this.cursor = SelectedCursor::ImageLoading {
-                    state: cursor.0.clone(),
-                    previous: mem::take(&mut this.cursor).into(),
-                };
-                *state = Some(Rc::downgrade(&self.0));
-            }
-            ImageState::Failed => log::error!("tried to load invalid cursor"),
-            ImageState::Ready(image) => {
-                this.cursor = SelectedCursor::ImageReady(image.clone());
-                this.set_style();
-            }
-        }
-    }
-
-    pub fn set_cursor_visible(&self, visible: bool) {
-        let mut state = self.0.borrow_mut();
-
-        if !visible && state.visible {
-            state.visible = false;
-            state.style.set("cursor", "none");
-        } else if visible && !state.visible {
-            state.visible = true;
-            state.set_style();
-        }
-    }
-}
-
-#[derive(Debug)]
-struct State {
-    style: Style,
-    visible: bool,
-    cursor: SelectedCursor,
-}
-
-impl State {
-    pub fn set_style(&self) {
-        if self.visible {
-            let value = match &self.cursor {
-                SelectedCursor::Named(icon) => icon.name(),
-                SelectedCursor::ImageLoading { previous, .. } => previous.style(),
-                SelectedCursor::ImageReady(image) => &image.style,
-            };
-
-            self.style.set("cursor", value);
-        }
-    }
-}
-
-#[derive(Debug)]
-enum SelectedCursor {
-    Named(CursorIcon),
-    ImageLoading {
-        state: Arc<Inner>,
-        previous: Previous,
-    },
-    ImageReady(Rc<Image>),
-}
-
-impl Default for SelectedCursor {
-    fn default() -> Self {
-        Self::Named(Default::default())
-    }
-}
-
-impl From<Previous> for SelectedCursor {
-    fn from(previous: Previous) -> Self {
-        match previous {
-            Previous::Named(icon) => Self::Named(icon),
-            Previous::Image(image) => Self::ImageReady(image),
-        }
-    }
-}
-
-#[derive(Debug)]
-pub enum Previous {
-    Named(CursorIcon),
-    Image(Rc<Image>),
-}
-
-impl Previous {
-    fn style(&self) -> &str {
-        match self {
-            Previous::Named(icon) => icon.name(),
-            Previous::Image(image) => &image.style,
-        }
-    }
-}
-
-impl From<SelectedCursor> for Previous {
-    fn from(value: SelectedCursor) -> Self {
-        match value {
-            SelectedCursor::Named(icon) => Self::Named(icon),
-            SelectedCursor::ImageLoading { previous, .. } => previous,
-            SelectedCursor::ImageReady(image) => Self::Image(image),
-        }
-    }
-}
-
-#[derive(Debug)]
-enum ImageState {
-    Loading(Option<rc::Weak<RefCell<State>>>),
-    Failed,
-    Ready(Rc<Image>),
-}
-
-impl ImageState {
-    fn from_rgba(window: &Window, document: Document, image: &CursorImage) -> Arc<Inner> {
-        // 1. Create an `ImageData` from the RGBA data.
-        // 2. Create an `ImageBitmap` from the `ImageData`.
-        // 3. Draw `ImageBitmap` on an `HTMLCanvasElement`.
-        // 4. Create a `Blob` from the `HTMLCanvasElement`.
-        // 5. Create an object URL from the `Blob`.
-        // 6. Decode the image on an `HTMLImageElement` from the URL.
-        // 7. Change the `CursorState` if queued.
-
-        // 1. Create an `ImageData` from the RGBA data.
-        // Adapted from https://github.com/rust-windowing/softbuffer/blob/ab7688e2ed2e2eca51b3c4e1863a5bd7fe85800e/src/web.rs#L196-L223
-        #[cfg(target_feature = "atomics")]
-        // Can't share `SharedArrayBuffer` with `ImageData`.
-        let result = {
-            use js_sys::{Uint8Array, Uint8ClampedArray};
-            use wasm_bindgen::prelude::wasm_bindgen;
-            use wasm_bindgen::JsValue;
-
-            #[wasm_bindgen]
-            extern "C" {
-                #[wasm_bindgen(js_namespace = ImageData)]
-                type ImageDataExt;
-                #[wasm_bindgen(catch, constructor, js_class = ImageData)]
-                fn new(array: Uint8ClampedArray, sw: u32) -> Result<ImageDataExt, JsValue>;
-            }
-
-            let array = Uint8Array::new_with_length(image.rgba.len() as u32);
-            array.copy_from(&image.rgba);
-            let array = Uint8ClampedArray::new(&array);
-            ImageDataExt::new(array, image.width as u32)
-                .map(JsValue::from)
-                .map(ImageData::unchecked_from_js)
-        };
-        #[cfg(not(target_feature = "atomics"))]
-        let result = ImageData::new_with_u8_clamped_array(
-            wasm_bindgen::Clamped(&image.rgba),
-            image.width as u32,
-        );
-        let image_data = result.expect("found wrong image size");
-
-        // 2. Create an `ImageBitmap` from the `ImageData`.
-        //
-        // We call `createImageBitmap()` before spawning the future,
-        // to not have to clone the image buffer.
-        let mut options = ImageBitmapOptions::new();
-        options.premultiply_alpha(PremultiplyAlpha::None);
-        let bitmap = JsFuture::from(
-            window
-                .create_image_bitmap_with_image_data_and_image_bitmap_options(&image_data, &options)
-                .expect("unexpected exception in `createImageBitmap()`"),
-        );
-
-        let this = Inner::new();
-
-        wasm_bindgen_futures::spawn_local({
-            let weak = Arc::downgrade(&this);
-            let CursorImage {
-                width,
-                height,
-                hotspot_x,
-                hotspot_y,
-                ..
-            } = *image;
-            async move {
-                // Keep checking if all references are dropped between every `await` call.
-                if weak.strong_count() == 0 {
-                    return;
-                }
-
-                let bitmap: ImageBitmap = bitmap
-                    .await
-                    .expect("found invalid state in `ImageData`")
-                    .unchecked_into();
-
-                if weak.strong_count() == 0 {
-                    return;
-                }
-
-                let canvas: HtmlCanvasElement = document
-                    .create_element("canvas")
-                    .expect("invalid tag name")
-                    .unchecked_into();
-                #[allow(clippy::disallowed_methods)]
-                canvas.set_width(width as u32);
-                #[allow(clippy::disallowed_methods)]
-                canvas.set_height(height as u32);
-
-                // 3. Draw `ImageBitmap` on an `HTMLCanvasElement`.
-                let context: ImageBitmapRenderingContext = canvas
-                    .get_context("bitmaprenderer")
-                    .expect("unexpected exception in `HTMLCanvasElement.getContext()`")
-                    .expect("`bitmaprenderer` context unsupported")
-                    .unchecked_into();
-                context.transfer_from_image_bitmap(&bitmap);
-
-                // 4. Create a `Blob` from the `HTMLCanvasElement`.
-                //
-                // To keep the `Closure` alive until `HTMLCanvasElement.toBlob()` is done,
-                // we do the whole `Waker` strategy. Commonly on `Drop` the callback is aborted,
-                // but it would increase complexity and isn't possible in this case.
-                // Keep in mind that `HTMLCanvasElement.toBlob()` can call the callback immediately.
-                let value = Rc::new(RefCell::new(None));
-                let waker = Rc::new(RefCell::<Option<Waker>>::new(None));
-                let callback = Closure::once({
-                    let value = value.clone();
-                    let waker = waker.clone();
-                    move |blob: Option<Blob>| {
-                        *value.borrow_mut() = Some(blob);
-                        if let Some(waker) = waker.borrow_mut().take() {
-                            waker.wake();
-                        }
-                    }
-                });
-                canvas
-                    .to_blob(callback.as_ref().unchecked_ref())
-                    .expect("failed with `SecurityError` despite only source coming from memory");
-                let blob = future::poll_fn(|cx| {
-                    if let Some(blob) = value.borrow_mut().take() {
-                        Poll::Ready(blob)
-                    } else {
-                        *waker.borrow_mut() = Some(cx.waker().clone());
-                        Poll::Pending
-                    }
-                })
-                .await;
-
-                let url = {
-                    let Some(this) = weak.upgrade() else {
-                        return;
-                    };
-                    let mut this = this.get().borrow_mut();
-
-                    let Some(blob) = blob else {
-                        log::error!("creating custom cursor failed");
-                        let ImageState::Loading(state) = this.deref_mut() else {
-                            unreachable!("found invalid state");
-                        };
-                        let state = state.take();
-                        *this = ImageState::Failed;
-
-                        if let Some(state) = state.and_then(|weak| weak.upgrade()) {
-                            let mut state = state.borrow_mut();
-                            let SelectedCursor::ImageLoading { previous, .. } =
-                                mem::take(&mut state.cursor)
-                            else {
-                                unreachable!("found invalid state");
-                            };
-                            state.cursor = previous.into();
-                        }
-
-                        return;
-                    };
-
-                    // 5. Create an object URL from the `Blob`.
-                    Url::create_object_url_with_blob(&blob)
-                        .expect("unexpected exception in `URL.createObjectURL()`")
-                };
-
-                Self::decode(weak, url, true, hotspot_x, hotspot_y).await;
-            }
-        });
-
-        this
-    }
-
-    fn from_url(url: String, hotspot_x: u16, hotspot_y: u16) -> Arc<Inner> {
-        let this = Inner::new();
-        wasm_bindgen_futures::spawn_local(Self::decode(
-            Arc::downgrade(&this),
-            url,
-            false,
-            hotspot_x,
-            hotspot_y,
-        ));
-
-        this
-    }
-
-    async fn decode(
-        weak: sync::Weak<Inner>,
-        url: String,
-        object: bool,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    ) {
-        if weak.strong_count() == 0 {
-            return;
-        }
-
-        // 6. Decode the image on an `HTMLImageElement` from the URL.
-        let image =
-            HtmlImageElement::new().expect("unexpected exception in `new HtmlImageElement`");
-        image.set_src(&url);
-        let result = JsFuture::from(image.decode()).await;
-
-        let Some(this) = weak.upgrade() else {
-            return;
-        };
-        let mut this = this.get().borrow_mut();
-
-        let ImageState::Loading(state) = this.deref_mut() else {
-            unreachable!("found invalid state");
-        };
-        let state = state.take();
-
-        if let Err(error) = result {
-            log::error!("creating custom cursor failed: {error:?}");
-            *this = ImageState::Failed;
-
-            if let Some(state) = state.and_then(|weak| weak.upgrade()) {
-                let mut state = state.borrow_mut();
-                let SelectedCursor::ImageLoading { previous, .. } = mem::take(&mut state.cursor)
-                else {
-                    unreachable!("found invalid state");
-                };
-                state.cursor = previous.into();
-            }
-
-            return;
-        }
-
-        let image = Image::new(url, object, image, hotspot_x, hotspot_y);
-
-        // 7. Change the `CursorState` if queued.
-        if let Some(state) = state.and_then(|weak| weak.upgrade()) {
-            let mut state = state.borrow_mut();
-            state.cursor = SelectedCursor::ImageReady(image.clone());
-            state.set_style();
-        }
-
-        *this = ImageState::Ready(image);
-    }
-}
-
-#[derive(Debug)]
-pub struct Image {
-    style: String,
-    url: String,
-    object: bool,
-    _image: HtmlImageElement,
-}
-
-impl Drop for Image {
-    fn drop(&mut self) {
-        if self.object {
-            Url::revoke_object_url(&self.url)
-                .expect("unexpected exception in `URL.revokeObjectURL()`");
-        }
-    }
-}
-
-impl Image {
-    fn new(
-        url: String,
-        object: bool,
-        image: HtmlImageElement,
-        hotspot_x: u16,
-        hotspot_y: u16,
-    ) -> Rc<Self> {
-        let style = format!("url({url}) {hotspot_x} {hotspot_y}, auto");
-
-        Rc::new(Self {
-            style,
-            url,
-            object,
-            _image: image,
-        })
-    }
-}
-
-mod thread_safe {
-    use std::mem;
-    use std::thread::{self, ThreadId};
-
-    #[derive(Debug)]
-    pub struct ThreadSafe<T> {
-        origin_thread: ThreadId,
-        value: T,
-    }
-
-    impl<T> ThreadSafe<T> {
-        pub fn new(value: T) -> Self {
-            Self {
-                origin_thread: thread::current().id(),
-                value,
-            }
-        }
-
-        pub fn get(&self) -> &T {
-            if self.origin_thread == thread::current().id() {
-                &self.value
-            } else {
-                panic!("value not accessible outside its origin thread")
-            }
-        }
-
-        pub fn in_origin_thread(&self) -> bool {
-            self.origin_thread == thread::current().id()
-        }
-    }
-
-    impl<T> Drop for ThreadSafe<T> {
-        fn drop(&mut self) {
-            if mem::needs_drop::<T>() && self.origin_thread != thread::current().id() {
-                panic!("value can't be dropped outside its origin thread")
-            }
-        }
-    }
-
-    unsafe impl<T> Send for ThreadSafe<T> {}
-    unsafe impl<T> Sync for ThreadSafe<T> {}
-}

src/platform_impl/web/event_loop/runner.rs

@@ -67,6 +67,7 @@ pub struct Execution {
     on_key_press: OnEventHandle<KeyboardEvent>,
     on_key_release: OnEventHandle<KeyboardEvent>,
     on_visibility_change: OnEventHandle<web_sys::Event>,
+    on_touch_end: OnEventHandle<web_sys::Event>,
 }
 
 enum RunnerEnum {
@@ -180,6 +181,7 @@ impl Shared {
                 on_key_press: RefCell::new(None),
                 on_key_release: RefCell::new(None),
                 on_visibility_change: RefCell::new(None),
+                on_touch_end: RefCell::new(None),
             }
         }))
     }
@@ -340,6 +342,8 @@ impl Shared {
             self.window().clone(),
             "pointerdown",
             Closure::new(move |event: PointerEvent| {
+                runner.transient_activation();
+
                 if !runner.device_events() {
                     return;
                 }
@@ -363,6 +367,8 @@ impl Shared {
             self.window().clone(),
             "pointerup",
             Closure::new(move |event: PointerEvent| {
+                runner.transient_activation();
+
                 if !runner.device_events() {
                     return;
                 }
@@ -386,6 +392,8 @@ impl Shared {
             self.window().clone(),
             "keydown",
             Closure::new(move |event: KeyboardEvent| {
+                runner.transient_activation();
+
                 if !runner.device_events() {
                     return;
                 }
@@ -444,6 +452,14 @@ impl Shared {
                 }
             }),
         ));
+        let runner = self.clone();
+        *self.0.on_touch_end.borrow_mut() = Some(EventListenerHandle::new(
+            self.window().clone(),
+            "touchend",
+            Closure::new(move |_| {
+                runner.transient_activation();
+            }),
+        ));
     }
 
     // Generate a strictly increasing ID
@@ -772,6 +788,18 @@ impl Shared {
         }
     }
 
+    fn transient_activation(&self) {
+        self.0
+            .all_canvases
+            .borrow()
+            .iter()
+            .for_each(|(_, canvas, _)| {
+                if let Some(canvas) = canvas.upgrade() {
+                    canvas.borrow().transient_activation();
+                }
+            });
+    }
+
     pub fn event_loop_recreation(&self, allow: bool) {
         self.0.event_loop_recreation.set(allow)
     }

src/platform_impl/web/event_loop/window_target.rs

@@ -83,7 +83,6 @@ impl<T> EventLoopWindowTarget<T> {
     ) {
         let canvas_clone = canvas.clone();
         let mut canvas = canvas.borrow_mut();
-        #[cfg(any(feature = "rwh_04", feature = "rwh_05"))]
         canvas.set_attribute("data-raw-handle", &id.0.to_string());
 
         canvas.on_touch_start(prevent_default);
@@ -649,6 +648,8 @@ impl<T> EventLoopWindowTarget<T> {
         let runner = self.runner.clone();
         canvas.on_animation_frame(move || runner.request_redraw(RootWindowId(id)));
 
+        canvas.on_touch_end();
+
         canvas.on_context_menu(prevent_default);
     }
 

src/platform_impl/web/mod.rs

@@ -18,7 +18,6 @@
 // compliant way.
 
 mod r#async;
-mod cursor;
 mod device;
 mod error;
 mod event_loop;
@@ -35,12 +34,8 @@ pub(crate) use self::event_loop::{
     EventLoop, EventLoopProxy, EventLoopWindowTarget, PlatformSpecificEventLoopAttributes,
 };
 pub use self::monitor::{MonitorHandle, VideoMode};
-pub(crate) use self::window::{
-    OwnedWindowHandle, PlatformSpecificWindowBuilderAttributes, Window, WindowId,
-};
+pub use self::window::{PlatformSpecificWindowBuilderAttributes, Window, WindowId};
 
 pub(crate) use self::keyboard::KeyEventExtra;
 pub(crate) use crate::icon::NoIcon as PlatformIcon;
 pub(crate) use crate::platform_impl::Fullscreen;
-pub(crate) use cursor::CustomCursor as PlatformCustomCursor;
-pub(crate) use cursor::CustomCursorBuilder as PlatformCustomCursorBuilder;

src/platform_impl/web/web_sys/canvas.rs

@@ -1,6 +1,5 @@
 use std::cell::Cell;
-use std::ops::Deref;
-use std::rc::Rc;
+use std::rc::{Rc, Weak};
 use std::sync::{Arc, Mutex};
 
 use smol_str::SmolStr;
@@ -20,10 +19,11 @@ use crate::window::{WindowAttributes, WindowId as RootWindowId};
 use super::super::WindowId;
 use super::animation_frame::AnimationFrameHandler;
 use super::event_handle::EventListenerHandle;
+use super::fullscreen::FullscreenHandler;
 use super::intersection_handle::IntersectionObserverHandle;
 use super::media_query_handle::MediaQueryListHandle;
 use super::pointer::PointerHandler;
-use super::{event, fullscreen, ButtonsState, ResizeScaleHandle};
+use super::{event, ButtonsState, ResizeScaleHandle};
 
 #[allow(dead_code)]
 pub struct Canvas {
@@ -50,17 +50,11 @@ pub struct Common {
     pub window: web_sys::Window,
     pub document: Document,
     /// Note: resizing the HTMLCanvasElement should go through `backend::set_canvas_size` to ensure the DPI factor is maintained.
-    /// Note: this is read-only because we use a pointer to this for [`WindowHandle`](rwh_06::WindowHandle).
-    raw: Rc<HtmlCanvasElement>,
-    style: Style,
+    pub raw: HtmlCanvasElement,
+    style: CssStyleDeclaration,
     old_size: Rc<Cell<PhysicalSize<u32>>>,
     current_size: Rc<Cell<PhysicalSize<u32>>>,
-}
-
-#[derive(Clone, Debug)]
-pub struct Style {
-    read: CssStyleDeclaration,
-    write: CssStyleDeclaration,
+    fullscreen_handler: Rc<FullscreenHandler>,
 }
 
 impl Canvas {
@@ -98,15 +92,21 @@ impl Canvas {
                 .map_err(|_| os_error!(OsError("Failed to set a tabindex".to_owned())))?;
         }
 
-        let style = Style::new(&window, &canvas);
+        #[allow(clippy::disallowed_methods)]
+        let style = window
+            .get_computed_style(&canvas)
+            .expect("Failed to obtain computed style")
+            // this can't fail: we aren't using a pseudo-element
+            .expect("Invalid pseudo-element");
 
         let common = Common {
             window: window.clone(),
             document: document.clone(),
-            raw: Rc::new(canvas.clone()),
+            raw: canvas.clone(),
             style,
             old_size: Rc::default(),
             current_size: Rc::default(),
+            fullscreen_handler: Rc::new(FullscreenHandler::new(document.clone(), canvas.clone())),
         };
 
         if let Some(size) = attr.inner_size {
@@ -130,7 +130,7 @@ impl Canvas {
         }
 
         if attr.fullscreen.0.is_some() {
-            fullscreen::request_fullscreen(&document, &canvas);
+            common.fullscreen_handler.request_fullscreen();
         }
 
         if attr.active {
@@ -181,7 +181,9 @@ impl Canvas {
             y: bounds.y(),
         };
 
-        if self.document().contains(Some(self.raw())) && self.style().get("display") != "none" {
+        if self.document().contains(Some(self.raw()))
+            && self.style().get_property_value("display").unwrap() != "none"
+        {
             position.x += super::style_size_property(self.style(), "border-left-width")
                 + super::style_size_property(self.style(), "padding-left");
             position.y += super::style_size_property(self.style(), "border-top-width")
@@ -227,7 +229,7 @@ impl Canvas {
     }
 
     #[inline]
-    pub fn style(&self) -> &Style {
+    pub fn style(&self) -> &CssStyleDeclaration {
         &self.common.style
     }
 
@@ -283,7 +285,7 @@ impl Canvas {
     where
         F: 'static + FnMut(PhysicalKey, Key, Option<SmolStr>, KeyLocation, bool, ModifiersState),
     {
-        self.on_keyboard_press = Some(self.common.add_event(
+        self.on_keyboard_press = Some(self.common.add_transient_event(
             "keydown",
             move |event: KeyboardEvent| {
                 if prevent_default {
@@ -443,6 +445,10 @@ impl Canvas {
         self.animation_frame_handler.on_animation_frame(f)
     }
 
+    pub(crate) fn on_touch_end(&mut self) {
+        self.on_touch_end = Some(self.common.add_transient_event("touchend", |_| {}));
+    }
+
     pub(crate) fn on_context_menu(&mut self, prevent_default: bool) {
         self.on_context_menu = Some(self.common.add_event(
             "contextmenu",
@@ -455,15 +461,15 @@ impl Canvas {
     }
 
     pub fn request_fullscreen(&self) {
-        fullscreen::request_fullscreen(self.document(), self.raw());
+        self.common.fullscreen_handler.request_fullscreen()
     }
 
     pub fn exit_fullscreen(&self) {
-        fullscreen::exit_fullscreen(self.document(), self.raw());
+        self.common.fullscreen_handler.exit_fullscreen()
     }
 
     pub fn is_fullscreen(&self) -> bool {
-        fullscreen::is_fullscreen(self.document(), self.raw())
+        self.common.fullscreen_handler.is_fullscreen()
     }
 
     pub fn request_animation_frame(&self) {
@@ -514,6 +520,10 @@ impl Canvas {
         }
     }
 
+    pub(crate) fn transient_activation(&self) {
+        self.common.fullscreen_handler.transient_activation()
+    }
+
     pub fn remove_listeners(&mut self) {
         self.on_touch_start = None;
         self.on_focus = None;
@@ -527,6 +537,7 @@ impl Canvas {
         self.on_intersect = None;
         self.animation_frame_handler.cancel();
         self.on_touch_end = None;
+        self.common.fullscreen_handler.cancel();
         self.on_context_menu = None;
     }
 }
@@ -541,44 +552,29 @@ impl Common {
         E: 'static + AsRef<web_sys::Event> + wasm_bindgen::convert::FromWasmAbi,
         F: 'static + FnMut(E),
     {
-        EventListenerHandle::new(self.raw.deref().clone(), event_name, Closure::new(handler))
+        EventListenerHandle::new(self.raw.clone(), event_name, Closure::new(handler))
     }
 
-    pub fn raw(&self) -> &HtmlCanvasElement {
-        &self.raw
-    }
-}
-
-impl Style {
-    fn new(window: &web_sys::Window, canvas: &HtmlCanvasElement) -> Self {
-        #[allow(clippy::disallowed_methods)]
-        let read = window
-            .get_computed_style(canvas)
-            .expect("Failed to obtain computed style")
-            // this can't fail: we aren't using a pseudo-element
-            .expect("Invalid pseudo-element");
-
-        #[allow(clippy::disallowed_methods)]
-        let write = canvas.style();
-
-        Self { read, write }
-    }
-
-    pub(crate) fn get(&self, property: &str) -> String {
-        self.read
-            .get_property_value(property)
-            .expect("Invalid property")
-    }
-
-    pub(crate) fn remove(&self, property: &str) {
-        self.write
-            .remove_property(property)
-            .expect("Property is read only");
-    }
-
-    pub(crate) fn set(&self, property: &str, value: &str) {
-        self.write
-            .set_property(property, value)
-            .expect("Property is read only");
+    // The difference between add_event and add_user_event is that the latter has a special meaning
+    // for browser security. A user event is a deliberate action by the user (like a mouse or key
+    // press) and is the only time things like a fullscreen request may be successfully completed.)
+    pub fn add_transient_event<E, F>(
+        &self,
+        event_name: &'static str,
+        mut handler: F,
+    ) -> EventListenerHandle<dyn FnMut(E)>
+    where
+        E: 'static + AsRef<web_sys::Event> + wasm_bindgen::convert::FromWasmAbi,
+        F: 'static + FnMut(E),
+    {
+        let fullscreen_handler = Rc::downgrade(&self.fullscreen_handler);
+
+        self.add_event(event_name, move |event: E| {
+            handler(event);
+
+            if let Some(fullscreen_handler) = Weak::upgrade(&fullscreen_handler) {
+                fullscreen_handler.transient_activation()
+            }
+        })
     }
 }

src/platform_impl/web/web_sys/event.rs

@@ -2,8 +2,8 @@ use crate::dpi::LogicalPosition;
 use crate::event::{MouseButton, MouseScrollDelta};
 use crate::keyboard::{Key, KeyLocation, ModifiersState, NamedKey, PhysicalKey};
 
+use once_cell::unsync::OnceCell;
 use smol_str::SmolStr;
-use std::cell::OnceCell;
 use std::convert::TryInto;
 use wasm_bindgen::prelude::wasm_bindgen;
 use wasm_bindgen::{JsCast, JsValue};

src/platform_impl/web/web_sys/fullscreen.rs

@@ -1,91 +1,145 @@
-use std::cell::OnceCell;
+use std::cell::Cell;
+use std::rc::Rc;
 
 use js_sys::Promise;
+use once_cell::unsync::OnceCell;
 use wasm_bindgen::closure::Closure;
 use wasm_bindgen::prelude::wasm_bindgen;
 use wasm_bindgen::{JsCast, JsValue};
 use web_sys::{Document, Element, HtmlCanvasElement};
 
-pub fn request_fullscreen(document: &Document, canvas: &HtmlCanvasElement) {
-    if is_fullscreen(document, canvas) {
-        return;
-    }
+use super::EventListenerHandle;
 
-    #[wasm_bindgen]
-    extern "C" {
-        #[wasm_bindgen(extends = HtmlCanvasElement)]
-        type RequestFullscreen;
-
-        #[wasm_bindgen(method, js_name = requestFullscreen)]
-        fn request_fullscreen(this: &RequestFullscreen) -> Promise;
-
-        #[wasm_bindgen(method, js_name = webkitRequestFullscreen)]
-        fn webkit_request_fullscreen(this: &RequestFullscreen);
-    }
-
-    let canvas: &RequestFullscreen = canvas.unchecked_ref();
-
-    if has_fullscreen_api_support(canvas) {
-        thread_local! {
-            static REJECT_HANDLER: Closure<dyn FnMut(JsValue)> = Closure::new(|_| ());
-        }
-        REJECT_HANDLER.with(|handler| {
-            let _ = canvas.request_fullscreen().catch(handler);
-        });
-    } else {
-        canvas.webkit_request_fullscreen();
-    }
+thread_local! {
+    static FULLSCREEN_API_SUPPORT: OnceCell<bool> = OnceCell::new();
 }
 
-pub fn is_fullscreen(document: &Document, canvas: &HtmlCanvasElement) -> bool {
-    #[wasm_bindgen]
-    extern "C" {
-        type FullscreenElement;
-
-        #[wasm_bindgen(method, getter, js_name = webkitFullscreenElement)]
-        fn webkit_fullscreen_element(this: &FullscreenElement) -> Option<Element>;
-    }
-
-    let element = if has_fullscreen_api_support(canvas) {
-        #[allow(clippy::disallowed_methods)]
-        document.fullscreen_element()
-    } else {
-        let document: &FullscreenElement = document.unchecked_ref();
-        document.webkit_fullscreen_element()
-    };
-
-    match element {
-        Some(element) => {
-            let canvas: &Element = canvas;
-            canvas == &element
-        }
-        None => false,
-    }
+pub struct FullscreenHandler {
+    document: Document,
+    canvas: HtmlCanvasElement,
+    fullscreen_requested: Rc<Cell<bool>>,
+    _fullscreen_change: EventListenerHandle<dyn FnMut()>,
 }
 
-pub fn exit_fullscreen(document: &Document, canvas: &HtmlCanvasElement) {
-    #[wasm_bindgen]
-    extern "C" {
-        type ExitFullscreen;
+impl FullscreenHandler {
+    pub fn new(document: Document, canvas: HtmlCanvasElement) -> Self {
+        let fullscreen_requested = Rc::new(Cell::new(false));
+        let fullscreen_change = EventListenerHandle::new(
+            canvas.clone(),
+            if has_fullscreen_api_support(&canvas) {
+                "fullscreenchange"
+            } else {
+                "webkitfullscreenchange"
+            },
+            Closure::new({
+                let fullscreen_requested = fullscreen_requested.clone();
+                move || {
+                    // It doesn't matter if the canvas entered or exitted fullscreen mode,
+                    // we don't want to request it again later.
+                    fullscreen_requested.set(false);
+                }
+            }),
+        );
 
-        #[wasm_bindgen(method, js_name = webkitExitFullscreen)]
-        fn webkit_exit_fullscreen(this: &ExitFullscreen);
+        Self {
+            document,
+            canvas,
+            fullscreen_requested,
+            _fullscreen_change: fullscreen_change,
+        }
     }
 
-    if has_fullscreen_api_support(canvas) {
-        #[allow(clippy::disallowed_methods)]
-        document.exit_fullscreen()
-    } else {
-        let document: &ExitFullscreen = document.unchecked_ref();
-        document.webkit_exit_fullscreen()
+    fn internal_request_fullscreen(&self) {
+        #[wasm_bindgen]
+        extern "C" {
+            type RequestFullscreen;
+
+            #[wasm_bindgen(method, js_name = requestFullscreen)]
+            fn request_fullscreen(this: &RequestFullscreen) -> Promise;
+
+            #[wasm_bindgen(method, js_name = webkitRequestFullscreen)]
+            fn webkit_request_fullscreen(this: &RequestFullscreen);
+        }
+
+        let canvas: &RequestFullscreen = self.canvas.unchecked_ref();
+
+        if has_fullscreen_api_support(&self.canvas) {
+            thread_local! {
+                static REJECT_HANDLER: Closure<dyn FnMut(JsValue)> = Closure::new(|_| ());
+            }
+            REJECT_HANDLER.with(|handler| {
+                let _ = canvas.request_fullscreen().catch(handler);
+            });
+        } else {
+            canvas.webkit_request_fullscreen();
+        }
+    }
+
+    pub fn request_fullscreen(&self) {
+        if !self.is_fullscreen() {
+            self.internal_request_fullscreen();
+            self.fullscreen_requested.set(true);
+        }
+    }
+
+    pub fn transient_activation(&self) {
+        if self.fullscreen_requested.get() {
+            self.internal_request_fullscreen()
+        }
+    }
+
+    pub fn is_fullscreen(&self) -> bool {
+        #[wasm_bindgen]
+        extern "C" {
+            type FullscreenElement;
+
+            #[wasm_bindgen(method, getter, js_name = webkitFullscreenElement)]
+            fn webkit_fullscreen_element(this: &FullscreenElement) -> Option<Element>;
+        }
+
+        let element = if has_fullscreen_api_support(&self.canvas) {
+            #[allow(clippy::disallowed_methods)]
+            self.document.fullscreen_element()
+        } else {
+            let document: &FullscreenElement = self.document.unchecked_ref();
+            document.webkit_fullscreen_element()
+        };
+
+        match element {
+            Some(element) => {
+                let canvas: &Element = &self.canvas;
+                canvas == &element
+            }
+            None => false,
+        }
+    }
+
+    pub fn exit_fullscreen(&self) {
+        #[wasm_bindgen]
+        extern "C" {
+            type ExitFullscreen;
+
+            #[wasm_bindgen(method, js_name = webkitExitFullscreen)]
+            fn webkit_exit_fullscreen(this: &ExitFullscreen);
+        }
+
+        if has_fullscreen_api_support(&self.canvas) {
+            #[allow(clippy::disallowed_methods)]
+            self.document.exit_fullscreen()
+        } else {
+            let document: &ExitFullscreen = self.document.unchecked_ref();
+            document.webkit_exit_fullscreen()
+        }
+
+        self.fullscreen_requested.set(false);
+    }
+
+    pub fn cancel(&self) {
+        self.fullscreen_requested.set(false);
     }
 }
 
 fn has_fullscreen_api_support(canvas: &HtmlCanvasElement) -> bool {
-    thread_local! {
-        static FULLSCREEN_API_SUPPORT: OnceCell<bool> = OnceCell::new();
-    }
-
     FULLSCREEN_API_SUPPORT.with(|support| {
         *support.get_or_init(|| {
             #[wasm_bindgen]

src/platform_impl/web/web_sys/mod.rs

@@ -10,7 +10,6 @@ mod resize_scaling;
 mod schedule;
 
 pub use self::canvas::Canvas;
-pub use self::canvas::Style;
 pub use self::event::ButtonsState;
 pub use self::event_handle::EventListenerHandle;
 pub use self::resize_scaling::ResizeScaleHandle;
@@ -18,7 +17,9 @@ pub use self::schedule::Schedule;
 
 use crate::dpi::{LogicalPosition, LogicalSize};
 use wasm_bindgen::closure::Closure;
-use web_sys::{Document, HtmlCanvasElement, PageTransitionEvent, VisibilityState};
+use web_sys::{
+    CssStyleDeclaration, Document, HtmlCanvasElement, PageTransitionEvent, VisibilityState,
+};
 
 pub fn throw(msg: &str) {
     wasm_bindgen::throw_str(msg);
@@ -50,8 +51,8 @@ pub fn scale_factor(window: &web_sys::Window) -> f64 {
     window.device_pixel_ratio()
 }
 
-fn fix_canvas_size(style: &Style, mut size: LogicalSize<f64>) -> LogicalSize<f64> {
-    if style.get("box-sizing") == "border-box" {
+fn fix_canvas_size(style: &CssStyleDeclaration, mut size: LogicalSize<f64>) -> LogicalSize<f64> {
+    if style.get_property_value("box-sizing").unwrap() == "border-box" {
         size.width += style_size_property(style, "border-left-width")
             + style_size_property(style, "border-right-width")
             + style_size_property(style, "padding-left")
@@ -68,68 +69,76 @@ fn fix_canvas_size(style: &Style, mut size: LogicalSize<f64>) -> LogicalSize<f64
 pub fn set_canvas_size(
     document: &Document,
     raw: &HtmlCanvasElement,
-    style: &Style,
+    style: &CssStyleDeclaration,
     new_size: LogicalSize<f64>,
 ) {
-    if !document.contains(Some(raw)) || style.get("display") == "none" {
+    if !document.contains(Some(raw)) || style.get_property_value("display").unwrap() == "none" {
         return;
     }
 
     let new_size = fix_canvas_size(style, new_size);
 
-    style.set("width", &format!("{}px", new_size.width));
-    style.set("height", &format!("{}px", new_size.height));
+    set_canvas_style_property(raw, "width", &format!("{}px", new_size.width));
+    set_canvas_style_property(raw, "height", &format!("{}px", new_size.height));
 }
 
 pub fn set_canvas_min_size(
     document: &Document,
     raw: &HtmlCanvasElement,
-    style: &Style,
+    style: &CssStyleDeclaration,
     dimensions: Option<LogicalSize<f64>>,
 ) {
     if let Some(dimensions) = dimensions {
-        if !document.contains(Some(raw)) || style.get("display") == "none" {
+        if !document.contains(Some(raw)) || style.get_property_value("display").unwrap() == "none" {
             return;
         }
 
         let new_size = fix_canvas_size(style, dimensions);
 
-        style.set("min-width", &format!("{}px", new_size.width));
-        style.set("min-height", &format!("{}px", new_size.height));
+        set_canvas_style_property(raw, "min-width", &format!("{}px", new_size.width));
+        set_canvas_style_property(raw, "min-height", &format!("{}px", new_size.height));
     } else {
-        style.remove("min-width");
-        style.remove("min-height");
+        style
+            .remove_property("min-width")
+            .expect("Property is read only");
+        style
+            .remove_property("min-height")
+            .expect("Property is read only");
     }
 }
 
 pub fn set_canvas_max_size(
     document: &Document,
     raw: &HtmlCanvasElement,
-    style: &Style,
+    style: &CssStyleDeclaration,
     dimensions: Option<LogicalSize<f64>>,
 ) {
     if let Some(dimensions) = dimensions {
-        if !document.contains(Some(raw)) || style.get("display") == "none" {
+        if !document.contains(Some(raw)) || style.get_property_value("display").unwrap() == "none" {
             return;
         }
 
         let new_size = fix_canvas_size(style, dimensions);
 
-        style.set("max-width", &format!("{}px", new_size.width));
-        style.set("max-height", &format!("{}px", new_size.height));
+        set_canvas_style_property(raw, "max-width", &format!("{}px", new_size.width));
+        set_canvas_style_property(raw, "max-height", &format!("{}px", new_size.height));
     } else {
-        style.remove("max-width");
-        style.remove("max-height");
+        style
+            .remove_property("max-width")
+            .expect("Property is read only");
+        style
+            .remove_property("max-height")
+            .expect("Property is read only");
     }
 }
 
 pub fn set_canvas_position(
     document: &Document,
     raw: &HtmlCanvasElement,
-    style: &Style,
+    style: &CssStyleDeclaration,
     mut position: LogicalPosition<f64>,
 ) {
-    if document.contains(Some(raw)) && style.get("display") != "none" {
+    if document.contains(Some(raw)) && style.get_property_value("display").unwrap() != "none" {
         position.x -= style_size_property(style, "margin-left")
             + style_size_property(style, "border-left-width")
             + style_size_property(style, "padding-left");
@@ -138,21 +147,30 @@ pub fn set_canvas_position(
             + style_size_property(style, "padding-top");
     }
 
-    style.set("position", "fixed");
-    style.set("left", &format!("{}px", position.x));
-    style.set("top", &format!("{}px", position.y));
+    set_canvas_style_property(raw, "position", "fixed");
+    set_canvas_style_property(raw, "left", &format!("{}px", position.x));
+    set_canvas_style_property(raw, "top", &format!("{}px", position.y));
 }
 
 /// This function will panic if the element is not inserted in the DOM
 /// or is not a CSS property that represents a size in pixel.
-pub fn style_size_property(style: &Style, property: &str) -> f64 {
-    let prop = style.get(property);
+pub fn style_size_property(style: &CssStyleDeclaration, property: &str) -> f64 {
+    let prop = style
+        .get_property_value(property)
+        .expect("Found invalid property");
     prop.strip_suffix("px")
         .expect("Element was not inserted into the DOM or is not a size in pixel")
         .parse()
         .expect("CSS property is not a size in pixel")
 }
 
+pub fn set_canvas_style_property(raw: &HtmlCanvasElement, property: &str, value: &str) {
+    let style = raw.style();
+    style
+        .set_property(property, value)
+        .unwrap_or_else(|err| panic!("error: {err:?}\nFailed to set {property}"))
+}
+
 pub fn is_dark_mode(window: &web_sys::Window) -> Option<bool> {
     window
         .match_media("(prefers-color-scheme: dark)")

src/platform_impl/web/web_sys/pointer.rs

@@ -80,7 +80,7 @@ impl PointerHandler {
         T: 'static + FnMut(ModifiersState, i32, PhysicalPosition<f64>, Force),
     {
         let window = canvas_common.window.clone();
-        self.on_pointer_release = Some(canvas_common.add_event(
+        self.on_pointer_release = Some(canvas_common.add_transient_event(
             "pointerup",
             move |event: PointerEvent| {
                 let modifiers = event::mouse_modifiers(&event);
@@ -117,8 +117,8 @@ impl PointerHandler {
         T: 'static + FnMut(ModifiersState, i32, PhysicalPosition<f64>, Force),
     {
         let window = canvas_common.window.clone();
-        let canvas = canvas_common.raw().clone();
-        self.on_pointer_press = Some(canvas_common.add_event(
+        let canvas = canvas_common.raw.clone();
+        self.on_pointer_press = Some(canvas_common.add_transient_event(
             "pointerdown",
             move |event: PointerEvent| {
                 if prevent_default {
@@ -174,7 +174,7 @@ impl PointerHandler {
         B: 'static + FnMut(ModifiersState, i32, PhysicalPosition<f64>, ButtonsState, MouseButton),
     {
         let window = canvas_common.window.clone();
-        let canvas = canvas_common.raw().clone();
+        let canvas = canvas_common.raw.clone();
         self.on_cursor_move = Some(canvas_common.add_event(
             "pointermove",
             move |event: PointerEvent| {

src/platform_impl/web/web_sys/resize_scaling.rs

@@ -2,14 +2,14 @@ use js_sys::{Array, Object};
 use wasm_bindgen::prelude::{wasm_bindgen, Closure};
 use wasm_bindgen::{JsCast, JsValue};
 use web_sys::{
-    Document, HtmlCanvasElement, MediaQueryList, ResizeObserver, ResizeObserverBoxOptions,
-    ResizeObserverEntry, ResizeObserverOptions, ResizeObserverSize, Window,
+    CssStyleDeclaration, Document, HtmlCanvasElement, MediaQueryList, ResizeObserver,
+    ResizeObserverBoxOptions, ResizeObserverEntry, ResizeObserverOptions, ResizeObserverSize,
+    Window,
 };
 
 use crate::dpi::{LogicalSize, PhysicalSize};
 
 use super::super::backend;
-use super::canvas::Style;
 use super::media_query_handle::MediaQueryListHandle;
 
 use std::cell::{Cell, RefCell};
@@ -22,7 +22,7 @@ impl ResizeScaleHandle {
         window: Window,
         document: Document,
         canvas: HtmlCanvasElement,
-        style: Style,
+        style: CssStyleDeclaration,
         scale_handler: S,
         resize_handler: R,
     ) -> Self
@@ -51,7 +51,7 @@ struct ResizeScaleInternal {
     window: Window,
     document: Document,
     canvas: HtmlCanvasElement,
-    style: Style,
+    style: CssStyleDeclaration,
     mql: MediaQueryListHandle,
     observer: ResizeObserver,
     _observer_closure: Closure<dyn FnMut(Array, ResizeObserver)>,
@@ -65,7 +65,7 @@ impl ResizeScaleInternal {
         window: Window,
         document: Document,
         canvas: HtmlCanvasElement,
-        style: Style,
+        style: CssStyleDeclaration,
         scale_handler: S,
         resize_handler: R,
     ) -> Rc<RefCell<Self>>
@@ -152,7 +152,9 @@ impl ResizeScaleInternal {
     }
 
     fn notify(&mut self) {
-        if !self.document.contains(Some(&self.canvas)) || self.style.get("display") == "none" {
+        if !self.document.contains(Some(&self.canvas))
+            || self.style.get_property_value("display").unwrap() == "none"
+        {
             let size = PhysicalSize::new(0, 0);
 
             if self.notify_scale.replace(false) {
@@ -178,7 +180,7 @@ impl ResizeScaleInternal {
             backend::style_size_property(&self.style, "height"),
         );
 
-        if self.style.get("box-sizing") == "border-box" {
+        if self.style.get_property_value("box-sizing").unwrap() == "border-box" {
             size.width -= backend::style_size_property(&self.style, "border-left-width")
                 + backend::style_size_property(&self.style, "border-right-width")
                 + backend::style_size_property(&self.style, "padding-left")
@@ -244,7 +246,10 @@ impl ResizeScaleInternal {
             .get(0)
             .unchecked_into();
 
-        let writing_mode = self.style.get("writing-mode");
+        let writing_mode = self
+            .style
+            .get_property_value("writing-mode")
+            .expect("`writing-mode` is a valid CSS property");
 
         // means the canvas is not inserted into the DOM
         if writing_mode.is_empty() {

src/platform_impl/web/web_sys/schedule.rs

@@ -1,5 +1,5 @@
 use js_sys::{Function, Object, Promise, Reflect};
-use std::cell::OnceCell;
+use once_cell::unsync::OnceCell;
 use std::time::Duration;
 use wasm_bindgen::closure::Closure;
 use wasm_bindgen::prelude::wasm_bindgen;

src/platform_impl/web/window.rs

@@ -7,28 +7,15 @@ use crate::window::{
 };
 use crate::SendSyncWrapper;
 
-use super::cursor::CursorState;
-use super::r#async::Dispatcher;
-use super::PlatformCustomCursor;
-use super::{backend, monitor::MonitorHandle, EventLoopWindowTarget, Fullscreen};
 use web_sys::HtmlCanvasElement;
 
+use super::r#async::Dispatcher;
+use super::{backend, monitor::MonitorHandle, EventLoopWindowTarget, Fullscreen};
+
 use std::cell::RefCell;
 use std::collections::VecDeque;
 use std::rc::Rc;
 
-#[derive(Debug, Clone)]
-pub(crate) struct OwnedWindowHandle {}
-
-impl OwnedWindowHandle {
-    #[cfg(feature = "rwh_06")]
-    pub(crate) fn new_parent_window(_handle: rwh_06::WindowHandle<'_>) -> Self {
-        // Parent windows are currently unsupported, though owned window
-        // handles would be implementable.
-        Self {}
-    }
-}
-
 pub struct Window {
     inner: Dispatcher<Inner>,
 }
@@ -37,7 +24,7 @@ pub struct Inner {
     id: WindowId,
     pub window: web_sys::Window,
     canvas: Rc<RefCell<backend::Canvas>>,
-    cursor: CursorState,
+    previous_pointer: RefCell<&'static str>,
     destroy_fn: Option<Box<dyn FnOnce()>>,
 }
 
@@ -56,7 +43,6 @@ impl Window {
         let canvas =
             backend::Canvas::create(id, window.clone(), document.clone(), &attr, platform_attr)?;
         let canvas = Rc::new(RefCell::new(canvas));
-        let cursor = CursorState::new(canvas.borrow().style().clone());
 
         target.register(&canvas, id, prevent_default);
 
@@ -67,7 +53,7 @@ impl Window {
             id,
             window: window.clone(),
             canvas,
-            cursor,
+            previous_pointer: RefCell::new("auto"),
             destroy_fn: Some(destroy_fn),
         };
 
@@ -96,22 +82,6 @@ impl Window {
             .value()
             .map(|inner| inner.canvas.borrow().raw().clone())
     }
-
-    #[cfg(feature = "rwh_06")]
-    #[inline]
-    pub fn raw_window_handle_rwh_06(&self) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
-        self.inner
-            .value()
-            .map(|inner| {
-                let canvas = inner.canvas.borrow();
-                // SAFETY: This will only work if the reference to `HtmlCanvasElement` stays valid.
-                let canvas: &wasm_bindgen::JsValue = canvas.raw();
-                let window_handle =
-                    rwh_06::WebCanvasWindowHandle::new(std::ptr::NonNull::from(canvas).cast());
-                rwh_06::RawWindowHandle::WebCanvas(window_handle)
-            })
-            .ok_or(rwh_06::HandleError::Unavailable)
-    }
 }
 
 impl Inner {
@@ -225,12 +195,8 @@ impl Inner {
 
     #[inline]
     pub fn set_cursor_icon(&self, cursor: CursorIcon) {
-        self.cursor.set_cursor_icon(cursor)
-    }
-
-    #[inline]
-    pub(crate) fn set_custom_cursor(&self, cursor: PlatformCustomCursor) {
-        self.cursor.set_custom_cursor(cursor)
+        *self.previous_pointer.borrow_mut() = cursor.name();
+        backend::set_canvas_style_property(self.canvas.borrow().raw(), "cursor", cursor.name());
     }
 
     #[inline]
@@ -256,7 +222,15 @@ impl Inner {
 
     #[inline]
     pub fn set_cursor_visible(&self, visible: bool) {
-        self.cursor.set_cursor_visible(visible)
+        if !visible {
+            backend::set_canvas_style_property(self.canvas.borrow().raw(), "cursor", "none");
+        } else {
+            backend::set_canvas_style_property(
+                self.canvas.borrow().raw(),
+                "cursor",
+                &self.previous_pointer.borrow(),
+            );
+        }
     }
 
     #[inline]
@@ -405,6 +379,13 @@ impl Inner {
         rwh_05::RawDisplayHandle::Web(rwh_05::WebDisplayHandle::empty())
     }
 
+    #[cfg(feature = "rwh_06")]
+    #[inline]
+    pub fn raw_window_handle_rwh_06(&self) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
+        let window_handle = rwh_06::WebWindowHandle::new(self.id.0);
+        Ok(rwh_06::RawWindowHandle::Web(window_handle))
+    }
+
     #[cfg(feature = "rwh_06")]
     #[inline]
     pub fn raw_display_handle_rwh_06(

src/platform_impl/windows/event_loop.rs

@@ -96,7 +96,7 @@ use runner::{EventLoopRunner, EventLoopRunnerShared};
 
 use self::runner::RunnerState;
 
-use super::{window::set_skip_taskbar, SelectedCursor};
+use super::window::set_skip_taskbar;
 
 pub(crate) struct WindowData<T: 'static> {
     pub window_state: Arc<Mutex<WindowState>>,
@@ -530,6 +530,10 @@ impl<T> EventLoopWindowTarget<T> {
         self.runner_shared.exit_code().is_some()
     }
 
+    pub(crate) fn clear_exit(&self) {
+        self.runner_shared.clear_exit();
+    }
+
     fn exit_code(&self) -> Option<i32> {
         self.runner_shared.exit_code()
     }
@@ -1975,21 +1979,16 @@ unsafe fn public_window_callback_inner<T: 'static>(
                 // `WM_MOUSEMOVE` seems to come after `WM_SETCURSOR` for a given cursor movement.
                 let in_client_area = super::loword(lparam as u32) as u32 == HTCLIENT;
                 if in_client_area {
-                    Some(window_state.mouse.selected_cursor.clone())
+                    Some(window_state.mouse.cursor)
                 } else {
                     None
                 }
             };
 
             match set_cursor_to {
-                Some(selected_cursor) => {
-                    let hcursor = match selected_cursor {
-                        SelectedCursor::Named(cursor_icon) => unsafe {
-                            LoadCursorW(0, util::to_windows_cursor(cursor_icon))
-                        },
-                        SelectedCursor::Custom(cursor) => cursor.as_raw_handle(),
-                    };
-                    unsafe { SetCursor(hcursor) };
+                Some(cursor) => {
+                    let cursor = unsafe { LoadCursorW(0, util::to_windows_cursor(cursor)) };
+                    unsafe { SetCursor(cursor) };
                     result = ProcResult::Value(0);
                 }
                 None => result = ProcResult::DefWindowProc(wparam),

src/platform_impl/windows/event_loop/runner.rs

@@ -163,6 +163,10 @@ impl<T> EventLoopRunner<T> {
         self.exit.get()
     }
 
+    pub fn clear_exit(&self) {
+        self.exit.set(None);
+    }
+
     pub fn should_buffer(&self) -> bool {
         let handler = self.event_handler.take();
         let should_buffer = handler.is_none();

src/platform_impl/windows/icon.rs

@@ -1,23 +1,18 @@
-use std::{ffi::c_void, fmt, io, mem, path::Path, sync::Arc};
+use std::{fmt, io, mem, path::Path, sync::Arc};
 
-use cursor_icon::CursorIcon;
 use windows_sys::{
     core::PCWSTR,
     Win32::{
         Foundation::HWND,
-        Graphics::Gdi::{
-            CreateBitmap, CreateCompatibleBitmap, DeleteObject, GetDC, ReleaseDC, SetBitmapBits,
-        },
         UI::WindowsAndMessaging::{
-            CreateIcon, CreateIconIndirect, DestroyCursor, DestroyIcon, LoadImageW, SendMessageW,
-            HCURSOR, HICON, ICONINFO, ICON_BIG, ICON_SMALL, IMAGE_ICON, LR_DEFAULTSIZE,
-            LR_LOADFROMFILE, WM_SETICON,
+            CreateIcon, DestroyIcon, LoadImageW, SendMessageW, HICON, ICON_BIG, ICON_SMALL,
+            IMAGE_ICON, LR_DEFAULTSIZE, LR_LOADFROMFILE, WM_SETICON,
         },
     },
 };
 
+use crate::dpi::PhysicalSize;
 use crate::icon::*;
-use crate::{cursor::CursorImage, dpi::PhysicalSize};
 
 use super::util;
 
@@ -165,92 +160,3 @@ pub fn unset_for_window(hwnd: HWND, icon_type: IconType) {
         SendMessageW(hwnd, WM_SETICON, icon_type as usize, 0);
     }
 }
-
-#[derive(Debug, Clone)]
-pub enum SelectedCursor {
-    Named(CursorIcon),
-    Custom(WinCursor),
-}
-
-impl Default for SelectedCursor {
-    fn default() -> Self {
-        Self::Named(Default::default())
-    }
-}
-
-#[derive(Clone, Debug)]
-pub struct WinCursor {
-    inner: Arc<RaiiCursor>,
-}
-
-impl WinCursor {
-    pub fn as_raw_handle(&self) -> HICON {
-        self.inner.handle
-    }
-
-    fn from_handle(handle: HCURSOR) -> Self {
-        Self {
-            inner: Arc::new(RaiiCursor { handle }),
-        }
-    }
-
-    pub(crate) fn new(image: &CursorImage) -> Result<Self, io::Error> {
-        let mut bgra = image.rgba.clone();
-        bgra.chunks_exact_mut(4).for_each(|chunk| chunk.swap(0, 2));
-
-        let w = image.width as i32;
-        let h = image.height as i32;
-
-        unsafe {
-            let hdc_screen = GetDC(0);
-            if hdc_screen == 0 {
-                return Err(io::Error::last_os_error());
-            }
-            let hbm_color = CreateCompatibleBitmap(hdc_screen, w, h);
-            ReleaseDC(0, hdc_screen);
-            if hbm_color == 0 {
-                return Err(io::Error::last_os_error());
-            }
-            if SetBitmapBits(hbm_color, bgra.len() as u32, bgra.as_ptr() as *const c_void) == 0 {
-                DeleteObject(hbm_color);
-                return Err(io::Error::last_os_error());
-            };
-
-            // Mask created according to https://learn.microsoft.com/en-us/windows/win32/api/wingdi/nf-wingdi-createbitmap#parameters
-            let mask_bits: Vec<u8> = vec![0xff; ((((w + 15) >> 4) << 1) * h) as usize];
-            let hbm_mask = CreateBitmap(w, h, 1, 1, mask_bits.as_ptr() as *const _);
-            if hbm_mask == 0 {
-                DeleteObject(hbm_color);
-                return Err(io::Error::last_os_error());
-            }
-
-            let icon_info = ICONINFO {
-                fIcon: 0,
-                xHotspot: image.hotspot_x as u32,
-                yHotspot: image.hotspot_y as u32,
-                hbmMask: hbm_mask,
-                hbmColor: hbm_color,
-            };
-
-            let handle = CreateIconIndirect(&icon_info as *const _);
-            DeleteObject(hbm_color);
-            DeleteObject(hbm_mask);
-            if handle == 0 {
-                return Err(io::Error::last_os_error());
-            }
-
-            Ok(Self::from_handle(handle))
-        }
-    }
-}
-
-#[derive(Debug)]
-struct RaiiCursor {
-    handle: HCURSOR,
-}
-
-impl Drop for RaiiCursor {
-    fn drop(&mut self) {
-        unsafe { DestroyCursor(self.handle) };
-    }
-}

src/platform_impl/windows/mod.rs

@@ -10,14 +10,12 @@ pub(crate) use self::{
     event_loop::{
         EventLoop, EventLoopProxy, EventLoopWindowTarget, PlatformSpecificEventLoopAttributes,
     },
-    icon::{SelectedCursor, WinIcon},
+    icon::WinIcon,
     monitor::{MonitorHandle, VideoMode},
-    window::{OwnedWindowHandle, Window},
+    window::Window,
 };
 
 pub use self::icon::WinIcon as PlatformIcon;
-pub(crate) use crate::cursor::OnlyCursorImage as PlatformCustomCursor;
-pub(crate) use crate::cursor::OnlyCursorImageBuilder as PlatformCustomCursorBuilder;
 use crate::platform_impl::Fullscreen;
 
 use crate::event::DeviceId as RootDeviceId;

src/platform_impl/windows/window.rs

@@ -66,14 +66,13 @@ use crate::{
         dpi::{dpi_to_scale_factor, enable_non_client_dpi_scaling, hwnd_dpi},
         drop_handler::FileDropHandler,
         event_loop::{self, EventLoopWindowTarget, DESTROY_MSG_ID},
-        icon::{self, IconType, WinCursor},
+        icon::{self, IconType},
         ime::ImeContext,
         keyboard::KeyEventBuilder,
         monitor::{self, MonitorHandle},
         util,
         window_state::{CursorFlags, SavedWindow, WindowFlags, WindowState},
-        Fullscreen, PlatformCustomCursor, PlatformSpecificWindowBuilderAttributes, SelectedCursor,
-        WindowId,
+        Fullscreen, PlatformSpecificWindowBuilderAttributes, WindowId,
     },
     window::{
         CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme, UserAttentionType,
@@ -81,23 +80,6 @@ use crate::{
     },
 };
 
-#[derive(Debug, Clone)]
-pub(crate) struct OwnedWindowHandle {
-    hwnd: HWND,
-}
-
-impl OwnedWindowHandle {
-    #[cfg(feature = "rwh_06")]
-    pub(crate) fn new_parent_window(handle: rwh_06::WindowHandle<'_>) -> Self {
-        // TODO: Do we need to do something to extend the lifetime of the window handle?
-        let hwnd = match handle.as_raw() {
-            rwh_06::RawWindowHandle::Win32(handle) => handle.hwnd.get() as HWND,
-            handle => panic!("invalid window handle {handle:?} on Windows"),
-        };
-        Self { hwnd }
-    }
-}
-
 /// The Win32 implementation of the main `Window` object.
 pub(crate) struct Window {
     /// Main handle for the window.
@@ -413,28 +395,13 @@ impl Window {
 
     #[inline]
     pub fn set_cursor_icon(&self, cursor: CursorIcon) {
-        self.window_state_lock().mouse.selected_cursor = SelectedCursor::Named(cursor);
+        self.window_state_lock().mouse.cursor = cursor;
         self.thread_executor.execute_in_thread(move || unsafe {
             let cursor = LoadCursorW(0, util::to_windows_cursor(cursor));
             SetCursor(cursor);
         });
     }
 
-    #[inline]
-    pub(crate) fn set_custom_cursor(&self, cursor: PlatformCustomCursor) {
-        let new_cursor = match WinCursor::new(&cursor.0) {
-            Ok(cursor) => cursor,
-            Err(err) => {
-                warn!("Failed to create custom cursor: {err}");
-                return;
-            }
-        };
-        self.window_state_lock().mouse.selected_cursor = SelectedCursor::Custom(new_cursor.clone());
-        self.thread_executor.execute_in_thread(move || unsafe {
-            SetCursor(new_cursor.as_raw_handle());
-        });
-    }
-
     #[inline]
     pub fn set_cursor_grab(&self, mode: CursorGrabMode) -> Result<(), ExternalError> {
         let confine = match mode {
@@ -1318,25 +1285,33 @@ where
     // so the diffing later can work.
     window_flags.set(WindowFlags::CLOSABLE, true);
 
-    let parent = if let Some(parent_window) = &attributes.parent_window {
-        window_flags.set(WindowFlags::CHILD, true);
-        if pl_attribs.menu.is_some() {
-            warn!("Setting a menu on a child window is unsupported");
+    let mut fallback_parent = || match pl_attribs.owner {
+        Some(parent) => {
+            window_flags.set(WindowFlags::POPUP, true);
+            Some(parent)
         }
-        Some(parent_window.hwnd)
-    } else {
-        match pl_attribs.owner {
-            Some(parent) => {
-                window_flags.set(WindowFlags::POPUP, true);
-                Some(parent)
-            }
-            None => {
-                window_flags.set(WindowFlags::ON_TASKBAR, true);
-                None
-            }
+        None => {
+            window_flags.set(WindowFlags::ON_TASKBAR, true);
+            None
         }
     };
 
+    #[cfg(feature = "rwh_06")]
+    let parent = match attributes.parent_window.0 {
+        Some(rwh_06::RawWindowHandle::Win32(handle)) => {
+            window_flags.set(WindowFlags::CHILD, true);
+            if pl_attribs.menu.is_some() {
+                warn!("Setting a menu on a child window is unsupported");
+            }
+            Some(handle.hwnd.get() as HWND)
+        }
+        Some(raw) => unreachable!("Invalid raw window handle {raw:?} on Windows"),
+        None => fallback_parent(),
+    };
+
+    #[cfg(not(feature = "rwh_06"))]
+    let parent = fallback_parent();
+
     let mut initdata = InitData {
         event_loop,
         attributes,

src/platform_impl/windows/window_state.rs

@@ -2,8 +2,8 @@ use crate::{
     dpi::{PhysicalPosition, PhysicalSize, Size},
     icon::Icon,
     keyboard::ModifiersState,
-    platform_impl::platform::{event_loop, util, Fullscreen, SelectedCursor},
-    window::{Theme, WindowAttributes},
+    platform_impl::platform::{event_loop, util, Fullscreen},
+    window::{CursorIcon, Theme, WindowAttributes},
 };
 use std::io;
 use std::sync::MutexGuard;
@@ -67,7 +67,7 @@ pub struct SavedWindow {
 
 #[derive(Clone)]
 pub struct MouseProperties {
-    pub(crate) selected_cursor: SelectedCursor,
+    pub cursor: CursorIcon,
     pub capture_count: u32,
     cursor_flags: CursorFlags,
     pub last_position: Option<PhysicalPosition<f64>>,
@@ -143,7 +143,7 @@ impl WindowState {
     ) -> WindowState {
         WindowState {
             mouse: MouseProperties {
-                selected_cursor: SelectedCursor::default(),
+                cursor: CursorIcon::default(),
                 capture_count: 0,
                 cursor_flags: CursorFlags::empty(),
                 last_position: None,

src/window.rs

@@ -9,7 +9,6 @@ use crate::{
     platform_impl, SendSyncWrapper,
 };
 
-pub use crate::cursor::{BadImage, CustomCursor, CustomCursorBuilder, MAX_CURSOR_SIZE};
 pub use crate::icon::{BadIcon, Icon};
 
 #[doc(inline)]
@@ -153,7 +152,8 @@ pub struct WindowAttributes {
     pub content_protected: bool,
     pub window_level: WindowLevel,
     pub active: bool,
-    pub(crate) parent_window: Option<platform_impl::OwnedWindowHandle>,
+    #[cfg(feature = "rwh_06")]
+    pub(crate) parent_window: SendSyncWrapper<Option<rwh_06::RawWindowHandle>>,
     pub(crate) fullscreen: SendSyncWrapper<Option<Fullscreen>>,
 }
 
@@ -179,7 +179,8 @@ impl Default for WindowAttributes {
             preferred_theme: None,
             resize_increments: None,
             content_protected: false,
-            parent_window: None,
+            #[cfg(feature = "rwh_06")]
+            parent_window: SendSyncWrapper(None),
             active: true,
         }
     }
@@ -188,8 +189,8 @@ impl Default for WindowAttributes {
 impl WindowAttributes {
     /// Get the parent window stored on the attributes.
     #[cfg(feature = "rwh_06")]
-    pub fn parent_window(&self) -> Option<Result<rwh_06::RawWindowHandle, rwh_06::HandleError>> {
-        Some(self.parent_window.as_ref()?.raw_window_handle())
+    pub fn parent_window(&self) -> Option<&rwh_06::RawWindowHandle> {
+        self.parent_window.0.as_ref()
     }
 
     /// Get `Fullscreen` option stored on the attributes.
@@ -474,6 +475,10 @@ impl WindowBuilder {
     ///
     /// The default is `None`.
     ///
+    /// ## Safety
+    ///
+    /// `parent_window` must be a valid window handle.
+    ///
     /// ## Platform-specific
     ///
     /// - **Windows** : A child window has the WS_CHILD style and is confined
@@ -483,9 +488,11 @@ impl WindowBuilder {
     /// - **Android / iOS / Wayland / Web:** Unsupported.
     #[cfg(feature = "rwh_06")]
     #[inline]
-    pub fn with_parent_window(mut self, parent_window: Option<rwh_06::WindowHandle<'_>>) -> Self {
-        self.window.parent_window =
-            parent_window.map(platform_impl::OwnedWindowHandle::new_parent_window);
+    pub unsafe fn with_parent_window(
+        mut self,
+        parent_window: Option<rwh_06::RawWindowHandle>,
+    ) -> Self {
+        self.window.parent_window = SendSyncWrapper(parent_window);
         self
     }
 
@@ -1070,7 +1077,8 @@ impl Window {
     /// - **Wayland:** Does not support exclusive fullscreen mode and will no-op a request.
     /// - **Windows:** Screen saver is disabled in fullscreen mode.
     /// - **Android / Orbital:** Unsupported.
-    /// - **Web:** Does nothing without a [transient activation].
+    /// - **Web:** Does nothing without a [transient activation], but queues the request
+    ///   for the next activation.
     ///
     /// [transient activation]: https://developer.mozilla.org/en-US/docs/Glossary/Transient_activation
     #[inline]
@@ -1328,7 +1336,6 @@ impl Window {
 /// Cursor functions.
 impl Window {
     /// Modifies the cursor icon of the window.
-    /// Overwrites cursors set in [`Window::set_custom_cursor`].
     ///
     /// ## Platform-specific
     ///
@@ -1339,19 +1346,6 @@ impl Window {
             .maybe_queue_on_main(move |w| w.set_cursor_icon(cursor))
     }
 
-    /// Modifies the cursor icon of the window with a custom cursor.
-    /// Overwrites cursors set in [`Window::set_cursor_icon`].
-    ///
-    /// ## Platform-specific
-    ///
-    /// - **iOS / Android / Orbital:** Unsupported.
-    #[inline]
-    pub fn set_custom_cursor(&self, cursor: &CustomCursor) {
-        let cursor = cursor.inner.clone();
-        self.window
-            .maybe_queue_on_main(move |w| w.set_custom_cursor(cursor))
-    }
-
     /// Changes the position of the cursor in window coordinates.
     ///
     /// ```no_run
@@ -1522,10 +1516,12 @@ impl Window {
 #[cfg(feature = "rwh_06")]
 impl rwh_06::HasWindowHandle for Window {
     fn window_handle(&self) -> Result<rwh_06::WindowHandle<'_>, rwh_06::HandleError> {
-        let raw = self.window.raw_window_handle_rwh_06()?;
+        let raw = self
+            .window
+            .maybe_wait_on_main(|w| w.raw_window_handle_rwh_06().map(SendSyncWrapper))?
+            .0;
 
-        // SAFETY: The window handle will never be deallocated while the window is alive,
-        // and the main thread safety requirements are upheld internally by each platform.
+        // SAFETY: The window handle will never be deallocated while the window is alive.
         Ok(unsafe { rwh_06::WindowHandle::borrow_raw(raw) })
     }
 }

tests/send_objects.rs

@@ -28,9 +28,3 @@ fn ids_send() {
     needs_send::<winit::event::DeviceId>();
     needs_send::<winit::monitor::MonitorHandle>();
 }
-
-#[test]
-fn custom_cursor_send() {
-    needs_send::<winit::window::CustomCursorBuilder>();
-    needs_send::<winit::window::CustomCursor>();
-}

tests/sync_object.rs

@@ -11,9 +11,3 @@ fn window_sync() {
 fn window_builder_sync() {
     needs_sync::<winit::window::WindowBuilder>();
 }
-
-#[test]
-fn custom_cursor_sync() {
-    needs_sync::<winit::window::CustomCursorBuilder>();
-    needs_sync::<winit::window::CustomCursor>();
-}