TMP

super long message  awdjbhkwbegfkhjewvbfhre vgfhj ejbsfhjkr besfhjkr besjkf breshjk gberj fn

.github/workflows/check-commit-msg.yml

@@ -0,0 +1,24 @@
+name: Check Commit Messages
+
+on:
+  pull_request:
+
+
+jobs:
+  length:
+    name: Check that length of commit messages are <72 characters
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Fetch branch data from origin
+        run: git fetch origin
+      - run: |
+          COMMIT_MESSAGES=$(git log --combined --format=%s origin/$GITHUB_BASE_REF..HEAD)
+          echo $COMMIT_MESSAGES
+          for MESSAGE in $COMMIT_MESSAGES; do
+            LENGTH=$(echo $MESSAGE | wc -c)
+            if [ $LENGTH -gt 72 ]; then
+              echo "Commit message \"$MESSAGE\" is too long ($LENGTH characters). Please keep commit messages under 72 characters."
+              exit 1
+            fi
+          done

.github/workflows/ci.yml

@@ -17,6 +17,24 @@ jobs:
     - name: Check Formatting
       run: cargo fmt -- --check
 
+  typos:
+    name: Check for typos
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+      - uses: taiki-e/install-action@v2
+        with:
+          tool: typos-cli
+      - name: run typos
+        run: typos
+      - name: Typos info
+        if: failure()
+        run: |
+          echo 'To fix typos, please run `typos -w`'
+          echo 'To check for a diff, run `typos`'
+          echo 'You can find typos here: https://crates.io/crates/typos'
+
   tests:
     name: Test ${{ matrix.toolchain }} ${{ matrix.platform.name }}
     runs-on: ${{ matrix.platform.os }}
@@ -35,7 +53,7 @@ jobs:
           - { name: 'Linux 64bit',        target: x86_64-unknown-linux-gnu, os: ubuntu-latest,   }
           - { name: 'X11',                target: x86_64-unknown-linux-gnu, os: ubuntu-latest, options: '--no-default-features --features=x11' }
           - { name: 'Wayland',            target: x86_64-unknown-linux-gnu, os: ubuntu-latest, options: '--no-default-features --features=wayland,wayland-dlopen' }
-          - { name: 'Android',            target: aarch64-linux-android,    os: ubuntu-latest, options: '--features=android-native-activity', cmd: 'apk --' }
+          - { name: 'Android',            target: aarch64-linux-android,    os: ubuntu-latest, options: '--package=winit --features=android-native-activity', cmd: 'apk --' }
           - { name: 'Redox OS',           target: x86_64-unknown-redox,     os: ubuntu-latest,   }
           - { name: 'macOS',              target: x86_64-apple-darwin,      os: macos-latest,    }
           - { name: 'iOS x86_64',         target: x86_64-apple-ios,         os: macos-latest,    }
@@ -89,7 +107,7 @@ jobs:
 
     - name: Generate lockfile
       # Also updates the crates.io index
-      run: cargo generate-lockfile
+      run: cargo generate-lockfile && cargo update -p ahash --precise 0.8.7 && cargo update -p bumpalo --precise 3.14.0
 
     - name: Install GCC Multilib
       if: (matrix.platform.os == 'ubuntu-latest') && contains(matrix.platform.target, 'i686')
@@ -125,13 +143,20 @@ jobs:
         RUSTDOCFLAGS: '--deny=warnings ${{ matrix.platform.rustflags }}'
 
     - name: Build crate
-      run: cargo $CMD build -p winit $OPTIONS
+      run: cargo $CMD build $OPTIONS
+
+    # Test only on Linux x86_64, so we avoid spending unnecessary CI hours.
+    - name: Test dpi crate
+      if: >
+        contains(matrix.platform.name, 'Linux 64bit') &&
+        matrix.toolchain != '1.70.0'
+      run: cargo test -p dpi
 
     - name: Build tests
       if: >
         !contains(matrix.platform.target, 'redox') &&
         matrix.toolchain != '1.70.0'
-      run: cargo $CMD test -p winit --no-run $OPTIONS
+      run: cargo $CMD test --no-run $OPTIONS
 
     - name: Run tests
       if: >
@@ -150,7 +175,7 @@ jobs:
       if: >
         !contains(matrix.platform.target, 'redox') &&
         matrix.toolchain != '1.70.0'
-      run: cargo $CMD test --no-run $OPTIONS -p winit --features serde
+      run: cargo $CMD test --no-run $OPTIONS --features serde
 
     - name: Run tests with serde enabled
       if: >

CHANGELOG.md

@@ -11,15 +11,24 @@ Unreleased` header.
 
 # Unreleased
 
-- On X11, fix swapped instance and general class names.
+- Deprecate `EventLoop::run` in favor of `EventLoop::run_app`.
+- Deprecate `EventLoopExtRunOnDemand::run_on_demand` in favor of `EventLoop::run_app_on_demand`.
+- Deprecate `EventLoopExtPumpEvents::pump_events` in favor of `EventLoopExtPumpEvents::pump_app_events`.
+- Add `ApplicationHandler<T>` trait which mimics `Event<T>`.
+- Move `dpi` types to its own crate, and re-export it from the root crate.
+- Implement `Sync` for `EventLoopProxy<T: Send>`.
+- **Breaking:** Move `Window::new` to `ActiveEventLoop::create_window` and `EventLoop::create_window` (with the latter being deprecated).
+- **Breaking:** Rename `EventLoopWindowTarget` to `ActiveEventLoop`.
+- **Breaking:** Remove `Deref` implementation for `EventLoop` that gave `EventLoopWindowTarget`.
+- **Breaking**: Remove `WindowBuilder` in favor of `WindowAttributes`.
 - **Breaking:** Removed unnecessary generic parameter `T` from `EventLoopWindowTarget`.
 - On Windows, macOS, X11, Wayland and Web, implement setting images as cursors. See the `custom_cursors.rs` example.
   - **Breaking:** Remove `Window::set_cursor_icon`
   - Add `WindowBuilder::with_cursor` and `Window::set_cursor` which takes a `CursorIcon` or `CustomCursor`
-  - 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.
   - Add `CustomCursorExtWebSys::from_animation` to allow creating animated cursors from other `CustomCursor`s.
+  - Add `{Active,}EventLoop::create_custom_cursor` to load custom cursor image sources.
 - 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.
@@ -36,27 +45,67 @@ Unreleased` header.
 - on iOS, add detection support for `PinchGesture`, `DoubleTapGesture` and `RotationGesture`.
 - on Windows: add `with_system_backdrop`, `with_border_color`, `with_title_background_color`, `with_title_text_color` and `with_corner_preference`
 - On Windows, Remove `WS_CAPTION`, `WS_BORDER` and `WS_EX_WINDOWEDGE` styles for child windows without decorations.
-- On Windows, fixed a race condition when sending an event through the loop proxy.
 - **Breaking:** Removed `EventLoopError::AlreadyRunning`, which can't happen as it is already prevented by the type system.
-- On Wayland, disable `Occluded` event handling.
 - Added `EventLoop::builder`, which is intended to replace the (now deprecated) `EventLoopBuilder::new`.
 - **Breaking:** Changed the signature of `EventLoop::with_user_event` to return a builder.
 - **Breaking:** Removed `EventLoopBuilder::with_user_event`, the functionality is now available in `EventLoop::with_user_event`.
-- Add `Window::builder`, which is intended to replace the (now deprecated) `WindowBuilder::new`.
+- Add `Window::default_attributes` to get default `WindowAttributes`.
+- `log` has been replaced with `tracing`. The old behavior can be emulated by setting the `log` feature on the `tracing` crate.
+
+# 0.29.15
+
+- On X11, fix crash due to xsettings query on systems with incomplete xsettings.
+
+# 0.29.14
+
+- On X11/Wayland, fix `text` and `text_with_all_modifiers` not being `None` during compose.
+- On Wayland, don't reapply cursor grab when unchanged.
+- On X11, fix a bug where some mouse events would be unexpectedly filtered out.
+
+# 0.29.13
+
+- On Web, fix possible crash with `ControlFlow::Wait` and `ControlFlow::WaitUntil`.
+
+# 0.29.12
+
+- On X11, fix use after free during xinput2 handling.
+- On X11, filter close to zero values in mouse device events
+
+# 0.29.11
+
+- Fix compatibility with 32-bit platforms without 64-bit atomics.
+- On macOS, fix incorrect IME cursor rect origin.
+- On Windows, fixed a race condition when sending an event through the loop proxy.
+- On X11, fix swapped instance and general class names.
+- On X11, don't require XIM to run.
+- On X11, fix xkb state not being updated correctly sometimes leading to wrong input.
 - On X11, reload dpi on `_XSETTINGS_SETTINGS` update.
 - On X11, fix deadlock when adjusting DPI and resizing at the same time.
+- On Wayland, disable `Occluded` event handling.
+- On Wayland, fix DeviceEvent::Motion not being sent
 - On Wayland, fix `Focused(false)` being send when other seats still have window focused.
 - On Wayland, fix `Window::set_{min,max}_inner_size` not always applied.
+- On Wayland, fix title in CSD not updated from `AboutToWait`.
 - On Windows, fix inconsistent resizing behavior with multi-monitor setups when repositioning outside the event loop.
 - On Wayland, fix `WAYLAND_SOCKET` not used when detecting platform.
-- **Breaking:** Move some types to the `winit-core` crate. Most types are
-  re-exported verbatim; however:
-  - `Event`, `WindowEvent` and `KeyEvent` now take a generic that `winit`
-    implements.
-  - `ActivationToken` and `InnerSizeWriter` expose new methods to make them
-    useful.
-  - `InnerSizeWriter::request_inner_size` returns an `InnerSizeIgnored` error
-    instead of an `ExternalError`.
+- On Orbital, fix `logical_key` and `text` not reported in `KeyEvent`.
+- On Orbital, implement `KeyEventExtModifierSupplement`.
+- On Orbital, map keys to `NamedKey` when possible.
+- On Orbital, implement `set_cursor_grab`.
+- On Orbital, implement `set_cursor_visible`.
+- On Orbital, implement `drag_window`.
+- On Orbital, implement `drag_resize_window`.
+- On Orbital, implement `set_transparent`.
+- On Orbital, implement `set_visible`.
+- On Orbital, implement `is_visible`.
+- On Orbital, implement `set_resizable`.
+- On Orbital, implement `is_resizable`.
+- On Orbital, implement `set_maximized`.
+- On Orbital, implement `is_maximized`.
+- On Orbital, implement `set_decorations`.
+- On Orbital, implement `is_decorated`.
+- On Orbital, implement `set_window_level`.
+- On Orbital, emit `DeviceEvent::MouseMotion`.
 
 # 0.29.10
 
@@ -118,7 +167,7 @@ Unreleased` header.
 # 0.29.3
 
 - On Wayland, apply correct scale to `PhysicalSize` passed in `WindowBuilder::with_inner_size` when possible.
-- On Wayland, fix `RedrawRequsted` being always sent without decorations and `sctk-adwaita` feature.
+- On Wayland, fix `RedrawRequested` being always sent without decorations and `sctk-adwaita` feature.
 - On Wayland, ignore resize requests when the window is fully tiled.
 - On Wayland, use `configure_bounds` to constrain `with_inner_size` when compositor wants users to pick size.
 - On Windows, fix deadlock when accessing the state during `Cursor{Enter,Leave}`.
@@ -370,7 +419,7 @@ Unreleased` header.
 - **Breaking:**: Removed deprecated method `platform::unix::WindowExtUnix::is_ready`.
 - Removed `parking_lot` dependency.
 - **Breaking:** On macOS, add support for two-finger touchpad magnification and rotation gestures with new events `WindowEvent::TouchpadMagnify` and `WindowEvent::TouchpadRotate`. Also add support for touchpad smart-magnification gesture with a new event `WindowEvent::SmartMagnify`.
-- **Breaking:** On web, the `WindowBuilderExtWebSys::with_prevent_default` setting (enabled by default), now additionally prevents scrolling of the webpage in mobile browsers, previously it only disabled scrolling on desktop.
+- **Breaking:** On Web, the `WindowBuilderExtWebSys::with_prevent_default` setting (enabled by default), now additionally prevents scrolling of the webpage in mobile browsers, previously it only disabled scrolling on desktop.
 - On Wayland, `wayland-csd-adwaita` now uses `ab_glyph` instead of `crossfont` to render the title for decorations.
 - On Wayland, a new `wayland-csd-adwaita-crossfont` feature was added to use `crossfont` instead of `ab_glyph` for decorations.
 - On Wayland, if not otherwise specified use upstream automatic CSD theme selection.
@@ -390,7 +439,7 @@ Unreleased` header.
 - Added `Window::set_transparent` to provide a hint about transparency of the window on Wayland and macOS.
 - On macOS, fix the mouse buttons other than left/right/middle being reported as middle.
 - On Wayland, support fractional scaling via the wp-fractional-scale protocol.
-- On web, fix removal of mouse event listeners from the global object upon window distruction.
+- On Web, fix removal of mouse event listeners from the global object upon window destruction.
 - Add WindowAttributes getter to WindowBuilder to allow introspection of default values.
 - Added `Window::set_ime_purpose` for setting the IME purpose, currently implemented on Wayland only.
 
@@ -496,7 +545,7 @@ Unreleased` header.
 - On Web, add `with_prevent_default` and `with_focusable` to `WindowBuilderExtWebSys` to control whether events should be propagated.
 - On Windows, fix focus events being sent to inactive windows.
 - **Breaking**, update `raw-window-handle` to `v0.5` and implement `HasRawDisplayHandle` for `Window` and `EventLoopWindowTarget`.
-- On X11, add function `register_xlib_error_hook` into `winit::platform::unix` to subscribe for errors comming from Xlib.
+- On X11, add function `register_xlib_error_hook` into `winit::platform::unix` to subscribe for errors coming from Xlib.
 - On Android, upgrade `ndk` and `ndk-glue` dependencies to the recently released `0.7.0`.
 - All platforms can now be relied on to emit a `Resumed` event. Applications are recommended to lazily initialize graphics state and windows on first resume for portability.
 - **Breaking:**: Reverse horizontal scrolling sign in `MouseScrollDelta` to match the direction of vertical scrolling. A positive X value now means moving the content to the right. The meaning of vertical scrolling stays the same: a positive Y value means moving the content down.
@@ -795,7 +844,7 @@ Unreleased` header.
 - On Windows, fix handling of surrogate pairs when dispatching `ReceivedCharacter`.
 - On macOS 10.15, fix freeze upon exiting exclusive fullscreen mode.
 - On iOS, fix panic upon closing the app.
-- On X11, allow setting mulitple `XWindowType`s.
+- On X11, allow setting multiple `XWindowType`s.
 - On iOS, fix null window on initial `HiDpiFactorChanged` event.
 - On Windows, fix fullscreen window shrinking upon getting restored to a normal window.
 - On macOS, fix events not being emitted during modal loops, such as when windows are being resized
@@ -948,7 +997,7 @@ and `WindowEvent::HoveredFile`.
 - On Windows, hiding the cursor no longer hides the cursor for all Winit windows - just the one `hide_cursor` was called on.
 - On Windows, cursor grabs used to get perpetually canceled when the grabbing window lost focus. Now, cursor grabs automatically get re-initialized when the window regains focus and the mouse moves over the client area.
 - On Windows, only vertical mouse wheel events were handled. Now, horizontal mouse wheel events are also handled.
-- On Windows, ignore the AltGr key when populating the `ModifersState` type.
+- On Windows, ignore the AltGr key when populating the `ModifiersState` type.
 
 # Version 0.18.1 (2018-12-30)
 
@@ -1228,7 +1277,7 @@ _Yanked_
 
 # Version 0.8.2 (2017-09-28)
 
-- Uniformize keyboard scancode values accross Wayland and X11 (#297).
+- Uniformize keyboard scancode values across Wayland and X11 (#297).
 - Internal rework of the wayland event loop
 - Added method `os::linux::WindowExt::is_ready`
 
@@ -1242,7 +1291,7 @@ _Yanked_
 - Added `Window::set_maximized`, `WindowAttributes::maximized` and `WindowBuilder::with_maximized`.
 - Added `Window::set_fullscreen`.
 - Changed `with_fullscreen` to take a `Option<MonitorId>` instead of a `MonitorId`.
-- Removed `MonitorId::get_native_identifer()` in favor of platform-specific traits in the `os`
+- Removed `MonitorId::get_native_identifier()` in favor of platform-specific traits in the `os`
   module.
 - Changed `get_available_monitors()` and `get_primary_monitor()` to be methods of `EventsLoop`
   instead of stand-alone methods.

CODE_OF_CONDUCT.md

@@ -0,0 +1,6 @@
+# Code of Conduct
+
+The `rust-windowing` project adheres to the [Rust Code of Conduct]. This
+describes the minimum behavior expected from all contributors.
+
+[Rust Code of Conduct]: https://www.rust-lang.org/policies/code-of-conduct

CONTRIBUTING.md

@@ -42,11 +42,9 @@ Once your PR is deemed ready, the merging maintainer will take care of resolving
 `CHANGELOG.md` (but you must resolve other conflicts yourself). Doing this requires that you check the
 "give contributors write access to the branch" checkbox when creating the PR.
 
-## Maintainers & Testers
+## Maintainers
 
-The current maintainers are listed in the [CODEOWNERS](.github/CODEOWNERS) file.
-
-If you are interested in being pinged when testing is needed for a specific platform, please add yourself to the [Testers and Contributors](https://github.com/rust-windowing/winit/wiki/Testers-and-Contributors) table!
+The current maintainers for each platform are listed in the [CODEOWNERS](.github/CODEOWNERS) file.
 
 ## Release process
 

Cargo.toml

@@ -1,16 +1,278 @@
-[workspace]
-members = [
-    "run-wasm",
-    "winit",
-    "winit-core"
+[package]
+name = "winit"
+version = "0.29.15"
+authors = ["The winit contributors", "Pierre Krieger <pierre.krieger1708@gmail.com>"]
+description = "Cross-platform window creation library."
+keywords = ["windowing"]
+readme = "README.md"
+documentation = "https://docs.rs/winit"
+categories = ["gui"]
+rust-version.workspace = true
+repository.workspace = true
+license.workspace = true
+edition.workspace = true
+
+[package.metadata.docs.rs]
+features = [
+    "rwh_04",
+    "rwh_05",
+    "rwh_06",
+    "serde",
+    "mint",
+    # Enabled to get docs to compile
+    "android-native-activity",
 ]
+# These are all tested in CI
+targets = [
+    # Windows
+    "i686-pc-windows-msvc",
+    "x86_64-pc-windows-msvc",
+    # macOS
+    "x86_64-apple-darwin",
+    # Unix (X11 & Wayland)
+    "i686-unknown-linux-gnu",
+    "x86_64-unknown-linux-gnu",
+    # iOS
+    "x86_64-apple-ios",
+    # Android
+    "aarch64-linux-android",
+    # Web
+    "wasm32-unknown-unknown",
+]
+rustdoc-args = ["--cfg", "docsrs"]
+
+# Features are documented in either `lib.rs` or under `winit::platform`.
+[features]
+default = ["rwh_06", "x11", "wayland", "wayland-dlopen", "wayland-csd-adwaita"]
+x11 = ["x11-dl", "bytemuck", "percent-encoding", "xkbcommon-dl/x11", "x11rb"]
+wayland = ["wayland-client", "wayland-backend", "wayland-protocols", "wayland-protocols-plasma", "sctk", "ahash", "memmap2"]
+wayland-dlopen = ["wayland-backend/dlopen"]
+wayland-csd-adwaita = ["sctk-adwaita", "sctk-adwaita/ab_glyph"]
+wayland-csd-adwaita-crossfont = ["sctk-adwaita", "sctk-adwaita/crossfont"]
+wayland-csd-adwaita-notitle = ["sctk-adwaita"]
+android-native-activity = ["android-activity/native-activity"]
+android-game-activity = ["android-activity/game-activity"]
+serde = ["dep:serde", "cursor-icon/serde", "smol_str/serde", "dpi/serde"]
+mint = ["dpi/mint"]
+rwh_04 = ["dep:rwh_04", "ndk/rwh_04"]
+rwh_05 = ["dep:rwh_05", "ndk/rwh_05"]
+rwh_06 = ["dep:rwh_06", "ndk/rwh_06"]
+
+[build-dependencies]
+cfg_aliases = "0.2.0"
+
+[dependencies]
+bitflags = "2"
+cursor-icon = "1.1.0"
+rwh_04 = { package = "raw-window-handle", version = "0.4", 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 = { workspace = true, optional = true }
+smol_str = "0.2.0"
+dpi = { path = "dpi" }
+tracing = { version = "0.1.40", default_features = false }
+
+[dev-dependencies]
+image = { version = "0.24.0", default-features = false, features = ["png"] }
+tracing = { version = "0.1.40", default_features = false, features = ["log"] }
+tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
+winit = { path = ".", features = ["rwh_05"] }
+
+[target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dev-dependencies]
+softbuffer = { version = "0.3.0", default-features = false, features = ["x11", "x11-dlopen", "wayland", "wayland-dlopen"] }
+
+[target.'cfg(target_os = "android")'.dependencies]
+android-activity = "0.5.0"
+ndk = { version = "0.8.0", default-features = false }
+ndk-sys = "0.5.0"
+
+[target.'cfg(any(target_os = "ios", target_os = "macos"))'.dependencies]
+core-foundation = "0.9.3"
+objc2 = "0.5.0"
+
+[target.'cfg(target_os = "macos")'.dependencies]
+core-graphics = "0.23.1"
+
+[target.'cfg(target_os = "macos")'.dependencies.icrate]
+version = "0.1.0"
+features = [
+    "dispatch",
+    "Foundation",
+    "Foundation_NSArray",
+    "Foundation_NSAttributedString",
+    "Foundation_NSMutableAttributedString",
+    "Foundation_NSData",
+    "Foundation_NSDictionary",
+    "Foundation_NSString",
+    "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"
+features = [
+    "dispatch",
+    "Foundation",
+    "Foundation_NSArray",
+    "Foundation_NSString",
+    "Foundation_NSProcessInfo",
+    "Foundation_NSThread",
+    "Foundation_NSSet",
+]
+
+[target.'cfg(target_os = "windows")'.dependencies]
+unicode-segmentation = "1.7.1"
+
+[target.'cfg(target_os = "windows")'.dependencies.windows-sys]
+version = "0.48"
+features = [
+    "Win32_Devices_HumanInterfaceDevice",
+    "Win32_Foundation",
+    "Win32_Globalization",
+    "Win32_Graphics_Dwm",
+    "Win32_Graphics_Gdi",
+    "Win32_Media",
+    "Win32_System_Com_StructuredStorage",
+    "Win32_System_Com",
+    "Win32_System_LibraryLoader",
+    "Win32_System_Ole",
+    "Win32_System_SystemInformation",
+    "Win32_System_SystemServices",
+    "Win32_System_Threading",
+    "Win32_System_WindowsProgramming",
+    "Win32_UI_Accessibility",
+    "Win32_UI_Controls",
+    "Win32_UI_HiDpi",
+    "Win32_UI_Input_Ime",
+    "Win32_UI_Input_KeyboardAndMouse",
+    "Win32_UI_Input_Pointer",
+    "Win32_UI_Input_Touch",
+    "Win32_UI_Shell",
+    "Win32_UI_TextServices",
+    "Win32_UI_WindowsAndMessaging",
+]
+
+[target.'cfg(all(unix, not(any(target_os = "redox", target_family = "wasm", target_os = "android", target_os = "ios", target_os = "macos"))))'.dependencies]
+ahash = { version = "0.8.7", features = ["no-rng"], optional = true }
+bytemuck = { version = "1.13.1", default-features = false, optional = true }
+calloop = "0.12.3"
+libc = "0.2.64"
+memmap2 = { version = "0.9.0", optional = true }
+percent-encoding = { version = "2.0", optional = true }
+rustix = { version = "0.38.4", default-features = false, features = ["std", "system", "thread", "process"] }
+sctk = { package = "smithay-client-toolkit", version = "0.18.0", default-features = false, features = ["calloop"], optional = true }
+sctk-adwaita = { version = "0.8.0", default_features = false, optional = true }
+wayland-backend = { version = "0.3.0", default_features = false, features = ["client_system"], optional = true }
+wayland-client = { version = "0.31.1", optional = true }
+wayland-protocols = { version = "0.31.0", features = [ "staging"], optional = true }
+wayland-protocols-plasma = { version = "0.2.0", features = [ "client" ], optional = true }
+x11-dl = { version = "2.19.1", optional = true }
+x11rb = { version = "0.13.0", default-features = false, features = ["allow-unsafe-code", "dl-libxcb", "randr", "resource_manager", "xinput", "xkb"], optional = true }
+xkbcommon-dl = "0.4.2"
+
+[target.'cfg(target_os = "redox")'.dependencies]
+orbclient = { version = "0.3.47", default-features = false }
+redox_syscall = "0.4.1"
+
+[target.'cfg(target_family = "wasm")'.dependencies.web_sys]
+package = "web-sys"
+version = "0.3.64"
+features = [
+    'AbortController',
+    'AbortSignal',
+    'Blob',
+    'console',
+    'CssStyleDeclaration',
+    'Document',
+    'DomException',
+    'DomRect',
+    'DomRectReadOnly',
+    'Element',
+    'Event',
+    'EventTarget',
+    'FocusEvent',
+    'HtmlCanvasElement',
+    'HtmlElement',
+    'HtmlImageElement',
+    'ImageBitmap',
+    'ImageBitmapOptions',
+    'ImageBitmapRenderingContext',
+    'ImageData',
+    'IntersectionObserver',
+    'IntersectionObserverEntry',
+    'KeyboardEvent',
+    'MediaQueryList',
+    'MessageChannel',
+    'MessagePort',
+    'Node',
+    'PageTransitionEvent',
+    'PointerEvent',
+    'PremultiplyAlpha',
+    'ResizeObserver',
+    'ResizeObserverBoxOptions',
+    'ResizeObserverEntry',
+    'ResizeObserverOptions',
+    'ResizeObserverSize',
+    'VisibilityState',
+    'Window',
+    'WheelEvent',
+    'Url',
+]
+
+[target.'cfg(target_family = "wasm")'.dependencies]
+js-sys = "0.3.64"
+pin-project = "1"
+wasm-bindgen = "0.2"
+wasm-bindgen-futures = "0.4"
+web-time = "1"
+
+[target.'cfg(all(target_family = "wasm", target_feature = "atomics"))'.dependencies]
+atomic-waker = "1"
+concurrent-queue = { version = "2", default-features = false }
+
+[target.'cfg(target_family = "wasm")'.dev-dependencies]
+console_log = "1"
+web-sys = { version = "0.3.22", features = ['CanvasRenderingContext2d'] }
+
+[[example]]
+doc-scrape-examples = true
+name = "window"
+
+[workspace]
 resolver = "2"
+members = [
+    "dpi",
+    "run-wasm",
+]
+
+[workspace.package]
+rust-version = "1.70.0"
+repository = "https://github.com/rust-windowing/winit"
+license = "Apache-2.0"
+edition = "2021"
 
 [workspace.dependencies]
-bitflags = "2"
-cfg_aliases = "0.2.0"
-cursor-icon = "1.1.0"
 serde = { version = "1", features = ["serde_derive"] }
-smol_str = "0.2.0"
-web-time = "1"
-winit-core = { path = "./winit-core", default-features = false, features = ["std"] }
+mint = "0.5.6"

FEATURES.md

@@ -3,8 +3,8 @@
 Winit aims to expose an interface that abstracts over window creation and input handling and can
 be used to create both games and applications. It supports the following main graphical platforms:
 - Desktop
-  - Windows 7+ (10+ is tested regularly)
-  - macOS 10.7+ (10.14+ is tested regularly)
+  - Windows
+  - macOS
   - Unix
     - via X11
     - via Wayland
@@ -13,9 +13,6 @@ be used to create both games and applications. It supports the following main gr
   - iOS
   - Android
 - Web
-  - Chrome
-  - Firefox
-  - Safari 13.1+
 
 Most platforms expose capabilities that cannot be meaningfully transposed onto others. Winit does not
 aim to support every single feature of every platform, but rather to abstract over the common features
@@ -151,7 +148,6 @@ If your PR makes notable changes to Winit's features, please update this section
 * Setting the X11 parent window
 
 ### iOS
-* `winit` has a minimum OS requirement of iOS 8
 * Get the `UIScreen` object pointer
 * Setting the `UIView` hidpi factor
 * Valid orientations
@@ -164,9 +160,6 @@ If your PR makes notable changes to Winit's features, please update this section
 ### Web
 * Get if the systems preferred color scheme is "dark"
 
-## Usability
-* `serde`: Enables serialization/deserialization of certain types with Serde. (Maintainer: @Osspial)
-
 ## Compatibility Matrix
 
 Legend:

README.md

@@ -8,7 +8,7 @@
 
 ```toml
 [dependencies]
-winit = "0.29.10"
+winit = "0.29.15"
 ```
 
 ## [Documentation](https://docs.rs/winit)
@@ -21,7 +21,7 @@ For features _outside_ the scope of winit, see [Are we GUI Yet?](https://arewegu
 
 Join us in our [![Matrix](https://img.shields.io/badge/Matrix-%23rust--windowing%3Amatrix.org-blueviolet.svg)](https://matrix.to/#/#rust-windowing:matrix.org) room. If you don't get an answer there, try [![Libera.Chat](https://img.shields.io/badge/libera.chat-%23winit-red.svg)](https://web.libera.chat/#winit).
 
-The maintainers have a meeting every friday at UTC 14. The meeting notes can be found [here](https://hackmd.io/@winit-meetings).
+The maintainers have a meeting every friday at UTC 15. The meeting notes can be found [here](https://hackmd.io/@winit-meetings).
 
 ## Usage
 
@@ -33,14 +33,6 @@ Winit is designed to be a low-level brick in a hierarchy of libraries. Consequen
 show something on the window you need to use the platform-specific getters provided by winit, or
 another library.
 
-### Cargo Features
-
-Winit provides the following features, which can be enabled in your `Cargo.toml` file:
-* `serde`: Enables serialization/deserialization of certain types with [Serde](https://crates.io/crates/serde).
-* `x11` (enabled by default): On Unix platform, compiles with the X11 backend
-* `wayland` (enabled by default): On Unix platform, compiles with the Wayland backend
-* `mint`: Enables mint (math interoperability standard types) conversions.
-
 ## MSRV Policy
 
 This crate's Minimum Supported Rust Version (MSRV) is **1.70**. Changes to
@@ -71,118 +63,4 @@ same MSRV policy.
 
 ### Platform-specific usage
 
-#### Wayland
-
-Note that windows don't appear on Wayland until you draw/present to them.
-
-#### Web
-
-To run the web example: `cargo run-wasm --example web`
-
-Winit supports compiling to the `wasm32-unknown-unknown` target with `web-sys`.
-
-On the web platform, a Winit window is backed by a `<canvas>` element. You can
-either [provide Winit with a `<canvas>` element][web with_canvas], or [let Winit
-create a `<canvas>` element which you can then retrieve][web canvas getter] and
-insert it into the DOM yourself.
-
-For the example code using Winit on Web, check out the [web example]. For
-information on using Rust on WebAssembly, check out the [Rust and WebAssembly
-book].
-
-[web with_canvas]: https://docs.rs/winit/latest/wasm32-unknown-unknown/winit/platform/web/trait.WindowBuilderExtWebSys.html#tymethod.with_canvas
-[web canvas getter]: https://docs.rs/winit/latest/wasm32-unknown-unknown/winit/platform/web/trait.WindowExtWebSys.html#tymethod.canvas
-[web example]: ./examples/web.rs
-[Rust and WebAssembly book]: https://rustwasm.github.io/book/
-
-#### Android
-
-The Android backend builds on (and exposes types from) the [`ndk`](https://docs.rs/ndk/latest/ndk/) crate.
-
-Native Android applications need some form of "glue" crate that is responsible
-for defining the main entry point for your Rust application as well as tracking
-various life-cycle events and synchronizing with the main JVM thread.
-
-Winit uses the [android-activity](https://github.com/rib/android-activity) as a
-glue crate (prior to `0.28` it used
-[ndk-glue](https://github.com/rust-windowing/android-ndk-rs/tree/master/ndk-glue)).
-
-The version of the glue crate that your application depends on _must_ match the
-version that Winit depends on because the glue crate is responsible for your
-application's main entry point. If Cargo resolves multiple versions, they will
-clash.
-
-`winit` glue compatibility table:
-
-| winit |       ndk-glue               |
-| :---: | :--------------------------: |
-| 0.29  | `android-activity = "0.5"`   |
-| 0.28  | `android-activity = "0.4"`   |
-| 0.27  | `ndk-glue = "0.7"`           |
-| 0.26  | `ndk-glue = "0.5"`           |
-| 0.25  | `ndk-glue = "0.3"`           |
-| 0.24  | `ndk-glue = "0.2"`           |
-
-The recommended way to avoid a conflict with the glue version is to avoid explicitly
-depending on the `android-activity` crate, and instead consume the API that
-is re-exported by Winit under `winit::platform::android::activity::*`
-
-Running on an Android device needs a dynamic system library. Add this to Cargo.toml:
-
-```toml
-[lib]
-name = "main"
-crate-type = ["cdylib"]
-```
-
-All Android applications are based on an `Activity` subclass, and the
-`android-activity` crate is designed to support different choices for this base
-class. Your application _must_ specify the base class it needs via a feature flag:
-
-| Base Class       | Feature Flag      |  Notes  |
-| :--------------: | :---------------: | :-----: |
-| `NativeActivity` | `android-native-activity` | Built-in to Android - it is possible to use without compiling any Java or Kotlin code. Java or Kotlin code may be needed to subclass `NativeActivity` to access some platform features. It does not derive from the [`AndroidAppCompat`] base class.|
-| [`GameActivity`] | `android-game-activity`   | Derives from [`AndroidAppCompat`], a defacto standard `Activity` base class that helps support a wider range of Android versions. Requires a build system that can compile Java or Kotlin and fetch Android dependencies from a [Maven repository][agdk_jetpack] (or link with an embedded [release][agdk_releases] of [`GameActivity`]) |
-
-[`GameActivity`]: https://developer.android.com/games/agdk/game-activity
-[`GameTextInput`]: https://developer.android.com/games/agdk/add-support-for-text-input
-[`AndroidAppCompat`]: https://developer.android.com/reference/androidx/appcompat/app/AppCompatActivity
-[agdk_jetpack]: https://developer.android.com/jetpack/androidx/releases/games
-[agdk_releases]: https://developer.android.com/games/agdk/download#agdk-libraries
-[Gradle]: https://developer.android.com/studio/build
-
-For more details, refer to these `android-activity` [example applications](https://github.com/rust-mobile/android-activity/tree/main/examples).
-
-##### Converting from `ndk-glue` to `android-activity`
-
-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 = "0.29.10", 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).
-
-#### MacOS
-
-A lot of functionality expects the application to be ready before you start
-doing anything; this includes creating windows, fetching monitors, drawing,
-and so on, see issues [#2238], [#2051] and [#2087].
-
-If you encounter problems, you should try doing your initialization inside
-`Event::Resumed`.
-
-#### iOS
-
-Similar to macOS, iOS's main `UIApplicationMain` does some init work that's required
-by all UI-related code (see issue [#1705]). It would be best to consider creating your windows
-inside `Event::Resumed`.
-
-
-[#2238]: https://github.com/rust-windowing/winit/issues/2238
-[#2051]: https://github.com/rust-windowing/winit/issues/2051
-[#2087]: https://github.com/rust-windowing/winit/issues/2087
-[#1705]: https://github.com/rust-windowing/winit/issues/1705
-
-#### Redox OS
-
-Redox OS has some functionality not yet present that will be implemented when
-its orbital display server provides it.
+Check out the [`winit::platform`](https://rust-windowing.github.io/winit/winit/platform/index.html) module for platform-specific usage.

deny.toml

@@ -35,9 +35,7 @@ skip = [
     { name = "bitflags" },             # the ecosystem is in the process of migrating.
     { name = "libloading" },           # x11rb uses a different version until the next update
 ]
-skip-tree = [
-    { name = "run-wasm", version = "0.1.0" }
-]
+skip-tree = []
 
 
 [licenses]

dpi/CHANGELOG.md

@@ -0,0 +1,16 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+Please keep one empty line before and after all headers. (This is required for
+`git` to produce a conflict when a release is made while a PR is open and the
+PR's changelog entry would go into the wrong section).
+
+And please only add new entries to the top of this list, right below the `#
+Unreleased` header.
+
+# Unreleased
+
+# 0.1.0
+
+- Add `LogicalUnit`, `PhysicalUnit` and `PixelUnit` types and related functions.

dpi/Cargo.toml

@@ -0,0 +1,39 @@
+[package]
+name = "dpi"
+version = "0.1.0"
+description = "Types for handling UI scaling"
+keywords = ["DPI", "HiDPI", "scale-factor"]
+categories = ["gui"]
+rust-version.workspace = true
+repository.workspace = true
+license.workspace = true
+edition.workspace = true
+
+[features]
+serde = ["dep:serde"]
+mint = ["dep:mint"]
+
+[dependencies]
+serde = { workspace = true, optional = true }
+mint = { workspace = true, optional = true }
+
+[package.metadata.docs.rs]
+features = ["serde", "mint"]
+# These are all tested in CI
+targets = [
+    # Windows
+    "i686-pc-windows-msvc",
+    "x86_64-pc-windows-msvc",
+    # macOS
+    "x86_64-apple-darwin",
+    # Unix (X11 & Wayland)
+    "i686-unknown-linux-gnu",
+    "x86_64-unknown-linux-gnu",
+    # iOS
+    "x86_64-apple-ios",
+    # Android
+    "aarch64-linux-android",
+    # Web
+    "wasm32-unknown-unknown",
+]
+rustdoc-args = ["--cfg", "docsrs"]

dpi/LICENSE

@@ -0,0 +1 @@
+../LICENSE

dpi/src/lib.rs

@@ -1,4 +1,4 @@
-//! UI scaling is important, so read the docs for this module if you don't want to be confused.
+//! # DPI
 //!
 //! ## Why should I care about UI scaling?
 //!
@@ -35,14 +35,11 @@
 //!
 //! ### Position and Size types
 //!
-//! Winit's [`PhysicalPosition`] / [`PhysicalSize`] types correspond with the actual pixels on the
-//! device, and the [`LogicalPosition`] / [`LogicalSize`] types correspond to the physical pixels
+//! The [`PhysicalPosition`] / [`PhysicalSize`] / [`PhysicalUnit`] types correspond with the actual pixels on the
+//! device, and the [`LogicalPosition`] / [`LogicalSize`] / [`LogicalUnit`] types correspond to the physical pixels
 //! divided by the scale factor.
-//! All of Winit's functions return physical types, but can take either logical or physical
-//! coordinates as input, allowing you to use the most convenient coordinate system for your
-//! particular application.
 //!
-//! Winit's position and size types are generic over their exact pixel type, `P`, to allow the
+//! The position and size types are generic over their exact pixel type, `P`, to allow the
 //! API to have integer precision where appropriate (e.g. most window manipulation functions) and
 //! floating precision when necessary (e.g. logical sizes for fractional scale factors and touch
 //! input). If `P` is a floating-point type, please do not cast the values with `as {int}`. Doing so
@@ -51,58 +48,24 @@
 //! rounding properly. Note that precision loss will still occur when rounding from a float to an
 //! int, although rounding lessens the problem.
 //!
-//! ### Events
+//! ## Cargo Features
 //!
-//! Winit will dispatch a [`ScaleFactorChanged`] event whenever a window's scale factor has changed.
-//! This can happen if the user drags their window from a standard-resolution monitor to a high-DPI
-//! monitor or if the user changes their DPI settings. This allows you to rescale your application's
-//! UI elements and adjust how the platform changes the window's size to reflect the new scale
-//! factor. If a window hasn't received a [`ScaleFactorChanged`] event, its scale factor
-//! can be found by calling [`window.scale_factor()`].
+//! This crate provides the following Cargo features:
 //!
-//! ## How is the scale factor calculated?
-//!
-//! The scale factor is calculated differently on different platforms:
-//!
-//! - **Windows:** On Windows 8 and 10, per-monitor scaling is readily configured by users from the
-//!   display settings. While users are free to select any option they want, they're only given a
-//!   selection of "nice" scale factors, i.e. 1.0, 1.25, 1.5... on Windows 7. The scale factor is
-//!   global and changing it requires logging out. See [this article][windows_1] for technical
-//!   details.
-//! - **macOS:** Recent macOS versions allow the user to change the scaling factor for specific
-//!   displays. When available, the user may pick a per-monitor scaling factor from a set of
-//!   pre-defined settings. All "retina displays" have a scaling factor above 1.0 by default,
-//!   but the specific value varies across devices.
-//! - **X11:** Many man-hours have been spent trying to figure out how to handle DPI in X11. Winit
-//!   currently uses a three-pronged approach:
-//!   + Use the value in the `WINIT_X11_SCALE_FACTOR` environment variable if present.
-//!   + If not present, use the value set in `Xft.dpi` in Xresources.
-//!   + Otherwise, calculate the scale factor based on the millimeter monitor dimensions provided by XRandR.
-//!
-//!   If `WINIT_X11_SCALE_FACTOR` is set to `randr`, it'll ignore the `Xft.dpi` field and use the
-//!   XRandR scaling method. Generally speaking, you should try to configure the standard system
-//!   variables to do what you want before resorting to `WINIT_X11_SCALE_FACTOR`.
-//! - **Wayland:** The scale factor is suggested by the compositor for each window individually. The
-//!   monitor scale factor may differ from the window scale factor.
-//! - **iOS:** Scale factors are set by Apple to the value that best suits the device, and range
-//!   from `1.0` to `3.0`. See [this article][apple_1] and [this article][apple_2] for more
-//!   information.
-//! - **Android:** Scale factors are set by the manufacturer to the value that best suits the
-//!   device, and range from `1.0` to `4.0`. See [this article][android_1] for more information.
-//! - **Web:** The scale factor is the ratio between CSS pixels and the physical device pixels.
-//!   In other words, it is the value of [`window.devicePixelRatio`][web_1]. It is affected by
-//!   both the screen scaling and the browser zoom level and can go below `1.0`.
+//! * `serde`: Enables serialization/deserialization of certain types with
+//!   [Serde](https://crates.io/crates/serde).
+//! * `mint`: Enables mint (math interoperability standard types) conversions.
 //!
 //!
 //! [points]: https://en.wikipedia.org/wiki/Point_(typography)
 //! [picas]: https://en.wikipedia.org/wiki/Pica_(typography)
-//! [`ScaleFactorChanged`]: crate::event::WindowEvent::ScaleFactorChanged
-//! [`window.scale_factor()`]: https://docs.rs/winit/latest/winit/window/struct.Window.html#method.scale_factor
-//! [windows_1]: https://docs.microsoft.com/en-us/windows/win32/hidpi/high-dpi-desktop-application-development-on-windows
-//! [apple_1]: https://developer.apple.com/library/archive/documentation/DeviceInformation/Reference/iOSDeviceCompatibility/Displays/Displays.html
-//! [apple_2]: https://developer.apple.com/design/human-interface-guidelines/macos/icons-and-images/image-size-and-resolution/
-//! [android_1]: https://developer.android.com/training/multiscreen/screendensities
-//! [web_1]: https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio
+
+#![cfg_attr(
+    docsrs,
+    feature(doc_auto_cfg, doc_cfg_hide),
+    doc(cfg_hide(doc, docsrs))
+)]
+#![forbid(unsafe_code)]
 
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
@@ -165,10 +128,242 @@ pub fn validate_scale_factor(scale_factor: f64) -> bool {
     scale_factor.is_sign_positive() && scale_factor.is_normal()
 }
 
+/// A logical pixel unit.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Default, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct LogicalUnit<P>(pub P);
+
+impl<P> LogicalUnit<P> {
+    /// Represents a minimum logical unit of [`f64::MAX`].
+    pub const MIN: LogicalUnit<f64> = LogicalUnit::new(f64::MIN);
+    /// Represents a logical unit of `0_f64`.
+    pub const ZERO: LogicalUnit<f64> = LogicalUnit::new(0.0);
+    /// Represents a maximum logical unit that is equal to [`f64::MAX`].
+    pub const MAX: LogicalUnit<f64> = LogicalUnit::new(f64::MAX);
+
+    #[inline]
+    pub const fn new(v: P) -> Self {
+        LogicalUnit(v)
+    }
+}
+
+impl<P: Pixel> LogicalUnit<P> {
+    #[inline]
+    pub fn from_physical<T: Into<PhysicalUnit<X>>, X: Pixel>(
+        physical: T,
+        scale_factor: f64,
+    ) -> Self {
+        physical.into().to_logical(scale_factor)
+    }
+
+    #[inline]
+    pub fn to_physical<X: Pixel>(&self, scale_factor: f64) -> PhysicalUnit<X> {
+        assert!(validate_scale_factor(scale_factor));
+        PhysicalUnit::new(self.0.into() * scale_factor).cast()
+    }
+
+    #[inline]
+    pub fn cast<X: Pixel>(&self) -> LogicalUnit<X> {
+        LogicalUnit(self.0.cast())
+    }
+}
+
+impl<P: Pixel, X: Pixel> From<X> for LogicalUnit<P> {
+    fn from(v: X) -> LogicalUnit<P> {
+        LogicalUnit::new(v.cast())
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for u8 {
+    fn from(v: LogicalUnit<P>) -> u8 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for u16 {
+    fn from(v: LogicalUnit<P>) -> u16 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for u32 {
+    fn from(v: LogicalUnit<P>) -> u32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for i8 {
+    fn from(v: LogicalUnit<P>) -> i8 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for i16 {
+    fn from(v: LogicalUnit<P>) -> i16 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for i32 {
+    fn from(v: LogicalUnit<P>) -> i32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for f32 {
+    fn from(v: LogicalUnit<P>) -> f32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for f64 {
+    fn from(v: LogicalUnit<P>) -> f64 {
+        v.0.cast()
+    }
+}
+
+/// A physical pixel unit.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Default, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct PhysicalUnit<P>(pub P);
+
+impl<P> PhysicalUnit<P> {
+    /// Represents a minimum physical unit of [`f64::MAX`].
+    pub const MIN: LogicalUnit<f64> = LogicalUnit::new(f64::MIN);
+    /// Represents a physical unit of `0_f64`.
+    pub const ZERO: LogicalUnit<f64> = LogicalUnit::new(0.0);
+    /// Represents a maximum physical unit that is equal to [`f64::MAX`].
+    pub const MAX: LogicalUnit<f64> = LogicalUnit::new(f64::MAX);
+
+    #[inline]
+    pub const fn new(v: P) -> Self {
+        PhysicalUnit(v)
+    }
+}
+
+impl<P: Pixel> PhysicalUnit<P> {
+    #[inline]
+    pub fn from_logical<T: Into<LogicalUnit<X>>, X: Pixel>(logical: T, scale_factor: f64) -> Self {
+        logical.into().to_physical(scale_factor)
+    }
+
+    #[inline]
+    pub fn to_logical<X: Pixel>(&self, scale_factor: f64) -> LogicalUnit<X> {
+        assert!(validate_scale_factor(scale_factor));
+        LogicalUnit::new(self.0.into() / scale_factor).cast()
+    }
+
+    #[inline]
+    pub fn cast<X: Pixel>(&self) -> PhysicalUnit<X> {
+        PhysicalUnit(self.0.cast())
+    }
+}
+
+impl<P: Pixel, X: Pixel> From<X> for PhysicalUnit<P> {
+    fn from(v: X) -> PhysicalUnit<P> {
+        PhysicalUnit::new(v.cast())
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for u8 {
+    fn from(v: PhysicalUnit<P>) -> u8 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for u16 {
+    fn from(v: PhysicalUnit<P>) -> u16 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for u32 {
+    fn from(v: PhysicalUnit<P>) -> u32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for i8 {
+    fn from(v: PhysicalUnit<P>) -> i8 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for i16 {
+    fn from(v: PhysicalUnit<P>) -> i16 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for i32 {
+    fn from(v: PhysicalUnit<P>) -> i32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for f32 {
+    fn from(v: PhysicalUnit<P>) -> f32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for f64 {
+    fn from(v: PhysicalUnit<P>) -> f64 {
+        v.0.cast()
+    }
+}
+
+/// A pixel unit that's either physical or logical.
+pub enum PixelUnit {
+    Physical(PhysicalUnit<i32>),
+    Logical(LogicalUnit<f64>),
+}
+
+impl PixelUnit {
+    /// Represents a minimum logical unit of [`f64::MAX`].
+    pub const MIN: PixelUnit = PixelUnit::Logical(LogicalUnit::new(f64::MIN));
+    /// Represents a logical unit of `0_f64`.
+    pub const ZERO: PixelUnit = PixelUnit::Logical(LogicalUnit::new(0.0));
+    /// Represents a maximum logical unit that is equal to [`f64::MAX`].
+    pub const MAX: PixelUnit = PixelUnit::Logical(LogicalUnit::new(f64::MAX));
+
+    pub fn new<S: Into<PixelUnit>>(unit: S) -> PixelUnit {
+        unit.into()
+    }
+
+    pub fn to_logical<P: Pixel>(&self, scale_factor: f64) -> LogicalUnit<P> {
+        match *self {
+            PixelUnit::Physical(unit) => unit.to_logical(scale_factor),
+            PixelUnit::Logical(unit) => unit.cast(),
+        }
+    }
+
+    pub fn to_physical<P: Pixel>(&self, scale_factor: f64) -> PhysicalUnit<P> {
+        match *self {
+            PixelUnit::Physical(unit) => unit.cast(),
+            PixelUnit::Logical(unit) => unit.to_physical(scale_factor),
+        }
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for PixelUnit {
+    #[inline]
+    fn from(unit: PhysicalUnit<P>) -> PixelUnit {
+        PixelUnit::Physical(unit.cast())
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for PixelUnit {
+    #[inline]
+    fn from(unit: LogicalUnit<P>) -> PixelUnit {
+        PixelUnit::Logical(unit.cast())
+    }
+}
+
 /// A position represented in logical pixels.
 ///
 /// The position is stored as floats, so please be careful. Casting floats to integers truncates the
-/// fractional part, which can cause noticable issues. To help with that, an `Into<(i32, i32)>`
+/// fractional part, which can cause noticeable issues. To help with that, an `Into<(i32, i32)>`
 /// implementation is provided which does the rounding for you.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Default, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
@@ -587,15 +782,13 @@ impl<P: Pixel> From<LogicalPosition<P>> for Position {
 
 #[cfg(test)]
 mod tests {
-    use crate::dpi;
+    use super::*;
     use std::collections::HashSet;
 
     macro_rules! test_pixel_int_impl {
         ($($name:ident => $ty:ty),*) => {$(
             #[test]
             fn $name() {
-                use dpi::Pixel;
-
                 assert_eq!(
                     <$ty as Pixel>::from_f64(37.0),
                     37,
@@ -664,8 +857,6 @@ mod tests {
     ($($name:ident => $ty:ty),*) => {$(
         #[test]
         fn $name() {
-            use dpi::Pixel;
-
             assert_approx_eq!(
                 <$ty as Pixel>::from_f64(37.0),
                 37.0,
@@ -758,46 +949,77 @@ mod tests {
 
     #[test]
     fn test_validate_scale_factor() {
-        assert!(dpi::validate_scale_factor(1.0));
-        assert!(dpi::validate_scale_factor(2.0));
-        assert!(dpi::validate_scale_factor(3.0));
-        assert!(dpi::validate_scale_factor(1.5));
-        assert!(dpi::validate_scale_factor(0.5));
+        assert!(validate_scale_factor(1.0));
+        assert!(validate_scale_factor(2.0));
+        assert!(validate_scale_factor(3.0));
+        assert!(validate_scale_factor(1.5));
+        assert!(validate_scale_factor(0.5));
 
-        assert!(!dpi::validate_scale_factor(0.0));
-        assert!(!dpi::validate_scale_factor(-1.0));
-        assert!(!dpi::validate_scale_factor(f64::INFINITY));
-        assert!(!dpi::validate_scale_factor(f64::NAN));
-        assert!(!dpi::validate_scale_factor(f64::NEG_INFINITY));
+        assert!(!validate_scale_factor(0.0));
+        assert!(!validate_scale_factor(-1.0));
+        assert!(!validate_scale_factor(f64::INFINITY));
+        assert!(!validate_scale_factor(f64::NAN));
+        assert!(!validate_scale_factor(f64::NEG_INFINITY));
+    }
+
+    #[test]
+    fn test_logical_unity() {
+        let log_unit = LogicalUnit::new(1.0);
+        assert_eq!(log_unit.to_physical::<u32>(1.0), PhysicalUnit::new(1));
+        assert_eq!(log_unit.to_physical::<u32>(2.0), PhysicalUnit::new(2));
+        assert_eq!(log_unit.cast::<u32>(), LogicalUnit::new(1));
+        assert_eq!(
+            log_unit,
+            LogicalUnit::from_physical(PhysicalUnit::new(1.0), 1.0)
+        );
+        assert_eq!(
+            log_unit,
+            LogicalUnit::from_physical(PhysicalUnit::new(2.0), 2.0)
+        );
+        assert_eq!(LogicalUnit::from(2.0), LogicalUnit::new(2.0));
+
+        let x: f64 = log_unit.into();
+        assert_eq!(x, 1.0);
+    }
+
+    #[test]
+    fn test_physical_unit() {
+        assert_eq!(
+            PhysicalUnit::from_logical(LogicalUnit::new(1.0), 1.0),
+            PhysicalUnit::new(1)
+        );
+        assert_eq!(
+            PhysicalUnit::from_logical(LogicalUnit::new(2.0), 0.5),
+            PhysicalUnit::new(1)
+        );
+        assert_eq!(PhysicalUnit::from(2.0), PhysicalUnit::new(2.0,));
+        assert_eq!(PhysicalUnit::from(2.0), PhysicalUnit::new(2.0));
+
+        let x: f64 = PhysicalUnit::new(1).into();
+        assert_eq!(x, 1.0);
     }
 
     #[test]
     fn test_logical_position() {
-        let log_pos = dpi::LogicalPosition::new(1.0, 2.0);
-        assert_eq!(
-            log_pos.to_physical::<u32>(1.0),
-            dpi::PhysicalPosition::new(1, 2)
-        );
-        assert_eq!(
-            log_pos.to_physical::<u32>(2.0),
-            dpi::PhysicalPosition::new(2, 4)
-        );
-        assert_eq!(log_pos.cast::<u32>(), dpi::LogicalPosition::new(1, 2));
+        let log_pos = LogicalPosition::new(1.0, 2.0);
+        assert_eq!(log_pos.to_physical::<u32>(1.0), PhysicalPosition::new(1, 2));
+        assert_eq!(log_pos.to_physical::<u32>(2.0), PhysicalPosition::new(2, 4));
+        assert_eq!(log_pos.cast::<u32>(), LogicalPosition::new(1, 2));
         assert_eq!(
             log_pos,
-            dpi::LogicalPosition::from_physical(dpi::PhysicalPosition::new(1.0, 2.0), 1.0)
+            LogicalPosition::from_physical(PhysicalPosition::new(1.0, 2.0), 1.0)
         );
         assert_eq!(
             log_pos,
-            dpi::LogicalPosition::from_physical(dpi::PhysicalPosition::new(2.0, 4.0), 2.0)
+            LogicalPosition::from_physical(PhysicalPosition::new(2.0, 4.0), 2.0)
         );
         assert_eq!(
-            dpi::LogicalPosition::from((2.0, 2.0)),
-            dpi::LogicalPosition::new(2.0, 2.0)
+            LogicalPosition::from((2.0, 2.0)),
+            LogicalPosition::new(2.0, 2.0)
         );
         assert_eq!(
-            dpi::LogicalPosition::from([2.0, 3.0]),
-            dpi::LogicalPosition::new(2.0, 3.0)
+            LogicalPosition::from([2.0, 3.0]),
+            LogicalPosition::new(2.0, 3.0)
         );
 
         let x: (f64, f64) = log_pos.into();
@@ -809,56 +1031,44 @@ mod tests {
     #[test]
     fn test_physical_position() {
         assert_eq!(
-            dpi::PhysicalPosition::from_logical(dpi::LogicalPosition::new(1.0, 2.0), 1.0),
-            dpi::PhysicalPosition::new(1, 2)
+            PhysicalPosition::from_logical(LogicalPosition::new(1.0, 2.0), 1.0),
+            PhysicalPosition::new(1, 2)
         );
         assert_eq!(
-            dpi::PhysicalPosition::from_logical(dpi::LogicalPosition::new(2.0, 4.0), 0.5),
-            dpi::PhysicalPosition::new(1, 2)
+            PhysicalPosition::from_logical(LogicalPosition::new(2.0, 4.0), 0.5),
+            PhysicalPosition::new(1, 2)
         );
         assert_eq!(
-            dpi::PhysicalPosition::from((2.0, 2.0)),
-            dpi::PhysicalPosition::new(2.0, 2.0)
+            PhysicalPosition::from((2.0, 2.0)),
+            PhysicalPosition::new(2.0, 2.0)
         );
         assert_eq!(
-            dpi::PhysicalPosition::from([2.0, 3.0]),
-            dpi::PhysicalPosition::new(2.0, 3.0)
+            PhysicalPosition::from([2.0, 3.0]),
+            PhysicalPosition::new(2.0, 3.0)
         );
 
-        let x: (f64, f64) = dpi::PhysicalPosition::new(1, 2).into();
+        let x: (f64, f64) = PhysicalPosition::new(1, 2).into();
         assert_eq!(x, (1.0, 2.0));
-        let x: [f64; 2] = dpi::PhysicalPosition::new(1, 2).into();
+        let x: [f64; 2] = PhysicalPosition::new(1, 2).into();
         assert_eq!(x, [1.0, 2.0]);
     }
 
     #[test]
     fn test_logical_size() {
-        let log_size = dpi::LogicalSize::new(1.0, 2.0);
-        assert_eq!(
-            log_size.to_physical::<u32>(1.0),
-            dpi::PhysicalSize::new(1, 2)
-        );
-        assert_eq!(
-            log_size.to_physical::<u32>(2.0),
-            dpi::PhysicalSize::new(2, 4)
-        );
-        assert_eq!(log_size.cast::<u32>(), dpi::LogicalSize::new(1, 2));
+        let log_size = LogicalSize::new(1.0, 2.0);
+        assert_eq!(log_size.to_physical::<u32>(1.0), PhysicalSize::new(1, 2));
+        assert_eq!(log_size.to_physical::<u32>(2.0), PhysicalSize::new(2, 4));
+        assert_eq!(log_size.cast::<u32>(), LogicalSize::new(1, 2));
         assert_eq!(
             log_size,
-            dpi::LogicalSize::from_physical(dpi::PhysicalSize::new(1.0, 2.0), 1.0)
+            LogicalSize::from_physical(PhysicalSize::new(1.0, 2.0), 1.0)
         );
         assert_eq!(
             log_size,
-            dpi::LogicalSize::from_physical(dpi::PhysicalSize::new(2.0, 4.0), 2.0)
-        );
-        assert_eq!(
-            dpi::LogicalSize::from((2.0, 2.0)),
-            dpi::LogicalSize::new(2.0, 2.0)
-        );
-        assert_eq!(
-            dpi::LogicalSize::from([2.0, 3.0]),
-            dpi::LogicalSize::new(2.0, 3.0)
+            LogicalSize::from_physical(PhysicalSize::new(2.0, 4.0), 2.0)
         );
+        assert_eq!(LogicalSize::from((2.0, 2.0)), LogicalSize::new(2.0, 2.0));
+        assert_eq!(LogicalSize::from([2.0, 3.0]), LogicalSize::new(2.0, 3.0));
 
         let x: (f64, f64) = log_size.into();
         assert_eq!(x, (1.0, 2.0));
@@ -869,136 +1079,130 @@ mod tests {
     #[test]
     fn test_physical_size() {
         assert_eq!(
-            dpi::PhysicalSize::from_logical(dpi::LogicalSize::new(1.0, 2.0), 1.0),
-            dpi::PhysicalSize::new(1, 2)
+            PhysicalSize::from_logical(LogicalSize::new(1.0, 2.0), 1.0),
+            PhysicalSize::new(1, 2)
         );
         assert_eq!(
-            dpi::PhysicalSize::from_logical(dpi::LogicalSize::new(2.0, 4.0), 0.5),
-            dpi::PhysicalSize::new(1, 2)
-        );
-        assert_eq!(
-            dpi::PhysicalSize::from((2.0, 2.0)),
-            dpi::PhysicalSize::new(2.0, 2.0)
-        );
-        assert_eq!(
-            dpi::PhysicalSize::from([2.0, 3.0]),
-            dpi::PhysicalSize::new(2.0, 3.0)
+            PhysicalSize::from_logical(LogicalSize::new(2.0, 4.0), 0.5),
+            PhysicalSize::new(1, 2)
         );
+        assert_eq!(PhysicalSize::from((2.0, 2.0)), PhysicalSize::new(2.0, 2.0));
+        assert_eq!(PhysicalSize::from([2.0, 3.0]), PhysicalSize::new(2.0, 3.0));
 
-        let x: (f64, f64) = dpi::PhysicalSize::new(1, 2).into();
+        let x: (f64, f64) = PhysicalSize::new(1, 2).into();
         assert_eq!(x, (1.0, 2.0));
-        let x: [f64; 2] = dpi::PhysicalSize::new(1, 2).into();
+        let x: [f64; 2] = PhysicalSize::new(1, 2).into();
         assert_eq!(x, [1.0, 2.0]);
     }
 
     #[test]
     fn test_size() {
         assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)),
-            dpi::Size::Physical(dpi::PhysicalSize::new(1, 2))
+            Size::new(PhysicalSize::new(1, 2)),
+            Size::Physical(PhysicalSize::new(1, 2))
         );
         assert_eq!(
-            dpi::Size::new(dpi::LogicalSize::new(1.0, 2.0)),
-            dpi::Size::Logical(dpi::LogicalSize::new(1.0, 2.0))
+            Size::new(LogicalSize::new(1.0, 2.0)),
+            Size::Logical(LogicalSize::new(1.0, 2.0))
         );
 
         assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_logical::<f64>(1.0),
-            dpi::LogicalSize::new(1.0, 2.0)
+            Size::new(PhysicalSize::new(1, 2)).to_logical::<f64>(1.0),
+            LogicalSize::new(1.0, 2.0)
         );
         assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_logical::<f64>(2.0),
-            dpi::LogicalSize::new(0.5, 1.0)
+            Size::new(PhysicalSize::new(1, 2)).to_logical::<f64>(2.0),
+            LogicalSize::new(0.5, 1.0)
         );
         assert_eq!(
-            dpi::Size::new(dpi::LogicalSize::new(1.0, 2.0)).to_logical::<f64>(1.0),
-            dpi::LogicalSize::new(1.0, 2.0)
+            Size::new(LogicalSize::new(1.0, 2.0)).to_logical::<f64>(1.0),
+            LogicalSize::new(1.0, 2.0)
         );
 
         assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_physical::<u32>(1.0),
-            dpi::PhysicalSize::new(1, 2)
+            Size::new(PhysicalSize::new(1, 2)).to_physical::<u32>(1.0),
+            PhysicalSize::new(1, 2)
         );
         assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_physical::<u32>(2.0),
-            dpi::PhysicalSize::new(1, 2)
+            Size::new(PhysicalSize::new(1, 2)).to_physical::<u32>(2.0),
+            PhysicalSize::new(1, 2)
         );
         assert_eq!(
-            dpi::Size::new(dpi::LogicalSize::new(1.0, 2.0)).to_physical::<u32>(1.0),
-            dpi::PhysicalSize::new(1, 2)
+            Size::new(LogicalSize::new(1.0, 2.0)).to_physical::<u32>(1.0),
+            PhysicalSize::new(1, 2)
         );
         assert_eq!(
-            dpi::Size::new(dpi::LogicalSize::new(1.0, 2.0)).to_physical::<u32>(2.0),
-            dpi::PhysicalSize::new(2, 4)
+            Size::new(LogicalSize::new(1.0, 2.0)).to_physical::<u32>(2.0),
+            PhysicalSize::new(2, 4)
         );
 
-        let small = dpi::Size::Physical((1, 2).into());
-        let medium = dpi::Size::Logical((3, 4).into());
-        let medium_physical = dpi::Size::new(medium.to_physical::<u32>(1.0));
-        let large = dpi::Size::Physical((5, 6).into());
-        assert_eq!(dpi::Size::clamp(medium, small, large, 1.0), medium_physical);
-        assert_eq!(dpi::Size::clamp(small, medium, large, 1.0), medium_physical);
-        assert_eq!(dpi::Size::clamp(large, small, medium, 1.0), medium_physical);
+        let small = Size::Physical((1, 2).into());
+        let medium = Size::Logical((3, 4).into());
+        let medium_physical = Size::new(medium.to_physical::<u32>(1.0));
+        let large = Size::Physical((5, 6).into());
+        assert_eq!(Size::clamp(medium, small, large, 1.0), medium_physical);
+        assert_eq!(Size::clamp(small, medium, large, 1.0), medium_physical);
+        assert_eq!(Size::clamp(large, small, medium, 1.0), medium_physical);
     }
 
     #[test]
     fn test_position() {
         assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)),
-            dpi::Position::Physical(dpi::PhysicalPosition::new(1, 2))
+            Position::new(PhysicalPosition::new(1, 2)),
+            Position::Physical(PhysicalPosition::new(1, 2))
         );
         assert_eq!(
-            dpi::Position::new(dpi::LogicalPosition::new(1.0, 2.0)),
-            dpi::Position::Logical(dpi::LogicalPosition::new(1.0, 2.0))
+            Position::new(LogicalPosition::new(1.0, 2.0)),
+            Position::Logical(LogicalPosition::new(1.0, 2.0))
         );
 
         assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_logical::<f64>(1.0),
-            dpi::LogicalPosition::new(1.0, 2.0)
+            Position::new(PhysicalPosition::new(1, 2)).to_logical::<f64>(1.0),
+            LogicalPosition::new(1.0, 2.0)
         );
         assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_logical::<f64>(2.0),
-            dpi::LogicalPosition::new(0.5, 1.0)
+            Position::new(PhysicalPosition::new(1, 2)).to_logical::<f64>(2.0),
+            LogicalPosition::new(0.5, 1.0)
         );
         assert_eq!(
-            dpi::Position::new(dpi::LogicalPosition::new(1.0, 2.0)).to_logical::<f64>(1.0),
-            dpi::LogicalPosition::new(1.0, 2.0)
+            Position::new(LogicalPosition::new(1.0, 2.0)).to_logical::<f64>(1.0),
+            LogicalPosition::new(1.0, 2.0)
         );
 
         assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_physical::<u32>(1.0),
-            dpi::PhysicalPosition::new(1, 2)
+            Position::new(PhysicalPosition::new(1, 2)).to_physical::<u32>(1.0),
+            PhysicalPosition::new(1, 2)
         );
         assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_physical::<u32>(2.0),
-            dpi::PhysicalPosition::new(1, 2)
+            Position::new(PhysicalPosition::new(1, 2)).to_physical::<u32>(2.0),
+            PhysicalPosition::new(1, 2)
         );
         assert_eq!(
-            dpi::Position::new(dpi::LogicalPosition::new(1.0, 2.0)).to_physical::<u32>(1.0),
-            dpi::PhysicalPosition::new(1, 2)
+            Position::new(LogicalPosition::new(1.0, 2.0)).to_physical::<u32>(1.0),
+            PhysicalPosition::new(1, 2)
         );
         assert_eq!(
-            dpi::Position::new(dpi::LogicalPosition::new(1.0, 2.0)).to_physical::<u32>(2.0),
-            dpi::PhysicalPosition::new(2, 4)
+            Position::new(LogicalPosition::new(1.0, 2.0)).to_physical::<u32>(2.0),
+            PhysicalPosition::new(2, 4)
         );
     }
 
     // Eat coverage for the Debug impls et al
     #[test]
     fn ensure_attrs_do_not_panic() {
-        let _ = format!("{:?}", dpi::LogicalPosition::<u32>::default().clone());
-        HashSet::new().insert(dpi::LogicalPosition::<u32>::default());
+        let _ = format!("{:?}", LogicalPosition::<u32>::default().clone());
+        HashSet::new().insert(LogicalPosition::<u32>::default());
 
-        let _ = format!("{:?}", dpi::PhysicalPosition::<u32>::default().clone());
-        HashSet::new().insert(dpi::PhysicalPosition::<u32>::default());
+        let _ = format!("{:?}", PhysicalPosition::<u32>::default().clone());
+        HashSet::new().insert(PhysicalPosition::<u32>::default());
 
-        let _ = format!("{:?}", dpi::LogicalSize::<u32>::default().clone());
-        HashSet::new().insert(dpi::LogicalSize::<u32>::default());
+        let _ = format!("{:?}", LogicalSize::<u32>::default().clone());
+        HashSet::new().insert(LogicalSize::<u32>::default());
 
-        let _ = format!("{:?}", dpi::PhysicalSize::<u32>::default().clone());
-        HashSet::new().insert(dpi::PhysicalSize::<u32>::default());
+        let _ = format!("{:?}", PhysicalSize::<u32>::default().clone());
+        HashSet::new().insert(PhysicalSize::<u32>::default());
 
-        let _ = format!("{:?}", dpi::Size::Physical((1, 2).into()).clone());
-        let _ = format!("{:?}", dpi::Position::Physical((1, 2).into()).clone());
+        let _ = format!("{:?}", Size::Physical((1, 2).into()).clone());
+        let _ = format!("{:?}", Position::Physical((1, 2).into()).clone());
     }
 }

examples/child_window.rs

@@ -1,10 +1,3 @@
-#[cfg(all(
-    feature = "rwh_06",
-    any(x11_platform, macos_platform, windows_platform)
-))]
-#[path = "util/fill.rs"]
-mod fill;
-
 #[cfg(all(
     feature = "rwh_06",
     any(x11_platform, macos_platform, windows_platform)
@@ -13,58 +6,57 @@ mod fill;
 fn main() -> Result<(), impl std::error::Error> {
     use std::collections::HashMap;
 
-    use winit::{
-        dpi::{LogicalPosition, LogicalSize, Position},
-        event::{ElementState, Event, KeyEvent, WindowEvent},
-        event_loop::{EventLoop, EventLoopWindowTarget},
-        raw_window_handle::HasRawWindowHandle,
-        window::{Window, WindowId},
-    };
+    use winit::dpi::{LogicalPosition, LogicalSize, Position};
+    use winit::event::{ElementState, Event, KeyEvent, WindowEvent};
+    use winit::event_loop::{ActiveEventLoop, EventLoop};
+    use winit::raw_window_handle::HasRawWindowHandle;
+    use winit::window::Window;
 
-    fn spawn_child_window(
-        parent: &Window,
-        event_loop: &EventLoopWindowTarget,
-        windows: &mut HashMap<WindowId, Window>,
-    ) {
+    #[path = "util/fill.rs"]
+    mod fill;
+
+    fn spawn_child_window(parent: &Window, event_loop: &ActiveEventLoop) -> Window {
         let parent = parent.raw_window_handle().unwrap();
-        let mut builder = Window::builder()
+        let mut window_attributes = Window::default_attributes()
             .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);
         // `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();
+        window_attributes = unsafe { window_attributes.with_parent_window(Some(parent)) };
 
-        let id = child_window.id();
-        windows.insert(id, child_window);
-        println!("child window created with id: {id:?}");
+        event_loop.create_window(window_attributes).unwrap()
     }
 
     let mut windows = HashMap::new();
 
     let event_loop: EventLoop<()> = EventLoop::new().unwrap();
-    let parent_window = Window::builder()
-        .with_title("parent window")
-        .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
-        .with_inner_size(LogicalSize::new(640.0f32, 480.0f32))
-        .build(&event_loop)
-        .unwrap();
+    let mut parent_window_id = None;
 
-    println!("parent window: {parent_window:?})");
+    event_loop.run(move |event: Event<()>, event_loop| {
+        match event {
+            Event::Resumed => {
+                let attributes = Window::default_attributes()
+                    .with_title("parent window")
+                    .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
+                    .with_inner_size(LogicalSize::new(640.0f32, 480.0f32));
+                let window = event_loop.create_window(attributes).unwrap();
 
-    event_loop.run(move |event: Event<()>, elwt| {
-        if let Event::WindowEvent { event, window_id } = event {
-            match event {
+                parent_window_id = Some(window.id());
+
+                println!("Parent window id: {parent_window_id:?})");
+                windows.insert(window.id(), window);
+            }
+            Event::WindowEvent { window_id, event } => match event {
                 WindowEvent::CloseRequested => {
                     windows.clear();
-                    elwt.exit();
+                    event_loop.exit();
                 }
                 WindowEvent::CursorEntered { device_id: _ } => {
                     // On x11, println when the cursor entered in a window even if the child window is created
                     // by some key inputs.
                     // the child windows are always placed at (0, 0) with size (200, 200) in the parent window,
-                    // so we also can see this log when we move the cursor arround (200, 200) in parent window.
+                    // so we also can see this log when we move the cursor around (200, 200) in parent window.
                     println!("cursor entered in the window {window_id:?}");
                 }
                 WindowEvent::KeyboardInput {
@@ -75,7 +67,11 @@ fn main() -> Result<(), impl std::error::Error> {
                         },
                     ..
                 } => {
-                    spawn_child_window(&parent_window, elwt, &mut windows);
+                    let parent_window = windows.get(&parent_window_id.unwrap()).unwrap();
+                    let child_window = spawn_child_window(parent_window, event_loop);
+                    let child_id = child_window.id();
+                    println!("Child window created with id: {child_id:?}");
+                    windows.insert(child_id, child_window);
                 }
                 WindowEvent::RedrawRequested => {
                     if let Some(window) = windows.get(&window_id) {
@@ -83,15 +79,16 @@ fn main() -> Result<(), impl std::error::Error> {
                     }
                 }
                 _ => (),
-            }
+            },
+            _ => (),
         }
     })
 }
 
-#[cfg(not(all(
+#[cfg(all(
     feature = "rwh_06",
-    any(x11_platform, macos_platform, windows_platform)
-)))]
+    not(any(x11_platform, macos_platform, windows_platform))
+))]
 fn main() {
     panic!("This example is supported only on x11, macOS, and Windows, with the `rwh_06` feature enabled.");
 }

examples/control_flow.rs

@@ -0,0 +1,147 @@
+#![allow(clippy::single_match)]
+
+use std::thread;
+#[cfg(not(web_platform))]
+use std::time;
+
+#[cfg(web_platform)]
+use web_time as time;
+
+use winit::application::ApplicationHandler;
+use winit::event::{ElementState, KeyEvent, StartCause, WindowEvent};
+use winit::event_loop::{ActiveEventLoop, ControlFlow, EventLoop};
+use winit::keyboard::{Key, NamedKey};
+use winit::window::{Window, WindowId};
+
+#[path = "util/fill.rs"]
+mod fill;
+
+const WAIT_TIME: time::Duration = time::Duration::from_millis(100);
+const POLL_SLEEP_TIME: time::Duration = time::Duration::from_millis(100);
+
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq)]
+enum Mode {
+    #[default]
+    Wait,
+    WaitUntil,
+    Poll,
+}
+
+fn main() -> Result<(), impl std::error::Error> {
+    tracing_subscriber::fmt::init();
+
+    println!("Press '1' to switch to Wait mode.");
+    println!("Press '2' to switch to WaitUntil mode.");
+    println!("Press '3' to switch to Poll mode.");
+    println!("Press 'R' to toggle request_redraw() calls.");
+    println!("Press 'Esc' to close the window.");
+
+    let event_loop = EventLoop::new().unwrap();
+
+    let mut app = ControlFlowDemo::default();
+    event_loop.run_app(&mut app)
+}
+
+#[derive(Default)]
+struct ControlFlowDemo {
+    mode: Mode,
+    request_redraw: bool,
+    wait_cancelled: bool,
+    close_requested: bool,
+    window: Option<Window>,
+}
+
+impl ApplicationHandler for ControlFlowDemo {
+    fn new_events(&mut self, _event_loop: &ActiveEventLoop, cause: StartCause) {
+        println!("new_events: {cause:?}");
+
+        self.wait_cancelled = match cause {
+            StartCause::WaitCancelled { .. } => self.mode == Mode::WaitUntil,
+            _ => false,
+        }
+    }
+
+    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+        let window_attributes = Window::default_attributes().with_title(
+            "Press 1, 2, 3 to change control flow mode. Press R to toggle redraw requests.",
+        );
+        self.window = Some(event_loop.create_window(window_attributes).unwrap());
+    }
+
+    fn window_event(
+        &mut self,
+        _event_loop: &ActiveEventLoop,
+        _window_id: WindowId,
+        event: WindowEvent,
+    ) {
+        println!("{event:?}");
+
+        match event {
+            WindowEvent::CloseRequested => {
+                self.close_requested = true;
+            }
+            WindowEvent::KeyboardInput {
+                event:
+                    KeyEvent {
+                        logical_key: key,
+                        state: ElementState::Pressed,
+                        ..
+                    },
+                ..
+            } => match key.as_ref() {
+                // WARNING: Consider using `key_without_modifiers()` if available on your platform.
+                // See the `key_binding` example
+                Key::Character("1") => {
+                    self.mode = Mode::Wait;
+                    println!("\nmode: {:?}\n", self.mode);
+                }
+                Key::Character("2") => {
+                    self.mode = Mode::WaitUntil;
+                    println!("\nmode: {:?}\n", self.mode);
+                }
+                Key::Character("3") => {
+                    self.mode = Mode::Poll;
+                    println!("\nmode: {:?}\n", self.mode);
+                }
+                Key::Character("r") => {
+                    self.request_redraw = !self.request_redraw;
+                    println!("\nrequest_redraw: {}\n", self.request_redraw);
+                }
+                Key::Named(NamedKey::Escape) => {
+                    self.close_requested = true;
+                }
+                _ => (),
+            },
+            WindowEvent::RedrawRequested => {
+                let window = self.window.as_ref().unwrap();
+                window.pre_present_notify();
+                fill::fill_window(window);
+            }
+            _ => (),
+        }
+    }
+
+    fn about_to_wait(&mut self, event_loop: &ActiveEventLoop) {
+        if self.request_redraw && !self.wait_cancelled && !self.close_requested {
+            self.window.as_ref().unwrap().request_redraw();
+        }
+
+        match self.mode {
+            Mode::Wait => event_loop.set_control_flow(ControlFlow::Wait),
+            Mode::WaitUntil => {
+                if !self.wait_cancelled {
+                    event_loop
+                        .set_control_flow(ControlFlow::WaitUntil(time::Instant::now() + WAIT_TIME));
+                }
+            }
+            Mode::Poll => {
+                thread::sleep(POLL_SLEEP_TIME);
+                event_loop.set_control_flow(ControlFlow::Poll);
+            }
+        };
+
+        if self.close_requested {
+            event_loop.exit();
+        }
+    }
+}

examples/pump_events.rs

@@ -0,0 +1,84 @@
+#![allow(clippy::single_match)]
+
+// Limit this example to only compatible platforms.
+#[cfg(any(
+    windows_platform,
+    macos_platform,
+    x11_platform,
+    wayland_platform,
+    android_platform,
+))]
+fn main() -> std::process::ExitCode {
+    use std::{process::ExitCode, thread::sleep, time::Duration};
+
+    use winit::application::ApplicationHandler;
+    use winit::event::WindowEvent;
+    use winit::event_loop::{ActiveEventLoop, EventLoop};
+    use winit::platform::pump_events::{EventLoopExtPumpEvents, PumpStatus};
+    use winit::window::{Window, WindowId};
+
+    #[path = "util/fill.rs"]
+    mod fill;
+
+    #[derive(Default)]
+    struct PumpDemo {
+        window: Option<Window>,
+    }
+
+    impl ApplicationHandler for PumpDemo {
+        fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+            let window_attributes = Window::default_attributes().with_title("A fantastic window!");
+            self.window = Some(event_loop.create_window(window_attributes).unwrap());
+        }
+
+        fn window_event(
+            &mut self,
+            event_loop: &ActiveEventLoop,
+            _window_id: WindowId,
+            event: WindowEvent,
+        ) {
+            println!("{event:?}");
+
+            let window = match self.window.as_ref() {
+                Some(window) => window,
+                None => return,
+            };
+
+            match event {
+                WindowEvent::CloseRequested => event_loop.exit(),
+                WindowEvent::RedrawRequested => {
+                    fill::fill_window(window);
+                    window.request_redraw();
+                }
+                _ => (),
+            }
+        }
+    }
+
+    let mut event_loop = EventLoop::new().unwrap();
+
+    tracing_subscriber::fmt::init();
+
+    let mut app = PumpDemo::default();
+
+    loop {
+        let timeout = Some(Duration::ZERO);
+        let status = event_loop.pump_app_events(timeout, &mut app);
+
+        if let PumpStatus::Exit(exit_code) = status {
+            break ExitCode::from(exit_code as u8);
+        }
+
+        // Sleep for 1/60 second to simulate application work
+        //
+        // Since `pump_events` doesn't block it will be important to
+        // throttle the loop in the app somehow.
+        println!("Update()");
+        sleep(Duration::from_millis(16));
+    }
+}
+
+#[cfg(any(ios_platform, web_platform, orbital_platform))]
+fn main() {
+    println!("This platform doesn't support pump_events.");
+}

examples/run_on_demand.rs

@@ -0,0 +1,98 @@
+#![allow(clippy::single_match)]
+
+// Limit this example to only compatible platforms.
+#[cfg(any(windows_platform, macos_platform, x11_platform, wayland_platform,))]
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    use std::time::Duration;
+
+    use winit::application::ApplicationHandler;
+    use winit::event::WindowEvent;
+    use winit::event_loop::{ActiveEventLoop, EventLoop};
+    use winit::platform::run_on_demand::EventLoopExtRunOnDemand;
+    use winit::window::{Window, WindowId};
+
+    #[path = "util/fill.rs"]
+    mod fill;
+
+    #[derive(Default)]
+    struct App {
+        idx: usize,
+        window_id: Option<WindowId>,
+        window: Option<Window>,
+    }
+
+    impl ApplicationHandler for App {
+        fn about_to_wait(&mut self, _event_loop: &ActiveEventLoop) {
+            if let Some(window) = self.window.as_ref() {
+                window.request_redraw();
+            }
+        }
+
+        fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+            let window_attributes = Window::default_attributes()
+                .with_title("Fantastic window number one!")
+                .with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0));
+            let window = event_loop.create_window(window_attributes).unwrap();
+            self.window_id = Some(window.id());
+            self.window = Some(window);
+        }
+
+        fn window_event(
+            &mut self,
+            event_loop: &ActiveEventLoop,
+            window_id: WindowId,
+            event: WindowEvent,
+        ) {
+            if event == WindowEvent::Destroyed && self.window_id == Some(window_id) {
+                println!(
+                    "--------------------------------------------------------- Window {} Destroyed",
+                    self.idx
+                );
+                self.window_id = None;
+                event_loop.exit();
+                return;
+            }
+
+            let window = match self.window.as_mut() {
+                Some(window) => window,
+                None => return,
+            };
+
+            match event {
+                WindowEvent::CloseRequested => {
+                    println!("--------------------------------------------------------- Window {} CloseRequested", self.idx);
+                    fill::cleanup_window(window);
+                    self.window = None;
+                }
+                WindowEvent::RedrawRequested => {
+                    fill::fill_window(window);
+                }
+                _ => (),
+            }
+        }
+    }
+
+    tracing_subscriber::fmt::init();
+
+    let mut event_loop = EventLoop::new().unwrap();
+
+    let mut app = App {
+        idx: 1,
+        ..Default::default()
+    };
+    event_loop.run_app_on_demand(&mut app)?;
+
+    println!("--------------------------------------------------------- Finished first loop");
+    println!("--------------------------------------------------------- Waiting 5 seconds");
+    std::thread::sleep(Duration::from_secs(5));
+
+    app.idx += 1;
+    event_loop.run_app_on_demand(&mut app)?;
+    println!("--------------------------------------------------------- Finished second loop");
+    Ok(())
+}
+
+#[cfg(not(any(windows_platform, macos_platform, x11_platform, wayland_platform,)))]
+fn main() {
+    println!("This example is not supported on this platform");
+}

examples/util/fill.rs

@@ -28,7 +28,7 @@ mod platform {
         // 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));
+        static GC: ManuallyDrop<RefCell<Option<GraphicsContext>>> = const { ManuallyDrop::new(RefCell::new(None)) };
     }
 
     /// The graphics context used to draw to a window.

examples/window.rs

@@ -0,0 +1,984 @@
+//! Simple winit application.
+
+use std::collections::HashMap;
+use std::error::Error;
+use std::fmt;
+use std::fmt::Debug;
+#[cfg(not(any(android_platform, ios_platform)))]
+use std::num::NonZeroU32;
+use std::path::Path;
+
+use cursor_icon::CursorIcon;
+#[cfg(not(any(android_platform, ios_platform)))]
+use rwh_05::HasRawDisplayHandle;
+#[cfg(not(any(android_platform, ios_platform)))]
+use softbuffer::{Context, Surface};
+
+use winit::application::ApplicationHandler;
+use winit::dpi::{LogicalSize, PhysicalPosition, PhysicalSize};
+use winit::event::{DeviceEvent, DeviceId, Ime, WindowEvent};
+use winit::event::{MouseButton, MouseScrollDelta};
+use winit::event_loop::{ActiveEventLoop, EventLoop};
+use winit::keyboard::{Key, ModifiersState};
+use winit::window::{
+    Cursor, CursorGrabMode, CustomCursor, CustomCursorSource, Fullscreen, Icon, ResizeDirection,
+    Theme,
+};
+use winit::window::{Window, WindowId};
+
+#[cfg(macos_platform)]
+use winit::platform::macos::{OptionAsAlt, WindowAttributesExtMacOS, WindowExtMacOS};
+#[cfg(any(x11_platform, wayland_platform))]
+use winit::platform::startup_notify::{
+    self, EventLoopExtStartupNotify, WindowAttributesExtStartupNotify, WindowExtStartupNotify,
+};
+
+/// The amount of points to around the window for drag resize direction calculations.
+const BORDER_SIZE: f64 = 20.;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let event_loop = EventLoop::<UserEvent>::with_user_event().build()?;
+    let _event_loop_proxy = event_loop.create_proxy();
+
+    // Wire the user event from another thread.
+    #[cfg(not(web_platform))]
+    std::thread::spawn(move || {
+        // Wake up the `event_loop` once every second and dispatch a custom event
+        // from a different thread.
+        println!("Starting to send user event every second");
+        loop {
+            let _ = _event_loop_proxy.send_event(UserEvent::WakeUp);
+            std::thread::sleep(std::time::Duration::from_secs(1));
+        }
+    });
+
+    let mut state = Application::new(&event_loop);
+
+    event_loop.run_app(&mut state).map_err(Into::into)
+}
+
+#[allow(dead_code)]
+#[derive(Debug, Clone, Copy)]
+enum UserEvent {
+    WakeUp,
+}
+
+/// Application state and event handling.
+struct Application {
+    /// Custom cursors assets.
+    custom_cursors: Vec<CustomCursor>,
+    /// Application icon.
+    icon: Icon,
+    windows: HashMap<WindowId, WindowState>,
+    /// Drawing context.
+    ///
+    /// With OpenGL it could be EGLDisplay.
+    #[cfg(not(any(android_platform, ios_platform)))]
+    context: Option<Context>,
+}
+
+impl Application {
+    fn new<T>(event_loop: &EventLoop<T>) -> Self {
+        // SAFETY: we drop the context right before the event loop is stopped, thus making it safe.
+        #[cfg(not(any(android_platform, ios_platform)))]
+        let context = Some(unsafe { Context::from_raw(event_loop.raw_display_handle()).unwrap() });
+
+        // You'll have to choose an icon size at your own discretion. On X11, the desired size varies
+        // by WM, and on Windows, you still have to account for screen scaling. Here we use 32px,
+        // since it seems to work well enough in most cases. Be careful about going too high, or
+        // you'll be bitten by the low-quality downscaling built into the WM.
+        let path = concat!(env!("CARGO_MANIFEST_DIR"), "/examples/data/icon.png");
+
+        let icon = load_icon(Path::new(path));
+
+        println!("Loading cursor assets");
+        let custom_cursors = vec![
+            event_loop.create_custom_cursor(decode_cursor(include_bytes!("data/cross.png"))),
+            event_loop.create_custom_cursor(decode_cursor(include_bytes!("data/cross2.png"))),
+            event_loop.create_custom_cursor(decode_cursor(include_bytes!("data/gradient.png"))),
+        ];
+
+        Self {
+            #[cfg(not(any(android_platform, ios_platform)))]
+            context,
+            custom_cursors,
+            icon,
+            windows: Default::default(),
+        }
+    }
+
+    fn create_window(
+        &mut self,
+        event_loop: &ActiveEventLoop,
+        _tab_id: Option<String>,
+    ) -> Result<WindowId, Box<dyn Error>> {
+        // TODO read-out activation token.
+
+        #[allow(unused_mut)]
+        let mut window_attributes = Window::default_attributes()
+            .with_title("Winit window")
+            .with_transparent(true)
+            .with_window_icon(Some(self.icon.clone()));
+
+        #[cfg(any(x11_platform, wayland_platform))]
+        if let Some(token) = event_loop.read_token_from_env() {
+            startup_notify::reset_activation_token_env();
+            println!("Using token {:?} to activate a window", token);
+            window_attributes = window_attributes.with_activation_token(token);
+        }
+
+        #[cfg(macos_platform)]
+        if let Some(tab_id) = _tab_id {
+            window_attributes = window_attributes.with_tabbing_identifier(&tab_id);
+        }
+
+        let window = event_loop.create_window(window_attributes)?;
+
+        #[cfg(ios_platform)]
+        {
+            use winit::platform::ios::WindowExtIOS;
+            window.recognize_doubletap_gesture(true);
+            window.recognize_pinch_gesture(true);
+            window.recognize_rotation_gesture(true);
+        }
+
+        let window_state = WindowState::new(self, window)?;
+        let window_id = window_state.window.id();
+        println!("Created new window with id={window_id:?}");
+        self.windows.insert(window_id, window_state);
+        Ok(window_id)
+    }
+
+    fn handle_action(&mut self, event_loop: &ActiveEventLoop, window_id: WindowId, action: Action) {
+        // let cursor_position = self.cursor_position;
+        let window = self.windows.get_mut(&window_id).unwrap();
+        println!("Executing action: {action:?}");
+        match action {
+            Action::CloseWindow => {
+                let _ = self.windows.remove(&window_id);
+            }
+            Action::CreateNewWindow => {
+                #[cfg(any(x11_platform, wayland_platform))]
+                if let Err(err) = window.window.request_activation_token() {
+                    println!("Failed to get activation token: {err}");
+                } else {
+                    return;
+                }
+
+                if let Err(err) = self.create_window(event_loop, None) {
+                    eprintln!("Error creating new window: {err}");
+                }
+            }
+            Action::ToggleResizeIncrements => window.toggle_resize_increments(),
+            Action::ToggleCursorVisibility => window.toggle_cursor_visibility(),
+            Action::ToggleResizable => window.toggle_resizable(),
+            Action::ToggleDecorations => window.toggle_decorations(),
+            Action::ToggleFullscreen => window.toggle_fullscreen(),
+            Action::ToggleMaximize => window.toggle_maximize(),
+            Action::ToggleImeInput => window.toggle_ime(),
+            Action::Minimize => window.minimize(),
+            Action::NextCursor => window.next_cursor(),
+            Action::NextCustomCursor => window.next_custom_cursor(&self.custom_cursors),
+            Action::CycleCursorGrab => window.cycle_cursor_grab(),
+            Action::DragWindow => window.drag_window(),
+            Action::DragResizeWindow => window.drag_resize_window(),
+            Action::ShowWindowMenu => window.show_menu(),
+            Action::PrintHelp => self.print_help(),
+            #[cfg(macos_platform)]
+            Action::CycleOptionAsAlt => window.cycle_option_as_alt(),
+            #[cfg(macos_platform)]
+            Action::CreateNewTab => {
+                let tab_id = window.window.tabbing_identifier();
+                if let Err(err) = self.create_window(event_loop, Some(tab_id)) {
+                    eprintln!("Error creating new window: {err}");
+                }
+            }
+        }
+    }
+
+    fn dump_monitors(&self, event_loop: &ActiveEventLoop) {
+        println!("Monitors information");
+        let primary_monitor = event_loop.primary_monitor();
+        for monitor in event_loop.available_monitors() {
+            let intro = if primary_monitor.as_ref() == Some(&monitor) {
+                "Primary monitor"
+            } else {
+                "Monitor"
+            };
+
+            if let Some(name) = monitor.name() {
+                println!("{intro}: {name}");
+            } else {
+                println!("{intro}: [no name]");
+            }
+
+            let PhysicalSize { width, height } = monitor.size();
+            print!("  Current mode: {width}x{height}");
+            if let Some(m_hz) = monitor.refresh_rate_millihertz() {
+                println!(" @ {}.{} Hz", m_hz / 1000, m_hz % 1000);
+            } else {
+                println!();
+            }
+
+            let PhysicalPosition { x, y } = monitor.position();
+            println!("  Position: {x},{y}");
+
+            println!("  Scale factor: {}", monitor.scale_factor());
+
+            println!("  Available modes (width x height x bit-depth):");
+            for mode in monitor.video_modes() {
+                let PhysicalSize { width, height } = mode.size();
+                let bits = mode.bit_depth();
+                let m_hz = mode.refresh_rate_millihertz();
+                println!(
+                    "    {width}x{height}x{bits} @ {}.{} Hz",
+                    m_hz / 1000,
+                    m_hz % 1000
+                );
+            }
+        }
+    }
+
+    /// Process the key binding.
+    fn process_key_binding(key: &str, mods: &ModifiersState) -> Option<Action> {
+        KEY_BINDINGS.iter().find_map(|binding| {
+            binding
+                .is_triggered_by(&key, mods)
+                .then_some(binding.action)
+        })
+    }
+
+    /// Process mouse binding.
+    fn process_mouse_binding(button: MouseButton, mods: &ModifiersState) -> Option<Action> {
+        MOUSE_BINDINGS.iter().find_map(|binding| {
+            binding
+                .is_triggered_by(&button, mods)
+                .then_some(binding.action)
+        })
+    }
+
+    fn print_help(&self) {
+        println!("Keyboard bindings:");
+        for binding in KEY_BINDINGS {
+            println!(
+                "{}{:<10} - {} ({})",
+                modifiers_to_string(binding.mods),
+                binding.trigger,
+                binding.action,
+                binding.action.help(),
+            );
+        }
+        println!("Mouse bindings:");
+        for binding in MOUSE_BINDINGS {
+            println!(
+                "{}{:<10} - {} ({})",
+                modifiers_to_string(binding.mods),
+                mouse_button_to_string(binding.trigger),
+                binding.action,
+                binding.action.help(),
+            );
+        }
+    }
+}
+
+impl ApplicationHandler<UserEvent> for Application {
+    fn user_event(&mut self, _event_loop: &ActiveEventLoop, event: UserEvent) {
+        println!("User event: {event:?}");
+    }
+
+    fn window_event(
+        &mut self,
+        event_loop: &ActiveEventLoop,
+        window_id: WindowId,
+        event: WindowEvent,
+    ) {
+        let window = match self.windows.get_mut(&window_id) {
+            Some(window) => window,
+            None => return,
+        };
+
+        match event {
+            WindowEvent::Resized(size) => {
+                window.resize(size);
+            }
+            WindowEvent::Focused(focused) => {
+                if focused {
+                    println!("Window={window_id:?} fosused");
+                } else {
+                    println!("Window={window_id:?} unfosused");
+                }
+            }
+            WindowEvent::ScaleFactorChanged { scale_factor, .. } => {
+                println!("Window={window_id:?} changed scale to {scale_factor}");
+            }
+            WindowEvent::ThemeChanged(theme) => {
+                println!("Theme changed to {theme:?}");
+                window.set_theme(theme);
+            }
+            WindowEvent::RedrawRequested => {
+                if let Err(err) = window.draw() {
+                    eprintln!("Error drawing window: {err}");
+                }
+            }
+            WindowEvent::Occluded(occluded) => {
+                window.set_occluded(occluded);
+            }
+            WindowEvent::CloseRequested => {
+                println!("Closing Window={window_id:?}");
+                self.windows.remove(&window_id);
+            }
+            WindowEvent::ModifiersChanged(modifiers) => {
+                window.modifiers = modifiers.state();
+                println!("Modifiers changed to {:?}", window.modifiers);
+            }
+            WindowEvent::MouseWheel { delta, .. } => match delta {
+                MouseScrollDelta::LineDelta(x, y) => {
+                    println!("Mouse wheel Line Delta: ({x},{y})");
+                }
+                MouseScrollDelta::PixelDelta(px) => {
+                    println!("Mouse wheel Pixel Delta: ({},{})", px.x, px.y);
+                }
+            },
+            WindowEvent::KeyboardInput {
+                event,
+                is_synthetic: false,
+                ..
+            } => {
+                let mods = window.modifiers;
+
+                // Dispatch actions only on press.
+                if event.state.is_pressed() {
+                    let action = if let Key::Character(ch) = event.logical_key.as_ref() {
+                        Self::process_key_binding(&ch.to_uppercase(), &mods)
+                    } else {
+                        None
+                    };
+
+                    if let Some(action) = action {
+                        self.handle_action(event_loop, window_id, action);
+                    }
+                }
+            }
+            WindowEvent::MouseInput { button, state, .. } => {
+                let mods = window.modifiers;
+                if let Some(action) = state
+                    .is_pressed()
+                    .then(|| Self::process_mouse_binding(button, &mods))
+                    .flatten()
+                {
+                    self.handle_action(event_loop, window_id, action);
+                }
+            }
+            WindowEvent::CursorLeft { .. } => {
+                println!("Cursor left Window={window_id:?}");
+                window.cursor_left();
+            }
+            WindowEvent::CursorMoved { position, .. } => {
+                println!("Moved cursor to {position:?}");
+                window.cursor_moved(position);
+            }
+            WindowEvent::ActivationTokenDone { token: _token, .. } => {
+                #[cfg(any(x11_platform, wayland_platform))]
+                {
+                    startup_notify::set_activation_token_env(_token);
+                    if let Err(err) = self.create_window(event_loop, None) {
+                        eprintln!("Error creating new window: {err}");
+                    }
+                }
+            }
+            WindowEvent::Ime(event) => match event {
+                Ime::Enabled => println!("IME enabled for Window={window_id:?}"),
+                Ime::Preedit(text, caret_pos) => {
+                    println!("Preedit: {}, with caret at {:?}", text, caret_pos);
+                }
+                Ime::Commit(text) => {
+                    println!("Committed: {}", text);
+                }
+                Ime::Disabled => println!("IME disabled for Window={window_id:?}"),
+            },
+            WindowEvent::PinchGesture { delta, .. } => {
+                window.zoom += delta;
+                let zoom = window.zoom;
+                if delta > 0.0 {
+                    println!("Zoomed in {delta:.5} (now: {zoom:.5})");
+                } else {
+                    println!("Zoomed out {delta:.5} (now: {zoom:.5})");
+                }
+            }
+            WindowEvent::RotationGesture { delta, .. } => {
+                window.rotated += delta;
+                let rotated = window.rotated;
+                if delta > 0.0 {
+                    println!("Rotated counterclockwise {delta:.5} (now: {rotated:.5})");
+                } else {
+                    println!("Rotated clockwise {delta:.5} (now: {rotated:.5})");
+                }
+            }
+            WindowEvent::DoubleTapGesture { .. } => {
+                println!("Smart zoom");
+            }
+            WindowEvent::TouchpadPressure { .. }
+            | WindowEvent::HoveredFileCancelled
+            | WindowEvent::KeyboardInput { .. }
+            | WindowEvent::CursorEntered { .. }
+            | WindowEvent::AxisMotion { .. }
+            | WindowEvent::DroppedFile(_)
+            | WindowEvent::HoveredFile(_)
+            | WindowEvent::Destroyed
+            | WindowEvent::Touch(_)
+            | WindowEvent::Moved(_) => (),
+        }
+    }
+
+    fn device_event(
+        &mut self,
+        _event_loop: &ActiveEventLoop,
+        device_id: DeviceId,
+        event: DeviceEvent,
+    ) {
+        println!("Device {device_id:?} event: {event:?}");
+    }
+
+    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+        println!("Resumed the event loop");
+        self.dump_monitors(event_loop);
+
+        // Create initial window.
+        self.create_window(event_loop, None)
+            .expect("failed to create initial window");
+
+        self.print_help();
+    }
+
+    fn about_to_wait(&mut self, event_loop: &ActiveEventLoop) {
+        if self.windows.is_empty() {
+            println!("No windows left, exiting...");
+            event_loop.exit();
+        }
+    }
+
+    #[cfg(not(any(android_platform, ios_platform)))]
+    fn exiting(&mut self, _event_loop: &ActiveEventLoop) {
+        // We must drop the context here.
+        self.context = None;
+    }
+}
+
+/// State of the window.
+struct WindowState {
+    /// IME input.
+    ime: bool,
+    /// Render surface.
+    ///
+    /// NOTE: This surface must be dropped before the `Window`.
+    #[cfg(not(any(android_platform, ios_platform)))]
+    surface: Surface,
+    /// The actual winit Window.
+    window: Window,
+    /// The window theme we're drawing with.
+    theme: Theme,
+    /// Cursor position over the window.
+    cursor_position: Option<PhysicalPosition<f64>>,
+    /// Window modifiers state.
+    modifiers: ModifiersState,
+    /// Occlusion state of the window.
+    occluded: bool,
+    /// Current cursor grab mode.
+    cursor_grab: CursorGrabMode,
+    /// The amount of zoom into window.
+    zoom: f64,
+    /// The amount of rotation of the window.
+    rotated: f32,
+
+    #[cfg(macos_platform)]
+    option_as_alt: OptionAsAlt,
+
+    // Cursor states.
+    named_idx: usize,
+    custom_idx: usize,
+    cursor_hidden: bool,
+}
+
+impl WindowState {
+    fn new(app: &Application, window: Window) -> Result<Self, Box<dyn Error>> {
+        // SAFETY: the surface is dropped before the `window` which provided it with handle, thus
+        // it doesn't outlive it.
+        #[cfg(not(any(android_platform, ios_platform)))]
+        let surface = unsafe { Surface::new(app.context.as_ref().unwrap(), &window)? };
+
+        let theme = window.theme().unwrap_or(Theme::Dark);
+        println!("Theme: {theme:?}");
+        let named_idx = 0;
+        window.set_cursor(CURSORS[named_idx]);
+
+        // Allow IME out of the box.
+        let ime = true;
+        window.set_ime_allowed(ime);
+
+        let size = window.inner_size();
+        let mut state = Self {
+            #[cfg(macos_platform)]
+            option_as_alt: window.option_as_alt(),
+            custom_idx: app.custom_cursors.len() - 1,
+            cursor_grab: CursorGrabMode::None,
+            named_idx,
+            #[cfg(not(any(android_platform, ios_platform)))]
+            surface,
+            window,
+            theme,
+            ime,
+            cursor_position: Default::default(),
+            cursor_hidden: Default::default(),
+            modifiers: Default::default(),
+            occluded: Default::default(),
+            rotated: Default::default(),
+            zoom: Default::default(),
+        };
+
+        state.resize(size);
+        Ok(state)
+    }
+
+    pub fn toggle_ime(&mut self) {
+        self.ime = !self.ime;
+        self.window.set_ime_allowed(self.ime);
+        if let Some(position) = self.ime.then_some(self.cursor_position).flatten() {
+            self.window
+                .set_ime_cursor_area(position, PhysicalSize::new(20, 20));
+        }
+    }
+
+    pub fn minimize(&mut self) {
+        self.window.set_minimized(true);
+    }
+
+    pub fn cursor_moved(&mut self, position: PhysicalPosition<f64>) {
+        self.cursor_position = Some(position);
+        if self.ime {
+            self.window
+                .set_ime_cursor_area(position, PhysicalSize::new(20, 20));
+        }
+    }
+
+    pub fn cursor_left(&mut self) {
+        self.cursor_position = None;
+    }
+
+    /// Toggle maximized.
+    fn toggle_maximize(&self) {
+        let maximized = self.window.is_maximized();
+        self.window.set_maximized(!maximized);
+    }
+
+    /// Toggle window decorations.
+    fn toggle_decorations(&self) {
+        let decorated = self.window.is_decorated();
+        self.window.set_decorations(!decorated);
+    }
+
+    /// Toggle window resizable state.
+    fn toggle_resizable(&self) {
+        let resizable = self.window.is_resizable();
+        self.window.set_resizable(!resizable);
+    }
+
+    /// Toggle cursor visibility
+    fn toggle_cursor_visibility(&mut self) {
+        self.cursor_hidden = !self.cursor_hidden;
+        self.window.set_cursor_visible(!self.cursor_hidden);
+    }
+
+    /// Toggle resize increments on a window.
+    fn toggle_resize_increments(&mut self) {
+        let new_increments = match self.window.resize_increments() {
+            Some(_) => None,
+            None => Some(LogicalSize::new(25.0, 25.0)),
+        };
+        println!("Had increments: {}", new_increments.is_none());
+        self.window.set_resize_increments(new_increments);
+    }
+
+    /// Toggle fullscreen.
+    fn toggle_fullscreen(&self) {
+        let fullscreen = if self.window.fullscreen().is_some() {
+            None
+        } else {
+            Some(Fullscreen::Borderless(None))
+        };
+
+        self.window.set_fullscreen(fullscreen);
+    }
+
+    /// Cycle through the grab modes ignoring errors.
+    fn cycle_cursor_grab(&mut self) {
+        self.cursor_grab = match self.cursor_grab {
+            CursorGrabMode::None => CursorGrabMode::Confined,
+            CursorGrabMode::Confined => CursorGrabMode::Locked,
+            CursorGrabMode::Locked => CursorGrabMode::None,
+        };
+        println!("Changing cursor grab mode to {:?}", self.cursor_grab);
+        if let Err(err) = self.window.set_cursor_grab(self.cursor_grab) {
+            eprintln!("Error setting cursor grab: {err}");
+        }
+    }
+
+    #[cfg(macos_platform)]
+    fn cycle_option_as_alt(&mut self) {
+        self.option_as_alt = match self.option_as_alt {
+            OptionAsAlt::None => OptionAsAlt::OnlyLeft,
+            OptionAsAlt::OnlyLeft => OptionAsAlt::OnlyRight,
+            OptionAsAlt::OnlyRight => OptionAsAlt::Both,
+            OptionAsAlt::Both => OptionAsAlt::None,
+        };
+        println!("Setting option as alt {:?}", self.option_as_alt);
+        self.window.set_option_as_alt(self.option_as_alt);
+    }
+
+    /// Pick the next cursor.
+    fn next_cursor(&mut self) {
+        self.named_idx = (self.named_idx + 1) % CURSORS.len();
+        println!("Setting cursor to \"{:?}\"", CURSORS[self.named_idx]);
+        self.window
+            .set_cursor(Cursor::Icon(CURSORS[self.named_idx]));
+    }
+
+    /// Pick the next custom cursor.
+    fn next_custom_cursor(&mut self, custom_cursors: &[CustomCursor]) {
+        self.custom_idx = (self.custom_idx + 1) % custom_cursors.len();
+        let cursor = Cursor::Custom(custom_cursors[self.custom_idx].clone());
+        self.window.set_cursor(cursor);
+    }
+
+    /// Resize the window to the new size.
+    fn resize(&mut self, _size: PhysicalSize<u32>) {
+        #[cfg(not(any(android_platform, ios_platform)))]
+        {
+            let (width, height) =
+                match (NonZeroU32::new(_size.width), NonZeroU32::new(_size.height)) {
+                    (Some(width), Some(height)) => (width, height),
+                    _ => return,
+                };
+            self.surface
+                .resize(width, height)
+                .expect("failed to resize inner buffer");
+        }
+        self.window.request_redraw();
+    }
+
+    /// Change the theme.
+    fn set_theme(&mut self, theme: Theme) {
+        self.theme = theme;
+        self.window.request_redraw();
+    }
+
+    /// Show window menu.
+    fn show_menu(&self) {
+        if let Some(position) = self.cursor_position {
+            self.window.show_window_menu(position);
+        }
+    }
+
+    /// Drag the window.
+    fn drag_window(&self) {
+        if let Err(err) = self.window.drag_window() {
+            println!("Error starting window drag: {err}");
+        } else {
+            println!("Dragging window Window={:?}", self.window.id());
+        }
+    }
+
+    /// Drag-resize the window.
+    fn drag_resize_window(&self) {
+        let position = match self.cursor_position {
+            Some(position) => position,
+            None => {
+                println!("Drag-resize requires cursor to be inside the window");
+                return;
+            }
+        };
+
+        let win_size = self.window.inner_size();
+        let border_size = BORDER_SIZE * self.window.scale_factor();
+
+        let x_direction = if position.x < border_size {
+            ResizeDirection::West
+        } else if position.x > (win_size.width as f64 - border_size) {
+            ResizeDirection::East
+        } else {
+            // Use arbitrary direction instead of None for simplicity.
+            ResizeDirection::SouthEast
+        };
+
+        let y_direction = if position.y < border_size {
+            ResizeDirection::North
+        } else if position.y > (win_size.height as f64 - border_size) {
+            ResizeDirection::South
+        } else {
+            // Use arbitrary direction instead of None for simplicity.
+            ResizeDirection::SouthEast
+        };
+
+        let direction = match (x_direction, y_direction) {
+            (ResizeDirection::West, ResizeDirection::North) => ResizeDirection::NorthWest,
+            (ResizeDirection::West, ResizeDirection::South) => ResizeDirection::SouthWest,
+            (ResizeDirection::West, _) => ResizeDirection::West,
+            (ResizeDirection::East, ResizeDirection::North) => ResizeDirection::NorthEast,
+            (ResizeDirection::East, ResizeDirection::South) => ResizeDirection::SouthEast,
+            (ResizeDirection::East, _) => ResizeDirection::East,
+            (_, ResizeDirection::South) => ResizeDirection::South,
+            (_, ResizeDirection::North) => ResizeDirection::North,
+            _ => return,
+        };
+
+        if let Err(err) = self.window.drag_resize_window(direction) {
+            println!("Error starting window drag-resize: {err}");
+        } else {
+            println!("Drag-resizing window Window={:?}", self.window.id());
+        }
+    }
+
+    /// Change window occlusion state.
+    fn set_occluded(&mut self, occluded: bool) {
+        self.occluded = occluded;
+        if !occluded {
+            self.window.request_redraw();
+        }
+    }
+
+    /// Draw the window contents.
+    #[cfg(not(any(android_platform, ios_platform)))]
+    fn draw(&mut self) -> Result<(), Box<dyn Error>> {
+        if self.occluded {
+            println!("Skipping drawing occluded window={:?}", self.window.id());
+            return Ok(());
+        }
+
+        const WHITE: u32 = 0xFFFFFFFF;
+        const DARK_GRAY: u32 = 0xFF181818;
+
+        let color = match self.theme {
+            Theme::Light => WHITE,
+            Theme::Dark => DARK_GRAY,
+        };
+
+        let mut buffer = self.surface.buffer_mut()?;
+        buffer.fill(color);
+        self.window.pre_present_notify();
+        buffer.present()?;
+        Ok(())
+    }
+
+    #[cfg(any(android_platform, ios_platform))]
+    fn draw(&mut self) -> Result<(), Box<dyn Error>> {
+        println!("Drawing but without rendering...");
+        Ok(())
+    }
+}
+
+struct Binding<T: Eq> {
+    trigger: T,
+    mods: ModifiersState,
+    action: Action,
+}
+
+impl<T: Eq> Binding<T> {
+    const fn new(trigger: T, mods: ModifiersState, action: Action) -> Self {
+        Self {
+            trigger,
+            mods,
+            action,
+        }
+    }
+
+    fn is_triggered_by(&self, trigger: &T, mods: &ModifiersState) -> bool {
+        &self.trigger == trigger && &self.mods == mods
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum Action {
+    CloseWindow,
+    ToggleCursorVisibility,
+    CreateNewWindow,
+    ToggleResizeIncrements,
+    ToggleImeInput,
+    ToggleDecorations,
+    ToggleResizable,
+    ToggleFullscreen,
+    ToggleMaximize,
+    Minimize,
+    NextCursor,
+    NextCustomCursor,
+    CycleCursorGrab,
+    PrintHelp,
+    DragWindow,
+    DragResizeWindow,
+    ShowWindowMenu,
+    #[cfg(macos_platform)]
+    CycleOptionAsAlt,
+    #[cfg(macos_platform)]
+    CreateNewTab,
+}
+
+impl Action {
+    fn help(&self) -> &'static str {
+        match self {
+            Action::CloseWindow => "Close window",
+            Action::ToggleCursorVisibility => "Hide cursor",
+            Action::CreateNewWindow => "Create new window",
+            Action::ToggleImeInput => "Toggle IME input",
+            Action::ToggleDecorations => "Toggle decorations",
+            Action::ToggleResizable => "Toggle window resizable state",
+            Action::ToggleFullscreen => "Toggle fullscreen",
+            Action::ToggleMaximize => "Maximize",
+            Action::Minimize => "Minimize",
+            Action::ToggleResizeIncrements => "Use resize increments when resizing window",
+            Action::NextCursor => "Advance the cursor to the next value",
+            Action::NextCustomCursor => "Advance custom cursor to the next value",
+            Action::CycleCursorGrab => "Cycle through cursor grab mode",
+            Action::PrintHelp => "Print help",
+            Action::DragWindow => "Start window drag",
+            Action::DragResizeWindow => "Start window drag-resize",
+            Action::ShowWindowMenu => "Show window menu",
+            #[cfg(macos_platform)]
+            Action::CycleOptionAsAlt => "Cycle option as alt mode",
+            #[cfg(macos_platform)]
+            Action::CreateNewTab => "Create new tab",
+        }
+    }
+}
+
+impl fmt::Display for Action {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        Debug::fmt(&self, f)
+    }
+}
+
+fn decode_cursor(bytes: &[u8]) -> CustomCursorSource {
+    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);
+    CustomCursor::from_rgba(samples.samples, w, h, w / 2, h / 2).unwrap()
+}
+
+fn load_icon(path: &Path) -> Icon {
+    let (icon_rgba, icon_width, icon_height) = {
+        let image = image::open(path)
+            .expect("Failed to open icon path")
+            .into_rgba8();
+        let (width, height) = image.dimensions();
+        let rgba = image.into_raw();
+        (rgba, width, height)
+    };
+    Icon::from_rgba(icon_rgba, icon_width, icon_height).expect("Failed to open icon")
+}
+
+fn modifiers_to_string(mods: ModifiersState) -> String {
+    let mut mods_line = String::new();
+    // Always add + since it's printed as a part of the bindings.
+    for (modifier, desc) in [
+        (ModifiersState::SUPER, "Super+"),
+        (ModifiersState::ALT, "Alt+"),
+        (ModifiersState::CONTROL, "Ctrl+"),
+        (ModifiersState::SHIFT, "Shift+"),
+    ] {
+        if !mods.contains(modifier) {
+            continue;
+        }
+
+        mods_line.push_str(desc);
+    }
+    mods_line
+}
+
+fn mouse_button_to_string(button: MouseButton) -> &'static str {
+    match button {
+        MouseButton::Left => "LMB",
+        MouseButton::Right => "RMB",
+        MouseButton::Middle => "MMB",
+        MouseButton::Back => "Back",
+        MouseButton::Forward => "Forward",
+        MouseButton::Other(_) => "",
+    }
+}
+
+/// Cursor list to cycle through.
+const CURSORS: &[CursorIcon] = &[
+    CursorIcon::Default,
+    CursorIcon::Crosshair,
+    CursorIcon::Pointer,
+    CursorIcon::Move,
+    CursorIcon::Text,
+    CursorIcon::Wait,
+    CursorIcon::Help,
+    CursorIcon::Progress,
+    CursorIcon::NotAllowed,
+    CursorIcon::ContextMenu,
+    CursorIcon::Cell,
+    CursorIcon::VerticalText,
+    CursorIcon::Alias,
+    CursorIcon::Copy,
+    CursorIcon::NoDrop,
+    CursorIcon::Grab,
+    CursorIcon::Grabbing,
+    CursorIcon::AllScroll,
+    CursorIcon::ZoomIn,
+    CursorIcon::ZoomOut,
+    CursorIcon::EResize,
+    CursorIcon::NResize,
+    CursorIcon::NeResize,
+    CursorIcon::NwResize,
+    CursorIcon::SResize,
+    CursorIcon::SeResize,
+    CursorIcon::SwResize,
+    CursorIcon::WResize,
+    CursorIcon::EwResize,
+    CursorIcon::NsResize,
+    CursorIcon::NeswResize,
+    CursorIcon::NwseResize,
+    CursorIcon::ColResize,
+    CursorIcon::RowResize,
+];
+
+const KEY_BINDINGS: &[Binding<&'static str>] = &[
+    Binding::new("Q", ModifiersState::CONTROL, Action::CloseWindow),
+    Binding::new("H", ModifiersState::CONTROL, Action::PrintHelp),
+    Binding::new("F", ModifiersState::CONTROL, Action::ToggleFullscreen),
+    Binding::new("D", ModifiersState::CONTROL, Action::ToggleDecorations),
+    Binding::new("I", ModifiersState::CONTROL, Action::ToggleImeInput),
+    Binding::new("L", ModifiersState::CONTROL, Action::CycleCursorGrab),
+    Binding::new("P", ModifiersState::CONTROL, Action::ToggleResizeIncrements),
+    Binding::new("R", ModifiersState::CONTROL, Action::ToggleResizable),
+    // M.
+    Binding::new("M", ModifiersState::CONTROL, Action::ToggleMaximize),
+    Binding::new("M", ModifiersState::ALT, Action::Minimize),
+    // N.
+    Binding::new("N", ModifiersState::CONTROL, Action::CreateNewWindow),
+    // C.
+    Binding::new("C", ModifiersState::CONTROL, Action::NextCursor),
+    Binding::new("C", ModifiersState::ALT, Action::NextCustomCursor),
+    Binding::new("Z", ModifiersState::CONTROL, Action::ToggleCursorVisibility),
+    #[cfg(macos_platform)]
+    Binding::new("T", ModifiersState::SUPER, Action::CreateNewTab),
+    #[cfg(macos_platform)]
+    Binding::new("O", ModifiersState::CONTROL, Action::CycleOptionAsAlt),
+];
+
+const MOUSE_BINDINGS: &[Binding<MouseButton>] = &[
+    Binding::new(
+        MouseButton::Left,
+        ModifiersState::ALT,
+        Action::DragResizeWindow,
+    ),
+    Binding::new(
+        MouseButton::Left,
+        ModifiersState::CONTROL,
+        Action::DragWindow,
+    ),
+    Binding::new(
+        MouseButton::Right,
+        ModifiersState::CONTROL,
+        Action::ShowWindowMenu,
+    ),
+];

examples/x11_embed.rs

@@ -0,0 +1,72 @@
+//! A demonstration of embedding a winit window in an existing X11 application.
+use std::error::Error;
+
+#[cfg(x11_platform)]
+fn main() -> Result<(), Box<dyn Error>> {
+    use winit::application::ApplicationHandler;
+    use winit::event::WindowEvent;
+    use winit::event_loop::{ActiveEventLoop, EventLoop};
+    use winit::platform::x11::WindowAttributesExtX11;
+    use winit::window::{Window, WindowId};
+
+    #[path = "util/fill.rs"]
+    mod fill;
+
+    pub struct XEmbedDemo {
+        parent_window_id: u32,
+        window: Option<Window>,
+    }
+
+    impl ApplicationHandler for XEmbedDemo {
+        fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+            let window_attributes = Window::default_attributes()
+                .with_title("An embedded window!")
+                .with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0))
+                .with_embed_parent_window(self.parent_window_id);
+
+            self.window = Some(event_loop.create_window(window_attributes).unwrap());
+        }
+
+        fn window_event(
+            &mut self,
+            event_loop: &ActiveEventLoop,
+            _window_id: WindowId,
+            event: WindowEvent,
+        ) {
+            let window = self.window.as_ref().unwrap();
+            match event {
+                WindowEvent::CloseRequested => event_loop.exit(),
+                WindowEvent::RedrawRequested => {
+                    window.pre_present_notify();
+                    fill::fill_window(window);
+                }
+                _ => (),
+            }
+        }
+
+        fn about_to_wait(&mut self, _event_loop: &ActiveEventLoop) {
+            self.window.as_ref().unwrap().request_redraw();
+        }
+    }
+
+    // First argument should be a 32-bit X11 window ID.
+    let parent_window_id = std::env::args()
+        .nth(1)
+        .ok_or("Expected a 32-bit X11 window ID as the first argument.")?
+        .parse::<u32>()?;
+
+    tracing_subscriber::fmt::init();
+    let event_loop = EventLoop::new()?;
+
+    let mut app = XEmbedDemo {
+        parent_window_id,
+        window: None,
+    };
+    event_loop.run_app(&mut app).map_err(Into::into)
+}
+
+#[cfg(not(x11_platform))]
+fn main() -> Result<(), Box<dyn Error>> {
+    println!("This example is only supported on X11 platforms.");
+    Ok(())
+}

run-wasm/Cargo.toml

@@ -1,7 +1,10 @@
 [package]
 name = "run-wasm"
 version = "0.1.0"
-edition = "2021"
+rust-version.workspace = true
+repository.workspace = true
+license.workspace = true
+edition.workspace = true
 publish = false
 
 [dependencies]

src/application.rs

@@ -0,0 +1,221 @@
+//! End user application handling.
+
+use crate::event::{DeviceEvent, DeviceId, StartCause, WindowEvent};
+use crate::event_loop::ActiveEventLoop;
+use crate::window::WindowId;
+
+/// The handler of the application events.
+pub trait ApplicationHandler<T: 'static = ()> {
+    /// Emitted when new events arrive from the OS to be processed.
+    ///
+    /// This is a useful place to put code that should be done before you start processing
+    /// events, such as updating frame timing information for benchmarking or checking the
+    /// [`StartCause`] to see if a timer set by
+    /// [`ControlFlow::WaitUntil`](crate::event_loop::ControlFlow::WaitUntil) has elapsed.
+    fn new_events(&mut self, event_loop: &ActiveEventLoop, cause: StartCause) {
+        let _ = (event_loop, cause);
+    }
+
+    /// Emitted when the application has been resumed.
+    ///
+    /// For consistency, all platforms emit a `Resumed` event even if they don't themselves have a
+    /// formal suspend/resume lifecycle. For systems without a formal suspend/resume lifecycle
+    /// the `Resumed` event is always emitted after the [`NewEvents(StartCause::Init)`][StartCause::Init]
+    /// event.
+    ///
+    /// # Portability
+    ///
+    /// It's recommended that applications should only initialize their graphics context and create
+    /// a window after they have received their first `Resumed` event. Some systems
+    /// (specifically Android) won't allow applications to create a render surface until they are
+    /// resumed.
+    ///
+    /// Considering that the implementation of [`Suspended`] and `Resumed` events may be internally
+    /// driven by multiple platform-specific events, and that there may be subtle differences across
+    /// platforms with how these internal events are delivered, it's recommended that applications
+    /// be able to gracefully handle redundant (i.e. back-to-back) [`Suspended`] or `Resumed` events.
+    ///
+    /// Also see [`Suspended`] notes.
+    ///
+    /// ## Android
+    ///
+    /// On Android, the `Resumed` event is sent when a new [`SurfaceView`] has been created. This is
+    /// expected to closely correlate with the [`onResume`] lifecycle event but there may technically
+    /// be a discrepancy.
+    ///
+    /// [`onResume`]: https://developer.android.com/reference/android/app/Activity#onResume()
+    ///
+    /// Applications that need to run on Android must wait until they have been `Resumed`
+    /// before they will be able to create a render surface (such as an `EGLSurface`,
+    /// [`VkSurfaceKHR`] or [`wgpu::Surface`]) which depend on having a
+    /// [`SurfaceView`]. Applications must also assume that if they are [`Suspended`], then their
+    /// render surfaces are invalid and should be dropped.
+    ///
+    /// Also see [`Suspended`] notes.
+    ///
+    /// [`SurfaceView`]: https://developer.android.com/reference/android/view/SurfaceView
+    /// [Activity lifecycle]: https://developer.android.com/guide/components/activities/activity-lifecycle
+    /// [`VkSurfaceKHR`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VkSurfaceKHR.html
+    /// [`wgpu::Surface`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html
+    ///
+    /// ## iOS
+    ///
+    /// On iOS, the `Resumed` event is emitted in response to an [`applicationDidBecomeActive`]
+    /// callback which means the application is "active" (according to the
+    /// [iOS application lifecycle]).
+    ///
+    /// [`applicationDidBecomeActive`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622956-applicationdidbecomeactive
+    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
+    ///
+    /// ## Web
+    ///
+    /// On Web, the `Resumed` event is emitted in response to a [`pageshow`] event
+    /// with the property [`persisted`] being true, which means that the page is being
+    /// restored from the [`bfcache`] (back/forward cache) - an in-memory cache that
+    /// stores a complete snapshot of a page (including the JavaScript heap) as the
+    /// user is navigating away.
+    ///
+    /// [`pageshow`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/pageshow_event
+    /// [`persisted`]: https://developer.mozilla.org/en-US/docs/Web/API/PageTransitionEvent/persisted
+    /// [`bfcache`]: https://web.dev/bfcache/
+    /// [`Suspended`]: Self::suspended
+    fn resumed(&mut self, event_loop: &ActiveEventLoop);
+
+    /// Emitted when an event is sent from [`EventLoopProxy::send_event`].
+    ///
+    /// [`EventLoopProxy::send_event`]: crate::event_loop::EventLoopProxy::send_event
+    fn user_event(&mut self, event_loop: &ActiveEventLoop, event: T) {
+        let _ = (event_loop, event);
+    }
+
+    /// Emitted when the OS sends an event to a winit window.
+    fn window_event(
+        &mut self,
+        event_loop: &ActiveEventLoop,
+        window_id: WindowId,
+        event: WindowEvent,
+    );
+
+    /// Emitted when the OS sends an event to a device.
+    fn device_event(
+        &mut self,
+        event_loop: &ActiveEventLoop,
+        device_id: DeviceId,
+        event: DeviceEvent,
+    ) {
+        let _ = (event_loop, device_id, event);
+    }
+
+    /// Emitted when the event loop is about to block and wait for new events.
+    ///
+    /// Most applications shouldn't need to hook into this event since there is no real relationship
+    /// between how often the event loop needs to wake up and the dispatching of any specific events.
+    ///
+    /// High frequency event sources, such as input devices could potentially lead to lots of wake
+    /// ups and also lots of corresponding `AboutToWait` events.
+    ///
+    /// This is not an ideal event to drive application rendering from and instead applications
+    /// should render in response to [`WindowEvent::RedrawRequested`] events.
+    fn about_to_wait(&mut self, event_loop: &ActiveEventLoop) {
+        let _ = event_loop;
+    }
+
+    /// Emitted when the application has been suspended.
+    ///
+    /// # Portability
+    ///
+    /// Not all platforms support the notion of suspending applications, and there may be no
+    /// technical way to guarantee being able to emit a `Suspended` event if the OS has
+    /// no formal application lifecycle (currently only Android, iOS, and Web do). For this reason,
+    /// Winit does not currently try to emit pseudo `Suspended` events before the application
+    /// quits on platforms without an application lifecycle.
+    ///
+    /// Considering that the implementation of `Suspended` and [`Resumed`] events may be internally
+    /// driven by multiple platform-specific events, and that there may be subtle differences across
+    /// platforms with how these internal events are delivered, it's recommended that applications
+    /// be able to gracefully handle redundant (i.e. back-to-back) `Suspended` or [`Resumed`] events.
+    ///
+    /// Also see [`Resumed`] notes.
+    ///
+    /// ## Android
+    ///
+    /// On Android, the `Suspended` event is only sent when the application's associated
+    /// [`SurfaceView`] is destroyed. This is expected to closely correlate with the [`onPause`]
+    /// lifecycle event but there may technically be a discrepancy.
+    ///
+    /// [`onPause`]: https://developer.android.com/reference/android/app/Activity#onPause()
+    ///
+    /// Applications that need to run on Android should assume their [`SurfaceView`] has been
+    /// destroyed, which indirectly invalidates any existing render surfaces that may have been
+    /// created outside of Winit (such as an `EGLSurface`, [`VkSurfaceKHR`] or [`wgpu::Surface`]).
+    ///
+    /// After being `Suspended` on Android applications must drop all render surfaces before
+    /// the event callback completes, which may be re-created when the application is next [`Resumed`].
+    ///
+    /// [`SurfaceView`]: https://developer.android.com/reference/android/view/SurfaceView
+    /// [Activity lifecycle]: https://developer.android.com/guide/components/activities/activity-lifecycle
+    /// [`VkSurfaceKHR`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VkSurfaceKHR.html
+    /// [`wgpu::Surface`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html
+    ///
+    /// ## iOS
+    ///
+    /// On iOS, the `Suspended` event is currently emitted in response to an
+    /// [`applicationWillResignActive`] callback which means that the application is
+    /// about to transition from the active to inactive state (according to the
+    /// [iOS application lifecycle]).
+    ///
+    /// [`applicationWillResignActive`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622950-applicationwillresignactive
+    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
+    ///
+    /// ## Web
+    ///
+    /// On Web, the `Suspended` event is emitted in response to a [`pagehide`] event
+    /// with the property [`persisted`] being true, which means that the page is being
+    /// put in the [`bfcache`] (back/forward cache) - an in-memory cache that stores a
+    /// complete snapshot of a page (including the JavaScript heap) as the user is
+    /// navigating away.
+    ///
+    /// [`pagehide`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/pagehide_event
+    /// [`persisted`]: https://developer.mozilla.org/en-US/docs/Web/API/PageTransitionEvent/persisted
+    /// [`bfcache`]: https://web.dev/bfcache/
+    /// [`Resumed`]: Self::resumed
+    fn suspended(&mut self, event_loop: &ActiveEventLoop) {
+        let _ = event_loop;
+    }
+
+    /// Emitted when the event loop is being shut down.
+    ///
+    /// This is irreversible - if this method is called, it is guaranteed that the event loop
+    /// will exist right after.
+    fn exiting(&mut self, event_loop: &ActiveEventLoop) {
+        let _ = event_loop;
+    }
+
+    /// Emitted when the application has received a memory warning.
+    ///
+    /// ## Platform-specific
+    ///
+    /// ### Android
+    ///
+    /// On Android, the `MemoryWarning` event is sent when [`onLowMemory`] was called. The application
+    /// must [release memory] or risk being killed.
+    ///
+    /// [`onLowMemory`]: https://developer.android.com/reference/android/app/Application.html#onLowMemory()
+    /// [release memory]: https://developer.android.com/topic/performance/memory#release
+    ///
+    /// ### iOS
+    ///
+    /// On iOS, the `MemoryWarning` event is emitted in response to an [`applicationDidReceiveMemoryWarning`]
+    /// callback. The application must free as much memory as possible or risk being terminated, see
+    /// [how to respond to memory warnings].
+    ///
+    /// [`applicationDidReceiveMemoryWarning`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1623063-applicationdidreceivememorywarni
+    /// [how to respond to memory warnings]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle/responding_to_memory_warnings
+    ///
+    /// ### Others
+    ///
+    /// - **macOS / Orbital / Wayland / Web / Windows:** Unsupported.
+    fn memory_warning(&mut self, event_loop: &ActiveEventLoop) {
+        let _ = event_loop;
+    }
+}

src/cursor.rs

@@ -5,8 +5,7 @@ use std::{error::Error, hash::Hash};
 
 use cursor_icon::CursorIcon;
 
-use crate::event_loop::EventLoopWindowTarget;
-use crate::platform_impl::{self, PlatformCustomCursor, PlatformCustomCursorBuilder};
+use crate::platform_impl::{PlatformCustomCursor, PlatformCustomCursorSource};
 
 /// The maximum width and height for a cursor when using [`CustomCursor::from_rgba`].
 pub const MAX_CURSOR_SIZE: u16 = 2048;
@@ -49,31 +48,28 @@ impl From<CustomCursor> for Cursor {
 /// # Example
 ///
 /// ```no_run
-/// use winit::{
-///     event::{Event, WindowEvent},
-///     event_loop::{ControlFlow, EventLoop},
-///     window::{CustomCursor, Window},
-/// };
-///
-/// let mut event_loop = EventLoop::new().unwrap();
+/// # use winit::event_loop::ActiveEventLoop;
+/// # use winit::window::Window;
+/// # fn scope(event_loop: &ActiveEventLoop, window: &Window) {
+/// use winit::window::CustomCursor;
 ///
 /// 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();
+/// let source = CustomCursor::from_rgba(rgba, w, h, w / 2, h / 2).unwrap();
 ///
 /// #[cfg(target_family = "wasm")]
-/// let builder = {
+/// let source = {
 ///     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 custom_cursor = event_loop.create_custom_cursor(source);
 ///
-/// let window = Window::new(&event_loop).unwrap();
 /// window.set_cursor(custom_cursor.clone());
+/// # }
 /// ```
 #[derive(Clone, Debug, Eq, Hash, PartialEq)]
 pub struct CustomCursor {
@@ -91,9 +87,18 @@ impl CustomCursor {
         height: u16,
         hotspot_x: u16,
         hotspot_y: u16,
-    ) -> Result<CustomCursorBuilder, BadImage> {
-        Ok(CustomCursorBuilder {
-            inner: PlatformCustomCursorBuilder::from_rgba(
+    ) -> Result<CustomCursorSource, BadImage> {
+        let _span = tracing::debug_span!(
+            "winit::Cursor::from_rgba",
+            width,
+            height,
+            hotspot_x,
+            hotspot_y
+        )
+        .entered();
+
+        Ok(CustomCursorSource {
+            inner: PlatformCustomCursorSource::from_rgba(
                 rgba.into(),
                 width,
                 height,
@@ -104,20 +109,12 @@ impl CustomCursor {
     }
 }
 
-/// Builds a [`CustomCursor`].
+/// Source for [`CustomCursor`].
 ///
 /// See [`CustomCursor`] for more details.
 #[derive(Debug)]
-pub struct CustomCursorBuilder {
-    pub(crate) inner: PlatformCustomCursorBuilder,
-}
-
-impl CustomCursorBuilder {
-    pub fn build(self, window_target: &EventLoopWindowTarget) -> CustomCursor {
-        CustomCursor {
-            inner: PlatformCustomCursor::build(self.inner, &window_target.p),
-        }
-    }
+pub struct CustomCursorSource {
+    pub(crate) inner: PlatformCustomCursorSource,
 }
 
 /// An error produced when using [`CustomCursor::from_rgba`] with invalid arguments.
@@ -178,12 +175,14 @@ impl fmt::Display for BadImage {
 
 impl Error for BadImage {}
 
-/// Platforms export this directly as `PlatformCustomCursorBuilder` if they need to only work with images.
+/// Platforms export this directly as `PlatformCustomCursorSource` if they need to only work with
+/// images.
+#[allow(dead_code)]
 #[derive(Debug)]
-pub(crate) struct OnlyCursorImageBuilder(pub(crate) CursorImage);
+pub(crate) struct OnlyCursorImageSource(pub(crate) CursorImage);
 
 #[allow(dead_code)]
-impl OnlyCursorImageBuilder {
+impl OnlyCursorImageSource {
     pub(crate) fn from_rgba(
         rgba: Vec<u8>,
         width: u16,
@@ -196,6 +195,7 @@ impl OnlyCursorImageBuilder {
 }
 
 /// Platforms export this directly as `PlatformCustomCursor` if they don't implement caching.
+#[allow(dead_code)]
 #[derive(Debug, Clone)]
 pub(crate) struct OnlyCursorImage(pub(crate) Arc<CursorImage>);
 
@@ -213,16 +213,6 @@ impl PartialEq for OnlyCursorImage {
 
 impl Eq for OnlyCursorImage {}
 
-#[allow(dead_code)]
-impl OnlyCursorImage {
-    pub(crate) fn build(
-        builder: OnlyCursorImageBuilder,
-        _: &platform_impl::EventLoopWindowTarget,
-    ) -> Self {
-        Self(Arc::new(builder.0))
-    }
-}
-
 #[derive(Debug)]
 #[allow(dead_code)]
 pub(crate) struct CursorImage {
@@ -297,8 +287,4 @@ impl NoCustomCursor {
         CursorImage::from_rgba(rgba, width, height, hotspot_x, hotspot_y)?;
         Ok(Self)
     }
-
-    fn build(self, _: &platform_impl::EventLoopWindowTarget) -> NoCustomCursor {
-        self
-    }
 }

src/error.rs

@@ -1,8 +1,6 @@
-use crate::platform_impl;
 use std::{error, fmt};
 
-#[doc(inline)]
-pub use winit_core::error::NotSupportedError;
+use crate::platform_impl;
 
 // TODO: Rename
 /// An error that may be generated when requesting Winit state
@@ -16,10 +14,10 @@ pub enum ExternalError {
     Os(OsError),
 }
 
-impl From<winit_core::event::InnerSizeIgnored> for ExternalError {
-    fn from(_: winit_core::event::InnerSizeIgnored) -> Self {
-        Self::Ignored
-    }
+/// The error type for when the requested operation is not supported by the backend.
+#[derive(Clone)]
+pub struct NotSupportedError {
+    _marker: (),
 }
 
 /// The error type for when the OS cannot perform the requested operation.
@@ -49,6 +47,14 @@ impl From<OsError> for EventLoopError {
     }
 }
 
+impl NotSupportedError {
+    #[inline]
+    #[allow(dead_code)]
+    pub(crate) fn new() -> NotSupportedError {
+        NotSupportedError { _marker: () }
+    }
+}
+
 impl OsError {
     #[allow(dead_code)]
     pub(crate) fn new(line: u32, file: &'static str, error: platform_impl::OsError) -> OsError {
@@ -82,6 +88,18 @@ impl fmt::Display for ExternalError {
     }
 }
 
+impl fmt::Debug for NotSupportedError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
+        f.debug_struct("NotSupportedError").finish()
+    }
+}
+
+impl fmt::Display for NotSupportedError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
+        f.pad("the requested operation is not supported by Winit")
+    }
+}
+
 impl fmt::Display for EventLoopError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
         match self {
@@ -95,6 +113,7 @@ impl fmt::Display for EventLoopError {
 
 impl error::Error for OsError {}
 impl error::Error for ExternalError {}
+impl error::Error for NotSupportedError {}
 impl error::Error for EventLoopError {}
 
 #[cfg(test)]
@@ -106,6 +125,11 @@ mod tests {
     // Eat attributes for testing
     #[test]
     fn ensure_fmt_does_not_panic() {
+        let _ = format!(
+            "{:?}, {}",
+            NotSupportedError::new(),
+            NotSupportedError::new().clone()
+        );
         let _ = format!(
             "{:?}, {}",
             ExternalError::NotSupported(NotSupportedError::new()),

src/event.rs

@@ -1,263 +1,120 @@
-//! Incoming notifications from the GUI system.
-
-use crate::dpi::{PhysicalPosition, PhysicalSize};
-use crate::event_loop::AsyncRequestSerial;
-use crate::keyboard::{self, ModifiersKeyState, ModifiersKeys, ModifiersState};
-use crate::window::{ActivationToken, Theme, WindowId};
-
-use std::fmt;
+//! The [`Event`] enum and assorted supporting types.
+//!
+//! These are sent to the closure given to [`EventLoop::run_app(...)`], where they get
+//! processed and used to modify the program state. For more details, see the root-level documentation.
+//!
+//! Some of these events represent different "parts" of a traditional event-handling loop. You could
+//! approximate the basic ordering loop of [`EventLoop::run_app(...)`] like this:
+//!
+//! ```rust,ignore
+//! let mut start_cause = StartCause::Init;
+//!
+//! while !elwt.exiting() {
+//!     app.new_events(event_loop, start_cause);
+//!
+//!     for event in (window events, user events, device events) {
+//!         // This will pick the right method on the application based on the event.
+//!         app.handle_event(event_loop, event);
+//!     }
+//!
+//!     for window_id in (redraw windows) {
+//!         app.window_event(event_loop, window_id, RedrawRequested);
+//!     }
+//!
+//!     app.about_to_wait(event_loop);
+//!     start_cause = wait_if_necessary();
+//! }
+//!
+//! app.exiting(event_loop);
+//! ```
+//!
+//! This leaves out timing details like [`ControlFlow::WaitUntil`] but hopefully
+//! describes what happens in what order.
+//!
+//! [`EventLoop::run_app(...)`]: crate::event_loop::EventLoop::run_app
+//! [`ControlFlow::WaitUntil`]: crate::event_loop::ControlFlow::WaitUntil
 use std::path::PathBuf;
 use std::sync::{Mutex, Weak};
-
 #[cfg(not(web_platform))]
 use std::time::Instant;
+
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+use smol_str::SmolStr;
 #[cfg(web_platform)]
 use web_time::Instant;
 
-#[cfg(feature = "serde")]
-pub use serde::{Deserialize, Serialize};
-
-use smol_str::SmolStr;
-
-/// Identifier of an input device.
-///
-/// Whenever you receive an event arising from a particular input device, this event contains a `DeviceId` which
-/// identifies its origin. Note that devices may be virtual (representing an on-screen cursor and keyboard focus) or
-/// physical. Virtual devices typically aggregate inputs from multiple physical devices.
-#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct DeviceId(u64);
-
-impl DeviceId {
-    /// Returns a dummy id, useful for unit testing.
-    ///
-    /// # Safety
-    ///
-    /// The only guarantee made about the return value of this function is that
-    /// it will always be equal to itself and to future values returned by this function.
-    /// No other guarantees are made. This may be equal to a real `DeviceId`.
-    ///
-    /// **Passing this into a winit function will result in undefined behavior.**
-    pub const unsafe fn dummy() -> Self {
-        DeviceId(0)
-    }
-}
-
-impl From<u64> for DeviceId {
-    fn from(value: u64) -> Self {
-        Self(value)
-    }
-}
-
-impl From<DeviceId> for u64 {
-    fn from(value: DeviceId) -> Self {
-        value.0
-    }
-}
+use crate::error::ExternalError;
+#[cfg(doc)]
+use crate::window::Window;
+use crate::{
+    dpi::{PhysicalPosition, PhysicalSize},
+    event_loop::AsyncRequestSerial,
+    keyboard::{self, ModifiersKeyState, ModifiersKeys, ModifiersState},
+    platform_impl,
+    window::{ActivationToken, Theme, WindowId},
+};
 
 /// Describes a generic event.
 ///
 /// See the module-level docs for more information on the event loop manages each event.
 #[derive(Debug, Clone, PartialEq)]
-pub enum Event<T: 'static, KeyExtra> {
-    /// Emitted when new events arrive from the OS to be processed.
+pub enum Event<T: 'static> {
+    /// See [`ApplicationHandler::new_events`] for details.
     ///
-    /// This event type is useful as a place to put code that should be done before you start
-    /// processing events, such as updating frame timing information for benchmarking or checking
-    /// the [`StartCause`] to see if a timer set by
-    /// [`ControlFlow::WaitUntil`](crate::event_loop::ControlFlow::WaitUntil) has elapsed.
+    /// [`ApplicationHandler::new_events`]: crate::application::ApplicationHandler::new_events
     NewEvents(StartCause),
 
-    /// Emitted when the OS sends an event to a winit window.
+    /// See [`ApplicationHandler::window_event`] for details.
+    ///
+    /// [`ApplicationHandler::window_event`]: crate::application::ApplicationHandler::window_event
     WindowEvent {
         window_id: WindowId,
-        event: WindowEvent<KeyExtra>,
+        event: WindowEvent,
     },
 
-    /// Emitted when the OS sends an event to a device.
+    /// See [`ApplicationHandler::device_event`] for details.
+    ///
+    /// [`ApplicationHandler::device_event`]: crate::application::ApplicationHandler::device_event
     DeviceEvent {
         device_id: DeviceId,
         event: DeviceEvent,
     },
 
-    /// Emitted when an event is sent from [`EventLoopProxy::send_event`](https://docs.rs/winit/latest/winit/event_loop/struct.EventLoopProxy.html#method.send_event)
+    /// See [`ApplicationHandler::user_event`] for details.
+    ///
+    /// [`ApplicationHandler::user_event`]: crate::application::ApplicationHandler::user_event
     UserEvent(T),
 
-    /// Emitted when the application has been suspended.
+    /// See [`ApplicationHandler::suspended`] for details.
     ///
-    /// # Portability
-    ///
-    /// Not all platforms support the notion of suspending applications, and there may be no
-    /// technical way to guarantee being able to emit a `Suspended` event if the OS has
-    /// no formal application lifecycle (currently only Android, iOS, and Web do). For this reason,
-    /// Winit does not currently try to emit pseudo `Suspended` events before the application
-    /// quits on platforms without an application lifecycle.
-    ///
-    /// Considering that the implementation of `Suspended` and [`Resumed`] events may be internally
-    /// driven by multiple platform-specific events, and that there may be subtle differences across
-    /// platforms with how these internal events are delivered, it's recommended that applications
-    /// be able to gracefully handle redundant (i.e. back-to-back) `Suspended` or [`Resumed`] events.
-    ///
-    /// Also see [`Resumed`] notes.
-    ///
-    /// ## Android
-    ///
-    /// On Android, the `Suspended` event is only sent when the application's associated
-    /// [`SurfaceView`] is destroyed. This is expected to closely correlate with the [`onPause`]
-    /// lifecycle event but there may technically be a discrepancy.
-    ///
-    /// [`onPause`]: https://developer.android.com/reference/android/app/Activity#onPause()
-    ///
-    /// Applications that need to run on Android should assume their [`SurfaceView`] has been
-    /// destroyed, which indirectly invalidates any existing render surfaces that may have been
-    /// created outside of Winit (such as an `EGLSurface`, [`VkSurfaceKHR`] or [`wgpu::Surface`]).
-    ///
-    /// After being `Suspended` on Android applications must drop all render surfaces before
-    /// the event callback completes, which may be re-created when the application is next [`Resumed`].
-    ///
-    /// [`SurfaceView`]: https://developer.android.com/reference/android/view/SurfaceView
-    /// [Activity lifecycle]: https://developer.android.com/guide/components/activities/activity-lifecycle
-    /// [`VkSurfaceKHR`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VkSurfaceKHR.html
-    /// [`wgpu::Surface`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html
-    ///
-    /// ## iOS
-    ///
-    /// On iOS, the `Suspended` event is currently emitted in response to an
-    /// [`applicationWillResignActive`] callback which means that the application is
-    /// about to transition from the active to inactive state (according to the
-    /// [iOS application lifecycle]).
-    ///
-    /// [`applicationWillResignActive`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622950-applicationwillresignactive
-    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
-    ///
-    /// ## Web
-    ///
-    /// On Web, the `Suspended` event is emitted in response to a [`pagehide`] event
-    /// with the property [`persisted`] being true, which means that the page is being
-    /// put in the [`bfcache`] (back/forward cache) - an in-memory cache that stores a
-    /// complete snapshot of a page (including the JavaScript heap) as the user is
-    /// navigating away.
-    ///
-    /// [`pagehide`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/pagehide_event
-    /// [`persisted`]: https://developer.mozilla.org/en-US/docs/Web/API/PageTransitionEvent/persisted
-    /// [`bfcache`]: https://web.dev/bfcache/
-    ///
-    /// [`Resumed`]: Self::Resumed
+    /// [`ApplicationHandler::suspended`]: crate::application::ApplicationHandler::suspended
     Suspended,
 
-    /// Emitted when the application has been resumed.
+    /// See [`ApplicationHandler::resumed`] for details.
     ///
-    /// For consistency, all platforms emit a `Resumed` event even if they don't themselves have a
-    /// formal suspend/resume lifecycle. For systems without a standard suspend/resume lifecycle
-    /// the `Resumed` event is always emitted after the [`NewEvents(StartCause::Init)`][StartCause::Init]
-    /// event.
-    ///
-    /// # Portability
-    ///
-    /// It's recommended that applications should only initialize their graphics context and create
-    /// a window after they have received their first `Resumed` event. Some systems
-    /// (specifically Android) won't allow applications to create a render surface until they are
-    /// resumed.
-    ///
-    /// Considering that the implementation of [`Suspended`] and `Resumed` events may be internally
-    /// driven by multiple platform-specific events, and that there may be subtle differences across
-    /// platforms with how these internal events are delivered, it's recommended that applications
-    /// be able to gracefully handle redundant (i.e. back-to-back) [`Suspended`] or `Resumed` events.
-    ///
-    /// Also see [`Suspended`] notes.
-    ///
-    /// ## Android
-    ///
-    /// On Android, the `Resumed` event is sent when a new [`SurfaceView`] has been created. This is
-    /// expected to closely correlate with the [`onResume`] lifecycle event but there may technically
-    /// be a discrepancy.
-    ///
-    /// [`onResume`]: https://developer.android.com/reference/android/app/Activity#onResume()
-    ///
-    /// Applications that need to run on Android must wait until they have been `Resumed`
-    /// before they will be able to create a render surface (such as an `EGLSurface`,
-    /// [`VkSurfaceKHR`] or [`wgpu::Surface`]) which depend on having a
-    /// [`SurfaceView`]. Applications must also assume that if they are [`Suspended`], then their
-    /// render surfaces are invalid and should be dropped.
-    ///
-    /// Also see [`Suspended`] notes.
-    ///
-    /// [`SurfaceView`]: https://developer.android.com/reference/android/view/SurfaceView
-    /// [Activity lifecycle]: https://developer.android.com/guide/components/activities/activity-lifecycle
-    /// [`VkSurfaceKHR`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VkSurfaceKHR.html
-    /// [`wgpu::Surface`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html
-    ///
-    /// ## iOS
-    ///
-    /// On iOS, the `Resumed` event is emitted in response to an [`applicationDidBecomeActive`]
-    /// callback which means the application is "active" (according to the
-    /// [iOS application lifecycle]).
-    ///
-    /// [`applicationDidBecomeActive`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622956-applicationdidbecomeactive
-    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
-    ///
-    /// ## Web
-    ///
-    /// On Web, the `Resumed` event is emitted in response to a [`pageshow`] event
-    /// with the property [`persisted`] being true, which means that the page is being
-    /// restored from the [`bfcache`] (back/forward cache) - an in-memory cache that
-    /// stores a complete snapshot of a page (including the JavaScript heap) as the
-    /// user is navigating away.
-    ///
-    /// [`pageshow`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/pageshow_event
-    /// [`persisted`]: https://developer.mozilla.org/en-US/docs/Web/API/PageTransitionEvent/persisted
-    /// [`bfcache`]: https://web.dev/bfcache/
-    ///
-    /// [`Suspended`]: Self::Suspended
+    /// [`ApplicationHandler::resumed`]: crate::application::ApplicationHandler::resumed
     Resumed,
 
-    /// Emitted when the event loop is about to block and wait for new events.
+    /// See [`ApplicationHandler::about_to_wait`] for details.
     ///
-    /// Most applications shouldn't need to hook into this event since there is no real relationship
-    /// between how often the event loop needs to wake up and the dispatching of any specific events.
-    ///
-    /// High frequency event sources, such as input devices could potentially lead to lots of wake
-    /// ups and also lots of corresponding `AboutToWait` events.
-    ///
-    /// This is not an ideal event to drive application rendering from and instead applications
-    /// should render in response to [`WindowEvent::RedrawRequested`] events.
+    /// [`ApplicationHandler::about_to_wait`]: crate::application::ApplicationHandler::about_to_wait
     AboutToWait,
 
-    /// Emitted when the event loop is being shut down.
+    /// See [`ApplicationHandler::exiting`] for details.
     ///
-    /// This is irreversible - if this event is emitted, it is guaranteed to be the last event that
-    /// gets emitted. You generally want to treat this as a "do on quit" event.
+    /// [`ApplicationHandler::exiting`]: crate::application::ApplicationHandler::exiting
     LoopExiting,
 
-    /// Emitted when the application has received a memory warning.
+    /// See [`ApplicationHandler::memory_warning`] for details.
     ///
-    /// ## Platform-specific
-    ///
-    /// ### Android
-    ///
-    /// On Android, the `MemoryWarning` event is sent when [`onLowMemory`] was called. The application
-    /// must [release memory] or risk being killed.
-    ///
-    /// [`onLowMemory`]: https://developer.android.com/reference/android/app/Application.html#onLowMemory()
-    /// [release memory]: https://developer.android.com/topic/performance/memory#release
-    ///
-    /// ### iOS
-    ///
-    /// On iOS, the `MemoryWarning` event is emitted in response to an [`applicationDidReceiveMemoryWarning`]
-    /// callback. The application must free as much memory as possible or risk being terminated, see
-    /// [how to respond to memory warnings].
-    ///
-    /// [`applicationDidReceiveMemoryWarning`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1623063-applicationdidreceivememorywarni
-    /// [how to respond to memory warnings]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle/responding_to_memory_warnings
-    ///
-    /// ### Others
-    ///
-    /// - **macOS / Wayland / Windows / Orbital:** Unsupported.
+    /// [`ApplicationHandler::memory_warning`]: crate::application::ApplicationHandler::memory_warning
     MemoryWarning,
 }
 
-impl<T, Extra> Event<T, Extra> {
+impl<T> Event<T> {
     #[allow(clippy::result_large_err)]
-    pub fn map_nonuser_event<U>(self) -> Result<Event<U, Extra>, Event<T, Extra>> {
+    pub fn map_nonuser_event<U>(self) -> Result<Event<U>, Event<T>> {
         use self::Event::*;
         match self {
             UserEvent(_) => Err(self),
@@ -304,14 +161,12 @@ pub enum StartCause {
 }
 
 /// Describes an event from a [`Window`].
-///
-/// [`Window`]: https://docs.rs/winit/latest/winit/window/struct.Window.html
 #[derive(Debug, Clone, PartialEq)]
-pub enum WindowEvent<KeyExtra> {
+pub enum WindowEvent {
     /// The activation token was delivered back and now could be used.
     ///
     #[cfg_attr(
-        not(any(x11_platform, wayland_platfrom)),
+        not(any(x11_platform, wayland_platform)),
         allow(rustdoc::broken_intra_doc_links)
     )]
     /// Delivered in response to [`request_activation_token`].
@@ -369,7 +224,7 @@ pub enum WindowEvent<KeyExtra> {
     ///   events which are not marked as `is_synthetic`.
     KeyboardInput {
         device_id: DeviceId,
-        event: KeyEvent<KeyExtra>,
+        event: KeyEvent,
 
         /// If `true`, the event was generated synthetically by winit
         /// in one of the following circumstances:
@@ -393,8 +248,6 @@ pub enum WindowEvent<KeyExtra> {
     /// ## Platform-specific
     ///
     /// - **iOS / Android / Web / Orbital:** Unsupported.
-    ///
-    /// [`Window::set_ime_allowed`]: https://docs.rs/winit/latest/winit/window/struct.Window.html#method.set_ime_allowed
     Ime(Ime),
 
     /// The cursor has moved on the window.
@@ -477,7 +330,7 @@ pub enum WindowEvent<KeyExtra> {
     /// The event is general enough that its generating gesture is allowed to vary
     /// across platforms. It could also be generated by another device.
     ///
-    /// Unfortunatly, neither [Windows](https://support.microsoft.com/en-us/windows/touch-gestures-for-windows-a9d28305-4818-a5df-4e2b-e5590f850741)
+    /// Unfortunately, neither [Windows](https://support.microsoft.com/en-us/windows/touch-gestures-for-windows-a9d28305-4818-a5df-4e2b-e5590f850741)
     /// nor [Wayland](https://wayland.freedesktop.org/libinput/doc/latest/gestures.html)
     /// support this gesture or any other gesture with the same effect.
     ///
@@ -540,11 +393,10 @@ pub enum WindowEvent<KeyExtra> {
     /// * Changing the display's scale factor (e.g. in Control Panel on Windows).
     /// * Moving the window to a display with a different scale factor.
     ///
-    /// After this event callback has been processed, the window will be resized to whatever value
-    /// is pointed to by the `new_inner_size` reference. By default, this will contain the size suggested
-    /// by the OS, but it can be changed to any value.
+    /// To update the window size, use the provided [`InnerSizeWriter`] handle. By default, the window is
+    /// resized to the value suggested by the OS, but it can be changed to any value.
     ///
-    /// For more information about DPI in general, see the [`dpi`](crate::dpi) module.
+    /// For more information about DPI in general, see the [`dpi`] crate.
     ScaleFactorChanged {
         scale_factor: f64,
         /// Handle to update inner size during scale changes.
@@ -600,11 +452,33 @@ pub enum WindowEvent<KeyExtra> {
     ///
     /// Winit will aggregate duplicate redraw requests into a single event, to
     /// help avoid duplicating rendering work.
-    ///
-    /// [`Window::request_redraw`]: https://docs.rs/winit/latest/winit/window/struct.Window.html#method.request_redraw
     RedrawRequested,
 }
 
+/// Identifier of an input device.
+///
+/// Whenever you receive an event arising from a particular input device, this event contains a `DeviceId` which
+/// identifies its origin. Note that devices may be virtual (representing an on-screen cursor and keyboard focus) or
+/// physical. Virtual devices typically aggregate inputs from multiple physical devices.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct DeviceId(pub(crate) platform_impl::DeviceId);
+
+impl DeviceId {
+    /// Returns a dummy id, useful for unit testing.
+    ///
+    /// # Safety
+    ///
+    /// The only guarantee made about the return value of this function is that
+    /// it will always be equal to itself and to future values returned by this function.
+    /// No other guarantees are made. This may be equal to a real `DeviceId`.
+    ///
+    /// **Passing this into a winit function will result in undefined behavior.**
+    pub const unsafe fn dummy() -> Self {
+        #[allow(unused_unsafe)]
+        DeviceId(unsafe { platform_impl::DeviceId::dummy() })
+    }
+}
+
 /// Represents raw hardware events that are not associated with any particular window.
 ///
 /// Useful for interactions that diverge significantly from a conventional 2D GUI, such as 3D camera or first-person
@@ -665,7 +539,7 @@ pub struct RawKeyEvent {
 
 /// Describes a keyboard input targeting a window.
 #[derive(Debug, Clone, Eq, PartialEq, Hash)]
-pub struct KeyEvent<Extra> {
+pub struct KeyEvent {
     /// Represents the position of a key independent of the currently active layout.
     ///
     /// It also uniquely identifies the physical key (i.e. it's mostly synonymous with a scancode).
@@ -715,7 +589,7 @@ pub struct KeyEvent<Extra> {
     /// - **Web:** Dead keys might be reported as the real key instead
     /// of `Dead` depending on the browser/OS.
     ///
-    /// [`key_without_modifiers`]: https://docs.rs/winit/latest/winit/platform/modifier_supplement/trait.KeyEventExtModifierSupplement.html#tymethod.key_without_modifiers
+    /// [`key_without_modifiers`]: crate::platform::modifier_supplement::KeyEventExtModifierSupplement::key_without_modifiers
     pub logical_key: keyboard::Key,
 
     /// Contains the text produced by this keypress.
@@ -764,6 +638,31 @@ pub struct KeyEvent<Extra> {
     /// On some systems, holding down a key for some period of time causes that key to be repeated
     /// as though it were being pressed and released repeatedly. This field is `true` if and only if
     /// this event is the result of one of those repeats.
+    ///
+    /// # Example
+    ///
+    /// In games, you often want to ignore repated key events - this can be
+    /// done by ignoring events where this property is set.
+    ///
+    /// ```
+    /// use winit::event::{WindowEvent, KeyEvent, ElementState};
+    /// use winit::keyboard::{KeyCode, PhysicalKey};
+    /// # let window_event = WindowEvent::RedrawRequested; // To make the example compile
+    /// match window_event {
+    ///     WindowEvent::KeyboardInput {
+    ///         event: KeyEvent {
+    ///             physical_key: PhysicalKey::Code(KeyCode::KeyW),
+    ///             state: ElementState::Pressed,
+    ///             repeat: false,
+    ///             ..
+    ///         },
+    ///         ..
+    ///     } => {
+    ///          // The physical key `W` was pressed, and it was not a repeat
+    ///     }
+    ///     _ => {} // Handle other events
+    /// }
+    /// ```
     pub repeat: bool,
 
     /// Platform-specific key event information.
@@ -772,7 +671,7 @@ pub struct KeyEvent<Extra> {
     /// modifiers applied.
     ///
     /// On Android, iOS, Redox and Web, this type is a no-op.
-    pub extra: Extra,
+    pub(crate) platform_specific: platform_impl::KeyEventExtra,
 }
 
 /// Describes keyboard modifiers event.
@@ -787,15 +686,6 @@ pub struct Modifiers {
 }
 
 impl Modifiers {
-    /// Only `winit` should instantiate this!
-    #[doc(hidden)]
-    pub fn new(state: ModifiersState, pressed_mods: ModifiersKeys) -> Self {
-        Self {
-            state,
-            pressed_mods,
-        }
-    }
-
     /// The state of the modifiers.
     pub fn state(&self) -> ModifiersState {
         self.state
@@ -895,8 +785,6 @@ impl From<ModifiersState> for Modifiers {
 /// Ime::Preedit("", None) // Synthetic event generated by winit to clear preedit.
 /// Ime::Commit("啊不")
 /// ```
-///
-/// [`Window::set_ime_cursor_area`]: https://docs.rs/winit/latest/winit/window/struct.Window.html#method.set_ime_cursor_area
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum Ime {
@@ -905,8 +793,6 @@ pub enum Ime {
     /// After getting this event you could receive [`Preedit`](Self::Preedit) and
     /// [`Commit`](Self::Commit) events. You should also start performing IME related requests
     /// like [`Window::set_ime_cursor_area`].
-    ///
-    /// [`Window::set_ime_cursor_area`]: https://docs.rs/winit/latest/winit/window/struct.Window.html#method.set_ime_cursor_area
     Enabled,
 
     /// Notifies when a new composing text should be set at the cursor position.
@@ -929,8 +815,6 @@ pub enum Ime {
     /// [`Commit`](Self::Commit) events until the next [`Enabled`](Self::Enabled) event. You should
     /// also stop issuing IME related requests like [`Window::set_ime_cursor_area`] and clear pending
     /// preedit text.
-    ///
-    /// [`Window::set_ime_cursor_area`]: https://docs.rs/winit/latest/winit/window/struct.Window.html#method.set_ime_cursor_area
     Disabled,
 }
 
@@ -1110,7 +994,7 @@ pub enum MouseScrollDelta {
     PixelDelta(PhysicalPosition<f64>),
 }
 
-/// Handle to synchroniously change the size of the window from the
+/// Handle to synchronously change the size of the window from the
 /// [`WindowEvent`].
 #[derive(Debug, Clone)]
 pub struct InnerSizeWriter {
@@ -1119,27 +1003,22 @@ pub struct InnerSizeWriter {
 
 impl InnerSizeWriter {
     #[cfg(not(orbital_platform))]
-    pub fn new(new_inner_size: Weak<Mutex<PhysicalSize<u32>>>) -> Self {
+    pub(crate) fn new(new_inner_size: Weak<Mutex<PhysicalSize<u32>>>) -> Self {
         Self { new_inner_size }
     }
 
-    /// Try to request inner size which will be set synchroniously on the window.
+    /// Try to request inner size which will be set synchronously on the window.
     pub fn request_inner_size(
         &mut self,
         new_inner_size: PhysicalSize<u32>,
-    ) -> Result<(), InnerSizeIgnored> {
+    ) -> Result<(), ExternalError> {
         if let Some(inner) = self.new_inner_size.upgrade() {
             *inner.lock().unwrap() = new_inner_size;
             Ok(())
         } else {
-            Err(InnerSizeIgnored { _private: () })
+            Err(ExternalError::Ignored)
         }
     }
-
-    /// Get the underlying size.
-    pub fn get(&self) -> PhysicalSize<u32> {
-        *self.new_inner_size.upgrade().unwrap().lock().unwrap()
-    }
 }
 
 impl PartialEq for InnerSizeWriter {
@@ -1148,25 +1027,6 @@ impl PartialEq for InnerSizeWriter {
     }
 }
 
-/// Could not write the inner size.
-pub struct InnerSizeIgnored {
-    _private: (),
-}
-
-impl fmt::Debug for InnerSizeIgnored {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("InnerSizeIgnored").finish_non_exhaustive()
-    }
-}
-
-impl fmt::Display for InnerSizeIgnored {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.write_str("tried to write inner size after")
-    }
-}
-
-impl std::error::Error for InnerSizeIgnored {}
-
 #[cfg(test)]
 mod tests {
     use crate::event;
@@ -1292,7 +1152,7 @@ mod tests {
     #[allow(clippy::redundant_clone)]
     #[test]
     fn test_event_clone() {
-        foreach_event!(|event: event::Event<(), ()>| {
+        foreach_event!(|event: event::Event<()>| {
             let event2 = event.clone();
             assert_eq!(event, event2);
         })
@@ -1300,7 +1160,7 @@ mod tests {
 
     #[test]
     fn test_map_nonuser_event() {
-        foreach_event!(|event: event::Event<(), ()>| {
+        foreach_event!(|event: event::Event<()>| {
             let is_user = matches!(event, event::Event::UserEvent(()));
             let event2 = event.map_nonuser_event::<()>();
             if is_user {
@@ -1334,7 +1194,7 @@ mod tests {
     #[allow(clippy::clone_on_copy)]
     #[test]
     fn ensure_attrs_do_not_panic() {
-        foreach_event!(|event: event::Event<(), ()>| {
+        foreach_event!(|event: event::Event<()>| {
             let _ = format!("{:?}", event);
         });
         let _ = event::StartCause::Init.clone();

src/event_loop.rs

@@ -8,17 +8,20 @@
 //! See the root-level documentation for information on how to create and use an event loop to
 //! handle events.
 use std::marker::PhantomData;
-use std::ops::Deref;
 #[cfg(any(x11_platform, wayland_platform))]
 use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, RawFd};
-use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
 use std::{error, fmt};
 
-use crate::error::EventLoopError;
-use crate::{event::Event, monitor::MonitorHandle, platform_impl};
+#[cfg(not(web_platform))]
+use std::time::{Duration, Instant};
+#[cfg(web_platform)]
+use web_time::{Duration, Instant};
 
-#[doc(inline)]
-pub use winit_core::event_loop::{AsyncRequestSerial, ControlFlow};
+use crate::application::ApplicationHandler;
+use crate::error::{EventLoopError, OsError};
+use crate::window::{CustomCursor, CustomCursorSource, Window, WindowAttributes};
+use crate::{event::Event, monitor::MonitorHandle, platform_impl};
 
 /// Provides a way to retrieve events from the system and from the windows that were registered to
 /// the events loop.
@@ -43,11 +46,9 @@ pub struct EventLoop<T: 'static> {
 /// Target that associates windows with an [`EventLoop`].
 ///
 /// This type exists to allow you to create new windows while Winit executes
-/// your callback. [`EventLoop`] will coerce into this type (`impl<T> Deref for
-/// EventLoop<T>`), so functions that take this as a parameter can also take
-/// `&EventLoop`.
-pub struct EventLoopWindowTarget {
-    pub(crate) p: platform_impl::EventLoopWindowTarget,
+/// your callback.
+pub struct ActiveEventLoop {
+    pub(crate) p: platform_impl::ActiveEventLoop,
     pub(crate) _marker: PhantomData<*mut ()>, // Not Send nor Sync
 }
 
@@ -109,6 +110,8 @@ impl<T> EventLoopBuilder<T> {
     )]
     #[inline]
     pub fn build(&mut self) -> Result<EventLoop<T>, EventLoopError> {
+        let _span = tracing::debug_span!("winit::EventLoopBuilder::build").entered();
+
         if EVENT_LOOP_CREATED.swap(true, Ordering::Relaxed) {
             return Err(EventLoopError::RecreationAttempt);
         }
@@ -133,9 +136,53 @@ impl<T> fmt::Debug for EventLoop<T> {
     }
 }
 
-impl fmt::Debug for EventLoopWindowTarget {
+impl fmt::Debug for ActiveEventLoop {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.pad("EventLoopWindowTarget { .. }")
+        f.pad("ActiveEventLoop { .. }")
+    }
+}
+
+/// Set through [`ActiveEventLoop::set_control_flow()`].
+///
+/// Indicates the desired behavior of the event loop after [`Event::AboutToWait`] is emitted.
+///
+/// Defaults to [`Wait`].
+///
+/// [`Wait`]: Self::Wait
+#[derive(Copy, Clone, Debug, Default, PartialEq, Eq)]
+pub enum ControlFlow {
+    /// When the current loop iteration finishes, immediately begin a new iteration regardless of
+    /// whether or not new events are available to process.
+    Poll,
+
+    /// When the current loop iteration finishes, suspend the thread until another event arrives.
+    #[default]
+    Wait,
+
+    /// When the current loop iteration finishes, suspend the thread until either another event
+    /// arrives or the given time is reached.
+    ///
+    /// Useful for implementing efficient timers. Applications which want to render at the display's
+    /// native refresh rate should instead use [`Poll`] and the VSync functionality of a graphics API
+    /// to reduce odds of missed frames.
+    ///
+    /// [`Poll`]: Self::Poll
+    WaitUntil(Instant),
+}
+
+impl ControlFlow {
+    /// Creates a [`ControlFlow`] that waits until a timeout has expired.
+    ///
+    /// In most cases, this is set to [`WaitUntil`]. However, if the timeout overflows, it is
+    /// instead set to [`Wait`].
+    ///
+    /// [`WaitUntil`]: Self::WaitUntil
+    /// [`Wait`]: Self::Wait
+    pub fn wait_duration(timeout: Duration) -> Self {
+        match Instant::now().checked_add(timeout) {
+            Some(instant) => Self::WaitUntil(instant),
+            None => Self::Wait,
+        }
     }
 }
 
@@ -169,8 +216,22 @@ impl<T> EventLoop<T> {
         }
     }
 
-    /// Runs the event loop in the calling thread and calls the given `event_handler` closure
-    /// to dispatch any pending events.
+    /// See [`run_app`].
+    ///
+    /// [`run_app`]: Self::run_app
+    #[inline]
+    #[deprecated = "use `EventLoop::run_app` instead"]
+    #[cfg(not(all(web_platform, target_feature = "exception-handling")))]
+    pub fn run<F>(self, event_handler: F) -> Result<(), EventLoopError>
+    where
+        F: FnMut(Event<T>, &ActiveEventLoop),
+    {
+        let _span = tracing::debug_span!("winit::EventLoop::run").entered();
+
+        self.event_loop.run(event_handler)
+    }
+
+    /// Run the application with the event loop on the calling thread.
     ///
     /// See the [`set_control_flow()`] docs on how to change the event loop's behavior.
     ///
@@ -185,40 +246,100 @@ impl<T> EventLoop<T> {
     ///   Web applications are recommended to use
     #[cfg_attr(
         web_platform,
-        doc = "[`EventLoopExtWebSys::spawn()`][crate::platform::web::EventLoopExtWebSys::spawn()]"
+        doc = "[`EventLoopExtWebSys::spawn_app()`][crate::platform::web::EventLoopExtWebSys::spawn_app()]"
     )]
     #[cfg_attr(not(web_platform), doc = "`EventLoopExtWebSys::spawn()`")]
-    ///   [^1] instead of [`run()`] to avoid the need
+    ///   [^1] instead of [`run_app()`] to avoid the need
     ///   for the Javascript exception trick, and to make it clearer that the event loop runs
     ///   asynchronously (via the browser's own, internal, event loop) and doesn't block the
     ///   current thread of execution like it does on other platforms.
     ///
     ///   This function won't be available with `target_feature = "exception-handling"`.
     ///
-    /// [`set_control_flow()`]: EventLoopWindowTarget::set_control_flow()
-    /// [`run()`]: Self::run()
-    /// [^1]: `EventLoopExtWebSys::spawn()` is only available on Web.
+    /// [`set_control_flow()`]: ActiveEventLoop::set_control_flow()
+    /// [`run_app()`]: Self::run_app()
+    /// [^1]: `EventLoopExtWebSys::spawn_app()` is only available on Web.
     #[inline]
     #[cfg(not(all(web_platform, target_feature = "exception-handling")))]
-    pub fn run<F>(self, event_handler: F) -> Result<(), EventLoopError>
-    where
-        F: FnMut(Event<T>, &EventLoopWindowTarget),
-    {
-        self.event_loop.run(event_handler)
+    pub fn run_app<A: ApplicationHandler<T>>(self, app: &mut A) -> Result<(), EventLoopError> {
+        self.event_loop
+            .run(|event, event_loop| dispatch_event_for_app(app, event_loop, event))
     }
 
-    /// Creates an [`EventLoopProxy`] that can be used to dispatch user events to the main event loop.
+    /// Creates an [`EventLoopProxy`] that can be used to dispatch user events
+    /// to the main event loop, possibly from another thread.
     pub fn create_proxy(&self) -> EventLoopProxy<T> {
         EventLoopProxy {
             event_loop_proxy: self.event_loop.create_proxy(),
         }
     }
+
+    /// Gets a persistent reference to the underlying platform display.
+    ///
+    /// See the [`OwnedDisplayHandle`] type for more information.
+    pub fn owned_display_handle(&self) -> OwnedDisplayHandle {
+        OwnedDisplayHandle {
+            platform: self.event_loop.window_target().p.owned_display_handle(),
+        }
+    }
+
+    /// Change if or when [`DeviceEvent`]s are captured.
+    ///
+    /// See [`ActiveEventLoop::listen_device_events`] for details.
+    ///
+    /// [`DeviceEvent`]: crate::event::DeviceEvent
+    pub fn listen_device_events(&self, allowed: DeviceEvents) {
+        let _span = tracing::debug_span!(
+            "winit::EventLoop::listen_device_events",
+            allowed = ?allowed
+        )
+        .entered();
+
+        self.event_loop
+            .window_target()
+            .p
+            .listen_device_events(allowed);
+    }
+
+    /// Sets the [`ControlFlow`].
+    pub fn set_control_flow(&self, control_flow: ControlFlow) {
+        self.event_loop
+            .window_target()
+            .p
+            .set_control_flow(control_flow)
+    }
+
+    /// Create a window.
+    ///
+    /// Creating window without event loop running often leads to improper window creation;
+    /// use [`ActiveEventLoop::create_window`] instead.
+    #[deprecated = "use `ActiveEventLoop::create_window` instead"]
+    #[inline]
+    pub fn create_window(&self, window_attributes: WindowAttributes) -> Result<Window, OsError> {
+        let _span = tracing::debug_span!(
+            "winit::EventLoop::create_window",
+            window_attributes = ?window_attributes
+        )
+        .entered();
+
+        let window =
+            platform_impl::Window::new(&self.event_loop.window_target().p, window_attributes)?;
+        Ok(Window { window })
+    }
+
+    /// Create custom cursor.
+    pub fn create_custom_cursor(&self, custom_cursor: CustomCursorSource) -> CustomCursor {
+        self.event_loop
+            .window_target()
+            .p
+            .create_custom_cursor(custom_cursor)
+    }
 }
 
 #[cfg(feature = "rwh_06")]
 impl<T> rwh_06::HasDisplayHandle for EventLoop<T> {
     fn display_handle(&self) -> Result<rwh_06::DisplayHandle<'_>, rwh_06::HandleError> {
-        rwh_06::HasDisplayHandle::display_handle(&**self)
+        rwh_06::HasDisplayHandle::display_handle(self.event_loop.window_target())
     }
 }
 
@@ -226,7 +347,7 @@ impl<T> rwh_06::HasDisplayHandle for EventLoop<T> {
 unsafe impl<T> rwh_05::HasRawDisplayHandle for EventLoop<T> {
     /// Returns a [`rwh_05::RawDisplayHandle`] for the event loop.
     fn raw_display_handle(&self) -> rwh_05::RawDisplayHandle {
-        rwh_05::HasRawDisplayHandle::raw_display_handle(&**self)
+        rwh_05::HasRawDisplayHandle::raw_display_handle(self.event_loop.window_target())
     }
 }
 
@@ -234,11 +355,11 @@ unsafe impl<T> rwh_05::HasRawDisplayHandle for EventLoop<T> {
 impl<T> AsFd for EventLoop<T> {
     /// Get the underlying [EventLoop]'s `fd` which you can register
     /// into other event loop, like [`calloop`] or [`mio`]. When doing so, the
-    /// loop must be polled with the [`pump_events`] API.
+    /// loop must be polled with the [`pump_app_events`] API.
     ///
     /// [`calloop`]: https://crates.io/crates/calloop
     /// [`mio`]: https://crates.io/crates/mio
-    /// [`pump_events`]: crate::platform::pump_events::EventLoopExtPumpEvents::pump_events
+    /// [`pump_app_events`]: crate::platform::pump_events::EventLoopExtPumpEvents::pump_app_events
     fn as_fd(&self) -> BorrowedFd<'_> {
         self.event_loop.as_fd()
     }
@@ -248,27 +369,49 @@ impl<T> AsFd for EventLoop<T> {
 impl<T> AsRawFd for EventLoop<T> {
     /// Get the underlying [EventLoop]'s raw `fd` which you can register
     /// into other event loop, like [`calloop`] or [`mio`]. When doing so, the
-    /// loop must be polled with the [`pump_events`] API.
+    /// loop must be polled with the [`pump_app_events`] API.
     ///
     /// [`calloop`]: https://crates.io/crates/calloop
     /// [`mio`]: https://crates.io/crates/mio
-    /// [`pump_events`]: crate::platform::pump_events::EventLoopExtPumpEvents::pump_events
+    /// [`pump_app_events`]: crate::platform::pump_events::EventLoopExtPumpEvents::pump_app_events
     fn as_raw_fd(&self) -> RawFd {
         self.event_loop.as_raw_fd()
     }
 }
 
-impl<T> Deref for EventLoop<T> {
-    type Target = EventLoopWindowTarget;
-    fn deref(&self) -> &EventLoopWindowTarget {
-        self.event_loop.window_target()
-    }
-}
+impl ActiveEventLoop {
+    /// Create the window.
+    ///
+    /// Possible causes of error include denied permission, incompatible system, and lack of memory.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **Web:** The window is created but not inserted into the web page automatically. Please
+    ///   see the web platform module for more information.
+    #[inline]
+    pub fn create_window(&self, window_attributes: WindowAttributes) -> Result<Window, OsError> {
+        let _span = tracing::debug_span!(
+            "winit::ActiveEventLoop::create_window",
+            window_attributes = ?window_attributes
+        )
+        .entered();
+
+        let window = platform_impl::Window::new(&self.p, window_attributes)?;
+        Ok(Window { window })
+    }
+
+    /// Create custom cursor.
+    pub fn create_custom_cursor(&self, custom_cursor: CustomCursorSource) -> CustomCursor {
+        let _span = tracing::debug_span!("winit::ActiveEventLoop::create_custom_cursor",).entered();
+
+        self.p.create_custom_cursor(custom_cursor)
+    }
 
-impl EventLoopWindowTarget {
     /// Returns the list of all the monitors available on the system.
     #[inline]
     pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle> {
+        let _span = tracing::debug_span!("winit::ActiveEventLoop::available_monitors",).entered();
+
         #[allow(clippy::useless_conversion)] // false positive on some platforms
         self.p
             .available_monitors()
@@ -285,6 +428,8 @@ impl EventLoopWindowTarget {
     /// **Wayland / Web:** Always returns `None`.
     #[inline]
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
+        let _span = tracing::debug_span!("winit::ActiveEventLoop::primary_monitor",).entered();
+
         self.p
             .primary_monitor()
             .map(|inner| MonitorHandle { inner })
@@ -302,6 +447,12 @@ impl EventLoopWindowTarget {
     ///
     /// [`DeviceEvent`]: crate::event::DeviceEvent
     pub fn listen_device_events(&self, allowed: DeviceEvents) {
+        let _span = tracing::debug_span!(
+            "winit::ActiveEventLoop::listen_device_events",
+            allowed = ?allowed
+        )
+        .entered();
+
         self.p.listen_device_events(allowed);
     }
 
@@ -319,6 +470,8 @@ impl EventLoopWindowTarget {
     ///
     /// See [`LoopExiting`](Event::LoopExiting).
     pub fn exit(&self) {
+        let _span = tracing::debug_span!("winit::ActiveEventLoop::exit",).entered();
+
         self.p.exit()
     }
 
@@ -340,7 +493,7 @@ impl EventLoopWindowTarget {
 }
 
 #[cfg(feature = "rwh_06")]
-impl rwh_06::HasDisplayHandle for EventLoopWindowTarget {
+impl rwh_06::HasDisplayHandle for ActiveEventLoop {
     fn display_handle(&self) -> Result<rwh_06::DisplayHandle<'_>, rwh_06::HandleError> {
         let raw = self.p.raw_display_handle_rwh_06()?;
         // SAFETY: The display will never be deallocated while the event loop is alive.
@@ -349,7 +502,7 @@ impl rwh_06::HasDisplayHandle for EventLoopWindowTarget {
 }
 
 #[cfg(feature = "rwh_05")]
-unsafe impl rwh_05::HasRawDisplayHandle for EventLoopWindowTarget {
+unsafe impl rwh_05::HasRawDisplayHandle for ActiveEventLoop {
     /// Returns a [`rwh_05::RawDisplayHandle`] for the event loop.
     fn raw_display_handle(&self) -> rwh_05::RawDisplayHandle {
         self.p.raw_display_handle_rwh_05()
@@ -360,7 +513,7 @@ unsafe impl rwh_05::HasRawDisplayHandle for EventLoopWindowTarget {
 ///
 /// The purpose of this type is to provide a cheaply clonable handle to the underlying
 /// display handle. This is often used by graphics APIs to connect to the underlying APIs.
-/// It is difficult to keep a handle to the [`EventLoop`] type or the [`EventLoopWindowTarget`]
+/// It is difficult to keep a handle to the [`EventLoop`] type or the [`ActiveEventLoop`]
 /// type. In contrast, this type involves no lifetimes and can be persisted for as long as
 /// needed.
 ///
@@ -424,6 +577,8 @@ impl<T: 'static> EventLoopProxy<T> {
     ///
     /// [`UserEvent(event)`]: Event::UserEvent
     pub fn send_event(&self, event: T) -> Result<(), EventLoopClosed<T>> {
+        let _span = tracing::debug_span!("winit::EventLoopProxy::send_event",).entered();
+
         self.event_loop_proxy.send_event(event)
     }
 }
@@ -460,3 +615,49 @@ pub enum DeviceEvents {
     /// Never capture device events.
     Never,
 }
+
+/// A unique identifier of the winit's async request.
+///
+/// This could be used to identify the async request once it's done
+/// and a specific action must be taken.
+///
+/// One of the handling scenarios could be to maintain a working list
+/// containing [`AsyncRequestSerial`] and some closure associated with it.
+/// Then once event is arriving the working list is being traversed and a job
+/// executed and removed from the list.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct AsyncRequestSerial {
+    serial: usize,
+}
+
+impl AsyncRequestSerial {
+    // TODO(kchibisov): Remove `cfg` when the clipboard will be added.
+    #[allow(dead_code)]
+    pub(crate) fn get() -> Self {
+        static CURRENT_SERIAL: AtomicUsize = AtomicUsize::new(0);
+        // NOTE: We rely on wrap around here, while the user may just request
+        // in the loop usize::MAX times that's issue is considered on them.
+        let serial = CURRENT_SERIAL.fetch_add(1, Ordering::Relaxed);
+        Self { serial }
+    }
+}
+
+/// Shim for various run APIs.
+#[inline(always)]
+pub(crate) fn dispatch_event_for_app<T: 'static, A: ApplicationHandler<T>>(
+    app: &mut A,
+    event_loop: &ActiveEventLoop,
+    event: Event<T>,
+) {
+    match event {
+        Event::NewEvents(cause) => app.new_events(event_loop, cause),
+        Event::WindowEvent { window_id, event } => app.window_event(event_loop, window_id, event),
+        Event::DeviceEvent { device_id, event } => app.device_event(event_loop, device_id, event),
+        Event::UserEvent(event) => app.user_event(event_loop, event),
+        Event::Suspended => app.suspended(event_loop),
+        Event::Resumed => app.resumed(event_loop),
+        Event::AboutToWait => app.about_to_wait(event_loop),
+        Event::LoopExiting => app.exiting(event_loop),
+        Event::MemoryWarning => app.memory_warning(event_loop),
+    }
+}

src/icon.rs

@@ -118,6 +118,8 @@ impl Icon {
     /// The length of `rgba` must be divisible by 4, and `width * height` must equal
     /// `rgba.len() / 4`. Otherwise, this will return a `BadIcon` error.
     pub fn from_rgba(rgba: Vec<u8>, width: u32, height: u32) -> Result<Self, BadIcon> {
+        let _span = tracing::debug_span!("winit::Icon::from_rgba", width, height).entered();
+
         Ok(Icon {
             inner: PlatformIcon::from_rgba(rgba, width, height)?,
         })

src/keyboard.rs

@@ -20,7 +20,7 @@
 // the W3C short notice apply to the `Key` and `KeyCode` enums and their variants and the
 // documentation attached to their variants.
 
-// --------- BEGGINING OF W3C LICENSE --------------------------------------------------------------
+// --------- BEGINNING OF W3C LICENSE --------------------------------------------------------------
 //
 // License
 //
@@ -55,7 +55,7 @@
 //
 // --------- END OF W3C LICENSE --------------------------------------------------------------------
 
-// --------- BEGGINING OF W3C SHORT NOTICE ---------------------------------------------------------
+// --------- BEGINNING OF W3C SHORT NOTICE ---------------------------------------------------------
 //
 // winit: https://github.com/rust-windowing/winit
 //
@@ -744,7 +744,7 @@ pub enum KeyCode {
 /// - The `Super` variant here, is named `Meta` in the aforementioned specification. (There's
 ///   another key which the specification calls `Super`. That does not exist here.)
 /// - The `Space` variant here, can be identified by the character it generates in the
-///   specificaiton.
+///   specification.
 ///
 /// [`KeyboardEvent.key`]: https://w3c.github.io/uievents-key/
 #[non_exhaustive]
@@ -914,7 +914,7 @@ pub enum NamedKey {
     Standby,
     /// The WakeUp key. (`KEYCODE_WAKEUP`)
     WakeUp,
-    /// Initate the multi-candidate mode.
+    /// Initiate the multi-candidate mode.
     AllCandidates,
     Alphanumeric,
     /// Initiate the Code Input mode to allow characters to be entered by
@@ -1454,35 +1454,12 @@ pub enum NamedKey {
     F35,
 }
 
-// NOTE: the exact modifier key is not used to represent modifiers state in the
-// first place due to a fact that modifiers state could be changed without any
-// key being pressed and on some platforms like Wayland/X11 which key resulted
-// in modifiers change is hidden, also, not that it really matters.
-//
-// The reason this API is even exposed is mostly to provide a way for users
-// to treat modifiers differently based on their position, which is required
-// on macOS due to their AltGr/Option situation.
-bitflags! {
-    #[doc(hidden)]
-    #[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Hash)]
-    pub struct ModifiersKeys: u8 {
-        const LSHIFT   = 0b0000_0001;
-        const RSHIFT   = 0b0000_0010;
-        const LCONTROL = 0b0000_0100;
-        const RCONTROL = 0b0000_1000;
-        const LALT     = 0b0001_0000;
-        const RALT     = 0b0010_0000;
-        const LSUPER   = 0b0100_0000;
-        const RSUPER   = 0b1000_0000;
-    }
-}
-
 /// Key represents the meaning of a keypress.
 ///
 /// This is a superset of the UI Events Specification's [`KeyboardEvent.key`] with
 /// additions:
 /// - All simple variants are wrapped under the `Named` variant
-/// - The `Unidentified` variant here, can still identifiy a key through it's `NativeKeyCode`.
+/// - The `Unidentified` variant here, can still identify a key through it's `NativeKeyCode`.
 /// - The `Dead` variant here, can specify the character which is inserted when pressing the
 ///   dead-key twice.
 ///
@@ -1588,7 +1565,7 @@ impl NamedKey {
     /// # Examples
     ///
     /// ```
-    /// use winit_core::keyboard::NamedKey;
+    /// use winit::keyboard::NamedKey;
     ///
     /// assert_eq!(NamedKey::Enter.to_text(), Some("\r"));
     /// assert_eq!(NamedKey::F20.to_text(), None);
@@ -1611,7 +1588,7 @@ impl Key {
     /// # Examples
     ///
     /// ```
-    /// use winit_core::keyboard::{NamedKey, Key};
+    /// use winit::keyboard::{NamedKey, Key};
     ///
     /// assert_eq!(Key::Character("a".into()).to_text(), Some("a"));
     /// assert_eq!(Key::Named(NamedKey::Enter).to_text(), Some("\r"));
@@ -1750,6 +1727,28 @@ pub enum ModifiersKeyState {
     Unknown,
 }
 
+// NOTE: the exact modifier key is not used to represent modifiers state in the
+// first place due to a fact that modifiers state could be changed without any
+// key being pressed and on some platforms like Wayland/X11 which key resulted
+// in modifiers change is hidden, also, not that it really matters.
+//
+// The reason this API is even exposed is mostly to provide a way for users
+// to treat modifiers differently based on their position, which is required
+// on macOS due to their AltGr/Option situation.
+bitflags! {
+    #[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Hash)]
+    pub(crate) struct ModifiersKeys: u8 {
+        const LSHIFT   = 0b0000_0001;
+        const RSHIFT   = 0b0000_0010;
+        const LCONTROL = 0b0000_0100;
+        const RCONTROL = 0b0000_1000;
+        const LALT     = 0b0001_0000;
+        const RALT     = 0b0010_0000;
+        const LSUPER   = 0b0100_0000;
+        const RSUPER   = 0b1000_0000;
+    }
+}
+
 #[cfg(feature = "serde")]
 mod modifiers_serde {
     use super::ModifiersState;

src/lib.rs

@@ -0,0 +1,217 @@
+//! Winit is a cross-platform window creation and event loop management library.
+//!
+//! # Building windows
+//!
+//! Before you can create a [`Window`], you first need to build an [`EventLoop`]. This is done with
+//! the [`EventLoop::new()`] function.
+//!
+//! ```no_run
+//! use winit::event_loop::EventLoop;
+//! let event_loop = EventLoop::new().unwrap();
+//! ```
+//!
+//! Then you create a [`Window`] with [`create_window`].
+//!
+//! # Event handling
+//!
+//! Once a [`Window`] has been created, it will generate different *events*. A [`Window`] object can
+//! generate [`WindowEvent`]s when certain input events occur, such as a cursor moving over the
+//! window or a key getting pressed while the window is focused. Devices can generate
+//! [`DeviceEvent`]s, which contain unfiltered event data that isn't specific to a certain window.
+//! Some user activity, like mouse movement, can generate both a [`WindowEvent`] *and* a
+//! [`DeviceEvent`]. You can also create and handle your own custom [`Event::UserEvent`]s, if desired.
+//!
+//! You can retrieve events by calling [`EventLoop::run_app()`]. This function will
+//! dispatch events for every [`Window`] that was created with that particular [`EventLoop`], and
+//! will run until [`exit()`] is used, at which point [`Event::LoopExiting`].
+//!
+//! Winit no longer uses a `EventLoop::poll_events() -> impl Iterator<Event>`-based event loop
+//! model, since that can't be implemented properly on some platforms (e.g web, iOS) and works poorly on
+//! most other platforms. However, this model can be re-implemented to an extent with
+#![cfg_attr(
+    any(
+        windows_platform,
+        macos_platform,
+        android_platform,
+        x11_platform,
+        wayland_platform
+    ),
+    doc = "[`EventLoopExtPumpEvents::pump_app_events()`][platform::pump_events::EventLoopExtPumpEvents::pump_app_events()]"
+)]
+#![cfg_attr(
+    not(any(
+        windows_platform,
+        macos_platform,
+        android_platform,
+        x11_platform,
+        wayland_platform
+    )),
+    doc = "`EventLoopExtPumpEvents::pump_app_events()`"
+)]
+//! [^1]. See that method's documentation for more reasons about why
+//! it's discouraged beyond compatibility reasons.
+//!
+//!
+//! ```no_run
+//! use winit::application::ApplicationHandler;
+//! use winit::event::WindowEvent;
+//! use winit::event_loop::{ActiveEventLoop, ControlFlow, EventLoop};
+//! use winit::window::{Window, WindowId};
+//!
+//! #[derive(Default)]
+//! struct App {
+//!     window: Option<Window>,
+//! }
+//!
+//! impl ApplicationHandler for App {
+//!     fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+//!         self.window = Some(event_loop.create_window(Window::default_attributes()).unwrap());
+//!     }
+//!
+//!     fn window_event(&mut self, event_loop: &ActiveEventLoop, id: WindowId, event: WindowEvent) {
+//!         match event {
+//!             WindowEvent::CloseRequested => {
+//!                 println!("The close button was pressed; stopping");
+//!                 event_loop.exit();
+//!             },
+//!             WindowEvent::RedrawRequested => {
+//!                 // Redraw the application.
+//!                 //
+//!                 // It's preferable for applications that do not render continuously to render in
+//!                 // this event rather than in AboutToWait, since rendering in here allows
+//!                 // the program to gracefully handle redraws requested by the OS.
+//!
+//!                 // Draw.
+//!
+//!                 // Queue a RedrawRequested event.
+//!                 //
+//!                 // You only need to call this if you've determined that you need to redraw in
+//!                 // applications which do not always need to. Applications that redraw continuously
+//!                 // can render here instead.
+//!                 self.window.as_ref().unwrap().request_redraw();
+//!             }
+//!             _ => (),
+//!         }
+//!     }
+//! }
+//!
+//! let event_loop = EventLoop::new().unwrap();
+//!
+//! // ControlFlow::Poll continuously runs the event loop, even if the OS hasn't
+//! // dispatched any events. This is ideal for games and similar applications.
+//! event_loop.set_control_flow(ControlFlow::Poll);
+//!
+//! // ControlFlow::Wait pauses the event loop if no events are available to process.
+//! // This is ideal for non-game applications that only update in response to user
+//! // input, and uses significantly less power/CPU time than ControlFlow::Poll.
+//! event_loop.set_control_flow(ControlFlow::Wait);
+//!
+//! let mut app = App::default();
+//! event_loop.run_app(&mut app);
+//! ```
+//!
+//! [`WindowEvent`] has a [`WindowId`] member. In multi-window environments, it should be
+//! compared to the value returned by [`Window::id()`] to determine which [`Window`]
+//! dispatched the event.
+//!
+//! # Drawing on the window
+//!
+//! Winit doesn't directly provide any methods for drawing on a [`Window`]. However, it allows you to
+//! retrieve the raw handle of the window and display (see the [`platform`] module and/or the
+//! [`raw_window_handle`] and [`raw_display_handle`] methods), which in turn allows
+//! you to create an OpenGL/Vulkan/DirectX/Metal/etc. context that can be used to render graphics.
+//!
+//! Note that many platforms will display garbage data in the window's client area if the
+//! application doesn't render anything to the window by the time the desktop compositor is ready to
+//! display the window to the user. If you notice this happening, you should create the window with
+//! [`visible` set to `false`](crate::window::WindowAttributes::with_visible) and explicitly make the
+//! window visible only once you're ready to render into it.
+//!
+//! # UI scaling
+//!
+//! UI scaling is important, go read the docs for the [`dpi`] crate for an
+//! introduction.
+//!
+//! All of Winit's functions return physical types, but can take either logical or physical
+//! coordinates as input, allowing you to use the most convenient coordinate system for your
+//! particular application.
+//!
+//! Winit will dispatch a [`ScaleFactorChanged`] event whenever a window's scale factor has changed.
+//! This can happen if the user drags their window from a standard-resolution monitor to a high-DPI
+//! monitor or if the user changes their DPI settings. This allows you to rescale your application's
+//! UI elements and adjust how the platform changes the window's size to reflect the new scale
+//! factor. If a window hasn't received a [`ScaleFactorChanged`] event, its scale factor
+//! can be found by calling [`window.scale_factor()`].
+//!
+//! [`ScaleFactorChanged`]: event::WindowEvent::ScaleFactorChanged
+//! [`window.scale_factor()`]: window::Window::scale_factor
+//!
+//! # Cargo Features
+//!
+//! Winit provides the following Cargo features:
+//!
+//! * `x11` (enabled by default): On Unix platforms, enables the X11 backend.
+//! * `wayland` (enabled by default): On Unix platforms, enables the Wayland
+//!   backend.
+//! * `rwh_04`: Implement `raw-window-handle v0.4` traits.
+//! * `rwh_05`: Implement `raw-window-handle v0.5` traits.
+//! * `rwh_06`: Implement `raw-window-handle v0.6` traits.
+//! * `serde`: Enables serialization/deserialization of certain types with
+//!   [Serde](https://crates.io/crates/serde).
+//! * `mint`: Enables mint (math interoperability standard types) conversions.
+//!
+//! See the [`platform`] module for documentation on platform-specific cargo
+//! features.
+//!
+//! [`EventLoop`]: event_loop::EventLoop
+//! [`EventLoop::new()`]: event_loop::EventLoop::new
+//! [`EventLoop::run_app()`]: event_loop::EventLoop::run_app
+//! [`exit()`]: event_loop::ActiveEventLoop::exit
+//! [`Window`]: window::Window
+//! [`WindowId`]: window::WindowId
+//! [`WindowAttributes`]: window::WindowAttributes
+//! [window_new]: window::Window::new
+//! [`create_window`]: event_loop::ActiveEventLoop::create_window
+//! [`Window::id()`]: window::Window::id
+//! [`WindowEvent`]: event::WindowEvent
+//! [`DeviceEvent`]: event::DeviceEvent
+//! [`Event::UserEvent`]: event::Event::UserEvent
+//! [`Event::LoopExiting`]: event::Event::LoopExiting
+//! [`raw_window_handle`]: ./window/struct.Window.html#method.raw_window_handle
+//! [`raw_display_handle`]: ./window/struct.Window.html#method.raw_display_handle
+//! [^1]: `EventLoopExtPumpEvents::pump_app_events()` is only available on Windows, macOS, Android, X11 and Wayland.
+
+#![deny(rust_2018_idioms)]
+#![deny(rustdoc::broken_intra_doc_links)]
+#![deny(clippy::all)]
+#![deny(unsafe_op_in_unsafe_fn)]
+#![cfg_attr(clippy, deny(warnings))]
+// Doc feature labels can be tested locally by running RUSTDOCFLAGS="--cfg=docsrs" cargo +nightly doc
+#![cfg_attr(
+    docsrs,
+    feature(doc_auto_cfg, doc_cfg_hide),
+    doc(cfg_hide(doc, docsrs))
+)]
+#![allow(clippy::missing_safety_doc)]
+
+#[cfg(feature = "rwh_06")]
+pub use rwh_06 as raw_window_handle;
+
+// Re-export DPI types so that users don't have to put it in Cargo.toml.
+#[doc(inline)]
+pub use dpi;
+
+pub mod application;
+#[macro_use]
+pub mod error;
+mod cursor;
+pub mod event;
+pub mod event_loop;
+mod icon;
+pub mod keyboard;
+pub mod monitor;
+mod platform_impl;
+mod utils;
+pub mod window;
+
+pub mod platform;

src/monitor.rs

@@ -3,7 +3,7 @@
 //! If you want to get basic information about a monitor, you can use the
 //! [`MonitorHandle`] type. This is retrieved from one of the following
 //! methods, which return an iterator of [`MonitorHandle`]:
-//! - [`EventLoopWindowTarget::available_monitors`](crate::event_loop::EventLoopWindowTarget::available_monitors).
+//! - [`ActiveEventLoop::available_monitors`](crate::event_loop::ActiveEventLoop::available_monitors).
 //! - [`Window::available_monitors`](crate::window::Window::available_monitors).
 use crate::{
     dpi::{PhysicalPosition, PhysicalSize},
@@ -145,7 +145,7 @@ impl MonitorHandle {
     /// Returns the scale factor of the underlying monitor. To map logical pixels to physical
     /// pixels and vice versa, use [`Window::scale_factor`].
     ///
-    /// See the [`dpi`](crate::dpi) module for more information.
+    /// See the [`dpi`] module for more information.
     ///
     /// ## Platform-specific
     ///

src/platform/android.rs

@@ -0,0 +1,170 @@
+//! # Android
+//!
+//! The Android backend builds on (and exposes types from) the [`ndk`](https://docs.rs/ndk/) crate.
+//!
+//! Native Android applications need some form of "glue" crate that is responsible
+//! for defining the main entry point for your Rust application as well as tracking
+//! various life-cycle events and synchronizing with the main JVM thread.
+//!
+//! Winit uses the [android-activity](https://docs.rs/android-activity/) as a
+//! glue crate (prior to `0.28` it used
+//! [ndk-glue](https://github.com/rust-windowing/android-ndk-rs/tree/master/ndk-glue)).
+//!
+//! The version of the glue crate that your application depends on _must_ match the
+//! version that Winit depends on because the glue crate is responsible for your
+//! application's main entry point. If Cargo resolves multiple versions, they will
+//! clash.
+//!
+//! `winit` glue compatibility table:
+//!
+//! | winit |       ndk-glue               |
+//! | :---: | :--------------------------: |
+//! | 0.29  | `android-activity = "0.5"`   |
+//! | 0.28  | `android-activity = "0.4"`   |
+//! | 0.27  | `ndk-glue = "0.7"`           |
+//! | 0.26  | `ndk-glue = "0.5"`           |
+//! | 0.25  | `ndk-glue = "0.3"`           |
+//! | 0.24  | `ndk-glue = "0.2"`           |
+//!
+//! The recommended way to avoid a conflict with the glue version is to avoid explicitly
+//! depending on the `android-activity` crate, and instead consume the API that
+//! is re-exported by Winit under `winit::platform::android::activity::*`
+//!
+//! Running on an Android device needs a dynamic system library. Add this to Cargo.toml:
+//!
+//! ```toml
+//! [lib]
+//! name = "main"
+//! crate-type = ["cdylib"]
+//! ```
+//!
+//! All Android applications are based on an `Activity` subclass, and the
+//! `android-activity` crate is designed to support different choices for this base
+//! class. Your application _must_ specify the base class it needs via a feature flag:
+//!
+//! | Base Class       | Feature Flag      |  Notes  |
+//! | :--------------: | :---------------: | :-----: |
+//! | `NativeActivity` | `android-native-activity` | Built-in to Android - it is possible to use without compiling any Java or Kotlin code. Java or Kotlin code may be needed to subclass `NativeActivity` to access some platform features. It does not derive from the [`AndroidAppCompat`] base class.|
+//! | [`GameActivity`] | `android-game-activity`   | Derives from [`AndroidAppCompat`], a defacto standard `Activity` base class that helps support a wider range of Android versions. Requires a build system that can compile Java or Kotlin and fetch Android dependencies from a [Maven repository][agdk_jetpack] (or link with an embedded [release][agdk_releases] of [`GameActivity`]) |
+//!
+//! [`GameActivity`]: https://developer.android.com/games/agdk/game-activity
+//! [`GameTextInput`]: https://developer.android.com/games/agdk/add-support-for-text-input
+//! [`AndroidAppCompat`]: https://developer.android.com/reference/androidx/appcompat/app/AppCompatActivity
+//! [agdk_jetpack]: https://developer.android.com/jetpack/androidx/releases/games
+//! [agdk_releases]: https://developer.android.com/games/agdk/download#agdk-libraries
+//! [Gradle]: https://developer.android.com/studio/build
+//!
+//! For more details, refer to these `android-activity` [example applications](https://github.com/rust-mobile/android-activity/tree/main/examples).
+//!
+//! ## Converting from `ndk-glue` to `android-activity`
+//!
+//! 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 = "0.29.15", 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).
+
+use crate::{
+    event_loop::{ActiveEventLoop, EventLoop, EventLoopBuilder},
+    window::{Window, WindowAttributes},
+};
+
+use self::activity::{AndroidApp, ConfigurationRef, Rect};
+
+/// Additional methods on [`EventLoop`] that are specific to Android.
+pub trait EventLoopExtAndroid {}
+
+impl<T> EventLoopExtAndroid for EventLoop<T> {}
+
+/// Additional methods on [`ActiveEventLoop`] that are specific to Android.
+pub trait ActiveEventLoopExtAndroid {}
+
+/// Additional methods on [`Window`] that are specific to Android.
+pub trait WindowExtAndroid {
+    fn content_rect(&self) -> Rect;
+
+    fn config(&self) -> ConfigurationRef;
+}
+
+impl WindowExtAndroid for Window {
+    fn content_rect(&self) -> Rect {
+        self.window.content_rect()
+    }
+
+    fn config(&self) -> ConfigurationRef {
+        self.window.config()
+    }
+}
+
+impl ActiveEventLoopExtAndroid for ActiveEventLoop {}
+
+/// Additional methods on [`WindowAttributes`] that are specific to Android.
+pub trait WindowAttributesExtAndroid {}
+
+impl WindowAttributesExtAndroid for WindowAttributes {}
+
+pub trait EventLoopBuilderExtAndroid {
+    /// Associates the `AndroidApp` that was passed to `android_main()` with the event loop
+    ///
+    /// This must be called on Android since the `AndroidApp` is not global state.
+    fn with_android_app(&mut self, app: AndroidApp) -> &mut Self;
+
+    /// Calling this will mark the volume keys to be manually handled by the application
+    ///
+    /// Default is to let the operating system handle the volume keys
+    fn handle_volume_keys(&mut self) -> &mut Self;
+}
+
+impl<T> EventLoopBuilderExtAndroid for EventLoopBuilder<T> {
+    fn with_android_app(&mut self, app: AndroidApp) -> &mut Self {
+        self.platform_specific.android_app = Some(app);
+        self
+    }
+
+    fn handle_volume_keys(&mut self) -> &mut Self {
+        self.platform_specific.ignore_volume_keys = false;
+        self
+    }
+}
+
+/// Re-export of the `android_activity` API
+///
+/// Winit re-exports the `android_activity` API for convenience so that most
+/// applications can rely on the Winit crate to resolve the required version of
+/// `android_activity` and avoid any chance of a conflict between Winit and the
+/// application crate.
+///
+/// Unlike most libraries there can only be a single implementation
+/// of the `android_activity` glue crate linked with an application because
+/// it is responsible for the application's `android_main()` entry point.
+///
+/// Since Winit depends on a specific version of `android_activity` the simplest
+/// way to avoid creating a conflict is for applications to avoid explicitly
+/// depending on the `android_activity` crate, and instead consume the API that
+/// is re-exported by Winit.
+///
+/// For compatibility applications should then import the `AndroidApp` type for
+/// their `android_main(app: AndroidApp)` function like:
+/// ```rust
+/// #[cfg(target_os="android")]
+/// use winit::platform::android::activity::AndroidApp;
+/// ```
+pub mod activity {
+    // We enable the `"native-activity"` feature just so that we can build the
+    // docs, but it'll be very confusing for users to see the docs with that
+    // feature enabled, so we avoid inlining it so that they're forced to view
+    // it on the crate's own docs.rs page.
+    #[doc(no_inline)]
+    #[cfg(android_platform)]
+    pub use android_activity::*;
+
+    #[cfg(not(android_platform))]
+    #[doc(hidden)]
+    pub struct Rect;
+    #[cfg(not(android_platform))]
+    #[doc(hidden)]
+    pub struct ConfigurationRef;
+    #[cfg(not(android_platform))]
+    #[doc(hidden)]
+    pub struct AndroidApp;
+}

src/platform/ios.rs

@@ -1,9 +1,75 @@
+//! # iOS / UIKit
+//!
+//! Winit has an OS requirement of iOS 8 or higher, and is regularly tested on
+//! iOS 9.3.
+//!
+//! iOS's main `UIApplicationMain` does some init work that's required by all
+//! UI-related code (see issue [#1705]). It is best to create your windows
+//! inside `Event::Resumed`.
+//!
+//! [#1705]: https://github.com/rust-windowing/winit/issues/1705
+//!
+//! ## Building app
+//!
+//! To build ios app you will need rustc built for this targets:
+//!
+//!  - armv7-apple-ios
+//!  - armv7s-apple-ios
+//!  - i386-apple-ios
+//!  - aarch64-apple-ios
+//!  - x86_64-apple-ios
+//!
+//! Then
+//!
+//! ```
+//! cargo build --target=...
+//! ```
+//! The simplest way to integrate your app into xcode environment is to build it
+//! as a static library. Wrap your main function and export it.
+//!
+//! ```rust, ignore
+//! #[no_mangle]
+//! pub extern fn start_winit_app() {
+//!     start_inner()
+//! }
+//!
+//! fn start_inner() {
+//!    ...
+//! }
+//! ```
+//!
+//! Compile project and then drag resulting .a into Xcode project. Add winit.h to xcode.
+//!
+//! ```ignore
+//! void start_winit_app();
+//! ```
+//!
+//! Use start_winit_app inside your xcode's main function.
+//!
+//!
+//! ## App lifecycle and events
+//!
+//! iOS environment is very different from other platforms and you must be very
+//! careful with it's events. Familiarize yourself with
+//! [app lifecycle](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/).
+//!
+//! This is how those event are represented in winit:
+//!
+//!  - applicationDidBecomeActive is Resumed
+//!  - applicationWillResignActive is Suspended
+//!  - applicationWillTerminate is LoopExiting
+//!
+//! Keep in mind that after LoopExiting event is received every attempt to draw with
+//! opengl will result in segfault.
+//!
+//! Also note that app may not receive the LoopExiting event if suspended; it might be SIGKILL'ed.
+
 use std::os::raw::c_void;
 
 use crate::{
     event_loop::EventLoop,
     monitor::{MonitorHandle, VideoModeHandle},
-    window::{Window, WindowBuilder},
+    window::{Window, WindowAttributes},
 };
 
 /// Additional methods on [`EventLoop`] that are specific to iOS.
@@ -159,8 +225,8 @@ impl WindowExtIOS for Window {
     }
 }
 
-/// Additional methods on [`WindowBuilder`] that are specific to iOS.
-pub trait WindowBuilderExtIOS {
+/// Additional methods on [`WindowAttributes`] that are specific to iOS.
+pub trait WindowAttributesExtIOS {
     /// Sets the [`contentScaleFactor`] of the underlying [`UIWindow`] to `scale_factor`.
     ///
     /// The default value is device dependent, and it's recommended GLES or Metal applications set
@@ -214,42 +280,41 @@ pub trait WindowBuilderExtIOS {
     fn with_preferred_status_bar_style(self, status_bar_style: StatusBarStyle) -> Self;
 }
 
-impl WindowBuilderExtIOS for WindowBuilder {
+impl WindowAttributesExtIOS for WindowAttributes {
     #[inline]
     fn with_scale_factor(mut self, scale_factor: f64) -> Self {
-        self.window.platform_specific.scale_factor = Some(scale_factor);
+        self.platform_specific.scale_factor = Some(scale_factor);
         self
     }
 
     #[inline]
     fn with_valid_orientations(mut self, valid_orientations: ValidOrientations) -> Self {
-        self.window.platform_specific.valid_orientations = valid_orientations;
+        self.platform_specific.valid_orientations = valid_orientations;
         self
     }
 
     #[inline]
     fn with_prefers_home_indicator_hidden(mut self, hidden: bool) -> Self {
-        self.window.platform_specific.prefers_home_indicator_hidden = hidden;
+        self.platform_specific.prefers_home_indicator_hidden = hidden;
         self
     }
 
     #[inline]
     fn with_preferred_screen_edges_deferring_system_gestures(mut self, edges: ScreenEdge) -> Self {
-        self.window
-            .platform_specific
+        self.platform_specific
             .preferred_screen_edges_deferring_system_gestures = edges;
         self
     }
 
     #[inline]
     fn with_prefers_status_bar_hidden(mut self, hidden: bool) -> Self {
-        self.window.platform_specific.prefers_status_bar_hidden = hidden;
+        self.platform_specific.prefers_status_bar_hidden = hidden;
         self
     }
 
     #[inline]
     fn with_preferred_status_bar_style(mut self, status_bar_style: StatusBarStyle) -> Self {
-        self.window.platform_specific.preferred_status_bar_style = status_bar_style;
+        self.platform_specific.preferred_status_bar_style = status_bar_style;
         self
     }
 }

src/platform/macos.rs

@@ -1,12 +1,28 @@
+//! # macOS / AppKit
+//!
+//! Winit has an OS requirement of macOS 10.11 or higher (same as Rust
+//! itself), and is regularly tested on macOS 10.14.
+//!
+//! A lot of functionality expects the application to be ready before you
+//! start doing anything; this includes creating windows, fetching monitors,
+//! drawing, and so on, see issues [#2238], [#2051] and [#2087].
+//!
+//! If you encounter problems, you should try doing your initialization inside
+//! `Event::Resumed`.
+//!
+//! [#2238]: https://github.com/rust-windowing/winit/issues/2238
+//! [#2051]: https://github.com/rust-windowing/winit/issues/2051
+//! [#2087]: https://github.com/rust-windowing/winit/issues/2087
+
 use std::os::raw::c_void;
 
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
 use crate::{
-    event_loop::{EventLoopBuilder, EventLoopWindowTarget},
+    event_loop::{ActiveEventLoop, EventLoopBuilder},
     monitor::MonitorHandle,
-    window::{Window, WindowBuilder},
+    window::{Window, WindowAttributes},
 };
 
 /// Additional methods on [`Window`] that are specific to MacOS.
@@ -174,15 +190,15 @@ pub enum ActivationPolicy {
     Prohibited,
 }
 
-/// Additional methods on [`WindowBuilder`] that are specific to MacOS.
+/// Additional methods on [`WindowAttributes`] that are specific to MacOS.
 ///
-/// **Note:** Properties dealing with the titlebar will be overwritten by the [`WindowBuilder::with_decorations`] method:
+/// **Note:** Properties dealing with the titlebar will be overwritten by the [`WindowAttributes::with_decorations`] method:
 /// - `with_titlebar_transparent`
 /// - `with_title_hidden`
 /// - `with_titlebar_hidden`
 /// - `with_titlebar_buttons_hidden`
 /// - `with_fullsize_content_view`
-pub trait WindowBuilderExtMacOS {
+pub trait WindowAttributesExtMacOS {
     /// Enables click-and-drag behavior for the entire window, not just the titlebar.
     fn with_movable_by_window_background(self, movable_by_window_background: bool) -> Self;
     /// Makes the titlebar transparent and allows the content to appear behind it.
@@ -209,65 +225,64 @@ pub trait WindowBuilderExtMacOS {
     fn with_option_as_alt(self, option_as_alt: OptionAsAlt) -> Self;
 }
 
-impl WindowBuilderExtMacOS for WindowBuilder {
+impl WindowAttributesExtMacOS for WindowAttributes {
     #[inline]
     fn with_movable_by_window_background(mut self, movable_by_window_background: bool) -> Self {
-        self.window.platform_specific.movable_by_window_background = movable_by_window_background;
+        self.platform_specific.movable_by_window_background = movable_by_window_background;
         self
     }
 
     #[inline]
     fn with_titlebar_transparent(mut self, titlebar_transparent: bool) -> Self {
-        self.window.platform_specific.titlebar_transparent = titlebar_transparent;
+        self.platform_specific.titlebar_transparent = titlebar_transparent;
         self
     }
 
     #[inline]
     fn with_titlebar_hidden(mut self, titlebar_hidden: bool) -> Self {
-        self.window.platform_specific.titlebar_hidden = titlebar_hidden;
+        self.platform_specific.titlebar_hidden = titlebar_hidden;
         self
     }
 
     #[inline]
     fn with_titlebar_buttons_hidden(mut self, titlebar_buttons_hidden: bool) -> Self {
-        self.window.platform_specific.titlebar_buttons_hidden = titlebar_buttons_hidden;
+        self.platform_specific.titlebar_buttons_hidden = titlebar_buttons_hidden;
         self
     }
 
     #[inline]
     fn with_title_hidden(mut self, title_hidden: bool) -> Self {
-        self.window.platform_specific.title_hidden = title_hidden;
+        self.platform_specific.title_hidden = title_hidden;
         self
     }
 
     #[inline]
     fn with_fullsize_content_view(mut self, fullsize_content_view: bool) -> Self {
-        self.window.platform_specific.fullsize_content_view = fullsize_content_view;
+        self.platform_specific.fullsize_content_view = fullsize_content_view;
         self
     }
 
     #[inline]
     fn with_disallow_hidpi(mut self, disallow_hidpi: bool) -> Self {
-        self.window.platform_specific.disallow_hidpi = disallow_hidpi;
+        self.platform_specific.disallow_hidpi = disallow_hidpi;
         self
     }
 
     #[inline]
     fn with_has_shadow(mut self, has_shadow: bool) -> Self {
-        self.window.platform_specific.has_shadow = has_shadow;
+        self.platform_specific.has_shadow = has_shadow;
         self
     }
 
     #[inline]
     fn with_accepts_first_mouse(mut self, accepts_first_mouse: bool) -> Self {
-        self.window.platform_specific.accepts_first_mouse = accepts_first_mouse;
+        self.platform_specific.accepts_first_mouse = accepts_first_mouse;
         self
     }
 
     #[inline]
     fn with_tabbing_identifier(mut self, tabbing_identifier: &str) -> Self {
-        self.window
-            .platform_specific
+        self.platform_specific
             .tabbing_identifier
             .replace(tabbing_identifier.to_string());
         self
@@ -275,7 +290,7 @@ impl WindowBuilderExtMacOS for WindowBuilder {
 
     #[inline]
     fn with_option_as_alt(mut self, option_as_alt: OptionAsAlt) -> Self {
-        self.window.platform_specific.option_as_alt = option_as_alt;
+        self.platform_specific.option_as_alt = option_as_alt;
         self
     }
 }
@@ -375,8 +390,8 @@ impl MonitorHandleExtMacOS for MonitorHandle {
     }
 }
 
-/// Additional methods on [`EventLoopWindowTarget`] that are specific to macOS.
-pub trait EventLoopWindowTargetExtMacOS {
+/// Additional methods on [`ActiveEventLoop`] that are specific to macOS.
+pub trait ActiveEventLoopExtMacOS {
     /// Hide the entire application. In most applications this is typically triggered with Command-H.
     fn hide_application(&self);
     /// Hide the other applications. In most applications this is typically triggered with Command+Option-H.
@@ -389,7 +404,7 @@ pub trait EventLoopWindowTargetExtMacOS {
     fn allows_automatic_window_tabbing(&self) -> bool;
 }
 
-impl EventLoopWindowTargetExtMacOS for EventLoopWindowTarget {
+impl ActiveEventLoopExtMacOS for ActiveEventLoop {
     fn hide_application(&self) {
         self.p.hide_application()
     }

src/platform/mod.rs

@@ -46,6 +46,7 @@ pub mod pump_events;
     macos_platform,
     x11_platform,
     wayland_platform,
+    orbital_platform,
     docsrs
 ))]
 pub mod modifier_supplement;

src/platform/modifier_supplement.rs

@@ -25,8 +25,7 @@ pub trait KeyEventExtModifierSupplement {
 impl KeyEventExtModifierSupplement for KeyEvent {
     #[inline]
     fn text_with_all_modifiers(&self) -> Option<&str> {
-        self.extra
-            .extra
+        self.platform_specific
             .text_with_all_modifiers
             .as_ref()
             .map(|s| s.as_str())
@@ -34,6 +33,6 @@ impl KeyEventExtModifierSupplement for KeyEvent {
 
     #[inline]
     fn key_without_modifiers(&self) -> Key {
-        self.extra.extra.key_without_modifiers.clone()
+        self.platform_specific.key_without_modifiers.clone()
     }
 }

src/platform/orbital.rs

@@ -0,0 +1,6 @@
+//! # Orbital / Redox OS
+//!
+//! Redox OS has some functionality not yet present that will be implemented
+//! when its orbital display server provides it.
+
+// There are no Orbital specific traits yet.

src/platform/pump_events.rs

@@ -1,22 +1,13 @@
 use std::time::Duration;
 
-use crate::{
-    event::Event,
-    event_loop::{EventLoop, EventLoopWindowTarget},
-};
-
-/// The return status for `pump_events`
-pub enum PumpStatus {
-    /// Continue running external loop.
-    Continue,
-    /// Exit external loop.
-    Exit(i32),
-}
+use crate::application::ApplicationHandler;
+use crate::event::Event;
+use crate::event_loop::{self, ActiveEventLoop, EventLoop};
 
 /// Additional methods on [`EventLoop`] for pumping events within an external event loop
 pub trait EventLoopExtPumpEvents {
     /// A type provided by the user that can be passed through [`Event::UserEvent`].
-    type UserEvent;
+    type UserEvent: 'static;
 
     /// Pump the `EventLoop` to check for and dispatch pending events.
     ///
@@ -32,68 +23,6 @@ pub trait EventLoopExtPumpEvents {
     /// Passing a `timeout` of `None` means that it may wait indefinitely for new
     /// events before returning control back to the external loop.
     ///
-    /// ## Example
-    ///
-    /// ```rust,no_run
-    /// # // Copied from examples/window_pump_events.rs
-    /// # #[cfg(any(
-    /// #     windows_platform,
-    /// #     macos_platform,
-    /// #     x11_platform,
-    /// #     wayland_platform,
-    /// #     android_platform,
-    /// # ))]
-    /// fn main() -> std::process::ExitCode {
-    /// #     use std::{process::ExitCode, thread::sleep, time::Duration};
-    /// #
-    /// #     use simple_logger::SimpleLogger;
-    /// #     use winit::{
-    /// #         event::{Event, WindowEvent},
-    /// #         event_loop::EventLoop,
-    /// #         platform::pump_events::{EventLoopExtPumpEvents, PumpStatus},
-    /// #         window::Window,
-    /// #     };
-    ///     let mut event_loop = EventLoop::new().unwrap();
-    /// #
-    /// #   SimpleLogger::new().init().unwrap();
-    ///     let window = Window::builder()
-    ///         .with_title("A fantastic window!")
-    ///         .build(&event_loop)
-    ///         .unwrap();
-    ///
-    ///     'main: loop {
-    ///         let timeout = Some(Duration::ZERO);
-    ///         let status = event_loop.pump_events(timeout, |event, elwt| {
-    /// #            if let Event::WindowEvent { event, .. } = &event {
-    /// #                // Print only Window events to reduce noise
-    /// #                println!("{event:?}");
-    /// #            }
-    /// #
-    ///             match event {
-    ///                 Event::WindowEvent {
-    ///                     event: WindowEvent::CloseRequested,
-    ///                     window_id,
-    ///                 } if window_id == window.id() => elwt.exit(),
-    ///                 Event::AboutToWait => {
-    ///                     window.request_redraw();
-    ///                 }
-    ///                 _ => (),
-    ///             }
-    ///         });
-    ///         if let PumpStatus::Exit(exit_code) = status {
-    ///             break 'main ExitCode::from(exit_code as u8);
-    ///         }
-    ///
-    ///         // Sleep for 1/60 second to simulate application work
-    ///         //
-    ///         // Since `pump_events` doesn't block it will be important to
-    ///         // throttle the loop in the app somehow.
-    ///         println!("Update()");
-    ///         sleep(Duration::from_millis(16));
-    ///     }
-    /// }
-    /// ```
-    ///
     /// **Note:** This is not a portable API, and its usage involves a number of
     /// caveats and trade offs that should be considered before using this API!
     ///
@@ -137,12 +66,14 @@ pub trait EventLoopExtPumpEvents {
     /// other lifecycle events occur while the event is buffered.
     ///
     /// ## Supported Platforms
+    ///
     /// - Windows
     /// - Linux
     /// - MacOS
     /// - Android
     ///
     /// ## Unsupported Platforms
+    ///
     /// - **Web:**  This API is fundamentally incompatible with the event-based way in which
     /// Web browsers work because it's not possible to have a long-running external
     /// loop that would block the browser and there is nothing that can be
@@ -152,6 +83,7 @@ pub trait EventLoopExtPumpEvents {
     /// there's no way to support the same approach to polling as on MacOS.
     ///
     /// ## Platform-specific
+    ///
     /// - **Windows**: The implementation will use `PeekMessage` when checking for
     ///   window messages to avoid blocking your external event loop.
     ///
@@ -172,9 +104,24 @@ pub trait EventLoopExtPumpEvents {
     ///   If you render outside of Winit you are likely to see window resizing artifacts
     ///   since MacOS expects applications to render synchronously during any `drawRect`
     ///   callback.
+    fn pump_app_events<A: ApplicationHandler<Self::UserEvent>>(
+        &mut self,
+        timeout: Option<Duration>,
+        app: &mut A,
+    ) -> PumpStatus {
+        #[allow(deprecated)]
+        self.pump_events(timeout, |event, event_loop| {
+            event_loop::dispatch_event_for_app(app, event_loop, event)
+        })
+    }
+
+    /// See [`pump_app_events`].
+    ///
+    /// [`pump_app_events`]: Self::pump_app_events
+    #[deprecated = "use EventLoopExtPumpEvents::pump_app_events"]
     fn pump_events<F>(&mut self, timeout: Option<Duration>, event_handler: F) -> PumpStatus
     where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget);
+        F: FnMut(Event<Self::UserEvent>, &ActiveEventLoop);
 }
 
 impl<T> EventLoopExtPumpEvents for EventLoop<T> {
@@ -182,8 +129,16 @@ impl<T> EventLoopExtPumpEvents for EventLoop<T> {
 
     fn pump_events<F>(&mut self, timeout: Option<Duration>, event_handler: F) -> PumpStatus
     where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget),
+        F: FnMut(Event<Self::UserEvent>, &ActiveEventLoop),
     {
         self.event_loop.pump_events(timeout, event_handler)
     }
 }
+
+/// The return status for `pump_events`
+pub enum PumpStatus {
+    /// Continue running external loop.
+    Continue,
+    /// Exit external loop.
+    Exit(i32),
+}

src/platform/run_on_demand.rs

@@ -1,8 +1,7 @@
-use crate::{
-    error::EventLoopError,
-    event::Event,
-    event_loop::{EventLoop, EventLoopWindowTarget},
-};
+use crate::application::ApplicationHandler;
+use crate::error::EventLoopError;
+use crate::event::Event;
+use crate::event_loop::{self, ActiveEventLoop, EventLoop};
 
 #[cfg(doc)]
 use crate::{platform::pump_events::EventLoopExtPumpEvents, window::Window};
@@ -10,12 +9,19 @@ use crate::{platform::pump_events::EventLoopExtPumpEvents, window::Window};
 /// Additional methods on [`EventLoop`] to return control flow to the caller.
 pub trait EventLoopExtRunOnDemand {
     /// A type provided by the user that can be passed through [`Event::UserEvent`].
-    type UserEvent;
+    type UserEvent: 'static;
 
-    /// Runs the event loop in the calling thread and calls the given `event_handler` closure
-    /// to dispatch any window system events.
+    /// See [`run_app_on_demand`].
     ///
-    /// Unlike [`EventLoop::run`], this function accepts non-`'static` (i.e. non-`move`) closures
+    /// [`run_app_on_demand`]: Self::run_app_on_demand
+    #[deprecated = "use EventLoopExtRunOnDemand::run_app_on_demand"]
+    fn run_on_demand<F>(&mut self, event_handler: F) -> Result<(), EventLoopError>
+    where
+        F: FnMut(Event<Self::UserEvent>, &ActiveEventLoop);
+
+    /// Run the application with the event loop on the calling thread.
+    ///
+    /// Unlike [`EventLoop::run_app`], this function accepts non-`'static` (i.e. non-`move`) closures
     /// and it is possible to return control back to the caller without
     /// consuming the `EventLoop` (by using [`exit()`]) and
     /// so the event loop can be re-run after it has exit.
@@ -26,11 +32,10 @@ pub trait EventLoopExtRunOnDemand {
     ///
     /// This API is not designed to run an event loop in bursts that you can exit from and return
     /// to while maintaining the full state of your application. (If you need something like this
-    /// you can look at the [`EventLoopExtPumpEvents::pump_events()`] API)
+    /// you can look at the [`EventLoopExtPumpEvents::pump_app_events()`] API)
     ///
-    /// Each time `run_on_demand` is called the `event_handler` can expect to receive a
-    /// `NewEvents(Init)` and `Resumed` event (even on platforms that have no suspend/resume
-    /// lifecycle) - which can be used to consistently initialize application state.
+    /// Each time `run_app_on_demand` is called the startup sequence of `init`, followed by
+    /// `resume` is being preserved.
     ///
     /// See the [`set_control_flow()`] docs on how to change the event loop's behavior.
     ///
@@ -40,8 +45,8 @@ pub trait EventLoopExtRunOnDemand {
     ///   backend it is possible to use `EventLoopExtWebSys::spawn()`[^1] more than once instead).
     /// - No [`Window`] state can be carried between separate runs of the event loop.
     ///
-    /// You are strongly encouraged to use [`EventLoop::run()`] for portability, unless you specifically need
-    /// the ability to re-run a single event loop more than once
+    /// You are strongly encouraged to use [`EventLoop::run_app()`] for portability, unless you
+    /// specifically need the ability to re-run a single event loop more than once
     ///
     /// # Supported Platforms
     /// - Windows
@@ -62,11 +67,17 @@ pub trait EventLoopExtRunOnDemand {
         doc = "[^1]: `spawn()` is only available on `wasm` platforms."
     )]
     ///
-    /// [`exit()`]: EventLoopWindowTarget::exit()
-    /// [`set_control_flow()`]: EventLoopWindowTarget::set_control_flow()
-    fn run_on_demand<F>(&mut self, event_handler: F) -> Result<(), EventLoopError>
-    where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget);
+    /// [`exit()`]: ActiveEventLoop::exit()
+    /// [`set_control_flow()`]: ActiveEventLoop::set_control_flow()
+    fn run_app_on_demand<A: ApplicationHandler<Self::UserEvent>>(
+        &mut self,
+        app: &mut A,
+    ) -> Result<(), EventLoopError> {
+        #[allow(deprecated)]
+        self.run_on_demand(|event, event_loop| {
+            event_loop::dispatch_event_for_app(app, event_loop, event)
+        })
+    }
 }
 
 impl<T> EventLoopExtRunOnDemand for EventLoop<T> {
@@ -74,14 +85,14 @@ impl<T> EventLoopExtRunOnDemand for EventLoop<T> {
 
     fn run_on_demand<F>(&mut self, event_handler: F) -> Result<(), EventLoopError>
     where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget),
+        F: FnMut(Event<Self::UserEvent>, &ActiveEventLoop),
     {
         self.event_loop.window_target().clear_exit();
         self.event_loop.run_on_demand(event_handler)
     }
 }
 
-impl EventLoopWindowTarget {
+impl ActiveEventLoop {
     /// Clear exit status.
     pub(crate) fn clear_exit(&self) {
         self.p.clear_exit()

src/platform/scancode.rs

@@ -9,7 +9,7 @@ use crate::keyboard::{KeyCode, PhysicalKey};
 pub trait PhysicalKeyExtScancode {
     /// The raw value of the platform-specific physical key identifier.
     ///
-    /// Returns `Some(key_id)` if the conversion was succesful; returns `None` otherwise.
+    /// Returns `Some(key_id)` if the conversion was successful; returns `None` otherwise.
     ///
     /// ## Platform-specific
     /// - **Windows:** A 16bit extended scancode

src/platform/startup_notify.rs

@@ -24,8 +24,8 @@
 use std::env;
 
 use crate::error::NotSupportedError;
-use crate::event_loop::{AsyncRequestSerial, EventLoopWindowTarget};
-use crate::window::{ActivationToken, Window, WindowBuilder};
+use crate::event_loop::{ActiveEventLoop, AsyncRequestSerial};
+use crate::window::{ActivationToken, Window, WindowAttributes};
 
 /// The variable which is used mostly on X11.
 const X11_VAR: &str = "DESKTOP_STARTUP_ID";
@@ -47,7 +47,7 @@ pub trait WindowExtStartupNotify {
     fn request_activation_token(&self) -> Result<AsyncRequestSerial, NotSupportedError>;
 }
 
-pub trait WindowBuilderExtStartupNotify {
+pub trait WindowAttributesExtStartupNotify {
     /// Use this [`ActivationToken`] during window creation.
     ///
     /// Not using such a token upon a window could make your window not gaining
@@ -55,16 +55,16 @@ pub trait WindowBuilderExtStartupNotify {
     fn with_activation_token(self, token: ActivationToken) -> Self;
 }
 
-impl EventLoopExtStartupNotify for EventLoopWindowTarget {
+impl EventLoopExtStartupNotify for ActiveEventLoop {
     fn read_token_from_env(&self) -> Option<ActivationToken> {
         match self.p {
             #[cfg(wayland_platform)]
-            crate::platform_impl::EventLoopWindowTarget::Wayland(_) => env::var(WAYLAND_VAR),
+            crate::platform_impl::ActiveEventLoop::Wayland(_) => env::var(WAYLAND_VAR),
             #[cfg(x11_platform)]
-            crate::platform_impl::EventLoopWindowTarget::X(_) => env::var(X11_VAR),
+            crate::platform_impl::ActiveEventLoop::X(_) => env::var(X11_VAR),
         }
         .ok()
-        .map(ActivationToken::new)
+        .map(ActivationToken::_new)
     }
 }
 
@@ -74,9 +74,9 @@ impl WindowExtStartupNotify for Window {
     }
 }
 
-impl WindowBuilderExtStartupNotify for WindowBuilder {
+impl WindowAttributesExtStartupNotify for WindowAttributes {
     fn with_activation_token(mut self, token: ActivationToken) -> Self {
-        self.window.platform_specific.activation_token = Some(token);
+        self.platform_specific.activation_token = Some(token);
         self
     }
 }
@@ -94,6 +94,6 @@ pub fn reset_activation_token_env() {
 ///
 /// This could be used before running daemon processes.
 pub fn set_activation_token_env(token: ActivationToken) {
-    env::set_var(X11_VAR, token.token());
-    env::set_var(WAYLAND_VAR, token.token());
+    env::set_var(X11_VAR, &token._token);
+    env::set_var(WAYLAND_VAR, token._token);
 }

src/platform/wayland.rs

@@ -1,18 +1,33 @@
+//! # Wayland
+//!
+//! **Note:** Windows don't appear on Wayland until you draw/present to them.
+//!
+//! By default, Winit loads system libraries using `dlopen`. This can be
+//! disabled by disabling the `"wayland-dlopen"` cargo feature.
+//!
+//! ## Client-side decorations
+//!
+//! Winit provides client-side decorations by default, but the behaviour can
+//! be controlled with the following feature flags:
+//!
+//! * `wayland-csd-adwaita` (default).
+//! * `wayland-csd-adwaita-crossfont`.
+//! * `wayland-csd-adwaita-notitle`.
 use crate::{
-    event_loop::{EventLoopBuilder, EventLoopWindowTarget},
+    event_loop::{ActiveEventLoop, EventLoopBuilder},
     monitor::MonitorHandle,
-    window::{Window, WindowBuilder},
+    window::{Window, WindowAttributes},
 };
 
 pub use crate::window::Theme;
 
-/// Additional methods on [`EventLoopWindowTarget`] that are specific to Wayland.
-pub trait EventLoopWindowTargetExtWayland {
-    /// True if the [`EventLoopWindowTarget`] uses Wayland.
+/// Additional methods on [`ActiveEventLoop`] that are specific to Wayland.
+pub trait ActiveEventLoopExtWayland {
+    /// True if the [`ActiveEventLoop`] uses Wayland.
     fn is_wayland(&self) -> bool;
 }
 
-impl EventLoopWindowTargetExtWayland for EventLoopWindowTarget {
+impl ActiveEventLoopExtWayland for ActiveEventLoop {
     #[inline]
     fn is_wayland(&self) -> bool {
         self.p.is_wayland()
@@ -50,22 +65,22 @@ pub trait WindowExtWayland {}
 
 impl WindowExtWayland for Window {}
 
-/// Additional methods on [`WindowBuilder`] that are specific to Wayland.
-pub trait WindowBuilderExtWayland {
+/// Additional methods on [`WindowAttributes`] that are specific to Wayland.
+pub trait WindowAttributesExtWayland {
     /// Build window with the given name.
     ///
     /// The `general` name sets an application ID, which should match the `.desktop`
-    /// file destributed with your program. The `instance` is a `no-op`.
+    /// file distributed with your program. The `instance` is a `no-op`.
     ///
     /// For details about application ID conventions, see the
     /// [Desktop Entry Spec](https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#desktop-file-id)
     fn with_name(self, general: impl Into<String>, instance: impl Into<String>) -> Self;
 }
 
-impl WindowBuilderExtWayland for WindowBuilder {
+impl WindowAttributesExtWayland for WindowAttributes {
     #[inline]
     fn with_name(mut self, general: impl Into<String>, instance: impl Into<String>) -> Self {
-        self.window.platform_specific.name = Some(crate::platform_impl::ApplicationName::new(
+        self.platform_specific.name = Some(crate::platform_impl::ApplicationName::new(
             general.into(),
             instance.into(),
         ));

src/platform/web.rs

@@ -1,12 +1,31 @@
-//! The web target does not automatically insert the canvas element object into the web page, to
-//! allow end users to determine how the page should be laid out. Use the [`WindowExtWebSys`] trait
-//! to retrieve the canvas from the Window. Alternatively, use the [`WindowBuilderExtWebSys`] trait
-//! to provide your own canvas.
+//! # Web
+//!
+//! The officially supported browsers are Chrome, Firefox and Safari 13.1+,
+//! though forks of these should work fine.
+//!
+//! Winit supports compiling to the `wasm32-unknown-unknown` target with
+//! `web-sys`.
+//!
+//! On the web platform, a Winit window is backed by a `<canvas>` element. You
+//! can either [provide Winit with a `<canvas>` element][with_canvas], or
+//! [let Winit create a `<canvas>` element which you can then retrieve][get]
+//! and insert it into the DOM yourself.
+//!
+//! Currently, there is no example code using Winit on Web, see [#3473]. For
+//! information on using Rust on WebAssembly, check out the [Rust and
+//! WebAssembly book].
+//!
+//! [with_canvas]: WindowAttributesExtWebSys::with_canvas
+//! [get]: WindowExtWebSys::canvas
+//! [#3473]: https://github.com/rust-windowing/winit/issues/3473
+//! [Rust and WebAssembly book]: https://rustwasm.github.io/book/
+//!
+//! ## CSS properties
 //!
 //! It is recommended **not** to apply certain CSS properties to the canvas:
-//! - [`transform`]
-//! - [`border`]
-//! - [`padding`]
+//! - [`transform`](https://developer.mozilla.org/en-US/docs/Web/CSS/transform)
+//! - [`border`](https://developer.mozilla.org/en-US/docs/Web/CSS/border)
+//! - [`padding`](https://developer.mozilla.org/en-US/docs/Web/CSS/padding)
 //!
 //! The following APIs can't take them into account and will therefore provide inaccurate results:
 //! - [`WindowEvent::Resized`] and [`Window::(set_)inner_size()`]
@@ -16,16 +35,13 @@
 //! - [`Window::set_outer_position()`]
 //!
 //! [`WindowEvent::Resized`]: crate::event::WindowEvent::Resized
-//! [`Window::(set_)inner_size()`]: crate::window::Window::inner_size()
+//! [`Window::(set_)inner_size()`]: crate::window::Window::inner_size
 //! [`WindowEvent::Occluded`]: crate::event::WindowEvent::Occluded
 //! [`WindowEvent::CursorMoved`]: crate::event::WindowEvent::CursorMoved
 //! [`WindowEvent::CursorEntered`]: crate::event::WindowEvent::CursorEntered
 //! [`WindowEvent::CursorLeft`]: crate::event::WindowEvent::CursorLeft
 //! [`WindowEvent::Touch`]: crate::event::WindowEvent::Touch
-//! [`Window::set_outer_position()`]: crate::window::Window::set_outer_position()
-//! [`transform`]: https://developer.mozilla.org/en-US/docs/Web/CSS/transform
-//! [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
-//! [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
+//! [`Window::set_outer_position()`]: crate::window::Window::set_outer_position
 
 use std::error::Error;
 use std::fmt::{self, Display, Formatter};
@@ -37,13 +53,14 @@ use std::time::Duration;
 #[cfg(web_platform)]
 use web_sys::HtmlCanvasElement;
 
-use crate::cursor::CustomCursorBuilder;
+use crate::application::ApplicationHandler;
+use crate::cursor::CustomCursorSource;
 use crate::event::Event;
-use crate::event_loop::{EventLoop, EventLoopWindowTarget};
+use crate::event_loop::{self, ActiveEventLoop, EventLoop};
 #[cfg(web_platform)]
 use crate::platform_impl::CustomCursorFuture as PlatformCustomCursorFuture;
-use crate::platform_impl::{PlatformCustomCursor, PlatformCustomCursorBuilder};
-use crate::window::{CustomCursor, Window, WindowBuilder};
+use crate::platform_impl::PlatformCustomCursorSource;
+use crate::window::{CustomCursor, Window, WindowAttributes};
 
 #[cfg(not(web_platform))]
 #[doc(hidden)]
@@ -85,9 +102,9 @@ impl WindowExtWebSys for Window {
     }
 }
 
-pub trait WindowBuilderExtWebSys {
+pub trait WindowAttributesExtWebSys {
     /// Pass an [`HtmlCanvasElement`] to be used for this [`Window`]. If [`None`],
-    /// [`WindowBuilder::build()`] will create one.
+    /// [`WindowAttributes::default()`] will create one.
     ///
     /// In any case, the canvas won't be automatically inserted into the web page.
     ///
@@ -119,24 +136,24 @@ pub trait WindowBuilderExtWebSys {
     fn with_append(self, append: bool) -> Self;
 }
 
-impl WindowBuilderExtWebSys for WindowBuilder {
+impl WindowAttributesExtWebSys for WindowAttributes {
     fn with_canvas(mut self, canvas: Option<HtmlCanvasElement>) -> Self {
-        self.window.platform_specific.set_canvas(canvas);
+        self.platform_specific.set_canvas(canvas);
         self
     }
 
     fn with_prevent_default(mut self, prevent_default: bool) -> Self {
-        self.window.platform_specific.prevent_default = prevent_default;
+        self.platform_specific.prevent_default = prevent_default;
         self
     }
 
     fn with_focusable(mut self, focusable: bool) -> Self {
-        self.window.platform_specific.focusable = focusable;
+        self.platform_specific.focusable = focusable;
         self
     }
 
     fn with_append(mut self, append: bool) -> Self {
-        self.window.platform_specific.append = append;
+        self.platform_specific.append = append;
         self
     }
 }
@@ -144,18 +161,18 @@ impl WindowBuilderExtWebSys for WindowBuilder {
 /// Additional methods on `EventLoop` that are specific to the web.
 pub trait EventLoopExtWebSys {
     /// A type provided by the user that can be passed through `Event::UserEvent`.
-    type UserEvent;
+    type UserEvent: 'static;
 
     /// Initializes the winit event loop.
     ///
     /// Unlike
     #[cfg_attr(
         all(web_platform, target_feature = "exception-handling"),
-        doc = "`run()`"
+        doc = "`run_app()`"
     )]
     #[cfg_attr(
         not(all(web_platform, target_feature = "exception-handling")),
-        doc = "[`run()`]"
+        doc = "[`run_app()`]"
     )]
     /// [^1], this returns immediately, and doesn't throw an exception in order to
     /// satisfy its [`!`] return type.
@@ -167,26 +184,38 @@ pub trait EventLoopExtWebSys {
     ///
     #[cfg_attr(
         not(all(web_platform, target_feature = "exception-handling")),
-        doc = "[`run()`]: EventLoop::run()"
+        doc = "[`run_app()`]: EventLoop::run_app()"
     )]
-    /// [^1]: `run()` is _not_ available on WASM when the target supports `exception-handling`.
+    /// [^1]: `run_app()` is _not_ available on WASM when the target supports `exception-handling`.
+    fn spawn_app<A: ApplicationHandler<Self::UserEvent> + 'static>(self, app: A);
+
+    /// See [`spawn_app`].
+    ///
+    /// [`spawn_app`]: Self::spawn_app
+    #[deprecated = "use EventLoopExtWebSys::spawn_app"]
     fn spawn<F>(self, event_handler: F)
     where
-        F: 'static + FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget);
+        F: 'static + FnMut(Event<Self::UserEvent>, &ActiveEventLoop);
 }
 
 impl<T> EventLoopExtWebSys for EventLoop<T> {
     type UserEvent = T;
 
+    fn spawn_app<A: ApplicationHandler<Self::UserEvent> + 'static>(self, mut app: A) {
+        self.event_loop.spawn(move |event, event_loop| {
+            event_loop::dispatch_event_for_app(&mut app, event_loop, event)
+        });
+    }
+
     fn spawn<F>(self, event_handler: F)
     where
-        F: 'static + FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget),
+        F: 'static + FnMut(Event<Self::UserEvent>, &ActiveEventLoop),
     {
         self.event_loop.spawn(event_handler)
     }
 }
 
-pub trait EventLoopWindowTargetExtWebSys {
+pub trait ActiveEventLoopExtWebSys {
     /// Sets the strategy for [`ControlFlow::Poll`].
     ///
     /// See [`PollStrategy`].
@@ -200,9 +229,18 @@ pub trait EventLoopWindowTargetExtWebSys {
     ///
     /// [`ControlFlow::Poll`]: crate::event_loop::ControlFlow::Poll
     fn poll_strategy(&self) -> PollStrategy;
+
+    /// Async version of [`ActiveEventLoop::create_custom_cursor()`] which waits until the
+    /// cursor has completely finished loading.
+    fn create_custom_cursor_async(&self, source: CustomCursorSource) -> CustomCursorFuture;
 }
 
-impl EventLoopWindowTargetExtWebSys for EventLoopWindowTarget {
+impl ActiveEventLoopExtWebSys for ActiveEventLoop {
+    #[inline]
+    fn create_custom_cursor_async(&self, source: CustomCursorSource) -> CustomCursorFuture {
+        self.p.create_custom_cursor_async(source)
+    }
+
     #[inline]
     fn set_poll_strategy(&self, strategy: PollStrategy) {
         self.p.set_poll_strategy(strategy);
@@ -249,14 +287,14 @@ pub trait CustomCursorExtWebSys {
     /// 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;
+    fn from_url(url: String, hotspot_x: u16, hotspot_y: u16) -> CustomCursorSource;
 
     /// Crates a new animated cursor from multiple [`CustomCursor`]s.
     /// Supplied `cursors` can't be empty or other animations.
     fn from_animation(
         duration: Duration,
         cursors: Vec<CustomCursor>,
-    ) -> Result<CustomCursorBuilder, BadAnimation>;
+    ) -> Result<CustomCursorSource, BadAnimation>;
 }
 
 impl CustomCursorExtWebSys for CustomCursor {
@@ -264,9 +302,9 @@ impl CustomCursorExtWebSys for CustomCursor {
         self.inner.animation
     }
 
-    fn from_url(url: String, hotspot_x: u16, hotspot_y: u16) -> CustomCursorBuilder {
-        CustomCursorBuilder {
-            inner: PlatformCustomCursorBuilder::Url {
+    fn from_url(url: String, hotspot_x: u16, hotspot_y: u16) -> CustomCursorSource {
+        CustomCursorSource {
+            inner: PlatformCustomCursorSource::Url {
                 url,
                 hotspot_x,
                 hotspot_y,
@@ -277,7 +315,7 @@ impl CustomCursorExtWebSys for CustomCursor {
     fn from_animation(
         duration: Duration,
         cursors: Vec<CustomCursor>,
-    ) -> Result<CustomCursorBuilder, BadAnimation> {
+    ) -> Result<CustomCursorSource, BadAnimation> {
         if cursors.is_empty() {
             return Err(BadAnimation::Empty);
         }
@@ -286,8 +324,8 @@ impl CustomCursorExtWebSys for CustomCursor {
             return Err(BadAnimation::Animation);
         }
 
-        Ok(CustomCursorBuilder {
-            inner: PlatformCustomCursorBuilder::Animation { duration, cursors },
+        Ok(CustomCursorSource {
+            inner: PlatformCustomCursorSource::Animation { duration, cursors },
         })
     }
 }
@@ -312,26 +350,11 @@ impl fmt::Display for BadAnimation {
 
 impl Error for BadAnimation {}
 
-pub trait CustomCursorBuilderExtWebSys {
-    /// Async version of [`CustomCursorBuilder::build()`] which waits until the
-    /// cursor has completely finished loading.
-    fn build_async(self, window_target: &EventLoopWindowTarget) -> CustomCursorFuture;
-}
-
-impl CustomCursorBuilderExtWebSys for CustomCursorBuilder {
-    fn build_async(self, window_target: &EventLoopWindowTarget) -> CustomCursorFuture {
-        CustomCursorFuture(PlatformCustomCursor::build_async(
-            self.inner,
-            &window_target.p,
-        ))
-    }
-}
-
 #[cfg(not(web_platform))]
 struct PlatformCustomCursorFuture;
 
 #[derive(Debug)]
-pub struct CustomCursorFuture(PlatformCustomCursorFuture);
+pub struct CustomCursorFuture(pub(crate) PlatformCustomCursorFuture);
 
 impl Future for CustomCursorFuture {
     type Output = Result<CustomCursor, CustomCursorError>;

src/platform/windows.rs

@@ -1,3 +1,7 @@
+//! # Windows
+//!
+//! The supported OS version is Windows 7 or higher, though Windows 10 is
+//! tested regularly.
 use std::{ffi::c_void, path::Path};
 
 use crate::{
@@ -5,7 +9,7 @@ use crate::{
     event::DeviceId,
     event_loop::EventLoopBuilder,
     monitor::MonitorHandle,
-    window::{BadIcon, Icon, Window, WindowBuilder},
+    window::{BadIcon, Icon, Window, WindowAttributes},
 };
 
 /// Window Handle type used by Win32 API
@@ -198,7 +202,7 @@ pub trait WindowExtWindows {
     ///
     /// A window must be enabled before it can be activated.
     /// If an application has create a modal dialog box by disabling its owner window
-    /// (as described in [`WindowBuilderExtWindows::with_owner_window`]), the application must enable
+    /// (as described in [`WindowAttributesExtWindows::with_owner_window`]), the application must enable
     /// the owner window before destroying the dialog box.
     /// Otherwise, another window will receive the keyboard focus and be activated.
     ///
@@ -296,11 +300,11 @@ impl WindowExtWindows for Window {
     }
 }
 
-/// Additional methods on `WindowBuilder` that are specific to Windows.
+/// Additional methods on `WindowAttributes` that are specific to Windows.
 #[allow(rustdoc::broken_intra_doc_links)]
-pub trait WindowBuilderExtWindows {
+pub trait WindowAttributesExtWindows {
     /// Set an owner to the window to be created. Can be used to create a dialog box, for example.
-    /// This only works when [`WindowBuilder::with_parent_window`] isn't called or set to `None`.
+    /// This only works when [`WindowAttributes::with_parent_window`] isn't called or set to `None`.
     /// Can be used in combination with [`WindowExtWindows::set_enable(false)`](WindowExtWindows::set_enable)
     /// on the owner window to create a modal dialog box.
     ///
@@ -386,88 +390,88 @@ pub trait WindowBuilderExtWindows {
     fn with_corner_preference(self, corners: CornerPreference) -> Self;
 }
 
-impl WindowBuilderExtWindows for WindowBuilder {
+impl WindowAttributesExtWindows for WindowAttributes {
     #[inline]
     fn with_owner_window(mut self, parent: HWND) -> Self {
-        self.window.platform_specific.owner = Some(parent);
+        self.platform_specific.owner = Some(parent);
         self
     }
 
     #[inline]
     fn with_menu(mut self, menu: HMENU) -> Self {
-        self.window.platform_specific.menu = Some(menu);
+        self.platform_specific.menu = Some(menu);
         self
     }
 
     #[inline]
     fn with_taskbar_icon(mut self, taskbar_icon: Option<Icon>) -> Self {
-        self.window.platform_specific.taskbar_icon = taskbar_icon;
+        self.platform_specific.taskbar_icon = taskbar_icon;
         self
     }
 
     #[inline]
     fn with_no_redirection_bitmap(mut self, flag: bool) -> Self {
-        self.window.platform_specific.no_redirection_bitmap = flag;
+        self.platform_specific.no_redirection_bitmap = flag;
         self
     }
 
     #[inline]
     fn with_drag_and_drop(mut self, flag: bool) -> Self {
-        self.window.platform_specific.drag_and_drop = flag;
+        self.platform_specific.drag_and_drop = flag;
         self
     }
 
     #[inline]
     fn with_skip_taskbar(mut self, skip: bool) -> Self {
-        self.window.platform_specific.skip_taskbar = skip;
+        self.platform_specific.skip_taskbar = skip;
         self
     }
 
     #[inline]
     fn with_class_name<S: Into<String>>(mut self, class_name: S) -> Self {
-        self.window.platform_specific.class_name = class_name.into();
+        self.platform_specific.class_name = class_name.into();
         self
     }
 
     #[inline]
     fn with_undecorated_shadow(mut self, shadow: bool) -> Self {
-        self.window.platform_specific.decoration_shadow = shadow;
+        self.platform_specific.decoration_shadow = shadow;
         self
     }
 
     #[inline]
     fn with_system_backdrop(mut self, backdrop_type: BackdropType) -> Self {
-        self.window.platform_specific.backdrop_type = backdrop_type;
+        self.platform_specific.backdrop_type = backdrop_type;
         self
     }
 
     #[inline]
     fn with_clip_children(mut self, flag: bool) -> Self {
-        self.window.platform_specific.clip_children = flag;
+        self.platform_specific.clip_children = flag;
         self
     }
 
     #[inline]
     fn with_border_color(mut self, color: Option<Color>) -> Self {
-        self.window.platform_specific.border_color = Some(color.unwrap_or(Color::NONE));
+        self.platform_specific.border_color = Some(color.unwrap_or(Color::NONE));
         self
     }
 
     #[inline]
     fn with_title_background_color(mut self, color: Option<Color>) -> Self {
-        self.window.platform_specific.title_background_color = Some(color.unwrap_or(Color::NONE));
+        self.platform_specific.title_background_color = Some(color.unwrap_or(Color::NONE));
         self
     }
 
     #[inline]
     fn with_title_text_color(mut self, color: Color) -> Self {
-        self.window.platform_specific.title_text_color = Some(color);
+        self.platform_specific.title_text_color = Some(color);
         self
     }
 
     #[inline]
     fn with_corner_preference(mut self, corners: CornerPreference) -> Self {
-        self.window.platform_specific.corner_preference = Some(corners);
+        self.platform_specific.corner_preference = Some(corners);
         self
     }
 }
@@ -504,7 +508,7 @@ pub trait DeviceIdExtWindows {
 impl DeviceIdExtWindows for DeviceId {
     #[inline]
     fn persistent_identifier(&self) -> Option<String> {
-        crate::platform_impl::persistent_identifier(*self)
+        self.0.persistent_identifier()
     }
 }
 

src/platform/x11.rs

@@ -1,10 +1,11 @@
+//! # X11
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
 use crate::{
-    event_loop::{EventLoopBuilder, EventLoopWindowTarget},
+    event_loop::{ActiveEventLoop, EventLoopBuilder},
     monitor::MonitorHandle,
-    window::{Window, WindowBuilder},
+    window::{Window, WindowAttributes},
 };
 
 use crate::dpi::Size;
@@ -61,7 +62,7 @@ pub enum WindowType {
 pub type XlibErrorHook =
     Box<dyn Fn(*mut std::ffi::c_void, *mut std::ffi::c_void) -> bool + Send + Sync>;
 
-/// A unique identifer for an X11 visual.
+/// A unique identifier for an X11 visual.
 pub type XVisualID = u32;
 
 /// A unique identifier for an X11 window.
@@ -69,7 +70,7 @@ pub type XWindow = u32;
 
 /// Hook to winit's xlib error handling callback.
 ///
-/// This method is provided as a safe way to handle the errors comming from X11
+/// This method is provided as a safe way to handle the errors coming from X11
 /// when using xlib in external crates, like glutin for GLX access. Trying to
 /// handle errors by speculating with `XSetErrorHandler` is [`unsafe`].
 ///
@@ -89,13 +90,13 @@ pub fn register_xlib_error_hook(hook: XlibErrorHook) {
     }
 }
 
-/// Additional methods on [`EventLoopWindowTarget`] that are specific to X11.
-pub trait EventLoopWindowTargetExtX11 {
-    /// True if the [`EventLoopWindowTarget`] uses X11.
+/// Additional methods on [`ActiveEventLoop`] that are specific to X11.
+pub trait ActiveEventLoopExtX11 {
+    /// True if the [`ActiveEventLoop`] uses X11.
     fn is_x11(&self) -> bool;
 }
 
-impl EventLoopWindowTargetExtX11 for EventLoopWindowTarget {
+impl ActiveEventLoopExtX11 for ActiveEventLoop {
     #[inline]
     fn is_x11(&self) -> bool {
         !self.p.is_wayland()
@@ -133,8 +134,8 @@ pub trait WindowExtX11 {}
 
 impl WindowExtX11 for Window {}
 
-/// Additional methods on [`WindowBuilder`] that are specific to X11.
-pub trait WindowBuilderExtX11 {
+/// Additional methods on [`WindowAttributes`] that are specific to X11.
+pub trait WindowAttributesExtX11 {
     /// Create this window with a specific X11 visual.
     fn with_x11_visual(self, visual_id: XVisualID) -> Self;
 
@@ -160,12 +161,12 @@ pub trait WindowBuilderExtX11 {
     /// ```
     /// # use winit::dpi::{LogicalSize, PhysicalSize};
     /// # use winit::window::Window;
-    /// # use winit::platform::x11::WindowBuilderExtX11;
+    /// # use winit::platform::x11::WindowAttributesExtX11;
     /// // Specify the size in logical dimensions like this:
-    /// Window::builder().with_base_size(LogicalSize::new(400.0, 200.0));
+    /// Window::default_attributes().with_base_size(LogicalSize::new(400.0, 200.0));
     ///
     /// // Or specify the size in physical dimensions like this:
-    /// Window::builder().with_base_size(PhysicalSize::new(400, 200));
+    /// Window::default_attributes().with_base_size(PhysicalSize::new(400, 200));
     /// ```
     fn with_base_size<S: Into<Size>>(self, base_size: S) -> Self;
 
@@ -175,34 +176,33 @@ pub trait WindowBuilderExtX11 {
     ///
     /// ```no_run
     /// use winit::window::Window;
-    /// use winit::platform::x11::{XWindow, WindowBuilderExtX11};
-    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
-    /// let event_loop = winit::event_loop::EventLoop::new().unwrap();
+    /// use winit::event_loop::ActiveEventLoop;
+    /// use winit::platform::x11::{XWindow, WindowAttributesExtX11};
+    /// # fn create_window(event_loop: &ActiveEventLoop) -> Result<(), Box<dyn std::error::Error>> {
     /// let parent_window_id = std::env::args().nth(1).unwrap().parse::<XWindow>()?;
-    /// let window = Window::builder()
-    ///     .with_embed_parent_window(parent_window_id)
-    ///     .build(&event_loop)?;
+    /// let window_attributes = Window::default_attributes().with_embed_parent_window(parent_window_id);
+    /// let window = event_loop.create_window(window_attributes)?;
     /// # Ok(()) }
     /// ```
     fn with_embed_parent_window(self, parent_window_id: XWindow) -> Self;
 }
 
-impl WindowBuilderExtX11 for WindowBuilder {
+impl WindowAttributesExtX11 for WindowAttributes {
     #[inline]
     fn with_x11_visual(mut self, visual_id: XVisualID) -> Self {
-        self.window.platform_specific.x11.visual_id = Some(visual_id);
+        self.platform_specific.x11.visual_id = Some(visual_id);
         self
     }
 
     #[inline]
     fn with_x11_screen(mut self, screen_id: i32) -> Self {
-        self.window.platform_specific.x11.screen_id = Some(screen_id);
+        self.platform_specific.x11.screen_id = Some(screen_id);
         self
     }
 
     #[inline]
     fn with_name(mut self, general: impl Into<String>, instance: impl Into<String>) -> Self {
-        self.window.platform_specific.name = Some(crate::platform_impl::ApplicationName::new(
+        self.platform_specific.name = Some(crate::platform_impl::ApplicationName::new(
             general.into(),
             instance.into(),
         ));
@@ -211,25 +211,25 @@ impl WindowBuilderExtX11 for WindowBuilder {
 
     #[inline]
     fn with_override_redirect(mut self, override_redirect: bool) -> Self {
-        self.window.platform_specific.x11.override_redirect = override_redirect;
+        self.platform_specific.x11.override_redirect = override_redirect;
         self
     }
 
     #[inline]
     fn with_x11_window_type(mut self, x11_window_types: Vec<WindowType>) -> Self {
-        self.window.platform_specific.x11.x11_window_types = x11_window_types;
+        self.platform_specific.x11.x11_window_types = x11_window_types;
         self
     }
 
     #[inline]
     fn with_base_size<S: Into<Size>>(mut self, base_size: S) -> Self {
-        self.window.platform_specific.x11.base_size = Some(base_size.into());
+        self.platform_specific.x11.base_size = Some(base_size.into());
         self
     }
 
     #[inline]
     fn with_embed_parent_window(mut self, parent_window_id: XWindow) -> Self {
-        self.window.platform_specific.x11.embed_window = Some(parent_window_id);
+        self.platform_specific.x11.embed_window = Some(parent_window_id);
         self
     }
 }

src/platform_impl/android/keycodes.rs

@@ -174,7 +174,7 @@ pub fn character_map_and_combine_key(
     let key_map = match app.device_key_character_map(device_id) {
         Ok(key_map) => key_map,
         Err(err) => {
-            log::warn!("Failed to look up `KeyCharacterMap` for device {device_id}: {err:?}");
+            tracing::warn!("Failed to look up `KeyCharacterMap` for device {device_id}: {err:?}");
             return None;
         }
     };
@@ -188,7 +188,7 @@ pub fn character_map_and_combine_key(
                         Ok(Some(key)) => Some(key),
                         Ok(None) => None,
                         Err(err) => {
-                            log::warn!("KeyEvent: Failed to combine 'dead key' accent '{accent}' with '{unicode}': {err:?}");
+                            tracing::warn!("KeyEvent: Failed to combine 'dead key' accent '{accent}' with '{unicode}': {err:?}");
                             None
                         }
                     }
@@ -213,7 +213,7 @@ pub fn character_map_and_combine_key(
             None
         }
         Err(err) => {
-            log::warn!("KeyEvent: Failed to get key map character: {err:?}");
+            tracing::warn!("KeyEvent: Failed to get key map character: {err:?}");
             *combining_accent = None;
             None
         }

src/platform_impl/android/mod.rs

@@ -7,7 +7,7 @@ use std::{
     marker::PhantomData,
     sync::{
         atomic::{AtomicBool, Ordering},
-        mpsc, Arc, Mutex, RwLock,
+        mpsc, Arc, Mutex,
     },
     time::{Duration, Instant},
 };
@@ -16,27 +16,29 @@ use android_activity::input::{InputEvent, KeyAction, Keycode, MotionAction};
 use android_activity::{
     AndroidApp, AndroidAppWaker, ConfigurationRef, InputStatus, MainEvent, Rect,
 };
-use log::{debug, trace, warn};
-use once_cell::sync::Lazy;
+use tracing::{debug, trace, warn};
 
 use crate::{
     cursor::Cursor,
     dpi::{PhysicalPosition, PhysicalSize, Position, Size},
     error,
     event::{self, Force, InnerSizeWriter, StartCause},
-    event_loop::{self, ControlFlow, DeviceEvents, EventLoopWindowTarget as RootELW},
+    event_loop::{self, ActiveEventLoop as RootAEL, ControlFlow, DeviceEvents},
     platform::pump_events::PumpStatus,
     window::{
-        self, CursorGrabMode, ImePurpose, ResizeDirection, Theme, WindowButtons, WindowId,
-        WindowLevel,
+        self, CursorGrabMode, CustomCursor, CustomCursorSource, ImePurpose, ResizeDirection, Theme,
+        WindowButtons, WindowLevel,
     },
 };
 use crate::{error::EventLoopError, platform_impl::Fullscreen};
 
 mod keycodes;
 
-static HAS_FOCUS: Lazy<RwLock<bool>> = Lazy::new(|| RwLock::new(true));
-const WINDOW_ID: u64 = 0;
+pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursor;
+pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursorSource;
+pub(crate) use crate::icon::NoIcon as PlatformIcon;
+
+static HAS_FOCUS: AtomicBool = AtomicBool::new(true);
 
 /// Returns the minimum `Option<Duration>`, taking into account that `None`
 /// equates to an infinite timeout, not a zero timeout (so can't just use
@@ -143,7 +145,7 @@ pub struct KeyEventExtra {}
 
 pub struct EventLoop<T: 'static> {
     android_app: AndroidApp,
-    window_target: event_loop::EventLoopWindowTarget,
+    window_target: event_loop::ActiveEventLoop,
     redraw_flag: SharedFlag,
     user_events_sender: mpsc::Sender<T>,
     user_events_receiver: PeekableReceiver<T>, //must wake looper whenever something gets sent
@@ -181,8 +183,8 @@ impl<T: 'static> EventLoop<T> {
 
         Ok(Self {
             android_app: android_app.clone(),
-            window_target: event_loop::EventLoopWindowTarget {
-                p: EventLoopWindowTarget {
+            window_target: event_loop::ActiveEventLoop {
+                p: ActiveEventLoop {
                     app: android_app.clone(),
                     control_flow: Cell::new(ControlFlow::default()),
                     exit: Cell::new(false),
@@ -207,7 +209,7 @@ impl<T: 'static> EventLoop<T> {
 
     fn single_iteration<F>(&mut self, main_event: Option<MainEvent<'_>>, callback: &mut F)
     where
-        F: FnMut(event::Event<T>, &RootELW),
+        F: FnMut(event::Event<T>, &RootAEL),
     {
         trace!("Mainloop iteration");
 
@@ -233,20 +235,20 @@ impl<T: 'static> EventLoop<T> {
                     warn!("TODO: find a way to notify application of content rect change");
                 }
                 MainEvent::GainedFocus => {
-                    *HAS_FOCUS.write().unwrap() = true;
+                    HAS_FOCUS.store(true, Ordering::Relaxed);
                     callback(
                         event::Event::WindowEvent {
-                            window_id: WindowId::from(WINDOW_ID),
+                            window_id: window::WindowId(WindowId),
                             event: event::WindowEvent::Focused(true),
                         },
                         self.window_target(),
                     );
                 }
                 MainEvent::LostFocus => {
-                    *HAS_FOCUS.write().unwrap() = false;
+                    HAS_FOCUS.store(false, Ordering::Relaxed);
                     callback(
                         event::Event::WindowEvent {
-                            window_id: WindowId::from(WINDOW_ID),
+                            window_id: window::WindowId(WindowId),
                             event: event::WindowEvent::Focused(false),
                         },
                         self.window_target(),
@@ -261,7 +263,7 @@ impl<T: 'static> EventLoop<T> {
                             MonitorHandle::new(self.android_app.clone()).size(),
                         ));
                         let event = event::Event::WindowEvent {
-                            window_id: WindowId::from(WINDOW_ID),
+                            window_id: window::WindowId(WindowId),
                             event: event::WindowEvent::ScaleFactorChanged {
                                 inner_size_writer: InnerSizeWriter::new(Arc::downgrade(
                                     &new_inner_size,
@@ -328,7 +330,7 @@ impl<T: 'static> EventLoop<T> {
                 }
             },
             Err(err) => {
-                log::warn!("Failed to get input events iterator: {err:?}");
+                tracing::warn!("Failed to get input events iterator: {err:?}");
             }
         }
 
@@ -349,7 +351,7 @@ impl<T: 'static> EventLoop<T> {
                     PhysicalSize::new(0, 0)
                 };
                 let event = event::Event::WindowEvent {
-                    window_id: WindowId::from(WINDOW_ID),
+                    window_id: window::WindowId(WindowId),
                     event: event::WindowEvent::Resized(size),
                 };
                 callback(event, self.window_target());
@@ -359,7 +361,7 @@ impl<T: 'static> EventLoop<T> {
             if pending_redraw {
                 pending_redraw = false;
                 let event = event::Event::WindowEvent {
-                    window_id: WindowId::from(WINDOW_ID),
+                    window_id: window::WindowId(WindowId),
                     event: event::WindowEvent::RedrawRequested,
                 };
                 callback(event, self.window_target());
@@ -379,13 +381,13 @@ impl<T: 'static> EventLoop<T> {
         callback: &mut F,
     ) -> InputStatus
     where
-        F: FnMut(event::Event<T>, &RootELW),
+        F: FnMut(event::Event<T>, &RootAEL),
     {
         let mut input_status = InputStatus::Handled;
         match event {
             InputEvent::MotionEvent(motion_event) => {
-                let window_id = WindowId::from(WINDOW_ID);
-                let device_id = event::DeviceId::from(motion_event.device_id() as u64);
+                let window_id = window::WindowId(WindowId);
+                let device_id = event::DeviceId(DeviceId(motion_event.device_id()));
 
                 let phase = match motion_event.action() {
                     MotionAction::Down | MotionAction::PointerDown => {
@@ -455,9 +457,9 @@ impl<T: 'static> EventLoop<T> {
                         );
 
                         let event = event::Event::WindowEvent {
-                            window_id: WindowId::from(WINDOW_ID),
+                            window_id: window::WindowId(WindowId),
                             event: event::WindowEvent::KeyboardInput {
-                                device_id: event::DeviceId::from(key.device_id() as u64),
+                                device_id: event::DeviceId(DeviceId(key.device_id())),
                                 event: event::KeyEvent {
                                     state,
                                     physical_key: keycodes::to_physical_key(keycode),
@@ -465,9 +467,7 @@ impl<T: 'static> EventLoop<T> {
                                     location: keycodes::to_location(keycode),
                                     repeat: key.repeat_count() > 0,
                                     text: None,
-                                    extra: event::KeyExtra {
-                                        extra: KeyEventExtra {},
-                                    },
+                                    platform_specific: KeyEventExtra {},
                                 },
                                 is_synthetic: false,
                             },
@@ -486,14 +486,14 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn run<F>(mut self, event_handler: F) -> Result<(), EventLoopError>
     where
-        F: FnMut(event::Event<T>, &event_loop::EventLoopWindowTarget),
+        F: FnMut(event::Event<T>, &event_loop::ActiveEventLoop),
     {
         self.run_on_demand(event_handler)
     }
 
     pub fn run_on_demand<F>(&mut self, mut event_handler: F) -> Result<(), EventLoopError>
     where
-        F: FnMut(event::Event<T>, &event_loop::EventLoopWindowTarget),
+        F: FnMut(event::Event<T>, &event_loop::ActiveEventLoop),
     {
         loop {
             match self.pump_events(None, &mut event_handler) {
@@ -512,7 +512,7 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn pump_events<F>(&mut self, timeout: Option<Duration>, mut callback: F) -> PumpStatus
     where
-        F: FnMut(event::Event<T>, &RootELW),
+        F: FnMut(event::Event<T>, &RootAEL),
     {
         if !self.loop_running {
             self.loop_running = true;
@@ -545,7 +545,7 @@ impl<T: 'static> EventLoop<T> {
 
     fn poll_events_with_timeout<F>(&mut self, mut timeout: Option<Duration>, mut callback: F)
     where
-        F: FnMut(event::Event<T>, &RootELW),
+        F: FnMut(event::Event<T>, &RootAEL),
     {
         let start = Instant::now();
 
@@ -621,7 +621,7 @@ impl<T: 'static> EventLoop<T> {
         });
     }
 
-    pub fn window_target(&self) -> &event_loop::EventLoopWindowTarget {
+    pub fn window_target(&self) -> &event_loop::ActiveEventLoop {
         &self.window_target
     }
 
@@ -665,18 +665,25 @@ impl<T> EventLoopProxy<T> {
     }
 }
 
-pub struct EventLoopWindowTarget {
+pub struct ActiveEventLoop {
     app: AndroidApp,
     control_flow: Cell<ControlFlow>,
     exit: Cell<bool>,
     redraw_requester: RedrawRequester,
 }
 
-impl EventLoopWindowTarget {
+impl ActiveEventLoop {
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
         Some(MonitorHandle::new(self.app.clone()))
     }
 
+    pub fn create_custom_cursor(&self, source: CustomCursorSource) -> CustomCursor {
+        let _ = source.inner;
+        CustomCursor {
+            inner: PlatformCustomCursor,
+        }
+    }
+
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         let mut v = VecDeque::with_capacity(1);
         v.push_back(MonitorHandle::new(self.app.clone()));
@@ -746,8 +753,38 @@ impl OwnedDisplayHandle {
     }
 }
 
+#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+pub(crate) struct WindowId;
+
+impl WindowId {
+    pub const fn dummy() -> Self {
+        WindowId
+    }
+}
+
+impl From<WindowId> for u64 {
+    fn from(_: WindowId) -> Self {
+        0
+    }
+}
+
+impl From<u64> for WindowId {
+    fn from(_: u64) -> Self {
+        Self
+    }
+}
+
+#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+pub struct DeviceId(i32);
+
+impl DeviceId {
+    pub const fn dummy() -> Self {
+        DeviceId(0)
+    }
+}
+
 #[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
-pub struct PlatformSpecificWindowBuilderAttributes;
+pub struct PlatformSpecificWindowAttributes;
 
 pub(crate) struct Window {
     app: AndroidApp,
@@ -756,7 +793,7 @@ pub(crate) struct Window {
 
 impl Window {
     pub(crate) fn new(
-        el: &EventLoopWindowTarget,
+        el: &ActiveEventLoop,
         _window_attrs: window::WindowAttributes,
     ) -> Result<Self, error::OsError> {
         // FIXME this ignores requested window attributes
@@ -776,7 +813,7 @@ impl Window {
     }
 
     pub fn id(&self) -> WindowId {
-        WindowId::from(WINDOW_ID)
+        WindowId
     }
 
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
@@ -977,7 +1014,7 @@ impl Window {
         if let Some(native_window) = self.app.native_window().as_ref() {
             native_window.raw_window_handle()
         } else {
-            log::error!("Cannot get the native window, it's null and will always be null before Event::Resumed and after Event::Suspended. Make sure you only call this function between those events.");
+            tracing::error!("Cannot get the native window, it's null and will always be null before Event::Resumed and after Event::Suspended. Make sure you only call this function between those events.");
             Err(rwh_06::HandleError::Unavailable)
         }
     }
@@ -1008,7 +1045,7 @@ impl Window {
     pub fn set_content_protected(&self, _protected: bool) {}
 
     pub fn has_focus(&self) -> bool {
-        *HAS_FOCUS.read().unwrap()
+        HAS_FOCUS.load(Ordering::Relaxed)
     }
 
     pub fn title(&self) -> String {
@@ -1028,10 +1065,6 @@ 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)]
 pub struct MonitorHandle {
     app: AndroidApp,

src/platform_impl/ios/app_delegate.rs

@@ -0,0 +1,103 @@
+use icrate::Foundation::{MainThreadMarker, NSObject, NSObjectProtocol};
+use objc2::{declare_class, mutability, ClassType, DeclaredClass};
+
+use super::app_state::{self, EventWrapper};
+use super::uikit::{UIApplication, UIWindow};
+use super::window::WinitUIWindow;
+use crate::{
+    event::{Event, WindowEvent},
+    window::WindowId as RootWindowId,
+};
+
+declare_class!(
+    pub struct AppDelegate;
+
+    unsafe impl ClassType for AppDelegate {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+        const NAME: &'static str = "WinitApplicationDelegate";
+    }
+
+    impl DeclaredClass for AppDelegate {}
+
+    // UIApplicationDelegate protocol
+    unsafe impl AppDelegate {
+        #[method(application:didFinishLaunchingWithOptions:)]
+        fn did_finish_launching(&self, _application: &UIApplication, _: *mut NSObject) -> bool {
+            app_state::did_finish_launching(MainThreadMarker::new().unwrap());
+            true
+        }
+
+        #[method(applicationDidBecomeActive:)]
+        fn did_become_active(&self, _application: &UIApplication) {
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Resumed))
+        }
+
+        #[method(applicationWillResignActive:)]
+        fn will_resign_active(&self, _application: &UIApplication) {
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Suspended))
+        }
+
+        #[method(applicationWillEnterForeground:)]
+        fn will_enter_foreground(&self, application: &UIApplication) {
+            self.send_occluded_event_for_all_windows(application, false);
+        }
+
+        #[method(applicationDidEnterBackground:)]
+        fn did_enter_background(&self, application: &UIApplication) {
+            self.send_occluded_event_for_all_windows(application, true);
+        }
+
+        #[method(applicationWillTerminate:)]
+        fn will_terminate(&self, application: &UIApplication) {
+            let mut events = Vec::new();
+            for window in application.windows().iter() {
+                if window.is_kind_of::<WinitUIWindow>() {
+                    // SAFETY: We just checked that the window is a `winit` window
+                    let window = unsafe {
+                        let ptr: *const UIWindow = window;
+                        let ptr: *const WinitUIWindow = ptr.cast();
+                        &*ptr
+                    };
+                    events.push(EventWrapper::StaticEvent(Event::WindowEvent {
+                        window_id: RootWindowId(window.id()),
+                        event: WindowEvent::Destroyed,
+                    }));
+                }
+            }
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_events(mtm, events);
+            app_state::terminated(mtm);
+        }
+
+        #[method(applicationDidReceiveMemoryWarning:)]
+        fn did_receive_memory_warning(&self, _application: &UIApplication) {
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::MemoryWarning))
+        }
+    }
+);
+
+impl AppDelegate {
+    fn send_occluded_event_for_all_windows(&self, application: &UIApplication, occluded: bool) {
+        let mut events = Vec::new();
+        for window in application.windows().iter() {
+            if window.is_kind_of::<WinitUIWindow>() {
+                // SAFETY: We just checked that the window is a `winit` window
+                let window = unsafe {
+                    let ptr: *const UIWindow = window;
+                    let ptr: *const WinitUIWindow = ptr.cast();
+                    &*ptr
+                };
+                events.push(EventWrapper::StaticEvent(Event::WindowEvent {
+                    window_id: RootWindowId(window.id()),
+                    event: WindowEvent::Occluded(occluded),
+                }));
+            }
+        }
+        let mtm = MainThreadMarker::new().unwrap();
+        app_state::handle_nonuser_events(mtm, events);
+    }
+}

src/platform_impl/ios/app_state.rs

@@ -6,7 +6,7 @@ use std::{
     fmt, mem,
     os::raw::c_void,
     ptr,
-    sync::{Arc, Mutex},
+    sync::{Arc, Mutex, OnceLock},
     time::Instant,
 };
 
@@ -22,14 +22,14 @@ use icrate::Foundation::{
 use objc2::rc::Id;
 use objc2::runtime::AnyObject;
 use objc2::{msg_send, sel};
-use once_cell::sync::Lazy;
 
 use super::uikit::UIView;
-use super::view::WinitUIWindow;
+use super::window::WinitUIWindow;
 use crate::{
     dpi::PhysicalSize,
     event::{Event, InnerSizeWriter, StartCause, WindowEvent},
-    event_loop::{ControlFlow, EventLoopWindowTarget as RootEventLoopWindowTarget},
+    event_loop::{ActiveEventLoop as RootActiveEventLoop, ControlFlow},
+    window::WindowId as RootWindowId,
 };
 
 macro_rules! bug {
@@ -49,8 +49,8 @@ pub(crate) struct HandlePendingUserEvents;
 
 pub(crate) struct EventLoopHandler {
     #[allow(clippy::type_complexity)]
-    pub(crate) handler: Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootEventLoopWindowTarget)>,
-    pub(crate) event_loop: RootEventLoopWindowTarget,
+    pub(crate) handler: Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootActiveEventLoop)>,
+    pub(crate) event_loop: RootActiveEventLoop,
 }
 
 impl fmt::Debug for EventLoopHandler {
@@ -92,14 +92,16 @@ enum UserCallbackTransitionResult<'a> {
     },
 }
 
-fn is_redraw(event: &Event<HandlePendingUserEvents>) -> bool {
-    matches!(
-        event,
-        Event::WindowEvent {
-            event: WindowEvent::RedrawRequested,
-            ..
-        }
-    )
+impl Event<HandlePendingUserEvents> {
+    fn is_redraw(&self) -> bool {
+        matches!(
+            self,
+            Event::WindowEvent {
+                event: WindowEvent::RedrawRequested,
+                ..
+            }
+        )
+    }
 }
 
 // this is the state machine for the app lifecycle
@@ -548,7 +550,7 @@ pub fn did_finish_launching(mtm: MainThreadMarker) {
         //
         // relevant iOS log:
         // ```
-        // [ApplicationLifecycle] Windows were created before application initialzation
+        // [ApplicationLifecycle] Windows were created before application initialization
         // completed. This may result in incorrect visual appearance.
         // ```
         let screen = window.screen();
@@ -619,10 +621,10 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
     for wrapper in events {
         match wrapper {
             EventWrapper::StaticEvent(event) => {
-                if !processing_redraws && is_redraw(&event) {
-                    log::info!("processing `RedrawRequested` during the main event loop");
-                } else if processing_redraws && !is_redraw(&event) {
-                    log::warn!(
+                if !processing_redraws && event.is_redraw() {
+                    tracing::info!("processing `RedrawRequested` during the main event loop");
+                } else if processing_redraws && !event.is_redraw() {
+                    tracing::warn!(
                         "processing non `RedrawRequested` event after the main event loop: {:#?}",
                         event
                     );
@@ -673,10 +675,10 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
         for wrapper in queued_events {
             match wrapper {
                 EventWrapper::StaticEvent(event) => {
-                    if !processing_redraws && is_redraw(&event) {
-                        log::info!("processing `RedrawRequested` during the main event loop");
-                    } else if processing_redraws && !is_redraw(&event) {
-                        log::warn!(
+                    if !processing_redraws && event.is_redraw() {
+                        tracing::info!("processing `RedrawRequested` during the main event loop");
+                    } else if processing_redraws && !event.is_redraw() {
+                        tracing::warn!(
                             "processing non-`RedrawRequested` event after the main event loop: {:#?}",
                             event
                         );
@@ -765,7 +767,7 @@ pub fn handle_main_events_cleared(mtm: MainThreadMarker) {
         .into_iter()
         .map(|window| {
             EventWrapper::StaticEvent(Event::WindowEvent {
-                window_id: window.id(),
+                window_id: RootWindowId(window.id()),
                 event: WindowEvent::RedrawRequested,
             })
         })
@@ -796,7 +798,7 @@ fn handle_hidpi_proxy(handler: &mut EventLoopHandler, event: ScaleFactorChanged)
     } = event;
     let new_inner_size = Arc::new(Mutex::new(suggested_size));
     let event = Event::WindowEvent {
-        window_id: window.id(),
+        window_id: RootWindowId(window.id()),
         event: WindowEvent::ScaleFactorChanged {
             scale_factor,
             inner_size_writer: InnerSizeWriter::new(Arc::downgrade(&new_inner_size)),
@@ -899,17 +901,17 @@ macro_rules! os_capabilities {
             os_version: NSOperatingSystemVersion,
         }
 
-        impl From<NSOperatingSystemVersion> for OSCapabilities {
-            fn from(os_version: NSOperatingSystemVersion) -> OSCapabilities {
+        impl OSCapabilities {
+            fn from_os_version(os_version: NSOperatingSystemVersion) -> Self {
                 $(let $name = meets_requirements(os_version, $major, $minor);)*
-                OSCapabilities { $($name,)* os_version, }
+                Self { $($name,)* os_version, }
             }
         }
 
         impl OSCapabilities {$(
             $(#[$attr])*
             pub fn $error_name(&self, extra_msg: &str) {
-                log::warn!(
+                tracing::warn!(
                     concat!("`", $objc_call, "` requires iOS {}.{}+. This device is running iOS {}.{}.{}. {}"),
                     $major, $minor, self.os_version.majorVersion, self.os_version.minorVersion, self.os_version.patchVersion,
                     extra_msg
@@ -947,25 +949,29 @@ fn meets_requirements(
     (version.majorVersion, version.minorVersion) >= (required_major, required_minor)
 }
 
-pub fn os_capabilities() -> OSCapabilities {
-    static OS_CAPABILITIES: Lazy<OSCapabilities> = Lazy::new(|| {
-        let version: NSOperatingSystemVersion = unsafe {
-            let process_info = NSProcessInfo::processInfo();
-            let atleast_ios_8: bool = msg_send![
-                &process_info,
-                respondsToSelector: sel!(operatingSystemVersion)
-            ];
-            // winit requires atleast iOS 8 because no one has put the time into supporting earlier os versions.
-            // Older iOS versions are increasingly difficult to test. For example, Xcode 11 does not support
-            // debugging on devices with an iOS version of less than 8. Another example, in order to use an iOS
-            // simulator older than iOS 8, you must download an older version of Xcode (<9), and at least Xcode 7
-            // has been tested to not even run on macOS 10.15 - Xcode 8 might?
-            //
-            // The minimum required iOS version is likely to grow in the future.
-            assert!(atleast_ios_8, "`winit` requires iOS version 8 or greater");
-            process_info.operatingSystemVersion()
-        };
-        version.into()
-    });
-    OS_CAPABILITIES.clone()
+fn get_version() -> NSOperatingSystemVersion {
+    unsafe {
+        let process_info = NSProcessInfo::processInfo();
+        let atleast_ios_8: bool = msg_send![
+            &process_info,
+            respondsToSelector: sel!(operatingSystemVersion)
+        ];
+        // winit requires atleast iOS 8 because no one has put the time into supporting earlier os versions.
+        // Older iOS versions are increasingly difficult to test. For example, Xcode 11 does not support
+        // debugging on devices with an iOS version of less than 8. Another example, in order to use an iOS
+        // simulator older than iOS 8, you must download an older version of Xcode (<9), and at least Xcode 7
+        // has been tested to not even run on macOS 10.15 - Xcode 8 might?
+        //
+        // The minimum required iOS version is likely to grow in the future.
+        assert!(atleast_ios_8, "`winit` requires iOS version 8 or greater");
+        process_info.operatingSystemVersion()
+    }
+}
+
+pub fn os_capabilities() -> OSCapabilities {
+    // Cache the version lookup for efficiency
+    static OS_CAPABILITIES: OnceLock<OSCapabilities> = OnceLock::new();
+    OS_CAPABILITIES
+        .get_or_init(|| OSCapabilities::from_os_version(get_version()))
+        .clone()
 }

src/platform_impl/ios/event_loop.rs

@@ -20,25 +20,33 @@ use crate::{
     error::EventLoopError,
     event::Event,
     event_loop::{
-        ControlFlow, DeviceEvents, EventLoopClosed,
-        EventLoopWindowTarget as RootEventLoopWindowTarget,
+        ActiveEventLoop as RootActiveEventLoop, ControlFlow, DeviceEvents, EventLoopClosed,
     },
     platform::ios::Idiom,
     platform_impl::platform::app_state::{EventLoopHandler, HandlePendingUserEvents},
+    window::{CustomCursor, CustomCursorSource},
 };
 
-use super::{app_state, monitor, view, MonitorHandle};
+use super::{app_delegate::AppDelegate, uikit::UIUserInterfaceIdiom};
+use super::{app_state, monitor, MonitorHandle};
 use super::{
     app_state::AppState,
     uikit::{UIApplication, UIApplicationMain, UIDevice, UIScreen},
 };
 
 #[derive(Debug)]
-pub struct EventLoopWindowTarget {
+pub struct ActiveEventLoop {
     pub(super) mtm: MainThreadMarker,
 }
 
-impl EventLoopWindowTarget {
+impl ActiveEventLoop {
+    pub fn create_custom_cursor(&self, source: CustomCursorSource) -> CustomCursor {
+        let _ = source.inner;
+        CustomCursor {
+            inner: super::PlatformCustomCursor,
+        }
+    }
+
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         monitor::uiscreens(self.mtm)
     }
@@ -76,8 +84,8 @@ impl EventLoopWindowTarget {
 
     pub(crate) fn exit(&self) {
         // https://developer.apple.com/library/archive/qa/qa1561/_index.html
-        // it is not possible to quit an iOS app gracefully and programatically
-        log::warn!("`ControlFlow::Exit` ignored on iOS");
+        // it is not possible to quit an iOS app gracefully and programmatically
+        tracing::warn!("`ControlFlow::Exit` ignored on iOS");
     }
 
     pub(crate) fn exiting(&self) -> bool {
@@ -109,9 +117,9 @@ impl OwnedDisplayHandle {
 }
 
 fn map_user_event<T: 'static>(
-    mut handler: impl FnMut(Event<T>, &RootEventLoopWindowTarget),
+    mut handler: impl FnMut(Event<T>, &RootActiveEventLoop),
     receiver: mpsc::Receiver<T>,
-) -> impl FnMut(Event<HandlePendingUserEvents>, &RootEventLoopWindowTarget) {
+) -> impl FnMut(Event<HandlePendingUserEvents>, &RootActiveEventLoop) {
     move |event, window_target| match event.map_nonuser_event() {
         Ok(event) => (handler)(event, window_target),
         Err(_) => {
@@ -126,7 +134,7 @@ pub struct EventLoop<T: 'static> {
     mtm: MainThreadMarker,
     sender: Sender<T>,
     receiver: Receiver<T>,
-    window_target: RootEventLoopWindowTarget,
+    window_target: RootActiveEventLoop,
 }
 
 #[derive(Default, Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -158,8 +166,8 @@ impl<T: 'static> EventLoop<T> {
             mtm,
             sender,
             receiver,
-            window_target: RootEventLoopWindowTarget {
-                p: EventLoopWindowTarget { mtm },
+            window_target: RootActiveEventLoop {
+                p: ActiveEventLoop { mtm },
                 _marker: PhantomData,
             },
         })
@@ -167,22 +175,22 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn run<F>(self, handler: F) -> !
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget),
+        F: FnMut(Event<T>, &RootActiveEventLoop),
     {
         let application = UIApplication::shared(self.mtm);
         assert!(
             application.is_none(),
             "\
                 `EventLoop` cannot be `run` after a call to `UIApplicationMain` on iOS\n\
-                 Note: `EventLoop::run` calls `UIApplicationMain` on iOS",
+                 Note: `EventLoop::run_app` calls `UIApplicationMain` on iOS",
         );
 
         let handler = map_user_event(handler, self.receiver);
 
         let handler = unsafe {
             std::mem::transmute::<
-                Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootEventLoopWindowTarget)>,
-                Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootEventLoopWindowTarget)>,
+                Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootActiveEventLoop)>,
+                Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootActiveEventLoop)>,
             >(Box::new(handler))
         };
 
@@ -194,14 +202,14 @@ impl<T: 'static> EventLoop<T> {
         app_state::will_launch(self.mtm, handler);
 
         // Ensure application delegate is initialized
-        view::WinitApplicationDelegate::class();
+        let _ = AppDelegate::class();
 
         unsafe {
             UIApplicationMain(
                 0,
                 ptr::null(),
                 None,
-                Some(&NSString::from_str("WinitApplicationDelegate")),
+                Some(&NSString::from_str(AppDelegate::NAME)),
             )
         };
         unreachable!()
@@ -211,7 +219,7 @@ impl<T: 'static> EventLoop<T> {
         EventLoopProxy::new(self.sender.clone())
     }
 
-    pub fn window_target(&self) -> &RootEventLoopWindowTarget {
+    pub fn window_target(&self) -> &RootActiveEventLoop {
         &self.window_target
     }
 }
@@ -219,7 +227,14 @@ impl<T: 'static> EventLoop<T> {
 // EventLoopExtIOS
 impl<T: 'static> EventLoop<T> {
     pub fn idiom(&self) -> Idiom {
-        UIDevice::current(self.mtm).userInterfaceIdiom().into()
+        match UIDevice::current(self.mtm).userInterfaceIdiom() {
+            UIUserInterfaceIdiom::Unspecified => Idiom::Unspecified,
+            UIUserInterfaceIdiom::Phone => Idiom::Phone,
+            UIUserInterfaceIdiom::Pad => Idiom::Pad,
+            UIUserInterfaceIdiom::TV => Idiom::TV,
+            UIUserInterfaceIdiom::CarPlay => Idiom::CarPlay,
+            _ => Idiom::Unspecified,
+        }
     }
 }
 
@@ -229,6 +244,7 @@ pub struct EventLoopProxy<T> {
 }
 
 unsafe impl<T: Send> Send for EventLoopProxy<T> {}
+unsafe impl<T: Send> Sync for EventLoopProxy<T> {}
 
 impl<T> Clone for EventLoopProxy<T> {
     fn clone(&self) -> EventLoopProxy<T> {

src/platform_impl/ios/mod.rs

@@ -0,0 +1,55 @@
+#![cfg(ios_platform)]
+#![allow(clippy::let_unit_value)]
+
+mod app_delegate;
+mod app_state;
+mod event_loop;
+mod monitor;
+mod uikit;
+mod view;
+mod view_controller;
+mod window;
+
+use std::fmt;
+
+use crate::event::DeviceId as RootDeviceId;
+
+pub(crate) use self::{
+    event_loop::{
+        ActiveEventLoop, EventLoop, EventLoopProxy, OwnedDisplayHandle,
+        PlatformSpecificEventLoopAttributes,
+    },
+    monitor::{MonitorHandle, VideoModeHandle},
+    window::{PlatformSpecificWindowAttributes, Window, WindowId},
+};
+pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursor;
+pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursorSource;
+pub(crate) use crate::icon::NoIcon as PlatformIcon;
+pub(crate) use crate::platform_impl::Fullscreen;
+
+/// There is no way to detect which device that performed a certain event in
+/// UIKit (i.e. you can't differentiate between different external keyboards,
+/// or whether it was the main touchscreen, assistive technologies, or some
+/// other pointer device that caused a touch event).
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct DeviceId;
+
+impl DeviceId {
+    pub const unsafe fn dummy() -> Self {
+        DeviceId
+    }
+}
+
+pub(crate) const DEVICE_ID: RootDeviceId = RootDeviceId(DeviceId);
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct KeyEventExtra {}
+
+#[derive(Debug)]
+pub enum OsError {}
+
+impl fmt::Display for OsError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "os error")
+    }
+}

src/platform_impl/ios/uikit/device.rs

@@ -0,0 +1,41 @@
+use icrate::Foundation::{MainThreadMarker, NSInteger, NSObject};
+use objc2::encode::{Encode, Encoding};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct UIDevice;
+
+    unsafe impl ClassType for UIDevice {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl UIDevice {
+        pub fn current(_mtm: MainThreadMarker) -> Id<Self> {
+            unsafe { msg_send_id![Self::class(), currentDevice] }
+        }
+
+        #[method(userInterfaceIdiom)]
+        pub fn userInterfaceIdiom(&self) -> UIUserInterfaceIdiom;
+    }
+);
+
+#[repr(transparent)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct UIUserInterfaceIdiom(NSInteger);
+
+unsafe impl Encode for UIUserInterfaceIdiom {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}
+
+impl UIUserInterfaceIdiom {
+    pub const Unspecified: UIUserInterfaceIdiom = UIUserInterfaceIdiom(-1);
+    pub const Phone: UIUserInterfaceIdiom = UIUserInterfaceIdiom(0);
+    pub const Pad: UIUserInterfaceIdiom = UIUserInterfaceIdiom(1);
+    pub const TV: UIUserInterfaceIdiom = UIUserInterfaceIdiom(2);
+    pub const CarPlay: UIUserInterfaceIdiom = UIUserInterfaceIdiom(3);
+}

src/platform_impl/ios/uikit/geometry.rs

@@ -0,0 +1,14 @@
+use icrate::Foundation::NSUInteger;
+use objc2::encode::{Encode, Encoding};
+
+#[repr(transparent)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct UIRectEdge(pub NSUInteger);
+
+impl UIRectEdge {
+    pub const NONE: Self = Self(0);
+}
+
+unsafe impl Encode for UIRectEdge {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}

src/platform_impl/ios/uikit/mod.rs

@@ -9,6 +9,7 @@ mod application;
 mod coordinate_space;
 mod device;
 mod event;
+mod geometry;
 mod gesture_recognizer;
 mod responder;
 mod screen;
@@ -22,8 +23,9 @@ mod window;
 
 pub(crate) use self::application::UIApplication;
 pub(crate) use self::coordinate_space::UICoordinateSpace;
-pub(crate) use self::device::UIDevice;
+pub(crate) use self::device::{UIDevice, UIUserInterfaceIdiom};
 pub(crate) use self::event::UIEvent;
+pub(crate) use self::geometry::UIRectEdge;
 pub(crate) use self::gesture_recognizer::{
     UIGestureRecognizer, UIGestureRecognizerState, UIPinchGestureRecognizer,
     UIRotationGestureRecognizer, UITapGestureRecognizer,

src/platform_impl/ios/uikit/status_bar_style.rs

@@ -1,4 +1,3 @@
-use crate::platform::ios::StatusBarStyle;
 use icrate::Foundation::NSInteger;
 use objc2::encode::{Encode, Encoding};
 
@@ -12,16 +11,6 @@ pub enum UIStatusBarStyle {
     DarkContent = 3,
 }
 
-impl From<StatusBarStyle> for UIStatusBarStyle {
-    fn from(value: StatusBarStyle) -> Self {
-        match value {
-            StatusBarStyle::Default => Self::Default,
-            StatusBarStyle::LightContent => Self::LightContent,
-            StatusBarStyle::DarkContent => Self::DarkContent,
-        }
-    }
-}
-
 unsafe impl Encode for UIStatusBarStyle {
     const ENCODING: Encoding = NSInteger::ENCODING;
 }

src/platform_impl/ios/view.rs

@@ -1,7 +1,7 @@
 #![allow(clippy::unnecessary_cast)]
-use std::cell::{Cell, RefCell};
+use std::cell::RefCell;
 
-use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSObjectProtocol, NSSet};
+use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSSet};
 use objc2::rc::Id;
 use objc2::runtime::AnyClass;
 use objc2::{
@@ -10,20 +10,16 @@ use objc2::{
 
 use super::app_state::{self, EventWrapper};
 use super::uikit::{
-    UIApplication, UIDevice, UIEvent, UIForceTouchCapability, UIGestureRecognizerState,
-    UIInterfaceOrientationMask, UIPinchGestureRecognizer, UIResponder, UIRotationGestureRecognizer,
-    UIStatusBarStyle, UITapGestureRecognizer, UITouch, UITouchPhase, UITouchType,
-    UITraitCollection, UIView, UIViewController, UIWindow,
+    UIEvent, UIForceTouchCapability, UIGestureRecognizerState, UIPinchGestureRecognizer,
+    UIResponder, UIRotationGestureRecognizer, UITapGestureRecognizer, UITouch, UITouchPhase,
+    UITouchType, UITraitCollection, UIView,
 };
+use super::window::WinitUIWindow;
 use crate::{
     dpi::PhysicalPosition,
     event::{Event, Force, Touch, TouchPhase, WindowEvent},
-    platform::ios::ValidOrientations,
-    platform_impl::platform::{
-        ffi::{UIRectEdge, UIUserInterfaceIdiom},
-        Fullscreen, DEVICE_ID,
-    },
-    window::{WindowAttributes, WindowId},
+    platform_impl::platform::DEVICE_ID,
+    window::{WindowAttributes, WindowId as RootWindowId},
 };
 
 pub struct WinitViewState {
@@ -54,7 +50,7 @@ declare_class!(
             app_state::handle_nonuser_event(
                 mtm,
                 EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: window.id(),
+                    window_id: RootWindowId(window.id()),
                     event: WindowEvent::RedrawRequested,
                 }),
             );
@@ -89,7 +85,7 @@ declare_class!(
             app_state::handle_nonuser_event(
                 mtm,
                 EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: window.id(),
+                    window_id: RootWindowId(window.id()),
                     event: WindowEvent::Resized(size),
                 }),
             );
@@ -128,7 +124,7 @@ declare_class!(
                 width: screen_frame.size.width as f64,
                 height: screen_frame.size.height as f64,
             };
-            let window_id = window.id();
+            let window_id = RootWindowId(window.id());
             app_state::handle_nonuser_events(
                 mtm,
                 std::iter::once(EventWrapper::ScaleFactorChanged(
@@ -182,7 +178,7 @@ declare_class!(
             };
 
             let gesture_event = EventWrapper::StaticEvent(Event::WindowEvent {
-                window_id: window.id(),
+                window_id: RootWindowId(window.id()),
                 event: WindowEvent::PinchGesture {
                     device_id: DEVICE_ID,
                     delta: recognizer.velocity() as _,
@@ -200,7 +196,7 @@ declare_class!(
 
             if recognizer.state() == UIGestureRecognizerState::Ended {
                 let gesture_event = EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: window.id(),
+                    window_id: RootWindowId(window.id()),
                     event: WindowEvent::DoubleTapGesture {
                         device_id: DEVICE_ID,
                     },
@@ -228,7 +224,7 @@ declare_class!(
             // Flip the velocity to match macOS.
             let delta = -recognizer.velocity() as _;
             let gesture_event = EventWrapper::StaticEvent(Event::WindowEvent {
-                window_id: window.id(),
+                window_id: RootWindowId(window.id()),
                 event: WindowEvent::RotationGesture {
                     device_id: DEVICE_ID,
                     delta,
@@ -379,7 +375,7 @@ impl WinitView {
                 )
             };
             touch_events.push(EventWrapper::StaticEvent(Event::WindowEvent {
-                window_id: window.id(),
+                window_id: RootWindowId(window.id()),
                 event: WindowEvent::Touch(Touch {
                     device_id: DEVICE_ID,
                     id: touch_id,
@@ -393,339 +389,3 @@ impl WinitView {
         app_state::handle_nonuser_events(mtm, touch_events);
     }
 }
-
-pub struct ViewControllerState {
-    prefers_status_bar_hidden: Cell<bool>,
-    preferred_status_bar_style: Cell<UIStatusBarStyle>,
-    prefers_home_indicator_auto_hidden: Cell<bool>,
-    supported_orientations: Cell<UIInterfaceOrientationMask>,
-    preferred_screen_edges_deferring_system_gestures: Cell<UIRectEdge>,
-}
-
-declare_class!(
-    pub(crate) struct WinitViewController;
-
-    unsafe impl ClassType for WinitViewController {
-        #[inherits(UIResponder, NSObject)]
-        type Super = UIViewController;
-        type Mutability = mutability::InteriorMutable;
-        const NAME: &'static str = "WinitUIViewController";
-    }
-
-    impl DeclaredClass for WinitViewController {
-        type Ivars = ViewControllerState;
-    }
-
-    unsafe impl WinitViewController {
-        #[method(shouldAutorotate)]
-        fn should_autorotate(&self) -> bool {
-            true
-        }
-
-        #[method(prefersStatusBarHidden)]
-        fn prefers_status_bar_hidden(&self) -> bool {
-            self.ivars().prefers_status_bar_hidden.get()
-        }
-
-        #[method(preferredStatusBarStyle)]
-        fn preferred_status_bar_style(&self) -> UIStatusBarStyle {
-            self.ivars().preferred_status_bar_style.get()
-        }
-
-        #[method(prefersHomeIndicatorAutoHidden)]
-        fn prefers_home_indicator_auto_hidden(&self) -> bool {
-            self.ivars().prefers_home_indicator_auto_hidden.get()
-        }
-
-        #[method(supportedInterfaceOrientations)]
-        fn supported_orientations(&self) -> UIInterfaceOrientationMask {
-            self.ivars().supported_orientations.get()
-        }
-
-        #[method(preferredScreenEdgesDeferringSystemGestures)]
-        fn preferred_screen_edges_deferring_system_gestures(&self) -> UIRectEdge {
-            self.ivars()
-                .preferred_screen_edges_deferring_system_gestures
-                .get()
-        }
-    }
-);
-
-impl WinitViewController {
-    pub(crate) fn set_prefers_status_bar_hidden(&self, val: bool) {
-        self.ivars().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.setNeedsStatusBarAppearanceUpdate();
-    }
-
-    pub(crate) fn set_prefers_home_indicator_auto_hidden(&self, val: bool) {
-        self.ivars().prefers_home_indicator_auto_hidden.set(val);
-        let os_capabilities = app_state::os_capabilities();
-        if os_capabilities.home_indicator_hidden {
-            self.setNeedsUpdateOfHomeIndicatorAutoHidden();
-        } else {
-            os_capabilities.home_indicator_hidden_err_msg("ignoring")
-        }
-    }
-
-    pub(crate) fn set_preferred_screen_edges_deferring_system_gestures(&self, val: UIRectEdge) {
-        self.ivars()
-            .preferred_screen_edges_deferring_system_gestures
-            .set(val);
-        let os_capabilities = app_state::os_capabilities();
-        if os_capabilities.defer_system_gestures {
-            self.setNeedsUpdateOfScreenEdgesDeferringSystemGestures();
-        } else {
-            os_capabilities.defer_system_gestures_err_msg("ignoring")
-        }
-    }
-
-    pub(crate) fn set_supported_interface_orientations(
-        &self,
-        mtm: MainThreadMarker,
-        valid_orientations: ValidOrientations,
-    ) {
-        let mask = match (
-            valid_orientations,
-            UIDevice::current(mtm).userInterfaceIdiom(),
-        ) {
-            (ValidOrientations::LandscapeAndPortrait, UIUserInterfaceIdiom::Phone) => {
-                UIInterfaceOrientationMask::AllButUpsideDown
-            }
-            (ValidOrientations::LandscapeAndPortrait, _) => UIInterfaceOrientationMask::All,
-            (ValidOrientations::Landscape, _) => UIInterfaceOrientationMask::Landscape,
-            (ValidOrientations::Portrait, UIUserInterfaceIdiom::Phone) => {
-                UIInterfaceOrientationMask::Portrait
-            }
-            (ValidOrientations::Portrait, _) => {
-                UIInterfaceOrientationMask::Portrait
-                    | UIInterfaceOrientationMask::PortraitUpsideDown
-            }
-        };
-        self.ivars().supported_orientations.set(mask);
-        UIViewController::attemptRotationToDeviceOrientation();
-    }
-
-    pub(crate) fn new(
-        mtm: MainThreadMarker,
-        window_attributes: &WindowAttributes,
-        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] };
-
-        this.set_prefers_status_bar_hidden(
-            window_attributes
-                .platform_specific
-                .prefers_status_bar_hidden,
-        );
-
-        this.set_preferred_status_bar_style(
-            window_attributes
-                .platform_specific
-                .preferred_status_bar_style
-                .into(),
-        );
-
-        this.set_supported_interface_orientations(
-            mtm,
-            window_attributes.platform_specific.valid_orientations,
-        );
-
-        this.set_prefers_home_indicator_auto_hidden(
-            window_attributes
-                .platform_specific
-                .prefers_home_indicator_hidden,
-        );
-
-        this.set_preferred_screen_edges_deferring_system_gestures(
-            window_attributes
-                .platform_specific
-                .preferred_screen_edges_deferring_system_gestures
-                .into(),
-        );
-
-        this.setView(Some(view));
-
-        this
-    }
-}
-
-declare_class!(
-    #[derive(Debug, PartialEq, Eq, Hash)]
-    pub(crate) struct WinitUIWindow;
-
-    unsafe impl ClassType for WinitUIWindow {
-        #[inherits(UIResponder, NSObject)]
-        type Super = UIWindow;
-        type Mutability = mutability::InteriorMutable;
-        const NAME: &'static str = "WinitUIWindow";
-    }
-
-    impl DeclaredClass for WinitUIWindow {}
-
-    unsafe impl WinitUIWindow {
-        #[method(becomeKeyWindow)]
-        fn become_key_window(&self) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(
-                mtm,
-                EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: self.id(),
-                    event: WindowEvent::Focused(true),
-                }),
-            );
-            let _: () = unsafe { msg_send![super(self), becomeKeyWindow] };
-        }
-
-        #[method(resignKeyWindow)]
-        fn resign_key_window(&self) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(
-                mtm,
-                EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: self.id(),
-                    event: WindowEvent::Focused(false),
-                }),
-            );
-            let _: () = unsafe { msg_send![super(self), resignKeyWindow] };
-        }
-    }
-);
-
-impl WinitUIWindow {
-    pub(crate) fn new(
-        mtm: MainThreadMarker,
-        window_attributes: &WindowAttributes,
-        frame: CGRect,
-        view_controller: &UIViewController,
-    ) -> Id<Self> {
-        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), initWithFrame: frame] };
-
-        this.setRootViewController(Some(view_controller));
-
-        match window_attributes.fullscreen.clone().map(Into::into) {
-            Some(Fullscreen::Exclusive(ref video_mode)) => {
-                let monitor = video_mode.monitor();
-                let screen = monitor.ui_screen(mtm);
-                screen.setCurrentMode(Some(video_mode.screen_mode(mtm)));
-                this.setScreen(screen);
-            }
-            Some(Fullscreen::Borderless(Some(ref monitor))) => {
-                let screen = monitor.ui_screen(mtm);
-                this.setScreen(screen);
-            }
-            _ => (),
-        }
-
-        this
-    }
-
-    pub(crate) fn id(&self) -> WindowId {
-        (self as *const Self as usize as u64).into()
-    }
-}
-
-declare_class!(
-    pub struct WinitApplicationDelegate;
-
-    unsafe impl ClassType for WinitApplicationDelegate {
-        type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
-        const NAME: &'static str = "WinitApplicationDelegate";
-    }
-
-    impl DeclaredClass for WinitApplicationDelegate {}
-
-    // UIApplicationDelegate protocol
-    unsafe impl WinitApplicationDelegate {
-        #[method(application:didFinishLaunchingWithOptions:)]
-        fn did_finish_launching(&self, _application: &UIApplication, _: *mut NSObject) -> bool {
-            app_state::did_finish_launching(MainThreadMarker::new().unwrap());
-            true
-        }
-
-        #[method(applicationDidBecomeActive:)]
-        fn did_become_active(&self, _application: &UIApplication) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Resumed))
-        }
-
-        #[method(applicationWillResignActive:)]
-        fn will_resign_active(&self, _application: &UIApplication) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Suspended))
-        }
-
-        #[method(applicationWillEnterForeground:)]
-        fn will_enter_foreground(&self, application: &UIApplication) {
-            self.send_occluded_event_for_all_windows(application, false);
-        }
-
-        #[method(applicationDidEnterBackground:)]
-        fn did_enter_background(&self, application: &UIApplication) {
-            self.send_occluded_event_for_all_windows(application, true);
-        }
-
-        #[method(applicationWillTerminate:)]
-        fn will_terminate(&self, application: &UIApplication) {
-            let mut events = Vec::new();
-            for window in application.windows().iter() {
-                if window.is_kind_of::<WinitUIWindow>() {
-                    // SAFETY: We just checked that the window is a `winit` window
-                    let window = unsafe {
-                        let ptr: *const UIWindow = window;
-                        let ptr: *const WinitUIWindow = ptr.cast();
-                        &*ptr
-                    };
-                    events.push(EventWrapper::StaticEvent(Event::WindowEvent {
-                        window_id: window.id(),
-                        event: WindowEvent::Destroyed,
-                    }));
-                }
-            }
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_events(mtm, events);
-            app_state::terminated(mtm);
-        }
-
-        #[method(applicationDidReceiveMemoryWarning:)]
-        fn did_receive_memory_warning(&self, _application: &UIApplication) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::MemoryWarning))
-        }
-    }
-);
-
-impl WinitApplicationDelegate {
-    fn send_occluded_event_for_all_windows(&self, application: &UIApplication, occluded: bool) {
-        let mut events = Vec::new();
-        for window in application.windows().iter() {
-            if window.is_kind_of::<WinitUIWindow>() {
-                // SAFETY: We just checked that the window is a `winit` window
-                let window = unsafe {
-                    let ptr: *const UIWindow = window;
-                    let ptr: *const WinitUIWindow = ptr.cast();
-                    &*ptr
-                };
-                events.push(EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: window.id(),
-                    event: WindowEvent::Occluded(occluded),
-                }));
-            }
-        }
-        let mtm = MainThreadMarker::new().unwrap();
-        app_state::handle_nonuser_events(mtm, events);
-    }
-}

src/platform_impl/ios/view_controller.rs

@@ -0,0 +1,192 @@
+use std::cell::Cell;
+
+use icrate::Foundation::{MainThreadMarker, NSObject};
+use objc2::rc::Id;
+use objc2::{declare_class, msg_send_id, mutability, ClassType, DeclaredClass};
+
+use super::app_state::{self};
+use super::uikit::{
+    UIDevice, UIInterfaceOrientationMask, UIRectEdge, UIResponder, UIStatusBarStyle,
+    UIUserInterfaceIdiom, UIView, UIViewController,
+};
+use crate::platform::ios::{ScreenEdge, StatusBarStyle};
+use crate::{platform::ios::ValidOrientations, window::WindowAttributes};
+
+pub struct ViewControllerState {
+    prefers_status_bar_hidden: Cell<bool>,
+    preferred_status_bar_style: Cell<UIStatusBarStyle>,
+    prefers_home_indicator_auto_hidden: Cell<bool>,
+    supported_orientations: Cell<UIInterfaceOrientationMask>,
+    preferred_screen_edges_deferring_system_gestures: Cell<UIRectEdge>,
+}
+
+declare_class!(
+    pub(crate) struct WinitViewController;
+
+    unsafe impl ClassType for WinitViewController {
+        #[inherits(UIResponder, NSObject)]
+        type Super = UIViewController;
+        type Mutability = mutability::InteriorMutable;
+        const NAME: &'static str = "WinitUIViewController";
+    }
+
+    impl DeclaredClass for WinitViewController {
+        type Ivars = ViewControllerState;
+    }
+
+    unsafe impl WinitViewController {
+        #[method(shouldAutorotate)]
+        fn should_autorotate(&self) -> bool {
+            true
+        }
+
+        #[method(prefersStatusBarHidden)]
+        fn prefers_status_bar_hidden(&self) -> bool {
+            self.ivars().prefers_status_bar_hidden.get()
+        }
+
+        #[method(preferredStatusBarStyle)]
+        fn preferred_status_bar_style(&self) -> UIStatusBarStyle {
+            self.ivars().preferred_status_bar_style.get()
+        }
+
+        #[method(prefersHomeIndicatorAutoHidden)]
+        fn prefers_home_indicator_auto_hidden(&self) -> bool {
+            self.ivars().prefers_home_indicator_auto_hidden.get()
+        }
+
+        #[method(supportedInterfaceOrientations)]
+        fn supported_orientations(&self) -> UIInterfaceOrientationMask {
+            self.ivars().supported_orientations.get()
+        }
+
+        #[method(preferredScreenEdgesDeferringSystemGestures)]
+        fn preferred_screen_edges_deferring_system_gestures(&self) -> UIRectEdge {
+            self.ivars()
+                .preferred_screen_edges_deferring_system_gestures
+                .get()
+        }
+    }
+);
+
+impl WinitViewController {
+    pub(crate) fn set_prefers_status_bar_hidden(&self, val: bool) {
+        self.ivars().prefers_status_bar_hidden.set(val);
+        self.setNeedsStatusBarAppearanceUpdate();
+    }
+
+    pub(crate) fn set_preferred_status_bar_style(&self, val: StatusBarStyle) {
+        let val = match val {
+            StatusBarStyle::Default => UIStatusBarStyle::Default,
+            StatusBarStyle::LightContent => UIStatusBarStyle::LightContent,
+            StatusBarStyle::DarkContent => UIStatusBarStyle::DarkContent,
+        };
+        self.ivars().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);
+        let os_capabilities = app_state::os_capabilities();
+        if os_capabilities.home_indicator_hidden {
+            self.setNeedsUpdateOfHomeIndicatorAutoHidden();
+        } else {
+            os_capabilities.home_indicator_hidden_err_msg("ignoring")
+        }
+    }
+
+    pub(crate) fn set_preferred_screen_edges_deferring_system_gestures(&self, val: ScreenEdge) {
+        let val = {
+            assert_eq!(
+                val.bits() & !ScreenEdge::ALL.bits(),
+                0,
+                "invalid `ScreenEdge`"
+            );
+            UIRectEdge(val.bits().into())
+        };
+        self.ivars()
+            .preferred_screen_edges_deferring_system_gestures
+            .set(val);
+        let os_capabilities = app_state::os_capabilities();
+        if os_capabilities.defer_system_gestures {
+            self.setNeedsUpdateOfScreenEdgesDeferringSystemGestures();
+        } else {
+            os_capabilities.defer_system_gestures_err_msg("ignoring")
+        }
+    }
+
+    pub(crate) fn set_supported_interface_orientations(
+        &self,
+        mtm: MainThreadMarker,
+        valid_orientations: ValidOrientations,
+    ) {
+        let mask = match (
+            valid_orientations,
+            UIDevice::current(mtm).userInterfaceIdiom(),
+        ) {
+            (ValidOrientations::LandscapeAndPortrait, UIUserInterfaceIdiom::Phone) => {
+                UIInterfaceOrientationMask::AllButUpsideDown
+            }
+            (ValidOrientations::LandscapeAndPortrait, _) => UIInterfaceOrientationMask::All,
+            (ValidOrientations::Landscape, _) => UIInterfaceOrientationMask::Landscape,
+            (ValidOrientations::Portrait, UIUserInterfaceIdiom::Phone) => {
+                UIInterfaceOrientationMask::Portrait
+            }
+            (ValidOrientations::Portrait, _) => {
+                UIInterfaceOrientationMask::Portrait
+                    | UIInterfaceOrientationMask::PortraitUpsideDown
+            }
+        };
+        self.ivars().supported_orientations.set(mask);
+        UIViewController::attemptRotationToDeviceOrientation();
+    }
+
+    pub(crate) fn new(
+        mtm: MainThreadMarker,
+        window_attributes: &WindowAttributes,
+        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] };
+
+        this.set_prefers_status_bar_hidden(
+            window_attributes
+                .platform_specific
+                .prefers_status_bar_hidden,
+        );
+
+        this.set_preferred_status_bar_style(
+            window_attributes
+                .platform_specific
+                .preferred_status_bar_style,
+        );
+
+        this.set_supported_interface_orientations(
+            mtm,
+            window_attributes.platform_specific.valid_orientations,
+        );
+
+        this.set_prefers_home_indicator_auto_hidden(
+            window_attributes
+                .platform_specific
+                .prefers_home_indicator_hidden,
+        );
+
+        this.set_preferred_screen_edges_deferring_system_gestures(
+            window_attributes
+                .platform_specific
+                .preferred_screen_edges_deferring_system_gestures,
+        );
+
+        this.setView(Some(view));
+
+        this
+    }
+}

src/platform_impl/ios/window.rs

@@ -3,29 +3,106 @@
 use std::collections::VecDeque;
 
 use icrate::Foundation::{CGFloat, CGPoint, CGRect, CGSize, MainThreadBound, MainThreadMarker};
-use log::{debug, warn};
 use objc2::rc::Id;
-use objc2::{class, msg_send};
+use objc2::runtime::{AnyObject, NSObject};
+use objc2::{class, declare_class, msg_send, msg_send_id, mutability, ClassType, DeclaredClass};
+use tracing::{debug, warn};
 
 use super::app_state::EventWrapper;
-use super::uikit::{UIApplication, UIScreen, UIScreenOverscanCompensation};
-use super::view::{WinitUIWindow, WinitView, WinitViewController};
+use super::uikit::{
+    UIApplication, UIResponder, UIScreen, UIScreenOverscanCompensation, UIViewController, UIWindow,
+};
+use super::view::WinitView;
+use super::view_controller::WinitViewController;
 use crate::{
     cursor::Cursor,
-    dpi::{self, LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize, Position, Size},
+    dpi::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize, Position, Size},
     error::{ExternalError, NotSupportedError, OsError as RootOsError},
     event::{Event, WindowEvent},
     icon::Icon,
     platform::ios::{ScreenEdge, StatusBarStyle, ValidOrientations},
-    platform_impl::platform::{
-        app_state, monitor, EventLoopWindowTarget, Fullscreen, MonitorHandle,
-    },
+    platform_impl::platform::{app_state, monitor, ActiveEventLoop, Fullscreen, MonitorHandle},
     window::{
         CursorGrabMode, ImePurpose, ResizeDirection, Theme, UserAttentionType, WindowAttributes,
-        WindowButtons, WindowId, WindowLevel,
+        WindowButtons, WindowId as RootWindowId, WindowLevel,
     },
 };
 
+declare_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct WinitUIWindow;
+
+    unsafe impl ClassType for WinitUIWindow {
+        #[inherits(UIResponder, NSObject)]
+        type Super = UIWindow;
+        type Mutability = mutability::InteriorMutable;
+        const NAME: &'static str = "WinitUIWindow";
+    }
+
+    impl DeclaredClass for WinitUIWindow {}
+
+    unsafe impl WinitUIWindow {
+        #[method(becomeKeyWindow)]
+        fn become_key_window(&self) {
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(
+                mtm,
+                EventWrapper::StaticEvent(Event::WindowEvent {
+                    window_id: RootWindowId(self.id()),
+                    event: WindowEvent::Focused(true),
+                }),
+            );
+            let _: () = unsafe { msg_send![super(self), becomeKeyWindow] };
+        }
+
+        #[method(resignKeyWindow)]
+        fn resign_key_window(&self) {
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(
+                mtm,
+                EventWrapper::StaticEvent(Event::WindowEvent {
+                    window_id: RootWindowId(self.id()),
+                    event: WindowEvent::Focused(false),
+                }),
+            );
+            let _: () = unsafe { msg_send![super(self), resignKeyWindow] };
+        }
+    }
+);
+
+impl WinitUIWindow {
+    pub(crate) fn new(
+        mtm: MainThreadMarker,
+        window_attributes: &WindowAttributes,
+        frame: CGRect,
+        view_controller: &UIViewController,
+    ) -> Id<Self> {
+        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), initWithFrame: frame] };
+
+        this.setRootViewController(Some(view_controller));
+
+        match window_attributes.fullscreen.clone().map(Into::into) {
+            Some(Fullscreen::Exclusive(ref video_mode)) => {
+                let monitor = video_mode.monitor();
+                let screen = monitor.ui_screen(mtm);
+                screen.setCurrentMode(Some(video_mode.screen_mode(mtm)));
+                this.setScreen(screen);
+            }
+            Some(Fullscreen::Borderless(Some(ref monitor))) => {
+                let screen = monitor.ui_screen(mtm);
+                this.setScreen(screen);
+            }
+            _ => (),
+        }
+
+        this
+    }
+
+    pub(crate) fn id(&self) -> WindowId {
+        (self as *const Self as usize as u64).into()
+    }
+}
+
 pub struct Inner {
     window: Id<WinitUIWindow>,
     view_controller: Id<WinitViewController>,
@@ -398,7 +475,7 @@ pub struct Window {
 
 impl Window {
     pub(crate) fn new(
-        event_loop: &EventLoopWindowTarget,
+        event_loop: &ActiveEventLoop,
         window_attributes: WindowAttributes,
     ) -> Result<Window, RootOsError> {
         let mtm = event_loop.mtm;
@@ -460,11 +537,11 @@ impl Window {
             let screen = window.screen();
             let screen_space = screen.coordinateSpace();
             let screen_frame = view.convertRect_toCoordinateSpace(bounds, &screen_space);
-            let size = crate::dpi::LogicalSize {
+            let size = LogicalSize {
                 width: screen_frame.size.width as f64,
                 height: screen_frame.size.height as f64,
             };
-            let window_id = window.id();
+            let window_id = RootWindowId(window.id());
             app_state::handle_nonuser_events(
                 mtm,
                 std::iter::once(EventWrapper::ScaleFactorChanged(
@@ -551,7 +628,7 @@ impl Inner {
 
     pub fn set_preferred_screen_edges_deferring_system_gestures(&self, edges: ScreenEdge) {
         self.view_controller
-            .set_preferred_screen_edges_deferring_system_gestures(edges.into());
+            .set_preferred_screen_edges_deferring_system_gestures(edges);
     }
 
     pub fn set_prefers_status_bar_hidden(&self, hidden: bool) {
@@ -560,7 +637,7 @@ impl Inner {
 
     pub fn set_preferred_status_bar_style(&self, status_bar_style: StatusBarStyle) {
         self.view_controller
-            .set_preferred_status_bar_style(status_bar_style.into());
+            .set_preferred_status_bar_style(status_bar_style);
     }
 
     pub fn recognize_pinch_gesture(&self, should_recognize: bool) {
@@ -612,7 +689,7 @@ impl Inner {
             let screen_frame = self.rect_to_screen_space(bounds);
             let status_bar_frame = {
                 let app = UIApplication::shared(MainThreadMarker::new().unwrap()).expect(
-                    "`Window::get_inner_position` cannot be called before `EventLoop::run` on iOS",
+                    "`Window::get_inner_position` cannot be called before `EventLoop::run_app` on iOS",
                 );
                 app.statusBarFrame()
             };
@@ -638,8 +715,46 @@ impl Inner {
     }
 }
 
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct WindowId {
+    window: *mut WinitUIWindow,
+}
+
+impl WindowId {
+    pub const unsafe fn dummy() -> Self {
+        WindowId {
+            window: std::ptr::null_mut(),
+        }
+    }
+}
+
+impl From<WindowId> for u64 {
+    fn from(window_id: WindowId) -> Self {
+        window_id.window as u64
+    }
+}
+
+impl From<u64> for WindowId {
+    fn from(raw_id: u64) -> Self {
+        Self {
+            window: raw_id as _,
+        }
+    }
+}
+
+unsafe impl Send for WindowId {}
+unsafe impl Sync for WindowId {}
+
+impl From<&AnyObject> for WindowId {
+    fn from(window: &AnyObject) -> WindowId {
+        WindowId {
+            window: window as *const _ as _,
+        }
+    }
+}
+
 #[derive(Clone, Debug, Default)]
-pub struct PlatformSpecificWindowBuilderAttributes {
+pub struct PlatformSpecificWindowAttributes {
     pub scale_factor: Option<f64>,
     pub valid_orientations: ValidOrientations,
     pub prefers_home_indicator_hidden: bool,

src/platform_impl/linux/common/mod.rs

@@ -0,0 +1 @@
+pub mod xkb;

src/platform_impl/linux/common/xkb/compose.rs

@@ -0,0 +1,124 @@
+//! XKB compose handling.
+
+use std::env;
+use std::ffi::CString;
+use std::ops::Deref;
+use std::os::unix::ffi::OsStringExt;
+use std::ptr::NonNull;
+
+use super::XkbContext;
+use super::XKBCH;
+use smol_str::SmolStr;
+use xkbcommon_dl::{
+    xkb_compose_compile_flags, xkb_compose_feed_result, xkb_compose_state, xkb_compose_state_flags,
+    xkb_compose_status, xkb_compose_table, xkb_keysym_t,
+};
+
+#[derive(Debug)]
+pub struct XkbComposeTable {
+    table: NonNull<xkb_compose_table>,
+}
+
+impl XkbComposeTable {
+    pub fn new(context: &XkbContext) -> Option<Self> {
+        let locale = env::var_os("LC_ALL")
+            .and_then(|v| if v.is_empty() { None } else { Some(v) })
+            .or_else(|| env::var_os("LC_CTYPE"))
+            .and_then(|v| if v.is_empty() { None } else { Some(v) })
+            .or_else(|| env::var_os("LANG"))
+            .and_then(|v| if v.is_empty() { None } else { Some(v) })
+            .unwrap_or_else(|| "C".into());
+        let locale = CString::new(locale.into_vec()).unwrap();
+
+        let table = unsafe {
+            (XKBCH.xkb_compose_table_new_from_locale)(
+                context.as_ptr(),
+                locale.as_ptr(),
+                xkb_compose_compile_flags::XKB_COMPOSE_COMPILE_NO_FLAGS,
+            )
+        };
+
+        let table = NonNull::new(table)?;
+        Some(Self { table })
+    }
+
+    /// Create new state with the given compose table.
+    pub fn new_state(&self) -> Option<XkbComposeState> {
+        let state = unsafe {
+            (XKBCH.xkb_compose_state_new)(
+                self.table.as_ptr(),
+                xkb_compose_state_flags::XKB_COMPOSE_STATE_NO_FLAGS,
+            )
+        };
+
+        let state = NonNull::new(state)?;
+        Some(XkbComposeState { state })
+    }
+}
+
+impl Deref for XkbComposeTable {
+    type Target = NonNull<xkb_compose_table>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.table
+    }
+}
+
+impl Drop for XkbComposeTable {
+    fn drop(&mut self) {
+        unsafe {
+            (XKBCH.xkb_compose_table_unref)(self.table.as_ptr());
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct XkbComposeState {
+    state: NonNull<xkb_compose_state>,
+}
+
+impl XkbComposeState {
+    pub fn get_string(&mut self, scratch_buffer: &mut Vec<u8>) -> Option<SmolStr> {
+        super::make_string_with(scratch_buffer, |ptr, len| unsafe {
+            (XKBCH.xkb_compose_state_get_utf8)(self.state.as_ptr(), ptr, len)
+        })
+    }
+
+    #[inline]
+    pub fn feed(&mut self, keysym: xkb_keysym_t) -> ComposeStatus {
+        let feed_result = unsafe { (XKBCH.xkb_compose_state_feed)(self.state.as_ptr(), keysym) };
+        match feed_result {
+            xkb_compose_feed_result::XKB_COMPOSE_FEED_IGNORED => ComposeStatus::Ignored,
+            xkb_compose_feed_result::XKB_COMPOSE_FEED_ACCEPTED => {
+                ComposeStatus::Accepted(self.status())
+            }
+        }
+    }
+
+    #[inline]
+    pub fn reset(&mut self) {
+        unsafe {
+            (XKBCH.xkb_compose_state_reset)(self.state.as_ptr());
+        }
+    }
+
+    #[inline]
+    pub fn status(&mut self) -> xkb_compose_status {
+        unsafe { (XKBCH.xkb_compose_state_get_status)(self.state.as_ptr()) }
+    }
+}
+
+impl Drop for XkbComposeState {
+    fn drop(&mut self) {
+        unsafe {
+            (XKBCH.xkb_compose_state_unref)(self.state.as_ptr());
+        };
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+pub enum ComposeStatus {
+    Accepted(xkb_compose_status),
+    Ignored,
+    None,
+}

src/platform_impl/linux/common/xkb/keymap.rs

@@ -1,6 +1,24 @@
-//! Convert XKB keys to Winit keys.
+//! XKB keymap.
+
+use std::ffi::c_char;
+use std::ops::Deref;
+use std::ptr::{self, NonNull};
+
+#[cfg(x11_platform)]
+use x11_dl::xlib_xcb::xcb_connection_t;
+#[cfg(wayland_platform)]
+use {memmap2::MmapOptions, std::os::unix::io::OwnedFd};
+
+use xkb::XKB_MOD_INVALID;
+use xkbcommon_dl::{
+    self as xkb, xkb_keycode_t, xkb_keymap, xkb_keymap_compile_flags, xkb_keysym_t,
+    xkb_layout_index_t, xkb_mod_index_t,
+};
 
 use crate::keyboard::{Key, KeyCode, KeyLocation, NamedKey, NativeKey, NativeKeyCode, PhysicalKey};
+#[cfg(x11_platform)]
+use crate::platform_impl::common::xkb::XKBXH;
+use crate::platform_impl::common::xkb::{XkbContext, XKBH};
 
 /// Map the raw X11-style keycode to the `KeyCode` enum.
 ///
@@ -894,3 +912,140 @@ pub fn keysym_location(keysym: u32) -> KeyLocation {
         _ => KeyLocation::Standard,
     }
 }
+
+#[derive(Debug)]
+pub struct XkbKeymap {
+    keymap: NonNull<xkb_keymap>,
+    _mods_indices: ModsIndices,
+    pub _core_keyboard_id: i32,
+}
+
+impl XkbKeymap {
+    #[cfg(wayland_platform)]
+    pub fn from_fd(context: &XkbContext, fd: OwnedFd, size: usize) -> Option<Self> {
+        let map = unsafe { MmapOptions::new().len(size).map_copy_read_only(&fd).ok()? };
+
+        let keymap = unsafe {
+            let keymap = (XKBH.xkb_keymap_new_from_string)(
+                (*context).as_ptr(),
+                map.as_ptr() as *const _,
+                xkb::xkb_keymap_format::XKB_KEYMAP_FORMAT_TEXT_V1,
+                xkb_keymap_compile_flags::XKB_KEYMAP_COMPILE_NO_FLAGS,
+            );
+            NonNull::new(keymap)?
+        };
+
+        Some(Self::new_inner(keymap, 0))
+    }
+
+    #[cfg(x11_platform)]
+    pub fn from_x11_keymap(
+        context: &XkbContext,
+        xcb: *mut xcb_connection_t,
+        core_keyboard_id: i32,
+    ) -> Option<Self> {
+        let keymap = unsafe {
+            (XKBXH.xkb_x11_keymap_new_from_device)(
+                context.as_ptr(),
+                xcb,
+                core_keyboard_id,
+                xkb_keymap_compile_flags::XKB_KEYMAP_COMPILE_NO_FLAGS,
+            )
+        };
+        let keymap = NonNull::new(keymap)?;
+        Some(Self::new_inner(keymap, core_keyboard_id))
+    }
+
+    fn new_inner(keymap: NonNull<xkb_keymap>, _core_keyboard_id: i32) -> Self {
+        let mods_indices = ModsIndices {
+            shift: mod_index_for_name(keymap, xkb::XKB_MOD_NAME_SHIFT),
+            caps: mod_index_for_name(keymap, xkb::XKB_MOD_NAME_CAPS),
+            ctrl: mod_index_for_name(keymap, xkb::XKB_MOD_NAME_CTRL),
+            alt: mod_index_for_name(keymap, xkb::XKB_MOD_NAME_ALT),
+            num: mod_index_for_name(keymap, xkb::XKB_MOD_NAME_NUM),
+            mod3: mod_index_for_name(keymap, b"Mod3\0"),
+            logo: mod_index_for_name(keymap, xkb::XKB_MOD_NAME_LOGO),
+            mod5: mod_index_for_name(keymap, b"Mod5\0"),
+        };
+
+        Self {
+            keymap,
+            _mods_indices: mods_indices,
+            _core_keyboard_id,
+        }
+    }
+
+    #[cfg(x11_platform)]
+    pub fn mods_indices(&self) -> ModsIndices {
+        self._mods_indices
+    }
+
+    pub fn first_keysym_by_level(
+        &mut self,
+        layout: xkb_layout_index_t,
+        keycode: xkb_keycode_t,
+    ) -> xkb_keysym_t {
+        unsafe {
+            let mut keysyms = ptr::null();
+            let count = (XKBH.xkb_keymap_key_get_syms_by_level)(
+                self.keymap.as_ptr(),
+                keycode,
+                layout,
+                // NOTE: The level should be zero to ignore modifiers.
+                0,
+                &mut keysyms,
+            );
+
+            if count == 1 {
+                *keysyms
+            } else {
+                0
+            }
+        }
+    }
+
+    /// Check whether the given key repeats.
+    pub fn key_repeats(&mut self, keycode: xkb_keycode_t) -> bool {
+        unsafe { (XKBH.xkb_keymap_key_repeats)(self.keymap.as_ptr(), keycode) == 1 }
+    }
+}
+
+impl Drop for XkbKeymap {
+    fn drop(&mut self) {
+        unsafe {
+            (XKBH.xkb_keymap_unref)(self.keymap.as_ptr());
+        };
+    }
+}
+
+impl Deref for XkbKeymap {
+    type Target = NonNull<xkb_keymap>;
+    fn deref(&self) -> &Self::Target {
+        &self.keymap
+    }
+}
+
+/// Modifier index in the keymap.
+#[derive(Default, Debug, Clone, Copy)]
+pub struct ModsIndices {
+    pub shift: Option<xkb_mod_index_t>,
+    pub caps: Option<xkb_mod_index_t>,
+    pub ctrl: Option<xkb_mod_index_t>,
+    pub alt: Option<xkb_mod_index_t>,
+    pub num: Option<xkb_mod_index_t>,
+    pub mod3: Option<xkb_mod_index_t>,
+    pub logo: Option<xkb_mod_index_t>,
+    pub mod5: Option<xkb_mod_index_t>,
+}
+
+fn mod_index_for_name(keymap: NonNull<xkb_keymap>, name: &[u8]) -> Option<xkb_mod_index_t> {
+    unsafe {
+        let mod_index =
+            (XKBH.xkb_keymap_mod_get_index)(keymap.as_ptr(), name.as_ptr() as *const c_char);
+        if mod_index == XKB_MOD_INVALID {
+            None
+        } else {
+            Some(mod_index)
+        }
+    }
+}

src/platform_impl/linux/common/xkb/mod.rs

@@ -0,0 +1,465 @@
+use std::ops::Deref;
+use std::os::raw::c_char;
+use std::ptr::{self, NonNull};
+use std::sync::atomic::{AtomicBool, Ordering};
+
+use crate::utils::Lazy;
+use smol_str::SmolStr;
+#[cfg(wayland_platform)]
+use std::os::unix::io::OwnedFd;
+use tracing::warn;
+use xkbcommon_dl::{
+    self as xkb, xkb_compose_status, xkb_context, xkb_context_flags, xkbcommon_compose_handle,
+    xkbcommon_handle, XkbCommon, XkbCommonCompose,
+};
+#[cfg(x11_platform)]
+use {x11_dl::xlib_xcb::xcb_connection_t, xkbcommon_dl::x11::xkbcommon_x11_handle};
+
+use crate::event::ElementState;
+use crate::event::KeyEvent;
+use crate::keyboard::{Key, KeyLocation};
+use crate::platform_impl::KeyEventExtra;
+
+mod compose;
+mod keymap;
+mod state;
+
+use compose::{ComposeStatus, XkbComposeState, XkbComposeTable};
+use keymap::XkbKeymap;
+
+#[cfg(x11_platform)]
+pub use keymap::raw_keycode_to_physicalkey;
+pub use keymap::{physicalkey_to_scancode, scancode_to_physicalkey};
+pub use state::XkbState;
+
+// TODO: Wire this up without using a static `AtomicBool`.
+static RESET_DEAD_KEYS: AtomicBool = AtomicBool::new(false);
+
+static XKBH: Lazy<&'static XkbCommon> = Lazy::new(xkbcommon_handle);
+static XKBCH: Lazy<&'static XkbCommonCompose> = Lazy::new(xkbcommon_compose_handle);
+#[cfg(feature = "x11")]
+static XKBXH: Lazy<&'static xkb::x11::XkbCommonX11> = Lazy::new(xkbcommon_x11_handle);
+
+#[inline(always)]
+pub fn reset_dead_keys() {
+    RESET_DEAD_KEYS.store(true, Ordering::SeqCst);
+}
+
+#[derive(Debug)]
+pub enum Error {
+    /// libxkbcommon is not available
+    XKBNotFound,
+}
+
+#[derive(Debug)]
+pub struct Context {
+    // NOTE: field order matters.
+    #[cfg(x11_platform)]
+    pub core_keyboard_id: i32,
+    state: Option<XkbState>,
+    keymap: Option<XkbKeymap>,
+    compose_state1: Option<XkbComposeState>,
+    compose_state2: Option<XkbComposeState>,
+    _compose_table: Option<XkbComposeTable>,
+    context: XkbContext,
+    scratch_buffer: Vec<u8>,
+}
+
+impl Context {
+    pub fn new() -> Result<Self, Error> {
+        if xkb::xkbcommon_option().is_none() {
+            return Err(Error::XKBNotFound);
+        }
+
+        let context = XkbContext::new()?;
+        let mut compose_table = XkbComposeTable::new(&context);
+        let mut compose_state1 = compose_table.as_ref().and_then(|table| table.new_state());
+        let mut compose_state2 = compose_table.as_ref().and_then(|table| table.new_state());
+
+        // Disable compose if anything compose related failed to initialize.
+        if compose_table.is_none() || compose_state1.is_none() || compose_state2.is_none() {
+            compose_state2 = None;
+            compose_state1 = None;
+            compose_table = None;
+        }
+
+        Ok(Self {
+            state: None,
+            keymap: None,
+            compose_state1,
+            compose_state2,
+            #[cfg(x11_platform)]
+            core_keyboard_id: 0,
+            _compose_table: compose_table,
+            context,
+            scratch_buffer: Vec::with_capacity(8),
+        })
+    }
+
+    #[cfg(feature = "x11")]
+    pub fn from_x11_xkb(xcb: *mut xcb_connection_t) -> Result<Self, Error> {
+        let result = unsafe {
+            (XKBXH.xkb_x11_setup_xkb_extension)(
+                xcb,
+                1,
+                2,
+                xkbcommon_dl::x11::xkb_x11_setup_xkb_extension_flags::XKB_X11_SETUP_XKB_EXTENSION_NO_FLAGS,
+                ptr::null_mut(),
+                ptr::null_mut(),
+                ptr::null_mut(),
+                ptr::null_mut(),
+            )
+        };
+
+        if result != 1 {
+            return Err(Error::XKBNotFound);
+        }
+
+        let mut this = Self::new()?;
+        this.core_keyboard_id = unsafe { (XKBXH.xkb_x11_get_core_keyboard_device_id)(xcb) };
+        this.set_keymap_from_x11(xcb);
+        Ok(this)
+    }
+
+    pub fn state_mut(&mut self) -> Option<&mut XkbState> {
+        self.state.as_mut()
+    }
+
+    pub fn keymap_mut(&mut self) -> Option<&mut XkbKeymap> {
+        self.keymap.as_mut()
+    }
+
+    #[cfg(wayland_platform)]
+    pub fn set_keymap_from_fd(&mut self, fd: OwnedFd, size: usize) {
+        let keymap = XkbKeymap::from_fd(&self.context, fd, size);
+        let state = keymap.as_ref().and_then(XkbState::new_wayland);
+        if keymap.is_none() || state.is_none() {
+            warn!("failed to update xkb keymap");
+        }
+        self.state = state;
+        self.keymap = keymap;
+    }
+
+    #[cfg(x11_platform)]
+    pub fn set_keymap_from_x11(&mut self, xcb: *mut xcb_connection_t) {
+        let keymap = XkbKeymap::from_x11_keymap(&self.context, xcb, self.core_keyboard_id);
+        let state = keymap
+            .as_ref()
+            .and_then(|keymap| XkbState::new_x11(xcb, keymap));
+        if keymap.is_none() || state.is_none() {
+            warn!("failed to update xkb keymap");
+        }
+        self.state = state;
+        self.keymap = keymap;
+    }
+
+    /// Key builder context with the user provided xkb state.
+    pub fn key_context(&mut self) -> Option<KeyContext<'_>> {
+        let state = self.state.as_mut()?;
+        let keymap = self.keymap.as_mut()?;
+        let compose_state1 = self.compose_state1.as_mut();
+        let compose_state2 = self.compose_state2.as_mut();
+        let scratch_buffer = &mut self.scratch_buffer;
+        Some(KeyContext {
+            state,
+            keymap,
+            compose_state1,
+            compose_state2,
+            scratch_buffer,
+        })
+    }
+
+    /// Key builder context with the user provided xkb state.
+    ///
+    /// Should be used when the original context must not be altered.
+    #[cfg(x11_platform)]
+    pub fn key_context_with_state<'a>(
+        &'a mut self,
+        state: &'a mut XkbState,
+    ) -> Option<KeyContext<'a>> {
+        let keymap = self.keymap.as_mut()?;
+        let compose_state1 = self.compose_state1.as_mut();
+        let compose_state2 = self.compose_state2.as_mut();
+        let scratch_buffer = &mut self.scratch_buffer;
+        Some(KeyContext {
+            state,
+            keymap,
+            compose_state1,
+            compose_state2,
+            scratch_buffer,
+        })
+    }
+}
+
+pub struct KeyContext<'a> {
+    pub state: &'a mut XkbState,
+    pub keymap: &'a mut XkbKeymap,
+    compose_state1: Option<&'a mut XkbComposeState>,
+    compose_state2: Option<&'a mut XkbComposeState>,
+    scratch_buffer: &'a mut Vec<u8>,
+}
+
+impl<'a> KeyContext<'a> {
+    pub fn process_key_event(
+        &mut self,
+        keycode: u32,
+        state: ElementState,
+        repeat: bool,
+    ) -> KeyEvent {
+        let mut event =
+            KeyEventResults::new(self, keycode, !repeat && state == ElementState::Pressed);
+        let physical_key = keymap::raw_keycode_to_physicalkey(keycode);
+        let (logical_key, location) = event.key();
+        let text = event.text();
+        let (key_without_modifiers, _) = event.key_without_modifiers();
+        let text_with_all_modifiers = event.text_with_all_modifiers();
+
+        let platform_specific = KeyEventExtra {
+            text_with_all_modifiers,
+            key_without_modifiers,
+        };
+
+        KeyEvent {
+            physical_key,
+            logical_key,
+            text,
+            location,
+            state,
+            repeat,
+            platform_specific,
+        }
+    }
+
+    fn keysym_to_utf8_raw(&mut self, keysym: u32) -> Option<SmolStr> {
+        self.scratch_buffer.clear();
+        self.scratch_buffer.reserve(8);
+        loop {
+            let bytes_written = unsafe {
+                (XKBH.xkb_keysym_to_utf8)(
+                    keysym,
+                    self.scratch_buffer.as_mut_ptr().cast(),
+                    self.scratch_buffer.capacity(),
+                )
+            };
+            if bytes_written == 0 {
+                return None;
+            } else if bytes_written == -1 {
+                self.scratch_buffer.reserve(8);
+            } else {
+                unsafe {
+                    self.scratch_buffer
+                        .set_len(bytes_written.try_into().unwrap())
+                };
+                break;
+            }
+        }
+
+        // Remove the null-terminator
+        self.scratch_buffer.pop();
+        byte_slice_to_smol_str(self.scratch_buffer)
+    }
+}
+
+struct KeyEventResults<'a, 'b> {
+    context: &'a mut KeyContext<'b>,
+    keycode: u32,
+    keysym: u32,
+    compose: ComposeStatus,
+}
+
+impl<'a, 'b> KeyEventResults<'a, 'b> {
+    fn new(context: &'a mut KeyContext<'b>, keycode: u32, compose: bool) -> Self {
+        let keysym = context.state.get_one_sym_raw(keycode);
+
+        let compose = if let Some(state) = context.compose_state1.as_mut().filter(|_| compose) {
+            if RESET_DEAD_KEYS.swap(false, Ordering::SeqCst) {
+                state.reset();
+                context.compose_state2.as_mut().unwrap().reset();
+            }
+            state.feed(keysym)
+        } else {
+            ComposeStatus::None
+        };
+
+        KeyEventResults {
+            context,
+            keycode,
+            keysym,
+            compose,
+        }
+    }
+
+    pub fn key(&mut self) -> (Key, KeyLocation) {
+        let (key, location) = match self.keysym_to_key(self.keysym) {
+            Ok(known) => return known,
+            Err(undefined) => undefined,
+        };
+
+        if let ComposeStatus::Accepted(xkb_compose_status::XKB_COMPOSE_COMPOSING) = self.compose {
+            let compose_state = self.context.compose_state2.as_mut().unwrap();
+            // When pressing a dead key twice, the non-combining variant of that character will
+            // be produced. Since this function only concerns itself with a single keypress, we
+            // simulate this double press here by feeding the keysym to the compose state
+            // twice.
+
+            compose_state.feed(self.keysym);
+            if matches!(compose_state.feed(self.keysym), ComposeStatus::Accepted(_)) {
+                // Extracting only a single `char` here *should* be fine, assuming that no
+                // dead key's non-combining variant ever occupies more than one `char`.
+                let text = compose_state.get_string(self.context.scratch_buffer);
+                let key = Key::Dead(text.and_then(|s| s.chars().next()));
+                (key, location)
+            } else {
+                (key, location)
+            }
+        } else {
+            let key = self
+                .composed_text()
+                .unwrap_or_else(|_| self.context.keysym_to_utf8_raw(self.keysym))
+                .map(Key::Character)
+                .unwrap_or(key);
+            (key, location)
+        }
+    }
+
+    pub fn key_without_modifiers(&mut self) -> (Key, KeyLocation) {
+        // This will become a pointer to an array which libxkbcommon owns, so we don't need to deallocate it.
+        let layout = self.context.state.layout(self.keycode);
+        let keysym = self
+            .context
+            .keymap
+            .first_keysym_by_level(layout, self.keycode);
+
+        match self.keysym_to_key(keysym) {
+            Ok((key, location)) => (key, location),
+            Err((key, location)) => {
+                let key = self
+                    .context
+                    .keysym_to_utf8_raw(keysym)
+                    .map(Key::Character)
+                    .unwrap_or(key);
+                (key, location)
+            }
+        }
+    }
+
+    fn keysym_to_key(&self, keysym: u32) -> Result<(Key, KeyLocation), (Key, KeyLocation)> {
+        let location = keymap::keysym_location(keysym);
+        let key = keymap::keysym_to_key(keysym);
+        if matches!(key, Key::Unidentified(_)) {
+            Err((key, location))
+        } else {
+            Ok((key, location))
+        }
+    }
+
+    pub fn text(&mut self) -> Option<SmolStr> {
+        self.composed_text()
+            .unwrap_or_else(|_| self.context.keysym_to_utf8_raw(self.keysym))
+    }
+
+    // The current behaviour makes it so composing a character overrides attempts to input a
+    // control character with the `Ctrl` key. We can potentially add a configuration option
+    // if someone specifically wants the oppsite behaviour.
+    pub fn text_with_all_modifiers(&mut self) -> Option<SmolStr> {
+        match self.composed_text() {
+            Ok(text) => text,
+            Err(_) => self
+                .context
+                .state
+                .get_utf8_raw(self.keycode, self.context.scratch_buffer),
+        }
+    }
+
+    fn composed_text(&mut self) -> Result<Option<SmolStr>, ()> {
+        match self.compose {
+            ComposeStatus::Accepted(status) => match status {
+                xkb_compose_status::XKB_COMPOSE_COMPOSED => {
+                    let state = self.context.compose_state1.as_mut().unwrap();
+                    Ok(state.get_string(self.context.scratch_buffer))
+                }
+                xkb_compose_status::XKB_COMPOSE_COMPOSING
+                | xkb_compose_status::XKB_COMPOSE_CANCELLED => Ok(None),
+                xkb_compose_status::XKB_COMPOSE_NOTHING => Err(()),
+            },
+            _ => Err(()),
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct XkbContext {
+    context: NonNull<xkb_context>,
+}
+
+impl XkbContext {
+    pub fn new() -> Result<Self, Error> {
+        let context = unsafe { (XKBH.xkb_context_new)(xkb_context_flags::XKB_CONTEXT_NO_FLAGS) };
+
+        let context = match NonNull::new(context) {
+            Some(context) => context,
+            None => return Err(Error::XKBNotFound),
+        };
+
+        Ok(Self { context })
+    }
+}
+
+impl Drop for XkbContext {
+    fn drop(&mut self) {
+        unsafe {
+            (XKBH.xkb_context_unref)(self.context.as_ptr());
+        }
+    }
+}
+
+impl Deref for XkbContext {
+    type Target = NonNull<xkb_context>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.context
+    }
+}
+
+/// Shared logic for constructing a string with `xkb_compose_state_get_utf8` and
+/// `xkb_state_key_get_utf8`.
+fn make_string_with<F>(scratch_buffer: &mut Vec<u8>, mut f: F) -> Option<SmolStr>
+where
+    F: FnMut(*mut c_char, usize) -> i32,
+{
+    let size = f(ptr::null_mut(), 0);
+    if size == 0 {
+        return None;
+    }
+    let size = usize::try_from(size).unwrap();
+    scratch_buffer.clear();
+    // The allocated buffer must include space for the null-terminator.
+    scratch_buffer.reserve(size + 1);
+    unsafe {
+        let written = f(
+            scratch_buffer.as_mut_ptr().cast(),
+            scratch_buffer.capacity(),
+        );
+        if usize::try_from(written).unwrap() != size {
+            // This will likely never happen.
+            return None;
+        }
+        scratch_buffer.set_len(size);
+    };
+
+    byte_slice_to_smol_str(scratch_buffer)
+}
+
+// NOTE: This is track_caller so we can have more informative line numbers when logging
+#[track_caller]
+fn byte_slice_to_smol_str(bytes: &[u8]) -> Option<SmolStr> {
+    std::str::from_utf8(bytes)
+        .map(SmolStr::new)
+        .map_err(|e| {
+            tracing::warn!(
+                "UTF-8 received from libxkbcommon ({:?}) was invalid: {e}",
+                bytes
+            )
+        })
+        .ok()
+}

src/platform_impl/linux/common/xkb/state.rs

@@ -0,0 +1,189 @@
+//! XKB state.
+
+use std::os::raw::c_char;
+use std::ptr::NonNull;
+
+use smol_str::SmolStr;
+#[cfg(x11_platform)]
+use x11_dl::xlib_xcb::xcb_connection_t;
+use xkbcommon_dl::{
+    self as xkb, xkb_keycode_t, xkb_keysym_t, xkb_layout_index_t, xkb_state, xkb_state_component,
+};
+
+use crate::platform_impl::common::xkb::keymap::XkbKeymap;
+#[cfg(x11_platform)]
+use crate::platform_impl::common::xkb::XKBXH;
+use crate::platform_impl::common::xkb::{make_string_with, XKBH};
+
+#[derive(Debug)]
+pub struct XkbState {
+    state: NonNull<xkb_state>,
+    modifiers: ModifiersState,
+}
+
+impl XkbState {
+    #[cfg(wayland_platform)]
+    pub fn new_wayland(keymap: &XkbKeymap) -> Option<Self> {
+        let state = NonNull::new(unsafe { (XKBH.xkb_state_new)(keymap.as_ptr()) })?;
+        Some(Self::new_inner(state))
+    }
+
+    #[cfg(x11_platform)]
+    pub fn new_x11(xcb: *mut xcb_connection_t, keymap: &XkbKeymap) -> Option<Self> {
+        let state = unsafe {
+            (XKBXH.xkb_x11_state_new_from_device)(keymap.as_ptr(), xcb, keymap._core_keyboard_id)
+        };
+        let state = NonNull::new(state)?;
+        Some(Self::new_inner(state))
+    }
+
+    fn new_inner(state: NonNull<xkb_state>) -> Self {
+        let modifiers = ModifiersState::default();
+        let mut this = Self { state, modifiers };
+        this.reload_modifiers();
+        this
+    }
+
+    pub fn get_one_sym_raw(&mut self, keycode: xkb_keycode_t) -> xkb_keysym_t {
+        unsafe { (XKBH.xkb_state_key_get_one_sym)(self.state.as_ptr(), keycode) }
+    }
+
+    pub fn layout(&mut self, key: xkb_keycode_t) -> xkb_layout_index_t {
+        unsafe { (XKBH.xkb_state_key_get_layout)(self.state.as_ptr(), key) }
+    }
+
+    #[cfg(x11_platform)]
+    pub fn depressed_modifiers(&mut self) -> xkb::xkb_mod_mask_t {
+        unsafe {
+            (XKBH.xkb_state_serialize_mods)(
+                self.state.as_ptr(),
+                xkb_state_component::XKB_STATE_MODS_DEPRESSED,
+            )
+        }
+    }
+
+    #[cfg(x11_platform)]
+    pub fn latched_modifiers(&mut self) -> xkb::xkb_mod_mask_t {
+        unsafe {
+            (XKBH.xkb_state_serialize_mods)(
+                self.state.as_ptr(),
+                xkb_state_component::XKB_STATE_MODS_LATCHED,
+            )
+        }
+    }
+
+    #[cfg(x11_platform)]
+    pub fn locked_modifiers(&mut self) -> xkb::xkb_mod_mask_t {
+        unsafe {
+            (XKBH.xkb_state_serialize_mods)(
+                self.state.as_ptr(),
+                xkb_state_component::XKB_STATE_MODS_LOCKED,
+            )
+        }
+    }
+
+    pub fn get_utf8_raw(
+        &mut self,
+        keycode: xkb_keycode_t,
+        scratch_buffer: &mut Vec<u8>,
+    ) -> Option<SmolStr> {
+        make_string_with(scratch_buffer, |ptr, len| unsafe {
+            (XKBH.xkb_state_key_get_utf8)(self.state.as_ptr(), keycode, ptr, len)
+        })
+    }
+
+    pub fn modifiers(&self) -> ModifiersState {
+        self.modifiers
+    }
+
+    pub fn update_modifiers(
+        &mut self,
+        mods_depressed: u32,
+        mods_latched: u32,
+        mods_locked: u32,
+        depressed_group: u32,
+        latched_group: u32,
+        locked_group: u32,
+    ) {
+        let mask = unsafe {
+            (XKBH.xkb_state_update_mask)(
+                self.state.as_ptr(),
+                mods_depressed,
+                mods_latched,
+                mods_locked,
+                depressed_group,
+                latched_group,
+                locked_group,
+            )
+        };
+
+        if mask.contains(xkb_state_component::XKB_STATE_MODS_EFFECTIVE) {
+            // Effective value of mods have changed, we need to update our state.
+            self.reload_modifiers();
+        }
+    }
+
+    /// Reload the modifiers.
+    fn reload_modifiers(&mut self) {
+        self.modifiers.ctrl = self.mod_name_is_active(xkb::XKB_MOD_NAME_CTRL);
+        self.modifiers.alt = self.mod_name_is_active(xkb::XKB_MOD_NAME_ALT);
+        self.modifiers.shift = self.mod_name_is_active(xkb::XKB_MOD_NAME_SHIFT);
+        self.modifiers.caps_lock = self.mod_name_is_active(xkb::XKB_MOD_NAME_CAPS);
+        self.modifiers.logo = self.mod_name_is_active(xkb::XKB_MOD_NAME_LOGO);
+        self.modifiers.num_lock = self.mod_name_is_active(xkb::XKB_MOD_NAME_NUM);
+    }
+
+    /// Check if the modifier is active within xkb.
+    fn mod_name_is_active(&mut self, name: &[u8]) -> bool {
+        unsafe {
+            (XKBH.xkb_state_mod_name_is_active)(
+                self.state.as_ptr(),
+                name.as_ptr() as *const c_char,
+                xkb_state_component::XKB_STATE_MODS_EFFECTIVE,
+            ) > 0
+        }
+    }
+}
+
+impl Drop for XkbState {
+    fn drop(&mut self) {
+        unsafe {
+            (XKBH.xkb_state_unref)(self.state.as_ptr());
+        }
+    }
+}
+
+/// Represents the current state of the keyboard modifiers
+///
+/// Each field of this struct represents a modifier and is `true` if this modifier is active.
+///
+/// For some modifiers, this means that the key is currently pressed, others are toggled
+/// (like caps lock).
+#[derive(Copy, Clone, Debug, Default, PartialEq, Eq)]
+pub struct ModifiersState {
+    /// The "control" key
+    pub ctrl: bool,
+    /// The "alt" key
+    pub alt: bool,
+    /// The "shift" key
+    pub shift: bool,
+    /// The "Caps lock" key
+    pub caps_lock: bool,
+    /// The "logo" key
+    ///
+    /// Also known as the "windows" key on most keyboards
+    pub logo: bool,
+    /// The "Num lock" key
+    pub num_lock: bool,
+}
+
+impl From<ModifiersState> for crate::keyboard::ModifiersState {
+    fn from(mods: ModifiersState) -> crate::keyboard::ModifiersState {
+        let mut to_mods = crate::keyboard::ModifiersState::empty();
+        to_mods.set(crate::keyboard::ModifiersState::SHIFT, mods.shift);
+        to_mods.set(crate::keyboard::ModifiersState::CONTROL, mods.ctrl);
+        to_mods.set(crate::keyboard::ModifiersState::ALT, mods.alt);
+        to_mods.set(crate::keyboard::ModifiersState::SUPER, mods.logo);
+        to_mods
+    }
+}

src/platform_impl/linux/mod.rs

@@ -11,19 +11,19 @@ use std::{collections::VecDeque, env, fmt};
 use std::{ffi::CStr, mem::MaybeUninit, os::raw::*, sync::Mutex};
 
 #[cfg(x11_platform)]
-use once_cell::sync::Lazy;
+use crate::utils::Lazy;
 use smol_str::SmolStr;
 
 #[cfg(x11_platform)]
 use self::x11::{X11Error, XConnection, XError, XNotSupported};
 #[cfg(x11_platform)]
 use crate::platform::x11::{WindowType as XWindowType, XlibErrorHook};
+use crate::window::{CustomCursor, CustomCursorSource};
 use crate::{
     dpi::{PhysicalPosition, PhysicalSize, Position, Size},
     error::{EventLoopError, ExternalError, NotSupportedError, OsError as RootOsError},
     event_loop::{
-        AsyncRequestSerial, ControlFlow, DeviceEvents, EventLoopClosed,
-        EventLoopWindowTarget as RootELW,
+        ActiveEventLoop as RootELW, AsyncRequestSerial, ControlFlow, DeviceEvents, EventLoopClosed,
     },
     icon::Icon,
     keyboard::Key,
@@ -34,8 +34,8 @@ use crate::{
     },
 };
 
-pub(crate) use self::common::keymap::{physicalkey_to_scancode, scancode_to_physicalkey};
-pub(crate) use crate::cursor::OnlyCursorImageBuilder as PlatformCustomCursorBuilder;
+pub(crate) use self::common::xkb::{physicalkey_to_scancode, scancode_to_physicalkey};
+pub(crate) use crate::cursor::OnlyCursorImageSource as PlatformCustomCursorSource;
 pub(crate) use crate::icon::RgbaIcon as PlatformIcon;
 pub(crate) use crate::platform_impl::Fullscreen;
 
@@ -72,16 +72,16 @@ impl ApplicationName {
 }
 
 #[derive(Clone, Debug)]
-pub struct PlatformSpecificWindowBuilderAttributes {
+pub struct PlatformSpecificWindowAttributes {
     pub name: Option<ApplicationName>,
     pub activation_token: Option<ActivationToken>,
     #[cfg(x11_platform)]
-    pub x11: X11WindowBuilderAttributes,
+    pub x11: X11WindowAttributes,
 }
 
 #[derive(Clone, Debug)]
 #[cfg(x11_platform)]
-pub struct X11WindowBuilderAttributes {
+pub struct X11WindowAttributes {
     pub visual_id: Option<x11rb::protocol::xproto::Visualid>,
     pub screen_id: Option<i32>,
     pub base_size: Option<Size>,
@@ -92,13 +92,13 @@ pub struct X11WindowBuilderAttributes {
     pub embed_window: Option<x11rb::protocol::xproto::Window>,
 }
 
-impl Default for PlatformSpecificWindowBuilderAttributes {
+impl Default for PlatformSpecificWindowAttributes {
     fn default() -> Self {
         Self {
             name: None,
             activation_token: None,
             #[cfg(x11_platform)]
-            x11: X11WindowBuilderAttributes {
+            x11: X11WindowAttributes {
                 visual_id: None,
                 screen_id: None,
                 base_size: None,
@@ -142,6 +142,44 @@ pub(crate) enum Window {
     Wayland(wayland::Window),
 }
 
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct WindowId(u64);
+
+impl From<WindowId> for u64 {
+    fn from(window_id: WindowId) -> Self {
+        window_id.0
+    }
+}
+
+impl From<u64> for WindowId {
+    fn from(raw_id: u64) -> Self {
+        Self(raw_id)
+    }
+}
+
+impl WindowId {
+    pub const unsafe fn dummy() -> Self {
+        Self(0)
+    }
+}
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum DeviceId {
+    #[cfg(x11_platform)]
+    X(x11::DeviceId),
+    #[cfg(wayland_platform)]
+    Wayland(wayland::DeviceId),
+}
+
+impl DeviceId {
+    pub const unsafe fn dummy() -> Self {
+        #[cfg(wayland_platform)]
+        return DeviceId::Wayland(unsafe { wayland::DeviceId::dummy() });
+        #[cfg(all(not(wayland_platform), x11_platform))]
+        return DeviceId::X(unsafe { x11::DeviceId::dummy() });
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
 pub enum MonitorHandle {
     #[cfg(x11_platform)]
@@ -248,16 +286,16 @@ impl VideoModeHandle {
 impl Window {
     #[inline]
     pub(crate) fn new(
-        window_target: &EventLoopWindowTarget,
+        window_target: &ActiveEventLoop,
         attribs: WindowAttributes,
     ) -> Result<Self, RootOsError> {
         match *window_target {
             #[cfg(wayland_platform)]
-            EventLoopWindowTarget::Wayland(ref window_target) => {
+            ActiveEventLoop::Wayland(ref window_target) => {
                 wayland::Window::new(window_target, attribs).map(Window::Wayland)
             }
             #[cfg(x11_platform)]
-            EventLoopWindowTarget::X(ref window_target) => {
+            ActiveEventLoop::X(ref window_target) => {
                 x11::Window::new(window_target, attribs).map(Window::X)
             }
         }
@@ -272,7 +310,7 @@ impl Window {
     }
 
     #[inline]
-    pub fn id(&self) -> crate::window::WindowId {
+    pub fn id(&self) -> WindowId {
         x11_or_wayland!(match self; Window(w) => w.id())
     }
 
@@ -478,7 +516,7 @@ impl Window {
 
     #[inline]
     pub fn reset_dead_keys(&self) {
-        common::xkb_state::reset_dead_keys()
+        common::xkb::reset_dead_keys()
     }
 
     #[inline]
@@ -606,26 +644,10 @@ pub(crate) enum PlatformCustomCursor {
     #[cfg(x11_platform)]
     X(x11::CustomCursor),
 }
-impl PlatformCustomCursor {
-    pub(crate) fn build(
-        builder: PlatformCustomCursorBuilder,
-        p: &EventLoopWindowTarget,
-    ) -> PlatformCustomCursor {
-        match p {
-            #[cfg(wayland_platform)]
-            EventLoopWindowTarget::Wayland(_) => {
-                Self::Wayland(wayland::CustomCursor::build(builder, p))
-            }
-            #[cfg(x11_platform)]
-            EventLoopWindowTarget::X(p) => Self::X(x11::CustomCursor::build(builder, p)),
-        }
-    }
-}
 
 /// Hooks for X11 errors.
 #[cfg(x11_platform)]
-pub(crate) static mut XLIB_ERROR_HOOKS: Lazy<Mutex<Vec<XlibErrorHook>>> =
-    Lazy::new(|| Mutex::new(Vec::new()));
+pub(crate) static mut XLIB_ERROR_HOOKS: Mutex<Vec<XlibErrorHook>> = Mutex::new(Vec::new());
 
 #[cfg(x11_platform)]
 unsafe extern "C" fn x_error_callback(
@@ -665,7 +687,7 @@ unsafe extern "C" fn x_error_callback(
 
         // Don't log error.
         if !error_handled {
-            log::error!("X11 error: {:#?}", error);
+            tracing::error!("X11 error: {:#?}", error);
             // XXX only update the error, if it wasn't handled by any of the hooks.
             *xconn.latest_error.lock().unwrap() = Some(error);
         }
@@ -791,7 +813,7 @@ impl<T: 'static> EventLoop<T> {
         x11_or_wayland!(match self; EventLoop(evlp) => evlp.pump_events(timeout, callback))
     }
 
-    pub fn window_target(&self) -> &crate::event_loop::EventLoopWindowTarget {
+    pub fn window_target(&self) -> &crate::event_loop::ActiveEventLoop {
         x11_or_wayland!(match self; EventLoop(evlp) => evlp.window_target())
     }
 }
@@ -814,34 +836,38 @@ impl<T: 'static> EventLoopProxy<T> {
     }
 }
 
-pub enum EventLoopWindowTarget {
+pub enum ActiveEventLoop {
     #[cfg(wayland_platform)]
-    Wayland(wayland::EventLoopWindowTarget),
+    Wayland(wayland::ActiveEventLoop),
     #[cfg(x11_platform)]
-    X(x11::EventLoopWindowTarget),
+    X(x11::ActiveEventLoop),
 }
 
-impl EventLoopWindowTarget {
+impl ActiveEventLoop {
     #[inline]
     pub fn is_wayland(&self) -> bool {
         match *self {
             #[cfg(wayland_platform)]
-            EventLoopWindowTarget::Wayland(_) => true,
+            ActiveEventLoop::Wayland(_) => true,
             #[cfg(x11_platform)]
             _ => false,
         }
     }
 
+    pub fn create_custom_cursor(&self, cursor: CustomCursorSource) -> CustomCursor {
+        x11_or_wayland!(match self; ActiveEventLoop(evlp) => evlp.create_custom_cursor(cursor))
+    }
+
     #[inline]
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         match *self {
             #[cfg(wayland_platform)]
-            EventLoopWindowTarget::Wayland(ref evlp) => evlp
+            ActiveEventLoop::Wayland(ref evlp) => evlp
                 .available_monitors()
                 .map(MonitorHandle::Wayland)
                 .collect(),
             #[cfg(x11_platform)]
-            EventLoopWindowTarget::X(ref evlp) => {
+            ActiveEventLoop::X(ref evlp) => {
                 evlp.available_monitors().map(MonitorHandle::X).collect()
             }
         }
@@ -850,7 +876,7 @@ impl EventLoopWindowTarget {
     #[inline]
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
         Some(
-            x11_or_wayland!(match self; EventLoopWindowTarget(evlp) => evlp.primary_monitor()?; as MonitorHandle),
+            x11_or_wayland!(match self; ActiveEventLoop(evlp) => evlp.primary_monitor()?; as MonitorHandle),
         )
     }
 
@@ -902,10 +928,12 @@ impl EventLoopWindowTarget {
         }
     }
 
+    #[allow(dead_code)]
     fn set_exit_code(&self, code: i32) {
         x11_or_wayland!(match self; Self(evlp) => evlp.set_exit_code(code))
     }
 
+    #[allow(dead_code)]
     fn exit_code(&self) -> Option<i32> {
         x11_or_wayland!(match self; Self(evlp) => evlp.exit_code())
     }

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

@@ -10,21 +10,22 @@ use std::sync::atomic::Ordering;
 use std::sync::{Arc, Mutex};
 use std::time::{Duration, Instant};
 
-use sctk::reexports::calloop;
 use sctk::reexports::calloop::Error as CalloopError;
 use sctk::reexports::calloop_wayland_source::WaylandSource;
 use sctk::reexports::client::globals;
 use sctk::reexports::client::{Connection, QueueHandle};
 
+use crate::cursor::OnlyCursorImage;
 use crate::dpi::LogicalSize;
 use crate::error::{EventLoopError, OsError as RootOsError};
 use crate::event::{Event, InnerSizeWriter, StartCause, WindowEvent};
-use crate::event_loop::{
-    ControlFlow, DeviceEvents, EventLoopWindowTarget as RootEventLoopWindowTarget,
-};
+use crate::event_loop::{ActiveEventLoop as RootActiveEventLoop, ControlFlow, DeviceEvents};
 use crate::platform::pump_events::PumpStatus;
 use crate::platform_impl::platform::min_timeout;
-use crate::platform_impl::{EventLoopWindowTarget as PlatformEventLoopWindowTarget, OsError};
+use crate::platform_impl::{
+    ActiveEventLoop as PlatformActiveEventLoop, OsError, PlatformCustomCursor,
+};
+use crate::window::{CustomCursor as RootCustomCursor, CustomCursorSource};
 
 mod proxy;
 pub mod sink;
@@ -34,7 +35,7 @@ use sink::EventSink;
 
 use super::state::{WindowCompositorUpdate, WinitState};
 use super::window::state::FrameCallbackState;
-use super::{logical_to_physical_rounded, WaylandError, WindowId};
+use super::{logical_to_physical_rounded, DeviceId, WaylandError, WindowId};
 
 type WaylandDispatcher = calloop::Dispatcher<'static, WaylandSource<WinitState>, WinitState>;
 
@@ -63,7 +64,7 @@ pub struct EventLoop<T: 'static> {
     connection: Connection,
 
     /// Event loop window target.
-    window_target: RootEventLoopWindowTarget,
+    window_target: RootActiveEventLoop,
 
     // XXX drop after everything else, just to be safe.
     /// Calloop's event loop.
@@ -159,7 +160,7 @@ impl<T: 'static> EventLoop<T> {
             .map_err(|error| error.error);
         map_err!(result, WaylandError::Calloop)?;
 
-        let window_target = EventLoopWindowTarget {
+        let window_target = ActiveEventLoop {
             connection: connection.clone(),
             wayland_dispatcher: wayland_dispatcher.clone(),
             event_loop_awakener,
@@ -179,8 +180,8 @@ impl<T: 'static> EventLoop<T> {
             user_events_sender,
             pending_user_events,
             event_loop,
-            window_target: RootEventLoopWindowTarget {
-                p: PlatformEventLoopWindowTarget::Wayland(window_target),
+            window_target: RootActiveEventLoop {
+                p: PlatformActiveEventLoop::Wayland(window_target),
                 _marker: PhantomData,
             },
         };
@@ -190,7 +191,7 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn run_on_demand<F>(&mut self, mut event_handler: F) -> Result<(), EventLoopError>
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget),
+        F: FnMut(Event<T>, &RootActiveEventLoop),
     {
         let exit = loop {
             match self.pump_events(None, &mut event_handler) {
@@ -217,7 +218,7 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn pump_events<F>(&mut self, timeout: Option<Duration>, mut callback: F) -> PumpStatus
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget),
+        F: FnMut(Event<T>, &RootActiveEventLoop),
     {
         if !self.loop_running {
             self.loop_running = true;
@@ -244,7 +245,7 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn poll_events_with_timeout<F>(&mut self, mut timeout: Option<Duration>, mut callback: F)
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget),
+        F: FnMut(Event<T>, &RootActiveEventLoop),
     {
         let cause = loop {
             let start = Instant::now();
@@ -320,7 +321,7 @@ impl<T: 'static> EventLoop<T> {
 
     fn single_iteration<F>(&mut self, callback: &mut F, cause: StartCause)
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget),
+        F: FnMut(Event<T>, &RootActiveEventLoop),
     {
         // NOTE currently just indented to simplify the diff
 
@@ -366,7 +367,7 @@ impl<T: 'static> EventLoop<T> {
                 let new_inner_size = Arc::new(Mutex::new(physical_size));
                 callback(
                     Event::WindowEvent {
-                        window_id,
+                        window_id: crate::window::WindowId(window_id),
                         event: WindowEvent::ScaleFactorChanged {
                             scale_factor,
                             inner_size_writer: InnerSizeWriter::new(Arc::downgrade(
@@ -420,7 +421,7 @@ impl<T: 'static> EventLoop<T> {
 
                 callback(
                     Event::WindowEvent {
-                        window_id,
+                        window_id: crate::window::WindowId(window_id),
                         event: WindowEvent::Resized(physical_size),
                     },
                     &self.window_target,
@@ -430,7 +431,7 @@ impl<T: 'static> EventLoop<T> {
             if compositor_update.close_window {
                 callback(
                     Event::WindowEvent {
-                        window_id,
+                        window_id: crate::window::WindowId(window_id),
                         event: WindowEvent::CloseRequested,
                     },
                     &self.window_target,
@@ -461,19 +462,19 @@ impl<T: 'static> EventLoop<T> {
             window_ids.extend(state.window_requests.get_mut().keys());
         });
 
-        for window_id in window_ids.drain(..) {
+        for window_id in window_ids.iter() {
             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));
+                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));
                     return Some(WindowEvent::Destroyed);
                 }
 
                 let mut window = state
                     .windows
                     .get_mut()
-                    .get_mut(&window_id)
+                    .get_mut(window_id)
                     .unwrap()
                     .lock()
                     .unwrap();
@@ -485,7 +486,7 @@ impl<T: 'static> EventLoop<T> {
                 // Reset the frame callbacks state.
                 window.frame_callback_reset();
                 let mut redraw_requested = window_requests
-                    .get(&window_id)
+                    .get(window_id)
                     .unwrap()
                     .take_redraw_requested();
 
@@ -496,7 +497,13 @@ impl<T: 'static> EventLoop<T> {
             });
 
             if let Some(event) = event {
-                callback(Event::WindowEvent { window_id, event }, &self.window_target);
+                callback(
+                    Event::WindowEvent {
+                        window_id: crate::window::WindowId(*window_id),
+                        event,
+                    },
+                    &self.window_target,
+                );
             }
         }
 
@@ -508,6 +515,42 @@ impl<T: 'static> EventLoop<T> {
         // This is always the last event we dispatch before poll again
         callback(Event::AboutToWait, &self.window_target);
 
+        // Update the window frames and schedule redraws.
+        let mut wake_up = false;
+        for window_id in window_ids.drain(..) {
+            wake_up |= self.with_state(|state| match state.windows.get_mut().get_mut(&window_id) {
+                Some(window) => {
+                    let refresh = window.lock().unwrap().refresh_frame();
+                    if refresh {
+                        state
+                            .window_requests
+                            .get_mut()
+                            .get_mut(&window_id)
+                            .unwrap()
+                            .redraw_requested
+                            .store(true, Ordering::Relaxed);
+                    }
+
+                    refresh
+                }
+                None => false,
+            });
+        }
+
+        // Wakeup event loop if needed.
+        //
+        // If the user draws from the `AboutToWait` this is likely not required, however
+        // we can't do much about it.
+        if wake_up {
+            match &self.window_target.p {
+                PlatformActiveEventLoop::Wayland(window_target) => {
+                    window_target.event_loop_awakener.ping();
+                }
+                #[cfg(x11_platform)]
+                PlatformActiveEventLoop::X(_) => unreachable!(),
+            }
+        }
+
         std::mem::swap(&mut self.compositor_updates, &mut compositor_updates);
         std::mem::swap(&mut self.buffer_sink, &mut buffer_sink);
         std::mem::swap(&mut self.window_ids, &mut window_ids);
@@ -519,13 +562,13 @@ impl<T: 'static> EventLoop<T> {
     }
 
     #[inline]
-    pub fn window_target(&self) -> &RootEventLoopWindowTarget {
+    pub fn window_target(&self) -> &RootActiveEventLoop {
         &self.window_target
     }
 
     fn with_state<'a, U: 'a, F: FnOnce(&'a mut WinitState) -> U>(&'a mut self, callback: F) -> U {
         let state = match &mut self.window_target.p {
-            PlatformEventLoopWindowTarget::Wayland(window_target) => window_target.state.get_mut(),
+            PlatformActiveEventLoop::Wayland(window_target) => window_target.state.get_mut(),
             #[cfg(x11_platform)]
             _ => unreachable!(),
         };
@@ -535,20 +578,20 @@ impl<T: 'static> EventLoop<T> {
 
     fn loop_dispatch<D: Into<Option<std::time::Duration>>>(&mut self, timeout: D) -> IOResult<()> {
         let state = match &mut self.window_target.p {
-            PlatformEventLoopWindowTarget::Wayland(window_target) => window_target.state.get_mut(),
+            PlatformActiveEventLoop::Wayland(window_target) => window_target.state.get_mut(),
             #[cfg(feature = "x11")]
             _ => unreachable!(),
         };
 
         self.event_loop.dispatch(timeout, state).map_err(|error| {
-            log::error!("Error dispatching event loop: {}", error);
+            tracing::error!("Error dispatching event loop: {}", error);
             error.into()
         })
     }
 
     fn roundtrip(&mut self) -> Result<usize, RootOsError> {
         let state = match &mut self.window_target.p {
-            PlatformEventLoopWindowTarget::Wayland(window_target) => window_target.state.get_mut(),
+            PlatformActiveEventLoop::Wayland(window_target) => window_target.state.get_mut(),
             #[cfg(feature = "x11")]
             _ => unreachable!(),
         };
@@ -591,7 +634,7 @@ impl<T> AsRawFd for EventLoop<T> {
     }
 }
 
-pub struct EventLoopWindowTarget {
+pub struct ActiveEventLoop {
     /// The event loop wakeup source.
     pub event_loop_awakener: calloop::ping::Ping,
 
@@ -615,7 +658,7 @@ pub struct EventLoopWindowTarget {
     pub connection: Connection,
 }
 
-impl EventLoopWindowTarget {
+impl ActiveEventLoop {
     pub(crate) fn set_control_flow(&self, control_flow: ControlFlow) {
         self.control_flow.set(control_flow)
     }
@@ -647,6 +690,12 @@ impl EventLoopWindowTarget {
     #[inline]
     pub fn listen_device_events(&self, _allowed: DeviceEvents) {}
 
+    pub(crate) fn create_custom_cursor(&self, cursor: CustomCursorSource) -> RootCustomCursor {
+        RootCustomCursor {
+            inner: PlatformCustomCursor::Wayland(OnlyCursorImage(Arc::from(cursor.inner.0))),
+        }
+    }
+
     #[cfg(feature = "rwh_05")]
     #[inline]
     pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {

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

@@ -2,8 +2,11 @@
 
 use std::vec::Drain;
 
-use crate::event::{DeviceEvent, DeviceId, Event, WindowEvent};
-use crate::window::WindowId;
+use crate::event::{DeviceEvent, DeviceId as RootDeviceId, Event, WindowEvent};
+use crate::platform_impl::platform::DeviceId as PlatformDeviceId;
+use crate::window::WindowId as RootWindowId;
+
+use super::{DeviceId, WindowId};
 
 /// An event loop's sink to deliver events from the Wayland event callbacks
 /// to the winit's user.
@@ -26,15 +29,19 @@ impl EventSink {
     /// Add new device event to a queue.
     #[inline]
     pub fn push_device_event(&mut self, event: DeviceEvent, device_id: DeviceId) {
-        self.window_events
-            .push(Event::DeviceEvent { event, device_id });
+        self.window_events.push(Event::DeviceEvent {
+            event,
+            device_id: RootDeviceId(PlatformDeviceId::Wayland(device_id)),
+        });
     }
 
     /// Add new window event to a queue.
     #[inline]
     pub fn push_window_event(&mut self, event: WindowEvent, window_id: WindowId) {
-        self.window_events
-            .push(Event::WindowEvent { event, window_id });
+        self.window_events.push(Event::WindowEvent {
+            event,
+            window_id: RootWindowId(window_id),
+        });
     }
 
     #[inline]

src/platform_impl/linux/wayland/mod.rs

@@ -11,13 +11,11 @@ use sctk::reexports::client::{self, ConnectError, DispatchError, Proxy};
 
 pub(super) use crate::cursor::OnlyCursorImage as CustomCursor;
 use crate::dpi::{LogicalSize, PhysicalSize};
-pub use crate::platform_impl::platform::OsError;
-pub use event_loop::{EventLoop, EventLoopProxy, EventLoopWindowTarget};
+pub use crate::platform_impl::platform::{OsError, WindowId};
+pub use event_loop::{ActiveEventLoop, EventLoop, EventLoopProxy};
 pub use output::{MonitorHandle, VideoModeHandle};
 pub use window::Window;
 
-use crate::window::WindowId;
-
 mod event_loop;
 mod output;
 mod seat;
@@ -65,10 +63,20 @@ impl From<WaylandError> for OsError {
     }
 }
 
+/// Dummy device id, since Wayland doesn't have device events.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct DeviceId;
+
+impl DeviceId {
+    pub const unsafe fn dummy() -> Self {
+        DeviceId
+    }
+}
+
 /// Get the WindowId out of the surface.
 #[inline]
 fn make_wid(surface: &WlSurface) -> WindowId {
-    WindowId::from(surface.id().as_ptr() as u64)
+    WindowId(surface.id().as_ptr() as u64)
 }
 
 /// The default routine does floor, but we need round on Wayland.

src/platform_impl/linux/wayland/output.rs

@@ -6,9 +6,9 @@ use sctk::output::OutputData;
 use crate::dpi::{LogicalPosition, PhysicalPosition, PhysicalSize};
 use crate::platform_impl::platform::VideoModeHandle as PlatformVideoModeHandle;
 
-use super::event_loop::EventLoopWindowTarget;
+use super::event_loop::ActiveEventLoop;
 
-impl EventLoopWindowTarget {
+impl ActiveEventLoop {
     #[inline]
     pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle> {
         self.state

src/platform_impl/linux/wayland/seat/keyboard/mod.rs

@@ -5,7 +5,7 @@ use std::time::Duration;
 
 use calloop::timer::{TimeoutAction, Timer};
 use calloop::{LoopHandle, RegistrationToken};
-use log::warn;
+use tracing::warn;
 
 use sctk::reexports::client::protocol::wl_keyboard::WlKeyboard;
 use sctk::reexports::client::protocol::wl_keyboard::{
@@ -17,11 +17,11 @@ use sctk::reexports::client::{Connection, Dispatch, Proxy, QueueHandle, WEnum};
 use crate::event::{ElementState, WindowEvent};
 use crate::keyboard::ModifiersState;
 
-use crate::platform_impl::common::xkb_state::KbdState;
+use crate::platform_impl::common::xkb::Context;
 use crate::platform_impl::wayland::event_loop::sink::EventSink;
 use crate::platform_impl::wayland::seat::WinitSeatState;
 use crate::platform_impl::wayland::state::WinitState;
-use crate::platform_impl::wayland::{self, WindowId};
+use crate::platform_impl::wayland::{self, DeviceId, WindowId};
 
 impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
     fn event(
@@ -43,14 +43,10 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
                     WlKeymapFormat::NoKeymap => {
                         warn!("non-xkb compatible keymap")
                     }
-                    WlKeymapFormat::XkbV1 => unsafe {
-                        seat_state
-                            .keyboard_state
-                            .as_mut()
-                            .unwrap()
-                            .xkb_state
-                            .init_with_fd(fd, size as usize);
-                    },
+                    WlKeymapFormat::XkbV1 => {
+                        let context = &mut seat_state.keyboard_state.as_mut().unwrap().xkb_context;
+                        context.set_keymap_from_fd(fd, size as usize);
+                    }
                     _ => unreachable!(),
                 },
                 WEnum::Unknown(value) => {
@@ -155,7 +151,12 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
                     RepeatInfo::Disable => return,
                 };
 
-                if !keyboard_state.xkb_state.key_repeats(key) {
+                if !keyboard_state
+                    .xkb_context
+                    .keymap_mut()
+                    .unwrap()
+                    .key_repeats(key)
+                {
                     return;
                 }
 
@@ -221,7 +222,11 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
 
                 let keyboard_state = seat_state.keyboard_state.as_mut().unwrap();
                 if keyboard_state.repeat_info != RepeatInfo::Disable
-                    && keyboard_state.xkb_state.key_repeats(key)
+                    && keyboard_state
+                        .xkb_context
+                        .keymap_mut()
+                        .unwrap()
+                        .key_repeats(key)
                     && Some(key) == keyboard_state.current_repeat
                 {
                     keyboard_state.current_repeat = None;
@@ -237,9 +242,14 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
                 group,
                 ..
             } => {
-                let xkb_state = &mut seat_state.keyboard_state.as_mut().unwrap().xkb_state;
+                let xkb_context = &mut seat_state.keyboard_state.as_mut().unwrap().xkb_context;
+                let xkb_state = match xkb_context.state_mut() {
+                    Some(state) => state,
+                    None => return,
+                };
+
                 xkb_state.update_modifiers(mods_depressed, mods_latched, mods_locked, 0, 0, group);
-                seat_state.modifiers = xkb_state.mods_state().into();
+                seat_state.modifiers = xkb_state.modifiers().into();
 
                 // HACK: part of the workaround from `WlKeyboardEvent::Enter`.
                 let window_id = match *data.window_id.lock().unwrap() {
@@ -285,7 +295,7 @@ pub struct KeyboardState {
     pub loop_handle: LoopHandle<'static, WinitState>,
 
     /// The state of the keyboard.
-    pub xkb_state: KbdState,
+    pub xkb_context: Context,
 
     /// The information about the repeat rate obtained from the compositor.
     pub repeat_info: RepeatInfo,
@@ -302,7 +312,7 @@ impl KeyboardState {
         Self {
             keyboard,
             loop_handle,
-            xkb_state: KbdState::new().unwrap(),
+            xkb_context: Context::new().unwrap(),
             repeat_info: RepeatInfo::default(),
             repeat_token: None,
             current_repeat: None,
@@ -384,17 +394,14 @@ fn key_input(
 
     let keyboard_state = seat_state.keyboard_state.as_mut().unwrap();
 
-    let device_id = crate::event::DeviceId::from(0);
-    let event = keyboard_state
-        .xkb_state
-        .process_key_event(keycode, state, repeat);
-
-    event_sink.push_window_event(
-        WindowEvent::KeyboardInput {
+    let device_id = crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId));
+    if let Some(mut key_context) = keyboard_state.xkb_context.key_context() {
+        let event = key_context.process_key_event(keycode, state, repeat);
+        let event = WindowEvent::KeyboardInput {
             device_id,
             event,
             is_synthetic: false,
-        },
-        window_id,
-    );
+        };
+        event_sink.push_window_event(event, window_id);
+    }
 }

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

@@ -54,7 +54,7 @@ pub struct WinitSeatState {
     /// The current modifiers state on the seat.
     modifiers: ModifiersState,
 
-    /// Wether we have pending modifiers.
+    /// Whether we have pending modifiers.
     modifiers_pending: bool,
 }
 

src/platform_impl/linux/wayland/seat/pointer/mod.rs

@@ -22,13 +22,12 @@ use sctk::globals::GlobalData;
 use sctk::seat::pointer::{PointerData, PointerDataExt};
 use sctk::seat::pointer::{PointerEvent, PointerEventKind, PointerHandler};
 use sctk::seat::SeatState;
-use winit_core::event::DeviceId;
 
 use crate::dpi::{LogicalPosition, PhysicalPosition};
 use crate::event::{ElementState, MouseButton, MouseScrollDelta, TouchPhase, WindowEvent};
 
 use crate::platform_impl::wayland::state::WinitState;
-use crate::platform_impl::wayland::{self, WindowId};
+use crate::platform_impl::wayland::{self, DeviceId, WindowId};
 
 pub mod relative_pointer;
 
@@ -43,7 +42,7 @@ impl PointerHandler for WinitState {
         let seat = pointer.winit_data().seat();
         let seat_state = self.seats.get(&seat.id()).unwrap();
 
-        let device_id = DeviceId::from(0);
+        let device_id = crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId));
 
         for event in events {
             let surface = &event.surface;
@@ -197,7 +196,7 @@ impl PointerHandler for WinitState {
                         TouchPhase::Ended
                     } else {
                         match pointer_data.phase {
-                            // Descrete scroll only results in moved events.
+                            // Discrete scroll only results in moved events.
                             _ if has_discrete_scroll => TouchPhase::Moved,
                             TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
                             _ => TouchPhase::Started,

src/platform_impl/linux/wayland/seat/pointer/relative_pointer.rs

@@ -60,19 +60,34 @@ impl Dispatch<ZwpRelativePointerV1, GlobalData, WinitState> for RelativePointerS
         _conn: &Connection,
         _qhandle: &QueueHandle<WinitState>,
     ) {
-        if let zwp_relative_pointer_v1::Event::RelativeMotion {
-            dx_unaccel,
-            dy_unaccel,
-            ..
-        } = event
-        {
-            state.events_sink.push_device_event(
-                DeviceEvent::MouseMotion {
-                    delta: (dx_unaccel, dy_unaccel),
-                },
-                crate::event::DeviceId::from(0),
-            );
-        }
+        let (dx_unaccel, dy_unaccel) = match event {
+            zwp_relative_pointer_v1::Event::RelativeMotion {
+                dx_unaccel,
+                dy_unaccel,
+                ..
+            } => (dx_unaccel, dy_unaccel),
+            _ => return,
+        };
+        state.events_sink.push_device_event(
+            DeviceEvent::Motion {
+                axis: 0,
+                value: dx_unaccel,
+            },
+            super::DeviceId,
+        );
+        state.events_sink.push_device_event(
+            DeviceEvent::Motion {
+                axis: 1,
+                value: dy_unaccel,
+            },
+            super::DeviceId,
+        );
+        state.events_sink.push_device_event(
+            DeviceEvent::MouseMotion {
+                delta: (dx_unaccel, dy_unaccel),
+            },
+            super::DeviceId,
+        );
     }
 }
 

src/platform_impl/linux/wayland/seat/text_input/mod.rs

@@ -94,7 +94,7 @@ impl Dispatch<ZwpTextInputV3, TextInputData, WinitState> for TextInputState {
                 let window_id = wayland::make_wid(&surface);
 
                 // XXX this check is essential, because `leave` could have a
-                // refence to nil surface...
+                // reference to nil surface...
                 let mut window = match windows.get(&window_id) {
                     Some(window) => window.lock().unwrap(),
                     None => return,
@@ -178,7 +178,6 @@ impl ZwpTextInputV3Ext for ZwpTextInputV3 {
             ImePurpose::Normal => (ContentHint::None, ContentPurpose::Normal),
             ImePurpose::Password => (ContentHint::SensitiveData, ContentPurpose::Password),
             ImePurpose::Terminal => (ContentHint::None, ContentPurpose::Terminal),
-            _ => unreachable!(),
         };
         self.set_content_type(hint, purpose);
     }

src/platform_impl/linux/wayland/seat/touch/mod.rs

@@ -6,13 +6,12 @@ use sctk::reexports::client::protocol::wl_touch::WlTouch;
 use sctk::reexports::client::{Connection, Proxy, QueueHandle};
 
 use sctk::seat::touch::{TouchData, TouchHandler};
-use winit_core::event::DeviceId;
 
 use crate::dpi::LogicalPosition;
 use crate::event::{Touch, TouchPhase, WindowEvent};
 
-use crate::platform_impl::wayland;
 use crate::platform_impl::wayland::state::WinitState;
+use crate::platform_impl::wayland::{self, DeviceId};
 
 impl TouchHandler for WinitState {
     fn down(
@@ -43,7 +42,9 @@ impl TouchHandler for WinitState {
 
         self.events_sink.push_window_event(
             WindowEvent::Touch(Touch {
-                device_id: DeviceId::from(0),
+                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                    DeviceId,
+                )),
                 phase: TouchPhase::Started,
                 location: location.to_physical(scale_factor),
                 force: None,
@@ -78,7 +79,9 @@ impl TouchHandler for WinitState {
 
         self.events_sink.push_window_event(
             WindowEvent::Touch(Touch {
-                device_id: DeviceId::from(0),
+                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                    DeviceId,
+                )),
                 phase: TouchPhase::Ended,
                 location: touch_point.location.to_physical(scale_factor),
                 force: None,
@@ -115,7 +118,9 @@ impl TouchHandler for WinitState {
 
         self.events_sink.push_window_event(
             WindowEvent::Touch(Touch {
-                device_id: DeviceId::from(0),
+                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                    DeviceId,
+                )),
                 phase: TouchPhase::Moved,
                 location: touch_point.location.to_physical(scale_factor),
                 force: None,
@@ -139,7 +144,9 @@ impl TouchHandler for WinitState {
 
             self.events_sink.push_window_event(
                 WindowEvent::Touch(Touch {
-                    device_id: DeviceId::from(0),
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
                     phase: TouchPhase::Cancelled,
                     location,
                     force: None,

src/platform_impl/linux/wayland/state.rs

@@ -60,7 +60,7 @@ pub struct WinitState {
     /// The pool where custom cursors are allocated.
     pub custom_cursor_pool: Arc<Mutex<SlotPool>>,
 
-    /// The XDG shell that is used for widnows.
+    /// The XDG shell that is used for windows.
     pub xdg_shell: XdgShell,
 
     /// The currently present windows.
@@ -72,7 +72,7 @@ pub struct WinitState {
     /// The events that were generated directly from the window.
     pub window_events_sink: Arc<Mutex<EventSink>>,
 
-    /// The update for the `windows` comming from the compositor.
+    /// The update for the `windows` coming from the compositor.
     pub window_compositor_updates: Vec<WindowCompositorUpdate>,
 
     /// Currently handled seats.
@@ -133,7 +133,7 @@ impl WinitState {
         ) {
             Ok(c) => Some(c),
             Err(e) => {
-                log::warn!("Subcompositor protocol not available, ignoring CSD: {e:?}");
+                tracing::warn!("Subcompositor protocol not available, ignoring CSD: {e:?}");
                 None
             }
         };
@@ -395,7 +395,7 @@ impl ProvidesRegistryState for WinitState {
     sctk::registry_handlers![OutputState, SeatState];
 }
 
-// The window update comming from the compositor.
+// The window update coming from the compositor.
 #[derive(Debug, Clone, Copy)]
 pub struct WindowCompositorUpdate {
     /// The id of the window this updates belongs to.

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

@@ -18,7 +18,8 @@ use sctk::globals::GlobalData;
 
 use crate::event_loop::AsyncRequestSerial;
 use crate::platform_impl::wayland::state::WinitState;
-use crate::window::{ActivationToken, WindowId};
+use crate::platform_impl::WindowId;
+use crate::window::ActivationToken;
 
 pub struct XdgActivationState {
     xdg_activation: XdgActivationV1,
@@ -82,7 +83,7 @@ impl Dispatch<XdgActivationTokenV1, XdgActivationTokenData, WinitState> for XdgA
                 state.events_sink.push_window_event(
                     crate::event::WindowEvent::ActivationTokenDone {
                         serial: *serial,
-                        token: ActivationToken::new(token),
+                        token: ActivationToken::_new(token),
                     },
                     *window_id,
                 );

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

@@ -3,7 +3,6 @@
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Mutex};
 
-use sctk::reexports::calloop;
 use sctk::reexports::client::protocol::wl_display::WlDisplay;
 use sctk::reexports::client::protocol::wl_surface::WlSurface;
 use sctk::reexports::client::Proxy;
@@ -15,7 +14,7 @@ use sctk::shell::xdg::window::Window as SctkWindow;
 use sctk::shell::xdg::window::WindowDecorations;
 use sctk::shell::WaylandSurface;
 
-use log::warn;
+use tracing::warn;
 
 use crate::dpi::{LogicalSize, PhysicalPosition, PhysicalSize, Position, Size};
 use crate::error::{ExternalError, NotSupportedError, OsError as RootOsError};
@@ -33,7 +32,7 @@ use super::event_loop::sink::EventSink;
 use super::output::MonitorHandle;
 use super::state::WinitState;
 use super::types::xdg_activation::XdgActivationTokenData;
-use super::{EventLoopWindowTarget, WaylandError, WindowId};
+use super::{ActiveEventLoop, WaylandError, WindowId};
 
 pub(crate) mod state;
 
@@ -81,7 +80,7 @@ pub struct Window {
 
 impl Window {
     pub(crate) fn new(
-        event_loop_window_target: &EventLoopWindowTarget,
+        event_loop_window_target: &ActiveEventLoop,
         attributes: WindowAttributes,
     ) -> Result<Self, RootOsError> {
         let queue_handle = event_loop_window_target.queue_handle.clone();
@@ -177,7 +176,7 @@ impl Window {
             xdg_activation.as_ref(),
             attributes.platform_specific.activation_token,
         ) {
-            xdg_activation.activate(token.into_token(), &surface);
+            xdg_activation.activate(token._token, &surface);
         }
 
         // XXX Do initial commit.
@@ -758,3 +757,23 @@ impl WindowRequests {
         self.redraw_requested.swap(false, Ordering::Relaxed)
     }
 }
+
+impl TryFrom<&str> for Theme {
+    type Error = ();
+
+    /// ```
+    /// use winit::window::Theme;
+    ///
+    /// assert_eq!("dark".try_into(), Ok(Theme::Dark));
+    /// assert_eq!("lIghT".try_into(), Ok(Theme::Light));
+    /// ```
+    fn try_from(theme: &str) -> Result<Self, Self::Error> {
+        if theme.eq_ignore_ascii_case("dark") {
+            Ok(Self::Dark)
+        } else if theme.eq_ignore_ascii_case("light") {
+            Ok(Self::Light)
+        } else {
+            Err(())
+        }
+    }
+}