Release 0.24.0

This commit forwards "unknown" Wayland mouse buttons downstream via
'MouseButton::Other'. Possible values for those could be found in
<linux/input-event-codes.h>.

Also, since Wayland just forwards buttons from the kernel, which are
'u16', we must adjust 'MouseButton::Other' to take 'u16' instead of
'u8'.

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
   Check_Formatting:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - uses: hecrj/setup-rust-action@v1
       with:
         rust-version: stable
@@ -37,24 +37,28 @@ jobs:
           - { target: i686-pc-windows-gnu,      os: windows-latest, host: -i686-pc-windows-gnu }
           - { target: i686-unknown-linux-gnu,   os: ubuntu-latest,   }
           - { target: x86_64-unknown-linux-gnu, os: ubuntu-latest,   }
+          - { target: x86_64-unknown-linux-gnu, os: ubuntu-latest, options: --no-default-features, features: x11 }
+          - { target: x86_64-unknown-linux-gnu, os: ubuntu-latest, options: --no-default-features, features: wayland }
+          - { target: aarch64-linux-android,    os: ubuntu-latest,  cmd: 'apk --' }
           - { target: x86_64-apple-darwin,      os: macos-latest,    }
           - { target: x86_64-apple-ios,         os: macos-latest,    }
           - { target: aarch64-apple-ios,        os: macos-latest,    }
           # We're using Windows rather than Ubuntu to run the wasm tests because caching cargo-web
           # doesn't currently work on Linux.
-          - { target: wasm32-unknown-unknown,   os: windows-latest, features: stdweb,  web: web }
-          - { target: wasm32-unknown-unknown,   os: windows-latest, features: web-sys, web: web }
+          - { target: wasm32-unknown-unknown,   os: windows-latest, features: stdweb,  cmd: web }
+          - { target: wasm32-unknown-unknown,   os: windows-latest, features: web-sys, cmd: web }
 
     env:
       RUST_BACKTRACE: 1
       CARGO_INCREMENTAL: 0
       RUSTFLAGS: "-C debuginfo=0"
+      OPTIONS: ${{ matrix.platform.options }}
       FEATURES: ${{ format(',{0}', matrix.platform.features ) }}
-      WEB: ${{ matrix.platform.web }}
+      CMD: ${{ matrix.platform.cmd }}
 
     runs-on: ${{ matrix.platform.os }}
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     # Used to cache cargo-web
     - name: Cache cargo folder
       uses: actions/cache@v1
@@ -70,6 +74,9 @@ jobs:
     - name: Install GCC Multilib
       if: (matrix.platform.os == 'ubuntu-latest') && contains(matrix.platform.target, 'i686')
       run: sudo apt-get update && sudo apt-get install gcc-multilib
+    - name: Install cargo-apk
+      if: contains(matrix.platform.target, 'android')
+      run: cargo install cargo-apk
     - name: Install cargo-web
       continue-on-error: true
       if: contains(matrix.platform.target, 'wasm32')
@@ -78,29 +85,35 @@ jobs:
     - name: Check documentation
       shell: bash
       if: matrix.platform.target != 'wasm32-unknown-unknown'
-      run: cargo doc --no-deps --target ${{ matrix.platform.target }} --features $FEATURES
+      run: cargo $CMD doc --no-deps --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES
 
     - name: Build
       shell: bash
-      run: cargo $WEB build --verbose --target ${{ matrix.platform.target }} --features $FEATURES
+      run: cargo $CMD build --verbose --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES
 
     - name: Build tests
       shell: bash
-      run: cargo $WEB test --no-run --verbose --target ${{ matrix.platform.target }} --features $FEATURES
+      run: cargo $CMD test --no-run --verbose --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES
     - name: Run tests
       shell: bash
-      if: (!contains(matrix.platform.target, 'ios') && !contains(matrix.platform.target, 'wasm32'))
-      run: cargo $WEB test --verbose --target ${{ matrix.platform.target }} --features $FEATURES
+      if: (
+        !contains(matrix.platform.target, 'android') &&
+        !contains(matrix.platform.target, 'ios') &&
+        !contains(matrix.platform.target, 'wasm32'))
+      run: cargo $CMD test --verbose --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES
 
 
     - name: Build with serde enabled
       shell: bash
-      run: cargo $WEB build --verbose --target ${{ matrix.platform.target }} --features serde,$FEATURES
+      run: cargo $CMD build --verbose --target ${{ matrix.platform.target }} $OPTIONS --features serde,$FEATURES
 
     - name: Build tests with serde enabled
       shell: bash
-      run: cargo $WEB test --no-run --verbose --target ${{ matrix.platform.target }} --features serde,$FEATURES
+      run: cargo $CMD test --no-run --verbose --target ${{ matrix.platform.target }} $OPTIONS --features serde,$FEATURES
     - name: Run tests with serde enabled
       shell: bash
-      if: (!contains(matrix.platform.target, 'ios') && !contains(matrix.platform.target, 'wasm32'))
-      run: cargo $WEB test --verbose --target ${{ matrix.platform.target }} --features serde,$FEATURES
+      if: (
+        !contains(matrix.platform.target, 'android') &&
+        !contains(matrix.platform.target, 'ios') &&
+        !contains(matrix.platform.target, 'wasm32'))
+      run: cargo $CMD test --verbose --target ${{ matrix.platform.target }} $OPTIONS --features serde,$FEATURES

.github/workflows/publish.yml

@@ -9,7 +9,7 @@ jobs:
   Publish:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - uses: hecrj/setup-rust-action@v1
       with:
         rust-version: stable

CHANGELOG.md

@@ -1,4 +1,135 @@
-# Unreleased
+# 0.24.0 (2020-12-09)
+
+- On Windows, fix applications not exiting gracefully due to thread_event_target_callback accessing corrupted memory.
+- On Windows, implement `Window::set_ime_position`.
+- **Breaking:** On Windows, Renamed `WindowBuilderExtWindows`'s `is_dark_mode` to `theme`.
+- On Windows, add `WindowBuilderExtWindows::with_theme` to set a preferred theme.
+- On Windows, fix bug causing message boxes to appear delayed.
+- On Android, calling `WindowEvent::Focused` now works properly instead of always returning false. 
+- On Windows, fix alt-tab behaviour by removing borderless fullscreen "always on top" flag.
+- On Windows, fix bug preventing windows with transparency enabled from having fully-opaque regions.
+- **Breaking:** On Windows, include prefix byte in scancodes.
+- On Wayland, fix window not being resizeable when using `with_min_inner_size` in `WindowBuilder`.
+- On Unix, fix cross-compiling to wasm32 without enabling X11 or Wayland.
+- On Windows, fix use after free crash during window destruction.
+- On Web, fix `WindowEvent::ReceivedCharacter` never being sent on key input.
+- On macOS, fix compilation when targeting aarch64
+- On X11, fix `Window::request_redraw` not waking the event loop.
+- On Wayland, the keypad arrow keys are now recognized.
+- **Breaking** Rename `desktop::EventLoopExtDesktop` to `run_return::EventLoopExtRunReturn`.
+- Added `request_user_attention` method to `Window`.
+- **Breaking:** On macOS, removed `WindowExt::request_user_attention`, use `Window::request_user_attention`.  
+- **Breaking:** On X11, removed `WindowExt::set_urgent`, use `Window::request_user_attention`. 
+- On Wayland, default font size in CSD increased from 11 to 17.
+- On Windows, fix bug causing message boxes to appear delayed.
+- On Android, support multi-touch.
+- On Wayland, extra mouse buttons are not dropped anymore.
+- **Breaking**: `MouseButton::Other` now uses `u16`.
+
+# 0.23.0 (2020-10-02)
+
+- On iOS, fixed support for the "Debug View Heirarchy" feature in Xcode.
+- On all platforms, `available_monitors` and `primary_monitor` are now on `EventLoopWindowTarget` rather than `EventLoop` to list monitors event in the event loop.
+- On Unix, X11 and Wayland are now optional features (enabled by default)
+- On X11, fix deadlock when calling `set_fullscreen_inner`.
+- On Web, prevent the webpage from scrolling when the user is focused on a winit canvas
+- On Web, calling `window.set_cursor_icon` no longer breaks HiDPI scaling
+- On Windows, drag and drop is now optional and must be enabled with `WindowBuilderExtWindows::with_drag_and_drop(true)`.
+- On Wayland, fix deadlock when calling to `set_inner_size` from a callback.
+- On macOS, add `hide__other_applications` to `EventLoopWindowTarget` via existing `EventLoopWindowTargetExtMacOS` trait. `hide_other_applications` will hide other applications by calling `-[NSApplication hideOtherApplications: nil]`.
+- On android added support for `run_return`.
+- On MacOS, Fixed fullscreen and dialog support for `run_return`.
+- On Windows, fix bug where we'd try to emit `MainEventsCleared` events during nested win32 event loops.
+- On Web, use mouse events if pointer events aren't supported. This affects Safari.
+- On Windows, `set_ime_position` is now a no-op instead of a runtime crash.
+- On Android, `set_fullscreen` is now a no-op instead of a runtime crash.
+- On iOS and Android, `set_inner_size` is now a no-op instead of a runtime crash.
+- On Android, fix `ControlFlow::Poll` not polling the Android event queue.
+- On macOS, add `NSWindow.hasShadow` support.
+- On Web, fix vertical mouse wheel scrolling being inverted.
+- On Web, implement mouse capturing for click-dragging out of the canvas.
+- On Web, fix `ControlFlow::Exit` not properly handled.
+- On Web (web-sys only), send `WindowEvent::ScaleFactorChanged` event when `window.devicePixelRatio` is changed.
+- **Breaking:** On Web, `set_cursor_position` and `set_cursor_grab` will now always return an error.
+- **Breaking:** `PixelDelta` scroll events now return a `PhysicalPosition`.
+- On NetBSD, fixed crash due to incorrect detection of the main thread.
+- **Breaking:** On X11, `-` key is mapped to the `Minus` virtual key code, instead of `Subtract`.
+- On macOS, fix inverted horizontal scroll.
+- **Breaking:** `current_monitor` now returns `Option<MonitorHandle>`.
+- **Breaking:** `primary_monitor` now returns `Option<MonitorHandle>`.
+- On macOS, updated core-* dependencies and cocoa.
+- Bump `parking_lot` to 0.11
+- On Android, bump `ndk`, `ndk-sys` and `ndk-glue` to 0.2. Checkout the new ndk-glue main proc attribute.
+- On iOS, fixed starting the app in landscape where the view still had portrait dimensions.
+- Deprecate the stdweb backend, to be removed in a future release
+- **Breaking:** Prefixed virtual key codes `Add`, `Multiply`, `Divide`, `Decimal`, and `Subtract` with `Numpad`.
+- Added `Asterisk` and `Plus` virtual key codes.
+- On Web (web-sys only), the `Event::LoopDestroyed` event is correctly emitted when leaving the page.
+- On Web, the `WindowEvent::Destroyed` event now gets emitted when a `Window` is dropped.
+- On Web (web-sys only), the event listeners are now removed when a `Window` is dropped or when the event loop is destroyed.
+- On Web, the event handler closure passed to `EventLoop::run` now gets dropped after the event loop is destroyed.
+- **Breaking:** On Web, the canvas element associated to a `Window` is no longer removed from the DOM when the `Window` is dropped.
+- On Web, `WindowEvent::Resized` is now emitted when `Window::set_inner_size` is called.
+- **Breaking:** `Fullscreen` enum now uses `Borderless(Option<MonitorHandle>)` instead of `Borderless(MonitorHandle)` to allow picking the current monitor.
+- On MacOS, fix `WindowEvent::Moved` ignoring the scale factor.
+- On Wayland, add missing virtual keycodes.
+- On Wayland, implement proper `set_cursor_grab`.
+- On Wayland, the cursor will use similar icons if the requested one isn't available.
+- On Wayland, right clicking on client side decorations will request application menu.
+- On Wayland, fix tracking of window size after state changes.
+- On Wayland, fix client side decorations not being hidden properly in fullscreen.
+- On Wayland, fix incorrect size event when entering fullscreen with client side decorations.
+- On Wayland, fix `resizable` attribute not being applied properly on startup.
+- On Wayland, fix disabled repeat rate not being handled.
+- On Wayland, fix decoration buttons not working after tty switch.
+- On Wayland, fix scaling not being applied on output re-enable.
+- On Wayland, fix crash when `XCURSOR_SIZE` is `0`.
+- On Wayland, fix pointer getting created in some cases without pointer capability.
+- On Wayland, on kwin, fix space between window and decorations on startup.
+- **Breaking:** On Wayland, `Theme` trait was reworked.
+- On Wayland, disable maximize button for non-resizable window.
+- On Wayland, added support for `set_ime_position`.
+- On Wayland, fix crash on startup since GNOME 3.37.90.
+- On X11, fix incorrect modifiers state on startup.
+
+# 0.22.2 (2020-05-16)
+
+- Added Clone implementation for 'static events.
+- On Windows, fix window intermittently hanging when `ControlFlow` was set to `Poll`.
+- On Windows, fix `WindowBuilder::with_maximized` being ignored.
+- On Android, minimal platform support.
+- On iOS, touch positions are now properly converted to physical pixels.
+- On macOS, updated core-* dependencies and cocoa
+
+# 0.22.1 (2020-04-16)
+
+- On X11, fix `ResumeTimeReached` being fired too early.
+- On Web, replaced zero timeout for `ControlFlow::Poll` with `requestAnimationFrame`
+- On Web, fix a possible panic during event handling
+- On macOS, fix `EventLoopProxy` leaking memory for every instance.
+- On Windows, drag and drop can now be disabled with `WindowBuilderExtWindows::with_drag_and_drop(false)`.
+
+# 0.22.0 (2020-03-09)
+
+- On Windows, fix minor timing issue in wait_until_time_or_msg
+- On Windows, rework handling of request_redraw() to address panics.
+- On macOS, fix `set_simple_screen` to remember frame excluding title bar.
+- On Wayland, fix coordinates in touch events when scale factor isn't 1.
+- On Wayland, fix color from `close_button_icon_color` not applying.
+- Ignore locale if unsupported by X11 backend
+- On Wayland, Add HiDPI cursor support
+- On Web, add the ability to query "Light" or "Dark" system theme send `ThemeChanged` on change.
+- Fix `Event::to_static` returning `None` for user events.
+- On Wayland, Hide CSD for fullscreen windows.
+- On Windows, ignore spurious mouse move messages.
+- **Breaking:** Move `ModifiersChanged` variant from `DeviceEvent` to `WindowEvent`.
+- On Windows, add `IconExtWindows` trait which exposes creating an `Icon` from an external file or embedded resource
+- Add `BadIcon::OsError` variant for when OS icon functionality fails
+- On Windows, fix crash at startup on systems that do not properly support Windows' Dark Mode
+- Revert On macOS, fix not sending ReceivedCharacter event for specific keys combinations.
+- on macOS, fix incorrect ReceivedCharacter events for some key combinations.
+- **Breaking:** Use `i32` instead of `u32` for position type in `WindowEvent::Moved`.
+- On macOS, a mouse motion event is now generated before every mouse click.
 
 # 0.21.0 (2020-02-04)
 
@@ -20,7 +151,6 @@
 # 0.20.0 (2020-01-05)
 
 - On X11, fix `ModifiersChanged` emitting incorrect modifier change events
-
 - **Breaking**: Overhaul how Winit handles DPI:
   + Window functions and events now return `PhysicalSize` instead of `LogicalSize`.
   + Functions that take `Size` or `Position` types can now take either `Logical` or `Physical` types.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "winit"
-version = "0.21.0"
+version = "0.24.0"
 authors = ["The winit contributors", "Pierre Krieger <pierre.krieger1708@gmail.com>"]
 description = "Cross-platform window creation library."
 edition = "2018"
@@ -12,11 +12,16 @@ documentation = "https://docs.rs/winit"
 categories = ["gui"]
 
 [package.metadata.docs.rs]
-features = ["serde"]
+features = ["serde", "web-sys"]
+default-target = "x86_64-unknown-linux-gnu"
+targets = ["i686-pc-windows-msvc", "x86_64-pc-windows-msvc", "i686-unknown-linux-gnu", "x86_64-unknown-linux-gnu", "x86_64-apple-darwin", "wasm32-unknown-unknown"]
 
 [features]
+default = ["x11", "wayland"]
 web-sys = ["web_sys", "wasm-bindgen", "instant/wasm-bindgen"]
 stdweb = ["std_web", "instant/stdweb"]
+x11 = ["x11-dl", "mio", "mio-extras", "percent-encoding", "parking_lot"]
+wayland = ["wayland-client", "sctk"]
 
 [dependencies]
 instant = "0.1"
@@ -28,27 +33,31 @@ raw-window-handle = "0.3"
 bitflags = "1"
 
 [dev-dependencies]
-image = "0.21"
-simple_logger = "1"
+image = "0.23.12"
+simple_logger = "1.9"
 
-[target.'cfg(target_os = "android")'.dependencies.android_glue]
-version = "0.2"
+[target.'cfg(target_os = "android")'.dependencies]
+ndk = "0.2.0"
+ndk-sys = "0.2.0"
+ndk-glue = "0.2.0"
 
-[target.'cfg(target_os = "ios")'.dependencies]
-objc = "0.2.3"
+[target.'cfg(any(target_os = "ios", target_os = "macos"))'.dependencies]
+objc = "0.2.7"
 
 [target.'cfg(target_os = "macos")'.dependencies]
-cocoa = "0.19.1"
-core-foundation = "0.6"
-core-graphics = "0.17.3"
+cocoa = "0.24"
+core-foundation = "0.9"
+core-graphics = "0.22"
 dispatch = "0.2.0"
-objc = "0.2.6"
 
 [target.'cfg(target_os = "macos")'.dependencies.core-video-sys]
-version = "0.1.3"
+version = "0.1.4"
 default_features = false
 features = ["display_link"]
 
+[target.'cfg(target_os = "windows")'.dependencies]
+parking_lot = "0.11"
+
 [target.'cfg(target_os = "windows")'.dependencies.winapi]
 version = "0.3.6"
 features = [
@@ -56,6 +65,7 @@ features = [
     "commctrl",
     "dwmapi",
     "errhandlingapi",
+    "imm",
     "hidusage",
     "libloaderapi",
     "objbase",
@@ -74,15 +84,13 @@ features = [
 ]
 
 [target.'cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd", target_os = "netbsd"))'.dependencies]
-wayland-client = { version = "0.23.0", features = [ "dlopen", "egl", "cursor", "eventloop"] }
-mio = "0.6"
-mio-extras = "2.0"
-smithay-client-toolkit = "0.6"
-x11-dl = "2.18.3"
-percent-encoding = "2.0"
-
-[target.'cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd", target_os = "netbsd", target_os = "windows"))'.dependencies.parking_lot]
-version = "0.10"
+wayland-client = { version = "0.28", features = [ "dlopen"] , optional = true }
+sctk = { package = "smithay-client-toolkit", version = "0.12", optional = true }
+mio = { version = "0.6", optional = true }
+mio-extras = { version = "2.0", optional = true }
+x11-dl = { version = "2.18.5", optional = true }
+percent-encoding = { version = "2.0", optional = true }
+parking_lot = { version = "0.11.0", optional = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies.web_sys]
 package = "web-sys"
@@ -90,6 +98,7 @@ version = "0.3.22"
 optional = true
 features = [
     'console',
+    "AddEventListenerOptions",
     'CssStyleDeclaration',
     'BeforeUnloadEvent',
     'Document',
@@ -101,6 +110,8 @@ features = [
     'HtmlCanvasElement',
     'HtmlElement',
     'KeyboardEvent',
+    'MediaQueryList',
+    'MediaQueryListEvent',
     'MouseEvent',
     'Node',
     'PointerEvent',
@@ -119,4 +130,4 @@ optional = true
 features = ["experimental_features_which_may_break_on_minor_version_bumps"]
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
-console_log = "0.1"
+console_log = "0.2"

FEATURES.md

@@ -109,15 +109,15 @@ If your PR makes notable changes to Winit's features, please update this section
   translating keypresses into UTF-8 characters, handling dead keys and IMEs.
 - **Drag & Drop**: Dragging content into winit, detecting when content enters, drops, or if the drop is cancelled.
 - **Raw Device Events**: Capturing input from input devices without any OS filtering.
-- **Gamepad/Joystick events**: Capturing input from gampads and joysticks.
-- **Device movement events:**: Capturing input from the device gyroscope and accelerometer.
+- **Gamepad/Joystick events**: Capturing input from gamepads and joysticks.
+- **Device movement events**: Capturing input from the device gyroscope and accelerometer.
 
 ## Platform
 ### Windows
 * Setting the taskbar icon
 * Setting the parent window
 * `WS_EX_NOREDIRECTIONBITMAP` support
-* Theme the title bar according to Windows 10 Dark Mode setting
+* Theme the title bar according to Windows 10 Dark Mode setting or set a preferred theme
 
 ### macOS
 * Window activation policy
@@ -149,6 +149,9 @@ If your PR makes notable changes to Winit's features, please update this section
 * Getting the device idiom
 * Getting the preferred video mode
 
+### Web
+* Get if systems preferred color scheme is "dark"
+
 ## Usability
 * `serde`: Enables serialization/deserialization of certain types with Serde. (Maintainer: @Osspial)
 
@@ -179,9 +182,11 @@ Legend:
 |Fullscreen                       |✔️     |✔️     |✔️         |✔️             |**N/A**|✔️     |✔️        |
 |Fullscreen toggle                |✔️     |✔️     |✔️         |✔️             |**N/A**|✔️     |✔️        |
 |Exclusive fullscreen             |✔️     |✔️     |✔️         |**N/A**         |❌    |✔️     |**N/A**|
-|HiDPI support                    |✔️     |✔️     |✔️         |✔️             |▢[#721]|✔️    |**N/A**|
+|HiDPI support                    |✔️     |✔️     |✔️         |✔️             |▢[#721]|✔️    |✔️ \*1|
 |Popup windows                    |❌     |❌     |❌         |❌             |❌    |❌     |**N/A**|
 
+\*1: `WindowEvent::ScaleFactorChanged` is not sent on `stdweb` backend.
+
 ### System information
 |Feature          |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS      |WASM      |
 |---------------- | ----- | ---- | ------- | ----------- | ----- | ------- | -------- |
@@ -195,9 +200,9 @@ Legend:
 |Mouse set location      |✔️       |✔️      |✔️       |❓           |**N/A**|**N/A**|**N/A**|
 |Cursor grab             |✔️       |▢[#165] |▢[#242]  |✔️         |**N/A**|**N/A**|❓        |
 |Cursor icon             |✔️       |✔️      |✔️       |✔️           |**N/A**|**N/A**|✔️        |
-|Touch events            |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |✔️        |
-|Touch pressure          |✔️       |❌      |❌       |❌          |❌    |✔️     |✔️        |
-|Multitouch              |✔️       |❌      |✔️       |✔️          |❓     |✔️     |✔️        |
+|Touch events            |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |❌        |
+|Touch pressure          |✔️       |❌      |❌       |❌          |❌    |✔️     |❌        |
+|Multitouch              |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |❌        |
 |Keyboard events         |✔️       |✔️      |✔️       |✔️          |❓     |❌     |✔️        |
 |Drag & Drop             |▢[#720]  |▢[#720] |▢[#720]  |❌[#306]    |**N/A**|**N/A**|❓        |
 |Raw Device Events       |▢[#750]  |▢[#750] |▢[#750]  |❌          |❌    |❌     |❓        |

README.md

@@ -2,12 +2,11 @@
 
 [![Crates.io](https://img.shields.io/crates/v/winit.svg)](https://crates.io/crates/winit)
 [![Docs.rs](https://docs.rs/winit/badge.svg)](https://docs.rs/winit)
-[![Build Status](https://travis-ci.org/rust-windowing/winit.svg?branch=master)](https://travis-ci.org/rust-windowing/winit)
-[![Build status](https://ci.appveyor.com/api/projects/status/hr89but4x1n3dphq/branch/master?svg=true)](https://ci.appveyor.com/project/Osspial/winit/branch/master)
+[![CI Status](https://github.com/rust-windowing/winit/workflows/CI/badge.svg)](https://github.com/rust-windowing/winit/actions)
 
 ```toml
 [dependencies]
-winit = "0.21.0"
+winit = "0.24.0"
 ```
 
 ## [Documentation](https://docs.rs/winit)
@@ -65,15 +64,49 @@ Winit is only officially supported on the latest stable version of the Rust comp
 
 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
 
 ### Platform-specific usage
 
 #### WebAssembly
 
-Building a binary will yield a `.js` file. In order to use it in an HTML file, you need to:
+Winit supports compiling to the `wasm32-unknown-unknown` target with either a
+`stdweb` or a `web-sys` backend for use on web browsers. However, please note
+that **the `stdweb` backend is being deprecated and may be removed in a future
+release of Winit**. The `web-sys` backend is also more feature complete.
 
-- Put a `<canvas id="my_id"></canvas>` element somewhere. A canvas corresponds to a winit "window".
-- Write a Javascript code that creates a global variable named `Module`. Set `Module.canvas` to
-  the element of the `<canvas>` element (in the example you would retrieve it via `document.getElementById("my_id")`).
-  More information [here](https://kripken.github.io/emscripten-site/docs/api_reference/module.html).
-- Make sure that you insert the `.js` file generated by Rust after the `Module` variable is created.
+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 example code using Winit with WebAssembly, 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
+
+This library makes use of the [ndk-rs](https://github.com/rust-windowing/android-ndk-rs) crates, refer to that repo for more documentation.
+
+Running on an Android device needs a dynamic system library, add this to Cargo.toml:
+```toml
+[[example]]
+name = "request_redraw_threaded"
+crate-type = ["cdylib"]
+```
+
+And add this to the example file to add the native activity glue:
+```rust
+#[cfg_attr(target_os = "android", ndk_glue::main(backtrace = "on"))]
+fn main() {
+    ...
+}
+```
+
+And run the application with `cargo apk run --example request_redraw_threaded`

examples/control_flow.rs

@@ -0,0 +1,114 @@
+use std::{thread, time};
+
+use simple_logger::SimpleLogger;
+use winit::{
+    event::{Event, KeyboardInput, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum Mode {
+    Wait,
+    WaitUntil,
+    Poll,
+}
+
+const WAIT_TIME: time::Duration = time::Duration::from_millis(100);
+const POLL_SLEEP_TIME: time::Duration = time::Duration::from_millis(100);
+
+fn main() {
+    SimpleLogger::new().init().unwrap();
+
+    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();
+    let window = WindowBuilder::new()
+        .with_title("Press 1, 2, 3 to change control flow mode. Press R to toggle redraw requests.")
+        .build(&event_loop)
+        .unwrap();
+
+    let mut mode = Mode::Wait;
+    let mut request_redraw = false;
+    let mut wait_cancelled = false;
+    let mut close_requested = false;
+
+    event_loop.run(move |event, _, control_flow| {
+        use winit::event::{ElementState, StartCause, VirtualKeyCode};
+        println!("{:?}", event);
+        match event {
+            Event::NewEvents(start_cause) => {
+                wait_cancelled = match start_cause {
+                    StartCause::WaitCancelled { .. } => mode == Mode::WaitUntil,
+                    _ => false,
+                }
+            }
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => {
+                    close_requested = true;
+                }
+                WindowEvent::KeyboardInput {
+                    input:
+                        KeyboardInput {
+                            virtual_keycode: Some(virtual_code),
+                            state: ElementState::Pressed,
+                            ..
+                        },
+                    ..
+                } => match virtual_code {
+                    VirtualKeyCode::Key1 => {
+                        mode = Mode::Wait;
+                        println!("\nmode: {:?}\n", mode);
+                    }
+                    VirtualKeyCode::Key2 => {
+                        mode = Mode::WaitUntil;
+                        println!("\nmode: {:?}\n", mode);
+                    }
+                    VirtualKeyCode::Key3 => {
+                        mode = Mode::Poll;
+                        println!("\nmode: {:?}\n", mode);
+                    }
+                    VirtualKeyCode::R => {
+                        request_redraw = !request_redraw;
+                        println!("\nrequest_redraw: {}\n", request_redraw);
+                    }
+                    VirtualKeyCode::Escape => {
+                        close_requested = true;
+                    }
+                    _ => (),
+                },
+                _ => (),
+            },
+            Event::MainEventsCleared => {
+                if request_redraw && !wait_cancelled && !close_requested {
+                    window.request_redraw();
+                }
+                if close_requested {
+                    *control_flow = ControlFlow::Exit;
+                }
+            }
+            Event::RedrawRequested(_window_id) => {}
+            Event::RedrawEventsCleared => {
+                *control_flow = match mode {
+                    Mode::Wait => ControlFlow::Wait,
+                    Mode::WaitUntil => {
+                        if wait_cancelled {
+                            *control_flow
+                        } else {
+                            ControlFlow::WaitUntil(time::Instant::now() + WAIT_TIME)
+                        }
+                    }
+                    Mode::Poll => {
+                        thread::sleep(POLL_SLEEP_TIME);
+                        ControlFlow::Poll
+                    }
+                };
+            }
+            _ => (),
+        }
+    });
+}

examples/cursor.rs

@@ -1,3 +1,4 @@
+use simple_logger::SimpleLogger;
 use winit::{
     event::{ElementState, Event, KeyboardInput, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -5,7 +6,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new().build(&event_loop).unwrap();

examples/cursor_grab.rs

@@ -1,3 +1,4 @@
+use simple_logger::SimpleLogger;
 use winit::{
     event::{DeviceEvent, ElementState, Event, KeyboardInput, ModifiersState, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -5,7 +6,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
@@ -38,6 +39,7 @@ fn main() {
                         _ => (),
                     }
                 }
+                WindowEvent::ModifiersChanged(m) => modifiers = m,
                 _ => (),
             },
             Event::DeviceEvent { event, .. } => match event {
@@ -46,7 +48,6 @@ fn main() {
                     ElementState::Pressed => println!("mouse button {} pressed", button),
                     ElementState::Released => println!("mouse button {} released", button),
                 },
-                DeviceEvent::ModifiersChanged(m) => modifiers = m,
                 _ => (),
             },
             _ => (),

examples/custom_events.rs

@@ -1,5 +1,6 @@
 #[cfg(not(target_arch = "wasm32"))]
 fn main() {
+    use simple_logger::SimpleLogger;
     use winit::{
         event::{Event, WindowEvent},
         event_loop::{ControlFlow, EventLoop},
@@ -11,7 +12,7 @@ fn main() {
         Timer,
     }
 
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::<CustomEvent>::with_user_event();
 
     let _window = WindowBuilder::new()

examples/fullscreen.rs

@@ -1,11 +1,13 @@
 use std::io::{stdin, stdout, Write};
+
+use simple_logger::SimpleLogger;
 use winit::event::{ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent};
 use winit::event_loop::{ControlFlow, EventLoop};
 use winit::monitor::{MonitorHandle, VideoMode};
 use winit::window::{Fullscreen, WindowBuilder};
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     print!("Please choose the fullscreen mode: (1) exclusive, (2) borderless: ");
@@ -17,7 +19,7 @@ fn main() {
 
     let fullscreen = Some(match num {
         1 => Fullscreen::Exclusive(prompt_for_video_mode(&prompt_for_monitor(&event_loop))),
-        2 => Fullscreen::Borderless(prompt_for_monitor(&event_loop)),
+        2 => Fullscreen::Borderless(Some(prompt_for_monitor(&event_loop))),
         _ => panic!("Please enter a valid number"),
     });
 

examples/handling_close.rs

@@ -1,3 +1,4 @@
+use simple_logger::SimpleLogger;
 use winit::{
     event::{Event, KeyboardInput, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -5,7 +6,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let _window = WindowBuilder::new()

examples/min_max_size.rs

@@ -1,3 +1,4 @@
+use simple_logger::SimpleLogger;
 use winit::{
     dpi::LogicalSize,
     event::{Event, WindowEvent},
@@ -6,7 +7,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new().build(&event_loop).unwrap();

examples/minimize.rs

@@ -1,11 +1,12 @@
 extern crate winit;
 
+use simple_logger::SimpleLogger;
 use winit::event::{Event, VirtualKeyCode, WindowEvent};
 use winit::event_loop::{ControlFlow, EventLoop};
 use winit::window::WindowBuilder;
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()

examples/monitor_list.rs

@@ -1,7 +1,8 @@
+use simple_logger::SimpleLogger;
 use winit::{event_loop::EventLoop, window::WindowBuilder};
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
     let window = WindowBuilder::new().build(&event_loop).unwrap();
 

examples/multithreaded.rs

@@ -2,6 +2,7 @@
 fn main() {
     use std::{collections::HashMap, sync::mpsc, thread, time::Duration};
 
+    use simple_logger::SimpleLogger;
     use winit::{
         dpi::{PhysicalPosition, PhysicalSize, Position, Size},
         event::{ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent},
@@ -12,7 +13,7 @@ fn main() {
     const WINDOW_COUNT: usize = 3;
     const WINDOW_SIZE: PhysicalSize<u32> = PhysicalSize::new(600, 400);
 
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
     let mut window_senders = HashMap::with_capacity(WINDOW_COUNT);
     for _ in 0..WINDOW_COUNT {
@@ -21,7 +22,7 @@ fn main() {
             .build(&event_loop)
             .unwrap();
 
-        let mut video_modes: Vec<_> = window.current_monitor().video_modes().collect();
+        let mut video_modes: Vec<_> = window.current_monitor().unwrap().video_modes().collect();
         let mut video_mode_id = 0usize;
 
         let (tx, rx) = mpsc::channel();
@@ -34,7 +35,7 @@ fn main() {
                         // was moved to an another monitor, so that the window
                         // appears on this monitor instead when we go fullscreen
                         let previous_video_mode = video_modes.iter().cloned().nth(video_mode_id);
-                        video_modes = window.current_monitor().video_modes().collect();
+                        video_modes = window.current_monitor().unwrap().video_modes().collect();
                         video_mode_id = video_mode_id.min(video_modes.len());
                         let video_mode = video_modes.iter().nth(video_mode_id);
 
@@ -82,9 +83,7 @@ fn main() {
                                 );
                             }
                             F => window.set_fullscreen(match (state, modifiers.alt()) {
-                                (true, false) => {
-                                    Some(Fullscreen::Borderless(window.current_monitor()))
-                                }
+                                (true, false) => Some(Fullscreen::Borderless(None)),
                                 (true, true) => Some(Fullscreen::Exclusive(
                                     video_modes.iter().nth(video_mode_id).unwrap().clone(),
                                 )),

examples/multiwindow.rs

@@ -1,4 +1,6 @@
 use std::collections::HashMap;
+
+use simple_logger::SimpleLogger;
 use winit::{
     event::{ElementState, Event, KeyboardInput, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -6,7 +8,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let mut windows = HashMap::new();

examples/request_redraw.rs

@@ -1,3 +1,4 @@
+use simple_logger::SimpleLogger;
 use winit::{
     event::{ElementState, Event, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -5,7 +6,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()

examples/request_redraw_threaded.rs

@@ -0,0 +1,40 @@
+use std::{thread, time};
+
+use simple_logger::SimpleLogger;
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
+
+fn main() {
+    SimpleLogger::new().init().unwrap();
+    let event_loop = EventLoop::new();
+
+    let window = WindowBuilder::new()
+        .with_title("A fantastic window!")
+        .build(&event_loop)
+        .unwrap();
+
+    thread::spawn(move || loop {
+        thread::sleep(time::Duration::from_secs(1));
+        window.request_redraw();
+    });
+
+    event_loop.run(move |event, _, control_flow| {
+        println!("{:?}", event);
+
+        *control_flow = ControlFlow::Wait;
+
+        match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
+                _ => (),
+            },
+            Event::RedrawRequested(_) => {
+                println!("\nredrawing!\n");
+            }
+            _ => (),
+        }
+    });
+}

examples/resizable.rs

@@ -1,3 +1,4 @@
+use simple_logger::SimpleLogger;
 use winit::{
     dpi::LogicalSize,
     event::{ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent},
@@ -6,7 +7,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let mut resizable = false;

examples/set_ime_position.rs

@@ -0,0 +1,54 @@
+use simple_logger::SimpleLogger;
+use winit::{
+    dpi::PhysicalPosition,
+    event::{ElementState, Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
+
+fn main() {
+    SimpleLogger::new().init().unwrap();
+    let event_loop = EventLoop::new();
+
+    let window = WindowBuilder::new().build(&event_loop).unwrap();
+    window.set_title("A fantastic window!");
+
+    println!("Ime position will system default");
+    println!("Click to set ime position to cursor's");
+
+    let mut cursor_position = PhysicalPosition::new(0.0, 0.0);
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Wait;
+
+        match event {
+            Event::WindowEvent {
+                event: WindowEvent::CursorMoved { position, .. },
+                ..
+            } => {
+                cursor_position = position;
+            }
+            Event::WindowEvent {
+                event:
+                    WindowEvent::MouseInput {
+                        state: ElementState::Released,
+                        ..
+                    },
+                ..
+            } => {
+                println!(
+                    "Setting ime position to {}, {}",
+                    cursor_position.x, cursor_position.y
+                );
+                window.set_ime_position(cursor_position);
+            }
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => {
+                *control_flow = ControlFlow::Exit;
+                return;
+            }
+            _ => (),
+        }
+    });
+}

examples/timer.rs

@@ -1,5 +1,7 @@
 use instant::Instant;
 use std::time::Duration;
+
+use simple_logger::SimpleLogger;
 use winit::{
     event::{Event, StartCause, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -7,7 +9,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let _window = WindowBuilder::new()

examples/transparent.rs

@@ -1,3 +1,4 @@
+use simple_logger::SimpleLogger;
 use winit::{
     event::{Event, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -5,7 +6,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()

examples/video_modes.rs

@@ -1,9 +1,16 @@
+use simple_logger::SimpleLogger;
 use winit::event_loop::EventLoop;
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
-    let monitor = event_loop.primary_monitor();
+    let monitor = match event_loop.primary_monitor() {
+        Some(monitor) => monitor,
+        None => {
+            println!("No primary monitor detected.");
+            return;
+        }
+    };
 
     println!("Listing available video modes:");
 

examples/window.rs

@@ -1,3 +1,4 @@
+use simple_logger::SimpleLogger;
 use winit::{
     event::{Event, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -5,7 +6,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()

examples/window_debug.rs

@@ -1,5 +1,6 @@
 // This example is used by developers to test various window functions.
 
+use simple_logger::SimpleLogger;
 use winit::{
     dpi::{LogicalSize, PhysicalSize},
     event::{DeviceEvent, ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent},
@@ -8,7 +9,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
@@ -20,6 +21,7 @@ fn main() {
     eprintln!("debugging keys:");
     eprintln!("  (E) Enter exclusive fullscreen");
     eprintln!("  (F) Toggle borderless fullscreen");
+    eprintln!("  (P) Toggle borderless fullscreen on system's preffered monitor");
     eprintln!("  (M) Toggle minimized");
     eprintln!("  (Q) Quit event loop");
     eprintln!("  (V) Toggle visibility");
@@ -70,7 +72,7 @@ fn main() {
                             size.width * size.height
                         }
 
-                        let monitor = window.current_monitor();
+                        let monitor = window.current_monitor().unwrap();
                         if let Some(mode) = monitor
                             .video_modes()
                             .max_by(|a, b| area(a.size()).cmp(&area(b.size())))
@@ -88,6 +90,13 @@ fn main() {
                             window.set_fullscreen(Some(Fullscreen::Borderless(monitor)));
                         }
                     }
+                    VirtualKeyCode::P => {
+                        if window.fullscreen().is_some() {
+                            window.set_fullscreen(None);
+                        } else {
+                            window.set_fullscreen(Some(Fullscreen::Borderless(None)));
+                        }
+                    }
                     VirtualKeyCode::M => {
                         minimized = !minimized;
                         window.set_minimized(minimized);

examples/window_icon.rs

@@ -1,5 +1,7 @@
 extern crate image;
 use std::path::Path;
+
+use simple_logger::SimpleLogger;
 use winit::{
     event::Event,
     event_loop::{ControlFlow, EventLoop},
@@ -7,7 +9,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().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,
@@ -45,13 +47,11 @@ fn main() {
 
 fn load_icon(path: &Path) -> Icon {
     let (icon_rgba, icon_width, icon_height) = {
-        let image = image::open(path).expect("Failed to open icon path");
-        use image::{GenericImageView, Pixel};
+        let image = image::open(path)
+            .expect("Failed to open icon path")
+            .into_rgba8();
         let (width, height) = image.dimensions();
-        let mut rgba = Vec::with_capacity((width * height) as usize * 4);
-        for (_, _, pixel) in image.pixels() {
-            rgba.extend_from_slice(&pixel.to_rgba().data);
-        }
+        let rgba = image.into_raw();
         (rgba, width, height)
     };
     Icon::from_rgba(icon_rgba, icon_width, icon_height).expect("Failed to open icon")

examples/window_run_return.rs

@@ -10,15 +10,17 @@
 ))]
 fn main() {
     use std::{thread::sleep, time::Duration};
+
+    use simple_logger::SimpleLogger;
     use winit::{
         event::{Event, WindowEvent},
         event_loop::{ControlFlow, EventLoop},
-        platform::desktop::EventLoopExtDesktop,
+        platform::run_return::EventLoopExtRunReturn,
         window::WindowBuilder,
     };
     let mut event_loop = EventLoop::new();
 
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let _window = WindowBuilder::new()
         .with_title("A fantastic window!")
         .build(&event_loop)

src/dpi.rs

@@ -89,6 +89,8 @@
 //! - **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`.
 //!
 //! [points]: https://en.wikipedia.org/wiki/Point_(typography)
 //! [picas]: https://en.wikipedia.org/wiki/Pica_(typography)
@@ -96,6 +98,7 @@
 //! [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
 
 pub trait Pixel: Copy + Into<f64> {
     fn from_f64(f: f64) -> Self;
@@ -151,8 +154,8 @@ impl Pixel for f64 {
 /// anywhere other than winit, it's recommended to validate them using this function before passing them to winit;
 /// otherwise, you risk panics.
 #[inline]
-pub fn validate_scale_factor(dpi_factor: f64) -> bool {
-    dpi_factor.is_sign_positive() && dpi_factor.is_normal()
+pub fn validate_scale_factor(scale_factor: f64) -> bool {
+    scale_factor.is_sign_positive() && scale_factor.is_normal()
 }
 
 /// A position represented in logical pixels.
@@ -178,16 +181,16 @@ impl<P: Pixel> LogicalPosition<P> {
     #[inline]
     pub fn from_physical<T: Into<PhysicalPosition<X>>, X: Pixel>(
         physical: T,
-        dpi_factor: f64,
+        scale_factor: f64,
     ) -> Self {
-        physical.into().to_logical(dpi_factor)
+        physical.into().to_logical(scale_factor)
     }
 
     #[inline]
-    pub fn to_physical<X: Pixel>(&self, dpi_factor: f64) -> PhysicalPosition<X> {
-        assert!(validate_scale_factor(dpi_factor));
-        let x = self.x.into() * dpi_factor;
-        let y = self.y.into() * dpi_factor;
+    pub fn to_physical<X: Pixel>(&self, scale_factor: f64) -> PhysicalPosition<X> {
+        assert!(validate_scale_factor(scale_factor));
+        let x = self.x.into() * scale_factor;
+        let y = self.y.into() * scale_factor;
         PhysicalPosition::new(x, y).cast()
     }
 
@@ -243,16 +246,16 @@ impl<P: Pixel> PhysicalPosition<P> {
     #[inline]
     pub fn from_logical<T: Into<LogicalPosition<X>>, X: Pixel>(
         logical: T,
-        dpi_factor: f64,
+        scale_factor: f64,
     ) -> Self {
-        logical.into().to_physical(dpi_factor)
+        logical.into().to_physical(scale_factor)
     }
 
     #[inline]
-    pub fn to_logical<X: Pixel>(&self, dpi_factor: f64) -> LogicalPosition<X> {
-        assert!(validate_scale_factor(dpi_factor));
-        let x = self.x.into() / dpi_factor;
-        let y = self.y.into() / dpi_factor;
+    pub fn to_logical<X: Pixel>(&self, scale_factor: f64) -> LogicalPosition<X> {
+        assert!(validate_scale_factor(scale_factor));
+        let x = self.x.into() / scale_factor;
+        let y = self.y.into() / scale_factor;
         LogicalPosition::new(x, y).cast()
     }
 
@@ -306,15 +309,18 @@ impl<P> LogicalSize<P> {
 
 impl<P: Pixel> LogicalSize<P> {
     #[inline]
-    pub fn from_physical<T: Into<PhysicalSize<X>>, X: Pixel>(physical: T, dpi_factor: f64) -> Self {
-        physical.into().to_logical(dpi_factor)
+    pub fn from_physical<T: Into<PhysicalSize<X>>, X: Pixel>(
+        physical: T,
+        scale_factor: f64,
+    ) -> Self {
+        physical.into().to_logical(scale_factor)
     }
 
     #[inline]
-    pub fn to_physical<X: Pixel>(&self, dpi_factor: f64) -> PhysicalSize<X> {
-        assert!(validate_scale_factor(dpi_factor));
-        let width = self.width.into() * dpi_factor;
-        let height = self.height.into() * dpi_factor;
+    pub fn to_physical<X: Pixel>(&self, scale_factor: f64) -> PhysicalSize<X> {
+        assert!(validate_scale_factor(scale_factor));
+        let width = self.width.into() * scale_factor;
+        let height = self.height.into() * scale_factor;
         PhysicalSize::new(width, height).cast()
     }
 
@@ -368,15 +374,15 @@ impl<P> PhysicalSize<P> {
 
 impl<P: Pixel> PhysicalSize<P> {
     #[inline]
-    pub fn from_logical<T: Into<LogicalSize<X>>, X: Pixel>(logical: T, dpi_factor: f64) -> Self {
-        logical.into().to_physical(dpi_factor)
+    pub fn from_logical<T: Into<LogicalSize<X>>, X: Pixel>(logical: T, scale_factor: f64) -> Self {
+        logical.into().to_physical(scale_factor)
     }
 
     #[inline]
-    pub fn to_logical<X: Pixel>(&self, dpi_factor: f64) -> LogicalSize<X> {
-        assert!(validate_scale_factor(dpi_factor));
-        let width = self.width.into() / dpi_factor;
-        let height = self.height.into() / dpi_factor;
+    pub fn to_logical<X: Pixel>(&self, scale_factor: f64) -> LogicalSize<X> {
+        assert!(validate_scale_factor(scale_factor));
+        let width = self.width.into() / scale_factor;
+        let height = self.height.into() / scale_factor;
         LogicalSize::new(width, height).cast()
     }
 
@@ -426,17 +432,17 @@ impl Size {
         size.into()
     }
 
-    pub fn to_logical<P: Pixel>(&self, dpi_factor: f64) -> LogicalSize<P> {
+    pub fn to_logical<P: Pixel>(&self, scale_factor: f64) -> LogicalSize<P> {
         match *self {
-            Size::Physical(size) => size.to_logical(dpi_factor),
+            Size::Physical(size) => size.to_logical(scale_factor),
             Size::Logical(size) => size.cast(),
         }
     }
 
-    pub fn to_physical<P: Pixel>(&self, dpi_factor: f64) -> PhysicalSize<P> {
+    pub fn to_physical<P: Pixel>(&self, scale_factor: f64) -> PhysicalSize<P> {
         match *self {
             Size::Physical(size) => size.cast(),
-            Size::Logical(size) => size.to_physical(dpi_factor),
+            Size::Logical(size) => size.to_physical(scale_factor),
         }
     }
 }
@@ -468,17 +474,17 @@ impl Position {
         position.into()
     }
 
-    pub fn to_logical<P: Pixel>(&self, dpi_factor: f64) -> LogicalPosition<P> {
+    pub fn to_logical<P: Pixel>(&self, scale_factor: f64) -> LogicalPosition<P> {
         match *self {
-            Position::Physical(position) => position.to_logical(dpi_factor),
+            Position::Physical(position) => position.to_logical(scale_factor),
             Position::Logical(position) => position.cast(),
         }
     }
 
-    pub fn to_physical<P: Pixel>(&self, dpi_factor: f64) -> PhysicalPosition<P> {
+    pub fn to_physical<P: Pixel>(&self, scale_factor: f64) -> PhysicalPosition<P> {
         match *self {
             Position::Physical(position) => position.cast(),
-            Position::Logical(position) => position.to_physical(dpi_factor),
+            Position::Logical(position) => position.to_physical(scale_factor),
         }
     }
 }

src/event.rs

@@ -37,7 +37,7 @@ use instant::Instant;
 use std::path::PathBuf;
 
 use crate::{
-    dpi::{LogicalPosition, PhysicalPosition, PhysicalSize},
+    dpi::{PhysicalPosition, PhysicalSize},
     platform_impl,
     window::{Theme, WindowId},
 };
@@ -81,10 +81,11 @@ pub enum Event<'a, T: 'static> {
     ///
     /// This event is useful as a place to put your code that should be run after all
     /// state-changing events have been handled and you want to do stuff (updating state, performing
-    /// calculations, etc) that happens as the "main body" of your event loop. If your program draws
-    /// graphics, it's usually better to do it in response to
+    /// calculations, etc) that happens as the "main body" of your event loop. If your program only draws
+    /// graphics when something changes, it's usually better to do it in response to
     /// [`Event::RedrawRequested`](crate::event::Event::RedrawRequested), which gets emitted
-    /// immediately after this event.
+    /// immediately after this event. Programs that draw graphics continuously, like most games,
+    /// can render here unconditionally for simplicity.
     MainEventsCleared,
 
     /// Emitted after `MainEventsCleared` when a window should be redrawn.
@@ -97,6 +98,9 @@ pub enum Event<'a, T: 'static> {
     ///
     /// During each iteration of the event loop, Winit will aggregate duplicate redraw requests
     /// into a single event, to help avoid duplicating rendering work.
+    ///
+    /// Mainly of interest to applications with mostly-static graphics that avoid redrawing unless
+    /// something changes, like most non-game GUIs.
     RedrawRequested(WindowId),
 
     /// Emitted after all `RedrawRequested` events have been processed and control flow is about to
@@ -114,6 +118,30 @@ pub enum Event<'a, T: 'static> {
     LoopDestroyed,
 }
 
+impl<T: Clone> Clone for Event<'static, T> {
+    fn clone(&self) -> Self {
+        use self::Event::*;
+        match self {
+            WindowEvent { window_id, event } => WindowEvent {
+                window_id: *window_id,
+                event: event.clone(),
+            },
+            UserEvent(event) => UserEvent(event.clone()),
+            DeviceEvent { device_id, event } => DeviceEvent {
+                device_id: *device_id,
+                event: event.clone(),
+            },
+            NewEvents(cause) => NewEvents(cause.clone()),
+            MainEventsCleared => MainEventsCleared,
+            RedrawRequested(wid) => RedrawRequested(*wid),
+            RedrawEventsCleared => RedrawEventsCleared,
+            LoopDestroyed => LoopDestroyed,
+            Suspended => Suspended,
+            Resumed => Resumed,
+        }
+    }
+}
+
 impl<'a, T> Event<'a, T> {
     pub fn map_nonuser_event<U>(self) -> Result<Event<'a, U>, Event<'a, T>> {
         use self::Event::*;
@@ -139,7 +167,7 @@ impl<'a, T> Event<'a, T> {
             WindowEvent { window_id, event } => event
                 .to_static()
                 .map(|event| WindowEvent { window_id, event }),
-            UserEvent(_) => None,
+            UserEvent(event) => Some(UserEvent(event)),
             DeviceEvent { device_id, event } => Some(DeviceEvent { device_id, event }),
             NewEvents(cause) => Some(NewEvents(cause)),
             MainEventsCleared => Some(MainEventsCleared),
@@ -185,7 +213,7 @@ pub enum WindowEvent<'a> {
     Resized(PhysicalSize<u32>),
 
     /// The position of the window has changed. Contains the window's new position.
-    Moved(PhysicalPosition<u32>),
+    Moved(PhysicalPosition<i32>),
 
     /// The window has been requested to close.
     CloseRequested,
@@ -235,6 +263,13 @@ pub enum WindowEvent<'a> {
         is_synthetic: bool,
     },
 
+    /// The keyboard modifiers have changed.
+    ///
+    /// Platform-specific behavior:
+    /// - **Web**: This API is currently unimplemented on the web. This isn't by design - it's an
+    ///   issue, and it should get fixed - but it's the current state of the API.
+    ModifiersChanged(ModifiersState),
+
     /// The cursor has moved on the window.
     CursorMoved {
         device_id: DeviceId,
@@ -243,7 +278,7 @@ pub enum WindowEvent<'a> {
         /// limited by the display area and it may have been transformed by the OS to implement effects such as cursor
         /// acceleration, it should not be used to implement non-cursor-like interactions such as 3D camera control.
         position: PhysicalPosition<f64>,
-        #[deprecated = "Deprecated in favor of DeviceEvent::ModifiersChanged"]
+        #[deprecated = "Deprecated in favor of WindowEvent::ModifiersChanged"]
         modifiers: ModifiersState,
     },
 
@@ -258,7 +293,7 @@ pub enum WindowEvent<'a> {
         device_id: DeviceId,
         delta: MouseScrollDelta,
         phase: TouchPhase,
-        #[deprecated = "Deprecated in favor of DeviceEvent::ModifiersChanged"]
+        #[deprecated = "Deprecated in favor of WindowEvent::ModifiersChanged"]
         modifiers: ModifiersState,
     },
 
@@ -267,7 +302,7 @@ pub enum WindowEvent<'a> {
         device_id: DeviceId,
         state: ElementState,
         button: MouseButton,
-        #[deprecated = "Deprecated in favor of DeviceEvent::ModifiersChanged"]
+        #[deprecated = "Deprecated in favor of WindowEvent::ModifiersChanged"]
         modifiers: ModifiersState,
     },
 
@@ -319,6 +354,97 @@ pub enum WindowEvent<'a> {
     ThemeChanged(Theme),
 }
 
+impl Clone for WindowEvent<'static> {
+    fn clone(&self) -> Self {
+        use self::WindowEvent::*;
+        return match self {
+            Resized(size) => Resized(size.clone()),
+            Moved(pos) => Moved(pos.clone()),
+            CloseRequested => CloseRequested,
+            Destroyed => Destroyed,
+            DroppedFile(file) => DroppedFile(file.clone()),
+            HoveredFile(file) => HoveredFile(file.clone()),
+            HoveredFileCancelled => HoveredFileCancelled,
+            ReceivedCharacter(c) => ReceivedCharacter(*c),
+            Focused(f) => Focused(*f),
+            KeyboardInput {
+                device_id,
+                input,
+                is_synthetic,
+            } => KeyboardInput {
+                device_id: *device_id,
+                input: *input,
+                is_synthetic: *is_synthetic,
+            },
+
+            ModifiersChanged(modifiers) => ModifiersChanged(modifiers.clone()),
+            #[allow(deprecated)]
+            CursorMoved {
+                device_id,
+                position,
+                modifiers,
+            } => CursorMoved {
+                device_id: *device_id,
+                position: *position,
+                modifiers: *modifiers,
+            },
+            CursorEntered { device_id } => CursorEntered {
+                device_id: *device_id,
+            },
+            CursorLeft { device_id } => CursorLeft {
+                device_id: *device_id,
+            },
+            #[allow(deprecated)]
+            MouseWheel {
+                device_id,
+                delta,
+                phase,
+                modifiers,
+            } => MouseWheel {
+                device_id: *device_id,
+                delta: *delta,
+                phase: *phase,
+                modifiers: *modifiers,
+            },
+            #[allow(deprecated)]
+            MouseInput {
+                device_id,
+                state,
+                button,
+                modifiers,
+            } => MouseInput {
+                device_id: *device_id,
+                state: *state,
+                button: *button,
+                modifiers: *modifiers,
+            },
+            TouchpadPressure {
+                device_id,
+                pressure,
+                stage,
+            } => TouchpadPressure {
+                device_id: *device_id,
+                pressure: *pressure,
+                stage: *stage,
+            },
+            AxisMotion {
+                device_id,
+                axis,
+                value,
+            } => AxisMotion {
+                device_id: *device_id,
+                axis: *axis,
+                value: *value,
+            },
+            Touch(touch) => Touch(*touch),
+            ThemeChanged(theme) => ThemeChanged(theme.clone()),
+            ScaleFactorChanged { .. } => {
+                unreachable!("Static event can't be about scale factor changing")
+            }
+        };
+    }
+}
+
 impl<'a> WindowEvent<'a> {
     pub fn to_static(self) -> Option<WindowEvent<'static>> {
         use self::WindowEvent::*;
@@ -341,6 +467,7 @@ impl<'a> WindowEvent<'a> {
                 input,
                 is_synthetic,
             }),
+            ModifiersChanged(modifiers) => Some(ModifiersChanged(modifiers)),
             #[allow(deprecated)]
             CursorMoved {
                 device_id,
@@ -464,16 +591,6 @@ pub enum DeviceEvent {
 
     Key(KeyboardInput),
 
-    /// The keyboard modifiers have changed.
-    ///
-    /// This is tracked internally to avoid tracking errors arising from modifier key state changes when events from
-    /// this device are not being delivered to the application, e.g. due to keyboard focus being elsewhere.
-    ///
-    /// Platform-specific behavior:
-    /// - **Web**: This API is currently unimplemented on the web. This isn't by design - it's an
-    ///   issue, and it should get fixed - but it's the current state of the API.
-    ModifiersChanged(ModifiersState),
-
     Text {
         codepoint: char,
     },
@@ -502,7 +619,7 @@ pub struct KeyboardInput {
     ///
     /// This is tracked internally to avoid tracking errors arising from modifier key state changes when events from
     /// this device are not being delivered to the application, e.g. due to keyboard focus being elsewhere.
-    #[deprecated = "Deprecated in favor of DeviceEvent::ModifiersChanged"]
+    #[deprecated = "Deprecated in favor of WindowEvent::ModifiersChanged"]
     pub modifiers: ModifiersState,
 }
 
@@ -628,7 +745,7 @@ pub enum MouseButton {
     Left,
     Right,
     Middle,
-    Other(u8),
+    Other(u16),
 }
 
 /// Describes a difference in the mouse scroll wheel state.
@@ -647,7 +764,7 @@ pub enum MouseScrollDelta {
     /// Scroll events are expressed as a PixelDelta if
     /// supported by the device (eg. a touchpad) and
     /// platform.
-    PixelDelta(LogicalPosition<f64>),
+    PixelDelta(PhysicalPosition<f64>),
 }
 
 /// Symbolic name for a keyboard key.
@@ -775,12 +892,20 @@ pub enum VirtualKeyCode {
     Numpad7,
     Numpad8,
     Numpad9,
+    NumpadAdd,
+    NumpadDivide,
+    NumpadDecimal,
+    NumpadComma,
+    NumpadEnter,
+    NumpadEquals,
+    NumpadMultiply,
+    NumpadSubtract,
 
     AbntC1,
     AbntC2,
-    Add,
     Apostrophe,
     Apps,
+    Asterisk,
     At,
     Ax,
     Backslash,
@@ -789,8 +914,6 @@ pub enum VirtualKeyCode {
     Colon,
     Comma,
     Convert,
-    Decimal,
-    Divide,
     Equals,
     Grave,
     Kana,
@@ -804,19 +927,18 @@ pub enum VirtualKeyCode {
     MediaSelect,
     MediaStop,
     Minus,
-    Multiply,
     Mute,
     MyComputer,
-    NavigateForward,  // also called "Prior"
-    NavigateBackward, // also called "Next"
+    // also called "Next"
+    NavigateForward,
+    // also called "Prior"
+    NavigateBackward,
     NextTrack,
     NoConvert,
-    NumpadComma,
-    NumpadEnter,
-    NumpadEquals,
     OEM102,
     Period,
     PlayPause,
+    Plus,
     Power,
     PrevTrack,
     RAlt,
@@ -828,7 +950,6 @@ pub enum VirtualKeyCode {
     Slash,
     Sleep,
     Stop,
-    Subtract,
     Sysrq,
     Tab,
     Underline,

src/event_loop.rs

@@ -73,6 +73,12 @@ impl<T> fmt::Debug for EventLoopWindowTarget<T> {
 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.
+    ///
+    /// ## Platform-specific
+    /// - **Web:** Events are queued and usually sent when `requestAnimationFrame` fires but sometimes
+    ///   the events in the queue may be sent before the next `requestAnimationFrame` callback, for
+    ///   example when the scaling of the page has changed. This should be treated as an implementation
+    ///   detail which should not be relied on.
     Poll,
     /// When the current loop iteration finishes, suspend the thread until another event arrives.
     Wait,
@@ -154,23 +160,6 @@ impl<T> EventLoop<T> {
             event_loop_proxy: self.event_loop.create_proxy(),
         }
     }
-
-    /// Returns the list of all the monitors available on the system.
-    #[inline]
-    pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle> {
-        self.event_loop
-            .available_monitors()
-            .into_iter()
-            .map(|inner| MonitorHandle { inner })
-    }
-
-    /// Returns the primary monitor of the system.
-    #[inline]
-    pub fn primary_monitor(&self) -> MonitorHandle {
-        MonitorHandle {
-            inner: self.event_loop.primary_monitor(),
-        }
-    }
 }
 
 impl<T> Deref for EventLoop<T> {
@@ -180,6 +169,29 @@ impl<T> Deref for EventLoop<T> {
     }
 }
 
+impl<T> EventLoopWindowTarget<T> {
+    /// Returns the list of all the monitors available on the system.
+    #[inline]
+    pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle> {
+        self.p
+            .available_monitors()
+            .into_iter()
+            .map(|inner| MonitorHandle { inner })
+    }
+
+    /// Returns the primary monitor of the system.
+    ///
+    /// Returns `None` if it can't identify any monitor as a primary one.
+    ///
+    /// ## Platform-specific
+    ///
+    /// **Wayland:** Always returns `None`.
+    #[inline]
+    pub fn primary_monitor(&self) -> Option<MonitorHandle> {
+        self.p.primary_monitor()
+    }
+}
+
 /// Used to send custom events to `EventLoop`.
 pub struct EventLoopProxy<T: 'static> {
     event_loop_proxy: platform_impl::EventLoopProxy<T>,

src/icon.rs

@@ -1,4 +1,5 @@
-use std::{error::Error, fmt, mem};
+use crate::platform_impl::PlatformIcon;
+use std::{error::Error, fmt, io, mem};
 
 #[repr(C)]
 #[derive(Debug)]
@@ -11,7 +12,7 @@ pub(crate) struct Pixel {
 
 pub(crate) const PIXEL_SIZE: usize = mem::size_of::<Pixel>();
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug)]
 /// An error produced when using `Icon::from_rgba` with invalid arguments.
 pub enum BadIcon {
     /// Produced when the length of the `rgba` argument isn't divisible by 4, thus `rgba` can't be
@@ -25,6 +26,8 @@ pub enum BadIcon {
         width_x_height: usize,
         pixel_count: usize,
     },
+    /// Produced when underlying OS functionality failed to create the icon
+    OsError(io::Error),
 }
 
 impl fmt::Display for BadIcon {
@@ -43,6 +46,7 @@ impl fmt::Display for BadIcon {
                 "The specified dimensions ({:?}x{:?}) don't match the number of pixels supplied by the `rgba` argument ({:?}). For those dimensions, the expected pixel count is {:?}.",
                 width, height, pixel_count, width_x_height,
             ),
+            BadIcon::OsError(e) => write!(f, "OS error when instantiating the icon: {:?}", e),
         }
     }
 }
@@ -54,38 +58,78 @@ impl Error for BadIcon {
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
-/// An icon used for the window titlebar, taskbar, etc.
-pub struct Icon {
+pub(crate) struct RgbaIcon {
     pub(crate) rgba: Vec<u8>,
     pub(crate) width: u32,
     pub(crate) height: u32,
 }
 
+/// For platforms which don't have window icons (e.g. web)
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub(crate) struct NoIcon;
+
+#[allow(dead_code)] // These are not used on every platform
+mod constructors {
+    use super::*;
+
+    impl RgbaIcon {
+        /// Creates an `Icon` from 32bpp RGBA data.
+        ///
+        /// 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> {
+            if rgba.len() % PIXEL_SIZE != 0 {
+                return Err(BadIcon::ByteCountNotDivisibleBy4 {
+                    byte_count: rgba.len(),
+                });
+            }
+            let pixel_count = rgba.len() / PIXEL_SIZE;
+            if pixel_count != (width * height) as usize {
+                Err(BadIcon::DimensionsVsPixelCount {
+                    width,
+                    height,
+                    width_x_height: (width * height) as usize,
+                    pixel_count,
+                })
+            } else {
+                Ok(RgbaIcon {
+                    rgba,
+                    width,
+                    height,
+                })
+            }
+        }
+    }
+
+    impl NoIcon {
+        pub fn from_rgba(rgba: Vec<u8>, width: u32, height: u32) -> Result<Self, BadIcon> {
+            // Create the rgba icon anyway to validate the input
+            let _ = RgbaIcon::from_rgba(rgba, width, height)?;
+            Ok(NoIcon)
+        }
+    }
+}
+
+/// An icon used for the window titlebar, taskbar, etc.
+#[derive(Clone)]
+pub struct Icon {
+    pub(crate) inner: PlatformIcon,
+}
+
+impl fmt::Debug for Icon {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
+        fmt::Debug::fmt(&self.inner, formatter)
+    }
+}
+
 impl Icon {
     /// Creates an `Icon` from 32bpp RGBA data.
     ///
     /// 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> {
-        if rgba.len() % PIXEL_SIZE != 0 {
-            return Err(BadIcon::ByteCountNotDivisibleBy4 {
-                byte_count: rgba.len(),
-            });
-        }
-        let pixel_count = rgba.len() / PIXEL_SIZE;
-        if pixel_count != (width * height) as usize {
-            Err(BadIcon::DimensionsVsPixelCount {
-                width,
-                height,
-                width_x_height: (width * height) as usize,
-                pixel_count,
-            })
-        } else {
-            Ok(Icon {
-                rgba,
-                width,
-                height,
-            })
-        }
+        Ok(Icon {
+            inner: PlatformIcon::from_rgba(rgba, width, height)?,
+        })
     }
 }

src/lib.rs

@@ -28,17 +28,17 @@
 //! Some user activity, like mouse movement, can generate both a [`WindowEvent`] *and* a
 //! [`DeviceEvent`]. You can also create and handle your own custom [`UserEvent`]s, if desired.
 //!
-//! You can retreive events by calling [`EventLoop::run`][event_loop_run]. This function will
+//! You can retrieve events by calling [`EventLoop::run`][event_loop_run]. This function will
 //! dispatch events for every [`Window`] that was created with that particular [`EventLoop`], and
 //! will run until the `control_flow` argument given to the closure is set to
 //! [`ControlFlow`]`::`[`Exit`], at which point [`Event`]`::`[`LoopDestroyed`] is emitted and the
 //! entire program terminates.
 //!
 //! Winit no longer uses a `EventLoop::poll_events() -> impl Iterator<Event>`-based event loop
-//! model, since that can't be implemented properly on web and mobile platforms and works poorly on
-//! most desktop platforms. However, this model can be re-implemented to an extent on desktops with
-//! [`EventLoopExtDesktop::run_return`]. See that method's documentation for more reasons about why
-//! it's discouraged, beyond mobile/web compatibility reasons.
+//! 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
+//! [`EventLoopExtRunReturn::run_return`]. See that method's documentation for more reasons about why
+//! it's discouraged, beyond compatibility reasons.
 //!
 //!
 //! ```no_run
@@ -73,14 +73,18 @@
 //!             // Application update code.
 //!
 //!             // 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 just render here instead.
 //!             window.request_redraw();
 //!         },
 //!         Event::RedrawRequested(_) => {
 //!             // Redraw the application.
 //!             //
-//!             // It's preferrable to render in this event rather than in MainEventsCleared, since
-//!             // rendering in here allows the program to gracefully handle redraws requested
-//!             // by the OS.
+//!             // It's preferable for applications that do not render continuously to render in
+//!             // this event rather than in MainEventsCleared, since rendering in here allows
+//!             // the program to gracefully handle redraws requested by the OS.
 //!         },
 //!         _ => ()
 //!     }
@@ -94,11 +98,18 @@
 //! # 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 (see the [`platform`] module), which in turn allows you
-//! to create an OpenGL/Vulkan/DirectX/Metal/etc. context that can be used to render graphics.
+//! retrieve the raw handle of the window (see the [`platform`] module and/or the
+//! [`raw_window_handle`] method), 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::WindowBuilder::with_visible) and explicitly make the
+//! window visible only once you're ready to render into it.
 //!
 //! [`EventLoop`]: event_loop::EventLoop
-//! [`EventLoopExtDesktop::run_return`]: ./platform/desktop/trait.EventLoopExtDesktop.html#tymethod.run_return
+//! [`EventLoopExtRunReturn::run_return`]: ./platform/run_return/trait.EventLoopExtRunReturn.html#tymethod.run_return
 //! [`EventLoop::new()`]: event_loop::EventLoop::new
 //! [event_loop_run]: event_loop::EventLoop::run
 //! [`ControlFlow`]: event_loop::ControlFlow
@@ -116,9 +127,10 @@
 //! [`UserEvent`]: event::Event::UserEvent
 //! [`LoopDestroyed`]: event::Event::LoopDestroyed
 //! [`platform`]: platform
+//! [`raw_window_handle`]: ./window/struct.Window.html#method.raw_window_handle
 
 #![deny(rust_2018_idioms)]
-#![deny(intra_doc_link_resolution_failure)]
+#![deny(broken_intra_doc_links)]
 
 #[allow(unused_imports)]
 #[macro_use]

src/monitor.rs

@@ -1,13 +1,13 @@
 //! Types useful for interacting with a user's monitors.
 //!
 //! If you want to get basic information about a monitor, you can use the [`MonitorHandle`][monitor_handle]
-//! type. This is retreived from one of the following methods, which return an iterator of
+//! type. This is retrieved from one of the following methods, which return an iterator of
 //! [`MonitorHandle`][monitor_handle]:
-//! - [`EventLoop::available_monitors`][loop_get]
+//! - [`EventLoopWindowTarget::available_monitors`][loop_get]
 //! - [`Window::available_monitors`][window_get].
 //!
 //! [monitor_handle]: crate::monitor::MonitorHandle
-//! [loop_get]: crate::event_loop::EventLoop::available_monitors
+//! [loop_get]: crate::event_loop::EventLoopWindowTarget::available_monitors
 //! [window_get]: crate::window::Window::available_monitors
 use crate::{
     dpi::{PhysicalPosition, PhysicalSize},

src/platform/android.rs

@@ -1,32 +1,39 @@
 #![cfg(any(target_os = "android"))]
 
-use crate::{EventLoop, Window, WindowBuilder};
-use std::os::raw::c_void;
+use crate::{
+    event_loop::{EventLoop, EventLoopWindowTarget},
+    window::{Window, WindowBuilder},
+};
+use ndk::configuration::Configuration;
+use ndk_glue::Rect;
 
 /// Additional methods on `EventLoop` that are specific to Android.
-pub trait EventLoopExtAndroid {
-    /// Makes it possible for glutin to register a callback when a suspend event happens on Android
-    fn set_suspend_callback(&self, cb: Option<Box<dyn Fn(bool) -> ()>>);
-}
+pub trait EventLoopExtAndroid {}
 
-impl EventLoopExtAndroid for EventLoop {
-    fn set_suspend_callback(&self, cb: Option<Box<dyn Fn(bool) -> ()>>) {
-        self.event_loop.set_suspend_callback(cb);
-    }
-}
+impl<T> EventLoopExtAndroid for EventLoop<T> {}
+
+/// Additional methods on `EventLoopWindowTarget` that are specific to Android.
+pub trait EventLoopWindowTargetExtAndroid {}
 
 /// Additional methods on `Window` that are specific to Android.
 pub trait WindowExtAndroid {
-    fn native_window(&self) -> *const c_void;
+    fn content_rect(&self) -> Rect;
+
+    fn config(&self) -> Configuration;
 }
 
 impl WindowExtAndroid for Window {
-    #[inline]
-    fn native_window(&self) -> *const c_void {
-        self.window.native_window()
+    fn content_rect(&self) -> Rect {
+        self.window.content_rect()
+    }
+
+    fn config(&self) -> Configuration {
+        self.window.config()
     }
 }
 
+impl<T> EventLoopWindowTargetExtAndroid for EventLoopWindowTarget<T> {}
+
 /// Additional methods on `WindowBuilder` that are specific to Android.
 pub trait WindowBuilderExtAndroid {}
 

src/platform/macos.rs

@@ -9,26 +9,6 @@ use crate::{
     window::{Window, WindowBuilder},
 };
 
-/// Corresponds to `NSRequestUserAttentionType`.
-#[derive(Debug, Clone, Copy, PartialEq)]
-pub enum RequestUserAttentionType {
-    /// Corresponds to `NSCriticalRequest`.
-    ///
-    /// Dock icon will bounce until the application is focused.
-    Critical,
-
-    /// Corresponds to `NSInformationalRequest`.
-    ///
-    /// Dock icon will bounce once.
-    Informational,
-}
-
-impl Default for RequestUserAttentionType {
-    fn default() -> Self {
-        RequestUserAttentionType::Critical
-    }
-}
-
 /// Additional methods on `Window` that are specific to MacOS.
 pub trait WindowExtMacOS {
     /// Returns a pointer to the cocoa `NSWindow` that is used by this window.
@@ -41,10 +21,6 @@ pub trait WindowExtMacOS {
     /// The pointer will become invalid when the `Window` is destroyed.
     fn ns_view(&self) -> *mut c_void;
 
-    /// Request user attention, causing the application's dock icon to bounce.
-    /// Note that this has no effect if the application is already focused.
-    fn request_user_attention(&self, request_type: RequestUserAttentionType);
-
     /// Returns whether or not the window is in simple fullscreen mode.
     fn simple_fullscreen(&self) -> bool;
 
@@ -56,6 +32,12 @@ pub trait WindowExtMacOS {
     /// And allows the user to have a fullscreen window without using another
     /// space or taking control over the entire monitor.
     fn set_simple_fullscreen(&self, fullscreen: bool) -> bool;
+
+    /// Returns whether or not the window has shadow.
+    fn has_shadow(&self) -> bool;
+
+    /// Sets whether or not the window has shadow.
+    fn set_has_shadow(&self, has_shadow: bool);
 }
 
 impl WindowExtMacOS for Window {
@@ -69,11 +51,6 @@ impl WindowExtMacOS for Window {
         self.window.ns_view()
     }
 
-    #[inline]
-    fn request_user_attention(&self, request_type: RequestUserAttentionType) {
-        self.window.request_user_attention(request_type)
-    }
-
     #[inline]
     fn simple_fullscreen(&self) -> bool {
         self.window.simple_fullscreen()
@@ -83,6 +60,16 @@ impl WindowExtMacOS for Window {
     fn set_simple_fullscreen(&self, fullscreen: bool) -> bool {
         self.window.set_simple_fullscreen(fullscreen)
     }
+
+    #[inline]
+    fn has_shadow(&self) -> bool {
+        self.window.has_shadow()
+    }
+
+    #[inline]
+    fn set_has_shadow(&self, has_shadow: bool) {
+        self.window.set_has_shadow(has_shadow)
+    }
 }
 
 /// Corresponds to `NSApplicationActivationPolicy`.
@@ -131,6 +118,7 @@ pub trait WindowBuilderExtMacOS {
     /// Build window with `resizeIncrements` property. Values must not be 0.
     fn with_resize_increments(self, increments: LogicalSize<f64>) -> WindowBuilder;
     fn with_disallow_hidpi(self, disallow_hidpi: bool) -> WindowBuilder;
+    fn with_has_shadow(self, has_shadow: bool) -> WindowBuilder;
 }
 
 impl WindowBuilderExtMacOS for WindowBuilder {
@@ -190,6 +178,12 @@ impl WindowBuilderExtMacOS for WindowBuilder {
         self.platform_specific.disallow_hidpi = disallow_hidpi;
         self
     }
+
+    #[inline]
+    fn with_has_shadow(mut self, has_shadow: bool) -> WindowBuilder {
+        self.platform_specific.has_shadow = has_shadow;
+        self
+    }
 }
 
 /// Additional methods on `MonitorHandle` that are specific to MacOS.
@@ -215,6 +209,8 @@ impl MonitorHandleExtMacOS for MonitorHandle {
 pub trait EventLoopWindowTargetExtMacOS {
     /// 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.
+    fn hide_other_applications(&self);
 }
 
 impl<T> EventLoopWindowTargetExtMacOS for EventLoopWindowTarget<T> {
@@ -223,4 +219,10 @@ impl<T> EventLoopWindowTargetExtMacOS for EventLoopWindowTarget<T> {
         let app: cocoa::base::id = unsafe { msg_send![cls, sharedApplication] };
         unsafe { msg_send![app, hide: 0] }
     }
+
+    fn hide_other_applications(&self) {
+        let cls = objc::runtime::Class::get("NSApplication").unwrap();
+        let app: cocoa::base::id = unsafe { msg_send![cls, sharedApplication] };
+        unsafe { msg_send![app, hideOtherApplications: 0] }
+    }
 }

src/platform/mod.rs

@@ -11,7 +11,7 @@
 //!
 //! And the following platform-specific module:
 //!
-//! - `desktop` (available on `windows`, `unix`, and `macos`)
+//! - `run_return` (available on `windows`, `unix`, `macos`, and `android`)
 //!
 //! However only the module corresponding to the platform you're compiling to will be available.
 
@@ -21,5 +21,5 @@ pub mod macos;
 pub mod unix;
 pub mod windows;
 
-pub mod desktop;
+pub mod run_return;
 pub mod web;

src/platform/run_return.rs

@@ -1,7 +1,12 @@
 #![cfg(any(
     target_os = "windows",
     target_os = "macos",
-    target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"
+    target_os = "android",
+    target_os = "linux",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "netbsd",
+    target_os = "openbsd"
 ))]
 
 use crate::{
@@ -9,8 +14,8 @@ use crate::{
     event_loop::{ControlFlow, EventLoop, EventLoopWindowTarget},
 };
 
-/// Additional methods on `EventLoop` that are specific to desktop platforms.
-pub trait EventLoopExtDesktop {
+/// Additional methods on `EventLoop` to return control flow to the caller.
+pub trait EventLoopExtRunReturn {
     /// A type provided by the user that can be passed through `Event::UserEvent`.
     type UserEvent;
 
@@ -20,12 +25,12 @@ pub trait EventLoopExtDesktop {
     /// control flow to the caller when `control_flow` is set to `ControlFlow::Exit`.
     ///
     /// # Caveats
-    /// Despite its apperance at first glance, this is *not* a perfect replacement for
+    /// Despite its appearance at first glance, this is *not* a perfect replacement for
     /// `poll_events`. For example, this function will not return on Windows or macOS while a
     /// window is getting resized, resulting in all application logic outside of the
     /// `event_handler` closure not running until the resize operation ends. Other OS operations
     /// may also result in such freezes. This behavior is caused by fundamental limitations in the
-    /// underyling OS APIs, which cannot be hidden by Winit without severe stability reprecussions.
+    /// underlying OS APIs, which cannot be hidden by `winit` without severe stability repercussions.
     ///
     /// You are strongly encouraged to use `run`, unless the use of this is absolutely necessary.
     fn run_return<F>(&mut self, event_handler: F)
@@ -37,7 +42,7 @@ pub trait EventLoopExtDesktop {
         );
 }
 
-impl<T> EventLoopExtDesktop for EventLoop<T> {
+impl<T> EventLoopExtRunReturn for EventLoop<T> {
     type UserEvent = T;
 
     fn run_return<F>(&mut self, event_handler: F)

src/platform/unix.rs

@@ -1,37 +1,49 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
+#![cfg(any(
+    target_os = "linux",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "netbsd",
+    target_os = "openbsd"
+))]
 
-use std::{os::raw, ptr, sync::Arc};
-
-use smithay_client_toolkit::window::{ButtonState as SCTKButtonState, Theme as SCTKTheme};
+use std::os::raw;
+#[cfg(feature = "x11")]
+use std::{ptr, sync::Arc};
 
 use crate::{
-    dpi::Size,
     event_loop::{EventLoop, EventLoopWindowTarget},
     monitor::MonitorHandle,
     window::{Window, WindowBuilder},
 };
 
+#[cfg(feature = "x11")]
+use crate::dpi::Size;
+#[cfg(feature = "x11")]
+use crate::platform_impl::x11::{ffi::XVisualInfo, XConnection};
 use crate::platform_impl::{
-    x11::{ffi::XVisualInfo, XConnection},
     EventLoop as LinuxEventLoop, EventLoopWindowTarget as LinuxEventLoopWindowTarget,
     Window as LinuxWindow,
 };
 
 // TODO: stupid hack so that glutin can do its work
 #[doc(hidden)]
+#[cfg(feature = "x11")]
 pub use crate::platform_impl::x11;
-
+#[cfg(feature = "x11")]
 pub use crate::platform_impl::{x11::util::WindowType as XWindowType, XNotSupported};
 
 /// Additional methods on `EventLoopWindowTarget` that are specific to Unix.
 pub trait EventLoopWindowTargetExtUnix {
     /// True if the `EventLoopWindowTarget` uses Wayland.
+    #[cfg(feature = "wayland")]
     fn is_wayland(&self) -> bool;
-    ///
+
     /// True if the `EventLoopWindowTarget` uses X11.
+    #[cfg(feature = "x11")]
     fn is_x11(&self) -> bool;
 
     #[doc(hidden)]
+    #[cfg(feature = "x11")]
     fn xlib_xconnection(&self) -> Option<Arc<XConnection>>;
 
     /// Returns a pointer to the `wl_display` object of wayland that is used by this
@@ -40,35 +52,42 @@ pub trait EventLoopWindowTargetExtUnix {
     /// Returns `None` if the `EventLoop` doesn't use wayland (if it uses xlib for example).
     ///
     /// The pointer will become invalid when the winit `EventLoop` is destroyed.
+    #[cfg(feature = "wayland")]
     fn wayland_display(&self) -> Option<*mut raw::c_void>;
 }
 
 impl<T> EventLoopWindowTargetExtUnix for EventLoopWindowTarget<T> {
     #[inline]
+    #[cfg(feature = "wayland")]
     fn is_wayland(&self) -> bool {
         self.p.is_wayland()
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn is_x11(&self) -> bool {
         !self.p.is_wayland()
     }
 
     #[inline]
     #[doc(hidden)]
+    #[cfg(feature = "x11")]
     fn xlib_xconnection(&self) -> Option<Arc<XConnection>> {
         match self.p {
             LinuxEventLoopWindowTarget::X(ref e) => Some(e.x_connection().clone()),
+            #[cfg(feature = "wayland")]
             _ => None,
         }
     }
 
     #[inline]
+    #[cfg(feature = "wayland")]
     fn wayland_display(&self) -> Option<*mut raw::c_void> {
         match self.p {
             LinuxEventLoopWindowTarget::Wayland(ref p) => {
                 Some(p.display().get_display_ptr() as *mut _)
             }
+            #[cfg(feature = "x11")]
             _ => None,
         }
     }
@@ -82,6 +101,7 @@ pub trait EventLoopExtUnix {
     ///
     /// If called outside the main thread. To initialize an X11 event loop outside
     /// the main thread, use [`new_x11_any_thread`](#tymethod.new_x11_any_thread).
+    #[cfg(feature = "x11")]
     fn new_x11() -> Result<Self, XNotSupported>
     where
         Self: Sized;
@@ -92,6 +112,7 @@ pub trait EventLoopExtUnix {
     ///
     /// If called outside the main thread. To initialize a Wayland event loop outside
     /// the main thread, use [`new_wayland_any_thread`](#tymethod.new_wayland_any_thread).
+    #[cfg(feature = "wayland")]
     fn new_wayland() -> Self
     where
         Self: Sized;
@@ -108,6 +129,7 @@ pub trait EventLoopExtUnix {
     ///
     /// This method bypasses the cross-platform compatibility requirement
     /// that `EventLoop` be created on the main thread.
+    #[cfg(feature = "x11")]
     fn new_x11_any_thread() -> Result<Self, XNotSupported>
     where
         Self: Sized;
@@ -116,6 +138,7 @@ pub trait EventLoopExtUnix {
     ///
     /// This method bypasses the cross-platform compatibility requirement
     /// that `EventLoop` be created on the main thread.
+    #[cfg(feature = "wayland")]
     fn new_wayland_any_thread() -> Self
     where
         Self: Sized;
@@ -135,11 +158,13 @@ impl<T> EventLoopExtUnix for EventLoop<T> {
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn new_x11_any_thread() -> Result<Self, XNotSupported> {
         LinuxEventLoop::new_x11_any_thread().map(wrap_ev)
     }
 
     #[inline]
+    #[cfg(feature = "wayland")]
     fn new_wayland_any_thread() -> Self {
         wrap_ev(
             LinuxEventLoop::new_wayland_any_thread()
@@ -149,11 +174,13 @@ impl<T> EventLoopExtUnix for EventLoop<T> {
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn new_x11() -> Result<Self, XNotSupported> {
         LinuxEventLoop::new_x11().map(wrap_ev)
     }
 
     #[inline]
+    #[cfg(feature = "wayland")]
     fn new_wayland() -> Self {
         wrap_ev(
             LinuxEventLoop::new_wayland()
@@ -168,6 +195,7 @@ pub trait WindowExtUnix {
     /// Returns the ID of the `Window` xlib object that is used by this window.
     ///
     /// Returns `None` if the window doesn't use xlib (if it uses wayland for example).
+    #[cfg(feature = "x11")]
     fn xlib_window(&self) -> Option<raw::c_ulong>;
 
     /// Returns a pointer to the `Display` object of xlib that is used by this window.
@@ -175,21 +203,22 @@ pub trait WindowExtUnix {
     /// Returns `None` if the window doesn't use xlib (if it uses wayland for example).
     ///
     /// The pointer will become invalid when the glutin `Window` is destroyed.
+    #[cfg(feature = "x11")]
     fn xlib_display(&self) -> Option<*mut raw::c_void>;
 
+    #[cfg(feature = "x11")]
     fn xlib_screen_id(&self) -> Option<raw::c_int>;
 
     #[doc(hidden)]
+    #[cfg(feature = "x11")]
     fn xlib_xconnection(&self) -> Option<Arc<XConnection>>;
 
-    /// Set window urgency hint (`XUrgencyHint`). Only relevant on X.
-    fn set_urgent(&self, is_urgent: bool);
-
     /// This function returns the underlying `xcb_connection_t` of an xlib `Display`.
     ///
     /// Returns `None` if the window doesn't use xlib (if it uses wayland for example).
     ///
     /// The pointer will become invalid when the glutin `Window` is destroyed.
+    #[cfg(feature = "x11")]
     fn xcb_connection(&self) -> Option<*mut raw::c_void>;
 
     /// Returns a pointer to the `wl_surface` object of wayland that is used by this window.
@@ -197,6 +226,7 @@ pub trait WindowExtUnix {
     /// Returns `None` if the window doesn't use wayland (if it uses xlib for example).
     ///
     /// The pointer will become invalid when the glutin `Window` is destroyed.
+    #[cfg(feature = "wayland")]
     fn wayland_surface(&self) -> Option<*mut raw::c_void>;
 
     /// Returns a pointer to the `wl_display` object of wayland that is used by this window.
@@ -204,9 +234,11 @@ pub trait WindowExtUnix {
     /// Returns `None` if the window doesn't use wayland (if it uses xlib for example).
     ///
     /// The pointer will become invalid when the glutin `Window` is destroyed.
+    #[cfg(feature = "wayland")]
     fn wayland_display(&self) -> Option<*mut raw::c_void>;
 
     /// Sets the color theme of the client side window decorations on wayland
+    #[cfg(feature = "wayland")]
     fn set_wayland_theme<T: Theme>(&self, theme: T);
 
     /// Check if the window is ready for drawing
@@ -221,73 +253,82 @@ pub trait WindowExtUnix {
 
 impl WindowExtUnix for Window {
     #[inline]
+    #[cfg(feature = "x11")]
     fn xlib_window(&self) -> Option<raw::c_ulong> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xlib_window()),
+            #[cfg(feature = "wayland")]
             _ => None,
         }
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn xlib_display(&self) -> Option<*mut raw::c_void> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xlib_display()),
+            #[cfg(feature = "wayland")]
             _ => None,
         }
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn xlib_screen_id(&self) -> Option<raw::c_int> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xlib_screen_id()),
+            #[cfg(feature = "wayland")]
             _ => None,
         }
     }
 
     #[inline]
     #[doc(hidden)]
+    #[cfg(feature = "x11")]
     fn xlib_xconnection(&self) -> Option<Arc<XConnection>> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xlib_xconnection()),
+            #[cfg(feature = "wayland")]
             _ => None,
         }
     }
 
     #[inline]
-    fn set_urgent(&self, is_urgent: bool) {
-        if let LinuxWindow::X(ref w) = self.window {
-            w.set_urgent(is_urgent);
-        }
-    }
-
-    #[inline]
+    #[cfg(feature = "x11")]
     fn xcb_connection(&self) -> Option<*mut raw::c_void> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xcb_connection()),
+            #[cfg(feature = "wayland")]
             _ => None,
         }
     }
 
     #[inline]
+    #[cfg(feature = "wayland")]
     fn wayland_surface(&self) -> Option<*mut raw::c_void> {
         match self.window {
             LinuxWindow::Wayland(ref w) => Some(w.surface().as_ref().c_ptr() as *mut _),
+            #[cfg(feature = "x11")]
             _ => None,
         }
     }
 
     #[inline]
+    #[cfg(feature = "wayland")]
     fn wayland_display(&self) -> Option<*mut raw::c_void> {
         match self.window {
-            LinuxWindow::Wayland(ref w) => Some(w.display().as_ref().c_ptr() as *mut _),
+            LinuxWindow::Wayland(ref w) => Some(w.display().get_display_ptr() as *mut _),
+            #[cfg(feature = "x11")]
             _ => None,
         }
     }
 
     #[inline]
+    #[cfg(feature = "wayland")]
     fn set_wayland_theme<T: Theme>(&self, theme: T) {
         match self.window {
-            LinuxWindow::Wayland(ref w) => w.set_theme(WaylandTheme(theme)),
+            LinuxWindow::Wayland(ref w) => w.set_theme(theme),
+            #[cfg(feature = "x11")]
             _ => {}
         }
     }
@@ -300,20 +341,28 @@ impl WindowExtUnix for Window {
 
 /// Additional methods on `WindowBuilder` that are specific to Unix.
 pub trait WindowBuilderExtUnix {
+    #[cfg(feature = "x11")]
     fn with_x11_visual<T>(self, visual_infos: *const T) -> Self;
+    #[cfg(feature = "x11")]
     fn with_x11_screen(self, screen_id: i32) -> Self;
 
     /// Build window with `WM_CLASS` hint; defaults to the name of the binary. Only relevant on X11.
+    #[cfg(feature = "x11")]
     fn with_class(self, class: String, instance: String) -> Self;
     /// Build window with override-redirect flag; defaults to false. Only relevant on X11.
+    #[cfg(feature = "x11")]
     fn with_override_redirect(self, override_redirect: bool) -> Self;
     /// Build window with `_NET_WM_WINDOW_TYPE` hints; defaults to `Normal`. Only relevant on X11.
+    #[cfg(feature = "x11")]
     fn with_x11_window_type(self, x11_window_type: Vec<XWindowType>) -> Self;
     /// Build window with `_GTK_THEME_VARIANT` hint set to the specified value. Currently only relevant on X11.
+    #[cfg(feature = "x11")]
     fn with_gtk_theme_variant(self, variant: String) -> Self;
     /// Build window with resize increment hint. Only implemented on X11.
+    #[cfg(feature = "x11")]
     fn with_resize_increments<S: Into<Size>>(self, increments: S) -> Self;
     /// Build window with base size hint. Only implemented on X11.
+    #[cfg(feature = "x11")]
     fn with_base_size<S: Into<Size>>(self, base_size: S) -> Self;
 
     /// Build window with a given application ID. It should match the `.desktop` file distributed with
@@ -321,60 +370,72 @@ pub trait WindowBuilderExtUnix {
     ///
     /// 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)
+    #[cfg(feature = "wayland")]
     fn with_app_id(self, app_id: String) -> Self;
 }
 
 impl WindowBuilderExtUnix for WindowBuilder {
     #[inline]
+    #[cfg(feature = "x11")]
     fn with_x11_visual<T>(mut self, visual_infos: *const T) -> Self {
-        self.platform_specific.visual_infos =
-            Some(unsafe { ptr::read(visual_infos as *const XVisualInfo) });
+        {
+            self.platform_specific.visual_infos =
+                Some(unsafe { ptr::read(visual_infos as *const XVisualInfo) });
+        }
         self
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn with_x11_screen(mut self, screen_id: i32) -> Self {
         self.platform_specific.screen_id = Some(screen_id);
         self
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn with_class(mut self, instance: String, class: String) -> Self {
         self.platform_specific.class = Some((instance, class));
         self
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn with_override_redirect(mut self, override_redirect: bool) -> Self {
         self.platform_specific.override_redirect = override_redirect;
         self
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn with_x11_window_type(mut self, x11_window_types: Vec<XWindowType>) -> Self {
         self.platform_specific.x11_window_types = x11_window_types;
         self
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn with_gtk_theme_variant(mut self, variant: String) -> Self {
         self.platform_specific.gtk_theme_variant = Some(variant);
         self
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn with_resize_increments<S: Into<Size>>(mut self, increments: S) -> Self {
         self.platform_specific.resize_increments = Some(increments.into());
         self
     }
 
     #[inline]
+    #[cfg(feature = "x11")]
     fn with_base_size<S: Into<Size>>(mut self, base_size: S) -> Self {
         self.platform_specific.base_size = Some(base_size.into());
         self
     }
 
     #[inline]
+    #[cfg(feature = "wayland")]
     fn with_app_id(mut self, app_id: String) -> Self {
         self.platform_specific.app_id = Some(app_id);
         self
@@ -394,80 +455,50 @@ impl MonitorHandleExtUnix for MonitorHandle {
     }
 }
 
-/// Wrapper for implementing SCTK's theme trait.
-struct WaylandTheme<T: Theme>(T);
-
+/// A theme for a Wayland's client side decorations.
+#[cfg(feature = "wayland")]
 pub trait Theme: Send + 'static {
-    /// Primary color of the scheme.
-    fn primary_color(&self, window_active: bool) -> [u8; 4];
+    /// Title bar color.
+    fn element_color(&self, element: Element, window_active: bool) -> ARGBColor;
 
-    /// Secondary color of the scheme.
-    fn secondary_color(&self, window_active: bool) -> [u8; 4];
+    /// Color for a given button part.
+    fn button_color(
+        &self,
+        button: Button,
+        state: ButtonState,
+        foreground: bool,
+        window_active: bool,
+    ) -> ARGBColor;
 
-    /// Color for the close button.
-    fn close_button_color(&self, status: ButtonState) -> [u8; 4];
-
-    /// Icon color for the close button, defaults to the secondary color.
-    #[allow(unused_variables)]
-    fn close_button_icon_color(&self, status: ButtonState) -> [u8; 4] {
-        self.secondary_color(true)
-    }
-
-    /// Background color for the maximize button.
-    fn maximize_button_color(&self, status: ButtonState) -> [u8; 4];
-
-    /// Icon color for the maximize button, defaults to the secondary color.
-    #[allow(unused_variables)]
-    fn maximize_button_icon_color(&self, status: ButtonState) -> [u8; 4] {
-        self.secondary_color(true)
-    }
-
-    /// Background color for the minimize button.
-    fn minimize_button_color(&self, status: ButtonState) -> [u8; 4];
-
-    /// Icon color for the minimize button, defaults to the secondary color.
-    #[allow(unused_variables)]
-    fn minimize_button_icon_color(&self, status: ButtonState) -> [u8; 4] {
-        self.secondary_color(true)
+    /// Font name and the size for the title bar.
+    ///
+    /// By default the font is `sans-serif` at the size of 17.
+    ///
+    /// Returning `None` means that title won't be drawn.
+    fn font(&self) -> Option<(String, f32)> {
+        // Not having any title isn't something desirable for the users, so setting it to
+        // something generic.
+        Some((String::from("sans-serif"), 17.))
     }
 }
 
-impl<T: Theme> SCTKTheme for WaylandTheme<T> {
-    fn get_primary_color(&self, active: bool) -> [u8; 4] {
-        self.0.primary_color(active)
-    }
+/// A button on Wayland's client side decorations.
+#[cfg(feature = "wayland")]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum Button {
+    /// Button that maximizes the window.
+    Maximize,
 
-    fn get_secondary_color(&self, active: bool) -> [u8; 4] {
-        self.0.secondary_color(active)
-    }
+    /// Button that minimizes the window.
+    Minimize,
 
-    fn get_close_button_color(&self, status: SCTKButtonState) -> [u8; 4] {
-        self.0.close_button_color(ButtonState::from_sctk(status))
-    }
-
-    fn get_close_button_icon_color(&self, status: SCTKButtonState) -> [u8; 4] {
-        self.0.close_button_color(ButtonState::from_sctk(status))
-    }
-
-    fn get_maximize_button_color(&self, status: SCTKButtonState) -> [u8; 4] {
-        self.0.maximize_button_color(ButtonState::from_sctk(status))
-    }
-
-    fn get_maximize_button_icon_color(&self, status: SCTKButtonState) -> [u8; 4] {
-        self.0
-            .maximize_button_icon_color(ButtonState::from_sctk(status))
-    }
-
-    fn get_minimize_button_color(&self, status: SCTKButtonState) -> [u8; 4] {
-        self.0.minimize_button_color(ButtonState::from_sctk(status))
-    }
-
-    fn get_minimize_button_icon_color(&self, status: SCTKButtonState) -> [u8; 4] {
-        self.0
-            .minimize_button_icon_color(ButtonState::from_sctk(status))
-    }
+    /// Button that closes the window.
+    Close,
 }
 
+/// A button state of the button on Wayland's client side decorations.
+#[cfg(feature = "wayland")]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum ButtonState {
     /// Button is being hovered over by pointer.
     Hovered,
@@ -477,12 +508,24 @@ pub enum ButtonState {
     Disabled,
 }
 
-impl ButtonState {
-    fn from_sctk(button_state: SCTKButtonState) -> Self {
-        match button_state {
-            SCTKButtonState::Hovered => Self::Hovered,
-            SCTKButtonState::Idle => Self::Idle,
-            SCTKButtonState::Disabled => Self::Disabled,
-        }
-    }
+#[cfg(feature = "wayland")]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum Element {
+    /// Bar itself.
+    Bar,
+
+    /// Separator between window and title bar.
+    Separator,
+
+    /// Title bar text.
+    Text,
+}
+
+#[cfg(feature = "wayland")]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct ARGBColor {
+    pub a: u8,
+    pub r: u8,
+    pub g: u8,
+    pub b: u8,
 }

src/platform/web.rs

@@ -14,6 +14,9 @@ use stdweb::web::html_element::CanvasElement;
 #[cfg(feature = "stdweb")]
 pub trait WindowExtStdweb {
     fn canvas(&self) -> CanvasElement;
+
+    /// Whether the browser reports the preferred color scheme to be "dark".
+    fn is_dark_mode(&self) -> bool;
 }
 
 #[cfg(feature = "web-sys")]
@@ -22,6 +25,9 @@ use web_sys::HtmlCanvasElement;
 #[cfg(feature = "web-sys")]
 pub trait WindowExtWebSys {
     fn canvas(&self) -> HtmlCanvasElement;
+
+    /// Whether the browser reports the preferred color scheme to be "dark".
+    fn is_dark_mode(&self) -> bool;
 }
 
 #[cfg(feature = "stdweb")]

src/platform/windows.rs

@@ -1,16 +1,19 @@
 #![cfg(target_os = "windows")]
 
 use std::os::raw::c_void;
+use std::path::Path;
 
 use libc;
+use winapi::shared::minwindef::WORD;
 use winapi::shared::windef::HWND;
 
 use crate::{
+    dpi::PhysicalSize,
     event::DeviceId,
     event_loop::EventLoop,
     monitor::MonitorHandle,
-    platform_impl::EventLoop as WindowsEventLoop,
-    window::{Icon, Window, WindowBuilder},
+    platform_impl::{EventLoop as WindowsEventLoop, WinIcon},
+    window::{BadIcon, Icon, Theme, Window, WindowBuilder},
 };
 
 /// Additional methods on `EventLoop` that are specific to Windows.
@@ -78,8 +81,8 @@ pub trait WindowExtWindows {
     /// This sets `ICON_BIG`. A good ceiling here is 256x256.
     fn set_taskbar_icon(&self, taskbar_icon: Option<Icon>);
 
-    /// Whether the system theme is currently Windows 10's "Dark Mode".
-    fn is_dark_mode(&self) -> bool;
+    /// Returns the current window theme.
+    fn theme(&self) -> Theme;
 }
 
 impl WindowExtWindows for Window {
@@ -99,8 +102,8 @@ impl WindowExtWindows for Window {
     }
 
     #[inline]
-    fn is_dark_mode(&self) -> bool {
-        self.window.is_dark_mode()
+    fn theme(&self) -> Theme {
+        self.window.theme()
     }
 }
 
@@ -114,6 +117,17 @@ pub trait WindowBuilderExtWindows {
 
     /// This sets `WS_EX_NOREDIRECTIONBITMAP`.
     fn with_no_redirection_bitmap(self, flag: bool) -> WindowBuilder;
+
+    /// Enables or disables drag and drop support (enabled by default). Will interfere with other crates
+    /// that use multi-threaded COM API (`CoInitializeEx` with `COINIT_MULTITHREADED` instead of
+    /// `COINIT_APARTMENTTHREADED`) on the same thread. Note that winit may still attempt to initialize
+    /// COM API regardless of this option. Currently only fullscreen mode does that, but there may be more in the future.
+    /// If you need COM API with `COINIT_MULTITHREADED` you must initialize it before calling any winit functions.
+    /// See https://docs.microsoft.com/en-us/windows/win32/api/objbase/nf-objbase-coinitialize#remarks for more information.
+    fn with_drag_and_drop(self, flag: bool) -> WindowBuilder;
+
+    /// Forces a theme or uses the system settings if `None` was provided.
+    fn with_theme(self, theme: Option<Theme>) -> WindowBuilder;
 }
 
 impl WindowBuilderExtWindows for WindowBuilder {
@@ -134,6 +148,18 @@ impl WindowBuilderExtWindows for WindowBuilder {
         self.platform_specific.no_redirection_bitmap = flag;
         self
     }
+
+    #[inline]
+    fn with_drag_and_drop(mut self, flag: bool) -> WindowBuilder {
+        self.platform_specific.drag_and_drop = flag;
+        self
+    }
+
+    #[inline]
+    fn with_theme(mut self, theme: Option<Theme>) -> WindowBuilder {
+        self.platform_specific.preferred_theme = theme;
+        self
+    }
 }
 
 /// Additional methods on `MonitorHandle` that are specific to Windows.
@@ -171,3 +197,40 @@ impl DeviceIdExtWindows for DeviceId {
         self.0.persistent_identifier()
     }
 }
+
+/// Additional methods on `Icon` that are specific to Windows.
+pub trait IconExtWindows: Sized {
+    /// Create an icon from a file path.
+    ///
+    /// Specify `size` to load a specific icon size from the file, or `None` to load the default
+    /// icon size from the file.
+    ///
+    /// In cases where the specified size does not exist in the file, Windows may perform scaling
+    /// to get an icon of the desired size.
+    fn from_path<P: AsRef<Path>>(path: P, size: Option<PhysicalSize<u32>>)
+        -> Result<Self, BadIcon>;
+
+    /// Create an icon from a resource embedded in this executable or library.
+    ///
+    /// Specify `size` to load a specific icon size from the file, or `None` to load the default
+    /// icon size from the file.
+    ///
+    /// In cases where the specified size does not exist in the file, Windows may perform scaling
+    /// to get an icon of the desired size.
+    fn from_resource(ordinal: WORD, size: Option<PhysicalSize<u32>>) -> Result<Self, BadIcon>;
+}
+
+impl IconExtWindows for Icon {
+    fn from_path<P: AsRef<Path>>(
+        path: P,
+        size: Option<PhysicalSize<u32>>,
+    ) -> Result<Self, BadIcon> {
+        let win_icon = WinIcon::from_path(path, size)?;
+        Ok(Icon { inner: win_icon })
+    }
+
+    fn from_resource(ordinal: WORD, size: Option<PhysicalSize<u32>>) -> Result<Self, BadIcon> {
+        let win_icon = WinIcon::from_resource(ordinal, size)?;
+        Ok(Icon { inner: win_icon })
+    }
+}

src/platform_impl/android/ffi.rs

@@ -1,122 +0,0 @@
-#![allow(dead_code)]
-#![allow(non_snake_case)]
-#![allow(non_camel_case_types)]
-#![allow(non_upper_case_globals)]
-
-use libc;
-use std::os::raw;
-
-#[link(name = "android")]
-#[link(name = "EGL")]
-#[link(name = "GLESv2")]
-extern "C" {}
-
-/**
- ** asset_manager.h
- **/
-pub type AAssetManager = raw::c_void;
-
-/**
- ** native_window.h
- **/
-pub type ANativeWindow = raw::c_void;
-
-extern "C" {
-    pub fn ANativeWindow_getHeight(window: *const ANativeWindow) -> libc::int32_t;
-    pub fn ANativeWindow_getWidth(window: *const ANativeWindow) -> libc::int32_t;
-}
-
-/**
- ** native_activity.h
- **/
-pub type JavaVM = ();
-pub type JNIEnv = ();
-pub type jobject = *const libc::c_void;
-
-pub type AInputQueue = (); // FIXME: wrong
-pub type ARect = (); // FIXME: wrong
-
-#[repr(C)]
-pub struct ANativeActivity {
-    pub callbacks: *mut ANativeActivityCallbacks,
-    pub vm: *mut JavaVM,
-    pub env: *mut JNIEnv,
-    pub clazz: jobject,
-    pub internalDataPath: *const libc::c_char,
-    pub externalDataPath: *const libc::c_char,
-    pub sdkVersion: libc::int32_t,
-    pub instance: *mut libc::c_void,
-    pub assetManager: *mut AAssetManager,
-    pub obbPath: *const libc::c_char,
-}
-
-#[repr(C)]
-pub struct ANativeActivityCallbacks {
-    pub onStart: extern "C" fn(*mut ANativeActivity),
-    pub onResume: extern "C" fn(*mut ANativeActivity),
-    pub onSaveInstanceState: extern "C" fn(*mut ANativeActivity, *mut libc::size_t),
-    pub onPause: extern "C" fn(*mut ANativeActivity),
-    pub onStop: extern "C" fn(*mut ANativeActivity),
-    pub onDestroy: extern "C" fn(*mut ANativeActivity),
-    pub onWindowFocusChanged: extern "C" fn(*mut ANativeActivity, libc::c_int),
-    pub onNativeWindowCreated: extern "C" fn(*mut ANativeActivity, *const ANativeWindow),
-    pub onNativeWindowResized: extern "C" fn(*mut ANativeActivity, *const ANativeWindow),
-    pub onNativeWindowRedrawNeeded: extern "C" fn(*mut ANativeActivity, *const ANativeWindow),
-    pub onNativeWindowDestroyed: extern "C" fn(*mut ANativeActivity, *const ANativeWindow),
-    pub onInputQueueCreated: extern "C" fn(*mut ANativeActivity, *mut AInputQueue),
-    pub onInputQueueDestroyed: extern "C" fn(*mut ANativeActivity, *mut AInputQueue),
-    pub onContentRectChanged: extern "C" fn(*mut ANativeActivity, *const ARect),
-    pub onConfigurationChanged: extern "C" fn(*mut ANativeActivity),
-    pub onLowMemory: extern "C" fn(*mut ANativeActivity),
-}
-
-/**
- ** looper.h
- **/
-pub type ALooper = ();
-
-#[link(name = "android")]
-extern "C" {
-    pub fn ALooper_forThread() -> *const ALooper;
-    pub fn ALooper_acquire(looper: *const ALooper);
-    pub fn ALooper_release(looper: *const ALooper);
-    pub fn ALooper_prepare(opts: libc::c_int) -> *const ALooper;
-    pub fn ALooper_pollOnce(
-        timeoutMillis: libc::c_int,
-        outFd: *mut libc::c_int,
-        outEvents: *mut libc::c_int,
-        outData: *mut *mut libc::c_void,
-    ) -> libc::c_int;
-    pub fn ALooper_pollAll(
-        timeoutMillis: libc::c_int,
-        outFd: *mut libc::c_int,
-        outEvents: *mut libc::c_int,
-        outData: *mut *mut libc::c_void,
-    ) -> libc::c_int;
-    pub fn ALooper_wake(looper: *const ALooper);
-    pub fn ALooper_addFd(
-        looper: *const ALooper,
-        fd: libc::c_int,
-        ident: libc::c_int,
-        events: libc::c_int,
-        callback: ALooper_callbackFunc,
-        data: *mut libc::c_void,
-    ) -> libc::c_int;
-    pub fn ALooper_removeFd(looper: *const ALooper, fd: libc::c_int) -> libc::c_int;
-}
-
-pub const ALOOPER_PREPARE_ALLOW_NON_CALLBACKS: libc::c_int = 1 << 0;
-
-pub const ALOOPER_POLL_WAKE: libc::c_int = -1;
-pub const ALOOPER_POLL_CALLBACK: libc::c_int = -2;
-pub const ALOOPER_POLL_TIMEOUT: libc::c_int = -3;
-pub const ALOOPER_POLL_ERROR: libc::c_int = -4;
-
-pub const ALOOPER_EVENT_INPUT: libc::c_int = 1 << 0;
-pub const ALOOPER_EVENT_OUTPUT: libc::c_int = 1 << 1;
-pub const ALOOPER_EVENT_ERROR: libc::c_int = 1 << 2;
-pub const ALOOPER_EVENT_HANGUP: libc::c_int = 1 << 3;
-pub const ALOOPER_EVENT_INVALID: libc::c_int = 1 << 4;
-
-pub type ALooper_callbackFunc =
-    extern "C" fn(libc::c_int, libc::c_int, *mut libc::c_void) -> libc::c_int;

src/platform_impl/ios/event_loop.rs

@@ -13,6 +13,7 @@ use crate::{
     event_loop::{
         ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootEventLoopWindowTarget,
     },
+    monitor::MonitorHandle as RootMonitorHandle,
     platform::ios::Idiom,
 };
 
@@ -24,7 +25,8 @@ use crate::platform_impl::platform::{
         CFRunLoopActivity, CFRunLoopAddObserver, CFRunLoopAddSource, CFRunLoopGetMain,
         CFRunLoopObserverCreate, CFRunLoopObserverRef, CFRunLoopSourceContext,
         CFRunLoopSourceCreate, CFRunLoopSourceInvalidate, CFRunLoopSourceRef,
-        CFRunLoopSourceSignal, CFRunLoopWakeUp, NSString, UIApplicationMain, UIUserInterfaceIdiom,
+        CFRunLoopSourceSignal, CFRunLoopWakeUp, NSStringRust, UIApplicationMain,
+        UIUserInterfaceIdiom,
     },
     monitor, view, MonitorHandle,
 };
@@ -49,6 +51,20 @@ pub struct EventLoopWindowTarget<T: 'static> {
     sender_to_clone: Sender<T>,
 }
 
+impl<T: 'static> EventLoopWindowTarget<T> {
+    pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
+        // guaranteed to be on main thread
+        unsafe { monitor::uiscreens() }
+    }
+
+    pub fn primary_monitor(&self) -> Option<RootMonitorHandle> {
+        // guaranteed to be on main thread
+        let monitor = unsafe { monitor::main_uiscreen() };
+
+        Some(RootMonitorHandle { inner: monitor })
+    }
+}
+
 pub struct EventLoop<T: 'static> {
     window_target: RootEventLoopWindowTarget<T>,
 }
@@ -105,7 +121,7 @@ impl<T: 'static> EventLoop<T> {
                 0,
                 ptr::null(),
                 nil,
-                NSString::alloc(nil).init_str("AppDelegate"),
+                NSStringRust::alloc(nil).init_str("AppDelegate"),
             );
             unreachable!()
         }
@@ -115,16 +131,6 @@ impl<T: 'static> EventLoop<T> {
         EventLoopProxy::new(self.window_target.p.sender_to_clone.clone())
     }
 
-    pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
-        // guaranteed to be on main thread
-        unsafe { monitor::uiscreens() }
-    }
-
-    pub fn primary_monitor(&self) -> MonitorHandle {
-        // guaranteed to be on main thread
-        unsafe { monitor::main_uiscreen() }
-    }
-
     pub fn window_target(&self) -> &RootEventLoopWindowTarget<T> {
         &self.window_target
     }

src/platform_impl/ios/ffi.rs

@@ -29,14 +29,14 @@ pub struct NSOperatingSystemVersion {
 }
 
 #[repr(C)]
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct CGPoint {
     pub x: CGFloat,
     pub y: CGFloat,
 }
 
 #[repr(C)]
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct CGSize {
     pub width: CGFloat,
     pub height: CGFloat,
@@ -52,7 +52,7 @@ impl CGSize {
 }
 
 #[repr(C)]
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct CGRect {
     pub origin: CGPoint,
     pub size: CGSize,
@@ -359,7 +359,10 @@ pub struct CFRunLoopSourceContext {
     pub perform: Option<extern "C" fn(*mut c_void)>,
 }
 
-pub trait NSString: Sized {
+// This is named NSStringRust rather than NSString because the "Debug View Heirarchy" feature of
+// Xcode requires a non-ambiguous reference to NSString for unclear reasons. This makes Xcode happy
+// so please test if you change the name back to NSString.
+pub trait NSStringRust: Sized {
     unsafe fn alloc(_: Self) -> id {
         msg_send![class!(NSString), alloc]
     }
@@ -370,7 +373,7 @@ pub trait NSString: Sized {
     unsafe fn UTF8String(self) -> *const c_char;
 }
 
-impl NSString for id {
+impl NSStringRust for id {
     unsafe fn initWithUTF8String_(self, c_string: *const c_char) -> id {
         msg_send![self, initWithUTF8String: c_string as id]
     }

src/platform_impl/ios/mod.rs

@@ -83,6 +83,8 @@ pub use self::{
     window::{PlatformSpecificWindowBuilderAttributes, Window, WindowId},
 };
 
+pub(crate) use crate::icon::NoIcon as PlatformIcon;
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId {
     uiscreen: ffi::id,

src/platform_impl/ios/view.rs

@@ -6,6 +6,7 @@ use objc::{
 };
 
 use crate::{
+    dpi::PhysicalPosition,
     event::{DeviceId as RootDeviceId, Event, Force, Touch, TouchPhase, WindowEvent},
     platform::ios::MonitorHandleExtIOS,
     platform_impl::platform::{
@@ -122,17 +123,26 @@ unsafe fn get_view_class(root_view_class: &'static Class) -> &'static Class {
 
                 let window: id = msg_send![object, window];
                 assert!(!window.is_null());
-                let bounds: CGRect = msg_send![window, bounds];
+                let window_bounds: CGRect = msg_send![window, bounds];
                 let screen: id = msg_send![window, screen];
                 let screen_space: id = msg_send![screen, coordinateSpace];
                 let screen_frame: CGRect =
-                    msg_send![object, convertRect:bounds toCoordinateSpace:screen_space];
-                let dpi_factor: CGFloat = msg_send![screen, scale];
+                    msg_send![object, convertRect:window_bounds toCoordinateSpace:screen_space];
+                let scale_factor: CGFloat = msg_send![screen, scale];
                 let size = crate::dpi::LogicalSize {
                     width: screen_frame.size.width as f64,
                     height: screen_frame.size.height as f64,
                 }
-                .to_physical(dpi_factor.into());
+                .to_physical(scale_factor.into());
+
+                // If the app is started in landscape, the view frame and window bounds can be mismatched.
+                // The view frame will be in portrait and the window bounds in landscape. So apply the
+                // window bounds to the view frame to make it consistent.
+                let view_frame: CGRect = msg_send![object, frame];
+                if view_frame != window_bounds {
+                    let () = msg_send![object, setFrame: window_bounds];
+                }
+
                 app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::WindowEvent {
                     window_id: RootWindowId(window.into()),
                     event: WindowEvent::Resized(size),
@@ -162,15 +172,15 @@ unsafe fn get_view_class(root_view_class: &'static Class) -> &'static Class {
                 // `setContentScaleFactor` may be called with a value of 0, which means "reset the
                 // content scale factor to a device-specific default value", so we can't use the
                 // parameter here. We can query the actual factor using the getter
-                let dpi_factor: CGFloat = msg_send![object, contentScaleFactor];
+                let scale_factor: CGFloat = msg_send![object, contentScaleFactor];
                 assert!(
-                    !dpi_factor.is_nan()
-                        && dpi_factor.is_finite()
-                        && dpi_factor.is_sign_positive()
-                        && dpi_factor > 0.0,
+                    !scale_factor.is_nan()
+                        && scale_factor.is_finite()
+                        && scale_factor.is_sign_positive()
+                        && scale_factor > 0.0,
                     "invalid scale_factor set on UIView",
                 );
-                let scale_factor: f64 = dpi_factor.into();
+                let scale_factor: f64 = scale_factor.into();
                 let bounds: CGRect = msg_send![object, bounds];
                 let screen: id = msg_send![window, screen];
                 let screen_space: id = msg_send![screen, coordinateSpace];
@@ -209,7 +219,7 @@ unsafe fn get_view_class(root_view_class: &'static Class) -> &'static Class {
                     if touch == nil {
                         break;
                     }
-                    let location: CGPoint = msg_send![touch, locationInView: nil];
+                    let logical_location: CGPoint = msg_send![touch, locationInView: nil];
                     let touch_type: UITouchType = msg_send![touch, type];
                     let force = if os_supports_force {
                         let trait_collection: id = msg_send![object, traitCollection];
@@ -248,12 +258,19 @@ unsafe fn get_view_class(root_view_class: &'static Class) -> &'static Class {
                         _ => panic!("unexpected touch phase: {:?}", phase as i32),
                     };
 
+                    let physical_location = {
+                        let scale_factor: CGFloat = msg_send![object, contentScaleFactor];
+                        PhysicalPosition::from_logical::<(f64, f64), f64>(
+                            (logical_location.x as _, logical_location.y as _),
+                            scale_factor,
+                        )
+                    };
                     touch_events.push(EventWrapper::StaticEvent(Event::WindowEvent {
                         window_id: RootWindowId(window.into()),
                         event: WindowEvent::Touch(Touch {
                             device_id: RootDeviceId(DeviceId { uiscreen }),
                             id: touch_id,
-                            location: (location.x as f64, location.y as f64).into(),
+                            location: physical_location,
                             force,
                             phase,
                         }),
@@ -511,7 +528,15 @@ pub unsafe fn create_window(
             msg_send![window, setScreen:video_mode.monitor().ui_screen()]
         }
         Some(Fullscreen::Borderless(ref monitor)) => {
-            msg_send![window, setScreen:monitor.ui_screen()]
+            let uiscreen: id = match &monitor {
+                Some(monitor) => monitor.ui_screen() as id,
+                None => {
+                    let uiscreen: id = msg_send![window, screen];
+                    uiscreen
+                }
+            };
+
+            msg_send![window, setScreen: uiscreen]
         }
         None => (),
     }

src/platform_impl/ios/window.rs

@@ -22,7 +22,9 @@ use crate::{
         },
         monitor, view, EventLoopWindowTarget, MonitorHandle,
     },
-    window::{CursorIcon, Fullscreen, WindowAttributes, WindowId as RootWindowId},
+    window::{
+        CursorIcon, Fullscreen, UserAttentionType, WindowAttributes, WindowId as RootWindowId,
+    },
 };
 
 pub struct Inner {
@@ -83,8 +85,8 @@ impl Inner {
                 x: safe_area.origin.x as f64,
                 y: safe_area.origin.y as f64,
             };
-            let dpi_factor = self.scale_factor();
-            Ok(position.to_physical(dpi_factor))
+            let scale_factor = self.scale_factor();
+            Ok(position.to_physical(scale_factor))
         }
     }
 
@@ -95,15 +97,15 @@ impl Inner {
                 x: screen_frame.origin.x as f64,
                 y: screen_frame.origin.y as f64,
             };
-            let dpi_factor = self.scale_factor();
-            Ok(position.to_physical(dpi_factor))
+            let scale_factor = self.scale_factor();
+            Ok(position.to_physical(scale_factor))
         }
     }
 
     pub fn set_outer_position(&self, physical_position: Position) {
         unsafe {
-            let dpi_factor = self.scale_factor();
-            let position = physical_position.to_logical::<f64>(dpi_factor);
+            let scale_factor = self.scale_factor();
+            let position = physical_position.to_logical::<f64>(scale_factor);
             let screen_frame = self.screen_frame();
             let new_screen_frame = CGRect {
                 origin: CGPoint {
@@ -119,30 +121,30 @@ impl Inner {
 
     pub fn inner_size(&self) -> PhysicalSize<u32> {
         unsafe {
-            let dpi_factor = self.scale_factor();
+            let scale_factor = self.scale_factor();
             let safe_area = self.safe_area_screen_space();
             let size = LogicalSize {
                 width: safe_area.size.width as f64,
                 height: safe_area.size.height as f64,
             };
-            size.to_physical(dpi_factor)
+            size.to_physical(scale_factor)
         }
     }
 
     pub fn outer_size(&self) -> PhysicalSize<u32> {
         unsafe {
-            let dpi_factor = self.scale_factor();
+            let scale_factor = self.scale_factor();
             let screen_frame = self.screen_frame();
             let size = LogicalSize {
                 width: screen_frame.size.width as f64,
                 height: screen_frame.size.height as f64,
             };
-            size.to_physical(dpi_factor)
+            size.to_physical(scale_factor)
         }
     }
 
     pub fn set_inner_size(&self, _size: Size) {
-        unimplemented!("not clear what `Window::set_inner_size` means on iOS");
+        warn!("not clear what `Window::set_inner_size` means on iOS");
     }
 
     pub fn set_min_inner_size(&self, _dimensions: Option<Size>) {
@@ -196,7 +198,9 @@ impl Inner {
                     let () = msg_send![uiscreen, setCurrentMode: video_mode.video_mode.screen_mode];
                     uiscreen
                 }
-                Some(Fullscreen::Borderless(monitor)) => monitor.ui_screen() as id,
+                Some(Fullscreen::Borderless(monitor)) => monitor
+                    .unwrap_or_else(|| self.current_monitor_inner())
+                    .ui_screen() as id,
                 None => {
                     warn!("`Window::set_fullscreen(None)` ignored on iOS");
                     return;
@@ -224,7 +228,7 @@ impl Inner {
 
     pub fn fullscreen(&self) -> Option<Fullscreen> {
         unsafe {
-            let monitor = self.current_monitor();
+            let monitor = self.current_monitor_inner();
             let uiscreen = monitor.inner.ui_screen();
             let screen_space_bounds = self.screen_frame();
             let screen_bounds: CGRect = msg_send![uiscreen, bounds];
@@ -235,7 +239,7 @@ impl Inner {
                 && screen_space_bounds.size.width == screen_bounds.size.width
                 && screen_space_bounds.size.height == screen_bounds.size.height
             {
-                Some(Fullscreen::Borderless(monitor))
+                Some(Fullscreen::Borderless(Some(monitor)))
             } else {
                 None
             }
@@ -258,7 +262,12 @@ impl Inner {
         warn!("`Window::set_ime_position` is ignored on iOS")
     }
 
-    pub fn current_monitor(&self) -> RootMonitorHandle {
+    pub fn request_user_attention(&self, _request_type: Option<UserAttentionType>) {
+        warn!("`Window::request_user_attention` is ignored on iOS")
+    }
+
+    // Allow directly accessing the current monitor internally without unwrapping.
+    fn current_monitor_inner(&self) -> RootMonitorHandle {
         unsafe {
             let uiscreen: id = msg_send![self.window, screen];
             RootMonitorHandle {
@@ -267,12 +276,17 @@ impl Inner {
         }
     }
 
+    pub fn current_monitor(&self) -> Option<RootMonitorHandle> {
+        Some(self.current_monitor_inner())
+    }
+
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         unsafe { monitor::uiscreens() }
     }
 
-    pub fn primary_monitor(&self) -> MonitorHandle {
-        unsafe { monitor::main_uiscreen() }
+    pub fn primary_monitor(&self) -> Option<RootMonitorHandle> {
+        let monitor = unsafe { monitor::main_uiscreen() };
+        Some(RootMonitorHandle { inner: monitor })
     }
 
     pub fn id(&self) -> WindowId {
@@ -347,16 +361,18 @@ impl Window {
                 Some(Fullscreen::Exclusive(ref video_mode)) => {
                     video_mode.video_mode.monitor.ui_screen() as id
                 }
-                Some(Fullscreen::Borderless(ref monitor)) => monitor.ui_screen() as id,
-                None => monitor::main_uiscreen().ui_screen(),
+                Some(Fullscreen::Borderless(Some(ref monitor))) => monitor.inner.ui_screen(),
+                Some(Fullscreen::Borderless(None)) | None => {
+                    monitor::main_uiscreen().ui_screen() as id
+                }
             };
 
             let screen_bounds: CGRect = msg_send![screen, bounds];
 
             let frame = match window_attributes.inner_size {
                 Some(dim) => {
-                    let dpi_factor = msg_send![screen, scale];
-                    let size = dim.to_logical::<f64>(dpi_factor);
+                    let scale_factor = msg_send![screen, scale];
+                    let size = dim.to_logical::<f64>(scale_factor);
                     CGRect {
                         origin: screen_bounds.origin,
                         size: CGSize {
@@ -400,8 +416,8 @@ impl Window {
 
             // Like the Windows and macOS backends, we send a `ScaleFactorChanged` and `Resized`
             // event on window creation if the DPI factor != 1.0
-            let dpi_factor: CGFloat = msg_send![view, contentScaleFactor];
-            let scale_factor: f64 = dpi_factor.into();
+            let scale_factor: CGFloat = msg_send![view, contentScaleFactor];
+            let scale_factor: f64 = scale_factor.into();
             if scale_factor != 1.0 {
                 let bounds: CGRect = msg_send![view, bounds];
                 let screen: id = msg_send![window, screen];

src/platform_impl/linux/mod.rs

@@ -1,12 +1,27 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
+#![cfg(any(
+    target_os = "linux",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "netbsd",
+    target_os = "openbsd"
+))]
 
-use std::{collections::VecDeque, env, ffi::CStr, fmt, mem::MaybeUninit, os::raw::*, sync::Arc};
+#[cfg(all(not(feature = "x11"), not(feature = "wayland")))]
+compile_error!("Please select a feature to build for unix: `x11`, `wayland`");
 
+#[cfg(feature = "wayland")]
+use std::error::Error;
+use std::{collections::VecDeque, env, fmt};
+#[cfg(feature = "x11")]
+use std::{ffi::CStr, mem::MaybeUninit, os::raw::*, sync::Arc};
+
+#[cfg(feature = "x11")]
 use parking_lot::Mutex;
 use raw_window_handle::RawWindowHandle;
-use smithay_client_toolkit::reexports::client::ConnectError;
 
+#[cfg(feature = "x11")]
 pub use self::x11::XNotSupported;
+#[cfg(feature = "x11")]
 use self::x11::{ffi::XVisualInfo, util::WindowType as XWindowType, XConnection, XError};
 use crate::{
     dpi::{PhysicalPosition, PhysicalSize, Position, Size},
@@ -15,10 +30,14 @@ use crate::{
     event_loop::{ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootELW},
     icon::Icon,
     monitor::{MonitorHandle as RootMonitorHandle, VideoMode as RootVideoMode},
-    window::{CursorIcon, Fullscreen, WindowAttributes},
+    window::{CursorIcon, Fullscreen, UserAttentionType, WindowAttributes},
 };
 
+pub(crate) use crate::icon::RgbaIcon as PlatformIcon;
+
+#[cfg(feature = "wayland")]
 pub mod wayland;
+#[cfg(feature = "x11")]
 pub mod x11;
 
 /// Environment variable specifying which backend should be used on unix platform.
@@ -32,175 +51,216 @@ const BACKEND_PREFERENCE_ENV_VAR: &str = "WINIT_UNIX_BACKEND";
 
 #[derive(Clone)]
 pub struct PlatformSpecificWindowBuilderAttributes {
+    #[cfg(feature = "x11")]
     pub visual_infos: Option<XVisualInfo>,
+    #[cfg(feature = "x11")]
     pub screen_id: Option<i32>,
+    #[cfg(feature = "x11")]
     pub resize_increments: Option<Size>,
+    #[cfg(feature = "x11")]
     pub base_size: Option<Size>,
+    #[cfg(feature = "x11")]
     pub class: Option<(String, String)>,
+    #[cfg(feature = "x11")]
     pub override_redirect: bool,
+    #[cfg(feature = "x11")]
     pub x11_window_types: Vec<XWindowType>,
+    #[cfg(feature = "x11")]
     pub gtk_theme_variant: Option<String>,
+    #[cfg(feature = "wayland")]
     pub app_id: Option<String>,
 }
 
 impl Default for PlatformSpecificWindowBuilderAttributes {
     fn default() -> Self {
         Self {
+            #[cfg(feature = "x11")]
             visual_infos: None,
+            #[cfg(feature = "x11")]
             screen_id: None,
+            #[cfg(feature = "x11")]
             resize_increments: None,
+            #[cfg(feature = "x11")]
             base_size: None,
+            #[cfg(feature = "x11")]
             class: None,
+            #[cfg(feature = "x11")]
             override_redirect: false,
+            #[cfg(feature = "x11")]
             x11_window_types: vec![XWindowType::Normal],
+            #[cfg(feature = "x11")]
             gtk_theme_variant: None,
+            #[cfg(feature = "wayland")]
             app_id: None,
         }
     }
 }
 
+#[cfg(feature = "x11")]
 lazy_static! {
     pub static ref X11_BACKEND: Mutex<Result<Arc<XConnection>, XNotSupported>> =
-        { Mutex::new(XConnection::new(Some(x_error_callback)).map(Arc::new)) };
+        Mutex::new(XConnection::new(Some(x_error_callback)).map(Arc::new));
 }
 
 #[derive(Debug, Clone)]
 pub enum OsError {
+    #[cfg(feature = "x11")]
     XError(XError),
+    #[cfg(feature = "x11")]
     XMisc(&'static str),
+    #[cfg(feature = "wayland")]
+    WaylandMisc(&'static str),
 }
 
 impl fmt::Display for OsError {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
-        match self {
-            OsError::XError(e) => f.pad(&e.description),
-            OsError::XMisc(e) => f.pad(e),
+    fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
+        match *self {
+            #[cfg(feature = "x11")]
+            OsError::XError(ref e) => _f.pad(&e.description),
+            #[cfg(feature = "x11")]
+            OsError::XMisc(ref e) => _f.pad(e),
+            #[cfg(feature = "wayland")]
+            OsError::WaylandMisc(ref e) => _f.pad(e),
         }
     }
 }
 
 pub enum Window {
+    #[cfg(feature = "x11")]
     X(x11::Window),
+    #[cfg(feature = "wayland")]
     Wayland(wayland::Window),
 }
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum WindowId {
+    #[cfg(feature = "x11")]
     X(x11::WindowId),
+    #[cfg(feature = "wayland")]
     Wayland(wayland::WindowId),
 }
 
 impl WindowId {
     pub unsafe fn dummy() -> Self {
-        WindowId::Wayland(wayland::WindowId::dummy())
+        #[cfg(feature = "wayland")]
+        return WindowId::Wayland(wayland::WindowId::dummy());
+        #[cfg(all(not(feature = "wayland"), feature = "x11"))]
+        return WindowId::X(x11::WindowId::dummy());
     }
 }
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum DeviceId {
+    #[cfg(feature = "x11")]
     X(x11::DeviceId),
+    #[cfg(feature = "wayland")]
     Wayland(wayland::DeviceId),
 }
 
 impl DeviceId {
     pub unsafe fn dummy() -> Self {
-        DeviceId::Wayland(wayland::DeviceId::dummy())
+        #[cfg(feature = "wayland")]
+        return DeviceId::Wayland(wayland::DeviceId::dummy());
+        #[cfg(all(not(feature = "wayland"), feature = "x11"))]
+        return DeviceId::X(x11::DeviceId::dummy());
     }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
 pub enum MonitorHandle {
+    #[cfg(feature = "x11")]
     X(x11::MonitorHandle),
+    #[cfg(feature = "wayland")]
     Wayland(wayland::MonitorHandle),
 }
 
+/// `x11_or_wayland!(match expr; Enum(foo) => foo.something())`
+/// expands to the equivalent of
+/// ```ignore
+/// match self {
+///    Enum::X(foo) => foo.something(),
+///    Enum::Wayland(foo) => foo.something(),
+/// }
+/// ```
+/// The result can be converted to another enum by adding `; as AnotherEnum`
+macro_rules! x11_or_wayland {
+    (match $what:expr; $enum:ident ( $($c1:tt)* ) => $x:expr; as $enum2:ident ) => {
+        match $what {
+            #[cfg(feature = "x11")]
+            $enum::X($($c1)*) => $enum2::X($x),
+            #[cfg(feature = "wayland")]
+            $enum::Wayland($($c1)*) => $enum2::Wayland($x),
+        }
+    };
+    (match $what:expr; $enum:ident ( $($c1:tt)* ) => $x:expr) => {
+        match $what {
+            #[cfg(feature = "x11")]
+            $enum::X($($c1)*) => $x,
+            #[cfg(feature = "wayland")]
+            $enum::Wayland($($c1)*) => $x,
+        }
+    };
+}
+
 impl MonitorHandle {
     #[inline]
     pub fn name(&self) -> Option<String> {
-        match self {
-            &MonitorHandle::X(ref m) => m.name(),
-            &MonitorHandle::Wayland(ref m) => m.name(),
-        }
+        x11_or_wayland!(match self; MonitorHandle(m) => m.name())
     }
 
     #[inline]
     pub fn native_identifier(&self) -> u32 {
-        match self {
-            &MonitorHandle::X(ref m) => m.native_identifier(),
-            &MonitorHandle::Wayland(ref m) => m.native_identifier(),
-        }
+        x11_or_wayland!(match self; MonitorHandle(m) => m.native_identifier())
     }
 
     #[inline]
     pub fn size(&self) -> PhysicalSize<u32> {
-        match self {
-            &MonitorHandle::X(ref m) => m.size(),
-            &MonitorHandle::Wayland(ref m) => m.size(),
-        }
+        x11_or_wayland!(match self; MonitorHandle(m) => m.size())
     }
 
     #[inline]
     pub fn position(&self) -> PhysicalPosition<i32> {
-        match self {
-            &MonitorHandle::X(ref m) => m.position(),
-            &MonitorHandle::Wayland(ref m) => m.position(),
-        }
+        x11_or_wayland!(match self; MonitorHandle(m) => m.position())
     }
 
     #[inline]
     pub fn scale_factor(&self) -> f64 {
-        match self {
-            &MonitorHandle::X(ref m) => m.scale_factor(),
-            &MonitorHandle::Wayland(ref m) => m.scale_factor() as f64,
-        }
+        x11_or_wayland!(match self; MonitorHandle(m) => m.scale_factor() as f64)
     }
 
     #[inline]
     pub fn video_modes(&self) -> Box<dyn Iterator<Item = RootVideoMode>> {
-        match self {
-            MonitorHandle::X(m) => Box::new(m.video_modes()),
-            MonitorHandle::Wayland(m) => Box::new(m.video_modes()),
-        }
+        x11_or_wayland!(match self; MonitorHandle(m) => Box::new(m.video_modes()))
     }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum VideoMode {
+    #[cfg(feature = "x11")]
     X(x11::VideoMode),
+    #[cfg(feature = "wayland")]
     Wayland(wayland::VideoMode),
 }
 
 impl VideoMode {
     #[inline]
     pub fn size(&self) -> PhysicalSize<u32> {
-        match self {
-            &VideoMode::X(ref m) => m.size(),
-            &VideoMode::Wayland(ref m) => m.size(),
-        }
+        x11_or_wayland!(match self; VideoMode(m) => m.size())
     }
 
     #[inline]
     pub fn bit_depth(&self) -> u16 {
-        match self {
-            &VideoMode::X(ref m) => m.bit_depth(),
-            &VideoMode::Wayland(ref m) => m.bit_depth(),
-        }
+        x11_or_wayland!(match self; VideoMode(m) => m.bit_depth())
     }
 
     #[inline]
     pub fn refresh_rate(&self) -> u16 {
-        match self {
-            &VideoMode::X(ref m) => m.refresh_rate(),
-            &VideoMode::Wayland(ref m) => m.refresh_rate(),
-        }
+        x11_or_wayland!(match self; VideoMode(m) => m.refresh_rate())
     }
 
     #[inline]
     pub fn monitor(&self) -> RootMonitorHandle {
-        match self {
-            &VideoMode::X(ref m) => m.monitor(),
-            &VideoMode::Wayland(ref m) => m.monitor(),
-        }
+        x11_or_wayland!(match self; VideoMode(m) => m.monitor())
     }
 }
 
@@ -212,9 +272,11 @@ impl Window {
         pl_attribs: PlatformSpecificWindowBuilderAttributes,
     ) -> Result<Self, RootOsError> {
         match *window_target {
+            #[cfg(feature = "wayland")]
             EventLoopWindowTarget::Wayland(ref window_target) => {
                 wayland::Window::new(window_target, attribs, pl_attribs).map(Window::Wayland)
             }
+            #[cfg(feature = "x11")]
             EventLoopWindowTarget::X(ref window_target) => {
                 x11::Window::new(window_target, attribs, pl_attribs).map(Window::X)
             }
@@ -223,232 +285,184 @@ impl Window {
 
     #[inline]
     pub fn id(&self) -> WindowId {
-        match self {
-            &Window::X(ref w) => WindowId::X(w.id()),
-            &Window::Wayland(ref w) => WindowId::Wayland(w.id()),
-        }
+        x11_or_wayland!(match self; Window(w) => w.id(); as WindowId)
     }
 
     #[inline]
     pub fn set_title(&self, title: &str) {
-        match self {
-            &Window::X(ref w) => w.set_title(title),
-            &Window::Wayland(ref w) => w.set_title(title),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_title(title));
     }
 
     #[inline]
     pub fn set_visible(&self, visible: bool) {
-        match self {
-            &Window::X(ref w) => w.set_visible(visible),
-            &Window::Wayland(ref w) => w.set_visible(visible),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_visible(visible))
     }
 
     #[inline]
     pub fn outer_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
-        match self {
-            &Window::X(ref w) => w.outer_position(),
-            &Window::Wayland(ref w) => w.outer_position(),
-        }
+        x11_or_wayland!(match self; Window(w) => w.outer_position())
     }
 
     #[inline]
     pub fn inner_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
-        match self {
-            &Window::X(ref m) => m.inner_position(),
-            &Window::Wayland(ref m) => m.inner_position(),
-        }
+        x11_or_wayland!(match self; Window(w) => w.inner_position())
     }
 
     #[inline]
     pub fn set_outer_position(&self, position: Position) {
-        match self {
-            &Window::X(ref w) => w.set_outer_position(position),
-            &Window::Wayland(ref w) => w.set_outer_position(position),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_outer_position(position))
     }
 
     #[inline]
     pub fn inner_size(&self) -> PhysicalSize<u32> {
-        match self {
-            &Window::X(ref w) => w.inner_size(),
-            &Window::Wayland(ref w) => w.inner_size(),
-        }
+        x11_or_wayland!(match self; Window(w) => w.inner_size())
     }
 
     #[inline]
     pub fn outer_size(&self) -> PhysicalSize<u32> {
-        match self {
-            &Window::X(ref w) => w.outer_size(),
-            &Window::Wayland(ref w) => w.outer_size(),
-        }
+        x11_or_wayland!(match self; Window(w) => w.outer_size())
     }
 
     #[inline]
     pub fn set_inner_size(&self, size: Size) {
-        match self {
-            &Window::X(ref w) => w.set_inner_size(size),
-            &Window::Wayland(ref w) => w.set_inner_size(size),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_inner_size(size))
     }
 
     #[inline]
     pub fn set_min_inner_size(&self, dimensions: Option<Size>) {
-        match self {
-            &Window::X(ref w) => w.set_min_inner_size(dimensions),
-            &Window::Wayland(ref w) => w.set_min_inner_size(dimensions),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_min_inner_size(dimensions))
     }
 
     #[inline]
     pub fn set_max_inner_size(&self, dimensions: Option<Size>) {
-        match self {
-            &Window::X(ref w) => w.set_max_inner_size(dimensions),
-            &Window::Wayland(ref w) => w.set_max_inner_size(dimensions),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_max_inner_size(dimensions))
     }
 
     #[inline]
     pub fn set_resizable(&self, resizable: bool) {
-        match self {
-            &Window::X(ref w) => w.set_resizable(resizable),
-            &Window::Wayland(ref w) => w.set_resizable(resizable),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_resizable(resizable))
     }
 
     #[inline]
     pub fn set_cursor_icon(&self, cursor: CursorIcon) {
-        match self {
-            &Window::X(ref w) => w.set_cursor_icon(cursor),
-            &Window::Wayland(ref w) => w.set_cursor_icon(cursor),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_cursor_icon(cursor))
     }
 
     #[inline]
     pub fn set_cursor_grab(&self, grab: bool) -> Result<(), ExternalError> {
-        match self {
-            &Window::X(ref window) => window.set_cursor_grab(grab),
-            &Window::Wayland(ref window) => window.set_cursor_grab(grab),
-        }
+        x11_or_wayland!(match self; Window(window) => window.set_cursor_grab(grab))
     }
 
     #[inline]
     pub fn set_cursor_visible(&self, visible: bool) {
-        match self {
-            &Window::X(ref window) => window.set_cursor_visible(visible),
-            &Window::Wayland(ref window) => window.set_cursor_visible(visible),
-        }
+        x11_or_wayland!(match self; Window(window) => window.set_cursor_visible(visible))
     }
 
     #[inline]
     pub fn scale_factor(&self) -> f64 {
-        match self {
-            &Window::X(ref w) => w.scale_factor(),
-            &Window::Wayland(ref w) => w.scale_factor() as f64,
-        }
+        x11_or_wayland!(match self; Window(w) => w.scale_factor() as f64)
     }
 
     #[inline]
     pub fn set_cursor_position(&self, position: Position) -> Result<(), ExternalError> {
-        match self {
-            &Window::X(ref w) => w.set_cursor_position(position),
-            &Window::Wayland(ref w) => w.set_cursor_position(position),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_cursor_position(position))
     }
 
     #[inline]
     pub fn set_maximized(&self, maximized: bool) {
-        match self {
-            &Window::X(ref w) => w.set_maximized(maximized),
-            &Window::Wayland(ref w) => w.set_maximized(maximized),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_maximized(maximized))
     }
 
     #[inline]
     pub fn set_minimized(&self, minimized: bool) {
-        match self {
-            &Window::X(ref w) => w.set_minimized(minimized),
-            &Window::Wayland(ref w) => w.set_minimized(minimized),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_minimized(minimized))
     }
 
     #[inline]
     pub fn fullscreen(&self) -> Option<Fullscreen> {
-        match self {
-            &Window::X(ref w) => w.fullscreen(),
-            &Window::Wayland(ref w) => w.fullscreen(),
-        }
+        x11_or_wayland!(match self; Window(w) => w.fullscreen())
     }
 
     #[inline]
     pub fn set_fullscreen(&self, monitor: Option<Fullscreen>) {
-        match self {
-            &Window::X(ref w) => w.set_fullscreen(monitor),
-            &Window::Wayland(ref w) => w.set_fullscreen(monitor),
-        }
+        x11_or_wayland!(match self; Window(w) => w.set_fullscreen(monitor))
     }
 
     #[inline]
     pub fn set_decorations(&self, decorations: bool) {
+        x11_or_wayland!(match self; Window(w) => w.set_decorations(decorations))
+    }
+
+    #[inline]
+    pub fn set_always_on_top(&self, _always_on_top: bool) {
         match self {
-            &Window::X(ref w) => w.set_decorations(decorations),
-            &Window::Wayland(ref w) => w.set_decorations(decorations),
+            #[cfg(feature = "x11")]
+            &Window::X(ref w) => w.set_always_on_top(_always_on_top),
+            #[cfg(feature = "wayland")]
+            _ => (),
         }
     }
 
     #[inline]
-    pub fn set_always_on_top(&self, always_on_top: bool) {
+    pub fn set_window_icon(&self, _window_icon: Option<Icon>) {
         match self {
-            &Window::X(ref w) => w.set_always_on_top(always_on_top),
-            &Window::Wayland(_) => (),
-        }
-    }
-
-    #[inline]
-    pub fn set_window_icon(&self, window_icon: Option<Icon>) {
-        match self {
-            &Window::X(ref w) => w.set_window_icon(window_icon),
-            &Window::Wayland(_) => (),
+            #[cfg(feature = "x11")]
+            &Window::X(ref w) => w.set_window_icon(_window_icon),
+            #[cfg(feature = "wayland")]
+            _ => (),
         }
     }
 
     #[inline]
     pub fn set_ime_position(&self, position: Position) {
+        x11_or_wayland!(match self; Window(w) => w.set_ime_position(position))
+    }
+
+    #[inline]
+    pub fn request_user_attention(&self, _request_type: Option<UserAttentionType>) {
         match self {
-            &Window::X(ref w) => w.set_ime_position(position),
-            &Window::Wayland(_) => (),
+            #[cfg(feature = "x11")]
+            &Window::X(ref w) => w.request_user_attention(_request_type),
+            #[cfg(feature = "wayland")]
+            _ => (),
         }
     }
 
     #[inline]
     pub fn request_redraw(&self) {
-        match self {
-            &Window::X(ref w) => w.request_redraw(),
-            &Window::Wayland(ref w) => w.request_redraw(),
-        }
+        x11_or_wayland!(match self; Window(w) => w.request_redraw())
     }
 
     #[inline]
-    pub fn current_monitor(&self) -> RootMonitorHandle {
+    pub fn current_monitor(&self) -> Option<RootMonitorHandle> {
         match self {
-            &Window::X(ref window) => RootMonitorHandle {
-                inner: MonitorHandle::X(window.current_monitor()),
-            },
-            &Window::Wayland(ref window) => RootMonitorHandle {
-                inner: MonitorHandle::Wayland(window.current_monitor()),
-            },
+            #[cfg(feature = "x11")]
+            &Window::X(ref window) => {
+                let current_monitor = MonitorHandle::X(window.current_monitor());
+                Some(RootMonitorHandle {
+                    inner: current_monitor,
+                })
+            }
+            #[cfg(feature = "wayland")]
+            &Window::Wayland(ref window) => {
+                let current_monitor = MonitorHandle::Wayland(window.current_monitor()?);
+                Some(RootMonitorHandle {
+                    inner: current_monitor,
+                })
+            }
         }
     }
 
     #[inline]
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         match self {
+            #[cfg(feature = "x11")]
             &Window::X(ref window) => window
                 .available_monitors()
                 .into_iter()
                 .map(MonitorHandle::X)
                 .collect(),
+            #[cfg(feature = "wayland")]
             &Window::Wayland(ref window) => window
                 .available_monitors()
                 .into_iter()
@@ -458,21 +472,31 @@ impl Window {
     }
 
     #[inline]
-    pub fn primary_monitor(&self) -> MonitorHandle {
+    pub fn primary_monitor(&self) -> Option<RootMonitorHandle> {
         match self {
-            &Window::X(ref window) => MonitorHandle::X(window.primary_monitor()),
-            &Window::Wayland(ref window) => MonitorHandle::Wayland(window.primary_monitor()),
+            #[cfg(feature = "x11")]
+            &Window::X(ref window) => {
+                let primary_monitor = MonitorHandle::X(window.primary_monitor());
+                Some(RootMonitorHandle {
+                    inner: primary_monitor,
+                })
+            }
+            #[cfg(feature = "wayland")]
+            &Window::Wayland(ref window) => window.primary_monitor(),
         }
     }
 
     pub fn raw_window_handle(&self) -> RawWindowHandle {
         match self {
+            #[cfg(feature = "x11")]
             &Window::X(ref window) => RawWindowHandle::Xlib(window.raw_window_handle()),
+            #[cfg(feature = "wayland")]
             &Window::Wayland(ref window) => RawWindowHandle::Wayland(window.raw_window_handle()),
         }
     }
 }
 
+#[cfg(feature = "x11")]
 unsafe extern "C" fn x_error_callback(
     display: *mut x11::ffi::Display,
     event: *mut x11::ffi::XErrorEvent,
@@ -506,21 +530,22 @@ unsafe extern "C" fn x_error_callback(
 }
 
 pub enum EventLoop<T: 'static> {
+    #[cfg(feature = "wayland")]
     Wayland(wayland::EventLoop<T>),
+    #[cfg(feature = "x11")]
     X(x11::EventLoop<T>),
 }
 
 pub enum EventLoopProxy<T: 'static> {
+    #[cfg(feature = "x11")]
     X(x11::EventLoopProxy<T>),
+    #[cfg(feature = "wayland")]
     Wayland(wayland::EventLoopProxy<T>),
 }
 
 impl<T: 'static> Clone for EventLoopProxy<T> {
     fn clone(&self) -> Self {
-        match self {
-            EventLoopProxy::X(proxy) => EventLoopProxy::X(proxy.clone()),
-            EventLoopProxy::Wayland(proxy) => EventLoopProxy::Wayland(proxy.clone()),
-        }
+        x11_or_wayland!(match self; EventLoopProxy(proxy) => proxy.clone(); as EventLoopProxy)
     }
 }
 
@@ -536,12 +561,18 @@ impl<T: 'static> EventLoop<T> {
             match env_var.as_str() {
                 "x11" => {
                     // TODO: propagate
+                    #[cfg(feature = "x11")]
                     return EventLoop::new_x11_any_thread()
                         .expect("Failed to initialize X11 backend");
+                    #[cfg(not(feature = "x11"))]
+                    panic!("x11 feature is not enabled")
                 }
                 "wayland" => {
+                    #[cfg(feature = "wayland")]
                     return EventLoop::new_wayland_any_thread()
                         .expect("Failed to initialize Wayland backend");
+                    #[cfg(not(feature = "wayland"))]
+                    panic!("wayland feature is not enabled");
                 }
                 _ => panic!(
                     "Unknown environment variable value for {}, try one of `x11`,`wayland`",
@@ -550,16 +581,23 @@ impl<T: 'static> EventLoop<T> {
             }
         }
 
+        #[cfg(feature = "wayland")]
         let wayland_err = match EventLoop::new_wayland_any_thread() {
             Ok(event_loop) => return event_loop,
             Err(err) => err,
         };
 
+        #[cfg(feature = "x11")]
         let x11_err = match EventLoop::new_x11_any_thread() {
             Ok(event_loop) => return event_loop,
             Err(err) => err,
         };
 
+        #[cfg(not(feature = "wayland"))]
+        let wayland_err = "backend disabled";
+        #[cfg(not(feature = "x11"))]
+        let x11_err = "backend disabled";
+
         let err_string = format!(
             "Failed to initialize any backend! Wayland status: {:?} X11 status: {:?}",
             wayland_err, x11_err,
@@ -567,41 +605,93 @@ impl<T: 'static> EventLoop<T> {
         panic!(err_string);
     }
 
-    pub fn new_wayland() -> Result<EventLoop<T>, ConnectError> {
+    #[cfg(feature = "wayland")]
+    pub fn new_wayland() -> Result<EventLoop<T>, Box<dyn Error>> {
         assert_is_main_thread("new_wayland_any_thread");
 
         EventLoop::new_wayland_any_thread()
     }
 
-    pub fn new_wayland_any_thread() -> Result<EventLoop<T>, ConnectError> {
+    #[cfg(feature = "wayland")]
+    pub fn new_wayland_any_thread() -> Result<EventLoop<T>, Box<dyn Error>> {
         wayland::EventLoop::new().map(EventLoop::Wayland)
     }
 
+    #[cfg(feature = "x11")]
     pub fn new_x11() -> Result<EventLoop<T>, XNotSupported> {
         assert_is_main_thread("new_x11_any_thread");
 
         EventLoop::new_x11_any_thread()
     }
 
+    #[cfg(feature = "x11")]
     pub fn new_x11_any_thread() -> Result<EventLoop<T>, XNotSupported> {
-        X11_BACKEND
-            .lock()
-            .as_ref()
-            .map(Arc::clone)
-            .map(x11::EventLoop::new)
-            .map(EventLoop::X)
-            .map_err(|err| err.clone())
+        let xconn = match X11_BACKEND.lock().as_ref() {
+            Ok(xconn) => xconn.clone(),
+            Err(err) => return Err(err.clone()),
+        };
+
+        Ok(EventLoop::X(x11::EventLoop::new(xconn)))
+    }
+
+    pub fn create_proxy(&self) -> EventLoopProxy<T> {
+        x11_or_wayland!(match self; EventLoop(evlp) => evlp.create_proxy(); as EventLoopProxy)
+    }
+
+    pub fn run_return<F>(&mut self, callback: F)
+    where
+        F: FnMut(crate::event::Event<'_, T>, &RootELW<T>, &mut ControlFlow),
+    {
+        x11_or_wayland!(match self; EventLoop(evlp) => evlp.run_return(callback))
+    }
+
+    pub fn run<F>(self, callback: F) -> !
+    where
+        F: 'static + FnMut(crate::event::Event<'_, T>, &RootELW<T>, &mut ControlFlow),
+    {
+        x11_or_wayland!(match self; EventLoop(evlp) => evlp.run(callback))
+    }
+
+    pub fn window_target(&self) -> &crate::event_loop::EventLoopWindowTarget<T> {
+        x11_or_wayland!(match self; EventLoop(evl) => evl.window_target())
+    }
+}
+
+impl<T: 'static> EventLoopProxy<T> {
+    pub fn send_event(&self, event: T) -> Result<(), EventLoopClosed<T>> {
+        x11_or_wayland!(match self; EventLoopProxy(proxy) => proxy.send_event(event))
+    }
+}
+
+pub enum EventLoopWindowTarget<T> {
+    #[cfg(feature = "wayland")]
+    Wayland(wayland::EventLoopWindowTarget<T>),
+    #[cfg(feature = "x11")]
+    X(x11::EventLoopWindowTarget<T>),
+}
+
+impl<T> EventLoopWindowTarget<T> {
+    #[inline]
+    pub fn is_wayland(&self) -> bool {
+        match *self {
+            #[cfg(feature = "wayland")]
+            EventLoopWindowTarget::Wayland(_) => true,
+            #[cfg(feature = "x11")]
+            _ => false,
+        }
     }
 
     #[inline]
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         match *self {
-            EventLoop::Wayland(ref evlp) => evlp
+            #[cfg(feature = "wayland")]
+            EventLoopWindowTarget::Wayland(ref evlp) => evlp
                 .available_monitors()
                 .into_iter()
                 .map(MonitorHandle::Wayland)
                 .collect(),
-            EventLoop::X(ref evlp) => evlp
+            #[cfg(feature = "x11")]
+            EventLoopWindowTarget::X(ref evlp) => evlp
                 .x_connection()
                 .available_monitors()
                 .into_iter()
@@ -611,68 +701,17 @@ impl<T: 'static> EventLoop<T> {
     }
 
     #[inline]
-    pub fn primary_monitor(&self) -> MonitorHandle {
+    pub fn primary_monitor(&self) -> Option<RootMonitorHandle> {
         match *self {
-            EventLoop::Wayland(ref evlp) => MonitorHandle::Wayland(evlp.primary_monitor()),
-            EventLoop::X(ref evlp) => MonitorHandle::X(evlp.x_connection().primary_monitor()),
-        }
-    }
-
-    pub fn create_proxy(&self) -> EventLoopProxy<T> {
-        match *self {
-            EventLoop::Wayland(ref evlp) => EventLoopProxy::Wayland(evlp.create_proxy()),
-            EventLoop::X(ref evlp) => EventLoopProxy::X(evlp.create_proxy()),
-        }
-    }
-
-    pub fn run_return<F>(&mut self, callback: F)
-    where
-        F: FnMut(crate::event::Event<'_, T>, &RootELW<T>, &mut ControlFlow),
-    {
-        match *self {
-            EventLoop::Wayland(ref mut evlp) => evlp.run_return(callback),
-            EventLoop::X(ref mut evlp) => evlp.run_return(callback),
-        }
-    }
-
-    pub fn run<F>(self, callback: F) -> !
-    where
-        F: 'static + FnMut(crate::event::Event<'_, T>, &RootELW<T>, &mut ControlFlow),
-    {
-        match self {
-            EventLoop::Wayland(evlp) => evlp.run(callback),
-            EventLoop::X(evlp) => evlp.run(callback),
-        }
-    }
-
-    pub fn window_target(&self) -> &crate::event_loop::EventLoopWindowTarget<T> {
-        match *self {
-            EventLoop::Wayland(ref evl) => evl.window_target(),
-            EventLoop::X(ref evl) => evl.window_target(),
-        }
-    }
-}
-
-impl<T: 'static> EventLoopProxy<T> {
-    pub fn send_event(&self, event: T) -> Result<(), EventLoopClosed<T>> {
-        match *self {
-            EventLoopProxy::Wayland(ref proxy) => proxy.send_event(event),
-            EventLoopProxy::X(ref proxy) => proxy.send_event(event),
-        }
-    }
-}
-
-pub enum EventLoopWindowTarget<T> {
-    Wayland(wayland::EventLoopWindowTarget<T>),
-    X(x11::EventLoopWindowTarget<T>),
-}
-
-impl<T> EventLoopWindowTarget<T> {
-    #[inline]
-    pub fn is_wayland(&self) -> bool {
-        match *self {
-            EventLoopWindowTarget::Wayland(_) => true,
-            EventLoopWindowTarget::X(_) => false,
+            #[cfg(feature = "wayland")]
+            EventLoopWindowTarget::Wayland(ref evlp) => evlp.primary_monitor(),
+            #[cfg(feature = "x11")]
+            EventLoopWindowTarget::X(ref evlp) => {
+                let primary_monitor = MonitorHandle::X(evlp.x_connection().primary_monitor());
+                Some(RootMonitorHandle {
+                    inner: primary_monitor,
+                })
+            }
         }
     }
 }
@@ -724,7 +763,5 @@ fn is_main_thread() -> bool {
 
 #[cfg(target_os = "netbsd")]
 fn is_main_thread() -> bool {
-    use libc::_lwp_self;
-
-    unsafe { _lwp_self() == 1 }
+    std::thread::current().name() == Some("main")
 }

src/platform_impl/linux/wayland/env.rs

@@ -0,0 +1,149 @@
+//! SCTK environment setup.
+
+use sctk::reexports::client::protocol::wl_compositor::WlCompositor;
+use sctk::reexports::client::protocol::wl_output::WlOutput;
+use sctk::reexports::protocols::unstable::xdg_shell::v6::client::zxdg_shell_v6::ZxdgShellV6;
+use sctk::reexports::client::protocol::wl_seat::WlSeat;
+use sctk::reexports::protocols::unstable::xdg_decoration::v1::client::zxdg_decoration_manager_v1::ZxdgDecorationManagerV1;
+use sctk::reexports::client::protocol::wl_shell::WlShell;
+use sctk::reexports::client::protocol::wl_subcompositor::WlSubcompositor;
+use sctk::reexports::client::{Attached, DispatchData};
+use sctk::reexports::client::protocol::wl_shm::WlShm;
+use sctk::reexports::protocols::xdg_shell::client::xdg_wm_base::XdgWmBase;
+use sctk::reexports::protocols::unstable::relative_pointer::v1::client::zwp_relative_pointer_manager_v1::ZwpRelativePointerManagerV1;
+use sctk::reexports::protocols::unstable::pointer_constraints::v1::client::zwp_pointer_constraints_v1::ZwpPointerConstraintsV1;
+use sctk::reexports::protocols::unstable::text_input::v3::client::zwp_text_input_manager_v3::ZwpTextInputManagerV3;
+
+use sctk::environment::{Environment, SimpleGlobal};
+use sctk::output::{OutputHandler, OutputHandling, OutputInfo, OutputStatusListener};
+use sctk::seat::{SeatData, SeatHandler, SeatHandling, SeatListener};
+use sctk::shell::{Shell, ShellHandler, ShellHandling};
+use sctk::shm::ShmHandler;
+
+/// Set of extra features that are supported by the compositor.
+#[derive(Debug, Clone, Copy)]
+pub struct WindowingFeatures {
+    cursor_grab: bool,
+}
+
+impl WindowingFeatures {
+    /// Create `WindowingFeatures` based on the presented interfaces.
+    pub fn new(env: &Environment<WinitEnv>) -> Self {
+        let cursor_grab = env.get_global::<ZwpPointerConstraintsV1>().is_some();
+        Self { cursor_grab }
+    }
+
+    pub fn cursor_grab(&self) -> bool {
+        self.cursor_grab
+    }
+}
+
+sctk::environment!(WinitEnv,
+    singles = [
+        WlShm => shm,
+        WlCompositor => compositor,
+        WlSubcompositor => subcompositor,
+        WlShell => shell,
+        XdgWmBase => shell,
+        ZxdgShellV6 => shell,
+        ZxdgDecorationManagerV1 => decoration_manager,
+        ZwpRelativePointerManagerV1 => relative_pointer_manager,
+        ZwpPointerConstraintsV1 => pointer_constraints,
+        ZwpTextInputManagerV3 => text_input_manager,
+    ],
+    multis = [
+        WlSeat => seats,
+        WlOutput => outputs,
+    ]
+);
+
+/// The environment that we utilize.
+pub struct WinitEnv {
+    seats: SeatHandler,
+
+    outputs: OutputHandler,
+
+    shm: ShmHandler,
+
+    compositor: SimpleGlobal<WlCompositor>,
+
+    subcompositor: SimpleGlobal<WlSubcompositor>,
+
+    shell: ShellHandler,
+
+    relative_pointer_manager: SimpleGlobal<ZwpRelativePointerManagerV1>,
+
+    pointer_constraints: SimpleGlobal<ZwpPointerConstraintsV1>,
+
+    text_input_manager: SimpleGlobal<ZwpTextInputManagerV3>,
+
+    decoration_manager: SimpleGlobal<ZxdgDecorationManagerV1>,
+}
+
+impl WinitEnv {
+    pub fn new() -> Self {
+        // Output tracking for available_monitors, etc.
+        let outputs = OutputHandler::new();
+
+        // Keyboard/Pointer/Touch input.
+        let seats = SeatHandler::new();
+
+        // Essential globals.
+        let shm = ShmHandler::new();
+        let compositor = SimpleGlobal::new();
+        let subcompositor = SimpleGlobal::new();
+
+        // Gracefully handle shell picking, since SCTK automatically supports multiple
+        // backends.
+        let shell = ShellHandler::new();
+
+        // Server side decorations.
+        let decoration_manager = SimpleGlobal::new();
+
+        // Device events for pointer.
+        let relative_pointer_manager = SimpleGlobal::new();
+
+        // Pointer grab functionality.
+        let pointer_constraints = SimpleGlobal::new();
+
+        // IME handling.
+        let text_input_manager = SimpleGlobal::new();
+
+        Self {
+            seats,
+            outputs,
+            shm,
+            compositor,
+            subcompositor,
+            shell,
+            decoration_manager,
+            relative_pointer_manager,
+            pointer_constraints,
+            text_input_manager,
+        }
+    }
+}
+
+impl ShellHandling for WinitEnv {
+    fn get_shell(&self) -> Option<Shell> {
+        self.shell.get_shell()
+    }
+}
+
+impl SeatHandling for WinitEnv {
+    fn listen<F: FnMut(Attached<WlSeat>, &SeatData, DispatchData<'_>) + 'static>(
+        &mut self,
+        f: F,
+    ) -> SeatListener {
+        self.seats.listen(f)
+    }
+}
+
+impl OutputHandling for WinitEnv {
+    fn listen<F: FnMut(WlOutput, &OutputInfo, DispatchData<'_>) + 'static>(
+        &mut self,
+        f: F,
+    ) -> OutputStatusListener {
+        self.outputs.listen(f)
+    }
+}

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

@@ -0,0 +1,535 @@
+use std::cell::RefCell;
+use std::collections::HashMap;
+use std::error::Error;
+use std::process;
+use std::rc::Rc;
+use std::time::{Duration, Instant};
+
+use sctk::reexports::client::protocol::wl_compositor::WlCompositor;
+use sctk::reexports::client::protocol::wl_shm::WlShm;
+use sctk::reexports::client::Display;
+
+use sctk::reexports::calloop;
+
+use sctk::environment::Environment;
+use sctk::seat::pointer::{ThemeManager, ThemeSpec};
+use sctk::WaylandSource;
+
+use crate::event::{Event, StartCause, WindowEvent};
+use crate::event_loop::{ControlFlow, EventLoopWindowTarget as RootEventLoopWindowTarget};
+use crate::platform_impl::platform::sticky_exit_callback;
+
+use super::env::{WindowingFeatures, WinitEnv};
+use super::output::OutputManager;
+use super::seat::SeatManager;
+use super::window::shim::{self, WindowUpdate};
+use super::{DeviceId, WindowId};
+
+mod proxy;
+mod sink;
+mod state;
+
+pub use proxy::EventLoopProxy;
+pub use state::WinitState;
+
+use sink::EventSink;
+
+pub struct EventLoopWindowTarget<T> {
+    /// Wayland display.
+    pub display: Display,
+
+    /// Environment to handle object creation, etc.
+    pub env: Environment<WinitEnv>,
+
+    /// Event loop handle.
+    pub event_loop_handle: calloop::LoopHandle<WinitState>,
+
+    /// Output manager.
+    pub output_manager: OutputManager,
+
+    /// State that we share across callbacks.
+    pub state: RefCell<WinitState>,
+
+    /// Wayland source.
+    pub wayland_source: Rc<calloop::Source<WaylandSource>>,
+
+    /// A proxy to wake up event loop.
+    pub event_loop_awakener: calloop::ping::Ping,
+
+    /// The available windowing features.
+    pub windowing_features: WindowingFeatures,
+
+    /// Theme manager to manage cursors.
+    ///
+    /// It's being shared amoung all windows to avoid loading
+    /// multiple similar themes.
+    pub theme_manager: ThemeManager,
+
+    _marker: std::marker::PhantomData<T>,
+}
+
+pub struct EventLoop<T: 'static> {
+    /// Event loop.
+    event_loop: calloop::EventLoop<WinitState>,
+
+    /// Wayland display.
+    display: Display,
+
+    /// Pending user events.
+    pending_user_events: Rc<RefCell<Vec<T>>>,
+
+    /// Sender of user events.
+    user_events_sender: calloop::channel::Sender<T>,
+
+    /// Wayland source of events.
+    wayland_source: Rc<calloop::Source<WaylandSource>>,
+
+    /// Window target.
+    window_target: RootEventLoopWindowTarget<T>,
+
+    /// Output manager.
+    _seat_manager: SeatManager,
+}
+
+impl<T: 'static> EventLoop<T> {
+    pub fn new() -> Result<EventLoop<T>, Box<dyn Error>> {
+        // Connect to wayland server and setup event queue.
+        let display = Display::connect_to_env()?;
+        let mut event_queue = display.create_event_queue();
+        let display_proxy = display.attach(event_queue.token());
+
+        // Setup environment.
+        let env = Environment::new(&display_proxy, &mut event_queue, WinitEnv::new())?;
+
+        // Create event loop.
+        let event_loop = calloop::EventLoop::<WinitState>::new()?;
+        // Build windowing features.
+        let windowing_features = WindowingFeatures::new(&env);
+
+        // Create a theme manager.
+        let compositor = env.require_global::<WlCompositor>();
+        let shm = env.require_global::<WlShm>();
+        let theme_manager = ThemeManager::init(ThemeSpec::System, compositor, shm);
+
+        // Setup theme seat and output managers.
+        let seat_manager = SeatManager::new(&env, event_loop.handle(), theme_manager.clone());
+        let output_manager = OutputManager::new(&env);
+
+        // A source of events that we plug into our event loop.
+        let wayland_source = WaylandSource::new(event_queue).quick_insert(event_loop.handle())?;
+        let wayland_source = Rc::new(wayland_source);
+
+        // A source of user events.
+        let pending_user_events = Rc::new(RefCell::new(Vec::new()));
+        let pending_user_events_clone = pending_user_events.clone();
+        let (user_events_sender, user_events_channel) = calloop::channel::channel();
+
+        // User events channel.
+        event_loop
+            .handle()
+            .insert_source(user_events_channel, move |event, _, _| {
+                if let calloop::channel::Event::Msg(msg) = event {
+                    pending_user_events_clone.borrow_mut().push(msg);
+                }
+            })?;
+
+        // An event's loop awakener to wake up for window events from winit's windows.
+        let (event_loop_awakener, event_loop_awakener_source) = calloop::ping::make_ping()?;
+
+        // Handler of window requests.
+        event_loop.handle().insert_source(
+            event_loop_awakener_source,
+            move |_, _, winit_state| {
+                shim::handle_window_requests(winit_state);
+            },
+        )?;
+
+        let event_loop_handle = event_loop.handle();
+        let window_map = HashMap::new();
+        let event_sink = EventSink::new();
+        let window_updates = HashMap::new();
+
+        // Create event loop window target.
+        let event_loop_window_target = EventLoopWindowTarget {
+            display: display.clone(),
+            env,
+            state: RefCell::new(WinitState {
+                window_map,
+                event_sink,
+                window_updates,
+            }),
+            event_loop_handle,
+            output_manager,
+            event_loop_awakener,
+            wayland_source: wayland_source.clone(),
+            windowing_features,
+            theme_manager,
+            _marker: std::marker::PhantomData,
+        };
+
+        // Create event loop itself.
+        let event_loop = Self {
+            event_loop,
+            display,
+            pending_user_events,
+            wayland_source,
+            _seat_manager: seat_manager,
+            user_events_sender,
+            window_target: RootEventLoopWindowTarget {
+                p: crate::platform_impl::EventLoopWindowTarget::Wayland(event_loop_window_target),
+                _marker: std::marker::PhantomData,
+            },
+        };
+
+        Ok(event_loop)
+    }
+
+    pub fn run<F>(mut self, callback: F) -> !
+    where
+        F: FnMut(Event<'_, T>, &RootEventLoopWindowTarget<T>, &mut ControlFlow) + 'static,
+    {
+        self.run_return(callback);
+        process::exit(0)
+    }
+
+    pub fn run_return<F>(&mut self, mut callback: F)
+    where
+        F: FnMut(Event<'_, T>, &RootEventLoopWindowTarget<T>, &mut ControlFlow),
+    {
+        // Send pending events to the server.
+        let _ = self.display.flush();
+
+        let mut control_flow = ControlFlow::default();
+
+        let pending_user_events = self.pending_user_events.clone();
+
+        callback(
+            Event::NewEvents(StartCause::Init),
+            &self.window_target,
+            &mut control_flow,
+        );
+
+        let mut window_updates: Vec<(WindowId, WindowUpdate)> = Vec::new();
+        let mut event_sink_back_buffer = Vec::new();
+
+        // NOTE We break on errors from dispatches, since if we've got protocol error
+        // libwayland-client/wayland-rs will inform us anyway, but crashing downstream is not
+        // really an option. Instead we inform that the event loop got destroyed. We may
+        // communicate an error that something was terminated, but winit doesn't provide us
+        // with an API to do that via some event.
+        loop {
+            // Handle pending user events. We don't need back buffer, since we can't dispatch
+            // user events indirectly via callback to the user.
+            for user_event in pending_user_events.borrow_mut().drain(..) {
+                sticky_exit_callback(
+                    Event::UserEvent(user_event),
+                    &self.window_target,
+                    &mut control_flow,
+                    &mut callback,
+                );
+            }
+
+            // Process 'new' pending updates.
+            self.with_state(|state| {
+                window_updates.clear();
+                window_updates.extend(
+                    state
+                        .window_updates
+                        .iter_mut()
+                        .map(|(wid, window_update)| (*wid, window_update.take())),
+                );
+            });
+
+            for (window_id, window_update) in window_updates.iter_mut() {
+                if let Some(scale_factor) = window_update.scale_factor.map(|f| f as f64) {
+                    let mut physical_size = self.with_state(|state| {
+                        let window_handle = state.window_map.get(&window_id).unwrap();
+                        let mut size = window_handle.size.lock().unwrap();
+
+                        // Update the new logical size if it was changed.
+                        let window_size = window_update.size.unwrap_or(*size);
+                        *size = window_size;
+
+                        window_size.to_physical(scale_factor)
+                    });
+
+                    sticky_exit_callback(
+                        Event::WindowEvent {
+                            window_id: crate::window::WindowId(
+                                crate::platform_impl::WindowId::Wayland(*window_id),
+                            ),
+                            event: WindowEvent::ScaleFactorChanged {
+                                scale_factor,
+                                new_inner_size: &mut physical_size,
+                            },
+                        },
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
+
+                    // We don't update size on a window handle since we'll do that later
+                    // when handling size update.
+                    let new_logical_size = physical_size.to_logical(scale_factor);
+                    window_update.size = Some(new_logical_size);
+                }
+
+                if let Some(size) = window_update.size.take() {
+                    let physical_size = self.with_state(|state| {
+                        let window_handle = state.window_map.get_mut(&window_id).unwrap();
+                        let mut window_size = window_handle.size.lock().unwrap();
+
+                        // Always issue resize event on scale factor change.
+                        let physical_size =
+                            if window_update.scale_factor.is_none() && *window_size == size {
+                                // The size hasn't changed, don't inform downstream about that.
+                                None
+                            } else {
+                                *window_size = size;
+                                let scale_factor =
+                                    sctk::get_surface_scale_factor(&window_handle.window.surface());
+                                let physical_size = size.to_physical(scale_factor as f64);
+                                Some(physical_size)
+                            };
+
+                        // We still perform all of those resize related logic even if the size
+                        // hasn't changed, since GNOME relies on `set_geometry` calls after
+                        // configures.
+                        window_handle.window.resize(size.width, size.height);
+                        window_handle.window.refresh();
+
+                        // Mark that refresh isn't required, since we've done it right now.
+                        window_update.refresh_frame = false;
+
+                        physical_size
+                    });
+
+                    if let Some(physical_size) = physical_size {
+                        sticky_exit_callback(
+                            Event::WindowEvent {
+                                window_id: crate::window::WindowId(
+                                    crate::platform_impl::WindowId::Wayland(*window_id),
+                                ),
+                                event: WindowEvent::Resized(physical_size),
+                            },
+                            &self.window_target,
+                            &mut control_flow,
+                            &mut callback,
+                        );
+                    }
+                }
+
+                if window_update.close_window {
+                    sticky_exit_callback(
+                        Event::WindowEvent {
+                            window_id: crate::window::WindowId(
+                                crate::platform_impl::WindowId::Wayland(*window_id),
+                            ),
+                            event: WindowEvent::CloseRequested,
+                        },
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
+                }
+            }
+
+            // The purpose of the back buffer and that swap is to not hold borrow_mut when
+            // we're doing callback to the user, since we can double borrow if the user decides
+            // to create a window in one of those callbacks.
+            self.with_state(|state| {
+                std::mem::swap(
+                    &mut event_sink_back_buffer,
+                    &mut state.event_sink.window_events,
+                )
+            });
+
+            // Handle pending window events.
+            for event in event_sink_back_buffer.drain(..) {
+                let event = event.map_nonuser_event().unwrap();
+                sticky_exit_callback(event, &self.window_target, &mut control_flow, &mut callback);
+            }
+
+            // Send events cleared.
+            sticky_exit_callback(
+                Event::MainEventsCleared,
+                &self.window_target,
+                &mut control_flow,
+                &mut callback,
+            );
+
+            // Handle RedrawRequested events.
+            for (window_id, window_update) in window_updates.iter() {
+                // Handle refresh of the frame.
+                if window_update.refresh_frame {
+                    self.with_state(|state| {
+                        let window_handle = state.window_map.get_mut(&window_id).unwrap();
+                        window_handle.window.refresh();
+                        if !window_update.redraw_requested {
+                            window_handle.window.surface().commit();
+                        }
+                    });
+                }
+
+                // Handle redraw request.
+                if window_update.redraw_requested {
+                    sticky_exit_callback(
+                        Event::RedrawRequested(crate::window::WindowId(
+                            crate::platform_impl::WindowId::Wayland(*window_id),
+                        )),
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
+                }
+            }
+
+            // Send RedrawEventCleared.
+            sticky_exit_callback(
+                Event::RedrawEventsCleared,
+                &self.window_target,
+                &mut control_flow,
+                &mut callback,
+            );
+
+            // Send pending events to the server.
+            let _ = self.display.flush();
+
+            // During the run of the user callback, some other code monitoring and reading the
+            // Wayland socket may have been run (mesa for example does this with vsync), if that
+            // is the case, some events may have been enqueued in our event queue.
+            //
+            // If some messages are there, the event loop needs to behave as if it was instantly
+            // woken up by messages arriving from the Wayland socket, to avoid delaying the
+            // dispatch of these events until we're woken up again.
+            let instant_wakeup = {
+                let handle = self.event_loop.handle();
+                let source = self.wayland_source.clone();
+                let dispatched = handle.with_source(&source, |wayland_source| {
+                    let queue = wayland_source.queue();
+                    self.with_state(|state| {
+                        queue.dispatch_pending(state, |_, _, _| unimplemented!())
+                    })
+                });
+
+                if let Ok(dispatched) = dispatched {
+                    dispatched > 0
+                } else {
+                    break;
+                }
+            };
+
+            match control_flow {
+                ControlFlow::Exit => break,
+                ControlFlow::Poll => {
+                    // Non-blocking dispatch.
+                    let timeout = Duration::from_millis(0);
+                    if self.loop_dispatch(Some(timeout)).is_err() {
+                        break;
+                    }
+
+                    callback(
+                        Event::NewEvents(StartCause::Poll),
+                        &self.window_target,
+                        &mut control_flow,
+                    );
+                }
+                ControlFlow::Wait => {
+                    let timeout = if instant_wakeup {
+                        Some(Duration::from_millis(0))
+                    } else {
+                        None
+                    };
+
+                    if self.loop_dispatch(timeout).is_err() {
+                        break;
+                    }
+
+                    callback(
+                        Event::NewEvents(StartCause::WaitCancelled {
+                            start: Instant::now(),
+                            requested_resume: None,
+                        }),
+                        &self.window_target,
+                        &mut control_flow,
+                    );
+                }
+                ControlFlow::WaitUntil(deadline) => {
+                    let start = Instant::now();
+
+                    // Compute the amount of time we'll block for.
+                    let duration = if deadline > start && !instant_wakeup {
+                        deadline - start
+                    } else {
+                        Duration::from_millis(0)
+                    };
+
+                    if self.loop_dispatch(Some(duration)).is_err() {
+                        break;
+                    }
+
+                    let now = Instant::now();
+
+                    if now < deadline {
+                        callback(
+                            Event::NewEvents(StartCause::WaitCancelled {
+                                start,
+                                requested_resume: Some(deadline),
+                            }),
+                            &self.window_target,
+                            &mut control_flow,
+                        )
+                    } else {
+                        callback(
+                            Event::NewEvents(StartCause::ResumeTimeReached {
+                                start,
+                                requested_resume: deadline,
+                            }),
+                            &self.window_target,
+                            &mut control_flow,
+                        )
+                    }
+                }
+            }
+        }
+
+        callback(Event::LoopDestroyed, &self.window_target, &mut control_flow);
+    }
+
+    #[inline]
+    pub fn create_proxy(&self) -> EventLoopProxy<T> {
+        EventLoopProxy::new(self.user_events_sender.clone())
+    }
+
+    #[inline]
+    pub fn window_target(&self) -> &RootEventLoopWindowTarget<T> {
+        &self.window_target
+    }
+
+    fn with_state<U, F: FnOnce(&mut WinitState) -> U>(&mut self, f: F) -> U {
+        let state = match &mut self.window_target.p {
+            crate::platform_impl::EventLoopWindowTarget::Wayland(ref mut window_target) => {
+                window_target.state.get_mut()
+            }
+            #[cfg(feature = "x11")]
+            _ => unreachable!(),
+        };
+
+        f(state)
+    }
+
+    fn loop_dispatch<D: Into<Option<std::time::Duration>>>(
+        &mut self,
+        timeout: D,
+    ) -> std::io::Result<()> {
+        let mut state = match &mut self.window_target.p {
+            crate::platform_impl::EventLoopWindowTarget::Wayland(ref mut window_target) => {
+                window_target.state.get_mut()
+            }
+            #[cfg(feature = "x11")]
+            _ => unreachable!(),
+        };
+
+        self.event_loop.dispatch(timeout, &mut state)
+    }
+}

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

@@ -0,0 +1,32 @@
+//! An event loop proxy.
+
+use std::sync::mpsc::SendError;
+
+use sctk::reexports::calloop::channel::Sender;
+
+use crate::event_loop::EventLoopClosed;
+
+/// A handle that can be sent across the threads and used to wake up the `EventLoop`.
+pub struct EventLoopProxy<T: 'static> {
+    user_events_sender: Sender<T>,
+}
+
+impl<T: 'static> Clone for EventLoopProxy<T> {
+    fn clone(&self) -> Self {
+        EventLoopProxy {
+            user_events_sender: self.user_events_sender.clone(),
+        }
+    }
+}
+
+impl<T: 'static> EventLoopProxy<T> {
+    pub fn new(user_events_sender: Sender<T>) -> Self {
+        Self { user_events_sender }
+    }
+
+    pub fn send_event(&self, event: T) -> Result<(), EventLoopClosed<T>> {
+        self.user_events_sender
+            .send(event)
+            .map_err(|SendError(error)| EventLoopClosed(error))
+    }
+}

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

@@ -0,0 +1,36 @@
+//! An event loop's sink to deliver events from the Wayland event callbacks.
+
+use crate::event::{DeviceEvent, DeviceId as RootDeviceId, Event, WindowEvent};
+use crate::platform_impl::platform::{DeviceId as PlatformDeviceId, WindowId as PlatformWindowId};
+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.
+#[derive(Default)]
+pub struct EventSink {
+    pub window_events: Vec<Event<'static, ()>>,
+}
+
+impl EventSink {
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    /// Add new device event to a queue.
+    pub fn push_device_event(&mut self, event: DeviceEvent, device_id: DeviceId) {
+        self.window_events.push(Event::DeviceEvent {
+            event,
+            device_id: RootDeviceId(PlatformDeviceId::Wayland(device_id)),
+        });
+    }
+
+    /// Add new window event to a queue.
+    pub fn push_window_event(&mut self, event: WindowEvent<'static>, window_id: WindowId) {
+        self.window_events.push(Event::WindowEvent {
+            event,
+            window_id: RootWindowId(PlatformWindowId::Wayland(window_id)),
+        });
+    }
+}

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

@@ -0,0 +1,25 @@
+//! A state that we pass around in a dispatch.
+
+use std::collections::HashMap;
+
+use super::EventSink;
+use crate::platform_impl::wayland::window::shim::{WindowHandle, WindowUpdate};
+use crate::platform_impl::wayland::WindowId;
+
+/// Wrapper to carry winit's state.
+pub struct WinitState {
+    /// A sink for window and device events that is being filled during dispatching
+    /// event loop and forwarded downstream afterwards.
+    pub event_sink: EventSink,
+
+    /// Window updates, which are coming from SCTK or the compositor, which require
+    /// calling back to the winit's downstream. They are handled right in the event loop,
+    /// unlike the ones coming from buffers on the `WindowHandle`'s.
+    pub window_updates: HashMap<WindowId, WindowUpdate>,
+
+    /// Window map containing all SCTK windows. Since those windows aren't allowed
+    /// to be sent to other threads, they live on the event loop's thread
+    /// and requests from winit's windows are being forwarded to them either via
+    /// `WindowUpdate` or buffer on the associated with it `WindowHandle`.
+    pub window_map: HashMap<WindowId, WindowHandle>,
+}

src/platform_impl/linux/wayland/keyboard.rs

@@ -1,382 +0,0 @@
-use std::sync::{Arc, Mutex};
-
-use super::{event_loop::EventsSink, make_wid, DeviceId};
-use smithay_client_toolkit::{
-    keyboard::{
-        self, map_keyboard_auto_with_repeat, Event as KbEvent, KeyRepeatEvent, KeyRepeatKind,
-    },
-    reexports::client::protocol::{wl_keyboard, wl_seat},
-};
-
-use crate::event::{
-    DeviceEvent, ElementState, KeyboardInput, ModifiersState, VirtualKeyCode, WindowEvent,
-};
-
-pub fn init_keyboard(
-    seat: &wl_seat::WlSeat,
-    sink: EventsSink,
-    modifiers_tracker: Arc<Mutex<ModifiersState>>,
-) -> wl_keyboard::WlKeyboard {
-    // { variables to be captured by the closures
-    let target = Arc::new(Mutex::new(None));
-    let my_sink = sink.clone();
-    let repeat_sink = sink.clone();
-    let repeat_target = target.clone();
-    let my_modifiers = modifiers_tracker.clone();
-    // }
-    let ret = map_keyboard_auto_with_repeat(
-        seat,
-        KeyRepeatKind::System,
-        move |evt: KbEvent<'_>, _| {
-            match evt {
-                KbEvent::Enter { surface, .. } => {
-                    let wid = make_wid(&surface);
-                    my_sink.send_window_event(WindowEvent::Focused(true), wid);
-                    *target.lock().unwrap() = Some(wid);
-                }
-                KbEvent::Leave { surface, .. } => {
-                    let wid = make_wid(&surface);
-                    my_sink.send_window_event(WindowEvent::Focused(false), wid);
-                    *target.lock().unwrap() = None;
-                }
-                KbEvent::Key {
-                    rawkey,
-                    keysym,
-                    state,
-                    utf8,
-                    ..
-                } => {
-                    if let Some(wid) = *target.lock().unwrap() {
-                        let state = match state {
-                            wl_keyboard::KeyState::Pressed => ElementState::Pressed,
-                            wl_keyboard::KeyState::Released => ElementState::Released,
-                            _ => unreachable!(),
-                        };
-                        let vkcode = key_to_vkey(rawkey, keysym);
-                        my_sink.send_window_event(
-                            #[allow(deprecated)]
-                            WindowEvent::KeyboardInput {
-                                device_id: crate::event::DeviceId(
-                                    crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                ),
-                                input: KeyboardInput {
-                                    state,
-                                    scancode: rawkey,
-                                    virtual_keycode: vkcode,
-                                    modifiers: modifiers_tracker.lock().unwrap().clone(),
-                                },
-                                is_synthetic: false,
-                            },
-                            wid,
-                        );
-                        // send char event only on key press, not release
-                        if let ElementState::Released = state {
-                            return;
-                        }
-                        if let Some(txt) = utf8 {
-                            for chr in txt.chars() {
-                                my_sink.send_window_event(WindowEvent::ReceivedCharacter(chr), wid);
-                            }
-                        }
-                    }
-                }
-                KbEvent::RepeatInfo { .. } => { /* Handled by smithay client toolkit */ }
-                KbEvent::Modifiers {
-                    modifiers: event_modifiers,
-                } => {
-                    let modifiers = ModifiersState::from_wayland(event_modifiers);
-
-                    *modifiers_tracker.lock().unwrap() = modifiers;
-
-                    my_sink.send_device_event(DeviceEvent::ModifiersChanged(modifiers), DeviceId);
-                }
-            }
-        },
-        move |repeat_event: KeyRepeatEvent, _| {
-            if let Some(wid) = *repeat_target.lock().unwrap() {
-                let state = ElementState::Pressed;
-                let vkcode = key_to_vkey(repeat_event.rawkey, repeat_event.keysym);
-                repeat_sink.send_window_event(
-                    #[allow(deprecated)]
-                    WindowEvent::KeyboardInput {
-                        device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
-                            DeviceId,
-                        )),
-                        input: KeyboardInput {
-                            state,
-                            scancode: repeat_event.rawkey,
-                            virtual_keycode: vkcode,
-                            modifiers: my_modifiers.lock().unwrap().clone(),
-                        },
-                        is_synthetic: false,
-                    },
-                    wid,
-                );
-                if let Some(txt) = repeat_event.utf8 {
-                    for chr in txt.chars() {
-                        repeat_sink.send_window_event(WindowEvent::ReceivedCharacter(chr), wid);
-                    }
-                }
-            }
-        },
-    );
-
-    match ret {
-        Ok(keyboard) => keyboard,
-        Err(_) => {
-            // This is a fallback impl if libxkbcommon was not available
-            // This case should probably never happen, as most wayland
-            // compositors _need_ libxkbcommon anyway...
-            //
-            // In this case, we don't have the keymap information (it is
-            // supposed to be serialized by the compositor using libxkbcommon)
-
-            seat.get_keyboard(|keyboard| {
-                // { variables to be captured by the closure
-                let mut target = None;
-                let my_sink = sink;
-                // }
-
-                keyboard.implement_closure(
-                    move |evt, _| match evt {
-                        wl_keyboard::Event::Enter { surface, .. } => {
-                            let wid = make_wid(&surface);
-                            my_sink.send_window_event(WindowEvent::Focused(true), wid);
-                            target = Some(wid);
-                        }
-                        wl_keyboard::Event::Leave { surface, .. } => {
-                            let wid = make_wid(&surface);
-                            my_sink.send_window_event(WindowEvent::Focused(false), wid);
-                            target = None;
-                        }
-                        wl_keyboard::Event::Key { key, state, .. } => {
-                            if let Some(wid) = target {
-                                let state = match state {
-                                    wl_keyboard::KeyState::Pressed => ElementState::Pressed,
-                                    wl_keyboard::KeyState::Released => ElementState::Released,
-                                    _ => unreachable!(),
-                                };
-                                my_sink.send_window_event(
-                                    #[allow(deprecated)]
-                                    WindowEvent::KeyboardInput {
-                                        device_id: crate::event::DeviceId(
-                                            crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                        ),
-                                        input: KeyboardInput {
-                                            state,
-                                            scancode: key,
-                                            virtual_keycode: None,
-                                            modifiers: ModifiersState::default(),
-                                        },
-                                        is_synthetic: false,
-                                    },
-                                    wid,
-                                );
-                            }
-                        }
-                        _ => (),
-                    },
-                    (),
-                )
-            })
-            .unwrap()
-        }
-    }
-}
-
-fn key_to_vkey(rawkey: u32, keysym: u32) -> Option<VirtualKeyCode> {
-    match rawkey {
-        1 => Some(VirtualKeyCode::Escape),
-        2 => Some(VirtualKeyCode::Key1),
-        3 => Some(VirtualKeyCode::Key2),
-        4 => Some(VirtualKeyCode::Key3),
-        5 => Some(VirtualKeyCode::Key4),
-        6 => Some(VirtualKeyCode::Key5),
-        7 => Some(VirtualKeyCode::Key6),
-        8 => Some(VirtualKeyCode::Key7),
-        9 => Some(VirtualKeyCode::Key8),
-        10 => Some(VirtualKeyCode::Key9),
-        11 => Some(VirtualKeyCode::Key0),
-        _ => keysym_to_vkey(keysym),
-    }
-}
-
-fn keysym_to_vkey(keysym: u32) -> Option<VirtualKeyCode> {
-    use smithay_client_toolkit::keyboard::keysyms;
-    match keysym {
-        // letters
-        keysyms::XKB_KEY_A | keysyms::XKB_KEY_a => Some(VirtualKeyCode::A),
-        keysyms::XKB_KEY_B | keysyms::XKB_KEY_b => Some(VirtualKeyCode::B),
-        keysyms::XKB_KEY_C | keysyms::XKB_KEY_c => Some(VirtualKeyCode::C),
-        keysyms::XKB_KEY_D | keysyms::XKB_KEY_d => Some(VirtualKeyCode::D),
-        keysyms::XKB_KEY_E | keysyms::XKB_KEY_e => Some(VirtualKeyCode::E),
-        keysyms::XKB_KEY_F | keysyms::XKB_KEY_f => Some(VirtualKeyCode::F),
-        keysyms::XKB_KEY_G | keysyms::XKB_KEY_g => Some(VirtualKeyCode::G),
-        keysyms::XKB_KEY_H | keysyms::XKB_KEY_h => Some(VirtualKeyCode::H),
-        keysyms::XKB_KEY_I | keysyms::XKB_KEY_i => Some(VirtualKeyCode::I),
-        keysyms::XKB_KEY_J | keysyms::XKB_KEY_j => Some(VirtualKeyCode::J),
-        keysyms::XKB_KEY_K | keysyms::XKB_KEY_k => Some(VirtualKeyCode::K),
-        keysyms::XKB_KEY_L | keysyms::XKB_KEY_l => Some(VirtualKeyCode::L),
-        keysyms::XKB_KEY_M | keysyms::XKB_KEY_m => Some(VirtualKeyCode::M),
-        keysyms::XKB_KEY_N | keysyms::XKB_KEY_n => Some(VirtualKeyCode::N),
-        keysyms::XKB_KEY_O | keysyms::XKB_KEY_o => Some(VirtualKeyCode::O),
-        keysyms::XKB_KEY_P | keysyms::XKB_KEY_p => Some(VirtualKeyCode::P),
-        keysyms::XKB_KEY_Q | keysyms::XKB_KEY_q => Some(VirtualKeyCode::Q),
-        keysyms::XKB_KEY_R | keysyms::XKB_KEY_r => Some(VirtualKeyCode::R),
-        keysyms::XKB_KEY_S | keysyms::XKB_KEY_s => Some(VirtualKeyCode::S),
-        keysyms::XKB_KEY_T | keysyms::XKB_KEY_t => Some(VirtualKeyCode::T),
-        keysyms::XKB_KEY_U | keysyms::XKB_KEY_u => Some(VirtualKeyCode::U),
-        keysyms::XKB_KEY_V | keysyms::XKB_KEY_v => Some(VirtualKeyCode::V),
-        keysyms::XKB_KEY_W | keysyms::XKB_KEY_w => Some(VirtualKeyCode::W),
-        keysyms::XKB_KEY_X | keysyms::XKB_KEY_x => Some(VirtualKeyCode::X),
-        keysyms::XKB_KEY_Y | keysyms::XKB_KEY_y => Some(VirtualKeyCode::Y),
-        keysyms::XKB_KEY_Z | keysyms::XKB_KEY_z => Some(VirtualKeyCode::Z),
-        // F--
-        keysyms::XKB_KEY_F1 => Some(VirtualKeyCode::F1),
-        keysyms::XKB_KEY_F2 => Some(VirtualKeyCode::F2),
-        keysyms::XKB_KEY_F3 => Some(VirtualKeyCode::F3),
-        keysyms::XKB_KEY_F4 => Some(VirtualKeyCode::F4),
-        keysyms::XKB_KEY_F5 => Some(VirtualKeyCode::F5),
-        keysyms::XKB_KEY_F6 => Some(VirtualKeyCode::F6),
-        keysyms::XKB_KEY_F7 => Some(VirtualKeyCode::F7),
-        keysyms::XKB_KEY_F8 => Some(VirtualKeyCode::F8),
-        keysyms::XKB_KEY_F9 => Some(VirtualKeyCode::F9),
-        keysyms::XKB_KEY_F10 => Some(VirtualKeyCode::F10),
-        keysyms::XKB_KEY_F11 => Some(VirtualKeyCode::F11),
-        keysyms::XKB_KEY_F12 => Some(VirtualKeyCode::F12),
-        keysyms::XKB_KEY_F13 => Some(VirtualKeyCode::F13),
-        keysyms::XKB_KEY_F14 => Some(VirtualKeyCode::F14),
-        keysyms::XKB_KEY_F15 => Some(VirtualKeyCode::F15),
-        keysyms::XKB_KEY_F16 => Some(VirtualKeyCode::F16),
-        keysyms::XKB_KEY_F17 => Some(VirtualKeyCode::F17),
-        keysyms::XKB_KEY_F18 => Some(VirtualKeyCode::F18),
-        keysyms::XKB_KEY_F19 => Some(VirtualKeyCode::F19),
-        keysyms::XKB_KEY_F20 => Some(VirtualKeyCode::F20),
-        keysyms::XKB_KEY_F21 => Some(VirtualKeyCode::F21),
-        keysyms::XKB_KEY_F22 => Some(VirtualKeyCode::F22),
-        keysyms::XKB_KEY_F23 => Some(VirtualKeyCode::F23),
-        keysyms::XKB_KEY_F24 => Some(VirtualKeyCode::F24),
-        // flow control
-        keysyms::XKB_KEY_Print => Some(VirtualKeyCode::Snapshot),
-        keysyms::XKB_KEY_Scroll_Lock => Some(VirtualKeyCode::Scroll),
-        keysyms::XKB_KEY_Pause => Some(VirtualKeyCode::Pause),
-        keysyms::XKB_KEY_Insert => Some(VirtualKeyCode::Insert),
-        keysyms::XKB_KEY_Home => Some(VirtualKeyCode::Home),
-        keysyms::XKB_KEY_Delete => Some(VirtualKeyCode::Delete),
-        keysyms::XKB_KEY_End => Some(VirtualKeyCode::End),
-        keysyms::XKB_KEY_Page_Down => Some(VirtualKeyCode::PageDown),
-        keysyms::XKB_KEY_Page_Up => Some(VirtualKeyCode::PageUp),
-        // arrows
-        keysyms::XKB_KEY_Left => Some(VirtualKeyCode::Left),
-        keysyms::XKB_KEY_Up => Some(VirtualKeyCode::Up),
-        keysyms::XKB_KEY_Right => Some(VirtualKeyCode::Right),
-        keysyms::XKB_KEY_Down => Some(VirtualKeyCode::Down),
-        //
-        keysyms::XKB_KEY_BackSpace => Some(VirtualKeyCode::Back),
-        keysyms::XKB_KEY_Return => Some(VirtualKeyCode::Return),
-        keysyms::XKB_KEY_space => Some(VirtualKeyCode::Space),
-        // keypad
-        keysyms::XKB_KEY_Num_Lock => Some(VirtualKeyCode::Numlock),
-        keysyms::XKB_KEY_KP_0 => Some(VirtualKeyCode::Numpad0),
-        keysyms::XKB_KEY_KP_1 => Some(VirtualKeyCode::Numpad1),
-        keysyms::XKB_KEY_KP_2 => Some(VirtualKeyCode::Numpad2),
-        keysyms::XKB_KEY_KP_3 => Some(VirtualKeyCode::Numpad3),
-        keysyms::XKB_KEY_KP_4 => Some(VirtualKeyCode::Numpad4),
-        keysyms::XKB_KEY_KP_5 => Some(VirtualKeyCode::Numpad5),
-        keysyms::XKB_KEY_KP_6 => Some(VirtualKeyCode::Numpad6),
-        keysyms::XKB_KEY_KP_7 => Some(VirtualKeyCode::Numpad7),
-        keysyms::XKB_KEY_KP_8 => Some(VirtualKeyCode::Numpad8),
-        keysyms::XKB_KEY_KP_9 => Some(VirtualKeyCode::Numpad9),
-        // misc
-        // => Some(VirtualKeyCode::AbntC1),
-        // => Some(VirtualKeyCode::AbntC2),
-        keysyms::XKB_KEY_plus => Some(VirtualKeyCode::Add),
-        keysyms::XKB_KEY_apostrophe => Some(VirtualKeyCode::Apostrophe),
-        // => Some(VirtualKeyCode::Apps),
-        // => Some(VirtualKeyCode::At),
-        // => Some(VirtualKeyCode::Ax),
-        keysyms::XKB_KEY_backslash => Some(VirtualKeyCode::Backslash),
-        // => Some(VirtualKeyCode::Calculator),
-        // => Some(VirtualKeyCode::Capital),
-        keysyms::XKB_KEY_colon => Some(VirtualKeyCode::Colon),
-        keysyms::XKB_KEY_comma => Some(VirtualKeyCode::Comma),
-        // => Some(VirtualKeyCode::Convert),
-        // => Some(VirtualKeyCode::Decimal),
-        // => Some(VirtualKeyCode::Divide),
-        keysyms::XKB_KEY_equal => Some(VirtualKeyCode::Equals),
-        // => Some(VirtualKeyCode::Grave),
-        // => Some(VirtualKeyCode::Kana),
-        // => Some(VirtualKeyCode::Kanji),
-        keysyms::XKB_KEY_Alt_L => Some(VirtualKeyCode::LAlt),
-        // => Some(VirtualKeyCode::LBracket),
-        keysyms::XKB_KEY_Control_L => Some(VirtualKeyCode::LControl),
-        keysyms::XKB_KEY_Shift_L => Some(VirtualKeyCode::LShift),
-        // => Some(VirtualKeyCode::LWin),
-        // => Some(VirtualKeyCode::Mail),
-        // => Some(VirtualKeyCode::MediaSelect),
-        // => Some(VirtualKeyCode::MediaStop),
-        keysyms::XKB_KEY_minus => Some(VirtualKeyCode::Minus),
-        keysyms::XKB_KEY_asterisk => Some(VirtualKeyCode::Multiply),
-        // => Some(VirtualKeyCode::Mute),
-        // => Some(VirtualKeyCode::MyComputer),
-        // => Some(VirtualKeyCode::NextTrack),
-        // => Some(VirtualKeyCode::NoConvert),
-        keysyms::XKB_KEY_KP_Separator => Some(VirtualKeyCode::NumpadComma),
-        keysyms::XKB_KEY_KP_Enter => Some(VirtualKeyCode::NumpadEnter),
-        keysyms::XKB_KEY_KP_Equal => Some(VirtualKeyCode::NumpadEquals),
-        keysyms::XKB_KEY_KP_Add => Some(VirtualKeyCode::Add),
-        keysyms::XKB_KEY_KP_Subtract => Some(VirtualKeyCode::Subtract),
-        keysyms::XKB_KEY_KP_Divide => Some(VirtualKeyCode::Divide),
-        keysyms::XKB_KEY_KP_Page_Up => Some(VirtualKeyCode::PageUp),
-        keysyms::XKB_KEY_KP_Page_Down => Some(VirtualKeyCode::PageDown),
-        keysyms::XKB_KEY_KP_Home => Some(VirtualKeyCode::Home),
-        keysyms::XKB_KEY_KP_End => Some(VirtualKeyCode::End),
-        // => Some(VirtualKeyCode::OEM102),
-        // => Some(VirtualKeyCode::Period),
-        // => Some(VirtualKeyCode::Playpause),
-        // => Some(VirtualKeyCode::Power),
-        // => Some(VirtualKeyCode::Prevtrack),
-        keysyms::XKB_KEY_Alt_R => Some(VirtualKeyCode::RAlt),
-        // => Some(VirtualKeyCode::RBracket),
-        keysyms::XKB_KEY_Control_R => Some(VirtualKeyCode::RControl),
-        keysyms::XKB_KEY_Shift_R => Some(VirtualKeyCode::RShift),
-        // => Some(VirtualKeyCode::RWin),
-        keysyms::XKB_KEY_semicolon => Some(VirtualKeyCode::Semicolon),
-        keysyms::XKB_KEY_slash => Some(VirtualKeyCode::Slash),
-        // => Some(VirtualKeyCode::Sleep),
-        // => Some(VirtualKeyCode::Stop),
-        // => Some(VirtualKeyCode::Subtract),
-        // => Some(VirtualKeyCode::Sysrq),
-        keysyms::XKB_KEY_Tab => Some(VirtualKeyCode::Tab),
-        keysyms::XKB_KEY_ISO_Left_Tab => Some(VirtualKeyCode::Tab),
-        // => Some(VirtualKeyCode::Underline),
-        // => Some(VirtualKeyCode::Unlabeled),
-        keysyms::XKB_KEY_XF86AudioLowerVolume => Some(VirtualKeyCode::VolumeDown),
-        keysyms::XKB_KEY_XF86AudioRaiseVolume => Some(VirtualKeyCode::VolumeUp),
-        // => Some(VirtualKeyCode::Wake),
-        // => Some(VirtualKeyCode::Webback),
-        // => Some(VirtualKeyCode::WebFavorites),
-        // => Some(VirtualKeyCode::WebForward),
-        // => Some(VirtualKeyCode::WebHome),
-        // => Some(VirtualKeyCode::WebRefresh),
-        // => Some(VirtualKeyCode::WebSearch),
-        // => Some(VirtualKeyCode::WebStop),
-        // => Some(VirtualKeyCode::Yen),
-        keysyms::XKB_KEY_XF86Copy => Some(VirtualKeyCode::Copy),
-        keysyms::XKB_KEY_XF86Paste => Some(VirtualKeyCode::Paste),
-        keysyms::XKB_KEY_XF86Cut => Some(VirtualKeyCode::Cut),
-        // fallback
-        _ => None,
-    }
-}
-
-impl ModifiersState {
-    pub(crate) fn from_wayland(mods: keyboard::ModifiersState) -> ModifiersState {
-        let mut m = ModifiersState::empty();
-        m.set(ModifiersState::SHIFT, mods.shift);
-        m.set(ModifiersState::CTRL, mods.ctrl);
-        m.set(ModifiersState::ALT, mods.alt);
-        m.set(ModifiersState::LOGO, mods.logo);
-        m
-    }
-}

src/platform_impl/linux/wayland/mod.rs

@@ -1,17 +1,21 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd",
-           target_os = "netbsd", target_os = "openbsd"))]
+#![cfg(any(
+    target_os = "linux",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "netbsd",
+    target_os = "openbsd"
+))]
 
-pub use self::{
-    event_loop::{EventLoop, EventLoopProxy, EventLoopWindowTarget, MonitorHandle, VideoMode},
-    window::Window,
-};
+use sctk::reexports::client::protocol::wl_surface::WlSurface;
 
-use smithay_client_toolkit::reexports::client::protocol::wl_surface;
+pub use event_loop::{EventLoop, EventLoopProxy, EventLoopWindowTarget};
+pub use output::{MonitorHandle, VideoMode};
+pub use window::Window;
 
+mod env;
 mod event_loop;
-mod keyboard;
-mod pointer;
-mod touch;
+mod output;
+mod seat;
 mod window;
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -33,6 +37,6 @@ impl WindowId {
 }
 
 #[inline]
-fn make_wid(s: &wl_surface::WlSurface) -> WindowId {
-    WindowId(s.as_ref().c_ptr() as usize)
+fn make_wid(surface: &WlSurface) -> WindowId {
+    WindowId(surface.as_ref().c_ptr() as usize)
 }

src/platform_impl/linux/wayland/output.rs

@@ -0,0 +1,240 @@
+use std::collections::VecDeque;
+use std::sync::{Arc, Mutex};
+
+use sctk::reexports::client::protocol::wl_output::WlOutput;
+use sctk::reexports::client::Display;
+
+use sctk::environment::Environment;
+use sctk::output::OutputStatusListener;
+
+use crate::dpi::{PhysicalPosition, PhysicalSize};
+use crate::monitor::{MonitorHandle as RootMonitorHandle, VideoMode as RootVideoMode};
+use crate::platform_impl::platform::{
+    MonitorHandle as PlatformMonitorHandle, VideoMode as PlatformVideoMode,
+};
+
+use super::env::WinitEnv;
+use super::event_loop::EventLoopWindowTarget;
+
+/// Output manager.
+pub struct OutputManager {
+    /// A handle that actually performs all operations on outputs.
+    handle: OutputManagerHandle,
+
+    _output_listener: OutputStatusListener,
+}
+
+impl OutputManager {
+    pub fn new(env: &Environment<WinitEnv>) -> Self {
+        let handle = OutputManagerHandle::new();
+
+        // Handle existing outputs.
+        for output in env.get_all_outputs() {
+            match sctk::output::with_output_info(&output, |info| info.obsolete) {
+                Some(false) => (),
+                // The output is obsolete or we've failed to access its data, skipping.
+                _ => continue,
+            }
+
+            // The output is present and unusable, add it to the output manager manager.
+            handle.add_output(output);
+        }
+
+        let handle_for_listener = handle.clone();
+
+        let output_listener = env.listen_for_outputs(move |output, info, _| {
+            if info.obsolete {
+                handle_for_listener.remove_output(output)
+            } else {
+                handle_for_listener.add_output(output)
+            }
+        });
+
+        Self {
+            handle,
+            _output_listener: output_listener,
+        }
+    }
+
+    pub fn handle(&self) -> OutputManagerHandle {
+        self.handle.clone()
+    }
+}
+
+/// A handle to output manager.
+#[derive(Debug, Clone)]
+pub struct OutputManagerHandle {
+    outputs: Arc<Mutex<VecDeque<MonitorHandle>>>,
+}
+
+impl OutputManagerHandle {
+    fn new() -> Self {
+        let outputs = Arc::new(Mutex::new(VecDeque::new()));
+        Self { outputs }
+    }
+
+    /// Handle addition of the output.
+    fn add_output(&self, output: WlOutput) {
+        let mut outputs = self.outputs.lock().unwrap();
+        let position = outputs.iter().position(|handle| handle.proxy == output);
+        if position.is_none() {
+            outputs.push_back(MonitorHandle::new(output));
+        }
+    }
+
+    /// Handle removal of the output.
+    fn remove_output(&self, output: WlOutput) {
+        let mut outputs = self.outputs.lock().unwrap();
+        let position = outputs.iter().position(|handle| handle.proxy == output);
+        if let Some(position) = position {
+            outputs.remove(position);
+        }
+    }
+
+    /// Get all observed outputs.
+    pub fn available_outputs(&self) -> VecDeque<MonitorHandle> {
+        self.outputs.lock().unwrap().clone()
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct MonitorHandle {
+    pub(crate) proxy: WlOutput,
+}
+
+impl PartialEq for MonitorHandle {
+    fn eq(&self, other: &Self) -> bool {
+        self.native_identifier() == other.native_identifier()
+    }
+}
+
+impl Eq for MonitorHandle {}
+
+impl PartialOrd for MonitorHandle {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        Some(self.cmp(&other))
+    }
+}
+
+impl Ord for MonitorHandle {
+    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+        self.native_identifier().cmp(&other.native_identifier())
+    }
+}
+
+impl std::hash::Hash for MonitorHandle {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        self.native_identifier().hash(state);
+    }
+}
+
+impl MonitorHandle {
+    #[inline]
+    pub(crate) fn new(proxy: WlOutput) -> Self {
+        Self { proxy }
+    }
+
+    #[inline]
+    pub fn name(&self) -> Option<String> {
+        sctk::output::with_output_info(&self.proxy, |info| {
+            format!("{} ({})", info.model, info.make)
+        })
+    }
+
+    #[inline]
+    pub fn native_identifier(&self) -> u32 {
+        sctk::output::with_output_info(&self.proxy, |info| info.id).unwrap_or(0)
+    }
+
+    #[inline]
+    pub fn size(&self) -> PhysicalSize<u32> {
+        match sctk::output::with_output_info(&self.proxy, |info| {
+            info.modes
+                .iter()
+                .find(|mode| mode.is_current)
+                .map(|mode| mode.dimensions)
+        }) {
+            Some(Some((w, h))) => (w as u32, h as u32),
+            _ => (0, 0),
+        }
+        .into()
+    }
+
+    #[inline]
+    pub fn position(&self) -> PhysicalPosition<i32> {
+        sctk::output::with_output_info(&self.proxy, |info| info.location)
+            .unwrap_or((0, 0))
+            .into()
+    }
+
+    #[inline]
+    pub fn scale_factor(&self) -> i32 {
+        sctk::output::with_output_info(&self.proxy, |info| info.scale_factor).unwrap_or(1)
+    }
+
+    #[inline]
+    pub fn video_modes(&self) -> impl Iterator<Item = RootVideoMode> {
+        let modes = sctk::output::with_output_info(&self.proxy, |info| info.modes.clone())
+            .unwrap_or_else(Vec::new);
+
+        let monitor = self.clone();
+
+        modes.into_iter().map(move |mode| RootVideoMode {
+            video_mode: PlatformVideoMode::Wayland(VideoMode {
+                size: (mode.dimensions.0 as u32, mode.dimensions.1 as u32).into(),
+                refresh_rate: (mode.refresh_rate as f32 / 1000.0).round() as u16,
+                bit_depth: 32,
+                monitor: monitor.clone(),
+            }),
+        })
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct VideoMode {
+    pub(crate) size: PhysicalSize<u32>,
+    pub(crate) bit_depth: u16,
+    pub(crate) refresh_rate: u16,
+    pub(crate) monitor: MonitorHandle,
+}
+
+impl VideoMode {
+    #[inline]
+    pub fn size(&self) -> PhysicalSize<u32> {
+        self.size
+    }
+
+    #[inline]
+    pub fn bit_depth(&self) -> u16 {
+        self.bit_depth
+    }
+
+    #[inline]
+    pub fn refresh_rate(&self) -> u16 {
+        self.refresh_rate
+    }
+
+    pub fn monitor(&self) -> RootMonitorHandle {
+        RootMonitorHandle {
+            inner: PlatformMonitorHandle::Wayland(self.monitor.clone()),
+        }
+    }
+}
+
+impl<T> EventLoopWindowTarget<T> {
+    #[inline]
+    pub fn display(&self) -> &Display {
+        &self.display
+    }
+
+    #[inline]
+    pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
+        self.output_manager.handle.available_outputs()
+    }
+
+    #[inline]
+    pub fn primary_monitor(&self) -> Option<RootMonitorHandle> {
+        // There's no primary monitor on Wayland.
+        None
+    }
+}

src/platform_impl/linux/wayland/pointer.rs

@@ -1,282 +0,0 @@
-use std::sync::{Arc, Mutex};
-
-use crate::event::{
-    DeviceEvent, ElementState, ModifiersState, MouseButton, MouseScrollDelta, TouchPhase,
-    WindowEvent,
-};
-
-use super::{
-    event_loop::{CursorManager, EventsSink},
-    make_wid,
-    window::WindowStore,
-    DeviceId,
-};
-
-use smithay_client_toolkit::surface;
-
-use smithay_client_toolkit::reexports::client::protocol::{
-    wl_pointer::{self, Event as PtrEvent, WlPointer},
-    wl_seat,
-};
-
-use smithay_client_toolkit::reexports::protocols::unstable::relative_pointer::v1::client::{
-    zwp_relative_pointer_manager_v1::ZwpRelativePointerManagerV1, zwp_relative_pointer_v1::Event,
-    zwp_relative_pointer_v1::ZwpRelativePointerV1,
-};
-
-use smithay_client_toolkit::reexports::protocols::unstable::pointer_constraints::v1::client::{
-    zwp_locked_pointer_v1::ZwpLockedPointerV1, zwp_pointer_constraints_v1::Lifetime,
-    zwp_pointer_constraints_v1::ZwpPointerConstraintsV1,
-};
-
-use smithay_client_toolkit::reexports::client::protocol::wl_surface::WlSurface;
-
-pub fn implement_pointer(
-    seat: &wl_seat::WlSeat,
-    sink: EventsSink,
-    store: Arc<Mutex<WindowStore>>,
-    modifiers_tracker: Arc<Mutex<ModifiersState>>,
-    cursor_manager: Arc<Mutex<CursorManager>>,
-) -> WlPointer {
-    seat.get_pointer(|pointer| {
-        // Currently focused winit surface
-        let mut mouse_focus = None;
-        let mut axis_buffer = None;
-        let mut axis_discrete_buffer = None;
-        let mut axis_state = TouchPhase::Ended;
-
-        pointer.implement_closure(
-            move |evt, pointer| {
-                let store = store.lock().unwrap();
-                let mut cursor_manager = cursor_manager.lock().unwrap();
-                match evt {
-                    PtrEvent::Enter {
-                        surface,
-                        surface_x,
-                        surface_y,
-                        ..
-                    } => {
-                        let wid = store.find_wid(&surface);
-
-                        if let Some(wid) = wid {
-                            let scale_factor = surface::get_dpi_factor(&surface) as f64;
-                            mouse_focus = Some(surface);
-
-                            // Reload cursor style only when we enter winit's surface. Calling
-                            // this function every time on `PtrEvent::Enter` could interfere with
-                            // SCTK CSD handling, since it changes cursor icons when you hover
-                            // cursor over the window borders.
-                            cursor_manager.reload_cursor_style();
-
-                            sink.send_window_event(
-                                WindowEvent::CursorEntered {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                },
-                                wid,
-                            );
-                            sink.send_window_event(
-                                WindowEvent::CursorMoved {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                    position: (surface_x * scale_factor, surface_y * scale_factor)
-                                        .into(),
-                                    modifiers: modifiers_tracker.lock().unwrap().clone(),
-                                },
-                                wid,
-                            );
-                        }
-                    }
-                    PtrEvent::Leave { surface, .. } => {
-                        mouse_focus = None;
-                        let wid = store.find_wid(&surface);
-                        if let Some(wid) = wid {
-                            sink.send_window_event(
-                                WindowEvent::CursorLeft {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                },
-                                wid,
-                            );
-                        }
-                    }
-                    PtrEvent::Motion {
-                        surface_x,
-                        surface_y,
-                        ..
-                    } => {
-                        if let Some(surface) = mouse_focus.as_ref() {
-                            let scale_factor = surface::get_dpi_factor(&surface) as f64;
-                            let wid = make_wid(surface);
-                            sink.send_window_event(
-                                WindowEvent::CursorMoved {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                    position: (surface_x * scale_factor, surface_y * scale_factor)
-                                        .into(),
-                                    modifiers: modifiers_tracker.lock().unwrap().clone(),
-                                },
-                                wid,
-                            );
-                        }
-                    }
-                    PtrEvent::Button { button, state, .. } => {
-                        if let Some(surface) = mouse_focus.as_ref() {
-                            let state = match state {
-                                wl_pointer::ButtonState::Pressed => ElementState::Pressed,
-                                wl_pointer::ButtonState::Released => ElementState::Released,
-                                _ => unreachable!(),
-                            };
-                            let button = match button {
-                                0x110 => MouseButton::Left,
-                                0x111 => MouseButton::Right,
-                                0x112 => MouseButton::Middle,
-                                // TODO figure out the translation ?
-                                _ => return,
-                            };
-                            sink.send_window_event(
-                                WindowEvent::MouseInput {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                    state,
-                                    button,
-                                    modifiers: modifiers_tracker.lock().unwrap().clone(),
-                                },
-                                make_wid(surface),
-                            );
-                        }
-                    }
-                    PtrEvent::Axis { axis, value, .. } => {
-                        if let Some(surface) = mouse_focus.as_ref() {
-                            let wid = make_wid(surface);
-                            if pointer.as_ref().version() < 5 {
-                                let (mut x, mut y) = (0.0, 0.0);
-                                // old seat compatibility
-                                match axis {
-                                    // wayland vertical sign convention is the inverse of winit
-                                    wl_pointer::Axis::VerticalScroll => y -= value as f32,
-                                    wl_pointer::Axis::HorizontalScroll => x += value as f32,
-                                    _ => unreachable!(),
-                                }
-                                sink.send_window_event(
-                                    WindowEvent::MouseWheel {
-                                        device_id: crate::event::DeviceId(
-                                            crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                        ),
-                                        delta: MouseScrollDelta::PixelDelta(
-                                            (x as f64, y as f64).into(),
-                                        ),
-                                        phase: TouchPhase::Moved,
-                                        modifiers: modifiers_tracker.lock().unwrap().clone(),
-                                    },
-                                    wid,
-                                );
-                            } else {
-                                let (mut x, mut y) = axis_buffer.unwrap_or((0.0, 0.0));
-                                match axis {
-                                    // wayland vertical sign convention is the inverse of winit
-                                    wl_pointer::Axis::VerticalScroll => y -= value as f32,
-                                    wl_pointer::Axis::HorizontalScroll => x += value as f32,
-                                    _ => unreachable!(),
-                                }
-                                axis_buffer = Some((x, y));
-                                axis_state = match axis_state {
-                                    TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
-                                    _ => TouchPhase::Started,
-                                }
-                            }
-                        }
-                    }
-                    PtrEvent::Frame => {
-                        let axis_buffer = axis_buffer.take();
-                        let axis_discrete_buffer = axis_discrete_buffer.take();
-                        if let Some(surface) = mouse_focus.as_ref() {
-                            let wid = make_wid(surface);
-                            if let Some((x, y)) = axis_discrete_buffer {
-                                sink.send_window_event(
-                                    WindowEvent::MouseWheel {
-                                        device_id: crate::event::DeviceId(
-                                            crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                        ),
-                                        delta: MouseScrollDelta::LineDelta(x as f32, y as f32),
-                                        phase: axis_state,
-                                        modifiers: modifiers_tracker.lock().unwrap().clone(),
-                                    },
-                                    wid,
-                                );
-                            } else if let Some((x, y)) = axis_buffer {
-                                sink.send_window_event(
-                                    WindowEvent::MouseWheel {
-                                        device_id: crate::event::DeviceId(
-                                            crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                        ),
-                                        delta: MouseScrollDelta::PixelDelta(
-                                            (x as f64, y as f64).into(),
-                                        ),
-                                        phase: axis_state,
-                                        modifiers: modifiers_tracker.lock().unwrap().clone(),
-                                    },
-                                    wid,
-                                );
-                            }
-                        }
-                    }
-                    PtrEvent::AxisSource { .. } => (),
-                    PtrEvent::AxisStop { .. } => {
-                        axis_state = TouchPhase::Ended;
-                    }
-                    PtrEvent::AxisDiscrete { axis, discrete } => {
-                        let (mut x, mut y) = axis_discrete_buffer.unwrap_or((0, 0));
-                        match axis {
-                            // wayland vertical sign convention is the inverse of winit
-                            wl_pointer::Axis::VerticalScroll => y -= discrete,
-                            wl_pointer::Axis::HorizontalScroll => x += discrete,
-                            _ => unreachable!(),
-                        }
-                        axis_discrete_buffer = Some((x, y));
-                        axis_state = match axis_state {
-                            TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
-                            _ => TouchPhase::Started,
-                        }
-                    }
-                    _ => unreachable!(),
-                }
-            },
-            (),
-        )
-    })
-    .unwrap()
-}
-
-pub fn implement_relative_pointer(
-    sink: EventsSink,
-    pointer: &WlPointer,
-    manager: &ZwpRelativePointerManagerV1,
-) -> Result<ZwpRelativePointerV1, ()> {
-    manager.get_relative_pointer(pointer, |rel_pointer| {
-        rel_pointer.implement_closure(
-            move |evt, _rel_pointer| match evt {
-                Event::RelativeMotion { dx, dy, .. } => {
-                    sink.send_device_event(DeviceEvent::MouseMotion { delta: (dx, dy) }, DeviceId)
-                }
-                _ => unreachable!(),
-            },
-            (),
-        )
-    })
-}
-
-pub fn implement_locked_pointer(
-    surface: &WlSurface,
-    pointer: &WlPointer,
-    constraints: &ZwpPointerConstraintsV1,
-) -> Result<ZwpLockedPointerV1, ()> {
-    constraints.lock_pointer(surface, pointer, None, Lifetime::Persistent.to_raw(), |c| {
-        c.implement_closure(|_, _| (), ())
-    })
-}

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

@@ -0,0 +1,151 @@
+//! Handling of various keyboard events.
+
+use sctk::reexports::client::protocol::wl_keyboard::KeyState;
+
+use sctk::seat::keyboard::Event as KeyboardEvent;
+
+use crate::event::{ElementState, KeyboardInput, ModifiersState, WindowEvent};
+use crate::platform_impl::wayland::event_loop::WinitState;
+use crate::platform_impl::wayland::{self, DeviceId};
+
+use super::keymap;
+use super::KeyboardInner;
+
+#[inline]
+pub(super) fn handle_keyboard(
+    event: KeyboardEvent<'_>,
+    inner: &mut KeyboardInner,
+    winit_state: &mut WinitState,
+) {
+    let event_sink = &mut winit_state.event_sink;
+    match event {
+        KeyboardEvent::Enter { surface, .. } => {
+            let window_id = wayland::make_wid(&surface);
+
+            // Window gained focus.
+            event_sink.push_window_event(WindowEvent::Focused(true), window_id);
+
+            // Dispatch modifers changes that we've received before getting `Enter` event.
+            if let Some(modifiers) = inner.pending_modifers_state.take() {
+                *inner.modifiers_state.borrow_mut() = modifiers;
+                event_sink.push_window_event(WindowEvent::ModifiersChanged(modifiers), window_id);
+            }
+
+            inner.target_window_id = Some(window_id);
+        }
+        KeyboardEvent::Leave { surface, .. } => {
+            let window_id = wayland::make_wid(&surface);
+
+            // Notify that no modifiers are being pressed.
+            if !inner.modifiers_state.borrow().is_empty() {
+                event_sink.push_window_event(
+                    WindowEvent::ModifiersChanged(ModifiersState::empty()),
+                    window_id,
+                );
+            }
+
+            // Window lost focus.
+            event_sink.push_window_event(WindowEvent::Focused(false), window_id);
+
+            // Reset the id.
+            inner.target_window_id = None;
+        }
+        KeyboardEvent::Key {
+            rawkey,
+            keysym,
+            state,
+            utf8,
+            ..
+        } => {
+            let window_id = match inner.target_window_id {
+                Some(window_id) => window_id,
+                None => return,
+            };
+
+            let state = match state {
+                KeyState::Pressed => ElementState::Pressed,
+                KeyState::Released => ElementState::Released,
+                _ => unreachable!(),
+            };
+
+            let virtual_keycode = keymap::keysym_to_vkey(keysym);
+
+            event_sink.push_window_event(
+                #[allow(deprecated)]
+                WindowEvent::KeyboardInput {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    input: KeyboardInput {
+                        state,
+                        scancode: rawkey,
+                        virtual_keycode,
+                        modifiers: *inner.modifiers_state.borrow(),
+                    },
+                    is_synthetic: false,
+                },
+                window_id,
+            );
+
+            // Send ReceivedCharacter event only on ElementState::Pressed.
+            if ElementState::Released == state {
+                return;
+            }
+
+            if let Some(txt) = utf8 {
+                for ch in txt.chars() {
+                    event_sink.push_window_event(WindowEvent::ReceivedCharacter(ch), window_id);
+                }
+            }
+        }
+        KeyboardEvent::Repeat {
+            rawkey,
+            keysym,
+            utf8,
+            ..
+        } => {
+            let window_id = match inner.target_window_id {
+                Some(window_id) => window_id,
+                None => return,
+            };
+
+            let virtual_keycode = keymap::keysym_to_vkey(keysym);
+
+            event_sink.push_window_event(
+                #[allow(deprecated)]
+                WindowEvent::KeyboardInput {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    input: KeyboardInput {
+                        state: ElementState::Pressed,
+                        scancode: rawkey,
+                        virtual_keycode,
+                        modifiers: *inner.modifiers_state.borrow(),
+                    },
+                    is_synthetic: false,
+                },
+                window_id,
+            );
+
+            if let Some(txt) = utf8 {
+                for ch in txt.chars() {
+                    event_sink.push_window_event(WindowEvent::ReceivedCharacter(ch), window_id);
+                }
+            }
+        }
+        KeyboardEvent::Modifiers { modifiers } => {
+            let modifiers = ModifiersState::from(modifiers);
+            if let Some(window_id) = inner.target_window_id {
+                *inner.modifiers_state.borrow_mut() = modifiers;
+
+                event_sink.push_window_event(WindowEvent::ModifiersChanged(modifiers), window_id);
+            } else {
+                // Compositor must send modifiers after wl_keyboard::enter, however certain
+                // compositors are still sending it before, so stash such events and send
+                // them on wl_keyboard::enter.
+                inner.pending_modifers_state = Some(modifiers);
+            }
+        }
+    }
+}

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

@@ -0,0 +1,192 @@
+//! Convert Wayland keys to winit keys.
+
+use crate::event::VirtualKeyCode;
+
+pub fn keysym_to_vkey(keysym: u32) -> Option<VirtualKeyCode> {
+    use sctk::seat::keyboard::keysyms;
+    match keysym {
+        // Numbers.
+        keysyms::XKB_KEY_1 => Some(VirtualKeyCode::Key1),
+        keysyms::XKB_KEY_2 => Some(VirtualKeyCode::Key2),
+        keysyms::XKB_KEY_3 => Some(VirtualKeyCode::Key3),
+        keysyms::XKB_KEY_4 => Some(VirtualKeyCode::Key4),
+        keysyms::XKB_KEY_5 => Some(VirtualKeyCode::Key5),
+        keysyms::XKB_KEY_6 => Some(VirtualKeyCode::Key6),
+        keysyms::XKB_KEY_7 => Some(VirtualKeyCode::Key7),
+        keysyms::XKB_KEY_8 => Some(VirtualKeyCode::Key8),
+        keysyms::XKB_KEY_9 => Some(VirtualKeyCode::Key9),
+        keysyms::XKB_KEY_0 => Some(VirtualKeyCode::Key0),
+        // Letters.
+        keysyms::XKB_KEY_A | keysyms::XKB_KEY_a => Some(VirtualKeyCode::A),
+        keysyms::XKB_KEY_B | keysyms::XKB_KEY_b => Some(VirtualKeyCode::B),
+        keysyms::XKB_KEY_C | keysyms::XKB_KEY_c => Some(VirtualKeyCode::C),
+        keysyms::XKB_KEY_D | keysyms::XKB_KEY_d => Some(VirtualKeyCode::D),
+        keysyms::XKB_KEY_E | keysyms::XKB_KEY_e => Some(VirtualKeyCode::E),
+        keysyms::XKB_KEY_F | keysyms::XKB_KEY_f => Some(VirtualKeyCode::F),
+        keysyms::XKB_KEY_G | keysyms::XKB_KEY_g => Some(VirtualKeyCode::G),
+        keysyms::XKB_KEY_H | keysyms::XKB_KEY_h => Some(VirtualKeyCode::H),
+        keysyms::XKB_KEY_I | keysyms::XKB_KEY_i => Some(VirtualKeyCode::I),
+        keysyms::XKB_KEY_J | keysyms::XKB_KEY_j => Some(VirtualKeyCode::J),
+        keysyms::XKB_KEY_K | keysyms::XKB_KEY_k => Some(VirtualKeyCode::K),
+        keysyms::XKB_KEY_L | keysyms::XKB_KEY_l => Some(VirtualKeyCode::L),
+        keysyms::XKB_KEY_M | keysyms::XKB_KEY_m => Some(VirtualKeyCode::M),
+        keysyms::XKB_KEY_N | keysyms::XKB_KEY_n => Some(VirtualKeyCode::N),
+        keysyms::XKB_KEY_O | keysyms::XKB_KEY_o => Some(VirtualKeyCode::O),
+        keysyms::XKB_KEY_P | keysyms::XKB_KEY_p => Some(VirtualKeyCode::P),
+        keysyms::XKB_KEY_Q | keysyms::XKB_KEY_q => Some(VirtualKeyCode::Q),
+        keysyms::XKB_KEY_R | keysyms::XKB_KEY_r => Some(VirtualKeyCode::R),
+        keysyms::XKB_KEY_S | keysyms::XKB_KEY_s => Some(VirtualKeyCode::S),
+        keysyms::XKB_KEY_T | keysyms::XKB_KEY_t => Some(VirtualKeyCode::T),
+        keysyms::XKB_KEY_U | keysyms::XKB_KEY_u => Some(VirtualKeyCode::U),
+        keysyms::XKB_KEY_V | keysyms::XKB_KEY_v => Some(VirtualKeyCode::V),
+        keysyms::XKB_KEY_W | keysyms::XKB_KEY_w => Some(VirtualKeyCode::W),
+        keysyms::XKB_KEY_X | keysyms::XKB_KEY_x => Some(VirtualKeyCode::X),
+        keysyms::XKB_KEY_Y | keysyms::XKB_KEY_y => Some(VirtualKeyCode::Y),
+        keysyms::XKB_KEY_Z | keysyms::XKB_KEY_z => Some(VirtualKeyCode::Z),
+        // Escape.
+        keysyms::XKB_KEY_Escape => Some(VirtualKeyCode::Escape),
+        // Function keys.
+        keysyms::XKB_KEY_F1 => Some(VirtualKeyCode::F1),
+        keysyms::XKB_KEY_F2 => Some(VirtualKeyCode::F2),
+        keysyms::XKB_KEY_F3 => Some(VirtualKeyCode::F3),
+        keysyms::XKB_KEY_F4 => Some(VirtualKeyCode::F4),
+        keysyms::XKB_KEY_F5 => Some(VirtualKeyCode::F5),
+        keysyms::XKB_KEY_F6 => Some(VirtualKeyCode::F6),
+        keysyms::XKB_KEY_F7 => Some(VirtualKeyCode::F7),
+        keysyms::XKB_KEY_F8 => Some(VirtualKeyCode::F8),
+        keysyms::XKB_KEY_F9 => Some(VirtualKeyCode::F9),
+        keysyms::XKB_KEY_F10 => Some(VirtualKeyCode::F10),
+        keysyms::XKB_KEY_F11 => Some(VirtualKeyCode::F11),
+        keysyms::XKB_KEY_F12 => Some(VirtualKeyCode::F12),
+        keysyms::XKB_KEY_F13 => Some(VirtualKeyCode::F13),
+        keysyms::XKB_KEY_F14 => Some(VirtualKeyCode::F14),
+        keysyms::XKB_KEY_F15 => Some(VirtualKeyCode::F15),
+        keysyms::XKB_KEY_F16 => Some(VirtualKeyCode::F16),
+        keysyms::XKB_KEY_F17 => Some(VirtualKeyCode::F17),
+        keysyms::XKB_KEY_F18 => Some(VirtualKeyCode::F18),
+        keysyms::XKB_KEY_F19 => Some(VirtualKeyCode::F19),
+        keysyms::XKB_KEY_F20 => Some(VirtualKeyCode::F20),
+        keysyms::XKB_KEY_F21 => Some(VirtualKeyCode::F21),
+        keysyms::XKB_KEY_F22 => Some(VirtualKeyCode::F22),
+        keysyms::XKB_KEY_F23 => Some(VirtualKeyCode::F23),
+        keysyms::XKB_KEY_F24 => Some(VirtualKeyCode::F24),
+        // Flow control.
+        keysyms::XKB_KEY_Print => Some(VirtualKeyCode::Snapshot),
+        keysyms::XKB_KEY_Scroll_Lock => Some(VirtualKeyCode::Scroll),
+        keysyms::XKB_KEY_Pause => Some(VirtualKeyCode::Pause),
+        keysyms::XKB_KEY_Insert => Some(VirtualKeyCode::Insert),
+        keysyms::XKB_KEY_Home => Some(VirtualKeyCode::Home),
+        keysyms::XKB_KEY_Delete => Some(VirtualKeyCode::Delete),
+        keysyms::XKB_KEY_End => Some(VirtualKeyCode::End),
+        keysyms::XKB_KEY_Page_Down => Some(VirtualKeyCode::PageDown),
+        keysyms::XKB_KEY_Page_Up => Some(VirtualKeyCode::PageUp),
+        // Arrows.
+        keysyms::XKB_KEY_Left => Some(VirtualKeyCode::Left),
+        keysyms::XKB_KEY_Up => Some(VirtualKeyCode::Up),
+        keysyms::XKB_KEY_Right => Some(VirtualKeyCode::Right),
+        keysyms::XKB_KEY_Down => Some(VirtualKeyCode::Down),
+
+        keysyms::XKB_KEY_BackSpace => Some(VirtualKeyCode::Back),
+        keysyms::XKB_KEY_Return => Some(VirtualKeyCode::Return),
+        keysyms::XKB_KEY_space => Some(VirtualKeyCode::Space),
+
+        keysyms::XKB_KEY_Multi_key => Some(VirtualKeyCode::Compose),
+        keysyms::XKB_KEY_caret => Some(VirtualKeyCode::Caret),
+
+        // Keypad.
+        keysyms::XKB_KEY_Num_Lock => Some(VirtualKeyCode::Numlock),
+        keysyms::XKB_KEY_KP_0 => Some(VirtualKeyCode::Numpad0),
+        keysyms::XKB_KEY_KP_1 => Some(VirtualKeyCode::Numpad1),
+        keysyms::XKB_KEY_KP_2 => Some(VirtualKeyCode::Numpad2),
+        keysyms::XKB_KEY_KP_3 => Some(VirtualKeyCode::Numpad3),
+        keysyms::XKB_KEY_KP_4 => Some(VirtualKeyCode::Numpad4),
+        keysyms::XKB_KEY_KP_5 => Some(VirtualKeyCode::Numpad5),
+        keysyms::XKB_KEY_KP_6 => Some(VirtualKeyCode::Numpad6),
+        keysyms::XKB_KEY_KP_7 => Some(VirtualKeyCode::Numpad7),
+        keysyms::XKB_KEY_KP_8 => Some(VirtualKeyCode::Numpad8),
+        keysyms::XKB_KEY_KP_9 => Some(VirtualKeyCode::Numpad9),
+        // Misc.
+        // => Some(VirtualKeyCode::AbntC1),
+        // => Some(VirtualKeyCode::AbntC2),
+        keysyms::XKB_KEY_plus => Some(VirtualKeyCode::Plus),
+        keysyms::XKB_KEY_apostrophe => Some(VirtualKeyCode::Apostrophe),
+        // => Some(VirtualKeyCode::Apps),
+        keysyms::XKB_KEY_at => Some(VirtualKeyCode::At),
+        // => Some(VirtualKeyCode::Ax),
+        keysyms::XKB_KEY_backslash => Some(VirtualKeyCode::Backslash),
+        keysyms::XKB_KEY_XF86Calculator => Some(VirtualKeyCode::Calculator),
+        // => Some(VirtualKeyCode::Capital),
+        keysyms::XKB_KEY_colon => Some(VirtualKeyCode::Colon),
+        keysyms::XKB_KEY_comma => Some(VirtualKeyCode::Comma),
+        // => Some(VirtualKeyCode::Convert),
+        keysyms::XKB_KEY_equal => Some(VirtualKeyCode::Equals),
+        keysyms::XKB_KEY_grave => Some(VirtualKeyCode::Grave),
+        // => Some(VirtualKeyCode::Kana),
+        keysyms::XKB_KEY_Kanji => Some(VirtualKeyCode::Kanji),
+        keysyms::XKB_KEY_Alt_L => Some(VirtualKeyCode::LAlt),
+        keysyms::XKB_KEY_bracketleft => Some(VirtualKeyCode::LBracket),
+        keysyms::XKB_KEY_Control_L => Some(VirtualKeyCode::LControl),
+        keysyms::XKB_KEY_Shift_L => Some(VirtualKeyCode::LShift),
+        keysyms::XKB_KEY_Super_L => Some(VirtualKeyCode::LWin),
+        keysyms::XKB_KEY_XF86Mail => Some(VirtualKeyCode::Mail),
+        // => Some(VirtualKeyCode::MediaSelect),
+        // => Some(VirtualKeyCode::MediaStop),
+        keysyms::XKB_KEY_minus => Some(VirtualKeyCode::Minus),
+        keysyms::XKB_KEY_asterisk => Some(VirtualKeyCode::Asterisk),
+        keysyms::XKB_KEY_XF86AudioMute => Some(VirtualKeyCode::Mute),
+        // => Some(VirtualKeyCode::MyComputer),
+        keysyms::XKB_KEY_XF86AudioNext => Some(VirtualKeyCode::NextTrack),
+        // => Some(VirtualKeyCode::NoConvert),
+        keysyms::XKB_KEY_KP_Separator => Some(VirtualKeyCode::NumpadComma),
+        keysyms::XKB_KEY_KP_Enter => Some(VirtualKeyCode::NumpadEnter),
+        keysyms::XKB_KEY_KP_Equal => Some(VirtualKeyCode::NumpadEquals),
+        keysyms::XKB_KEY_KP_Add => Some(VirtualKeyCode::NumpadAdd),
+        keysyms::XKB_KEY_KP_Subtract => Some(VirtualKeyCode::NumpadSubtract),
+        keysyms::XKB_KEY_KP_Multiply => Some(VirtualKeyCode::NumpadMultiply),
+        keysyms::XKB_KEY_KP_Divide => Some(VirtualKeyCode::NumpadDivide),
+        keysyms::XKB_KEY_KP_Decimal => Some(VirtualKeyCode::NumpadDecimal),
+        keysyms::XKB_KEY_KP_Page_Up => Some(VirtualKeyCode::PageUp),
+        keysyms::XKB_KEY_KP_Page_Down => Some(VirtualKeyCode::PageDown),
+        keysyms::XKB_KEY_KP_Home => Some(VirtualKeyCode::Home),
+        keysyms::XKB_KEY_KP_End => Some(VirtualKeyCode::End),
+        keysyms::XKB_KEY_KP_Left => Some(VirtualKeyCode::Left),
+        keysyms::XKB_KEY_KP_Up => Some(VirtualKeyCode::Up),
+        keysyms::XKB_KEY_KP_Right => Some(VirtualKeyCode::Right),
+        keysyms::XKB_KEY_KP_Down => Some(VirtualKeyCode::Down),
+        // => Some(VirtualKeyCode::OEM102),
+        keysyms::XKB_KEY_period => Some(VirtualKeyCode::Period),
+        // => Some(VirtualKeyCode::Playpause),
+        keysyms::XKB_KEY_XF86PowerOff => Some(VirtualKeyCode::Power),
+        keysyms::XKB_KEY_XF86AudioPrev => Some(VirtualKeyCode::PrevTrack),
+        keysyms::XKB_KEY_Alt_R => Some(VirtualKeyCode::RAlt),
+        keysyms::XKB_KEY_bracketright => Some(VirtualKeyCode::RBracket),
+        keysyms::XKB_KEY_Control_R => Some(VirtualKeyCode::RControl),
+        keysyms::XKB_KEY_Shift_R => Some(VirtualKeyCode::RShift),
+        keysyms::XKB_KEY_Super_R => Some(VirtualKeyCode::RWin),
+        keysyms::XKB_KEY_semicolon => Some(VirtualKeyCode::Semicolon),
+        keysyms::XKB_KEY_slash => Some(VirtualKeyCode::Slash),
+        keysyms::XKB_KEY_XF86Sleep => Some(VirtualKeyCode::Sleep),
+        // => Some(VirtualKeyCode::Stop),
+        // => Some(VirtualKeyCode::Sysrq),
+        keysyms::XKB_KEY_Tab => Some(VirtualKeyCode::Tab),
+        keysyms::XKB_KEY_ISO_Left_Tab => Some(VirtualKeyCode::Tab),
+        keysyms::XKB_KEY_underscore => Some(VirtualKeyCode::Underline),
+        // => Some(VirtualKeyCode::Unlabeled),
+        keysyms::XKB_KEY_XF86AudioLowerVolume => Some(VirtualKeyCode::VolumeDown),
+        keysyms::XKB_KEY_XF86AudioRaiseVolume => Some(VirtualKeyCode::VolumeUp),
+        // => Some(VirtualKeyCode::Wake),
+        // => Some(VirtualKeyCode::Webback),
+        // => Some(VirtualKeyCode::WebFavorites),
+        // => Some(VirtualKeyCode::WebForward),
+        // => Some(VirtualKeyCode::WebHome),
+        // => Some(VirtualKeyCode::WebRefresh),
+        // => Some(VirtualKeyCode::WebSearch),
+        // => Some(VirtualKeyCode::WebStop),
+        keysyms::XKB_KEY_yen => Some(VirtualKeyCode::Yen),
+        keysyms::XKB_KEY_XF86Copy => Some(VirtualKeyCode::Copy),
+        keysyms::XKB_KEY_XF86Paste => Some(VirtualKeyCode::Paste),
+        keysyms::XKB_KEY_XF86Cut => Some(VirtualKeyCode::Cut),
+        // Fallback.
+        _ => None,
+    }
+}

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

@@ -0,0 +1,105 @@
+//! Wayland keyboard handling.
+
+use std::cell::RefCell;
+use std::rc::Rc;
+
+use sctk::reexports::client::protocol::wl_keyboard::WlKeyboard;
+use sctk::reexports::client::protocol::wl_seat::WlSeat;
+use sctk::reexports::client::Attached;
+
+use sctk::reexports::calloop::{LoopHandle, Source};
+
+use sctk::seat::keyboard::{self, RepeatSource};
+
+use crate::event::ModifiersState;
+use crate::platform_impl::wayland::event_loop::WinitState;
+use crate::platform_impl::wayland::WindowId;
+
+mod handlers;
+mod keymap;
+
+pub(crate) struct Keyboard {
+    pub keyboard: WlKeyboard,
+
+    /// The source for repeat keys.
+    pub repeat_source: Option<Source<RepeatSource>>,
+
+    /// LoopHandle to drop `RepeatSource`, when dropping the keyboard.
+    pub loop_handle: LoopHandle<WinitState>,
+}
+
+impl Keyboard {
+    pub fn new(
+        seat: &Attached<WlSeat>,
+        loop_handle: LoopHandle<WinitState>,
+        modifiers_state: Rc<RefCell<ModifiersState>>,
+    ) -> Option<Self> {
+        let mut inner = KeyboardInner::new(modifiers_state);
+        let keyboard_data = keyboard::map_keyboard_repeat(
+            loop_handle.clone(),
+            &seat,
+            None,
+            keyboard::RepeatKind::System,
+            move |event, _, mut dispatch_data| {
+                let winit_state = dispatch_data.get::<WinitState>().unwrap();
+                handlers::handle_keyboard(event, &mut inner, winit_state);
+            },
+        );
+
+        let (keyboard, repeat_source) = keyboard_data.ok()?;
+
+        Some(Self {
+            keyboard,
+            loop_handle,
+            repeat_source: Some(repeat_source),
+        })
+    }
+}
+
+impl Drop for Keyboard {
+    fn drop(&mut self) {
+        if self.keyboard.as_ref().version() >= 3 {
+            self.keyboard.release();
+        }
+
+        if let Some(repeat_source) = self.repeat_source.take() {
+            self.loop_handle.remove(repeat_source);
+        }
+    }
+}
+
+struct KeyboardInner {
+    /// Currently focused surface.
+    target_window_id: Option<WindowId>,
+
+    /// A pending state of modifiers.
+    ///
+    /// This state is getting set if we've got a modifiers update
+    /// before `Enter` event, which shouldn't happen in general, however
+    /// some compositors are still doing so.
+    pending_modifers_state: Option<ModifiersState>,
+
+    /// Current state of modifiers keys.
+    modifiers_state: Rc<RefCell<ModifiersState>>,
+}
+
+impl KeyboardInner {
+    fn new(modifiers_state: Rc<RefCell<ModifiersState>>) -> Self {
+        Self {
+            target_window_id: None,
+            pending_modifers_state: None,
+            modifiers_state,
+        }
+    }
+}
+
+impl From<keyboard::ModifiersState> for ModifiersState {
+    fn from(mods: keyboard::ModifiersState) -> ModifiersState {
+        let mut wl_mods = ModifiersState::empty();
+        wl_mods.set(ModifiersState::SHIFT, mods.shift);
+        wl_mods.set(ModifiersState::CTRL, mods.ctrl);
+        wl_mods.set(ModifiersState::ALT, mods.alt);
+        wl_mods.set(ModifiersState::LOGO, mods.logo);
+        wl_mods
+    }
+}

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

@@ -0,0 +1,208 @@
+//! Seat handling and managing.
+
+use std::cell::RefCell;
+use std::rc::Rc;
+
+use sctk::reexports::protocols::unstable::relative_pointer::v1::client::zwp_relative_pointer_manager_v1::ZwpRelativePointerManagerV1;
+use sctk::reexports::protocols::unstable::pointer_constraints::v1::client::zwp_pointer_constraints_v1::ZwpPointerConstraintsV1;
+use sctk::reexports::protocols::unstable::text_input::v3::client::zwp_text_input_manager_v3::ZwpTextInputManagerV3;
+
+use sctk::reexports::client::protocol::wl_seat::WlSeat;
+use sctk::reexports::client::Attached;
+
+use sctk::environment::Environment;
+use sctk::reexports::calloop::LoopHandle;
+use sctk::seat::pointer::ThemeManager;
+use sctk::seat::{SeatData, SeatListener};
+
+use super::env::WinitEnv;
+use super::event_loop::WinitState;
+use crate::event::ModifiersState;
+
+mod keyboard;
+pub mod pointer;
+pub mod text_input;
+mod touch;
+
+use keyboard::Keyboard;
+use pointer::Pointers;
+use text_input::TextInput;
+use touch::Touch;
+
+pub struct SeatManager {
+    /// Listener for seats.
+    _seat_listener: SeatListener,
+}
+
+impl SeatManager {
+    pub fn new(
+        env: &Environment<WinitEnv>,
+        loop_handle: LoopHandle<WinitState>,
+        theme_manager: ThemeManager,
+    ) -> Self {
+        let relative_pointer_manager = env.get_global::<ZwpRelativePointerManagerV1>();
+        let pointer_constraints = env.get_global::<ZwpPointerConstraintsV1>();
+        let text_input_manager = env.get_global::<ZwpTextInputManagerV3>();
+
+        let mut inner = SeatManagerInner::new(
+            theme_manager,
+            relative_pointer_manager,
+            pointer_constraints,
+            text_input_manager,
+            loop_handle,
+        );
+
+        // Handle existing seats.
+        for seat in env.get_all_seats() {
+            let seat_data = match sctk::seat::clone_seat_data(&seat) {
+                Some(seat_data) => seat_data,
+                None => continue,
+            };
+
+            inner.process_seat_update(&seat, &seat_data);
+        }
+
+        let seat_listener = env.listen_for_seats(move |seat, seat_data, _| {
+            inner.process_seat_update(&seat, &seat_data);
+        });
+
+        Self {
+            _seat_listener: seat_listener,
+        }
+    }
+}
+
+/// Inner state of the seat manager.
+struct SeatManagerInner {
+    /// Currently observed seats.
+    seats: Vec<SeatInfo>,
+
+    /// Loop handle.
+    loop_handle: LoopHandle<WinitState>,
+
+    /// Relative pointer manager.
+    relative_pointer_manager: Option<Attached<ZwpRelativePointerManagerV1>>,
+
+    /// Pointer constraints.
+    pointer_constraints: Option<Attached<ZwpPointerConstraintsV1>>,
+
+    /// Text input manager.
+    text_input_manager: Option<Attached<ZwpTextInputManagerV3>>,
+
+    /// A theme manager.
+    theme_manager: ThemeManager,
+}
+
+impl SeatManagerInner {
+    fn new(
+        theme_manager: ThemeManager,
+        relative_pointer_manager: Option<Attached<ZwpRelativePointerManagerV1>>,
+        pointer_constraints: Option<Attached<ZwpPointerConstraintsV1>>,
+        text_input_manager: Option<Attached<ZwpTextInputManagerV3>>,
+        loop_handle: LoopHandle<WinitState>,
+    ) -> Self {
+        Self {
+            seats: Vec::new(),
+            loop_handle,
+            relative_pointer_manager,
+            pointer_constraints,
+            text_input_manager,
+            theme_manager,
+        }
+    }
+
+    /// Handle seats update from the `SeatListener`.
+    pub fn process_seat_update(&mut self, seat: &Attached<WlSeat>, seat_data: &SeatData) {
+        let detached_seat = seat.detach();
+
+        let position = self.seats.iter().position(|si| si.seat == detached_seat);
+        let index = position.unwrap_or_else(|| {
+            self.seats.push(SeatInfo::new(detached_seat));
+            self.seats.len() - 1
+        });
+
+        let seat_info = &mut self.seats[index];
+
+        // Pointer handling.
+        if seat_data.has_pointer && !seat_data.defunct {
+            if seat_info.pointer.is_none() {
+                seat_info.pointer = Some(Pointers::new(
+                    &seat,
+                    &self.theme_manager,
+                    &self.relative_pointer_manager,
+                    &self.pointer_constraints,
+                    seat_info.modifiers_state.clone(),
+                ));
+            }
+        } else {
+            seat_info.pointer = None;
+        }
+
+        // Handle keyboard.
+        if seat_data.has_keyboard && !seat_data.defunct {
+            if seat_info.keyboard.is_none() {
+                seat_info.keyboard = Keyboard::new(
+                    &seat,
+                    self.loop_handle.clone(),
+                    seat_info.modifiers_state.clone(),
+                );
+            }
+        } else {
+            seat_info.keyboard = None;
+        }
+
+        // Handle touch.
+        if seat_data.has_touch && !seat_data.defunct {
+            if seat_info.touch.is_none() {
+                seat_info.touch = Some(Touch::new(&seat));
+            }
+        } else {
+            seat_info.touch = None;
+        }
+
+        // Handle text input.
+        if let Some(text_input_manager) = self.text_input_manager.as_ref() {
+            if seat_data.defunct {
+                seat_info.text_input = None;
+            } else if seat_info.text_input.is_none() {
+                seat_info.text_input = Some(TextInput::new(&seat, &text_input_manager));
+            }
+        }
+    }
+}
+
+/// Resources associtated with a given seat.
+struct SeatInfo {
+    /// Seat to which this `SeatInfo` belongs.
+    seat: WlSeat,
+
+    /// A keyboard handle with its repeat rate handling.
+    keyboard: Option<Keyboard>,
+
+    /// All pointers we're using on a seat.
+    pointer: Option<Pointers>,
+
+    /// Touch handling.
+    touch: Option<Touch>,
+
+    /// Text input handling aka IME.
+    text_input: Option<TextInput>,
+
+    /// The current state of modifiers observed in keyboard handler.
+    ///
+    /// We keep modifiers state on a seat, since it's being used by pointer events as well.
+    modifiers_state: Rc<RefCell<ModifiersState>>,
+}
+
+impl SeatInfo {
+    pub fn new(seat: WlSeat) -> Self {
+        Self {
+            seat,
+            keyboard: None,
+            pointer: None,
+            touch: None,
+            text_input: None,
+            modifiers_state: Rc::new(RefCell::new(ModifiersState::default())),
+        }
+    }
+}

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

@@ -0,0 +1,74 @@
+//! Data which is used in pointer callbacks.
+
+use std::cell::{Cell, RefCell};
+use std::rc::Rc;
+
+use sctk::reexports::client::protocol::wl_surface::WlSurface;
+use sctk::reexports::client::Attached;
+use sctk::reexports::protocols::unstable::pointer_constraints::v1::client::zwp_pointer_constraints_v1::{ZwpPointerConstraintsV1};
+use sctk::reexports::protocols::unstable::pointer_constraints::v1::client::zwp_confined_pointer_v1::ZwpConfinedPointerV1;
+
+use crate::event::{ModifiersState, TouchPhase};
+
+/// A data being used by pointer handlers.
+pub(super) struct PointerData {
+    /// Winit's surface the pointer is currently over.
+    pub surface: Option<WlSurface>,
+
+    /// Current modifiers state.
+    ///
+    /// This refers a state of modifiers from `WlKeyboard` on
+    /// the given seat.
+    pub modifiers_state: Rc<RefCell<ModifiersState>>,
+
+    /// Pointer constraints.
+    pub pointer_constraints: Option<Attached<ZwpPointerConstraintsV1>>,
+
+    pub confined_pointer: Rc<RefCell<Option<ZwpConfinedPointerV1>>>,
+
+    /// A latest event serial.
+    pub latest_serial: Rc<Cell<u32>>,
+
+    /// The currently accumulated axis data on a pointer.
+    pub axis_data: AxisData,
+}
+
+impl PointerData {
+    pub fn new(
+        confined_pointer: Rc<RefCell<Option<ZwpConfinedPointerV1>>>,
+        pointer_constraints: Option<Attached<ZwpPointerConstraintsV1>>,
+        modifiers_state: Rc<RefCell<ModifiersState>>,
+    ) -> Self {
+        Self {
+            surface: None,
+            latest_serial: Rc::new(Cell::new(0)),
+            confined_pointer,
+            modifiers_state,
+            pointer_constraints,
+            axis_data: AxisData::new(),
+        }
+    }
+}
+
+/// Axis data.
+#[derive(Clone, Copy)]
+pub(super) struct AxisData {
+    /// Current state of the axis.
+    pub axis_state: TouchPhase,
+
+    /// A buffer for `PixelDelta` event.
+    pub axis_buffer: Option<(f32, f32)>,
+
+    /// A buffer for `LineDelta` event.
+    pub axis_discrete_buffer: Option<(f32, f32)>,
+}
+
+impl AxisData {
+    pub fn new() -> Self {
+        Self {
+            axis_state: TouchPhase::Ended,
+            axis_buffer: None,
+            axis_discrete_buffer: None,
+        }
+    }
+}

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

@@ -0,0 +1,301 @@
+//! Handlers for the pointers we're using.
+
+use std::cell::RefCell;
+use std::rc::Rc;
+
+use sctk::reexports::client::protocol::wl_pointer::{self, Event as PointerEvent};
+use sctk::reexports::protocols::unstable::relative_pointer::v1::client::zwp_relative_pointer_v1::Event as RelativePointerEvent;
+
+use sctk::seat::pointer::ThemedPointer;
+
+use crate::dpi::LogicalPosition;
+use crate::event::{
+    DeviceEvent, ElementState, MouseButton, MouseScrollDelta, TouchPhase, WindowEvent,
+};
+use crate::platform_impl::wayland::event_loop::WinitState;
+use crate::platform_impl::wayland::{self, DeviceId};
+
+use super::{PointerData, WinitPointer};
+
+// These values are comming from <linux/input-event-codes.h>.
+const BTN_LEFT: u32 = 0x110;
+const BTN_RIGHT: u32 = 0x111;
+const BTN_MIDDLE: u32 = 0x112;
+
+#[inline]
+pub(super) fn handle_pointer(
+    pointer: ThemedPointer,
+    event: PointerEvent,
+    pointer_data: &Rc<RefCell<PointerData>>,
+    winit_state: &mut WinitState,
+) {
+    let event_sink = &mut winit_state.event_sink;
+    let mut pointer_data = pointer_data.borrow_mut();
+    match event {
+        PointerEvent::Enter {
+            surface,
+            surface_x,
+            surface_y,
+            serial,
+            ..
+        } => {
+            pointer_data.latest_serial.replace(serial);
+
+            let window_id = wayland::make_wid(&surface);
+            if !winit_state.window_map.contains_key(&window_id) {
+                return;
+            }
+            let window_handle = match winit_state.window_map.get_mut(&window_id) {
+                Some(window_handle) => window_handle,
+                None => return,
+            };
+
+            let scale_factor = sctk::get_surface_scale_factor(&surface) as f64;
+            pointer_data.surface = Some(surface);
+
+            // Notify window that pointer entered the surface.
+            let winit_pointer = WinitPointer {
+                pointer,
+                confined_pointer: Rc::downgrade(&pointer_data.confined_pointer),
+                pointer_constraints: pointer_data.pointer_constraints.clone(),
+                latest_serial: pointer_data.latest_serial.clone(),
+            };
+            window_handle.pointer_entered(winit_pointer);
+
+            event_sink.push_window_event(
+                WindowEvent::CursorEntered {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                },
+                window_id,
+            );
+
+            let position = LogicalPosition::new(surface_x, surface_y).to_physical(scale_factor);
+
+            event_sink.push_window_event(
+                WindowEvent::CursorMoved {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    position,
+                    modifiers: *pointer_data.modifiers_state.borrow(),
+                },
+                window_id,
+            );
+        }
+        PointerEvent::Leave { surface, serial } => {
+            pointer_data.surface = None;
+            pointer_data.latest_serial.replace(serial);
+
+            let window_id = wayland::make_wid(&surface);
+
+            let window_handle = match winit_state.window_map.get_mut(&window_id) {
+                Some(window_handle) => window_handle,
+                None => return,
+            };
+
+            // Notify a window that pointer is no longer observing it.
+            let winit_pointer = WinitPointer {
+                pointer,
+                confined_pointer: Rc::downgrade(&pointer_data.confined_pointer),
+                pointer_constraints: pointer_data.pointer_constraints.clone(),
+                latest_serial: pointer_data.latest_serial.clone(),
+            };
+            window_handle.pointer_left(winit_pointer);
+
+            event_sink.push_window_event(
+                WindowEvent::CursorLeft {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                },
+                window_id,
+            );
+        }
+        PointerEvent::Motion {
+            surface_x,
+            surface_y,
+            ..
+        } => {
+            let surface = match pointer_data.surface.as_ref() {
+                Some(surface) => surface,
+                None => return,
+            };
+
+            let window_id = wayland::make_wid(surface);
+
+            let scale_factor = sctk::get_surface_scale_factor(&surface) as f64;
+            let position = LogicalPosition::new(surface_x, surface_y).to_physical(scale_factor);
+
+            event_sink.push_window_event(
+                WindowEvent::CursorMoved {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    position,
+                    modifiers: *pointer_data.modifiers_state.borrow(),
+                },
+                window_id,
+            );
+        }
+        PointerEvent::Button {
+            button,
+            state,
+            serial,
+            ..
+        } => {
+            pointer_data.latest_serial.replace(serial);
+            let window_id = match pointer_data.surface.as_ref().map(wayland::make_wid) {
+                Some(window_id) => window_id,
+                None => return,
+            };
+
+            let state = match state {
+                wl_pointer::ButtonState::Pressed => ElementState::Pressed,
+                wl_pointer::ButtonState::Released => ElementState::Released,
+                _ => unreachable!(),
+            };
+
+            let button = match button {
+                BTN_LEFT => MouseButton::Left,
+                BTN_RIGHT => MouseButton::Right,
+                BTN_MIDDLE => MouseButton::Middle,
+                button => MouseButton::Other(button as u16),
+            };
+
+            event_sink.push_window_event(
+                WindowEvent::MouseInput {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    state,
+                    button,
+                    modifiers: *pointer_data.modifiers_state.borrow(),
+                },
+                window_id,
+            );
+        }
+        PointerEvent::Axis { axis, value, .. } => {
+            let surface = match pointer_data.surface.as_ref() {
+                Some(surface) => surface,
+                None => return,
+            };
+
+            let window_id = wayland::make_wid(&surface);
+
+            if pointer.as_ref().version() < 5 {
+                let (mut x, mut y) = (0.0, 0.0);
+
+                // Old seat compatibility.
+                match axis {
+                    // Wayland vertical sign convention is the inverse of winit.
+                    wl_pointer::Axis::VerticalScroll => y -= value as f32,
+                    wl_pointer::Axis::HorizontalScroll => x += value as f32,
+                    _ => unreachable!(),
+                }
+
+                let scale_factor = sctk::get_surface_scale_factor(&surface) as f64;
+                let delta = LogicalPosition::new(x as f64, y as f64).to_physical(scale_factor);
+
+                event_sink.push_window_event(
+                    WindowEvent::MouseWheel {
+                        device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                            DeviceId,
+                        )),
+                        delta: MouseScrollDelta::PixelDelta(delta),
+                        phase: TouchPhase::Moved,
+                        modifiers: *pointer_data.modifiers_state.borrow(),
+                    },
+                    window_id,
+                );
+            } else {
+                let (mut x, mut y) = pointer_data.axis_data.axis_buffer.unwrap_or((0.0, 0.0));
+                match axis {
+                    // Wayland vertical sign convention is the inverse of winit.
+                    wl_pointer::Axis::VerticalScroll => y -= value as f32,
+                    wl_pointer::Axis::HorizontalScroll => x += value as f32,
+                    _ => unreachable!(),
+                }
+
+                pointer_data.axis_data.axis_buffer = Some((x, y));
+
+                pointer_data.axis_data.axis_state = match pointer_data.axis_data.axis_state {
+                    TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
+                    _ => TouchPhase::Started,
+                }
+            }
+        }
+        PointerEvent::AxisDiscrete { axis, discrete } => {
+            let (mut x, mut y) = pointer_data
+                .axis_data
+                .axis_discrete_buffer
+                .unwrap_or((0., 0.));
+
+            match axis {
+                // Wayland vertical sign convention is the inverse of winit.
+                wl_pointer::Axis::VerticalScroll => y -= discrete as f32,
+                wl_pointer::Axis::HorizontalScroll => x += discrete as f32,
+                _ => unreachable!(),
+            }
+
+            pointer_data.axis_data.axis_discrete_buffer = Some((x, y));
+
+            pointer_data.axis_data.axis_state = match pointer_data.axis_data.axis_state {
+                TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
+                _ => TouchPhase::Started,
+            }
+        }
+        PointerEvent::AxisSource { .. } => (),
+        PointerEvent::AxisStop { .. } => {
+            pointer_data.axis_data.axis_state = TouchPhase::Ended;
+        }
+        PointerEvent::Frame => {
+            let axis_buffer = pointer_data.axis_data.axis_buffer.take();
+            let axis_discrete_buffer = pointer_data.axis_data.axis_discrete_buffer.take();
+
+            let surface = match pointer_data.surface.as_ref() {
+                Some(surface) => surface,
+                None => return,
+            };
+            let window_id = wayland::make_wid(&surface);
+
+            let window_event = if let Some((x, y)) = axis_discrete_buffer {
+                WindowEvent::MouseWheel {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    delta: MouseScrollDelta::LineDelta(x, y),
+                    phase: pointer_data.axis_data.axis_state,
+                    modifiers: *pointer_data.modifiers_state.borrow(),
+                }
+            } else if let Some((x, y)) = axis_buffer {
+                let scale_factor = sctk::get_surface_scale_factor(&surface) as f64;
+                let delta = LogicalPosition::new(x, y).to_physical(scale_factor);
+
+                WindowEvent::MouseWheel {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    delta: MouseScrollDelta::PixelDelta(delta),
+                    phase: pointer_data.axis_data.axis_state,
+                    modifiers: *pointer_data.modifiers_state.borrow(),
+                }
+            } else {
+                return;
+            };
+
+            event_sink.push_window_event(window_event, window_id);
+        }
+        _ => (),
+    }
+}
+
+#[inline]
+pub(super) fn handle_relative_pointer(event: RelativePointerEvent, winit_state: &mut WinitState) {
+    if let RelativePointerEvent::RelativeMotion { dx, dy, .. } = event {
+        winit_state
+            .event_sink
+            .push_device_event(DeviceEvent::MouseMotion { delta: (dx, dy) }, DeviceId)
+    }
+}

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

@@ -0,0 +1,242 @@
+//! All pointer related handling.
+
+use std::cell::{Cell, RefCell};
+use std::rc::{Rc, Weak};
+
+use sctk::reexports::client::protocol::wl_pointer::WlPointer;
+use sctk::reexports::client::protocol::wl_seat::WlSeat;
+use sctk::reexports::client::protocol::wl_surface::WlSurface;
+use sctk::reexports::client::Attached;
+use sctk::reexports::protocols::unstable::relative_pointer::v1::client::zwp_relative_pointer_manager_v1::ZwpRelativePointerManagerV1;
+use sctk::reexports::protocols::unstable::relative_pointer::v1::client::zwp_relative_pointer_v1::ZwpRelativePointerV1;
+use sctk::reexports::protocols::unstable::pointer_constraints::v1::client::zwp_pointer_constraints_v1::{ZwpPointerConstraintsV1, Lifetime};
+use sctk::reexports::protocols::unstable::pointer_constraints::v1::client::zwp_confined_pointer_v1::ZwpConfinedPointerV1;
+
+use sctk::seat::pointer::{ThemeManager, ThemedPointer};
+
+use crate::event::ModifiersState;
+use crate::platform_impl::wayland::event_loop::WinitState;
+use crate::window::CursorIcon;
+
+mod data;
+mod handlers;
+
+use data::PointerData;
+
+/// A proxy to Wayland pointer, which serves requests from a `WindowHandle`.
+pub struct WinitPointer {
+    pointer: ThemedPointer,
+
+    /// Create confined pointers.
+    pointer_constraints: Option<Attached<ZwpPointerConstraintsV1>>,
+
+    /// Cursor to handle confine requests.
+    confined_pointer: Weak<RefCell<Option<ZwpConfinedPointerV1>>>,
+
+    /// Latest observed serial in pointer events.
+    latest_serial: Rc<Cell<u32>>,
+}
+
+impl PartialEq for WinitPointer {
+    fn eq(&self, other: &Self) -> bool {
+        *self.pointer == *other.pointer
+    }
+}
+
+impl Eq for WinitPointer {}
+
+impl WinitPointer {
+    /// Set the cursor icon.
+    ///
+    /// Providing `None` will hide the cursor.
+    pub fn set_cursor(&self, cursor_icon: Option<CursorIcon>) {
+        let cursor_icon = match cursor_icon {
+            Some(cursor_icon) => cursor_icon,
+            None => {
+                // Hide the cursor.
+                (*self.pointer).set_cursor(self.latest_serial.get(), None, 0, 0);
+                return;
+            }
+        };
+
+        let cursors: &[&str] = match cursor_icon {
+            CursorIcon::Alias => &["link"],
+            CursorIcon::Arrow => &["arrow"],
+            CursorIcon::Cell => &["plus"],
+            CursorIcon::Copy => &["copy"],
+            CursorIcon::Crosshair => &["crosshair"],
+            CursorIcon::Default => &["left_ptr"],
+            CursorIcon::Hand => &["hand"],
+            CursorIcon::Help => &["question_arrow"],
+            CursorIcon::Move => &["move"],
+            CursorIcon::Grab => &["openhand", "grab"],
+            CursorIcon::Grabbing => &["closedhand", "grabbing"],
+            CursorIcon::Progress => &["progress"],
+            CursorIcon::AllScroll => &["all-scroll"],
+            CursorIcon::ContextMenu => &["context-menu"],
+
+            CursorIcon::NoDrop => &["no-drop", "circle"],
+            CursorIcon::NotAllowed => &["crossed_circle"],
+
+            // Resize cursors
+            CursorIcon::EResize => &["right_side"],
+            CursorIcon::NResize => &["top_side"],
+            CursorIcon::NeResize => &["top_right_corner"],
+            CursorIcon::NwResize => &["top_left_corner"],
+            CursorIcon::SResize => &["bottom_side"],
+            CursorIcon::SeResize => &["bottom_right_corner"],
+            CursorIcon::SwResize => &["bottom_left_corner"],
+            CursorIcon::WResize => &["left_side"],
+            CursorIcon::EwResize => &["h_double_arrow"],
+            CursorIcon::NsResize => &["v_double_arrow"],
+            CursorIcon::NwseResize => &["bd_double_arrow", "size_bdiag"],
+            CursorIcon::NeswResize => &["fd_double_arrow", "size_fdiag"],
+            CursorIcon::ColResize => &["split_h", "h_double_arrow"],
+            CursorIcon::RowResize => &["split_v", "v_double_arrow"],
+            CursorIcon::Text => &["text", "xterm"],
+            CursorIcon::VerticalText => &["vertical-text"],
+
+            CursorIcon::Wait => &["watch"],
+
+            CursorIcon::ZoomIn => &["zoom-in"],
+            CursorIcon::ZoomOut => &["zoom-out"],
+        };
+
+        let serial = Some(self.latest_serial.get());
+        for cursor in cursors {
+            if self.pointer.set_cursor(cursor, serial).is_ok() {
+                break;
+            }
+        }
+    }
+
+    /// Confine the pointer to a surface.
+    pub fn confine(&self, surface: &WlSurface) {
+        let pointer_constraints = match &self.pointer_constraints {
+            Some(pointer_constraints) => pointer_constraints,
+            None => return,
+        };
+
+        let confined_pointer = match self.confined_pointer.upgrade() {
+            Some(confined_pointer) => confined_pointer,
+            // A pointer is gone.
+            None => return,
+        };
+
+        *confined_pointer.borrow_mut() = Some(init_confined_pointer(
+            &pointer_constraints,
+            &surface,
+            &*self.pointer,
+        ));
+    }
+
+    /// Tries to unconfine the pointer if the current pointer is confined.
+    pub fn unconfine(&self) {
+        let confined_pointer = match self.confined_pointer.upgrade() {
+            Some(confined_pointer) => confined_pointer,
+            // A pointer is gone.
+            None => return,
+        };
+
+        let mut confined_pointer = confined_pointer.borrow_mut();
+
+        if let Some(confined_pointer) = confined_pointer.take() {
+            confined_pointer.destroy();
+        }
+    }
+}
+
+/// A pointer wrapper for easy releasing and managing pointers.
+pub(super) struct Pointers {
+    /// A pointer itself.
+    pointer: ThemedPointer,
+
+    /// A relative pointer handler.
+    relative_pointer: Option<ZwpRelativePointerV1>,
+
+    /// Confined pointer.
+    confined_pointer: Rc<RefCell<Option<ZwpConfinedPointerV1>>>,
+}
+
+impl Pointers {
+    pub(super) fn new(
+        seat: &Attached<WlSeat>,
+        theme_manager: &ThemeManager,
+        relative_pointer_manager: &Option<Attached<ZwpRelativePointerManagerV1>>,
+        pointer_constraints: &Option<Attached<ZwpPointerConstraintsV1>>,
+        modifiers_state: Rc<RefCell<ModifiersState>>,
+    ) -> Self {
+        let confined_pointer = Rc::new(RefCell::new(None));
+        let pointer_data = Rc::new(RefCell::new(PointerData::new(
+            confined_pointer.clone(),
+            pointer_constraints.clone(),
+            modifiers_state,
+        )));
+        let pointer = theme_manager.theme_pointer_with_impl(
+            seat,
+            move |event, pointer, mut dispatch_data| {
+                let winit_state = dispatch_data.get::<WinitState>().unwrap();
+                handlers::handle_pointer(pointer, event, &pointer_data, winit_state);
+            },
+        );
+
+        // Setup relative_pointer if it's available.
+        let relative_pointer = match relative_pointer_manager.as_ref() {
+            Some(relative_pointer_manager) => {
+                Some(init_relative_pointer(&relative_pointer_manager, &*pointer))
+            }
+            None => None,
+        };
+
+        Self {
+            pointer,
+            relative_pointer,
+            confined_pointer,
+        }
+    }
+}
+
+impl Drop for Pointers {
+    fn drop(&mut self) {
+        // Drop relative pointer.
+        if let Some(relative_pointer) = self.relative_pointer.take() {
+            relative_pointer.destroy();
+        }
+
+        // Drop confined pointer.
+        if let Some(confined_pointer) = self.confined_pointer.borrow_mut().take() {
+            confined_pointer.destroy();
+        }
+
+        // Drop the pointer itself in case it's possible.
+        if self.pointer.as_ref().version() >= 3 {
+            self.pointer.release();
+        }
+    }
+}
+
+pub(super) fn init_relative_pointer(
+    relative_pointer_manager: &ZwpRelativePointerManagerV1,
+    pointer: &WlPointer,
+) -> ZwpRelativePointerV1 {
+    let relative_pointer = relative_pointer_manager.get_relative_pointer(&*pointer);
+    relative_pointer.quick_assign(move |_, event, mut dispatch_data| {
+        let winit_state = dispatch_data.get::<WinitState>().unwrap();
+        handlers::handle_relative_pointer(event, winit_state);
+    });
+
+    relative_pointer.detach()
+}
+
+pub(super) fn init_confined_pointer(
+    pointer_constraints: &Attached<ZwpPointerConstraintsV1>,
+    surface: &WlSurface,
+    pointer: &WlPointer,
+) -> ZwpConfinedPointerV1 {
+    let confined_pointer =
+        pointer_constraints.confine_pointer(surface, pointer, None, Lifetime::Persistent.to_raw());
+
+    confined_pointer.quick_assign(move |_, _, _| {});
+
+    confined_pointer.detach()
+}

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

@@ -0,0 +1,78 @@
+//! Handling of IME events.
+
+use sctk::reexports::client::Main;
+use sctk::reexports::protocols::unstable::text_input::v3::client::zwp_text_input_v3::{
+    Event as TextInputEvent, ZwpTextInputV3,
+};
+
+use crate::event::WindowEvent;
+use crate::platform_impl::wayland;
+use crate::platform_impl::wayland::event_loop::WinitState;
+
+use super::{TextInputHandler, TextInputInner};
+
+#[inline]
+pub(super) fn handle_text_input(
+    text_input: Main<ZwpTextInputV3>,
+    inner: &mut TextInputInner,
+    event: TextInputEvent,
+    winit_state: &mut WinitState,
+) {
+    let event_sink = &mut winit_state.event_sink;
+    match event {
+        TextInputEvent::Enter { surface } => {
+            let window_id = wayland::make_wid(&surface);
+
+            let window_handle = match winit_state.window_map.get_mut(&window_id) {
+                Some(window_handle) => window_handle,
+                None => return,
+            };
+            inner.target_window_id = Some(window_id);
+
+            // Enable text input on that surface.
+            text_input.enable();
+            text_input.commit();
+
+            // Notify a window we're currently over about text input handler.
+            let text_input_handler = TextInputHandler {
+                text_input: text_input.detach(),
+            };
+            window_handle.text_input_entered(text_input_handler);
+        }
+        TextInputEvent::Leave { surface } => {
+            // Always issue a disable.
+            text_input.disable();
+            text_input.commit();
+
+            let window_id = wayland::make_wid(&surface);
+
+            let window_handle = match winit_state.window_map.get_mut(&window_id) {
+                Some(window_handle) => window_handle,
+                None => return,
+            };
+
+            inner.target_window_id = None;
+
+            // Remove text input handler from the window we're leaving.
+            let text_input_handler = TextInputHandler {
+                text_input: text_input.detach(),
+            };
+            window_handle.text_input_left(text_input_handler);
+        }
+        TextInputEvent::CommitString { text } => {
+            // Update currenly commited string.
+            inner.commit_string = text;
+        }
+        TextInputEvent::Done { .. } => {
+            let (window_id, text) = match (inner.target_window_id, inner.commit_string.take()) {
+                (Some(window_id), Some(text)) => (window_id, text),
+                _ => return,
+            };
+
+            for ch in text.chars() {
+                event_sink.push_window_event(WindowEvent::ReceivedCharacter(ch), window_id);
+            }
+        }
+        _ => (),
+    }
+}

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

@@ -0,0 +1,66 @@
+use sctk::reexports::client::protocol::wl_seat::WlSeat;
+use sctk::reexports::client::Attached;
+use sctk::reexports::protocols::unstable::text_input::v3::client::zwp_text_input_manager_v3::ZwpTextInputManagerV3;
+use sctk::reexports::protocols::unstable::text_input::v3::client::zwp_text_input_v3::ZwpTextInputV3;
+
+use crate::platform_impl::wayland::event_loop::WinitState;
+use crate::platform_impl::wayland::WindowId;
+
+mod handlers;
+
+/// A handler for text input that we're advertising for `WindowHandle`.
+#[derive(Eq, PartialEq)]
+pub struct TextInputHandler {
+    text_input: ZwpTextInputV3,
+}
+
+impl TextInputHandler {
+    #[inline]
+    pub fn set_ime_position(&self, x: i32, y: i32) {
+        self.text_input.set_cursor_rectangle(x, y, 0, 0);
+        self.text_input.commit();
+    }
+}
+
+/// A wrapper around text input to automatically destroy the object on `Drop`.
+pub struct TextInput {
+    text_input: Attached<ZwpTextInputV3>,
+}
+
+impl TextInput {
+    pub fn new(seat: &Attached<WlSeat>, text_input_manager: &ZwpTextInputManagerV3) -> Self {
+        let text_input = text_input_manager.get_text_input(seat);
+        let mut text_input_inner = TextInputInner::new();
+        text_input.quick_assign(move |text_input, event, mut dispatch_data| {
+            let winit_state = dispatch_data.get::<WinitState>().unwrap();
+            handlers::handle_text_input(text_input, &mut text_input_inner, event, winit_state);
+        });
+
+        let text_input: Attached<ZwpTextInputV3> = text_input.into();
+
+        Self { text_input }
+    }
+}
+
+impl Drop for TextInput {
+    fn drop(&mut self) {
+        self.text_input.destroy();
+    }
+}
+
+struct TextInputInner {
+    /// Currently focused surface.
+    target_window_id: Option<WindowId>,
+
+    /// Pending string to commit.
+    commit_string: Option<String>,
+}
+
+impl TextInputInner {
+    fn new() -> Self {
+        Self {
+            target_window_id: None,
+            commit_string: None,
+        }
+    }
+}

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

@@ -0,0 +1,122 @@
+//! Various handlers for touch events.
+
+use sctk::reexports::client::protocol::wl_touch::Event as TouchEvent;
+
+use crate::dpi::LogicalPosition;
+use crate::event::{TouchPhase, WindowEvent};
+
+use crate::platform_impl::wayland::event_loop::WinitState;
+use crate::platform_impl::wayland::{self, DeviceId};
+
+use super::{TouchInner, TouchPoint};
+
+/// Handle WlTouch events.
+#[inline]
+pub(super) fn handle_touch(
+    event: TouchEvent,
+    inner: &mut TouchInner,
+    winit_state: &mut WinitState,
+) {
+    let event_sink = &mut winit_state.event_sink;
+
+    match event {
+        TouchEvent::Down {
+            surface, id, x, y, ..
+        } => {
+            let window_id = wayland::make_wid(&surface);
+            if !winit_state.window_map.contains_key(&window_id) {
+                return;
+            }
+
+            let scale_factor = sctk::get_surface_scale_factor(&surface) as f64;
+            let position = LogicalPosition::new(x, y);
+
+            event_sink.push_window_event(
+                WindowEvent::Touch(crate::event::Touch {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    phase: TouchPhase::Started,
+                    location: position.to_physical(scale_factor),
+                    force: None, // TODO
+                    id: id as u64,
+                }),
+                window_id,
+            );
+
+            inner
+                .touch_points
+                .push(TouchPoint::new(surface, position, id));
+        }
+        TouchEvent::Up { id, .. } => {
+            let touch_point = match inner.touch_points.iter().find(|p| p.id == id) {
+                Some(touch_point) => touch_point,
+                None => return,
+            };
+
+            let scale_factor = sctk::get_surface_scale_factor(&touch_point.surface) as f64;
+            let location = touch_point.position.to_physical(scale_factor);
+            let window_id = wayland::make_wid(&touch_point.surface);
+
+            event_sink.push_window_event(
+                WindowEvent::Touch(crate::event::Touch {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    phase: TouchPhase::Ended,
+                    location,
+                    force: None, // TODO
+                    id: id as u64,
+                }),
+                window_id,
+            );
+        }
+        TouchEvent::Motion { id, x, y, .. } => {
+            let touch_point = match inner.touch_points.iter_mut().find(|p| p.id == id) {
+                Some(touch_point) => touch_point,
+                None => return,
+            };
+
+            touch_point.position = LogicalPosition::new(x, y);
+
+            let scale_factor = sctk::get_surface_scale_factor(&touch_point.surface) as f64;
+            let location = touch_point.position.to_physical(scale_factor);
+            let window_id = wayland::make_wid(&touch_point.surface);
+
+            event_sink.push_window_event(
+                WindowEvent::Touch(crate::event::Touch {
+                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                        DeviceId,
+                    )),
+                    phase: TouchPhase::Moved,
+                    location,
+                    force: None, // TODO
+                    id: id as u64,
+                }),
+                window_id,
+            );
+        }
+        TouchEvent::Frame => (),
+        TouchEvent::Cancel => {
+            for touch_point in inner.touch_points.drain(..) {
+                let scale_factor = sctk::get_surface_scale_factor(&touch_point.surface) as f64;
+                let location = touch_point.position.to_physical(scale_factor);
+                let window_id = wayland::make_wid(&touch_point.surface);
+
+                event_sink.push_window_event(
+                    WindowEvent::Touch(crate::event::Touch {
+                        device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
+                            DeviceId,
+                        )),
+                        phase: TouchPhase::Cancelled,
+                        location,
+                        force: None, // TODO
+                        id: touch_point.id as u64,
+                    }),
+                    window_id,
+                );
+            }
+        }
+        _ => (),
+    }
+}

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

@@ -0,0 +1,78 @@
+//! Touch handling.
+
+use sctk::reexports::client::protocol::wl_seat::WlSeat;
+use sctk::reexports::client::protocol::wl_surface::WlSurface;
+use sctk::reexports::client::protocol::wl_touch::WlTouch;
+use sctk::reexports::client::Attached;
+
+use crate::dpi::LogicalPosition;
+
+use crate::platform_impl::wayland::event_loop::WinitState;
+
+mod handlers;
+
+/// Wrapper around touch to handle release.
+pub struct Touch {
+    /// Proxy to touch.
+    touch: WlTouch,
+}
+
+impl Touch {
+    pub fn new(seat: &Attached<WlSeat>) -> Self {
+        let touch = seat.get_touch();
+        let mut inner = TouchInner::new();
+
+        touch.quick_assign(move |_, event, mut dispatch_data| {
+            let winit_state = dispatch_data.get::<WinitState>().unwrap();
+            handlers::handle_touch(event, &mut inner, winit_state);
+        });
+
+        Self {
+            touch: touch.detach(),
+        }
+    }
+}
+
+impl Drop for Touch {
+    fn drop(&mut self) {
+        if self.touch.as_ref().version() >= 3 {
+            self.touch.release();
+        }
+    }
+}
+
+/// The data used by touch handlers.
+pub(super) struct TouchInner {
+    /// Current touch points.
+    touch_points: Vec<TouchPoint>,
+}
+
+impl TouchInner {
+    fn new() -> Self {
+        Self {
+            touch_points: Vec::new(),
+        }
+    }
+}
+
+/// Location of touch press.
+pub(super) struct TouchPoint {
+    /// A surface where the touch point is located.
+    surface: WlSurface,
+
+    /// Location of the touch point.
+    position: LogicalPosition<f64>,
+
+    /// Id.
+    id: i32,
+}
+
+impl TouchPoint {
+    pub fn new(surface: WlSurface, position: LogicalPosition<f64>, id: i32) -> Self {
+        Self {
+            surface,
+            position,
+            id,
+        }
+    }
+}

src/platform_impl/linux/wayland/touch.rs

@@ -1,113 +0,0 @@
-use std::sync::{Arc, Mutex};
-
-use crate::event::{TouchPhase, WindowEvent};
-
-use super::{event_loop::EventsSink, window::WindowStore, DeviceId, WindowId};
-
-use smithay_client_toolkit::reexports::client::protocol::{
-    wl_seat,
-    wl_touch::{Event as TouchEvent, WlTouch},
-};
-
-struct TouchPoint {
-    wid: WindowId,
-    location: (f64, f64),
-    id: i32,
-}
-
-pub(crate) fn implement_touch(
-    seat: &wl_seat::WlSeat,
-    sink: EventsSink,
-    store: Arc<Mutex<WindowStore>>,
-) -> WlTouch {
-    let mut pending_ids = Vec::new();
-    seat.get_touch(|touch| {
-        touch.implement_closure(
-            move |evt, _| {
-                let store = store.lock().unwrap();
-                match evt {
-                    TouchEvent::Down {
-                        surface, id, x, y, ..
-                    } => {
-                        let wid = store.find_wid(&surface);
-                        if let Some(wid) = wid {
-                            sink.send_window_event(
-                                WindowEvent::Touch(crate::event::Touch {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                    phase: TouchPhase::Started,
-                                    location: (x, y).into(),
-                                    force: None, // TODO
-                                    id: id as u64,
-                                }),
-                                wid,
-                            );
-                            pending_ids.push(TouchPoint {
-                                wid,
-                                location: (x, y),
-                                id,
-                            });
-                        }
-                    }
-                    TouchEvent::Up { id, .. } => {
-                        let idx = pending_ids.iter().position(|p| p.id == id);
-                        if let Some(idx) = idx {
-                            let pt = pending_ids.remove(idx);
-                            sink.send_window_event(
-                                WindowEvent::Touch(crate::event::Touch {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                    phase: TouchPhase::Ended,
-                                    location: pt.location.into(),
-                                    force: None, // TODO
-                                    id: id as u64,
-                                }),
-                                pt.wid,
-                            );
-                        }
-                    }
-                    TouchEvent::Motion { id, x, y, .. } => {
-                        let pt = pending_ids.iter_mut().find(|p| p.id == id);
-                        if let Some(pt) = pt {
-                            pt.location = (x, y);
-                            sink.send_window_event(
-                                WindowEvent::Touch(crate::event::Touch {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                    phase: TouchPhase::Moved,
-                                    location: (x, y).into(),
-                                    force: None, // TODO
-                                    id: id as u64,
-                                }),
-                                pt.wid,
-                            );
-                        }
-                    }
-                    TouchEvent::Frame => (),
-                    TouchEvent::Cancel => {
-                        for pt in pending_ids.drain(..) {
-                            sink.send_window_event(
-                                WindowEvent::Touch(crate::event::Touch {
-                                    device_id: crate::event::DeviceId(
-                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
-                                    ),
-                                    phase: TouchPhase::Cancelled,
-                                    location: pt.location.into(),
-                                    force: None, // TODO
-                                    id: pt.id as u64,
-                                }),
-                                pt.wid,
-                            );
-                        }
-                    }
-                    _ => unreachable!(),
-                }
-            },
-            (),
-        )
-    })
-    .unwrap()
-}

src/platform_impl/linux/wayland/window.rs

@@ -1,520 +0,0 @@
-use raw_window_handle::unix::WaylandHandle;
-use std::{
-    collections::VecDeque,
-    mem::replace,
-    sync::{Arc, Mutex, Weak},
-};
-
-use crate::{
-    dpi::{LogicalSize, PhysicalPosition, PhysicalSize, Position, Size},
-    error::{ExternalError, NotSupportedError, OsError as RootOsError},
-    monitor::MonitorHandle as RootMonitorHandle,
-    platform_impl::{
-        platform::wayland::event_loop::{available_monitors, primary_monitor},
-        MonitorHandle as PlatformMonitorHandle,
-        PlatformSpecificWindowBuilderAttributes as PlAttributes,
-    },
-    window::{CursorIcon, Fullscreen, WindowAttributes},
-};
-
-use smithay_client_toolkit::{
-    output::OutputMgr,
-    reexports::client::{
-        protocol::{wl_seat, wl_surface},
-        Display,
-    },
-    surface::{get_dpi_factor, get_outputs},
-    window::{ConceptFrame, Event as WEvent, State as WState, Theme, Window as SWindow},
-};
-
-use super::{event_loop::CursorManager, make_wid, EventLoopWindowTarget, MonitorHandle, WindowId};
-
-pub struct Window {
-    surface: wl_surface::WlSurface,
-    frame: Arc<Mutex<SWindow<ConceptFrame>>>,
-    cursor_manager: Arc<Mutex<CursorManager>>,
-    outputs: OutputMgr, // Access to info for all monitors
-    size: Arc<Mutex<(u32, u32)>>,
-    kill_switch: (Arc<Mutex<bool>>, Arc<Mutex<bool>>),
-    display: Arc<Display>,
-    need_frame_refresh: Arc<Mutex<bool>>,
-    need_refresh: Arc<Mutex<bool>>,
-    fullscreen: Arc<Mutex<bool>>,
-    cursor_grab_changed: Arc<Mutex<Option<bool>>>, // Update grab state
-}
-
-impl Window {
-    pub fn new<T>(
-        evlp: &EventLoopWindowTarget<T>,
-        attributes: WindowAttributes,
-        pl_attribs: PlAttributes,
-    ) -> Result<Window, RootOsError> {
-        // Create the surface first to get initial DPI
-        let window_store = evlp.store.clone();
-        let cursor_manager = evlp.cursor_manager.clone();
-        let surface = evlp.env.create_surface(move |dpi, surface| {
-            window_store.lock().unwrap().dpi_change(&surface, dpi);
-            surface.set_buffer_scale(dpi);
-        });
-
-        let dpi = get_dpi_factor(&surface) as f64;
-        let (width, height) = attributes
-            .inner_size
-            .map(|size| size.to_logical::<f64>(dpi).into())
-            .unwrap_or((800, 600));
-
-        // Create the window
-        let size = Arc::new(Mutex::new((width, height)));
-        let fullscreen = Arc::new(Mutex::new(false));
-
-        let window_store = evlp.store.clone();
-
-        let my_surface = surface.clone();
-        let mut frame = SWindow::<ConceptFrame>::init_from_env(
-            &evlp.env,
-            surface.clone(),
-            (width, height),
-            move |event| match event {
-                WEvent::Configure { new_size, states } => {
-                    let mut store = window_store.lock().unwrap();
-                    let is_fullscreen = states.contains(&WState::Fullscreen);
-
-                    for window in &mut store.windows {
-                        if window.surface.as_ref().equals(&my_surface.as_ref()) {
-                            window.newsize = new_size;
-                            *(window.need_refresh.lock().unwrap()) = true;
-                            *(window.fullscreen.lock().unwrap()) = is_fullscreen;
-                            *(window.need_frame_refresh.lock().unwrap()) = true;
-                            return;
-                        }
-                    }
-                }
-                WEvent::Refresh => {
-                    let store = window_store.lock().unwrap();
-                    for window in &store.windows {
-                        if window.surface.as_ref().equals(&my_surface.as_ref()) {
-                            *(window.need_frame_refresh.lock().unwrap()) = true;
-                            return;
-                        }
-                    }
-                }
-                WEvent::Close => {
-                    let mut store = window_store.lock().unwrap();
-                    for window in &mut store.windows {
-                        if window.surface.as_ref().equals(&my_surface.as_ref()) {
-                            window.closed = true;
-                            return;
-                        }
-                    }
-                }
-            },
-        )
-        .unwrap();
-
-        if let Some(app_id) = pl_attribs.app_id {
-            frame.set_app_id(app_id);
-        }
-
-        for &(_, ref seat) in evlp.seats.lock().unwrap().iter() {
-            frame.new_seat(seat);
-        }
-
-        // Check for fullscreen requirements
-        match attributes.fullscreen {
-            Some(Fullscreen::Exclusive(_)) => {
-                panic!("Wayland doesn't support exclusive fullscreen")
-            }
-            Some(Fullscreen::Borderless(RootMonitorHandle {
-                inner: PlatformMonitorHandle::Wayland(ref monitor_id),
-            })) => frame.set_fullscreen(Some(&monitor_id.proxy)),
-            Some(Fullscreen::Borderless(_)) => unreachable!(),
-            None => {
-                if attributes.maximized {
-                    frame.set_maximized();
-                }
-            }
-        }
-
-        frame.set_resizable(attributes.resizable);
-
-        // set decorations
-        frame.set_decorate(attributes.decorations);
-
-        // set title
-        frame.set_title(attributes.title);
-
-        // min-max dimensions
-        frame.set_min_size(
-            attributes
-                .min_inner_size
-                .map(|size| size.to_logical::<f64>(dpi).into()),
-        );
-        frame.set_max_size(
-            attributes
-                .max_inner_size
-                .map(|size| size.to_logical::<f64>(dpi).into()),
-        );
-
-        let kill_switch = Arc::new(Mutex::new(false));
-        let need_frame_refresh = Arc::new(Mutex::new(true));
-        let frame = Arc::new(Mutex::new(frame));
-        let need_refresh = Arc::new(Mutex::new(true));
-        let cursor_grab_changed = Arc::new(Mutex::new(None));
-
-        evlp.store.lock().unwrap().windows.push(InternalWindow {
-            closed: false,
-            newsize: None,
-            size: size.clone(),
-            need_refresh: need_refresh.clone(),
-            fullscreen: fullscreen.clone(),
-            cursor_grab_changed: cursor_grab_changed.clone(),
-            need_frame_refresh: need_frame_refresh.clone(),
-            surface: surface.clone(),
-            kill_switch: kill_switch.clone(),
-            frame: Arc::downgrade(&frame),
-            current_dpi: 1,
-            new_dpi: None,
-        });
-        evlp.evq.borrow_mut().sync_roundtrip().unwrap();
-
-        Ok(Window {
-            display: evlp.display.clone(),
-            surface,
-            frame,
-            outputs: evlp.env.outputs.clone(),
-            size,
-            kill_switch: (kill_switch, evlp.cleanup_needed.clone()),
-            need_frame_refresh,
-            need_refresh,
-            cursor_manager,
-            fullscreen,
-            cursor_grab_changed,
-        })
-    }
-
-    #[inline]
-    pub fn id(&self) -> WindowId {
-        make_wid(&self.surface)
-    }
-
-    pub fn set_title(&self, title: &str) {
-        self.frame.lock().unwrap().set_title(title.into());
-    }
-
-    pub fn set_visible(&self, _visible: bool) {
-        // TODO
-    }
-
-    #[inline]
-    pub fn outer_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
-        Err(NotSupportedError::new())
-    }
-
-    #[inline]
-    pub fn inner_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
-        Err(NotSupportedError::new())
-    }
-
-    #[inline]
-    pub fn set_outer_position(&self, _pos: Position) {
-        // Not possible with wayland
-    }
-
-    pub fn inner_size(&self) -> PhysicalSize<u32> {
-        let dpi = self.scale_factor() as f64;
-        let size = LogicalSize::<f64>::from(*self.size.lock().unwrap());
-        size.to_physical(dpi)
-    }
-
-    pub fn request_redraw(&self) {
-        *self.need_refresh.lock().unwrap() = true;
-    }
-
-    #[inline]
-    pub fn outer_size(&self) -> PhysicalSize<u32> {
-        let dpi = self.scale_factor() as f64;
-        let (w, h) = self.size.lock().unwrap().clone();
-        // let (w, h) = super::wayland_window::add_borders(w as i32, h as i32);
-        let size = LogicalSize::<f64>::from((w, h));
-        size.to_physical(dpi)
-    }
-
-    #[inline]
-    // NOTE: This will only resize the borders, the contents must be updated by the user
-    pub fn set_inner_size(&self, size: Size) {
-        let dpi = self.scale_factor() as f64;
-        let (w, h) = size.to_logical::<u32>(dpi).into();
-        self.frame.lock().unwrap().resize(w, h);
-        *(self.size.lock().unwrap()) = (w, h);
-    }
-
-    #[inline]
-    pub fn set_min_inner_size(&self, dimensions: Option<Size>) {
-        let dpi = self.scale_factor() as f64;
-        self.frame
-            .lock()
-            .unwrap()
-            .set_min_size(dimensions.map(|dim| dim.to_logical::<f64>(dpi).into()));
-    }
-
-    #[inline]
-    pub fn set_max_inner_size(&self, dimensions: Option<Size>) {
-        let dpi = self.scale_factor() as f64;
-        self.frame
-            .lock()
-            .unwrap()
-            .set_max_size(dimensions.map(|dim| dim.to_logical::<f64>(dpi).into()));
-    }
-
-    #[inline]
-    pub fn set_resizable(&self, resizable: bool) {
-        self.frame.lock().unwrap().set_resizable(resizable);
-    }
-
-    #[inline]
-    pub fn scale_factor(&self) -> i32 {
-        get_dpi_factor(&self.surface)
-    }
-
-    pub fn set_decorations(&self, decorate: bool) {
-        self.frame.lock().unwrap().set_decorate(decorate);
-        *(self.need_frame_refresh.lock().unwrap()) = true;
-    }
-
-    pub fn set_minimized(&self, minimized: bool) {
-        // An app cannot un-minimize itself on Wayland
-        if minimized {
-            self.frame.lock().unwrap().set_minimized();
-        }
-    }
-
-    pub fn set_maximized(&self, maximized: bool) {
-        if maximized {
-            self.frame.lock().unwrap().set_maximized();
-        } else {
-            self.frame.lock().unwrap().unset_maximized();
-        }
-    }
-
-    pub fn fullscreen(&self) -> Option<Fullscreen> {
-        if *(self.fullscreen.lock().unwrap()) {
-            Some(Fullscreen::Borderless(RootMonitorHandle {
-                inner: PlatformMonitorHandle::Wayland(self.current_monitor()),
-            }))
-        } else {
-            None
-        }
-    }
-
-    pub fn set_fullscreen(&self, fullscreen: Option<Fullscreen>) {
-        match fullscreen {
-            Some(Fullscreen::Exclusive(_)) => {
-                panic!("Wayland doesn't support exclusive fullscreen")
-            }
-            Some(Fullscreen::Borderless(RootMonitorHandle {
-                inner: PlatformMonitorHandle::Wayland(ref monitor_id),
-            })) => {
-                self.frame
-                    .lock()
-                    .unwrap()
-                    .set_fullscreen(Some(&monitor_id.proxy));
-            }
-            Some(Fullscreen::Borderless(_)) => unreachable!(),
-            None => self.frame.lock().unwrap().unset_fullscreen(),
-        }
-    }
-
-    pub fn set_theme<T: Theme>(&self, theme: T) {
-        self.frame.lock().unwrap().set_theme(theme)
-    }
-
-    #[inline]
-    pub fn set_cursor_icon(&self, cursor: CursorIcon) {
-        let mut cursor_manager = self.cursor_manager.lock().unwrap();
-        cursor_manager.set_cursor_icon(cursor);
-    }
-
-    #[inline]
-    pub fn set_cursor_visible(&self, visible: bool) {
-        let mut cursor_manager = self.cursor_manager.lock().unwrap();
-        cursor_manager.set_cursor_visible(visible);
-    }
-
-    #[inline]
-    pub fn set_cursor_grab(&self, grab: bool) -> Result<(), ExternalError> {
-        *self.cursor_grab_changed.lock().unwrap() = Some(grab);
-        Ok(())
-    }
-
-    #[inline]
-    pub fn set_cursor_position(&self, _pos: Position) -> Result<(), ExternalError> {
-        Err(ExternalError::NotSupported(NotSupportedError::new()))
-    }
-
-    pub fn display(&self) -> &Display {
-        &*self.display
-    }
-
-    pub fn surface(&self) -> &wl_surface::WlSurface {
-        &self.surface
-    }
-
-    pub fn current_monitor(&self) -> MonitorHandle {
-        let output = get_outputs(&self.surface).last().unwrap().clone();
-        MonitorHandle {
-            proxy: output,
-            mgr: self.outputs.clone(),
-        }
-    }
-
-    pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
-        available_monitors(&self.outputs)
-    }
-
-    pub fn primary_monitor(&self) -> MonitorHandle {
-        primary_monitor(&self.outputs)
-    }
-
-    pub fn raw_window_handle(&self) -> WaylandHandle {
-        WaylandHandle {
-            surface: self.surface().as_ref().c_ptr() as *mut _,
-            display: self.display().as_ref().c_ptr() as *mut _,
-            ..WaylandHandle::empty()
-        }
-    }
-}
-
-impl Drop for Window {
-    fn drop(&mut self) {
-        *(self.kill_switch.0.lock().unwrap()) = true;
-        *(self.kill_switch.1.lock().unwrap()) = true;
-    }
-}
-
-/*
- * Internal store for windows
- */
-
-struct InternalWindow {
-    surface: wl_surface::WlSurface,
-    // TODO: CONVERT TO LogicalSize<u32>s
-    newsize: Option<(u32, u32)>,
-    size: Arc<Mutex<(u32, u32)>>,
-    need_refresh: Arc<Mutex<bool>>,
-    fullscreen: Arc<Mutex<bool>>,
-    need_frame_refresh: Arc<Mutex<bool>>,
-    cursor_grab_changed: Arc<Mutex<Option<bool>>>,
-    closed: bool,
-    kill_switch: Arc<Mutex<bool>>,
-    frame: Weak<Mutex<SWindow<ConceptFrame>>>,
-    current_dpi: i32,
-    new_dpi: Option<i32>,
-}
-
-pub struct WindowStore {
-    windows: Vec<InternalWindow>,
-}
-
-pub struct WindowStoreForEach<'a> {
-    pub newsize: Option<(u32, u32)>,
-    pub size: &'a mut (u32, u32),
-    pub prev_dpi: i32,
-    pub new_dpi: Option<i32>,
-    pub closed: bool,
-    pub grab_cursor: Option<bool>,
-    pub surface: &'a wl_surface::WlSurface,
-    pub wid: WindowId,
-    pub frame: Option<&'a mut SWindow<ConceptFrame>>,
-}
-
-impl WindowStore {
-    pub fn new() -> WindowStore {
-        WindowStore {
-            windows: Vec::new(),
-        }
-    }
-
-    pub fn find_wid(&self, surface: &wl_surface::WlSurface) -> Option<WindowId> {
-        for window in &self.windows {
-            if surface.as_ref().equals(&window.surface.as_ref()) {
-                return Some(make_wid(surface));
-            }
-        }
-        None
-    }
-
-    pub fn cleanup(&mut self) -> Vec<WindowId> {
-        let mut pruned = Vec::new();
-        self.windows.retain(|w| {
-            if *w.kill_switch.lock().unwrap() {
-                // window is dead, cleanup
-                pruned.push(make_wid(&w.surface));
-                w.surface.destroy();
-                false
-            } else {
-                true
-            }
-        });
-        pruned
-    }
-
-    pub fn new_seat(&self, seat: &wl_seat::WlSeat) {
-        for window in &self.windows {
-            if let Some(w) = window.frame.upgrade() {
-                w.lock().unwrap().new_seat(seat);
-            }
-        }
-    }
-
-    fn dpi_change(&mut self, surface: &wl_surface::WlSurface, new: i32) {
-        for window in &mut self.windows {
-            if surface.as_ref().equals(&window.surface.as_ref()) {
-                window.new_dpi = Some(new);
-            }
-        }
-    }
-
-    pub fn for_each<F>(&mut self, mut f: F)
-    where
-        F: FnMut(WindowStoreForEach<'_>),
-    {
-        for window in &mut self.windows {
-            let opt_arc = window.frame.upgrade();
-            let mut opt_mutex_lock = opt_arc.as_ref().map(|m| m.lock().unwrap());
-            let mut size = { *window.size.lock().unwrap() };
-            f(WindowStoreForEach {
-                newsize: window.newsize.take(),
-                size: &mut size,
-                prev_dpi: window.current_dpi,
-                new_dpi: window.new_dpi,
-                closed: window.closed,
-                grab_cursor: window.cursor_grab_changed.lock().unwrap().take(),
-                surface: &window.surface,
-                wid: make_wid(&window.surface),
-                frame: opt_mutex_lock.as_mut().map(|m| &mut **m),
-            });
-            *window.size.lock().unwrap() = size;
-            if let Some(dpi) = window.new_dpi.take() {
-                window.current_dpi = dpi;
-            }
-            // avoid re-spamming the event
-            window.closed = false;
-        }
-    }
-
-    pub fn for_each_redraw_trigger<F>(&mut self, mut f: F)
-    where
-        F: FnMut(bool, bool, WindowId, Option<&mut SWindow<ConceptFrame>>),
-    {
-        for window in &mut self.windows {
-            let opt_arc = window.frame.upgrade();
-            let mut opt_mutex_lock = opt_arc.as_ref().map(|m| m.lock().unwrap());
-            f(
-                replace(&mut *window.need_refresh.lock().unwrap(), false),
-                replace(&mut *window.need_frame_refresh.lock().unwrap(), false),
-                make_wid(&window.surface),
-                opt_mutex_lock.as_mut().map(|m| &mut **m),
-            );
-        }
-    }
-}

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

@@ -0,0 +1,656 @@
+use std::collections::VecDeque;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::{Arc, Mutex};
+
+use sctk::reexports::client::protocol::wl_surface::WlSurface;
+use sctk::reexports::client::Display;
+
+use sctk::reexports::calloop;
+
+use sctk::window::{
+    ARGBColor, ButtonColorSpec, ColorSpec, ConceptConfig, ConceptFrame, Decorations,
+};
+
+use raw_window_handle::unix::WaylandHandle;
+
+use crate::dpi::{LogicalSize, PhysicalPosition, PhysicalSize, Position, Size};
+use crate::error::{ExternalError, NotSupportedError, OsError as RootOsError};
+use crate::monitor::MonitorHandle as RootMonitorHandle;
+use crate::platform::unix::{ARGBColor as LocalARGBColor, Button, ButtonState, Element, Theme};
+use crate::platform_impl::{
+    MonitorHandle as PlatformMonitorHandle, OsError,
+    PlatformSpecificWindowBuilderAttributes as PlatformAttributes,
+};
+use crate::window::{CursorIcon, Fullscreen, WindowAttributes};
+
+use super::env::WindowingFeatures;
+use super::event_loop::WinitState;
+use super::output::{MonitorHandle, OutputManagerHandle};
+use super::{EventLoopWindowTarget, WindowId};
+
+pub mod shim;
+
+use shim::{WindowHandle, WindowRequest, WindowUpdate};
+
+pub struct Window {
+    /// Window id.
+    window_id: WindowId,
+
+    /// The Wayland display.
+    display: Display,
+
+    /// The underlying wl_surface.
+    surface: WlSurface,
+
+    /// The current window size.
+    size: Arc<Mutex<LogicalSize<u32>>>,
+
+    /// A handle to output manager.
+    output_manager_handle: OutputManagerHandle,
+
+    /// Event loop proxy to wake it up.
+    event_loop_awakener: calloop::ping::Ping,
+
+    /// Fullscreen state.
+    fullscreen: Arc<AtomicBool>,
+
+    /// Available windowing features.
+    windowing_features: WindowingFeatures,
+
+    /// Requests that SCTK window should perform.
+    window_requests: Arc<Mutex<Vec<WindowRequest>>>,
+}
+
+impl Window {
+    pub fn new<T>(
+        event_loop_window_target: &EventLoopWindowTarget<T>,
+        attributes: WindowAttributes,
+        platform_attributes: PlatformAttributes,
+    ) -> Result<Self, RootOsError> {
+        let surface = event_loop_window_target
+            .env
+            .create_surface_with_scale_callback(move |scale, surface, mut dispatch_data| {
+                let winit_state = dispatch_data.get::<WinitState>().unwrap();
+
+                // Get the window that receiced the event.
+                let window_id = super::make_wid(&surface);
+                let mut window_update = winit_state.window_updates.get_mut(&window_id).unwrap();
+
+                // Set pending scale factor.
+                window_update.scale_factor = Some(scale);
+                window_update.redraw_requested = true;
+
+                surface.set_buffer_scale(scale);
+            })
+            .detach();
+
+        let scale_factor = sctk::get_surface_scale_factor(&surface);
+
+        let window_id = super::make_wid(&surface);
+        let fullscreen = Arc::new(AtomicBool::new(false));
+        let fullscreen_clone = fullscreen.clone();
+
+        let (width, height) = attributes
+            .inner_size
+            .map(|size| size.to_logical::<f64>(scale_factor as f64).into())
+            .unwrap_or((800, 600));
+
+        let theme_manager = event_loop_window_target.theme_manager.clone();
+        let mut window = event_loop_window_target
+            .env
+            .create_window::<ConceptFrame, _>(
+                surface.clone(),
+                Some(theme_manager),
+                (width, height),
+                move |event, mut dispatch_data| {
+                    use sctk::window::{Event, State};
+
+                    let winit_state = dispatch_data.get::<WinitState>().unwrap();
+                    let mut window_update = winit_state.window_updates.get_mut(&window_id).unwrap();
+
+                    match event {
+                        Event::Refresh => {
+                            window_update.refresh_frame = true;
+                        }
+                        Event::Configure { new_size, states } => {
+                            let is_fullscreen = states.contains(&State::Fullscreen);
+                            fullscreen_clone.store(is_fullscreen, Ordering::Relaxed);
+
+                            window_update.refresh_frame = true;
+                            window_update.redraw_requested = true;
+                            if let Some((w, h)) = new_size {
+                                window_update.size = Some(LogicalSize::new(w, h));
+                            }
+                        }
+                        Event::Close => {
+                            window_update.close_window = true;
+                        }
+                    }
+                },
+            )
+            .map_err(|_| os_error!(OsError::WaylandMisc("failed to create window.")))?;
+
+        // Set decorations.
+        if attributes.decorations {
+            window.set_decorate(Decorations::FollowServer);
+        } else {
+            window.set_decorate(Decorations::None);
+        }
+
+        // Min dimensions.
+        let min_size = attributes
+            .min_inner_size
+            .map(|size| size.to_logical::<f64>(scale_factor as f64).into());
+        window.set_min_size(min_size);
+
+        // Max dimensions.
+        let max_size = attributes
+            .max_inner_size
+            .map(|size| size.to_logical::<f64>(scale_factor as f64).into());
+        window.set_max_size(max_size);
+
+        // Set Wayland specific window attributes.
+        if let Some(app_id) = platform_attributes.app_id {
+            window.set_app_id(app_id);
+        }
+
+        // Set common window attributes.
+        //
+        // We set resizable after other attributes, since it touches min and max size under
+        // the hood.
+        window.set_resizable(attributes.resizable);
+        window.set_title(attributes.title);
+
+        // Set fullscreen/maximized if so was requested.
+        match attributes.fullscreen {
+            Some(Fullscreen::Exclusive(_)) => {
+                warn!("`Fullscreen::Exclusive` is ignored on Wayland")
+            }
+            Some(Fullscreen::Borderless(monitor)) => {
+                let monitor =
+                    monitor.and_then(|RootMonitorHandle { inner: monitor }| match monitor {
+                        PlatformMonitorHandle::Wayland(monitor) => Some(monitor.proxy),
+                        #[cfg(feature = "x11")]
+                        PlatformMonitorHandle::X(_) => None,
+                    });
+
+                window.set_fullscreen(monitor.as_ref());
+            }
+            None => {
+                if attributes.maximized {
+                    window.set_maximized();
+                }
+            }
+        }
+
+        let size = Arc::new(Mutex::new(LogicalSize::new(width, height)));
+
+        // We should trigger redraw and commit the surface for the newly created window.
+        let mut window_update = WindowUpdate::new();
+        window_update.refresh_frame = true;
+        window_update.redraw_requested = true;
+
+        let window_id = super::make_wid(&surface);
+        let window_requests = Arc::new(Mutex::new(Vec::with_capacity(64)));
+
+        // Create a handle that performs all the requests on underlying sctk a window.
+        let window_handle = WindowHandle::new(window, size.clone(), window_requests.clone());
+
+        let mut winit_state = event_loop_window_target.state.borrow_mut();
+
+        winit_state.window_map.insert(window_id, window_handle);
+
+        winit_state
+            .window_updates
+            .insert(window_id, WindowUpdate::new());
+
+        let windowing_features = event_loop_window_target.windowing_features;
+
+        // Send all updates to the server.
+        let wayland_source = &event_loop_window_target.wayland_source;
+        let event_loop_handle = &event_loop_window_target.event_loop_handle;
+
+        // To make our window usable for drawing right away we must `ack` a `configure`
+        // from the server, the acking part here is done by SCTK window frame, so we just
+        // need to sync with server so it'll be done automatically for us.
+        event_loop_handle.with_source(&wayland_source, |event_queue| {
+            let event_queue = event_queue.queue();
+            let _ = event_queue.sync_roundtrip(&mut *winit_state, |_, _, _| unreachable!());
+        });
+
+        // We all praise GNOME for these 3 lines of pure magic. If we don't do that,
+        // GNOME will shrink our window a bit for the size of the decorations. I guess it
+        // happens because we haven't committed them with buffers to the server.
+        let window_handle = winit_state.window_map.get_mut(&window_id).unwrap();
+        window_handle.window.refresh();
+
+        let output_manager_handle = event_loop_window_target.output_manager.handle();
+
+        let window = Self {
+            window_id,
+            surface,
+            display: event_loop_window_target.display.clone(),
+            output_manager_handle,
+            size,
+            window_requests,
+            event_loop_awakener: event_loop_window_target.event_loop_awakener.clone(),
+            fullscreen,
+            windowing_features,
+        };
+
+        Ok(window)
+    }
+}
+
+impl Window {
+    #[inline]
+    pub fn id(&self) -> WindowId {
+        self.window_id
+    }
+
+    #[inline]
+    pub fn set_title(&self, title: &str) {
+        let title_request = WindowRequest::Title(title.to_owned());
+        self.window_requests.lock().unwrap().push(title_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_visible(&self, _visible: bool) {
+        // Not possible on Wayland.
+    }
+
+    #[inline]
+    pub fn outer_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
+        Err(NotSupportedError::new())
+    }
+
+    #[inline]
+    pub fn inner_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
+        Err(NotSupportedError::new())
+    }
+
+    #[inline]
+    pub fn set_outer_position(&self, _: Position) {
+        // Not possible on Wayland.
+    }
+
+    pub fn inner_size(&self) -> PhysicalSize<u32> {
+        self.size
+            .lock()
+            .unwrap()
+            .to_physical(self.scale_factor() as f64)
+    }
+
+    #[inline]
+    pub fn request_redraw(&self) {
+        let redraw_request = WindowRequest::Redraw;
+        self.window_requests.lock().unwrap().push(redraw_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn outer_size(&self) -> PhysicalSize<u32> {
+        self.size
+            .lock()
+            .unwrap()
+            .to_physical(self.scale_factor() as f64)
+    }
+
+    #[inline]
+    pub fn set_inner_size(&self, size: Size) {
+        let scale_factor = self.scale_factor() as f64;
+
+        let size = size.to_logical::<u32>(scale_factor);
+        *self.size.lock().unwrap() = size;
+
+        let frame_size_request = WindowRequest::FrameSize(size);
+        self.window_requests
+            .lock()
+            .unwrap()
+            .push(frame_size_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_min_inner_size(&self, dimensions: Option<Size>) {
+        let scale_factor = self.scale_factor() as f64;
+        let size = dimensions.map(|size| size.to_logical::<u32>(scale_factor));
+
+        let min_size_request = WindowRequest::MinSize(size);
+        self.window_requests.lock().unwrap().push(min_size_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_max_inner_size(&self, dimensions: Option<Size>) {
+        let scale_factor = self.scale_factor() as f64;
+        let size = dimensions.map(|size| size.to_logical::<u32>(scale_factor));
+
+        let max_size_request = WindowRequest::MaxSize(size);
+        self.window_requests.lock().unwrap().push(max_size_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_resizable(&self, resizable: bool) {
+        let resizeable_request = WindowRequest::Resizeable(resizable);
+        self.window_requests
+            .lock()
+            .unwrap()
+            .push(resizeable_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn scale_factor(&self) -> u32 {
+        // The scale factor from `get_surface_scale_factor` is always greater than zero, so
+        // u32 conversion is safe.
+        sctk::get_surface_scale_factor(&self.surface) as u32
+    }
+
+    #[inline]
+    pub fn set_decorations(&self, decorate: bool) {
+        let decorate_request = WindowRequest::Decorate(decorate);
+        self.window_requests.lock().unwrap().push(decorate_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_minimized(&self, minimized: bool) {
+        // You can't unminimize the window on Wayland.
+        if !minimized {
+            return;
+        }
+
+        let minimize_request = WindowRequest::Minimize;
+        self.window_requests.lock().unwrap().push(minimize_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_maximized(&self, maximized: bool) {
+        let maximize_request = WindowRequest::Maximize(maximized);
+        self.window_requests.lock().unwrap().push(maximize_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn fullscreen(&self) -> Option<Fullscreen> {
+        if self.fullscreen.load(Ordering::Relaxed) {
+            let current_monitor = self.current_monitor().map(|monitor| RootMonitorHandle {
+                inner: PlatformMonitorHandle::Wayland(monitor),
+            });
+
+            Some(Fullscreen::Borderless(current_monitor))
+        } else {
+            None
+        }
+    }
+
+    #[inline]
+    pub fn set_fullscreen(&self, fullscreen: Option<Fullscreen>) {
+        let fullscreen_request = match fullscreen {
+            Some(Fullscreen::Exclusive(_)) => {
+                warn!("`Fullscreen::Exclusive` is ignored on Wayland");
+                return;
+            }
+            Some(Fullscreen::Borderless(monitor)) => {
+                let monitor =
+                    monitor.and_then(|RootMonitorHandle { inner: monitor }| match monitor {
+                        PlatformMonitorHandle::Wayland(monitor) => Some(monitor.proxy),
+                        #[cfg(feature = "x11")]
+                        PlatformMonitorHandle::X(_) => None,
+                    });
+
+                WindowRequest::Fullscreen(monitor)
+            }
+            None => WindowRequest::UnsetFullscreen,
+        };
+
+        self.window_requests
+            .lock()
+            .unwrap()
+            .push(fullscreen_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_theme<T: Theme>(&self, theme: T) {
+        // First buttons is minimize, then maximize, and then close.
+        let buttons: Vec<(ButtonColorSpec, ButtonColorSpec)> =
+            [Button::Minimize, Button::Maximize, Button::Close]
+                .iter()
+                .map(|button| {
+                    let button = *button;
+                    let idle_active_bg = theme
+                        .button_color(button, ButtonState::Idle, false, true)
+                        .into();
+                    let idle_inactive_bg = theme
+                        .button_color(button, ButtonState::Idle, false, false)
+                        .into();
+                    let idle_active_icon = theme
+                        .button_color(button, ButtonState::Idle, true, true)
+                        .into();
+                    let idle_inactive_icon = theme
+                        .button_color(button, ButtonState::Idle, true, false)
+                        .into();
+                    let idle_bg = ColorSpec {
+                        active: idle_active_bg,
+                        inactive: idle_inactive_bg,
+                    };
+                    let idle_icon = ColorSpec {
+                        active: idle_active_icon,
+                        inactive: idle_inactive_icon,
+                    };
+
+                    let hovered_active_bg = theme
+                        .button_color(button, ButtonState::Hovered, false, true)
+                        .into();
+                    let hovered_inactive_bg = theme
+                        .button_color(button, ButtonState::Hovered, false, false)
+                        .into();
+                    let hovered_active_icon = theme
+                        .button_color(button, ButtonState::Hovered, true, true)
+                        .into();
+                    let hovered_inactive_icon = theme
+                        .button_color(button, ButtonState::Hovered, true, false)
+                        .into();
+                    let hovered_bg = ColorSpec {
+                        active: hovered_active_bg,
+                        inactive: hovered_inactive_bg,
+                    };
+                    let hovered_icon = ColorSpec {
+                        active: hovered_active_icon,
+                        inactive: hovered_inactive_icon,
+                    };
+
+                    let disabled_active_bg = theme
+                        .button_color(button, ButtonState::Disabled, false, true)
+                        .into();
+                    let disabled_inactive_bg = theme
+                        .button_color(button, ButtonState::Disabled, false, false)
+                        .into();
+                    let disabled_active_icon = theme
+                        .button_color(button, ButtonState::Disabled, true, true)
+                        .into();
+                    let disabled_inactive_icon = theme
+                        .button_color(button, ButtonState::Disabled, true, false)
+                        .into();
+                    let disabled_bg = ColorSpec {
+                        active: disabled_active_bg,
+                        inactive: disabled_inactive_bg,
+                    };
+                    let disabled_icon = ColorSpec {
+                        active: disabled_active_icon,
+                        inactive: disabled_inactive_icon,
+                    };
+
+                    let button_bg = ButtonColorSpec {
+                        idle: idle_bg,
+                        hovered: hovered_bg,
+                        disabled: disabled_bg,
+                    };
+                    let button_icon = ButtonColorSpec {
+                        idle: idle_icon,
+                        hovered: hovered_icon,
+                        disabled: disabled_icon,
+                    };
+
+                    (button_icon, button_bg)
+                })
+                .collect();
+
+        let minimize_button = Some(buttons[0]);
+        let maximize_button = Some(buttons[1]);
+        let close_button = Some(buttons[2]);
+
+        // The first color is bar, then separator, and then text color.
+        let titlebar_colors: Vec<ColorSpec> = [Element::Bar, Element::Separator, Element::Text]
+            .iter()
+            .map(|element| {
+                let element = *element;
+                let active = theme.element_color(element, true).into();
+                let inactive = theme.element_color(element, false).into();
+
+                ColorSpec { active, inactive }
+            })
+            .collect();
+
+        let primary_color = titlebar_colors[0];
+        let secondary_color = titlebar_colors[1];
+        let title_color = titlebar_colors[2];
+
+        let title_font = theme.font();
+
+        let concept_config = ConceptConfig {
+            primary_color,
+            secondary_color,
+            title_color,
+            title_font,
+            minimize_button,
+            maximize_button,
+            close_button,
+        };
+
+        let theme_request = WindowRequest::Theme(concept_config);
+        self.window_requests.lock().unwrap().push(theme_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_cursor_icon(&self, cursor: CursorIcon) {
+        let cursor_icon_request = WindowRequest::NewCursorIcon(cursor);
+        self.window_requests
+            .lock()
+            .unwrap()
+            .push(cursor_icon_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_cursor_visible(&self, visible: bool) {
+        let cursor_visible_request = WindowRequest::ShowCursor(visible);
+        self.window_requests
+            .lock()
+            .unwrap()
+            .push(cursor_visible_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn set_cursor_grab(&self, grab: bool) -> Result<(), ExternalError> {
+        if !self.windowing_features.cursor_grab() {
+            return Err(ExternalError::NotSupported(NotSupportedError::new()));
+        }
+
+        let cursor_grab_request = WindowRequest::GrabCursor(grab);
+        self.window_requests
+            .lock()
+            .unwrap()
+            .push(cursor_grab_request);
+        self.event_loop_awakener.ping();
+
+        Ok(())
+    }
+
+    #[inline]
+    pub fn set_cursor_position(&self, _: Position) -> Result<(), ExternalError> {
+        // XXX This is possible if the locked pointer is being used. We don't have any
+        // API for that right now, but it could be added in
+        // https://github.com/rust-windowing/winit/issues/1677.
+        //
+        // This function is essential for the locked pointer API.
+        //
+        // See pointer-constraints-unstable-v1.xml.
+        Err(ExternalError::NotSupported(NotSupportedError::new()))
+    }
+
+    #[inline]
+    pub fn set_ime_position(&self, position: Position) {
+        let scale_factor = self.scale_factor() as f64;
+        let position = position.to_logical(scale_factor);
+        let ime_position_request = WindowRequest::IMEPosition(position);
+        self.window_requests
+            .lock()
+            .unwrap()
+            .push(ime_position_request);
+        self.event_loop_awakener.ping();
+    }
+
+    #[inline]
+    pub fn display(&self) -> &Display {
+        &self.display
+    }
+
+    #[inline]
+    pub fn surface(&self) -> &WlSurface {
+        &self.surface
+    }
+
+    #[inline]
+    pub fn current_monitor(&self) -> Option<MonitorHandle> {
+        let output = sctk::get_surface_outputs(&self.surface).last()?.clone();
+        Some(MonitorHandle::new(output))
+    }
+
+    #[inline]
+    pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
+        self.output_manager_handle.available_outputs()
+    }
+
+    #[inline]
+    pub fn primary_monitor(&self) -> Option<RootMonitorHandle> {
+        None
+    }
+
+    #[inline]
+    pub fn raw_window_handle(&self) -> WaylandHandle {
+        let display = self.display.get_display_ptr() as *mut _;
+        let surface = self.surface.as_ref().c_ptr() as *mut _;
+
+        WaylandHandle {
+            display,
+            surface,
+            ..WaylandHandle::empty()
+        }
+    }
+}
+
+impl From<LocalARGBColor> for ARGBColor {
+    fn from(color: LocalARGBColor) -> Self {
+        let a = color.a;
+        let r = color.r;
+        let g = color.g;
+        let b = color.b;
+        Self { a, r, g, b }
+    }
+}
+
+impl Drop for Window {
+    fn drop(&mut self) {
+        let close_request = WindowRequest::Close;
+        self.window_requests.lock().unwrap().push(close_request);
+        self.event_loop_awakener.ping();
+    }
+}

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

@@ -0,0 +1,388 @@
+use std::cell::Cell;
+use std::sync::{Arc, Mutex};
+
+use sctk::reexports::client::protocol::wl_output::WlOutput;
+
+use sctk::window::{ConceptConfig, ConceptFrame, Decorations, Window};
+
+use crate::dpi::{LogicalPosition, LogicalSize};
+
+use crate::event::WindowEvent;
+use crate::platform_impl::wayland::event_loop::WinitState;
+use crate::platform_impl::wayland::seat::pointer::WinitPointer;
+use crate::platform_impl::wayland::seat::text_input::TextInputHandler;
+use crate::platform_impl::wayland::WindowId;
+use crate::window::CursorIcon;
+
+/// A request to SCTK window from Winit window.
+#[derive(Debug, Clone)]
+pub enum WindowRequest {
+    /// Set fullscreen.
+    ///
+    /// Passing `None` will set it on the current monitor.
+    Fullscreen(Option<WlOutput>),
+
+    /// Unset fullscreen.
+    UnsetFullscreen,
+
+    /// Show cursor for the certain window or not.
+    ShowCursor(bool),
+
+    /// Change the cursor icon.
+    NewCursorIcon(CursorIcon),
+
+    /// Grab cursor.
+    GrabCursor(bool),
+
+    /// Maximize the window.
+    Maximize(bool),
+
+    /// Minimize the window.
+    Minimize,
+
+    /// Request decorations change.
+    Decorate(bool),
+
+    /// Make the window resizeable.
+    Resizeable(bool),
+
+    /// Set the title for window.
+    Title(String),
+
+    /// Min size.
+    MinSize(Option<LogicalSize<u32>>),
+
+    /// Max size.
+    MaxSize(Option<LogicalSize<u32>>),
+
+    /// New frame size.
+    FrameSize(LogicalSize<u32>),
+
+    /// Set IME window position.
+    IMEPosition(LogicalPosition<u32>),
+
+    /// Redraw was requested.
+    Redraw,
+
+    /// A new theme for a concept frame was requested.
+    Theme(ConceptConfig),
+
+    /// Window should be closed.
+    Close,
+}
+
+/// Pending update to a window from SCTK window.
+#[derive(Debug, Clone, Copy)]
+pub struct WindowUpdate {
+    /// New window size.
+    pub size: Option<LogicalSize<u32>>,
+
+    /// New scale factor.
+    pub scale_factor: Option<i32>,
+
+    /// Whether `redraw` was requested.
+    pub redraw_requested: bool,
+
+    /// Wether the frame should be refreshed.
+    pub refresh_frame: bool,
+
+    /// Close the window.
+    pub close_window: bool,
+}
+
+impl WindowUpdate {
+    pub fn new() -> Self {
+        Self {
+            size: None,
+            scale_factor: None,
+            redraw_requested: false,
+            refresh_frame: false,
+            close_window: false,
+        }
+    }
+
+    pub fn take(&mut self) -> Self {
+        let size = self.size.take();
+        let scale_factor = self.scale_factor.take();
+
+        let redraw_requested = self.redraw_requested;
+        self.redraw_requested = false;
+
+        let refresh_frame = self.refresh_frame;
+        self.refresh_frame = false;
+
+        let close_window = self.close_window;
+        self.close_window = false;
+
+        Self {
+            size,
+            scale_factor,
+            redraw_requested,
+            refresh_frame,
+            close_window,
+        }
+    }
+}
+
+/// A handle to perform operations on SCTK window
+/// and react to events.
+pub struct WindowHandle {
+    /// An actual window.
+    pub window: Window<ConceptFrame>,
+
+    /// The current size of the window.
+    pub size: Arc<Mutex<LogicalSize<u32>>>,
+
+    /// A pending requests to SCTK window.
+    pub pending_window_requests: Arc<Mutex<Vec<WindowRequest>>>,
+
+    /// Current cursor icon.
+    pub cursor_icon: Cell<CursorIcon>,
+
+    /// Visible cursor or not.
+    cursor_visible: Cell<bool>,
+
+    /// Cursor confined to the surface.
+    confined: Cell<bool>,
+
+    /// Pointers over the current surface.
+    pointers: Vec<WinitPointer>,
+
+    /// Text inputs on the current surface.
+    text_inputs: Vec<TextInputHandler>,
+}
+
+impl WindowHandle {
+    pub fn new(
+        window: Window<ConceptFrame>,
+        size: Arc<Mutex<LogicalSize<u32>>>,
+        pending_window_requests: Arc<Mutex<Vec<WindowRequest>>>,
+    ) -> Self {
+        Self {
+            window,
+            size,
+            pending_window_requests,
+            cursor_icon: Cell::new(CursorIcon::Default),
+            confined: Cell::new(false),
+            cursor_visible: Cell::new(true),
+            pointers: Vec::new(),
+            text_inputs: Vec::new(),
+        }
+    }
+
+    pub fn set_cursor_grab(&self, grab: bool) {
+        // The new requested state matches the current confine status, return.
+        if self.confined.get() == grab {
+            return;
+        }
+
+        self.confined.replace(grab);
+
+        for pointer in self.pointers.iter() {
+            if self.confined.get() {
+                let surface = self.window.surface();
+                pointer.confine(&surface);
+            } else {
+                pointer.unconfine();
+            }
+        }
+    }
+
+    /// Pointer appeared over the window.
+    pub fn pointer_entered(&mut self, pointer: WinitPointer) {
+        let position = self.pointers.iter().position(|p| *p == pointer);
+
+        if position.is_none() {
+            if self.confined.get() {
+                let surface = self.window.surface();
+                pointer.confine(&surface);
+            }
+            self.pointers.push(pointer);
+        }
+
+        // Apply the current cursor style.
+        self.set_cursor_visible(self.cursor_visible.get());
+    }
+
+    /// Pointer left the window.
+    pub fn pointer_left(&mut self, pointer: WinitPointer) {
+        let position = self.pointers.iter().position(|p| *p == pointer);
+
+        if let Some(position) = position {
+            let pointer = self.pointers.remove(position);
+
+            // Drop the confined pointer.
+            if self.confined.get() {
+                pointer.unconfine();
+            }
+        }
+    }
+
+    pub fn text_input_entered(&mut self, text_input: TextInputHandler) {
+        if self
+            .text_inputs
+            .iter()
+            .find(|t| *t == &text_input)
+            .is_none()
+        {
+            self.text_inputs.push(text_input);
+        }
+    }
+
+    pub fn text_input_left(&mut self, text_input: TextInputHandler) {
+        if let Some(position) = self.text_inputs.iter().position(|t| *t == text_input) {
+            self.text_inputs.remove(position);
+        }
+    }
+
+    pub fn set_ime_position(&self, position: LogicalPosition<u32>) {
+        // XXX This won't fly unless user will have a way to request IME window per seat, since
+        // the ime windows will be overlapping, but winit doesn't expose API to specify for
+        // which seat we're setting IME position.
+        let (x, y) = (position.x as i32, position.y as i32);
+        for text_input in self.text_inputs.iter() {
+            text_input.set_ime_position(x, y);
+        }
+    }
+
+    pub fn set_cursor_visible(&self, visible: bool) {
+        self.cursor_visible.replace(visible);
+        let cursor_icon = match visible {
+            true => Some(self.cursor_icon.get()),
+            false => None,
+        };
+
+        for pointer in self.pointers.iter() {
+            pointer.set_cursor(cursor_icon)
+        }
+    }
+
+    pub fn set_cursor_icon(&self, cursor_icon: CursorIcon) {
+        self.cursor_icon.replace(cursor_icon);
+
+        if !self.cursor_visible.get() {
+            return;
+        }
+
+        for pointer in self.pointers.iter() {
+            pointer.set_cursor(Some(cursor_icon));
+        }
+    }
+}
+
+#[inline]
+pub fn handle_window_requests(winit_state: &mut WinitState) {
+    let window_map = &mut winit_state.window_map;
+    let window_updates = &mut winit_state.window_updates;
+    let mut windows_to_close: Vec<WindowId> = Vec::new();
+
+    // Process the rest of the events.
+    for (window_id, window_handle) in window_map.iter_mut() {
+        let mut requests = window_handle.pending_window_requests.lock().unwrap();
+        for request in requests.drain(..) {
+            match request {
+                WindowRequest::Fullscreen(fullscreen) => {
+                    window_handle.window.set_fullscreen(fullscreen.as_ref());
+                }
+                WindowRequest::UnsetFullscreen => {
+                    window_handle.window.unset_fullscreen();
+                }
+                WindowRequest::ShowCursor(show_cursor) => {
+                    window_handle.set_cursor_visible(show_cursor);
+                }
+                WindowRequest::NewCursorIcon(cursor_icon) => {
+                    window_handle.set_cursor_icon(cursor_icon);
+                }
+                WindowRequest::IMEPosition(position) => {
+                    window_handle.set_ime_position(position);
+                }
+                WindowRequest::GrabCursor(grab) => {
+                    window_handle.set_cursor_grab(grab);
+                }
+                WindowRequest::Maximize(maximize) => {
+                    if maximize {
+                        window_handle.window.set_maximized();
+                    } else {
+                        window_handle.window.unset_maximized();
+                    }
+                }
+                WindowRequest::Minimize => {
+                    window_handle.window.set_minimized();
+                }
+                WindowRequest::Decorate(decorate) => {
+                    let decorations = match decorate {
+                        true => Decorations::FollowServer,
+                        false => Decorations::None,
+                    };
+
+                    window_handle.window.set_decorate(decorations);
+
+                    // We should refresh the frame to apply decorations change.
+                    let window_update = window_updates.get_mut(&window_id).unwrap();
+                    window_update.refresh_frame = true;
+                }
+                WindowRequest::Resizeable(resizeable) => {
+                    window_handle.window.set_resizable(resizeable);
+
+                    // We should refresh the frame to update button state.
+                    let window_update = window_updates.get_mut(&window_id).unwrap();
+                    window_update.refresh_frame = true;
+                }
+                WindowRequest::Title(title) => {
+                    window_handle.window.set_title(title);
+
+                    // We should refresh the frame to draw new title.
+                    let window_update = window_updates.get_mut(&window_id).unwrap();
+                    window_update.refresh_frame = true;
+                }
+                WindowRequest::MinSize(size) => {
+                    let size = size.map(|size| (size.width, size.height));
+                    window_handle.window.set_min_size(size);
+
+                    let window_update = window_updates.get_mut(&window_id).unwrap();
+                    window_update.redraw_requested = true;
+                }
+                WindowRequest::MaxSize(size) => {
+                    let size = size.map(|size| (size.width, size.height));
+                    window_handle.window.set_max_size(size);
+
+                    let window_update = window_updates.get_mut(&window_id).unwrap();
+                    window_update.redraw_requested = true;
+                }
+                WindowRequest::FrameSize(size) => {
+                    // Set new size.
+                    window_handle.window.resize(size.width, size.height);
+
+                    // We should refresh the frame after resize.
+                    let window_update = window_updates.get_mut(&window_id).unwrap();
+                    window_update.refresh_frame = true;
+                }
+                WindowRequest::Redraw => {
+                    let window_update = window_updates.get_mut(&window_id).unwrap();
+                    window_update.redraw_requested = true;
+                }
+                WindowRequest::Theme(concept_config) => {
+                    window_handle.window.set_frame_config(concept_config);
+
+                    // We should refresh the frame to apply new theme.
+                    let window_update = window_updates.get_mut(&window_id).unwrap();
+                    window_update.refresh_frame = true;
+                }
+                WindowRequest::Close => {
+                    // The window was requested to be closed.
+                    windows_to_close.push(*window_id);
+
+                    // Send event that the window was destroyed.
+                    let event_sink = &mut winit_state.event_sink;
+                    event_sink.push_window_event(WindowEvent::Destroyed, *window_id);
+                }
+            };
+        }
+    }
+
+    // Close the windows.
+    for window in windows_to_close {
+        let _ = window_map.remove(&window);
+        let _ = window_updates.remove(&window);
+    }
+}

src/platform_impl/linux/x11/event_processor.rs

@@ -20,6 +20,9 @@ use crate::{
     event_loop::EventLoopWindowTarget as RootELW,
 };
 
+/// The X11 documentation states: "Keycodes lie in the inclusive range [8,255]".
+const KEYCODE_OFFSET: u8 = 8;
+
 pub(super) struct EventProcessor<T: 'static> {
     pub(super) dnd: Dnd,
     pub(super) ime_receiver: ImeReceiver,
@@ -32,6 +35,8 @@ pub(super) struct EventProcessor<T: 'static> {
     // Number of touch events currently in progress
     pub(super) num_touch: u32,
     pub(super) first_touch: Option<u64>,
+    // Currently focused window belonging to this process
+    pub(super) active_window: Option<ffi::Window>,
 }
 
 impl<T: 'static> EventProcessor<T> {
@@ -136,11 +141,12 @@ impl<T: 'static> EventProcessor<T> {
                         if let Some(modifiers) =
                             self.device_mod_state.update_state(&state, modifier)
                         {
-                            let device_id = mkdid(util::VIRTUAL_CORE_KEYBOARD);
-                            callback(Event::DeviceEvent {
-                                device_id,
-                                event: DeviceEvent::ModifiersChanged(modifiers),
-                            });
+                            if let Some(window_id) = self.active_window {
+                                callback(Event::WindowEvent {
+                                    window_id: mkwid(window_id),
+                                    event: WindowEvent::ModifiersChanged(modifiers),
+                                });
+                            }
                         }
                     }
                 }
@@ -562,7 +568,7 @@ impl<T: 'static> EventProcessor<T> {
                 // When a compose sequence or IME pre-edit is finished, it ends in a KeyPress with
                 // a keycode of 0.
                 if keycode != 0 {
-                    let scancode = keycode - 8;
+                    let scancode = keycode - KEYCODE_OFFSET as u32;
                     let keysym = wt.xconn.lookup_keysym(xkev);
                     let virtual_keycode = events::keysym_to_element(keysym as c_uint);
 
@@ -703,7 +709,7 @@ impl<T: 'static> EventProcessor<T> {
                                 event: MouseInput {
                                     device_id,
                                     state,
-                                    button: Other(x as u8),
+                                    button: Other(x as u16),
                                     modifiers,
                                 },
                             }),
@@ -872,44 +878,61 @@ impl<T: 'static> EventProcessor<T> {
                     ffi::XI_FocusIn => {
                         let xev: &ffi::XIFocusInEvent = unsafe { &*(xev.data as *const _) };
 
-                        let window_id = mkwid(xev.event);
-
                         wt.ime
                             .borrow_mut()
                             .focus(xev.event)
                             .expect("Failed to focus input context");
 
-                        callback(Event::WindowEvent {
-                            window_id,
-                            event: Focused(true),
-                        });
-
                         let modifiers = ModifiersState::from_x11(&xev.mods);
 
-                        update_modifiers!(modifiers, None);
+                        self.device_mod_state.update_state(&modifiers, None);
 
-                        // The deviceid for this event is for a keyboard instead of a pointer,
-                        // so we have to do a little extra work.
-                        let pointer_id = self
-                            .devices
-                            .borrow()
-                            .get(&DeviceId(xev.deviceid))
-                            .map(|device| device.attachment)
-                            .unwrap_or(2);
+                        if self.active_window != Some(xev.event) {
+                            self.active_window = Some(xev.event);
 
-                        let position = PhysicalPosition::new(xev.event_x, xev.event_y);
+                            let window_id = mkwid(xev.event);
+                            let position = PhysicalPosition::new(xev.event_x, xev.event_y);
 
-                        callback(Event::WindowEvent {
-                            window_id,
-                            event: CursorMoved {
-                                device_id: mkdid(pointer_id),
-                                position,
-                                modifiers,
-                            },
-                        });
+                            callback(Event::WindowEvent {
+                                window_id,
+                                event: Focused(true),
+                            });
 
-                        // Issue key press events for all pressed keys
-                        self.handle_pressed_keys(window_id, ElementState::Pressed, &mut callback);
+                            if !modifiers.is_empty() {
+                                callback(Event::WindowEvent {
+                                    window_id,
+                                    event: WindowEvent::ModifiersChanged(modifiers),
+                                });
+                            }
+
+                            // The deviceid for this event is for a keyboard instead of a pointer,
+                            // so we have to do a little extra work.
+                            let pointer_id = self
+                                .devices
+                                .borrow()
+                                .get(&DeviceId(xev.deviceid))
+                                .map(|device| device.attachment)
+                                .unwrap_or(2);
+
+                            callback(Event::WindowEvent {
+                                window_id,
+                                event: CursorMoved {
+                                    device_id: mkdid(pointer_id),
+                                    position,
+                                    modifiers,
+                                },
+                            });
+
+                            // Issue key press events for all pressed keys
+                            Self::handle_pressed_keys(
+                                &wt,
+                                window_id,
+                                ElementState::Pressed,
+                                &self.mod_keymap,
+                                &mut self.device_mod_state,
+                                &mut callback,
+                            );
+                        }
                     }
                     ffi::XI_FocusOut => {
                         let xev: &ffi::XIFocusOutEvent = unsafe { &*(xev.data as *const _) };
@@ -921,15 +944,29 @@ impl<T: 'static> EventProcessor<T> {
                             .unfocus(xev.event)
                             .expect("Failed to unfocus input context");
 
-                        let window_id = mkwid(xev.event);
+                        if self.active_window.take() == Some(xev.event) {
+                            let window_id = mkwid(xev.event);
 
-                        // Issue key release events for all pressed keys
-                        self.handle_pressed_keys(window_id, ElementState::Released, &mut callback);
+                            // Issue key release events for all pressed keys
+                            Self::handle_pressed_keys(
+                                &wt,
+                                window_id,
+                                ElementState::Released,
+                                &self.mod_keymap,
+                                &mut self.device_mod_state,
+                                &mut callback,
+                            );
 
-                        callback(Event::WindowEvent {
-                            window_id,
-                            event: Focused(false),
-                        })
+                            callback(Event::WindowEvent {
+                                window_id,
+                                event: WindowEvent::ModifiersChanged(ModifiersState::empty()),
+                            });
+
+                            callback(Event::WindowEvent {
+                                window_id,
+                                event: Focused(false),
+                            })
+                        }
                     }
 
                     ffi::XI_TouchBegin | ffi::XI_TouchUpdate | ffi::XI_TouchEnd => {
@@ -1053,10 +1090,10 @@ impl<T: 'static> EventProcessor<T> {
 
                         let device_id = mkdid(xev.sourceid);
                         let keycode = xev.detail;
-                        if keycode < 8 {
+                        let scancode = keycode - KEYCODE_OFFSET as i32;
+                        if scancode < 0 {
                             return;
                         }
-                        let scancode = (keycode - 8) as u32;
                         let keysym = wt.xconn.keycode_to_keysym(keycode as ffi::KeyCode);
                         let virtual_keycode = events::keysym_to_element(keysym as c_uint);
                         let modifiers = self.device_mod_state.modifiers();
@@ -1065,7 +1102,7 @@ impl<T: 'static> EventProcessor<T> {
                         callback(Event::DeviceEvent {
                             device_id,
                             event: DeviceEvent::Key(KeyboardInput {
-                                scancode,
+                                scancode: scancode as u32,
                                 virtual_keycode,
                                 state,
                                 modifiers,
@@ -1084,10 +1121,12 @@ impl<T: 'static> EventProcessor<T> {
                             let new_modifiers = self.device_mod_state.modifiers();
 
                             if modifiers != new_modifiers {
-                                callback(Event::DeviceEvent {
-                                    device_id,
-                                    event: DeviceEvent::ModifiersChanged(new_modifiers),
-                                });
+                                if let Some(window_id) = self.active_window {
+                                    callback(Event::WindowEvent {
+                                        window_id: mkwid(window_id),
+                                        event: WindowEvent::ModifiersChanged(new_modifiers),
+                                    });
+                                }
                             }
                         }
                     }
@@ -1191,30 +1230,37 @@ impl<T: 'static> EventProcessor<T> {
     }
 
     fn handle_pressed_keys<F>(
-        &self,
+        wt: &super::EventLoopWindowTarget<T>,
         window_id: crate::window::WindowId,
         state: ElementState,
+        mod_keymap: &ModifierKeymap,
+        device_mod_state: &mut ModifierKeyState,
         callback: &mut F,
     ) where
         F: FnMut(Event<'_, T>),
     {
-        let wt = get_xtarget(&self.target);
-
         let device_id = mkdid(util::VIRTUAL_CORE_KEYBOARD);
-        let modifiers = self.device_mod_state.modifiers();
+        let modifiers = device_mod_state.modifiers();
 
-        // Get the set of keys currently pressed and apply Key events to each
-        let keys = wt.xconn.query_keymap();
-
-        for keycode in &keys {
-            if keycode < 8 {
-                continue;
-            }
-
-            let scancode = (keycode - 8) as u32;
+        // Update modifiers state and emit key events based on which keys are currently pressed.
+        for keycode in wt
+            .xconn
+            .query_keymap()
+            .into_iter()
+            .filter(|k| *k >= KEYCODE_OFFSET)
+        {
+            let scancode = (keycode - KEYCODE_OFFSET) as u32;
             let keysym = wt.xconn.keycode_to_keysym(keycode);
             let virtual_keycode = events::keysym_to_element(keysym as c_uint);
 
+            if let Some(modifier) = mod_keymap.get_modifier(keycode as ffi::KeyCode) {
+                device_mod_state.key_event(
+                    ElementState::Pressed,
+                    keycode as ffi::KeyCode,
+                    modifier,
+                );
+            }
+
             #[allow(deprecated)]
             callback(Event::WindowEvent {
                 window_id,

src/platform_impl/linux/x11/events.rs

@@ -81,12 +81,12 @@ pub fn keysym_to_element(keysym: libc::c_uint) -> Option<VirtualKeyCode> {
         ffi::XK_KP_Insert => VirtualKeyCode::Insert,
         ffi::XK_KP_Delete => VirtualKeyCode::Delete,
         ffi::XK_KP_Equal => VirtualKeyCode::NumpadEquals,
-        //ffi::XK_KP_Multiply => VirtualKeyCode::NumpadMultiply,
-        ffi::XK_KP_Add => VirtualKeyCode::Add,
+        ffi::XK_KP_Multiply => VirtualKeyCode::NumpadMultiply,
+        ffi::XK_KP_Add => VirtualKeyCode::NumpadAdd,
         //ffi::XK_KP_Separator => VirtualKeyCode::Kp_separator,
-        ffi::XK_KP_Subtract => VirtualKeyCode::Subtract,
-        //ffi::XK_KP_Decimal => VirtualKeyCode::Kp_decimal,
-        ffi::XK_KP_Divide => VirtualKeyCode::Divide,
+        ffi::XK_KP_Subtract => VirtualKeyCode::NumpadSubtract,
+        ffi::XK_KP_Decimal => VirtualKeyCode::NumpadDecimal,
+        ffi::XK_KP_Divide => VirtualKeyCode::NumpadDivide,
         ffi::XK_KP_0 => VirtualKeyCode::Numpad0,
         ffi::XK_KP_1 => VirtualKeyCode::Numpad1,
         ffi::XK_KP_2 => VirtualKeyCode::Numpad2,
@@ -183,10 +183,10 @@ pub fn keysym_to_element(keysym: libc::c_uint) -> Option<VirtualKeyCode> {
         //ffi::XK_quoteright => VirtualKeyCode::Quoteright,
         //ffi::XK_parenleft => VirtualKeyCode::Parenleft,
         //ffi::XK_parenright => VirtualKeyCode::Parenright,
-        //ffi::XK_asterisk => VirtualKeyCode::Asterisk,
-        ffi::XK_plus => VirtualKeyCode::Add,
+        ffi::XK_asterisk => VirtualKeyCode::Asterisk,
+        ffi::XK_plus => VirtualKeyCode::Plus,
         ffi::XK_comma => VirtualKeyCode::Comma,
-        ffi::XK_minus => VirtualKeyCode::Subtract,
+        ffi::XK_minus => VirtualKeyCode::Minus,
         ffi::XK_period => VirtualKeyCode::Period,
         ffi::XK_slash => VirtualKeyCode::Slash,
         ffi::XK_0 => VirtualKeyCode::Key0,

src/platform_impl/linux/x11/ime/input_method.rs

@@ -21,7 +21,8 @@ unsafe fn open_im(xconn: &Arc<XConnection>, locale_modifiers: &CStr) -> Option<f
     // XSetLocaleModifiers returns...
     // * The current locale modifiers if it's given a NULL pointer.
     // * The new locale modifiers if we succeeded in setting them.
-    // * NULL if the locale modifiers string is malformed.
+    // * NULL if the locale modifiers string is malformed or if the
+    //   current locale is not supported by Xlib.
     (xconn.xlib.XSetLocaleModifiers)(locale_modifiers.as_ptr());
 
     let im = (xconn.xlib.XOpenIM)(

src/platform_impl/linux/x11/mod.rs

@@ -29,9 +29,10 @@ use std::{
     mem::{self, MaybeUninit},
     ops::Deref,
     os::raw::*,
+    ptr,
     rc::Rc,
     slice,
-    sync::{mpsc, Arc, Mutex, Weak},
+    sync::{mpsc, Arc, Weak},
     time::{Duration, Instant},
 };
 
@@ -57,6 +58,7 @@ use crate::{
 
 const X_TOKEN: Token = Token(0);
 const USER_TOKEN: Token = Token(1);
+const REDRAW_TOKEN: Token = Token(2);
 
 pub struct EventLoopWindowTarget<T> {
     xconn: Arc<XConnection>,
@@ -66,13 +68,14 @@ pub struct EventLoopWindowTarget<T> {
     root: ffi::Window,
     ime: RefCell<Ime>,
     windows: RefCell<HashMap<WindowId, Weak<UnownedWindow>>>,
-    pending_redraws: Arc<Mutex<HashSet<WindowId>>>,
+    redraw_sender: Sender<WindowId>,
     _marker: ::std::marker::PhantomData<T>,
 }
 
 pub struct EventLoop<T: 'static> {
     poll: Poll,
     event_processor: EventProcessor<T>,
+    redraw_channel: Receiver<WindowId>,
     user_channel: Receiver<T>,
     user_sender: Sender<T>,
     target: Rc<RootELW<T>>,
@@ -105,7 +108,25 @@ impl<T: 'static> EventLoop<T> {
         // Input methods will open successfully without setting the locale, but it won't be
         // possible to actually commit pre-edit sequences.
         unsafe {
+            // Remember default locale to restore it if target locale is unsupported
+            // by Xlib
+            let default_locale = setlocale(LC_CTYPE, ptr::null());
             setlocale(LC_CTYPE, b"\0".as_ptr() as *const _);
+
+            // Check if set locale is supported by Xlib.
+            // If not, calls to some Xlib functions like `XSetLocaleModifiers`
+            // will fail.
+            let locale_supported = (xconn.xlib.XSupportsLocale)() == 1;
+            if !locale_supported {
+                let unsupported_locale = setlocale(LC_CTYPE, ptr::null());
+                warn!(
+                    "Unsupported locale \"{}\". Restoring default locale \"{}\".",
+                    CStr::from_ptr(unsupported_locale).to_string_lossy(),
+                    CStr::from_ptr(default_locale).to_string_lossy()
+                );
+                // Restore default locale
+                setlocale(LC_CTYPE, default_locale);
+            }
         }
         let ime = RefCell::new({
             let result = Ime::new(Arc::clone(&xconn));
@@ -155,32 +176,16 @@ impl<T: 'static> EventLoop<T> {
 
         xconn.update_cached_wm_info(root);
 
-        let pending_redraws: Arc<Mutex<HashSet<WindowId>>> = Default::default();
-
         let mut mod_keymap = ModifierKeymap::new();
         mod_keymap.reset_from_x_connection(&xconn);
 
-        let target = Rc::new(RootELW {
-            p: super::EventLoopWindowTarget::X(EventLoopWindowTarget {
-                ime,
-                root,
-                windows: Default::default(),
-                _marker: ::std::marker::PhantomData,
-                ime_sender,
-                xconn,
-                wm_delete_window,
-                net_wm_ping,
-                pending_redraws: pending_redraws.clone(),
-            }),
-            _marker: ::std::marker::PhantomData,
-        });
-
         let poll = Poll::new().unwrap();
 
         let (user_sender, user_channel) = channel();
+        let (redraw_sender, redraw_channel) = channel();
 
         poll.register(
-            &EventedFd(&get_xtarget(&target).xconn.x11_fd),
+            &EventedFd(&xconn.x11_fd),
             X_TOKEN,
             Ready::readable(),
             PollOpt::level(),
@@ -195,6 +200,29 @@ impl<T: 'static> EventLoop<T> {
         )
         .unwrap();
 
+        poll.register(
+            &redraw_channel,
+            REDRAW_TOKEN,
+            Ready::readable(),
+            PollOpt::level(),
+        )
+        .unwrap();
+
+        let target = Rc::new(RootELW {
+            p: super::EventLoopWindowTarget::X(EventLoopWindowTarget {
+                ime,
+                root,
+                windows: Default::default(),
+                _marker: ::std::marker::PhantomData,
+                ime_sender,
+                xconn,
+                wm_delete_window,
+                net_wm_ping,
+                redraw_sender,
+            }),
+            _marker: ::std::marker::PhantomData,
+        });
+
         let event_processor = EventProcessor {
             target: target.clone(),
             dnd,
@@ -206,6 +234,7 @@ impl<T: 'static> EventLoop<T> {
             device_mod_state: Default::default(),
             num_touch: 0,
             first_touch: None,
+            active_window: None,
         };
 
         // Register for device hotplug events
@@ -219,6 +248,7 @@ impl<T: 'static> EventLoop<T> {
 
         let result = EventLoop {
             poll,
+            redraw_channel,
             user_channel,
             user_sender,
             event_processor,
@@ -238,29 +268,25 @@ impl<T: 'static> EventLoop<T> {
         &self.target
     }
 
-    pub(crate) fn x_connection(&self) -> &Arc<XConnection> {
-        get_xtarget(&self.target).x_connection()
-    }
-
     pub fn run_return<F>(&mut self, mut callback: F)
     where
         F: FnMut(Event<'_, T>, &RootELW<T>, &mut ControlFlow),
     {
         let mut control_flow = ControlFlow::default();
         let mut events = Events::with_capacity(8);
-
-        callback(
-            crate::event::Event::NewEvents(crate::event::StartCause::Init),
-            &self.target,
-            &mut control_flow,
-        );
+        let mut cause = StartCause::Init;
 
         loop {
+            sticky_exit_callback(
+                crate::event::Event::NewEvents(cause),
+                &self.target,
+                &mut control_flow,
+                &mut callback,
+            );
+
             // Process all pending events
             self.drain_events(&mut callback, &mut control_flow);
 
-            let wt = get_xtarget(&self.target);
-
             // Empty the user event buffer
             {
                 while let Ok(event) = self.user_channel.try_recv() {
@@ -283,12 +309,16 @@ impl<T: 'static> EventLoop<T> {
             }
             // Empty the redraw requests
             {
-                // Release the lock to prevent deadlock
-                let windows: Vec<_> = wt.pending_redraws.lock().unwrap().drain().collect();
+                let mut windows = HashSet::new();
 
-                for wid in windows {
+                while let Ok(window_id) = self.redraw_channel.try_recv() {
+                    windows.insert(window_id);
+                }
+
+                for window_id in windows {
+                    let window_id = crate::window::WindowId(super::WindowId::X(window_id));
                     sticky_exit_callback(
-                        Event::RedrawRequested(crate::window::WindowId(super::WindowId::X(wid))),
+                        Event::RedrawRequested(window_id),
                         &self.target,
                         &mut control_flow,
                         &mut callback,
@@ -306,7 +336,7 @@ impl<T: 'static> EventLoop<T> {
             }
 
             let start = Instant::now();
-            let (mut cause, deadline, timeout);
+            let (deadline, timeout);
 
             match control_flow {
                 ControlFlow::Exit => break,
@@ -337,38 +367,20 @@ impl<T: 'static> EventLoop<T> {
                 }
             }
 
-            if self.event_processor.poll() {
-                // If the XConnection already contains buffered events, we don't
-                // need to wait for data on the socket.
-                // However, we still need to check for user events.
-                self.poll
-                    .poll(&mut events, Some(Duration::from_millis(0)))
-                    .unwrap();
-                events.clear();
-
-                callback(
-                    crate::event::Event::NewEvents(cause),
-                    &self.target,
-                    &mut control_flow,
-                );
-            } else {
+            // If the XConnection already contains buffered events, we don't
+            // need to wait for data on the socket.
+            if !self.event_processor.poll() {
                 self.poll.poll(&mut events, timeout).unwrap();
                 events.clear();
+            }
 
-                let wait_cancelled = deadline.map_or(false, |deadline| Instant::now() < deadline);
+            let wait_cancelled = deadline.map_or(false, |deadline| Instant::now() < deadline);
 
-                if wait_cancelled {
-                    cause = StartCause::WaitCancelled {
-                        start,
-                        requested_resume: deadline,
-                    };
-                }
-
-                callback(
-                    crate::event::Event::NewEvents(cause),
-                    &self.target,
-                    &mut control_flow,
-                );
+            if wait_cancelled {
+                cause = StartCause::WaitCancelled {
+                    start,
+                    requested_resume: deadline,
+                };
             }
         }
 
@@ -408,7 +420,7 @@ impl<T: 'static> EventLoop<T> {
                             super::WindowId::X(wid),
                         )) = event
                         {
-                            wt.pending_redraws.lock().unwrap().insert(wid);
+                            wt.redraw_sender.send(wid).unwrap();
                         } else {
                             callback(event, window_target, control_flow);
                         }
@@ -422,6 +434,7 @@ impl<T: 'static> EventLoop<T> {
 pub(crate) fn get_xtarget<T>(target: &RootELW<T>) -> &EventLoopWindowTarget<T> {
     match target.p {
         super::EventLoopWindowTarget::X(ref target) => target,
+        #[cfg(feature = "wayland")]
         _ => unreachable!(),
     }
 }
@@ -489,9 +502,21 @@ impl<'a> Deref for DeviceInfo<'a> {
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct WindowId(ffi::Window);
 
+impl WindowId {
+    pub unsafe fn dummy() -> Self {
+        WindowId(0)
+    }
+}
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId(c_int);
 
+impl DeviceId {
+    pub unsafe fn dummy() -> Self {
+        DeviceId(0)
+    }
+}
+
 pub struct Window(Arc<UnownedWindow>);
 
 impl Deref for Window {

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

@@ -1,5 +1,5 @@
 use super::*;
-use crate::window::{Icon, Pixel, PIXEL_SIZE};
+use crate::icon::{Icon, Pixel, PIXEL_SIZE};
 
 impl Pixel {
     pub fn to_packed_argb(&self) -> Cardinal {
@@ -18,13 +18,14 @@ impl Pixel {
 
 impl Icon {
     pub(crate) fn to_cardinals(&self) -> Vec<Cardinal> {
-        assert_eq!(self.rgba.len() % PIXEL_SIZE, 0);
-        let pixel_count = self.rgba.len() / PIXEL_SIZE;
-        assert_eq!(pixel_count, (self.width * self.height) as usize);
+        let rgba_icon = &self.inner;
+        assert_eq!(rgba_icon.rgba.len() % PIXEL_SIZE, 0);
+        let pixel_count = rgba_icon.rgba.len() / PIXEL_SIZE;
+        assert_eq!(pixel_count, (rgba_icon.width * rgba_icon.height) as usize);
         let mut data = Vec::with_capacity(pixel_count);
-        data.push(self.width as Cardinal);
-        data.push(self.height as Cardinal);
-        let pixels = self.rgba.as_ptr() as *const Pixel;
+        data.push(rgba_icon.width as Cardinal);
+        data.push(rgba_icon.height as Cardinal);
+        let pixels = rgba_icon.rgba.as_ptr() as *const Pixel;
         for pixel_index in 0..pixel_count {
             let pixel = unsafe { &*pixels.offset(pixel_index as isize) };
             data.push(pixel.to_packed_argb());

src/platform_impl/linux/x11/window.rs

@@ -1,8 +1,6 @@
 use raw_window_handle::unix::XlibHandle;
 use std::{
-    cmp,
-    collections::HashSet,
-    env,
+    cmp, env,
     ffi::CString,
     mem::{self, replace, MaybeUninit},
     os::raw::*,
@@ -12,6 +10,7 @@ use std::{
 };
 
 use libc;
+use mio_extras::channel::Sender;
 use parking_lot::Mutex;
 
 use crate::{
@@ -23,7 +22,7 @@ use crate::{
         MonitorHandle as PlatformMonitorHandle, OsError, PlatformSpecificWindowBuilderAttributes,
         VideoMode as PlatformVideoMode,
     },
-    window::{CursorIcon, Fullscreen, Icon, WindowAttributes},
+    window::{CursorIcon, Fullscreen, Icon, UserAttentionType, WindowAttributes},
 };
 
 use super::{ffi, util, EventLoopWindowTarget, ImeSender, WindowId, XConnection, XError};
@@ -104,7 +103,7 @@ pub struct UnownedWindow {
     cursor_visible: Mutex<bool>,
     ime_sender: Mutex<ImeSender>,
     pub shared_state: Mutex<SharedState>,
-    pending_redraws: Arc<::std::sync::Mutex<HashSet<WindowId>>>,
+    redraw_sender: Sender<WindowId>,
 }
 
 impl UnownedWindow {
@@ -136,23 +135,23 @@ impl UnownedWindow {
                 })
                 .unwrap_or_else(|| monitors.swap_remove(0))
         };
-        let dpi_factor = guessed_monitor.scale_factor();
+        let scale_factor = guessed_monitor.scale_factor();
 
-        info!("Guessed window scale factor: {}", dpi_factor);
+        info!("Guessed window scale factor: {}", scale_factor);
 
         let max_inner_size: Option<(u32, u32)> = window_attrs
             .max_inner_size
-            .map(|size| size.to_physical::<u32>(dpi_factor).into());
+            .map(|size| size.to_physical::<u32>(scale_factor).into());
         let min_inner_size: Option<(u32, u32)> = window_attrs
             .min_inner_size
-            .map(|size| size.to_physical::<u32>(dpi_factor).into());
+            .map(|size| size.to_physical::<u32>(scale_factor).into());
 
         let dimensions = {
             // x11 only applies constraints when the window is actively resized
             // by the user, so we have to manually apply the initial constraints
             let mut dimensions: (u32, u32) = window_attrs
                 .inner_size
-                .map(|size| size.to_physical::<u32>(dpi_factor))
+                .map(|size| size.to_physical::<u32>(scale_factor))
                 .or_else(|| Some((800, 600).into()))
                 .map(Into::into)
                 .unwrap();
@@ -227,7 +226,7 @@ impl UnownedWindow {
                 // is > 0, like we do in glutin.
                 //
                 // It is non obvious which masks, if any, we should pass to
-                // `XGetVisualInfo`. winit doesn't recieve any info about what
+                // `XGetVisualInfo`. winit doesn't receive any info about what
                 // properties the user wants. Users should consider choosing the
                 // visual themselves as glutin does.
                 match pl_attribs.visual_infos {
@@ -249,7 +248,7 @@ impl UnownedWindow {
             cursor_visible: Mutex::new(true),
             ime_sender: Mutex::new(event_loop.ime_sender.clone()),
             shared_state: SharedState::new(guessed_monitor, window_attrs.visible),
-            pending_redraws: event_loop.pending_redraws.clone(),
+            redraw_sender: event_loop.redraw_sender.clone(),
         };
 
         // Title must be set before mapping. Some tiling window managers (i.e. i3) use the window
@@ -324,10 +323,10 @@ impl UnownedWindow {
             {
                 let mut min_inner_size = window_attrs
                     .min_inner_size
-                    .map(|size| size.to_physical::<u32>(dpi_factor));
+                    .map(|size| size.to_physical::<u32>(scale_factor));
                 let mut max_inner_size = window_attrs
                     .max_inner_size
-                    .map(|size| size.to_physical::<u32>(dpi_factor));
+                    .map(|size| size.to_physical::<u32>(scale_factor));
 
                 if !window_attrs.resizable {
                     if util::wm_name_is_one_of(&["Xfwm4"]) {
@@ -351,12 +350,12 @@ impl UnownedWindow {
                 normal_hints.set_resize_increments(
                     pl_attribs
                         .resize_increments
-                        .map(|size| size.to_physical::<u32>(dpi_factor).into()),
+                        .map(|size| size.to_physical::<u32>(scale_factor).into()),
                 );
                 normal_hints.set_base_size(
                     pl_attribs
                         .base_size
-                        .map(|size| size.to_physical::<u32>(dpi_factor).into()),
+                        .map(|size| size.to_physical::<u32>(scale_factor).into()),
                 );
                 xconn.set_normal_hints(window.xwindow, normal_hints).queue();
             }
@@ -524,23 +523,6 @@ impl UnownedWindow {
         )
     }
 
-    #[inline]
-    pub fn set_urgent(&self, is_urgent: bool) {
-        let mut wm_hints = self
-            .xconn
-            .get_wm_hints(self.xwindow)
-            .expect("`XGetWMHints` failed");
-        if is_urgent {
-            (*wm_hints).flags |= ffi::XUrgencyHint;
-        } else {
-            (*wm_hints).flags &= !ffi::XUrgencyHint;
-        }
-        self.xconn
-            .set_wm_hints(self.xwindow, wm_hints)
-            .flush()
-            .expect("Failed to set urgency hint");
-    }
-
     fn set_netwm(
         &self,
         operation: util::StateOperation,
@@ -640,6 +622,7 @@ impl UnownedWindow {
                 let flusher = self.set_fullscreen_hint(false);
                 let mut shared_state_lock = self.shared_state.lock();
                 if let Some(position) = shared_state_lock.restore_position.take() {
+                    drop(shared_state_lock);
                     self.set_position_inner(position.0, position.1).queue();
                 }
                 Some(flusher)
@@ -648,10 +631,12 @@ impl UnownedWindow {
                 let (video_mode, monitor) = match fullscreen {
                     Fullscreen::Exclusive(RootVideoMode {
                         video_mode: PlatformVideoMode::X(ref video_mode),
-                    }) => (Some(video_mode), video_mode.monitor.as_ref().unwrap()),
-                    Fullscreen::Borderless(RootMonitorHandle {
-                        inner: PlatformMonitorHandle::X(ref monitor),
-                    }) => (None, monitor),
+                    }) => (Some(video_mode), video_mode.monitor.clone().unwrap()),
+                    Fullscreen::Borderless(Some(RootMonitorHandle {
+                        inner: PlatformMonitorHandle::X(monitor),
+                    })) => (None, monitor),
+                    Fullscreen::Borderless(None) => (None, self.current_monitor()),
+                    #[cfg(feature = "wayland")]
                     _ => unreachable!(),
                 };
 
@@ -1053,8 +1038,8 @@ impl UnownedWindow {
 
     #[inline]
     pub fn set_inner_size(&self, size: Size) {
-        let dpi_factor = self.scale_factor();
-        let (width, height) = size.to_physical::<u32>(dpi_factor).into();
+        let scale_factor = self.scale_factor();
+        let (width, height) = size.to_physical::<u32>(scale_factor).into();
         self.set_inner_size_physical(width, height);
     }
 
@@ -1097,16 +1082,16 @@ impl UnownedWindow {
 
     pub(crate) fn adjust_for_dpi(
         &self,
-        old_dpi_factor: f64,
-        new_dpi_factor: f64,
+        old_scale_factor: f64,
+        new_scale_factor: f64,
         width: u32,
         height: u32,
         shared_state: &SharedState,
     ) -> (u32, u32) {
-        let scale_factor = new_dpi_factor / old_dpi_factor;
+        let scale_factor = new_scale_factor / old_scale_factor;
         self.update_normal_hints(|normal_hints| {
             let dpi_adjuster =
-                |size: Size| -> (u32, u32) { size.to_physical::<u32>(new_dpi_factor).into() };
+                |size: Size| -> (u32, u32) { size.to_physical::<u32>(new_scale_factor).into() };
             let max_size = shared_state.max_inner_size.map(&dpi_adjuster);
             let min_size = shared_state.min_inner_size.map(&dpi_adjuster);
             let resize_increments = shared_state.resize_increments.map(&dpi_adjuster);
@@ -1146,12 +1131,12 @@ impl UnownedWindow {
 
         self.set_maximizable_inner(resizable).queue();
 
-        let dpi_factor = self.scale_factor();
+        let scale_factor = self.scale_factor();
         let min_inner_size = min_size
-            .map(|size| size.to_physical::<u32>(dpi_factor))
+            .map(|size| size.to_physical::<u32>(scale_factor))
             .map(Into::into);
         let max_inner_size = max_size
-            .map(|size| size.to_physical::<u32>(dpi_factor))
+            .map(|size| size.to_physical::<u32>(scale_factor))
             .map(Into::into);
         self.update_normal_hints(|normal_hints| {
             normal_hints.set_min_size(min_inner_size);
@@ -1304,6 +1289,23 @@ impl UnownedWindow {
         self.set_ime_position_physical(x, y);
     }
 
+    #[inline]
+    pub fn request_user_attention(&self, request_type: Option<UserAttentionType>) {
+        let mut wm_hints = self
+            .xconn
+            .get_wm_hints(self.xwindow)
+            .expect("`XGetWMHints` failed");
+        if request_type.is_some() {
+            (*wm_hints).flags |= ffi::XUrgencyHint;
+        } else {
+            (*wm_hints).flags &= !ffi::XUrgencyHint;
+        }
+        self.xconn
+            .set_wm_hints(self.xwindow, wm_hints)
+            .flush()
+            .expect("Failed to set urgency hint");
+    }
+
     #[inline]
     pub fn id(&self) -> WindowId {
         WindowId(self.xwindow)
@@ -1311,10 +1313,7 @@ impl UnownedWindow {
 
     #[inline]
     pub fn request_redraw(&self) {
-        self.pending_redraws
-            .lock()
-            .unwrap()
-            .insert(WindowId(self.xwindow));
+        self.redraw_sender.send(WindowId(self.xwindow)).unwrap();
     }
 
     #[inline]

src/platform_impl/macos/app_state.rs

@@ -92,6 +92,7 @@ impl<T> EventHandler for EventLoopHandler<T> {
 struct Handler {
     ready: AtomicBool,
     in_callback: AtomicBool,
+    dialog_is_closing: AtomicBool,
     control_flow: Mutex<ControlFlow>,
     control_flow_prev: Mutex<ControlFlow>,
     start_time: Mutex<Option<Instant>>,
@@ -223,6 +224,8 @@ impl Handler {
     }
 }
 
+pub static INTERRUPT_EVENT_LOOP_EXIT: AtomicBool = AtomicBool::new(false);
+
 pub enum AppState {}
 
 impl AppState {
@@ -336,29 +339,51 @@ impl AppState {
         }
         if HANDLER.should_exit() {
             unsafe {
-                let _: () = msg_send![NSApp(), stop: nil];
-
-                let pool = NSAutoreleasePool::new(nil);
-
-                let windows: id = msg_send![NSApp(), windows];
+                let app: id = NSApp();
+                let windows: id = msg_send![app, windows];
                 let window: id = msg_send![windows, objectAtIndex:0];
+                let window_count: usize = msg_send![windows, count];
                 assert_ne!(window, nil);
 
-                let dummy_event: id = msg_send![class!(NSEvent),
-                    otherEventWithType: NSApplicationDefined
-                    location: NSPoint::new(0.0, 0.0)
-                    modifierFlags: 0
-                    timestamp: 0
-                    windowNumber: 0
-                    context: nil
-                    subtype: 0
-                    data1: 0
-                    data2: 0
-                ];
-                // To stop event loop immediately, we need to post some event here.
-                let _: () = msg_send![window, postEvent: dummy_event atStart: YES];
+                let dialog_open = if window_count > 1 {
+                    let dialog: id = msg_send![windows, lastObject];
+                    let is_main_window: bool = msg_send![dialog, isMainWindow];
+                    msg_send![dialog, isVisible] && !is_main_window
+                } else {
+                    false
+                };
 
+                let dialog_is_closing = HANDLER.dialog_is_closing.load(Ordering::SeqCst);
+                let pool = NSAutoreleasePool::new(nil);
+                if !INTERRUPT_EVENT_LOOP_EXIT.load(Ordering::SeqCst)
+                    && !dialog_open
+                    && !dialog_is_closing
+                {
+                    let _: () = msg_send![app, stop: nil];
+
+                    let dummy_event: id = msg_send![class!(NSEvent),
+                        otherEventWithType: NSApplicationDefined
+                        location: NSPoint::new(0.0, 0.0)
+                        modifierFlags: 0
+                        timestamp: 0
+                        windowNumber: 0
+                        context: nil
+                        subtype: 0
+                        data1: 0
+                        data2: 0
+                    ];
+                    // To stop event loop immediately, we need to post some event here.
+                    let _: () = msg_send![window, postEvent: dummy_event atStart: YES];
+                }
                 pool.drain();
+
+                let window_has_focus = msg_send![window, isKeyWindow];
+                if !dialog_open && window_has_focus && dialog_is_closing {
+                    HANDLER.dialog_is_closing.store(false, Ordering::SeqCst);
+                }
+                if dialog_open {
+                    HANDLER.dialog_is_closing.store(true, Ordering::SeqCst);
+                }
             };
         }
         HANDLER.update_start_time();

src/platform_impl/macos/event.rs

@@ -156,20 +156,20 @@ pub fn scancode_to_keycode(scancode: c_ushort) -> Option<VirtualKeyCode> {
         0x3e => VirtualKeyCode::RControl,
         //0x3f => Fn key,
         0x40 => VirtualKeyCode::F17,
-        0x41 => VirtualKeyCode::Decimal,
+        0x41 => VirtualKeyCode::NumpadDecimal,
         //0x42 -> unkown,
-        0x43 => VirtualKeyCode::Multiply,
+        0x43 => VirtualKeyCode::NumpadMultiply,
         //0x44 => unkown,
-        0x45 => VirtualKeyCode::Add,
+        0x45 => VirtualKeyCode::NumpadAdd,
         //0x46 => unkown,
         0x47 => VirtualKeyCode::Numlock,
         //0x48 => KeypadClear,
         0x49 => VirtualKeyCode::VolumeUp,
         0x4a => VirtualKeyCode::VolumeDown,
-        0x4b => VirtualKeyCode::Divide,
+        0x4b => VirtualKeyCode::NumpadDivide,
         0x4c => VirtualKeyCode::NumpadEnter,
         //0x4d => unkown,
-        0x4e => VirtualKeyCode::Subtract,
+        0x4e => VirtualKeyCode::NumpadSubtract,
         0x4f => VirtualKeyCode::F18,
         0x50 => VirtualKeyCode::F19,
         0x51 => VirtualKeyCode::NumpadEquals,

src/platform_impl/macos/event_loop.rs

@@ -12,6 +12,7 @@ use cocoa::{
 use crate::{
     event::Event,
     event_loop::{ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootWindowTarget},
+    monitor::MonitorHandle as RootMonitorHandle,
     platform_impl::platform::{
         app::APP_CLASS,
         app_delegate::APP_DELEGATE_CLASS,
@@ -34,6 +35,19 @@ impl<T> Default for EventLoopWindowTarget<T> {
     }
 }
 
+impl<T: 'static> EventLoopWindowTarget<T> {
+    #[inline]
+    pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
+        monitor::available_monitors()
+    }
+
+    #[inline]
+    pub fn primary_monitor(&self) -> Option<RootMonitorHandle> {
+        let monitor = monitor::primary_monitor();
+        Some(RootMonitorHandle { inner: monitor })
+    }
+}
+
 pub struct EventLoop<T: 'static> {
     window_target: Rc<RootWindowTarget<T>>,
     _delegate: IdRef,
@@ -68,16 +82,6 @@ impl<T> EventLoop<T> {
         }
     }
 
-    #[inline]
-    pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
-        monitor::available_monitors()
-    }
-
-    #[inline]
-    pub fn primary_monitor(&self) -> MonitorHandle {
-        monitor::primary_monitor()
-    }
-
     pub fn window_target(&self) -> &RootWindowTarget<T> {
         &self.window_target
     }
@@ -117,6 +121,14 @@ pub struct Proxy<T> {
 
 unsafe impl<T: Send> Send for Proxy<T> {}
 
+impl<T> Drop for Proxy<T> {
+    fn drop(&mut self) {
+        unsafe {
+            CFRelease(self.source as _);
+        }
+    }
+}
+
 impl<T> Clone for Proxy<T> {
     fn clone(&self) -> Self {
         Proxy::new(self.sender.clone())

src/platform_impl/macos/mod.rs

@@ -25,6 +25,8 @@ use crate::{
     error::OsError as RootOsError, event::DeviceId as RootDeviceId, window::WindowAttributes,
 };
 
+pub(crate) use crate::icon::NoIcon as PlatformIcon;
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId;
 

src/platform_impl/macos/util/async.rs

@@ -10,6 +10,7 @@ use cocoa::{
 };
 use dispatch::Queue;
 use objc::rc::autoreleasepool;
+use objc::runtime::NO;
 
 use crate::{
     dpi::LogicalSize,
@@ -167,7 +168,7 @@ pub unsafe fn set_maximized_async(
                 } else {
                     shared_state_lock.saved_standard_frame()
                 };
-                ns_window.setFrame_display_(new_rect, 0);
+                ns_window.setFrame_display_(new_rect, NO);
             }
 
             trace!("Unlocked shared state in `set_maximized`");

src/platform_impl/macos/view.rs

@@ -50,13 +50,13 @@ impl Default for CursorState {
     }
 }
 
-struct ViewState {
+pub(super) struct ViewState {
     ns_window: id,
     pub cursor_state: Arc<Mutex<CursorState>>,
     ime_spot: Option<(f64, f64)>,
     raw_characters: Option<String>,
     is_key_down: bool,
-    modifiers: ModifiersState,
+    pub(super) modifiers: ModifiersState,
     tracking_rect: Option<NSInteger>,
 }
 
@@ -383,8 +383,13 @@ extern "C" fn reset_cursor_rects(this: &Object, _sel: Sel) {
     }
 }
 
-extern "C" fn has_marked_text(_this: &Object, _sel: Sel) -> BOOL {
-    YES
+extern "C" fn has_marked_text(this: &Object, _sel: Sel) -> BOOL {
+    unsafe {
+        trace!("Triggered `hasMarkedText`");
+        let marked_text: id = *this.get_ivar("markedText");
+        trace!("Completed `hasMarkedText`");
+        (marked_text.length() > 0) as BOOL
+    }
 }
 
 extern "C" fn marked_range(this: &Object, _sel: Sel) -> NSRange {
@@ -618,6 +623,19 @@ fn retrieve_keycode(event: id) -> Option<VirtualKeyCode> {
     })
 }
 
+// Update `state.modifiers` if `event` has something different
+fn update_potentially_stale_modifiers(state: &mut ViewState, event: id) {
+    let event_modifiers = event_mods(event);
+    if state.modifiers != event_modifiers {
+        state.modifiers = event_modifiers;
+
+        AppState::queue_event(EventWrapper::StaticEvent(Event::WindowEvent {
+            window_id: WindowId(get_window_id(state.ns_window)),
+            event: WindowEvent::ModifiersChanged(state.modifiers),
+        }));
+    }
+}
+
 extern "C" fn key_down(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `keyDown`");
     unsafe {
@@ -633,6 +651,8 @@ extern "C" fn key_down(this: &Object, _sel: Sel, event: id) {
 
         let is_repeat = msg_send![event, isARepeat];
 
+        update_potentially_stale_modifiers(state, event);
+
         #[allow(deprecated)]
         let window_event = Event::WindowEvent {
             window_id,
@@ -686,6 +706,8 @@ extern "C" fn key_up(this: &Object, _sel: Sel, event: id) {
         let scancode = get_scancode(event) as u32;
         let virtual_keycode = retrieve_keycode(event);
 
+        update_potentially_stale_modifiers(state, event);
+
         #[allow(deprecated)]
         let window_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.ns_window)),
@@ -750,16 +772,18 @@ extern "C" fn flags_changed(this: &Object, _sel: Sel, event: id) {
             events.push_back(window_event);
         }
 
+        let window_id = WindowId(get_window_id(state.ns_window));
+
         for event in events {
             AppState::queue_event(EventWrapper::StaticEvent(Event::WindowEvent {
-                window_id: WindowId(get_window_id(state.ns_window)),
+                window_id,
                 event,
             }));
         }
 
-        AppState::queue_event(EventWrapper::StaticEvent(Event::DeviceEvent {
-            device_id: DEVICE_ID,
-            event: DeviceEvent::ModifiersChanged(state.modifiers),
+        AppState::queue_event(EventWrapper::StaticEvent(Event::WindowEvent {
+            window_id,
+            event: WindowEvent::ModifiersChanged(state.modifiers),
         }));
     }
     trace!("Completed `flagsChanged`");
@@ -801,6 +825,8 @@ extern "C" fn cancel_operation(this: &Object, _sel: Sel, _sender: id) {
 
         let event: id = msg_send![NSApp(), currentEvent];
 
+        update_potentially_stale_modifiers(state, event);
+
         #[allow(deprecated)]
         let window_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.ns_window)),
@@ -826,6 +852,8 @@ fn mouse_click(this: &Object, event: id, button: MouseButton, button_state: Elem
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);
 
+        update_potentially_stale_modifiers(state, event);
+
         let window_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.ns_window)),
             event: WindowEvent::MouseInput {
@@ -841,26 +869,32 @@ fn mouse_click(this: &Object, event: id, button: MouseButton, button_state: Elem
 }
 
 extern "C" fn mouse_down(this: &Object, _sel: Sel, event: id) {
+    mouse_motion(this, event);
     mouse_click(this, event, MouseButton::Left, ElementState::Pressed);
 }
 
 extern "C" fn mouse_up(this: &Object, _sel: Sel, event: id) {
+    mouse_motion(this, event);
     mouse_click(this, event, MouseButton::Left, ElementState::Released);
 }
 
 extern "C" fn right_mouse_down(this: &Object, _sel: Sel, event: id) {
+    mouse_motion(this, event);
     mouse_click(this, event, MouseButton::Right, ElementState::Pressed);
 }
 
 extern "C" fn right_mouse_up(this: &Object, _sel: Sel, event: id) {
+    mouse_motion(this, event);
     mouse_click(this, event, MouseButton::Right, ElementState::Released);
 }
 
 extern "C" fn other_mouse_down(this: &Object, _sel: Sel, event: id) {
+    mouse_motion(this, event);
     mouse_click(this, event, MouseButton::Middle, ElementState::Pressed);
 }
 
 extern "C" fn other_mouse_up(this: &Object, _sel: Sel, event: id) {
+    mouse_motion(this, event);
     mouse_click(this, event, MouseButton::Middle, ElementState::Released);
 }
 
@@ -881,14 +915,19 @@ fn mouse_motion(this: &Object, event: id) {
             || view_point.x > view_rect.size.width
             || view_point.y > view_rect.size.height
         {
-            // Point is outside of the client area (view)
-            return;
+            let mouse_buttons_down: NSInteger = msg_send![class!(NSEvent), pressedMouseButtons];
+            if mouse_buttons_down == 0 {
+                // Point is outside of the client area (view) and no buttons are pressed
+                return;
+            }
         }
 
         let x = view_point.x as f64;
         let y = view_rect.size.height as f64 - view_point.y as f64;
         let logical_position = LogicalPosition::new(x, y);
 
+        update_potentially_stale_modifiers(state, event);
+
         let window_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.ns_window)),
             event: WindowEvent::CursorMoved {
@@ -918,7 +957,7 @@ extern "C" fn other_mouse_dragged(this: &Object, _sel: Sel, event: id) {
     mouse_motion(this, event);
 }
 
-extern "C" fn mouse_entered(this: &Object, _sel: Sel, event: id) {
+extern "C" fn mouse_entered(this: &Object, _sel: Sel, _event: id) {
     trace!("Triggered `mouseEntered`");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
@@ -932,7 +971,6 @@ extern "C" fn mouse_entered(this: &Object, _sel: Sel, event: id) {
         };
 
         AppState::queue_event(EventWrapper::StaticEvent(enter_event));
-        mouse_motion(this, event);
     }
     trace!("Completed `mouseEntered`");
 }
@@ -957,11 +995,19 @@ extern "C" fn mouse_exited(this: &Object, _sel: Sel, _event: id) {
 
 extern "C" fn scroll_wheel(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `scrollWheel`");
+
+    mouse_motion(this, event);
+
     unsafe {
+        let state_ptr: *mut c_void = *this.get_ivar("winitState");
+        let state = &mut *(state_ptr as *mut ViewState);
+
         let delta = {
-            let (x, y) = (event.scrollingDeltaX(), event.scrollingDeltaY());
+            // macOS horizontal sign convention is the inverse of winit.
+            let (x, y) = (event.scrollingDeltaX() * -1.0, event.scrollingDeltaY());
             if event.hasPreciseScrollingDeltas() == YES {
-                MouseScrollDelta::PixelDelta((x as f64, y as f64).into())
+                let delta = LogicalPosition::new(x, y).to_physical(state.get_scale_factor());
+                MouseScrollDelta::PixelDelta(delta)
             } else {
                 MouseScrollDelta::LineDelta(x as f32, y as f32)
             }
@@ -982,6 +1028,8 @@ extern "C" fn scroll_wheel(this: &Object, _sel: Sel, event: id) {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);
 
+        update_potentially_stale_modifiers(state, event);
+
         let window_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.ns_window)),
             event: WindowEvent::MouseWheel {
@@ -1000,6 +1048,9 @@ extern "C" fn scroll_wheel(this: &Object, _sel: Sel, event: id) {
 
 extern "C" fn pressure_change_with_event(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `pressureChangeWithEvent`");
+
+    mouse_motion(this, event);
+
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);

src/platform_impl/macos/window.rs

@@ -16,9 +16,10 @@ use crate::{
     error::{ExternalError, NotSupportedError, OsError as RootOsError},
     icon::Icon,
     monitor::{MonitorHandle as RootMonitorHandle, VideoMode as RootVideoMode},
-    platform::macos::{ActivationPolicy, RequestUserAttentionType, WindowExtMacOS},
+    platform::macos::{ActivationPolicy, WindowExtMacOS},
     platform_impl::platform::{
         app_state::AppState,
+        app_state::INTERRUPT_EVENT_LOOP_EXIT,
         ffi,
         monitor::{self, MonitorHandle, VideoMode},
         util::{self, IdRef},
@@ -27,7 +28,9 @@ use crate::{
         window_delegate::new_delegate,
         OsError,
     },
-    window::{CursorIcon, Fullscreen, WindowAttributes, WindowId as RootWindowId},
+    window::{
+        CursorIcon, Fullscreen, UserAttentionType, WindowAttributes, WindowId as RootWindowId,
+    },
 };
 use cocoa::{
     appkit::{
@@ -59,7 +62,7 @@ pub fn get_window_id(window_cocoa_id: id) -> Id {
     Id(window_cocoa_id as *const Object as _)
 }
 
-#[derive(Clone, Default)]
+#[derive(Clone)]
 pub struct PlatformSpecificWindowBuilderAttributes {
     pub activation_policy: ActivationPolicy,
     pub movable_by_window_background: bool,
@@ -70,6 +73,25 @@ pub struct PlatformSpecificWindowBuilderAttributes {
     pub fullsize_content_view: bool,
     pub resize_increments: Option<LogicalSize<f64>>,
     pub disallow_hidpi: bool,
+    pub has_shadow: bool,
+}
+
+impl Default for PlatformSpecificWindowBuilderAttributes {
+    #[inline]
+    fn default() -> Self {
+        Self {
+            activation_policy: Default::default(),
+            movable_by_window_background: false,
+            titlebar_transparent: false,
+            title_hidden: false,
+            titlebar_hidden: false,
+            titlebar_buttons_hidden: false,
+            fullsize_content_view: false,
+            resize_increments: None,
+            disallow_hidpi: false,
+            has_shadow: true,
+        }
+    }
 }
 
 fn create_app(activation_policy: ActivationPolicy) -> Option<id> {
@@ -122,13 +144,14 @@ fn create_window(
     unsafe {
         let pool = NSAutoreleasePool::new(nil);
         let screen = match attrs.fullscreen {
-            Some(Fullscreen::Borderless(RootMonitorHandle { inner: ref monitor }))
+            Some(Fullscreen::Borderless(Some(RootMonitorHandle { inner: ref monitor })))
             | Some(Fullscreen::Exclusive(RootVideoMode {
                 video_mode: VideoMode { ref monitor, .. },
             })) => {
                 let monitor_screen = monitor.ns_screen();
                 Some(monitor_screen.unwrap_or(appkit::NSScreen::mainScreen(nil)))
             }
+            Some(Fullscreen::Borderless(None)) => Some(appkit::NSScreen::mainScreen(nil)),
             None => None,
         };
         let frame = match screen {
@@ -223,6 +246,10 @@ fn create_window(
                 }
             }
 
+            if !pl_attrs.has_shadow {
+                ns_window.setHasShadow_(NO);
+            }
+
             ns_window.center();
             ns_window
         });
@@ -340,7 +367,7 @@ impl UnownedWindow {
 
         let input_context = unsafe { util::create_input_context(*ns_view) };
 
-        let dpi_factor = unsafe { NSWindow::backingScaleFactor(*ns_window) as f64 };
+        let scale_factor = unsafe { NSWindow::backingScaleFactor(*ns_window) as f64 };
 
         unsafe {
             if win_attribs.transparent {
@@ -350,11 +377,11 @@ impl UnownedWindow {
 
             ns_app.activateIgnoringOtherApps_(YES);
             win_attribs.min_inner_size.map(|dim| {
-                let logical_dim = dim.to_logical(dpi_factor);
+                let logical_dim = dim.to_logical(scale_factor);
                 set_min_inner_size(*ns_window, logical_dim)
             });
             win_attribs.max_inner_size.map(|dim| {
-                let logical_dim = dim.to_logical(dpi_factor);
+                let logical_dim = dim.to_logical(scale_factor);
                 set_max_inner_size(*ns_window, logical_dim)
             });
 
@@ -378,7 +405,7 @@ impl UnownedWindow {
         let decorations = win_attribs.decorations;
         let inner_rect = win_attribs
             .inner_size
-            .map(|size| size.to_physical(dpi_factor));
+            .map(|size| size.to_physical(scale_factor));
 
         let window = Arc::new(UnownedWindow {
             ns_view,
@@ -450,8 +477,8 @@ impl UnownedWindow {
             frame_rect.origin.x as f64,
             util::bottom_left_to_top_left(frame_rect),
         );
-        let dpi_factor = self.scale_factor();
-        Ok(position.to_physical(dpi_factor))
+        let scale_factor = self.scale_factor();
+        Ok(position.to_physical(scale_factor))
     }
 
     pub fn inner_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
@@ -462,13 +489,13 @@ impl UnownedWindow {
             content_rect.origin.x as f64,
             util::bottom_left_to_top_left(content_rect),
         );
-        let dpi_factor = self.scale_factor();
-        Ok(position.to_physical(dpi_factor))
+        let scale_factor = self.scale_factor();
+        Ok(position.to_physical(scale_factor))
     }
 
     pub fn set_outer_position(&self, position: Position) {
-        let dpi_factor = self.scale_factor();
-        let position = position.to_logical(dpi_factor);
+        let scale_factor = self.scale_factor();
+        let position = position.to_logical(scale_factor);
         let dummy = NSRect::new(
             NSPoint::new(
                 position.x,
@@ -488,8 +515,8 @@ impl UnownedWindow {
         let view_frame = unsafe { NSView::frame(*self.ns_view) };
         let logical: LogicalSize<f64> =
             (view_frame.size.width as f64, view_frame.size.height as f64).into();
-        let dpi_factor = self.scale_factor();
-        logical.to_physical(dpi_factor)
+        let scale_factor = self.scale_factor();
+        logical.to_physical(scale_factor)
     }
 
     #[inline]
@@ -497,15 +524,15 @@ impl UnownedWindow {
         let view_frame = unsafe { NSWindow::frame(*self.ns_window) };
         let logical: LogicalSize<f64> =
             (view_frame.size.width as f64, view_frame.size.height as f64).into();
-        let dpi_factor = self.scale_factor();
-        logical.to_physical(dpi_factor)
+        let scale_factor = self.scale_factor();
+        logical.to_physical(scale_factor)
     }
 
     #[inline]
     pub fn set_inner_size(&self, size: Size) {
         unsafe {
-            let dpi_factor = self.scale_factor();
-            util::set_content_size_async(*self.ns_window, size.to_logical(dpi_factor));
+            let scale_factor = self.scale_factor();
+            util::set_content_size_async(*self.ns_window, size.to_logical(scale_factor));
         }
     }
 
@@ -515,8 +542,8 @@ impl UnownedWindow {
                 width: 0.0,
                 height: 0.0,
             }));
-            let dpi_factor = self.scale_factor();
-            set_min_inner_size(*self.ns_window, dimensions.to_logical(dpi_factor));
+            let scale_factor = self.scale_factor();
+            set_min_inner_size(*self.ns_window, dimensions.to_logical(scale_factor));
         }
     }
 
@@ -526,8 +553,8 @@ impl UnownedWindow {
                 width: std::f32::MAX as f64,
                 height: std::f32::MAX as f64,
             }));
-            let dpi_factor = self.scale_factor();
-            set_max_inner_size(*self.ns_window, dimensions.to_logical(dpi_factor));
+            let scale_factor = self.scale_factor();
+            set_max_inner_size(*self.ns_window, dimensions.to_logical(scale_factor));
         }
     }
 
@@ -594,9 +621,9 @@ impl UnownedWindow {
     #[inline]
     pub fn set_cursor_position(&self, cursor_position: Position) -> Result<(), ExternalError> {
         let physical_window_position = self.inner_position().unwrap();
-        let dpi_factor = self.scale_factor();
-        let window_position = physical_window_position.to_logical::<CGFloat>(dpi_factor);
-        let logical_cursor_position = cursor_position.to_logical::<CGFloat>(dpi_factor);
+        let scale_factor = self.scale_factor();
+        let window_position = physical_window_position.to_logical::<CGFloat>(scale_factor);
+        let logical_cursor_position = cursor_position.to_logical::<CGFloat>(scale_factor);
         let point = appkit::CGPoint {
             x: logical_cursor_position.x + window_position.x,
             y: logical_cursor_position.y + window_position.y,
@@ -628,7 +655,7 @@ impl UnownedWindow {
             self.set_style_mask_async(curr_mask);
         }
 
-        is_zoomed != 0
+        is_zoomed != NO
     }
 
     fn saved_style(&self, shared_state: &mut SharedState) -> NSWindowStyleMask {
@@ -731,10 +758,15 @@ impl UnownedWindow {
         // does not take a screen parameter, but uses the current screen)
         if let Some(ref fullscreen) = fullscreen {
             let new_screen = match fullscreen {
-                Fullscreen::Borderless(RootMonitorHandle { inner: ref monitor }) => monitor,
+                Fullscreen::Borderless(borderless) => {
+                    let RootMonitorHandle { inner: monitor } = borderless
+                        .clone()
+                        .unwrap_or_else(|| self.current_monitor_inner());
+                    monitor
+                }
                 Fullscreen::Exclusive(RootVideoMode {
                     video_mode: VideoMode { ref monitor, .. },
-                }) => monitor,
+                }) => monitor.clone(),
             }
             .ns_screen()
             .unwrap();
@@ -820,6 +852,8 @@ impl UnownedWindow {
         shared_state_lock.fullscreen = fullscreen.clone();
         trace!("Unlocked shared state in `set_fullscreen`");
 
+        INTERRUPT_EVENT_LOOP_EXIT.store(true, Ordering::SeqCst);
+
         match (&old_fullscreen, &fullscreen) {
             (&None, &Some(_)) => unsafe {
                 util::toggle_full_screen_async(
@@ -865,7 +899,7 @@ impl UnownedWindow {
             ) => unsafe {
                 util::restore_display_mode_async(video_mode.monitor().inner.native_identifier());
             },
-            _ => (),
+            _ => INTERRUPT_EVENT_LOOP_EXIT.store(false, Ordering::SeqCst),
         }
     }
 
@@ -933,8 +967,8 @@ impl UnownedWindow {
 
     #[inline]
     pub fn set_ime_position(&self, spot: Position) {
-        let dpi_factor = self.scale_factor();
-        let logical_spot = spot.to_logical(dpi_factor);
+        let scale_factor = self.scale_factor();
+        let logical_spot = spot.to_logical(scale_factor);
         unsafe {
             view::set_ime_position(
                 *self.ns_view,
@@ -946,7 +980,21 @@ impl UnownedWindow {
     }
 
     #[inline]
-    pub fn current_monitor(&self) -> RootMonitorHandle {
+    pub fn request_user_attention(&self, request_type: Option<UserAttentionType>) {
+        let ns_request_type = request_type.map(|ty| match ty {
+            UserAttentionType::Critical => NSRequestUserAttentionType::NSCriticalRequest,
+            UserAttentionType::Informational => NSRequestUserAttentionType::NSInformationalRequest,
+        });
+        unsafe {
+            if let Some(ty) = ns_request_type {
+                NSApp().requestUserAttention_(ty);
+            }
+        }
+    }
+
+    #[inline]
+    // Allow directly accessing the current monitor internally without unwrapping.
+    pub(crate) fn current_monitor_inner(&self) -> RootMonitorHandle {
         unsafe {
             let screen: id = msg_send![*self.ns_window, screen];
             let desc = NSScreen::deviceDescription(screen);
@@ -959,14 +1007,20 @@ impl UnownedWindow {
         }
     }
 
+    #[inline]
+    pub fn current_monitor(&self) -> Option<RootMonitorHandle> {
+        Some(self.current_monitor_inner())
+    }
+
     #[inline]
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         monitor::available_monitors()
     }
 
     #[inline]
-    pub fn primary_monitor(&self) -> MonitorHandle {
-        monitor::primary_monitor()
+    pub fn primary_monitor(&self) -> Option<RootMonitorHandle> {
+        let monitor = monitor::primary_monitor();
+        Some(RootMonitorHandle { inner: monitor })
     }
 
     #[inline]
@@ -991,18 +1045,6 @@ impl WindowExtMacOS for UnownedWindow {
         *self.ns_view as *mut _
     }
 
-    #[inline]
-    fn request_user_attention(&self, request_type: RequestUserAttentionType) {
-        unsafe {
-            NSApp().requestUserAttention_(match request_type {
-                RequestUserAttentionType::Critical => NSRequestUserAttentionType::NSCriticalRequest,
-                RequestUserAttentionType::Informational => {
-                    NSRequestUserAttentionType::NSInformationalRequest
-                }
-            });
-        }
-    }
-
     #[inline]
     fn simple_fullscreen(&self) -> bool {
         let shared_state_lock = self.shared_state.lock().unwrap();
@@ -1028,7 +1070,11 @@ impl WindowExtMacOS for UnownedWindow {
 
             if fullscreen {
                 // Remember the original window's settings
-                shared_state_lock.standard_frame = Some(NSWindow::frame(*self.ns_window));
+                // Exclude title bar
+                shared_state_lock.standard_frame = Some(NSWindow::contentRectForFrameRect_(
+                    *self.ns_window,
+                    NSWindow::frame(*self.ns_window),
+                ));
                 shared_state_lock.saved_style = Some(self.ns_window.styleMask());
                 shared_state_lock.save_presentation_opts = Some(app.presentationOptions_());
 
@@ -1087,6 +1133,19 @@ impl WindowExtMacOS for UnownedWindow {
             }
         }
     }
+
+    #[inline]
+    fn has_shadow(&self) -> bool {
+        unsafe { self.ns_window.hasShadow() == YES }
+    }
+
+    #[inline]
+    fn set_has_shadow(&self, has_shadow: bool) {
+        unsafe {
+            self.ns_window
+                .setHasShadow_(if has_shadow { YES } else { NO })
+        }
+    }
 }
 
 impl Drop for UnownedWindow {
@@ -1112,14 +1171,14 @@ unsafe fn set_min_inner_size<V: NSWindow + Copy>(window: V, mut min_size: Logica
     // If necessary, resize the window to match constraint
     if current_rect.size.width < min_size.width {
         current_rect.size.width = min_size.width;
-        window.setFrame_display_(current_rect, 0)
+        window.setFrame_display_(current_rect, NO)
     }
     if current_rect.size.height < min_size.height {
         // The origin point of a rectangle is at its bottom left in Cocoa.
         // To ensure the window's top-left point remains the same:
         current_rect.origin.y += current_rect.size.height - min_size.height;
         current_rect.size.height = min_size.height;
-        window.setFrame_display_(current_rect, 0)
+        window.setFrame_display_(current_rect, NO)
     }
 }
 
@@ -1136,13 +1195,13 @@ unsafe fn set_max_inner_size<V: NSWindow + Copy>(window: V, mut max_size: Logica
     // If necessary, resize the window to match constraint
     if current_rect.size.width > max_size.width {
         current_rect.size.width = max_size.width;
-        window.setFrame_display_(current_rect, 0)
+        window.setFrame_display_(current_rect, NO)
     }
     if current_rect.size.height > max_size.height {
         // The origin point of a rectangle is at its bottom left in Cocoa.
         // To ensure the window's top-left point remains the same:
         current_rect.origin.y += current_rect.size.height - max_size.height;
         current_rect.size.height = max_size.height;
-        window.setFrame_display_(current_rect, 0)
+        window.setFrame_display_(current_rect, NO)
     }
 }

src/platform_impl/macos/window_delegate.rs

@@ -1,7 +1,7 @@
 use std::{
     f64,
     os::raw::c_void,
-    sync::{Arc, Weak},
+    sync::{atomic::Ordering, Arc, Weak},
 };
 
 use cocoa::{
@@ -15,12 +15,14 @@ use objc::{
 };
 
 use crate::{
-    dpi::LogicalSize,
-    event::{Event, WindowEvent},
+    dpi::{LogicalPosition, LogicalSize},
+    event::{Event, ModifiersState, WindowEvent},
     platform_impl::platform::{
         app_state::AppState,
+        app_state::INTERRUPT_EVENT_LOOP_EXIT,
         event::{EventProxy, EventWrapper},
         util::{self, IdRef},
+        view::ViewState,
         window::{get_window_id, UnownedWindow},
     },
     window::{Fullscreen, WindowId},
@@ -43,7 +45,7 @@ pub struct WindowDelegateState {
     previous_position: Option<(f64, f64)>,
 
     // Used to prevent redundant events.
-    previous_dpi_factor: f64,
+    previous_scale_factor: f64,
 }
 
 impl WindowDelegateState {
@@ -55,7 +57,7 @@ impl WindowDelegateState {
             window: Arc::downgrade(&window),
             initial_fullscreen,
             previous_position: None,
-            previous_dpi_factor: scale_factor,
+            previous_scale_factor: scale_factor,
         };
 
         if scale_factor != 1.0 {
@@ -82,11 +84,11 @@ impl WindowDelegateState {
 
     pub fn emit_static_scale_factor_changed_event(&mut self) {
         let scale_factor = self.get_scale_factor();
-        if scale_factor == self.previous_dpi_factor {
+        if scale_factor == self.previous_scale_factor {
             return ();
         };
 
-        self.previous_dpi_factor = scale_factor;
+        self.previous_scale_factor = scale_factor;
         let wrapper = EventWrapper::EventProxy(EventProxy::DpiChangedProxy {
             ns_window: IdRef::retain(*self.ns_window),
             suggested_size: self.view_size(),
@@ -110,7 +112,9 @@ impl WindowDelegateState {
         let moved = self.previous_position != Some((x, y));
         if moved {
             self.previous_position = Some((x, y));
-            self.emit_event(WindowEvent::Moved((x, y).into()));
+            let scale_factor = self.get_scale_factor();
+            let physical_pos = LogicalPosition::<f64>::from((x, y)).to_physical(scale_factor);
+            self.emit_event(WindowEvent::Moved(physical_pos));
         }
     }
 
@@ -319,6 +323,29 @@ extern "C" fn window_did_become_key(this: &Object, _: Sel, _: id) {
 extern "C" fn window_did_resign_key(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidResignKey:`");
     with_state(this, |state| {
+        // It happens rather often, e.g. when the user is Cmd+Tabbing, that the
+        // NSWindowDelegate will receive a didResignKey event despite no event
+        // being received when the modifiers are released.  This is because
+        // flagsChanged events are received by the NSView instead of the
+        // NSWindowDelegate, and as a result a tracked modifiers state can quite
+        // easily fall out of synchrony with reality.  This requires us to emit
+        // a synthetic ModifiersChanged event when we lose focus.
+        //
+        // Here we (very unsafely) acquire the winitState (a ViewState) from the
+        // Object referenced by state.ns_view (an IdRef, which is dereferenced
+        // to an id)
+        let view_state: &mut ViewState = unsafe {
+            let ns_view: &Object = (*state.ns_view).as_ref().expect("failed to deref");
+            let state_ptr: *mut c_void = *ns_view.get_ivar("winitState");
+            &mut *(state_ptr as *mut ViewState)
+        };
+
+        // Both update the state and emit a ModifiersChanged event.
+        if !view_state.modifiers.is_empty() {
+            view_state.modifiers = ModifiersState::empty();
+            state.emit_event(WindowEvent::ModifiersChanged(view_state.modifiers));
+        }
+
         state.emit_event(WindowEvent::Focused(false));
     });
     trace!("Completed `windowDidResignKey:`");
@@ -405,6 +432,9 @@ extern "C" fn dragging_exited(this: &Object, _: Sel, _: id) {
 /// Invoked when before enter fullscreen
 extern "C" fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowWillEnterFullscreen:`");
+
+    INTERRUPT_EVENT_LOOP_EXIT.store(true, Ordering::SeqCst);
+
     with_state(this, |state| {
         state.with_window(|window| {
             trace!("Locked shared state in `window_will_enter_fullscreen`");
@@ -422,7 +452,8 @@ extern "C" fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
                 // Otherwise, we must've reached fullscreen by the user clicking
                 // on the green fullscreen button. Update state!
                 None => {
-                    shared_state.fullscreen = Some(Fullscreen::Borderless(window.current_monitor()))
+                    let current_monitor = Some(window.current_monitor_inner());
+                    shared_state.fullscreen = Some(Fullscreen::Borderless(current_monitor))
                 }
             }
             shared_state.in_fullscreen_transition = true;
@@ -435,6 +466,9 @@ extern "C" fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
 /// Invoked when before exit fullscreen
 extern "C" fn window_will_exit_fullscreen(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowWillExitFullScreen:`");
+
+    INTERRUPT_EVENT_LOOP_EXIT.store(true, Ordering::SeqCst);
+
     with_state(this, |state| {
         state.with_window(|window| {
             trace!("Locked shared state in `window_will_exit_fullscreen`");
@@ -468,6 +502,8 @@ extern "C" fn window_will_use_fullscreen_presentation_options(
 
 /// Invoked when entered fullscreen
 extern "C" fn window_did_enter_fullscreen(this: &Object, _: Sel, _: id) {
+    INTERRUPT_EVENT_LOOP_EXIT.store(false, Ordering::SeqCst);
+
     trace!("Triggered `windowDidEnterFullscreen:`");
     with_state(this, |state| {
         state.initial_fullscreen = false;
@@ -488,6 +524,8 @@ extern "C" fn window_did_enter_fullscreen(this: &Object, _: Sel, _: id) {
 
 /// Invoked when exited fullscreen
 extern "C" fn window_did_exit_fullscreen(this: &Object, _: Sel, _: id) {
+    INTERRUPT_EVENT_LOOP_EXIT.store(false, Ordering::SeqCst);
+
     trace!("Triggered `windowDidExitFullscreen:`");
     with_state(this, |state| {
         state.with_window(|window| {

src/platform_impl/web/event_loop/mod.rs

@@ -6,11 +6,10 @@ mod window_target;
 pub use self::proxy::Proxy;
 pub use self::window_target::WindowTarget;
 
-use super::{backend, device, monitor, window};
+use super::{backend, device, window};
 use crate::event::Event;
 use crate::event_loop as root;
 
-use std::collections::{vec_deque::IntoIter as VecDequeIter, VecDeque};
 use std::marker::PhantomData;
 
 pub struct EventLoop<T: 'static> {
@@ -27,18 +26,9 @@ impl<T> EventLoop<T> {
         }
     }
 
-    pub fn available_monitors(&self) -> VecDequeIter<monitor::Handle> {
-        VecDeque::new().into_iter()
-    }
-
-    pub fn primary_monitor(&self) -> monitor::Handle {
-        monitor::Handle
-    }
-
     pub fn run<F>(self, mut event_handler: F) -> !
     where
-        F: 'static
-            + FnMut(Event<'static, T>, &root::EventLoopWindowTarget<T>, &mut root::ControlFlow),
+        F: 'static + FnMut(Event<'_, T>, &root::EventLoopWindowTarget<T>, &mut root::ControlFlow),
     {
         let target = root::EventLoopWindowTarget {
             p: self.elw.p.clone(),

src/platform_impl/web/event_loop/runner.rs

@@ -1,4 +1,4 @@
-use super::{backend, state::State};
+use super::{super::ScaleChangeArgs, backend, state::State};
 use crate::event::{Event, StartCause};
 use crate::event_loop as root;
 use crate::window::WindowId;
@@ -9,7 +9,8 @@ use std::{
     clone::Clone,
     collections::{HashSet, VecDeque},
     iter,
-    rc::Rc,
+    ops::Deref,
+    rc::{Rc, Weak},
 };
 
 pub struct Shared<T: 'static>(Rc<Execution<T>>);
@@ -21,50 +22,129 @@ impl<T> Clone for Shared<T> {
 }
 
 pub struct Execution<T: 'static> {
-    runner: RefCell<Option<Runner<T>>>,
+    runner: RefCell<RunnerEnum<T>>,
     events: RefCell<VecDeque<Event<'static, T>>>,
     id: RefCell<u32>,
+    all_canvases: RefCell<Vec<(WindowId, Weak<RefCell<backend::Canvas>>)>>,
     redraw_pending: RefCell<HashSet<WindowId>>,
+    destroy_pending: RefCell<VecDeque<WindowId>>,
+    scale_change_detector: RefCell<Option<backend::ScaleChangeDetector>>,
+    unload_event_handle: RefCell<Option<backend::UnloadEventHandle>>,
+}
+
+enum RunnerEnum<T: 'static> {
+    /// The `EventLoop` is created but not being run.
+    Pending,
+    /// The `EventLoop` is being run.
+    Running(Runner<T>),
+    /// The `EventLoop` is exited after being started with `EventLoop::run`. Since
+    /// `EventLoop::run` takes ownership of the `EventLoop`, we can be certain
+    /// that this event loop will never be run again.
+    Destroyed,
+}
+
+impl<T: 'static> RunnerEnum<T> {
+    fn maybe_runner(&self) -> Option<&Runner<T>> {
+        match self {
+            RunnerEnum::Running(runner) => Some(runner),
+            _ => None,
+        }
+    }
 }
 
 struct Runner<T: 'static> {
     state: State,
-    is_busy: bool,
-    event_handler: Box<dyn FnMut(Event<'static, T>, &mut root::ControlFlow)>,
+    event_handler: Box<dyn FnMut(Event<'_, T>, &mut root::ControlFlow)>,
 }
 
 impl<T: 'static> Runner<T> {
-    pub fn new(event_handler: Box<dyn FnMut(Event<'static, T>, &mut root::ControlFlow)>) -> Self {
+    pub fn new(event_handler: Box<dyn FnMut(Event<'_, T>, &mut root::ControlFlow)>) -> Self {
         Runner {
             state: State::Init,
-            is_busy: false,
             event_handler,
         }
     }
+
+    /// Returns the cooresponding `StartCause` for the current `state`, or `None`
+    /// when in `Exit` state.
+    fn maybe_start_cause(&self) -> Option<StartCause> {
+        Some(match self.state {
+            State::Init => StartCause::Init,
+            State::Poll { .. } => StartCause::Poll,
+            State::Wait { start } => StartCause::WaitCancelled {
+                start,
+                requested_resume: None,
+            },
+            State::WaitUntil { start, end, .. } => StartCause::WaitCancelled {
+                start,
+                requested_resume: Some(end),
+            },
+            State::Exit => return None,
+        })
+    }
+
+    fn handle_single_event(&mut self, event: Event<'_, T>, control: &mut root::ControlFlow) {
+        let is_closed = *control == root::ControlFlow::Exit;
+
+        (self.event_handler)(event, control);
+
+        // Maintain closed state, even if the callback changes it
+        if is_closed {
+            *control = root::ControlFlow::Exit;
+        }
+    }
 }
 
 impl<T: 'static> Shared<T> {
     pub fn new() -> Self {
         Shared(Rc::new(Execution {
-            runner: RefCell::new(None),
+            runner: RefCell::new(RunnerEnum::Pending),
             events: RefCell::new(VecDeque::new()),
             id: RefCell::new(0),
+            all_canvases: RefCell::new(Vec::new()),
             redraw_pending: RefCell::new(HashSet::new()),
+            destroy_pending: RefCell::new(VecDeque::new()),
+            scale_change_detector: RefCell::new(None),
+            unload_event_handle: RefCell::new(None),
         }))
     }
 
+    pub fn add_canvas(&self, id: WindowId, canvas: &Rc<RefCell<backend::Canvas>>) {
+        self.0
+            .all_canvases
+            .borrow_mut()
+            .push((id, Rc::downgrade(canvas)));
+    }
+
+    pub fn notify_destroy_window(&self, id: WindowId) {
+        self.0.destroy_pending.borrow_mut().push_back(id);
+    }
+
     // Set the event callback to use for the event loop runner
     // This the event callback is a fairly thin layer over the user-provided callback that closes
     // over a RootEventLoopWindowTarget reference
     pub fn set_listener(
         &self,
-        event_handler: Box<dyn FnMut(Event<'static, T>, &mut root::ControlFlow)>,
+        event_handler: Box<dyn FnMut(Event<'_, T>, &mut root::ControlFlow)>,
     ) {
-        self.0.runner.replace(Some(Runner::new(event_handler)));
+        {
+            let mut runner = self.0.runner.borrow_mut();
+            assert!(matches!(*runner, RunnerEnum::Pending));
+            *runner = RunnerEnum::Running(Runner::new(event_handler));
+        }
         self.init();
 
         let close_instance = self.clone();
-        backend::on_unload(move || close_instance.handle_unload());
+        *self.0.unload_event_handle.borrow_mut() =
+            Some(backend::on_unload(move || close_instance.handle_unload()));
+    }
+
+    pub(crate) fn set_on_scale_change<F>(&self, handler: F)
+    where
+        F: 'static + FnMut(ScaleChangeArgs),
+    {
+        *self.0.scale_change_detector.borrow_mut() =
+            Some(backend::ScaleChangeDetector::new(handler));
     }
 
     // Generate a strictly increasing ID
@@ -118,18 +198,25 @@ impl<T: 'static> Shared<T> {
         }
         // If we can run the event processing right now, or need to queue this and wait for later
         let mut process_immediately = true;
-        if let Some(ref runner) = &*self.0.runner.borrow() {
-            // If we're currently polling, queue this and wait for the poll() method to be called
-            if let State::Poll { .. } = runner.state {
+        match self.0.runner.try_borrow().as_ref().map(Deref::deref) {
+            Ok(RunnerEnum::Running(ref runner)) => {
+                // If we're currently polling, queue this and wait for the poll() method to be called
+                if let State::Poll { .. } = runner.state {
+                    process_immediately = false;
+                }
+            }
+            Ok(RunnerEnum::Pending) => {
+                // The runner still hasn't been attached: queue this event and wait for it to be
                 process_immediately = false;
             }
-            // If the runner is busy, queue this and wait for it to process it later
-            if runner.is_busy {
+            // Some other code is mutating the runner, which most likely means
+            // the event loop is running and busy. So we queue this event for
+            // it to be processed later.
+            Err(_) => {
                 process_immediately = false;
             }
-        } else {
-            // The runner still hasn't been attached: queue this event and wait for it to be
-            process_immediately = false;
+            // This is unreachable since `self.is_closed() == true`.
+            Ok(RunnerEnum::Destroyed) => unreachable!(),
         }
         if !process_immediately {
             // Queue these events to look at later
@@ -138,25 +225,15 @@ impl<T: 'static> Shared<T> {
         }
         // At this point, we know this is a fresh set of events
         // Now we determine why new events are incoming, and handle the events
-        let start_cause = if let Some(runner) = &*self.0.runner.borrow() {
-            match runner.state {
-                State::Init => StartCause::Init,
-                State::Poll { .. } => StartCause::Poll,
-                State::Wait { start } => StartCause::WaitCancelled {
-                    start,
-                    requested_resume: None,
-                },
-                State::WaitUntil { start, end, .. } => StartCause::WaitCancelled {
-                    start,
-                    requested_resume: Some(end),
-                },
-                State::Exit => {
-                    // If we're in the exit state, don't do event processing
-                    return;
-                }
-            }
-        } else {
-            unreachable!("The runner cannot process events when it is not attached");
+        let start_cause = match (self.0.runner.borrow().maybe_runner())
+            .unwrap_or_else(|| {
+                unreachable!("The runner cannot process events when it is not attached")
+            })
+            .maybe_start_cause()
+        {
+            Some(c) => c,
+            // If we're in the exit state, don't do event processing
+            None => return,
         };
         // Take the start event, then the events provided to this function, and run an iteration of
         // the event loop
@@ -165,6 +242,26 @@ impl<T: 'static> Shared<T> {
         self.run_until_cleared(events);
     }
 
+    // Process the destroy-pending windows. This should only be called from
+    // `run_until_cleared` and `handle_scale_changed`, somewhere between emitting
+    // `NewEvents` and `MainEventsCleared`.
+    fn process_destroy_pending_windows(&self, control: &mut root::ControlFlow) {
+        while let Some(id) = self.0.destroy_pending.borrow_mut().pop_front() {
+            self.0
+                .all_canvases
+                .borrow_mut()
+                .retain(|&(item_id, _)| item_id != id);
+            self.handle_event(
+                Event::WindowEvent {
+                    window_id: id,
+                    event: crate::event::WindowEvent::Destroyed,
+                },
+                control,
+            );
+            self.0.redraw_pending.borrow_mut().remove(&id);
+        }
+    }
+
     // Given the set of new events, run the event loop until the main events and redraw events are
     // cleared
     //
@@ -174,6 +271,7 @@ impl<T: 'static> Shared<T> {
         for event in events {
             self.handle_event(event, &mut control);
         }
+        self.process_destroy_pending_windows(&mut control);
         self.handle_event(Event::MainEventsCleared, &mut control);
 
         // Collect all of the redraw events to avoid double-locking the RefCell
@@ -187,47 +285,139 @@ impl<T: 'static> Shared<T> {
         // If the event loop is closed, it has been closed this iteration and now the closing
         // event should be emitted
         if self.is_closed() {
-            self.handle_event(Event::LoopDestroyed, &mut control);
+            self.handle_loop_destroyed(&mut control);
+        }
+    }
+
+    pub fn handle_scale_changed(&self, old_scale: f64, new_scale: f64) {
+        // If there aren't any windows, then there is nothing to do here.
+        if self.0.all_canvases.borrow().is_empty() {
+            return;
+        }
+
+        let start_cause = match (self.0.runner.borrow().maybe_runner())
+            .unwrap_or_else(|| unreachable!("`scale_changed` should not happen without a runner"))
+            .maybe_start_cause()
+        {
+            Some(c) => c,
+            // If we're in the exit state, don't do event processing
+            None => return,
+        };
+        let mut control = self.current_control_flow();
+
+        // Handle the start event and all other events in the queue.
+        self.handle_event(Event::NewEvents(start_cause), &mut control);
+
+        // It is possible for windows to be dropped before this point. We don't
+        // want to send `ScaleFactorChanged` for destroyed windows, so we process
+        // the destroy-pending windows here.
+        self.process_destroy_pending_windows(&mut control);
+
+        // Now handle the `ScaleFactorChanged` events.
+        for &(id, ref canvas) in &*self.0.all_canvases.borrow() {
+            let canvas = match canvas.upgrade() {
+                Some(rc) => rc.borrow().raw().clone(),
+                // This shouldn't happen, but just in case...
+                None => continue,
+            };
+            // First, we send the `ScaleFactorChanged` event:
+            let current_size = crate::dpi::PhysicalSize {
+                width: canvas.width() as u32,
+                height: canvas.height() as u32,
+            };
+            let logical_size = current_size.to_logical::<f64>(old_scale);
+            let mut new_size = logical_size.to_physical(new_scale);
+            self.handle_single_event_sync(
+                Event::WindowEvent {
+                    window_id: id,
+                    event: crate::event::WindowEvent::ScaleFactorChanged {
+                        scale_factor: new_scale,
+                        new_inner_size: &mut new_size,
+                    },
+                },
+                &mut control,
+            );
+
+            // Then we resize the canvas to the new size and send a `Resized` event:
+            backend::set_canvas_size(&canvas, crate::dpi::Size::Physical(new_size));
+            self.handle_single_event_sync(
+                Event::WindowEvent {
+                    window_id: id,
+                    event: crate::event::WindowEvent::Resized(new_size),
+                },
+                &mut control,
+            );
+        }
+
+        // Process the destroy-pending windows again.
+        self.process_destroy_pending_windows(&mut control);
+        self.handle_event(Event::MainEventsCleared, &mut control);
+
+        // Discard all the pending redraw as we shall just redraw all windows.
+        self.0.redraw_pending.borrow_mut().clear();
+        for &(window_id, _) in &*self.0.all_canvases.borrow() {
+            self.handle_event(Event::RedrawRequested(window_id), &mut control);
+        }
+        self.handle_event(Event::RedrawEventsCleared, &mut control);
+
+        self.apply_control_flow(control);
+        // If the event loop is closed, it has been closed this iteration and now the closing
+        // event should be emitted
+        if self.is_closed() {
+            self.handle_loop_destroyed(&mut control);
         }
     }
 
     fn handle_unload(&self) {
         self.apply_control_flow(root::ControlFlow::Exit);
         let mut control = self.current_control_flow();
+        // We don't call `handle_loop_destroyed` here because we don't need to
+        // perform cleanup when the web browser is going to destroy the page.
         self.handle_event(Event::LoopDestroyed, &mut control);
     }
 
+    // handle_single_event_sync takes in an event and handles it synchronously.
+    //
+    // It should only ever be called from `scale_changed`.
+    fn handle_single_event_sync(&self, event: Event<'_, T>, control: &mut root::ControlFlow) {
+        if self.is_closed() {
+            *control = root::ControlFlow::Exit;
+        }
+        match *self.0.runner.borrow_mut() {
+            RunnerEnum::Running(ref mut runner) => {
+                runner.handle_single_event(event, control);
+            }
+            _ => panic!("Cannot handle event synchronously without a runner"),
+        }
+    }
+
     // handle_event takes in events and either queues them or applies a callback
     //
-    // It should only ever be called from send_event
+    // It should only ever be called from `run_until_cleared` and `scale_changed`.
     fn handle_event(&self, event: Event<'static, T>, control: &mut root::ControlFlow) {
-        let is_closed = self.is_closed();
-
+        if self.is_closed() {
+            *control = root::ControlFlow::Exit;
+        }
         match *self.0.runner.borrow_mut() {
-            Some(ref mut runner) => {
-                // An event is being processed, so the runner should be marked busy
-                runner.is_busy = true;
-
-                (runner.event_handler)(event, control);
-
-                // Maintain closed state, even if the callback changes it
-                if is_closed {
-                    *control = root::ControlFlow::Exit;
-                }
-
-                // An event is no longer being processed
-                runner.is_busy = false;
+            RunnerEnum::Running(ref mut runner) => {
+                runner.handle_single_event(event, control);
             }
             // If an event is being handled without a runner somehow, add it to the event queue so
             // it will eventually be processed
-            _ => self.0.events.borrow_mut().push_back(event),
+            RunnerEnum::Pending => self.0.events.borrow_mut().push_back(event),
+            // If the Runner has been destroyed, there is nothing to do.
+            RunnerEnum::Destroyed => return,
         }
 
+        let is_closed = *control == root::ControlFlow::Exit;
+
         // Don't take events out of the queue if the loop is closed or the runner doesn't exist
         // If the runner doesn't exist and this method recurses, it will recurse infinitely
-        if !is_closed && self.0.runner.borrow().is_some() {
+        if !is_closed && self.0.runner.borrow().maybe_runner().is_some() {
             // Take an event out of the queue and handle it
-            if let Some(event) = self.0.events.borrow_mut().pop_front() {
+            // Make sure not to let the borrow_mut live during the next handle_event
+            let event = { self.0.events.borrow_mut().pop_front() };
+            if let Some(event) = event {
                 self.handle_event(event, control);
             }
         }
@@ -240,7 +430,7 @@ impl<T: 'static> Shared<T> {
             root::ControlFlow::Poll => {
                 let cloned = self.clone();
                 State::Poll {
-                    timeout: backend::Timeout::new(move || cloned.poll(), Duration::from_millis(0)),
+                    request: backend::AnimationFrameRequest::new(move || cloned.poll()),
                 }
             }
             root::ControlFlow::Wait => State::Wait {
@@ -270,26 +460,61 @@ impl<T: 'static> Shared<T> {
         };
 
         match *self.0.runner.borrow_mut() {
-            Some(ref mut runner) => {
+            RunnerEnum::Running(ref mut runner) => {
                 runner.state = new_state;
             }
-            None => (),
+            _ => (),
         }
     }
 
+    fn handle_loop_destroyed(&self, control: &mut root::ControlFlow) {
+        self.handle_event(Event::LoopDestroyed, control);
+        let all_canvases = std::mem::take(&mut *self.0.all_canvases.borrow_mut());
+        *self.0.scale_change_detector.borrow_mut() = None;
+        *self.0.unload_event_handle.borrow_mut() = None;
+        // Dropping the `Runner` drops the event handler closure, which will in
+        // turn drop all `Window`s moved into the closure.
+        *self.0.runner.borrow_mut() = RunnerEnum::Destroyed;
+        for (_, canvas) in all_canvases {
+            // In case any remaining `Window`s are still not dropped, we will need
+            // to explicitly remove the event handlers associated with their canvases.
+            if let Some(canvas) = canvas.upgrade() {
+                let mut canvas = canvas.borrow_mut();
+                canvas.remove_listeners();
+            }
+        }
+        // At this point, the `self.0` `Rc` should only be strongly referenced
+        // by the following:
+        // * `self`, i.e. the item which triggered this event loop wakeup, which
+        //   is usually a `wasm-bindgen` `Closure`, which will be dropped after
+        //   returning to the JS glue code.
+        // * The `EventLoopWindowTarget` leaked inside `EventLoop::run` due to the
+        //   JS exception thrown at the end.
+        // * For each undropped `Window`:
+        //     * The `register_redraw_request` closure.
+        //     * The `destroy_fn` closure.
+    }
+
     // Check if the event loop is currently closed
     fn is_closed(&self) -> bool {
-        match *self.0.runner.borrow() {
-            Some(ref runner) => runner.state.is_exit(),
-            None => false, // If the event loop is None, it has not been intialised yet, so it cannot be closed
+        match self.0.runner.try_borrow().as_ref().map(Deref::deref) {
+            Ok(RunnerEnum::Running(runner)) => runner.state.is_exit(),
+            // The event loop is not closed since it is not initialized.
+            Ok(RunnerEnum::Pending) => false,
+            // The event loop is closed since it has been destroyed.
+            Ok(RunnerEnum::Destroyed) => true,
+            // Some other code is mutating the runner, which most likely means
+            // the event loop is running and busy.
+            Err(_) => false,
         }
     }
 
     // Get the current control flow state
     fn current_control_flow(&self) -> root::ControlFlow {
         match *self.0.runner.borrow() {
-            Some(ref runner) => runner.state.control_flow(),
-            None => root::ControlFlow::Poll,
+            RunnerEnum::Running(ref runner) => runner.state.control_flow(),
+            RunnerEnum::Pending => root::ControlFlow::Poll,
+            RunnerEnum::Destroyed => root::ControlFlow::Exit,
         }
     }
 }

src/platform_impl/web/event_loop/state.rs

@@ -15,7 +15,7 @@ pub enum State {
         start: Instant,
     },
     Poll {
-        timeout: backend::Timeout,
+        request: backend::AnimationFrameRequest,
     },
     Exit,
 }

src/platform_impl/web/event_loop/window_target.rs

@@ -1,9 +1,13 @@
-use super::{backend, device, proxy::Proxy, runner, window};
+use super::{super::monitor, backend, device, proxy::Proxy, runner, window};
 use crate::dpi::{PhysicalSize, Size};
 use crate::event::{DeviceId, ElementState, Event, KeyboardInput, TouchPhase, WindowEvent};
 use crate::event_loop::ControlFlow;
-use crate::window::WindowId;
+use crate::monitor::MonitorHandle as RootMH;
+use crate::window::{Theme, WindowId};
+use std::cell::RefCell;
 use std::clone::Clone;
+use std::collections::{vec_deque::IntoIter as VecDequeIter, VecDeque};
+use std::rc::Rc;
 
 pub struct WindowTarget<T: 'static> {
     pub(crate) runner: runner::Shared<T>,
@@ -28,18 +32,24 @@ impl<T> WindowTarget<T> {
         Proxy::new(self.runner.clone())
     }
 
-    pub fn run(&self, event_handler: Box<dyn FnMut(Event<'static, T>, &mut ControlFlow)>) {
+    pub fn run(&self, event_handler: Box<dyn FnMut(Event<'_, T>, &mut ControlFlow)>) {
         self.runner.set_listener(event_handler);
+        let runner = self.runner.clone();
+        self.runner.set_on_scale_change(move |arg| {
+            runner.handle_scale_changed(arg.old_scale, arg.new_scale)
+        });
     }
 
     pub fn generate_id(&self) -> window::Id {
         window::Id(self.runner.generate_id())
     }
 
-    pub fn register(&self, canvas: &mut backend::Canvas, id: window::Id) {
-        let runner = self.runner.clone();
+    pub fn register(&self, canvas: &Rc<RefCell<backend::Canvas>>, id: window::Id) {
+        self.runner.add_canvas(WindowId(id), canvas);
+        let mut canvas = canvas.borrow_mut();
         canvas.set_attribute("data-raw-handle", &id.0.to_string());
 
+        let runner = self.runner.clone();
         canvas.on_blur(move || {
             runner.send_event(Event::WindowEvent {
                 window_id: WindowId(id),
@@ -132,16 +142,29 @@ impl<T> WindowTarget<T> {
         });
 
         let runner = self.runner.clone();
-        canvas.on_mouse_press(move |pointer_id, button, modifiers| {
-            runner.send_event(Event::WindowEvent {
-                window_id: WindowId(id),
-                event: WindowEvent::MouseInput {
-                    device_id: DeviceId(device::Id(pointer_id)),
-                    state: ElementState::Pressed,
-                    button,
-                    modifiers,
-                },
-            });
+        canvas.on_mouse_press(move |pointer_id, position, button, modifiers| {
+            // A mouse down event may come in without any prior CursorMoved events,
+            // therefore we should send a CursorMoved event to make sure that the
+            // user code has the correct cursor position.
+            runner.send_events(
+                std::iter::once(Event::WindowEvent {
+                    window_id: WindowId(id),
+                    event: WindowEvent::CursorMoved {
+                        device_id: DeviceId(device::Id(pointer_id)),
+                        position,
+                        modifiers,
+                    },
+                })
+                .chain(std::iter::once(Event::WindowEvent {
+                    window_id: WindowId(id),
+                    event: WindowEvent::MouseInput {
+                        device_id: DeviceId(device::Id(pointer_id)),
+                        state: ElementState::Pressed,
+                        button,
+                        modifiers,
+                    },
+                })),
+            );
         });
 
         let runner = self.runner.clone();
@@ -199,5 +222,28 @@ impl<T> WindowTarget<T> {
             });
             runner.request_redraw(WindowId(id));
         });
+
+        let runner = self.runner.clone();
+        canvas.on_dark_mode(move |is_dark_mode| {
+            let theme = if is_dark_mode {
+                Theme::Dark
+            } else {
+                Theme::Light
+            };
+            runner.send_event(Event::WindowEvent {
+                window_id: WindowId(id),
+                event: WindowEvent::ThemeChanged(theme),
+            });
+        });
+    }
+
+    pub fn available_monitors(&self) -> VecDequeIter<monitor::Handle> {
+        VecDeque::new().into_iter()
+    }
+
+    pub fn primary_monitor(&self) -> Option<RootMH> {
+        Some(RootMH {
+            inner: monitor::Handle,
+        })
     }
 }

src/platform_impl/web/mod.rs

@@ -17,6 +17,9 @@
 // incoming events (from the registered handlers) and ensuring they are passed to the user in a
 // compliant way.
 
+// Silence warnings from use of deprecated stdweb backend
+#![allow(deprecated)]
+
 mod device;
 mod error;
 mod event_loop;
@@ -44,3 +47,11 @@ pub use self::window::{
     Id as WindowId, PlatformSpecificBuilderAttributes as PlatformSpecificWindowBuilderAttributes,
     Window,
 };
+
+pub(crate) use crate::icon::NoIcon as PlatformIcon;
+
+#[derive(Clone, Copy)]
+pub(crate) struct ScaleChangeArgs {
+    old_scale: f64,
+    new_scale: f64,
+}

src/platform_impl/web/stdweb/canvas.rs

@@ -6,17 +6,16 @@ use crate::platform_impl::{OsError, PlatformSpecificWindowBuilderAttributes};
 
 use std::cell::RefCell;
 use std::rc::Rc;
+use stdweb::js;
 use stdweb::traits::IPointerEvent;
 use stdweb::unstable::TryInto;
 use stdweb::web::event::{
-    BlurEvent, ConcreteEvent, FocusEvent, FullscreenChangeEvent, KeyDownEvent, KeyPressEvent,
-    KeyUpEvent, MouseWheelEvent, PointerDownEvent, PointerMoveEvent, PointerOutEvent,
-    PointerOverEvent, PointerUpEvent,
+    BlurEvent, ConcreteEvent, FocusEvent, FullscreenChangeEvent, IEvent, IKeyboardEvent,
+    KeyDownEvent, KeyPressEvent, KeyUpEvent, ModifierKey, MouseWheelEvent, PointerDownEvent,
+    PointerMoveEvent, PointerOutEvent, PointerOverEvent, PointerUpEvent,
 };
 use stdweb::web::html_element::CanvasElement;
-use stdweb::web::{
-    document, EventListenerHandle, IChildNode, IElement, IEventTarget, IHtmlElement,
-};
+use stdweb::web::{document, EventListenerHandle, IElement, IEventTarget, IHtmlElement};
 
 pub struct Canvas {
     /// Note: resizing the CanvasElement should go through `backend::set_canvas_size` to ensure the DPI factor is maintained.
@@ -36,12 +35,6 @@ pub struct Canvas {
     wants_fullscreen: Rc<RefCell<bool>>,
 }
 
-impl Drop for Canvas {
-    fn drop(&mut self) {
-        self.raw.remove();
-    }
-}
-
 impl Canvas {
     pub fn create(attr: PlatformSpecificWindowBuilderAttributes) -> Result<Self, RootOE> {
         let canvas = match attr.canvas {
@@ -129,6 +122,7 @@ impl Canvas {
         F: 'static + FnMut(ScanCode, Option<VirtualKeyCode>, ModifiersState),
     {
         self.on_keyboard_release = Some(self.add_user_event(move |event: KeyUpEvent| {
+            event.prevent_default();
             handler(
                 event::scan_code(&event),
                 event::virtual_key_code(&event),
@@ -142,6 +136,17 @@ impl Canvas {
         F: 'static + FnMut(ScanCode, Option<VirtualKeyCode>, ModifiersState),
     {
         self.on_keyboard_press = Some(self.add_user_event(move |event: KeyDownEvent| {
+            // event.prevent_default() would suppress subsequent on_received_character() calls. That
+            // supression is correct for key sequences like Tab/Shift-Tab, Ctrl+R, PgUp/Down to
+            // scroll, etc. We should not do it for key sequences that result in meaningful character
+            // input though.
+            let event_key = &event.key();
+            let is_key_string = event_key.len() == 1 || !event_key.is_ascii();
+            let is_shortcut_modifiers = (event.ctrl_key() || event.alt_key())
+                && !event.get_modifier_state(ModifierKey::AltGr);
+            if !is_key_string || is_shortcut_modifiers {
+                event.prevent_default();
+            }
             handler(
                 event::scan_code(&event),
                 event::virtual_key_code(&event),
@@ -160,6 +165,8 @@ impl Canvas {
         // viable/compatible alternative as of now. `beforeinput` is still widely
         // unsupported.
         self.on_received_character = Some(self.add_user_event(move |event: KeyPressEvent| {
+            // Supress further handling to stop keys like the space key from scrolling the page.
+            event.prevent_default();
             handler(event::codepoint(&event));
         }));
     }
@@ -197,14 +204,19 @@ impl Canvas {
 
     pub fn on_mouse_press<F>(&mut self, mut handler: F)
     where
-        F: 'static + FnMut(i32, MouseButton, ModifiersState),
+        F: 'static + FnMut(i32, PhysicalPosition<f64>, MouseButton, ModifiersState),
     {
+        let canvas = self.raw.clone();
         self.on_mouse_press = Some(self.add_user_event(move |event: PointerDownEvent| {
             handler(
                 event.pointer_id(),
+                event::mouse_position(&event).to_physical(super::scale_factor()),
                 event::mouse_button(&event),
                 event::mouse_modifiers(&event),
             );
+            canvas
+                .set_pointer_capture(event.pointer_id())
+                .expect("Failed to set pointer capture");
         }));
     }
 
@@ -227,6 +239,7 @@ impl Canvas {
         F: 'static + FnMut(i32, MouseScrollDelta, ModifiersState),
     {
         self.on_mouse_wheel = Some(self.add_event(move |event: MouseWheelEvent| {
+            event.prevent_default();
             if let Some(delta) = event::mouse_scroll_delta(&event) {
                 handler(0, delta, event::mouse_modifiers(&event));
             }
@@ -240,6 +253,22 @@ impl Canvas {
         self.on_fullscreen_change = Some(self.add_event(move |_: FullscreenChangeEvent| handler()));
     }
 
+    pub fn on_dark_mode<F>(&mut self, handler: F)
+    where
+        F: 'static + FnMut(bool),
+    {
+        // TODO: upstream to stdweb
+        js! {
+            var handler = @{handler};
+
+            if (window.matchMedia) {
+                window.matchMedia("(prefers-color-scheme: dark)").addListener(function(e) {
+                    handler(event.matches)
+                });
+            }
+        }
+    }
+
     fn add_event<E, F>(&self, mut handler: F) -> EventListenerHandle
     where
         E: ConcreteEvent,
@@ -281,4 +310,8 @@ impl Canvas {
     pub fn is_fullscreen(&self) -> bool {
         super::is_fullscreen(&self.raw)
     }
+
+    pub fn remove_listeners(&mut self) {
+        // TODO: Stub, unimplemented (see web_sys for reference).
+    }
 }

src/platform_impl/web/stdweb/event.rs

@@ -32,11 +32,14 @@ pub fn mouse_position(event: &impl IMouseEvent) -> LogicalPosition<f64> {
 
 pub fn mouse_scroll_delta(event: &MouseWheelEvent) -> Option<MouseScrollDelta> {
     let x = event.delta_x();
-    let y = event.delta_y();
+    let y = -event.delta_y();
 
     match event.delta_mode() {
         MouseWheelDeltaMode::Line => Some(MouseScrollDelta::LineDelta(x as f32, y as f32)),
-        MouseWheelDeltaMode::Pixel => Some(MouseScrollDelta::PixelDelta(LogicalPosition { x, y })),
+        MouseWheelDeltaMode::Pixel => {
+            let delta = LogicalPosition::new(x, y).to_physical(super::scale_factor());
+            Some(MouseScrollDelta::PixelDelta(delta))
+        }
         MouseWheelDeltaMode::Page => None,
     }
 }
@@ -143,7 +146,7 @@ pub fn virtual_key_code(event: &impl IKeyboardEvent) -> Option<VirtualKeyCode> {
         "Numpad9" => VirtualKeyCode::Numpad9,
         "AbntC1" => VirtualKeyCode::AbntC1,
         "AbntC2" => VirtualKeyCode::AbntC2,
-        "NumpadAdd" => VirtualKeyCode::Add,
+        "NumpadAdd" => VirtualKeyCode::NumpadAdd,
         "Quote" => VirtualKeyCode::Apostrophe,
         "Apps" => VirtualKeyCode::Apps,
         "At" => VirtualKeyCode::At,
@@ -154,8 +157,8 @@ pub fn virtual_key_code(event: &impl IKeyboardEvent) -> Option<VirtualKeyCode> {
         "Semicolon" => VirtualKeyCode::Semicolon,
         "Comma" => VirtualKeyCode::Comma,
         "Convert" => VirtualKeyCode::Convert,
-        "NumpadDecimal" => VirtualKeyCode::Decimal,
-        "NumpadDivide" => VirtualKeyCode::Divide,
+        "NumpadDecimal" => VirtualKeyCode::NumpadDecimal,
+        "NumpadDivide" => VirtualKeyCode::NumpadDivide,
         "Equal" => VirtualKeyCode::Equals,
         "Backquote" => VirtualKeyCode::Grave,
         "Kana" => VirtualKeyCode::Kana,
@@ -169,7 +172,7 @@ pub fn virtual_key_code(event: &impl IKeyboardEvent) -> Option<VirtualKeyCode> {
         "MediaSelect" => VirtualKeyCode::MediaSelect,
         "MediaStop" => VirtualKeyCode::MediaStop,
         "Minus" => VirtualKeyCode::Minus,
-        "NumpadMultiply" => VirtualKeyCode::Multiply,
+        "NumpadMultiply" => VirtualKeyCode::NumpadMultiply,
         "Mute" => VirtualKeyCode::Mute,
         "LaunchMyComputer" => VirtualKeyCode::MyComputer,
         "NavigateForward" => VirtualKeyCode::NavigateForward,
@@ -192,7 +195,7 @@ pub fn virtual_key_code(event: &impl IKeyboardEvent) -> Option<VirtualKeyCode> {
         "Slash" => VirtualKeyCode::Slash,
         "Sleep" => VirtualKeyCode::Sleep,
         "Stop" => VirtualKeyCode::Stop,
-        "NumpadSubtract" => VirtualKeyCode::Subtract,
+        "NumpadSubtract" => VirtualKeyCode::NumpadSubtract,
         "Sysrq" => VirtualKeyCode::Sysrq,
         "Tab" => VirtualKeyCode::Tab,
         "Underline" => VirtualKeyCode::Underline,

src/platform_impl/web/stdweb/mod.rs

@@ -1,15 +1,20 @@
+#![deprecated(since = "0.23.0", note = "Please migrate to web-sys over stdweb")]
+
 mod canvas;
 mod event;
+mod scaling;
 mod timeout;
 
 pub use self::canvas::Canvas;
-pub use self::timeout::Timeout;
+pub use self::scaling::ScaleChangeDetector;
+pub use self::timeout::{AnimationFrameRequest, Timeout};
 
 use crate::dpi::{LogicalSize, Size};
 use crate::platform::web::WindowExtStdweb;
 use crate::window::Window;
 
 use stdweb::js;
+use stdweb::unstable::TryInto;
 use stdweb::web::event::BeforeUnloadEvent;
 use stdweb::web::window;
 use stdweb::web::IEventTarget;
@@ -23,7 +28,9 @@ pub fn exit_fullscreen() {
     document().exit_fullscreen();
 }
 
-pub fn on_unload(mut handler: impl FnMut() + 'static) {
+pub type UnloadEventHandle = ();
+
+pub fn on_unload(mut handler: impl FnMut() + 'static) -> UnloadEventHandle {
     window().add_event_listener(move |_: BeforeUnloadEvent| handler());
 }
 
@@ -31,6 +38,15 @@ impl WindowExtStdweb for Window {
     fn canvas(&self) -> CanvasElement {
         self.window.canvas().raw().clone()
     }
+
+    fn is_dark_mode(&self) -> bool {
+        // TODO: upstream to stdweb
+        let is_dark_mode = js! {
+            return (window.matchMedia && window.matchMedia("(prefers-color-scheme: dark)").matches)
+        };
+
+        is_dark_mode.try_into().expect("should return a bool")
+    }
 }
 
 pub fn window_size() -> LogicalSize<f64> {
@@ -47,8 +63,6 @@ pub fn scale_factor() -> f64 {
 }
 
 pub fn set_canvas_size(raw: &CanvasElement, size: Size) {
-    use stdweb::*;
-
     let scale_factor = scale_factor();
 
     let physical_size = size.to_physical::<u32>(scale_factor);
@@ -57,9 +71,13 @@ pub fn set_canvas_size(raw: &CanvasElement, size: Size) {
     raw.set_width(physical_size.width);
     raw.set_height(physical_size.height);
 
+    set_canvas_style_property(raw, "width", &format!("{}px", logical_size.width));
+    set_canvas_style_property(raw, "height", &format!("{}px", logical_size.height));
+}
+
+pub fn set_canvas_style_property(raw: &CanvasElement, style_attribute: &str, value: &str) {
     js! {
-        @{raw.as_ref()}.style.width = @{logical_size.width} + "px";
-        @{raw.as_ref()}.style.height = @{logical_size.height} + "px";
+        @{raw.as_ref()}.style[@{style_attribute}] = @{value};
     }
 }
 

src/platform_impl/web/stdweb/scaling.rs

@@ -0,0 +1,13 @@
+use super::super::ScaleChangeArgs;
+
+pub struct ScaleChangeDetector(());
+
+impl ScaleChangeDetector {
+    pub(crate) fn new<F>(_handler: F) -> Self
+    where
+        F: 'static + FnMut(ScaleChangeArgs),
+    {
+        // TODO: Stub, unimplemented (see web_sys for reference).
+        Self(())
+    }
+}

src/platform_impl/web/stdweb/timeout.rs

@@ -1,5 +1,7 @@
+use std::cell::Cell;
+use std::rc::Rc;
 use std::time::Duration;
-use stdweb::web::{window, IWindowOrWorker, TimeoutHandle};
+use stdweb::web::{window, IWindowOrWorker, RequestAnimationFrameHandle, TimeoutHandle};
 
 #[derive(Debug)]
 pub struct Timeout {
@@ -23,3 +25,39 @@ impl Drop for Timeout {
         handle.clear();
     }
 }
+
+#[derive(Debug)]
+pub struct AnimationFrameRequest {
+    handle: Option<RequestAnimationFrameHandle>,
+    // track callback state, because `cancelAnimationFrame` is slow
+    fired: Rc<Cell<bool>>,
+}
+
+impl AnimationFrameRequest {
+    pub fn new<F>(mut f: F) -> AnimationFrameRequest
+    where
+        F: 'static + FnMut(),
+    {
+        let fired = Rc::new(Cell::new(false));
+        let c_fired = fired.clone();
+        let handle = window().request_animation_frame(move |_| {
+            (*c_fired).set(true);
+            f();
+        });
+
+        AnimationFrameRequest {
+            handle: Some(handle),
+            fired,
+        }
+    }
+}
+
+impl Drop for AnimationFrameRequest {
+    fn drop(&mut self) {
+        if !(*self.fired).get() {
+            if let Some(handle) = self.handle.take() {
+                handle.cancel();
+            }
+        }
+    }
+}

src/platform_impl/web/web_sys/canvas.rs

@@ -1,4 +1,6 @@
 use super::event;
+use super::event_handle::EventListenerHandle;
+use super::media_query_handle::MediaQueryListHandle;
 use crate::dpi::{LogicalPosition, PhysicalPosition, PhysicalSize};
 use crate::error::OsError as RootOE;
 use crate::event::{ModifiersState, MouseButton, MouseScrollDelta, ScanCode, VirtualKeyCode};
@@ -8,30 +10,31 @@ use std::cell::RefCell;
 use std::rc::Rc;
 
 use wasm_bindgen::{closure::Closure, JsCast};
-use web_sys::{Event, FocusEvent, HtmlCanvasElement, KeyboardEvent, PointerEvent, WheelEvent};
+use web_sys::{
+    AddEventListenerOptions, Event, FocusEvent, HtmlCanvasElement, KeyboardEvent,
+    MediaQueryListEvent, MouseEvent, WheelEvent,
+};
+
+mod mouse_handler;
+mod pointer_handler;
 
 pub struct Canvas {
-    /// Note: resizing the HTMLCanvasElement should go through `backend::set_canvas_size` to ensure the DPI factor is maintained.
-    raw: HtmlCanvasElement,
-    on_focus: Option<Closure<dyn FnMut(FocusEvent)>>,
-    on_blur: Option<Closure<dyn FnMut(FocusEvent)>>,
-    on_keyboard_release: Option<Closure<dyn FnMut(KeyboardEvent)>>,
-    on_keyboard_press: Option<Closure<dyn FnMut(KeyboardEvent)>>,
-    on_received_character: Option<Closure<dyn FnMut(KeyboardEvent)>>,
-    on_cursor_leave: Option<Closure<dyn FnMut(PointerEvent)>>,
-    on_cursor_enter: Option<Closure<dyn FnMut(PointerEvent)>>,
-    on_cursor_move: Option<Closure<dyn FnMut(PointerEvent)>>,
-    on_mouse_press: Option<Closure<dyn FnMut(PointerEvent)>>,
-    on_mouse_release: Option<Closure<dyn FnMut(PointerEvent)>>,
-    on_mouse_wheel: Option<Closure<dyn FnMut(WheelEvent)>>,
-    on_fullscreen_change: Option<Closure<dyn FnMut(Event)>>,
-    wants_fullscreen: Rc<RefCell<bool>>,
+    common: Common,
+    on_focus: Option<EventListenerHandle<dyn FnMut(FocusEvent)>>,
+    on_blur: Option<EventListenerHandle<dyn FnMut(FocusEvent)>>,
+    on_keyboard_release: Option<EventListenerHandle<dyn FnMut(KeyboardEvent)>>,
+    on_keyboard_press: Option<EventListenerHandle<dyn FnMut(KeyboardEvent)>>,
+    on_received_character: Option<EventListenerHandle<dyn FnMut(KeyboardEvent)>>,
+    on_mouse_wheel: Option<EventListenerHandle<dyn FnMut(WheelEvent)>>,
+    on_fullscreen_change: Option<EventListenerHandle<dyn FnMut(Event)>>,
+    on_dark_mode: Option<MediaQueryListHandle>,
+    mouse_state: MouseState,
 }
 
-impl Drop for Canvas {
-    fn drop(&mut self) {
-        self.raw.remove();
-    }
+struct Common {
+    /// Note: resizing the HTMLCanvasElement should go through `backend::set_canvas_size` to ensure the DPI factor is maintained.
+    raw: HtmlCanvasElement,
+    wants_fullscreen: Rc<RefCell<bool>>,
 }
 
 impl Canvas {
@@ -62,32 +65,38 @@ impl Canvas {
             .set_attribute("tabindex", "0")
             .map_err(|_| os_error!(OsError("Failed to set a tabindex".to_owned())))?;
 
+        let mouse_state = if has_pointer_event() {
+            MouseState::HasPointerEvent(pointer_handler::PointerHandler::new())
+        } else {
+            MouseState::NoPointerEvent(mouse_handler::MouseHandler::new())
+        };
+
         Ok(Canvas {
-            raw: canvas,
+            common: Common {
+                raw: canvas,
+                wants_fullscreen: Rc::new(RefCell::new(false)),
+            },
             on_blur: None,
             on_focus: None,
             on_keyboard_release: None,
             on_keyboard_press: None,
             on_received_character: None,
-            on_cursor_leave: None,
-            on_cursor_enter: None,
-            on_cursor_move: None,
-            on_mouse_release: None,
-            on_mouse_press: None,
             on_mouse_wheel: None,
             on_fullscreen_change: None,
-            wants_fullscreen: Rc::new(RefCell::new(false)),
+            on_dark_mode: None,
+            mouse_state,
         })
     }
 
     pub fn set_attribute(&self, attribute: &str, value: &str) {
-        self.raw
+        self.common
+            .raw
             .set_attribute(attribute, value)
             .expect(&format!("Set attribute: {}", attribute));
     }
 
     pub fn position(&self) -> LogicalPosition<f64> {
-        let bounds = self.raw.get_bounding_client_rect();
+        let bounds = self.common.raw.get_bounding_client_rect();
 
         LogicalPosition {
             x: bounds.x(),
@@ -97,20 +106,20 @@ impl Canvas {
 
     pub fn size(&self) -> PhysicalSize<u32> {
         PhysicalSize {
-            width: self.raw.width(),
-            height: self.raw.height(),
+            width: self.common.raw.width(),
+            height: self.common.raw.height(),
         }
     }
 
     pub fn raw(&self) -> &HtmlCanvasElement {
-        &self.raw
+        &self.common.raw
     }
 
     pub fn on_blur<F>(&mut self, mut handler: F)
     where
         F: 'static + FnMut(),
     {
-        self.on_blur = Some(self.add_event("blur", move |_: FocusEvent| {
+        self.on_blur = Some(self.common.add_event("blur", move |_: FocusEvent| {
             handler();
         }));
     }
@@ -119,7 +128,7 @@ impl Canvas {
     where
         F: 'static + FnMut(),
     {
-        self.on_focus = Some(self.add_event("focus", move |_: FocusEvent| {
+        self.on_focus = Some(self.common.add_event("focus", move |_: FocusEvent| {
             handler();
         }));
     }
@@ -128,28 +137,44 @@ impl Canvas {
     where
         F: 'static + FnMut(ScanCode, Option<VirtualKeyCode>, ModifiersState),
     {
-        self.on_keyboard_release =
-            Some(self.add_user_event("keyup", move |event: KeyboardEvent| {
+        self.on_keyboard_release = Some(self.common.add_user_event(
+            "keyup",
+            move |event: KeyboardEvent| {
+                event.prevent_default();
                 handler(
                     event::scan_code(&event),
                     event::virtual_key_code(&event),
                     event::keyboard_modifiers(&event),
                 );
-            }));
+            },
+        ));
     }
 
     pub fn on_keyboard_press<F>(&mut self, mut handler: F)
     where
         F: 'static + FnMut(ScanCode, Option<VirtualKeyCode>, ModifiersState),
     {
-        self.on_keyboard_press =
-            Some(self.add_user_event("keydown", move |event: KeyboardEvent| {
+        self.on_keyboard_press = Some(self.common.add_user_event(
+            "keydown",
+            move |event: KeyboardEvent| {
+                // event.prevent_default() would suppress subsequent on_received_character() calls. That
+                // supression is correct for key sequences like Tab/Shift-Tab, Ctrl+R, PgUp/Down to
+                // scroll, etc. We should not do it for key sequences that result in meaningful character
+                // input though.
+                let event_key = &event.key();
+                let is_key_string = event_key.len() == 1 || !event_key.is_ascii();
+                let is_shortcut_modifiers =
+                    (event.ctrl_key() || event.alt_key()) && !event.get_modifier_state("AltGr");
+                if !is_key_string || is_shortcut_modifiers {
+                    event.prevent_default();
+                }
                 handler(
                     event::scan_code(&event),
                     event::virtual_key_code(&event),
                     event::keyboard_modifiers(&event),
                 );
-            }));
+            },
+        ));
     }
 
     pub fn on_received_character<F>(&mut self, mut handler: F)
@@ -161,82 +186,72 @@ impl Canvas {
         // The `keypress` event is deprecated, but there does not seem to be a
         // viable/compatible alternative as of now. `beforeinput` is still widely
         // unsupported.
-        self.on_received_character = Some(self.add_user_event(
+        self.on_received_character = Some(self.common.add_user_event(
             "keypress",
             move |event: KeyboardEvent| {
+                // Supress further handling to stop keys like the space key from scrolling the page.
+                event.prevent_default();
                 handler(event::codepoint(&event));
             },
         ));
     }
 
-    pub fn on_cursor_leave<F>(&mut self, mut handler: F)
+    pub fn on_cursor_leave<F>(&mut self, handler: F)
     where
         F: 'static + FnMut(i32),
     {
-        self.on_cursor_leave = Some(self.add_event("pointerout", move |event: PointerEvent| {
-            handler(event.pointer_id());
-        }));
+        match &mut self.mouse_state {
+            MouseState::HasPointerEvent(h) => h.on_cursor_leave(&self.common, handler),
+            MouseState::NoPointerEvent(h) => h.on_cursor_leave(&self.common, handler),
+        }
     }
 
-    pub fn on_cursor_enter<F>(&mut self, mut handler: F)
+    pub fn on_cursor_enter<F>(&mut self, handler: F)
     where
         F: 'static + FnMut(i32),
     {
-        self.on_cursor_enter = Some(self.add_event("pointerover", move |event: PointerEvent| {
-            handler(event.pointer_id());
-        }));
+        match &mut self.mouse_state {
+            MouseState::HasPointerEvent(h) => h.on_cursor_enter(&self.common, handler),
+            MouseState::NoPointerEvent(h) => h.on_cursor_enter(&self.common, handler),
+        }
     }
 
-    pub fn on_mouse_release<F>(&mut self, mut handler: F)
+    pub fn on_mouse_release<F>(&mut self, handler: F)
     where
         F: 'static + FnMut(i32, MouseButton, ModifiersState),
     {
-        self.on_mouse_release = Some(self.add_user_event(
-            "pointerup",
-            move |event: PointerEvent| {
-                handler(
-                    event.pointer_id(),
-                    event::mouse_button(&event),
-                    event::mouse_modifiers(&event),
-                );
-            },
-        ));
+        match &mut self.mouse_state {
+            MouseState::HasPointerEvent(h) => h.on_mouse_release(&self.common, handler),
+            MouseState::NoPointerEvent(h) => h.on_mouse_release(&self.common, handler),
+        }
     }
 
-    pub fn on_mouse_press<F>(&mut self, mut handler: F)
+    pub fn on_mouse_press<F>(&mut self, handler: F)
     where
-        F: 'static + FnMut(i32, MouseButton, ModifiersState),
+        F: 'static + FnMut(i32, PhysicalPosition<f64>, MouseButton, ModifiersState),
     {
-        self.on_mouse_press = Some(self.add_user_event(
-            "pointerdown",
-            move |event: PointerEvent| {
-                handler(
-                    event.pointer_id(),
-                    event::mouse_button(&event),
-                    event::mouse_modifiers(&event),
-                );
-            },
-        ));
+        match &mut self.mouse_state {
+            MouseState::HasPointerEvent(h) => h.on_mouse_press(&self.common, handler),
+            MouseState::NoPointerEvent(h) => h.on_mouse_press(&self.common, handler),
+        }
     }
 
-    pub fn on_cursor_move<F>(&mut self, mut handler: F)
+    pub fn on_cursor_move<F>(&mut self, handler: F)
     where
         F: 'static + FnMut(i32, PhysicalPosition<f64>, ModifiersState),
     {
-        self.on_cursor_move = Some(self.add_event("pointermove", move |event: PointerEvent| {
-            handler(
-                event.pointer_id(),
-                event::mouse_position(&event).to_physical(super::scale_factor()),
-                event::mouse_modifiers(&event),
-            );
-        }));
+        match &mut self.mouse_state {
+            MouseState::HasPointerEvent(h) => h.on_cursor_move(&self.common, handler),
+            MouseState::NoPointerEvent(h) => h.on_cursor_move(&self.common, handler),
+        }
     }
 
     pub fn on_mouse_wheel<F>(&mut self, mut handler: F)
     where
         F: 'static + FnMut(i32, MouseScrollDelta, ModifiersState),
     {
-        self.on_mouse_wheel = Some(self.add_event("wheel", move |event: WheelEvent| {
+        self.on_mouse_wheel = Some(self.common.add_event("wheel", move |event: WheelEvent| {
+            event.prevent_default();
             if let Some(delta) = event::mouse_scroll_delta(&event) {
                 handler(0, delta, event::mouse_modifiers(&event));
             }
@@ -247,11 +262,54 @@ impl Canvas {
     where
         F: 'static + FnMut(),
     {
-        self.on_fullscreen_change =
-            Some(self.add_event("fullscreenchange", move |_: Event| handler()));
+        self.on_fullscreen_change = Some(
+            self.common
+                .add_event("fullscreenchange", move |_: Event| handler()),
+        );
     }
 
-    fn add_event<E, F>(&self, event_name: &str, mut handler: F) -> Closure<dyn FnMut(E)>
+    pub fn on_dark_mode<F>(&mut self, mut handler: F)
+    where
+        F: 'static + FnMut(bool),
+    {
+        let closure =
+            Closure::wrap(
+                Box::new(move |event: MediaQueryListEvent| handler(event.matches()))
+                    as Box<dyn FnMut(_)>,
+            );
+        self.on_dark_mode = MediaQueryListHandle::new("(prefers-color-scheme: dark)", closure);
+    }
+
+    pub fn request_fullscreen(&self) {
+        self.common.request_fullscreen()
+    }
+
+    pub fn is_fullscreen(&self) -> bool {
+        self.common.is_fullscreen()
+    }
+
+    pub fn remove_listeners(&mut self) {
+        self.on_focus = None;
+        self.on_blur = None;
+        self.on_keyboard_release = None;
+        self.on_keyboard_press = None;
+        self.on_received_character = None;
+        self.on_mouse_wheel = None;
+        self.on_fullscreen_change = None;
+        self.on_dark_mode = None;
+        match &mut self.mouse_state {
+            MouseState::HasPointerEvent(h) => h.remove_listeners(),
+            MouseState::NoPointerEvent(h) => h.remove_listeners(),
+        }
+    }
+}
+
+impl Common {
+    fn add_event<E, F>(
+        &self,
+        event_name: &'static str,
+        mut handler: F,
+    ) -> EventListenerHandle<dyn FnMut(E)>
     where
         E: 'static + AsRef<web_sys::Event> + wasm_bindgen::convert::FromWasmAbi,
         F: 'static + FnMut(E),
@@ -266,17 +324,19 @@ impl Canvas {
             handler(event);
         }) as Box<dyn FnMut(E)>);
 
-        self.raw
-            .add_event_listener_with_callback(event_name, &closure.as_ref().unchecked_ref())
-            .expect("Failed to add event listener with callback");
+        let listener = EventListenerHandle::new(&self.raw, event_name, closure);
 
-        closure
+        listener
     }
 
     // The difference between add_event and add_user_event is that the latter has a special meaning
     // for browser security. A user event is a deliberate action by the user (like a mouse or key
     // press) and is the only time things like a fullscreen request may be successfully completed.)
-    fn add_user_event<E, F>(&self, event_name: &str, mut handler: F) -> Closure<dyn FnMut(E)>
+    fn add_user_event<E, F>(
+        &self,
+        event_name: &'static str,
+        mut handler: F,
+    ) -> EventListenerHandle<dyn FnMut(E)>
     where
         E: 'static + AsRef<web_sys::Event> + wasm_bindgen::convert::FromWasmAbi,
         F: 'static + FnMut(E),
@@ -296,6 +356,43 @@ impl Canvas {
         })
     }
 
+    // This function is used exclusively for mouse events (not pointer events).
+    // Due to the need for mouse capturing, the mouse event handlers are added
+    // to the window instead of the canvas element, which requires special
+    // handling to control event propagation.
+    fn add_window_mouse_event<F>(
+        &self,
+        event_name: &'static str,
+        mut handler: F,
+    ) -> EventListenerHandle<dyn FnMut(MouseEvent)>
+    where
+        F: 'static + FnMut(MouseEvent),
+    {
+        let wants_fullscreen = self.wants_fullscreen.clone();
+        let canvas = self.raw.clone();
+        let window = web_sys::window().expect("Failed to obtain window");
+
+        let closure = Closure::wrap(Box::new(move |event: MouseEvent| {
+            handler(event);
+
+            if *wants_fullscreen.borrow() {
+                canvas
+                    .request_fullscreen()
+                    .expect("Failed to enter fullscreen");
+                *wants_fullscreen.borrow_mut() = false;
+            }
+        }) as Box<dyn FnMut(_)>);
+
+        let listener = EventListenerHandle::with_options(
+            &window,
+            event_name,
+            closure,
+            AddEventListenerOptions::new().capture(true),
+        );
+
+        listener
+    }
+
     pub fn request_fullscreen(&self) {
         *self.wants_fullscreen.borrow_mut() = true;
     }
@@ -304,3 +401,20 @@ impl Canvas {
         super::is_fullscreen(&self.raw)
     }
 }
+
+enum MouseState {
+    HasPointerEvent(pointer_handler::PointerHandler),
+    NoPointerEvent(mouse_handler::MouseHandler),
+}
+
+/// Returns whether pointer events are supported.
+/// Used to decide whether to use pointer events
+/// or plain mouse events. Note that Safari
+/// doesn't support pointer events now.
+fn has_pointer_event() -> bool {
+    if let Some(window) = web_sys::window() {
+        window.get("PointerEvent").is_some()
+    } else {
+        false
+    }
+}

src/platform_impl/web/web_sys/canvas/mouse_handler.rs

@@ -0,0 +1,212 @@
+use super::event;
+use super::EventListenerHandle;
+use crate::dpi::PhysicalPosition;
+use crate::event::{ModifiersState, MouseButton};
+
+use std::cell::RefCell;
+use std::rc::Rc;
+
+use web_sys::{EventTarget, MouseEvent};
+
+pub(super) struct MouseHandler {
+    on_mouse_leave: Option<EventListenerHandle<dyn FnMut(MouseEvent)>>,
+    on_mouse_enter: Option<EventListenerHandle<dyn FnMut(MouseEvent)>>,
+    on_mouse_move: Option<EventListenerHandle<dyn FnMut(MouseEvent)>>,
+    on_mouse_press: Option<EventListenerHandle<dyn FnMut(MouseEvent)>>,
+    on_mouse_release: Option<EventListenerHandle<dyn FnMut(MouseEvent)>>,
+    on_mouse_leave_handler: Rc<RefCell<Option<Box<dyn FnMut(i32)>>>>,
+    mouse_capture_state: Rc<RefCell<MouseCaptureState>>,
+}
+
+#[derive(PartialEq, Eq)]
+pub(super) enum MouseCaptureState {
+    NotCaptured,
+    Captured,
+    OtherElement,
+}
+
+impl MouseHandler {
+    pub fn new() -> Self {
+        Self {
+            on_mouse_leave: None,
+            on_mouse_enter: None,
+            on_mouse_move: None,
+            on_mouse_press: None,
+            on_mouse_release: None,
+            on_mouse_leave_handler: Rc::new(RefCell::new(None)),
+            mouse_capture_state: Rc::new(RefCell::new(MouseCaptureState::NotCaptured)),
+        }
+    }
+    pub fn on_cursor_leave<F>(&mut self, canvas_common: &super::Common, handler: F)
+    where
+        F: 'static + FnMut(i32),
+    {
+        *self.on_mouse_leave_handler.borrow_mut() = Some(Box::new(handler));
+        let on_mouse_leave_handler = self.on_mouse_leave_handler.clone();
+        let mouse_capture_state = self.mouse_capture_state.clone();
+        self.on_mouse_leave = Some(canvas_common.add_event("mouseout", move |_: MouseEvent| {
+            // If the mouse is being captured, it is always considered
+            // to be "within" the the canvas, until the capture has been
+            // released, therefore we don't send cursor leave events.
+            if *mouse_capture_state.borrow() != MouseCaptureState::Captured {
+                if let Some(handler) = on_mouse_leave_handler.borrow_mut().as_mut() {
+                    handler(0);
+                }
+            }
+        }));
+    }
+
+    pub fn on_cursor_enter<F>(&mut self, canvas_common: &super::Common, mut handler: F)
+    where
+        F: 'static + FnMut(i32),
+    {
+        let mouse_capture_state = self.mouse_capture_state.clone();
+        self.on_mouse_enter = Some(canvas_common.add_event("mouseover", move |_: MouseEvent| {
+            // We don't send cursor leave events when the mouse is being
+            // captured, therefore we do the same with cursor enter events.
+            if *mouse_capture_state.borrow() != MouseCaptureState::Captured {
+                handler(0);
+            }
+        }));
+    }
+
+    pub fn on_mouse_release<F>(&mut self, canvas_common: &super::Common, mut handler: F)
+    where
+        F: 'static + FnMut(i32, MouseButton, ModifiersState),
+    {
+        let on_mouse_leave_handler = self.on_mouse_leave_handler.clone();
+        let mouse_capture_state = self.mouse_capture_state.clone();
+        let canvas = canvas_common.raw.clone();
+        self.on_mouse_release = Some(canvas_common.add_window_mouse_event(
+            "mouseup",
+            move |event: MouseEvent| {
+                let canvas = canvas.clone();
+                let mut mouse_capture_state = mouse_capture_state.borrow_mut();
+                match &*mouse_capture_state {
+                    // Shouldn't happen but we'll just ignore it.
+                    MouseCaptureState::NotCaptured => return,
+                    MouseCaptureState::OtherElement => {
+                        if event.buttons() == 0 {
+                            // No buttons are pressed anymore so reset
+                            // the capturing state.
+                            *mouse_capture_state = MouseCaptureState::NotCaptured;
+                        }
+                        return;
+                    }
+                    MouseCaptureState::Captured => {}
+                }
+                event.stop_propagation();
+                handler(
+                    0,
+                    event::mouse_button(&event),
+                    event::mouse_modifiers(&event),
+                );
+                if event
+                    .target()
+                    .map_or(false, |target| target != EventTarget::from(canvas))
+                {
+                    // Since we do not send cursor leave events while the
+                    // cursor is being captured, we instead send it after
+                    // the capture has been released.
+                    if let Some(handler) = on_mouse_leave_handler.borrow_mut().as_mut() {
+                        handler(0);
+                    }
+                }
+                if event.buttons() == 0 {
+                    // No buttons are pressed anymore so reset
+                    // the capturing state.
+                    *mouse_capture_state = MouseCaptureState::NotCaptured;
+                }
+            },
+        ));
+    }
+
+    pub fn on_mouse_press<F>(&mut self, canvas_common: &super::Common, mut handler: F)
+    where
+        F: 'static + FnMut(i32, PhysicalPosition<f64>, MouseButton, ModifiersState),
+    {
+        let mouse_capture_state = self.mouse_capture_state.clone();
+        let canvas = canvas_common.raw.clone();
+        self.on_mouse_press = Some(canvas_common.add_window_mouse_event(
+            "mousedown",
+            move |event: MouseEvent| {
+                let canvas = canvas.clone();
+                let mut mouse_capture_state = mouse_capture_state.borrow_mut();
+                match &*mouse_capture_state {
+                    MouseCaptureState::NotCaptured
+                        if event
+                            .target()
+                            .map_or(false, |target| target != EventTarget::from(canvas)) =>
+                    {
+                        // The target isn't our canvas which means the
+                        // mouse is pressed outside of it.
+                        *mouse_capture_state = MouseCaptureState::OtherElement;
+                        return;
+                    }
+                    MouseCaptureState::OtherElement => return,
+                    _ => {}
+                }
+                *mouse_capture_state = MouseCaptureState::Captured;
+                event.stop_propagation();
+                handler(
+                    0,
+                    event::mouse_position(&event).to_physical(super::super::scale_factor()),
+                    event::mouse_button(&event),
+                    event::mouse_modifiers(&event),
+                );
+            },
+        ));
+    }
+
+    pub fn on_cursor_move<F>(&mut self, canvas_common: &super::Common, mut handler: F)
+    where
+        F: 'static + FnMut(i32, PhysicalPosition<f64>, ModifiersState),
+    {
+        let mouse_capture_state = self.mouse_capture_state.clone();
+        let canvas = canvas_common.raw.clone();
+        self.on_mouse_move = Some(canvas_common.add_window_mouse_event(
+            "mousemove",
+            move |event: MouseEvent| {
+                let canvas = canvas.clone();
+                let mouse_capture_state = mouse_capture_state.borrow();
+                let is_over_canvas = event
+                    .target()
+                    .map_or(false, |target| target == EventTarget::from(canvas.clone()));
+                match &*mouse_capture_state {
+                    // Don't handle hover events outside of canvas.
+                    MouseCaptureState::NotCaptured if !is_over_canvas => return,
+                    MouseCaptureState::OtherElement if !is_over_canvas => return,
+                    // If hovering over the canvas, just send the cursor move event.
+                    MouseCaptureState::NotCaptured
+                    | MouseCaptureState::OtherElement
+                    | MouseCaptureState::Captured => {
+                        if *mouse_capture_state == MouseCaptureState::Captured {
+                            event.stop_propagation();
+                        }
+                        let mouse_pos = if is_over_canvas {
+                            event::mouse_position(&event)
+                        } else {
+                            // Since the mouse is not on the canvas, we cannot
+                            // use `offsetX`/`offsetY`.
+                            event::mouse_position_by_client(&event, &canvas)
+                        };
+                        handler(
+                            0,
+                            mouse_pos.to_physical(super::super::scale_factor()),
+                            event::mouse_modifiers(&event),
+                        );
+                    }
+                }
+            },
+        ));
+    }
+
+    pub fn remove_listeners(&mut self) {
+        self.on_mouse_leave = None;
+        self.on_mouse_enter = None;
+        self.on_mouse_move = None;
+        self.on_mouse_press = None;
+        self.on_mouse_release = None;
+        *self.on_mouse_leave_handler.borrow_mut() = None;
+    }
+}