Add raw-window-handle support to Winit 0.19 and bump version (#1225)

* Add raw-window-handle support to Winit 0.19 and bump version

* Hopefully fix linux and ios builds

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,3 +2,4 @@
 - [ ] Added an entry to `CHANGELOG.md` if knowledge of this change could be valuable to users
 - [ ] Updated documentation to reflect any user-facing changes, including notes of platform-specific behavior
 - [ ] Created an example program if it would help users understand this functionality
+- [ ] Updated [feature matrix](https://github.com/rust-windowing/winit/blob/master/FEATURES.md), if new features were added or implemented

.gitignore

@@ -1,5 +1,6 @@
 Cargo.lock
 target/
 rls/
+.vscode/
 *~
 #*#

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "deps/apk-builder"]
 	path = deps/apk-builder
-	url = https://github.com/tomaka/android-rs-glue
+	url = https://github.com/rust-windowing/android-rs-glue

.travis.yml

@@ -19,12 +19,6 @@ matrix:
       addons:
         apt:
           packages: *i686_packages
-    - env: TARGET=i686-unknown-linux-gnu
-      os: linux
-      rust: 1.24.1
-      addons:
-        apt:
-          packages: *i686_packages
 
     # Linux 64bit
     - env: TARGET=x86_64-unknown-linux-gnu
@@ -33,9 +27,6 @@ matrix:
     - env: TARGET=x86_64-unknown-linux-gnu
       os: linux
       rust: stable
-    - env: TARGET=x86_64-unknown-linux-gnu
-      os: linux
-      rust: 1.24.1
 
     # macOS
     - env: TARGET=x86_64-apple-darwin
@@ -44,9 +35,6 @@ matrix:
     - env: TARGET=x86_64-apple-darwin
       os: osx
       rust: stable
-    - env: TARGET=x86_64-apple-darwin
-      os: osx
-      rust: 1.24.1
 
     # iOS
     - env: TARGET=x86_64-apple-ios
@@ -55,9 +43,6 @@ matrix:
     - env: TARGET=x86_64-apple-ios
       os: osx
       rust: stable
-    - env: TARGET=x86_64-apple-ios
-      os: osx
-      rust: 1.24.1
 
 install:
   - rustup self update
@@ -65,8 +50,12 @@ install:
 
 script:
   - cargo build --target $TARGET --verbose
+  - cargo build --target $TARGET --features serde --verbose
+  - cargo build --target $TARGET --features icon_loading --verbose
   # Running iOS apps on OSX requires the simulator so we skip that for now
   - if [ "$TARGET" != "x86_64-apple-ios" ]; then cargo test --target $TARGET --verbose; fi
+  - if [ "$TARGET" != "x86_64-apple-ios" ]; then cargo test --target $TARGET --features serde --verbose; fi
+  - if [ "$TARGET" != "x86_64-apple-ios" ]; then cargo test --target $TARGET --features icon_loading --verbose; fi
 
 after_success:
   - |

CHANGELOG.md

@@ -1,5 +1,133 @@
 # Unreleased
 
+# Version 0.19.4 (2019-10-16)
+
+- Add support for `raw-window-handle` 0.3.
+
+# Version 0.19.3 (2019-08-26)
+
+- Update parking_lot version.
+
+# Version 0.19.2 (2019-07-29)
+
+- On X11, fix sanity check which checks that a monitor's reported width and height (in millimeters) are non-zero when calculating the DPI factor.
+
+# Version 0.19.1 (2019-04-08)
+
+- On Wayland, added a `get_wayland_display` function to `EventsLoopExt`.
+- On Windows, fix `CursorMoved(0, 0)` getting dispatched on window focus.
+- On macOS, fix command key event left and right reverse.
+- On FreeBSD, NetBSD, and OpenBSD, fix build of X11 backend.
+- On Windows, fix icon not showing up in corner of window.
+- On X11, change DPI scaling factor behavior. First, winit tries to read it from "Xft.dpi" XResource, and uses DPI calculation from xrandr dimensions as fallback behavior.
+
+# Version 0.19.0 (2019-03-06)
+
+- On X11, we will use the faster `XRRGetScreenResourcesCurrent` function instead of `XRRGetScreenResources` when available.
+- On macOS, fix keycodes being incorrect when using a non-US keyboard layout.
+- On Wayland, fix `with_title()` not setting the windows title
+- On Wayland, add `set_wayland_theme()` to control client decoration color theme
+- Added serde serialization to `os::unix::XWindowType`.
+- **Breaking:** `image` crate upgraded to 0.21. This is exposed as part of the `icon_loading` API.
+- On X11, make event loop thread safe by replacing XNextEvent with select(2) and XCheckIfEvent
+- On Windows, fix malformed function pointer typecast that could invoke undefined behavior.
+- Refactored Windows state/flag-setting code.
+- On Windows, hiding the cursor no longer hides the cursor for all Winit windows - just the one `hide_cursor` was called on.
+- On Windows, cursor grabs used to get perpetually canceled when the grabbing window lost focus. Now, cursor grabs automatically get re-initialized when the window regains focus and the mouse moves over the client area.
+- On Windows, only vertical mouse wheel events were handled. Now, horizontal mouse wheel events are also handled.
+- On Windows, ignore the AltGr key when populating the `ModifersState` type.
+- On Linux, the numpad's add, subtract and divide keys are now mapped to the `Add`, `Subtract` and `Divide` virtual key codes
+- On macOS, the numpad's subtract key has been added to the `Subtract` mapping
+- On Wayland, the numpad's home, end, page up and page down keys are now mapped to the `Home`, `End`, `PageUp` and `PageDown` virtual key codes
+
+# Version 0.18.1 (2018-12-30)
+
+- On macOS, fix `Yen` (JIS) so applications receive the event.
+- On X11 with a tiling WM, fixed high CPU usage when moving windows across monitors.
+- On X11, fixed panic caused by dropping the window before running the event loop.
+- on macOS, added `WindowExt::set_simple_fullscreen` which does not require a separate space
+- Introduce `WindowBuilderExt::with_app_id` to allow setting the application ID on Wayland.
+- On Windows, catch panics in event loop child thread and forward them to the parent thread. This prevents an invocation of undefined behavior due to unwinding into foreign code.
+- On Windows, fix issue where resizing or moving window combined with grabbing the cursor would freeze program.
+- On Windows, fix issue where resizing or moving window would eat `Awakened` events.
+- On Windows, exiting fullscreen after entering fullscreen with disabled decorations no longer shrinks window.
+- On X11, fixed a segfault when using virtual monitors with XRandR.
+- Derive `Ord` and `PartialOrd` for `VirtualKeyCode` enum.
+- On Windows, fix issue where hovering or dropping a non file item would create a panic.
+- On Wayland, fix resizing and DPI calculation when a `wl_output` is removed without sending a `leave` event to the `wl_surface`, such as disconnecting a monitor from a laptop.
+- On Wayland, DPI calculation is handled by smithay-client-toolkit.
+- On X11, `WindowBuilder::with_min_dimensions` and `WindowBuilder::with_max_dimensions` now correctly account for DPI.
+- Added support for generating dummy `DeviceId`s and `WindowId`s to better support unit testing.
+- On macOS, fixed unsoundness in drag-and-drop that could result in drops being rejected.
+- On macOS, implemented `WindowEvent::Refresh`.
+- On macOS, all `MouseCursor` variants are now implemented and the cursor will no longer reset after unfocusing.
+- Removed minimum supported Rust version guarantee.
+
+# Version 0.18.0 (2018-11-07)
+
+- **Breaking:** `image` crate upgraded to 0.20. This is exposed as part of the `icon_loading` API.
+- On Wayland, pointer events will now provide the current modifiers state.
+- On Wayland, titles will now be displayed in the window header decoration.
+- On Wayland, key repetition is now ended when keyboard loses focus.
+- On Wayland, windows will now use more stylish and modern client side decorations.
+- On Wayland, windows will use server-side decorations when available.
+- **Breaking:** Added support for F16-F24 keys (variants were added to the `VirtualKeyCode` enum).
+- Fixed graphical glitches when resizing on Wayland.
+- On Windows, fix freezes when performing certain actions after a window resize has been triggered. Reintroduces some visual artifacts when resizing.
+- Updated window manager hints under X11 to v1.5 of [Extended Window Manager Hints](https://specifications.freedesktop.org/wm-spec/wm-spec-1.5.html#idm140200472629520).
+- Added `WindowBuilderExt::with_gtk_theme_variant` to X11-specific `WindowBuilder` functions.
+- Fixed UTF8 handling bug in X11 `set_title` function.
+- On Windows, `Window::set_cursor` now applies immediately instead of requiring specific events to occur first.
+- On Windows, the `HoveredFile` and `HoveredFileCancelled` events are now implemented.
+- On Windows, fix `Window::set_maximized`.
+- On Windows 10, fix transparency (#260).
+- On macOS, fix modifiers during key repeat.
+- Implemented the `Debug` trait for `Window`, `EventsLoop`, `EventsLoopProxy` and `WindowBuilder`.
+- On X11, now a `Resized` event will always be generated after a DPI change to ensure the window's logical size is consistent with the new DPI.
+- Added further clarifications to the DPI docs.
+- On Linux, if neither X11 nor Wayland manage to initialize, the corresponding panic now consists of a single line only.
+- Add optional `serde` feature with implementations of `Serialize`/`Deserialize` for DPI types and various event types.
+- Add `PartialEq`, `Eq`, and `Hash` implementations on public types that could have them but were missing them.
+- On X11, drag-and-drop receiving an unsupported drop type can no longer cause the WM to freeze.
+- Fix issue whereby the OpenGL context would not appear at startup on macOS Mojave (#1069).
+- **Breaking:** Removed `From<NSApplicationActivationPolicy>` impl from `ActivationPolicy` on macOS.
+- On macOS, the application can request the user's attention with `WindowExt::request_user_attention`.
+
+# Version 0.17.2 (2018-08-19)
+
+- On macOS, fix `<C-Tab>` so applications receive the event.
+- On macOS, fix `<Cmd-{key}>` so applications receive the event.
+- On Wayland, key press events will now be repeated.
+
+# Version 0.17.1 (2018-08-05)
+
+- On X11, prevent a compilation failure in release mode for versions of Rust greater than or equal to 1.30.
+- Fixed deadlock that broke fullscreen mode on Windows.
+
+# Version 0.17.0 (2018-08-02)
+
+- Cocoa and core-graphics updates.
+- Fixed thread-safety issues in several `Window` functions on Windows.
+- On MacOS, the key state for modifiers key events is now properly set.
+- On iOS, the view is now set correctly. This makes it possible to render things (instead of being stuck on a black screen), and touch events work again.
+- Added NetBSD support.
+- **Breaking:** On iOS, `UIView` is now the default root view. `WindowBuilderExt::with_root_view_class` can be used to set the root view objective-c class to `GLKView` (OpenGLES) or `MTKView` (Metal/MoltenVK).
+- On iOS, the `UIApplication` is not started until `Window::new` is called.
+- Fixed thread unsafety with cursor hiding on macOS.
+- On iOS, fixed the size of the `JmpBuf` type used for `setjmp`/`longjmp` calls. Previously this was a buffer overflow on most architectures.
+- On Windows, use cached window DPI instead of repeatedly querying the system. This fixes sporadic crashes on Windows 7.
+
+# Version 0.16.2 (2018-07-07)
+
+- On Windows, non-resizable windows now have the maximization button disabled. This is consistent with behavior on macOS and popular X11 WMs.
+- Corrected incorrect `unreachable!` usage when guessing the DPI factor with no detected monitors.
+
+# Version 0.16.1 (2018-07-02)
+
+- Added logging through `log`. Logging will become more extensive over time.
+- On X11 and Windows, the window's DPI factor is guessed before creating the window. This *greatly* cuts back on unsightly auto-resizing that would occur immediately after window creation.
+- Fixed X11 backend compilation for environments where `c_char` is unsigned.
+
 # Version 0.16.0 (2018-06-25)
 
 - Windows additionally has `WindowBuilderExt::with_no_redirection_bitmap`.

CONTRIBUTING.md

@@ -0,0 +1,58 @@
+# PLEASE MAKE PRs AGAINST THE `eventloop-2.0` BRANCH.
+
+All development work for our next version is being done against that branch. Refer to [#459](https://github.com/rust-windowing/winit/issues/459) and [the associated milestone](https://github.com/rust-windowing/winit/milestone/2) for details on what that branch changes.
+
+# Winit Contributing Guidelines
+
+## Scope
+[See `FEATURES.md`](./FEATURES.md). When requesting or implementing a new Winit feature, you should
+consider whether or not it's directly related to window creation or input handling. If it isn't, it
+may be worth creating a separate crate that extends Winit's API to add that functionality.
+
+
+## Reporting an issue
+
+When reporting an issue, in order to help the maintainers understand what the problem is, please make
+your description of the issue as detailed as possible:
+
+- if it is a bug, please provide clear explanation of what happens, what should happen, and how to
+  reproduce the issue, ideally by providing a minimal program exhibiting the problem
+- if it is a feature request, please provide a clear argumentation about why you believe this feature
+  should be supported by winit
+
+## Making a pull request
+
+When making a code contribution to winit, before opening your pull request, please make sure that:
+
+- you tested your modifications on all the platforms impacted, or if not possible detail which platforms
+  were not tested, and what should be tested, so that a maintainer or another contributor can test them
+- you updated any relevant documentation in winit
+- you left comments in your code explaining any part that is not straightforward, so that the
+  maintainers and future contributors don't have to try to guess what your code is supposed to do
+- your PR adds an entry to the changelog file if the introduced change is relevant to winit users
+- if your PR affects the platform compatibility of one or more features or adds another feature, the
+  relevant sections in [`FEATURES.md`](https://github.com/rust-windowing/winit/blob/master/FEATURES.md#features)
+  should be updated.
+
+Once your PR is open, you can ask for review by a maintainer of your platform. Winit's merging policy
+is that a PR must be approved by at least two maintainers of winit before being merged, including
+at least a maintainer of the platform (a maintainer making a PR themselves counts as approving it).
+
+## Maintainers & Testers
+
+Winit is managed by several people, each with their specialities, and each maintaining a subset of the
+backends of winit. As such, depending on your platform of interest, your contacts will be different.
+
+This table summarizes who can be contacted in which case, with the following legend:
+
+- `M` - Maintainer: is a main maintainer for this platform
+- `C` - Collaborator: can review code and address issues on this platform
+- `T` - Tester: has the ability of testing the platform
+- ` `: knows nothing of this platform
+
+| Platform            | Windows | macOS | X11   | Wayland | Android | iOS   | Emscripten |
+| :---                | :---:   | :---: | :---: | :---:   | :---:   | :---: | :---:      |
+| @mitchmindtree      | T       |       | T     | T       |         |       |            |
+| @Osspial            | M       |       | T     | T       | T       |       | T          |
+| @vberger            |         |       | T     | M       |         |       |            |
+| @mtak-              |         | T     |       |         | T       | M     |            |

Cargo.toml

@@ -1,17 +1,17 @@
 [package]
 name = "winit"
-version = "0.16.0"
-authors = ["The winit contributors, Pierre Krieger <pierre.krieger1708@gmail.com>"]
+version = "0.19.4"
+authors = ["The winit contributors", "Pierre Krieger <pierre.krieger1708@gmail.com>"]
 description = "Cross-platform window creation library."
 keywords = ["windowing"]
 license = "Apache-2.0"
 readme = "README.md"
-repository = "https://github.com/tomaka/winit"
+repository = "https://github.com/rust-windowing/winit"
 documentation = "https://docs.rs/winit"
 categories = ["gui"]
 
 [package.metadata.docs.rs]
-features = ["icon_loading"]
+features = ["icon_loading", "serde"]
 
 [features]
 icon_loading = ["image"]
@@ -19,42 +19,53 @@ icon_loading = ["image"]
 [dependencies]
 lazy_static = "1"
 libc = "0.2"
-image = { version = "0.19", optional = true }
+log = "0.4"
+image = { version = "0.21", optional = true }
+serde = { version = "1", optional = true, features = ["serde_derive"] }
+raw-window-handle = "0.3"
 
 [target.'cfg(target_os = "android")'.dependencies.android_glue]
 version = "0.2"
 
 [target.'cfg(target_os = "ios")'.dependencies]
-objc = "0.2"
+objc = "0.2.3"
 
 [target.'cfg(target_os = "macos")'.dependencies]
-objc = "0.2"
-cocoa = "0.15"
+objc = "0.2.3"
+cocoa = "0.18.4"
 core-foundation = "0.6"
-core-graphics = "0.14"
+core-graphics = "0.17.3"
+
+[target.'cfg(target_os = "windows")'.dependencies]
+backtrace = "0.3"
+bitflags = "1"
 
 [target.'cfg(target_os = "windows")'.dependencies.winapi]
-version = "0.3.5"
+version = "0.3.6"
 features = [
     "combaseapi",
     "dwmapi",
+    "errhandlingapi",
     "hidusage",
     "libloaderapi",
     "objbase",
+    "ole2",
     "processthreadsapi",
     "shellapi",
     "shellscalingapi",
     "shobjidl_core",
     "unknwnbase",
+    "winbase",
     "windowsx",
+    "winerror",
     "wingdi",
     "winnt",
     "winuser",
 ]
 
-[target.'cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))'.dependencies]
-wayland-client = { version = "0.20.6", features = [ "dlopen", "egl", "cursor"] }
-smithay-client-toolkit = "0.2.2"
-x11-dl = "2.17.5"
-parking_lot = "0.5"
-percent-encoding = "1.0"
+[target.'cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd", target_os = "netbsd"))'.dependencies]
+wayland-client = { version = "0.21", features = [ "dlopen", "egl", "cursor"] }
+smithay-client-toolkit = "0.4.3"
+x11-dl = "2.18.3"
+parking_lot = "0.9"
+percent-encoding = "2.0"

FEATURES.md

@@ -0,0 +1,209 @@
+# Winit Scope
+
+Winit aims to expose an interface that abstracts over window creation and input handling, and can
+be used to create both games and applications. It supports the main graphical platforms:
+- Desktop
+  - Windows
+  - macOS
+  - Unix
+    - via X11
+    - via Wayland
+- Mobile
+  - iOS
+  - Android
+- Web
+  - via Emscripten
+  - via WASM
+
+Most platforms expose capabilities that cannot be meaningfully transposed onto others. Winit does not
+aim to support every single feature of every platform, but rather to abstract over the common features
+available everywhere. In this context, APIs exposed in winit can be split into different "support tiers":
+
+- **Core:** Features that are essential to providing a well-formed abstraction over each platform's
+  windowing and input APIs.
+- **Platform:** Platform-specific features that can't be meaningfully exposed through a common API and
+  cannot be implemented outside of Winit without exposing a significant amount of Winit's internals
+  or interfering with Winit's abstractions.
+- **Usability:** Features that are not strictly essential to Winit's functionality, but provide meaningful
+  usability improvements and cannot be reasonably implemented in an external crate. These are
+  generally optional and exposed through Cargo features.
+
+Core features are taken care of by the core Winit maintainers. Platform features are not.
+When a platform feature is submitted, the submitter is considered the expert in the
+feature and may be asked to support the feature should it break in the future.
+
+Winit ***does not*** directly expose functionality for drawing inside windows or creating native
+menus, but ***does*** commit to providing APIs that higher-level crates can use to implement that
+functionality.
+
+## `1.0` and stability
+
+When all core features are implemented to the satisfaction of the Winit maintainers, Winit 1.0 will
+be released and the library will enter maintenance mode. For the most part, new core features will not
+be added past this point. New platform features may be accepted and exposed through point releases.
+
+### Tier upgrades
+Some platform features could in theory be exposed across multiple platforms, but have not gone
+through the implementation work necessary to function on all platforms. When one of these features
+gets implemented across all platforms, a PR can be opened to upgrade the feature to a core feature.
+If that gets accepted, the platform-specific functions gets deprecated and become permanently
+exposed through the core, cross-platform API.
+
+# Features
+
+## Extending this section
+
+If your PR makes notable changes to Winit's features, please update this section as follows:
+
+- If your PR adds a new feature, add a brief description to the relevant section. If the feature is a core
+  feature, add a row to the feature matrix and describe what platforms the feature has been implemented on.
+
+- If your PR begins a new API rework, add a row to the `Pending API Reworks` table. If the PR implements the
+  API rework on all relevant platforms, please move it to the `Completed API Reworks` table.
+
+- If your PR implements an already-existing feature on a new platform, either mark the feature as *completed*,
+  or mark it as *mostly completed* and link to an issue describing the problems with the implementation.
+
+## Core
+
+### Windowing
+- **Window initialization**: Winit allows the creation of a window
+- **Providing pointer to init OpenGL**: Winit provides the necessary pointers to initialize a working opengl context
+- **Providing pointer to init Vulkan**: Same as OpenGL but for Vulkan
+- **Window decorations**: The windows created by winit are properly decorated, and the decorations can
+  be deactivated
+- **Window decorations toggle**: Decorations can be turned on or off after window creation
+- **Window resizing**: The windows created by winit can be resized and generate the appropriate events
+  when they are. The application can precisely control its window size if desired.
+- **Window resize increments**: When the window gets resized, the application can choose to snap the window's
+  size to specific values.
+- **Window transparency**: Winit allows the creation of windows with a transparent background.
+- **Window maximization**: The windows created by winit can be maximized upon creation.
+- **Window maximization toggle**: The windows created by winit can be maximized and unmaximized after
+  creation.
+- **Fullscreen**: The windows created by winit can be put into fullscreen mode.
+- **Fullscreen toggle**: The windows created by winit can be switched to and from fullscreen after
+  creation.
+- **HiDPI support**: Winit assists developers in appropriately scaling HiDPI content.
+- **Popup / modal windows**: Windows can be created relative to the client area of other windows, and parent
+  windows can be disabled in favor of popup windows. This feature also guarantees that popup windows
+  get drawn above their owner.
+
+
+### System Information
+- **Monitor list**: Retrieve the list of monitors and their metadata, including which one is primary.
+
+### Input Handling
+- **Mouse events**: Generating mouse events associated with pointer motion, click, and scrolling events.
+- **Mouse set location**: Forcibly changing the location of the pointer.
+- **Cursor grab**: Locking the cursor so it cannot exit the client area of a window.
+- **Cursor icon**: Changing the cursor icon, or hiding the cursor.
+- **Touch events**: Single-touch events.
+- **Multitouch**: Multi-touch events, including cancellation of a gesture.
+- **Keyboard events**: Properly processing keyboard events using the user-specified keymap and
+  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.
+
+## Platform
+### Windows
+* Setting the taskbar icon
+* Setting the parent window
+* `WS_EX_NOREDIRECTIONBITMAP` support
+
+### macOS
+* Window activation policy
+* Window movable by background
+* Transparent titlebar
+* Hidden titlebar
+* Hidden titlebar buttons
+* Full-size content view
+
+### Unix
+* Window urgency
+* X11 Window Class
+* X11 Override Redirect Flag
+* GTK Theme Variant
+* Base window size
+
+## Usability
+* `serde`: Enables serialization/deserialization of certain types with Serde. (Maintainer: @Osspial)
+
+## Compatibility Matrix
+
+Legend:
+
+- ✔️: Works as intended
+- ▢: Mostly works but some bugs are known
+- ❌: Missing feature or large bugs making it unusable
+- **N/A**: Not applicable for this platform
+- ❓: Unknown status
+
+### Windowing
+|Feature                          |Windows|MacOS   |Linux x11   |Linux Wayland  |Android|iOS    |Emscripten|
+|-------------------------------- | ----- | ----   | -------    | -----------   | ----- | ----- | -------- |
+|Window initialization            |✔️     |✔️     |▢[#5]      |✔️             |▢[#33]|▢[#33] |❓        |
+|Providing pointer to init OpenGL |✔️     |✔️     |✔️         |✔️             |✔️     |✔️    |❓        |
+|Providing pointer to init Vulkan |✔️     |✔️     |✔️         |✔️             |✔️     |❓     |**N/A**   |
+|Window decorations               |✔️     |✔️     |✔️         |▢[#306]        |**N/A**|**N/A**|**N/A**   |
+|Window decorations toggle        |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|**N/A**   |
+|Window resizing                  |✔️     |▢[#219]|✔️         |▢[#306]        |**N/A**|**N/A**|❓        |
+|Window resize increments         |❌     |❌     |❌         |❌             |❌    |❌     |❌        |
+|Window transparency              |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|**N/A**   |
+|Window maximization              |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|**N/A**   |
+|Window maximization toggle       |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|**N/A**   |
+|Fullscreen                       |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|❌        |
+|Fullscreen toggle                |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|❌        |
+|HiDPI support                    |✔️     |✔️     |✔️         |✔️             |▢[#721]|✔️    |✔️         |
+|Popup windows                    |❌     |❌     |❌         |❌             |❌    |❌     |❌        |
+
+### System information
+|Feature      |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS    |Emscripten|
+|------------ | ----- | ---- | ------- | ----------- | ----- | ----- | -------- |
+|Monitor list |✔️    |✔️    |✔️       |✔️          |**N/A**|**N/A**|**N/A**   |
+
+### Input handling
+|Feature                 |Windows   |MacOS   |Linux x11|Linux Wayland|Android|iOS    |Emscripten|
+|----------------------- | -----    | ----   | ------- | ----------- | ----- | ----- | -------- |
+|Mouse events            |✔️       |▢[#63]  |✔️       |✔️          |**N/A**|**N/A**|✔️       |
+|Mouse set location      |✔️       |✔️      |✔️       |❓           |**N/A**|**N/A**|**N/A**  |
+|Cursor grab             |✔️       |▢[#165] |▢[#242]  |❌[#306]    |**N/A**|**N/A**|✔️       |
+|Cursor icon             |✔️       |✔️      |✔️       |❌[#306]    |**N/A**|**N/A**|❌       |
+|Touch events            |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |✔️       |
+|Multitouch              |❓        |❌      |✔️       |✔️          |❓     |❌     |❌       |
+|Keyboard events         |✔️       |✔️      |✔️       |✔️          |❓     |❌     |✔️       |
+|Drag & Drop             |▢[#720]  |▢[#720] |▢[#720]  |❌[#306]    |**N/A**|**N/A**|❓        |
+|Raw Device Events       |▢[#750]  |▢[#750] |▢[#750]  |❌          |❌    |❌     |❌       |
+|Gamepad/Joystick events |❌[#804] |❌      |❌       |❌          |❌    |❌     |❌       |
+|Device movement events  |❓        |❓       |❓       |❓           |❌    |❌     |❌       |
+
+### Pending API Reworks
+Changes in the API that have been agreed upon but aren't implemented across all platforms.
+
+|Feature                             |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS    |Emscripten|
+|------------------------------      | ----- | ---- | ------- | ----------- | ----- | ----- | -------- |
+|New API for HiDPI ([#315] [#319])   |✔️    |✔️    |✔️       |✔️          |▢[#721]|✔️    |✔️       |
+|Event Loop 2.0 ([#459])             |✔️    |❌    |❌       |✔️          |❌     |❌    |❌       |
+|Keyboard Input ([#812])             |❌    |❌    |❌       |❌          |❌     |❌     |❌      |
+
+### Completed API Reworks
+|Feature                             |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS    |Emscripten|
+|------------------------------      | ----- | ---- | ------- | ----------- | ----- | ----- | -------- |
+
+[#165]: https://github.com/rust-windowing/winit/issues/165
+[#219]: https://github.com/rust-windowing/winit/issues/219
+[#242]: https://github.com/rust-windowing/winit/issues/242
+[#306]: https://github.com/rust-windowing/winit/issues/306
+[#315]: https://github.com/rust-windowing/winit/issues/315
+[#319]: https://github.com/rust-windowing/winit/issues/319
+[#33]: https://github.com/rust-windowing/winit/issues/33
+[#459]: https://github.com/rust-windowing/winit/issues/459
+[#5]: https://github.com/rust-windowing/winit/issues/5
+[#63]: https://github.com/rust-windowing/winit/issues/63
+[#720]: https://github.com/rust-windowing/winit/issues/720
+[#721]: https://github.com/rust-windowing/winit/issues/721
+[#750]: https://github.com/rust-windowing/winit/issues/750
+[#804]: https://github.com/rust-windowing/winit/issues/804
+[#812]: https://github.com/rust-windowing/winit/issues/812

HALL_OF_CHAMPIONS.md

@@ -0,0 +1,11 @@
+# Hall of Champions
+
+The Winit maintainers would like to recognize the following former Winit
+contributors, without whom Winit would not exist in its current form. We thank
+them deeply for their time and efforts, and wish them best of luck in their
+future endeavors:
+
+* @tomaka: For creating the Winit project and guiding it through its early
+  years of existence.
+* @francesca64: For taking over the responsibility of maintaining almost every
+  Winit backend, and standardizing HiDPI support across all of them

README.md

@@ -1,19 +1,35 @@
+# This branch has been archived
+
+Please direct all work against `master`.
+
+--------
+
 # winit - Cross-platform window creation and management in Rust
 
-[![](http://meritbadge.herokuapp.com/winit)](https://crates.io/crates/winit)
-
+[![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/tomaka/winit.svg?branch=master)](https://travis-ci.org/tomaka/winit)
-[![Build status](https://ci.appveyor.com/api/projects/status/5h87hj0g4q2xe3j9/branch/master?svg=true)](https://ci.appveyor.com/project/tomaka/winit/branch/master)
+[![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)
 
 ```toml
 [dependencies]
-winit = "0.16"
+winit = "0.19.3"
 ```
 
 ## [Documentation](https://docs.rs/winit)
 
+For features _within_ the scope of winit, see [FEATURES.md](FEATURES.md).
+
+For features _outside_ the scope of winit, see [Missing features provided by other crates](https://github.com/rust-windowing/winit/wiki/Missing-features-provided-by-other-crates) in the wiki.
+
+## Contact Us
+
+Join us in any of these:
+
+[![Freenode](https://img.shields.io/badge/freenode.net-%23glutin-red.svg)](http://webchat.freenode.net?channels=%23glutin&uio=MTY9dHJ1ZSYyPXRydWUmND10cnVlJjExPTE4NSYxMj10cnVlJjE1PXRydWU7a)
+[![Matrix](https://img.shields.io/badge/Matrix-%23Glutin%3Amatrix.org-blueviolet.svg)](https://matrix.to/#/#Glutin:matrix.org)
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/tomaka/glutin?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
 ## Usage
 
 Winit is a window creation and management library. It can create windows and lets you handle
@@ -43,6 +59,14 @@ fn main() {
 }
 ```
 
+Winit is only officially supported on the latest stable version of the Rust compiler.
+
+### Cargo Features
+
+Winit provides the following features, which can be enabled in your `Cargo.toml` file:
+* `icon_loading`: Enables loading window icons directly from files. Depends on the [`image` crate](https://crates.io/crates/image).
+* `serde`: Enables serialization/deserialization of certain types with [Serde](https://crates.io/crates/serde).
+
 ### Platform-specific usage
 
 #### Emscripten and WebAssembly

appveyor.yml

@@ -4,8 +4,6 @@ environment:
     CHANNEL: nightly
   - TARGET: x86_64-pc-windows-msvc
     CHANNEL: stable
-  - TARGET: x86_64-pc-windows-msvc
-    CHANNEL: 1.24.1
   - TARGET: i686-pc-windows-msvc
     CHANNEL: nightly
   - TARGET: i686-pc-windows-gnu
@@ -22,3 +20,5 @@ build: false
 
 test_script:
   - cargo test --verbose
+  - cargo test --features serde --verbose
+  - cargo test --features icon_loading --verbose

examples/fullscreen.rs

@@ -6,35 +6,46 @@ use winit::{ControlFlow, Event, WindowEvent};
 fn main() {
     let mut events_loop = winit::EventsLoop::new();
 
-    // enumerating monitors
+    #[cfg(target_os = "macos")]
+    let mut macos_use_simple_fullscreen = false;
+
     let monitor = {
-        for (num, monitor) in events_loop.get_available_monitors().enumerate() {
-            println!("Monitor #{}: {:?}", num, monitor.get_name());
+        // On macOS there are two fullscreen modes "native" and "simple"
+        #[cfg(target_os = "macos")]
+        {
+            print!("Please choose the fullscreen mode: (1) native, (2) simple: ");
+            io::stdout().flush().unwrap();
+
+            let mut num = String::new();
+            io::stdin().read_line(&mut num).unwrap();
+            let num = num.trim().parse().ok().expect("Please enter a number");
+            match num {
+                2 => macos_use_simple_fullscreen = true,
+                _ => {}
+            }
+
+            // Prompt for monitor when using native fullscreen
+            if !macos_use_simple_fullscreen {
+                Some(prompt_for_monitor(&events_loop))
+            } else {
+                None
+            }
         }
 
-        print!("Please write the number of the monitor to use: ");
-        io::stdout().flush().unwrap();
-
-        let mut num = String::new();
-        io::stdin().read_line(&mut num).unwrap();
-        let num = num.trim().parse().ok().expect("Please enter a number");
-        let monitor = events_loop.get_available_monitors().nth(num).expect("Please enter a valid ID");
-
-        println!("Using {:?}", monitor.get_name());
-
-        monitor
+        #[cfg(not(target_os = "macos"))]
+        Some(prompt_for_monitor(&events_loop))
     };
 
+    let mut is_fullscreen = monitor.is_some();
+    let mut is_maximized = false;
+    let mut decorations = true;
+
     let window = winit::WindowBuilder::new()
         .with_title("Hello world!")
-        .with_fullscreen(Some(monitor))
+        .with_fullscreen(monitor)
         .build(&events_loop)
         .unwrap();
 
-    let mut is_fullscreen = true;
-    let mut is_maximized = false;
-    let mut decorations = true;
-
     events_loop.run_forever(|event| {
         println!("{:?}", event);
 
@@ -52,6 +63,18 @@ fn main() {
                 } => match (virtual_code, state) {
                     (winit::VirtualKeyCode::Escape, _) => return ControlFlow::Break,
                     (winit::VirtualKeyCode::F, winit::ElementState::Pressed) => {
+                        #[cfg(target_os = "macos")]
+                        {
+                            if macos_use_simple_fullscreen {
+                                use winit::os::macos::WindowExt;
+                                if WindowExt::set_simple_fullscreen(&window, !is_fullscreen) {
+                                    is_fullscreen = !is_fullscreen;
+                                }
+
+                                return ControlFlow::Continue;
+                            }
+                        }
+
                         is_fullscreen = !is_fullscreen;
                         if !is_fullscreen {
                             window.set_fullscreen(None);
@@ -59,6 +82,15 @@ fn main() {
                             window.set_fullscreen(Some(window.get_current_monitor()));
                         }
                     }
+                    (winit::VirtualKeyCode::S, winit::ElementState::Pressed) => {
+                        println!("window.get_fullscreen {:?}", window.get_fullscreen());
+
+                        #[cfg(target_os = "macos")]
+                        {
+                            use winit::os::macos::WindowExt;
+                            println!("window.get_simple_fullscreen {:?}", WindowExt::get_simple_fullscreen(&window));
+                        }
+                    }
                     (winit::VirtualKeyCode::M, winit::ElementState::Pressed) => {
                         is_maximized = !is_maximized;
                         window.set_maximized(is_maximized);
@@ -77,3 +109,22 @@ fn main() {
         ControlFlow::Continue
     });
 }
+
+// Enumerate monitors and prompt user to choose one
+fn prompt_for_monitor(events_loop: &winit::EventsLoop) -> winit::MonitorId {
+    for (num, monitor) in events_loop.get_available_monitors().enumerate() {
+        println!("Monitor #{}: {:?}", num, monitor.get_name());
+    }
+
+    print!("Please write the number of the monitor to use: ");
+    io::stdout().flush().unwrap();
+
+    let mut num = String::new();
+    io::stdin().read_line(&mut num).unwrap();
+    let num = num.trim().parse().ok().expect("Please enter a number");
+    let monitor = events_loop.get_available_monitors().nth(num).expect("Please enter a valid ID");
+
+    println!("Using {:?}", monitor.get_name());
+
+    monitor
+}

examples/window_icon.rs

@@ -6,10 +6,9 @@ extern crate winit;
 #[cfg(feature = "icon_loading")]
 extern crate image;
 
-use winit::Icon;
-
 #[cfg(feature = "icon_loading")]
 fn main() {
+    use winit::Icon;
     // You'll have to choose an icon size at your own discretion. On X11, the desired size varies
     // by WM, and on Windows, you still have to account for screen scaling. Here we use 32px,
     // since it seems to work well enough in most cases. Be careful about going too high, or
@@ -37,7 +36,7 @@ fn main() {
             match event {
                 CloseRequested => return winit::ControlFlow::Break,
                 DroppedFile(path) => {
-                    use image::GenericImage;
+                    use image::GenericImageView;
 
                     let icon_image = image::open(path).expect("Failed to open window icon");
 

src/dpi.rs

@@ -19,19 +19,29 @@
 //! small.
 //!
 //! That's a description of what happens when the button is 100x100 *physical* pixels. Instead, let's try using 100x100
-//! *logical* pixels. To map logical pixels to physical pixels, we simply multiply by the DPI factor. On a "typical"
-//! desktop display, the DPI factor will be 1.0, so 100x100 logical pixels equates to 100x100 physical pixels. However,
-//! a 1440p display may have a DPI factor of 1.25, so the button is rendered as 125x125 physical pixels. Ideally, the
-//! button now has approximately the same perceived size across varying displays.
+//! *logical* pixels. To map logical pixels to physical pixels, we simply multiply by the DPI (dots per inch) factor.
+//! On a "typical" desktop display, the DPI factor will be 1.0, so 100x100 logical pixels equates to 100x100 physical
+//! pixels. However, a 1440p display may have a DPI factor of 1.25, so the button is rendered as 125x125 physical pixels.
+//! Ideally, the button now has approximately the same perceived size across varying displays.
 //!
 //! Failure to account for the DPI factor can create a badly degraded user experience. Most notably, it can make users
 //! feel like they have bad eyesight, which will potentially cause them to think about growing elderly, resulting in
 //! them entering an existential panic. Once users enter that state, they will no longer be focused on your application.
 //!
-//! There are two ways to get the DPI factor: either by calling
-//! [`MonitorId::get_hidpi_factor`](../struct.MonitorId.html#method.get_hidpi_factor), or
-//! [`Window::get_hidpi_factor`](../struct.Window.html#method.get_hidpi_factor). You'll almost always use the latter,
-//! which is basically equivalent to `window.get_current_monitor().get_hidpi_factor()` anyway.
+//! There are two ways to get the DPI factor:
+//! - You can track the [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged) event of your
+//!   windows. This event is sent any time the DPI factor changes, either because the window moved to another monitor,
+//!   or because the user changed the configuration of their screen.
+//! - You can also retrieve the DPI factor of a monitor by calling
+//!   [`MonitorId::get_hidpi_factor`](../struct.MonitorId.html#method.get_hidpi_factor), or the
+//!   current DPI factor applied to a window by calling
+//!   [`Window::get_hidpi_factor`](../struct.Window.html#method.get_hidpi_factor), which is roughly equivalent
+//!   to `window.get_current_monitor().get_hidpi_factor()`.
+//!
+//! Depending on the platform, the window's actual DPI factor may only be known after
+//! the event loop has started and your window has been drawn once. To properly handle these cases,
+//! the most robust way is to monitor the [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged)
+//! event and dynamically adapt your drawing logic to follow the DPI factor.
 //!
 //! Here's an overview of what sort of DPI factors you can expect, and where they come from:
 //! - **Windows:** On Windows 8 and 10, per-monitor scaling is readily configured by users from the display settings.
@@ -43,18 +53,28 @@
 //! - **X11:** On X11, we calcuate the DPI factor based on the millimeter dimensions provided by XRandR. This can
 //! result in a wide range of possible values, including some interesting ones like 1.0833333333333333. This can be
 //! overridden using the `WINIT_HIDPI_FACTOR` environment variable, though that's not recommended.
-//! - **Wayland:** On Wayland, DPI factors are very much at the discretion of the user.
+//! - **Wayland:** On Wayland, DPI factors are set per-screen by the server, and are always integers (most often 1 or 2).
 //! - **iOS:** DPI factors are both constant and device-specific on iOS.
 //! - **Android:** This feature isn't yet implemented on Android, so the DPI factor will always be returned as 1.0.
 //!
 //! The window's logical size is conserved across DPI changes, resulting in the physical size changing instead. This
-//! may be surprising on X11, but is quite standard elsewhere. Physical size changes produce a
+//! may be surprising on X11, but is quite standard elsewhere. Physical size changes always produce a
 //! [`Resized`](../enum.WindowEvent.html#variant.Resized) event, even on platforms where no resize actually occurs,
 //! such as macOS and Wayland. As a result, it's not necessary to separately handle
 //! [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged) if you're only listening for size.
 //!
 //! Your GPU has no awareness of the concept of logical pixels, and unless you like wasting pixel density, your
 //! framebuffer's size should be in physical pixels.
+//!
+//! `winit` will send [`Resized`](../enum.WindowEvent.html#variant.Resized) events whenever a window's logical size
+//! changes, and [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged) events
+//! whenever the DPI factor changes. Receiving either of these events means that the physical size of your window has
+//! changed, and you should recompute it using the latest values you received for each. If the logical size and the
+//! DPI factor change simultaneously, `winit` will send both events together; thus, it's recommended to buffer
+//! these events and process them at the end of the queue.
+//!
+//! If you never received any [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged) events,
+//! then your window's DPI factor is 1.
 
 /// Checks that the DPI factor is a normal positive `f64`.
 ///
@@ -72,6 +92,7 @@ pub fn validate_hidpi_factor(dpi_factor: f64) -> bool {
 /// which can cause noticable issues. To help with that, an `Into<(i32, i32)>` implementation is provided which
 /// does the rounding for you.
 #[derive(Debug, Copy, Clone, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct LogicalPosition {
     pub x: f64,
     pub y: f64,
@@ -132,6 +153,7 @@ impl Into<(i32, i32)> for LogicalPosition {
 /// which can cause noticable issues. To help with that, an `Into<(i32, i32)>` implementation is provided which
 /// does the rounding for you.
 #[derive(Debug, Copy, Clone, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct PhysicalPosition {
     pub x: f64,
     pub y: f64,
@@ -192,6 +214,7 @@ impl Into<(i32, i32)> for PhysicalPosition {
 /// which can cause noticable issues. To help with that, an `Into<(u32, u32)>` implementation is provided which
 /// does the rounding for you.
 #[derive(Debug, Copy, Clone, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct LogicalSize {
     pub width: f64,
     pub height: f64,
@@ -252,6 +275,7 @@ impl Into<(u32, u32)> for LogicalSize {
 /// which can cause noticable issues. To help with that, an `Into<(u32, u32)>` implementation is provided which
 /// does the rounding for you.
 #[derive(Debug, Copy, Clone, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct PhysicalSize {
     pub width: f64,
     pub height: f64,

src/events.rs

@@ -3,7 +3,7 @@ use std::path::PathBuf;
 use {DeviceId, LogicalPosition, LogicalSize, WindowId};
 
 /// Describes a generic event.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub enum Event {
     WindowEvent {
         window_id: WindowId,
@@ -22,7 +22,7 @@ pub enum Event {
 }
 
 /// Describes an event from a `Window`.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub enum WindowEvent {
     /// The size of the window has changed. Contains the client area's new dimensions.
     Resized(LogicalSize),
@@ -37,12 +37,21 @@ pub enum WindowEvent {
     Destroyed,
 
     /// A file has been dropped into the window.
+    /// 
+    /// When the user drops multiple files at once, this event will be emitted for each file
+    /// separately.
     DroppedFile(PathBuf),
 
     /// A file is being hovered over the window.
+    /// 
+    /// When the user hovers multiple files at once, this event will be emitted for each file
+    /// separately.
     HoveredFile(PathBuf),
 
     /// A file was hovered, but has exited the window.
+    /// 
+    /// There will be a single `HoveredFileCancelled` event triggered even if multiple files were
+    /// hovered.
     HoveredFileCancelled,
 
     /// The window received a unicode character.
@@ -116,7 +125,7 @@ pub enum WindowEvent {
 /// may not match.
 ///
 /// Note that these events are delivered regardless of input focus.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub enum DeviceEvent {
     Added,
     Removed,
@@ -147,7 +156,8 @@ pub enum DeviceEvent {
 }
 
 /// Describes a keyboard input event.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct KeyboardInput {
     /// Identifies the physical key pressed
     ///
@@ -173,6 +183,7 @@ pub struct KeyboardInput {
 
 /// Describes touch-screen input state.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum TouchPhase {
     Started,
     Moved,
@@ -195,7 +206,7 @@ pub enum TouchPhase {
 /// as previously received End event is a new finger and has nothing to do with an old one.
 ///
 /// Touch may be cancelled if for example window lost focus.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Touch {
     pub device_id: DeviceId,
     pub phase: TouchPhase,
@@ -215,6 +226,7 @@ pub type ButtonId = u32;
 
 /// Describes the input state of a key.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum ElementState {
     Pressed,
     Released,
@@ -222,6 +234,7 @@ pub enum ElementState {
 
 /// Describes a button of a mouse controller.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MouseButton {
     Left,
     Right,
@@ -231,6 +244,7 @@ pub enum MouseButton {
 
 /// Describes a difference in the mouse scroll wheel state.
 #[derive(Debug, Clone, Copy, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MouseScrollDelta {
 	/// Amount in lines or rows to scroll in the horizontal
 	/// and vertical directions.
@@ -248,8 +262,9 @@ pub enum MouseScrollDelta {
 }
 
 /// Symbolic name for a keyboard key.
-#[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, Hash, Ord, PartialOrd, PartialEq, Eq, Clone, Copy)]
 #[repr(u32)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum VirtualKeyCode {
     /// The '1' key over the letters.
     Key1,
@@ -317,6 +332,15 @@ pub enum VirtualKeyCode {
     F13,
     F14,
     F15,
+    F16,
+    F17,
+    F18,
+    F19,
+    F20,
+    F21,
+    F22,
+    F23,
+    F24,
 
     /// Print Screen/SysRq.
     Snapshot,
@@ -440,6 +464,8 @@ pub enum VirtualKeyCode {
 ///
 /// Each field of this struct represents a modifier and is `true` if this modifier is active.
 #[derive(Default, Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(default))]
 pub struct ModifiersState {
     /// The "shift" key
     pub shift: bool,

src/icon.rs

@@ -146,7 +146,7 @@ impl Icon {
 /// Requires the `icon_loading` feature.
 impl From<image::DynamicImage> for Icon {
     fn from(image: image::DynamicImage) -> Self {
-        use image::{GenericImage, Pixel};
+        use image::{GenericImageView, Pixel};
         let (width, height) = image.dimensions();
         let mut rgba = Vec::with_capacity((width * height) as usize * PIXEL_SIZE);
         for (_, _, pixel) in image.pixels() {

src/lib.rs

@@ -25,11 +25,11 @@
 //! Once a window has been created, it will *generate events*. For example whenever the user moves
 //! the window, resizes the window, moves the mouse, etc. an event is generated.
 //!
-//! The events generated by a window can be retreived from the `EventsLoop` the window was created
+//! The events generated by a window can be retrieved from the `EventsLoop` the window was created
 //! with.
 //!
 //! There are two ways to do so. The first is to call `events_loop.poll_events(...)`, which will
-//! retreive all the events pending on the windows and immediately return after no new event is
+//! retrieve all the events pending on the windows and immediately return after no new event is
 //! available. You usually want to use this method in application that render continuously on the
 //! screen, such as video games.
 //!
@@ -80,7 +80,7 @@
 //! # Drawing on the window
 //!
 //! Winit doesn't provide any function that allows drawing on a window. However it allows you to
-//! retreive the raw handle of the window (see the `os` module for that), which in turn allows you
+//! retrieve the raw handle of the window (see the `os` module for that), which in turn allows you
 //! to create an OpenGL/Vulkan/DirectX/Metal/etc. context that will draw on the window.
 //!
 
@@ -88,11 +88,21 @@
 #[macro_use]
 extern crate lazy_static;
 extern crate libc;
+#[macro_use]
+extern crate log;
 #[cfg(feature = "icon_loading")]
 extern crate image;
+#[cfg(feature = "serde")]
+#[macro_use]
+extern crate serde;
 
 #[cfg(target_os = "windows")]
 extern crate winapi;
+#[cfg(target_os = "windows")]
+extern crate backtrace;
+#[macro_use]
+#[cfg(target_os = "windows")]
+extern crate bitflags;
 #[cfg(any(target_os = "macos", target_os = "ios"))]
 #[macro_use]
 extern crate objc;
@@ -102,14 +112,15 @@ extern crate cocoa;
 extern crate core_foundation;
 #[cfg(target_os = "macos")]
 extern crate core_graphics;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 extern crate x11_dl;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 extern crate parking_lot;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 extern crate percent_encoding;
-#[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "dragonfly", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 extern crate smithay_client_toolkit as sctk;
+extern crate raw_window_handle;
 
 pub(crate) use dpi::*; // TODO: Actually change the imports throughout the codebase.
 pub use events::*;
@@ -147,6 +158,12 @@ pub struct Window {
     window: platform::Window,
 }
 
+impl std::fmt::Debug for Window {
+    fn fmt(&self, fmtr: &mut std::fmt::Formatter) -> std::fmt::Result {
+        fmtr.pad("Window { .. }")
+    }
+}
+
 /// Identifier of a window. Unique for each window.
 ///
 /// Can be obtained with `window.id()`.
@@ -156,6 +173,17 @@ pub struct Window {
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct WindowId(platform::WindowId);
 
+impl WindowId {
+    /// Returns a dummy `WindowId`, useful for unit testing. The only guarantee made about the return
+    /// value of this function is that it will always be equal to itself and to future values returned
+    /// by this function.  No other guarantees are made. This may be equal to a real `WindowId`.
+    ///
+    /// **Passing this into a winit function will result in undefined behavior.**
+    pub unsafe fn dummy() -> Self {
+        WindowId(platform::WindowId::dummy())
+    }
+}
+
 /// Identifier of an input device.
 ///
 /// Whenever you receive an event arising from a particular input device, this event contains a `DeviceId` which
@@ -164,7 +192,18 @@ pub struct WindowId(platform::WindowId);
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId(platform::DeviceId);
 
-/// Provides a way to retreive events from the system and from the windows that were registered to
+impl DeviceId {
+    /// Returns a dummy `DeviceId`, useful for unit testing. The only guarantee made about the return
+    /// value of this function is that it will always be equal to itself and to future values returned
+    /// by this function.  No other guarantees are made. This may be equal to a real `DeviceId`.
+    ///
+    /// **Passing this into a winit function will result in undefined behavior.**
+    pub unsafe fn dummy() -> Self {
+        DeviceId(platform::DeviceId::dummy())
+    }
+}
+
+/// Provides a way to retrieve events from the system and from the windows that were registered to
 /// the events loop.
 ///
 /// An `EventsLoop` can be seen more or less as a "context". Calling `EventsLoop::new()`
@@ -182,10 +221,17 @@ pub struct EventsLoop {
     _marker: ::std::marker::PhantomData<*mut ()> // Not Send nor Sync
 }
 
+impl std::fmt::Debug for EventsLoop {
+    fn fmt(&self, fmtr: &mut std::fmt::Formatter) -> std::fmt::Result {
+        fmtr.pad("EventsLoop { .. }")
+    }
+}
+
 /// Returned by the user callback given to the `EventsLoop::run_forever` method.
 ///
 /// Indicates whether the `run_forever` method should continue or complete.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum ControlFlow {
     /// Continue looping and waiting for events.
     Continue,
@@ -261,6 +307,12 @@ pub struct EventsLoopProxy {
     events_loop_proxy: platform::EventsLoopProxy,
 }
 
+impl std::fmt::Debug for EventsLoopProxy {
+    fn fmt(&self, fmtr: &mut std::fmt::Formatter) -> std::fmt::Result {
+        fmtr.pad("EventsLoopProxy { .. }")
+    }
+}
+
 impl EventsLoopProxy {
     /// Wake up the `EventsLoop` from which this proxy was created.
     ///
@@ -299,6 +351,14 @@ pub struct WindowBuilder {
     platform_specific: platform::PlatformSpecificWindowBuilderAttributes,
 }
 
+impl std::fmt::Debug for WindowBuilder {
+    fn fmt(&self, fmtr: &mut std::fmt::Formatter) -> std::fmt::Result {
+        fmtr.debug_struct("WindowBuilder")
+            .field("window", &self.window)
+            .finish()
+    }
+}
+
 /// Error that can happen while creating a window or a headless renderer.
 #[derive(Debug, Clone)]
 pub enum CreationError {
@@ -329,7 +389,8 @@ impl std::error::Error for CreationError {
 }
 
 /// Describes the appearance of the mouse cursor.
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MouseCursor {
     /// The platform-dependent default cursor.
     Default,

src/os/ios.rs

@@ -2,7 +2,7 @@
 
 use std::os::raw::c_void;
 
-use {MonitorId, Window};
+use {MonitorId, Window, WindowBuilder};
 
 /// Additional methods on `Window` that are specific to iOS.
 pub trait WindowExt {
@@ -29,6 +29,22 @@ impl WindowExt for Window {
     }
 }
 
+/// Additional methods on `WindowBuilder` that are specific to iOS.
+pub trait WindowBuilderExt {
+    /// Sets the root view class used by the `Window`, otherwise a barebones `UIView` is provided.
+    ///
+    /// The class will be initialized by calling `[root_view initWithFrame:CGRect]`
+    fn with_root_view_class(self, root_view_class: *const c_void) -> WindowBuilder;
+}
+
+impl WindowBuilderExt for WindowBuilder {
+    #[inline]
+    fn with_root_view_class(mut self, root_view_class: *const c_void) -> WindowBuilder {
+        self.platform_specific.root_view_class = unsafe { &*(root_view_class as *const _) };
+        self
+    }
+}
+
 /// Additional methods on `MonitorId` that are specific to iOS.
 pub trait MonitorIdExt {
     /// Returns a pointer to the `UIScreen` that is used by this monitor.

src/os/macos.rs

@@ -1,8 +1,6 @@
 #![cfg(target_os = "macos")]
 
-use std::convert::From;
 use std::os::raw::c_void;
-use cocoa::appkit::NSApplicationActivationPolicy;
 use {LogicalSize, MonitorId, Window, WindowBuilder};
 
 /// Additional methods on `Window` that are specific to MacOS.
@@ -16,6 +14,26 @@ pub trait WindowExt {
     ///
     /// The pointer will become invalid when the `Window` is destroyed.
     fn get_nsview(&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.
+    ///
+    /// The `is_critical` flag has the following effects:
+    /// - `false`: the dock icon will only bounce once.
+    /// - `true`: the dock icon will bounce until the application is focused.
+    fn request_user_attention(&self, is_critical: bool);
+
+    /// Returns whether or not the window is in simple fullscreen mode.
+    fn get_simple_fullscreen(&self) -> bool;
+
+    /// Toggles a fullscreen mode that doesn't require a new macOS space.
+    /// Returns a boolean indicating whether the transition was successful (this
+    /// won't work if the window was already in the native fullscreen).
+    ///
+    /// This is how fullscreen used to work on macOS in versions before Lion.
+    /// 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;
 }
 
 impl WindowExt for Window {
@@ -28,6 +46,21 @@ impl WindowExt for Window {
     fn get_nsview(&self) -> *mut c_void {
         self.window.get_nsview()
     }
+
+    #[inline]
+    fn request_user_attention(&self, is_critical: bool) {
+        self.window.request_user_attention(is_critical)
+    }
+
+    #[inline]
+    fn get_simple_fullscreen(&self) -> bool {
+        self.window.get_simple_fullscreen()
+    }
+
+    #[inline]
+    fn set_simple_fullscreen(&self, fullscreen: bool) -> bool {
+        self.window.set_simple_fullscreen(fullscreen)
+    }
 }
 
 /// Corresponds to `NSApplicationActivationPolicy`.
@@ -47,19 +80,6 @@ impl Default for ActivationPolicy {
     }
 }
 
-impl From<ActivationPolicy> for NSApplicationActivationPolicy {
-    fn from(activation_policy: ActivationPolicy) -> Self {
-        match activation_policy {
-            ActivationPolicy::Regular =>
-                NSApplicationActivationPolicy::NSApplicationActivationPolicyRegular,
-            ActivationPolicy::Accessory =>
-                NSApplicationActivationPolicy::NSApplicationActivationPolicyAccessory,
-            ActivationPolicy::Prohibited =>
-                NSApplicationActivationPolicy::NSApplicationActivationPolicyProhibited,
-        }
-    }
-}
-
 /// Additional methods on `WindowBuilder` that are specific to MacOS.
 ///
 /// **Note:** Properties dealing with the titlebar will be overwritten by the `with_decorations` method

src/os/unix.rs

@@ -1,9 +1,11 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 
 use std::os::raw;
 use std::ptr;
 use std::sync::Arc;
 
+use sctk::window::{ButtonState, Theme};
+
 use {
     EventsLoop,
     LogicalSize,
@@ -25,6 +27,74 @@ pub use platform::x11;
 pub use platform::XNotSupported;
 pub use platform::x11::util::WindowType as XWindowType;
 
+/// Theme for wayland client side decorations
+///
+/// Colors must be in ARGB8888 format
+pub struct WaylandTheme {
+    /// Primary color when the window is focused
+    pub primary_active: [u8; 4],
+    /// Primary color when the window is unfocused
+    pub primary_inactive: [u8; 4],
+    /// Secondary color when the window is focused
+    pub secondary_active: [u8; 4],
+    /// Secondary color when the window is unfocused
+    pub secondary_inactive: [u8; 4],
+    /// Close button color when hovered over
+    pub close_button_hovered: [u8; 4],
+    /// Close button color
+    pub close_button: [u8; 4],
+    /// Close button color when hovered over
+    pub maximize_button_hovered: [u8; 4],
+    /// Maximize button color
+    pub maximize_button: [u8; 4],
+    /// Minimize button color when hovered over
+    pub minimize_button_hovered: [u8; 4],
+    /// Minimize button color
+    pub minimize_button: [u8; 4],
+}
+
+struct WaylandThemeObject(WaylandTheme);
+
+impl Theme for WaylandThemeObject {
+    fn get_primary_color(&self, active: bool) -> [u8; 4] {
+        if active {
+            self.0.primary_active
+        } else {
+            self.0.primary_inactive
+        }
+    }
+
+    // Used for division line
+    fn get_secondary_color(&self, active: bool) -> [u8; 4] {
+        if active {
+            self.0.secondary_active
+        } else {
+            self.0.secondary_inactive
+        }
+    }
+
+    fn get_close_button_color(&self, state: ButtonState) -> [u8; 4] {
+        match state {
+            ButtonState::Hovered => self.0.close_button_hovered,
+            _ => self.0.close_button,
+        }
+    }
+
+    fn get_maximize_button_color(&self, state: ButtonState) -> [u8; 4] {
+        match state {
+            ButtonState::Hovered => self.0.maximize_button_hovered,
+            _ => self.0.maximize_button,
+        }
+    }
+
+    fn get_minimize_button_color(&self, state: ButtonState) -> [u8; 4] {
+        match state {
+            ButtonState::Hovered => self.0.minimize_button_hovered,
+            _ => self.0.minimize_button,
+        }
+    }
+}
+
 /// Additional methods on `EventsLoop` that are specific to Linux.
 pub trait EventsLoopExt {
     /// Builds a new `EventsLoop` that is forced to use X11.
@@ -43,6 +113,13 @@ pub trait EventsLoopExt {
 
     #[doc(hidden)]
     fn get_xlib_xconnection(&self) -> Option<Arc<XConnection>>;
+
+    /// Returns a pointer to the `wl_display` object of wayland that is used by this `EventsLoop`.
+    ///
+    /// Returns `None` if the `EventsLoop` doesn't use wayland (if it uses xlib for example).
+    ///
+    /// The pointer will become invalid when the glutin `EventsLoop` is destroyed.
+    fn get_wayland_display(&self) -> Option<*mut raw::c_void>;
 }
 
 impl EventsLoopExt for EventsLoop {
@@ -82,6 +159,14 @@ impl EventsLoopExt for EventsLoop {
     fn get_xlib_xconnection(&self) -> Option<Arc<XConnection>> {
         self.events_loop.x_connection().cloned()
     }
+
+    #[inline]
+    fn get_wayland_display(&self) -> Option<*mut raw::c_void> {
+        match self.events_loop {
+            LinuxEventsLoop::Wayland(ref e) => Some(e.get_display().c_ptr() as *mut _),
+            _ => None
+        }
+    }
 }
 
 /// Additional methods on `Window` that are specific to Unix.
@@ -127,6 +212,9 @@ pub trait WindowExt {
     /// The pointer will become invalid when the glutin `Window` is destroyed.
     fn get_wayland_display(&self) -> Option<*mut raw::c_void>;
 
+    /// Sets the color theme of the client side window decorations on wayland
+    fn set_wayland_theme(&self, theme: WaylandTheme);
+
     /// Check if the window is ready for drawing
     ///
     /// It is a remnant of a previous implementation detail for the
@@ -202,6 +290,14 @@ impl WindowExt for Window {
         }
     }
 
+    #[inline]
+    fn set_wayland_theme(&self, theme: WaylandTheme) {
+        match self.window {
+            LinuxWindow::Wayland(ref w) => w.set_theme(WaylandThemeObject(theme)),
+            _ => {}
+        }
+    }
+
     #[inline]
     fn is_ready(&self) -> bool {
         true
@@ -219,10 +315,19 @@ pub trait WindowBuilderExt {
     fn with_override_redirect(self, override_redirect: bool) -> WindowBuilder;
     /// Build window with `_NET_WM_WINDOW_TYPE` hint; defaults to `Normal`. Only relevant on X11.
     fn with_x11_window_type(self, x11_window_type: XWindowType) -> WindowBuilder;
+    /// Build window with `_GTK_THEME_VARIANT` hint set to the specified value. Currently only relevant on X11.
+    fn with_gtk_theme_variant(self, variant: String) -> WindowBuilder;
     /// Build window with resize increment hint. Only implemented on X11.
     fn with_resize_increments(self, increments: LogicalSize) -> WindowBuilder;
     /// Build window with base size hint. Only implemented on X11.
     fn with_base_size(self, base_size: LogicalSize) -> WindowBuilder;
+
+    /// Build window with a given application ID. It should match the `.desktop` file distributed with
+    /// your program. Only relevant on Wayland.
+    ///
+    /// For details about application ID conventions, see the
+    /// [Desktop Entry Spec](https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#desktop-file-id)
+    fn with_app_id(self, app_id: String) -> WindowBuilder;
 }
 
 impl WindowBuilderExt for WindowBuilder {
@@ -269,6 +374,18 @@ impl WindowBuilderExt for WindowBuilder {
         self.platform_specific.base_size = Some(base_size.into());
         self
     }
+
+    #[inline]
+    fn with_gtk_theme_variant(mut self, variant: String) -> WindowBuilder {
+        self.platform_specific.gtk_theme_variant = Some(variant);
+        self
+    }
+
+    #[inline]
+    fn with_app_id(mut self, app_id: String) -> WindowBuilder {
+        self.platform_specific.app_id = Some(app_id);
+        self
+    }
 }
 
 /// Additional methods on `MonitorId` that are specific to Linux.

src/platform/android/mod.rs

@@ -170,9 +170,21 @@ impl EventsLoopProxy {
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct WindowId;
 
+impl WindowId {
+    pub unsafe fn dummy() -> Self {
+        WindowId
+    }
+}
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId;
 
+impl DeviceId {
+    pub unsafe fn dummy() -> Self {
+        DeviceId
+    }
+}
+
 pub struct Window {
     native_window: *const c_void,
 }
@@ -356,6 +368,13 @@ impl Window {
         // Android has single screen maximized apps so nothing to do
     }
 
+    #[inline]
+    pub fn get_fullscreen(&self) -> Option<RootMonitorId> {
+        // N/A
+        // Android has single screen maximized apps so nothing to do
+        None
+    }
+
     #[inline]
     pub fn set_fullscreen(&self, _monitor: Option<RootMonitorId>) {
         // N/A

src/platform/emscripten/mod.rs

@@ -27,6 +27,12 @@ unsafe impl Sync for PlatformSpecificWindowBuilderAttributes {}
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId;
 
+impl DeviceId {
+    pub unsafe fn dummy() -> Self {
+        DeviceId
+    }
+}
+
 #[derive(Clone, Default)]
 pub struct PlatformSpecificHeadlessBuilderAttributes;
 
@@ -149,6 +155,12 @@ impl EventsLoop {
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct WindowId(usize);
 
+impl WindowId {
+    pub unsafe fn dummy() -> Self {
+        WindowId(0)
+    }
+}
+
 pub struct Window2 {
     cursor_grabbed: Mutex<bool>,
     cursor_hidden: Mutex<bool>,
@@ -568,6 +580,11 @@ impl Window {
         // iOS has single screen maximized apps so nothing to do
     }
 
+    #[inline]
+    pub fn get_fullscreen(&self) -> Option<::MonitorId> {
+        None
+    }
+
     #[inline]
     pub fn set_fullscreen(&self, _monitor: Option<::MonitorId>) {
         // iOS has single screen maximized apps so nothing to do
@@ -810,11 +827,15 @@ fn key_translate_virt(input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES
         "F13" => Some(F13),
         "F14" => Some(F14),
         "F15" => Some(F15),
-        "F16" => None,
-        "F17" => None,
-        "F18" => None,
-        "F19" => None,
-        "F20" => None,
+        "F16" => Some(F16),
+        "F17" => Some(F17),
+        "F18" => Some(F18),
+        "F19" => Some(F19),
+        "F20" => Some(F20),
+        "F21" => Some(F21),
+        "F22" => Some(F22),
+        "F23" => Some(F23),
+        "F24" => Some(F24),
         "Soft1" => None,
         "Soft2" => None,
         "Soft3" => None,

src/platform/ios/ffi.rs

@@ -1,10 +1,9 @@
 #![allow(non_camel_case_types, non_snake_case, non_upper_case_globals)]
 
 use std::ffi::CString;
-use std::mem;
 use std::os::raw::*;
 
-use objc::runtime::{Class, Object};
+use objc::runtime::Object;
 
 pub type id = *mut Object;
 pub const nil: id = 0 as id;
@@ -15,19 +14,11 @@ pub type Boolean = u32;
 
 pub const kCFRunLoopRunHandledSource: i32 = 4;
 
-pub const UIViewAutoresizingFlexibleWidth: NSUInteger = 1 << 1;
-pub const UIViewAutoresizingFlexibleHeight: NSUInteger = 1 << 4;
-
 #[cfg(target_pointer_width = "32")]
 pub type CGFloat = f32;
 #[cfg(target_pointer_width = "64")]
 pub type CGFloat = f64;
 
-#[cfg(target_pointer_width = "32")]
-pub type NSUInteger = u32;
-#[cfg(target_pointer_width = "64")]
-pub type NSUInteger = u64;
-
 #[repr(C)]
 #[derive(Debug, Clone)]
 pub struct CGPoint {
@@ -73,12 +64,24 @@ extern {
 
 extern {
     pub fn setjmp(env: *mut c_void) -> c_int;
-    pub fn longjmp(env: *mut c_void, val: c_int);
+    pub fn longjmp(env: *mut c_void, val: c_int) -> !;
 }
 
+// values taken from "setjmp.h" header in xcode iPhoneOS/iPhoneSimulator SDK
+#[cfg(any(target_arch = "x86_64"))]
+pub const JBLEN: usize = (9 * 2) + 3 + 16;
+#[cfg(any(target_arch = "x86"))]
+pub const JBLEN: usize = 18;
+#[cfg(target_arch = "arm")]
+pub const JBLEN: usize = 10 + 16 + 2;
+#[cfg(target_arch = "aarch64")]
+pub const JBLEN: usize = (14 + 8 + 2) * 2;
+
+pub type JmpBuf = [c_int; JBLEN];
+
 pub trait NSString: Sized {
     unsafe fn alloc(_: Self) -> id {
-        msg_send![class("NSString"), alloc]
+        msg_send![class!(NSString), alloc]
     }
 
     unsafe fn initWithUTF8String_(self, c_string: *const c_char) -> id;
@@ -105,10 +108,3 @@ impl NSString for id {
         msg_send![self, UTF8String]
     }
 }
-
-#[inline]
-pub fn class(name: &str) -> *mut Class {
-    unsafe {
-        mem::transmute(Class::get(name))
-    }
-}

src/platform/ios/mod.rs

@@ -60,9 +60,12 @@
 
 #![cfg(target_os = "ios")]
 
+use raw_window_handle::{ios::IOSHandle, RawWindowHandle};
 use std::{fmt, mem, ptr};
+use std::cell::RefCell;
 use std::collections::VecDeque;
 use std::os::raw::*;
+use std::sync::Arc;
 
 use objc::declare::ClassDecl;
 use objc::runtime::{BOOL, Class, Object, Sel, YES};
@@ -90,6 +93,8 @@ use self::ffi::{
     CGPoint,
     CGRect,
     id,
+    JBLEN,
+    JmpBuf,
     kCFRunLoopDefaultMode,
     kCFRunLoopRunHandledSource,
     longjmp,
@@ -97,14 +102,13 @@ use self::ffi::{
     NSString,
     setjmp,
     UIApplicationMain,
-    UIViewAutoresizingFlexibleWidth,
-    UIViewAutoresizingFlexibleHeight,
  };
 
-static mut JMPBUF: [c_int; 27] = [0; 27];
+static mut JMPBUF: Option<Box<JmpBuf>> = None;
 
 pub struct Window {
-    delegate_state: *mut DelegateState,
+    _events_queue: Arc<RefCell<VecDeque<Event>>>,
+    delegate_state: Box<DelegateState>,
 }
 
 unsafe impl Send for Window {}
@@ -112,7 +116,6 @@ unsafe impl Sync for Window {}
 
 #[derive(Debug)]
 struct DelegateState {
-    events_queue: VecDeque<Event>,
     window: id,
     controller: id,
     view: id,
@@ -123,7 +126,6 @@ struct DelegateState {
 impl DelegateState {
     fn new(window: id, controller: id, view: id, size: LogicalSize, scale: f64) -> DelegateState {
         DelegateState {
-            events_queue: VecDeque::new(),
             window,
             controller,
             view,
@@ -170,7 +172,7 @@ impl fmt::Debug for MonitorId {
 impl MonitorId {
     #[inline]
     pub fn get_uiscreen(&self) -> id {
-        let class = Class::get("UIScreen").expect("Failed to get class `UIScreen`");
+        let class = class!(UIScreen);
         unsafe { msg_send![class, mainScreen] }
     }
 
@@ -199,7 +201,7 @@ impl MonitorId {
 }
 
 pub struct EventsLoop {
-    delegate_state: *mut DelegateState,
+    events_queue: Arc<RefCell<VecDeque<Event>>>,
 }
 
 #[derive(Clone)]
@@ -208,21 +210,11 @@ pub struct EventsLoopProxy;
 impl EventsLoop {
     pub fn new() -> EventsLoop {
         unsafe {
-            if setjmp(mem::transmute(&mut JMPBUF)) != 0 {
-                let app_class = Class::get("UIApplication").expect("Failed to get class `UIApplication`");
-                let app: id = msg_send![app_class, sharedApplication];
-                let delegate: id = msg_send![app, delegate];
-                let state: *mut c_void = *(&*delegate).get_ivar("winitState");
-                let delegate_state = state as *mut DelegateState;
-                return EventsLoop { delegate_state };
+            if !msg_send![class!(NSThread), isMainThread] {
+                panic!("`EventsLoop` can only be created on the main thread on iOS");
             }
         }
-
-        create_view_class();
-        create_delegate_class();
-        start_app();
-
-        panic!("Couldn't create `UIApplication`!")
+        EventsLoop { events_queue: Default::default() }
     }
 
     #[inline]
@@ -240,29 +232,30 @@ impl EventsLoop {
     pub fn poll_events<F>(&mut self, mut callback: F)
         where F: FnMut(::Event)
     {
+        if let Some(event) = self.events_queue.borrow_mut().pop_front() {
+            callback(event);
+            return;
+        }
+
         unsafe {
-            let state = &mut *self.delegate_state;
-
-            if let Some(event) = state.events_queue.pop_front() {
-                callback(event);
-                return;
-            }
-
             // jump hack, so we won't quit on willTerminate event before processing it
-            if setjmp(mem::transmute(&mut JMPBUF)) != 0 {
-                if let Some(event) = state.events_queue.pop_front() {
+            assert!(JMPBUF.is_some(), "`EventsLoop::poll_events` must be called after window creation on iOS");
+            if setjmp(mem::transmute_copy(&mut JMPBUF)) != 0 {
+                if let Some(event) = self.events_queue.borrow_mut().pop_front() {
                     callback(event);
                     return;
                 }
             }
+        }
 
+        unsafe {
             // run runloop
             let seconds: CFTimeInterval = 0.000002;
             while CFRunLoopRunInMode(kCFRunLoopDefaultMode, seconds, 1) == kCFRunLoopRunHandledSource {}
+        }
 
-            if let Some(event) = state.events_queue.pop_front() {
-                callback(event)
-            }
+        if let Some(event) = self.events_queue.borrow_mut().pop_front() {
+            callback(event)
         }
     }
 
@@ -298,11 +291,33 @@ impl EventsLoopProxy {
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct WindowId;
 
+impl WindowId {
+    pub unsafe fn dummy() -> Self {
+        WindowId
+    }
+}
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId;
 
-#[derive(Clone, Default)]
-pub struct PlatformSpecificWindowBuilderAttributes;
+impl DeviceId {
+    pub unsafe fn dummy() -> Self {
+        DeviceId
+    }
+}
+
+#[derive(Clone)]
+pub struct PlatformSpecificWindowBuilderAttributes {
+    pub root_view_class: &'static Class,
+}
+
+impl Default for PlatformSpecificWindowBuilderAttributes {
+    fn default() -> Self {
+        PlatformSpecificWindowBuilderAttributes {
+            root_view_class: class!(UIView),
+        }
+    }
+}
 
 // TODO: AFAIK transparency is enabled by default on iOS,
 // so to be consistent with other platforms we have to change that.
@@ -310,19 +325,60 @@ impl Window {
     pub fn new(
         ev: &EventsLoop,
         _attributes: WindowAttributes,
-        _pl_alltributes: PlatformSpecificWindowBuilderAttributes,
+        pl_attributes: PlatformSpecificWindowBuilderAttributes,
     ) -> Result<Window, CreationError> {
-        Ok(Window { delegate_state: ev.delegate_state })
+        unsafe {
+            debug_assert!(mem::size_of_val(&JMPBUF) == mem::size_of::<Box<JmpBuf>>());
+            assert!(mem::replace(&mut JMPBUF, Some(Box::new([0; JBLEN]))).is_none(), "Only one `Window` is supported on iOS");
+        }
+
+        unsafe {
+            if setjmp(mem::transmute_copy(&mut JMPBUF)) != 0 {
+                let app_class = class!(UIApplication);
+                let app: id = msg_send![app_class, sharedApplication];
+                let delegate: id = msg_send![app, delegate];
+                let state: *mut c_void = *(&*delegate).get_ivar("winitState");
+                let mut delegate_state = Box::from_raw(state as *mut DelegateState);
+                let events_queue = &*ev.events_queue;
+                (&mut *delegate).set_ivar("eventsQueue", mem::transmute::<_, *mut c_void>(events_queue));
+
+                // easiest? way to get access to PlatformSpecificWindowBuilderAttributes to configure the view
+                let rect: CGRect = msg_send![MonitorId.get_uiscreen(), bounds];
+
+                let uiview_class = class!(UIView);
+                let root_view_class = pl_attributes.root_view_class;
+                let is_uiview: BOOL = msg_send![root_view_class, isSubclassOfClass:uiview_class];
+                assert!(is_uiview == YES, "`root_view_class` must inherit from `UIView`");
+
+                delegate_state.view = msg_send![root_view_class, alloc];
+                assert!(!delegate_state.view.is_null(), "Failed to create `UIView` instance");
+                delegate_state.view = msg_send![delegate_state.view, initWithFrame:rect];
+                assert!(!delegate_state.view.is_null(), "Failed to initialize `UIView` instance");
+
+                let _: () = msg_send![delegate_state.controller, setView:delegate_state.view];
+                let _: () = msg_send![delegate_state.window, makeKeyAndVisible];
+
+                return Ok(Window {
+                    _events_queue: ev.events_queue.clone(),
+                    delegate_state,
+                });
+            }
+        }
+
+        create_delegate_class();
+        start_app();
+
+        panic!("Couldn't create `UIApplication`!")
     }
 
     #[inline]
     pub fn get_uiwindow(&self) -> id {
-        unsafe { (*self.delegate_state).window }
+        self.delegate_state.window
     }
 
     #[inline]
     pub fn get_uiview(&self) -> id {
-        unsafe { (*self.delegate_state).view }
+        self.delegate_state.view
     }
 
     #[inline]
@@ -359,7 +415,7 @@ impl Window {
 
     #[inline]
     pub fn get_inner_size(&self) -> Option<LogicalSize> {
-        unsafe { Some((&*self.delegate_state).size) }
+        Some(self.delegate_state.size)
     }
 
     #[inline]
@@ -404,7 +460,7 @@ impl Window {
 
     #[inline]
     pub fn get_hidpi_factor(&self) -> f64 {
-        unsafe { (&*self.delegate_state) }.scale
+        self.delegate_state.scale
     }
 
     #[inline]
@@ -418,6 +474,13 @@ impl Window {
         // iOS has single screen maximized apps so nothing to do
     }
 
+    #[inline]
+    pub fn get_fullscreen(&self) -> Option<RootMonitorId> {
+        // N/A
+        // iOS has single screen maximized apps so nothing to do
+        None
+    }
+
     #[inline]
     pub fn set_fullscreen(&self, _monitor: Option<RootMonitorId>) {
         // N/A
@@ -465,14 +528,22 @@ impl Window {
     pub fn id(&self) -> WindowId {
         WindowId
     }
+
+    pub fn raw_window_handle(&self) -> RawWindowHandle {
+        let handle = IOSHandle {
+            ui_window: self.get_uiwindow() as *mut _,
+            ui_view: self.get_uiview() as *mut _,
+            ..IOSHandle::empty()
+        };
+        RawWindowHandle::IOS(handle)
+    }
 }
 
 fn create_delegate_class() {
     extern fn did_finish_launching(this: &mut Object, _: Sel, _: id, _: id) -> BOOL {
-        let screen_class = Class::get("UIScreen").expect("Failed to get class `UIScreen`");
-        let window_class = Class::get("UIWindow").expect("Failed to get class `UIWindow`");
-        let controller_class = Class::get("MainViewController").expect("Failed to get class `MainViewController`");
-        let view_class = Class::get("MainView").expect("Failed to get class `MainView`");
+        let screen_class = class!(UIScreen);
+        let window_class = class!(UIWindow);
+        let controller_class = class!(UIViewController);
         unsafe {
             let main_screen: id = msg_send![screen_class, mainScreen];
             let bounds: CGRect = msg_send![main_screen, bounds];
@@ -486,30 +557,28 @@ fn create_delegate_class() {
             let view_controller: id = msg_send![controller_class, alloc];
             let view_controller: id = msg_send![view_controller, init];
 
-            let view: id = msg_send![view_class, alloc];
-            let view: id = msg_send![view, initForGl:&bounds];
-
             let _: () = msg_send![window, setRootViewController:view_controller];
-            let _: () = msg_send![window, makeKeyAndVisible];
 
-            let state = Box::new(DelegateState::new(window, view_controller, view, size, scale as f64));
+            let state = Box::new(DelegateState::new(window, view_controller, ptr::null_mut(), size, scale as f64));
             let state_ptr: *mut DelegateState = mem::transmute(state);
             this.set_ivar("winitState", state_ptr as *mut c_void);
 
+            // The `UIView` is setup in `Window::new` which gets `longjmp`'ed to here.
+            // This makes it easier to configure the specific `UIView` type.
             let _: () = msg_send![this, performSelector:sel!(postLaunch:) withObject:nil afterDelay:0.0];
         }
         YES
     }
 
     extern fn post_launch(_: &Object, _: Sel, _: id) {
-        unsafe { longjmp(mem::transmute(&mut JMPBUF),1); }
+        unsafe { longjmp(mem::transmute_copy(&mut JMPBUF), 1); }
     }
 
     extern fn did_become_active(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
-            state.events_queue.push_back(Event::WindowEvent {
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
+            events_queue.borrow_mut().push_back(Event::WindowEvent {
                 window_id: RootEventId(WindowId),
                 event: WindowEvent::Focused(true),
             });
@@ -518,9 +587,9 @@ fn create_delegate_class() {
 
     extern fn will_resign_active(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
-            state.events_queue.push_back(Event::WindowEvent {
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
+            events_queue.borrow_mut().push_back(Event::WindowEvent {
                 window_id: RootEventId(WindowId),
                 event: WindowEvent::Focused(false),
             });
@@ -529,38 +598,38 @@ fn create_delegate_class() {
 
     extern fn will_enter_foreground(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
-            state.events_queue.push_back(Event::Suspended(false));
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
+            events_queue.borrow_mut().push_back(Event::Suspended(false));
         }
     }
 
     extern fn did_enter_background(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
-            state.events_queue.push_back(Event::Suspended(true));
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
+            events_queue.borrow_mut().push_back(Event::Suspended(true));
         }
     }
 
     extern fn will_terminate(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
             // push event to the front to garantee that we'll process it
             // immidiatly after jump
-            state.events_queue.push_front(Event::WindowEvent {
+            events_queue.borrow_mut().push_front(Event::WindowEvent {
                 window_id: RootEventId(WindowId),
                 event: WindowEvent::Destroyed,
             });
-            longjmp(mem::transmute(&mut JMPBUF),1);
+            longjmp(mem::transmute_copy(&mut JMPBUF), 1);
         }
     }
 
     extern fn handle_touches(this: &Object, _: Sel, touches: id, _:id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
 
             let touches_enum: id = msg_send![touches, objectEnumerator];
 
@@ -573,7 +642,7 @@ fn create_delegate_class() {
                 let touch_id = touch as u64;
                 let phase: i32 = msg_send![touch, phase];
 
-                state.events_queue.push_back(Event::WindowEvent {
+                events_queue.borrow_mut().push_back(Event::WindowEvent {
                     window_id: RootEventId(WindowId),
                     event: WindowEvent::Touch(Touch {
                         device_id: DEVICE_ID,
@@ -593,7 +662,7 @@ fn create_delegate_class() {
         }
     }
 
-    let ui_responder = Class::get("UIResponder").expect("Failed to get class `UIResponder`");
+    let ui_responder = class!(UIResponder);
     let mut decl = ClassDecl::new("AppDelegate", ui_responder).expect("Failed to declare class `AppDelegate`");
 
     unsafe {
@@ -633,46 +702,12 @@ fn create_delegate_class() {
                         post_launch as extern fn(&Object, Sel, id));
 
         decl.add_ivar::<*mut c_void>("winitState");
+        decl.add_ivar::<*mut c_void>("eventsQueue");
 
         decl.register();
     }
 }
 
-// TODO: winit shouldn't contain GL-specfiic code
-pub fn create_view_class() {
-    let superclass = Class::get("UIViewController").expect("Failed to get class `UIViewController`");
-    let decl = ClassDecl::new("MainViewController", superclass).expect("Failed to declare class `MainViewController`");
-    decl.register();
-
-    extern fn init_for_gl(this: &Object, _: Sel, frame: *const c_void) -> id {
-        unsafe {
-            let bounds = frame as *const CGRect;
-            let view: id = msg_send![this, initWithFrame:(*bounds).clone()];
-
-            let mask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
-            let _: () = msg_send![view, setAutoresizingMask:mask];
-            let _: () = msg_send![view, setAutoresizesSubviews:YES];
-
-            let layer: id = msg_send![view, layer];
-            let _ : () = msg_send![layer, setOpaque:YES];
-
-            view
-        }
-    }
-
-    extern fn layer_class(_: &Class, _: Sel) -> *const Class {
-        unsafe { mem::transmute(Class::get("CAEAGLLayer").expect("Failed to get class `CAEAGLLayer`")) }
-    }
-
-    let superclass = Class::get("GLKView").expect("Failed to get class `GLKView`");
-    let mut decl = ClassDecl::new("MainView", superclass).expect("Failed to declare class `MainView`");
-    unsafe {
-        decl.add_method(sel!(initForGl:), init_for_gl as extern fn(&Object, Sel, *const c_void) -> id);
-        decl.add_class_method(sel!(layerClass), layer_class as extern fn(&Class, Sel) -> *const Class);
-        decl.register();
-    }
-}
-
 #[inline]
 fn start_app() {
     unsafe {

src/platform/linux/dlopen.rs

@@ -1,4 +1,4 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 #![allow(dead_code)]
 
 use std::os::raw::{c_void, c_char, c_int};
@@ -6,7 +6,7 @@ use std::os::raw::{c_void, c_char, c_int};
 pub const RTLD_LAZY: c_int = 0x001;
 pub const RTLD_NOW: c_int = 0x002;
 
-#[link="dl"]
+#[link(name = "dl")]
 extern {
     pub fn dlopen(filename: *const c_char, flag: c_int) -> *mut c_void;
     pub fn dlerror() -> *mut c_char;

src/platform/linux/mod.rs

@@ -1,4 +1,4 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 
 use std::collections::VecDeque;
 use std::{env, mem};
@@ -7,6 +7,7 @@ use std::os::raw::*;
 use std::sync::Arc;
 
 use parking_lot::Mutex;
+use raw_window_handle::RawWindowHandle;
 use sctk::reexports::client::ConnectError;
 
 use {
@@ -45,6 +46,8 @@ pub struct PlatformSpecificWindowBuilderAttributes {
     pub class: Option<(String, String)>,
     pub override_redirect: bool,
     pub x11_window_type: x11::util::WindowType,
+    pub gtk_theme_variant: Option<String>,
+    pub app_id: Option<String>
 }
 
 lazy_static!(
@@ -64,12 +67,24 @@ pub enum WindowId {
     Wayland(wayland::WindowId),
 }
 
+impl WindowId {
+    pub unsafe fn dummy() -> Self {
+        WindowId::X(x11::WindowId::dummy())
+    }
+}
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum DeviceId {
     X(x11::DeviceId),
     Wayland(wayland::DeviceId),
 }
 
+impl DeviceId {
+    pub unsafe fn dummy() -> Self {
+        DeviceId::X(x11::DeviceId::dummy())
+    }
+}
+
 #[derive(Debug, Clone)]
 pub enum MonitorId {
     X(x11::MonitorId),
@@ -127,7 +142,7 @@ impl Window {
     ) -> Result<Self, CreationError> {
         match *events_loop {
             EventsLoop::Wayland(ref events_loop) => {
-                wayland::Window::new(events_loop, attribs).map(Window::Wayland)
+                wayland::Window::new(events_loop, attribs, pl_attribs).map(Window::Wayland)
             },
             EventsLoop::X(ref events_loop) => {
                 x11::Window::new(events_loop, attribs, pl_attribs).map(Window::X)
@@ -287,6 +302,15 @@ impl Window {
         }
     }
 
+    #[inline]
+    pub fn get_fullscreen(&self) -> Option<RootMonitorId> {
+        match self {
+            &Window::X(ref w) => w.get_fullscreen(),
+            &Window::Wayland(ref w) => w.get_fullscreen()
+                .map(|monitor_id| RootMonitorId { inner: MonitorId::Wayland(monitor_id) })
+        }
+    }
+
     #[inline]
     pub fn set_fullscreen(&self, monitor: Option<RootMonitorId>) {
         match self {
@@ -356,6 +380,13 @@ impl Window {
             &Window::Wayland(ref window) => MonitorId::Wayland(window.get_primary_monitor()),
         }
     }
+
+    pub fn raw_window_handle(&self) -> RawWindowHandle {
+        match self {
+            &Window::X(ref window) => RawWindowHandle::Xlib(window.raw_window_handle()),
+            &Window::Wayland(ref window) => RawWindowHandle::Wayland(window.raw_window_handle()),
+        }
+    }
 }
 
 unsafe extern "C" fn x_error_callback(
@@ -380,7 +411,7 @@ unsafe extern "C" fn x_error_callback(
             minor_code: (*event).minor_code,
         };
 
-        eprintln!("[winit X11 error] {:#?}", error);
+        error!("X11 error: {:#?}", error);
 
         *xconn.latest_error.lock() = Some(error);
     }
@@ -429,10 +460,7 @@ impl EventsLoop {
         };
 
         let err_string = format!(
-r#"Failed to initialize any backend!
-    Wayland status: {:#?}
-    X11 status: {:#?}
-"#,
+            "Failed to initialize any backend! Wayland status: {:?} X11 status: {:?}",
             wayland_err,
             x11_err,
         );

src/platform/linux/wayland/event_loop.rs

@@ -1,22 +1,25 @@
 use std::cell::RefCell;
 use std::collections::VecDeque;
 use std::fmt;
-use std::sync::{Arc, Mutex, Weak};
 use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::{Arc, Mutex, Weak};
 
 use {ControlFlow, EventsLoopClosed, PhysicalPosition, PhysicalSize};
 
-use super::WindowId;
 use super::window::WindowStore;
+use super::WindowId;
 
-use sctk::Environment;
 use sctk::output::OutputMgr;
-use sctk::reexports::client::{Display, EventQueue, GlobalEvent, Proxy, ConnectError};
-use sctk::reexports::client::commons::Implementation;
-use sctk::reexports::client::protocol::{wl_keyboard, wl_output, wl_pointer, wl_registry, wl_seat,
-                                        wl_touch};
+use sctk::reexports::client::protocol::{
+    wl_keyboard, wl_output, wl_pointer, wl_registry, wl_seat, wl_touch,
+};
+use sctk::reexports::client::{ConnectError, Display, EventQueue, GlobalEvent, Proxy};
+use sctk::Environment;
 
 use sctk::reexports::client::protocol::wl_display::RequestsTrait as DisplayRequests;
+use sctk::reexports::client::protocol::wl_surface::RequestsTrait;
+
+use ModifiersState;
 
 pub struct EventsLoopSink {
     buffer: VecDeque<::Event>,
@@ -91,7 +94,7 @@ impl EventsLoopProxy {
                 // Update the `EventsLoop`'s `pending_wakeup` flag.
                 wakeup.store(true, Ordering::Relaxed);
                 // Cause the `EventsLoop` to break from `dispatch` if it is currently blocked.
-                let _ = display.sync();
+                let _ = display.sync(|callback| callback.implement(|_, _| {}, ()));
                 display.flush().map_err(|_| EventsLoopClosed)?;
                 Ok(())
             }
@@ -104,29 +107,50 @@ impl EventsLoop {
     pub fn new() -> Result<EventsLoop, ConnectError> {
         let (display, mut event_queue) = Display::connect_to_env()?;
 
+        let display = Arc::new(display);
+        let pending_wakeup = Arc::new(AtomicBool::new(false));
         let sink = Arc::new(Mutex::new(EventsLoopSink::new()));
         let store = Arc::new(Mutex::new(WindowStore::new()));
         let seats = Arc::new(Mutex::new(Vec::new()));
 
-        let env = Environment::from_registry_with_cb(
-            display.get_registry().unwrap(),
+        let mut seat_manager = SeatManager {
+            sink: sink.clone(),
+            store: store.clone(),
+            seats: seats.clone(),
+            events_loop_proxy: EventsLoopProxy {
+                display: Arc::downgrade(&display),
+                pending_wakeup: Arc::downgrade(&pending_wakeup),
+            },
+        };
+
+        let env = Environment::from_display_with_cb(
+            &display,
             &mut event_queue,
-            SeatManager {
-                sink: sink.clone(),
-                store: store.clone(),
-                seats: seats.clone(),
+            move |event, registry| {
+                match event {
+                    GlobalEvent::New { id, ref interface, version } => {
+                        if interface == "wl_seat" {
+                            seat_manager.add_seat(id, version, registry)
+                        }
+                    },
+                    GlobalEvent::Removed { id, ref interface } => {
+                        if interface == "wl_seat" {
+                            seat_manager.remove_seat(id)
+                        }
+                    },
+                }
             },
         ).unwrap();
 
         Ok(EventsLoop {
-            display: Arc::new(display),
+            display,
             evq: RefCell::new(event_queue),
-            sink: sink,
-            pending_wakeup: Arc::new(AtomicBool::new(false)),
-            store: store,
-            env: env,
+            sink,
+            pending_wakeup,
+            store,
+            env,
             cleanup_needed: Arc::new(Mutex::new(false)),
-            seats: seats,
+            seats,
         })
     }
 
@@ -205,6 +229,10 @@ impl EventsLoop {
     pub fn get_available_monitors(&self) -> VecDeque<MonitorId> {
         get_available_monitors(&self.env.outputs)
     }
+
+    pub fn get_display(&self) -> &Display {
+        &*self.display
+    }
 }
 
 /*
@@ -242,6 +270,9 @@ impl EventsLoop {
                         *size = (w, h);
                     } else if frame_refresh {
                         frame.refresh();
+                        if !refresh {
+                            frame.surface().commit()
+                        }
                     }
                 }
                 if let Some(dpi) = new_dpi {
@@ -266,43 +297,42 @@ struct SeatManager {
     sink: Arc<Mutex<EventsLoopSink>>,
     store: Arc<Mutex<WindowStore>>,
     seats: Arc<Mutex<Vec<(u32, Proxy<wl_seat::WlSeat>)>>>,
+    events_loop_proxy: EventsLoopProxy,
 }
 
-impl Implementation<Proxy<wl_registry::WlRegistry>, GlobalEvent> for SeatManager {
-    fn receive(&mut self, evt: GlobalEvent, registry: Proxy<wl_registry::WlRegistry>) {
+impl SeatManager {
+    fn add_seat(&mut self, id: u32, version: u32, registry: Proxy<wl_registry::WlRegistry>) {
         use self::wl_registry::RequestsTrait as RegistryRequests;
+        use std::cmp::min;
+
+        let mut seat_data = SeatData {
+            sink: self.sink.clone(),
+            store: self.store.clone(),
+            pointer: None,
+            keyboard: None,
+            touch: None,
+            events_loop_proxy: self.events_loop_proxy.clone(),
+            modifiers_tracker: Arc::new(Mutex::new(ModifiersState::default())),
+        };
+        let seat = registry
+            .bind(min(version, 5), id, move |seat| {
+                seat.implement(move |event, seat| {
+                    seat_data.receive(event, seat)
+                }, ())
+            })
+            .unwrap();
+        self.store.lock().unwrap().new_seat(&seat);
+        self.seats.lock().unwrap().push((id, seat));
+    }
+
+    fn remove_seat(&mut self, id: u32) {
         use self::wl_seat::RequestsTrait as SeatRequests;
-        match evt {
-            GlobalEvent::New {
-                id,
-                ref interface,
-                version,
-            } if interface == "wl_seat" =>
-            {
-                use std::cmp::min;
-                let seat = registry
-                    .bind::<wl_seat::WlSeat>(min(version, 5), id)
-                    .unwrap()
-                    .implement(SeatData {
-                        sink: self.sink.clone(),
-                        store: self.store.clone(),
-                        pointer: None,
-                        keyboard: None,
-                        touch: None,
-                    });
-                self.store.lock().unwrap().new_seat(&seat);
-                self.seats.lock().unwrap().push((id, seat));
+        let mut seats = self.seats.lock().unwrap();
+        if let Some(idx) = seats.iter().position(|&(i, _)| i == id) {
+            let (_, seat) = seats.swap_remove(idx);
+            if seat.version() >= 5 {
+                seat.release();
             }
-            GlobalEvent::Removed { id, ref interface } if interface == "wl_seat" => {
-                let mut seats = self.seats.lock().unwrap();
-                if let Some(idx) = seats.iter().position(|&(i, _)| i == id) {
-                    let (_, seat) = seats.swap_remove(idx);
-                    if seat.version() >= 5 {
-                        seat.release();
-                    }
-                }
-            }
-            _ => (),
         }
     }
 }
@@ -313,20 +343,22 @@ struct SeatData {
     pointer: Option<Proxy<wl_pointer::WlPointer>>,
     keyboard: Option<Proxy<wl_keyboard::WlKeyboard>>,
     touch: Option<Proxy<wl_touch::WlTouch>>,
+    events_loop_proxy: EventsLoopProxy,
+    modifiers_tracker: Arc<Mutex<ModifiersState>>,
 }
 
-impl Implementation<Proxy<wl_seat::WlSeat>, wl_seat::Event> for SeatData {
+impl SeatData {
     fn receive(&mut self, evt: wl_seat::Event, seat: Proxy<wl_seat::WlSeat>) {
-        use self::wl_seat::RequestsTrait as SeatRequests;
         match evt {
             wl_seat::Event::Name { .. } => (),
             wl_seat::Event::Capabilities { capabilities } => {
                 // create pointer if applicable
                 if capabilities.contains(wl_seat::Capability::Pointer) && self.pointer.is_none() {
                     self.pointer = Some(super::pointer::implement_pointer(
-                        seat.get_pointer().unwrap(),
+                        &seat,
                         self.sink.clone(),
                         self.store.clone(),
+                        self.modifiers_tracker.clone(),
                     ))
                 }
                 // destroy pointer if applicable
@@ -341,8 +373,10 @@ impl Implementation<Proxy<wl_seat::WlSeat>, wl_seat::Event> for SeatData {
                 // create keyboard if applicable
                 if capabilities.contains(wl_seat::Capability::Keyboard) && self.keyboard.is_none() {
                     self.keyboard = Some(super::keyboard::init_keyboard(
-                        seat.get_keyboard().unwrap(),
+                        &seat,
                         self.sink.clone(),
+                        self.events_loop_proxy.clone(),
+                        self.modifiers_tracker.clone(),
                     ))
                 }
                 // destroy keyboard if applicable
@@ -357,7 +391,7 @@ impl Implementation<Proxy<wl_seat::WlSeat>, wl_seat::Event> for SeatData {
                 // create touch if applicable
                 if capabilities.contains(wl_seat::Capability::Touch) && self.touch.is_none() {
                     self.touch = Some(super::touch::implement_touch(
-                        seat.get_touch().unwrap(),
+                        &seat,
                         self.sink.clone(),
                         self.store.clone(),
                     ))

src/platform/linux/wayland/keyboard.rs

@@ -1,81 +1,121 @@
 use std::sync::{Arc, Mutex};
 
+use super::{make_wid, DeviceId, EventsLoopProxy, EventsLoopSink};
+use sctk::keyboard::{
+    self, map_keyboard_auto_with_repeat, Event as KbEvent, KeyRepeatEvent, KeyRepeatKind,
+};
+use sctk::reexports::client::protocol::wl_keyboard;
+use sctk::reexports::client::Proxy;
+use sctk::reexports::client::protocol::wl_seat;
+use sctk::reexports::client::protocol::wl_seat::RequestsTrait as SeatRequests;
+
 use {ElementState, KeyboardInput, ModifiersState, VirtualKeyCode, WindowEvent};
 
-use super::{make_wid, DeviceId, EventsLoopSink};
-use sctk::keyboard::{self, map_keyboard_auto, Event as KbEvent};
-use sctk::reexports::client::{NewProxy, Proxy};
-use sctk::reexports::client::protocol::wl_keyboard;
-
 pub fn init_keyboard(
-    keyboard: NewProxy<wl_keyboard::WlKeyboard>,
+    seat: &Proxy<wl_seat::WlSeat>,
     sink: Arc<Mutex<EventsLoopSink>>,
+    events_loop_proxy: EventsLoopProxy,
+    modifiers_tracker: Arc<Mutex<ModifiersState>>,
 ) -> Proxy<wl_keyboard::WlKeyboard> {
-    // { variables to be captured by the closure
-    let mut target = None;
+    // { 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(keyboard, move |evt: KbEvent, _| match evt {
-        KbEvent::Enter { surface, .. } => {
-            let wid = make_wid(&surface);
-            my_sink
-                .lock()
-                .unwrap()
-                .send_event(WindowEvent::Focused(true), wid);
-            target = Some(wid);
-        }
-        KbEvent::Leave { surface, .. } => {
-            let wid = make_wid(&surface);
-            my_sink
-                .lock()
-                .unwrap()
-                .send_event(WindowEvent::Focused(false), wid);
-            target = None;
-        }
-        KbEvent::Key {
-            modifiers,
-            rawkey,
-            keysym,
-            state,
-            utf8,
-            ..
-        } => {
-            if let Some(wid) = target {
-                let state = match state {
-                    wl_keyboard::KeyState::Pressed => ElementState::Pressed,
-                    wl_keyboard::KeyState::Released => ElementState::Released,
-                };
-                let vkcode = key_to_vkey(rawkey, keysym);
-                let mut guard = my_sink.lock().unwrap();
+    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
+                    .lock()
+                    .unwrap()
+                    .send_event(WindowEvent::Focused(true), wid);
+                *target.lock().unwrap() = Some(wid);
+            }
+            KbEvent::Leave { surface, .. } => {
+                let wid = make_wid(&surface);
+                my_sink
+                    .lock()
+                    .unwrap()
+                    .send_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,
+                    };
+                    let vkcode = key_to_vkey(rawkey, keysym);
+                    let mut guard = my_sink.lock().unwrap();
+                    guard.send_event(
+                        WindowEvent::KeyboardInput {
+                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                            input: KeyboardInput {
+                                state: state,
+                                scancode: rawkey,
+                                virtual_keycode: vkcode,
+                                modifiers: modifiers_tracker.lock().unwrap().clone(),
+                            },
+                        },
+                        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() {
+                            guard.send_event(WindowEvent::ReceivedCharacter(chr), wid);
+                        }
+                    }
+                }
+            }
+            KbEvent::RepeatInfo { .. } => { /* Handled by smithay client toolkit */ }
+            KbEvent::Modifiers { modifiers: event_modifiers } => {
+                *modifiers_tracker.lock().unwrap() = event_modifiers.into()
+            }
+        },
+        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);
+                let mut guard = repeat_sink.lock().unwrap();
                 guard.send_event(
                     WindowEvent::KeyboardInput {
                         device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
                         input: KeyboardInput {
                             state: state,
-                            scancode: rawkey,
+                            scancode: repeat_event.rawkey,
                             virtual_keycode: vkcode,
-                            modifiers: modifiers.into(),
+                            modifiers: my_modifiers.lock().unwrap().clone(),
                         },
                     },
                     wid,
                 );
-                // send char event only on key press, not release
-                if let ElementState::Released = state {
-                    return;
-                }
-                if let Some(txt) = utf8 {
+                if let Some(txt) = repeat_event.utf8 {
                     for chr in txt.chars() {
                         guard.send_event(WindowEvent::ReceivedCharacter(chr), wid);
                     }
                 }
+                events_loop_proxy.wakeup().unwrap();
             }
-        }
-        KbEvent::RepeatInfo { .. } => { /* TODO: handle repeat info */ }
-    });
+        },
+    );
 
     match ret {
         Ok(keyboard) => keyboard,
-        Err((_, 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...
@@ -87,45 +127,47 @@ pub fn init_keyboard(
             let mut target = None;
             let my_sink = sink;
             // }
-            keyboard.implement(move |evt, _| match evt {
-                wl_keyboard::Event::Enter { surface, .. } => {
-                    let wid = make_wid(&surface);
-                    my_sink
-                        .lock()
-                        .unwrap()
-                        .send_event(WindowEvent::Focused(true), wid);
-                    target = Some(wid);
-                }
-                wl_keyboard::Event::Leave { surface, .. } => {
-                    let wid = make_wid(&surface);
-                    my_sink
-                        .lock()
-                        .unwrap()
-                        .send_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,
-                        };
-                        my_sink.lock().unwrap().send_event(
-                            WindowEvent::KeyboardInput {
-                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                                input: KeyboardInput {
-                                    state: state,
-                                    scancode: key,
-                                    virtual_keycode: None,
-                                    modifiers: ModifiersState::default(),
-                                },
-                            },
-                            wid,
-                        );
+            seat.get_keyboard(|keyboard| {
+                keyboard.implement(move |evt, _| match evt {
+                    wl_keyboard::Event::Enter { surface, .. } => {
+                        let wid = make_wid(&surface);
+                        my_sink
+                            .lock()
+                            .unwrap()
+                            .send_event(WindowEvent::Focused(true), wid);
+                        target = Some(wid);
                     }
-                }
-                _ => (),
-            })
+                    wl_keyboard::Event::Leave { surface, .. } => {
+                        let wid = make_wid(&surface);
+                        my_sink
+                            .lock()
+                            .unwrap()
+                            .send_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,
+                            };
+                            my_sink.lock().unwrap().send_event(
+                                WindowEvent::KeyboardInput {
+                                    device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                    input: KeyboardInput {
+                                        state: state,
+                                        scancode: key,
+                                        virtual_keycode: None,
+                                        modifiers: ModifiersState::default(),
+                                    },
+                                },
+                                wid,
+                            );
+                        }
+                    }
+                    _ => (),
+                }, ())
+            }).unwrap()
         }
     }
 }
@@ -193,6 +235,15 @@ fn keysym_to_vkey(keysym: u32) -> Option<VirtualKeyCode> {
         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),
@@ -261,6 +312,13 @@ fn keysym_to_vkey(keysym: u32) -> Option<VirtualKeyCode> {
         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),

src/platform/linux/wayland/mod.rs

@@ -1,5 +1,5 @@
 #![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd",
-           target_os = "openbsd"))]
+           target_os = "netbsd", target_os = "openbsd"))]
 
 pub use self::window::Window;
 pub use self::event_loop::{EventsLoop, EventsLoopProxy, EventsLoopSink, MonitorId};

src/platform/linux/wayland/pointer.rs

@@ -7,184 +7,183 @@ use super::DeviceId;
 use super::event_loop::EventsLoopSink;
 use super::window::WindowStore;
 
-use sctk::reexports::client::{NewProxy, Proxy};
+use sctk::reexports::client::Proxy;
 use sctk::reexports::client::protocol::wl_pointer::{self, Event as PtrEvent, WlPointer};
+use sctk::reexports::client::protocol::wl_seat;
+use sctk::reexports::client::protocol::wl_seat::RequestsTrait as SeatRequests;
 
 pub fn implement_pointer(
-    pointer: NewProxy<WlPointer>,
+    seat: &Proxy<wl_seat::WlSeat>,
     sink: Arc<Mutex<EventsLoopSink>>,
     store: Arc<Mutex<WindowStore>>,
+    modifiers_tracker: Arc<Mutex<ModifiersState>>,
 ) -> Proxy<WlPointer> {
     let mut mouse_focus = None;
     let mut axis_buffer = None;
     let mut axis_discrete_buffer = None;
     let mut axis_state = TouchPhase::Ended;
 
-    pointer.implement(move |evt, pointer: Proxy<_>| {
-        let mut sink = sink.lock().unwrap();
-        let store = store.lock().unwrap();
-        match evt {
-            PtrEvent::Enter {
-                surface,
-                surface_x,
-                surface_y,
-                ..
-            } => {
-                let wid = store.find_wid(&surface);
-                if let Some(wid) = wid {
-                    mouse_focus = Some(wid);
-                    sink.send_event(
-                        WindowEvent::CursorEntered {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                        },
-                        wid,
-                    );
-                    sink.send_event(
-                        WindowEvent::CursorMoved {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            position: (surface_x, surface_y).into(),
-                            // TODO: replace dummy value with actual modifier state
-                            modifiers: ModifiersState::default(),
-                        },
-                        wid,
-                    );
-                }
-            }
-            PtrEvent::Leave { surface, .. } => {
-                mouse_focus = None;
-                let wid = store.find_wid(&surface);
-                if let Some(wid) = wid {
-                    sink.send_event(
-                        WindowEvent::CursorLeft {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                        },
-                        wid,
-                    );
-                }
-            }
-            PtrEvent::Motion {
-                surface_x,
-                surface_y,
-                ..
-            } => {
-                if let Some(wid) = mouse_focus {
-                    sink.send_event(
-                        WindowEvent::CursorMoved {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            position: (surface_x, surface_y).into(),
-                            // TODO: replace dummy value with actual modifier state
-                            modifiers: ModifiersState::default(),
-                        },
-                        wid,
-                    );
-                }
-            }
-            PtrEvent::Button { button, state, .. } => {
-                if let Some(wid) = mouse_focus {
-                    let state = match state {
-                        wl_pointer::ButtonState::Pressed => ElementState::Pressed,
-                        wl_pointer::ButtonState::Released => ElementState::Released,
-                    };
-                    let button = match button {
-                        0x110 => MouseButton::Left,
-                        0x111 => MouseButton::Right,
-                        0x112 => MouseButton::Middle,
-                        // TODO figure out the translation ?
-                        _ => return,
-                    };
-                    sink.send_event(
-                        WindowEvent::MouseInput {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            state: state,
-                            button: button,
-                            // TODO: replace dummy value with actual modifier state
-                            modifiers: ModifiersState::default(),
-                        },
-                        wid,
-                    );
-                }
-            }
-            PtrEvent::Axis { axis, value, .. } => {
-                if let Some(wid) = mouse_focus {
-                    if pointer.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,
-                        }
+    seat.get_pointer(|pointer| {
+        pointer.implement(move |evt, pointer| {
+            let mut sink = sink.lock().unwrap();
+            let store = store.lock().unwrap();
+            match evt {
+                PtrEvent::Enter {
+                    surface,
+                    surface_x,
+                    surface_y,
+                    ..
+                } => {
+                    let wid = store.find_wid(&surface);
+                    if let Some(wid) = wid {
+                        mouse_focus = Some(wid);
                         sink.send_event(
-                            WindowEvent::MouseWheel {
+                            WindowEvent::CursorEntered {
                                 device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                                delta: MouseScrollDelta::PixelDelta((x as f64, y as f64).into()),
-                                phase: TouchPhase::Moved,
-                                // TODO: replace dummy value with actual modifier state
-                                modifiers: ModifiersState::default(),
                             },
                             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,
-                        }
-                        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(wid) = mouse_focus {
-                    if let Some((x, y)) = axis_discrete_buffer {
                         sink.send_event(
-                            WindowEvent::MouseWheel {
+                            WindowEvent::CursorMoved {
                                 device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                                delta: MouseScrollDelta::LineDelta(x as f32, y as f32),
-                                phase: axis_state,
-                                // TODO: replace dummy value with actual modifier state
-                                modifiers: ModifiersState::default(),
-                            },
-                            wid,
-                        );
-                    } else if let Some((x, y)) = axis_buffer {
-                        sink.send_event(
-                            WindowEvent::MouseWheel {
-                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                                delta: MouseScrollDelta::PixelDelta((x as f64, y as f64).into()),
-                                phase: axis_state,
-                                // TODO: replace dummy value with actual modifier state
-                                modifiers: ModifiersState::default(),
+                                position: (surface_x, surface_y).into(),
+                                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,
+                PtrEvent::Leave { surface, .. } => {
+                    mouse_focus = None;
+                    let wid = store.find_wid(&surface);
+                    if let Some(wid) = wid {
+                        sink.send_event(
+                            WindowEvent::CursorLeft {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                            },
+                            wid,
+                        );
+                    }
                 }
-                axis_discrete_buffer = Some((x, y));
-                axis_state = match axis_state {
-                    TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
-                    _ => TouchPhase::Started,
+                PtrEvent::Motion {
+                    surface_x,
+                    surface_y,
+                    ..
+                } => {
+                    if let Some(wid) = mouse_focus {
+                        sink.send_event(
+                            WindowEvent::CursorMoved {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                position: (surface_x, surface_y).into(),
+                                modifiers: modifiers_tracker.lock().unwrap().clone(),
+                            },
+                            wid,
+                        );
+                    }
+                }
+                PtrEvent::Button { button, state, .. } => {
+                    if let Some(wid) = mouse_focus {
+                        let state = match state {
+                            wl_pointer::ButtonState::Pressed => ElementState::Pressed,
+                            wl_pointer::ButtonState::Released => ElementState::Released,
+                        };
+                        let button = match button {
+                            0x110 => MouseButton::Left,
+                            0x111 => MouseButton::Right,
+                            0x112 => MouseButton::Middle,
+                            // TODO figure out the translation ?
+                            _ => return,
+                        };
+                        sink.send_event(
+                            WindowEvent::MouseInput {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                state: state,
+                                button: button,
+                                modifiers: modifiers_tracker.lock().unwrap().clone(),
+                            },
+                            wid,
+                        );
+                    }
+                }
+                PtrEvent::Axis { axis, value, .. } => {
+                    if let Some(wid) = mouse_focus {
+                        if pointer.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,
+                            }
+                            sink.send_event(
+                                WindowEvent::MouseWheel {
+                                    device_id: ::DeviceId(::platform::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,
+                            }
+                            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(wid) = mouse_focus {
+                        if let Some((x, y)) = axis_discrete_buffer {
+                            sink.send_event(
+                                WindowEvent::MouseWheel {
+                                    device_id: ::DeviceId(::platform::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_event(
+                                WindowEvent::MouseWheel {
+                                    device_id: ::DeviceId(::platform::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,
+                    }
+                    axis_discrete_buffer = Some((x, y));
+                    axis_state = match axis_state {
+                        TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
+                        _ => TouchPhase::Started,
+                    }
                 }
             }
-        }
-    })
+        }, ())
+    }).unwrap()
 }

src/platform/linux/wayland/touch.rs

@@ -6,8 +6,10 @@ use super::{DeviceId, WindowId};
 use super::event_loop::EventsLoopSink;
 use super::window::WindowStore;
 
-use sctk::reexports::client::{NewProxy, Proxy};
+use sctk::reexports::client::Proxy;
 use sctk::reexports::client::protocol::wl_touch::{Event as TouchEvent, WlTouch};
+use sctk::reexports::client::protocol::wl_seat;
+use sctk::reexports::client::protocol::wl_seat::RequestsTrait as SeatRequests;
 
 struct TouchPoint {
     wid: WindowId,
@@ -16,78 +18,80 @@ struct TouchPoint {
 }
 
 pub(crate) fn implement_touch(
-    touch: NewProxy<WlTouch>,
+    seat: &Proxy<wl_seat::WlSeat>,
     sink: Arc<Mutex<EventsLoopSink>>,
     store: Arc<Mutex<WindowStore>>,
 ) -> Proxy<WlTouch> {
     let mut pending_ids = Vec::new();
-    touch.implement(move |evt, _| {
-        let mut sink = sink.lock().unwrap();
-        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_event(
-                        WindowEvent::Touch(::Touch {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            phase: TouchPhase::Started,
-                            location: (x, y).into(),
-                            id: id as u64,
-                        }),
-                        wid,
-                    );
-                    pending_ids.push(TouchPoint {
-                        wid: wid,
-                        location: (x, y),
-                        id: id,
-                    });
+    seat.get_touch(|touch| {
+        touch.implement(move |evt, _| {
+            let mut sink = sink.lock().unwrap();
+            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_event(
+                            WindowEvent::Touch(::Touch {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                phase: TouchPhase::Started,
+                                location: (x, y).into(),
+                                id: id as u64,
+                            }),
+                            wid,
+                        );
+                        pending_ids.push(TouchPoint {
+                            wid: wid,
+                            location: (x, y),
+                            id: 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);
+                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_event(
+                            WindowEvent::Touch(::Touch {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                phase: TouchPhase::Ended,
+                                location: pt.location.into(),
+                                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_event(
+                            WindowEvent::Touch(::Touch {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                phase: TouchPhase::Moved,
+                                location: (x, y).into(),
+                                id: id as u64,
+                            }),
+                            pt.wid,
+                        );
+                    }
+                }
+                TouchEvent::Frame => (),
+                TouchEvent::Cancel => for pt in pending_ids.drain(..) {
                     sink.send_event(
                         WindowEvent::Touch(::Touch {
                             device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            phase: TouchPhase::Ended,
+                            phase: TouchPhase::Cancelled,
                             location: pt.location.into(),
-                            id: id as u64,
+                            id: pt.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_event(
-                        WindowEvent::Touch(::Touch {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            phase: TouchPhase::Moved,
-                            location: (x, y).into(),
-                            id: id as u64,
-                        }),
-                        pt.wid,
-                    );
-                }
-            }
-            TouchEvent::Frame => (),
-            TouchEvent::Cancel => for pt in pending_ids.drain(..) {
-                sink.send_event(
-                    WindowEvent::Touch(::Touch {
-                        device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                        phase: TouchPhase::Cancelled,
-                        location: pt.location.into(),
-                        id: pt.id as u64,
-                    }),
-                    pt.wid,
-                );
-            },
-        }
-    })
+        }, ())
+    }).unwrap()
 }

src/platform/linux/wayland/window.rs

@@ -1,15 +1,16 @@
+use raw_window_handle::unix::WaylandHandle;
 use std::collections::VecDeque;
 use std::sync::{Arc, Mutex, Weak};
 
 use {CreationError, MouseCursor, WindowAttributes};
 use dpi::{LogicalPosition, LogicalSize};
-use platform::MonitorId as PlatformMonitorId;
+use platform::{MonitorId as PlatformMonitorId, PlatformSpecificWindowBuilderAttributes as PlAttributes};
 use window::MonitorId as RootMonitorId;
 
-use sctk::window::{BasicFrame, Event as WEvent, Window as SWindow};
+use sctk::surface::{get_dpi_factor, get_outputs};
+use sctk::window::{ConceptFrame, Event as WEvent, State as WState, Window as SWindow, Theme};
 use sctk::reexports::client::{Display, Proxy};
-use sctk::reexports::client::protocol::{wl_seat, wl_surface, wl_output};
-use sctk::reexports::client::protocol::wl_compositor::RequestsTrait as CompositorRequests;
+use sctk::reexports::client::protocol::{wl_seat, wl_surface};
 use sctk::reexports::client::protocol::wl_surface::RequestsTrait as SurfaceRequests;
 use sctk::output::OutputMgr;
 
@@ -18,71 +19,44 @@ use platform::platform::wayland::event_loop::{get_available_monitors, get_primar
 
 pub struct Window {
     surface: Proxy<wl_surface::WlSurface>,
-    frame: Arc<Mutex<SWindow<BasicFrame>>>,
-    monitors: Arc<Mutex<MonitorList>>, // Monitors this window is currently on
+    frame: Arc<Mutex<SWindow<ConceptFrame>>>,
     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>>,
+    fullscreen: Arc<Mutex<bool>>,
 }
 
 impl Window {
-    pub fn new(evlp: &EventsLoop, attributes: WindowAttributes) -> Result<Window, CreationError> {
+    pub fn new(evlp: &EventsLoop, attributes: WindowAttributes, pl_attribs: PlAttributes) -> Result<Window, CreationError> {
         let (width, height) = attributes.dimensions.map(Into::into).unwrap_or((800, 600));
         // Create the window
         let size = Arc::new(Mutex::new((width, height)));
+        let fullscreen = Arc::new(Mutex::new(false));
 
-        // monitor tracking
-        let monitor_list = Arc::new(Mutex::new(MonitorList::new()));
-
-        let surface = evlp.env.compositor.create_surface().unwrap().implement({
-            let list = monitor_list.clone();
-            let omgr = evlp.env.outputs.clone();
-            let window_store = evlp.store.clone();
-            move |event, surface: Proxy<wl_surface::WlSurface>| match event {
-                wl_surface::Event::Enter { output } => {
-                    let dpi_change = list.lock().unwrap().add_output(MonitorId {
-                        proxy: output,
-                        mgr: omgr.clone(),
-                    });
-                    if let Some(dpi) = dpi_change {
-                        if surface.version() >= 3 {
-                            // without version 3 we can't be dpi aware
-                            window_store.lock().unwrap().dpi_change(&surface, dpi);
-                            surface.set_buffer_scale(dpi);
-                        }
-                    }
-                },
-                wl_surface::Event::Leave { output } => {
-                    let dpi_change = list.lock().unwrap().del_output(&output);
-                    if let Some(dpi) = dpi_change {
-                        if surface.version() >= 3 {
-                            // without version 3 we can't be dpi aware
-                            window_store.lock().unwrap().dpi_change(&surface, dpi);
-                            surface.set_buffer_scale(dpi);
-                        }
-                    }
-                }
-            }
+        let window_store = evlp.store.clone();
+        let surface = evlp.env.create_surface(move |dpi, surface| {
+            window_store.lock().unwrap().dpi_change(&surface, dpi);
+            surface.set_buffer_scale(dpi);
         });
 
         let window_store = evlp.store.clone();
         let my_surface = surface.clone();
-        let mut frame = SWindow::<BasicFrame>::init(
+        let mut frame = SWindow::<ConceptFrame>::init_from_env(
+            &evlp.env,
             surface.clone(),
             (width, height),
-            &evlp.env.compositor,
-            &evlp.env.subcompositor,
-            &evlp.env.shm,
-            &evlp.env.shell,
-            move |event, ()| match event {
-                WEvent::Configure { new_size, .. } => {
+            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.equals(&my_surface) {
                             window.newsize = new_size;
                             window.need_refresh = true;
+                            *(window.fullscreen.lock().unwrap()) = is_fullscreen;
                             *(window.need_frame_refresh.lock().unwrap()) = true;
                             return;
                         }
@@ -109,6 +83,12 @@ impl Window {
             },
         ).unwrap();
 
+        if let Some(app_id) = pl_attribs.app_id {
+            frame.set_app_id(app_id);
+        }
+
+        frame.set_title(attributes.title);
+
         for &(_, ref seat) in evlp.seats.lock().unwrap().iter() {
             frame.new_seat(seat);
         }
@@ -140,6 +120,7 @@ impl Window {
             closed: false,
             newsize: None,
             size: size.clone(),
+            fullscreen: fullscreen.clone(),
             need_refresh: false,
             need_frame_refresh: need_frame_refresh.clone(),
             surface: surface.clone(),
@@ -154,11 +135,11 @@ impl Window {
             display: evlp.display.clone(),
             surface: surface,
             frame: frame,
-            monitors: monitor_list,
             outputs: evlp.env.outputs.clone(),
             size: size,
             kill_switch: (kill_switch, evlp.cleanup_needed.clone()),
             need_frame_refresh: need_frame_refresh,
+            fullscreen: fullscreen,
         })
     }
 
@@ -234,7 +215,7 @@ impl Window {
 
     #[inline]
     pub fn hidpi_factor(&self) -> i32 {
-        self.monitors.lock().unwrap().compute_hidpi_factor()
+        get_dpi_factor(&self.surface)
     }
 
     pub fn set_decorations(&self, decorate: bool) {
@@ -250,6 +231,14 @@ impl Window {
         }
     }
 
+    pub fn get_fullscreen(&self) -> Option<MonitorId> {
+        if *(self.fullscreen.lock().unwrap()) {
+            Some(self.get_current_monitor())
+        } else {
+            None
+        }
+    }
+
     pub fn set_fullscreen(&self, monitor: Option<RootMonitorId>) {
         if let Some(RootMonitorId {
             inner: PlatformMonitorId::Wayland(ref monitor_id),
@@ -264,6 +253,11 @@ impl Window {
         }
     }
 
+
+    pub fn set_theme<T: Theme>(&self, theme: T) {
+        self.frame.lock().unwrap().set_theme(theme)
+    }
+
     #[inline]
     pub fn set_cursor(&self, _cursor: MouseCursor) {
         // TODO
@@ -293,10 +287,11 @@ impl Window {
     }
 
     pub fn get_current_monitor(&self) -> MonitorId {
-        // we don't know how much each monitor sees us so...
-        // just return the most recent one ?
-        let guard = self.monitors.lock().unwrap();
-        guard.monitors.last().unwrap().clone()
+        let output = get_outputs(&self.surface).last().unwrap().clone();
+        MonitorId {
+            proxy: output,
+            mgr: self.outputs.clone(),
+        }
     }
 
     pub fn get_available_monitors(&self) -> VecDeque<MonitorId> {
@@ -306,6 +301,14 @@ impl Window {
     pub fn get_primary_monitor(&self) -> MonitorId {
         get_primary_monitor(&self.outputs)
     }
+
+    pub fn raw_window_handle(&self) -> WaylandHandle {
+        WaylandHandle {
+            surface: self.get_surface().c_ptr() as *mut _,
+            display: self.get_display().c_ptr() as *mut _,
+            ..WaylandHandle::empty()
+        }
+    }
 }
 
 impl Drop for Window {
@@ -323,13 +326,14 @@ struct InternalWindow {
     surface: Proxy<wl_surface::WlSurface>,
     newsize: Option<(u32, u32)>,
     size: Arc<Mutex<(u32, u32)>>,
+    fullscreen: Arc<Mutex<bool>>,
     need_refresh: bool,
     need_frame_refresh: Arc<Mutex<bool>>,
     closed: bool,
     kill_switch: Arc<Mutex<bool>>,
-    frame: Weak<Mutex<SWindow<BasicFrame>>>,
+    frame: Weak<Mutex<SWindow<ConceptFrame>>>,
     current_dpi: i32,
-    new_dpi: Option<i32>
+    new_dpi: Option<i32>,
 }
 
 pub struct WindowStore {
@@ -385,7 +389,7 @@ impl WindowStore {
 
     pub fn for_each<F>(&mut self, mut f: F)
     where
-        F: FnMut(Option<(u32, u32)>, &mut (u32, u32), Option<i32>, bool, bool, bool, WindowId, Option<&mut SWindow<BasicFrame>>),
+        F: FnMut(Option<(u32, u32)>, &mut (u32, u32), Option<i32>, bool, bool, bool, WindowId, Option<&mut SWindow<ConceptFrame>>),
     {
         for window in &mut self.windows {
             let opt_arc = window.frame.upgrade();
@@ -409,50 +413,3 @@ impl WindowStore {
         }
     }
 }
-
-/*
- * Monitor list with some covenience method to compute DPI
- */
-
-struct MonitorList {
-    monitors: Vec<MonitorId>
-}
-
-impl MonitorList {
-    fn new() -> MonitorList {
-        MonitorList {
-            monitors: Vec::new()
-        }
-    }
-
-    fn compute_hidpi_factor(&self) -> i32 {
-        let mut factor = 1;
-        for monitor_id in &self.monitors {
-            let monitor_dpi = monitor_id.get_hidpi_factor();
-            if monitor_dpi > factor { factor = monitor_dpi; }
-        }
-        factor
-    }
-
-    fn add_output(&mut self, monitor: MonitorId) -> Option<i32> {
-        let old_dpi = self.compute_hidpi_factor();
-        let monitor_dpi = monitor.get_hidpi_factor();
-        self.monitors.push(monitor);
-        if monitor_dpi > old_dpi {
-            Some(monitor_dpi)
-        } else {
-            None
-        }
-    }
-
-    fn del_output(&mut self, output: &Proxy<wl_output::WlOutput>) -> Option<i32> {
-        let old_dpi = self.compute_hidpi_factor();
-        self.monitors.retain(|m| !m.proxy.equals(output));
-        let new_dpi = self.compute_hidpi_factor();
-        if new_dpi != old_dpi {
-            Some(new_dpi)
-        } else {
-            None
-        }
-    }
-}

src/platform/linux/x11/events.rs

@@ -82,11 +82,11 @@ pub fn keysym_to_element(keysym: libc::c_uint) -> Option<VirtualKeyCode> {
         ffi::XK_KP_Delete => events::VirtualKeyCode::Delete,
         ffi::XK_KP_Equal => events::VirtualKeyCode::NumpadEquals,
         //ffi::XK_KP_Multiply => events::VirtualKeyCode::NumpadMultiply,
-        //ffi::XK_KP_Add => events::VirtualKeyCode::NumpadAdd,
+        ffi::XK_KP_Add => events::VirtualKeyCode::Add,
         //ffi::XK_KP_Separator => events::VirtualKeyCode::Kp_separator,
-        //ffi::XK_KP_Subtract => events::VirtualKeyCode::NumpadSubtract,
+        ffi::XK_KP_Subtract => events::VirtualKeyCode::Subtract,
         //ffi::XK_KP_Decimal => events::VirtualKeyCode::Kp_decimal,
-        //ffi::XK_KP_Divide => events::VirtualKeyCode::NumpadDivide,
+        ffi::XK_KP_Divide => events::VirtualKeyCode::Divide,
         ffi::XK_KP_0 => events::VirtualKeyCode::Numpad0,
         ffi::XK_KP_1 => events::VirtualKeyCode::Numpad1,
         ffi::XK_KP_2 => events::VirtualKeyCode::Numpad2,
@@ -117,23 +117,23 @@ pub fn keysym_to_element(keysym: libc::c_uint) -> Option<VirtualKeyCode> {
         //ffi::XK_L4 => events::VirtualKeyCode::L4,
         ffi::XK_F15 => events::VirtualKeyCode::F15,
         //ffi::XK_L5 => events::VirtualKeyCode::L5,
-        //ffi::XK_F16 => events::VirtualKeyCode::F16,
+        ffi::XK_F16 => events::VirtualKeyCode::F16,
         //ffi::XK_L6 => events::VirtualKeyCode::L6,
-        //ffi::XK_F17 => events::VirtualKeyCode::F17,
+        ffi::XK_F17 => events::VirtualKeyCode::F17,
         //ffi::XK_L7 => events::VirtualKeyCode::L7,
-        //ffi::XK_F18 => events::VirtualKeyCode::F18,
+        ffi::XK_F18 => events::VirtualKeyCode::F18,
         //ffi::XK_L8 => events::VirtualKeyCode::L8,
-        //ffi::XK_F19 => events::VirtualKeyCode::F19,
+        ffi::XK_F19 => events::VirtualKeyCode::F19,
         //ffi::XK_L9 => events::VirtualKeyCode::L9,
-        //ffi::XK_F20 => events::VirtualKeyCode::F20,
+        ffi::XK_F20 => events::VirtualKeyCode::F20,
         //ffi::XK_L10 => events::VirtualKeyCode::L10,
-        //ffi::XK_F21 => events::VirtualKeyCode::F21,
+        ffi::XK_F21 => events::VirtualKeyCode::F21,
         //ffi::XK_R1 => events::VirtualKeyCode::R1,
-        //ffi::XK_F22 => events::VirtualKeyCode::F22,
+        ffi::XK_F22 => events::VirtualKeyCode::F22,
         //ffi::XK_R2 => events::VirtualKeyCode::R2,
-        //ffi::XK_F23 => events::VirtualKeyCode::F23,
+        ffi::XK_F23 => events::VirtualKeyCode::F23,
         //ffi::XK_R3 => events::VirtualKeyCode::R3,
-        //ffi::XK_F24 => events::VirtualKeyCode::F24,
+        ffi::XK_F24 => events::VirtualKeyCode::F24,
         //ffi::XK_R4 => events::VirtualKeyCode::R4,
         //ffi::XK_F25 => events::VirtualKeyCode::F25,
         //ffi::XK_R5 => events::VirtualKeyCode::R5,

src/platform/linux/x11/mod.rs

@@ -1,4 +1,4 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 
 pub mod ffi;
 mod events;
@@ -19,6 +19,13 @@ use std::collections::HashMap;
 use std::ffi::CStr;
 use std::ops::Deref;
 use std::os::raw::*;
+use libc::{select, fd_set, FD_SET, FD_ZERO, FD_ISSET, EINTR, EINVAL, ENOMEM, EBADF};
+#[cfg(target_os = "linux")]
+use libc::__errno_location;
+#[cfg(target_os = "freebsd")]
+use libc::__error as __errno_location;
+#[cfg(any(target_os = "netbsd", target_os = "openbsd"))]
+use libc::__errno as __errno_location;
 use std::sync::{Arc, mpsc, Weak};
 use std::sync::atomic::{self, AtomicBool};
 
@@ -185,6 +192,70 @@ impl EventsLoop {
         }
     }
 
+    unsafe fn poll_one_event(&mut self, event_ptr : *mut ffi::XEvent) -> bool {
+        // This function is used to poll and remove a single event
+        // from the Xlib event queue in a non-blocking, atomic way.
+        // XCheckIfEvent is non-blocking and removes events from queue.
+        // XNextEvent can't be used because it blocks while holding the
+        // global Xlib mutex.
+        // XPeekEvent does not remove events from the queue.
+        unsafe extern "C" fn predicate(
+            _display: *mut ffi::Display,
+            _event: *mut ffi::XEvent,
+            _arg : *mut c_char)  -> c_int {
+            // This predicate always returns "true" (1) to accept all events
+            1
+        }
+
+        let result = (self.xconn.xlib.XCheckIfEvent)(
+            self.xconn.display,
+            event_ptr,
+            Some(predicate),
+            std::ptr::null_mut());
+
+        result != 0
+    }
+
+    unsafe fn wait_for_input(&mut self) {
+        // XNextEvent can not be used in multi-threaded applications
+        // because it is blocking for input while holding the global
+        // Xlib mutex.
+        // To work around this issue, first flush the X11 display, then
+        // use select(2) to wait for input to arrive
+        loop {
+            // First use XFlush to flush any buffered x11 requests
+            (self.xconn.xlib.XFlush)(self.xconn.display);
+
+            // Then use select(2) to wait for input data
+            let mut fds : fd_set = mem::uninitialized();
+            FD_ZERO(&mut fds);
+            FD_SET(self.xconn.x11_fd, &mut fds);
+            let err = select(
+                self.xconn.x11_fd + 1,
+                &mut fds, // read fds
+                std::ptr::null_mut(), // write fds
+                std::ptr::null_mut(), // except fds (could be used to detect errors)
+                std::ptr::null_mut()); // timeout
+
+            if err < 0 {
+                let errno_ptr = __errno_location();
+                let errno = *errno_ptr;
+
+                if errno == EINTR {
+                    // try again if errno is EINTR
+                    continue;
+                }
+
+                assert!(errno == EBADF || errno == EINVAL || errno == ENOMEM);
+                panic!("select(2) returned fatal error condition");
+            }
+
+            if FD_ISSET(self.xconn.x11_fd, &mut fds) {
+                break;
+            }
+        }
+    }
+
     pub fn poll_events<F>(&mut self, mut callback: F)
         where F: FnMut(Event)
     {
@@ -192,13 +263,9 @@ impl EventsLoop {
         loop {
             // Get next event
             unsafe {
-                // Ensure XNextEvent won't block
-                let count = (self.xconn.xlib.XPending)(self.xconn.display);
-                if count == 0 {
+                if !self.poll_one_event(&mut xev) {
                     break;
                 }
-
-                (self.xconn.xlib.XNextEvent)(self.xconn.display, &mut xev);
             }
             self.process_event(&mut xev, &mut callback);
         }
@@ -210,7 +277,12 @@ impl EventsLoop {
         let mut xev = unsafe { mem::uninitialized() };
 
         loop {
-            unsafe { (self.xconn.xlib.XNextEvent)(self.xconn.display, &mut xev) }; // Blocks as necessary
+            unsafe {
+                while !self.poll_one_event(&mut xev) {
+                    // block until input is available
+                    self.wait_for_input();
+                }
+            };
 
             let mut control_flow = ControlFlow::Continue;
 
@@ -278,25 +350,25 @@ impl EventsLoop {
                     }
                 } else if client_msg.message_type == self.dnd.atoms.position {
                     // This event occurs every time the mouse moves while a file's being dragged
-                    // over our window. We emit HoveredFile in response; while the Mac OS X backend
-                    // does that upon a drag entering, XDnD doesn't have access to the actual drop
+                    // over our window. We emit HoveredFile in response; while the macOS backend
+                    // does that upon a drag entering, XDND doesn't have access to the actual drop
                     // data until this event. For parity with other platforms, we only emit
-                    // HoveredFile the first time, though if winit's API is later extended to
-                    // supply position updates with HoveredFile or another event, implementing
+                    // `HoveredFile` the first time, though if winit's API is later extended to
+                    // supply position updates with `HoveredFile` or another event, implementing
                     // that here would be trivial.
 
                     let source_window = client_msg.data.get_long(0) as c_ulong;
 
-                    // Equivalent to (x << shift) | y
-                    // where shift = mem::size_of::<c_short>() * 8
+                    // Equivalent to `(x << shift) | y`
+                    // where `shift = mem::size_of::<c_short>() * 8`
                     // Note that coordinates are in "desktop space", not "window space"
-                    // (in x11 parlance, they're root window coordinates)
+                    // (in X11 parlance, they're root window coordinates)
                     //let packed_coordinates = client_msg.data.get_long(2);
                     //let shift = mem::size_of::<libc::c_short>() * 8;
                     //let x = packed_coordinates >> shift;
                     //let y = packed_coordinates & !(x << shift);
 
-                    // By our own state flow, version should never be None at this point.
+                    // By our own state flow, `version` should never be `None` at this point.
                     let version = self.dnd.version.unwrap_or(5);
 
                     // Action is specified in versions 2 and up, though we don't need it anyway.
@@ -318,23 +390,21 @@ impl EventsLoop {
                                     // In version 0, time isn't specified
                                     ffi::CurrentTime
                                 };
-                                // This results in the SelectionNotify event below
+                                // This results in the `SelectionNotify` event below
                                 self.dnd.convert_selection(window, time);
                             }
                             self.dnd.send_status(window, source_window, DndState::Accepted)
-                                .expect("Failed to send XDnD status message.");
+                                .expect("Failed to send `XdndStatus` message.");
                         }
                     } else {
                         unsafe {
                             self.dnd.send_status(window, source_window, DndState::Rejected)
-                                .expect("Failed to send XDnD status message.");
-                            self.dnd.send_finished(window, source_window, DndState::Rejected)
-                                .expect("Failed to send XDnD finished message.");
+                                .expect("Failed to send `XdndStatus` message.");
                         }
                         self.dnd.reset();
                     }
                 } else if client_msg.message_type == self.dnd.atoms.drop {
-                    if let Some(source_window) = self.dnd.source_window {
+                    let (source_window, state) = if let Some(source_window) = self.dnd.source_window {
                         if let Some(Ok(ref path_list)) = self.dnd.result {
                             for path in path_list {
                                 callback(Event::WindowEvent {
@@ -343,10 +413,16 @@ impl EventsLoop {
                                 });
                             }
                         }
-                        unsafe {
-                            self.dnd.send_finished(window, source_window, DndState::Accepted)
-                                .expect("Failed to send XDnD finished message.");
-                        }
+                        (source_window, DndState::Accepted)
+                    } else {
+                        // `source_window` won't be part of our DND state if we already rejected the drop in our
+                        // `XdndPosition` handler.
+                        let source_window = client_msg.data.get_long(0) as c_ulong;
+                        (source_window, DndState::Rejected)
+                    };
+                    unsafe {
+                        self.dnd.send_finished(window, source_window, state)
+                            .expect("Failed to send `XdndFinished` message.");
                     }
                     self.dnd.reset();
                 } else if client_msg.message_type == self.dnd.atoms.leave {
@@ -412,10 +488,10 @@ impl EventsLoop {
                     let new_inner_size = (xev.width as u32, xev.height as u32);
                     let new_inner_position = (xev.x as i32, xev.y as i32);
 
-                    let monitor = window.get_current_monitor(); // This must be done *before* locking!
+                    let mut monitor = window.get_current_monitor(); // This must be done *before* locking!
                     let mut shared_state_lock = window.shared_state.lock();
 
-                    let (resized, moved) = {
+                    let (mut resized, moved) = {
                         let resized = util::maybe_change(&mut shared_state_lock.size, new_inner_size);
                         let moved = if is_synthetic {
                             util::maybe_change(&mut shared_state_lock.inner_position, new_inner_position)
@@ -435,32 +511,8 @@ impl EventsLoop {
                         (resized, moved)
                     };
 
-                    // This is a hack to ensure that the DPI adjusted resize is actually applied on all WMs. KWin
-                    // doesn't need this, but Xfwm does.
-                    if let Some(adjusted_size) = shared_state_lock.dpi_adjusted {
-                        let rounded_size = (adjusted_size.0.round() as u32, adjusted_size.1.round() as u32);
-                        if new_inner_size == rounded_size {
-                            // When this finally happens, the event will not be synthetic.
-                            shared_state_lock.dpi_adjusted = None;
-                        } else {
-                            unsafe {
-                                (self.xconn.xlib.XResizeWindow)(
-                                    self.xconn.display,
-                                    xwindow,
-                                    rounded_size.0 as c_uint,
-                                    rounded_size.1 as c_uint,
-                                );
-                            }
-                        }
-                    }
-
                     let mut events = Events::default();
 
-                    if resized {
-                        let logical_size = LogicalSize::from_physical(new_inner_size, monitor.hidpi_factor);
-                        events.resized = Some(WindowEvent::Resized(logical_size));
-                    }
-
                     let new_outer_position = if moved || shared_state_lock.position.is_none() {
                         // We need to convert client area position to window position.
                         let frame_extents = shared_state_lock.frame_extents
@@ -482,36 +534,66 @@ impl EventsLoop {
                         shared_state_lock.position.unwrap()
                     };
 
-                    // If we don't use the existing adjusted value when available, then the user can screw up the
-                    // resizing by dragging across monitors *without* dropping the window.
-                    let (width, height) = shared_state_lock.dpi_adjusted
-                        .unwrap_or_else(|| (xev.width as f64, xev.height as f64));
-                    let last_hidpi_factor = if shared_state_lock.is_new_window {
-                        shared_state_lock.is_new_window = false;
-                        1.0
-                    } else {
-                        shared_state_lock.last_monitor
-                            .as_ref()
-                            .map(|last_monitor| last_monitor.hidpi_factor)
-                            .unwrap_or(1.0)
-                    };
-                    let new_hidpi_factor = {
-                        let window_rect = util::Rect::new(new_outer_position, new_inner_size);
-                        let monitor = self.xconn.get_monitor_for_window(Some(window_rect));
-                        let new_hidpi_factor = monitor.hidpi_factor;
-                        shared_state_lock.last_monitor = Some(monitor);
-                        new_hidpi_factor
-                    };
-                    if last_hidpi_factor != new_hidpi_factor {
-                        events.dpi_changed = Some(WindowEvent::HiDpiFactorChanged(new_hidpi_factor));
-                        let (new_width, new_height, flusher) = window.adjust_for_dpi(
-                            last_hidpi_factor,
-                            new_hidpi_factor,
-                            width,
-                            height,
-                        );
-                        flusher.queue();
-                        shared_state_lock.dpi_adjusted = Some((new_width, new_height));
+                    if is_synthetic {
+                        // If we don't use the existing adjusted value when available, then the user can screw up the
+                        // resizing by dragging across monitors *without* dropping the window.
+                        let (width, height) = shared_state_lock.dpi_adjusted
+                            .unwrap_or_else(|| (xev.width as f64, xev.height as f64));
+                        let last_hidpi_factor = shared_state_lock.guessed_dpi
+                            .take()
+                            .unwrap_or_else(|| {
+                                shared_state_lock.last_monitor
+                                    .as_ref()
+                                    .map(|last_monitor| last_monitor.hidpi_factor)
+                                    .unwrap_or(1.0)
+                            });
+                        let new_hidpi_factor = {
+                            let window_rect = util::AaRect::new(new_outer_position, new_inner_size);
+                            monitor = self.xconn.get_monitor_for_window(Some(window_rect));
+                            let new_hidpi_factor = monitor.hidpi_factor;
+                            shared_state_lock.last_monitor = Some(monitor.clone());
+                            new_hidpi_factor
+                        };
+                        if last_hidpi_factor != new_hidpi_factor {
+                            events.dpi_changed = Some(WindowEvent::HiDpiFactorChanged(new_hidpi_factor));
+                            let (new_width, new_height, flusher) = window.adjust_for_dpi(
+                                last_hidpi_factor,
+                                new_hidpi_factor,
+                                width,
+                                height,
+                            );
+                            flusher.queue();
+                            shared_state_lock.dpi_adjusted = Some((new_width, new_height));
+                            // if the DPI factor changed, force a resize event to ensure the logical
+                            // size is computed with the right DPI factor
+                            resized = true;
+                        }
+                    }
+
+                    // This is a hack to ensure that the DPI adjusted resize is actually applied on all WMs. KWin
+                    // doesn't need this, but Xfwm does. The hack should not be run on other WMs, since tiling
+                    // WMs constrain the window size, making the resize fail. This would cause an endless stream of
+                    // XResizeWindow requests, making Xorg, the winit client, and the WM consume 100% of CPU.
+                    if let Some(adjusted_size) = shared_state_lock.dpi_adjusted {
+                        let rounded_size = (adjusted_size.0.round() as u32, adjusted_size.1.round() as u32);
+                        if new_inner_size == rounded_size || !util::wm_name_is_one_of(&["Xfwm4"]) {
+                            // When this finally happens, the event will not be synthetic.
+                            shared_state_lock.dpi_adjusted = None;
+                        } else {
+                            unsafe {
+                                (self.xconn.xlib.XResizeWindow)(
+                                    self.xconn.display,
+                                    xwindow,
+                                    rounded_size.0 as c_uint,
+                                    rounded_size.1 as c_uint,
+                                );
+                            }
+                        }
+                    }
+
+                    if resized {
+                        let logical_size = LogicalSize::from_physical(new_inner_size, monitor.hidpi_factor);
+                        events.resized = Some(WindowEvent::Resized(logical_size));
                     }
 
                     events
@@ -519,15 +601,15 @@ impl EventsLoop {
 
                 if let Some(events) = events {
                     let window_id = mkwid(xwindow);
+                    if let Some(event) = events.dpi_changed {
+                        callback(Event::WindowEvent { window_id, event });
+                    }
                     if let Some(event) = events.resized {
                         callback(Event::WindowEvent { window_id, event });
                     }
                     if let Some(event) = events.moved {
                         callback(Event::WindowEvent { window_id, event });
                     }
-                    if let Some(event) = events.dpi_changed {
-                        callback(Event::WindowEvent { window_id, event });
-                    }
                 }
             }
 
@@ -592,7 +674,7 @@ impl EventsLoop {
 
                 // Standard virtual core keyboard ID. XInput2 needs to be used to get a reliable
                 // value, though this should only be an issue under multiseat configurations.
-                let device = 3;
+                let device = util::VIRTUAL_CORE_KEYBOARD;
                 let device_id = mkdid(device);
 
                 // When a compose sequence or IME pre-edit is finished, it ends in a KeyPress with
@@ -856,20 +938,26 @@ impl EventsLoop {
                             event: CursorEntered { device_id },
                         });
 
-                        // The mods field on this event isn't actually populated, so query the
-                        // pointer device. In the future, we can likely remove this round-trip by
-                        // relying on Xkb for modifier values.
-                        let modifiers = self.xconn.query_pointer(xev.event, xev.deviceid)
-                            .expect("Failed to query pointer device").get_modifier_state();
-
-                        let dpi_factor = self.with_window(xev.event, |window| {
+                        if let Some(dpi_factor) = self.with_window(xev.event, |window| {
                             window.get_hidpi_factor()
-                        });
-                        if let Some(dpi_factor) = dpi_factor {
+                        }) {
                             let position = LogicalPosition::from_physical(
                                 (xev.event_x as f64, xev.event_y as f64),
                                 dpi_factor,
                             );
+
+                            // The mods field on this event isn't actually populated, so query the
+                            // pointer device. In the future, we can likely remove this round-trip by
+                            // relying on `Xkb` for modifier values.
+                            //
+                            // This needs to only be done after confirming the window still exists,
+                            // since otherwise we risk getting a `BadWindow` error if the window was
+                            // dropped with queued events.
+                            let modifiers = self.xconn
+                                .query_pointer(xev.event, xev.deviceid)
+                                .expect("Failed to query pointer device")
+                                .get_modifier_state();
+
                             callback(Event::WindowEvent {
                                 window_id,
                                 event: CursorMoved {
@@ -1246,9 +1334,21 @@ 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/linux/x11/monitor.rs

@@ -55,7 +55,7 @@ pub struct MonitorId {
     /// The DPI scale factor
     pub(crate) hidpi_factor: f64,
     /// Used to determine which windows are on this monitor
-    pub(crate) rect: util::Rect,
+    pub(crate) rect: util::AaRect,
 }
 
 impl MonitorId {
@@ -65,11 +65,11 @@ impl MonitorId {
         id: u32,
         repr: util::MonitorRepr,
         primary: bool,
-    ) -> Self {
-        let (name, hidpi_factor) = unsafe { xconn.get_output_info(resources, &repr) };
+    ) -> Option<Self> {
+        let (name, hidpi_factor) = unsafe { xconn.get_output_info(resources, &repr)? };
         let (dimensions, position) = unsafe { (repr.get_dimensions(), repr.get_position()) };
-        let rect = util::Rect::new(position, dimensions);
-        MonitorId {
+        let rect = util::AaRect::new(position, dimensions);
+        Some(MonitorId {
             id,
             name,
             hidpi_factor,
@@ -77,7 +77,7 @@ impl MonitorId {
             position,
             primary,
             rect,
-        }
+        })
     }
 
     pub fn get_name(&self) -> Option<String> {
@@ -104,7 +104,7 @@ impl MonitorId {
 }
 
 impl XConnection {
-    pub fn get_monitor_for_window(&self, window_rect: Option<util::Rect>) -> MonitorId {
+    pub fn get_monitor_for_window(&self, window_rect: Option<util::AaRect>) -> MonitorId {
         let monitors = self.get_available_monitors();
         let default = monitors
             .get(0)
@@ -131,9 +131,14 @@ impl XConnection {
     fn query_monitor_list(&self) -> Vec<MonitorId> {
         unsafe {
             let root = (self.xlib.XDefaultRootWindow)(self.display);
-            // WARNING: this function is supposedly very slow, on the order of hundreds of ms.
-            // Upon failure, `resources` will be null.
-            let resources = (self.xrandr.XRRGetScreenResources)(self.display, root);
+            let resources = if version_is_at_least(1, 3) {
+                (self.xrandr.XRRGetScreenResourcesCurrent)(self.display, root)
+            } else {
+                // WARNING: this function is supposedly very slow, on the order of hundreds of ms.
+                // Upon failure, `resources` will be null.
+                (self.xrandr.XRRGetScreenResources)(self.display, root)
+            };
+
             if resources.is_null() {
                 panic!("[winit] `XRRGetScreenResources` returned NULL. That should only happen if the root window doesn't exist.");
             }
@@ -153,13 +158,13 @@ impl XConnection {
                     let monitor = monitors.offset(monitor_index as isize);
                     let is_primary = (*monitor).primary != 0;
                     has_primary |= is_primary;
-                    available.push(MonitorId::from_repr(
+                    MonitorId::from_repr(
                         self,
                         resources,
                         monitor_index as u32,
                         monitor.into(),
                         is_primary,
-                    ));
+                    ).map(|monitor_id| available.push(monitor_id));
                 }
                 (xrandr_1_5.XRRFreeMonitors)(monitors);
             } else {
@@ -176,13 +181,13 @@ impl XConnection {
                         let crtc = util::MonitorRepr::from(crtc);
                         let is_primary = crtc.get_output() == primary;
                         has_primary |= is_primary;
-                        available.push(MonitorId::from_repr(
+                        MonitorId::from_repr(
                             self,
                             resources,
                             crtc_id as u32,
                             crtc,
                             is_primary,
-                        ));
+                        ).map(|monitor_id| available.push(monitor_id));
                     }
                     (self.xrandr.XRRFreeCrtcInfo)(crtc);
                 }

src/platform/linux/x11/util/format.rs

@@ -50,7 +50,7 @@ pub trait Formattable: Debug + Clone + Copy + PartialEq + PartialOrd {
 }
 
 // You might be surprised by the absence of c_int, but not as surprised as X11 would be by the presence of it.
-impl Formattable for c_char { const FORMAT: Format = Format::Char; }
+impl Formattable for c_schar { const FORMAT: Format = Format::Char; }
 impl Formattable for c_uchar { const FORMAT: Format = Format::Char; }
 impl Formattable for c_short { const FORMAT: Format = Format::Short; }
 impl Formattable for c_ushort { const FORMAT: Format = Format::Short; }

src/platform/linux/x11/util/geometry.rs

@@ -3,34 +3,34 @@ use std::cmp;
 use super::*;
 use {LogicalPosition, LogicalSize};
 
+// Friendly neighborhood axis-aligned rectangle
 #[derive(Debug, Clone, PartialEq, Eq)]
-pub struct Rect {
-    left: i64,
-    right: i64,
-    top: i64,
-    bottom: i64,
+pub struct AaRect {
+    x: i64,
+    y: i64,
+    width: i64,
+    height: i64,
 }
 
-impl Rect {
+impl AaRect {
     pub fn new((x, y): (i32, i32), (width, height): (u32, u32)) -> Self {
         let (x, y) = (x as i64, y as i64);
         let (width, height) = (width as i64, height as i64);
-        Rect {
-            left: x,
-            right: x + width,
-            top: y,
-            bottom: y + height,
-        }
+        AaRect { x, y, width, height }
+    }
+
+    pub fn contains_point(&self, x: i64, y: i64) -> bool {
+        x >= self.x && x <= self.x + self.width && y >= self.y && y <= self.y + self.height
     }
 
     pub fn get_overlapping_area(&self, other: &Self) -> i64 {
         let x_overlap = cmp::max(
             0,
-            cmp::min(self.right, other.right) - cmp::max(self.left, other.left),
+            cmp::min(self.x + self.width, other.x + other.width) - cmp::max(self.x, other.x),
         );
         let y_overlap = cmp::max(
             0,
-            cmp::min(self.bottom, other.bottom) - cmp::max(self.top, other.top),
+            cmp::min(self.y + self.height, other.y + other.height) - cmp::max(self.y, other.y),
         );
         x_overlap * y_overlap
     }

src/platform/linux/x11/util/hint.rs

@@ -22,8 +22,9 @@ impl From<bool> for StateOperation {
 }
 
 /// X window type. Maps directly to
-/// [`_NET_WM_WINDOW_TYPE`](https://specifications.freedesktop.org/wm-spec/1.3/ar01s05.html).
+/// [`_NET_WM_WINDOW_TYPE`](https://specifications.freedesktop.org/wm-spec/wm-spec-1.5.html).
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum WindowType {
     /// A desktop feature. This can include a single window containing desktop icons with the same dimensions as the
     /// screen, allowing the desktop environment to have full control of the desktop, without the need for proxying
@@ -41,6 +42,24 @@ pub enum WindowType {
     Splash,
     /// This is a dialog window.
     Dialog,
+    /// A dropdown menu that usually appears when the user clicks on an item in a menu bar.
+    /// This property is typically used on override-redirect windows.
+    DropdownMenu,
+    /// A popup menu that usually appears when the user right clicks on an object.
+    /// This property is typically used on override-redirect windows.
+    PopupMenu,
+    /// A tooltip window. Usually used to show additional information when hovering over an object with the cursor.
+    /// This property is typically used on override-redirect windows.
+    Tooltip,
+    /// The window is a notification.
+    /// This property is typically used on override-redirect windows.
+    Notification,
+    /// This should be used on the windows that are popped up by combo boxes.
+    /// This property is typically used on override-redirect windows.
+    Combo,
+    /// This indicates the the window is being dragged.
+    /// This property is typically used on override-redirect windows.
+    Dnd,
     /// This is a normal, top-level window.
     Normal,
 }
@@ -62,6 +81,12 @@ impl WindowType {
             &Utility => b"_NET_WM_WINDOW_TYPE_UTILITY\0",
             &Splash => b"_NET_WM_WINDOW_TYPE_SPLASH\0",
             &Dialog => b"_NET_WM_WINDOW_TYPE_DIALOG\0",
+            &DropdownMenu => b"_NET_WM_WINDOW_TYPE_DROPDOWN_MENU\0",
+            &PopupMenu => b"_NET_WM_WINDOW_TYPE_POPUP_MENU\0",
+            &Tooltip => b"_NET_WM_WINDOW_TYPE_TOOLTIP\0",
+            &Notification => b"_NET_WM_WINDOW_TYPE_NOTIFICATION\0",
+            &Combo => b"_NET_WM_WINDOW_TYPE_COMBO\0",
+            &Dnd => b"_NET_WM_WINDOW_TYPE_DND\0",
             &Normal => b"_NET_WM_WINDOW_TYPE_NORMAL\0",
         };
         unsafe { xconn.get_atom_unchecked(atom_name) }

src/platform/linux/x11/util/input.rs

@@ -3,6 +3,9 @@ use std::str;
 use super::*;
 use events::ModifiersState;
 
+pub const VIRTUAL_CORE_POINTER: c_int = 2;
+pub const VIRTUAL_CORE_KEYBOARD: c_int = 3;
+
 // A base buffer size of 1kB uses a negligible amount of RAM while preventing us from having to
 // re-allocate (and make another round-trip) in the *vast* majority of cases.
 // To test if `lookup_utf8` works correctly, set this to 1.
@@ -24,8 +27,8 @@ pub struct PointerState<'a> {
     xconn: &'a XConnection,
     root: ffi::Window,
     child: ffi::Window,
-    root_x: c_double,
-    root_y: c_double,
+    pub root_x: c_double,
+    pub root_y: c_double,
     win_x: c_double,
     win_y: c_double,
     buttons: ffi::XIButtonState,

src/platform/linux/x11/util/randr.rs

@@ -23,7 +23,8 @@ pub fn calc_dpi_factor(
     }
 
     // See http://xpra.org/trac/ticket/728 for more information.
-    if width_mm == 0 || width_mm == 0 {
+    if width_mm == 0 || height_mm == 0 {
+        warn!("XRandR reported that the display's 0mm in size, which is certifiably insane");
         return 1.0;
     }
 
@@ -78,22 +79,56 @@ impl From<*mut ffi::XRRCrtcInfo> for MonitorRepr {
 }
 
 impl XConnection {
-    pub unsafe fn get_output_info(&self, resources: *mut ffi::XRRScreenResources, repr: &MonitorRepr) -> (String, f64) {
+    // Retrieve DPI from Xft.dpi property
+    pub unsafe fn get_xft_dpi(&self) -> Option<f64> {
+        (self.xlib.XrmInitialize)();
+        let resource_manager_str = (self.xlib.XResourceManagerString)(self.display);
+        if resource_manager_str == ptr::null_mut() {
+            return None;
+        }
+        if let Ok(res) = ::std::ffi::CStr::from_ptr(resource_manager_str).to_str() {
+            let name : &str = "Xft.dpi:\t";
+            for pair in res.split("\n") {
+                if pair.starts_with(&name) {
+                    let res = &pair[name.len()..];
+                    return f64::from_str(&res).ok();
+                }
+            }
+        }
+        None
+    }
+    pub unsafe fn get_output_info(
+        &self,
+        resources: *mut ffi::XRRScreenResources,
+        repr: &MonitorRepr,
+    ) -> Option<(String, f64)> {
         let output_info = (self.xrandr.XRRGetOutputInfo)(
             self.display,
             resources,
             repr.get_output(),
         );
+        if output_info.is_null() {
+            // When calling `XRRGetOutputInfo` on a virtual monitor (versus a physical display)
+            // it's possible for it to return null.
+            // https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=816596
+            let _ = self.check_errors(); // discard `BadRROutput` error
+            return None;
+        }
         let name_slice = slice::from_raw_parts(
             (*output_info).name as *mut u8,
             (*output_info).nameLen as usize,
         );
         let name = String::from_utf8_lossy(name_slice).into();
-        let hidpi_factor = calc_dpi_factor(
-            repr.get_dimensions(),
-            ((*output_info).mm_width as u64, (*output_info).mm_height as u64),
-        );
+        let hidpi_factor = if let Some(dpi) = self.get_xft_dpi() {
+            dpi / 96.
+        } else {
+            calc_dpi_factor(
+                repr.get_dimensions(),
+                ((*output_info).mm_width as u64, (*output_info).mm_height as u64),
+            )
+        };
+
         (self.xrandr.XRRFreeOutputInfo)(output_info);
-        (name, hidpi_factor)
+        Some((name, hidpi_factor))
     }
 }

src/platform/linux/x11/window.rs

@@ -1,3 +1,4 @@
+use raw_window_handle::unix::XlibHandle;
 use std::{cmp, env, mem};
 use std::ffi::CString;
 use std::os::raw::*;
@@ -29,15 +30,15 @@ unsafe extern "C" fn visibility_predicate(
 
 #[derive(Debug, Default)]
 pub struct SharedState {
-    // Window creation assumes a DPI factor of 1.0, so we use this flag to handle that special case.
-    pub is_new_window: bool,
     pub cursor_pos: Option<(f64, f64)>,
     pub size: Option<(u32, u32)>,
     pub position: Option<(i32, i32)>,
     pub inner_position: Option<(i32, i32)>,
     pub inner_position_rel_parent: Option<(i32, i32)>,
+    pub guessed_dpi: Option<f64>,
     pub last_monitor: Option<X11MonitorId>,
     pub dpi_adjusted: Option<(f64, f64)>,
+    pub fullscreen: Option<RootMonitorId>,
     // Used to restore position after exiting fullscreen.
     pub restore_position: Option<(i32, i32)>,
     pub frame_extents: Option<util::FrameExtentsHeuristic>,
@@ -46,9 +47,9 @@ pub struct SharedState {
 }
 
 impl SharedState {
-    fn new() -> Mutex<Self> {
+    fn new(dpi_factor: f64) -> Mutex<Self> {
         let mut shared_state = SharedState::default();
-        shared_state.is_new_window = true;
+        shared_state.guessed_dpi = Some(dpi_factor);
         Mutex::new(shared_state)
     }
 }
@@ -78,15 +79,51 @@ impl UnownedWindow {
         let xconn = &event_loop.xconn;
         let root = event_loop.root;
 
-        let max_dimensions: Option<(u32, u32)> = window_attrs.max_dimensions.map(Into::into);
-        let min_dimensions: Option<(u32, u32)> = window_attrs.min_dimensions.map(Into::into);
+        let monitors = xconn.get_available_monitors();
+        let dpi_factor = if !monitors.is_empty() {
+            let mut dpi_factor = Some(monitors[0].get_hidpi_factor());
+            for monitor in &monitors {
+                if Some(monitor.get_hidpi_factor()) != dpi_factor {
+                    dpi_factor = None;
+                }
+            }
+            dpi_factor.unwrap_or_else(|| {
+                xconn.query_pointer(root, util::VIRTUAL_CORE_POINTER)
+                    .ok()
+                    .and_then(|pointer_state| {
+                        let (x, y) = (pointer_state.root_x as i64, pointer_state.root_y as i64);
+                        let mut dpi_factor = None;
+                        for monitor in &monitors {
+                            if monitor.rect.contains_point(x, y) {
+                                dpi_factor = Some(monitor.get_hidpi_factor());
+                                break;
+                            }
+                        }
+                        dpi_factor
+                    })
+                    .unwrap_or(1.0)
+            })
+        } else {
+            return Err(OsError(format!("No monitors were detected.")));
+        };
+
+        info!("Guessed window DPI factor: {}", dpi_factor);
+
+        let max_dimensions: Option<(u32, u32)> = window_attrs.max_dimensions.map(|size| {
+            size.to_physical(dpi_factor).into()
+        });
+        let min_dimensions: Option<(u32, u32)> = window_attrs.min_dimensions.map(|size| {
+            size.to_physical(dpi_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 = window_attrs.dimensions
+            let mut dimensions: (u32, u32) = window_attrs.dimensions
+                .or_else(|| Some((800, 600).into()))
+                .map(|size| size.to_physical(dpi_factor))
                 .map(Into::into)
-                .unwrap_or((800, 600));
+                .unwrap();
             if let Some(max) = max_dimensions {
                 dimensions.0 = cmp::min(dimensions.0, max.0);
                 dimensions.1 = cmp::min(dimensions.1, max.1);
@@ -95,6 +132,7 @@ impl UnownedWindow {
                 dimensions.0 = cmp::max(dimensions.0, min.0);
                 dimensions.1 = cmp::max(dimensions.1, min.1);
             }
+            debug!("Calculated physical dimensions: {}x{}", dimensions.0, dimensions.1);
             dimensions
         };
 
@@ -166,7 +204,7 @@ impl UnownedWindow {
             cursor_hidden: Default::default(),
             ime_sender: Mutex::new(event_loop.ime_sender.clone()),
             multitouch: window_attrs.multitouch,
-            shared_state: SharedState::new(),
+            shared_state: SharedState::new(dpi_factor),
         };
 
         // Title must be set before mapping. Some tiling window managers (i.e. i3) use the window
@@ -236,17 +274,27 @@ impl UnownedWindow {
                 window.set_window_type(pl_attribs.x11_window_type).queue();
             }
 
+            if let Some(variant) = pl_attribs.gtk_theme_variant {
+                window.set_gtk_theme_variant(variant).queue();
+            }
+
             // set size hints
             {
-                let mut min_dimensions = window_attrs.min_dimensions;
-                let mut max_dimensions = window_attrs.max_dimensions;
-                if !window_attrs.resizable && !util::wm_name_is_one_of(&["Xfwm4"]) {
-                    max_dimensions = Some(dimensions.into());
-                    min_dimensions = Some(dimensions.into());
+                let mut min_dimensions = window_attrs.min_dimensions
+                    .map(|size| size.to_physical(dpi_factor));
+                let mut max_dimensions = window_attrs.max_dimensions
+                    .map(|size| size.to_physical(dpi_factor));
+                if !window_attrs.resizable {
+                    if util::wm_name_is_one_of(&["Xfwm4"]) {
+                        warn!("To avoid a WM bug, disabling resizing has no effect on Xfwm4");
+                    } else {
+                        max_dimensions = Some(dimensions.into());
+                        min_dimensions = Some(dimensions.into());
 
-                    let mut shared_state_lock = window.shared_state.lock();
-                    shared_state_lock.min_dimensions = window_attrs.min_dimensions;
-                    shared_state_lock.max_dimensions = window_attrs.max_dimensions;
+                        let mut shared_state_lock = window.shared_state.lock();
+                        shared_state_lock.min_dimensions = window_attrs.min_dimensions;
+                        shared_state_lock.max_dimensions = window_attrs.max_dimensions;
+                    }
                 }
 
                 let mut normal_hints = util::NormalHints::new(xconn);
@@ -417,6 +465,19 @@ impl UnownedWindow {
         )
     }
 
+    fn set_gtk_theme_variant(&self, variant: String) -> util::Flusher {
+        let hint_atom = unsafe { self.xconn.get_atom_unchecked(b"_GTK_THEME_VARIANT\0") };
+        let utf8_atom = unsafe { self.xconn.get_atom_unchecked(b"UTF8_STRING\0") };
+        let variant = CString::new(variant).expect("`_GTK_THEME_VARIANT` contained null byte");
+        self.xconn.change_property(
+            self.xwindow,
+            hint_atom,
+            utf8_atom,
+            util::PropMode::Replace,
+            variant.as_bytes(),
+        )
+    }
+
     #[inline]
     pub fn set_urgent(&self, is_urgent: bool) {
         let mut wm_hints = self.xconn.get_wm_hints(self.xwindow).expect("`XGetWMHints` failed");
@@ -474,18 +535,24 @@ impl UnownedWindow {
         }
     }
 
+    #[inline]
+    pub fn get_fullscreen(&self) -> Option<RootMonitorId> {
+        self.shared_state.lock().fullscreen.clone()
+    }
+
     #[inline]
     pub fn set_fullscreen(&self, monitor: Option<RootMonitorId>) {
+        self.shared_state.lock().fullscreen = monitor.clone();
         self.set_fullscreen_inner(monitor)
             .flush()
             .expect("Failed to change window fullscreen state");
         self.invalidate_cached_frame_extents();
     }
 
-    fn get_rect(&self) -> Option<util::Rect> {
+    fn get_rect(&self) -> Option<util::AaRect> {
         // TODO: This might round-trip more times than needed.
         if let (Some(position), Some(size)) = (self.get_position_physical(), self.get_outer_size_physical()) {
-            Some(util::Rect::new(position, size))
+            Some(util::AaRect::new(position, size))
         } else {
             None
         }
@@ -543,7 +610,7 @@ impl UnownedWindow {
                 wm_name_atom,
                 utf8_atom,
                 util::PropMode::Replace,
-                title.as_bytes_with_nul(),
+                title.as_bytes(),
             )
         }
     }
@@ -853,6 +920,7 @@ impl UnownedWindow {
             // Making the window unresizable on Xfwm prevents further changes to `WM_NORMAL_HINTS` from being detected.
             // This makes it impossible for resizing to be re-enabled, and also breaks DPI scaling. As such, we choose
             // the lesser of two evils and do nothing.
+            warn!("To avoid a WM bug, disabling resizing has no effect on Xfwm4");
             return;
         }
 
@@ -1150,4 +1218,13 @@ impl UnownedWindow {
 
     #[inline]
     pub fn id(&self) -> WindowId { WindowId(self.xwindow) }
+
+    #[inline]
+    pub fn raw_window_handle(&self) -> XlibHandle {
+        XlibHandle {
+            window: self.xwindow,
+            display: self.xconn.display as _,
+            ..XlibHandle::empty()
+        }
+    }
 }

src/platform/linux/x11/xdisplay.rs

@@ -1,6 +1,7 @@
 use std::ptr;
 use std::fmt;
 use std::error::Error;
+use std::os::raw::c_int;
 
 use libc;
 use parking_lot::Mutex;
@@ -18,6 +19,7 @@ pub struct XConnection {
     pub xinput2: ffi::XInput2,
     pub xlib_xcb: ffi::Xlib_xcb,
     pub display: *mut ffi::Display,
+    pub x11_fd: c_int,
     pub latest_error: Mutex<Option<XError>>,
 }
 
@@ -48,6 +50,11 @@ impl XConnection {
             display
         };
 
+        // Get X11 socket file descriptor
+        let fd = unsafe {
+            (xlib.XConnectionNumber)(display)
+        };
+
         Ok(XConnection {
             xlib,
             xrandr,
@@ -56,6 +63,7 @@ impl XConnection {
             xinput2,
             xlib_xcb,
             display,
+            x11_fd: fd,
             latest_error: Mutex::new(None),
         })
     }

src/platform/macos/events_loop.rs

@@ -180,7 +180,7 @@ impl EventsLoop {
         where F: FnMut(Event),
     {
         unsafe {
-            if !msg_send![cocoa::base::class("NSThread"), isMainThread] {
+            if !msg_send![class!(NSThread), isMainThread] {
                 panic!("Events can only be polled from the main thread on macOS");
             }
         }
@@ -221,7 +221,7 @@ impl EventsLoop {
         where F: FnMut(Event) -> ControlFlow
     {
         unsafe {
-            if !msg_send![cocoa::base::class("NSThread"), isMainThread] {
+            if !msg_send![class!(NSThread), isMainThread] {
                 panic!("Events can only be polled from the main thread on macOS");
             }
         }
@@ -315,6 +315,27 @@ impl EventsLoop {
             });
 
         match event_type {
+            // https://github.com/glfw/glfw/blob/50eccd298a2bbc272b4977bd162d3e4b55f15394/src/cocoa_window.m#L881
+            appkit::NSKeyUp  => {
+                if let Some(key_window) = maybe_key_window() {
+                    if event_mods(ns_event).logo {
+                        let _: () = msg_send![*key_window.window, sendEvent:ns_event];
+                    }
+                }
+                None
+            },
+            // similar to above, but for `<Cmd-.>`, the keyDown is suppressed instead of the
+            // KeyUp, and the above trick does not appear to work.
+            appkit::NSKeyDown => {
+                let modifiers = event_mods(ns_event);
+                let keycode = NSEvent::keyCode(ns_event);
+                if modifiers.logo && keycode == 47 {
+                    modifier_event(ns_event, NSEventModifierFlags::NSCommandKeyMask, false)
+                        .map(into_event)
+                } else {
+                    None
+                }
+            },
             appkit::NSFlagsChanged => {
                 let mut events = std::collections::VecDeque::new();
 
@@ -523,7 +544,67 @@ impl Proxy {
     }
 }
 
-pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
+pub fn char_to_keycode(c: char) -> Option<events::VirtualKeyCode> {
+    // We only translate keys that are affected by keyboard layout.
+    //
+    // Note that since keys are translated in a somewhat "dumb" way (reading character)
+    // there is a concern that some combination, i.e. Cmd+char, causes the wrong
+    // letter to be received, and so we receive the wrong key.
+    //
+    // Implementation reference: https://github.com/WebKit/webkit/blob/82bae82cf0f329dbe21059ef0986c4e92fea4ba6/Source/WebCore/platform/cocoa/KeyEventCocoa.mm#L626
+    Some(match c {
+        'a' | 'A' => events::VirtualKeyCode::A,
+        'b' | 'B' => events::VirtualKeyCode::B,
+        'c' | 'C' => events::VirtualKeyCode::C,
+        'd' | 'D' => events::VirtualKeyCode::D,
+        'e' | 'E' => events::VirtualKeyCode::E,
+        'f' | 'F' => events::VirtualKeyCode::F,
+        'g' | 'G' => events::VirtualKeyCode::G,
+        'h' | 'H' => events::VirtualKeyCode::H,
+        'i' | 'I' => events::VirtualKeyCode::I,
+        'j' | 'J' => events::VirtualKeyCode::J,
+        'k' | 'K' => events::VirtualKeyCode::K,
+        'l' | 'L' => events::VirtualKeyCode::L,
+        'm' | 'M' => events::VirtualKeyCode::M,
+        'n' | 'N' => events::VirtualKeyCode::N,
+        'o' | 'O' => events::VirtualKeyCode::O,
+        'p' | 'P' => events::VirtualKeyCode::P,
+        'q' | 'Q' => events::VirtualKeyCode::Q,
+        'r' | 'R' => events::VirtualKeyCode::R,
+        's' | 'S' => events::VirtualKeyCode::S,
+        't' | 'T' => events::VirtualKeyCode::T,
+        'u' | 'U' => events::VirtualKeyCode::U,
+        'v' | 'V' => events::VirtualKeyCode::V,
+        'w' | 'W' => events::VirtualKeyCode::W,
+        'x' | 'X' => events::VirtualKeyCode::X,
+        'y' | 'Y' => events::VirtualKeyCode::Y,
+        'z' | 'Z' => events::VirtualKeyCode::Z,
+        '1' | '!' => events::VirtualKeyCode::Key1,
+        '2' | '@' => events::VirtualKeyCode::Key2,
+        '3' | '#' => events::VirtualKeyCode::Key3,
+        '4' | '$' => events::VirtualKeyCode::Key4,
+        '5' | '%' => events::VirtualKeyCode::Key5,
+        '6' | '^' => events::VirtualKeyCode::Key6,
+        '7' | '&' => events::VirtualKeyCode::Key7,
+        '8' | '*' => events::VirtualKeyCode::Key8,
+        '9' | '(' => events::VirtualKeyCode::Key9,
+        '0' | ')' => events::VirtualKeyCode::Key0,
+        '=' | '+' => events::VirtualKeyCode::Equals,
+        '-' | '_' => events::VirtualKeyCode::Minus,
+        ']' | '}' => events::VirtualKeyCode::RBracket,
+        '[' | '{' => events::VirtualKeyCode::LBracket,
+        '\''| '"' => events::VirtualKeyCode::Apostrophe,
+        ';' | ':' => events::VirtualKeyCode::Semicolon,
+        '\\'| '|' => events::VirtualKeyCode::Backslash,
+        ',' | '<' => events::VirtualKeyCode::Comma,
+        '/' | '?' => events::VirtualKeyCode::Slash,
+        '.' | '>' => events::VirtualKeyCode::Period,
+        '`' | '~' => events::VirtualKeyCode::Grave,
+        _ => return None,
+    })
+}
+
+pub fn scancode_to_keycode(code: c_ushort) -> Option<events::VirtualKeyCode> {
     Some(match code {
         0x00 => events::VirtualKeyCode::A,
         0x01 => events::VirtualKeyCode::S,
@@ -579,8 +660,8 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x33 => events::VirtualKeyCode::Back,
         //0x34 => unkown,
         0x35 => events::VirtualKeyCode::Escape,
-        0x36 => events::VirtualKeyCode::LWin,
-        0x37 => events::VirtualKeyCode::RWin,
+        0x36 => events::VirtualKeyCode::RWin,
+        0x37 => events::VirtualKeyCode::LWin,
         0x38 => events::VirtualKeyCode::LShift,
         //0x39 => Caps lock,
         0x3a => events::VirtualKeyCode::LAlt,
@@ -589,7 +670,7 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x3d => events::VirtualKeyCode::RAlt,
         0x3e => events::VirtualKeyCode::RControl,
         //0x3f => Fn key,
-        //0x40 => F17 Key,
+        0x40 => events::VirtualKeyCode::F17,
         0x41 => events::VirtualKeyCode::Decimal,
         //0x42 -> unkown,
         0x43 => events::VirtualKeyCode::Multiply,
@@ -602,10 +683,11 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x4a => events::VirtualKeyCode::VolumeDown,
         0x4b => events::VirtualKeyCode::Divide,
         0x4c => events::VirtualKeyCode::NumpadEnter,
+        0x4e => events::VirtualKeyCode::Subtract,
         //0x4d => unkown,
         0x4e => events::VirtualKeyCode::Subtract,
-        //0x4f => F18 key,
-        //0x50 => F19 Key,
+        0x4f => events::VirtualKeyCode::F18,
+        0x50 => events::VirtualKeyCode::F19,
         0x51 => events::VirtualKeyCode::NumpadEquals,
         0x52 => events::VirtualKeyCode::Numpad0,
         0x53 => events::VirtualKeyCode::Numpad1,
@@ -615,11 +697,11 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x57 => events::VirtualKeyCode::Numpad5,
         0x58 => events::VirtualKeyCode::Numpad6,
         0x59 => events::VirtualKeyCode::Numpad7,
-        //0x5a => F20 Key,
+        0x5a => events::VirtualKeyCode::F20,
         0x5b => events::VirtualKeyCode::Numpad8,
         0x5c => events::VirtualKeyCode::Numpad9,
-        //0x5d => unkown,
-        //0x5e => unkown,
+        0x5d => events::VirtualKeyCode::Yen,
+        //0x5e => JIS Ro,
         //0x5f => unkown,
         0x60 => events::VirtualKeyCode::F5,
         0x61 => events::VirtualKeyCode::F6,
@@ -627,11 +709,11 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x63 => events::VirtualKeyCode::F3,
         0x64 => events::VirtualKeyCode::F8,
         0x65 => events::VirtualKeyCode::F9,
-        //0x66 => unkown,
+        //0x66 => JIS Eisuu (macOS),
         0x67 => events::VirtualKeyCode::F11,
-        //0x68 => unkown,
+        //0x68 => JIS Kana (macOS),
         0x69 => events::VirtualKeyCode::F13,
-        //0x6a => F16 Key,
+        0x6a => events::VirtualKeyCode::F16,
         0x6b => events::VirtualKeyCode::F14,
         //0x6c => unkown,
         0x6d => events::VirtualKeyCode::F10,
@@ -659,6 +741,22 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
     })
 }
 
+pub fn check_function_keys(
+    s: &String
+) -> Option<events::VirtualKeyCode> {
+    if let Some(ch) = s.encode_utf16().next() {
+        return Some(match ch {
+            0xf718 => events::VirtualKeyCode::F21,
+            0xf719 => events::VirtualKeyCode::F22,
+            0xf71a => events::VirtualKeyCode::F23,
+            0xf71b => events::VirtualKeyCode::F24,
+            _ => return None,
+        })
+    }
+
+    None
+}
+
 pub fn event_mods(event: cocoa::base::id) -> ModifiersState {
     let flags = unsafe {
         NSEvent::modifierFlags(event)
@@ -671,22 +769,36 @@ pub fn event_mods(event: cocoa::base::id) -> ModifiersState {
     }
 }
 
+pub fn get_scancode(event: cocoa::base::id) -> c_ushort {
+    // In AppKit, `keyCode` refers to the position (scancode) of a key rather than its character,
+    // and there is no easy way to navtively retrieve the layout-dependent character.
+    // In winit, we use keycode to refer to the key's character, and so this function aligns
+    // AppKit's terminology with ours.
+    unsafe {
+        msg_send![event, keyCode]
+    }
+}
+
 unsafe fn modifier_event(
     ns_event: cocoa::base::id,
     keymask: NSEventModifierFlags,
-    key_pressed: bool,
+    was_key_pressed: bool,
 ) -> Option<WindowEvent> {
-    if !key_pressed && NSEvent::modifierFlags(ns_event).contains(keymask)
-    || key_pressed && !NSEvent::modifierFlags(ns_event).contains(keymask) {
-        let state = ElementState::Released;
-        let keycode = NSEvent::keyCode(ns_event);
-        let scancode = keycode as u32;
-        let virtual_keycode = to_virtual_key_code(keycode);
+    if !was_key_pressed && NSEvent::modifierFlags(ns_event).contains(keymask)
+    || was_key_pressed && !NSEvent::modifierFlags(ns_event).contains(keymask) {
+        let state = if was_key_pressed {
+            ElementState::Released
+        } else {
+            ElementState::Pressed
+        };
+
+        let scancode = get_scancode(ns_event);
+        let virtual_keycode = scancode_to_keycode(scancode);
         Some(WindowEvent::KeyboardInput {
             device_id: DEVICE_ID,
             input: KeyboardInput {
                 state,
-                scancode,
+                scancode: scancode as u32,
                 virtual_keycode,
                 modifiers: event_mods(ns_event),
             },

src/platform/macos/ffi.rs

@@ -2,7 +2,7 @@
 
 #![allow(dead_code, non_snake_case, non_upper_case_globals)]
 
-use cocoa::base::{class, id};
+use cocoa::base::id;
 use cocoa::foundation::{NSInteger, NSUInteger};
 use objc;
 
@@ -35,7 +35,7 @@ unsafe impl objc::Encode for NSRange {
 
 pub trait NSMutableAttributedString: Sized {
     unsafe fn alloc(_: Self) -> id {
-        msg_send![class("NSMutableAttributedString"), alloc]
+        msg_send![class!(NSMutableAttributedString), alloc]
     }
 
     unsafe fn init(self) -> id; // *mut NSMutableAttributedString

src/platform/macos/mod.rs

@@ -8,6 +8,12 @@ use std::sync::Arc;
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId;
 
+impl DeviceId {
+    pub unsafe fn dummy() -> Self {
+        DeviceId
+    }
+}
+
 use {CreationError};
 
 pub struct Window {

src/platform/macos/util/cursor.rs

@@ -0,0 +1,149 @@
+use cocoa::{
+    appkit::NSImage, base::{id, nil, YES},
+    foundation::{NSDictionary, NSPoint, NSString},
+};
+use objc::runtime::Sel;
+
+use super::IntoOption;
+use MouseCursor;
+
+pub enum Cursor {
+    Native(&'static str),
+    Undocumented(&'static str),
+    WebKit(&'static str),
+}
+
+impl From<MouseCursor> for Cursor {
+    fn from(cursor: MouseCursor) -> Self {
+        match cursor {
+            MouseCursor::Arrow | MouseCursor::Default => Cursor::Native("arrowCursor"),
+            MouseCursor::Hand => Cursor::Native("pointingHandCursor"),
+            MouseCursor::Grabbing | MouseCursor::Grab => Cursor::Native("closedHandCursor"),
+            MouseCursor::Text => Cursor::Native("IBeamCursor"),
+            MouseCursor::VerticalText => Cursor::Native("IBeamCursorForVerticalLayout"),
+            MouseCursor::Copy => Cursor::Native("dragCopyCursor"),
+            MouseCursor::Alias => Cursor::Native("dragLinkCursor"),
+            MouseCursor::NotAllowed | MouseCursor::NoDrop => Cursor::Native("operationNotAllowedCursor"),
+            MouseCursor::ContextMenu => Cursor::Native("contextualMenuCursor"),
+            MouseCursor::Crosshair => Cursor::Native("crosshairCursor"),
+            MouseCursor::EResize => Cursor::Native("resizeRightCursor"),
+            MouseCursor::NResize => Cursor::Native("resizeUpCursor"),
+            MouseCursor::WResize => Cursor::Native("resizeLeftCursor"),
+            MouseCursor::SResize => Cursor::Native("resizeDownCursor"),
+            MouseCursor::EwResize | MouseCursor::ColResize => Cursor::Native("resizeLeftRightCursor"),
+            MouseCursor::NsResize | MouseCursor::RowResize => Cursor::Native("resizeUpDownCursor"),
+
+            // Undocumented cursors: https://stackoverflow.com/a/46635398/5435443
+            MouseCursor::Help => Cursor::Undocumented("_helpCursor"),
+            MouseCursor::ZoomIn => Cursor::Undocumented("_zoomInCursor"),
+            MouseCursor::ZoomOut => Cursor::Undocumented("_zoomOutCursor"),
+            MouseCursor::NeResize => Cursor::Undocumented("_windowResizeNorthEastCursor"),
+            MouseCursor::NwResize => Cursor::Undocumented("_windowResizeNorthWestCursor"),
+            MouseCursor::SeResize => Cursor::Undocumented("_windowResizeSouthEastCursor"),
+            MouseCursor::SwResize => Cursor::Undocumented("_windowResizeSouthWestCursor"),
+            MouseCursor::NeswResize => Cursor::Undocumented("_windowResizeNorthEastSouthWestCursor"),
+            MouseCursor::NwseResize => Cursor::Undocumented("_windowResizeNorthWestSouthEastCursor"),
+
+            // While these are available, the former just loads a white arrow,
+            // and the latter loads an ugly deflated beachball!
+            // MouseCursor::Move => Cursor::Undocumented("_moveCursor"),
+            // MouseCursor::Wait => Cursor::Undocumented("_waitCursor"),
+
+            // An even more undocumented cursor...
+            // https://bugs.eclipse.org/bugs/show_bug.cgi?id=522349
+            // This is the wrong semantics for `Wait`, but it's the same as
+            // what's used in Safari and Chrome.
+            MouseCursor::Wait | MouseCursor::Progress => Cursor::Undocumented("busyButClickableCursor"),
+
+            // For the rest, we can just snatch the cursors from WebKit...
+            // They fit the style of the native cursors, and will seem
+            // completely standard to macOS users.
+            // https://stackoverflow.com/a/21786835/5435443
+            MouseCursor::Move | MouseCursor::AllScroll => Cursor::WebKit("move"),
+            MouseCursor::Cell => Cursor::WebKit("cell"),
+        }
+    }
+}
+
+impl Default for Cursor {
+    fn default() -> Self {
+        Cursor::Native("arrowCursor")
+    }
+}
+
+impl Cursor {
+    pub unsafe fn load(&self) -> id {
+        match self {
+            Cursor::Native(cursor_name) => {
+                let sel = Sel::register(cursor_name);
+                msg_send![class!(NSCursor), performSelector:sel]
+            },
+            Cursor::Undocumented(cursor_name) => {
+                let class = class!(NSCursor);
+                let sel = Sel::register(cursor_name);
+                let sel = if msg_send![class, respondsToSelector:sel] {
+                    sel
+                } else {
+                    warn!("Cursor `{}` appears to be invalid", cursor_name);
+                    sel!(arrowCursor)
+                };
+                msg_send![class, performSelector:sel]
+            },
+            Cursor::WebKit(cursor_name) => load_webkit_cursor(cursor_name)
+                .unwrap_or_else(|message| {
+                    warn!("{}", message);
+                    Self::default().load()
+                }),
+        }
+    }
+}
+
+// Note that loading `busybutclickable` with this code won't animate the frames;
+// instead you'll just get them all in a column.
+unsafe fn load_webkit_cursor(cursor_name_str: &str) -> Result<id, String> {
+    static CURSOR_ROOT: &'static str = "/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/HIServices.framework/Versions/A/Resources/cursors";
+    let cursor_root = NSString::alloc(nil).init_str(CURSOR_ROOT);
+    let cursor_name = NSString::alloc(nil).init_str(cursor_name_str);
+    let cursor_pdf = NSString::alloc(nil).init_str("cursor.pdf");
+    let cursor_plist = NSString::alloc(nil).init_str("info.plist");
+    let key_x = NSString::alloc(nil).init_str("hotx");
+    let key_y = NSString::alloc(nil).init_str("hoty");
+
+    let cursor_path: id = msg_send![cursor_root,
+        stringByAppendingPathComponent:cursor_name
+    ];
+    let pdf_path: id = msg_send![cursor_path,
+        stringByAppendingPathComponent:cursor_pdf
+    ];
+    let info_path: id = msg_send![cursor_path,
+        stringByAppendingPathComponent:cursor_plist
+    ];
+
+    let image = NSImage::alloc(nil)
+        .initByReferencingFile_(pdf_path)
+        // This will probably never be `None`, since images are loaded lazily...
+        .into_option()
+        // because of that, we need to check for validity.
+        .filter(|image| image.isValid() == YES)
+        .ok_or_else(||
+            format!("Failed to read image for `{}` cursor", cursor_name_str)
+        )?;
+    let info = NSDictionary::dictionaryWithContentsOfFile_(nil, info_path)
+        .into_option()
+        .ok_or_else(||
+            format!("Failed to read info for `{}` cursor", cursor_name_str)
+        )?;
+    let x = info.valueForKey_(key_x);
+    let y = info.valueForKey_(key_y);
+    let point = NSPoint::new(
+        msg_send![x, doubleValue],
+        msg_send![y, doubleValue],
+    );
+    let cursor: id = msg_send![class!(NSCursor), alloc];
+    let cursor: id = msg_send![cursor, initWithImage:image hotSpot:point];
+    cursor
+        .into_option()
+        .ok_or_else(||
+            format!("Failed to initialize `{}` cursor", cursor_name_str)
+        )
+}

src/platform/macos/util/into_option.rs

@@ -0,0 +1,14 @@
+use cocoa::base::{id, nil};
+
+pub trait IntoOption: Sized {
+    fn into_option(self) -> Option<Self>;
+}
+
+impl IntoOption for id {
+    fn into_option(self) -> Option<Self> {
+        match self != nil {
+            true => Some(self),
+            false => None,
+        }
+    }
+}

src/platform/macos/util/mod.rs

@@ -1,7 +1,13 @@
+mod cursor;
+mod into_option;
+
+pub use self::{cursor::Cursor, into_option::IntoOption};
+
 use cocoa::appkit::NSWindowStyleMask;
-use cocoa::base::{class, id, nil};
+use cocoa::base::{id, nil};
 use cocoa::foundation::{NSRect, NSUInteger};
 use core_graphics::display::CGDisplay;
+use objc::runtime::{Class, Object};
 
 use platform::platform::ffi;
 use platform::platform::window::IdRef;
@@ -25,14 +31,33 @@ pub unsafe fn set_style_mask(window: id, view: id, mask: NSWindowStyleMask) {
     window.makeFirstResponder_(view);
 }
 
+pub unsafe fn toggle_style_mask(window: id, view: id, mask: NSWindowStyleMask, on: bool) {
+    use cocoa::appkit::NSWindow;
+
+    let current_style_mask = window.styleMask();
+    if on {
+        window.setStyleMask_(current_style_mask | mask);
+    } else {
+        window.setStyleMask_(current_style_mask & (!mask));
+    }
+
+    // If we don't do this, key handling will break. Therefore, never call `setStyleMask` directly!
+    window.makeFirstResponder_(view);
+}
+
+pub unsafe fn superclass<'a>(this: &'a Object) -> &'a Class {
+    let superclass: id = msg_send![this, superclass];
+    &*(superclass as *const _)
+}
+
 pub unsafe fn create_input_context(view: id) -> IdRef {
-    let input_context: id = msg_send![class("NSTextInputContext"), alloc];
+    let input_context: id = msg_send![class!(NSTextInputContext), alloc];
     let input_context: id = msg_send![input_context, initWithClient:view];
     IdRef::new(input_context)
 }
 
 #[allow(dead_code)]
 pub unsafe fn open_emoji_picker() {
-    let app: id = msg_send![class("NSApplication"), sharedApplication];
+    let app: id = msg_send![class!(NSApplication), sharedApplication];
     let _: () = msg_send![app, orderFrontCharacterPalette:nil];
 }

src/platform/macos/view.rs

@@ -5,41 +5,46 @@ use std::{slice, str};
 use std::boxed::Box;
 use std::collections::VecDeque;
 use std::os::raw::*;
-use std::sync::Weak;
+use std::sync::{Arc, Mutex, Weak};
 
-use cocoa::base::{class, id, nil};
+use cocoa::base::{id, nil};
 use cocoa::appkit::{NSEvent, NSView, NSWindow};
 use cocoa::foundation::{NSPoint, NSRect, NSSize, NSString, NSUInteger};
 use objc::declare::ClassDecl;
-use objc::runtime::{Class, Object, Protocol, Sel, BOOL};
+use objc::runtime::{Class, Object, Protocol, Sel, BOOL, YES};
 
 use {ElementState, Event, KeyboardInput, MouseButton, WindowEvent, WindowId};
-use platform::platform::events_loop::{DEVICE_ID, event_mods, Shared, to_virtual_key_code};
+use platform::platform::events_loop::{DEVICE_ID, event_mods, Shared, scancode_to_keycode, char_to_keycode, check_function_keys, get_scancode};
 use platform::platform::util;
 use platform::platform::ffi::*;
 use platform::platform::window::{get_window_id, IdRef};
+use events;
 
 struct ViewState {
     window: id,
     shared: Weak<Shared>,
+    cursor: Arc<Mutex<util::Cursor>>,
     ime_spot: Option<(f64, f64)>,
     raw_characters: Option<String>,
-    last_insert: Option<String>,
+    is_key_down: bool,
 }
 
-pub fn new_view(window: id, shared: Weak<Shared>) -> IdRef {
+pub fn new_view(window: id, shared: Weak<Shared>) -> (IdRef, Weak<Mutex<util::Cursor>>) {
+    let cursor = Default::default();
+    let cursor_access = Arc::downgrade(&cursor);
     let state = ViewState {
         window,
         shared,
+        cursor,
         ime_spot: None,
         raw_characters: None,
-        last_insert: None,
+        is_key_down: false,
     };
     unsafe {
         // This is free'd in `dealloc`
         let state_ptr = Box::into_raw(Box::new(state)) as *mut c_void;
         let view: id = msg_send![VIEW_CLASS.0, alloc];
-        IdRef::new(msg_send![view, initWithWinit:state_ptr])
+        (IdRef::new(msg_send![view, initWithWinit:state_ptr]), cursor_access)
     }
 }
 
@@ -64,13 +69,21 @@ unsafe impl Sync for ViewClass {}
 
 lazy_static! {
     static ref VIEW_CLASS: ViewClass = unsafe {
-        let superclass = Class::get("NSView").unwrap();
+        let superclass = class!(NSView);
         let mut decl = ClassDecl::new("WinitView", superclass).unwrap();
         decl.add_method(sel!(dealloc), dealloc as extern fn(&Object, Sel));
         decl.add_method(
             sel!(initWithWinit:),
             init_with_winit as extern fn(&Object, Sel, *mut c_void) -> id,
         );
+        decl.add_method(
+            sel!(drawRect:),
+            draw_rect as extern fn(&Object, Sel, NSRect),
+        );
+        decl.add_method(
+            sel!(resetCursorRects),
+            reset_cursor_rects as extern fn(&Object, Sel),
+        );
         decl.add_method(sel!(hasMarkedText), has_marked_text as extern fn(&Object, Sel) -> BOOL);
         decl.add_method(
             sel!(markedRange),
@@ -122,6 +135,7 @@ lazy_static! {
         decl.add_method(sel!(mouseDragged:), mouse_dragged as extern fn(&Object, Sel, id));
         decl.add_method(sel!(rightMouseDragged:), right_mouse_dragged as extern fn(&Object, Sel, id));
         decl.add_method(sel!(otherMouseDragged:), other_mouse_dragged as extern fn(&Object, Sel, id));
+        decl.add_method(sel!(_wantsKeyDownForEvent:), wants_key_down_for_event as extern fn(&Object, Sel, id) -> BOOL);
         decl.add_ivar::<*mut c_void>("winitState");
         decl.add_ivar::<id>("markedText");
         let protocol = Protocol::get("NSTextInputClient").unwrap();
@@ -153,6 +167,41 @@ extern fn init_with_winit(this: &Object, _sel: Sel, state: *mut c_void) -> id {
     }
 }
 
+extern fn draw_rect(this: &Object, _sel: Sel, rect: NSRect) {
+    unsafe {
+        let state_ptr: *mut c_void = *this.get_ivar("winitState");
+        let state = &mut *(state_ptr as *mut ViewState);
+
+        if let Some(shared) = state.shared.upgrade() {
+            let window_event = Event::WindowEvent {
+                window_id: WindowId(get_window_id(state.window)),
+                event: WindowEvent::Refresh,
+            };
+            shared.pending_events
+                .lock()
+                .unwrap()
+                .push_back(window_event);
+        }
+
+        let superclass = util::superclass(this);
+        let () = msg_send![super(this, superclass), drawRect:rect];
+    }
+}
+
+extern fn reset_cursor_rects(this: &Object, _sel: Sel) {
+    unsafe {
+        let state_ptr: *mut c_void = *this.get_ivar("winitState");
+        let state = &mut *(state_ptr as *mut ViewState);
+
+        let bounds: NSRect = msg_send![this, bounds];
+        let cursor = state.cursor.lock().unwrap().load();
+        let _: () = msg_send![this,
+            addCursorRect:bounds
+            cursor:cursor
+        ];
+    }
+}
+
 extern fn has_marked_text(this: &Object, _sel: Sel) -> BOOL {
     //println!("hasMarkedText");
     unsafe {
@@ -191,7 +240,7 @@ extern fn set_marked_text(
         let marked_text_ref: &mut id = this.get_mut_ivar("markedText");
         let _: () = msg_send![(*marked_text_ref), release];
         let marked_text = NSMutableAttributedString::alloc(nil);
-        let has_attr = msg_send![string, isKindOfClass:class("NSAttributedString")];
+        let has_attr = msg_send![string, isKindOfClass:class!(NSAttributedString)];
         if has_attr {
             marked_text.initWithAttributedString(string);
         } else {
@@ -214,7 +263,7 @@ extern fn unmark_text(this: &Object, _sel: Sel) {
 
 extern fn valid_attributes_for_marked_text(_this: &Object, _sel: Sel) -> id {
     //println!("validAttributesForMarkedText");
-    unsafe { msg_send![class("NSArray"), array] }
+    unsafe { msg_send![class!(NSArray), array] }
 }
 
 extern fn attributed_substring_for_proposed_range(
@@ -265,7 +314,7 @@ extern fn insert_text(this: &Object, _sel: Sel, string: id, _replacement_range:
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);
 
-        let has_attr = msg_send![string, isKindOfClass:class("NSAttributedString")];
+        let has_attr = msg_send![string, isKindOfClass:class!(NSAttributedString)];
         let characters = if has_attr {
             // This is a *mut NSAttributedString
             msg_send![string, string]
@@ -279,10 +328,10 @@ extern fn insert_text(this: &Object, _sel: Sel, string: id, _replacement_range:
             characters.len(),
         );
         let string = str::from_utf8_unchecked(slice);
-        state.last_insert = Some(string.to_owned());
+        state.is_key_down = true;
 
         // We don't need this now, but it's here if that changes.
-        //let event: id = msg_send![class("NSApp"), currentEvent];
+        //let event: id = msg_send![class!(NSApp), currentEvent];
 
         let mut events = VecDeque::with_capacity(characters.len());
         for character in string.chars() {
@@ -343,16 +392,68 @@ extern fn do_command_by_selector(this: &Object, _sel: Sel, command: Sel) {
     }
 }
 
+fn get_characters(event: id, ignore_modifiers: bool) -> String {
+    unsafe {
+        let characters: id = if ignore_modifiers {
+            msg_send![event, charactersIgnoringModifiers]
+        } else {
+            msg_send![event, characters]
+        };
+
+        assert_ne!(characters, nil);
+        let slice = slice::from_raw_parts(
+            characters.UTF8String() as *const c_uchar,
+            characters.len(),
+        );
+
+        let string = str::from_utf8_unchecked(slice);
+
+        string.to_owned()
+    }
+}
+
+// Retrieves a layout-independent keycode given an event.
+fn retrieve_keycode(event: id) -> Option<events::VirtualKeyCode> {
+    #[inline]
+    fn get_code(ev: id, raw: bool) -> Option<events::VirtualKeyCode> {
+        let characters = get_characters(ev, raw);
+        characters.chars().next().map_or(None, |c| char_to_keycode(c))
+    }
+
+    // Cmd switches Roman letters for Dvorak-QWERTY layout, so we try modified characters first.
+    // If we don't get a match, then we fall back to unmodified characters.
+    let code = get_code(event, false)
+        .or_else(|| {
+            get_code(event, true)
+        });
+
+    // We've checked all layout related keys, so fall through to scancode.
+    // Reaching this code means that the key is layout-independent (e.g. Backspace, Return).
+    //
+    // We're additionally checking here for F21-F24 keys, since their keycode
+    // can vary, but we know that they are encoded
+    // in characters property.
+    code.or_else(|| {
+        let scancode = get_scancode(event);
+        scancode_to_keycode(scancode)
+            .or_else(|| {
+                check_function_keys(&get_characters(event, true))
+            })
+    })
+}
+
 extern fn key_down(this: &Object, _sel: Sel, event: id) {
     //println!("keyDown");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);
         let window_id = WindowId(get_window_id(state.window));
+        let characters = get_characters(event, false);
 
-        let keycode: c_ushort = msg_send![event, keyCode];
-        let virtual_keycode = to_virtual_key_code(keycode);
-        let scancode = keycode as u32;
+        state.raw_characters = Some(characters.clone());
+
+        let scancode = get_scancode(event) as u32;
+        let virtual_keycode = retrieve_keycode(event);
         let is_repeat = msg_send![event, isARepeat];
 
         let window_event = Event::WindowEvent {
@@ -368,25 +469,14 @@ extern fn key_down(this: &Object, _sel: Sel, event: id) {
             },
         };
 
-        state.raw_characters = {
-            let characters: id = msg_send![event, characters];
-            let slice = slice::from_raw_parts(
-                characters.UTF8String() as *const c_uchar,
-                characters.len(),
-            );
-            let string = str::from_utf8_unchecked(slice);
-            Some(string.to_owned())
-        };
-
         if let Some(shared) = state.shared.upgrade() {
             shared.pending_events
                 .lock()
                 .unwrap()
                 .push_back(window_event);
             // Emit `ReceivedCharacter` for key repeats
-            if is_repeat && state.last_insert.is_some() {
-                let last_insert = state.last_insert.as_ref().unwrap();
-                for character in last_insert.chars() {
+            if is_repeat && state.is_key_down{
+                for character in characters.chars() {
                     let window_event = Event::WindowEvent {
                         window_id,
                         event: WindowEvent::ReceivedCharacter(character),
@@ -400,7 +490,7 @@ extern fn key_down(this: &Object, _sel: Sel, event: id) {
                 // Some keys (and only *some*, with no known reason) don't trigger `insertText`, while others do...
                 // So, we don't give repeats the opportunity to trigger that, since otherwise our hack will cause some
                 // keys to generate twice as many characters.
-                let array: id = msg_send![class("NSArray"), arrayWithObject:event];
+                let array: id = msg_send![class!(NSArray), arrayWithObject:event];
                 let (): _ = msg_send![this, interpretKeyEvents:array];
             }
         }
@@ -413,11 +503,11 @@ extern fn key_up(this: &Object, _sel: Sel, event: id) {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);
 
-        state.last_insert = None;
+        state.is_key_down = false;
+
+        let scancode = get_scancode(event) as u32;
+        let virtual_keycode = retrieve_keycode(event);
 
-        let keycode: c_ushort = msg_send![event, keyCode];
-        let virtual_keycode = to_virtual_key_code(keycode);
-        let scancode = keycode as u32;
         let window_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.window)),
             event: WindowEvent::KeyboardInput {
@@ -566,3 +656,8 @@ extern fn right_mouse_dragged(this: &Object, _sel: Sel, event: id) {
 extern fn other_mouse_dragged(this: &Object, _sel: Sel, event: id) {
     mouse_motion(this, event);
 }
+
+// https://github.com/chromium/chromium/blob/a86a8a6bcfa438fa3ac2eba6f02b3ad1f8e0756f/ui/views/cocoa/bridged_content_view.mm#L816
+extern fn wants_key_down_for_event(_this: &Object, _se: Sel, _event: id) -> BOOL {
+    YES
+}

src/platform/macos/window.rs

@@ -1,20 +1,26 @@
+use raw_window_handle::{macos::MacOSHandle, RawWindowHandle};
 use std;
+use std::cell::{Cell, RefCell};
+use std::f64;
 use std::ops::Deref;
 use std::os::raw::c_void;
-use std::sync::Weak;
-use std::cell::{Cell, RefCell};
+use std::sync::{Mutex, Weak};
+use std::sync::atomic::{Ordering, AtomicBool};
 
-use cocoa;
 use cocoa::appkit::{
     self,
     CGFloat,
+    NSApp,
     NSApplication,
     NSColor,
+    NSRequestUserAttentionType,
     NSScreen,
     NSView,
     NSWindow,
     NSWindowButton,
     NSWindowStyleMask,
+    NSApplicationActivationPolicy,
+    NSApplicationPresentationOptions,
 };
 use cocoa::base::{id, nil};
 use cocoa::foundation::{NSAutoreleasePool, NSDictionary, NSPoint, NSRect, NSSize, NSString};
@@ -45,6 +51,13 @@ use window::MonitorId as RootMonitorId;
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct Id(pub usize);
 
+impl Id {
+    pub unsafe fn dummy() -> Self {
+        Id(0)
+    }
+}
+
+// TODO: It's possible for delegate methods to be called asynchronously, causing data races / `RefCell` panics.
 pub struct DelegateState {
     view: IdRef,
     window: IdRef,
@@ -52,7 +65,9 @@ pub struct DelegateState {
 
     win_attribs: RefCell<WindowAttributes>,
     standard_frame: Cell<Option<NSRect>>,
+    is_simple_fullscreen: Cell<bool>,
     save_style_mask: Cell<Option<NSWindowStyleMask>>,
+    save_presentation_opts: Cell<Option<NSApplicationPresentationOptions>>,
 
     // This is set when WindowBuilder::with_fullscreen was set,
     // see comments of `window_did_fail_to_enter_fullscreen`
@@ -89,22 +104,30 @@ impl DelegateState {
         }
     }
 
+    unsafe fn saved_style_mask(&self, resizable: bool) -> NSWindowStyleMask {
+        let base_mask = self.save_style_mask
+            .take()
+            .unwrap_or_else(|| self.window.styleMask());
+        if resizable {
+            base_mask | NSWindowStyleMask::NSResizableWindowMask
+        } else {
+            base_mask & !NSWindowStyleMask::NSResizableWindowMask
+        }
+    }
+
+    fn saved_standard_frame(&self) -> NSRect {
+        self.standard_frame.get().unwrap_or_else(|| NSRect::new(
+            NSPoint::new(50.0, 50.0),
+            NSSize::new(800.0, 600.0),
+        ))
+    }
+
     fn restore_state_from_fullscreen(&mut self) {
         let maximized = unsafe {
             let mut win_attribs = self.win_attribs.borrow_mut();
             win_attribs.fullscreen = None;
 
-            let mask = {
-                let base_mask = self.save_style_mask
-                    .take()
-                    .unwrap_or_else(|| self.window.styleMask());
-                if win_attribs.resizable {
-                    base_mask | NSWindowStyleMask::NSResizableWindowMask
-                } else {
-                    base_mask & !NSWindowStyleMask::NSResizableWindowMask
-                }
-            };
-
+            let mask = self.saved_style_mask(win_attribs.resizable);
             util::set_style_mask(*self.window, *self.view, mask);
 
             win_attribs.maximized
@@ -146,10 +169,7 @@ impl DelegateState {
                     let screen = NSScreen::mainScreen(nil);
                     NSScreen::visibleFrame(screen)
                 } else {
-                    self.standard_frame.get().unwrap_or(NSRect::new(
-                        NSPoint::new(50.0, 50.0),
-                        NSSize::new(800.0, 600.0),
-                    ))
+                    self.saved_standard_frame()
                 };
 
                 self.window.setFrame_display_(new_rect, 0);
@@ -311,7 +331,9 @@ impl WindowDelegate {
         }
 
         /// Invoked when the image is released
-        extern fn prepare_for_drag_operation(_: &Object, _: Sel, _: id) {}
+        extern fn prepare_for_drag_operation(_: &Object, _: Sel, _: id) -> BOOL {
+            YES
+        }
 
         /// Invoked after the released image has been removed from the screen
         extern fn perform_drag_operation(this: &Object, _: Sel, sender: id) -> BOOL {
@@ -421,7 +443,7 @@ impl WindowDelegate {
 
         INIT.call_once(|| unsafe {
             // Create new NSWindowDelegate
-            let superclass = Class::get("NSObject").unwrap();
+            let superclass = class!(NSObject);
             let mut decl = ClassDecl::new("WinitWindowDelegate", superclass).unwrap();
 
             // Add callback methods
@@ -446,7 +468,7 @@ impl WindowDelegate {
             decl.add_method(sel!(draggingEntered:),
                 dragging_entered as extern fn(&Object, Sel, id) -> BOOL);
             decl.add_method(sel!(prepareForDragOperation:),
-                prepare_for_drag_operation as extern fn(&Object, Sel, id));
+                prepare_for_drag_operation as extern fn(&Object, Sel, id) -> BOOL);
             decl.add_method(sel!(performDragOperation:),
                 perform_drag_operation as extern fn(&Object, Sel, id) -> BOOL);
             decl.add_method(sel!(concludeDragOperation:),
@@ -526,7 +548,8 @@ pub struct Window2 {
     pub window: IdRef,
     pub delegate: WindowDelegate,
     pub input_context: IdRef,
-    cursor_hidden: Cell<bool>,
+    cursor: Weak<Mutex<util::Cursor>>,
+    cursor_hidden: AtomicBool,
 }
 
 unsafe impl Send for Window2 {}
@@ -582,6 +605,86 @@ impl WindowExt for Window2 {
     fn get_nsview(&self) -> *mut c_void {
         *self.view as *mut c_void
     }
+
+    #[inline]
+    fn request_user_attention(&self, is_critical: bool) {
+        let request_type = if is_critical {
+            NSRequestUserAttentionType::NSCriticalRequest
+        } else {
+            NSRequestUserAttentionType::NSInformationalRequest
+        };
+
+        unsafe {
+            NSApp().requestUserAttention_(request_type);
+        }
+    }
+
+    #[inline]
+    fn get_simple_fullscreen(&self) -> bool {
+        self.delegate.state.is_simple_fullscreen.get()
+    }
+
+    #[inline]
+    fn set_simple_fullscreen(&self, fullscreen: bool) -> bool {
+        let state = &self.delegate.state;
+
+        unsafe {
+            let app = NSApp();
+            let win_attribs = state.win_attribs.borrow_mut();
+            let is_native_fullscreen = win_attribs.fullscreen.is_some();
+            let is_simple_fullscreen = state.is_simple_fullscreen.get();
+
+            // Do nothing if native fullscreen is active.
+            if is_native_fullscreen || (fullscreen && is_simple_fullscreen) || (!fullscreen && !is_simple_fullscreen) {
+                return false;
+            }
+
+            if fullscreen {
+                // Remember the original window's settings
+                state.standard_frame.set(Some(NSWindow::frame(*self.window)));
+                state.save_style_mask.set(Some(self.window.styleMask()));
+                state.save_presentation_opts.set(Some(app.presentationOptions_()));
+
+                // Tell our window's state that we're in fullscreen
+                state.is_simple_fullscreen.set(true);
+
+                // Simulate pre-Lion fullscreen by hiding the dock and menu bar
+                let presentation_options =
+                    NSApplicationPresentationOptions::NSApplicationPresentationAutoHideDock |
+                    NSApplicationPresentationOptions::NSApplicationPresentationAutoHideMenuBar;
+                app.setPresentationOptions_(presentation_options);
+
+                // Hide the titlebar
+                util::toggle_style_mask(*self.window, *self.view, NSWindowStyleMask::NSTitledWindowMask, false);
+
+                // Set the window frame to the screen frame size
+                let screen = self.window.screen();
+                let screen_frame = NSScreen::frame(screen);
+                NSWindow::setFrame_display_(*self.window, screen_frame, YES);
+
+                // Fullscreen windows can't be resized, minimized, or moved
+                util::toggle_style_mask(*self.window, *self.view, NSWindowStyleMask::NSMiniaturizableWindowMask, false);
+                util::toggle_style_mask(*self.window, *self.view, NSWindowStyleMask::NSResizableWindowMask, false);
+                NSWindow::setMovable_(*self.window, NO);
+
+                true
+            } else {
+                let saved_style_mask = state.saved_style_mask(win_attribs.resizable);
+                util::set_style_mask(*self.window, *self.view, saved_style_mask);
+                state.is_simple_fullscreen.set(false);
+
+                if let Some(presentation_opts) = state.save_presentation_opts.get() {
+                    app.setPresentationOptions_(presentation_opts);
+                }
+
+                let frame = state.saved_standard_frame();
+                NSWindow::setFrame_display_(*self.window, frame, YES);
+                NSWindow::setMovable_(*self.window, YES);
+
+                true
+            }
+        }
+    }
 }
 
 impl Window2 {
@@ -591,7 +694,7 @@ impl Window2 {
         pl_attribs: PlatformSpecificWindowBuilderAttributes,
     ) -> Result<Window2, CreationError> {
         unsafe {
-            if !msg_send![cocoa::base::class("NSThread"), isMainThread] {
+            if !msg_send![class!(NSThread), isMainThread] {
                 panic!("Windows can only be created on the main thread on macOS");
             }
         }
@@ -618,7 +721,7 @@ impl Window2 {
                 return Err(OsError(format!("Couldn't create NSWindow")));
             },
         };
-        let view = match Window2::create_view(*window, Weak::clone(&shared)) {
+        let (view, cursor) = match Window2::create_view(*window, Weak::clone(&shared)) {
             Some(view) => view,
             None => {
                 let _: () = unsafe { msg_send![autoreleasepool, drain] };
@@ -657,7 +760,9 @@ impl Window2 {
             shared,
             win_attribs: RefCell::new(win_attribs.clone()),
             standard_frame: Cell::new(None),
+            is_simple_fullscreen: Cell::new(false),
             save_style_mask: Cell::new(None),
+            save_presentation_opts: Cell::new(None),
             handle_with_fullscreen: win_attribs.fullscreen.is_some(),
             previous_position: None,
             previous_dpi_factor: dpi_factor,
@@ -674,6 +779,7 @@ impl Window2 {
             window: window,
             delegate: WindowDelegate::new(delegate_state),
             input_context,
+            cursor,
             cursor_hidden: Default::default(),
         };
 
@@ -716,7 +822,15 @@ impl Window2 {
             if app == nil {
                 None
             } else {
-                app.setActivationPolicy_(activation_policy.into());
+                let ns_activation_policy = match activation_policy {
+                    ActivationPolicy::Regular =>
+                        NSApplicationActivationPolicy::NSApplicationActivationPolicyRegular,
+                    ActivationPolicy::Accessory =>
+                        NSApplicationActivationPolicy::NSApplicationActivationPolicyAccessory,
+                    ActivationPolicy::Prohibited =>
+                        NSApplicationActivationPolicy::NSApplicationActivationPolicyProhibited,
+                };
+                app.setActivationPolicy_(ns_activation_policy);
                 app.finishLaunching();
                 Some(app)
             }
@@ -728,7 +842,7 @@ impl Window2 {
         static INIT: std::sync::Once = std::sync::ONCE_INIT;
 
         INIT.call_once(|| unsafe {
-            let window_superclass = Class::get("NSWindow").unwrap();
+            let window_superclass = class!(NSWindow);
             let mut decl = ClassDecl::new("WinitWindow", window_superclass).unwrap();
             decl.add_method(sel!(canBecomeMainWindow), yes as extern fn(&Object, Sel) -> BOOL);
             decl.add_method(sel!(canBecomeKeyWindow), yes as extern fn(&Object, Sel) -> BOOL);
@@ -844,14 +958,24 @@ impl Window2 {
         }
     }
 
-    fn create_view(window: id, shared: Weak<Shared>) -> Option<IdRef> {
+    fn create_view(window: id, shared: Weak<Shared>) -> Option<(IdRef, Weak<Mutex<util::Cursor>>)> {
         unsafe {
-            let view = new_view(window, shared);
+            let (view, cursor) = new_view(window, shared);
             view.non_nil().map(|view| {
                 view.setWantsBestResolutionOpenGLSurface_(YES);
+
+                // On Mojave, views automatically become layer-backed shortly after being added to
+                // a window. Changing the layer-backedness of a view breaks the association between
+                // the view and its associated OpenGL context. To work around this, on Mojave we
+                // explicitly make the view layer-backed up front so that AppKit doesn't do it
+                // itself and break the association with its context.
+                if f64::floor(appkit::NSAppKitVersionNumber) > appkit::NSAppKitVersionNumber10_12 {
+                    view.setWantsLayer(YES);
+                }
+
                 window.setContentView_(*view);
                 window.makeFirstResponder_(*view);
-                view
+                (view, cursor)
             })
         }
     }
@@ -958,40 +1082,14 @@ impl Window2 {
     }
 
     pub fn set_cursor(&self, cursor: MouseCursor) {
-        let cursor_name = match cursor {
-            MouseCursor::Arrow | MouseCursor::Default => "arrowCursor",
-            MouseCursor::Hand => "pointingHandCursor",
-            MouseCursor::Grabbing | MouseCursor::Grab => "closedHandCursor",
-            MouseCursor::Text => "IBeamCursor",
-            MouseCursor::VerticalText => "IBeamCursorForVerticalLayout",
-            MouseCursor::Copy => "dragCopyCursor",
-            MouseCursor::Alias => "dragLinkCursor",
-            MouseCursor::NotAllowed | MouseCursor::NoDrop => "operationNotAllowedCursor",
-            MouseCursor::ContextMenu => "contextualMenuCursor",
-            MouseCursor::Crosshair => "crosshairCursor",
-            MouseCursor::EResize => "resizeRightCursor",
-            MouseCursor::NResize => "resizeUpCursor",
-            MouseCursor::WResize => "resizeLeftCursor",
-            MouseCursor::SResize => "resizeDownCursor",
-            MouseCursor::EwResize | MouseCursor::ColResize => "resizeLeftRightCursor",
-            MouseCursor::NsResize | MouseCursor::RowResize => "resizeUpDownCursor",
-
-            // TODO: Find appropriate OSX cursors
-            MouseCursor::NeResize | MouseCursor::NwResize |
-            MouseCursor::SeResize | MouseCursor::SwResize |
-            MouseCursor::NwseResize | MouseCursor::NeswResize |
-
-            MouseCursor::Cell |
-            MouseCursor::Wait | MouseCursor::Progress | MouseCursor::Help |
-            MouseCursor::Move | MouseCursor::AllScroll | MouseCursor::ZoomIn |
-            MouseCursor::ZoomOut => "arrowCursor",
-        };
-        let sel = Sel::register(cursor_name);
-        let cls = Class::get("NSCursor").unwrap();
+        let cursor = util::Cursor::from(cursor);
+        if let Some(cursor_access) = self.cursor.upgrade() {
+            *cursor_access.lock().unwrap() = cursor;
+        }
         unsafe {
-            use objc::Message;
-            let cursor: id = cls.send_message(sel, ()).unwrap();
-            let _: () = msg_send![cursor, set];
+            let _: () = msg_send![*self.window,
+                invalidateCursorRectsForView:*self.view
+            ];
         }
     }
 
@@ -1004,16 +1102,16 @@ impl Window2 {
 
     #[inline]
     pub fn hide_cursor(&self, hide: bool) {
-        let cursor_class = Class::get("NSCursor").unwrap();
+        let cursor_class = class!(NSCursor);
         // macOS uses a "hide counter" like Windows does, so we avoid incrementing it more than once.
         // (otherwise, `hide_cursor(false)` would need to be called n times!)
-        if hide != self.cursor_hidden.get() {
+        if hide != self.cursor_hidden.load(Ordering::Acquire) {
             if hide {
                 let _: () = unsafe { msg_send![cursor_class, hide] };
             } else {
                 let _: () = unsafe { msg_send![cursor_class, unhide] };
             }
-            self.cursor_hidden.replace(hide);
+            self.cursor_hidden.store(hide, Ordering::Release);
         }
     }
 
@@ -1045,11 +1143,25 @@ impl Window2 {
         self.delegate.state.perform_maximized(maximized)
     }
 
+    #[inline]
+    pub fn get_fullscreen(&self) -> Option<RootMonitorId> {
+        let state = &self.delegate.state;
+        let win_attribs = state.win_attribs.borrow();
+
+        win_attribs.fullscreen.clone()
+    }
+
     #[inline]
     /// TODO: Right now set_fullscreen do not work on switching monitors
     /// in fullscreen mode
     pub fn set_fullscreen(&self, monitor: Option<RootMonitorId>) {
         let state = &self.delegate.state;
+
+        // Do nothing if simple fullscreen is active.
+        if state.is_simple_fullscreen.get() {
+            return
+        }
+
         let current = {
             let win_attribs = state.win_attribs.borrow_mut();
 
@@ -1155,6 +1267,16 @@ impl Window2 {
             self::get_current_monitor(*self.window)
         }
     }
+
+    #[inline]
+    pub fn raw_window_handle(&self) -> RawWindowHandle {
+        let handle = MacOSHandle {
+            ns_window: self.get_nswindow(),
+            ns_view: self.get_nsview(),
+            ..MacOSHandle::empty()
+        };
+        RawWindowHandle::MacOS(handle)
+    }
 }
 
 // Convert the `cocoa::base::id` associated with a window to a usize to use as a unique identifier

src/platform/mod.rs

@@ -3,7 +3,7 @@ pub use self::platform::*;
 #[cfg(target_os = "windows")]
 #[path="windows/mod.rs"]
 mod platform;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 #[path="linux/mod.rs"]
 mod platform;
 #[cfg(target_os = "macos")]
@@ -21,5 +21,6 @@ mod platform;
 
 #[cfg(all(not(target_os = "ios"), not(target_os = "windows"), not(target_os = "linux"),
   not(target_os = "macos"), not(target_os = "android"), not(target_os = "dragonfly"),
-  not(target_os = "freebsd"), not(target_os = "openbsd"), not(target_os = "emscripten")))]
+  not(target_os = "freebsd"), not(target_os = "netbsd"), not(target_os = "openbsd"),
+  not(target_os = "emscripten")))]
 compile_error!("The platform you're compiling for is not supported by winit");

src/platform/windows/dpi.rs

@@ -8,7 +8,6 @@ use winapi::shared::minwindef::{BOOL, UINT, FALSE};
 use winapi::shared::windef::{
     DPI_AWARENESS_CONTEXT,
     DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE,
-    HDC,
     HMONITOR,
     HWND,
 };
@@ -145,7 +144,11 @@ pub fn dpi_to_scale_factor(dpi: u32) -> f64 {
     dpi as f64 / BASE_DPI as f64
 }
 
-pub unsafe fn get_window_dpi(hwnd: HWND, hdc: HDC) -> u32 {
+pub unsafe fn get_hwnd_dpi(hwnd: HWND) -> u32 {
+    let hdc = winuser::GetDC(hwnd);
+    if hdc.is_null() {
+        panic!("[winit] `GetDC` returned null!");
+    }
     if let Some(GetDpiForWindow) = *GET_DPI_FOR_WINDOW {
         // We are on Windows 10 Anniversary Update (1607) or later.
         match GetDpiForWindow(hwnd) {
@@ -181,16 +184,6 @@ pub unsafe fn get_window_dpi(hwnd: HWND, hdc: HDC) -> u32 {
     }
 }
 
-// Use this when you have both the HWND and HDC on hand (i.e. window methods)
-pub fn get_window_scale_factor(hwnd: HWND, hdc: HDC) -> f64 {
-    dpi_to_scale_factor(unsafe { get_window_dpi(hwnd, hdc) })
-}
-
-// Use this when you only have the HWND (i.e. event handling)
 pub fn get_hwnd_scale_factor(hwnd: HWND) -> f64 {
-    let hdc = unsafe { winuser::GetDC(hwnd) };
-    if hdc.is_null() {
-        panic!("[winit] `GetDC` returned null!");
-    }
-    unsafe { get_window_scale_factor(hwnd, hdc) }
+    dpi_to_scale_factor(unsafe { get_hwnd_dpi(hwnd) })
 }

src/platform/windows/drop_handler.rs

@@ -0,0 +1,226 @@
+use std::ffi::OsString;
+use std::os::windows::ffi::OsStringExt;
+use std::path::PathBuf;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::{mem, ptr};
+
+use winapi::ctypes::c_void;
+use winapi::shared::guiddef::REFIID;
+use winapi::shared::minwindef::{DWORD, MAX_PATH, UINT, ULONG};
+use winapi::shared::windef::{HWND, POINTL};
+use winapi::shared::winerror::S_OK;
+use winapi::um::objidl::IDataObject;
+use winapi::um::oleidl::{DROPEFFECT_COPY, DROPEFFECT_NONE, IDropTarget, IDropTargetVtbl};
+use winapi::um::winnt::HRESULT;
+use winapi::um::{shellapi, unknwnbase};
+
+use platform::platform::events_loop::send_event;
+use platform::platform::WindowId;
+
+use {Event, WindowId as SuperWindowId};
+
+#[repr(C)]
+pub struct FileDropHandlerData {
+    pub interface: IDropTarget,
+    refcount: AtomicUsize,
+    window: HWND,
+    cursor_effect: DWORD,
+    hovered_is_valid: bool, // If the currently hovered item is not valid there must not be any `HoveredFileCancelled` emitted
+}
+
+pub struct FileDropHandler {
+    pub data: *mut FileDropHandlerData,
+}
+
+#[allow(non_snake_case)]
+impl FileDropHandler {
+    pub fn new(window: HWND) -> FileDropHandler {
+        let data = Box::new(FileDropHandlerData {
+            interface: IDropTarget {
+                lpVtbl: &DROP_TARGET_VTBL as *const IDropTargetVtbl,
+            },
+            refcount: AtomicUsize::new(1),
+            window,
+            cursor_effect: DROPEFFECT_NONE,
+            hovered_is_valid: false,
+        });
+        FileDropHandler {
+            data: Box::into_raw(data),
+        }
+    }
+
+    // Implement IUnknown
+    pub unsafe extern "system" fn QueryInterface(
+        _this: *mut unknwnbase::IUnknown,
+        _riid: REFIID,
+        _ppvObject: *mut *mut c_void,
+    ) -> HRESULT {
+        // This function doesn't appear to be required for an `IDropTarget`.
+        // An implementation would be nice however.
+        unimplemented!();
+    }
+
+    pub unsafe extern "system" fn AddRef(this: *mut unknwnbase::IUnknown) -> ULONG {
+        let drop_handler_data = Self::from_interface(this);
+        let count = drop_handler_data.refcount.fetch_add(1, Ordering::Release) + 1;
+        count as ULONG
+    }
+
+    pub unsafe extern "system" fn Release(this: *mut unknwnbase::IUnknown) -> ULONG {
+        let drop_handler = Self::from_interface(this);
+        let count = drop_handler.refcount.fetch_sub(1, Ordering::Release) - 1;
+        if count == 0 {
+            // Destroy the underlying data
+            Box::from_raw(drop_handler as *mut FileDropHandlerData);
+        }
+        count as ULONG
+    }
+
+    pub unsafe extern "system" fn DragEnter(
+        this: *mut IDropTarget,
+        pDataObj: *const IDataObject,
+        _grfKeyState: DWORD,
+        _pt: *const POINTL,
+        pdwEffect: *mut DWORD,
+    ) -> HRESULT {
+        use events::WindowEvent::HoveredFile;
+        let drop_handler = Self::from_interface(this);
+        let hdrop = Self::iterate_filenames(pDataObj, |filename| {
+            send_event(Event::WindowEvent {
+                window_id: SuperWindowId(WindowId(drop_handler.window)),
+                event: HoveredFile(filename),
+            });
+        });
+        drop_handler.hovered_is_valid = hdrop.is_some();
+        drop_handler.cursor_effect = if drop_handler.hovered_is_valid {
+            DROPEFFECT_COPY
+        } else {
+            DROPEFFECT_NONE
+        };
+        *pdwEffect = drop_handler.cursor_effect;
+
+        S_OK
+    }
+
+    pub unsafe extern "system" fn DragOver(
+        this: *mut IDropTarget,
+        _grfKeyState: DWORD,
+        _pt: *const POINTL,
+        pdwEffect: *mut DWORD,
+    ) -> HRESULT {
+        let drop_handler = Self::from_interface(this);
+        *pdwEffect = drop_handler.cursor_effect;
+
+        S_OK
+    }
+
+    pub unsafe extern "system" fn DragLeave(this: *mut IDropTarget) -> HRESULT {
+        use events::WindowEvent::HoveredFileCancelled;
+        let drop_handler = Self::from_interface(this);
+        if drop_handler.hovered_is_valid {
+            send_event(Event::WindowEvent {
+                window_id: SuperWindowId(WindowId(drop_handler.window)),
+                event: HoveredFileCancelled,
+            });
+        }
+
+        S_OK
+    }
+
+    pub unsafe extern "system" fn Drop(
+        this: *mut IDropTarget,
+        pDataObj: *const IDataObject,
+        _grfKeyState: DWORD,
+        _pt: *const POINTL,
+        _pdwEffect: *mut DWORD,
+    ) -> HRESULT {
+        use events::WindowEvent::DroppedFile;
+        let drop_handler = Self::from_interface(this);
+        let hdrop = Self::iterate_filenames(pDataObj, |filename| {
+            send_event(Event::WindowEvent {
+                window_id: SuperWindowId(WindowId(drop_handler.window)),
+                event: DroppedFile(filename),
+            });
+        });
+        if let Some(hdrop) = hdrop {
+            shellapi::DragFinish(hdrop);
+        }
+
+        S_OK
+    }
+
+    unsafe fn from_interface<'a, InterfaceT>(this: *mut InterfaceT) -> &'a mut FileDropHandlerData {
+        &mut *(this as *mut _)
+    }
+
+    unsafe fn iterate_filenames<F>(data_obj: *const IDataObject, callback: F) -> Option<shellapi::HDROP>
+    where
+        F: Fn(PathBuf),
+    {
+        use winapi::ctypes::wchar_t;
+        use winapi::shared::winerror::{SUCCEEDED, DV_E_FORMATETC};
+        use winapi::shared::wtypes::{CLIPFORMAT, DVASPECT_CONTENT};
+        use winapi::um::objidl::{FORMATETC, TYMED_HGLOBAL};
+        use winapi::um::shellapi::DragQueryFileW;
+        use winapi::um::winuser::CF_HDROP;
+
+        let mut drop_format = FORMATETC {
+            cfFormat: CF_HDROP as CLIPFORMAT,
+            ptd: ptr::null(),
+            dwAspect: DVASPECT_CONTENT,
+            lindex: -1,
+            tymed: TYMED_HGLOBAL,
+        };
+
+        let mut medium = mem::uninitialized();
+        let get_data_result = (*data_obj).GetData(&mut drop_format, &mut medium);
+        if SUCCEEDED(get_data_result) {
+            let hglobal = (*medium.u).hGlobal();
+            let hdrop = (*hglobal) as shellapi::HDROP;
+
+            // The second parameter (0xFFFFFFFF) instructs the function to return the item count
+            let item_count = DragQueryFileW(hdrop, 0xFFFFFFFF, ptr::null_mut(), 0);
+
+            let mut pathbuf: [wchar_t; MAX_PATH] = mem::uninitialized();
+
+            for i in 0..item_count {
+                let character_count =
+                    DragQueryFileW(hdrop, i, pathbuf.as_mut_ptr(), MAX_PATH as UINT) as usize;
+
+                if character_count > 0 {
+                    callback(OsString::from_wide(&pathbuf[0..character_count]).into());
+                }
+            }
+
+            return Some(hdrop);
+        } else if get_data_result == DV_E_FORMATETC {
+            // If the dropped item is not a file this error will occur.
+            // In this case it is OK to return without taking further action.
+            debug!("Error occured while processing dropped/hovered item: item is not a file.");
+            return None;
+        } else {
+            debug!("Unexpected error occured while processing dropped/hovered item.");
+            return None;
+        }
+    }
+}
+
+impl Drop for FileDropHandler {
+    fn drop(&mut self) {
+        unsafe {
+            FileDropHandler::Release(self.data as *mut unknwnbase::IUnknown);
+        }
+    }
+}
+
+static DROP_TARGET_VTBL: IDropTargetVtbl = IDropTargetVtbl {
+    parent: unknwnbase::IUnknownVtbl {
+        QueryInterface: FileDropHandler::QueryInterface,
+        AddRef: FileDropHandler::AddRef,
+        Release: FileDropHandler::Release,
+    },
+    DragEnter: FileDropHandler::DragEnter,
+    DragOver: FileDropHandler::DragOver,
+    DragLeave: FileDropHandler::DragLeave,
+    Drop: FileDropHandler::Drop,
+};

src/platform/windows/event.rs

@@ -1,33 +1,87 @@
-use std::char;
+use std::{char, ptr};
 use std::os::raw::c_int;
+use std::sync::atomic::{AtomicBool, AtomicPtr, Ordering};
 
 use events::VirtualKeyCode;
 use events::ModifiersState;
 
-use winapi::shared::minwindef::{WPARAM, LPARAM, UINT};
+use winapi::shared::minwindef::{WPARAM, LPARAM, UINT, HKL, HKL__};
 use winapi::um::winuser;
 
 use ScanCode;
 
+fn key_pressed(vkey: c_int) -> bool {
+    unsafe {
+        (winuser::GetKeyState(vkey) & (1 << 15)) == (1 << 15)
+    }
+}
+
 pub fn get_key_mods() -> ModifiersState {
     let mut mods = ModifiersState::default();
-    unsafe {
-        if winuser::GetKeyState(winuser::VK_SHIFT) & (1 << 15) == (1 << 15) {
-            mods.shift = true;
-        }
-        if winuser::GetKeyState(winuser::VK_CONTROL) & (1 << 15) == (1 << 15) {
-            mods.ctrl = true;
-        }
-        if winuser::GetKeyState(winuser::VK_MENU) & (1 << 15) == (1 << 15) {
-            mods.alt = true;
-        }
-        if (winuser::GetKeyState(winuser::VK_LWIN) | winuser::GetKeyState(winuser::VK_RWIN)) & (1 << 15) == (1 << 15) {
-            mods.logo = true;
-        }
-    }
+    let filter_out_altgr = layout_uses_altgr() && key_pressed(winuser::VK_RMENU);
+
+    mods.shift = key_pressed(winuser::VK_SHIFT);
+    mods.ctrl = key_pressed(winuser::VK_CONTROL) && !filter_out_altgr;
+    mods.alt = key_pressed(winuser::VK_MENU) && !filter_out_altgr;
+    mods.logo = key_pressed(winuser::VK_LWIN) || key_pressed(winuser::VK_RWIN);
     mods
 }
 
+unsafe fn get_char(keyboard_state: &[u8; 256], v_key: u32, hkl: HKL) -> Option<char> {
+    let mut unicode_bytes = [0u16; 5];
+    let len = winuser::ToUnicodeEx(v_key, 0, keyboard_state.as_ptr(), unicode_bytes.as_mut_ptr(), unicode_bytes.len() as _, 0, hkl);
+    if len >= 1 {
+        char::decode_utf16(unicode_bytes.into_iter().cloned()).next().and_then(|c| c.ok())
+    } else {
+        None
+    }
+}
+
+/// Figures out if the keyboard layout has an AltGr key instead of an Alt key.
+///
+/// Unfortunately, the Windows API doesn't give a way for us to conveniently figure that out. So,
+/// we use a technique blatantly stolen from [the Firefox source code][source]: iterate over every
+/// possible virtual key and compare the `char` output when AltGr is pressed vs when it isn't. If
+/// pressing AltGr outputs characters that are different from the standard characters, the layout
+/// uses AltGr. Otherwise, it doesn't.
+///
+/// [source]: https://github.com/mozilla/gecko-dev/blob/265e6721798a455604328ed5262f430cfcc37c2f/widget/windows/KeyboardLayout.cpp#L4356-L4416
+fn layout_uses_altgr() -> bool {
+    unsafe {
+        static ACTIVE_LAYOUT: AtomicPtr<HKL__> = AtomicPtr::new(ptr::null_mut());
+        static USES_ALTGR: AtomicBool = AtomicBool::new(false);
+
+        let hkl = winuser::GetKeyboardLayout(0);
+        let old_hkl = ACTIVE_LAYOUT.swap(hkl, Ordering::SeqCst);
+
+        if hkl == old_hkl {
+            return USES_ALTGR.load(Ordering::SeqCst);
+        }
+
+        let mut keyboard_state_altgr = [0u8; 256];
+        // AltGr is an alias for Ctrl+Alt for... some reason. Whatever it is, those are the keypresses
+        // we have to emulate to do an AltGr test.
+        keyboard_state_altgr[winuser::VK_MENU as usize] = 0x80;
+        keyboard_state_altgr[winuser::VK_CONTROL as usize] = 0x80;
+
+        let keyboard_state_empty = [0u8; 256];
+
+        for v_key in 0..=255 {
+            let key_noaltgr = get_char(&keyboard_state_empty, v_key, hkl);
+            let key_altgr = get_char(&keyboard_state_altgr, v_key, hkl);
+            if let (Some(noaltgr), Some(altgr)) = (key_noaltgr, key_altgr) {
+                if noaltgr != altgr {
+                    USES_ALTGR.store(true, Ordering::SeqCst);
+                    return true;
+                }
+            }
+        }
+
+        USES_ALTGR.store(false, Ordering::SeqCst);
+        false
+    }
+}
+
 pub fn vkey_to_winit_vkey(vkey: c_int) -> Option<VirtualKeyCode> {
     // VK_* codes are documented here https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731(v=vs.85).aspx
     match vkey {
@@ -148,7 +202,7 @@ pub fn vkey_to_winit_vkey(vkey: c_int) -> Option<VirtualKeyCode> {
         winuser::VK_F13 => Some(VirtualKeyCode::F13),
         winuser::VK_F14 => Some(VirtualKeyCode::F14),
         winuser::VK_F15 => Some(VirtualKeyCode::F15),
-        /*winuser::VK_F16 => Some(VirtualKeyCode::F16),
+        winuser::VK_F16 => Some(VirtualKeyCode::F16),
         winuser::VK_F17 => Some(VirtualKeyCode::F17),
         winuser::VK_F18 => Some(VirtualKeyCode::F18),
         winuser::VK_F19 => Some(VirtualKeyCode::F19),
@@ -156,7 +210,7 @@ pub fn vkey_to_winit_vkey(vkey: c_int) -> Option<VirtualKeyCode> {
         winuser::VK_F21 => Some(VirtualKeyCode::F21),
         winuser::VK_F22 => Some(VirtualKeyCode::F22),
         winuser::VK_F23 => Some(VirtualKeyCode::F23),
-        winuser::VK_F24 => Some(VirtualKeyCode::F24),*/
+        winuser::VK_F24 => Some(VirtualKeyCode::F24),
         winuser::VK_NUMLOCK => Some(VirtualKeyCode::Numlock),
         winuser::VK_SCROLL => Some(VirtualKeyCode::Scroll),
         winuser::VK_BROWSER_BACK => Some(VirtualKeyCode::NavigateBackward),

src/platform/windows/events_loop.rs

@@ -12,14 +12,14 @@
 //! The closure passed to the `execute_in_thread` method takes an `Inserter` that you can use to
 //! add a `WindowState` entry to a list of window to be used by the callback.
 
-use std::{mem, ptr, thread};
+use std::{mem, panic, ptr, thread};
+use std::any::Any;
 use std::cell::RefCell;
 use std::collections::HashMap;
-use std::ffi::OsString;
-use std::os::windows::ffi::OsStringExt;
 use std::os::windows::io::AsRawHandle;
-use std::sync::{Arc, Barrier, Condvar, mpsc, Mutex};
+use std::sync::{Arc, mpsc, Mutex};
 
+use backtrace::Backtrace;
 use winapi::ctypes::c_int;
 use winapi::shared::minwindef::{
     BOOL,
@@ -29,13 +29,14 @@ use winapi::shared::minwindef::{
     LOWORD,
     LPARAM,
     LRESULT,
-    MAX_PATH,
     UINT,
     WPARAM,
 };
 use winapi::shared::windef::{HWND, POINT, RECT};
 use winapi::shared::windowsx;
-use winapi::um::{winuser, shellapi, processthreadsapi};
+use winapi::shared::winerror::S_OK;
+use winapi::um::{libloaderapi, processthreadsapi, ole2, winuser};
+use winapi::um::oleidl::LPDROPTARGET;
 use winapi::um::winnt::{LONG, LPCSTR, SHORT};
 
 use {
@@ -50,64 +51,18 @@ use {
     WindowId as SuperWindowId,
 };
 use events::{DeviceEvent, Touch, TouchPhase};
-use platform::platform::{event, Cursor, WindowId, DEVICE_ID, wrap_device_id, util};
+use platform::platform::{event, WindowId, DEVICE_ID, wrap_device_id, util};
 use platform::platform::dpi::{
     become_dpi_aware,
     dpi_to_scale_factor,
     enable_non_client_dpi_scaling,
     get_hwnd_scale_factor,
 };
+use platform::platform::drop_handler::FileDropHandler;
 use platform::platform::event::{handle_extended_keys, process_key_params, vkey_to_winit_vkey};
 use platform::platform::raw_input::{get_raw_input_data, get_raw_mouse_button_state};
 use platform::platform::window::adjust_size;
-
-/// Contains saved window info for switching between fullscreen
-#[derive(Clone)]
-pub struct SavedWindowInfo {
-    /// Window style
-    pub style: LONG,
-    /// Window ex-style
-    pub ex_style: LONG,
-    /// Window position and size
-    pub rect: RECT,
-    // Since a window can be fullscreened to a different monitor, a DPI change can be triggered. This could result in
-    // the window being automitcally resized to smaller/larger than it was supposed to be restored to, so we thus must
-    // check if the post-fullscreen DPI matches the pre-fullscreen DPI.
-    pub is_fullscreen: bool,
-    pub dpi_factor: Option<f64>,
-}
-
-/// Contains information about states and the window that the callback is going to use.
-#[derive(Clone)]
-pub struct WindowState {
-    /// Cursor to set at the next `WM_SETCURSOR` event received.
-    pub cursor: Cursor,
-    pub cursor_grabbed: bool,
-    pub cursor_hidden: bool,
-    /// Used by `WM_GETMINMAXINFO`.
-    pub max_size: Option<PhysicalSize>,
-    pub min_size: Option<PhysicalSize>,
-    /// Will contain `true` if the mouse is hovering the window.
-    pub mouse_in_window: bool,
-    /// Saved window info for fullscreen restored
-    pub saved_window_info: Option<SavedWindowInfo>,
-    // This is different from the value in `SavedWindowInfo`! That one represents the DPI saved upon entering
-    // fullscreen. This will always be the most recent DPI for the window.
-    pub dpi_factor: f64,
-}
-
-impl WindowState {
-    pub fn update_min_max(&mut self, old_dpi_factor: f64, new_dpi_factor: f64) {
-        let scale_factor = new_dpi_factor / old_dpi_factor;
-        let dpi_adjuster = |mut physical_size: PhysicalSize| -> PhysicalSize {
-            physical_size.width *= scale_factor;
-            physical_size.height *= scale_factor;
-            physical_size
-        };
-        self.max_size = self.max_size.map(&dpi_adjuster);
-        self.min_size = self.min_size.map(&dpi_adjuster);
-    }
-}
+use platform::platform::window_state::{CursorFlags, WindowFlags, WindowState};
 
 /// Dummy object that allows inserting a window's state.
 // We store a pointer in order to !impl Send and Sync.
@@ -126,14 +81,18 @@ impl Inserter {
 }
 
 pub struct EventsLoop {
+    thread_msg_target: HWND,
     // Id of the background thread from the Win32 API.
     thread_id: DWORD,
     // Receiver for the events. The sender is in the background thread.
-    receiver: mpsc::Receiver<Event>,
-    // Variable that contains the block state of the win32 event loop thread during a WM_SIZE event.
-    // The mutex's value is `true` when it's blocked, and should be set to false when it's done
-    // blocking. That's done by the parent thread when it receives a Resized event.
-    win32_block_loop: Arc<(Mutex<bool>, Condvar)>,
+    receiver: mpsc::Receiver<EventsLoopEvent>,
+    // Sender instance that's paired with the receiver. Used to construct an `EventsLoopProxy`.
+    sender: mpsc::Sender<EventsLoopEvent>,
+}
+
+enum EventsLoopEvent {
+    WinitEvent(Event),
+    Panic(PanicError),
 }
 
 impl EventsLoop {
@@ -142,25 +101,33 @@ impl EventsLoop {
     }
 
     pub fn with_dpi_awareness(dpi_aware: bool) -> EventsLoop {
+        struct InitData {
+            thread_msg_target: HWND,
+        }
+        unsafe impl Send for InitData {}
+
         become_dpi_aware(dpi_aware);
 
         // The main events transfer channel.
         let (tx, rx) = mpsc::channel();
-        let win32_block_loop = Arc::new((Mutex::new(false), Condvar::new()));
-        let win32_block_loop_child = win32_block_loop.clone();
 
-        // Local barrier in order to block the `new()` function until the background thread has
-        // an events queue.
-        let barrier = Arc::new(Barrier::new(2));
-        let barrier_clone = barrier.clone();
+        // Channel to send initialization data created on the event loop thread back to the main
+        // thread.
+        let (init_tx, init_rx) = mpsc::sync_channel(0);
 
+        let thread_sender = tx.clone();
+        let panic_sender = tx.clone();
         let thread = thread::spawn(move || {
+            let tx = thread_sender;
+            let thread_msg_target = thread_event_target_window();
+
             CONTEXT_STASH.with(|context_stash| {
                 *context_stash.borrow_mut() = Some(ThreadLocalData {
                     sender: tx,
                     windows: HashMap::with_capacity(4),
-                    win32_block_loop: win32_block_loop_child,
-                    mouse_buttons_down: 0
+                    file_drop_handlers: HashMap::with_capacity(4),
+                    mouse_buttons_down: 0,
+                    panic_error: None,
                 });
             });
 
@@ -171,38 +138,37 @@ impl EventsLoop {
                 winuser::IsGUIThread(1);
                 // Then only we unblock the `new()` function. We are sure that we don't call
                 // `PostThreadMessageA()` before `new()` returns.
-                barrier_clone.wait();
-                drop(barrier_clone);
+                init_tx.send(InitData{ thread_msg_target }).ok();
+                drop(init_tx);
 
                 let mut msg = mem::uninitialized();
 
                 loop {
                     if winuser::GetMessageW(&mut msg, ptr::null_mut(), 0, 0) == 0 {
+                        // If a panic occurred in the child callback, forward the panic information
+                        // to the parent thread.
+                        let panic_payload_opt = CONTEXT_STASH.with(|stash|
+                            stash.borrow_mut().as_mut()
+                                 .and_then(|s| s.panic_error.take())
+                        );
+                        if let Some(panic_payload) = panic_payload_opt {
+                            panic_sender.send(EventsLoopEvent::Panic(panic_payload)).unwrap();
+                        };
+
                         // Only happens if the message is `WM_QUIT`.
                         debug_assert_eq!(msg.message, winuser::WM_QUIT);
                         break;
                     }
 
-                    match msg.message {
-                        x if x == *EXEC_MSG_ID => {
-                            let mut function: Box<Box<FnMut(Inserter)>> = Box::from_raw(msg.wParam as usize as *mut _);
-                            function(Inserter(ptr::null_mut()));
-                        },
-                        x if x == *WAKEUP_MSG_ID => {
-                            send_event(Event::Awakened);
-                        },
-                        _ => {
-                            // Calls `callback` below.
-                            winuser::TranslateMessage(&msg);
-                            winuser::DispatchMessageW(&msg);
-                        }
-                    }
+                    // Calls `callback` below.
+                    winuser::TranslateMessage(&msg);
+                    winuser::DispatchMessageW(&msg);
                 }
             }
         });
 
         // Blocks this function until the background thread has an events loop. See other comments.
-        barrier.wait();
+        let InitData { thread_msg_target } = init_rx.recv().unwrap();
 
         let thread_id = unsafe {
             let handle = mem::transmute(thread.as_raw_handle());
@@ -210,9 +176,10 @@ impl EventsLoop {
         };
 
         EventsLoop {
+            thread_msg_target,
             thread_id,
             receiver: rx,
-            win32_block_loop,
+            sender: tx,
         }
     }
 
@@ -221,21 +188,15 @@ impl EventsLoop {
     {
         loop {
             let event = match self.receiver.try_recv() {
-                Ok(e) => e,
-                Err(_) => return
-            };
-            let is_resize = match event {
-                Event::WindowEvent{ event: WindowEvent::Resized(..), .. } => true,
-                _ => false
+                Ok(EventsLoopEvent::WinitEvent(e)) => e,
+                Ok(EventsLoopEvent::Panic(panic)) => {
+                    eprintln!("resuming child thread unwind at: {:?}", Backtrace::new());
+                    panic::resume_unwind(panic)
+                },
+                Err(_) => break,
             };
 
             callback(event);
-            if is_resize {
-                let (ref mutex, ref cvar) = *self.win32_block_loop;
-                let mut block_thread = mutex.lock().unwrap();
-                *block_thread = false;
-                cvar.notify_all();
-            }
         }
     }
 
@@ -244,21 +205,15 @@ impl EventsLoop {
     {
         loop {
             let event = match self.receiver.recv() {
-                Ok(e) => e,
-                Err(_) => return
-            };
-            let is_resize = match event {
-                Event::WindowEvent{ event: WindowEvent::Resized(..), .. } => true,
-                _ => false
+                Ok(EventsLoopEvent::WinitEvent(e)) => e,
+                Ok(EventsLoopEvent::Panic(panic)) => {
+                    eprintln!("resuming child thread unwind at: {:?}", Backtrace::new());
+                    panic::resume_unwind(panic)
+                },
+                Err(_) => break,
             };
 
             let flow = callback(event);
-            if is_resize {
-                let (ref mutex, ref cvar) = *self.win32_block_loop;
-                let mut block_thread = mutex.lock().unwrap();
-                *block_thread = false;
-                cvar.notify_all();
-            }
             match flow {
                 ControlFlow::Continue => continue,
                 ControlFlow::Break => break,
@@ -269,6 +224,8 @@ impl EventsLoop {
     pub fn create_proxy(&self) -> EventsLoopProxy {
         EventsLoopProxy {
             thread_id: self.thread_id,
+            thread_msg_target: self.thread_msg_target,
+            sender: self.sender.clone(),
         }
     }
 
@@ -298,24 +255,16 @@ impl Drop for EventsLoop {
 #[derive(Clone)]
 pub struct EventsLoopProxy {
     thread_id: DWORD,
+    thread_msg_target: HWND,
+    sender: mpsc::Sender<EventsLoopEvent>,
 }
 
+unsafe impl Send for EventsLoopProxy {}
+unsafe impl Sync for EventsLoopProxy {}
+
 impl EventsLoopProxy {
     pub fn wakeup(&self) -> Result<(), EventsLoopClosed> {
-        unsafe {
-            if winuser::PostThreadMessageA(self.thread_id, *WAKEUP_MSG_ID, 0, 0) != 0 {
-                Ok(())
-            } else {
-                // https://msdn.microsoft.com/fr-fr/library/windows/desktop/ms644946(v=vs.85).aspx
-                // > If the function fails, the return value is zero. To get extended error
-                // > information, call GetLastError. GetLastError returns ERROR_INVALID_THREAD_ID
-                // > if idThread is not a valid thread identifier, or if the thread specified by
-                // > idThread does not have a message queue. GetLastError returns
-                // > ERROR_NOT_ENOUGH_QUOTA when the message limit is hit.
-                // TODO: handle ERROR_NOT_ENOUGH_QUOTA
-                Err(EventsLoopClosed)
-            }
-        }
+        self.sender.send(EventsLoopEvent::WinitEvent(Event::Awakened)).map_err(|_| EventsLoopClosed)
     }
 
     /// Executes a function in the background thread.
@@ -326,38 +275,40 @@ impl EventsLoopProxy {
     ///
     /// The `Inserted` can be used to inject a `WindowState` for the callback to use. The state is
     /// removed automatically if the callback receives a `WM_CLOSE` message for the window.
-    pub fn execute_in_thread<F>(&self, function: F)
+    ///
+    /// Note that if you are using this to change some property of a window and updating
+    /// `WindowState` then you should call this within the lock of `WindowState`. Otherwise the
+    /// events may be sent to the other thread in different order to the one in which you set
+    /// `WindowState`, leaving them out of sync.
+    pub fn execute_in_thread<F>(&self, mut function: F)
     where
         F: FnMut(Inserter) + Send + 'static,
     {
-        // We are using double-boxing here because it make casting back much easier
-        let double_box = Box::new(Box::new(function) as Box<FnMut(_)>);
-        let raw = Box::into_raw(double_box);
+        if unsafe{ processthreadsapi::GetCurrentThreadId() } == self.thread_id {
+            function(Inserter(ptr::null_mut()));
+        } else {
+            // We are using double-boxing here because it make casting back much easier
+            let double_box: ThreadExecFn = Box::new(Box::new(function) as Box<FnMut(_)>);
+            let raw = Box::into_raw(double_box);
 
-        let res = unsafe {
-            winuser::PostThreadMessageA(
-                self.thread_id,
-                *EXEC_MSG_ID,
-                raw as *mut () as usize as WPARAM,
-                0,
-            )
-        };
-        // PostThreadMessage can only fail if the thread ID is invalid (which shouldn't happen as
-        // the events loop is still alive) or if the queue is full.
-        assert!(res != 0, "PostThreadMessage failed; is the messages queue full?");
+            let res = unsafe {
+                winuser::PostMessageW(
+                    self.thread_msg_target,
+                    *EXEC_MSG_ID,
+                    raw as *mut () as usize as WPARAM,
+                    0,
+                )
+            };
+            assert!(res != 0, "PostMessage failed; is the messages queue full?");
+        }
     }
 }
 
+type ThreadExecFn = Box<Box<FnMut(Inserter)>>;
+
 lazy_static! {
-    // Message sent by the `EventsLoopProxy` when we want to wake up the thread.
-    // WPARAM and LPARAM are unused.
-    static ref WAKEUP_MSG_ID: u32 = {
-        unsafe {
-            winuser::RegisterWindowMessageA("Winit::WakeupMsg\0".as_ptr() as LPCSTR)
-        }
-    };
     // Message sent when we want to execute a closure in the thread.
-    // WPARAM contains a Box<Box<FnMut()>> that must be retreived with `Box::from_raw`,
+    // WPARAM contains a Box<Box<FnMut()>> that must be retrieved with `Box::from_raw`,
     // and LPARAM is unused.
     static ref EXEC_MSG_ID: u32 = {
         unsafe {
@@ -378,51 +329,141 @@ lazy_static! {
             winuser::RegisterWindowMessageA("Winit::InitialDpiMsg\0".as_ptr() as LPCSTR)
         }
     };
+    // WPARAM is a bool specifying the `WindowFlags::MARKER_RETAIN_STATE_ON_SIZE` flag. See the
+    // documentation in the `window_state` module for more information.
+    pub static ref SET_RETAIN_STATE_ON_SIZE_MSG_ID: u32 = unsafe {
+        winuser::RegisterWindowMessageA("Winit::SetRetainMaximized\0".as_ptr() as LPCSTR)
+    };
+    static ref THREAD_EVENT_TARGET_WINDOW_CLASS: Vec<u16> = unsafe {
+        use std::ffi::OsStr;
+        use std::os::windows::ffi::OsStrExt;
+
+        let class_name: Vec<_> = OsStr::new("Winit Thread Event Target")
+            .encode_wide()
+            .chain(Some(0).into_iter())
+            .collect();
+
+        let class = winuser::WNDCLASSEXW {
+            cbSize: mem::size_of::<winuser::WNDCLASSEXW>() as UINT,
+            style: 0,
+            lpfnWndProc: Some(thread_event_target_callback),
+            cbClsExtra: 0,
+            cbWndExtra: 0,
+            hInstance: libloaderapi::GetModuleHandleW(ptr::null()),
+            hIcon: ptr::null_mut(),
+            hCursor: ptr::null_mut(), // must be null in order for cursor state to work properly
+            hbrBackground: ptr::null_mut(),
+            lpszMenuName: ptr::null(),
+            lpszClassName: class_name.as_ptr(),
+            hIconSm: ptr::null_mut(),
+        };
+
+        winuser::RegisterClassExW(&class);
+
+        class_name
+    };
+}
+
+fn thread_event_target_window() -> HWND {
+    unsafe {
+        let window = winuser::CreateWindowExW(
+            winuser::WS_EX_NOACTIVATE | winuser::WS_EX_TRANSPARENT | winuser::WS_EX_LAYERED,
+            THREAD_EVENT_TARGET_WINDOW_CLASS.as_ptr(),
+            ptr::null_mut(),
+            0,
+            0, 0,
+            0, 0,
+            ptr::null_mut(),
+            ptr::null_mut(),
+            libloaderapi::GetModuleHandleW(ptr::null()),
+            ptr::null_mut(),
+        );
+        winuser::SetWindowLongPtrW(
+            window,
+            winuser::GWL_STYLE,
+            (winuser::WS_VISIBLE | winuser::WS_POPUP) as _
+        );
+
+        window
+    }
 }
 
 // There's no parameters passed to the callback function, so it needs to get its context stashed
 // in a thread-local variable.
 thread_local!(static CONTEXT_STASH: RefCell<Option<ThreadLocalData>> = RefCell::new(None));
 struct ThreadLocalData {
-    sender: mpsc::Sender<Event>,
+    sender: mpsc::Sender<EventsLoopEvent>,
     windows: HashMap<HWND, Arc<Mutex<WindowState>>>,
-    win32_block_loop: Arc<(Mutex<bool>, Condvar)>,
-    mouse_buttons_down: u32
+    file_drop_handlers: HashMap<HWND, FileDropHandler>, // Each window has its own drop handler.
+    mouse_buttons_down: u32,
+    panic_error: Option<PanicError>,
 }
+type PanicError = Box<Any + Send + 'static>;
 
 // Utility function that dispatches an event on the current thread.
-fn send_event(event: Event) {
+pub fn send_event(event: Event) {
     CONTEXT_STASH.with(|context_stash| {
         let context_stash = context_stash.borrow();
 
-        let _ = context_stash.as_ref().unwrap().sender.send(event);   // Ignoring if closed
+        let _ = context_stash.as_ref().unwrap().sender.send(EventsLoopEvent::WinitEvent(event));   // Ignoring if closed
     });
 }
 
 /// Capture mouse input, allowing `window` to receive mouse events when the cursor is outside of
 /// the window.
 unsafe fn capture_mouse(window: HWND) {
-    CONTEXT_STASH.with(|context_stash| {
+    let set_capture = CONTEXT_STASH.with(|context_stash| {
         let mut context_stash = context_stash.borrow_mut();
         if let Some(context_stash) = context_stash.as_mut() {
             context_stash.mouse_buttons_down += 1;
-            winuser::SetCapture(window);
+            true
+        } else {
+            false
         }
     });
+    if set_capture {
+        winuser::SetCapture(window);
+    }
 }
 
 /// Release mouse input, stopping windows on this thread from receiving mouse input when the cursor
 /// is outside the window.
 unsafe fn release_mouse() {
-    CONTEXT_STASH.with(|context_stash| {
+    let release_capture = CONTEXT_STASH.with(|context_stash| {
         let mut context_stash = context_stash.borrow_mut();
         if let Some(context_stash) = context_stash.as_mut() {
             context_stash.mouse_buttons_down = context_stash.mouse_buttons_down.saturating_sub(1);
             if context_stash.mouse_buttons_down == 0 {
-                winuser::ReleaseCapture();
+                return true;
             }
         }
+        false
     });
+    if release_capture {
+        winuser::ReleaseCapture();
+    }
+}
+
+pub unsafe fn run_catch_panic<F, R>(error: R, f: F) -> R
+    where F: panic::UnwindSafe + FnOnce() -> R
+{
+    // If a panic has been triggered, cancel all future operations in the function.
+    if CONTEXT_STASH.with(|stash| stash.borrow().as_ref().map(|s| s.panic_error.is_some()).unwrap_or(false)) {
+        return error;
+    }
+
+    let callback_result = panic::catch_unwind(f);
+    match callback_result {
+        Ok(lresult) => lresult,
+        Err(err) => CONTEXT_STASH.with(|context_stash| {
+            let mut context_stash = context_stash.borrow_mut();
+            if let Some(context_stash) = context_stash.as_mut() {
+                context_stash.panic_error = Some(err);
+                winuser::PostQuitMessage(-1);
+            }
+            error
+        })
+    }
 }
 
 /// Any window whose callback is configured to this function will have its events propagated
@@ -437,8 +478,43 @@ pub unsafe extern "system" fn callback(
     msg: UINT,
     wparam: WPARAM,
     lparam: LPARAM,
+) -> LRESULT {
+    // Unwinding into foreign code is undefined behavior. So we catch any panics that occur in our
+    // code, and if a panic happens we cancel any future operations.
+    run_catch_panic(-1, || callback_inner(window, msg, wparam, lparam))
+}
+
+unsafe fn callback_inner(
+    window: HWND,
+    msg: UINT,
+    wparam: WPARAM,
+    lparam: LPARAM,
 ) -> LRESULT {
     match msg {
+        winuser::WM_CREATE => {
+            use winapi::shared::winerror::{OLE_E_WRONGCOMPOBJ, RPC_E_CHANGED_MODE};
+            let ole_init_result = ole2::OleInitialize(ptr::null_mut());
+            // It is ok if the initialize result is `S_FALSE` because it might happen that
+            // multiple windows are created on the same thread.
+            if ole_init_result == OLE_E_WRONGCOMPOBJ {
+                panic!("OleInitialize failed! Result was: `OLE_E_WRONGCOMPOBJ`");
+            } else if ole_init_result == RPC_E_CHANGED_MODE {
+                panic!("OleInitialize failed! Result was: `RPC_E_CHANGED_MODE`");
+            }
+
+            CONTEXT_STASH.with(|context_stash| {
+                let mut context_stash = context_stash.borrow_mut();
+
+                let drop_handlers = &mut context_stash.as_mut().unwrap().file_drop_handlers;
+                let new_handler = FileDropHandler::new(window);
+                let handler_interface_ptr = &mut (*new_handler.data).interface as LPDROPTARGET;
+                drop_handlers.insert(window, new_handler);
+
+                assert_eq!(ole2::RegisterDragDrop(window, handler_interface_ptr), S_OK);
+            });
+            0
+        },
+
         winuser::WM_NCCREATE => {
             enable_non_client_dpi_scaling(window);
             winuser::DefWindowProcW(window, msg, wparam, lparam)
@@ -457,7 +533,10 @@ pub unsafe extern "system" fn callback(
             use events::WindowEvent::Destroyed;
             CONTEXT_STASH.with(|context_stash| {
                 let mut context_stash = context_stash.borrow_mut();
-                context_stash.as_mut().unwrap().windows.remove(&window);
+                ole2::RevokeDragDrop(window);
+                let context_stash_mut = context_stash.as_mut().unwrap();
+                context_stash_mut.file_drop_handlers.remove(&window);
+                context_stash_mut.windows.remove(&window);
             });
             send_event(Event::WindowEvent {
                 window_id: SuperWindowId(WindowId(window)),
@@ -501,37 +580,30 @@ pub unsafe extern "system" fn callback(
             let w = LOWORD(lparam as DWORD) as u32;
             let h = HIWORD(lparam as DWORD) as u32;
 
+            let dpi_factor = get_hwnd_scale_factor(window);
+            let logical_size = LogicalSize::from_physical((w, h), dpi_factor);
+            let event = Event::WindowEvent {
+                window_id: SuperWindowId(WindowId(window)),
+                event: Resized(logical_size),
+            };
+
             // Wait for the parent thread to process the resize event before returning from the
             // callback.
             CONTEXT_STASH.with(|context_stash| {
                 let mut context_stash = context_stash.borrow_mut();
                 let cstash = context_stash.as_mut().unwrap();
 
-                let dpi_factor = get_hwnd_scale_factor(window);
-                let logical_size = LogicalSize::from_physical((w, h), dpi_factor);
-                let event = Event::WindowEvent {
-                    window_id: SuperWindowId(WindowId(window)),
-                    event: Resized(logical_size),
-                };
+                if let Some(w) = cstash.windows.get_mut(&window) {
+                    let mut w = w.lock().unwrap();
 
-                // If this window has been inserted into the window map, the resize event happened
-                // during the event loop. If it hasn't, the event happened on window creation and
-                // should be ignored.
-                if cstash.windows.get(&window).is_some() {
-                    let (ref mutex, ref cvar) = *cstash.win32_block_loop;
-                    let mut block_thread = mutex.lock().unwrap();
-                    *block_thread = true;
-
-                    // The event needs to be sent after the lock to ensure that `notify_all` is
-                    // called after `wait`.
-                    cstash.sender.send(event).ok();
-
-                    while *block_thread {
-                        block_thread = cvar.wait(block_thread).unwrap();
+                    // See WindowFlags::MARKER_RETAIN_STATE_ON_SIZE docs for info on why this `if` check exists.
+                    if !w.window_flags().contains(WindowFlags::MARKER_RETAIN_STATE_ON_SIZE) {
+                        let maximized = wparam == winuser::SIZE_MAXIMIZED;
+                        w.set_window_flags_in_place(|f| f.set(WindowFlags::MAXIMIZED, maximized));
                     }
-                } else {
-                    cstash.sender.send(event).ok();
                 }
+
+                cstash.sender.send(EventsLoopEvent::WinitEvent(event)).ok();
             });
             0
         },
@@ -557,22 +629,26 @@ pub unsafe extern "system" fn callback(
 
         winuser::WM_MOUSEMOVE => {
             use events::WindowEvent::{CursorEntered, CursorMoved};
-            let mouse_outside_window = CONTEXT_STASH.with(|context_stash| {
+            let x = windowsx::GET_X_LPARAM(lparam);
+            let y = windowsx::GET_Y_LPARAM(lparam);
+
+            let mouse_was_outside_window = CONTEXT_STASH.with(|context_stash| {
                 let mut context_stash = context_stash.borrow_mut();
                 if let Some(context_stash) = context_stash.as_mut() {
                     if let Some(w) = context_stash.windows.get_mut(&window) {
                         let mut w = w.lock().unwrap();
-                        if !w.mouse_in_window {
-                            w.mouse_in_window = true;
-                            return true;
-                        }
+
+                        let was_outside_window = !w.mouse.cursor_flags().contains(CursorFlags::IN_WINDOW);
+                        w.mouse.set_cursor_flags(window, |f| f.set(CursorFlags::IN_WINDOW, true)).ok();
+                        return was_outside_window;
                     }
                 }
 
                 false
             });
 
-            if mouse_outside_window {
+
+            if mouse_was_outside_window {
                 send_event(Event::WindowEvent {
                     window_id: SuperWindowId(WindowId(window)),
                     event: CursorEntered { device_id: DEVICE_ID },
@@ -587,10 +663,8 @@ pub unsafe extern "system" fn callback(
                 });
             }
 
-            let x = windowsx::GET_X_LPARAM(lparam) as f64;
-            let y = windowsx::GET_Y_LPARAM(lparam) as f64;
             let dpi_factor = get_hwnd_scale_factor(window);
-            let position = LogicalPosition::from_physical((x, y), dpi_factor);
+            let position = LogicalPosition::from_physical((x as f64, y as f64), dpi_factor);
 
             send_event(Event::WindowEvent {
                 window_id: SuperWindowId(WindowId(window)),
@@ -602,27 +676,21 @@ pub unsafe extern "system" fn callback(
 
         winuser::WM_MOUSELEAVE => {
             use events::WindowEvent::CursorLeft;
-            let mouse_in_window = CONTEXT_STASH.with(|context_stash| {
+
+            CONTEXT_STASH.with(|context_stash| {
                 let mut context_stash = context_stash.borrow_mut();
                 if let Some(context_stash) = context_stash.as_mut() {
                     if let Some(w) = context_stash.windows.get_mut(&window) {
                         let mut w = w.lock().unwrap();
-                        if w.mouse_in_window {
-                            w.mouse_in_window = false;
-                            return true;
-                        }
+                        w.mouse.set_cursor_flags(window, |f| f.set(CursorFlags::IN_WINDOW, false)).ok();
                     }
                 }
-
-                false
             });
 
-            if mouse_in_window {
-                send_event(Event::WindowEvent {
-                    window_id: SuperWindowId(WindowId(window)),
-                    event: CursorLeft { device_id: DEVICE_ID }
-                });
-            }
+            send_event(Event::WindowEvent {
+                window_id: SuperWindowId(WindowId(window)),
+                event: CursorLeft { device_id: DEVICE_ID }
+            });
 
             0
         },
@@ -643,6 +711,22 @@ pub unsafe extern "system" fn callback(
             0
         },
 
+        winuser::WM_MOUSEHWHEEL => {
+            use events::MouseScrollDelta::LineDelta;
+            use events::TouchPhase;
+
+            let value = (wparam >> 16) as i16;
+            let value = value as i32;
+            let value = value as f32 / winuser::WHEEL_DELTA as f32;
+
+            send_event(Event::WindowEvent {
+                window_id: SuperWindowId(WindowId(window)),
+                event: WindowEvent::MouseWheel { device_id: DEVICE_ID, delta: LineDelta(value, 0.0), phase: TouchPhase::Moved, modifiers: event::get_key_mods() },
+            });
+
+            0
+        },
+
         winuser::WM_KEYDOWN | winuser::WM_SYSKEYDOWN => {
             use events::ElementState::Pressed;
             use events::VirtualKeyCode;
@@ -968,22 +1052,12 @@ pub unsafe extern "system" fn callback(
         }
 
         winuser::WM_SETFOCUS => {
-            use events::WindowEvent::{Focused, CursorMoved};
+            use events::WindowEvent::Focused;
             send_event(Event::WindowEvent {
                 window_id: SuperWindowId(WindowId(window)),
                 event: Focused(true)
             });
 
-            let x = windowsx::GET_X_LPARAM(lparam) as f64;
-            let y = windowsx::GET_Y_LPARAM(lparam) as f64;
-            let dpi_factor = get_hwnd_scale_factor(window);
-            let position = LogicalPosition::from_physical((x, y), dpi_factor);
-
-            send_event(Event::WindowEvent {
-                window_id: SuperWindowId(WindowId(window)),
-                event: CursorMoved { device_id: DEVICE_ID, position, modifiers: event::get_key_mods() },
-            });
-
             0
         },
 
@@ -997,53 +1071,36 @@ pub unsafe extern "system" fn callback(
         },
 
         winuser::WM_SETCURSOR => {
-            let call_def_window_proc = CONTEXT_STASH.with(|context_stash| {
+            let set_cursor_to = CONTEXT_STASH.with(|context_stash| {
                 context_stash
                     .borrow()
                     .as_ref()
                     .and_then(|cstash| cstash.windows.get(&window))
-                    .map(|window_state_mutex| {
+                    .and_then(|window_state_mutex| {
                         let window_state = window_state_mutex.lock().unwrap();
-                        if window_state.mouse_in_window {
-                            let cursor = winuser::LoadCursorW(
-                                ptr::null_mut(),
-                                window_state.cursor.0,
-                            );
-                            winuser::SetCursor(cursor);
-                            false
+                        if window_state.mouse.cursor_flags().contains(CursorFlags::IN_WINDOW) {
+                            Some(window_state.mouse.cursor)
                         } else {
-                            true
+                            None
                         }
                     })
-                    .unwrap_or(true)
             });
 
-            if call_def_window_proc {
-                winuser::DefWindowProcW(window, msg, wparam, lparam)
-            } else {
-                0
+            match set_cursor_to {
+                Some(cursor) => {
+                    let cursor = winuser::LoadCursorW(
+                        ptr::null_mut(),
+                        cursor.to_windows_cursor(),
+                    );
+                    winuser::SetCursor(cursor);
+                    0
+                },
+                None => winuser::DefWindowProcW(window, msg, wparam, lparam)
             }
         },
 
         winuser::WM_DROPFILES => {
-            use events::WindowEvent::DroppedFile;
-
-            let hdrop = wparam as shellapi::HDROP;
-            let mut pathbuf: [u16; MAX_PATH] = mem::uninitialized();
-            let num_drops = shellapi::DragQueryFileW(hdrop, 0xFFFFFFFF, ptr::null_mut(), 0);
-
-            for i in 0..num_drops {
-                let nch = shellapi::DragQueryFileW(hdrop, i, pathbuf.as_mut_ptr(),
-                                                  MAX_PATH as u32) as usize;
-                if nch > 0 {
-                    send_event(Event::WindowEvent {
-                        window_id: SuperWindowId(WindowId(window)),
-                        event: DroppedFile(OsString::from_wide(&pathbuf[0..nch]).into())
-                    });
-                }
-            }
-
-            shellapi::DragFinish(hdrop);
+            // See `FileDropHandler` for implementation.
             0
         },
 
@@ -1061,10 +1118,12 @@ pub unsafe extern "system" fn callback(
                             let style = winuser::GetWindowLongA(window, winuser::GWL_STYLE) as DWORD;
                             let ex_style = winuser::GetWindowLongA(window, winuser::GWL_EXSTYLE) as DWORD;
                             if let Some(min_size) = window_state.min_size {
+                                let min_size = min_size.to_physical(window_state.dpi_factor);
                                 let (width, height) = adjust_size(min_size, style, ex_style);
                                 (*mmi).ptMinTrackSize = POINT { x: width as i32, y: height as i32 };
                             }
                             if let Some(max_size) = window_state.max_size {
+                                let max_size = max_size.to_physical(window_state.dpi_factor);
                                 let (width, height) = adjust_size(max_size, style, ex_style);
                                 (*mmi).ptMaxTrackSize = POINT { x: width as i32, y: height as i32 };
                             }
@@ -1088,38 +1147,21 @@ pub unsafe extern "system" fn callback(
             let new_dpi_x = u32::from(LOWORD(wparam as DWORD));
             let new_dpi_factor = dpi_to_scale_factor(new_dpi_x);
 
-            let suppress_resize = CONTEXT_STASH.with(|context_stash| {
-                context_stash
-                    .borrow()
-                    .as_ref()
-                    .and_then(|cstash| cstash.windows.get(&window))
-                    .map(|window_state_mutex| {
-                        let mut window_state = window_state_mutex.lock().unwrap();
-                        let suppress_resize = window_state.saved_window_info
-                            .as_mut()
-                            .map(|saved_window_info| {
-                                let dpi_changed = if !saved_window_info.is_fullscreen {
-                                    saved_window_info.dpi_factor.take() != Some(new_dpi_factor)
-                                } else {
-                                    false
-                                };
-                                !dpi_changed || saved_window_info.is_fullscreen
-                            })
-                            .unwrap_or(false);
-                        // Now we adjust the min/max dimensions for the new DPI.
-                        if !suppress_resize {
-                            let old_dpi_factor = window_state.dpi_factor;
-                            window_state.update_min_max(old_dpi_factor, new_dpi_factor);
-                        }
-                        window_state.dpi_factor = new_dpi_factor;
-                        suppress_resize
-                    })
-                    .unwrap_or(false)
+            let allow_resize = CONTEXT_STASH.with(|context_stash| {
+                if let Some(wstash) = context_stash.borrow().as_ref().and_then(|cstash| cstash.windows.get(&window)) {
+                    let mut window_state = wstash.lock().unwrap();
+                    let old_dpi_factor = window_state.dpi_factor;
+                    window_state.dpi_factor = new_dpi_factor;
+
+                    new_dpi_factor != old_dpi_factor && window_state.fullscreen.is_none()
+                } else {
+                    true
+                }
             });
 
             // This prevents us from re-applying DPI adjustment to the restored size after exiting
             // fullscreen (the restored size is already DPI adjusted).
-            if !suppress_resize {
+            if allow_resize {
                 // Resize window to the size suggested by Windows.
                 let rect = &*(lparam as *const RECT);
                 winuser::SetWindowPos(
@@ -1185,9 +1227,38 @@ pub unsafe extern "system" fn callback(
                     | winuser::SWP_NOACTIVATE,
                 );
                 0
+            } else if msg == *SET_RETAIN_STATE_ON_SIZE_MSG_ID {
+                CONTEXT_STASH.with(|context_stash| {
+                    if let Some(cstash) = context_stash.borrow().as_ref() {
+                        if let Some(wstash) = cstash.windows.get(&window) {
+                            let mut window_state = wstash.lock().unwrap();
+                            window_state.set_window_flags_in_place(|f| f.set(WindowFlags::MARKER_RETAIN_STATE_ON_SIZE, wparam != 0));
+                        }
+                    }
+                });
+                0
             } else {
                 winuser::DefWindowProcW(window, msg, wparam, lparam)
             }
         }
     }
 }
+
+pub unsafe extern "system" fn thread_event_target_callback(
+    window: HWND,
+    msg: UINT,
+    wparam: WPARAM,
+    lparam: LPARAM,
+) -> LRESULT {
+    // See `callback` comment.
+    run_catch_panic(-1, || {
+        match msg {
+            _ if msg == *EXEC_MSG_ID => {
+                let mut function: ThreadExecFn = Box::from_raw(wparam as usize as *mut _);
+                function(Inserter(ptr::null_mut()));
+                0
+            },
+            _ => winuser::DefWindowProcW(window, msg, wparam, lparam)
+        }
+    })
+}

src/platform/windows/icon.rs

@@ -22,11 +22,13 @@ pub enum IconType {
     Big = winuser::ICON_BIG as isize,
 }
 
-#[derive(Debug)]
+#[derive(Clone, Debug)]
 pub struct WinIcon {
     pub handle: HICON,
 }
 
+unsafe impl Send for WinIcon {}
+
 impl WinIcon {
     #[allow(dead_code)]
     pub fn from_path<P: AsRef<Path>>(path: P) -> Result<Self, util::WinError> {

src/platform/windows/mod.rs

@@ -18,7 +18,7 @@ unsafe impl Send for PlatformSpecificWindowBuilderAttributes {}
 unsafe impl Sync for PlatformSpecificWindowBuilderAttributes {}
 
 // Cursor name in UTF-16. Used to set cursor in `WM_SETCURSOR`.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy)]
 pub struct Cursor(pub *const winapi::ctypes::wchar_t);
 unsafe impl Send for Cursor {}
 unsafe impl Sync for Cursor {}
@@ -26,6 +26,12 @@ unsafe impl Sync for Cursor {}
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId(u32);
 
+impl DeviceId {
+    pub unsafe fn dummy() -> Self {
+        DeviceId(0)
+    }
+}
+
 impl DeviceId {
     pub fn get_persistent_identifier(&self) -> Option<String> {
         if self.0 != 0 {
@@ -48,7 +54,16 @@ pub struct WindowId(HWND);
 unsafe impl Send for WindowId {}
 unsafe impl Sync for WindowId {}
 
+impl WindowId {
+    pub unsafe fn dummy() -> Self {
+        use std::ptr::null_mut;
+
+        WindowId(null_mut())
+    }
+}
+
 mod dpi;
+mod drop_handler;
 mod event;
 mod events_loop;
 mod icon;
@@ -56,3 +71,4 @@ mod monitor;
 mod raw_input;
 mod util;
 mod window;
+mod window_state;

src/platform/windows/monitor.rs

@@ -1,5 +1,6 @@
 use winapi::shared::minwindef::{BOOL, DWORD, LPARAM, TRUE};
 use winapi::shared::windef::{HDC, HMONITOR, HWND, LPRECT, POINT};
+use winapi::um::winnt::LONG;
 use winapi::um::winuser;
 
 use std::{mem, ptr};
@@ -49,7 +50,7 @@ unsafe extern "system" fn monitor_enum_proc(
     TRUE // continue enumeration
 }
 
-fn get_available_monitors() -> VecDeque<MonitorId> {
+pub fn get_available_monitors() -> VecDeque<MonitorId> {
     let mut monitors: VecDeque<MonitorId> = VecDeque::new();
     unsafe {
         winuser::EnumDisplayMonitors(
@@ -62,7 +63,7 @@ fn get_available_monitors() -> VecDeque<MonitorId> {
     monitors
 }
 
-fn get_primary_monitor() -> MonitorId {
+pub fn get_primary_monitor() -> MonitorId {
     const ORIGIN: POINT = POINT { x: 0, y: 0 };
     let hmonitor = unsafe {
         winuser::MonitorFromPoint(ORIGIN, winuser::MONITOR_DEFAULTTOPRIMARY)
@@ -98,7 +99,7 @@ impl Window {
     }
 }
 
-fn get_monitor_info(hmonitor: HMONITOR) -> Result<winuser::MONITORINFOEXW, util::WinError> {
+pub(crate) fn get_monitor_info(hmonitor: HMONITOR) -> Result<winuser::MONITORINFOEXW, util::WinError> {
     let mut monitor_info: winuser::MONITORINFOEXW = unsafe { mem::uninitialized() };
     monitor_info.cbSize = mem::size_of::<winuser::MONITORINFOEXW>() as DWORD;
     let status = unsafe {
@@ -132,6 +133,14 @@ impl MonitorId {
         }
     }
 
+    pub(crate) fn contains_point(&self, point: &POINT) -> bool {
+        let left = self.position.0 as LONG;
+        let right = left + self.dimensions.0 as LONG;
+        let top = self.position.1 as LONG;
+        let bottom = top + self.dimensions.1 as LONG;
+        point.x >= left && point.x <= right && point.y >= top && point.y <= bottom
+    }
+
     #[inline]
     pub fn get_name(&self) -> Option<String> {
         Some(self.monitor_name.clone())

src/platform/windows/util.rs

@@ -1,9 +1,11 @@
-use std::{self, mem, ptr, slice};
+use std::{self, mem, ptr, slice, io};
 use std::ops::BitAnd;
+use std::sync::atomic::{AtomicBool, Ordering};
 
+use MouseCursor;
 use winapi::ctypes::wchar_t;
-use winapi::shared::minwindef::DWORD;
-use winapi::shared::windef::{HWND, RECT};
+use winapi::shared::minwindef::{BOOL, DWORD};
+use winapi::shared::windef::{HWND, POINT, RECT};
 use winapi::um::errhandlingapi::GetLastError;
 use winapi::um::winbase::{
     FormatMessageW,
@@ -38,22 +40,81 @@ pub fn wchar_ptr_to_string(wchar: *const wchar_t) -> String {
     wchar_to_string(wchar_slice)
 }
 
-pub fn get_window_rect(hwnd: HWND) -> Option<RECT> {
-    let mut rect: RECT = unsafe { mem::uninitialized() };
-    if unsafe { winuser::GetWindowRect(hwnd, &mut rect) } != 0 {
-        Some(rect)
+pub unsafe fn status_map<T, F: FnMut(&mut T) -> BOOL>(mut fun: F) -> Option<T> {
+    let mut data: T = mem::uninitialized();
+    if fun(&mut data) != 0 {
+        Some(data)
     } else {
         None
     }
 }
 
-// This won't be needed anymore if we just add a derive to winapi.
-pub fn rect_eq(a: &RECT, b: &RECT) -> bool {
-    let left_eq = a.left == b.left;
-    let right_eq = a.right == b.right;
-    let top_eq = a.top == b.top;
-    let bottom_eq = a.bottom == b.bottom;
-    left_eq && right_eq && top_eq && bottom_eq
+fn win_to_err<F: FnOnce() -> BOOL>(f: F) -> Result<(), io::Error> {
+    if f() != 0 {
+        Ok(())
+    } else {
+        Err(io::Error::last_os_error())
+    }
+}
+
+pub fn get_cursor_pos() -> Option<POINT> {
+    unsafe { status_map(|cursor_pos| winuser::GetCursorPos(cursor_pos)) }
+}
+
+pub fn get_window_rect(hwnd: HWND) -> Option<RECT> {
+    unsafe { status_map(|rect| winuser::GetWindowRect(hwnd, rect)) }
+}
+
+pub fn get_client_rect(hwnd: HWND) -> Result<RECT, io::Error> {
+    unsafe {
+        let mut rect = mem::uninitialized();
+        let mut top_left = mem::zeroed();
+
+        win_to_err(|| winuser::ClientToScreen(hwnd, &mut top_left))?;
+        win_to_err(|| winuser::GetClientRect(hwnd, &mut rect))?;
+        rect.left += top_left.x;
+        rect.top += top_left.y;
+        rect.right += top_left.x;
+        rect.bottom += top_left.y;
+
+        Ok(rect)
+    }
+}
+
+pub fn adjust_window_rect(hwnd: HWND, rect: RECT) -> Option<RECT> {
+    unsafe {
+        let style = winuser::GetWindowLongW(hwnd, winuser::GWL_STYLE);
+        let style_ex = winuser::GetWindowLongW(hwnd, winuser::GWL_EXSTYLE);
+        adjust_window_rect_with_styles(hwnd, style as _, style_ex as _, rect)
+    }
+}
+
+pub fn adjust_window_rect_with_styles(hwnd: HWND, style: DWORD, style_ex: DWORD, rect: RECT) -> Option<RECT> {
+    unsafe { status_map(|r| {
+        *r = rect;
+
+        let b_menu = !winuser::GetMenu(hwnd).is_null() as BOOL;
+        winuser::AdjustWindowRectEx(r, style as _ , b_menu, style_ex as _)
+    }) }
+}
+
+pub fn set_cursor_hidden(hidden: bool) {
+    static HIDDEN: AtomicBool = AtomicBool::new(false);
+    let changed = HIDDEN.swap(hidden, Ordering::SeqCst) ^ hidden;
+    if changed {
+        unsafe{ winuser::ShowCursor(!hidden as BOOL) };
+    }
+}
+
+pub fn set_cursor_clip(rect: Option<RECT>) -> Result<(), io::Error> {
+    unsafe {
+        let rect_ptr = rect.as_ref().map(|r| r as *const RECT).unwrap_or(ptr::null());
+        win_to_err(|| winuser::ClipCursor(rect_ptr))
+    }
+}
+
+pub fn is_focused(window: HWND) -> bool {
+    window == unsafe{ winuser::GetActiveWindow() }
 }
 
 #[derive(Debug, Default, Clone, PartialEq, Eq)]
@@ -94,3 +155,29 @@ pub unsafe fn get_last_error() -> Option<String> {
     }
     None
 }
+
+impl MouseCursor {
+    pub(crate) fn to_windows_cursor(self) -> *const wchar_t {
+        match self {
+            MouseCursor::Arrow | MouseCursor::Default => winuser::IDC_ARROW,
+            MouseCursor::Hand => winuser::IDC_HAND,
+            MouseCursor::Crosshair => winuser::IDC_CROSS,
+            MouseCursor::Text | MouseCursor::VerticalText => winuser::IDC_IBEAM,
+            MouseCursor::NotAllowed | MouseCursor::NoDrop => winuser::IDC_NO,
+            MouseCursor::Grab | MouseCursor::Grabbing |
+            MouseCursor::Move | MouseCursor::AllScroll => winuser::IDC_SIZEALL,
+            MouseCursor::EResize | MouseCursor::WResize |
+            MouseCursor::EwResize | MouseCursor::ColResize => winuser::IDC_SIZEWE,
+            MouseCursor::NResize | MouseCursor::SResize |
+            MouseCursor::NsResize | MouseCursor::RowResize => winuser::IDC_SIZENS,
+            MouseCursor::NeResize | MouseCursor::SwResize |
+            MouseCursor::NeswResize => winuser::IDC_SIZENESW,
+            MouseCursor::NwResize | MouseCursor::SeResize |
+            MouseCursor::NwseResize => winuser::IDC_SIZENWSE,
+            MouseCursor::Wait => winuser::IDC_WAIT,
+            MouseCursor::Progress => winuser::IDC_APPSTARTING,
+            MouseCursor::Help => winuser::IDC_HELP,
+            _ => winuser::IDC_ARROW, // use arrow for the missing cases.
+        }
+    }
+}

src/platform/windows/window.rs

@@ -1,18 +1,19 @@
 #![cfg(target_os = "windows")]
 
-use std::cell::{Cell, RefCell};
-use std::ffi::OsStr;
 use std::{io, mem, ptr};
+use std::cell::Cell;
+use std::ffi::OsStr;
 use std::os::windows::ffi::OsStrExt;
 use std::sync::{Arc, Mutex};
 use std::sync::mpsc::channel;
 
 use winapi::ctypes::c_int;
-use winapi::shared::minwindef::{BOOL, DWORD, FALSE, LPARAM, TRUE, UINT, WORD, WPARAM};
-use winapi::shared::windef::{HDC, HWND, LPPOINT, POINT, RECT};
+use winapi::shared::minwindef::{DWORD, LPARAM, UINT, WORD, WPARAM};
+use winapi::shared::windef::{HWND, POINT, RECT};
 use winapi::um::{combaseapi, dwmapi, libloaderapi, winuser};
-use winapi::um::objbase::{COINIT_MULTITHREADED};
+use winapi::um::objbase::COINIT_MULTITHREADED;
 use winapi::um::shobjidl_core::{CLSID_TaskbarList, ITaskbarList2};
+use winapi::um::wingdi::{CreateRectRgn, DeleteObject};
 use winapi::um::winnt::{LONG, LPCWSTR};
 
 use {
@@ -25,59 +26,29 @@ use {
     PhysicalSize,
     WindowAttributes,
 };
-use platform::platform::{Cursor, PlatformSpecificWindowBuilderAttributes, WindowId};
-use platform::platform::dpi::{BASE_DPI, dpi_to_scale_factor, get_window_dpi, get_window_scale_factor};
-use platform::platform::events_loop::{self, DESTROY_MSG_ID, EventsLoop, INITIAL_DPI_MSG_ID};
+use platform::platform::{PlatformSpecificWindowBuilderAttributes, WindowId};
+use platform::platform::dpi::{dpi_to_scale_factor, get_hwnd_dpi};
+use platform::platform::events_loop::{self, EventsLoop, DESTROY_MSG_ID, INITIAL_DPI_MSG_ID};
 use platform::platform::icon::{self, IconType, WinIcon};
+use platform::platform::monitor::get_available_monitors;
 use platform::platform::raw_input::register_all_mice_and_keyboards_for_raw_input;
 use platform::platform::util;
+use platform::platform::window_state::{CursorFlags, SavedWindow, WindowFlags, WindowState};
+
+use raw_window_handle::{windows::WindowsHandle, RawWindowHandle};
 
 /// The Win32 implementation of the main `Window` object.
 pub struct Window {
     /// Main handle for the window.
     window: WindowWrapper,
 
-    decorations: Cell<bool>,
-    maximized: Cell<bool>,
-    resizable: Cell<bool>,
-    fullscreen: RefCell<Option<::MonitorId>>,
-    always_on_top: Cell<bool>,
-
     /// The current window state.
-    window_state: Arc<Mutex<events_loop::WindowState>>,
-
-    window_icon: Cell<Option<WinIcon>>,
-    taskbar_icon: Cell<Option<WinIcon>>,
+    window_state: Arc<Mutex<WindowState>>,
 
     // The events loop proxy.
     events_loop_proxy: events_loop::EventsLoopProxy,
 }
 
-unsafe impl Send for Window {}
-unsafe impl Sync for Window {}
-
-// https://blogs.msdn.microsoft.com/oldnewthing/20131017-00/?p=2903
-// The idea here is that we use the Adjust­Window­Rect­Ex function to calculate how much additional
-// non-client area gets added due to the styles we passed. To make the math simple,
-// we ask for a zero client rectangle, so that the resulting window is all non-client.
-// And then we pass in the empty rectangle represented by the dot in the middle,
-// and the Adjust­Window­Rect­Ex expands the rectangle in all dimensions.
-// We see that it added ten pixels to the left, right, and bottom,
-// and it added fifty pixels to the top.
-// From this we can perform the reverse calculation: Instead of expanding the rectangle, we shrink it.
-unsafe fn unjust_window_rect(prc: &mut RECT, style: DWORD, ex_style: DWORD) -> BOOL {
-    let mut rc: RECT = mem::uninitialized();
-    winuser::SetRectEmpty(&mut rc);
-    let status = winuser::AdjustWindowRectEx(&mut rc, style, 0, ex_style);
-    if status != 0 {
-        prc.left -= rc.left;
-        prc.top -= rc.top;
-        prc.right -= rc.right;
-        prc.bottom -= rc.bottom;
-    }
-    status
-}
-
 impl Window {
     pub fn new(
         events_loop: &EventsLoop,
@@ -211,16 +182,16 @@ impl Window {
 
     pub(crate) fn set_inner_size_physical(&self, x: u32, y: u32) {
         unsafe {
-            let mut rect = RECT {
-                top: 0,
-                left: 0,
-                bottom: y as LONG,
-                right: x as LONG,
-            };
-            let dw_style = winuser::GetWindowLongA(self.window.0, winuser::GWL_STYLE) as DWORD;
-            let b_menu = !winuser::GetMenu(self.window.0).is_null() as BOOL;
-            let dw_style_ex = winuser::GetWindowLongA(self.window.0, winuser::GWL_EXSTYLE) as DWORD;
-            winuser::AdjustWindowRectEx(&mut rect, dw_style, b_menu, dw_style_ex);
+            let rect = util::adjust_window_rect(
+                self.window.0,
+                RECT {
+                    top: 0,
+                    left: 0,
+                    bottom: y as LONG,
+                    right: x as LONG,
+                }
+            ).expect("adjust_window_rect failed");
+
             let outer_x = (rect.right - rect.left).abs() as c_int;
             let outer_y = (rect.top - rect.bottom).abs() as c_int;
             winuser::SetWindowPos(
@@ -280,32 +251,17 @@ impl Window {
 
     #[inline]
     pub fn set_resizable(&self, resizable: bool) {
-        if resizable == self.resizable.get() {
-            return;
-        }
-        if self.fullscreen.borrow().is_some() {
-            // If we're in fullscreen, update stored configuration but don't apply anything.
-            self.resizable.replace(resizable);
-            return;
-        }
+        let window = self.window.clone();
+        let window_state = Arc::clone(&self.window_state);
 
-        let mut style = unsafe {
-            winuser::GetWindowLongW(self.window.0, winuser::GWL_STYLE)
-        };
-        if resizable {
-            style |= winuser::WS_SIZEBOX as LONG;
-        } else {
-            style &= !winuser::WS_SIZEBOX as LONG;
-        }
-
-        unsafe {
-            winuser::SetWindowLongW(
-                self.window.0,
-                winuser::GWL_STYLE,
-                style as _,
+        self.events_loop_proxy.execute_in_thread(move |_| {
+            WindowState::set_window_flags(
+                window_state.lock().unwrap(),
+                window.0,
+                None,
+                |f| f.set(WindowFlags::RESIZABLE, resizable),
             );
-        };
-        self.resizable.replace(resizable);
+        });
     }
 
     /// Returns the `hwnd` of this window.
@@ -315,127 +271,59 @@ impl Window {
     }
 
     #[inline]
-    pub fn set_cursor(&self, cursor: MouseCursor) {
-        let cursor_id = match cursor {
-            MouseCursor::Arrow | MouseCursor::Default => winuser::IDC_ARROW,
-            MouseCursor::Hand => winuser::IDC_HAND,
-            MouseCursor::Crosshair => winuser::IDC_CROSS,
-            MouseCursor::Text | MouseCursor::VerticalText => winuser::IDC_IBEAM,
-            MouseCursor::NotAllowed | MouseCursor::NoDrop => winuser::IDC_NO,
-            MouseCursor::Grab | MouseCursor::Grabbing |
-            MouseCursor::Move | MouseCursor::AllScroll => winuser::IDC_SIZEALL,
-            MouseCursor::EResize | MouseCursor::WResize |
-            MouseCursor::EwResize | MouseCursor::ColResize => winuser::IDC_SIZEWE,
-            MouseCursor::NResize | MouseCursor::SResize |
-            MouseCursor::NsResize | MouseCursor::RowResize => winuser::IDC_SIZENS,
-            MouseCursor::NeResize | MouseCursor::SwResize |
-            MouseCursor::NeswResize => winuser::IDC_SIZENESW,
-            MouseCursor::NwResize | MouseCursor::SeResize |
-            MouseCursor::NwseResize => winuser::IDC_SIZENWSE,
-            MouseCursor::Wait => winuser::IDC_WAIT,
-            MouseCursor::Progress => winuser::IDC_APPSTARTING,
-            MouseCursor::Help => winuser::IDC_HELP,
-            _ => winuser::IDC_ARROW, // use arrow for the missing cases.
+    pub fn raw_window_handle(&self) -> RawWindowHandle {
+        let handle = WindowsHandle {
+            hwnd: self.window.0 as *mut _,
+            ..WindowsHandle::empty()
         };
-
-        let mut cur = self.window_state.lock().unwrap();
-        cur.cursor = Cursor(cursor_id);
+        RawWindowHandle::Windows(handle)
     }
 
-    unsafe fn cursor_is_grabbed(&self) -> Result<bool, String> {
-        let mut client_rect: RECT = mem::uninitialized();
-        let mut clip_rect: RECT = mem::uninitialized();
-        if winuser::GetClientRect(self.window.0, &mut client_rect) == 0 {
-            return Err("`GetClientRect` failed".to_owned());
-        }
-        // A `POINT` is two `LONG`s (x, y), and the `RECT` field after `left` is `top`.
-        if winuser::ClientToScreen(self.window.0, &mut client_rect.left as *mut _ as LPPOINT) == 0 {
-            return Err("`ClientToScreen` (left, top) failed".to_owned());
-        }
-        if winuser::ClientToScreen(self.window.0, &mut client_rect.right as *mut _ as LPPOINT) == 0 {
-            return Err("`ClientToScreen` (right, bottom) failed".to_owned());
-        }
-        if winuser::GetClipCursor(&mut clip_rect) == 0 {
-            return Err("`GetClipCursor` failed".to_owned());
-        }
-        Ok(util::rect_eq(&client_rect, &clip_rect))
-    }
-
-    pub(crate) unsafe fn grab_cursor_inner(window: &WindowWrapper, grab: bool) -> Result<(), String> {
-        if grab {
-            let mut rect = mem::uninitialized();
-            if winuser::GetClientRect(window.0, &mut rect) == 0 {
-                return Err("`GetClientRect` failed".to_owned());
-            }
-            // A `POINT` is two `LONG`s (x, y), and the `RECT` field after `left` is `top`.
-            if winuser::ClientToScreen(window.0, &mut rect.left as *mut _ as LPPOINT) == 0 {
-                return Err("`ClientToScreen` (left, top) failed".to_owned());
-            }
-            if winuser::ClientToScreen(window.0, &mut rect.right as *mut _ as LPPOINT) == 0 {
-                return Err("`ClientToScreen` (right, bottom) failed".to_owned());
-            }
-            if winuser::ClipCursor(&rect) == 0 {
-                return Err("`ClipCursor` failed".to_owned());
-            }
-        } else {
-            if winuser::ClipCursor(ptr::null()) == 0 {
-                return Err("`ClipCursor` failed".to_owned());
-            }
-        }
-        Ok(())
+    #[inline]
+    pub fn set_cursor(&self, cursor: MouseCursor) {
+        self.window_state.lock().unwrap().mouse.cursor = cursor;
+        self.events_loop_proxy.execute_in_thread(move |_| unsafe {
+            let cursor = winuser::LoadCursorW(
+                ptr::null_mut(),
+                cursor.to_windows_cursor(),
+            );
+            winuser::SetCursor(cursor);
+        });
     }
 
     #[inline]
     pub fn grab_cursor(&self, grab: bool) -> Result<(), String> {
-        let currently_grabbed = unsafe { self.cursor_is_grabbed() }?;
-        let window_state = Arc::clone(&self.window_state);
-        {
-            let window_state_lock = window_state.lock().unwrap();
-            if currently_grabbed == grab
-            && grab == window_state_lock.cursor_grabbed {
-                return Ok(());
-            }
-        }
         let window = self.window.clone();
+        let window_state = Arc::clone(&self.window_state);
         let (tx, rx) = channel();
+
         self.events_loop_proxy.execute_in_thread(move |_| {
-            let result = unsafe { Self::grab_cursor_inner(&window, grab) };
-            if result.is_ok() {
-                window_state.lock().unwrap().cursor_grabbed = grab;
-            }
+            let result = window_state.lock().unwrap().mouse
+                .set_cursor_flags(window.0, |f| f.set(CursorFlags::GRABBED, grab))
+                .map_err(|e| e.to_string());
             let _ = tx.send(result);
         });
         rx.recv().unwrap()
     }
 
-    pub(crate) unsafe fn hide_cursor_inner(hide: bool) {
-        if hide {
-            winuser::ShowCursor(FALSE);
-        } else {
-            winuser::ShowCursor(TRUE);
-        }
-    }
-
     #[inline]
     pub fn hide_cursor(&self, hide: bool) {
+        let window = self.window.clone();
         let window_state = Arc::clone(&self.window_state);
-        {
-            let window_state_lock = window_state.lock().unwrap();
-            // We don't want to increment/decrement the display count more than once!
-            if hide == window_state_lock.cursor_hidden { return; }
-        }
         let (tx, rx) = channel();
+
         self.events_loop_proxy.execute_in_thread(move |_| {
-            unsafe { Self::hide_cursor_inner(hide) };
-            window_state.lock().unwrap().cursor_hidden = hide;
-            let _ = tx.send(());
+            let result = window_state.lock().unwrap().mouse
+                .set_cursor_flags(window.0, |f| f.set(CursorFlags::HIDDEN, hide))
+                .map_err(|e| e.to_string());
+            let _ = tx.send(result);
         });
-        rx.recv().unwrap()
+        rx.recv().unwrap().ok();
     }
 
     #[inline]
     pub fn get_hidpi_factor(&self) -> f64 {
-        get_window_scale_factor(self.window.0, self.window.1)
+        self.window_state.lock().unwrap().dpi_factor
     }
 
     fn set_cursor_position_physical(&self, x: i32, y: i32) -> Result<(), String> {
@@ -465,290 +353,113 @@ impl Window {
 
     #[inline]
     pub fn set_maximized(&self, maximized: bool) {
-        self.maximized.replace(maximized);
-        // We only maximize if we're not in fullscreen.
-        if self.fullscreen.borrow().is_some() { return; }
-
-        let window = self.window.clone();
-        unsafe {
-            // `ShowWindow` resizes the window, so it must be called from the main thread.
-            self.events_loop_proxy.execute_in_thread(move |_| {
-                winuser::ShowWindow(
-                    window.0,
-                    if maximized {
-                        winuser::SW_MAXIMIZE
-                    } else {
-                        winuser::SW_RESTORE
-                    },
-                );
-            });
-        }
-    }
-
-    unsafe fn set_fullscreen_style(&self) -> (LONG, LONG) {
-        let mut window_state = self.window_state.lock().unwrap();
-
-        if self.fullscreen.borrow().is_none() || window_state.saved_window_info.is_none() {
-            let rect = util::get_window_rect(self.window.0).expect("`GetWindowRect` failed");
-            let dpi_factor = Some(self.get_hidpi_factor());
-            window_state.saved_window_info = Some(events_loop::SavedWindowInfo {
-                style: winuser::GetWindowLongW(self.window.0, winuser::GWL_STYLE),
-                ex_style: winuser::GetWindowLongW(self.window.0, winuser::GWL_EXSTYLE),
-                rect,
-                is_fullscreen: true,
-                dpi_factor,
-            });
-        }
-
-        // We sync the system maximized state here, it will be used when restoring
-        let mut placement: winuser::WINDOWPLACEMENT = mem::zeroed();
-        placement.length = mem::size_of::<winuser::WINDOWPLACEMENT>() as u32;
-        winuser::GetWindowPlacement(self.window.0, &mut placement);
-        self.maximized.replace(placement.showCmd == (winuser::SW_SHOWMAXIMIZED as u32));
-        let saved_window_info = window_state.saved_window_info.as_ref().unwrap();
-
-        (saved_window_info.style, saved_window_info.ex_style)
-    }
-
-    unsafe fn restore_saved_window(&self) {
-        let (rect, mut style, ex_style) = {
-            let mut window_state_lock = self.window_state.lock().unwrap();
-
-            // 'saved_window_info' can be None if the window has never been
-            // in fullscreen mode before this method gets called.
-            if window_state_lock.saved_window_info.is_none() {
-                return;
-            }
-
-            let saved_window_info = window_state_lock.saved_window_info.as_mut().unwrap();
-
-            // Reset original window style and size.  The multiple window size/moves
-            // here are ugly, but if SetWindowPos() doesn't redraw, the taskbar won't be
-            // repainted.  Better-looking methods welcome.
-            saved_window_info.is_fullscreen = false;
-
-            let rect = saved_window_info.rect.clone();
-            let (style, ex_style) = (saved_window_info.style, saved_window_info.ex_style);
-            (rect, style, ex_style)
-        };
         let window = self.window.clone();
         let window_state = Arc::clone(&self.window_state);
 
-        let maximized = self.maximized.get();
-        let resizable = self.resizable.get();
-
-        // We're restoring the window to its size and position from before being fullscreened.
-        // `ShowWindow` resizes the window, so it must be called from the main thread.
         self.events_loop_proxy.execute_in_thread(move |_| {
-            let _ = Self::grab_cursor_inner(&window, false);
-
-            if resizable {
-                style |= winuser::WS_SIZEBOX as LONG;
-            } else {
-                style &= !winuser::WS_SIZEBOX as LONG;
-            }
-            winuser::SetWindowLongW(window.0, winuser::GWL_STYLE, style);
-            winuser::SetWindowLongW(window.0, winuser::GWL_EXSTYLE, ex_style);
-
-            winuser::SetWindowPos(
+            WindowState::set_window_flags(
+                window_state.lock().unwrap(),
                 window.0,
-                ptr::null_mut(),
-                rect.left,
-                rect.top,
-                rect.right - rect.left,
-                rect.bottom - rect.top,
-                winuser::SWP_ASYNCWINDOWPOS
-                | winuser::SWP_NOZORDER
-                | winuser::SWP_NOACTIVATE
-                | winuser::SWP_FRAMECHANGED,
+                None,
+                |f| f.set(WindowFlags::MAXIMIZED, maximized),
             );
-
-            // We apply any requested changes to maximization state that occurred while we were in fullscreen.
-            winuser::ShowWindow(
-                window.0,
-                if maximized {
-                    winuser::SW_MAXIMIZE
-                } else {
-                    winuser::SW_RESTORE
-                },
-            );
-
-            mark_fullscreen(window.0, false);
-
-            let window_state_lock = window_state.lock().unwrap();
-            let _ = Self::grab_cursor_inner(&window, window_state_lock.cursor_grabbed);
         });
     }
 
+    #[inline]
+    pub fn get_fullscreen(&self) -> Option<RootMonitorId> {
+        let window_state = self.window_state.lock().unwrap();
+        window_state.fullscreen.clone()
+    }
+
     #[inline]
     pub fn set_fullscreen(&self, monitor: Option<RootMonitorId>) {
         unsafe {
+            let window = self.window.clone();
+            let window_state = Arc::clone(&self.window_state);
+
             match &monitor {
                 &Some(RootMonitorId { ref inner }) => {
                     let (x, y): (i32, i32) = inner.get_position().into();
                     let (width, height): (u32, u32) = inner.get_dimensions().into();
-                    let window = self.window.clone();
-                    let window_state = Arc::clone(&self.window_state);
-
-                    let (style, ex_style) = self.set_fullscreen_style();
 
+                    let mut monitor = monitor.clone();
                     self.events_loop_proxy.execute_in_thread(move |_| {
-                        let _ = Self::grab_cursor_inner(&window, false);
+                        let mut window_state_lock = window_state.lock().unwrap();
 
-                        winuser::SetWindowLongW(
-                            window.0,
-                            winuser::GWL_STYLE,
-                            ((style as DWORD) & !(winuser::WS_CAPTION | winuser::WS_THICKFRAME))
-                                as LONG,
-                        );
+                        let client_rect = util::get_client_rect(window.0).expect("get client rect failed!");
+                        window_state_lock.saved_window = Some(SavedWindow {
+                            client_rect,
+                            dpi_factor: window_state_lock.dpi_factor
+                        });
 
-                        winuser::SetWindowLongW(
+                        window_state_lock.fullscreen = monitor.take();
+                        WindowState::refresh_window_state(
+                            window_state_lock,
                             window.0,
-                            winuser::GWL_EXSTYLE,
-                            ((ex_style as DWORD)
-                                & !(winuser::WS_EX_DLGMODALFRAME | winuser::WS_EX_WINDOWEDGE
-                                    | winuser::WS_EX_CLIENTEDGE
-                                    | winuser::WS_EX_STATICEDGE))
-                                as LONG,
-                        );
-
-                        winuser::SetWindowPos(
-                            window.0,
-                            ptr::null_mut(),
-                            x as c_int,
-                            y as c_int,
-                            width as c_int,
-                            height as c_int,
-                            winuser::SWP_ASYNCWINDOWPOS | winuser::SWP_NOZORDER
-                                | winuser::SWP_NOACTIVATE
-                                | winuser::SWP_FRAMECHANGED,
+                            Some(RECT {
+                                left: x,
+                                top: y,
+                                right: x + width as c_int,
+                                bottom: y + height as c_int,
+                            })
                         );
 
                         mark_fullscreen(window.0, true);
-
-                        let window_state_lock = window_state.lock().unwrap();
-                        let _ = Self::grab_cursor_inner(&window, window_state_lock.cursor_grabbed);
                     });
                 }
                 &None => {
-                    self.restore_saved_window();
+                    self.events_loop_proxy.execute_in_thread(move |_| {
+                        let mut window_state_lock = window_state.lock().unwrap();
+                        window_state_lock.fullscreen = None;
+
+                        if let Some(SavedWindow{client_rect, dpi_factor}) = window_state_lock.saved_window {
+                            window_state_lock.dpi_factor = dpi_factor;
+                            window_state_lock.saved_window = None;
+
+                            WindowState::refresh_window_state(
+                                window_state_lock,
+                                window.0,
+                                Some(client_rect)
+                            );
+                        }
+
+                        mark_fullscreen(window.0, false);
+                    });
                 }
             }
         }
-
-        self.fullscreen.replace(monitor);
     }
 
     #[inline]
     pub fn set_decorations(&self, decorations: bool) {
-        if self.decorations.get() == decorations {
-            return;
-        }
+        let window = self.window.clone();
+        let window_state = Arc::clone(&self.window_state);
 
-        let style_flags = (winuser::WS_CAPTION | winuser::WS_THICKFRAME) as LONG;
-        let ex_style_flags = (winuser::WS_EX_WINDOWEDGE) as LONG;
-
-        // if we are in fullscreen mode, we only change the saved window info
-        if self.fullscreen.borrow().is_some() {
-            {
-                let mut window_state = self.window_state.lock().unwrap();
-                let saved = window_state.saved_window_info.as_mut().unwrap();
-
-                unsafe {
-                    unjust_window_rect(&mut saved.rect, saved.style as _, saved.ex_style as _);
-                }
-
-                if decorations {
-                    saved.style = saved.style | style_flags;
-                    saved.ex_style = saved.ex_style | ex_style_flags;
-                } else {
-                    saved.style = saved.style & !style_flags;
-                    saved.ex_style = saved.ex_style & !ex_style_flags;
-                }
-
-                unsafe {
-                    winuser::AdjustWindowRectEx(
-                        &mut saved.rect,
-                        saved.style as _,
-                        0,
-                        saved.ex_style as _,
-                    );
-                }
-            }
-
-            self.decorations.replace(decorations);
-            return;
-        }
-
-        unsafe {
-            let mut rect: RECT = mem::zeroed();
-            winuser::GetWindowRect(self.window.0, &mut rect);
-
-            let mut style = winuser::GetWindowLongW(self.window.0, winuser::GWL_STYLE);
-            let mut ex_style = winuser::GetWindowLongW(self.window.0, winuser::GWL_EXSTYLE);
-            unjust_window_rect(&mut rect, style as _, ex_style as _);
-
-            if decorations {
-                style = style | style_flags;
-                ex_style = ex_style | ex_style_flags;
-            } else {
-                style = style & !style_flags;
-                ex_style = ex_style & !ex_style_flags;
-            }
-
-            let window = self.window.clone();
-
-            self.events_loop_proxy.execute_in_thread(move |_| {
-                winuser::SetWindowLongW(window.0, winuser::GWL_STYLE, style);
-                winuser::SetWindowLongW(window.0, winuser::GWL_EXSTYLE, ex_style);
-                winuser::AdjustWindowRectEx(&mut rect, style as _, 0, ex_style as _);
-
-                winuser::SetWindowPos(
-                    window.0,
-                    ptr::null_mut(),
-                    rect.left,
-                    rect.top,
-                    rect.right - rect.left,
-                    rect.bottom - rect.top,
-                    winuser::SWP_ASYNCWINDOWPOS
-                    | winuser::SWP_NOZORDER
-                    | winuser::SWP_NOACTIVATE
-                    | winuser::SWP_FRAMECHANGED,
-                );
-            });
-        }
-
-        self.decorations.replace(decorations);
+        self.events_loop_proxy.execute_in_thread(move |_| {
+            let client_rect = util::get_client_rect(window.0).expect("get client rect failed!");
+            WindowState::set_window_flags(
+                window_state.lock().unwrap(),
+                window.0,
+                Some(client_rect),
+                |f| f.set(WindowFlags::DECORATIONS, decorations),
+            );
+        });
     }
 
     #[inline]
     pub fn set_always_on_top(&self, always_on_top: bool) {
-        if self.always_on_top.get() == always_on_top {
-            return;
-        }
-
         let window = self.window.clone();
-        self.events_loop_proxy.execute_in_thread(move |_| {
-            let insert_after = if always_on_top {
-                winuser::HWND_TOPMOST
-            } else {
-                winuser::HWND_NOTOPMOST
-            };
-            unsafe {
-                winuser::SetWindowPos(
-                    window.0,
-                    insert_after,
-                    0,
-                    0,
-                    0,
-                    0,
-                    winuser::SWP_ASYNCWINDOWPOS | winuser::SWP_NOMOVE | winuser::SWP_NOSIZE,
-                );
-                winuser::UpdateWindow(window.0);
-            }
-        });
+        let window_state = Arc::clone(&self.window_state);
 
-        self.always_on_top.replace(always_on_top);
+        self.events_loop_proxy.execute_in_thread(move |_| {
+            WindowState::set_window_flags(
+                window_state.lock().unwrap(),
+                window.0,
+                None,
+                |f| f.set(WindowFlags::ALWAYS_ON_TOP, always_on_top),
+            );
+        });
     }
 
     #[inline]
@@ -768,7 +479,7 @@ impl Window {
         } else {
             icon::unset_for_window(self.window.0, IconType::Small);
         }
-        self.window_icon.replace(window_icon);
+        self.window_state.lock().unwrap().window_icon = window_icon;
     }
 
     #[inline]
@@ -781,7 +492,7 @@ impl Window {
         } else {
             icon::unset_for_window(self.window.0, IconType::Big);
         }
-        self.taskbar_icon.replace(taskbar_icon);
+        self.window_state.lock().unwrap().taskbar_icon = taskbar_icon;
     }
 
     #[inline]
@@ -804,17 +515,27 @@ impl Drop for Window {
 /// A simple non-owning wrapper around a window.
 #[doc(hidden)]
 #[derive(Clone)]
-pub struct WindowWrapper(HWND, HDC);
+pub struct WindowWrapper(HWND);
 
-// Send is not implemented for HWND and HDC, we have to wrap it and implement it manually.
+// Send and Sync are not implemented for HWND and HDC, we have to wrap it and implement them manually.
 // For more info see:
 // https://github.com/retep998/winapi-rs/issues/360
 // https://github.com/retep998/winapi-rs/issues/396
+unsafe impl Sync for WindowWrapper {}
 unsafe impl Send for WindowWrapper {}
 
-pub unsafe fn adjust_size(physical_size: PhysicalSize, style: DWORD, ex_style: DWORD) -> (LONG, LONG) {
+pub unsafe fn adjust_size(
+    physical_size: PhysicalSize,
+    style: DWORD,
+    ex_style: DWORD,
+) -> (LONG, LONG) {
     let (width, height): (u32, u32) = physical_size.into();
-    let mut rect = RECT { left: 0, right: width as LONG, top: 0, bottom: height as LONG };
+    let mut rect = RECT {
+        left: 0,
+        right: width as LONG,
+        top: 0,
+        bottom: height as LONG,
+    };
     winuser::AdjustWindowRectEx(&mut rect, style, 0, ex_style);
     (rect.right - rect.left, rect.bottom - rect.top)
 }
@@ -858,83 +579,58 @@ unsafe fn init(
     // registering the window class
     let class_name = register_window_class(&window_icon, &taskbar_icon);
 
-    let (width, height) = attributes.dimensions
-        .map(Into::into)
-        .unwrap_or((1024, 768));
-    // building a RECT object with coordinates
-    let mut rect = RECT {
-        left: 0,
-        right: width as LONG,
-        top: 0,
-        bottom: height as LONG,
-    };
-
-    // computing the style and extended style of the window
-    let (mut ex_style, style) = if !attributes.decorations {
-        (winuser::WS_EX_APPWINDOW,
-            //winapi::WS_POPUP is incompatible with winapi::WS_CHILD
-            if pl_attribs.parent.is_some() {
-                winuser::WS_CLIPSIBLINGS | winuser::WS_CLIPCHILDREN
+    let guessed_dpi_factor = {
+        let monitors = get_available_monitors();
+        let dpi_factor = if !monitors.is_empty() {
+            let mut dpi_factor = Some(monitors[0].get_hidpi_factor());
+            for monitor in &monitors {
+                if Some(monitor.get_hidpi_factor()) != dpi_factor {
+                    dpi_factor = None;
+                }
             }
-            else {
-                winuser::WS_POPUP | winuser::WS_CLIPSIBLINGS | winuser::WS_CLIPCHILDREN
-            }
-        )
-    } else {
-        (winuser::WS_EX_APPWINDOW | winuser::WS_EX_WINDOWEDGE,
-            winuser::WS_OVERLAPPEDWINDOW | winuser::WS_CLIPSIBLINGS | winuser::WS_CLIPCHILDREN)
+            dpi_factor
+        } else {
+            return Err(CreationError::OsError(format!("No monitors were detected.")));
+        };
+        dpi_factor.unwrap_or_else(|| {
+            util::get_cursor_pos()
+                .and_then(|cursor_pos| {
+                    let mut dpi_factor = None;
+                    for monitor in &monitors {
+                        if monitor.contains_point(&cursor_pos) {
+                            dpi_factor = Some(monitor.get_hidpi_factor());
+                            break;
+                        }
+                    }
+                    dpi_factor
+                })
+                .unwrap_or(1.0)
+        })
     };
+    info!("Guessed window DPI factor: {}", guessed_dpi_factor);
 
-    if attributes.always_on_top {
-        ex_style |= winuser::WS_EX_TOPMOST;
-    }
-    if pl_attribs.no_redirection_bitmap {
-        ex_style |= winuser::WS_EX_NOREDIRECTIONBITMAP;
-    }
+    let dimensions = attributes.dimensions.unwrap_or_else(|| (1024, 768).into());
 
-    // adjusting the window coordinates using the style
-    winuser::AdjustWindowRectEx(&mut rect, style, 0, ex_style);
+    let mut window_flags = WindowFlags::empty();
+    window_flags.set(WindowFlags::DECORATIONS, attributes.decorations);
+    window_flags.set(WindowFlags::ALWAYS_ON_TOP, attributes.always_on_top);
+    window_flags.set(WindowFlags::NO_BACK_BUFFER, pl_attribs.no_redirection_bitmap);
+    window_flags.set(WindowFlags::TRANSPARENT, attributes.transparent);
+    // WindowFlags::VISIBLE and MAXIMIZED are set down below after the window has been configured.
+    window_flags.set(WindowFlags::RESIZABLE, attributes.resizable);
+    window_flags.set(WindowFlags::CHILD, pl_attribs.parent.is_some());
+    window_flags.set(WindowFlags::ON_TASKBAR, true);
 
     // creating the real window this time, by using the functions in `extra_functions`
     let real_window = {
-        let (adjusted_width, adjusted_height) = if attributes.dimensions.is_some() {
-            let min_dimensions = attributes.min_dimensions
-                .map(|logical_size| PhysicalSize::from_logical(logical_size, 1.0))
-                .map(|physical_size| adjust_size(physical_size, style, ex_style))
-                .unwrap_or((0, 0));
-            let max_dimensions = attributes.max_dimensions
-                .map(|logical_size| PhysicalSize::from_logical(logical_size, 1.0))
-                .map(|physical_size| adjust_size(physical_size, style, ex_style))
-                .unwrap_or((c_int::max_value(), c_int::max_value()));
-            (
-                Some((rect.right - rect.left).min(max_dimensions.0).max(min_dimensions.0)),
-                Some((rect.bottom - rect.top).min(max_dimensions.1).max(min_dimensions.1))
-            )
-        } else {
-            (None, None)
-        };
-
-        let mut style = if !attributes.visible {
-            style
-        } else {
-            style | winuser::WS_VISIBLE
-        };
-
-        if !attributes.resizable {
-            style &= !winuser::WS_SIZEBOX;
-        }
-
-        if pl_attribs.parent.is_some() {
-            style |= winuser::WS_CHILD;
-        }
-
-        let handle = winuser::CreateWindowExW(ex_style | winuser::WS_EX_ACCEPTFILES,
+        let (style, ex_style) = window_flags.to_window_styles();
+        let handle = winuser::CreateWindowExW(
+            ex_style,
             class_name.as_ptr(),
             title.as_ptr() as LPCWSTR,
-            style | winuser::WS_CLIPSIBLINGS | winuser::WS_CLIPCHILDREN,
+            style,
+            winuser::CW_USEDEFAULT, winuser::CW_USEDEFAULT,
             winuser::CW_USEDEFAULT, winuser::CW_USEDEFAULT,
-            adjusted_width.unwrap_or(winuser::CW_USEDEFAULT),
-            adjusted_height.unwrap_or(winuser::CW_USEDEFAULT),
             pl_attribs.parent.unwrap_or(ptr::null_mut()),
             ptr::null_mut(),
             libloaderapi::GetModuleHandleW(ptr::null()),
@@ -946,13 +642,7 @@ unsafe fn init(
                                               format!("{}", io::Error::last_os_error()))));
         }
 
-        let hdc = winuser::GetDC(handle);
-        if hdc.is_null() {
-            return Err(CreationError::OsError(format!("GetDC function failed: {}",
-                                              format!("{}", io::Error::last_os_error()))));
-        }
-
-        WindowWrapper(handle, hdc)
+        WindowWrapper(handle)
     };
 
     // Set up raw input
@@ -966,9 +656,10 @@ unsafe fn init(
         }
     }
 
-    let dpi = get_window_dpi(real_window.0, real_window.1);
+    let dpi = get_hwnd_dpi(real_window.0);
     let dpi_factor = dpi_to_scale_factor(dpi);
-    if dpi != BASE_DPI {
+    if dpi_factor != guessed_dpi_factor {
+        let (width, height): (u32, u32) = dimensions.into();
         let mut packed_dimensions = 0;
         // MAKELPARAM isn't provided by winapi yet.
         let ptr = &mut packed_dimensions as *mut LPARAM as *mut WORD;
@@ -982,56 +673,68 @@ unsafe fn init(
         );
     }
 
-    let window_state = {
-        let max_size = attributes.max_dimensions
-            .map(|logical_size| PhysicalSize::from_logical(logical_size, dpi_factor));
-        let min_size = attributes.min_dimensions
-            .map(|logical_size| PhysicalSize::from_logical(logical_size, dpi_factor));
-        let mut window_state = events_loop::WindowState {
-            cursor: Cursor(winuser::IDC_ARROW), // use arrow by default
-            cursor_grabbed: false,
-            cursor_hidden: false,
-            max_size,
-            min_size,
-            mouse_in_window: false,
-            saved_window_info: None,
-            dpi_factor,
-        };
-        // Creating a mutex to track the current window state
-        Arc::new(Mutex::new(window_state))
-    };
-
     // making the window transparent
     if attributes.transparent && !pl_attribs.no_redirection_bitmap {
+        let region = CreateRectRgn(0, 0, -1, -1); // makes the window transparent
+
         let bb = dwmapi::DWM_BLURBEHIND {
-            dwFlags: 0x1, // FIXME: DWM_BB_ENABLE;
+            dwFlags: dwmapi::DWM_BB_ENABLE | dwmapi::DWM_BB_BLURREGION,
             fEnable: 1,
-            hRgnBlur: ptr::null_mut(),
+            hRgnBlur: region,
             fTransitionOnMaximized: 0,
         };
 
         dwmapi::DwmEnableBlurBehindWindow(real_window.0, &bb);
+        DeleteObject(region as _);
+
+        if attributes.decorations {
+            // HACK: When opaque (opacity 255), there is a trail whenever
+            // the transparent window is moved. By reducing it to 254,
+            // the window is rendered properly.
+            let opacity = 254;
+
+            // The color key can be any value except for black (0x0).
+            let color_key = 0x0030c100;
+
+            winuser::SetLayeredWindowAttributes(real_window.0, color_key, opacity, winuser::LWA_ALPHA);
+        }
     }
 
+    window_flags.set(WindowFlags::VISIBLE, attributes.visible);
+    window_flags.set(WindowFlags::MAXIMIZED, attributes.maximized);
+
+    let window_state = {
+        let mut window_state = WindowState::new(
+            &attributes,
+            window_icon,
+            taskbar_icon,
+            dpi_factor,
+        );
+        let window_state = Arc::new(Mutex::new(window_state));
+        WindowState::set_window_flags(
+            window_state.lock().unwrap(),
+            real_window.0,
+            None,
+            |f| *f = window_flags,
+        );
+        window_state
+    };
+
     let win = Window {
         window: real_window,
-        window_state: window_state,
-        decorations: Cell::new(attributes.decorations),
-        maximized: Cell::new(attributes.maximized.clone()),
-        resizable: Cell::new(attributes.resizable.clone()),
-        fullscreen: RefCell::new(attributes.fullscreen.clone()),
-        always_on_top: Cell::new(attributes.always_on_top),
-        window_icon: Cell::new(window_icon),
-        taskbar_icon: Cell::new(taskbar_icon),
+        window_state,
         events_loop_proxy,
     };
 
-    win.set_maximized(attributes.maximized);
     if let Some(_) = attributes.fullscreen {
         win.set_fullscreen(attributes.fullscreen);
         force_window_active(win.window.0);
     }
 
+    if let Some(dimensions) = attributes.dimensions {
+        win.set_inner_size(dimensions);
+    }
+
     inserter.insert(win.window.0, win.window_state.clone());
 
     Ok(win)
@@ -1079,7 +782,6 @@ unsafe fn register_window_class(
     class_name
 }
 
-
 struct ComInitialized(*mut ());
 impl Drop for ComInitialized {
     fn drop(&mut self) {

src/platform/windows/window_state.rs

@@ -0,0 +1,329 @@
+use {MouseCursor, WindowAttributes};
+use std::{io, ptr};
+use std::sync::MutexGuard;
+use dpi::LogicalSize;
+use platform::platform::{util, events_loop};
+use platform::platform::icon::WinIcon;
+use winapi::shared::windef::{RECT, HWND};
+use winapi::shared::minwindef::DWORD;
+use winapi::um::winuser;
+
+/// Contains information about states and the window that the callback is going to use.
+#[derive(Clone)]
+pub struct WindowState {
+    pub mouse: MouseProperties,
+
+    /// Used by `WM_GETMINMAXINFO`.
+    pub min_size: Option<LogicalSize>,
+    pub max_size: Option<LogicalSize>,
+
+    pub window_icon: Option<WinIcon>,
+    pub taskbar_icon: Option<WinIcon>,
+
+    pub saved_window: Option<SavedWindow>,
+    pub dpi_factor: f64,
+
+    pub fullscreen: Option<::MonitorId>,
+    window_flags: WindowFlags,
+}
+
+#[derive(Clone)]
+pub struct SavedWindow {
+    pub client_rect: RECT,
+    pub dpi_factor: f64,
+}
+
+#[derive(Clone)]
+pub struct MouseProperties {
+    pub cursor: MouseCursor,
+    cursor_flags: CursorFlags,
+}
+
+bitflags! {
+    pub struct CursorFlags: u8 {
+        const GRABBED   = 1 << 0;
+        const HIDDEN    = 1 << 1;
+        const IN_WINDOW = 1 << 2;
+    }
+}
+bitflags! {
+    pub struct WindowFlags: u32 {
+        const RESIZABLE      = 1 << 0;
+        const DECORATIONS    = 1 << 1;
+        const VISIBLE        = 1 << 2;
+        const ON_TASKBAR     = 1 << 3;
+        const ALWAYS_ON_TOP  = 1 << 4;
+        const NO_BACK_BUFFER = 1 << 5;
+        const TRANSPARENT    = 1 << 6;
+        const CHILD          = 1 << 7;
+        const MAXIMIZED      = 1 << 8;
+
+        /// Marker flag for fullscreen. Should always match `WindowState::fullscreen`, but is
+        /// included here to make masking easier.
+        const MARKER_FULLSCREEN = 1 << 9;
+
+        /// The `WM_SIZE` event contains some parameters that can effect the state of `WindowFlags`.
+        /// In most cases, it's okay to let those parameters change the state. However, when we're
+        /// running the `WindowFlags::apply_diff` function, we *don't* want those parameters to
+        /// effect our stored state, because the purpose of `apply_diff` is to update the actual
+        /// window's state to match our stored state. This controls whether to accept those changes.
+        const MARKER_RETAIN_STATE_ON_SIZE = 1 << 10;
+
+        const FULLSCREEN_AND_MASK = !(
+            WindowFlags::DECORATIONS.bits |
+            WindowFlags::RESIZABLE.bits |
+            WindowFlags::MAXIMIZED.bits
+        );
+        const NO_DECORATIONS_AND_MASK = !WindowFlags::RESIZABLE.bits;
+        const INVISIBLE_AND_MASK = !WindowFlags::MAXIMIZED.bits;
+    }
+}
+
+impl WindowState {
+    pub fn new(
+        attributes: &WindowAttributes,
+        window_icon: Option<WinIcon>,
+        taskbar_icon: Option<WinIcon>,
+        dpi_factor: f64
+    ) -> WindowState {
+        WindowState {
+            mouse: MouseProperties {
+                cursor: MouseCursor::default(),
+                cursor_flags: CursorFlags::empty(),
+            },
+
+            min_size: attributes.min_dimensions,
+            max_size: attributes.max_dimensions,
+
+            window_icon,
+            taskbar_icon,
+
+            saved_window: None,
+            dpi_factor,
+
+            fullscreen: None,
+            window_flags: WindowFlags::empty()
+        }
+    }
+
+    pub fn window_flags(&self) -> WindowFlags {
+        self.window_flags
+    }
+
+    pub fn set_window_flags<F>(mut this: MutexGuard<Self>, window: HWND, set_client_rect: Option<RECT>, f: F)
+        where F: FnOnce(&mut WindowFlags)
+    {
+        let old_flags = this.window_flags;
+        f(&mut this.window_flags);
+
+        let is_fullscreen = this.fullscreen.is_some();
+        this.window_flags.set(WindowFlags::MARKER_FULLSCREEN, is_fullscreen);
+        let new_flags = this.window_flags;
+
+        drop(this);
+        old_flags.apply_diff(window, new_flags, set_client_rect);
+    }
+
+    pub fn refresh_window_state(this: MutexGuard<Self>, window: HWND, set_client_rect: Option<RECT>) {
+        Self::set_window_flags(this, window, set_client_rect, |_| ());
+    }
+
+    pub fn set_window_flags_in_place<F>(&mut self, f: F)
+        where F: FnOnce(&mut WindowFlags)
+    {
+        f(&mut self.window_flags);
+    }
+}
+
+impl MouseProperties {
+    pub fn cursor_flags(&self) -> CursorFlags {
+        self.cursor_flags
+    }
+
+    pub fn set_cursor_flags<F>(&mut self, window: HWND, f: F) -> Result<(), io::Error>
+        where F: FnOnce(&mut CursorFlags)
+    {
+        let old_flags = self.cursor_flags;
+        f(&mut self.cursor_flags);
+        match self.cursor_flags.refresh_os_cursor(window) {
+            Ok(()) => (),
+            Err(e) => {
+                self.cursor_flags = old_flags;
+                return Err(e);
+            }
+        }
+
+        Ok(())
+    }
+}
+
+impl WindowFlags {
+    fn mask(mut self) -> WindowFlags {
+        if self.contains(WindowFlags::MARKER_FULLSCREEN) {
+            self &= WindowFlags::FULLSCREEN_AND_MASK;
+        }
+        if !self.contains(WindowFlags::VISIBLE) {
+            self &= WindowFlags::INVISIBLE_AND_MASK;
+        }
+        if !self.contains(WindowFlags::DECORATIONS) {
+            self &= WindowFlags::NO_DECORATIONS_AND_MASK;
+        }
+        self
+    }
+
+    pub fn to_window_styles(self) -> (DWORD, DWORD) {
+        use winapi::um::winuser::*;
+
+        let (mut style, mut style_ex) = (0, 0);
+
+        if self.contains(WindowFlags::RESIZABLE) {
+            style |= WS_SIZEBOX | WS_MAXIMIZEBOX;
+        }
+        if self.contains(WindowFlags::DECORATIONS) {
+            style |= WS_CAPTION | WS_MINIMIZEBOX | WS_BORDER;
+            style_ex = WS_EX_WINDOWEDGE;
+        }
+        if self.contains(WindowFlags::VISIBLE) {
+            style |= WS_VISIBLE;
+        }
+        if self.contains(WindowFlags::ON_TASKBAR) {
+            style_ex |= WS_EX_APPWINDOW;
+        }
+        if self.contains(WindowFlags::ALWAYS_ON_TOP) {
+            style_ex |= WS_EX_TOPMOST;
+        }
+        if self.contains(WindowFlags::NO_BACK_BUFFER) {
+            style_ex |= WS_EX_NOREDIRECTIONBITMAP;
+        }
+        if self.contains(WindowFlags::TRANSPARENT) {
+            // Is this necessary? The docs say that WS_EX_LAYERED requires a windows class without
+            // CS_OWNDC, and Winit windows have that flag set.
+            style_ex |= WS_EX_LAYERED;
+        }
+        if self.contains(WindowFlags::CHILD) {
+            style |= WS_CHILD; // This is incompatible with WS_POPUP if that gets added eventually.
+        }
+        if self.contains(WindowFlags::MAXIMIZED) {
+            style |= WS_MAXIMIZE;
+        }
+
+        style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_SYSMENU;
+        style_ex |= WS_EX_ACCEPTFILES;
+
+        (style, style_ex)
+    }
+
+    /// Adjust the window client rectangle to the return value, if present.
+    fn apply_diff(mut self, window: HWND, mut new: WindowFlags, set_client_rect: Option<RECT>) {
+        self = self.mask();
+        new = new.mask();
+
+        let diff = self ^ new;
+        if diff == WindowFlags::empty() {
+            return;
+        }
+
+        if diff.contains(WindowFlags::VISIBLE) {
+            unsafe {
+                winuser::ShowWindow(
+                    window,
+                    match new.contains(WindowFlags::VISIBLE) {
+                        true => winuser::SW_SHOW,
+                        false => winuser::SW_HIDE
+                    }
+                );
+            }
+        }
+        if diff.contains(WindowFlags::ALWAYS_ON_TOP) {
+            unsafe {
+                winuser::SetWindowPos(
+                    window,
+                    match new.contains(WindowFlags::ALWAYS_ON_TOP) {
+                        true  => winuser::HWND_TOPMOST,
+                        false => winuser::HWND_NOTOPMOST,
+                    },
+                    0, 0, 0, 0,
+                    winuser::SWP_ASYNCWINDOWPOS | winuser::SWP_NOMOVE | winuser::SWP_NOSIZE,
+                );
+                winuser::UpdateWindow(window);
+            }
+        }
+
+        if diff.contains(WindowFlags::MAXIMIZED) || new.contains(WindowFlags::MAXIMIZED) {
+            unsafe {
+                winuser::ShowWindow(
+                    window,
+                    match new.contains(WindowFlags::MAXIMIZED) {
+                        true => winuser::SW_MAXIMIZE,
+                        false => winuser::SW_RESTORE
+                    }
+                );
+            }
+        }
+
+        if diff != WindowFlags::empty() {
+            let (style, style_ex) = new.to_window_styles();
+
+            unsafe {
+                winuser::SendMessageW(window, *events_loop::SET_RETAIN_STATE_ON_SIZE_MSG_ID, 1, 0);
+
+                winuser::SetWindowLongW(window, winuser::GWL_STYLE, style as _);
+                winuser::SetWindowLongW(window, winuser::GWL_EXSTYLE, style_ex as _);
+
+                match set_client_rect.and_then(|r| util::adjust_window_rect_with_styles(window, style, style_ex, r)) {
+                    Some(client_rect) => {
+                        let (x, y, w, h) = (
+                            client_rect.left,
+                            client_rect.top,
+                            client_rect.right - client_rect.left,
+                            client_rect.bottom - client_rect.top,
+                        );
+                        winuser::SetWindowPos(
+                            window,
+                            ptr::null_mut(),
+                            x, y, w, h,
+                            winuser::SWP_NOZORDER
+                            | winuser::SWP_FRAMECHANGED,
+                        );
+                    },
+                    None => {
+                        // Refresh the window frame.
+                        winuser::SetWindowPos(
+                            window,
+                            ptr::null_mut(),
+                            0, 0, 0, 0,
+                            winuser::SWP_NOZORDER
+                            | winuser::SWP_NOMOVE
+                            | winuser::SWP_NOSIZE
+                            | winuser::SWP_FRAMECHANGED,
+                        );
+                    }
+                }
+                winuser::SendMessageW(window, *events_loop::SET_RETAIN_STATE_ON_SIZE_MSG_ID, 0, 0);
+            }
+        }
+    }
+}
+
+impl CursorFlags {
+    fn refresh_os_cursor(self, window: HWND) -> Result<(), io::Error> {
+        let client_rect = util::get_client_rect(window)?;
+
+        if util::is_focused(window) {
+            if self.contains(CursorFlags::GRABBED) {
+                util::set_cursor_clip(Some(client_rect))?;
+            } else {
+                util::set_cursor_clip(None)?;
+            }
+        }
+
+        let cursor_in_client = self.contains(CursorFlags::IN_WINDOW);
+        if cursor_in_client {
+            util::set_cursor_hidden(self.contains(CursorFlags::HIDDEN));
+        } else {
+            util::set_cursor_hidden(false);
+        }
+
+        Ok(())
+    }
+}

src/window.rs

@@ -304,6 +304,10 @@ impl Window {
     ///
     /// See the [`dpi`](dpi/index.html) module for more information.
     ///
+    /// Note that this value can change depending on user action (for example if the window is
+    /// moved to another screen); as such, tracking `WindowEvent::HiDpiFactorChanged` events is
+    /// the most robust way to track the DPI you need to use to draw.
+    ///
     /// ## Platform-specific
     ///
     /// - **X11:** Can be overridden using the `WINIT_HIDPI_FACTOR` environment variable.
@@ -365,6 +369,12 @@ impl Window {
         self.window.set_fullscreen(monitor)
     }
 
+    /// Gets the window's current fullscreen state.
+    #[inline]
+    pub fn get_fullscreen(&self) -> Option<MonitorId> {
+        self.window.get_fullscreen()
+    }
+
     /// Turn window decorations on or off.
     #[inline]
     pub fn set_decorations(&self, decorations: bool) {
@@ -425,6 +435,12 @@ impl Window {
     }
 }
 
+unsafe impl raw_window_handle::HasRawWindowHandle for Window {
+    fn raw_window_handle(&self) -> raw_window_handle::RawWindowHandle {
+        self.window.raw_window_handle()
+    }
+}
+
 /// An iterator for the list of available monitors.
 // Implementation note: we retrieve the list once, then serve each element by one by one.
 // This may change in the future.
@@ -481,7 +497,7 @@ impl MonitorId {
     ///
     /// ## Platform-specific
     ///
-    /// - **X11:** Can be overridden using the `WINIT_HIDPI_FACTOR` environment variable.
+    /// - **X11:** This respects Xft.dpi XResource, and can be overridden using the `WINIT_HIDPI_FACTOR` environment variable.
     /// - **Android:** Always returns 1.0.
     #[inline]
     pub fn get_hidpi_factor(&self) -> f64 {

tests/serde_objects.rs

@@ -0,0 +1,39 @@
+#![cfg(feature = "serde")]
+
+extern crate serde;
+extern crate winit;
+
+use winit::{ControlFlow, MouseCursor};
+use winit::{
+    KeyboardInput, TouchPhase, ElementState, MouseButton, MouseScrollDelta, VirtualKeyCode,
+    ModifiersState
+};
+use winit::dpi::{LogicalPosition, PhysicalPosition, LogicalSize, PhysicalSize};
+use serde::{Serialize, Deserialize};
+
+fn needs_serde<S: Serialize + Deserialize<'static>>() {}
+
+#[test]
+fn root_serde() {
+    needs_serde::<ControlFlow>();
+    needs_serde::<MouseCursor>();
+}
+
+#[test]
+fn events_serde() {
+    needs_serde::<KeyboardInput>();
+    needs_serde::<TouchPhase>();
+    needs_serde::<ElementState>();
+    needs_serde::<MouseButton>();
+    needs_serde::<MouseScrollDelta>();
+    needs_serde::<VirtualKeyCode>();
+    needs_serde::<ModifiersState>();
+}
+
+#[test]
+fn dpi_serde() {
+    needs_serde::<LogicalPosition>();
+    needs_serde::<PhysicalPosition>();
+    needs_serde::<LogicalSize>();
+    needs_serde::<PhysicalSize>();
+}