Format everything and add rustfmt to travis (#951)

* Format everything and add rustfmt to travis

* Remove extern crate winit from examples and add force_multiline_blocks

* Format the code properly

* Fix inconsistent period in PULL_REQUEST_TEMPLATE.md

* Only run rustfmt on nightly

* Travis fixings

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,4 +1,5 @@
 - [ ] Tested on all platforms changed
+- [ ] `cargo fmt` has been run on this branch
 - [ ] 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

.travis.yml

@@ -45,8 +45,11 @@ matrix:
 install:
   - rustup self update
   - rustup target add $TARGET; true
+  - rustup install nightly
+  - rustup component add rustfmt --toolchain nightly
 
 script:
+  - cargo +nightly fmt --all -- --check
   - cargo build --target $TARGET --verbose
   - cargo build --target $TARGET --features serde --verbose
   # Running iOS apps on OSX requires the simulator so we skip that for now

README.md

@@ -31,10 +31,11 @@ show something on the window you need to use the platform-specific getters provi
 another library.
 
 ```rust
-extern crate winit;
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();

examples/cursor.rs

@@ -1,8 +1,8 @@
-extern crate winit;
-
-use winit::window::{WindowBuilder, CursorIcon};
-use winit::event::{Event, WindowEvent, ElementState, KeyboardInput};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{ElementState, Event, KeyboardInput, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::{CursorIcon, WindowBuilder},
+};
 
 fn main() {
     let event_loop = EventLoop::new();
@@ -14,7 +14,18 @@ fn main() {
 
     event_loop.run(move |event, _, control_flow| {
         match event {
-            Event::WindowEvent { event: WindowEvent::KeyboardInput { input: KeyboardInput { state: ElementState::Pressed, .. }, .. }, .. } => {
+            Event::WindowEvent {
+                event:
+                    WindowEvent::KeyboardInput {
+                        input:
+                            KeyboardInput {
+                                state: ElementState::Pressed,
+                                ..
+                            },
+                        ..
+                    },
+                ..
+            } => {
                 println!("Setting cursor to \"{:?}\"", CURSORS[cursor_idx]);
                 window.set_cursor_icon(CURSORS[cursor_idx]);
                 if cursor_idx < CURSORS.len() - 1 {
@@ -23,26 +34,52 @@ fn main() {
                     cursor_idx = 0;
                 }
             },
-            Event::WindowEvent { event: WindowEvent::CloseRequested, .. } => {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => {
                 *control_flow = ControlFlow::Exit;
                 return;
             },
-            _ => ()
+            _ => (),
         }
     });
 }
 
 const CURSORS: &[CursorIcon] = &[
-    CursorIcon::Default, CursorIcon::Crosshair, CursorIcon::Hand,
-    CursorIcon::Arrow, CursorIcon::Move, CursorIcon::Text,
-    CursorIcon::Wait, CursorIcon::Help, CursorIcon::Progress,
-    CursorIcon::NotAllowed, CursorIcon::ContextMenu, CursorIcon::Cell,
-    CursorIcon::VerticalText, CursorIcon::Alias, CursorIcon::Copy,
-    CursorIcon::NoDrop, CursorIcon::Grab, CursorIcon::Grabbing,
-    CursorIcon::AllScroll, CursorIcon::ZoomIn, CursorIcon::ZoomOut,
-    CursorIcon::EResize, CursorIcon::NResize, CursorIcon::NeResize,
-    CursorIcon::NwResize, CursorIcon::SResize, CursorIcon::SeResize,
-    CursorIcon::SwResize, CursorIcon::WResize, CursorIcon::EwResize,
-    CursorIcon::NsResize, CursorIcon::NeswResize, CursorIcon::NwseResize,
-    CursorIcon::ColResize, CursorIcon::RowResize
+    CursorIcon::Default,
+    CursorIcon::Crosshair,
+    CursorIcon::Hand,
+    CursorIcon::Arrow,
+    CursorIcon::Move,
+    CursorIcon::Text,
+    CursorIcon::Wait,
+    CursorIcon::Help,
+    CursorIcon::Progress,
+    CursorIcon::NotAllowed,
+    CursorIcon::ContextMenu,
+    CursorIcon::Cell,
+    CursorIcon::VerticalText,
+    CursorIcon::Alias,
+    CursorIcon::Copy,
+    CursorIcon::NoDrop,
+    CursorIcon::Grab,
+    CursorIcon::Grabbing,
+    CursorIcon::AllScroll,
+    CursorIcon::ZoomIn,
+    CursorIcon::ZoomOut,
+    CursorIcon::EResize,
+    CursorIcon::NResize,
+    CursorIcon::NeResize,
+    CursorIcon::NwResize,
+    CursorIcon::SResize,
+    CursorIcon::SeResize,
+    CursorIcon::SwResize,
+    CursorIcon::WResize,
+    CursorIcon::EwResize,
+    CursorIcon::NsResize,
+    CursorIcon::NeswResize,
+    CursorIcon::NwseResize,
+    CursorIcon::ColResize,
+    CursorIcon::RowResize,
 ];

examples/cursor_grab.rs

@@ -1,8 +1,8 @@
-extern crate winit;
-
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent, ElementState, KeyboardInput};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{ElementState, Event, KeyboardInput, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
@@ -18,7 +18,8 @@ fn main() {
             match event {
                 WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
                 WindowEvent::KeyboardInput {
-                    input: KeyboardInput {
+                    input:
+                        KeyboardInput {
                             state: ElementState::Released,
                             virtual_keycode: Some(key),
                             modifiers,
@@ -33,7 +34,7 @@ fn main() {
                         H => window.set_cursor_visible(modifiers.shift),
                         _ => (),
                     }
-                }
+                },
                 _ => (),
             }
         }

examples/fullscreen.rs

@@ -1,10 +1,10 @@
-extern crate winit;
-
 use std::io::{self, Write};
-use winit::monitor::MonitorHandle;
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent, VirtualKeyCode, ElementState, KeyboardInput};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    monitor::MonitorHandle,
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
@@ -24,7 +24,7 @@ fn main() {
             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
@@ -54,7 +54,8 @@ fn main() {
         *control_flow = ControlFlow::Wait;
 
         match event {
-            Event::WindowEvent { event, .. } => match event {
+            Event::WindowEvent { event, .. } => {
+                match event {
                     WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
                     WindowEvent::KeyboardInput {
                         input:
@@ -64,14 +65,18 @@ fn main() {
                                 ..
                             },
                         ..
-                } => match (virtual_code, state) {
+                    } => {
+                        match (virtual_code, state) {
                             (VirtualKeyCode::Escape, _) => *control_flow = ControlFlow::Exit,
                             (VirtualKeyCode::F, ElementState::Pressed) => {
                                 #[cfg(target_os = "macos")]
                                 {
                                     if macos_use_simple_fullscreen {
                                         use winit::platform::macos::WindowExtMacOS;
-                                if WindowExtMacOS::set_simple_fullscreen(&window, !is_fullscreen) {
+                                        if WindowExtMacOS::set_simple_fullscreen(
+                                            &window,
+                                            !is_fullscreen,
+                                        ) {
                                             is_fullscreen = !is_fullscreen;
                                         }
                                         return;
@@ -84,29 +89,34 @@ fn main() {
                                 } else {
                                     window.set_fullscreen(Some(window.current_monitor()));
                                 }
-                    }
+                            },
                             (VirtualKeyCode::S, ElementState::Pressed) => {
                                 println!("window.fullscreen {:?}", window.fullscreen());
 
                                 #[cfg(target_os = "macos")]
                                 {
                                     use winit::platform::macos::WindowExtMacOS;
-                            println!("window.simple_fullscreen {:?}", WindowExtMacOS::simple_fullscreen(&window));
-                        }
+                                    println!(
+                                        "window.simple_fullscreen {:?}",
+                                        WindowExtMacOS::simple_fullscreen(&window)
+                                    );
                                 }
+                            },
                             (VirtualKeyCode::M, ElementState::Pressed) => {
                                 is_maximized = !is_maximized;
                                 window.set_maximized(is_maximized);
-                    }
+                            },
                             (VirtualKeyCode::D, ElementState::Pressed) => {
                                 decorations = !decorations;
                                 window.set_decorations(decorations);
+                            },
+                            _ => (),
                         }
-                    _ => (),
                     },
                     _ => (),
+                }
             },
-            _ => {}
+            _ => {},
         }
     });
 }
@@ -123,7 +133,10 @@ fn prompt_for_monitor(event_loop: &EventLoop<()>) -> MonitorHandle {
     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 = event_loop.available_monitors().nth(num).expect("Please enter a valid ID");
+    let monitor = event_loop
+        .available_monitors()
+        .nth(num)
+        .expect("Please enter a valid ID");
 
     println!("Using {:?}", monitor.name());
 

examples/handling_close.rs

@@ -1,8 +1,8 @@
-extern crate winit;
-
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent, KeyboardInput};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{Event, KeyboardInput, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
@@ -15,12 +15,15 @@ fn main() {
     let mut close_requested = false;
 
     event_loop.run(move |event, _, control_flow| {
-        use winit::event::ElementState::Released;
-        use winit::event::VirtualKeyCode::{N, Y};
+        use winit::event::{
+            ElementState::Released,
+            VirtualKeyCode::{N, Y},
+        };
         *control_flow = ControlFlow::Wait;
 
         match event {
-            Event::WindowEvent { event, .. } => match event {
+            Event::WindowEvent { event, .. } => {
+                match event {
                     WindowEvent::CloseRequested => {
                         // `CloseRequested` is sent when the close button on the window is pressed (or
                         // through whatever other mechanisms the window manager provides for closing a
@@ -37,7 +40,7 @@ fn main() {
                         // action from the user, this is generally where you'd handle cleanup before
                         // closing the window. How to close the window is detailed in the handler for
                         // the Y key.
-                }
+                    },
                     WindowEvent::KeyboardInput {
                         input:
                             KeyboardInput {
@@ -46,7 +49,8 @@ fn main() {
                                 ..
                             },
                         ..
-                } => match virtual_code {
+                    } => {
+                        match virtual_code {
                             Y => {
                                 if close_requested {
                                     // This is where you'll want to do any cleanup you need.
@@ -59,16 +63,18 @@ fn main() {
                                     // sent.
                                     *control_flow = ControlFlow::Exit;
                                 }
-                    }
+                            },
                             N => {
                                 if close_requested {
                                     println!("Your window will continue to stay by your side.");
                                     close_requested = false;
                                 }
-                    }
-                    _ => (),
                             },
                             _ => (),
+                        }
+                    },
+                    _ => (),
+                }
             },
             _ => (),
         }

examples/min_max_size.rs

@@ -1,16 +1,14 @@
-extern crate winit;
-
-use winit::dpi::LogicalSize;
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    dpi::LogicalSize,
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
 
-    let window = WindowBuilder::new()
-        .build(&event_loop)
-        .unwrap();
+    let window = WindowBuilder::new().build(&event_loop).unwrap();
 
     window.set_min_inner_size(Some(LogicalSize::new(400.0, 200.0)));
     window.set_max_inner_size(Some(LogicalSize::new(800.0, 400.0)));
@@ -19,8 +17,10 @@ fn main() {
         println!("{:?}", event);
 
         match event {
-            Event::WindowEvent { event: WindowEvent::CloseRequested, .. } =>
-                *control_flow = ControlFlow::Exit,
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => *control_flow = ControlFlow::Exit,
             _ => *control_flow = ControlFlow::Wait,
         }
     });

examples/monitor_list.rs

@@ -1,6 +1,4 @@
-extern crate winit;
-use winit::event_loop::EventLoop;
-use winit::window::WindowBuilder;
+use winit::{event_loop::EventLoop, window::WindowBuilder};
 
 fn main() {
     let event_loop = EventLoop::new();

examples/multithreaded.rs

@@ -1,11 +1,10 @@
 extern crate env_logger;
-extern crate winit;
-
 use std::{collections::HashMap, sync::mpsc, thread, time::Duration};
 
 use winit::{
     event::{ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent},
-    event_loop::{ControlFlow, EventLoop}, window::{CursorIcon, WindowBuilder},
+    event_loop::{ControlFlow, EventLoop},
+    window::{CursorIcon, WindowBuilder},
 };
 
 const WINDOW_COUNT: usize = 3;
@@ -25,26 +24,34 @@ fn main() {
         thread::spawn(move || {
             while let Ok(event) = rx.recv() {
                 match event {
-                    WindowEvent::KeyboardInput { input: KeyboardInput {
+                    WindowEvent::KeyboardInput {
+                        input:
+                            KeyboardInput {
                                 state: ElementState::Released,
                                 virtual_keycode: Some(key),
                                 modifiers,
                                 ..
-                    }, .. } => {
+                            },
+                        ..
+                    } => {
                         window.set_title(&format!("{:?}", key));
                         let state = !modifiers.shift;
                         use self::VirtualKeyCode::*;
                         match key {
                             A => window.set_always_on_top(state),
-                            C => window.set_cursor_icon(match state {
+                            C => {
+                                window.set_cursor_icon(match state {
                                     true => CursorIcon::Progress,
                                     false => CursorIcon::Default,
-                            }),
+                                })
+                            },
                             D => window.set_decorations(!state),
-                            F => window.set_fullscreen(match state {
+                            F => {
+                                window.set_fullscreen(match state {
                                     true => Some(window.current_monitor()),
                                     false => None,
-                            }),
+                                })
+                            },
                             G => window.set_cursor_grab(state).unwrap(),
                             H => window.set_cursor_visible(!state),
                             I => {
@@ -54,28 +61,40 @@ fn main() {
                                 println!("-> outer_size     : {:?}", window.outer_size());
                                 println!("-> inner_size     : {:?}", window.inner_size());
                             },
-                            L => window.set_min_inner_size(match state {
+                            L => {
+                                window.set_min_inner_size(match state {
                                     true => Some(WINDOW_SIZE.into()),
                                     false => None,
-                            }),
+                                })
+                            },
                             M => window.set_maximized(state),
-                            P => window.set_outer_position({
+                            P => {
+                                window.set_outer_position({
                                     let mut position = window.outer_position().unwrap();
                                     let sign = if state { 1.0 } else { -1.0 };
                                     position.x += 10.0 * sign;
                                     position.y += 10.0 * sign;
                                     position
-                            }),
+                                })
+                            },
                             Q => window.request_redraw(),
                             R => window.set_resizable(state),
-                            S => window.set_inner_size(match state {
+                            S => {
+                                window.set_inner_size(
+                                    match state {
                                         true => (WINDOW_SIZE.0 + 100, WINDOW_SIZE.1 + 100),
                                         false => WINDOW_SIZE,
-                            }.into()),
-                            W => window.set_cursor_position((
-                                WINDOW_SIZE.0 as i32 / 2,
-                                WINDOW_SIZE.1 as i32 / 2,
-                            ).into()).unwrap(),
+                                    }
+                                    .into(),
+                                )
+                            },
+                            W => {
+                                window
+                                    .set_cursor_position(
+                                        (WINDOW_SIZE.0 as i32 / 2, WINDOW_SIZE.1 as i32 / 2).into(),
+                                    )
+                                    .unwrap()
+                            },
                             Z => {
                                 window.set_visible(false);
                                 thread::sleep(Duration::from_secs(1));
@@ -99,16 +118,23 @@ fn main() {
                 match event {
                     WindowEvent::CloseRequested
                     | WindowEvent::Destroyed
-                    | WindowEvent::KeyboardInput { input: KeyboardInput {
+                    | WindowEvent::KeyboardInput {
+                        input:
+                            KeyboardInput {
                                 virtual_keycode: Some(VirtualKeyCode::Escape),
-                    .. }, .. } => {
+                                ..
+                            },
+                        ..
+                    } => {
                         window_senders.remove(&window_id);
                     },
-                    _ => if let Some(tx) = window_senders.get(&window_id) {
+                    _ => {
+                        if let Some(tx) = window_senders.get(&window_id) {
                             tx.send(event).unwrap();
+                        }
                     },
                 }
-            }
+            },
             _ => (),
         }
     })

examples/multiwindow.rs

@@ -1,9 +1,9 @@
-extern crate winit;
-
 use std::collections::HashMap;
-use winit::window::Window;
-use winit::event::{Event, WindowEvent, ElementState, KeyboardInput};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{ElementState, Event, KeyboardInput, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::Window,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
@@ -29,13 +29,20 @@ fn main() {
                             *control_flow = ControlFlow::Exit;
                         }
                     },
-                    WindowEvent::KeyboardInput { input: KeyboardInput { state: ElementState::Pressed, .. }, .. } => {
+                    WindowEvent::KeyboardInput {
+                        input:
+                            KeyboardInput {
+                                state: ElementState::Pressed,
+                                ..
+                            },
+                        ..
+                    } => {
                         let window = Window::new(&event_loop).unwrap();
                         windows.insert(window.id(), window);
                     },
-                    _ => ()
-                }
+                    _ => (),
                 }
+            },
             _ => (),
         }
     })

examples/proxy.rs

@@ -1,7 +1,8 @@
-extern crate winit;
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop: EventLoop<i32> = EventLoop::new_user_event();
@@ -26,8 +27,10 @@ fn main() {
     event_loop.run(move |event, _, control_flow| {
         println!("{:?}", event);
         match event {
-            Event::WindowEvent { event: WindowEvent::CloseRequested, .. } =>
-                *control_flow = ControlFlow::Exit,
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => *control_flow = ControlFlow::Exit,
             _ => *control_flow = ControlFlow::Wait,
         }
     });

examples/request_redraw.rs

@@ -1,9 +1,10 @@
-extern crate winit;
-use std::time::{Instant, Duration};
+use std::time::{Duration, Instant};
 
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
@@ -25,7 +26,7 @@ fn main() {
                 window.request_redraw();
                 *control_flow = ControlFlow::WaitUntil(Instant::now() + Duration::new(1, 0))
             },
-            _ => ()
+            _ => (),
         }
     });
 }

examples/resizable.rs

@@ -1,7 +1,8 @@
-extern crate winit;
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent, VirtualKeyCode, ElementState, KeyboardInput};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
@@ -18,7 +19,8 @@ fn main() {
     event_loop.run(move |event, _, control_flow| {
         *control_flow = ControlFlow::Wait;
         match event {
-            Event::WindowEvent { event, .. } => match event {
+            Event::WindowEvent { event, .. } => {
+                match event {
                     WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
                     WindowEvent::KeyboardInput {
                         input:
@@ -32,8 +34,9 @@ fn main() {
                         resizable = !resizable;
                         println!("Resizable: {}", resizable);
                         window.set_resizable(resizable);
-                }
+                    },
                     _ => (),
+                }
             },
             _ => (),
         };

examples/timer.rs

@@ -1,8 +1,9 @@
-extern crate winit;
 use std::time::{Duration, Instant};
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent, StartCause};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{Event, StartCause, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
@@ -18,9 +19,10 @@ fn main() {
         println!("{:?}", event);
 
         match event {
-            Event::NewEvents(StartCause::Init) =>
-                *control_flow = ControlFlow::WaitUntil(Instant::now() + timer_length),
-            Event::NewEvents(StartCause::ResumeTimeReached{..}) => {
+            Event::NewEvents(StartCause::Init) => {
+                *control_flow = ControlFlow::WaitUntil(Instant::now() + timer_length)
+            },
+            Event::NewEvents(StartCause::ResumeTimeReached { .. }) => {
                 *control_flow = ControlFlow::WaitUntil(Instant::now() + timer_length);
                 println!("\nTimer\n");
             },
@@ -28,7 +30,7 @@ fn main() {
                 event: WindowEvent::CloseRequested,
                 ..
             } => *control_flow = ControlFlow::Exit,
-            _ => ()
+            _ => (),
         }
     });
 }

examples/transparent.rs

@@ -1,14 +1,17 @@
-extern crate winit;
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();
 
-    let window = WindowBuilder::new().with_decorations(false)
+    let window = WindowBuilder::new()
+        .with_decorations(false)
         .with_transparent(true)
-                                                 .build(&event_loop).unwrap();
+        .build(&event_loop)
+        .unwrap();
 
     window.set_title("A fantastic window!");
 
@@ -16,8 +19,10 @@ fn main() {
         println!("{:?}", event);
 
         match event {
-            Event::WindowEvent { event: WindowEvent::CloseRequested, .. } =>
-                *control_flow = ControlFlow::Exit,
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => *control_flow = ControlFlow::Exit,
             _ => *control_flow = ControlFlow::Wait,
         }
     });

examples/video_modes.rs

@@ -1,5 +1,3 @@
-extern crate winit;
-
 use winit::event_loop::EventLoop;
 
 fn main() {

examples/window.rs

@@ -1,7 +1,8 @@
-extern crate winit;
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent};
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
 
 fn main() {
     let event_loop = EventLoop::new();

examples/window_icon.rs

@@ -1,13 +1,12 @@
-extern crate winit;
 extern crate image;
-
 use std::path::Path;
-use winit::window::{WindowBuilder, Icon};
-use winit::event::Event;
-use winit::event_loop::{EventLoop, ControlFlow};
+use winit::{
+    event::Event,
+    event_loop::{ControlFlow, EventLoop},
+    window::{Icon, WindowBuilder},
+};
 
 fn main() {
-
     // 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
@@ -43,8 +42,6 @@ fn main() {
             match event {
                 CloseRequested => *control_flow = ControlFlow::Exit,
                 DroppedFile(path) => {
-                    
-
                     window.set_window_icon(Some(load_icon(&path)));
                 },
                 _ => (),

examples/window_run_return.rs

@@ -1,9 +1,9 @@
-extern crate winit;
-
-use winit::window::WindowBuilder;
-use winit::event::{Event, WindowEvent};
-use winit::event_loop::{EventLoop, ControlFlow};
-use winit::platform::desktop::EventLoopExtDesktop;
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    platform::desktop::EventLoopExtDesktop,
+    window::WindowBuilder,
+};
 
 fn main() {
     let mut event_loop = EventLoop::new();

rustfmt.toml

@@ -0,0 +1,7 @@
+merge_imports=true
+match_block_trailing_comma=true
+force_explicit_abi=true
+format_macro_matchers=true
+use_field_init_shorthand=true
+format_code_in_doc_comments=true
+force_multiline_blocks=true

src/dpi.rs

@@ -1,4 +1,3 @@
-
 //! DPI is important, so read the docs for this module if you don't want to be confused.
 //!
 //! Originally, `winit` dealt entirely in physical pixels (excluding unintentional inconsistencies), but now all

src/error.rs

@@ -1,5 +1,4 @@
-use std::fmt;
-use std::error;
+use std::{error, fmt};
 
 use crate::platform_impl;
 
@@ -30,20 +29,14 @@ impl NotSupportedError {
     #[inline]
     #[allow(dead_code)]
     pub(crate) fn new() -> NotSupportedError {
-        NotSupportedError {
-            _marker: ()
-        }
+        NotSupportedError { _marker: () }
     }
 }
 
 impl OsError {
     #[allow(dead_code)]
     pub(crate) fn new(line: u32, file: &'static str, error: platform_impl::OsError) -> OsError {
-        OsError {
-            line,
-            file,
-            error,
-        }
+        OsError { line, file, error }
     }
 }
 
@@ -51,12 +44,15 @@ impl OsError {
 macro_rules! os_error {
     ($error:expr) => {{
         crate::error::OsError::new(line!(), file!(), $error)
-    }}
+    }};
 }
 
 impl fmt::Display for OsError {
     fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
-        formatter.pad(&format!("os error at {}:{}: {}", self.file, self.line, self.error))
+        formatter.pad(&format!(
+            "os error at {}:{}: {}",
+            self.file, self.line, self.error
+        ))
     }
 }
 

src/event.rs

@@ -4,12 +4,13 @@
 //! processed and used to modify the program state. For more details, see the root-level documentation.
 //!
 //! [event_loop_run]: ../event_loop/struct.EventLoop.html#method.run
-use std::time::Instant;
-use std::path::PathBuf;
+use std::{path::PathBuf, time::Instant};
 
-use crate::dpi::{LogicalPosition, LogicalSize};
-use crate::window::WindowId;
-use crate::platform_impl;
+use crate::{
+    dpi::{LogicalPosition, LogicalSize},
+    platform_impl,
+    window::WindowId,
+};
 
 /// Describes a generic event.
 #[derive(Clone, Debug, PartialEq)]
@@ -47,8 +48,8 @@ impl<T> Event<T> {
         use self::Event::*;
         match self {
             UserEvent(_) => Err(self),
-            WindowEvent{window_id, event} => Ok(WindowEvent{window_id, event}),
-            DeviceEvent{device_id, event} => Ok(DeviceEvent{device_id, event}),
+            WindowEvent { window_id, event } => Ok(WindowEvent { window_id, event }),
+            DeviceEvent { device_id, event } => Ok(DeviceEvent { device_id, event }),
             NewEvents(cause) => Ok(NewEvents(cause)),
             EventsCleared => Ok(EventsCleared),
             LoopDestroyed => Ok(LoopDestroyed),
@@ -65,14 +66,14 @@ pub enum StartCause {
     /// guaranteed to be equal to or after the requested resume time.
     ResumeTimeReached {
         start: Instant,
-        requested_resume: Instant
+        requested_resume: Instant,
     },
 
     /// Sent if the OS has new events to send to the window, after a wait was requested. Contains
     /// the moment the wait was requested and the resume time, if requested.
     WaitCancelled {
         start: Instant,
-        requested_resume: Option<Instant>
+        requested_resume: Option<Instant>,
     },
 
     /// Sent if the event loop is being resumed after the loop's control flow was set to
@@ -80,7 +81,7 @@ pub enum StartCause {
     Poll,
 
     /// Sent once, immediately after `run` is called. Indicates that the loop was just initialized.
-    Init
+    Init,
 }
 
 /// Describes an event from a `Window`.
@@ -125,7 +126,10 @@ pub enum WindowEvent {
     Focused(bool),
 
     /// An event from the keyboard has been received.
-    KeyboardInput { device_id: DeviceId, input: KeyboardInput },
+    KeyboardInput {
+        device_id: DeviceId,
+        input: KeyboardInput,
+    },
 
     /// The cursor has moved on the window.
     CursorMoved {
@@ -135,7 +139,7 @@ pub enum WindowEvent {
         /// limited by the display area and it may have been transformed by the OS to implement effects such as cursor
         /// acceleration, it should not be used to implement non-cursor-like interactions such as 3D camera control.
         position: LogicalPosition,
-        modifiers: ModifiersState
+        modifiers: ModifiersState,
     },
 
     /// The cursor has entered the window.
@@ -145,21 +149,38 @@ pub enum WindowEvent {
     CursorLeft { device_id: DeviceId },
 
     /// A mouse wheel movement or touchpad scroll occurred.
-    MouseWheel { device_id: DeviceId, delta: MouseScrollDelta, phase: TouchPhase, modifiers: ModifiersState },
+    MouseWheel {
+        device_id: DeviceId,
+        delta: MouseScrollDelta,
+        phase: TouchPhase,
+        modifiers: ModifiersState,
+    },
 
     /// An mouse button press has been received.
-    MouseInput { device_id: DeviceId, state: ElementState, button: MouseButton, modifiers: ModifiersState },
-
+    MouseInput {
+        device_id: DeviceId,
+        state: ElementState,
+        button: MouseButton,
+        modifiers: ModifiersState,
+    },
 
     /// Touchpad pressure event.
     ///
     /// At the moment, only supported on Apple forcetouch-capable macbooks.
     /// The parameters are: pressure level (value between 0 and 1 representing how hard the touchpad
     /// is being pressed) and stage (integer representing the click level).
-    TouchpadPressure { device_id: DeviceId, pressure: f32, stage: i64 },
+    TouchpadPressure {
+        device_id: DeviceId,
+        pressure: f32,
+        stage: i64,
+    },
 
     /// Motion on some analog axis. May report data redundant to other, more specific events.
-    AxisMotion { device_id: DeviceId, axis: AxisId, value: f64 },
+    AxisMotion {
+        device_id: DeviceId,
+        axis: AxisId,
+        value: f64,
+    },
 
     /// The OS or application has requested that the window be redrawn.
     RedrawRequested,
@@ -229,11 +250,19 @@ pub enum DeviceEvent {
     /// Motion on some analog axis.  This event will be reported for all arbitrary input devices
     /// that winit supports on this platform, including mouse devices.  If the device is a mouse
     /// device then this will be reported alongside the MouseMotion event.
-    Motion { axis: AxisId, value: f64 },
+    Motion {
+        axis: AxisId,
+        value: f64,
+    },
 
-    Button { button: ButtonId, state: ElementState },
+    Button {
+        button: ButtonId,
+        state: ElementState,
+    },
     Key(KeyboardInput),
-    Text { codepoint: char },
+    Text {
+        codepoint: char,
+    },
 }
 
 /// Describes a keyboard input event.
@@ -259,7 +288,7 @@ pub struct KeyboardInput {
     ///
     /// This is tracked internally to avoid tracking errors arising from modifier key state changes when events from
     /// this device are not being delivered to the application, e.g. due to keyboard focus being elsewhere.
-    pub modifiers: ModifiersState
+    pub modifiers: ModifiersState,
 }
 
 /// Describes touch-screen input state.
@@ -269,7 +298,7 @@ pub enum TouchPhase {
     Started,
     Moved,
     Ended,
-    Cancelled
+    Cancelled,
 }
 
 /// Represents touch event
@@ -293,7 +322,7 @@ pub struct Touch {
     pub phase: TouchPhase,
     pub location: LogicalPosition,
     /// unique identifier of a finger.
-    pub id: u64
+    pub id: u64,
 }
 
 /// Hardware-dependent keyboard scan code.
@@ -557,5 +586,5 @@ pub struct ModifiersState {
     /// The "logo" key
     ///
     /// This is the "windows" key on PC and "command" key on Mac.
-    pub logo: bool
+    pub logo: bool,
 }

src/event_loop.rs

@@ -9,13 +9,13 @@
 //! [create_proxy]: ./struct.EventLoop.html#method.create_proxy
 //! [event_loop_proxy]: ./struct.EventLoopProxy.html
 //! [send_event]: ./struct.EventLoopProxy.html#method.send_event
-use std::{fmt, error};
-use std::time::Instant;
-use std::ops::Deref;
+use std::{error, fmt, ops::Deref, time::Instant};
 
-use crate::platform_impl;
-use crate::event::Event;
-use crate::monitor::{AvailableMonitorsIter, MonitorHandle};
+use crate::{
+    event::Event,
+    monitor::{AvailableMonitorsIter, MonitorHandle},
+    platform_impl,
+};
 
 /// Provides a way to retrieve events from the system and from the windows that were registered to
 /// the events loop.
@@ -32,7 +32,7 @@ use crate::monitor::{AvailableMonitorsIter, MonitorHandle};
 /// `EventLoopProxy` allows you to wake up an `EventLoop` from an other thread.
 pub struct EventLoop<T: 'static> {
     pub(crate) event_loop: platform_impl::EventLoop<T>,
-    pub(crate) _marker: ::std::marker::PhantomData<*mut ()> // Not Send nor Sync
+    pub(crate) _marker: ::std::marker::PhantomData<*mut ()>, // Not Send nor Sync
 }
 
 /// Target that associates windows with an `EventLoop`.
@@ -42,7 +42,7 @@ pub struct EventLoop<T: 'static> {
 /// take `&EventLoop`.
 pub struct EventLoopWindowTarget<T: 'static> {
     pub(crate) p: platform_impl::EventLoopWindowTarget<T>,
-    pub(crate) _marker: ::std::marker::PhantomData<*mut ()> // Not Send nor Sync
+    pub(crate) _marker: ::std::marker::PhantomData<*mut ()>, // Not Send nor Sync
 }
 
 impl<T> fmt::Debug for EventLoop<T> {
@@ -82,7 +82,7 @@ pub enum ControlFlow {
     /// Send a `LoopDestroyed` event and stop the event loop. This variant is *sticky* - once set,
     /// `control_flow` cannot be changed from `Exit`, and any future attempts to do so will result
     /// in the `control_flow` parameter being reset to `Exit`.
-    Exit
+    Exit,
 }
 
 impl Default for ControlFlow {
@@ -133,7 +133,8 @@ impl<T> EventLoop<T> {
     /// [`ControlFlow`]: ./enum.ControlFlow.html
     #[inline]
     pub fn run<F>(self, event_handler: F) -> !
-        where F: 'static + FnMut(Event<T>, &EventLoopWindowTarget<T>, &mut ControlFlow)
+    where
+        F: 'static + FnMut(Event<T>, &EventLoopWindowTarget<T>, &mut ControlFlow),
     {
         self.event_loop.run(event_handler)
     }
@@ -149,13 +150,17 @@ impl<T> EventLoop<T> {
     #[inline]
     pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle> {
         let data = self.event_loop.available_monitors();
-        AvailableMonitorsIter{ data: data.into_iter() }
+        AvailableMonitorsIter {
+            data: data.into_iter(),
+        }
     }
 
     /// Returns the primary monitor of the system.
     #[inline]
     pub fn primary_monitor(&self) -> MonitorHandle {
-        MonitorHandle { inner: self.event_loop.primary_monitor() }
+        MonitorHandle {
+            inner: self.event_loop.primary_monitor(),
+        }
     }
 }
 
@@ -205,4 +210,3 @@ impl error::Error for EventLoopClosed {
         "Tried to wake up a closed `EventLoop`"
     }
 }
-

src/icon.rs

@@ -1,5 +1,4 @@
-use std::{fmt, mem};
-use std::error::Error;
+use std::{error::Error, fmt, mem};
 
 #[repr(C)]
 #[derive(Debug)]
@@ -17,9 +16,7 @@ pub(crate) const PIXEL_SIZE: usize = mem::size_of::<Pixel>();
 pub enum BadIcon {
     /// Produced when the length of the `rgba` argument isn't divisible by 4, thus `rgba` can't be
     /// safely interpreted as 32bpp RGBA pixels.
-    ByteCountNotDivisibleBy4 {
-        byte_count: usize,
-    },
+    ByteCountNotDivisibleBy4 { byte_count: usize },
     /// Produced when the number of pixels (`rgba.len() / 4`) isn't equal to `width * height`.
     /// At least one of your arguments is incorrect.
     DimensionsVsPixelCount {
@@ -76,7 +73,9 @@ impl Icon {
     /// `rgba.len() / 4`. Otherwise, this will return a `BadIcon` error.
     pub fn from_rgba(rgba: Vec<u8>, width: u32, height: u32) -> Result<Self, BadIcon> {
         if rgba.len() % PIXEL_SIZE != 0 {
-            return Err(BadIcon::ByteCountNotDivisibleBy4 { byte_count: rgba.len() });
+            return Err(BadIcon::ByteCountNotDivisibleBy4 {
+                byte_count: rgba.len(),
+            });
         }
         let pixel_count = rgba.len() / PIXEL_SIZE;
         if pixel_count != (width * height) as usize {
@@ -87,7 +86,11 @@ impl Icon {
                 pixel_count,
             })
         } else {
-            Ok(Icon { rgba, width, height })
+            Ok(Icon {
+                rgba,
+                width,
+                height,
+            })
         }
     }
 }

src/lib.rs

@@ -33,14 +33,19 @@
 //! is emitted and the entire program terminates.
 //!
 //! ```no_run
-//! use winit::event_loop::ControlFlow;
-//! use winit::event::{Event, WindowEvent};
+//! use winit::{
+//!     event::{Event, WindowEvent},
+//!     event_loop::ControlFlow,
+//! };
 //! # use winit::event_loop::EventLoop;
 //! # let event_loop = EventLoop::new();
 //!
 //! event_loop.run(move |event, _, control_flow| {
 //!     match event {
-//!         Event::WindowEvent { event: WindowEvent::CloseRequested, .. } => {
+//!         Event::WindowEvent {
+//!             event: WindowEvent::CloseRequested,
+//!             ..
+//!         } => {
 //!             println!("The close button was pressed; stopping");
 //!             *control_flow = ControlFlow::Exit
 //!         },
@@ -101,8 +106,8 @@ pub mod error;
 pub mod event;
 pub mod event_loop;
 mod icon;
+pub mod monitor;
 mod platform_impl;
 pub mod window;
-pub mod monitor;
 
 pub mod platform;

src/monitor.rs

@@ -12,8 +12,10 @@
 //! [window_get]: ../window/struct.Window.html#method.available_monitors
 use std::collections::vec_deque::IntoIter as VecDequeIter;
 
-use crate::platform_impl;
-use crate::dpi::{PhysicalPosition, PhysicalSize};
+use crate::{
+    dpi::{PhysicalPosition, PhysicalSize},
+    platform_impl,
+};
 
 /// An iterator over all available monitors.
 ///
@@ -90,7 +92,7 @@ impl VideoMode {
 /// [`Window`]: ../window/struct.Window.html
 #[derive(Debug, Clone)]
 pub struct MonitorHandle {
-    pub(crate) inner: platform_impl::MonitorHandle
+    pub(crate) inner: platform_impl::MonitorHandle,
 }
 
 impl MonitorHandle {

src/platform/android.rs

@@ -1,9 +1,7 @@
 #![cfg(any(target_os = "android"))]
 
+use crate::{EventLoop, Window, WindowBuilder};
 use std::os::raw::c_void;
-use crate::EventLoop;
-use crate::Window;
-use crate::WindowBuilder;
 
 /// Additional methods on `EventLoop` that are specific to Android.
 pub trait EventLoopExtAndroid {
@@ -30,9 +28,6 @@ impl WindowExtAndroid for Window {
 }
 
 /// Additional methods on `WindowBuilder` that are specific to Android.
-pub trait WindowBuilderExtAndroid {
+pub trait WindowBuilderExtAndroid {}
 
-}
-
-impl WindowBuilderExtAndroid for WindowBuilder {
-}
+impl WindowBuilderExtAndroid for WindowBuilder {}

src/platform/desktop.rs

@@ -4,8 +4,10 @@
     target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"
 ))]
 
-use crate::event::Event;
-use crate::event_loop::{EventLoop, EventLoopWindowTarget, ControlFlow};
+use crate::{
+    event::Event,
+    event_loop::{ControlFlow, EventLoop, EventLoopWindowTarget},
+};
 
 /// Additional methods on `EventLoop` that are specific to desktop platforms.
 pub trait EventLoopExtDesktop {
@@ -27,14 +29,16 @@ pub trait EventLoopExtDesktop {
     ///
     /// You are strongly encouraged to use `run`, unless the use of this is absolutely necessary.
     fn run_return<F>(&mut self, event_handler: F)
-        where F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>, &mut ControlFlow);
+    where
+        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>, &mut ControlFlow);
 }
 
 impl<T> EventLoopExtDesktop for EventLoop<T> {
     type UserEvent = T;
 
     fn run_return<F>(&mut self, event_handler: F)
-        where F: FnMut(Event<T>, &EventLoopWindowTarget<T>, &mut ControlFlow)
+    where
+        F: FnMut(Event<T>, &EventLoopWindowTarget<T>, &mut ControlFlow),
     {
         self.event_loop.run_return(event_handler)
     }

src/platform/ios.rs

@@ -2,9 +2,11 @@
 
 use std::os::raw::c_void;
 
-use crate::event_loop::EventLoop;
-use crate::monitor::MonitorHandle;
-use crate::window::{Window, WindowBuilder};
+use crate::{
+    event_loop::EventLoop,
+    monitor::MonitorHandle,
+    window::{Window, WindowBuilder},
+};
 
 /// Additional methods on `EventLoop` that are specific to iOS.
 pub trait EventLoopExtIOS {

src/platform/macos.rs

@@ -2,9 +2,11 @@
 
 use std::os::raw::c_void;
 
-use crate::dpi::LogicalSize;
-use crate::monitor::MonitorHandle;
-use crate::window::{Window, WindowBuilder};
+use crate::{
+    dpi::LogicalSize,
+    monitor::MonitorHandle,
+    window::{Window, WindowBuilder},
+};
 
 /// Additional methods on `Window` that are specific to MacOS.
 pub trait WindowExtMacOS {
@@ -97,7 +99,8 @@ pub trait WindowBuilderExtMacOS {
     /// Sets the activation policy for the window being built.
     fn with_activation_policy(self, activation_policy: ActivationPolicy) -> WindowBuilder;
     /// Enables click-and-drag behavior for the entire window, not just the titlebar.
-    fn with_movable_by_window_background(self, movable_by_window_background: bool) -> WindowBuilder;
+    fn with_movable_by_window_background(self, movable_by_window_background: bool)
+        -> WindowBuilder;
     /// Makes the titlebar transparent and allows the content to appear behind it.
     fn with_titlebar_transparent(self, titlebar_transparent: bool) -> WindowBuilder;
     /// Hides the window title.
@@ -120,7 +123,10 @@ impl WindowBuilderExtMacOS for WindowBuilder {
     }
 
     #[inline]
-    fn with_movable_by_window_background(mut self, movable_by_window_background: bool) -> WindowBuilder {
+    fn with_movable_by_window_background(
+        mut self,
+        movable_by_window_background: bool,
+    ) -> WindowBuilder {
         self.platform_specific.movable_by_window_background = movable_by_window_background;
         self
     }

src/platform/unix.rs

@@ -1,29 +1,26 @@
 #![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 std::{os::raw, ptr, sync::Arc};
 
 use smithay_client_toolkit::window::{ButtonState, Theme};
 
-use crate::dpi::LogicalSize;
-use crate::event_loop::EventLoop;
-use crate::monitor::MonitorHandle;
-use crate::window::{Window, WindowBuilder};
+use crate::{
+    dpi::LogicalSize,
+    event_loop::EventLoop,
+    monitor::MonitorHandle,
+    window::{Window, WindowBuilder},
+};
 
 use crate::platform_impl::{
-    EventLoop as LinuxEventLoop,
-    Window as LinuxWindow,
+    x11::{ffi::XVisualInfo, XConnection},
+    EventLoop as LinuxEventLoop, Window as LinuxWindow,
 };
-use crate::platform_impl::x11::XConnection;
-use crate::platform_impl::x11::ffi::XVisualInfo;
 
 // TODO: stupid hack so that glutin can do its work
 #[doc(hidden)]
 pub use crate::platform_impl::x11;
 
-pub use crate::platform_impl::XNotSupported;
-pub use crate::platform_impl::x11::util::WindowType as XWindowType;
+pub use crate::platform_impl::{x11::util::WindowType as XWindowType, XNotSupported};
 
 /// Theme for wayland client side decorations
 ///
@@ -97,11 +94,13 @@ impl Theme for WaylandThemeObject {
 pub trait EventLoopExtUnix {
     /// Builds a new `EventLoops` that is forced to use X11.
     fn new_x11() -> Result<Self, XNotSupported>
-        where Self: Sized;
+    where
+        Self: Sized;
 
     /// Builds a new `EventLoop` that is forced to use Wayland.
     fn new_wayland() -> Self
-        where Self: Sized;
+    where
+        Self: Sized;
 
     /// True if the `EventLoop` uses Wayland.
     fn is_wayland(&self) -> bool;
@@ -123,12 +122,12 @@ pub trait EventLoopExtUnix {
 impl<T> EventLoopExtUnix for EventLoop<T> {
     #[inline]
     fn new_x11() -> Result<Self, XNotSupported> {
-        LinuxEventLoop::new_x11().map(|ev|
+        LinuxEventLoop::new_x11().map(|ev| {
             EventLoop {
                 event_loop: ev,
                 _marker: ::std::marker::PhantomData,
             }
-        )
+        })
     }
 
     #[inline]
@@ -136,7 +135,7 @@ impl<T> EventLoopExtUnix for EventLoop<T> {
         EventLoop {
             event_loop: match LinuxEventLoop::new_wayland() {
                 Ok(e) => e,
-                Err(_) => panic!()      // TODO: propagate
+                Err(_) => panic!(), // TODO: propagate
             },
             _marker: ::std::marker::PhantomData,
         }
@@ -157,7 +156,7 @@ impl<T> EventLoopExtUnix for EventLoop<T> {
     fn xlib_xconnection(&self) -> Option<Arc<XConnection>> {
         match self.event_loop {
             LinuxEventLoop::X(ref e) => Some(e.x_connection().clone()),
-            _ => None
+            _ => None,
         }
     }
 
@@ -165,7 +164,7 @@ impl<T> EventLoopExtUnix for EventLoop<T> {
     fn wayland_display(&self) -> Option<*mut raw::c_void> {
         match self.event_loop {
             LinuxEventLoop::Wayland(ref e) => Some(e.display().get_display_ptr() as *mut _),
-            _ => None
+            _ => None,
         }
     }
 }
@@ -231,7 +230,7 @@ impl WindowExtUnix for Window {
     fn xlib_window(&self) -> Option<raw::c_ulong> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xlib_window()),
-            _ => None
+            _ => None,
         }
     }
 
@@ -239,7 +238,7 @@ impl WindowExtUnix for Window {
     fn xlib_display(&self) -> Option<*mut raw::c_void> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xlib_display()),
-            _ => None
+            _ => None,
         }
     }
 
@@ -247,7 +246,7 @@ impl WindowExtUnix for Window {
     fn xlib_screen_id(&self) -> Option<raw::c_int> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xlib_screen_id()),
-            _ => None
+            _ => None,
         }
     }
 
@@ -256,7 +255,7 @@ impl WindowExtUnix for Window {
     fn xlib_xconnection(&self) -> Option<Arc<XConnection>> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xlib_xconnection()),
-            _ => None
+            _ => None,
         }
     }
 
@@ -264,7 +263,7 @@ impl WindowExtUnix for Window {
     fn xcb_connection(&self) -> Option<*mut raw::c_void> {
         match self.window {
             LinuxWindow::X(ref w) => Some(w.xcb_connection()),
-            _ => None
+            _ => None,
         }
     }
 
@@ -279,7 +278,7 @@ impl WindowExtUnix for Window {
     fn wayland_surface(&self) -> Option<*mut raw::c_void> {
         match self.window {
             LinuxWindow::Wayland(ref w) => Some(w.surface().as_ref().c_ptr() as *mut _),
-            _ => None
+            _ => None,
         }
     }
 
@@ -287,7 +286,7 @@ impl WindowExtUnix for Window {
     fn wayland_display(&self) -> Option<*mut raw::c_void> {
         match self.window {
             LinuxWindow::Wayland(ref w) => Some(w.display().as_ref().c_ptr() as *mut _),
-            _ => None
+            _ => None,
         }
     }
 
@@ -295,7 +294,7 @@ impl WindowExtUnix for Window {
     fn set_wayland_theme(&self, theme: WaylandTheme) {
         match self.window {
             LinuxWindow::Wayland(ref w) => w.set_theme(WaylandThemeObject(theme)),
-            _ => {}
+            _ => {},
         }
     }
 
@@ -334,9 +333,8 @@ pub trait WindowBuilderExtUnix {
 impl WindowBuilderExtUnix for WindowBuilder {
     #[inline]
     fn with_x11_visual<T>(mut self, visual_infos: *const T) -> WindowBuilder {
-        self.platform_specific.visual_infos = Some(
-            unsafe { ptr::read(visual_infos as *const XVisualInfo) }
-        );
+        self.platform_specific.visual_infos =
+            Some(unsafe { ptr::read(visual_infos as *const XVisualInfo) });
         self
     }
 

src/platform/windows.rs

@@ -5,17 +5,21 @@ use std::os::raw::c_void;
 use libc;
 use winapi::shared::windef::HWND;
 
-use crate::event::DeviceId;
-use crate::monitor::MonitorHandle;
-use crate::event_loop::EventLoop;
-use crate::window::{Icon, Window, WindowBuilder};
-use crate::platform_impl::EventLoop as WindowsEventLoop;
+use crate::{
+    event::DeviceId,
+    event_loop::EventLoop,
+    monitor::MonitorHandle,
+    platform_impl::EventLoop as WindowsEventLoop,
+    window::{Icon, Window, WindowBuilder},
+};
 
 /// Additional methods on `EventLoop` that are specific to Windows.
 pub trait EventLoopExtWindows {
     /// By default, winit on Windows will attempt to enable process-wide DPI awareness. If that's
     /// undesirable, you can create an `EventLoop` using this function instead.
-    fn new_dpi_unaware() -> Self where Self: Sized;
+    fn new_dpi_unaware() -> Self
+    where
+        Self: Sized;
 }
 
 impl<T> EventLoopExtWindows for EventLoop<T> {

src/platform_impl/android/ffi.rs

@@ -9,26 +9,26 @@ use std::os::raw;
 #[link(name = "android")]
 #[link(name = "EGL")]
 #[link(name = "GLESv2")]
-extern {}
+extern "C" {}
 
 /**
- * asset_manager.h
- */
+ ** asset_manager.h
+ **/
 pub type AAssetManager = raw::c_void;
 
 /**
- * native_window.h
- */
+ ** native_window.h
+ **/
 pub type ANativeWindow = raw::c_void;
 
-extern {
+extern "C" {
     pub fn ANativeWindow_getHeight(window: *const ANativeWindow) -> libc::int32_t;
     pub fn ANativeWindow_getWidth(window: *const ANativeWindow) -> libc::int32_t;
 }
 
 /**
- * native_activity.h
- */
+ ** native_activity.h
+ **/
 pub type JavaVM = ();
 pub type JNIEnv = ();
 pub type jobject = *const libc::c_void;
@@ -52,43 +52,56 @@ pub struct ANativeActivity {
 
 #[repr(C)]
 pub struct ANativeActivityCallbacks {
-    pub onStart: extern fn(*mut ANativeActivity),
-    pub onResume: extern fn(*mut ANativeActivity),
-    pub onSaveInstanceState: extern fn(*mut ANativeActivity, *mut libc::size_t),
-    pub onPause: extern fn(*mut ANativeActivity),
-    pub onStop: extern fn(*mut ANativeActivity),
-    pub onDestroy: extern fn(*mut ANativeActivity),
-    pub onWindowFocusChanged: extern fn(*mut ANativeActivity, libc::c_int),
-    pub onNativeWindowCreated: extern fn(*mut ANativeActivity, *const ANativeWindow),
-    pub onNativeWindowResized: extern fn(*mut ANativeActivity, *const ANativeWindow),
-    pub onNativeWindowRedrawNeeded: extern fn(*mut ANativeActivity, *const ANativeWindow),
-    pub onNativeWindowDestroyed: extern fn(*mut ANativeActivity, *const ANativeWindow),
-    pub onInputQueueCreated: extern fn(*mut ANativeActivity, *mut AInputQueue),
-    pub onInputQueueDestroyed: extern fn(*mut ANativeActivity, *mut AInputQueue),
-    pub onContentRectChanged: extern fn(*mut ANativeActivity, *const ARect),
-    pub onConfigurationChanged: extern fn(*mut ANativeActivity),
-    pub onLowMemory: extern fn(*mut ANativeActivity),
+    pub onStart: extern "C" fn(*mut ANativeActivity),
+    pub onResume: extern "C" fn(*mut ANativeActivity),
+    pub onSaveInstanceState: extern "C" fn(*mut ANativeActivity, *mut libc::size_t),
+    pub onPause: extern "C" fn(*mut ANativeActivity),
+    pub onStop: extern "C" fn(*mut ANativeActivity),
+    pub onDestroy: extern "C" fn(*mut ANativeActivity),
+    pub onWindowFocusChanged: extern "C" fn(*mut ANativeActivity, libc::c_int),
+    pub onNativeWindowCreated: extern "C" fn(*mut ANativeActivity, *const ANativeWindow),
+    pub onNativeWindowResized: extern "C" fn(*mut ANativeActivity, *const ANativeWindow),
+    pub onNativeWindowRedrawNeeded: extern "C" fn(*mut ANativeActivity, *const ANativeWindow),
+    pub onNativeWindowDestroyed: extern "C" fn(*mut ANativeActivity, *const ANativeWindow),
+    pub onInputQueueCreated: extern "C" fn(*mut ANativeActivity, *mut AInputQueue),
+    pub onInputQueueDestroyed: extern "C" fn(*mut ANativeActivity, *mut AInputQueue),
+    pub onContentRectChanged: extern "C" fn(*mut ANativeActivity, *const ARect),
+    pub onConfigurationChanged: extern "C" fn(*mut ANativeActivity),
+    pub onLowMemory: extern "C" fn(*mut ANativeActivity),
 }
 
 /**
- * looper.h
- */
+ ** looper.h
+ **/
 pub type ALooper = ();
 
 #[link(name = "android")]
-extern {
+extern "C" {
     pub fn ALooper_forThread() -> *const ALooper;
     pub fn ALooper_acquire(looper: *const ALooper);
     pub fn ALooper_release(looper: *const ALooper);
     pub fn ALooper_prepare(opts: libc::c_int) -> *const ALooper;
-    pub fn ALooper_pollOnce(timeoutMillis: libc::c_int, outFd: *mut libc::c_int,
-        outEvents: *mut libc::c_int, outData: *mut *mut libc::c_void) -> libc::c_int;
-    pub fn ALooper_pollAll(timeoutMillis: libc::c_int, outFd: *mut libc::c_int,
-        outEvents: *mut libc::c_int, outData: *mut *mut libc::c_void) -> libc::c_int;
+    pub fn ALooper_pollOnce(
+        timeoutMillis: libc::c_int,
+        outFd: *mut libc::c_int,
+        outEvents: *mut libc::c_int,
+        outData: *mut *mut libc::c_void,
+    ) -> libc::c_int;
+    pub fn ALooper_pollAll(
+        timeoutMillis: libc::c_int,
+        outFd: *mut libc::c_int,
+        outEvents: *mut libc::c_int,
+        outData: *mut *mut libc::c_void,
+    ) -> libc::c_int;
     pub fn ALooper_wake(looper: *const ALooper);
-    pub fn ALooper_addFd(looper: *const ALooper, fd: libc::c_int, ident: libc::c_int,
-        events: libc::c_int, callback: ALooper_callbackFunc, data: *mut libc::c_void)
-        -> libc::c_int;
+    pub fn ALooper_addFd(
+        looper: *const ALooper,
+        fd: libc::c_int,
+        ident: libc::c_int,
+        events: libc::c_int,
+        callback: ALooper_callbackFunc,
+        data: *mut libc::c_void,
+    ) -> libc::c_int;
     pub fn ALooper_removeFd(looper: *const ALooper, fd: libc::c_int) -> libc::c_int;
 }
 
@@ -105,4 +118,5 @@ pub const ALOOPER_EVENT_ERROR: libc::c_int = 1 << 2;
 pub const ALOOPER_EVENT_HANGUP: libc::c_int = 1 << 3;
 pub const ALOOPER_EVENT_INVALID: libc::c_int = 1 << 4;
 
-pub type ALooper_callbackFunc = extern fn(libc::c_int, libc::c_int, *mut libc::c_void) -> libc::c_int;
+pub type ALooper_callbackFunc =
+    extern "C" fn(libc::c_int, libc::c_int, *mut libc::c_void) -> libc::c_int;

src/platform_impl/android/mod.rs

@@ -4,28 +4,22 @@ extern crate android_glue;
 
 mod ffi;
 
-use std::cell::RefCell;
-use std::collections::VecDeque;
-use std::fmt;
-use std::os::raw::c_void;
-use std::sync::mpsc::{Receiver, channel};
+use std::{
+    cell::RefCell,
+    collections::VecDeque,
+    fmt,
+    os::raw::c_void,
+    sync::mpsc::{channel, Receiver},
+};
 
-use {
-    crate::CreationError,
-    crate::Event,
-    crate::LogicalPosition,
-    crate::LogicalSize,
-    crate::CursorIcon,
-    crate::PhysicalPosition,
-    crate::PhysicalSize,
-    crate::WindowAttributes,
-    crate::WindowEvent,
-    crate::WindowId as RootWindowId,
+use crate::{
+    error::{ExternalError, NotSupportedError},
+    events::{Touch, TouchPhase},
+    window::MonitorHandle as RootMonitorHandle,
+    CreationError, CursorIcon, Event, LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize,
+    WindowAttributes, WindowEvent, WindowId as RootWindowId,
 };
 use CreationError::OsError;
-use crate::error::{ExternalError, NotSupportedError};
-use crate::events::{Touch, TouchPhase};
-use crate::window::MonitorHandle as RootMonitorHandle;
 
 pub type OsError = std::io::Error;
 
@@ -60,10 +54,11 @@ impl EventLoop {
     }
 
     pub fn poll_events<F>(&mut self, mut callback: F)
-        where F: FnMut(::Event)
+    where
+        F: FnMut(::Event),
     {
         while let Ok(event) = self.event_rx.try_recv() {
-            let e = match event{
+            let e = match event {
                 android_glue::Event::EventMotion(motion) => {
                     let dpi_factor = MonitorHandle.hidpi_factor();
                     let location = LogicalPosition::from_physical(
@@ -99,8 +94,7 @@ impl EventLoop {
                     }
                     Some(Event::Suspended(true))
                 },
-                android_glue::Event::WindowResized |
-                android_glue::Event::ConfigChanged => {
+                android_glue::Event::WindowResized | android_glue::Event::ConfigChanged => {
                     // Activity Orientation changed or resized.
                     let native_window = unsafe { android_glue::native_window() };
                     if native_window.is_null() {
@@ -121,19 +115,15 @@ impl EventLoop {
                         window_id: RootWindowId(WindowId),
                         event: WindowEvent::Redraw,
                     })
-                }
-                android_glue::Event::Wake => {
-                    Some(Event::Awakened)
-                }
-                _ => {
-                    None
-                }
+                },
+                android_glue::Event::Wake => Some(Event::Awakened),
+                _ => None,
             };
 
             if let Some(event) = e {
                 callback(event);
             }
-        };
+        }
     }
 
     pub fn set_suspend_callback(&self, cb: Option<Box<dyn Fn(bool) -> ()>>) {
@@ -141,7 +131,8 @@ impl EventLoop {
     }
 
     pub fn run_forever<F>(&mut self, mut callback: F)
-        where F: FnMut(::Event) -> ::ControlFlow,
+    where
+        F: FnMut(::Event) -> ::ControlFlow,
     {
         // Yeah that's a very bad implementation.
         loop {
@@ -229,7 +220,8 @@ impl MonitorHandle {
             (
                 ffi::ANativeWindow_getWidth(window) as f64,
                 ffi::ANativeWindow_getHeight(window) as f64,
-            ).into()
+            )
+                .into()
         }
     }
 
@@ -251,10 +243,11 @@ pub struct PlatformSpecificWindowBuilderAttributes;
 pub struct PlatformSpecificHeadlessBuilderAttributes;
 
 impl Window {
-    pub fn new(_: &EventLoop, win_attribs: WindowAttributes,
-               _: PlatformSpecificWindowBuilderAttributes)
-               -> Result<Window, CreationError>
-    {
+    pub fn new(
+        _: &EventLoop,
+        win_attribs: WindowAttributes,
+        _: PlatformSpecificWindowBuilderAttributes,
+    ) -> Result<Window, CreationError> {
         let native_window = unsafe { android_glue::native_window() };
         if native_window.is_null() {
             return Err(OsError(format!("Android's native window is null")));
@@ -406,7 +399,9 @@ impl Window {
 
     #[inline]
     pub fn current_monitor(&self) -> RootMonitorHandle {
-        RootMonitorHandle { inner: MonitorHandle }
+        RootMonitorHandle {
+            inner: MonitorHandle,
+        }
     }
 
     #[inline]

src/platform_impl/emscripten/ffi.rs

@@ -1,8 +1,8 @@
 #![allow(dead_code, non_camel_case_types, non_snake_case)]
 
-use std::os::raw::{c_int, c_char, c_void, c_ulong, c_double, c_long, c_ushort};
 #[cfg(test)]
 use std::mem;
+use std::os::raw::{c_char, c_double, c_int, c_long, c_ulong, c_ushort, c_void};
 
 pub type EM_BOOL = c_int;
 pub type EM_UTF8 = c_char;
@@ -71,30 +71,45 @@ pub const DOM_KEY_LOCATION_NUMPAD: c_ulong = 0x03;
 
 pub type em_callback_func = Option<unsafe extern "C" fn()>;
 
-pub type em_key_callback_func = Option<unsafe extern "C" fn(
+pub type em_key_callback_func = Option<
+    unsafe extern "C" fn(
         eventType: c_int,
         keyEvent: *const EmscriptenKeyboardEvent,
-    userData: *mut c_void) -> EM_BOOL>;
+        userData: *mut c_void,
+    ) -> EM_BOOL,
+>;
 
-pub type em_mouse_callback_func = Option<unsafe extern "C" fn(
+pub type em_mouse_callback_func = Option<
+    unsafe extern "C" fn(
         eventType: c_int,
         mouseEvent: *const EmscriptenMouseEvent,
-    userData: *mut c_void) -> EM_BOOL>;
+        userData: *mut c_void,
+    ) -> EM_BOOL,
+>;
 
-pub type em_pointerlockchange_callback_func = Option<unsafe extern "C" fn(
+pub type em_pointerlockchange_callback_func = Option<
+    unsafe extern "C" fn(
         eventType: c_int,
         pointerlockChangeEvent: *const EmscriptenPointerlockChangeEvent,
-    userData: *mut c_void) -> EM_BOOL>;
+        userData: *mut c_void,
+    ) -> EM_BOOL,
+>;
 
-pub type em_fullscreenchange_callback_func = Option<unsafe extern "C" fn(
+pub type em_fullscreenchange_callback_func = Option<
+    unsafe extern "C" fn(
         eventType: c_int,
         fullscreenChangeEvent: *const EmscriptenFullscreenChangeEvent,
-    userData: *mut c_void) -> EM_BOOL>;
+        userData: *mut c_void,
+    ) -> EM_BOOL,
+>;
 
-pub type em_touch_callback_func = Option<unsafe extern "C" fn(
+pub type em_touch_callback_func = Option<
+    unsafe extern "C" fn(
         eventType: c_int,
         touchEvent: *const EmscriptenTouchEvent,
-    userData: *mut c_void) -> EM_BOOL>;
+        userData: *mut c_void,
+    ) -> EM_BOOL,
+>;
 
 #[repr(C)]
 pub struct EmscriptenFullscreenChangeEvent {
@@ -136,7 +151,9 @@ fn bindgen_test_layout_EmscriptenKeyboardEvent() {
     assert_eq!(mem::align_of::<EmscriptenKeyboardEvent>(), 8usize);
 }
 impl Clone for EmscriptenKeyboardEvent {
-    fn clone(&self) -> Self { *self }
+    fn clone(&self) -> Self {
+        *self
+    }
 }
 
 #[repr(C)]
@@ -219,96 +236,128 @@ fn bindgen_test_layout_EmscriptenPointerlockChangeEvent() {
 }
 
 extern "C" {
-    pub fn emscripten_set_canvas_size(
-        width: c_int, height: c_int)
-        -> EMSCRIPTEN_RESULT;
+    pub fn emscripten_set_canvas_size(width: c_int, height: c_int) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_get_canvas_size(
-        width: *mut c_int, height: *mut c_int,
-        is_fullscreen: *mut c_int)
-        -> EMSCRIPTEN_RESULT;
+        width: *mut c_int,
+        height: *mut c_int,
+        is_fullscreen: *mut c_int,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_element_css_size(
-        target: *const c_char, width: c_double,
-        height: c_double) -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        width: c_double,
+        height: c_double,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_get_element_css_size(
-        target: *const c_char, width: *mut c_double,
-        height: *mut c_double) -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        width: *mut c_double,
+        height: *mut c_double,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_request_pointerlock(
-        target: *const c_char, deferUntilInEventHandler: EM_BOOL)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        deferUntilInEventHandler: EM_BOOL,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_exit_pointerlock() -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_request_fullscreen(
-        target: *const c_char, deferUntilInEventHandler: EM_BOOL)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        deferUntilInEventHandler: EM_BOOL,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_exit_fullscreen() -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_keydown_callback(
-        target: *const c_char, userData: *mut c_void,
-        useCapture: EM_BOOL, callback: em_key_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        userData: *mut c_void,
+        useCapture: EM_BOOL,
+        callback: em_key_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_keyup_callback(
-        target: *const c_char, userData: *mut c_void,
-        useCapture: EM_BOOL, callback: em_key_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        userData: *mut c_void,
+        useCapture: EM_BOOL,
+        callback: em_key_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_mousemove_callback(
-        target: *const c_char, user_data: *mut c_void,
-        use_capture: EM_BOOL, callback: em_mouse_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        user_data: *mut c_void,
+        use_capture: EM_BOOL,
+        callback: em_mouse_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_mousedown_callback(
-        target: *const c_char, user_data: *mut c_void,
-        use_capture: EM_BOOL, callback: em_mouse_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        user_data: *mut c_void,
+        use_capture: EM_BOOL,
+        callback: em_mouse_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_mouseup_callback(
-        target: *const c_char, user_data: *mut c_void,
-        use_capture: EM_BOOL, callback: em_mouse_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        user_data: *mut c_void,
+        use_capture: EM_BOOL,
+        callback: em_mouse_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_hide_mouse();
 
     pub fn emscripten_get_device_pixel_ratio() -> f64;
 
     pub fn emscripten_set_pointerlockchange_callback(
-        target: *const c_char, userData: *mut c_void, useCapture: EM_BOOL,
-        callback: em_pointerlockchange_callback_func) -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        userData: *mut c_void,
+        useCapture: EM_BOOL,
+        callback: em_pointerlockchange_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_fullscreenchange_callback(
-        target: *const c_char, userData: *mut c_void, useCapture: EM_BOOL,
-        callback: em_fullscreenchange_callback_func) -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        userData: *mut c_void,
+        useCapture: EM_BOOL,
+        callback: em_fullscreenchange_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_asm_const(code: *const c_char);
 
     pub fn emscripten_set_main_loop(
-        func: em_callback_func, fps: c_int, simulate_infinite_loop: EM_BOOL);
+        func: em_callback_func,
+        fps: c_int,
+        simulate_infinite_loop: EM_BOOL,
+    );
 
     pub fn emscripten_cancel_main_loop();
 
     pub fn emscripten_set_touchstart_callback(
-        target: *const c_char, userData: *mut c_void,
-        useCapture: c_int, callback: em_touch_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        userData: *mut c_void,
+        useCapture: c_int,
+        callback: em_touch_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_touchend_callback(
-        target: *const c_char, userData: *mut c_void,
-        useCapture: c_int, callback: em_touch_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        userData: *mut c_void,
+        useCapture: c_int,
+        callback: em_touch_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_touchmove_callback(
-        target: *const c_char, userData: *mut c_void,
-        useCapture: c_int, callback: em_touch_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        userData: *mut c_void,
+        useCapture: c_int,
+        callback: em_touch_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 
     pub fn emscripten_set_touchcancel_callback(
-        target: *const c_char, userData: *mut c_void,
-        useCapture: c_int, callback: em_touch_callback_func)
-        -> EMSCRIPTEN_RESULT;
+        target: *const c_char,
+        userData: *mut c_void,
+        useCapture: c_int,
+        callback: em_touch_callback_func,
+    ) -> EMSCRIPTEN_RESULT;
 }

src/platform_impl/emscripten/mod.rs

@@ -2,16 +2,23 @@
 
 mod ffi;
 
-use std::{mem, ptr, str};
-use std::cell::RefCell;
-use std::collections::VecDeque;
-use std::os::raw::{c_char, c_void, c_double, c_ulong, c_int};
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::{Mutex, Arc};
+use std::{
+    cell::RefCell,
+    collections::VecDeque,
+    mem,
+    os::raw::{c_char, c_double, c_int, c_ulong, c_void},
+    ptr, str,
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        Arc, Mutex,
+    },
+};
 
-use crate::dpi::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize};
-use crate::error::{ExternalError, NotSupportedError};
-use crate::window::MonitorHandle as RootMonitorHandle;
+use crate::{
+    dpi::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize},
+    error::{ExternalError, NotSupportedError},
+    window::MonitorHandle as RootMonitorHandle,
+};
 
 const DOCUMENT_NAME: &'static str = "#document\0";
 
@@ -68,14 +75,22 @@ impl MonitorHandle {
 thread_local!(static MAIN_LOOP_CALLBACK: RefCell<*mut c_void> = RefCell::new(ptr::null_mut()));
 
 // Used to assign a callback to emscripten main loop
-pub fn set_main_loop_callback<F>(callback : F) where F : FnMut() {
+pub fn set_main_loop_callback<F>(callback: F)
+where
+    F: FnMut(),
+{
     MAIN_LOOP_CALLBACK.with(|log| {
         *log.borrow_mut() = &callback as *const _ as *mut c_void;
     });
 
-    unsafe { ffi::emscripten_set_main_loop(Some(wrapper::<F>), 0, 1); }
+    unsafe {
+        ffi::emscripten_set_main_loop(Some(wrapper::<F>), 0, 1);
+    }
 
-    unsafe extern "C" fn wrapper<F>() where F : FnMut() {
+    unsafe extern "C" fn wrapper<F>()
+    where
+        F: FnMut(),
+    {
         MAIN_LOOP_CALLBACK.with(|z| {
             let closure = *z.borrow_mut() as *mut F;
             (*closure)();
@@ -128,7 +143,8 @@ impl EventLoop {
     }
 
     pub fn poll_events<F>(&self, mut callback: F)
-        where F: FnMut(::Event)
+    where
+        F: FnMut(::Event),
     {
         let ref mut window = *self.window.lock().unwrap();
         if let &mut Some(ref mut window) = window {
@@ -139,17 +155,22 @@ impl EventLoop {
     }
 
     pub fn run_forever<F>(&self, mut callback: F)
-        where F: FnMut(::Event) -> ::ControlFlow
+    where
+        F: FnMut(::Event) -> ::ControlFlow,
     {
         self.interrupted.store(false, Ordering::Relaxed);
 
         // TODO: handle control flow
 
         set_main_loop_callback(|| {
-            self.poll_events(|e| { callback(e); });
+            self.poll_events(|e| {
+                callback(e);
+            });
             ::std::thread::sleep(::std::time::Duration::from_millis(5));
             if self.interrupted.load(Ordering::Relaxed) {
-                unsafe { ffi::emscripten_cancel_main_loop(); }
+                unsafe {
+                    ffi::emscripten_cancel_main_loop();
+                }
             }
         });
     }
@@ -197,8 +218,8 @@ fn show_mouse() {
 extern "C" fn mouse_callback(
     event_type: c_int,
     event: *const ffi::EmscriptenMouseEvent,
-    event_queue: *mut c_void) -> ffi::EM_BOOL
-{
+    event_queue: *mut c_void,
+) -> ffi::EM_BOOL {
     unsafe {
         let queue: &Mutex<VecDeque<::Event>> = mem::transmute(event_queue);
 
@@ -221,18 +242,18 @@ extern "C" fn mouse_callback(
                     event: ::WindowEvent::CursorMoved {
                         device_id: ::DeviceId(DeviceId),
                         position,
-                        modifiers: modifiers,
-                    }
+                        modifiers,
+                    },
                 });
                 queue.lock().unwrap().push_back(::Event::DeviceEvent {
                     device_id: ::DeviceId(DeviceId),
                     event: ::DeviceEvent::MouseMotion {
                         delta: ((*event).movementX as f64, (*event).movementY as f64),
-                    }
+                    },
                 });
             },
-            mouse_input @ ffi::EMSCRIPTEN_EVENT_MOUSEDOWN |
-            mouse_input @ ffi::EMSCRIPTEN_EVENT_MOUSEUP => {
+            mouse_input @ ffi::EMSCRIPTEN_EVENT_MOUSEDOWN
+            | mouse_input @ ffi::EMSCRIPTEN_EVENT_MOUSEUP => {
                 let button = match (*event).button {
                     0 => ::MouseButton::Left,
                     1 => ::MouseButton::Middle,
@@ -248,14 +269,13 @@ extern "C" fn mouse_callback(
                     window_id: ::WindowId(WindowId(0)),
                     event: ::WindowEvent::MouseInput {
                         device_id: ::DeviceId(DeviceId),
-                        state: state,
-                        button: button,
-                        modifiers: modifiers,
-                    }
+                        state,
+                        button,
+                        modifiers,
+                    },
                 })
             },
-            _ => {
-            }
+            _ => {},
         }
     }
     ffi::EM_FALSE
@@ -264,8 +284,8 @@ extern "C" fn mouse_callback(
 extern "C" fn keyboard_callback(
     event_type: c_int,
     event: *const ffi::EmscriptenKeyboardEvent,
-    event_queue: *mut c_void) -> ffi::EM_BOOL
-{
+    event_queue: *mut c_void,
+) -> ffi::EM_BOOL {
     unsafe {
         let queue: &Mutex<VecDeque<::Event>> = mem::transmute(event_queue);
 
@@ -305,18 +325,17 @@ extern "C" fn keyboard_callback(
                     },
                 });
             },
-            _ => {
-            }
+            _ => {},
         }
     }
     ffi::EM_FALSE
 }
 
-extern fn touch_callback(
+extern "C" fn touch_callback(
     event_type: c_int,
     event: *const ffi::EmscriptenTouchEvent,
-    event_queue: *mut c_void) -> ffi::EM_BOOL
-{
+    event_queue: *mut c_void,
+) -> ffi::EM_BOOL {
     unsafe {
         let queue: &Mutex<VecDeque<::Event>> = mem::transmute(event_queue);
 
@@ -356,8 +375,8 @@ extern fn touch_callback(
 unsafe extern "C" fn fullscreen_callback(
     _eventType: c_int,
     _fullscreenChangeEvent: *const ffi::EmscriptenFullscreenChangeEvent,
-    _userData: *mut c_void) -> ffi::EM_BOOL
-{
+    _userData: *mut c_void,
+) -> ffi::EM_BOOL {
     ffi::emscripten_request_fullscreen(ptr::null(), ffi::EM_TRUE);
     ffi::EM_FALSE
 }
@@ -367,8 +386,8 @@ unsafe extern "C" fn fullscreen_callback(
 unsafe extern "C" fn pointerlockchange_callback(
     _eventType: c_int,
     _pointerlockChangeEvent: *const ffi::EmscriptenPointerlockChangeEvent,
-    _userData: *mut c_void) -> ffi::EM_BOOL
-{
+    _userData: *mut c_void,
+) -> ffi::EM_BOOL {
     ffi::emscripten_request_pointerlock(ptr::null(), ffi::EM_TRUE);
     ffi::EM_FALSE
 }
@@ -381,12 +400,15 @@ fn em_try(res: ffi::EMSCRIPTEN_RESULT) -> Result<(), String> {
 }
 
 impl Window {
-    pub fn new(event_loop: &EventLoop, attribs: ::WindowAttributes,
-               _pl_attribs: PlatformSpecificWindowBuilderAttributes)
-        -> Result<Window, ::CreationError>
-    {
+    pub fn new(
+        event_loop: &EventLoop,
+        attribs: ::WindowAttributes,
+        _pl_attribs: PlatformSpecificWindowBuilderAttributes,
+    ) -> Result<Window, ::CreationError> {
         if event_loop.window.lock().unwrap().is_some() {
-            return Err(::CreationError::OsError("Cannot create another window".to_owned()));
+            return Err(::CreationError::OsError(
+                "Cannot create another window".to_owned(),
+            ));
         }
 
         let w = Window2 {
@@ -400,34 +422,86 @@ impl Window {
             window: Arc::new(w),
         };
 
-
         // TODO: set up more event callbacks
         unsafe {
-            em_try(ffi::emscripten_set_mousemove_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(mouse_callback)))
+            em_try(ffi::emscripten_set_mousemove_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(mouse_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
-            em_try(ffi::emscripten_set_mousedown_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(mouse_callback)))
+            em_try(ffi::emscripten_set_mousedown_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(mouse_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
-            em_try(ffi::emscripten_set_mouseup_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(mouse_callback)))
+            em_try(ffi::emscripten_set_mouseup_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(mouse_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
-            em_try(ffi::emscripten_set_keydown_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(keyboard_callback)))
+            em_try(ffi::emscripten_set_keydown_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(keyboard_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
-            em_try(ffi::emscripten_set_keyup_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(keyboard_callback)))
+            em_try(ffi::emscripten_set_keyup_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(keyboard_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
-            em_try(ffi::emscripten_set_touchstart_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(touch_callback)))
+            em_try(ffi::emscripten_set_touchstart_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(touch_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
-            em_try(ffi::emscripten_set_touchend_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(touch_callback)))
+            em_try(ffi::emscripten_set_touchend_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(touch_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
-            em_try(ffi::emscripten_set_touchmove_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(touch_callback)))
+            em_try(ffi::emscripten_set_touchmove_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(touch_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
-            em_try(ffi::emscripten_set_touchcancel_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(touch_callback)))
+            em_try(ffi::emscripten_set_touchcancel_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                mem::transmute(&*window.window.events),
+                ffi::EM_FALSE,
+                Some(touch_callback),
+            ))
             .map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
         }
 
         if attribs.fullscreen.is_some() {
             unsafe {
-                em_try(ffi::emscripten_request_fullscreen(ptr::null(), ffi::EM_TRUE))
+                em_try(ffi::emscripten_request_fullscreen(
+                    ptr::null(),
+                    ffi::EM_TRUE,
+                ))
                 .map_err(|e| ::CreationError::OsError(e))?;
-                em_try(ffi::emscripten_set_fullscreenchange_callback(ptr::null(), 0 as *mut c_void, ffi::EM_FALSE, Some(fullscreen_callback)))
+                em_try(ffi::emscripten_set_fullscreenchange_callback(
+                    ptr::null(),
+                    0 as *mut c_void,
+                    ffi::EM_FALSE,
+                    Some(fullscreen_callback),
+                ))
                 .map_err(|e| ::CreationError::OsError(e))?;
             }
         } else if let Some(size) = attribs.inner_size {
@@ -444,8 +518,7 @@ impl Window {
     }
 
     #[inline]
-    pub fn set_title(&self, _title: &str) {
-    }
+    pub fn set_title(&self, _title: &str) {}
 
     #[inline]
     pub fn outer_position(&self) -> Option<LogicalPosition> {
@@ -458,8 +531,7 @@ impl Window {
     }
 
     #[inline]
-    pub fn set_outer_position(&self, _: LogicalPosition) {
-    }
+    pub fn set_outer_position(&self, _: LogicalPosition) {}
 
     #[inline]
     pub fn inner_size(&self) -> Option<LogicalSize> {
@@ -532,7 +604,9 @@ impl Window {
     #[inline]
     pub fn set_cursor_grab(&self, grab: bool) -> Result<(), ExternalError> {
         let mut grabbed_lock = self.window.cursor_grabbed.lock().unwrap();
-        if grab == *grabbed_lock { return Ok(()); }
+        if grab == *grabbed_lock {
+            return Ok(());
+        }
         unsafe {
             if grab {
                 em_try(ffi::emscripten_set_pointerlockchange_callback(
@@ -541,7 +615,10 @@ impl Window {
                     ffi::EM_FALSE,
                     Some(pointerlockchange_callback),
                 ))?;
-                em_try(ffi::emscripten_request_pointerlock(ptr::null(), ffi::EM_TRUE))?;
+                em_try(ffi::emscripten_request_pointerlock(
+                    ptr::null(),
+                    ffi::EM_TRUE,
+                ))?;
             } else {
                 em_try(ffi::emscripten_set_pointerlockchange_callback(
                     ptr::null(),
@@ -559,7 +636,9 @@ impl Window {
     #[inline]
     pub fn set_cursor_visible(&self, visible: bool) {
         let mut visible_lock = self.window.cursor_visible.lock().unwrap();
-        if visible == *visible_lock { return; }
+        if visible == *visible_lock {
+            return;
+        }
         if visible {
             show_mouse();
         } else {
@@ -615,7 +694,9 @@ impl Window {
 
     #[inline]
     pub fn current_monitor(&self) -> RootMonitorHandle {
-        RootMonitorHandle { inner: MonitorHandle }
+        RootMonitorHandle {
+            inner: MonitorHandle,
+        }
     }
 
     #[inline]
@@ -646,21 +727,37 @@ impl Drop for Window {
 
             // Exit fullscreen if on
             if self.window.is_fullscreen {
-                ffi::emscripten_set_fullscreenchange_callback(ptr::null(), 0 as *mut c_void, ffi::EM_FALSE, None);
+                ffi::emscripten_set_fullscreenchange_callback(
+                    ptr::null(),
+                    0 as *mut c_void,
+                    ffi::EM_FALSE,
+                    None,
+                );
                 ffi::emscripten_exit_fullscreen();
             }
 
             // Delete callbacks
-            ffi::emscripten_set_keydown_callback(DOCUMENT_NAME.as_ptr() as *const c_char, 0 as *mut c_void, ffi::EM_FALSE,None);
-            ffi::emscripten_set_keyup_callback(DOCUMENT_NAME.as_ptr() as *const c_char, 0 as *mut c_void, ffi::EM_FALSE,None);
+            ffi::emscripten_set_keydown_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                0 as *mut c_void,
+                ffi::EM_FALSE,
+                None,
+            );
+            ffi::emscripten_set_keyup_callback(
+                DOCUMENT_NAME.as_ptr() as *const c_char,
+                0 as *mut c_void,
+                ffi::EM_FALSE,
+                None,
+            );
         }
     }
 }
 
 fn error_to_str(code: ffi::EMSCRIPTEN_RESULT) -> &'static str {
     match code {
-        ffi::EMSCRIPTEN_RESULT_SUCCESS | ffi::EMSCRIPTEN_RESULT_DEFERRED
-            => "Internal error in the library (success detected as failure)",
+        ffi::EMSCRIPTEN_RESULT_SUCCESS | ffi::EMSCRIPTEN_RESULT_DEFERRED => {
+            "Internal error in the library (success detected as failure)"
+        },
 
         ffi::EMSCRIPTEN_RESULT_NOT_SUPPORTED => "Not supported",
         ffi::EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED => "Failed not deferred",
@@ -670,7 +767,7 @@ fn error_to_str(code: ffi::EMSCRIPTEN_RESULT) -> &'static str {
         ffi::EMSCRIPTEN_RESULT_FAILED => "Failed",
         ffi::EMSCRIPTEN_RESULT_NO_DATA => "No data",
 
-        _ => "Undocumented error"
+        _ => "Undocumented error",
     }
 }
 
@@ -679,7 +776,9 @@ fn key_translate(input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES]) ->
     let maybe_key = unsafe { str::from_utf8(mem::transmute::<_, &[u8]>(slice)) };
     let key = match maybe_key {
         Ok(key) => key,
-        Err(_) => { return 0; },
+        Err(_) => {
+            return 0;
+        },
     };
     if key.chars().count() == 1 {
         key.as_bytes()[0]
@@ -688,28 +787,35 @@ fn key_translate(input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES]) ->
     }
 }
 
-fn key_translate_virt(input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES],
-                      location: c_ulong) -> Option<::VirtualKeyCode>
-{
+fn key_translate_virt(
+    input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES],
+    location: c_ulong,
+) -> Option<::VirtualKeyCode> {
     let slice = &input[0..input.iter().take_while(|x| **x != 0).count()];
     let maybe_key = unsafe { str::from_utf8(mem::transmute::<_, &[u8]>(slice)) };
     let key = match maybe_key {
         Ok(key) => key,
-        Err(_) => { return None; },
+        Err(_) => {
+            return None;
+        },
     };
     use VirtualKeyCode::*;
     match key {
-        "Alt" => match location {
+        "Alt" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_LEFT => Some(LAlt),
                 ffi::DOM_KEY_LOCATION_RIGHT => Some(RAlt),
                 _ => None,
+            }
         },
         "AltGraph" => None,
         "CapsLock" => None,
-        "Control" => match location {
+        "Control" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_LEFT => Some(LControl),
                 ffi::DOM_KEY_LOCATION_RIGHT => Some(RControl),
                 _ => None,
+            }
         },
         "Fn" => None,
         "FnLock" => None,
@@ -717,18 +823,22 @@ fn key_translate_virt(input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES
         "Meta" => None,
         "NumLock" => Some(Numlock),
         "ScrollLock" => Some(Scroll),
-        "Shift" => match location {
+        "Shift" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_LEFT => Some(LShift),
                 ffi::DOM_KEY_LOCATION_RIGHT => Some(RShift),
                 _ => None,
+            }
         },
         "Super" => None,
         "Symbol" => None,
         "SymbolLock" => None,
 
-        "Enter" => match location {
+        "Enter" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(NumpadEnter),
                 _ => Some(Return),
+            }
         },
         "Tab" => Some(Tab),
         " " => Some(Space),
@@ -1053,45 +1163,65 @@ fn key_translate_virt(input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES
         "Divide" => Some(Divide),
         "Subtract" | "-" => Some(Subtract),
         "Separator" => None,
-        "0" => match location {
+        "0" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad0),
                 _ => Some(Key0),
+            }
         },
-        "1" => match location {
+        "1" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad1),
                 _ => Some(Key1),
+            }
         },
-        "2" => match location {
+        "2" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad2),
                 _ => Some(Key2),
+            }
         },
-        "3" => match location {
+        "3" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad3),
                 _ => Some(Key3),
+            }
         },
-        "4" => match location {
+        "4" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad4),
                 _ => Some(Key4),
+            }
         },
-        "5" => match location {
+        "5" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad5),
                 _ => Some(Key5),
+            }
         },
-        "6" => match location {
+        "6" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad6),
                 _ => Some(Key6),
+            }
         },
-        "7" => match location {
+        "7" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad7),
                 _ => Some(Key7),
+            }
         },
-        "8" => match location {
+        "8" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad8),
                 _ => Some(Key8),
+            }
         },
-        "9" => match location {
+        "9" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(Numpad9),
                 _ => Some(Key9),
+            }
         },
 
         "A" | "a" => Some(A),
@@ -1124,13 +1254,17 @@ fn key_translate_virt(input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES
         "'" => Some(Apostrophe),
         "\\" => Some(Backslash),
         ":" => Some(Colon),
-        "," => match location {
+        "," => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(NumpadComma),
                 _ => Some(Comma),
+            }
         },
-        "=" => match location {
+        "=" => {
+            match location {
                 ffi::DOM_KEY_LOCATION_NUMPAD => Some(NumpadEquals),
                 _ => Some(Equals),
+            }
         },
         "{" => Some(LBracket),
         "." => Some(Period),

src/platform_impl/ios/app_state.rs

@@ -1,26 +1,23 @@
-use std::{mem, ptr};
-use std::cell::{RefCell, RefMut};
-use std::mem::ManuallyDrop;
-use std::os::raw::c_void;
-use std::time::Instant;
+use std::{
+    cell::{RefCell, RefMut},
+    mem::{self, ManuallyDrop},
+    os::raw::c_void,
+    ptr,
+    time::Instant,
+};
 
-use crate::event::{Event, StartCause};
-use crate::event_loop::ControlFlow;
+use crate::{
+    event::{Event, StartCause},
+    event_loop::ControlFlow,
+};
 
-use crate::platform_impl::platform::event_loop::{EventHandler, Never};
-use crate::platform_impl::platform::ffi::{
-    id,
-    CFAbsoluteTimeGetCurrent,
-    CFRelease,
-    CFRunLoopAddTimer,
-    CFRunLoopGetMain,
-    CFRunLoopRef,
-    CFRunLoopTimerCreate,
-    CFRunLoopTimerInvalidate,
-    CFRunLoopTimerRef,
-    CFRunLoopTimerSetNextFireDate,
-    kCFRunLoopCommonModes,
-    NSUInteger,
+use crate::platform_impl::platform::{
+    event_loop::{EventHandler, Never},
+    ffi::{
+        id, kCFRunLoopCommonModes, CFAbsoluteTimeGetCurrent, CFRelease, CFRunLoopAddTimer,
+        CFRunLoopGetMain, CFRunLoopRef, CFRunLoopTimerCreate, CFRunLoopTimerInvalidate,
+        CFRunLoopTimerRef, CFRunLoopTimerSetNextFireDate, NSUInteger,
+    },
 };
 
 macro_rules! bug {
@@ -62,13 +59,19 @@ enum AppStateImpl {
 impl Drop for AppStateImpl {
     fn drop(&mut self) {
         match self {
-            &mut AppStateImpl::NotLaunched { ref mut queued_windows, .. } |
-            &mut AppStateImpl::Launching { ref mut queued_windows, .. } => unsafe {
+            &mut AppStateImpl::NotLaunched {
+                ref mut queued_windows,
+                ..
+            }
+            | &mut AppStateImpl::Launching {
+                ref mut queued_windows,
+                ..
+            } => unsafe {
                 for &mut window in queued_windows {
                     let () = msg_send![window, release];
                 }
-            }
-            _ => {}
+            },
+            _ => {},
         }
     }
 }
@@ -88,7 +91,9 @@ impl AppState {
         static mut APP_STATE: RefCell<Option<AppState>> = RefCell::new(None);
 
         if cfg!(debug_assertions) {
-            assert_main_thread!("bug in winit: `AppState::get_mut()` can only be called on the main thread");
+            assert_main_thread!(
+                "bug in winit: `AppState::get_mut()` can only be called on the main thread"
+            );
         }
 
         let mut guard = APP_STATE.borrow_mut();
@@ -108,9 +113,7 @@ impl AppState {
             }
             init_guard(&mut guard)
         }
-        RefMut::map(guard, |state| {
-            state.as_mut().unwrap()
-        })
+        RefMut::map(guard, |state| state.as_mut().unwrap())
     }
 
     // requires main thread and window is a UIWindow
@@ -118,16 +121,23 @@ impl AppState {
     pub unsafe fn set_key_window(window: id) {
         let mut this = AppState::get_mut();
         match &mut this.app_state {
-            &mut AppStateImpl::NotLaunched { ref mut queued_windows, .. } => {
+            &mut AppStateImpl::NotLaunched {
+                ref mut queued_windows,
+                ..
+            } => {
                 queued_windows.push(window);
                 msg_send![window, retain];
                 return;
-            }
+            },
             &mut AppStateImpl::ProcessingEvents { .. } => {},
             &mut AppStateImpl::InUserCallback { .. } => {},
-            &mut AppStateImpl::Terminated => panic!("Attempt to create a `Window` \
-                                                     after the app has terminated"),
-            app_state => unreachable!("unexpected state: {:#?}", app_state), // all other cases should be impossible
+            &mut AppStateImpl::Terminated => {
+                panic!(
+                    "Attempt to create a `Window` \
+                     after the app has terminated"
+                )
+            },
+            app_state => unreachable!("unexpected state: {:#?}", app_state), /* all other cases should be impossible */
         }
         drop(this);
         msg_send![window, makeKeyAndVisible]
@@ -144,15 +154,22 @@ impl AppState {
                 let windows = ptr::read(queued_windows);
                 let events = ptr::read(queued_events);
                 (windows, events)
-            }
-            _ => panic!("winit iOS expected the app to be in a `NotLaunched` \
-                            state, but was not - please file an issue"),
+            },
+            _ => {
+                panic!(
+                    "winit iOS expected the app to be in a `NotLaunched` \
+                     state, but was not - please file an issue"
+                )
+            },
         };
-        ptr::write(&mut this.app_state, AppStateImpl::Launching {
+        ptr::write(
+            &mut this.app_state,
+            AppStateImpl::Launching {
                 queued_windows,
                 queued_events,
                 queued_event_handler,
-        });
+            },
+        );
     }
 
     // requires main thread
@@ -163,10 +180,12 @@ impl AppState {
                 ref mut queued_windows,
                 ..
             } => mem::replace(queued_windows, Vec::new()),
-            _ => panic!(
+            _ => {
+                panic!(
                     "winit iOS expected the app to be in a `Launching` \
                      state, but was not - please file an issue"
-            ),
+                )
+            },
         };
         // have to drop RefMut because the window setup code below can trigger new events
         drop(this);
@@ -188,11 +207,11 @@ impl AppState {
                 let screen: id = msg_send![window, screen];
                 let () = msg_send![screen, retain];
                 let () = msg_send![window, setScreen:0 as id];
-                let () = msg_send![window, setScreen:screen];
+                let () = msg_send![window, setScreen: screen];
                 let () = msg_send![screen, release];
                 let controller: id = msg_send![window, rootViewController];
                 let () = msg_send![window, setRootViewController:ptr::null::<()>()];
-                let () = msg_send![window, setRootViewController:controller];
+                let () = msg_send![window, setRootViewController: controller];
                 let () = msg_send![window, makeKeyAndVisible];
             }
             let () = msg_send![window, release];
@@ -209,14 +228,21 @@ impl AppState {
                 let events = ptr::read(queued_events);
                 let event_handler = ptr::read(queued_event_handler);
                 (windows, events, event_handler)
-            }
-            _ => panic!("winit iOS expected the app to be in a `Launching` \
-                        state, but was not - please file an issue"),
+            },
+            _ => {
+                panic!(
+                    "winit iOS expected the app to be in a `Launching` \
+                     state, but was not - please file an issue"
+                )
+            },
         };
-        ptr::write(&mut this.app_state, AppStateImpl::ProcessingEvents {
+        ptr::write(
+            &mut this.app_state,
+            AppStateImpl::ProcessingEvents {
                 event_handler,
                 active_control_flow: ControlFlow::Poll,
-        });
+            },
+        );
         drop(this);
 
         let events = std::iter::once(Event::NewEvents(StartCause::Init)).chain(events);
@@ -238,55 +264,65 @@ impl AppState {
     // AppState::did_finish_launching handles the special transition `Init`
     pub unsafe fn handle_wakeup_transition() {
         let mut this = AppState::get_mut();
-        let event = match this.control_flow {
+        let event =
+            match this.control_flow {
                 ControlFlow::Poll => {
                     let event_handler = match &mut this.app_state {
-                    &mut AppStateImpl::NotLaunched { .. } |
-                    &mut AppStateImpl::Launching { .. } => return,
+                        &mut AppStateImpl::NotLaunched { .. }
+                        | &mut AppStateImpl::Launching { .. } => return,
                         &mut AppStateImpl::PollFinished {
                             ref mut waiting_event_handler,
                         } => ptr::read(waiting_event_handler),
                         _ => bug!("`EventHandler` unexpectedly started polling"),
                     };
-                ptr::write(&mut this.app_state, AppStateImpl::ProcessingEvents {
+                    ptr::write(
+                        &mut this.app_state,
+                        AppStateImpl::ProcessingEvents {
                             event_handler,
                             active_control_flow: ControlFlow::Poll,
-                });
+                        },
+                    );
                     Event::NewEvents(StartCause::Poll)
-            }
+                },
                 ControlFlow::Wait => {
                     let (event_handler, start) = match &mut this.app_state {
-                    &mut AppStateImpl::NotLaunched { .. } |
-                    &mut AppStateImpl::Launching { .. } => return,
+                        &mut AppStateImpl::NotLaunched { .. }
+                        | &mut AppStateImpl::Launching { .. } => return,
                         &mut AppStateImpl::Waiting {
                             ref mut waiting_event_handler,
                             ref mut start,
                         } => (ptr::read(waiting_event_handler), *start),
                         _ => bug!("`EventHandler` unexpectedly woke up"),
                     };
-                ptr::write(&mut this.app_state, AppStateImpl::ProcessingEvents {
+                    ptr::write(
+                        &mut this.app_state,
+                        AppStateImpl::ProcessingEvents {
                             event_handler,
                             active_control_flow: ControlFlow::Wait,
-                });
+                        },
+                    );
                     Event::NewEvents(StartCause::WaitCancelled {
                         start,
                         requested_resume: None,
                     })
-            }
+                },
                 ControlFlow::WaitUntil(requested_resume) => {
                     let (event_handler, start) = match &mut this.app_state {
-                    &mut AppStateImpl::NotLaunched { .. } |
-                    &mut AppStateImpl::Launching { .. } => return,
+                        &mut AppStateImpl::NotLaunched { .. }
+                        | &mut AppStateImpl::Launching { .. } => return,
                         &mut AppStateImpl::Waiting {
                             ref mut waiting_event_handler,
                             ref mut start,
                         } => (ptr::read(waiting_event_handler), *start),
                         _ => bug!("`EventHandler` unexpectedly woke up"),
                     };
-                ptr::write(&mut this.app_state, AppStateImpl::ProcessingEvents {
+                    ptr::write(
+                        &mut this.app_state,
+                        AppStateImpl::ProcessingEvents {
                             event_handler,
                             active_control_flow: ControlFlow::WaitUntil(requested_resume),
-                });
+                        },
+                    );
                     if Instant::now() >= requested_resume {
                         Event::NewEvents(StartCause::ResumeTimeReached {
                             start,
@@ -298,7 +334,7 @@ impl AppState {
                             requested_resume: Some(requested_resume),
                         })
                     }
-            }
+                },
                 ControlFlow::Exit => bug!("unexpected controlflow `Exit`"),
             };
         drop(this);
@@ -328,8 +364,8 @@ impl AppState {
                 ..
             } => {
                 queued_events.extend(events);
-                return
-            }
+                return;
+            },
             &mut AppStateImpl::ProcessingEvents {
                 ref mut event_handler,
                 ref mut active_control_flow,
@@ -338,9 +374,12 @@ impl AppState {
             | &mut AppStateImpl::Waiting { .. }
             | &mut AppStateImpl::Terminated => bug!("unexpected attempted to process an event"),
         };
-        ptr::write(&mut this.app_state, AppStateImpl::InUserCallback {
+        ptr::write(
+            &mut this.app_state,
+            AppStateImpl::InUserCallback {
                 queued_events: Vec::new(),
-        });
+            },
+        );
         drop(this);
 
         for event in events {
@@ -360,7 +399,7 @@ impl AppState {
                     active_control_flow,
                 };
                 this.control_flow = control_flow;
-                break
+                break;
             }
             drop(this);
             for event in queued_events {
@@ -384,9 +423,12 @@ impl AppState {
             | &mut AppStateImpl::Waiting { .. }
             | &mut AppStateImpl::Terminated => bug!("unexpected attempted to process an event"),
         };
-        ptr::write(&mut this.app_state, AppStateImpl::InUserCallback {
+        ptr::write(
+            &mut this.app_state,
+            AppStateImpl::InUserCallback {
                 queued_events: Vec::new(),
-        });
+            },
+        );
         drop(this);
 
         event_handler.handle_user_events(&mut control_flow);
@@ -404,7 +446,7 @@ impl AppState {
                     active_control_flow,
                 };
                 this.control_flow = control_flow;
-                break
+                break;
             }
             drop(this);
             for event in queued_events {
@@ -419,7 +461,7 @@ impl AppState {
         let mut this = AppState::get_mut();
         match &mut this.app_state {
             &mut AppStateImpl::NotLaunched { .. } | &mut AppStateImpl::Launching { .. } => return,
-            &mut AppStateImpl::ProcessingEvents { .. } => {}
+            &mut AppStateImpl::ProcessingEvents { .. } => {},
             _ => unreachable!(),
         };
         drop(this);
@@ -432,7 +474,12 @@ impl AppState {
             &mut AppStateImpl::ProcessingEvents {
                 ref mut event_handler,
                 ref mut active_control_flow,
-            } => (ManuallyDrop::new(ptr::read(event_handler)), *active_control_flow),
+            } => {
+                (
+                    ManuallyDrop::new(ptr::read(event_handler)),
+                    *active_control_flow,
+                )
+            },
             _ => unreachable!(),
         };
 
@@ -457,7 +504,8 @@ impl AppState {
                 )
             },
             (ControlFlow::WaitUntil(old_instant), ControlFlow::WaitUntil(new_instant))
-                if old_instant == new_instant => {
+                if old_instant == new_instant =>
+            {
                 let start = Instant::now();
                 ptr::write(
                     &mut this.app_state,
@@ -503,7 +551,7 @@ impl AppState {
                 // it is not possible to quit an iOS app gracefully and programatically
                 warn!("`ControlFlow::Exit` ignored on iOS");
                 this.control_flow = old
-            }
+            },
         }
     }
 
@@ -511,7 +559,11 @@ impl AppState {
         let mut this = unsafe { AppState::get_mut() };
         let mut old = mem::replace(&mut this.app_state, AppStateImpl::Terminated);
         let mut control_flow = this.control_flow;
-        if let AppStateImpl::ProcessingEvents { ref mut event_handler, .. } = old {
+        if let AppStateImpl::ProcessingEvents {
+            ref mut event_handler,
+            ..
+        } = old
+        {
             drop(this);
             event_handler.handle_nonuser_event(Event::LoopDestroyed, &mut control_flow)
         } else {
@@ -535,7 +587,7 @@ impl Drop for EventLoopWaker {
 
 impl EventLoopWaker {
     fn new(rl: CFRunLoopRef) -> EventLoopWaker {
-        extern fn wakeup_main_loop(_timer: CFRunLoopTimerRef, _info: *mut c_void) {}
+        extern "C" fn wakeup_main_loop(_timer: CFRunLoopTimerRef, _info: *mut c_void) {}
         unsafe {
             // create a timer with a 1microsec interval (1ns does not work) to mimic polling.
             // it is initially setup with a first fire time really far into the

src/platform_impl/ios/event_loop.rs

@@ -1,50 +1,33 @@
-use std::{mem, ptr};
-use std::collections::VecDeque;
-use std::ffi::c_void;
-use std::fmt::{self, Debug, Formatter};
-use std::marker::PhantomData;
-use std::sync::mpsc::{self, Sender, Receiver};
-
-use crate::event::Event;
-use crate::event_loop::{
-    ControlFlow,
-    EventLoopWindowTarget as RootEventLoopWindowTarget,
-    EventLoopClosed,
+use std::{
+    collections::VecDeque,
+    ffi::c_void,
+    fmt::{self, Debug, Formatter},
+    marker::PhantomData,
+    mem, ptr,
+    sync::mpsc::{self, Receiver, Sender},
 };
-use crate::platform::ios::Idiom;
 
-use crate::platform_impl::platform::app_state::AppState;
-use crate::platform_impl::platform::ffi::{
-    id,
-    nil,
-    CFIndex,
-    CFRelease,
-    CFRunLoopActivity,
-    CFRunLoopAddObserver,
-    CFRunLoopAddSource,
-    CFRunLoopGetMain,
-    CFRunLoopObserverCreate,
-    CFRunLoopObserverRef,
-    CFRunLoopSourceContext,
-    CFRunLoopSourceCreate,
-    CFRunLoopSourceInvalidate,
-    CFRunLoopSourceRef,
-    CFRunLoopSourceSignal,
-    CFRunLoopWakeUp,
-    kCFRunLoopCommonModes,
-    kCFRunLoopDefaultMode,
-    kCFRunLoopEntry,
-    kCFRunLoopBeforeWaiting,
-    kCFRunLoopAfterWaiting,
-    kCFRunLoopExit,
-    NSOperatingSystemVersion,
-    NSString,
-    UIApplicationMain,
-    UIUserInterfaceIdiom,
+use crate::{
+    event::Event,
+    event_loop::{
+        ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootEventLoopWindowTarget,
+    },
+    platform::ios::Idiom,
+};
+
+use crate::platform_impl::platform::{
+    app_state::AppState,
+    ffi::{
+        id, kCFRunLoopAfterWaiting, kCFRunLoopBeforeWaiting, kCFRunLoopCommonModes,
+        kCFRunLoopDefaultMode, kCFRunLoopEntry, kCFRunLoopExit, nil, CFIndex, CFRelease,
+        CFRunLoopActivity, CFRunLoopAddObserver, CFRunLoopAddSource, CFRunLoopGetMain,
+        CFRunLoopObserverCreate, CFRunLoopObserverRef, CFRunLoopSourceContext,
+        CFRunLoopSourceCreate, CFRunLoopSourceInvalidate, CFRunLoopSourceRef,
+        CFRunLoopSourceSignal, CFRunLoopWakeUp, NSOperatingSystemVersion, NSString,
+        UIApplicationMain, UIUserInterfaceIdiom,
+    },
+    monitor, view, MonitorHandle,
 };
-use crate::platform_impl::platform::monitor;
-use crate::platform_impl::platform::MonitorHandle;
-use crate::platform_impl::platform::view;
 
 pub struct EventLoopWindowTarget<T: 'static> {
     receiver: Receiver<T>,
@@ -67,8 +50,11 @@ impl<T: 'static> EventLoop<T> {
         static mut SINGLETON_INIT: bool = false;
         unsafe {
             assert_main_thread!("`EventLoop` can only be created on the main thread on iOS");
-            assert!(!SINGLETON_INIT, "Only one `EventLoop` is supported on iOS. \
-                `EventLoopProxy` might be helpful");
+            assert!(
+                !SINGLETON_INIT,
+                "Only one `EventLoop` is supported on iOS. \
+                 `EventLoopProxy` might be helpful"
+            );
             SINGLETON_INIT = true;
             view::create_delegate_class();
         }
@@ -92,25 +78,34 @@ impl<T: 'static> EventLoop<T> {
                     capabilities,
                 },
                 _marker: PhantomData,
-            }
+            },
         }
     }
 
     pub fn run<F>(self, event_handler: F) -> !
     where
-        F: 'static + FnMut(Event<T>, &RootEventLoopWindowTarget<T>, &mut ControlFlow)
+        F: 'static + FnMut(Event<T>, &RootEventLoopWindowTarget<T>, &mut ControlFlow),
     {
         unsafe {
             let application: *mut c_void = msg_send![class!(UIApplication), sharedApplication];
-            assert_eq!(application, ptr::null_mut(), "\
+            assert_eq!(
+                application,
+                ptr::null_mut(),
+                "\
                  `EventLoop` cannot be `run` after a call to `UIApplicationMain` on iOS\n\
-                Note: `EventLoop::run` calls `UIApplicationMain` on iOS");
+                 Note: `EventLoop::run` calls `UIApplicationMain` on iOS"
+            );
             AppState::will_launch(Box::new(EventLoopHandler {
                 f: event_handler,
                 event_loop: self.window_target,
             }));
 
-            UIApplicationMain(0, ptr::null(), nil, NSString::alloc(nil).init_str("AppDelegate"));
+            UIApplicationMain(
+                0,
+                ptr::null(),
+                nil,
+                NSString::alloc(nil).init_str("AppDelegate"),
+            );
             unreachable!()
         }
     }
@@ -121,16 +116,12 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         // guaranteed to be on main thread
-        unsafe {
-            monitor::uiscreens()
-        }
+        unsafe { monitor::uiscreens() }
     }
 
     pub fn primary_monitor(&self) -> MonitorHandle {
         // guaranteed to be on main thread
-        unsafe {
-            monitor::main_uiscreen()
-        }
+        unsafe { monitor::main_uiscreen() }
     }
 
     pub fn window_target(&self) -> &RootEventLoopWindowTarget<T> {
@@ -142,9 +133,7 @@ impl<T: 'static> EventLoop<T> {
 impl<T: 'static> EventLoop<T> {
     pub fn idiom(&self) -> Idiom {
         // guaranteed to be on main thread
-        unsafe {
-            self::get_idiom()
-        }
+        unsafe { self::get_idiom() }
     }
 }
 
@@ -183,18 +172,12 @@ impl<T> EventLoopProxy<T> {
             // we want all the members of context to be zero/null, except one
             let mut context: CFRunLoopSourceContext = mem::zeroed();
             context.perform = event_loop_proxy_handler;
-            let source = CFRunLoopSourceCreate(
-                ptr::null_mut(),
-                CFIndex::max_value() - 1,
-                &mut context,
-            );
+            let source =
+                CFRunLoopSourceCreate(ptr::null_mut(), CFIndex::max_value() - 1, &mut context);
             CFRunLoopAddSource(rl, source, kCFRunLoopCommonModes);
             CFRunLoopWakeUp(rl);
 
-            EventLoopProxy {
-                sender,
-                source,
-            }
+            EventLoopProxy { sender, source }
         }
     }
 
@@ -213,7 +196,7 @@ impl<T> EventLoopProxy<T> {
 fn setup_control_flow_observers() {
     unsafe {
         // begin is queued with the highest priority to ensure it is processed before other observers
-        extern fn control_flow_begin_handler(
+        extern "C" fn control_flow_begin_handler(
             _: CFRunLoopObserverRef,
             activity: CFRunLoopActivity,
             _: *mut c_void,
@@ -230,7 +213,7 @@ fn setup_control_flow_observers() {
 
         // end is queued with the lowest priority to ensure it is processed after other observers
         // without that, LoopDestroyed will get sent after EventsCleared
-        extern fn control_flow_end_handler(
+        extern "C" fn control_flow_end_handler(
             _: CFRunLoopObserverRef,
             activity: CFRunLoopActivity,
             _: *mut c_void,
@@ -282,7 +265,8 @@ struct EventLoopHandler<F, T: 'static> {
 
 impl<F, T: 'static> Debug for EventLoopHandler<F, T> {
     fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
-        formatter.debug_struct("EventLoopHandler")
+        formatter
+            .debug_struct("EventLoopHandler")
             .field("event_loop", &self.event_loop)
             .finish()
     }
@@ -303,11 +287,7 @@ where
 
     fn handle_user_events(&mut self, control_flow: &mut ControlFlow) {
         for event in self.event_loop.p.receiver.try_iter() {
-            (self.f)(
-                Event::UserEvent(event),
-                &self.event_loop,
-                control_flow,
-            );
+            (self.f)(Event::UserEvent(event), &self.event_loop, control_flow);
         }
     }
 }
@@ -325,7 +305,10 @@ pub struct Capabilities {
 
 impl From<NSOperatingSystemVersion> for Capabilities {
     fn from(os_version: NSOperatingSystemVersion) -> Capabilities {
-        assert!(os_version.major >= 8, "`winit` current requires iOS version 8 or greater");
+        assert!(
+            os_version.major >= 8,
+            "`winit` current requires iOS version 8 or greater"
+        );
 
         let supports_safe_area = os_version.major >= 11;
 

src/platform_impl/ios/ffi.rs

@@ -1,11 +1,8 @@
 #![allow(non_camel_case_types, non_snake_case, non_upper_case_globals)]
 
-use std::ffi::CString;
-use std::ops::BitOr;
-use std::os::raw::*;
+use std::{ffi::CString, ops::BitOr, os::raw::*};
 
-use objc::{Encode, Encoding};
-use objc::runtime::Object;
+use objc::{runtime::Object, Encode, Encoding};
 
 use crate::platform::ios::{Idiom, ValidOrientations};
 
@@ -87,7 +84,9 @@ pub struct UIEdgeInsets {
 pub struct UIUserInterfaceIdiom(NSInteger);
 
 unsafe impl Encode for UIUserInterfaceIdiom {
-    fn encode() -> Encoding { NSInteger::encode() }
+    fn encode() -> Encoding {
+        NSInteger::encode()
+    }
 }
 
 impl UIUserInterfaceIdiom {
@@ -128,7 +127,9 @@ impl Into<Idiom> for UIUserInterfaceIdiom {
 pub struct UIInterfaceOrientationMask(NSUInteger);
 
 unsafe impl Encode for UIInterfaceOrientationMask {
-    fn encode() -> Encoding { NSUInteger::encode() }
+    fn encode() -> Encoding {
+        NSUInteger::encode()
+    }
 }
 
 impl UIInterfaceOrientationMask {
@@ -136,9 +137,12 @@ impl UIInterfaceOrientationMask {
     pub const PortraitUpsideDown: UIInterfaceOrientationMask = UIInterfaceOrientationMask(1 << 2);
     pub const LandscapeLeft: UIInterfaceOrientationMask = UIInterfaceOrientationMask(1 << 4);
     pub const LandscapeRight: UIInterfaceOrientationMask = UIInterfaceOrientationMask(1 << 3);
-    pub const Landscape: UIInterfaceOrientationMask = UIInterfaceOrientationMask(Self::LandscapeLeft.0 | Self::LandscapeRight.0);
-    pub const AllButUpsideDown: UIInterfaceOrientationMask = UIInterfaceOrientationMask(Self::Landscape.0 | Self::Portrait.0);
-    pub const All: UIInterfaceOrientationMask = UIInterfaceOrientationMask(Self::AllButUpsideDown.0 | Self::PortraitUpsideDown.0);
+    pub const Landscape: UIInterfaceOrientationMask =
+        UIInterfaceOrientationMask(Self::LandscapeLeft.0 | Self::LandscapeRight.0);
+    pub const AllButUpsideDown: UIInterfaceOrientationMask =
+        UIInterfaceOrientationMask(Self::Landscape.0 | Self::Portrait.0);
+    pub const All: UIInterfaceOrientationMask =
+        UIInterfaceOrientationMask(Self::AllButUpsideDown.0 | Self::PortraitUpsideDown.0);
 }
 
 impl BitOr for UIInterfaceOrientationMask {
@@ -155,18 +159,23 @@ impl UIInterfaceOrientationMask {
         idiom: Idiom,
     ) -> UIInterfaceOrientationMask {
         match (valid_orientations, idiom) {
-            (ValidOrientations::LandscapeAndPortrait, Idiom::Phone) => UIInterfaceOrientationMask::AllButUpsideDown,
+            (ValidOrientations::LandscapeAndPortrait, Idiom::Phone) => {
+                UIInterfaceOrientationMask::AllButUpsideDown
+            },
             (ValidOrientations::LandscapeAndPortrait, _) => UIInterfaceOrientationMask::All,
             (ValidOrientations::Landscape, _) => UIInterfaceOrientationMask::Landscape,
             (ValidOrientations::Portrait, Idiom::Phone) => UIInterfaceOrientationMask::Portrait,
-            (ValidOrientations::Portrait, _) => UIInterfaceOrientationMask::Portrait | UIInterfaceOrientationMask::PortraitUpsideDown,
+            (ValidOrientations::Portrait, _) => {
+                UIInterfaceOrientationMask::Portrait
+                    | UIInterfaceOrientationMask::PortraitUpsideDown
+            },
         }
     }
 }
 
 #[link(name = "UIKit", kind = "framework")]
 #[link(name = "CoreFoundation", kind = "framework")]
-extern {
+extern "C" {
     pub static kCFRunLoopDefaultMode: CFRunLoopMode;
     pub static kCFRunLoopCommonModes: CFRunLoopMode;
 
@@ -203,15 +212,8 @@ extern {
         callout: CFRunLoopTimerCallBack,
         context: *mut CFRunLoopTimerContext,
     ) -> CFRunLoopTimerRef;
-    pub fn CFRunLoopAddTimer(
-        rl: CFRunLoopRef,
-        timer: CFRunLoopTimerRef,
-        mode: CFRunLoopMode,
-    );
-    pub fn CFRunLoopTimerSetNextFireDate(
-        timer: CFRunLoopTimerRef,
-        fireDate: CFAbsoluteTime,
-    );
+    pub fn CFRunLoopAddTimer(rl: CFRunLoopRef, timer: CFRunLoopTimerRef, mode: CFRunLoopMode);
+    pub fn CFRunLoopTimerSetNextFireDate(timer: CFRunLoopTimerRef, fireDate: CFAbsoluteTime);
     pub fn CFRunLoopTimerInvalidate(time: CFRunLoopTimerRef);
 
     pub fn CFRunLoopSourceCreate(
@@ -219,11 +221,7 @@ extern {
         order: CFIndex,
         context: *mut CFRunLoopSourceContext,
     ) -> CFRunLoopSourceRef;
-    pub fn CFRunLoopAddSource(
-        rl: CFRunLoopRef,
-        source: CFRunLoopSourceRef,
-        mode: CFRunLoopMode,
-    );
+    pub fn CFRunLoopAddSource(rl: CFRunLoopRef, source: CFRunLoopSourceRef, mode: CFRunLoopMode);
     pub fn CFRunLoopSourceInvalidate(source: CFRunLoopSourceRef);
     pub fn CFRunLoopSourceSignal(source: CFRunLoopSourceRef);
 
@@ -259,15 +257,9 @@ pub const kCFRunLoopBeforeWaiting: CFRunLoopActivity = 1 << 5;
 pub const kCFRunLoopAfterWaiting: CFRunLoopActivity = 1 << 6;
 pub const kCFRunLoopExit: CFRunLoopActivity = 1 << 7;
 
-pub type CFRunLoopObserverCallBack = extern "C" fn(
-    observer: CFRunLoopObserverRef,
-    activity: CFRunLoopActivity,
-    info: *mut c_void,
-);
-pub type CFRunLoopTimerCallBack = extern "C" fn(
-    timer: CFRunLoopTimerRef,
-    info: *mut c_void,
-);
+pub type CFRunLoopObserverCallBack =
+    extern "C" fn(observer: CFRunLoopObserverRef, activity: CFRunLoopActivity, info: *mut c_void);
+pub type CFRunLoopTimerCallBack = extern "C" fn(timer: CFRunLoopTimerRef, info: *mut c_void);
 
 pub enum CFRunLoopObserverContext {}
 pub enum CFRunLoopTimerContext {}
@@ -299,11 +291,11 @@ pub trait NSString: Sized {
 
 impl NSString for id {
     unsafe fn initWithUTF8String_(self, c_string: *const c_char) -> id {
-        msg_send![self, initWithUTF8String:c_string as id]
+        msg_send![self, initWithUTF8String: c_string as id]
     }
 
     unsafe fn stringByAppendingString_(self, other: id) -> id {
-        msg_send![self, stringByAppendingString:other]
+        msg_send![self, stringByAppendingString: other]
     }
 
     unsafe fn init_str(self, string: &str) -> id {

src/platform_impl/ios/mod.rs

@@ -26,7 +26,6 @@
 //! fn start_inner() {
 //!    ...
 //! }
-//!
 //! ```
 //!
 //! Compile project and then drag resulting .a into Xcode project. Add winit.h to xcode.
@@ -78,12 +77,10 @@ mod window;
 
 use std::fmt;
 
-pub use self::event_loop::{EventLoop, EventLoopProxy, EventLoopWindowTarget};
-pub use self::monitor::MonitorHandle;
-pub use self::window::{
-    PlatformSpecificWindowBuilderAttributes,
-    Window,
-    WindowId,
+pub use self::{
+    event_loop::{EventLoop, EventLoopProxy, EventLoopWindowTarget},
+    monitor::MonitorHandle,
+    window::{PlatformSpecificWindowBuilderAttributes, Window, WindowId},
 };
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -108,7 +105,7 @@ pub enum OsError {}
 impl fmt::Display for OsError {
     fn fmt(&self, _: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            _ => unreachable!()
+            _ => unreachable!(),
         }
     }
 }

src/platform_impl/ios/monitor.rs

@@ -4,10 +4,14 @@ use std::{
     ops::{Deref, DerefMut},
 };
 
-use crate::dpi::{PhysicalPosition, PhysicalSize};
-use crate::monitor::VideoMode;
+use crate::{
+    dpi::{PhysicalPosition, PhysicalSize},
+    monitor::VideoMode,
+};
 
-use crate::platform_impl::platform::ffi::{id, nil, CGFloat, CGRect, CGSize, NSInteger, NSUInteger};
+use crate::platform_impl::platform::ffi::{
+    id, nil, CGFloat, CGRect, CGSize, NSInteger, NSUInteger,
+};
 
 pub struct Inner {
     uiscreen: id,
@@ -30,7 +34,9 @@ impl Deref for MonitorHandle {
 
     fn deref(&self) -> &Inner {
         unsafe {
-            assert_main_thread!("`MonitorHandle` methods can only be run on the main thread on iOS");
+            assert_main_thread!(
+                "`MonitorHandle` methods can only be run on the main thread on iOS"
+            );
         }
         &self.inner
     }
@@ -39,7 +45,9 @@ impl Deref for MonitorHandle {
 impl DerefMut for MonitorHandle {
     fn deref_mut(&mut self) -> &mut Inner {
         unsafe {
-            assert_main_thread!("`MonitorHandle` methods can only be run on the main thread on iOS");
+            assert_main_thread!(
+                "`MonitorHandle` methods can only be run on the main thread on iOS"
+            );
         }
         &mut self.inner
     }
@@ -89,7 +97,9 @@ impl MonitorHandle {
             assert_main_thread!("`MonitorHandle` can only be cloned on the main thread on iOS");
             let () = msg_send![uiscreen, retain];
         }
-        MonitorHandle { inner: Inner { uiscreen } }
+        MonitorHandle {
+            inner: Inner { uiscreen },
+        }
     }
 }
 
@@ -180,7 +190,7 @@ pub unsafe fn uiscreens() -> VecDeque<MonitorHandle> {
     loop {
         let screen: id = msg_send![screens_enum, nextObject];
         if screen == nil {
-            break result
+            break result;
         }
         result.push_back(MonitorHandle::retained_new(screen));
     }

src/platform_impl/ios/view.rs

@@ -1,31 +1,23 @@
 use std::collections::HashMap;
 
-use objc::declare::ClassDecl;
-use objc::runtime::{BOOL, Class, NO, Object, Sel, YES};
-
-use crate::event::{
-    DeviceId as RootDeviceId,
-    Event,
-    Touch,
-    TouchPhase,
-    WindowEvent
+use objc::{
+    declare::ClassDecl,
+    runtime::{Class, Object, Sel, BOOL, NO, YES},
 };
-use crate::platform::ios::MonitorHandleExtIOS;
-use crate::window::{WindowAttributes, WindowId as RootWindowId};
 
-use crate::platform_impl::platform::app_state::AppState;
-use crate::platform_impl::platform::DeviceId;
-use crate::platform_impl::platform::event_loop;
-use crate::platform_impl::platform::ffi::{
-    id,
-    nil,
-    CGFloat,
-    CGPoint,
-    CGRect,
-    UIInterfaceOrientationMask,
-    UITouchPhase,
+use crate::{
+    event::{DeviceId as RootDeviceId, Event, Touch, TouchPhase, WindowEvent},
+    platform::ios::MonitorHandleExtIOS,
+    window::{WindowAttributes, WindowId as RootWindowId},
+};
+
+use crate::platform_impl::platform::{
+    app_state::AppState,
+    event_loop,
+    ffi::{id, nil, CGFloat, CGPoint, CGRect, UIInterfaceOrientationMask, UITouchPhase},
+    window::PlatformSpecificWindowBuilderAttributes,
+    DeviceId,
 };
-use crate::platform_impl::platform::window::{PlatformSpecificWindowBuilderAttributes};
 
 // requires main thread
 unsafe fn get_view_class(root_view_class: &'static Class) -> &'static Class {
@@ -40,10 +32,13 @@ unsafe fn get_view_class(root_view_class: &'static Class) -> &'static Class {
 
     classes.entry(root_view_class).or_insert_with(move || {
         let uiview_class = class!(UIView);
-        let is_uiview: BOOL = msg_send![root_view_class, isSubclassOfClass:uiview_class];
-        assert_eq!(is_uiview, YES, "`root_view_class` must inherit from `UIView`");
+        let is_uiview: BOOL = msg_send![root_view_class, isSubclassOfClass: uiview_class];
+        assert_eq!(
+            is_uiview, YES,
+            "`root_view_class` must inherit from `UIView`"
+        );
 
-        extern fn draw_rect(object: &Object, _: Sel, rect: CGRect) {
+        extern "C" fn draw_rect(object: &Object, _: Sel, rect: CGRect) {
             unsafe {
                 let window: id = msg_send![object, window];
                 AppState::handle_nonuser_event(Event::WindowEvent {
@@ -55,13 +50,14 @@ unsafe fn get_view_class(root_view_class: &'static Class) -> &'static Class {
             }
         }
 
-        extern fn layout_subviews(object: &Object, _: Sel) {
+        extern "C" fn layout_subviews(object: &Object, _: Sel) {
             unsafe {
                 let window: id = msg_send![object, window];
                 let bounds: CGRect = msg_send![window, bounds];
                 let screen: id = msg_send![window, screen];
                 let screen_space: id = msg_send![screen, coordinateSpace];
-                let screen_frame: CGRect = msg_send![object, convertRect:bounds toCoordinateSpace:screen_space];
+                let screen_frame: CGRect =
+                    msg_send![object, convertRect:bounds toCoordinateSpace:screen_space];
                 let size = crate::dpi::LogicalSize {
                     width: screen_frame.size.width,
                     height: screen_frame.size.height,
@@ -78,10 +74,14 @@ unsafe fn get_view_class(root_view_class: &'static Class) -> &'static Class {
         let mut decl = ClassDecl::new(&format!("WinitUIView{}", ID), root_view_class)
             .expect("Failed to declare class `WinitUIView`");
         ID += 1;
-        decl.add_method(sel!(drawRect:),
-                        draw_rect as extern fn(&Object, Sel, CGRect));
-        decl.add_method(sel!(layoutSubviews),
-                        layout_subviews as extern fn(&Object, Sel));
+        decl.add_method(
+            sel!(drawRect:),
+            draw_rect as extern "C" fn(&Object, Sel, CGRect),
+        );
+        decl.add_method(
+            sel!(layoutSubviews),
+            layout_subviews as extern "C" fn(&Object, Sel),
+        );
         decl.register()
     })
 }
@@ -92,33 +92,39 @@ unsafe fn get_view_controller_class() -> &'static Class {
     if CLASS.is_none() {
         let uiviewcontroller_class = class!(UIViewController);
 
-        extern fn set_prefers_status_bar_hidden(object: &mut Object, _: Sel, hidden: BOOL) {
+        extern "C" fn set_prefers_status_bar_hidden(object: &mut Object, _: Sel, hidden: BOOL) {
             unsafe {
                 object.set_ivar::<BOOL>("_prefers_status_bar_hidden", hidden);
                 let () = msg_send![object, setNeedsStatusBarAppearanceUpdate];
             }
         }
 
-        extern fn prefers_status_bar_hidden(object: &Object, _: Sel) -> BOOL {
-            unsafe {
-                *object.get_ivar::<BOOL>("_prefers_status_bar_hidden")
-            }
+        extern "C" fn prefers_status_bar_hidden(object: &Object, _: Sel) -> BOOL {
+            unsafe { *object.get_ivar::<BOOL>("_prefers_status_bar_hidden") }
         }
 
-        extern fn set_supported_orientations(object: &mut Object, _: Sel, orientations: UIInterfaceOrientationMask) {
+        extern "C" fn set_supported_orientations(
+            object: &mut Object,
+            _: Sel,
+            orientations: UIInterfaceOrientationMask,
+        ) {
             unsafe {
-                object.set_ivar::<UIInterfaceOrientationMask>("_supported_orientations", orientations);
+                object.set_ivar::<UIInterfaceOrientationMask>(
+                    "_supported_orientations",
+                    orientations,
+                );
                 let () = msg_send![class!(UIViewController), attemptRotationToDeviceOrientation];
             }
         }
 
-        extern fn supported_orientations(object: &Object, _: Sel) -> UIInterfaceOrientationMask {
-            unsafe {
-                *object.get_ivar::<UIInterfaceOrientationMask>("_supported_orientations")
-            }
+        extern "C" fn supported_orientations(
+            object: &Object,
+            _: Sel,
+        ) -> UIInterfaceOrientationMask {
+            unsafe { *object.get_ivar::<UIInterfaceOrientationMask>("_supported_orientations") }
         }
 
-        extern fn should_autorotate(_: &Object, _: Sel) -> BOOL {
+        extern "C" fn should_autorotate(_: &Object, _: Sel) -> BOOL {
             YES
         }
 
@@ -126,16 +132,27 @@ unsafe fn get_view_controller_class() -> &'static Class {
             .expect("Failed to declare class `WinitUIViewController`");
         decl.add_ivar::<BOOL>("_prefers_status_bar_hidden");
         decl.add_ivar::<UIInterfaceOrientationMask>("_supported_orientations");
-        decl.add_method(sel!(setPrefersStatusBarHidden:),
-                        set_prefers_status_bar_hidden as extern fn(&mut Object, Sel, BOOL));
-        decl.add_method(sel!(prefersStatusBarHidden),
-                        prefers_status_bar_hidden as extern fn(&Object, Sel) -> BOOL);
-        decl.add_method(sel!(setSupportedInterfaceOrientations:),
-                        set_supported_orientations as extern fn(&mut Object, Sel, UIInterfaceOrientationMask));
-        decl.add_method(sel!(supportedInterfaceOrientations),
-                        supported_orientations as extern fn(&Object, Sel) -> UIInterfaceOrientationMask);
-        decl.add_method(sel!(shouldAutorotate),
-                        should_autorotate as extern fn(&Object, Sel) -> BOOL);
+        decl.add_method(
+            sel!(setPrefersStatusBarHidden:),
+            set_prefers_status_bar_hidden as extern "C" fn(&mut Object, Sel, BOOL),
+        );
+        decl.add_method(
+            sel!(prefersStatusBarHidden),
+            prefers_status_bar_hidden as extern "C" fn(&Object, Sel) -> BOOL,
+        );
+        decl.add_method(
+            sel!(setSupportedInterfaceOrientations:),
+            set_supported_orientations
+                as extern "C" fn(&mut Object, Sel, UIInterfaceOrientationMask),
+        );
+        decl.add_method(
+            sel!(supportedInterfaceOrientations),
+            supported_orientations as extern "C" fn(&Object, Sel) -> UIInterfaceOrientationMask,
+        );
+        decl.add_method(
+            sel!(shouldAutorotate),
+            should_autorotate as extern "C" fn(&Object, Sel) -> BOOL,
+        );
         CLASS = Some(decl.register());
     }
     CLASS.unwrap()
@@ -147,7 +164,7 @@ unsafe fn get_window_class() -> &'static Class {
     if CLASS.is_none() {
         let uiwindow_class = class!(UIWindow);
 
-        extern fn become_key_window(object: &Object, _: Sel) {
+        extern "C" fn become_key_window(object: &Object, _: Sel) {
             unsafe {
                 AppState::handle_nonuser_event(Event::WindowEvent {
                     window_id: RootWindowId(object.into()),
@@ -157,7 +174,7 @@ unsafe fn get_window_class() -> &'static Class {
             }
         }
 
-        extern fn resign_key_window(object: &Object, _: Sel) {
+        extern "C" fn resign_key_window(object: &Object, _: Sel) {
             unsafe {
                 AppState::handle_nonuser_event(Event::WindowEvent {
                     window_id: RootWindowId(object.into()),
@@ -167,7 +184,7 @@ unsafe fn get_window_class() -> &'static Class {
             }
         }
 
-        extern fn handle_touches(object: &Object, _: Sel, touches: id, _:id) {
+        extern "C" fn handle_touches(object: &Object, _: Sel, touches: id, _: id) {
             unsafe {
                 let uiscreen = msg_send![object, screen];
                 let touches_enum: id = msg_send![touches, objectEnumerator];
@@ -175,9 +192,9 @@ unsafe fn get_window_class() -> &'static Class {
                 loop {
                     let touch: id = msg_send![touches_enum, nextObject];
                     if touch == nil {
-                        break
+                        break;
                     }
-                    let location: CGPoint = msg_send![touch, locationInView:nil];
+                    let location: CGPoint = msg_send![touch, locationInView: nil];
                     let touch_id = touch as u64;
                     let phase: UITouchPhase = msg_send![touch, phase];
                     let phase = match phase {
@@ -203,16 +220,20 @@ unsafe fn get_window_class() -> &'static Class {
             }
         }
 
-        extern fn set_content_scale_factor(object: &mut Object, _: Sel, hidpi_factor: CGFloat) {
+        extern "C" fn set_content_scale_factor(object: &mut Object, _: Sel, hidpi_factor: CGFloat) {
             unsafe {
-                let () = msg_send![super(object, class!(UIWindow)), setContentScaleFactor:hidpi_factor];
+                let () = msg_send![
+                    super(object, class!(UIWindow)),
+                    setContentScaleFactor: hidpi_factor
+                ];
                 let view_controller: id = msg_send![object, rootViewController];
                 let view: id = msg_send![view_controller, view];
-                let () = msg_send![view, setContentScaleFactor:hidpi_factor];
+                let () = msg_send![view, setContentScaleFactor: hidpi_factor];
                 let bounds: CGRect = msg_send![object, bounds];
                 let screen: id = msg_send![object, screen];
                 let screen_space: id = msg_send![screen, coordinateSpace];
-                let screen_frame: CGRect = msg_send![object, convertRect:bounds toCoordinateSpace:screen_space];
+                let screen_frame: CGRect =
+                    msg_send![object, convertRect:bounds toCoordinateSpace:screen_space];
                 let size = crate::dpi::LogicalSize {
                     width: screen_frame.size.width,
                     height: screen_frame.size.height,
@@ -221,32 +242,47 @@ unsafe fn get_window_class() -> &'static Class {
                     std::iter::once(Event::WindowEvent {
                         window_id: RootWindowId(object.into()),
                         event: WindowEvent::HiDpiFactorChanged(hidpi_factor as _),
-                    }).chain(std::iter::once(Event::WindowEvent {
+                    })
+                    .chain(std::iter::once(Event::WindowEvent {
                         window_id: RootWindowId(object.into()),
                         event: WindowEvent::Resized(size),
-                    }))
+                    })),
                 );
             }
         }
 
         let mut decl = ClassDecl::new("WinitUIWindow", uiwindow_class)
             .expect("Failed to declare class `WinitUIWindow`");
-        decl.add_method(sel!(becomeKeyWindow),
-                        become_key_window as extern fn(&Object, Sel));
-        decl.add_method(sel!(resignKeyWindow),
-                        resign_key_window as extern fn(&Object, Sel));
+        decl.add_method(
+            sel!(becomeKeyWindow),
+            become_key_window as extern "C" fn(&Object, Sel),
+        );
+        decl.add_method(
+            sel!(resignKeyWindow),
+            resign_key_window as extern "C" fn(&Object, Sel),
+        );
 
-        decl.add_method(sel!(touchesBegan:withEvent:),
-                        handle_touches as extern fn(this: &Object, _: Sel, _: id, _:id));
-        decl.add_method(sel!(touchesMoved:withEvent:),
-                        handle_touches as extern fn(this: &Object, _: Sel, _: id, _:id));
-        decl.add_method(sel!(touchesEnded:withEvent:),
-                        handle_touches as extern fn(this: &Object, _: Sel, _: id, _:id));
-        decl.add_method(sel!(touchesCancelled:withEvent:),
-                        handle_touches as extern fn(this: &Object, _: Sel, _: id, _:id));
+        decl.add_method(
+            sel!(touchesBegan:withEvent:),
+            handle_touches as extern "C" fn(this: &Object, _: Sel, _: id, _: id),
+        );
+        decl.add_method(
+            sel!(touchesMoved:withEvent:),
+            handle_touches as extern "C" fn(this: &Object, _: Sel, _: id, _: id),
+        );
+        decl.add_method(
+            sel!(touchesEnded:withEvent:),
+            handle_touches as extern "C" fn(this: &Object, _: Sel, _: id, _: id),
+        );
+        decl.add_method(
+            sel!(touchesCancelled:withEvent:),
+            handle_touches as extern "C" fn(this: &Object, _: Sel, _: id, _: id),
+        );
 
-        decl.add_method(sel!(setContentScaleFactor:),
-                        set_content_scale_factor as extern fn(&mut Object, Sel, CGFloat));
+        decl.add_method(
+            sel!(setContentScaleFactor:),
+            set_content_scale_factor as extern "C" fn(&mut Object, Sel, CGFloat),
+        );
 
         CLASS = Some(decl.register());
     }
@@ -263,9 +299,9 @@ pub unsafe fn create_view(
 
     let view: id = msg_send![class, alloc];
     assert!(!view.is_null(), "Failed to create `UIView` instance");
-    let view: id = msg_send![view, initWithFrame:frame];
+    let view: id = msg_send![view, initWithFrame: frame];
     assert!(!view.is_null(), "Failed to initialize `UIView` instance");
-    let () = msg_send![view, setMultipleTouchEnabled:YES];
+    let () = msg_send![view, setMultipleTouchEnabled: YES];
 
     view
 }
@@ -279,9 +315,15 @@ pub unsafe fn create_view_controller(
     let class = get_view_controller_class();
 
     let view_controller: id = msg_send![class, alloc];
-    assert!(!view_controller.is_null(), "Failed to create `UIViewController` instance");
+    assert!(
+        !view_controller.is_null(),
+        "Failed to create `UIViewController` instance"
+    );
     let view_controller: id = msg_send![view_controller, init];
-    assert!(!view_controller.is_null(), "Failed to initialize `UIViewController` instance");
+    assert!(
+        !view_controller.is_null(),
+        "Failed to initialize `UIViewController` instance"
+    );
     let status_bar_hidden = if window_attributes.decorations {
         NO
     } else {
@@ -292,9 +334,15 @@ pub unsafe fn create_view_controller(
         platform_attributes.valid_orientations,
         idiom,
     );
-    let () = msg_send![view_controller, setPrefersStatusBarHidden:status_bar_hidden];
-    let () = msg_send![view_controller, setSupportedInterfaceOrientations:supported_orientations];
-    let () = msg_send![view_controller, setView:view];
+    let () = msg_send![
+        view_controller,
+        setPrefersStatusBarHidden: status_bar_hidden
+    ];
+    let () = msg_send![
+        view_controller,
+        setSupportedInterfaceOrientations: supported_orientations
+    ];
+    let () = msg_send![view_controller, setView: view];
     view_controller
 }
 
@@ -309,11 +357,14 @@ pub unsafe fn create_window(
 
     let window: id = msg_send![class, alloc];
     assert!(!window.is_null(), "Failed to create `UIWindow` instance");
-    let window: id = msg_send![window, initWithFrame:frame];
-    assert!(!window.is_null(), "Failed to initialize `UIWindow` instance");
-    let () = msg_send![window, setRootViewController:view_controller];
+    let window: id = msg_send![window, initWithFrame: frame];
+    assert!(
+        !window.is_null(),
+        "Failed to initialize `UIWindow` instance"
+    );
+    let () = msg_send![window, setRootViewController: view_controller];
     if let Some(hidpi_factor) = platform_attributes.hidpi_factor {
-        let () = msg_send![window, setContentScaleFactor:hidpi_factor as CGFloat];
+        let () = msg_send![window, setContentScaleFactor: hidpi_factor as CGFloat];
     }
     if let &Some(ref monitor) = &window_attributes.fullscreen {
         let () = msg_send![window, setScreen:monitor.ui_screen()];
@@ -323,29 +374,25 @@ pub unsafe fn create_window(
 }
 
 pub fn create_delegate_class() {
-    extern fn did_finish_launching(_: &mut Object, _: Sel, _: id, _: id) -> BOOL {
+    extern "C" fn did_finish_launching(_: &mut Object, _: Sel, _: id, _: id) -> BOOL {
         unsafe {
             AppState::did_finish_launching();
         }
         YES
     }
 
-    extern fn did_become_active(_: &Object, _: Sel, _: id) {
-        unsafe {
-            AppState::handle_nonuser_event(Event::Suspended(false))
-        }
+    extern "C" fn did_become_active(_: &Object, _: Sel, _: id) {
+        unsafe { AppState::handle_nonuser_event(Event::Suspended(false)) }
     }
 
-    extern fn will_resign_active(_: &Object, _: Sel, _: id) {
-        unsafe {
-            AppState::handle_nonuser_event(Event::Suspended(true))
-        }
+    extern "C" fn will_resign_active(_: &Object, _: Sel, _: id) {
+        unsafe { AppState::handle_nonuser_event(Event::Suspended(true)) }
     }
 
-    extern fn will_enter_foreground(_: &Object, _: Sel, _: id) {}
-    extern fn did_enter_background(_: &Object, _: Sel, _: id) {}
+    extern "C" fn will_enter_foreground(_: &Object, _: Sel, _: id) {}
+    extern "C" fn did_enter_background(_: &Object, _: Sel, _: id) {}
 
-    extern fn will_terminate(_: &Object, _: Sel, _: id) {
+    extern "C" fn will_terminate(_: &Object, _: Sel, _: id) {
         unsafe {
             let app: id = msg_send![class!(UIApplication), sharedApplication];
             let windows: id = msg_send![app, windows];
@@ -354,9 +401,9 @@ pub fn create_delegate_class() {
             loop {
                 let window: id = msg_send![windows_enum, nextObject];
                 if window == nil {
-                    break
+                    break;
                 }
-                let is_winit_window: BOOL = msg_send![window, isKindOfClass:class!(WinitUIWindow)];
+                let is_winit_window: BOOL = msg_send![window, isKindOfClass: class!(WinitUIWindow)];
                 if is_winit_window == YES {
                     events.push(Event::WindowEvent {
                         window_id: RootWindowId(window.into()),
@@ -370,23 +417,36 @@ pub fn create_delegate_class() {
     }
 
     let ui_responder = class!(UIResponder);
-    let mut decl = ClassDecl::new("AppDelegate", ui_responder).expect("Failed to declare class `AppDelegate`");
+    let mut decl =
+        ClassDecl::new("AppDelegate", ui_responder).expect("Failed to declare class `AppDelegate`");
 
     unsafe {
-        decl.add_method(sel!(application:didFinishLaunchingWithOptions:),
-                        did_finish_launching as extern fn(&mut Object, Sel, id, id) -> BOOL);
+        decl.add_method(
+            sel!(application:didFinishLaunchingWithOptions:),
+            did_finish_launching as extern "C" fn(&mut Object, Sel, id, id) -> BOOL,
+        );
 
-        decl.add_method(sel!(applicationDidBecomeActive:),
-                        did_become_active as extern fn(&Object, Sel, id));
-        decl.add_method(sel!(applicationWillResignActive:),
-                        will_resign_active as extern fn(&Object, Sel, id));
-        decl.add_method(sel!(applicationWillEnterForeground:),
-                        will_enter_foreground as extern fn(&Object, Sel, id));
-        decl.add_method(sel!(applicationDidEnterBackground:),
-                        did_enter_background as extern fn(&Object, Sel, id));
+        decl.add_method(
+            sel!(applicationDidBecomeActive:),
+            did_become_active as extern "C" fn(&Object, Sel, id),
+        );
+        decl.add_method(
+            sel!(applicationWillResignActive:),
+            will_resign_active as extern "C" fn(&Object, Sel, id),
+        );
+        decl.add_method(
+            sel!(applicationWillEnterForeground:),
+            will_enter_foreground as extern "C" fn(&Object, Sel, id),
+        );
+        decl.add_method(
+            sel!(applicationDidEnterBackground:),
+            did_enter_background as extern "C" fn(&Object, Sel, id),
+        );
 
-        decl.add_method(sel!(applicationWillTerminate:),
-                        will_terminate as extern fn(&Object, Sel, id));
+        decl.add_method(
+            sel!(applicationWillTerminate:),
+            will_terminate as extern "C" fn(&Object, Sel, id),
+        );
 
         decl.register();
     }

src/platform_impl/ios/window.rs

@@ -3,35 +3,21 @@ use std::{
     ops::{Deref, DerefMut},
 };
 
-use objc::runtime::{Class, NO, Object, YES};
+use objc::runtime::{Class, Object, NO, YES};
 
-use crate::dpi::{self, LogicalPosition, LogicalSize};
-use crate::error::{ExternalError, NotSupportedError, OsError as RootOsError};
-use crate::icon::Icon;
-use crate::monitor::MonitorHandle as RootMonitorHandle;
-use crate::platform::ios::{MonitorHandleExtIOS, ValidOrientations};
-use crate::window::{
-    CursorIcon,
-    WindowAttributes,
-};
-use crate::platform_impl::{
-    platform::{
+use crate::{
+    dpi::{self, LogicalPosition, LogicalSize},
+    error::{ExternalError, NotSupportedError, OsError as RootOsError},
+    icon::Icon,
+    monitor::MonitorHandle as RootMonitorHandle,
+    platform::ios::{MonitorHandleExtIOS, ValidOrientations},
+    platform_impl::platform::{
         app_state::AppState,
         event_loop,
-        ffi::{
-            id,
-            CGFloat,
-            CGPoint,
-            CGRect,
-            CGSize,
-            UIEdgeInsets,
-            UIInterfaceOrientationMask,
-        },
-        monitor,
-        view,
-        EventLoopWindowTarget,
-        MonitorHandle
+        ffi::{id, CGFloat, CGPoint, CGRect, CGSize, UIEdgeInsets, UIInterfaceOrientationMask},
+        monitor, view, EventLoopWindowTarget, MonitorHandle,
     },
+    window::{CursorIcon, WindowAttributes},
 };
 
 pub struct Inner {
@@ -59,10 +45,10 @@ impl Inner {
     pub fn set_visible(&self, visible: bool) {
         match visible {
             true => unsafe {
-                let () = msg_send![self.window, setHidden:NO];
+                let () = msg_send![self.window, setHidden: NO];
             },
             false => unsafe {
-                let () = msg_send![self.window, setHidden:YES];
+                let () = msg_send![self.window, setHidden: YES];
             },
         }
     }
@@ -104,7 +90,7 @@ impl Inner {
                 size: screen_frame.size,
             };
             let bounds = self.from_screen_space(new_screen_frame);
-            let () = msg_send![self.window, setBounds:bounds];
+            let () = msg_send![self.window, setBounds: bounds];
         }
     }
 
@@ -181,10 +167,10 @@ impl Inner {
 
                     // this is pretty slow on iOS, so avoid doing it if we can
                     if uiscreen != current {
-                        let () = msg_send![self.window, setScreen:uiscreen];
-                    }
-                    let () = msg_send![self.window, setFrame:bounds];
+                        let () = msg_send![self.window, setScreen: uiscreen];
                     }
+                    let () = msg_send![self.window, setFrame: bounds];
+                },
                 None => warn!("`Window::set_fullscreen(None)` ignored on iOS"),
             }
         }
@@ -213,7 +199,10 @@ impl Inner {
     pub fn set_decorations(&self, decorations: bool) {
         unsafe {
             let status_bar_hidden = if decorations { NO } else { YES };
-            let () = msg_send![self.view_controller, setPrefersStatusBarHidden:status_bar_hidden];
+            let () = msg_send![
+                self.view_controller,
+                setPrefersStatusBarHidden: status_bar_hidden
+            ];
         }
     }
 
@@ -232,20 +221,18 @@ impl Inner {
     pub fn current_monitor(&self) -> RootMonitorHandle {
         unsafe {
             let uiscreen: id = msg_send![self.window, screen];
-            RootMonitorHandle { inner: MonitorHandle::retained_new(uiscreen) }
+            RootMonitorHandle {
+                inner: MonitorHandle::retained_new(uiscreen),
+            }
         }
     }
 
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
-        unsafe {
-            monitor::uiscreens()
-        }
+        unsafe { monitor::uiscreens() }
     }
 
     pub fn primary_monitor(&self) -> MonitorHandle {
-        unsafe {
-            monitor::main_uiscreen()
-        }
+        unsafe { monitor::main_uiscreen() }
     }
 
     pub fn id(&self) -> WindowId {
@@ -306,23 +293,35 @@ impl Window {
         // TODO: transparency, visible
 
         unsafe {
-            let screen = window_attributes.fullscreen
+            let screen = window_attributes
+                .fullscreen
                 .as_ref()
                 .map(|screen| screen.ui_screen() as _)
                 .unwrap_or_else(|| monitor::main_uiscreen().ui_screen());
             let screen_bounds: CGRect = msg_send![screen, bounds];
 
             let frame = match window_attributes.inner_size {
-                Some(dim) => CGRect {
+                Some(dim) => {
+                    CGRect {
                         origin: screen_bounds.origin,
-                    size: CGSize { width: dim.width, height: dim.height },
+                        size: CGSize {
+                            width: dim.width,
+                            height: dim.height,
+                        },
+                    }
                 },
                 None => screen_bounds,
             };
 
             let view = view::create_view(&window_attributes, &platform_attributes, frame.clone());
-            let view_controller = view::create_view_controller(&window_attributes, &platform_attributes, view);
-            let window = view::create_window(&window_attributes, &platform_attributes, frame, view_controller);
+            let view_controller =
+                view::create_view_controller(&window_attributes, &platform_attributes, view);
+            let window = view::create_window(
+                &window_attributes,
+                &platform_attributes,
+                frame,
+                view_controller,
+            );
 
             let supports_safe_area = event_loop.capabilities().supports_safe_area;
 
@@ -342,23 +341,38 @@ impl Window {
 
 // WindowExtIOS
 impl Inner {
-    pub fn ui_window(&self) -> id { self.window }
-    pub fn ui_view_controller(&self) -> id { self.view_controller }
-    pub fn ui_view(&self) -> id { self.view }
+    pub fn ui_window(&self) -> id {
+        self.window
+    }
+    pub fn ui_view_controller(&self) -> id {
+        self.view_controller
+    }
+    pub fn ui_view(&self) -> id {
+        self.view
+    }
 
     pub fn set_hidpi_factor(&self, hidpi_factor: f64) {
         unsafe {
-            assert!(dpi::validate_hidpi_factor(hidpi_factor), "`WindowExtIOS::set_hidpi_factor` received an invalid hidpi factor");
+            assert!(
+                dpi::validate_hidpi_factor(hidpi_factor),
+                "`WindowExtIOS::set_hidpi_factor` received an invalid hidpi factor"
+            );
             let hidpi_factor = hidpi_factor as CGFloat;
-            let () = msg_send![self.view, setContentScaleFactor:hidpi_factor];
+            let () = msg_send![self.view, setContentScaleFactor: hidpi_factor];
         }
     }
 
     pub fn set_valid_orientations(&self, valid_orientations: ValidOrientations) {
         unsafe {
             let idiom = event_loop::get_idiom();
-            let supported_orientations = UIInterfaceOrientationMask::from_valid_orientations_idiom(valid_orientations, idiom);
-            msg_send![self.view_controller, setSupportedInterfaceOrientations:supported_orientations];
+            let supported_orientations = UIInterfaceOrientationMask::from_valid_orientations_idiom(
+                valid_orientations,
+                idiom,
+            );
+            msg_send![
+                self.view_controller,
+                setSupportedInterfaceOrientations: supported_orientations
+            ];
         }
     }
 }
@@ -411,14 +425,18 @@ impl Inner {
             let screen_frame = self.to_screen_space(bounds);
             let status_bar_frame: CGRect = {
                 let app: id = msg_send![class!(UIApplication), sharedApplication];
-                assert!(!app.is_null(), "`Window::get_inner_position` cannot be called before `EventLoop::run` on iOS");
+                assert!(
+                    !app.is_null(),
+                    "`Window::get_inner_position` cannot be called before `EventLoop::run` on iOS"
+                );
                 msg_send![app, statusBarFrame]
             };
             let (y, height) = if screen_frame.origin.y > status_bar_frame.size.height {
                 (screen_frame.origin.y, screen_frame.size.height)
             } else {
                 let y = status_bar_frame.size.height;
-                let height = screen_frame.size.height - (status_bar_frame.size.height - screen_frame.origin.y);
+                let height = screen_frame.size.height
+                    - (status_bar_frame.size.height - screen_frame.origin.y);
                 (y, height)
             };
             CGRect {
@@ -429,7 +447,7 @@ impl Inner {
                 size: CGSize {
                     width: screen_frame.size.width,
                     height,
-                }
+                },
             }
         }
     }
@@ -453,13 +471,17 @@ unsafe impl Sync for WindowId {}
 
 impl From<&Object> for WindowId {
     fn from(window: &Object) -> WindowId {
-        WindowId { window: window as *const _ as _ }
+        WindowId {
+            window: window as *const _ as _,
+        }
     }
 }
 
 impl From<&mut Object> for WindowId {
     fn from(window: &mut Object) -> WindowId {
-        WindowId { window: window as _ }
+        WindowId {
+            window: window as _,
+        }
     }
 }
 

src/platform_impl/linux/dlopen.rs

@@ -1,13 +1,13 @@
 #![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};
+use std::os::raw::{c_char, c_int, c_void};
 
 pub const RTLD_LAZY: c_int = 0x001;
 pub const RTLD_NOW: c_int = 0x002;
 
-#[link(name ="dl")]
-extern {
+#[link(name = "dl")]
+extern "C" {
     pub fn dlopen(filename: *const c_char, flag: c_int) -> *mut c_void;
     pub fn dlerror() -> *mut c_char;
     pub fn dlsym(handle: *mut c_void, symbol: *const c_char) -> *mut c_void;

src/platform_impl/linux/mod.rs

@@ -1,24 +1,21 @@
 #![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, fmt};
-use std::ffi::CStr;
-use std::os::raw::*;
-use std::sync::Arc;
+use std::{collections::VecDeque, env, ffi::CStr, fmt, mem, os::raw::*, sync::Arc};
 
 use parking_lot::Mutex;
 use smithay_client_toolkit::reexports::client::ConnectError;
 
-use crate::dpi::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize};
-use crate::icon::Icon;
-use crate::error::{ExternalError, NotSupportedError, OsError as RootOsError};
-use crate::event::Event;
-use crate::event_loop::{EventLoopClosed, ControlFlow, EventLoopWindowTarget as RootELW};
-use crate::monitor::{MonitorHandle as RootMonitorHandle, VideoMode};
-use crate::window::{WindowAttributes, CursorIcon};
-use self::x11::{XConnection, XError};
-use self::x11::ffi::XVisualInfo;
 pub use self::x11::XNotSupported;
+use self::x11::{ffi::XVisualInfo, XConnection, XError};
+use crate::{
+    dpi::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize},
+    error::{ExternalError, NotSupportedError, OsError as RootOsError},
+    event::Event,
+    event_loop::{ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootELW},
+    icon::Icon,
+    monitor::{MonitorHandle as RootMonitorHandle, VideoMode},
+    window::{CursorIcon, WindowAttributes},
+};
 
 mod dlopen;
 pub mod wayland;
@@ -43,14 +40,13 @@ pub struct PlatformSpecificWindowBuilderAttributes {
     pub override_redirect: bool,
     pub x11_window_type: x11::util::WindowType,
     pub gtk_theme_variant: Option<String>,
-    pub app_id: Option<String>
+    pub app_id: Option<String>,
 }
 
-lazy_static!(
-    pub static ref X11_BACKEND: Mutex<Result<Arc<XConnection>, XNotSupported>> = {
-        Mutex::new(XConnection::new(Some(x_error_callback)).map(Arc::new))
-    };
-);
+lazy_static! {
+    pub static ref X11_BACKEND: Mutex<Result<Arc<XConnection>, XNotSupported>> =
+        { Mutex::new(XConnection::new(Some(x_error_callback)).map(Arc::new)) };
+}
 
 #[derive(Debug, Clone)]
 pub enum OsError {
@@ -269,7 +265,7 @@ impl Window {
     pub fn set_cursor_icon(&self, cursor: CursorIcon) {
         match self {
             &Window::X(ref w) => w.set_cursor_icon(cursor),
-            &Window::Wayland(ref w) => w.set_cursor_icon(cursor)
+            &Window::Wayland(ref w) => w.set_cursor_icon(cursor),
         }
     }
 
@@ -317,8 +313,13 @@ impl Window {
     pub fn fullscreen(&self) -> Option<RootMonitorHandle> {
         match self {
             &Window::X(ref w) => w.fullscreen(),
-            &Window::Wayland(ref w) => w.fullscreen()
-                .map(|monitor_id| RootMonitorHandle { inner: MonitorHandle::Wayland(monitor_id) })
+            &Window::Wayland(ref w) => {
+                w.fullscreen().map(|monitor_id| {
+                    RootMonitorHandle {
+                        inner: MonitorHandle::Wayland(monitor_id),
+                    }
+                })
+            },
         }
     }
 
@@ -326,7 +327,7 @@ impl Window {
     pub fn set_fullscreen(&self, monitor: Option<RootMonitorHandle>) {
         match self {
             &Window::X(ref w) => w.set_fullscreen(monitor),
-            &Window::Wayland(ref w) => w.set_fullscreen(monitor)
+            &Window::Wayland(ref w) => w.set_fullscreen(monitor),
         }
     }
 
@@ -334,7 +335,7 @@ impl Window {
     pub fn set_decorations(&self, decorations: bool) {
         match self {
             &Window::X(ref w) => w.set_decorations(decorations),
-            &Window::Wayland(ref w) => w.set_decorations(decorations)
+            &Window::Wayland(ref w) => w.set_decorations(decorations),
         }
     }
 
@@ -373,22 +374,36 @@ impl Window {
     #[inline]
     pub fn current_monitor(&self) -> RootMonitorHandle {
         match self {
-            &Window::X(ref window) => RootMonitorHandle { inner: MonitorHandle::X(window.current_monitor()) },
-            &Window::Wayland(ref window) => RootMonitorHandle { inner: MonitorHandle::Wayland(window.current_monitor()) },
+            &Window::X(ref window) => {
+                RootMonitorHandle {
+                    inner: MonitorHandle::X(window.current_monitor()),
+                }
+            },
+            &Window::Wayland(ref window) => {
+                RootMonitorHandle {
+                    inner: MonitorHandle::Wayland(window.current_monitor()),
+                }
+            },
         }
     }
 
     #[inline]
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         match self {
-            &Window::X(ref window) => window.available_monitors()
+            &Window::X(ref window) => {
+                window
+                    .available_monitors()
                     .into_iter()
                     .map(MonitorHandle::X)
-                .collect(),
-            &Window::Wayland(ref window) => window.available_monitors()
+                    .collect()
+            },
+            &Window::Wayland(ref window) => {
+                window
+                    .available_monitors()
                     .into_iter()
                     .map(MonitorHandle::Wayland)
-                .collect(),
+                    .collect()
+            },
         }
     }
 
@@ -401,7 +416,6 @@ impl Window {
     }
 }
 
-
 unsafe extern "C" fn x_error_callback(
     display: *mut x11::ffi::Display,
     event: *mut x11::ffi::XErrorEvent,
@@ -432,10 +446,9 @@ unsafe extern "C" fn x_error_callback(
     0
 }
 
-
 pub enum EventLoop<T: 'static> {
     Wayland(wayland::EventLoop<T>),
-    X(x11::EventLoop<T>)
+    X(x11::EventLoop<T>),
 }
 
 #[derive(Clone)]
@@ -444,7 +457,7 @@ pub enum EventLoopProxy<T: 'static> {
     Wayland(wayland::EventLoopProxy<T>),
 }
 
-impl<T:'static> EventLoop<T> {
+impl<T: 'static> EventLoop<T> {
     pub fn new() -> EventLoop<T> {
         if let Ok(env_var) = env::var(BACKEND_PREFERENCE_ENV_VAR) {
             match env_var.as_str() {
@@ -453,13 +466,14 @@ impl<T:'static> EventLoop<T> {
                     return EventLoop::new_x11().expect("Failed to initialize X11 backend");
                 },
                 "wayland" => {
-                    return EventLoop::new_wayland()
-                        .expect("Failed to initialize Wayland backend");
+                    return EventLoop::new_wayland().expect("Failed to initialize Wayland backend");
                 },
-                _ => panic!(
+                _ => {
+                    panic!(
                         "Unknown environment variable value for {}, try one of `x11`,`wayland`",
                         BACKEND_PREFERENCE_ENV_VAR,
-                ),
+                    )
+                },
             }
         }
 
@@ -475,15 +489,13 @@ impl<T:'static> EventLoop<T> {
 
         let err_string = format!(
             "Failed to initialize any backend! Wayland status: {:?} X11 status: {:?}",
-            wayland_err,
-            x11_err,
+            wayland_err, x11_err,
         );
         panic!(err_string);
     }
 
     pub fn new_wayland() -> Result<EventLoop<T>, ConnectError> {
-        wayland::EventLoop::new()
-            .map(EventLoop::Wayland)
+        wayland::EventLoop::new().map(EventLoop::Wayland)
     }
 
     pub fn new_x11() -> Result<EventLoop<T>, XNotSupported> {
@@ -499,17 +511,19 @@ impl<T:'static> EventLoop<T> {
     #[inline]
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         match *self {
-            EventLoop::Wayland(ref evlp) => evlp
-                .available_monitors()
+            EventLoop::Wayland(ref evlp) => {
+                evlp.available_monitors()
                     .into_iter()
                     .map(MonitorHandle::Wayland)
-                .collect(),
-            EventLoop::X(ref evlp) => evlp
-                .x_connection()
+                    .collect()
+            },
+            EventLoop::X(ref evlp) => {
+                evlp.x_connection()
                     .available_monitors()
                     .into_iter()
                     .map(MonitorHandle::X)
-                .collect(),
+                    .collect()
+            },
         }
     }
 
@@ -529,20 +543,22 @@ impl<T:'static> EventLoop<T> {
     }
 
     pub fn run_return<F>(&mut self, callback: F)
-        where F: FnMut(crate::event::Event<T>, &RootELW<T>, &mut ControlFlow)
+    where
+        F: FnMut(crate::event::Event<T>, &RootELW<T>, &mut ControlFlow),
     {
         match *self {
             EventLoop::Wayland(ref mut evlp) => evlp.run_return(callback),
-            EventLoop::X(ref mut evlp) => evlp.run_return(callback)
+            EventLoop::X(ref mut evlp) => evlp.run_return(callback),
         }
     }
 
     pub fn run<F>(self, callback: F) -> !
-        where F: 'static + FnMut(crate::event::Event<T>, &RootELW<T>, &mut ControlFlow)
+    where
+        F: 'static + FnMut(crate::event::Event<T>, &RootELW<T>, &mut ControlFlow),
     {
         match self {
             EventLoop::Wayland(evlp) => evlp.run(callback),
-            EventLoop::X(evlp) => evlp.run(callback)
+            EventLoop::X(evlp) => evlp.run(callback),
         }
     }
 
@@ -557,7 +573,7 @@ impl<T:'static> EventLoop<T> {
     pub fn window_target(&self) -> &crate::event_loop::EventLoopWindowTarget<T> {
         match *self {
             EventLoop::Wayland(ref evl) => evl.window_target(),
-            EventLoop::X(ref evl) => evl.window_target()
+            EventLoop::X(ref evl) => evl.window_target(),
         }
     }
 }
@@ -573,12 +589,16 @@ impl<T: 'static> EventLoopProxy<T> {
 
 pub enum EventLoopWindowTarget<T> {
     Wayland(wayland::EventLoopWindowTarget<T>),
-    X(x11::EventLoopWindowTarget<T>)
+    X(x11::EventLoopWindowTarget<T>),
 }
 
 fn sticky_exit_callback<T, F>(
-    evt: Event<T>, target: &RootELW<T>, control_flow: &mut ControlFlow, callback: &mut F
-) where F: FnMut(Event<T>, &RootELW<T>, &mut ControlFlow)
+    evt: Event<T>,
+    target: &RootELW<T>,
+    control_flow: &mut ControlFlow,
+    callback: &mut F,
+) where
+    F: FnMut(Event<T>, &RootELW<T>, &mut ControlFlow),
 {
     // make ControlFlow::Exit sticky by providing a dummy
     // control flow reference if it is already Exit.

src/platform_impl/linux/wayland/event_loop.rs

@@ -1,25 +1,30 @@
-use std::cell::RefCell;
-use std::collections::VecDeque;
-use std::fmt;
-use std::rc::Rc;
-use std::sync::{Arc, Mutex};
-use std::time::Instant;
-
-use crate::event_loop::{ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootELW};
-use crate::event::ModifiersState;
-use crate::dpi::{PhysicalPosition, PhysicalSize};
-use crate::platform_impl::platform::sticky_exit_callback;
-use crate::monitor::VideoMode;
-
-use super::window::WindowStore;
-use super::WindowId;
-
-use smithay_client_toolkit::output::OutputMgr;
-use smithay_client_toolkit::reexports::client::protocol::{
-    wl_keyboard, wl_output, wl_pointer, wl_registry, wl_seat, wl_touch,
+use std::{
+    cell::RefCell,
+    collections::VecDeque,
+    fmt,
+    rc::Rc,
+    sync::{Arc, Mutex},
+    time::Instant,
+};
+
+use crate::{
+    dpi::{PhysicalPosition, PhysicalSize},
+    event::ModifiersState,
+    event_loop::{ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootELW},
+    monitor::VideoMode,
+    platform_impl::platform::sticky_exit_callback,
+};
+
+use super::{window::WindowStore, WindowId};
+
+use smithay_client_toolkit::{
+    output::OutputMgr,
+    reexports::client::{
+        protocol::{wl_keyboard, wl_output, wl_pointer, wl_registry, wl_seat, wl_touch},
+        ConnectError, Display, EventQueue, GlobalEvent,
+    },
+    Environment,
 };
-use smithay_client_toolkit::reexports::client::{ConnectError, Display, EventQueue, GlobalEvent};
-use smithay_client_toolkit::Environment;
 
 pub struct WindowEventsSink {
     buffer: VecDeque<(crate::event::WindowEvent, crate::window::WindowId)>,
@@ -33,7 +38,10 @@ impl WindowEventsSink {
     }
 
     pub fn send_event(&mut self, evt: crate::event::WindowEvent, wid: WindowId) {
-        self.buffer.push_back((evt, crate::window::WindowId(crate::platform_impl::WindowId::Wayland(wid))));
+        self.buffer.push_back((
+            evt,
+            crate::window::WindowId(crate::platform_impl::WindowId::Wayland(wid)),
+        ));
     }
 
     fn empty_with<F, T>(&mut self, mut callback: F)
@@ -41,7 +49,10 @@ impl WindowEventsSink {
         F: FnMut(crate::event::Event<T>),
     {
         for (evt, wid) in self.buffer.drain(..) {
-            callback(crate::event::Event::WindowEvent { event: evt, window_id: wid})
+            callback(crate::event::Event::WindowEvent {
+                event: evt,
+                window_id: wid,
+            })
         }
     }
 }
@@ -58,8 +69,10 @@ pub struct EventLoop<T: 'static> {
     pending_user_events: Rc<RefCell<VecDeque<T>>>,
     _user_source: ::calloop::Source<::calloop::channel::Channel<T>>,
     user_sender: ::calloop::channel::Sender<T>,
-    _kbd_source: ::calloop::Source<::calloop::channel::Channel<(crate::event::WindowEvent, super::WindowId)>>,
-    window_target: RootELW<T>
+    _kbd_source: ::calloop::Source<
+        ::calloop::channel::Channel<(crate::event::WindowEvent, super::WindowId)>,
+    >,
+    window_target: RootELW<T>,
 }
 
 // A handle that can be sent across threads and used to wake up the `EventLoop`.
@@ -67,7 +80,7 @@ pub struct EventLoop<T: 'static> {
 // We should only try and wake up the `EventLoop` if it still exists, so we hold Weak ptrs.
 #[derive(Clone)]
 pub struct EventLoopProxy<T: 'static> {
-    user_sender: ::calloop::channel::Sender<T>
+    user_sender: ::calloop::channel::Sender<T>,
 }
 
 pub struct EventLoopWindowTarget<T> {
@@ -83,7 +96,7 @@ pub struct EventLoopWindowTarget<T> {
     pub display: Arc<Display>,
     // The list of seats
     pub seats: Arc<Mutex<Vec<(u32, wl_seat::WlSeat)>>>,
-    _marker: ::std::marker::PhantomData<T>
+    _marker: ::std::marker::PhantomData<T>,
 }
 
 impl<T: 'static> EventLoopProxy<T> {
@@ -105,11 +118,14 @@ impl<T: 'static> EventLoop<T> {
 
         let (kbd_sender, kbd_channel) = ::calloop::channel::channel();
         let kbd_sink = sink.clone();
-        let kbd_source = inner_loop.handle().insert_source(kbd_channel, move |evt, &mut()| {
+        let kbd_source = inner_loop
+            .handle()
+            .insert_source(kbd_channel, move |evt, &mut ()| {
                 if let ::calloop::channel::Event::Msg((evt, wid)) = evt {
                     kbd_sink.lock().unwrap().send_event(evt, wid);
                 }
-        }).unwrap();
+            })
+            .unwrap();
 
         let mut seat_manager = SeatManager {
             sink: sink.clone(),
@@ -123,7 +139,11 @@ impl<T: 'static> EventLoop<T> {
             &mut event_queue,
             move |event, registry| {
                 match event {
-                    GlobalEvent::New { id, ref interface, version } => {
+                    GlobalEvent::New {
+                        id,
+                        ref interface,
+                        version,
+                    } => {
                         if interface == "wl_seat" {
                             seat_manager.add_seat(id, version, registry)
                         }
@@ -135,20 +155,27 @@ impl<T: 'static> EventLoop<T> {
                     },
                 }
             },
-        ).unwrap();
+        )
+        .unwrap();
 
-        let source = inner_loop.handle().insert_source(event_queue, |(), &mut ()| {}).unwrap();
+        let source = inner_loop
+            .handle()
+            .insert_source(event_queue, |(), &mut ()| {})
+            .unwrap();
 
         let pending_user_events = Rc::new(RefCell::new(VecDeque::new()));
         let pending_user_events2 = pending_user_events.clone();
 
         let (user_sender, user_channel) = ::calloop::channel::channel();
 
-        let user_source = inner_loop.handle().insert_source(user_channel, move |evt, &mut()| {
+        let user_source = inner_loop
+            .handle()
+            .insert_source(user_channel, move |evt, &mut ()| {
                 if let ::calloop::channel::Event::Msg(msg) = evt {
                     pending_user_events2.borrow_mut().push_back(msg);
                 }
-        }).unwrap();
+            })
+            .unwrap();
 
         Ok(EventLoop {
             inner_loop,
@@ -167,28 +194,30 @@ impl<T: 'static> EventLoop<T> {
                     cleanup_needed: Arc::new(Mutex::new(false)),
                     seats,
                     display,
-                    _marker: ::std::marker::PhantomData
+                    _marker: ::std::marker::PhantomData,
                 }),
-                _marker: ::std::marker::PhantomData
-            }
+                _marker: ::std::marker::PhantomData,
+            },
         })
     }
 
     pub fn create_proxy(&self) -> EventLoopProxy<T> {
         EventLoopProxy {
-            user_sender: self.user_sender.clone()
+            user_sender: self.user_sender.clone(),
         }
     }
 
     pub fn run<F>(mut self, callback: F) -> !
-        where F: 'static + FnMut(crate::event::Event<T>, &RootELW<T>, &mut ControlFlow)
+    where
+        F: 'static + FnMut(crate::event::Event<T>, &RootELW<T>, &mut ControlFlow),
     {
         self.run_return(callback);
         ::std::process::exit(0);
     }
 
     pub fn run_return<F>(&mut self, mut callback: F)
-        where F: FnMut(crate::event::Event<T>, &RootELW<T>, &mut ControlFlow)
+    where
+        F: FnMut(crate::event::Event<T>, &RootELW<T>, &mut ControlFlow),
     {
         // send pending events to the server
         self.display.flush().expect("Wayland connection lost.");
@@ -198,7 +227,11 @@ impl<T: 'static> EventLoop<T> {
         let sink = self.sink.clone();
         let user_events = self.pending_user_events.clone();
 
-        callback(crate::event::Event::NewEvents(crate::event::StartCause::Init), &self.window_target, &mut control_flow);
+        callback(
+            crate::event::Event::NewEvents(crate::event::StartCause::Init),
+            &self.window_target,
+            &mut control_flow,
+        );
 
         loop {
             self.post_dispatch_triggers();
@@ -207,7 +240,12 @@ impl<T: 'static> EventLoop<T> {
             {
                 let mut guard = sink.lock().unwrap();
                 guard.empty_with(|evt| {
-                    sticky_exit_callback(evt, &self.window_target, &mut control_flow, &mut callback);
+                    sticky_exit_callback(
+                        evt,
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
                 });
             }
             // empty user events
@@ -218,7 +256,7 @@ impl<T: 'static> EventLoop<T> {
                         crate::event::Event::UserEvent(evt),
                         &self.window_target,
                         &mut control_flow,
-                        &mut callback
+                        &mut callback,
                     );
                 }
             }
@@ -228,7 +266,12 @@ impl<T: 'static> EventLoop<T> {
             {
                 let mut guard = sink.lock().unwrap();
                 guard.empty_with(|evt| {
-                    sticky_exit_callback(evt, &self.window_target, &mut control_flow, &mut callback);
+                    sticky_exit_callback(
+                        evt,
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
                 });
             }
             // send Events cleared
@@ -237,7 +280,7 @@ impl<T: 'static> EventLoop<T> {
                     crate::event::Event::EventsCleared,
                     &self.window_target,
                     &mut control_flow,
-                    &mut callback
+                    &mut callback,
                 );
             }
 
@@ -248,18 +291,24 @@ impl<T: 'static> EventLoop<T> {
                 ControlFlow::Exit => break,
                 ControlFlow::Poll => {
                     // non-blocking dispatch
-                    self.inner_loop.dispatch(Some(::std::time::Duration::from_millis(0)), &mut ()).unwrap();
-                    callback(crate::event::Event::NewEvents(crate::event::StartCause::Poll), &self.window_target, &mut control_flow);
+                    self.inner_loop
+                        .dispatch(Some(::std::time::Duration::from_millis(0)), &mut ())
+                        .unwrap();
+                    callback(
+                        crate::event::Event::NewEvents(crate::event::StartCause::Poll),
+                        &self.window_target,
+                        &mut control_flow,
+                    );
                 },
                 ControlFlow::Wait => {
                     self.inner_loop.dispatch(None, &mut ()).unwrap();
                     callback(
                         crate::event::Event::NewEvents(crate::event::StartCause::WaitCancelled {
                             start: Instant::now(),
-                            requested_resume: None
+                            requested_resume: None,
                         }),
                         &self.window_target,
-                        &mut control_flow
+                        &mut control_flow,
                     );
                 },
                 ControlFlow::WaitUntil(deadline) => {
@@ -274,28 +323,36 @@ impl<T: 'static> EventLoop<T> {
                     let now = Instant::now();
                     if now < deadline {
                         callback(
-                            crate::event::Event::NewEvents(crate::event::StartCause::WaitCancelled {
+                            crate::event::Event::NewEvents(
+                                crate::event::StartCause::WaitCancelled {
                                     start,
-                                requested_resume: Some(deadline)
-                            }),
+                                    requested_resume: Some(deadline),
+                                },
+                            ),
                             &self.window_target,
-                            &mut control_flow
+                            &mut control_flow,
                         );
                     } else {
                         callback(
-                            crate::event::Event::NewEvents(crate::event::StartCause::ResumeTimeReached {
+                            crate::event::Event::NewEvents(
+                                crate::event::StartCause::ResumeTimeReached {
                                     start,
-                                requested_resume: deadline
-                            }),
+                                    requested_resume: deadline,
+                                },
+                            ),
                             &self.window_target,
-                            &mut control_flow
+                            &mut control_flow,
                         );
                     }
                 },
             }
         }
 
-        callback(crate::event::Event::LoopDestroyed, &self.window_target, &mut control_flow);
+        callback(
+            crate::event::Event::LoopDestroyed,
+            &self.window_target,
+            &mut control_flow,
+        );
     }
 
     pub fn primary_monitor(&self) -> MonitorHandle {
@@ -324,7 +381,7 @@ impl<T> EventLoop<T> {
         let mut sink = self.sink.lock().unwrap();
         let window_target = match self.window_target.p {
             crate::platform_impl::EventLoopWindowTarget::Wayland(ref wt) => wt,
-            _ => unreachable!()
+            _ => unreachable!(),
         };
         // prune possible dead windows
         {
@@ -355,7 +412,10 @@ impl<T> EventLoop<T> {
                     }
                 }
                 if let Some(dpi) = new_dpi {
-                    sink.send_event(crate::event::WindowEvent::HiDpiFactorChanged(dpi as f64), wid);
+                    sink.send_event(
+                        crate::event::WindowEvent::HiDpiFactorChanged(dpi as f64),
+                        wid,
+                    );
                 }
                 if refresh {
                     sink.send_event(crate::event::WindowEvent::RedrawRequested, wid);
@@ -376,7 +436,7 @@ struct SeatManager {
     sink: Arc<Mutex<WindowEventsSink>>,
     store: Arc<Mutex<WindowStore>>,
     seats: Arc<Mutex<Vec<(u32, wl_seat::WlSeat)>>>,
-    kbd_sender: ::calloop::channel::Sender<(crate::event::WindowEvent, super::WindowId)>
+    kbd_sender: ::calloop::channel::Sender<(crate::event::WindowEvent, super::WindowId)>,
 }
 
 impl SeatManager {
@@ -394,9 +454,7 @@ impl SeatManager {
         };
         let seat = registry
             .bind(min(version, 5), id, move |seat| {
-                seat.implement_closure(move |event, seat| {
-                    seat_data.receive(event, seat)
-                }, ())
+                seat.implement_closure(move |event, seat| seat_data.receive(event, seat), ())
             })
             .unwrap();
         self.store.lock().unwrap().new_seat(&seat);
@@ -479,7 +537,7 @@ impl SeatData {
                     }
                 }
             },
-            _ => unreachable!()
+            _ => unreachable!(),
         }
     }
 }
@@ -566,7 +624,8 @@ impl MonitorHandle {
         }) {
             Some(Some((w, h))) => (w as u32, h as u32),
             _ => (0, 0),
-        }.into()
+        }
+        .into()
     }
 
     pub fn position(&self) -> PhysicalPosition {
@@ -584,16 +643,17 @@ impl MonitorHandle {
     }
 
     #[inline]
-    pub fn video_modes(&self) -> impl Iterator<Item = VideoMode>
-    {
+    pub fn video_modes(&self) -> impl Iterator<Item = VideoMode> {
         self.mgr
             .with_info(&self.proxy, |_, info| info.modes.clone())
             .unwrap_or(vec![])
             .into_iter()
-            .map(|x| VideoMode {
+            .map(|x| {
+                VideoMode {
                     size: (x.dimensions.0 as u32, x.dimensions.1 as u32),
                     refresh_rate: (x.refresh_rate as f32 / 1000.0).round() as u16,
-                bit_depth: 32
+                    bit_depth: 32,
+                }
             })
     }
 }
@@ -614,9 +674,11 @@ pub fn primary_monitor(outputs: &OutputMgr) -> MonitorHandle {
 pub fn available_monitors(outputs: &OutputMgr) -> VecDeque<MonitorHandle> {
     outputs.with_all(|list| {
         list.iter()
-            .map(|&(_, ref proxy, _)| MonitorHandle {
+            .map(|&(_, ref proxy, _)| {
+                MonitorHandle {
                     proxy: proxy.clone(),
                     mgr: outputs.clone(),
+                }
             })
             .collect()
     })

src/platform_impl/linux/wayland/keyboard.rs

@@ -1,10 +1,12 @@
 use std::sync::{Arc, Mutex};
 
 use super::{make_wid, DeviceId};
-use smithay_client_toolkit::keyboard::{
+use smithay_client_toolkit::{
+    keyboard::{
         self, map_keyboard_auto_with_repeat, Event as KbEvent, KeyRepeatEvent, KeyRepeatKind,
+    },
+    reexports::client::protocol::{wl_keyboard, wl_seat},
 };
-use smithay_client_toolkit::reexports::client::protocol::{wl_keyboard, wl_seat};
 
 use crate::event::{ElementState, KeyboardInput, ModifiersState, VirtualKeyCode, WindowEvent};
 
@@ -23,17 +25,18 @@ pub fn init_keyboard(
     let ret = map_keyboard_auto_with_repeat(
         seat,
         KeyRepeatKind::System,
-        move |evt: KbEvent<'_>, _| match evt {
+        move |evt: KbEvent<'_>, _| {
+            match evt {
                 KbEvent::Enter { surface, .. } => {
                     let wid = make_wid(&surface);
                     my_sink.send((WindowEvent::Focused(true), wid)).unwrap();
                     *target.lock().unwrap() = Some(wid);
-            }
+                },
                 KbEvent::Leave { surface, .. } => {
                     let wid = make_wid(&surface);
                     my_sink.send((WindowEvent::Focused(false), wid)).unwrap();
                     *target.lock().unwrap() = None;
-            }
+                },
                 KbEvent::Key {
                     rawkey,
                     keysym,
@@ -48,53 +51,66 @@ pub fn init_keyboard(
                             _ => unreachable!(),
                         };
                         let vkcode = key_to_vkey(rawkey, keysym);
-                    my_sink.send(
-                        (WindowEvent::KeyboardInput {
-                            device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                        my_sink
+                            .send((
+                                WindowEvent::KeyboardInput {
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
                                     input: KeyboardInput {
-                                state: state,
+                                        state,
                                         scancode: rawkey,
                                         virtual_keycode: vkcode,
                                         modifiers: modifiers_tracker.lock().unwrap().clone(),
                                     },
                                 },
-                        wid)
-                    ).unwrap();
+                                wid,
+                            ))
+                            .unwrap();
                         // send char event only on key press, not release
                         if let ElementState::Released = state {
                             return;
                         }
                         if let Some(txt) = utf8 {
                             for chr in txt.chars() {
-                            my_sink.send((WindowEvent::ReceivedCharacter(chr), wid)).unwrap();
+                                my_sink
+                                    .send((WindowEvent::ReceivedCharacter(chr), wid))
+                                    .unwrap();
                             }
                         }
                     }
-            }
-            KbEvent::RepeatInfo { .. } => { /* Handled by smithay client toolkit */ }
-            KbEvent::Modifiers { modifiers: event_modifiers } => {
-                *modifiers_tracker.lock().unwrap() = event_modifiers.into()
                 },
+                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);
-                repeat_sink.send((
+                repeat_sink
+                    .send((
                         WindowEvent::KeyboardInput {
-                        device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                            device_id: crate::event::DeviceId(
+                                crate::platform_impl::DeviceId::Wayland(DeviceId),
+                            ),
                             input: KeyboardInput {
-                            state: state,
+                                state,
                                 scancode: repeat_event.rawkey,
                                 virtual_keycode: vkcode,
                                 modifiers: my_modifiers.lock().unwrap().clone(),
                             },
                         },
-                    wid)
-                ).unwrap();
+                        wid,
+                    ))
+                    .unwrap();
                 if let Some(txt) = repeat_event.utf8 {
                     for chr in txt.chars() {
-                        repeat_sink.send((WindowEvent::ReceivedCharacter(chr), wid)).unwrap();
+                        repeat_sink
+                            .send((WindowEvent::ReceivedCharacter(chr), wid))
+                            .unwrap();
                     }
                 }
             }
@@ -116,42 +132,54 @@ pub fn init_keyboard(
             let my_sink = sink;
             // }
             seat.get_keyboard(|keyboard| {
-                keyboard.implement_closure(move |evt, _| match evt {
+                keyboard.implement_closure(
+                    move |evt, _| {
+                        match evt {
                             wl_keyboard::Event::Enter { surface, .. } => {
                                 let wid = make_wid(&surface);
                                 my_sink.send((WindowEvent::Focused(true), wid)).unwrap();
                                 target = Some(wid);
-                    }
+                            },
                             wl_keyboard::Event::Leave { surface, .. } => {
                                 let wid = make_wid(&surface);
                                 my_sink.send((WindowEvent::Focused(false), wid)).unwrap();
                                 target = None;
-                    }
+                            },
                             wl_keyboard::Event::Key { key, state, .. } => {
                                 if let Some(wid) = target {
                                     let state = match state {
                                         wl_keyboard::KeyState::Pressed => ElementState::Pressed,
                                         wl_keyboard::KeyState::Released => ElementState::Released,
-                                _ => unreachable!()
+                                        _ => unreachable!(),
                                     };
-                            my_sink.send((
+                                    my_sink
+                                        .send((
                                             WindowEvent::KeyboardInput {
-                                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                                device_id: crate::event::DeviceId(
+                                                    crate::platform_impl::DeviceId::Wayland(
+                                                        DeviceId,
+                                                    ),
+                                                ),
                                                 input: KeyboardInput {
-                                        state: state,
+                                                    state,
                                                     scancode: key,
                                                     virtual_keycode: None,
                                                     modifiers: ModifiersState::default(),
                                                 },
                                             },
                                             wid,
-                            )).unwrap();
-                        }
+                                        ))
+                                        .unwrap();
                                 }
+                            },
                             _ => (),
-                }, ())
-            }).unwrap()
                         }
+                    },
+                    (),
+                )
+            })
+            .unwrap()
+        },
     }
 }
 

src/platform_impl/linux/wayland/mod.rs

@@ -1,15 +1,19 @@
 #![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd",
            target_os = "netbsd", target_os = "openbsd"))]
 
-pub use self::window::Window;
-pub use self::event_loop::{EventLoop, EventLoopWindowTarget, EventLoopProxy, WindowEventsSink, MonitorHandle};
+pub use self::{
+    event_loop::{
+        EventLoop, EventLoopProxy, EventLoopWindowTarget, MonitorHandle, WindowEventsSink,
+    },
+    window::Window,
+};
 
 use smithay_client_toolkit::reexports::client::protocol::wl_surface;
 
 mod event_loop;
+mod keyboard;
 mod pointer;
 mod touch;
-mod keyboard;
 mod window;
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

src/platform_impl/linux/wayland/pointer.rs

@@ -1,13 +1,15 @@
 use std::sync::{Arc, Mutex};
 
-use crate::event::{ElementState, MouseButton, MouseScrollDelta, TouchPhase, WindowEvent, ModifiersState};
+use crate::event::{
+    ElementState, ModifiersState, MouseButton, MouseScrollDelta, TouchPhase, WindowEvent,
+};
 
-use super::DeviceId;
-use super::event_loop::WindowEventsSink;
-use super::window::WindowStore;
+use super::{event_loop::WindowEventsSink, window::WindowStore, DeviceId};
 
-use smithay_client_toolkit::reexports::client::protocol::wl_pointer::{self, Event as PtrEvent, WlPointer};
-use smithay_client_toolkit::reexports::client::protocol::wl_seat;
+use smithay_client_toolkit::reexports::client::protocol::{
+    wl_pointer::{self, Event as PtrEvent, WlPointer},
+    wl_seat,
+};
 
 pub fn implement_pointer(
     seat: &wl_seat::WlSeat,
@@ -21,7 +23,8 @@ pub fn implement_pointer(
     let mut axis_state = TouchPhase::Ended;
 
     seat.get_pointer(|pointer| {
-        pointer.implement_closure(move |evt, pointer| {
+        pointer.implement_closure(
+            move |evt, pointer| {
                 let mut sink = sink.lock().unwrap();
                 let store = store.lock().unwrap();
                 match evt {
@@ -36,32 +39,38 @@ pub fn implement_pointer(
                             mouse_focus = Some(wid);
                             sink.send_event(
                                 WindowEvent::CursorEntered {
-                                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
                                 },
                                 wid,
                             );
                             sink.send_event(
                                 WindowEvent::CursorMoved {
-                                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
                                     position: (surface_x, surface_y).into(),
                                     modifiers: modifiers_tracker.lock().unwrap().clone(),
                                 },
                                 wid,
                             );
                         }
-                }
+                    },
                     PtrEvent::Leave { surface, .. } => {
                         mouse_focus = None;
                         let wid = store.find_wid(&surface);
                         if let Some(wid) = wid {
                             sink.send_event(
                                 WindowEvent::CursorLeft {
-                                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
                                 },
                                 wid,
                             );
                         }
-                }
+                    },
                     PtrEvent::Motion {
                         surface_x,
                         surface_y,
@@ -70,20 +79,22 @@ pub fn implement_pointer(
                         if let Some(wid) = mouse_focus {
                             sink.send_event(
                                 WindowEvent::CursorMoved {
-                                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::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,
-                            _ => unreachable!()
+                                _ => unreachable!(),
                             };
                             let button = match button {
                                 0x110 => MouseButton::Left,
@@ -94,15 +105,17 @@ pub fn implement_pointer(
                             };
                             sink.send_event(
                                 WindowEvent::MouseInput {
-                                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
-                                state: state,
-                                button: button,
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
+                                    state,
+                                    button,
                                     modifiers: modifiers_tracker.lock().unwrap().clone(),
                                 },
                                 wid,
                             );
                         }
-                }
+                    },
                     PtrEvent::Axis { axis, value, .. } => {
                         if let Some(wid) = mouse_focus {
                             if pointer.as_ref().version() < 5 {
@@ -112,12 +125,16 @@ pub fn implement_pointer(
                                     // wayland vertical sign convention is the inverse of winit
                                     wl_pointer::Axis::VerticalScroll => y -= value as f32,
                                     wl_pointer::Axis::HorizontalScroll => x += value as f32,
-                                _ => unreachable!()
+                                    _ => unreachable!(),
                                 }
                                 sink.send_event(
                                     WindowEvent::MouseWheel {
-                                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
-                                    delta: MouseScrollDelta::PixelDelta((x as f64, y as f64).into()),
+                                        device_id: crate::event::DeviceId(
+                                            crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                        ),
+                                        delta: MouseScrollDelta::PixelDelta(
+                                            (x as f64, y as f64).into(),
+                                        ),
                                         phase: TouchPhase::Moved,
                                         modifiers: modifiers_tracker.lock().unwrap().clone(),
                                     },
@@ -129,7 +146,7 @@ pub fn implement_pointer(
                                     // wayland vertical sign convention is the inverse of winit
                                     wl_pointer::Axis::VerticalScroll => y -= value as f32,
                                     wl_pointer::Axis::HorizontalScroll => x += value as f32,
-                                _ => unreachable!()
+                                    _ => unreachable!(),
                                 }
                                 axis_buffer = Some((x, y));
                                 axis_state = match axis_state {
@@ -138,7 +155,7 @@ pub fn implement_pointer(
                                 }
                             }
                         }
-                }
+                    },
                     PtrEvent::Frame => {
                         let axis_buffer = axis_buffer.take();
                         let axis_discrete_buffer = axis_discrete_buffer.take();
@@ -146,7 +163,9 @@ pub fn implement_pointer(
                             if let Some((x, y)) = axis_discrete_buffer {
                                 sink.send_event(
                                     WindowEvent::MouseWheel {
-                                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                        device_id: crate::event::DeviceId(
+                                            crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                        ),
                                         delta: MouseScrollDelta::LineDelta(x as f32, y as f32),
                                         phase: axis_state,
                                         modifiers: modifiers_tracker.lock().unwrap().clone(),
@@ -156,8 +175,12 @@ pub fn implement_pointer(
                             } else if let Some((x, y)) = axis_buffer {
                                 sink.send_event(
                                     WindowEvent::MouseWheel {
-                                    device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
-                                    delta: MouseScrollDelta::PixelDelta((x as f64, y as f64).into()),
+                                        device_id: crate::event::DeviceId(
+                                            crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                        ),
+                                        delta: MouseScrollDelta::PixelDelta(
+                                            (x as f64, y as f64).into(),
+                                        ),
                                         phase: axis_state,
                                         modifiers: modifiers_tracker.lock().unwrap().clone(),
                                     },
@@ -165,18 +188,18 @@ pub fn implement_pointer(
                                 );
                             }
                         }
-                }
+                    },
                     PtrEvent::AxisSource { .. } => (),
                     PtrEvent::AxisStop { .. } => {
                         axis_state = TouchPhase::Ended;
-                }
+                    },
                     PtrEvent::AxisDiscrete { axis, discrete } => {
                         let (mut x, mut y) = axis_discrete_buffer.unwrap_or((0, 0));
                         match axis {
                             // wayland vertical sign convention is the inverse of winit
                             wl_pointer::Axis::VerticalScroll => y -= discrete,
                             wl_pointer::Axis::HorizontalScroll => x += discrete,
-                        _ => unreachable!()
+                            _ => unreachable!(),
                         }
                         axis_discrete_buffer = Some((x, y));
                         axis_state = match axis_state {
@@ -184,8 +207,11 @@ pub fn implement_pointer(
                             _ => TouchPhase::Started,
                         }
                     },
-                _ => unreachable!()
+                    _ => unreachable!(),
                 }
-        }, ())
-    }).unwrap()
+            },
+            (),
+        )
+    })
+    .unwrap()
 }

src/platform_impl/linux/wayland/touch.rs

@@ -2,12 +2,12 @@ use std::sync::{Arc, Mutex};
 
 use crate::event::{TouchPhase, WindowEvent};
 
-use super::{DeviceId, WindowId};
-use super::event_loop::WindowEventsSink;
-use super::window::WindowStore;
+use super::{event_loop::WindowEventsSink, window::WindowStore, DeviceId, WindowId};
 
-use smithay_client_toolkit::reexports::client::protocol::wl_touch::{Event as TouchEvent, WlTouch};
-use smithay_client_toolkit::reexports::client::protocol::wl_seat;
+use smithay_client_toolkit::reexports::client::protocol::{
+    wl_seat,
+    wl_touch::{Event as TouchEvent, WlTouch},
+};
 
 struct TouchPoint {
     wid: WindowId,
@@ -22,7 +22,8 @@ pub(crate) fn implement_touch(
 ) -> WlTouch {
     let mut pending_ids = Vec::new();
     seat.get_touch(|touch| {
-        touch.implement_closure(move |evt, _| {
+        touch.implement_closure(
+            move |evt, _| {
                 let mut sink = sink.lock().unwrap();
                 let store = store.lock().unwrap();
                 match evt {
@@ -33,7 +34,9 @@ pub(crate) fn implement_touch(
                         if let Some(wid) = wid {
                             sink.send_event(
                                 WindowEvent::Touch(crate::event::Touch {
-                                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
                                     phase: TouchPhase::Started,
                                     location: (x, y).into(),
                                     id: id as u64,
@@ -41,19 +44,21 @@ pub(crate) fn implement_touch(
                                 wid,
                             );
                             pending_ids.push(TouchPoint {
-                            wid: wid,
+                                wid,
                                 location: (x, y),
-                            id: 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);
                             sink.send_event(
                                 WindowEvent::Touch(crate::event::Touch {
-                                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
                                     phase: TouchPhase::Ended,
                                     location: pt.location.into(),
                                     id: id as u64,
@@ -61,14 +66,16 @@ pub(crate) fn implement_touch(
                                 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(crate::event::Touch {
-                                device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
                                     phase: TouchPhase::Moved,
                                     location: (x, y).into(),
                                     id: id as u64,
@@ -76,21 +83,28 @@ pub(crate) fn implement_touch(
                                 pt.wid,
                             );
                         }
-                }
+                    },
                     TouchEvent::Frame => (),
-                TouchEvent::Cancel => for pt in pending_ids.drain(..) {
+                    TouchEvent::Cancel => {
+                        for pt in pending_ids.drain(..) {
                             sink.send_event(
                                 WindowEvent::Touch(crate::event::Touch {
-                            device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(DeviceId)),
+                                    device_id: crate::event::DeviceId(
+                                        crate::platform_impl::DeviceId::Wayland(DeviceId),
+                                    ),
                                     phase: TouchPhase::Cancelled,
                                     location: pt.location.into(),
                                     id: pt.id as u64,
                                 }),
                                 pt.wid,
                             );
-                },
-                _ => unreachable!()
                         }
-        }, ())
-    }).unwrap()
+                    },
+                    _ => unreachable!(),
+                }
+            },
+            (),
+        )
+    })
+    .unwrap()
 }

src/platform_impl/linux/wayland/window.rs

@@ -1,18 +1,29 @@
-use std::collections::VecDeque;
-use std::io::{Seek, SeekFrom, Write};
-use std::sync::{Arc, Mutex, Weak};
+use std::{
+    collections::VecDeque,
+    io::{Seek, SeekFrom, Write},
+    sync::{Arc, Mutex, Weak},
+};
 
-use crate::dpi::{LogicalPosition, LogicalSize};
-use crate::error::{ExternalError, NotSupportedError, OsError as RootOsError};
-use crate::platform_impl::{MonitorHandle as PlatformMonitorHandle, PlatformSpecificWindowBuilderAttributes as PlAttributes};
-use crate::monitor::MonitorHandle as RootMonitorHandle;
-use crate::window::{WindowAttributes, CursorIcon};
+use crate::{
+    dpi::{LogicalPosition, LogicalSize},
+    error::{ExternalError, NotSupportedError, OsError as RootOsError},
+    monitor::MonitorHandle as RootMonitorHandle,
+    platform_impl::{
+        MonitorHandle as PlatformMonitorHandle,
+        PlatformSpecificWindowBuilderAttributes as PlAttributes,
+    },
+    window::{CursorIcon, WindowAttributes},
+};
 
-use smithay_client_toolkit::surface::{get_dpi_factor, get_outputs};
-use smithay_client_toolkit::window::{ConceptFrame, Event as WEvent, State as WState, Window as SWindow, Theme};
-use smithay_client_toolkit::reexports::client::{Display, NewProxy};
-use smithay_client_toolkit::reexports::client::protocol::{wl_seat, wl_surface, wl_subsurface, wl_shm};
-use smithay_client_toolkit::output::OutputMgr;
+use smithay_client_toolkit::{
+    output::OutputMgr,
+    reexports::client::{
+        protocol::{wl_seat, wl_shm, wl_subsurface, wl_surface},
+        Display, NewProxy,
+    },
+    surface::{get_dpi_factor, get_outputs},
+    window::{ConceptFrame, Event as WEvent, State as WState, Theme, Window as SWindow},
+};
 
 use super::{make_wid, EventLoopWindowTarget, MonitorHandle, WindowId};
 use crate::platform_impl::platform::wayland::event_loop::{available_monitors, primary_monitor};
@@ -32,7 +43,11 @@ pub struct Window {
 }
 
 impl Window {
-    pub fn new<T>(evlp: &EventLoopWindowTarget<T>, attributes: WindowAttributes, pl_attribs: PlAttributes) -> Result<Window, RootOsError> {
+    pub fn new<T>(
+        evlp: &EventLoopWindowTarget<T>,
+        attributes: WindowAttributes,
+        pl_attribs: PlAttributes,
+    ) -> Result<Window, RootOsError> {
         let (width, height) = attributes.inner_size.map(Into::into).unwrap_or((800, 600));
         // Create the window
         let size = Arc::new(Mutex::new((width, height)));
@@ -71,7 +86,8 @@ impl Window {
             &evlp.env,
             bg_surface.clone(),
             (width, height),
-            move |event| match event {
+            move |event| {
+                match event {
                     WEvent::Configure { new_size, states } => {
                         let mut store = window_store.lock().unwrap();
                         let is_fullscreen = states.contains(&WState::Fullscreen);
@@ -91,7 +107,7 @@ impl Window {
                                 return;
                             }
                         }
-                }
+                    },
                     WEvent::Refresh => {
                         let store = window_store.lock().unwrap();
                         for window in &store.windows {
@@ -100,7 +116,7 @@ impl Window {
                                 return;
                             }
                         }
-                }
+                    },
                     WEvent::Close => {
                         let mut store = window_store.lock().unwrap();
                         for window in &mut store.windows {
@@ -109,9 +125,11 @@ impl Window {
                                 return;
                             }
                         }
+                    },
                 }
             },
-        ).unwrap();
+        )
+        .unwrap();
 
         if let Some(app_id) = pl_attribs.app_id {
             frame.set_app_id(app_id);
@@ -166,11 +184,11 @@ impl Window {
         Ok(Window {
             display: evlp.display.clone(),
             _bg_surface: bg_surface,
-            user_surface: user_surface,
+            user_surface,
             _user_subsurface: user_subsurface,
-            frame: frame,
+            frame,
             outputs: evlp.env.outputs.clone(),
-            size: size,
+            size,
             kill_switch: (kill_switch, evlp.cleanup_needed.clone()),
             need_frame_refresh,
             need_refresh,
@@ -231,12 +249,18 @@ impl Window {
 
     #[inline]
     pub fn set_min_inner_size(&self, dimensions: Option<LogicalSize>) {
-        self.frame.lock().unwrap().set_min_size(dimensions.map(Into::into));
+        self.frame
+            .lock()
+            .unwrap()
+            .set_min_size(dimensions.map(Into::into));
     }
 
     #[inline]
     pub fn set_max_inner_size(&self, dimensions: Option<LogicalSize>) {
-        self.frame.lock().unwrap().set_max_size(dimensions.map(Into::into));
+        self.frame
+            .lock()
+            .unwrap()
+            .set_max_size(dimensions.map(Into::into));
     }
 
     #[inline]
@@ -412,7 +436,16 @@ 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<ConceptFrame>>),
+        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();
@@ -435,4 +468,3 @@ impl WindowStore {
         }
     }
 }
-

src/platform_impl/linux/x11/dnd.rs

@@ -1,8 +1,10 @@
-use std::io;
-use std::sync::Arc;
-use std::path::{Path, PathBuf};
-use std::str::Utf8Error;
-use std::os::raw::*;
+use std::{
+    io,
+    os::raw::*,
+    path::{Path, PathBuf},
+    str::Utf8Error,
+    sync::Arc,
+};
 
 use percent_encoding::percent_decode;
 
@@ -127,13 +129,15 @@ impl Dnd {
             DndState::Accepted => (1, self.atoms.action_private as c_long),
             DndState::Rejected => (0, self.atoms.none as c_long),
         };
-        self.xconn.send_client_msg(
+        self.xconn
+            .send_client_msg(
                 target_window,
                 target_window,
                 self.atoms.status,
                 None,
                 [this_window as c_long, accepted, 0, 0, action],
-        ).flush()
+            )
+            .flush()
     }
 
     pub unsafe fn send_finished(
@@ -146,24 +150,23 @@ impl Dnd {
             DndState::Accepted => (1, self.atoms.action_private as c_long),
             DndState::Rejected => (0, self.atoms.none as c_long),
         };
-        self.xconn.send_client_msg(
+        self.xconn
+            .send_client_msg(
                 target_window,
                 target_window,
                 self.atoms.finished,
                 None,
                 [this_window as c_long, accepted, action, 0, 0],
-        ).flush()
+            )
+            .flush()
     }
 
     pub unsafe fn get_type_list(
         &self,
         source_window: c_ulong,
     ) -> Result<Vec<ffi::Atom>, util::GetPropertyError> {
-        self.xconn.get_property(
-            source_window,
-            self.atoms.type_list,
-            ffi::XA_ATOM,
-        )
+        self.xconn
+            .get_property(source_window, self.atoms.type_list, ffi::XA_ATOM)
     }
 
     pub unsafe fn convert_selection(&self, window: c_ulong, time: c_ulong) {
@@ -181,11 +184,8 @@ impl Dnd {
         &self,
         window: c_ulong,
     ) -> Result<Vec<c_uchar>, util::GetPropertyError> {
-        self.xconn.get_property(
-            window,
-            self.atoms.selection,
-            self.atoms.uri_list,
-        )
+        self.xconn
+            .get_property(window, self.atoms.selection, self.atoms.uri_list)
     }
 
     pub fn parse_data(&self, data: &mut Vec<c_uchar>) -> Result<Vec<PathBuf>, DndDataParseError> {

src/platform_impl/linux/x11/event_processor.rs

@@ -1,20 +1,18 @@
-use std::cell::RefCell;
-use std::collections::HashMap;
-use std::ptr;
-use std::rc::Rc;
-use std::slice;
+use std::{cell::RefCell, collections::HashMap, ptr, rc::Rc, slice};
 
-use libc::{c_int, c_uint, c_ulong, c_char, c_long};
+use libc::{c_char, c_int, c_long, c_uint, c_ulong};
 
 use super::{
-    mkdid, mkwid, get_xtarget, DeviceId, WindowId, Device, ImeReceiver, XExtension,
-    monitor, ffi, UnownedWindow, ScrollOrientation, GenericEventCookie,
-    events, util, DndState, Dnd, DeviceInfo
+    events, ffi, get_xtarget, mkdid, mkwid, monitor, util, Device, DeviceId, DeviceInfo, Dnd,
+    DndState, GenericEventCookie, ImeReceiver, ScrollOrientation, UnownedWindow, WindowId,
+    XExtension,
 };
 
-use crate::event_loop::EventLoopWindowTarget as RootELW;
-use crate::event::{DeviceEvent, Event, KeyboardInput, ModifiersState, WindowEvent};
-use crate::dpi::{LogicalPosition,LogicalSize};
+use crate::{
+    dpi::{LogicalPosition, LogicalSize},
+    event::{DeviceEvent, Event, KeyboardInput, ModifiersState, WindowEvent},
+    event_loop::EventLoopWindowTarget as RootELW,
+};
 
 pub(super) struct EventProcessor<T: 'static> {
     pub(super) dnd: Dnd,
@@ -22,7 +20,7 @@ pub(super) struct EventProcessor<T: 'static> {
     pub(super) randr_event_offset: c_int,
     pub(super) devices: RefCell<HashMap<DeviceId, Device>>,
     pub(super) xi2ext: XExtension,
-    pub(super) target: Rc<RootELW<T>>
+    pub(super) target: Rc<RootELW<T>>,
 }
 
 impl<T: 'static> EventProcessor<T> {
@@ -37,12 +35,14 @@ impl<T: 'static> EventProcessor<T> {
     }
 
     fn with_window<F, Ret>(&self, window_id: ffi::Window, callback: F) -> Option<Ret>
-        where F: Fn(&UnownedWindow) -> Ret
+    where
+        F: Fn(&UnownedWindow) -> Ret,
     {
         let mut deleted = false;
         let window_id = WindowId(window_id);
         let wt = get_xtarget(&self.target);
-        let result = wt.windows
+        let result = wt
+            .windows
             .borrow()
             .get(&window_id)
             .and_then(|window| {
@@ -62,7 +62,7 @@ impl<T: 'static> EventProcessor<T> {
         self.with_window(window_id, |_| ()).is_some()
     }
 
-    pub(super) unsafe fn poll_one_event(&mut self, event_ptr : *mut ffi::XEvent) -> bool {
+    pub(super) unsafe fn poll_one_event(&mut self, event_ptr: *mut ffi::XEvent) -> bool {
         let wt = get_xtarget(&self.target);
         // This function is used to poll and remove a single event
         // from the Xlib event queue in a non-blocking, atomic way.
@@ -73,7 +73,8 @@ impl<T: 'static> EventProcessor<T> {
         unsafe extern "C" fn predicate(
             _display: *mut ffi::Display,
             _event: *mut ffi::XEvent,
-            _arg : *mut c_char)  -> c_int {
+            _arg: *mut c_char,
+        ) -> c_int {
             // This predicate always returns "true" (1) to accept all events
             1
         }
@@ -82,32 +83,42 @@ impl<T: 'static> EventProcessor<T> {
             wt.xconn.display,
             event_ptr,
             Some(predicate),
-            std::ptr::null_mut());
+            std::ptr::null_mut(),
+        );
 
         result != 0
     }
 
     pub(super) fn process_event<F>(&mut self, xev: &mut ffi::XEvent, mut callback: F)
-        where F: FnMut(Event<T>)
+    where
+        F: FnMut(Event<T>),
     {
         let wt = get_xtarget(&self.target);
         // XFilterEvent tells us when an event has been discarded by the input method.
         // Specifically, this involves all of the KeyPress events in compose/pre-edit sequences,
         // along with an extra copy of the KeyRelease events. This also prevents backspace and
         // arrow keys from being detected twice.
-        if ffi::True == unsafe { (wt.xconn.xlib.XFilterEvent)(
-            xev,
-            { let xev: &ffi::XAnyEvent = xev.as_ref(); xev.window }
-        ) } {
+        if ffi::True
+            == unsafe {
+                (wt.xconn.xlib.XFilterEvent)(xev, {
+                    let xev: &ffi::XAnyEvent = xev.as_ref();
+                    xev.window
+                })
+            }
+        {
             return;
         }
 
         let event_type = xev.get_type();
         match event_type {
             ffi::MappingNotify => {
-                unsafe { (wt.xconn.xlib.XRefreshKeyboardMapping)(xev.as_mut()); }
-                wt.xconn.check_errors().expect("Failed to call XRefreshKeyboardMapping");
+                unsafe {
+                    (wt.xconn.xlib.XRefreshKeyboardMapping)(xev.as_mut());
                 }
+                wt.xconn
+                    .check_errors()
+                    .expect("Failed to call XRefreshKeyboardMapping");
+            },
 
             ffi::ClientMessage => {
                 let client_msg: &ffi::XClientMessageEvent = xev.as_ref();
@@ -116,7 +127,10 @@ impl<T: 'static> EventProcessor<T> {
                 let window_id = mkwid(window);
 
                 if client_msg.data.get_long(0) as ffi::Atom == wt.wm_delete_window {
-                    callback(Event::WindowEvent { window_id, event: WindowEvent::CloseRequested });
+                    callback(Event::WindowEvent {
+                        window_id,
+                        event: WindowEvent::CloseRequested,
+                    });
                 } else if client_msg.message_type == self.dnd.atoms.enter {
                     let source_window = client_msg.data.get_long(0) as c_ulong;
                     let flags = client_msg.data.get_long(1);
@@ -127,10 +141,11 @@ impl<T: 'static> EventProcessor<T> {
                         let type_list = vec![
                             client_msg.data.get_long(2) as c_ulong,
                             client_msg.data.get_long(3) as c_ulong,
-                            client_msg.data.get_long(4) as c_ulong
+                            client_msg.data.get_long(4) as c_ulong,
                         ];
                         self.dnd.type_list = Some(type_list);
-                    } else if let Ok(more_types) = unsafe { self.dnd.get_type_list(source_window) } {
+                    } else if let Ok(more_types) = unsafe { self.dnd.get_type_list(source_window) }
+                    {
                         self.dnd.type_list = Some(more_types);
                     }
                 } else if client_msg.message_type == self.dnd.atoms.position {
@@ -178,18 +193,21 @@ impl<T: 'static> EventProcessor<T> {
                                 // This results in the `SelectionNotify` event below
                                 self.dnd.convert_selection(window, time);
                             }
-                            self.dnd.send_status(window, source_window, DndState::Accepted)
+                            self.dnd
+                                .send_status(window, source_window, DndState::Accepted)
                                 .expect("Failed to send `XdndStatus` message.");
                         }
                     } else {
                         unsafe {
-                            self.dnd.send_status(window, source_window, DndState::Rejected)
+                            self.dnd
+                                .send_status(window, source_window, DndState::Rejected)
                                 .expect("Failed to send `XdndStatus` message.");
                         }
                         self.dnd.reset();
                     }
                 } else if client_msg.message_type == self.dnd.atoms.drop {
-                    let (source_window, state) = 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 {
@@ -206,7 +224,8 @@ impl<T: 'static> EventProcessor<T> {
                         (source_window, DndState::Rejected)
                     };
                     unsafe {
-                        self.dnd.send_finished(window, source_window, state)
+                        self.dnd
+                            .send_finished(window, source_window, state)
                             .expect("Failed to send `XdndFinished` message.");
                     }
                     self.dnd.reset();
@@ -217,7 +236,7 @@ impl<T: 'static> EventProcessor<T> {
                         event: WindowEvent::HoveredFileCancelled,
                     });
                 }
-            }
+            },
 
             ffi::SelectionNotify => {
                 let xsel: &ffi::XSelectionEvent = xev.as_ref();
@@ -244,7 +263,7 @@ impl<T: 'static> EventProcessor<T> {
 
                     self.dnd.result = result;
                 }
-            }
+            },
 
             ffi::ConfigureNotify => {
                 #[derive(Debug, Default)]
@@ -274,15 +293,22 @@ impl<T: 'static> EventProcessor<T> {
                     let mut shared_state_lock = window.shared_state.lock();
 
                     let (mut resized, moved) = {
-                        let resized = util::maybe_change(&mut shared_state_lock.size, new_inner_size);
+                        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)
+                            util::maybe_change(
+                                &mut shared_state_lock.inner_position,
+                                new_inner_position,
+                            )
                         } else {
                             // Detect when frame extents change.
                             // Since this isn't synthetic, as per the notes above, this position is relative to the
                             // parent window.
                             let rel_parent = new_inner_position;
-                            if util::maybe_change(&mut shared_state_lock.inner_position_rel_parent, rel_parent) {
+                            if util::maybe_change(
+                                &mut shared_state_lock.inner_position_rel_parent,
+                                rel_parent,
+                            ) {
                                 // This ensures we process the next `Moved`.
                                 shared_state_lock.inner_position = None;
                                 // Extra insurance against stale frame extents.
@@ -297,18 +323,22 @@ impl<T: 'static> EventProcessor<T> {
 
                     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
+                        let frame_extents = shared_state_lock
+                            .frame_extents
                             .as_ref()
                             .cloned()
                             .unwrap_or_else(|| {
-                                let frame_extents = wt.xconn.get_frame_extents_heuristic(xwindow, wt.root);
+                                let frame_extents =
+                                    wt.xconn.get_frame_extents_heuristic(xwindow, wt.root);
                                 shared_state_lock.frame_extents = Some(frame_extents.clone());
                                 frame_extents
                             });
-                        let outer = frame_extents.inner_pos_to_outer(new_inner_position.0, new_inner_position.1);
+                        let outer = frame_extents
+                            .inner_pos_to_outer(new_inner_position.0, new_inner_position.1);
                         shared_state_lock.position = Some(outer);
                         if moved {
-                            let logical_position = LogicalPosition::from_physical(outer, monitor.hidpi_factor);
+                            let logical_position =
+                                LogicalPosition::from_physical(outer, monitor.hidpi_factor);
                             events.moved = Some(WindowEvent::Moved(logical_position));
                         }
                         outer
@@ -319,12 +349,13 @@ impl<T: 'static> EventProcessor<T> {
                     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
+                        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
+                        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)
@@ -337,7 +368,8 @@ impl<T: 'static> EventProcessor<T> {
                             new_hidpi_factor
                         };
                         if last_hidpi_factor != new_hidpi_factor {
-                            events.dpi_changed = Some(WindowEvent::HiDpiFactorChanged(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,
@@ -357,7 +389,10 @@ impl<T: 'static> EventProcessor<T> {
                     // 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);
+                        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;
@@ -374,7 +409,8 @@ impl<T: 'static> EventProcessor<T> {
                     }
 
                     if resized {
-                        let logical_size = LogicalSize::from_physical(new_inner_size, monitor.hidpi_factor);
+                        let logical_size =
+                            LogicalSize::from_physical(new_inner_size, monitor.hidpi_factor);
                         events.resized = Some(WindowEvent::Resized(logical_size));
                     }
 
@@ -393,7 +429,7 @@ impl<T: 'static> EventProcessor<T> {
                         callback(Event::WindowEvent { window_id, event });
                     }
                 }
-            }
+            },
 
             ffi::ReparentNotify => {
                 let xev: &ffi::XReparentEvent = xev.as_ref();
@@ -408,7 +444,7 @@ impl<T: 'static> EventProcessor<T> {
                 self.with_window(xev.window, |window| {
                     window.invalidate_cached_frame_extents();
                 });
-            }
+            },
 
             ffi::DestroyNotify => {
                 let xev: &ffi::XDestroyWindowEvent = xev.as_ref();
@@ -427,8 +463,11 @@ impl<T: 'static> EventProcessor<T> {
                     .remove_context(window)
                     .expect("Failed to destroy input context");
 
-                callback(Event::WindowEvent { window_id, event: WindowEvent::Destroyed });
-            }
+                callback(Event::WindowEvent {
+                    window_id,
+                    event: WindowEvent::Destroyed,
+                });
+            },
 
             ffi::Expose => {
                 let xev: &ffi::XExposeEvent = xev.as_ref();
@@ -436,8 +475,11 @@ impl<T: 'static> EventProcessor<T> {
                 let window = xev.window;
                 let window_id = mkwid(window);
 
-                callback(Event::WindowEvent { window_id, event: WindowEvent::RedrawRequested });
-            }
+                callback(Event::WindowEvent {
+                    window_id,
+                    event: WindowEvent::RedrawRequested,
+                });
+            },
 
             ffi::KeyPress | ffi::KeyRelease => {
                 use crate::event::ElementState::{Pressed, Released};
@@ -493,7 +535,7 @@ impl<T: 'static> EventProcessor<T> {
                                 virtual_keycode,
                                 modifiers,
                             },
-                        }
+                        },
                     });
                 }
 
@@ -512,20 +554,29 @@ impl<T: 'static> EventProcessor<T> {
                         callback(event);
                     }
                 }
-            }
+            },
 
             ffi::GenericEvent => {
-                let guard = if let Some(e) = GenericEventCookie::from_event(&wt.xconn, *xev) { e } else { return };
+                let guard = if let Some(e) = GenericEventCookie::from_event(&wt.xconn, *xev) {
+                    e
+                } else {
+                    return;
+                };
                 let xev = &guard.cookie;
                 if self.xi2ext.opcode != xev.extension {
                     return;
                 }
 
-                use crate::event::WindowEvent::{Focused, CursorEntered, MouseInput, CursorLeft, CursorMoved, MouseWheel, AxisMotion};
-                use crate::event::ElementState::{Pressed, Released};
-                use crate::event::MouseButton::{Left, Right, Middle, Other};
-                use crate::event::MouseScrollDelta::LineDelta;
-                use crate::event::{Touch, TouchPhase};
+                use crate::event::{
+                    ElementState::{Pressed, Released},
+                    MouseButton::{Left, Middle, Other, Right},
+                    MouseScrollDelta::LineDelta,
+                    Touch, TouchPhase,
+                    WindowEvent::{
+                        AxisMotion, CursorEntered, CursorLeft, CursorMoved, Focused, MouseInput,
+                        MouseWheel,
+                    },
+                };
 
                 match xev.evtype {
                     ffi::XI_ButtonPress | ffi::XI_ButtonRelease => {
@@ -545,7 +596,8 @@ impl<T: 'static> EventProcessor<T> {
                             Released
                         };
                         match xev.detail as u32 {
-                            ffi::Button1 => callback(Event::WindowEvent {
+                            ffi::Button1 => {
+                                callback(Event::WindowEvent {
                                     window_id,
                                     event: MouseInput {
                                         device_id,
@@ -553,8 +605,10 @@ impl<T: 'static> EventProcessor<T> {
                                         button: Left,
                                         modifiers,
                                     },
-                            }),
-                            ffi::Button2 => callback(Event::WindowEvent {
+                                })
+                            },
+                            ffi::Button2 => {
+                                callback(Event::WindowEvent {
                                     window_id,
                                     event: MouseInput {
                                         device_id,
@@ -562,8 +616,10 @@ impl<T: 'static> EventProcessor<T> {
                                         button: Middle,
                                         modifiers,
                                     },
-                            }),
-                            ffi::Button3 => callback(Event::WindowEvent {
+                                })
+                            },
+                            ffi::Button3 => {
+                                callback(Event::WindowEvent {
                                     window_id,
                                     event: MouseInput {
                                         device_id,
@@ -571,12 +627,14 @@ impl<T: 'static> EventProcessor<T> {
                                         button: Right,
                                         modifiers,
                                     },
-                            }),
+                                })
+                            },
 
                             // Suppress emulated scroll wheel clicks, since we handle the real motion events for those.
                             // In practice, even clicky scroll wheels appear to be reported by evdev (and XInput2 in
                             // turn) as axis motion, so we don't otherwise special-case these button presses.
-                            4 | 5 | 6 | 7 => if xev.flags & ffi::XIPointerEmulated == 0 {
+                            4 | 5 | 6 | 7 => {
+                                if xev.flags & ffi::XIPointerEmulated == 0 {
                                     callback(Event::WindowEvent {
                                         window_id,
                                         event: MouseWheel {
@@ -592,9 +650,11 @@ impl<T: 'static> EventProcessor<T> {
                                             modifiers,
                                         },
                                     });
+                                }
                             },
 
-                            x => callback(Event::WindowEvent {
+                            x => {
+                                callback(Event::WindowEvent {
                                     window_id,
                                     event: MouseInput {
                                         device_id,
@@ -602,9 +662,10 @@ impl<T: 'static> EventProcessor<T> {
                                         button: Other(x as u8),
                                         modifiers,
                                     },
-                            }),
-                        }
+                                })
+                            },
                         }
+                    },
                     ffi::XI_Motion => {
                         let xev: &ffi::XIDeviceEvent = unsafe { &*(xev.data as *const _) };
                         let device_id = mkdid(xev.deviceid);
@@ -618,9 +679,8 @@ impl<T: 'static> EventProcessor<T> {
                             util::maybe_change(&mut shared_state_lock.cursor_pos, new_cursor_pos)
                         });
                         if cursor_moved == Some(true) {
-                            let dpi_factor = self.with_window(xev.event, |window| {
-                                window.hidpi_factor()
-                            });
+                            let dpi_factor =
+                                self.with_window(xev.event, |window| window.hidpi_factor());
                             if let Some(dpi_factor) = dpi_factor {
                                 let position = LogicalPosition::from_physical(
                                     (xev.event_x as f64, xev.event_y as f64),
@@ -644,7 +704,12 @@ impl<T: 'static> EventProcessor<T> {
                         // More gymnastics, for self.devices
                         let mut events = Vec::new();
                         {
-                            let mask = unsafe { slice::from_raw_parts(xev.valuators.mask, xev.valuators.mask_len as usize) };
+                            let mask = unsafe {
+                                slice::from_raw_parts(
+                                    xev.valuators.mask,
+                                    xev.valuators.mask_len as usize,
+                                )
+                            };
                             let mut devices = self.devices.borrow_mut();
                             let physical_device = match devices.get_mut(&DeviceId(xev.sourceid)) {
                                 Some(device) => device,
@@ -652,10 +717,14 @@ impl<T: 'static> EventProcessor<T> {
                             };
 
                             let mut value = xev.valuators.values;
-                            for i in 0..xev.valuators.mask_len*8 {
+                            for i in 0..xev.valuators.mask_len * 8 {
                                 if ffi::XIMaskIsSet(mask, i) {
                                     let x = unsafe { *value };
-                                    if let Some(&mut (_, ref mut info)) = physical_device.scroll_axes.iter_mut().find(|&&mut (axis, _)| axis == i) {
+                                    if let Some(&mut (_, ref mut info)) = physical_device
+                                        .scroll_axes
+                                        .iter_mut()
+                                        .find(|&&mut (axis, _)| axis == i)
+                                    {
                                         let delta = (x - info.position) / info.increment;
                                         info.position = x;
                                         events.push(Event::WindowEvent {
@@ -663,9 +732,13 @@ impl<T: 'static> EventProcessor<T> {
                                             event: MouseWheel {
                                                 device_id,
                                                 delta: match info.orientation {
-                                                    ScrollOrientation::Horizontal => LineDelta(delta as f32, 0.0),
+                                                    ScrollOrientation::Horizontal => {
+                                                        LineDelta(delta as f32, 0.0)
+                                                    },
                                                     // X11 vertical scroll coordinates are opposite to winit's
-                                                    ScrollOrientation::Vertical => LineDelta(0.0, -delta as f32),
+                                                    ScrollOrientation::Vertical => {
+                                                        LineDelta(0.0, -delta as f32)
+                                                    },
                                                 },
                                                 phase: TouchPhase::Moved,
                                                 modifiers,
@@ -688,7 +761,7 @@ impl<T: 'static> EventProcessor<T> {
                         for event in events {
                             callback(event);
                         }
-                    }
+                    },
 
                     ffi::XI_Enter => {
                         let xev: &ffi::XIEnterEvent = unsafe { &*(xev.data as *const _) };
@@ -704,7 +777,8 @@ impl<T: 'static> EventProcessor<T> {
                                 // presumably some other WMs. On those, `XI_Enter` doesn't include
                                 // the physical device ID, so both `sourceid` and `deviceid` are
                                 // the virtual device.
-                                || device_info.attachment == xev.sourceid {
+                                || device_info.attachment == xev.sourceid
+                                {
                                     let device_id = DeviceId(device_info.deviceid);
                                     if let Some(device) = devices.get_mut(&device_id) {
                                         device.reset_scroll_position(device_info);
@@ -717,9 +791,9 @@ impl<T: 'static> EventProcessor<T> {
                             event: CursorEntered { device_id },
                         });
 
-                        if let Some(dpi_factor) = self.with_window(xev.event, |window| {
-                            window.hidpi_factor()
-                        }) {
+                        if let Some(dpi_factor) =
+                            self.with_window(xev.event, |window| window.hidpi_factor())
+                        {
                             let position = LogicalPosition::from_physical(
                                 (xev.event_x as f64, xev.event_y as f64),
                                 dpi_factor,
@@ -732,7 +806,8 @@ impl<T: 'static> EventProcessor<T> {
                             // 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 = wt.xconn
+                            let modifiers = wt
+                                .xconn
                                 .query_pointer(xev.event, xev.deviceid)
                                 .expect("Failed to query pointer device")
                                 .get_modifier_state();
@@ -746,7 +821,7 @@ impl<T: 'static> EventProcessor<T> {
                                 },
                             });
                         }
-                    }
+                    },
                     ffi::XI_Leave => {
                         let xev: &ffi::XILeaveEvent = unsafe { &*(xev.data as *const _) };
 
@@ -756,16 +831,17 @@ impl<T: 'static> EventProcessor<T> {
                         if !window_closed {
                             callback(Event::WindowEvent {
                                 window_id: mkwid(xev.event),
-                                event: CursorLeft { device_id: mkdid(xev.deviceid) },
+                                event: CursorLeft {
+                                    device_id: mkdid(xev.deviceid),
+                                },
                             });
                         }
-                    }
+                    },
                     ffi::XI_FocusIn => {
                         let xev: &ffi::XIFocusInEvent = unsafe { &*(xev.data as *const _) };
 
-                        let dpi_factor = match self.with_window(xev.event, |window| {
-                            window.hidpi_factor()
-                        }) {
+                        let dpi_factor =
+                            match self.with_window(xev.event, |window| window.hidpi_factor()) {
                                 Some(dpi_factor) => dpi_factor,
                                 None => return,
                             };
@@ -776,11 +852,15 @@ impl<T: 'static> EventProcessor<T> {
                             .focus(xev.event)
                             .expect("Failed to focus input context");
 
-                        callback(Event::WindowEvent { window_id, event: Focused(true) });
+                        callback(Event::WindowEvent {
+                            window_id,
+                            event: Focused(true),
+                        });
 
                         // The deviceid for this event is for a keyboard instead of a pointer,
                         // so we have to do a little extra work.
-                        let pointer_id = self.devices
+                        let pointer_id = self
+                            .devices
                             .borrow()
                             .get(&DeviceId(xev.deviceid))
                             .map(|device| device.attachment)
@@ -796,12 +876,14 @@ impl<T: 'static> EventProcessor<T> {
                                 device_id: mkdid(pointer_id),
                                 position,
                                 modifiers: ModifiersState::from(xev.mods),
-                            }
+                            },
                         });
-                    }
+                    },
                     ffi::XI_FocusOut => {
                         let xev: &ffi::XIFocusOutEvent = unsafe { &*(xev.data as *const _) };
-                        if !self.window_exists(xev.event) { return; }
+                        if !self.window_exists(xev.event) {
+                            return;
+                        }
                         wt.ime
                             .borrow_mut()
                             .unfocus(xev.event)
@@ -810,7 +892,7 @@ impl<T: 'static> EventProcessor<T> {
                             window_id: mkwid(xev.event),
                             event: Focused(false),
                         })
-                    }
+                    },
 
                     ffi::XI_TouchBegin | ffi::XI_TouchUpdate | ffi::XI_TouchEnd => {
                         let xev: &ffi::XIDeviceEvent = unsafe { &*(xev.data as *const _) };
@@ -819,11 +901,10 @@ impl<T: 'static> EventProcessor<T> {
                             ffi::XI_TouchBegin => TouchPhase::Started,
                             ffi::XI_TouchUpdate => TouchPhase::Moved,
                             ffi::XI_TouchEnd => TouchPhase::Ended,
-                            _ => unreachable!()
+                            _ => unreachable!(),
                         };
-                         let dpi_factor = self.with_window(xev.event, |window| {
-                            window.hidpi_factor()
-                        });
+                        let dpi_factor =
+                            self.with_window(xev.event, |window| window.hidpi_factor());
                         if let Some(dpi_factor) = dpi_factor {
                             let location = LogicalPosition::from_physical(
                                 (xev.event_x as f64, xev.event_y as f64),
@@ -839,31 +920,39 @@ impl<T: 'static> EventProcessor<T> {
                                 }),
                             })
                         }
-                    }
+                    },
 
                     ffi::XI_RawButtonPress | ffi::XI_RawButtonRelease => {
                         let xev: &ffi::XIRawEvent = unsafe { &*(xev.data as *const _) };
                         if xev.flags & ffi::XIPointerEmulated == 0 {
-                            callback(Event::DeviceEvent { device_id: mkdid(xev.deviceid), event: DeviceEvent::Button {
+                            callback(Event::DeviceEvent {
+                                device_id: mkdid(xev.deviceid),
+                                event: DeviceEvent::Button {
                                     button: xev.detail as u32,
                                     state: match xev.evtype {
                                         ffi::XI_RawButtonPress => Pressed,
                                         ffi::XI_RawButtonRelease => Released,
                                         _ => unreachable!(),
                                     },
-                            }});
-                        }
+                                },
+                            });
                         }
+                    },
 
                     ffi::XI_RawMotion => {
                         let xev: &ffi::XIRawEvent = unsafe { &*(xev.data as *const _) };
                         let did = mkdid(xev.deviceid);
 
-                        let mask = unsafe { slice::from_raw_parts(xev.valuators.mask, xev.valuators.mask_len as usize) };
+                        let mask = unsafe {
+                            slice::from_raw_parts(
+                                xev.valuators.mask,
+                                xev.valuators.mask_len as usize,
+                            )
+                        };
                         let mut value = xev.raw_values;
                         let mut mouse_delta = (0.0, 0.0);
                         let mut scroll_delta = (0.0, 0.0);
-                        for i in 0..xev.valuators.mask_len*8 {
+                        for i in 0..xev.valuators.mask_len * 8 {
                             if ffi::XIMaskIsSet(mask, i) {
                                 let x = unsafe { *value };
                                 // We assume that every XInput2 device with analog axes is a pointing device emitting
@@ -875,24 +964,31 @@ impl<T: 'static> EventProcessor<T> {
                                     3 => scroll_delta.1 = x as f32,
                                     _ => {},
                                 }
-                                callback(Event::DeviceEvent { device_id: did, event: DeviceEvent::Motion {
+                                callback(Event::DeviceEvent {
+                                    device_id: did,
+                                    event: DeviceEvent::Motion {
                                         axis: i as u32,
                                         value: x,
-                                }});
+                                    },
+                                });
                                 value = unsafe { value.offset(1) };
                             }
                         }
                         if mouse_delta != (0.0, 0.0) {
-                            callback(Event::DeviceEvent { device_id: did, event: DeviceEvent::MouseMotion {
-                                delta: mouse_delta,
-                            }});
+                            callback(Event::DeviceEvent {
+                                device_id: did,
+                                event: DeviceEvent::MouseMotion { delta: mouse_delta },
+                            });
                         }
                         if scroll_delta != (0.0, 0.0) {
-                            callback(Event::DeviceEvent { device_id: did, event: DeviceEvent::MouseWheel {
+                            callback(Event::DeviceEvent {
+                                device_id: did,
+                                event: DeviceEvent::MouseWheel {
                                     delta: LineDelta(scroll_delta.0, scroll_delta.1),
-                            }});
-                        }
+                                },
+                            });
                         }
+                    },
 
                     ffi::XI_RawKeyPress | ffi::XI_RawKeyRelease => {
                         let xev: &ffi::XIRawEvent = unsafe { &*(xev.data as *const _) };
@@ -905,7 +1001,9 @@ impl<T: 'static> EventProcessor<T> {
 
                         let device_id = xev.sourceid;
                         let keycode = xev.detail;
-                        if keycode < 8 { return; }
+                        if keycode < 8 {
+                            return;
+                        }
                         let scancode = (keycode - 8) as u32;
 
                         let keysym = unsafe {
@@ -915,7 +1013,9 @@ impl<T: 'static> EventProcessor<T> {
                                 0,
                             )
                         };
-                        wt.xconn.check_errors().expect("Failed to lookup raw keysym");
+                        wt.xconn
+                            .check_errors()
+                            .expect("Failed to lookup raw keysym");
 
                         let virtual_keycode = events::keysym_to_element(keysym as c_uint);
 
@@ -933,23 +1033,32 @@ impl<T: 'static> EventProcessor<T> {
                                 modifiers: ModifiersState::default(),
                             }),
                         });
-                    }
+                    },
 
                     ffi::XI_HierarchyChanged => {
                         let xev: &ffi::XIHierarchyEvent = unsafe { &*(xev.data as *const _) };
-                        for info in unsafe { slice::from_raw_parts(xev.info, xev.num_info as usize) } {
+                        for info in
+                            unsafe { slice::from_raw_parts(xev.info, xev.num_info as usize) }
+                        {
                             if 0 != info.flags & (ffi::XISlaveAdded | ffi::XIMasterAdded) {
                                 self.init_device(info.deviceid);
-                                callback(Event::DeviceEvent { device_id: mkdid(info.deviceid), event: DeviceEvent::Added });
-                            } else if 0 != info.flags & (ffi::XISlaveRemoved | ffi::XIMasterRemoved) {
-                                callback(Event::DeviceEvent { device_id: mkdid(info.deviceid), event: DeviceEvent::Removed });
+                                callback(Event::DeviceEvent {
+                                    device_id: mkdid(info.deviceid),
+                                    event: DeviceEvent::Added,
+                                });
+                            } else if 0 != info.flags & (ffi::XISlaveRemoved | ffi::XIMasterRemoved)
+                            {
+                                callback(Event::DeviceEvent {
+                                    device_id: mkdid(info.deviceid),
+                                    event: DeviceEvent::Removed,
+                                });
                                 let mut devices = self.devices.borrow_mut();
                                 devices.remove(&DeviceId(info.deviceid));
                             }
                         }
-                    }
+                    },
 
-                    _ => {}
+                    _ => {},
                 }
             },
             _ => {
@@ -972,10 +1081,11 @@ impl<T: 'static> EventProcessor<T> {
                                                     callback(Event::WindowEvent {
                                                         window_id: mkwid(window_id.0),
                                                         event: WindowEvent::HiDpiFactorChanged(
-                                                            new_monitor.hidpi_factor
+                                                            new_monitor.hidpi_factor,
                                                         ),
                                                     });
-                                                    let (width, height) = window.inner_size_physical();
+                                                    let (width, height) =
+                                                        window.inner_size_physical();
                                                     let (_, _, flusher) = window.adjust_for_dpi(
                                                         prev_monitor.hidpi_factor,
                                                         new_monitor.hidpi_factor,

src/platform_impl/linux/x11/events.rs

@@ -1,6 +1,6 @@
-use libc;
 use super::ffi;
 use crate::event::VirtualKeyCode;
+use libc;
 
 pub fn keysym_to_element(keysym: libc::c_uint) -> Option<VirtualKeyCode> {
     Some(match keysym {
@@ -1003,6 +1003,6 @@ pub fn keysym_to_element(keysym: libc::c_uint) -> Option<VirtualKeyCode> {
         ffi::XF86XK_Copy => VirtualKeyCode::Copy,
         ffi::XF86XK_Paste => VirtualKeyCode::Paste,
         ffi::XF86XK_Cut => VirtualKeyCode::Cut,
-        _ => return None
+        _ => return None,
     })
 }

src/platform_impl/linux/x11/ffi.rs

@@ -1,9 +1,4 @@
-pub use x11_dl::keysym::*;
-pub use x11_dl::xcursor::*;
-pub use x11_dl::xlib::*;
-pub use x11_dl::xinput::*;
-pub use x11_dl::xinput2::*;
-pub use x11_dl::xlib_xcb::*;
-pub use x11_dl::error::OpenError;
-pub use x11_dl::xrandr::*;
-pub use x11_dl::xrender::*;
+pub use x11_dl::{
+    error::OpenError, keysym::*, xcursor::*, xinput::*, xinput2::*, xlib::*, xlib_xcb::*,
+    xrandr::*, xrender::*,
+};

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

@@ -1,13 +1,12 @@
-use std::ptr;
-use std::sync::Arc;
-use std::collections::HashMap;
-use std::os::raw::c_char;
+use std::{collections::HashMap, os::raw::c_char, ptr, sync::Arc};
 
 use super::{ffi, XConnection, XError};
 
-use super::inner::{close_im, ImeInner};
-use super::input_method::PotentialInputMethods;
-use super::context::{ImeContextCreationError, ImeContext};
+use super::{
+    context::{ImeContext, ImeContextCreationError},
+    inner::{close_im, ImeInner},
+    input_method::PotentialInputMethods,
+};
 
 pub unsafe fn xim_set_callback(
     xconn: &Arc<XConnection>,
@@ -17,12 +16,7 @@ pub unsafe fn xim_set_callback(
 ) -> Result<(), XError> {
     // It's advisable to wrap variadic FFI functions in our own functions, as we want to minimize
     // access that isn't type-checked.
-    (xconn.xlib.XSetIMValues)(
-        xim,
-        field,
-        callback,
-        ptr::null_mut::<()>(),
-    );
+    (xconn.xlib.XSetIMValues)(xim, field, callback, ptr::null_mut::<()>());
     xconn.check_errors()
 }
 
@@ -107,18 +101,14 @@ unsafe fn replace_im(inner: *mut ImeInner) -> Result<(), ReplaceImError> {
             let _ = close_im(xconn, new_im.im);
         }
         result
-    }.map_err(ReplaceImError::SetDestroyCallbackFailed)?;
+    }
+    .map_err(ReplaceImError::SetDestroyCallbackFailed)?;
 
     let mut new_contexts = HashMap::new();
     for (window, old_context) in (*inner).contexts.iter() {
         let spot = old_context.as_ref().map(|old_context| old_context.ic_spot);
         let new_context = {
-            let result = ImeContext::new(
-                xconn,
-                new_im.im,
-                *window,
-                spot,
-            );
+            let result = ImeContext::new(xconn, new_im.im, *window, spot);
             if result.is_err() {
                 let _ = close_im(xconn, new_im.im);
             }
@@ -137,7 +127,7 @@ unsafe fn replace_im(inner: *mut ImeInner) -> Result<(), ReplaceImError> {
     Ok(())
 }
 
-pub unsafe extern fn xim_instantiate_callback(
+pub unsafe extern "C" fn xim_instantiate_callback(
     _display: *mut ffi::Display,
     client_data: ffi::XPointer,
     // This field is unsupplied.
@@ -160,7 +150,7 @@ pub unsafe extern fn xim_instantiate_callback(
 // This callback is triggered when the input method is closed on the server end. When this
 // happens, XCloseIM/XDestroyIC doesn't need to be called, as the resources have already been
 // free'd (attempting to do so causes our connection to freeze).
-pub unsafe extern fn xim_destroy_callback(
+pub unsafe extern "C" fn xim_destroy_callback(
     _xim: ffi::XIM,
     client_data: ffi::XPointer,
     // This field is unsupplied.

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

@@ -1,6 +1,8 @@
-use std::ptr;
-use std::sync::Arc;
-use std::os::raw::{c_short, c_void};
+use std::{
+    os::raw::{c_short, c_void},
+    ptr,
+    sync::Arc,
+};
 
 use super::{ffi, util, XConnection, XError};
 
@@ -22,7 +24,8 @@ unsafe fn create_pre_edit_attr<'a>(
             ic_spot,
             ptr::null_mut::<()>(),
         ),
-    ).expect("XVaCreateNestedList returned NULL")
+    )
+    .expect("XVaCreateNestedList returned NULL")
 }
 
 // WARNING: this struct doesn't destroy its XIC resource when dropped.
@@ -49,7 +52,9 @@ impl ImeContext {
         };
 
         let ic = ic.ok_or(ImeContextCreationError::Null)?;
-        xconn.check_errors().map_err(ImeContextCreationError::XError)?;
+        xconn
+            .check_errors()
+            .map_err(ImeContextCreationError::XError)?;
 
         Ok(ImeContext {
             ic,

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

@@ -1,12 +1,8 @@
-use std::mem;
-use std::ptr;
-use std::sync::Arc;
-use std::collections::HashMap;
+use std::{collections::HashMap, mem, ptr, sync::Arc};
 
 use super::{ffi, XConnection, XError};
 
-use super::input_method::PotentialInputMethods;
-use super::context::ImeContext;
+use super::{context::ImeContext, input_method::PotentialInputMethods};
 
 pub unsafe fn close_im(xconn: &Arc<XConnection>, im: ffi::XIM) -> Result<(), XError> {
     (xconn.xlib.XCloseIM)(im);
@@ -33,10 +29,7 @@ pub struct ImeInner {
 }
 
 impl ImeInner {
-    pub fn new(
-        xconn: Arc<XConnection>,
-        potential_input_methods: PotentialInputMethods,
-    ) -> Self {
+    pub fn new(xconn: Arc<XConnection>, potential_input_methods: PotentialInputMethods) -> Self {
         ImeInner {
             xconn,
             im: ptr::null_mut(),

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

@@ -1,9 +1,11 @@
-use std::env;
-use std::fmt;
-use std::ptr;
-use std::sync::Arc;
-use std::os::raw::c_char;
-use std::ffi::{CStr, CString, IntoStringError};
+use std::{
+    env,
+    ffi::{CStr, CString, IntoStringError},
+    fmt,
+    os::raw::c_char,
+    ptr,
+    sync::Arc,
+};
 
 use parking_lot::Mutex;
 
@@ -13,10 +15,7 @@ lazy_static! {
     static ref GLOBAL_LOCK: Mutex<()> = Default::default();
 }
 
-unsafe fn open_im(
-    xconn: &Arc<XConnection>,
-    locale_modifiers: &CStr,
-) -> Option<ffi::XIM> {
+unsafe fn open_im(xconn: &Arc<XConnection>, locale_modifiers: &CStr) -> Option<ffi::XIM> {
     let _lock = GLOBAL_LOCK.lock();
 
     // XSetLocaleModifiers returns...
@@ -97,11 +96,9 @@ unsafe fn get_xim_servers(xconn: &Arc<XConnection>) -> Result<Vec<String>, GetXi
 
     let root = (xconn.xlib.XDefaultRootWindow)(xconn.display);
 
-    let mut atoms: Vec<ffi::Atom> = xconn.get_property(
-        root,
-        servers_atom,
-        ffi::XA_ATOM,
-    ).map_err(GetXimServersError::GetPropertyError)?;
+    let mut atoms: Vec<ffi::Atom> = xconn
+        .get_property(root, servers_atom, ffi::XA_ATOM)
+        .map_err(GetXimServersError::GetPropertyError)?;
 
     let mut names: Vec<*const c_char> = Vec::with_capacity(atoms.len());
     (xconn.xlib.XGetAtomNames)(
@@ -135,15 +132,12 @@ impl InputMethodName {
     pub fn from_string(string: String) -> Self {
         let c_string = CString::new(string.clone())
             .expect("String used to construct CString contained null byte");
-        InputMethodName {
-            c_string,
-            string,
-        }
+        InputMethodName { c_string, string }
     }
 
     pub fn from_str(string: &str) -> Self {
-        let c_string = CString::new(string)
-            .expect("String used to construct CString contained null byte");
+        let c_string =
+            CString::new(string).expect("String used to construct CString contained null byte");
         InputMethodName {
             c_string,
             string: string.to_owned(),

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

@@ -1,20 +1,24 @@
 // Important: all XIM calls need to happen from the same thread!
 
+mod callbacks;
+mod context;
 mod inner;
 mod input_method;
-mod context;
-mod callbacks;
 
-use std::sync::Arc;
-use std::sync::mpsc::{Receiver, Sender};
+use std::sync::{
+    mpsc::{Receiver, Sender},
+    Arc,
+};
 
 use super::{ffi, util, XConnection, XError};
 
-use self::inner::{close_im, ImeInner};
-use self::input_method::PotentialInputMethods;
-use self::context::ImeContext;
-use self::callbacks::*;
 pub use self::context::ImeContextCreationError;
+use self::{
+    callbacks::*,
+    context::ImeContext,
+    inner::{close_im, ImeInner},
+    input_method::PotentialInputMethods,
+};
 
 pub type ImeReceiver = Receiver<(ffi::Window, i16, i16)>;
 pub type ImeSender = Sender<(ffi::Window, i16, i16)>;
@@ -37,10 +41,7 @@ impl Ime {
         let potential_input_methods = PotentialInputMethods::new(&xconn);
 
         let (mut inner, client_data) = {
-            let mut inner = Box::new(ImeInner::new(
-                xconn,
-                potential_input_methods,
-            ));
+            let mut inner = Box::new(ImeInner::new(xconn, potential_input_methods));
             let inner_ptr = Box::into_raw(inner);
             let client_data = inner_ptr as _;
             let destroy_callback = ffi::XIMCallback {
@@ -54,9 +55,12 @@ impl Ime {
 
         let xconn = Arc::clone(&inner.xconn);
 
-        let input_method = inner.potential_input_methods.open_im(&xconn, Some(&|| {
+        let input_method = inner.potential_input_methods.open_im(
+            &xconn,
+            Some(&|| {
                 let _ = unsafe { set_instantiate_callback(&xconn, client_data) };
-        }));
+            }),
+        );
 
         let is_fallback = input_method.is_fallback();
         if let Some(input_method) = input_method.ok() {
@@ -84,19 +88,12 @@ impl Ime {
     // Ok(_) indicates that nothing went wrong internally
     // Ok(true) indicates that the action was actually performed
     // Ok(false) indicates that the action is not presently applicable
-    pub fn create_context(&mut self, window: ffi::Window)
-        -> Result<bool, ImeContextCreationError>
-    {
+    pub fn create_context(&mut self, window: ffi::Window) -> Result<bool, ImeContextCreationError> {
         let context = if self.is_destroyed() {
             // Create empty entry in map, so that when IME is rebuilt, this window has a context.
             None
         } else {
-            Some(unsafe { ImeContext::new(
-                &self.inner.xconn,
-                self.inner.im,
-                window,
-                None,
-            ) }?)
+            Some(unsafe { ImeContext::new(&self.inner.xconn, self.inner.im, window, None) }?)
         };
         self.inner.contexts.insert(window, context);
         Ok(!self.is_destroyed())

src/platform_impl/linux/x11/mod.rs

@@ -1,39 +1,47 @@
 #![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 
-pub mod ffi;
+mod dnd;
+mod event_processor;
 mod events;
+pub mod ffi;
+mod ime;
 mod monitor;
+pub mod util;
 mod window;
 mod xdisplay;
-mod dnd;
-mod ime;
-pub mod util;
-mod event_processor;
 
-pub use self::monitor::MonitorHandle;
-pub use self::window::UnownedWindow;
-pub use self::xdisplay::{XConnection, XNotSupported, XError};
+pub use self::{
+    monitor::MonitorHandle,
+    window::UnownedWindow,
+    xdisplay::{XConnection, XError, XNotSupported},
+};
 
-use std::{mem, slice};
-use std::cell::RefCell;
-use std::collections::{VecDeque, HashMap, HashSet};
-use std::ffi::CStr;
-use std::ops::Deref;
-use std::os::raw::*;
-use std::rc::Rc;
-use std::sync::{Arc, mpsc, Weak, Mutex};
+use std::{
+    cell::RefCell,
+    collections::{HashMap, HashSet, VecDeque},
+    ffi::CStr,
+    mem,
+    ops::Deref,
+    os::raw::*,
+    rc::Rc,
+    slice,
+    sync::{mpsc, Arc, Mutex, Weak},
+};
 
 use libc::{self, setlocale, LC_CTYPE};
 
-use crate::error::OsError as RootOsError;
-use crate::event_loop::{ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootELW};
-use crate::event::{WindowEvent, Event};
-use crate::platform_impl::PlatformSpecificWindowBuilderAttributes;
-use crate::platform_impl::platform::sticky_exit_callback;
-use crate::window::{WindowAttributes};
-use self::dnd::{Dnd, DndState};
-use self::ime::{ImeReceiver, ImeSender, ImeCreationError, Ime};
-use self::event_processor::EventProcessor;
+use self::{
+    dnd::{Dnd, DndState},
+    event_processor::EventProcessor,
+    ime::{Ime, ImeCreationError, ImeReceiver, ImeSender},
+};
+use crate::{
+    error::OsError as RootOsError,
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootELW},
+    platform_impl::{platform::sticky_exit_callback, PlatformSpecificWindowBuilderAttributes},
+    window::WindowAttributes,
+};
 
 pub struct EventLoopWindowTarget<T> {
     xconn: Arc<XConnection>,
@@ -43,7 +51,7 @@ pub struct EventLoopWindowTarget<T> {
     ime: RefCell<Ime>,
     windows: RefCell<HashMap<WindowId, Weak<UnownedWindow>>>,
     pending_redraws: Arc<Mutex<HashSet<WindowId>>>,
-    _marker: ::std::marker::PhantomData<T>
+    _marker: ::std::marker::PhantomData<T>,
 }
 
 pub struct EventLoop<T: 'static> {
@@ -53,7 +61,7 @@ pub struct EventLoop<T: 'static> {
     pending_user_events: Rc<RefCell<VecDeque<T>>>,
     user_sender: ::calloop::channel::Sender<T>,
     pending_events: Rc<RefCell<VecDeque<Event<T>>>>,
-    target: Rc<RootELW<T>>
+    target: Rc<RootELW<T>>,
 }
 
 #[derive(Clone)]
@@ -73,7 +81,9 @@ impl<T: 'static> EventLoop<T> {
         let (ime_sender, ime_receiver) = mpsc::channel();
         // Input methods will open successfully without setting the locale, but it won't be
         // possible to actually commit pre-edit sequences.
-        unsafe { setlocale(LC_CTYPE, b"\0".as_ptr() as *const _); }
+        unsafe {
+            setlocale(LC_CTYPE, b"\0".as_ptr() as *const _);
+        }
         let ime = RefCell::new({
             let result = Ime::new(Arc::clone(&xconn));
             if let Err(ImeCreationError::OpenFailure(ref state)) = result {
@@ -82,7 +92,8 @@ impl<T: 'static> EventLoop<T> {
             result.expect("Failed to set input method destruction callback")
         });
 
-        let randr_event_offset = xconn.select_xrandr_input(root)
+        let randr_event_offset = xconn
+            .select_xrandr_input(root)
             .expect("Failed to query XRandR extension");
 
         let xi2ext = unsafe {
@@ -96,7 +107,8 @@ impl<T: 'static> EventLoop<T> {
                 b"XInputExtension\0".as_ptr() as *const c_char,
                 &mut result.opcode as *mut c_int,
                 &mut result.first_event_id as *mut c_int,
-                &mut result.first_error_id as *mut c_int);
+                &mut result.first_error_id as *mut c_int,
+            );
             if res == ffi::False {
                 panic!("X server missing XInput extension");
             }
@@ -110,18 +122,18 @@ impl<T: 'static> EventLoop<T> {
                 xconn.display,
                 &mut xinput_major_ver,
                 &mut xinput_minor_ver,
-            ) != ffi::Success as libc::c_int {
+            ) != ffi::Success as libc::c_int
+            {
                 panic!(
                     "X server has XInput extension {}.{} but does not support XInput2",
-                    xinput_major_ver,
-                    xinput_minor_ver,
+                    xinput_major_ver, xinput_minor_ver,
                 );
             }
         }
 
         xconn.update_cached_wm_info(root);
 
-        let target = Rc::new(RootELW{
+        let target = Rc::new(RootELW {
             p: super::EventLoopWindowTarget::X(EventLoopWindowTarget {
                 ime,
                 root,
@@ -132,7 +144,7 @@ impl<T: 'static> EventLoop<T> {
                 wm_delete_window,
                 pending_redraws: Default::default(),
             }),
-            _marker: ::std::marker::PhantomData
+            _marker: ::std::marker::PhantomData,
         });
 
         // A calloop event loop to drive us
@@ -144,11 +156,14 @@ impl<T: 'static> EventLoop<T> {
 
         let (user_sender, user_channel) = ::calloop::channel::channel();
 
-        let _user_source = inner_loop.handle().insert_source(user_channel, move |evt, &mut()| {
+        let _user_source = inner_loop
+            .handle()
+            .insert_source(user_channel, move |evt, &mut ()| {
                 if let ::calloop::channel::Event::Msg(msg) = evt {
                     pending_user_events2.borrow_mut().push_back(msg);
                 }
-        }).unwrap();
+            })
+            .unwrap();
 
         // Handle X11 events
         let pending_events: Rc<RefCell<VecDeque<_>>> = Default::default();
@@ -164,20 +179,20 @@ impl<T: 'static> EventLoop<T> {
 
         // Register for device hotplug events
         // (The request buffer is flushed during `init_device`)
-        get_xtarget(&target).xconn.select_xinput_events(
-            root,
-            ffi::XIAllDevices,
-            ffi::XI_HierarchyChangedMask,
-        ).queue();
+        get_xtarget(&target)
+            .xconn
+            .select_xinput_events(root, ffi::XIAllDevices, ffi::XI_HierarchyChangedMask)
+            .queue();
 
         processor.init_device(ffi::XIAllDevices);
 
         // Setup the X11 event source
-        let mut x11_events = ::calloop::generic::Generic::from_raw_fd(get_xtarget(&target).xconn.x11_fd);
+        let mut x11_events =
+            ::calloop::generic::Generic::from_raw_fd(get_xtarget(&target).xconn.x11_fd);
         x11_events.set_interest(::calloop::mio::Ready::readable());
-        let _x11_source = inner_loop.handle().insert_source(
-            x11_events,
-            {
+        let _x11_source = inner_loop
+            .handle()
+            .insert_source(x11_events, {
                 let pending_events = pending_events.clone();
                 let mut callback = move |event| {
                     pending_events.borrow_mut().push_back(event);
@@ -191,8 +206,8 @@ impl<T: 'static> EventLoop<T> {
                         }
                     }
                 }
-            }
-        ).unwrap();
+            })
+            .unwrap();
 
         let result = EventLoop {
             inner_loop,
@@ -201,7 +216,7 @@ impl<T: 'static> EventLoop<T> {
             _user_source,
             user_sender,
             pending_user_events,
-            target
+            target,
         };
 
         result
@@ -224,7 +239,8 @@ impl<T: 'static> EventLoop<T> {
     }
 
     pub fn run_return<F>(&mut self, mut callback: F)
-        where F: FnMut(Event<T>, &RootELW<T>, &mut ControlFlow)
+    where
+        F: FnMut(Event<T>, &RootELW<T>, &mut ControlFlow),
     {
         let mut control_flow = ControlFlow::default();
         let wt = get_xtarget(&self.target);
@@ -246,7 +262,7 @@ impl<T: 'static> EventLoop<T> {
                         crate::event::Event::UserEvent(evt),
                         &self.target,
                         &mut control_flow,
-                        &mut callback
+                        &mut callback,
                     );
                 }
             }
@@ -257,11 +273,11 @@ impl<T: 'static> EventLoop<T> {
                     sticky_exit_callback(
                         Event::WindowEvent {
                             window_id: crate::window::WindowId(super::WindowId::X(wid)),
-                            event: WindowEvent::RedrawRequested
+                            event: WindowEvent::RedrawRequested,
                         },
                         &self.target,
                         &mut control_flow,
-                        &mut callback
+                        &mut callback,
                     );
                 }
             }
@@ -271,29 +287,37 @@ impl<T: 'static> EventLoop<T> {
                     crate::event::Event::EventsCleared,
                     &self.target,
                     &mut control_flow,
-                    &mut callback
+                    &mut callback,
                 );
             }
 
             // flush the X11 connection
-            unsafe { (wt.xconn.xlib.XFlush)(wt.xconn.display); }
+            unsafe {
+                (wt.xconn.xlib.XFlush)(wt.xconn.display);
+            }
 
             match control_flow {
                 ControlFlow::Exit => break,
                 ControlFlow::Poll => {
                     // non-blocking dispatch
-                    self.inner_loop.dispatch(Some(::std::time::Duration::from_millis(0)), &mut ()).unwrap();
-                    callback(crate::event::Event::NewEvents(crate::event::StartCause::Poll), &self.target, &mut control_flow);
+                    self.inner_loop
+                        .dispatch(Some(::std::time::Duration::from_millis(0)), &mut ())
+                        .unwrap();
+                    callback(
+                        crate::event::Event::NewEvents(crate::event::StartCause::Poll),
+                        &self.target,
+                        &mut control_flow,
+                    );
                 },
                 ControlFlow::Wait => {
                     self.inner_loop.dispatch(None, &mut ()).unwrap();
                     callback(
                         crate::event::Event::NewEvents(crate::event::StartCause::WaitCancelled {
                             start: ::std::time::Instant::now(),
-                            requested_resume: None
+                            requested_resume: None,
                         }),
                         &self.target,
-                        &mut control_flow
+                        &mut control_flow,
                     );
                 },
                 ControlFlow::WaitUntil(deadline) => {
@@ -308,32 +332,41 @@ impl<T: 'static> EventLoop<T> {
                     let now = std::time::Instant::now();
                     if now < deadline {
                         callback(
-                            crate::event::Event::NewEvents(crate::event::StartCause::WaitCancelled {
+                            crate::event::Event::NewEvents(
+                                crate::event::StartCause::WaitCancelled {
                                     start,
-                                requested_resume: Some(deadline)
-                            }),
+                                    requested_resume: Some(deadline),
+                                },
+                            ),
                             &self.target,
-                            &mut control_flow
+                            &mut control_flow,
                         );
                     } else {
                         callback(
-                            crate::event::Event::NewEvents(crate::event::StartCause::ResumeTimeReached {
+                            crate::event::Event::NewEvents(
+                                crate::event::StartCause::ResumeTimeReached {
                                     start,
-                                requested_resume: deadline
-                            }),
+                                    requested_resume: deadline,
+                                },
+                            ),
                             &self.target,
-                            &mut control_flow
+                            &mut control_flow,
                         );
                     }
-                }
+                },
             }
         }
 
-        callback(crate::event::Event::LoopDestroyed, &self.target, &mut control_flow);
+        callback(
+            crate::event::Event::LoopDestroyed,
+            &self.target,
+            &mut control_flow,
+        );
     }
 
     pub fn run<F>(mut self, callback: F) -> !
-        where F: 'static + FnMut(Event<T>, &RootELW<T>, &mut ControlFlow)
+    where
+        F: 'static + FnMut(Event<T>, &RootELW<T>, &mut ControlFlow),
     {
         self.run_return(callback);
         ::std::process::exit(0);
@@ -365,9 +398,7 @@ impl<'a> DeviceInfo<'a> {
         unsafe {
             let mut count = mem::uninitialized();
             let info = (xconn.xinput2.XIQueryDevice)(xconn.display, device, &mut count);
-            xconn.check_errors()
-                .ok()
-                .and_then(|_| {
+            xconn.check_errors().ok().and_then(|_| {
                 if info.is_null() || count == 0 {
                     None
                 } else {
@@ -428,10 +459,11 @@ impl Window {
     pub fn new<T>(
         event_loop: &EventLoopWindowTarget<T>,
         attribs: WindowAttributes,
-        pl_attribs: PlatformSpecificWindowBuilderAttributes
+        pl_attribs: PlatformSpecificWindowBuilderAttributes,
     ) -> Result<Self, RootOsError> {
         let window = Arc::new(UnownedWindow::new(&event_loop, attribs, pl_attribs)?);
-        event_loop.windows
+        event_loop
+            .windows
             .borrow_mut()
             .insert(window.id(), Arc::downgrade(&window));
         Ok(Window(window))
@@ -454,11 +486,14 @@ impl Drop for Window {
 /// extract the cookie from a GenericEvent XEvent and release the cookie data once it has been processed
 struct GenericEventCookie<'a> {
     xconn: &'a XConnection,
-    cookie: ffi::XGenericEventCookie
+    cookie: ffi::XGenericEventCookie,
 }
 
 impl<'a> GenericEventCookie<'a> {
-    fn from_event<'b>(xconn: &'b XConnection, event: ffi::XEvent) -> Option<GenericEventCookie<'b>> {
+    fn from_event<'b>(
+        xconn: &'b XConnection,
+        event: ffi::XEvent,
+    ) -> Option<GenericEventCookie<'b>> {
         unsafe {
             let mut cookie: ffi::XGenericEventCookie = From::from(event);
             if (xconn.xlib.XGetEventData)(xconn.display, &mut cookie) == ffi::True {
@@ -485,8 +520,12 @@ struct XExtension {
     first_error_id: c_int,
 }
 
-fn mkwid(w: ffi::Window) -> crate::window::WindowId { crate::window::WindowId(crate::platform_impl::WindowId::X(WindowId(w))) }
-fn mkdid(w: c_int) -> crate::event::DeviceId { crate::event::DeviceId(crate::platform_impl::DeviceId::X(DeviceId(w))) }
+fn mkwid(w: ffi::Window) -> crate::window::WindowId {
+    crate::window::WindowId(crate::platform_impl::WindowId::X(WindowId(w)))
+}
+fn mkdid(w: c_int) -> crate::event::DeviceId {
+    crate::event::DeviceId(crate::platform_impl::DeviceId::X(DeviceId(w)))
+}
 
 #[derive(Debug)]
 struct Device {
@@ -525,32 +564,39 @@ impl Device {
                 | ffi::XI_RawKeyPressMask
                 | ffi::XI_RawKeyReleaseMask;
             // The request buffer is flushed when we poll for events
-            wt.xconn.select_xinput_events(wt.root, info.deviceid, mask).queue();
+            wt.xconn
+                .select_xinput_events(wt.root, info.deviceid, mask)
+                .queue();
 
             // Identify scroll axes
             for class_ptr in Device::classes(info) {
                 let class = unsafe { &**class_ptr };
                 match class._type {
                     ffi::XIScrollClass => {
-                        let info = unsafe { mem::transmute::<&ffi::XIAnyClassInfo, &ffi::XIScrollClassInfo>(class) };
-                        scroll_axes.push((info.number, ScrollAxis {
+                        let info = unsafe {
+                            mem::transmute::<&ffi::XIAnyClassInfo, &ffi::XIScrollClassInfo>(class)
+                        };
+                        scroll_axes.push((
+                            info.number,
+                            ScrollAxis {
                                 increment: info.increment,
                                 orientation: match info.scroll_type {
                                     ffi::XIScrollTypeHorizontal => ScrollOrientation::Horizontal,
                                     ffi::XIScrollTypeVertical => ScrollOrientation::Vertical,
-                                _ => { unreachable!() }
+                                    _ => unreachable!(),
                                 },
                                 position: 0.0,
-                        }));
-                    }
-                    _ => {}
+                            },
+                        ));
+                    },
+                    _ => {},
                 }
             }
         }
 
         let mut device = Device {
             name: name.into_owned(),
-            scroll_axes: scroll_axes,
+            scroll_axes,
             attachment: info.attachment,
         };
         device.reset_scroll_position(info);
@@ -563,12 +609,18 @@ impl Device {
                 let class = unsafe { &**class_ptr };
                 match class._type {
                     ffi::XIValuatorClass => {
-                        let info = unsafe { mem::transmute::<&ffi::XIAnyClassInfo, &ffi::XIValuatorClassInfo>(class) };
-                        if let Some(&mut (_, ref mut axis)) = self.scroll_axes.iter_mut().find(|&&mut (axis, _)| axis == info.number) {
+                        let info = unsafe {
+                            mem::transmute::<&ffi::XIAnyClassInfo, &ffi::XIValuatorClassInfo>(class)
+                        };
+                        if let Some(&mut (_, ref mut axis)) = self
+                            .scroll_axes
+                            .iter_mut()
+                            .find(|&&mut (axis, _)| axis == info.number)
+                        {
                             axis.position = info.value;
                         }
-                    }
-                    _ => {}
+                    },
+                    _ => {},
                 }
             }
         }
@@ -576,11 +628,18 @@ impl Device {
 
     #[inline]
     fn physical_device(info: &ffi::XIDeviceInfo) -> bool {
-        info._use == ffi::XISlaveKeyboard || info._use == ffi::XISlavePointer || info._use == ffi::XIFloatingSlave
+        info._use == ffi::XISlaveKeyboard
+            || info._use == ffi::XISlavePointer
+            || info._use == ffi::XIFloatingSlave
     }
 
     #[inline]
     fn classes(info: &ffi::XIDeviceInfo) -> &[*const ffi::XIAnyClassInfo] {
-        unsafe { slice::from_raw_parts(info.classes as *const *const ffi::XIAnyClassInfo, info.num_classes as usize) }
+        unsafe {
+            slice::from_raw_parts(
+                info.classes as *const *const ffi::XIAnyClassInfo,
+                info.num_classes as usize,
+            )
+        }
     }
 }

src/platform_impl/linux/x11/monitor.rs

@@ -2,16 +2,16 @@ use std::os::raw::*;
 
 use parking_lot::Mutex;
 
-use crate::dpi::{PhysicalPosition, PhysicalSize};
-use crate::monitor::VideoMode;
-use super::{util, XConnection, XError};
-use super::ffi::{
-    RRCrtcChangeNotifyMask,
-    RROutputPropertyNotifyMask,
-    RRScreenChangeNotifyMask,
-    True,
-    Window,
+use super::{
+    ffi::{
+        RRCrtcChangeNotifyMask, RROutputPropertyNotifyMask, RRScreenChangeNotifyMask, True, Window,
         XRRScreenResources,
+    },
+    util, XConnection, XError,
+};
+use crate::{
+    dpi::{PhysicalPosition, PhysicalSize},
+    monitor::VideoMode,
 };
 
 // Used to test XRandR < 1.5 code path. This should always be committed as false.
@@ -160,7 +160,8 @@ impl XConnection {
                 // videowalls.
                 let xrandr_1_5 = self.xrandr_1_5.as_ref().unwrap();
                 let mut monitor_count = 0;
-                let monitors = (xrandr_1_5.XRRGetMonitors)(self.display, root, 1, &mut monitor_count);
+                let monitors =
+                    (xrandr_1_5.XRRGetMonitors)(self.display, root, 1, &mut monitor_count);
                 assert!(monitor_count >= 0);
                 available = Vec::with_capacity(monitor_count as usize);
                 for monitor_index in 0..monitor_count {
@@ -173,7 +174,8 @@ impl XConnection {
                         monitor_index as u32,
                         monitor.into(),
                         is_primary,
-                    ).map(|monitor_id| available.push(monitor_id));
+                    )
+                    .map(|monitor_id| available.push(monitor_id));
                 }
                 (xrandr_1_5.XRRFreeMonitors)(monitors);
             } else {
@@ -190,13 +192,8 @@ impl XConnection {
                         let crtc = util::MonitorRepr::from(crtc);
                         let is_primary = crtc.get_output() == primary;
                         has_primary |= is_primary;
-                        MonitorHandle::from_repr(
-                            self,
-                            resources,
-                            crtc_id as u32,
-                            crtc,
-                            is_primary,
-                        ).map(|monitor_id| available.push(monitor_id));
+                        MonitorHandle::from_repr(self, resources, crtc_id as u32, crtc, is_primary)
+                            .map(|monitor_id| available.push(monitor_id));
                     }
                     (self.xrandr.XRRFreeCrtcInfo)(crtc);
                 }
@@ -244,13 +241,8 @@ impl XConnection {
             if version_lock.is_none() {
                 let mut major = 0;
                 let mut minor = 0;
-                let has_extension = unsafe {
-                    (self.xrandr.XRRQueryVersion)(
-                        self.display,
-                        &mut major,
-                        &mut minor,
-                    )
-                };
+                let has_extension =
+                    unsafe { (self.xrandr.XRRQueryVersion)(self.display, &mut major, &mut minor) };
                 if has_extension != True {
                     panic!("[winit] XRandR extension not available.");
                 }
@@ -261,11 +253,7 @@ impl XConnection {
         let mut event_offset = 0;
         let mut error_offset = 0;
         let status = unsafe {
-            (self.xrandr.XRRQueryExtension)(
-                self.display,
-                &mut event_offset,
-                &mut error_offset,
-            )
+            (self.xrandr.XRRQueryExtension)(self.display, &mut event_offset, &mut error_offset)
         };
 
         if status != True {
@@ -273,9 +261,7 @@ impl XConnection {
             unreachable!("[winit] `XRRQueryExtension` failed but no error was received.");
         }
 
-        let mask = RRCrtcChangeNotifyMask
-            | RROutputPropertyNotifyMask
-            | RRScreenChangeNotifyMask;
+        let mask = RRCrtcChangeNotifyMask | RROutputPropertyNotifyMask | RRScreenChangeNotifyMask;
         unsafe { (self.xrandr.XRRSelectInput)(self.display, root, mask) };
 
         Ok(event_offset)

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

@@ -1,7 +1,9 @@
-use std::collections::HashMap;
-use std::ffi::{CStr, CString};
-use std::fmt::Debug;
-use std::os::raw::*;
+use std::{
+    collections::HashMap,
+    ffi::{CStr, CString},
+    fmt::Debug,
+    os::raw::*,
+};
 
 use parking_lot::Mutex;
 
@@ -21,11 +23,9 @@ impl XConnection {
         if let Some(atom) = cached_atom {
             atom
         } else {
-            let atom = unsafe { (self.xlib.XInternAtom)(
-                self.display,
-                name.as_ptr() as *const c_char,
-                ffi::False,
-            ) };
+            let atom = unsafe {
+                (self.xlib.XInternAtom)(self.display, name.as_ptr() as *const c_char, ffi::False)
+            };
             if atom == 0 {
                 let msg = format!(
                     "`XInternAtom` failed, which really shouldn't happen. Atom: {:?}, Error: {:#?}",

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

@@ -1,6 +1,4 @@
-use std::fmt::Debug;
-use std::mem;
-use std::os::raw::*;
+use std::{fmt::Debug, mem, os::raw::*};
 
 // This isn't actually the number of the bits in the format.
 // X11 does a match on this value to determine which type to call sizeof on.
@@ -50,9 +48,21 @@ 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_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; }
-impl Formattable for c_long { const FORMAT: Format = Format::Long; }
-impl Formattable for c_ulong { const FORMAT: Format = Format::Long; }
+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;
+}
+impl Formattable for c_long {
+    const FORMAT: Format = Format::Long;
+}
+impl Formattable for c_ulong {
+    const FORMAT: Format = Format::Long;
+}

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

@@ -16,7 +16,12 @@ 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);
-        AaRect { x, y, width, height }
+        AaRect {
+            x,
+            y,
+            width,
+            height,
+        }
     }
 
     pub fn contains_point(&self, x: i64, y: i64) -> bool {
@@ -73,7 +78,12 @@ pub struct FrameExtents {
 
 impl FrameExtents {
     pub fn new(left: c_ulong, right: c_ulong, top: c_ulong, bottom: c_ulong) -> Self {
-        FrameExtents { left, right, top, bottom }
+        FrameExtents {
+            left,
+            right,
+            top,
+            bottom,
+        }
     }
 
     pub fn from_border(border: c_ulong) -> Self {
@@ -116,13 +126,20 @@ impl FrameExtentsHeuristic {
     pub fn inner_pos_to_outer(&self, x: i32, y: i32) -> (i32, i32) {
         use self::FrameExtentsHeuristicPath::*;
         if self.heuristic_path != UnsupportedBordered {
-            (x - self.frame_extents.left as i32, y - self.frame_extents.top as i32)
+            (
+                x - self.frame_extents.left as i32,
+                y - self.frame_extents.top as i32,
+            )
         } else {
             (x, y)
         }
     }
 
-    pub fn inner_pos_to_outer_logical(&self, mut logical: LogicalPosition, factor: f64) -> LogicalPosition {
+    pub fn inner_pos_to_outer_logical(
+        &self,
+        mut logical: LogicalPosition,
+        factor: f64,
+    ) -> LogicalPosition {
         use self::FrameExtentsHeuristicPath::*;
         if self.heuristic_path != UnsupportedBordered {
             let frame_extents = self.frame_extents.as_logical(factor);
@@ -135,15 +152,23 @@ impl FrameExtentsHeuristic {
     pub fn inner_size_to_outer(&self, width: u32, height: u32) -> (u32, u32) {
         (
             width.saturating_add(
-                self.frame_extents.left.saturating_add(self.frame_extents.right) as u32
+                self.frame_extents
+                    .left
+                    .saturating_add(self.frame_extents.right) as u32,
             ),
             height.saturating_add(
-                self.frame_extents.top.saturating_add(self.frame_extents.bottom) as u32
+                self.frame_extents
+                    .top
+                    .saturating_add(self.frame_extents.bottom) as u32,
             ),
         )
     }
 
-    pub fn inner_size_to_outer_logical(&self, mut logical: LogicalSize, factor: f64) -> LogicalSize {
+    pub fn inner_size_to_outer_logical(
+        &self,
+        mut logical: LogicalSize,
+        factor: f64,
+    ) -> LogicalSize {
         let frame_extents = self.frame_extents.as_logical(factor);
         logical.width += frame_extents.left + frame_extents.right;
         logical.height += frame_extents.top + frame_extents.bottom;
@@ -153,7 +178,11 @@ impl FrameExtentsHeuristic {
 
 impl XConnection {
     // This is adequate for inner_position
-    pub fn translate_coords(&self, window: ffi::Window, root: ffi::Window) -> Result<TranslatedCoords, XError> {
+    pub fn translate_coords(
+        &self,
+        window: ffi::Window,
+        root: ffi::Window,
+    ) -> Result<TranslatedCoords, XError> {
         let mut translated_coords: TranslatedCoords = unsafe { mem::uninitialized() };
         unsafe {
             (self.xlib.XTranslateCoordinates)(
@@ -201,11 +230,9 @@ impl XConnection {
         // Of the WMs tested, xmonad, i3, dwm, IceWM (1.3.x and earlier), and blackbox don't
         // support this. As this is part of EWMH (Extended Window Manager Hints), it's likely to
         // be unsupported by many smaller WMs.
-        let extents: Option<Vec<c_ulong>> = self.get_property(
-            window,
-            extents_atom,
-            ffi::XA_CARDINAL,
-        ).ok();
+        let extents: Option<Vec<c_ulong>> = self
+            .get_property(window, extents_atom, ffi::XA_CARDINAL)
+            .ok();
 
         extents.and_then(|extents| {
             if extents.len() >= 4 {
@@ -228,11 +255,9 @@ impl XConnection {
             return None;
         }
 
-        let client_list: Option<Vec<ffi::Window>> = self.get_property(
-            root,
-            client_list_atom,
-            ffi::XA_WINDOW,
-        ).ok();
+        let client_list: Option<Vec<ffi::Window>> = self
+            .get_property(root, client_list_atom, ffi::XA_WINDOW)
+            .ok();
 
         client_list.map(|client_list| client_list.contains(&window))
     }
@@ -264,7 +289,11 @@ impl XConnection {
         self.check_errors().map(|_| parent)
     }
 
-    fn climb_hierarchy(&self, window: ffi::Window, root: ffi::Window) -> Result<ffi::Window, XError> {
+    fn climb_hierarchy(
+        &self,
+        window: ffi::Window,
+        root: ffi::Window,
+    ) -> Result<ffi::Window, XError> {
         let mut outer_window = window;
         loop {
             let candidate = self.get_parent_window(outer_window)?;
@@ -276,7 +305,11 @@ impl XConnection {
         Ok(outer_window)
     }
 
-    pub fn get_frame_extents_heuristic(&self, window: ffi::Window, root: ffi::Window) -> FrameExtentsHeuristic {
+    pub fn get_frame_extents_heuristic(
+        &self,
+        window: ffi::Window,
+        root: ffi::Window,
+    ) -> FrameExtentsHeuristic {
         use self::FrameExtentsHeuristicPath::*;
 
         // Position relative to root window.
@@ -284,15 +317,16 @@ impl XConnection {
         // isn't nested are outlined in the comments throghout this function, but in addition to
         // that, fullscreen windows often aren't nested.
         let (inner_y_rel_root, child) = {
-            let coords = self.translate_coords(window, root).expect("Failed to translate window coordinates");
-            (
-                coords.y_rel_root,
-                coords.child,
-            )
+            let coords = self
+                .translate_coords(window, root)
+                .expect("Failed to translate window coordinates");
+            (coords.y_rel_root, coords.child)
         };
 
         let (width, height, border) = {
-            let inner_geometry = self.get_geometry(window).expect("Failed to get inner window geometry");
+            let inner_geometry = self
+                .get_geometry(window)
+                .expect("Failed to get inner window geometry");
             (
                 inner_geometry.width,
                 inner_geometry.height,
@@ -343,9 +377,13 @@ impl XConnection {
             // If the position value we have is for a nested window used as the client area, we'll
             // just climb up the hierarchy and get the geometry of the outermost window we're
             // nested in.
-            let outer_window = self.climb_hierarchy(window, root).expect("Failed to climb window hierarchy");
+            let outer_window = self
+                .climb_hierarchy(window, root)
+                .expect("Failed to climb window hierarchy");
             let (outer_y, outer_width, outer_height) = {
-                let outer_geometry = self.get_geometry(outer_window).expect("Failed to get outer window geometry");
+                let outer_geometry = self
+                    .get_geometry(outer_window)
+                    .expect("Failed to get outer window geometry");
                 (
                     outer_geometry.y_rel_parent,
                     outer_geometry.width,
@@ -364,12 +402,8 @@ impl XConnection {
             let top = offset_y;
             let bottom = diff_y.saturating_sub(offset_y);
 
-            let frame_extents = FrameExtents::new(
-                left.into(),
-                right.into(),
-                top.into(),
-                bottom.into(),
-            );
+            let frame_extents =
+                FrameExtents::new(left.into(), right.into(), top.into(), bottom.into());
             FrameExtentsHeuristic {
                 frame_extents,
                 heuristic_path: UnsupportedNested,

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

@@ -99,7 +99,9 @@ pub struct NormalHints<'a> {
 
 impl<'a> NormalHints<'a> {
     pub fn new(xconn: &'a XConnection) -> Self {
-        NormalHints { size_hints: xconn.alloc_size_hints() }
+        NormalHints {
+            size_hints: xconn.alloc_size_hints(),
+        }
     }
 
     pub fn has_flag(&self, flag: c_long) -> bool {
@@ -130,7 +132,11 @@ impl<'a> NormalHints<'a> {
     }
 
     pub fn get_max_size(&self) -> Option<(u32, u32)> {
-        self.getter(ffi::PMaxSize, &self.size_hints.max_width, &self.size_hints.max_height)
+        self.getter(
+            ffi::PMaxSize,
+            &self.size_hints.max_width,
+            &self.size_hints.max_height,
+        )
     }
 
     pub fn set_max_size(&mut self, max_size: Option<(u32, u32)>) {
@@ -144,7 +150,11 @@ impl<'a> NormalHints<'a> {
     }
 
     pub fn get_min_size(&self) -> Option<(u32, u32)> {
-        self.getter(ffi::PMinSize, &self.size_hints.min_width, &self.size_hints.min_height)
+        self.getter(
+            ffi::PMinSize,
+            &self.size_hints.min_width,
+            &self.size_hints.min_height,
+        )
     }
 
     pub fn set_min_size(&mut self, min_size: Option<(u32, u32)>) {
@@ -158,7 +168,11 @@ impl<'a> NormalHints<'a> {
     }
 
     pub fn get_resize_increments(&self) -> Option<(u32, u32)> {
-        self.getter(ffi::PResizeInc, &self.size_hints.width_inc, &self.size_hints.height_inc)
+        self.getter(
+            ffi::PResizeInc,
+            &self.size_hints.width_inc,
+            &self.size_hints.height_inc,
+        )
     }
 
     pub fn set_resize_increments(&mut self, resize_increments: Option<(u32, u32)>) {
@@ -172,7 +186,11 @@ impl<'a> NormalHints<'a> {
     }
 
     pub fn get_base_size(&self) -> Option<(u32, u32)> {
-        self.getter(ffi::PBaseSize, &self.size_hints.base_width, &self.size_hints.base_height)
+        self.getter(
+            ffi::PBaseSize,
+            &self.size_hints.base_width,
+            &self.size_hints.base_height,
+        )
     }
 
     pub fn set_base_size(&mut self, base_size: Option<(u32, u32)>) {
@@ -187,7 +205,10 @@ impl<'a> NormalHints<'a> {
 }
 
 impl XConnection {
-    pub fn get_wm_hints(&self, window: ffi::Window) -> Result<XSmartPointer<'_, ffi::XWMHints>, XError> {
+    pub fn get_wm_hints(
+        &self,
+        window: ffi::Window,
+    ) -> Result<XSmartPointer<'_, ffi::XWMHints>, XError> {
         let wm_hints = unsafe { (self.xlib.XGetWMHints)(self.display, window) };
         self.check_errors()?;
         let wm_hints = if wm_hints.is_null() {
@@ -198,13 +219,13 @@ impl XConnection {
         Ok(wm_hints)
     }
 
-    pub fn set_wm_hints(&self, window: ffi::Window, wm_hints: XSmartPointer<'_, ffi::XWMHints>) -> Flusher<'_> {
+    pub fn set_wm_hints(
+        &self,
+        window: ffi::Window,
+        wm_hints: XSmartPointer<'_, ffi::XWMHints>,
+    ) -> Flusher<'_> {
         unsafe {
-            (self.xlib.XSetWMHints)(
-                self.display,
-                window,
-                wm_hints.ptr,
-            );
+            (self.xlib.XSetWMHints)(self.display, window, wm_hints.ptr);
         }
         Flusher::new(self)
     }
@@ -223,13 +244,13 @@ impl XConnection {
         self.check_errors().map(|_| NormalHints { size_hints })
     }
 
-    pub fn set_normal_hints(&self, window: ffi::Window, normal_hints: NormalHints<'_>) -> Flusher<'_> {
+    pub fn set_normal_hints(
+        &self,
+        window: ffi::Window,
+        normal_hints: NormalHints<'_>,
+    ) -> Flusher<'_> {
         unsafe {
-            (self.xlib.XSetWMNormalHints)(
-                self.display,
-                window,
-                normal_hints.size_hints.ptr,
-            );
+            (self.xlib.XSetWMNormalHints)(self.display, window, normal_hints.size_hints.ptr);
         }
         Flusher::new(self)
     }

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

@@ -1,5 +1,5 @@
-use crate::window::{Icon, Pixel, PIXEL_SIZE};
 use super::*;
+use crate::window::{Icon, Pixel, PIXEL_SIZE};
 
 impl Pixel {
     pub fn to_packed_argb(&self) -> Cardinal {

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

@@ -55,7 +55,12 @@ impl<'a> Drop for PointerState<'a> {
 }
 
 impl XConnection {
-    pub fn select_xinput_events(&self, window: c_ulong, device_id: c_int, mask: i32) -> Flusher<'_> {
+    pub fn select_xinput_events(
+        &self,
+        window: c_ulong,
+        device_id: c_int,
+        mask: i32,
+    ) -> Flusher<'_> {
         let mut event_mask = ffi::XIEventMask {
             deviceid: device_id,
             mask: &mask as *const _ as *mut c_uchar,
@@ -74,14 +79,7 @@ impl XConnection {
 
     #[allow(dead_code)]
     pub fn select_xkb_events(&self, device_id: c_uint, mask: c_ulong) -> Option<Flusher<'_>> {
-        let status = unsafe {
-            (self.xlib.XkbSelectEvents)(
-                self.display,
-                device_id,
-                mask,
-                mask,
-            )
-        };
+        let status = unsafe { (self.xlib.XkbSelectEvents)(self.display, device_id, mask, mask) };
         if status == ffi::True {
             Some(Flusher::new(self))
         } else {
@@ -89,7 +87,11 @@ impl XConnection {
         }
     }
 
-    pub fn query_pointer(&self, window: ffi::Window, device_id: c_int) -> Result<PointerState<'_>, XError> {
+    pub fn query_pointer(
+        &self,
+        window: ffi::Window,
+        device_id: c_int,
+    ) -> Result<PointerState<'_>, XError> {
         unsafe {
             let mut pointer_state: PointerState<'_> = mem::uninitialized();
             pointer_state.xconn = self;

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

@@ -12,10 +12,7 @@ impl<'a, T> XSmartPointer<'a, T> {
     // Returns None if ptr is null.
     pub fn new(xconn: &'a XConnection, ptr: *mut T) -> Option<Self> {
         if !ptr.is_null() {
-            Some(XSmartPointer {
-                xconn,
-                ptr,
-            })
+            Some(XSmartPointer { xconn, ptr })
         } else {
             None
         }

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

@@ -13,22 +13,12 @@ mod randr;
 mod window_property;
 mod wm;
 
-pub use self::atom::*;
-pub use self::client_msg::*;
-pub use self::format::*;
-pub use self::geometry::*;
-pub use self::hint::*;
-pub use self::icon::*;
-pub use self::input::*;
-pub use self::memory::*;
-pub use self::randr::*;
-pub use self::window_property::*;
-pub use self::wm::*;
+pub use self::{
+    atom::*, client_msg::*, format::*, geometry::*, hint::*, icon::*, input::*, memory::*,
+    randr::*, window_property::*, wm::*,
+};
 
-use std::mem;
-use std::ptr;
-use std::ops::BitAnd;
-use std::os::raw::*;
+use std::{mem, ops::BitAnd, os::raw::*, ptr};
 
 use super::{ffi, XConnection, XError};
 
@@ -48,8 +38,8 @@ pub fn maybe_change<T: PartialEq>(field: &mut Option<T>, value: T) -> bool {
 }
 
 pub fn has_flag<T>(bitset: T, flag: T) -> bool
-where T:
-    Copy + PartialEq + BitAnd<T, Output = T>
+where
+    T: Copy + PartialEq + BitAnd<T, Output = T>,
 {
     bitset & flag == flag
 }

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

@@ -1,9 +1,7 @@
-use std::{env, slice};
-use std::str::FromStr;
+use std::{env, slice, str::FromStr};
 
-use crate::monitor::VideoMode;
-use crate::dpi::validate_hidpi_factor;
 use super::*;
+use crate::{dpi::validate_hidpi_factor, monitor::VideoMode};
 
 pub fn calc_dpi_factor(
     (width_px, height_px): (u32, u32),
@@ -29,9 +27,7 @@ pub fn calc_dpi_factor(
         return 1.0;
     }
 
-    let ppmm = (
-        (width_px as f64 * height_px as f64) / (width_mm as f64 * height_mm as f64)
-    ).sqrt();
+    let ppmm = ((width_px as f64 * height_px as f64) / (width_mm as f64 * height_mm as f64)).sqrt();
     // Quantize 1/12 step size
     let dpi_factor = ((ppmm * (12.0 * 25.4 / 96.0)).round() / 12.0).max(1.0);
     assert!(validate_hidpi_factor(dpi_factor));
@@ -88,7 +84,7 @@ impl XConnection {
             return None;
         }
         if let Ok(res) = ::std::ffi::CStr::from_ptr(resource_manager_str).to_str() {
-            let name : &str = "Xft.dpi:\t";
+            let name: &str = "Xft.dpi:\t";
             for pair in res.split("\n") {
                 if pair.starts_with(&name) {
                     let res = &pair[name.len()..];
@@ -103,11 +99,8 @@ impl XConnection {
         resources: *mut ffi::XRRScreenResources,
         repr: &MonitorRepr,
     ) -> Option<(String, f64, Vec<VideoMode>)> {
-        let output_info = (self.xrandr.XRRGetOutputInfo)(
-            self.display,
-            resources,
-            repr.get_output(),
-        );
+        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.
@@ -152,7 +145,10 @@ impl XConnection {
         } else {
             calc_dpi_factor(
                 repr.size(),
-                ((*output_info).mm_width as u64, (*output_info).mm_height as u64),
+                (
+                    (*output_info).mm_width as u64,
+                    (*output_info).mm_height as u64,
+                ),
             )
         };
 

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

@@ -84,10 +84,8 @@ impl XConnection {
 
                 if !buf.is_null() {
                     offset += PROPERTY_BUFFER_SIZE;
-                    let new_data = std::slice::from_raw_parts(
-                        buf as *mut T,
-                        quantity_returned as usize,
-                    );
+                    let new_data =
+                        std::slice::from_raw_parts(buf as *mut T, quantity_returned as usize);
                     /*println!(
                         "XGetWindowProperty prop:{:?} fmt:{:02} len:{:02} off:{:02} out:{:02}, buf:{:?}",
                         property,

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

@@ -28,11 +28,8 @@ impl XConnection {
 
     fn get_supported_hints(&self, root: ffi::Window) -> Vec<ffi::Atom> {
         let supported_atom = unsafe { self.get_atom_unchecked(b"_NET_SUPPORTED\0") };
-        self.get_property(
-            root,
-            supported_atom,
-            ffi::XA_ATOM,
-        ).unwrap_or_else(|_| Vec::with_capacity(0))
+        self.get_property(root, supported_atom, ffi::XA_ATOM)
+            .unwrap_or_else(|_| Vec::with_capacity(0))
     }
 
     fn get_wm_name(&self, root: ffi::Window) -> Option<String> {
@@ -61,15 +58,9 @@ impl XConnection {
         // Querying this property on the root window will give us the ID of a child window created by
         // the WM.
         let root_window_wm_check = {
-            let result = self.get_property(
-                root,
-                check_atom,
-                ffi::XA_WINDOW,
-            );
+            let result = self.get_property(root, check_atom, ffi::XA_WINDOW);
 
-            let wm_check = result
-                .ok()
-                .and_then(|wm_check| wm_check.get(0).cloned());
+            let wm_check = result.ok().and_then(|wm_check| wm_check.get(0).cloned());
 
             if let Some(wm_check) = wm_check {
                 wm_check
@@ -81,15 +72,9 @@ impl XConnection {
         // Querying the same property on the child window we were given, we should get this child
         // window's ID again.
         let child_window_wm_check = {
-            let result = self.get_property(
-                root_window_wm_check,
-                check_atom,
-                ffi::XA_WINDOW,
-            );
+            let result = self.get_property(root_window_wm_check, check_atom, ffi::XA_WINDOW);
 
-            let wm_check = result
-                .ok()
-                .and_then(|wm_check| wm_check.get(0).cloned());
+            let wm_check = result.ok().and_then(|wm_check| wm_check.get(0).cloned());
 
             if let Some(wm_check) = wm_check {
                 wm_check
@@ -107,11 +92,7 @@ impl XConnection {
         let wm_name = {
             let utf8_string_atom = unsafe { self.get_atom_unchecked(b"UTF8_STRING\0") };
 
-            let result = self.get_property(
-                root_window_wm_check,
-                wm_name_atom,
-                utf8_string_atom,
-            );
+            let result = self.get_property(root_window_wm_check, wm_name_atom, utf8_string_atom);
 
             // IceWM requires this. IceWM was also the only WM tested that returns a null-terminated
             // string. For more fun trivia, IceWM is also unique in including version and uname
@@ -126,15 +107,12 @@ impl XConnection {
             };
 
             if no_utf8 {
-                self.get_property(
-                    root_window_wm_check,
-                    wm_name_atom,
-                    ffi::XA_STRING,
-                )
+                self.get_property(root_window_wm_check, wm_name_atom, ffi::XA_STRING)
             } else {
                 result
             }
-        }.ok();
+        }
+        .ok();
 
         wm_name.and_then(|wm_name| String::from_utf8(wm_name).ok())
     }

src/platform_impl/linux/x11/window.rs

@@ -1,23 +1,20 @@
-use std::{cmp, env, mem};
-use std::collections::HashSet;
-use std::ffi::CString;
-use std::os::raw::*;
-use std::path::Path;
-use std::sync::Arc;
+use std::{cmp, collections::HashSet, env, ffi::CString, mem, os::raw::*, path::Path, sync::Arc};
 
 use libc;
 use parking_lot::Mutex;
 
-use crate::error::{ExternalError, NotSupportedError, OsError as RootOsError};
-use crate::window::{Icon, CursorIcon, WindowAttributes};
-use crate::dpi::{LogicalPosition, LogicalSize};
-use crate::platform_impl::MonitorHandle as PlatformMonitorHandle;
-use crate::platform_impl::{OsError, PlatformSpecificWindowBuilderAttributes};
-use crate::platform_impl::x11::ime::ImeContextCreationError;
-use crate::platform_impl::x11::MonitorHandle as X11MonitorHandle;
-use crate::monitor::MonitorHandle as RootMonitorHandle;
+use crate::{
+    dpi::{LogicalPosition, LogicalSize},
+    error::{ExternalError, NotSupportedError, OsError as RootOsError},
+    monitor::MonitorHandle as RootMonitorHandle,
+    platform_impl::{
+        x11::{ime::ImeContextCreationError, MonitorHandle as X11MonitorHandle},
+        MonitorHandle as PlatformMonitorHandle, OsError, PlatformSpecificWindowBuilderAttributes,
+    },
+    window::{CursorIcon, Icon, WindowAttributes},
+};
 
-use super::{ffi, util, ImeSender, XConnection, XError, WindowId, EventLoopWindowTarget};
+use super::{ffi, util, EventLoopWindowTarget, ImeSender, WindowId, XConnection, XError};
 
 unsafe extern "C" fn visibility_predicate(
     _display: *mut ffi::Display,
@@ -89,7 +86,8 @@ impl UnownedWindow {
                 }
             }
             dpi_factor.unwrap_or_else(|| {
-                xconn.query_pointer(root, util::VIRTUAL_CORE_POINTER)
+                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);
@@ -110,17 +108,18 @@ impl UnownedWindow {
 
         info!("Guessed window DPI factor: {}", dpi_factor);
 
-        let max_inner_size: Option<(u32, u32)> = window_attrs.max_inner_size.map(|size| {
-            size.to_physical(dpi_factor).into()
-        });
-        let min_inner_size: Option<(u32, u32)> = window_attrs.min_inner_size.map(|size| {
-            size.to_physical(dpi_factor).into()
-        });
+        let max_inner_size: Option<(u32, u32)> = window_attrs
+            .max_inner_size
+            .map(|size| size.to_physical(dpi_factor).into());
+        let min_inner_size: Option<(u32, u32)> = window_attrs
+            .min_inner_size
+            .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: (u32, u32) = window_attrs.inner_size
+            let mut dimensions: (u32, u32) = window_attrs
+                .inner_size
                 .or_else(|| Some((800, 600).into()))
                 .map(|size| size.to_physical(dpi_factor))
                 .map(Into::into)
@@ -133,7 +132,10 @@ 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);
+            debug!(
+                "Calculated physical dimensions: {}x{}",
+                dimensions.0, dimensions.1
+            );
             dimensions
         };
 
@@ -150,7 +152,9 @@ impl UnownedWindow {
                     let visual = vi.visual;
                     (xconn.xlib.XCreateColormap)(xconn.display, root, visual, ffi::AllocNone)
                 }
-            } else { 0 };
+            } else {
+                0
+            };
             swa.event_mask = ffi::ExposureMask
                 | ffi::StructureNotifyMask
                 | ffi::VisibilityChangeMask
@@ -220,7 +224,9 @@ impl UnownedWindow {
         // title to determine placement/etc., so doing this after mapping would cause the WM to
         // act on the wrong title state.
         window.set_title_inner(&window_attrs.title).queue();
-        window.set_decorations_inner(window_attrs.decorations).queue();
+        window
+            .set_decorations_inner(window_attrs.decorations)
+            .queue();
 
         {
             // Enable drag and drop (TODO: extend API to make this toggleable)
@@ -234,15 +240,16 @@ impl UnownedWindow {
                     util::PropMode::Replace,
                     version,
                 )
-            }.queue();
+            }
+            .queue();
 
             // WM_CLASS must be set *before* mapping the window, as per ICCCM!
             {
                 let (class, instance) = if let Some((instance, class)) = pl_attribs.class {
                     let instance = CString::new(instance.as_str())
                         .expect("`WM_CLASS` instance contained null byte");
-                    let class = CString::new(class.as_str())
-                        .expect("`WM_CLASS` class contained null byte");
+                    let class =
+                        CString::new(class.as_str()).expect("`WM_CLASS` class contained null byte");
                     (instance, class)
                 } else {
                     let class = env::args()
@@ -269,12 +276,8 @@ impl UnownedWindow {
                 (*class_hint).res_class = instance.as_ptr() as *mut c_char;
 
                 unsafe {
-                    (xconn.xlib.XSetClassHint)(
-                        xconn.display,
-                        window.xwindow,
-                        class_hint.ptr,
-                    );
-                }//.queue();
+                    (xconn.xlib.XSetClassHint)(xconn.display, window.xwindow, class_hint.ptr);
+                } //.queue();
             }
 
             window.set_pid().map(|flusher| flusher.queue());
@@ -289,9 +292,11 @@ impl UnownedWindow {
 
             // set size hints
             {
-                let mut min_inner_size = window_attrs.min_inner_size
+                let mut min_inner_size = window_attrs
+                    .min_inner_size
                     .map(|size| size.to_physical(dpi_factor));
-                let mut max_inner_size = window_attrs.max_inner_size
+                let mut max_inner_size = window_attrs
+                    .max_inner_size
                     .map(|size| size.to_physical(dpi_factor));
                 if !window_attrs.resizable {
                     if util::wm_name_is_one_of(&["Xfwm4"]) {
@@ -328,13 +333,13 @@ impl UnownedWindow {
                     &event_loop.wm_delete_window as *const ffi::Atom as *mut ffi::Atom,
                     1,
                 );
-            }//.queue();
+            } //.queue();
 
             // Set visibility (map window)
             if window_attrs.visible {
                 unsafe {
                     (xconn.xlib.XMapRaised)(xconn.display, window.xwindow);
-                }//.queue();
+                } //.queue();
             }
 
             // Attempt to make keyboard input repeat detectable
@@ -346,7 +351,9 @@ impl UnownedWindow {
                     &mut supported_ptr,
                 );
                 if supported_ptr == ffi::False {
-                    return Err(os_error!(OsError::XMisc("`XkbSetDetectableAutoRepeat` failed")));
+                    return Err(os_error!(OsError::XMisc(
+                        "`XkbSetDetectableAutoRepeat` failed"
+                    )));
                 }
             }
 
@@ -366,16 +373,18 @@ impl UnownedWindow {
                     | ffi::XI_TouchEndMask;
                 mask
             };
-            xconn.select_xinput_events(window.xwindow, ffi::XIAllMasterDevices, mask).queue();
+            xconn
+                .select_xinput_events(window.xwindow, ffi::XIAllMasterDevices, mask)
+                .queue();
 
             {
-                let result = event_loop.ime
-                    .borrow_mut()
-                    .create_context(window.xwindow);
+                let result = event_loop.ime.borrow_mut().create_context(window.xwindow);
                 if let Err(err) = result {
                     let e = match err {
                         ImeContextCreationError::XError(err) => OsError::XError(err),
-                        ImeContextCreationError::Null => OsError::XMisc("IME Context creation failed"),
+                        ImeContextCreationError::Null => {
+                            OsError::XMisc("IME Context creation failed")
+                        },
                     };
                     return Err(os_error!(e));
                 }
@@ -386,10 +395,14 @@ impl UnownedWindow {
                 window.set_maximized_inner(window_attrs.maximized).queue();
             }
             if window_attrs.fullscreen.is_some() {
-                window.set_fullscreen_inner(window_attrs.fullscreen.clone()).queue();
+                window
+                    .set_fullscreen_inner(window_attrs.fullscreen.clone())
+                    .queue();
             }
             if window_attrs.always_on_top {
-                window.set_always_on_top_inner(window_attrs.always_on_top).queue();
+                window
+                    .set_always_on_top_inner(window_attrs.always_on_top)
+                    .queue();
             }
 
             if window_attrs.visible {
@@ -397,7 +410,8 @@ impl UnownedWindow {
                     // XSetInputFocus generates an error if the window is not visible, so we wait
                     // until we receive VisibilityNotify.
                     let mut event = mem::uninitialized();
-                    (xconn.xlib.XIfEvent)( // This will flush the request buffer IF it blocks.
+                    (xconn.xlib.XIfEvent)(
+                        // This will flush the request buffer IF it blocks.
                         xconn.display,
                         &mut event as *mut ffi::XEvent,
                         Some(visibility_predicate),
@@ -414,7 +428,8 @@ impl UnownedWindow {
         }
 
         // We never want to give the user a broken window, since by then, it's too late to handle.
-        xconn.sync_with_server()
+        xconn
+            .sync_with_server()
             .map(|_| window)
             .map_err(|x_err| os_error!(OsError::XError(x_err)))
     }
@@ -439,18 +454,22 @@ impl UnownedWindow {
                 const MAXHOSTNAMELEN: usize = 256;
                 let mut hostname: [c_char; MAXHOSTNAMELEN] = mem::uninitialized();
                 let status = libc::gethostname(hostname.as_mut_ptr(), hostname.len());
-                if status != 0 { return None; }
+                if status != 0 {
+                    return None;
+                }
                 hostname[MAXHOSTNAMELEN - 1] = '\0' as c_char; // a little extra safety
                 let hostname_length = libc::strlen(hostname.as_ptr());
                 (hostname, hostname_length as usize)
             };
-            self.xconn.change_property(
+            self.xconn
+                .change_property(
                     self.xwindow,
                     pid_atom,
                     ffi::XA_CARDINAL,
                     util::PropMode::Replace,
                     &[libc::getpid() as util::Cardinal],
-            ).queue();
+                )
+                .queue();
             let flusher = self.xconn.change_property(
                 self.xwindow,
                 client_machine_atom,
@@ -489,13 +508,19 @@ impl UnownedWindow {
 
     #[inline]
     pub fn set_urgent(&self, is_urgent: bool) {
-        let mut wm_hints = self.xconn.get_wm_hints(self.xwindow).expect("`XGetWMHints` failed");
+        let mut wm_hints = self
+            .xconn
+            .get_wm_hints(self.xwindow)
+            .expect("`XGetWMHints` failed");
         if is_urgent {
             (*wm_hints).flags |= ffi::XUrgencyHint;
         } else {
             (*wm_hints).flags &= !ffi::XUrgencyHint;
         }
-        self.xconn.set_wm_hints(self.xwindow, wm_hints).flush().expect("Failed to set urgency hint");
+        self.xconn
+            .set_wm_hints(self.xwindow, wm_hints)
+            .flush()
+            .expect("Failed to set urgency hint");
     }
 
     fn set_netwm(
@@ -520,7 +545,8 @@ impl UnownedWindow {
     }
 
     fn set_fullscreen_hint(&self, fullscreen: bool) -> util::Flusher<'_> {
-        let fullscreen_atom = unsafe { self.xconn.get_atom_unchecked(b"_NET_WM_STATE_FULLSCREEN\0") };
+        let fullscreen_atom =
+            unsafe { self.xconn.get_atom_unchecked(b"_NET_WM_STATE_FULLSCREEN\0") };
         self.set_netwm(fullscreen.into(), (fullscreen_atom as c_long, 0, 0, 0))
     }
 
@@ -533,13 +559,16 @@ impl UnownedWindow {
                 }
                 flusher
             },
-            Some(RootMonitorHandle { inner: PlatformMonitorHandle::X(monitor) }) => {
+            Some(RootMonitorHandle {
+                inner: PlatformMonitorHandle::X(monitor),
+            }) => {
                 let window_position = self.outer_position_physical();
                 self.shared_state.lock().restore_position = Some(window_position);
                 let monitor_origin: (i32, i32) = monitor.position().into();
-                self.set_position_inner(monitor_origin.0, monitor_origin.1).queue();
+                self.set_position_inner(monitor_origin.0, monitor_origin.1)
+                    .queue();
                 self.set_fullscreen_hint(true)
-            }
+            },
             _ => unreachable!(),
         }
     }
@@ -567,14 +596,12 @@ impl UnownedWindow {
 
     #[inline]
     pub fn current_monitor(&self) -> X11MonitorHandle {
-        let monitor = self.shared_state
-            .lock()
-            .last_monitor
-            .as_ref()
-            .cloned();
-        monitor
-            .unwrap_or_else(|| {
-                let monitor = self.xconn.get_monitor_for_window(Some(self.get_rect())).to_owned();
+        let monitor = self.shared_state.lock().last_monitor.as_ref().cloned();
+        monitor.unwrap_or_else(|| {
+            let monitor = self
+                .xconn
+                .get_monitor_for_window(Some(self.get_rect()))
+                .to_owned();
             self.shared_state.lock().last_monitor = Some(monitor.clone());
             monitor
         })
@@ -589,9 +616,18 @@ impl UnownedWindow {
     }
 
     fn set_maximized_inner(&self, maximized: bool) -> util::Flusher<'_> {
-        let horz_atom = unsafe { self.xconn.get_atom_unchecked(b"_NET_WM_STATE_MAXIMIZED_HORZ\0") };
-        let vert_atom = unsafe { self.xconn.get_atom_unchecked(b"_NET_WM_STATE_MAXIMIZED_VERT\0") };
-        self.set_netwm(maximized.into(), (horz_atom as c_long, vert_atom as c_long, 0, 0))
+        let horz_atom = unsafe {
+            self.xconn
+                .get_atom_unchecked(b"_NET_WM_STATE_MAXIMIZED_HORZ\0")
+        };
+        let vert_atom = unsafe {
+            self.xconn
+                .get_atom_unchecked(b"_NET_WM_STATE_MAXIMIZED_VERT\0")
+        };
+        self.set_netwm(
+            maximized.into(),
+            (horz_atom as c_long, vert_atom as c_long, 0, 0),
+        )
     }
 
     #[inline]
@@ -695,7 +731,9 @@ impl UnownedWindow {
         match icon {
             Some(icon) => self.set_icon_inner(icon),
             None => self.unset_icon_inner(),
-        }.flush().expect("Failed to set icons");
+        }
+        .flush()
+        .expect("Failed to set icons");
     }
 
     #[inline]
@@ -703,19 +741,23 @@ impl UnownedWindow {
         match visible {
             true => unsafe {
                 (self.xconn.xlib.XMapRaised)(self.xconn.display, self.xwindow);
-                self.xconn.flush_requests()
+                self.xconn
+                    .flush_requests()
                     .expect("Failed to call XMapRaised");
             },
             false => unsafe {
                 (self.xconn.xlib.XUnmapWindow)(self.xconn.display, self.xwindow);
-                self.xconn.flush_requests()
+                self.xconn
+                    .flush_requests()
                     .expect("Failed to call XUnmapWindow");
-            }
+            },
         }
     }
 
     fn update_cached_frame_extents(&self) {
-        let extents = self.xconn.get_frame_extents_heuristic(self.xwindow, self.root);
+        let extents = self
+            .xconn
+            .get_frame_extents_heuristic(self.xwindow, self.root);
         (*self.shared_state.lock()).frame_extents = Some(extents);
     }
 
@@ -749,7 +791,8 @@ impl UnownedWindow {
     pub(crate) fn inner_position_physical(&self) -> (i32, i32) {
         // This should be okay to unwrap since the only error XTranslateCoordinates can return
         // is BadWindow, and if the window handle is bad we have bigger problems.
-        self.xconn.translate_coords(self.xwindow, self.root)
+        self.xconn
+            .translate_coords(self.xwindow, self.root)
             .map(|coords| (coords.x_rel_root, coords.y_rel_root))
             .unwrap()
     }
@@ -773,12 +816,7 @@ impl UnownedWindow {
             }
         }
         unsafe {
-            (self.xconn.xlib.XMoveWindow)(
-                self.xconn.display,
-                self.xwindow,
-                x as c_int,
-                y as c_int,
-            );
+            (self.xconn.xlib.XMoveWindow)(self.xconn.display, self.xwindow, x as c_int, y as c_int);
         }
         util::Flusher::new(&self.xconn)
     }
@@ -798,7 +836,8 @@ impl UnownedWindow {
     pub(crate) fn inner_size_physical(&self) -> (u32, u32) {
         // This should be okay to unwrap since the only error XGetGeometry can return
         // is BadWindow, and if the window handle is bad we have bigger problems.
-        self.xconn.get_geometry(self.xwindow)
+        self.xconn
+            .get_geometry(self.xwindow)
             .map(|geo| (geo.width, geo.height))
             .unwrap()
     }
@@ -840,7 +879,8 @@ impl UnownedWindow {
                 height as c_uint,
             );
             self.xconn.flush_requests()
-        }.expect("Failed to call `XResizeWindow`");
+        }
+        .expect("Failed to call `XResizeWindow`");
     }
 
     #[inline]
@@ -851,11 +891,14 @@ impl UnownedWindow {
     }
 
     fn update_normal_hints<F>(&self, callback: F) -> Result<(), XError>
-        where F: FnOnce(&mut util::NormalHints<'_>) -> ()
+    where
+        F: FnOnce(&mut util::NormalHints<'_>) -> (),
     {
         let mut normal_hints = self.xconn.get_normal_hints(self.xwindow)?;
         callback(&mut normal_hints);
-        self.xconn.set_normal_hints(self.xwindow, normal_hints).flush()
+        self.xconn
+            .set_normal_hints(self.xwindow, normal_hints)
+            .flush()
     }
 
     pub(crate) fn set_min_inner_size_physical(&self, dimensions: Option<(u32, u32)>) {
@@ -866,9 +909,8 @@ impl UnownedWindow {
     #[inline]
     pub fn set_min_inner_size(&self, logical_dimensions: Option<LogicalSize>) {
         self.shared_state.lock().min_inner_size = logical_dimensions;
-        let physical_dimensions = logical_dimensions.map(|logical_dimensions| {
-            logical_dimensions.to_physical(self.hidpi_factor()).into()
-        });
+        let physical_dimensions = logical_dimensions
+            .map(|logical_dimensions| logical_dimensions.to_physical(self.hidpi_factor()).into());
         self.set_min_inner_size_physical(physical_dimensions);
     }
 
@@ -880,9 +922,8 @@ impl UnownedWindow {
     #[inline]
     pub fn set_max_inner_size(&self, logical_dimensions: Option<LogicalSize>) {
         self.shared_state.lock().max_inner_size = logical_dimensions;
-        let physical_dimensions = logical_dimensions.map(|logical_dimensions| {
-            logical_dimensions.to_physical(self.hidpi_factor()).into()
-        });
+        let physical_dimensions = logical_dimensions
+            .map(|logical_dimensions| logical_dimensions.to_physical(self.hidpi_factor()).into());
         self.set_max_inner_size_physical(physical_dimensions);
     }
 
@@ -910,7 +951,8 @@ impl UnownedWindow {
             normal_hints.set_min_size(min_size);
             normal_hints.set_resize_increments(resize_increments);
             normal_hints.set_base_size(base_size);
-        }).expect("Failed to update normal hints");
+        })
+        .expect("Failed to update normal hints");
         unsafe {
             (self.xconn.xlib.XResizeWindow)(
                 self.xconn.display,
@@ -933,7 +975,10 @@ impl UnownedWindow {
 
         let (logical_min, logical_max) = if resizable {
             let shared_state_lock = self.shared_state.lock();
-            (shared_state_lock.min_inner_size, shared_state_lock.max_inner_size)
+            (
+                shared_state_lock.min_inner_size,
+                shared_state_lock.max_inner_size,
+            )
         } else {
             let window_size = Some(self.inner_size());
             (window_size.clone(), window_size)
@@ -949,7 +994,8 @@ impl UnownedWindow {
         self.update_normal_hints(|normal_hints| {
             normal_hints.set_min_size(min_inner_size);
             normal_hints.set_max_size(max_inner_size);
-        }).expect("Failed to call `XSetWMNormalHints`");
+        })
+        .expect("Failed to call `XSetWMNormalHints`");
     }
 
     #[inline]
@@ -974,9 +1020,7 @@ impl UnownedWindow {
 
     #[inline]
     pub fn xcb_connection(&self) -> *mut c_void {
-        unsafe {
-            (self.xconn.xlib_xcb.XGetXCBConnection)(self.xconn.display) as *mut _
-        }
+        unsafe { (self.xconn.xlib_xcb.XGetXCBConnection)(self.xconn.display) as *mut _ }
     }
 
     fn load_cursor(&self, name: &[u8]) -> ffi::Cursor {
@@ -999,13 +1043,9 @@ impl UnownedWindow {
     }
 
     fn get_cursor(&self, cursor: CursorIcon) -> ffi::Cursor {
-        let load = |name: &[u8]| {
-            self.load_cursor(name)
-        };
+        let load = |name: &[u8]| self.load_cursor(name);
 
-        let loadn = |names: &[&[u8]]| {
-            self.load_first_existing_cursor(names)
-        };
+        let loadn = |names: &[&[u8]]| self.load_first_existing_cursor(names);
 
         // Try multiple names in some cases where the name
         // differs on the desktop environments or themes.
@@ -1030,7 +1070,6 @@ impl UnownedWindow {
             CursorIcon::NoDrop => loadn(&[b"no-drop\0", b"circle\0"]),
             CursorIcon::NotAllowed => load(b"crossed_circle\0"),
 
-
             // Resize cursors
             CursorIcon::EResize => load(b"right_side\0"),
             CursorIcon::NResize => load(b"top_side\0"),
@@ -1063,7 +1102,9 @@ impl UnownedWindow {
             if cursor != 0 {
                 (self.xconn.xlib.XFreeCursor)(self.xconn.display, cursor);
             }
-            self.xconn.flush_requests().expect("Failed to set or free the cursor");
+            self.xconn
+                .flush_requests()
+                .expect("Failed to set or free the cursor");
         }
     }
 
@@ -1081,13 +1122,7 @@ impl UnownedWindow {
     fn create_empty_cursor(&self) -> Option<ffi::Cursor> {
         let data = 0;
         let pixmap = unsafe {
-            (self.xconn.xlib.XCreateBitmapFromData)(
-                self.xconn.display,
-                self.xwindow,
-                &data,
-                1,
-                1,
-            )
+            (self.xconn.xlib.XCreateBitmapFromData)(self.xconn.display, self.xwindow, &data, 1, 1)
         };
         if pixmap == 0 {
             // Failed to allocate
@@ -1116,7 +1151,9 @@ impl UnownedWindow {
     #[inline]
     pub fn set_cursor_grab(&self, grab: bool) -> Result<(), ExternalError> {
         let mut grabbed_lock = self.cursor_grabbed.lock();
-        if grab == *grabbed_lock { return Ok(()); }
+        if grab == *grabbed_lock {
+            return Ok(());
+        }
         unsafe {
             // We ungrab before grabbing to prevent passive grabs from causing `AlreadyGrabbed`.
             // Therefore, this is common to both codepaths.
@@ -1128,8 +1165,7 @@ impl UnownedWindow {
                     self.xconn.display,
                     self.xwindow,
                     ffi::True,
-                    (
-                        ffi::ButtonPressMask
+                    (ffi::ButtonPressMask
                         | ffi::ButtonReleaseMask
                         | ffi::EnterWindowMask
                         | ffi::LeaveWindowMask
@@ -1141,8 +1177,7 @@ impl UnownedWindow {
                         | ffi::Button4MotionMask
                         | ffi::Button5MotionMask
                         | ffi::ButtonMotionMask
-                        | ffi::KeymapStateMask
-                    ) as c_uint,
+                        | ffi::KeymapStateMask) as c_uint,
                     ffi::GrabModeAsync,
                     ffi::GrabModeAsync,
                     self.xwindow,
@@ -1153,14 +1188,20 @@ impl UnownedWindow {
 
             match result {
                 ffi::GrabSuccess => Ok(()),
-                ffi::AlreadyGrabbed => Err("Cursor could not be grabbed: already grabbed by another client"),
+                ffi::AlreadyGrabbed => {
+                    Err("Cursor could not be grabbed: already grabbed by another client")
+                },
                 ffi::GrabInvalidTime => Err("Cursor could not be grabbed: invalid time"),
-                ffi::GrabNotViewable => Err("Cursor could not be grabbed: grab location not viewable"),
+                ffi::GrabNotViewable => {
+                    Err("Cursor could not be grabbed: grab location not viewable")
+                },
                 ffi::GrabFrozen => Err("Cursor could not be grabbed: frozen by another client"),
                 _ => unreachable!(),
-            }.map_err(|err| ExternalError::Os(os_error!(OsError::XMisc(err))))
+            }
+            .map_err(|err| ExternalError::Os(os_error!(OsError::XMisc(err))))
         } else {
-            self.xconn.flush_requests()
+            self.xconn
+                .flush_requests()
                 .map_err(|err| ExternalError::Os(os_error!(OsError::XError(err))))
         };
         if result.is_ok() {
@@ -1172,11 +1213,14 @@ impl UnownedWindow {
     #[inline]
     pub fn set_cursor_visible(&self, visible: bool) {
         let mut visible_lock = self.cursor_visible.lock();
-        if visible == *visible_lock {return; }
+        if visible == *visible_lock {
+            return;
+        }
         let cursor = if visible {
             self.get_cursor(*self.cursor.lock())
         } else {
-            self.create_empty_cursor().expect("Failed to create empty cursor")
+            self.create_empty_cursor()
+                .expect("Failed to create empty cursor")
         };
         *visible_lock = visible;
         drop(visible_lock);
@@ -1190,29 +1234,25 @@ impl UnownedWindow {
 
     pub fn set_cursor_position_physical(&self, x: i32, y: i32) -> Result<(), ExternalError> {
         unsafe {
-            (self.xconn.xlib.XWarpPointer)(
-                self.xconn.display,
-                0,
-                self.xwindow,
-                0,
-                0,
-                0,
-                0,
-                x,
-                y,
-            );
-            self.xconn.flush_requests().map_err(|e| ExternalError::Os(os_error!(OsError::XError(e))))
+            (self.xconn.xlib.XWarpPointer)(self.xconn.display, 0, self.xwindow, 0, 0, 0, 0, x, y);
+            self.xconn
+                .flush_requests()
+                .map_err(|e| ExternalError::Os(os_error!(OsError::XError(e))))
         }
     }
 
     #[inline]
-    pub fn set_cursor_position(&self, logical_position: LogicalPosition) -> Result<(), ExternalError> {
+    pub fn set_cursor_position(
+        &self,
+        logical_position: LogicalPosition,
+    ) -> Result<(), ExternalError> {
         let (x, y) = logical_position.to_physical(self.hidpi_factor()).into();
         self.set_cursor_position_physical(x, y)
     }
 
     pub(crate) fn set_ime_position_physical(&self, x: i32, y: i32) {
-        let _ = self.ime_sender
+        let _ = self
+            .ime_sender
             .lock()
             .send((self.xwindow, x as i16, y as i16));
     }
@@ -1224,10 +1264,15 @@ impl UnownedWindow {
     }
 
     #[inline]
-    pub fn id(&self) -> WindowId { WindowId(self.xwindow) }
+    pub fn id(&self) -> WindowId {
+        WindowId(self.xwindow)
+    }
 
     #[inline]
     pub fn request_redraw(&self) {
-        self.pending_redraws.lock().unwrap().insert(WindowId(self.xwindow));
+        self.pending_redraws
+            .lock()
+            .unwrap()
+            .insert(WindowId(self.xwindow));
     }
 }

src/platform_impl/linux/x11/xdisplay.rs

@@ -1,7 +1,4 @@
-use std::ptr;
-use std::fmt;
-use std::error::Error;
-use std::os::raw::c_int;
+use std::{error::Error, fmt, os::raw::c_int, ptr};
 
 use libc;
 use parking_lot::Mutex;
@@ -27,7 +24,8 @@ pub struct XConnection {
 unsafe impl Send for XConnection {}
 unsafe impl Sync for XConnection {}
 
-pub type XErrorHandler = Option<unsafe extern fn(*mut ffi::Display, *mut ffi::XErrorEvent) -> libc::c_int>;
+pub type XErrorHandler =
+    Option<unsafe extern "C" fn(*mut ffi::Display, *mut ffi::XErrorEvent) -> libc::c_int>;
 
 impl XConnection {
     pub fn new(error_handler: XErrorHandler) -> Result<XConnection, XNotSupported> {
@@ -53,9 +51,7 @@ impl XConnection {
         };
 
         // Get X11 socket file descriptor
-        let fd = unsafe {
-            (xlib.XConnectionNumber)(display)
-        };
+        let fd = unsafe { (xlib.XConnectionNumber)(display) };
 
         Ok(XConnection {
             xlib,
@@ -120,8 +116,11 @@ impl Error for XError {
 
 impl fmt::Display for XError {
     fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
-        write!(formatter, "X error: {} (code: {}, request code: {}, minor code: {})",
-               self.description, self.error_code, self.request_code, self.minor_code)
+        write!(
+            formatter,
+            "X error: {} (code: {}, request code: {}, minor code: {})",
+            self.description, self.error_code, self.request_code, self.minor_code
+        )
     }
 }
 
@@ -154,7 +153,7 @@ impl Error for XNotSupported {
     fn cause(&self) -> Option<&dyn Error> {
         match *self {
             XNotSupported::LibraryOpenError(ref err) => Some(err),
-            _ => None
+            _ => None,
         }
     }
 }

src/platform_impl/macos/app.rs

@@ -1,10 +1,18 @@
 use std::collections::VecDeque;
 
-use cocoa::{appkit::{self, NSEvent}, base::id};
-use objc::{declare::ClassDecl, runtime::{Class, Object, Sel}};
+use cocoa::{
+    appkit::{self, NSEvent},
+    base::id,
+};
+use objc::{
+    declare::ClassDecl,
+    runtime::{Class, Object, Sel},
+};
 
-use crate::event::{DeviceEvent, Event};
-use crate::platform_impl::platform::{app_state::AppState, DEVICE_ID, util};
+use crate::{
+    event::{DeviceEvent, Event},
+    platform_impl::platform::{app_state::AppState, util, DEVICE_ID},
+};
 
 pub struct AppClass(pub *const Class);
 unsafe impl Send for AppClass {}
@@ -17,7 +25,7 @@ lazy_static! {
 
         decl.add_method(
             sel!(sendEvent:),
-            send_event as extern fn(&Object, Sel, id),
+            send_event as extern "C" fn(&Object, Sel, id),
         );
 
         AppClass(decl.register())
@@ -27,23 +35,25 @@ lazy_static! {
 // Normally, holding Cmd + any key never sends us a `keyUp` event for that key.
 // Overriding `sendEvent:` like this fixes that. (https://stackoverflow.com/a/15294196)
 // Fun fact: Firefox still has this bug! (https://bugzilla.mozilla.org/show_bug.cgi?id=1299553)
-extern fn send_event(this: &Object, _sel: Sel, event: id) {
+extern "C" fn send_event(this: &Object, _sel: Sel, event: id) {
     unsafe {
         // For posterity, there are some undocumented event types
         // (https://github.com/servo/cocoa-rs/issues/155)
         // but that doesn't really matter here.
         let event_type = event.eventType();
         let modifier_flags = event.modifierFlags();
-        if event_type == appkit::NSKeyUp && util::has_flag(
+        if event_type == appkit::NSKeyUp
+            && util::has_flag(
                 modifier_flags,
                 appkit::NSEventModifierFlags::NSCommandKeyMask,
-        ) {
+            )
+        {
             let key_window: id = msg_send![this, keyWindow];
-            let _: () = msg_send![key_window, sendEvent:event];
+            let _: () = msg_send![key_window, sendEvent: event];
         } else {
             maybe_dispatch_device_event(event);
             let superclass = util::superclass(this);
-            let _: () = msg_send![super(this, superclass), sendEvent:event];
+            let _: () = msg_send![super(this, superclass), sendEvent: event];
         }
     }
 }
@@ -51,10 +61,10 @@ extern fn send_event(this: &Object, _sel: Sel, event: id) {
 unsafe fn maybe_dispatch_device_event(event: id) {
     let event_type = event.eventType();
     match event_type {
-        appkit::NSMouseMoved |
-        appkit::NSLeftMouseDragged |
-        appkit::NSOtherMouseDragged |
-        appkit::NSRightMouseDragged => {
+        appkit::NSMouseMoved
+        | appkit::NSLeftMouseDragged
+        | appkit::NSOtherMouseDragged
+        | appkit::NSRightMouseDragged => {
             let mut events = VecDeque::with_capacity(3);
 
             let delta_x = event.deltaX() as f64;
@@ -63,21 +73,29 @@ unsafe fn maybe_dispatch_device_event(event: id) {
             if delta_x != 0.0 {
                 events.push_back(Event::DeviceEvent {
                     device_id: DEVICE_ID,
-                    event: DeviceEvent::Motion { axis: 0, value: delta_x },
+                    event: DeviceEvent::Motion {
+                        axis: 0,
+                        value: delta_x,
+                    },
                 });
             }
 
             if delta_y != 0.0 {
                 events.push_back(Event::DeviceEvent {
                     device_id: DEVICE_ID,
-                    event: DeviceEvent::Motion { axis: 1, value: delta_y },
+                    event: DeviceEvent::Motion {
+                        axis: 1,
+                        value: delta_y,
+                    },
                 });
             }
 
             if delta_x != 0.0 || delta_y != 0.0 {
                 events.push_back(Event::DeviceEvent {
                     device_id: DEVICE_ID,
-                    event: DeviceEvent::MouseMotion { delta: (delta_x, delta_y) },
+                    event: DeviceEvent::MouseMotion {
+                        delta: (delta_x, delta_y),
+                    },
                 });
             }
 

src/platform_impl/macos/app_delegate.rs

@@ -1,5 +1,8 @@
 use cocoa::base::id;
-use objc::{runtime::{Class, Object, Sel, BOOL, YES}, declare::ClassDecl};
+use objc::{
+    declare::ClassDecl,
+    runtime::{Class, Object, Sel, BOOL, YES},
+};
 
 use crate::platform_impl::platform::app_state::AppState;
 
@@ -14,41 +17,41 @@ lazy_static! {
 
         decl.add_method(
             sel!(applicationDidFinishLaunching:),
-            did_finish_launching as extern fn(&Object, Sel, id) -> BOOL,
+            did_finish_launching as extern "C" fn(&Object, Sel, id) -> BOOL,
         );
         decl.add_method(
             sel!(applicationDidBecomeActive:),
-            did_become_active as extern fn(&Object, Sel, id),
+            did_become_active as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(applicationWillResignActive:),
-            will_resign_active as extern fn(&Object, Sel, id),
+            will_resign_active as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(applicationWillEnterForeground:),
-            will_enter_foreground as extern fn(&Object, Sel, id),
+            will_enter_foreground as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(applicationDidEnterBackground:),
-            did_enter_background as extern fn(&Object, Sel, id),
+            did_enter_background as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(applicationWillTerminate:),
-            will_terminate as extern fn(&Object, Sel, id),
+            will_terminate as extern "C" fn(&Object, Sel, id),
         );
 
         AppDelegateClass(decl.register())
     };
 }
 
-extern fn did_finish_launching(_: &Object, _: Sel, _: id) -> BOOL {
+extern "C" fn did_finish_launching(_: &Object, _: Sel, _: id) -> BOOL {
     trace!("Triggered `didFinishLaunching`");
     AppState::launched();
     trace!("Completed `didFinishLaunching`");
     YES
 }
 
-extern fn did_become_active(_: &Object, _: Sel, _: id) {
+extern "C" fn did_become_active(_: &Object, _: Sel, _: id) {
     trace!("Triggered `didBecomeActive`");
     /*unsafe {
         HANDLER.lock().unwrap().handle_nonuser_event(Event::Suspended(false))
@@ -56,7 +59,7 @@ extern fn did_become_active(_: &Object, _: Sel, _: id) {
     trace!("Completed `didBecomeActive`");
 }
 
-extern fn will_resign_active(_: &Object, _: Sel, _: id) {
+extern "C" fn will_resign_active(_: &Object, _: Sel, _: id) {
     trace!("Triggered `willResignActive`");
     /*unsafe {
         HANDLER.lock().unwrap().handle_nonuser_event(Event::Suspended(true))
@@ -64,17 +67,17 @@ extern fn will_resign_active(_: &Object, _: Sel, _: id) {
     trace!("Completed `willResignActive`");
 }
 
-extern fn will_enter_foreground(_: &Object, _: Sel, _: id) {
+extern "C" fn will_enter_foreground(_: &Object, _: Sel, _: id) {
     trace!("Triggered `willEnterForeground`");
     trace!("Completed `willEnterForeground`");
 }
 
-extern fn did_enter_background(_: &Object, _: Sel, _: id) {
+extern "C" fn did_enter_background(_: &Object, _: Sel, _: id) {
     trace!("Triggered `didEnterBackground`");
     trace!("Completed `didEnterBackground`");
 }
 
-extern fn will_terminate(_: &Object, _: Sel, _: id) {
+extern "C" fn will_terminate(_: &Object, _: Sel, _: id) {
     trace!("Triggered `willTerminate`");
     /*unsafe {
         let app: id = msg_send![class!(UIApplication), sharedApplication];

src/platform_impl/macos/app_state.rs

@@ -1,7 +1,13 @@
 use std::{
-    collections::VecDeque, fmt::{self, Debug},
-    hint::unreachable_unchecked, mem,
-    sync::{atomic::{AtomicBool, Ordering}, Mutex, MutexGuard}, time::Instant,
+    collections::VecDeque,
+    fmt::{self, Debug},
+    hint::unreachable_unchecked,
+    mem,
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        Mutex, MutexGuard,
+    },
+    time::Instant,
 };
 
 use cocoa::{appkit::NSApp, base::nil};
@@ -9,9 +15,9 @@ use cocoa::{appkit::NSApp, base::nil};
 use crate::{
     event::{Event, StartCause, WindowEvent},
     event_loop::{ControlFlow, EventLoopWindowTarget as RootWindowTarget},
+    platform_impl::platform::{observer::EventLoopWaker, util::Never},
     window::WindowId,
 };
-use crate::platform_impl::platform::{observer::EventLoopWaker, util::Never};
 
 lazy_static! {
     static ref HANDLER: Handler = Default::default();
@@ -39,7 +45,8 @@ struct EventLoopHandler<F, T: 'static> {
 
 impl<F, T> Debug for EventLoopHandler<F, T> {
     fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
-        formatter.debug_struct("EventLoopHandler")
+        formatter
+            .debug_struct("EventLoopHandler")
             .field("window_target", &self.window_target)
             .finish()
     }
@@ -51,11 +58,7 @@ where
     T: 'static,
 {
     fn handle_nonuser_event(&mut self, event: Event<Never>, control_flow: &mut ControlFlow) {
-        (self.callback)(
-            event.userify(),
-            &self.window_target,
-            control_flow,
-        );
+        (self.callback)(event.userify(), &self.window_target, control_flow);
         self.will_exit |= *control_flow == ControlFlow::Exit;
         if self.will_exit {
             *control_flow = ControlFlow::Exit;
@@ -65,11 +68,7 @@ where
     fn handle_user_events(&mut self, control_flow: &mut ControlFlow) {
         let mut will_exit = self.will_exit;
         for event in self.window_target.p.receiver.try_iter() {
-            (self.callback)(
-                Event::UserEvent(event),
-                &self.window_target,
-                control_flow,
-            );
+            (self.callback)(Event::UserEvent(event), &self.window_target, control_flow);
             will_exit |= *control_flow == ControlFlow::Exit;
             if will_exit {
                 *control_flow = ControlFlow::Exit;
@@ -167,18 +166,13 @@ impl Handler {
 
     fn handle_nonuser_event(&self, event: Event<Never>) {
         if let Some(ref mut callback) = *self.callback.lock().unwrap() {
-            callback.handle_nonuser_event(
-                event,
-                &mut *self.control_flow.lock().unwrap(),
-            );
+            callback.handle_nonuser_event(event, &mut *self.control_flow.lock().unwrap());
         }
     }
 
     fn handle_user_events(&self) {
         if let Some(ref mut callback) = *self.callback.lock().unwrap() {
-            callback.handle_user_events(
-                &mut *self.control_flow.lock().unwrap(),
-            );
+            callback.handle_user_events(&mut *self.control_flow.lock().unwrap());
         }
     }
 }
@@ -213,13 +207,17 @@ impl AppState {
     }
 
     pub fn wakeup() {
-        if !HANDLER.is_ready() { return }
+        if !HANDLER.is_ready() {
+            return;
+        }
         let start = HANDLER.get_start_time().unwrap();
         let cause = match HANDLER.get_control_flow_and_update_prev() {
             ControlFlow::Poll => StartCause::Poll,
-            ControlFlow::Wait => StartCause::WaitCancelled {
+            ControlFlow::Wait => {
+                StartCause::WaitCancelled {
                     start,
                     requested_resume: None,
+                }
             },
             ControlFlow::WaitUntil(requested_resume) => {
                 if Instant::now() >= requested_resume {
@@ -234,7 +232,7 @@ impl AppState {
                     }
                 }
             },
-            ControlFlow::Exit => StartCause::Poll,//panic!("unexpected `ControlFlow::Exit`"),
+            ControlFlow::Exit => StartCause::Poll, //panic!("unexpected `ControlFlow::Exit`"),
         };
         HANDLER.set_in_callback(true);
         HANDLER.handle_nonuser_event(Event::NewEvents(cause));
@@ -278,7 +276,9 @@ impl AppState {
     }
 
     pub fn cleared() {
-        if !HANDLER.is_ready() { return }
+        if !HANDLER.is_ready() {
+            return;
+        }
         if !HANDLER.get_in_callback() {
             HANDLER.set_in_callback(true);
             HANDLER.handle_user_events();
@@ -295,8 +295,8 @@ impl AppState {
             HANDLER.set_in_callback(false);
         }
         if HANDLER.should_exit() {
-            let _: () = unsafe { msg_send![NSApp(), stop:nil] };
-            return
+            let _: () = unsafe { msg_send![NSApp(), stop: nil] };
+            return;
         }
         HANDLER.update_start_time();
         match HANDLER.get_old_and_new_control_flow() {

src/platform_impl/macos/event.rs

@@ -1,12 +1,14 @@
 use std::os::raw::c_ushort;
 
-use cocoa::{appkit::{NSEvent, NSEventModifierFlags}, base::id};
-
-use crate::event::{
-    ElementState, KeyboardInput,
-    ModifiersState, VirtualKeyCode, WindowEvent,
+use cocoa::{
+    appkit::{NSEvent, NSEventModifierFlags},
+    base::id,
+};
+
+use crate::{
+    event::{ElementState, KeyboardInput, ModifiersState, VirtualKeyCode, WindowEvent},
+    platform_impl::platform::DEVICE_ID,
 };
-use crate::platform_impl::platform::DEVICE_ID;
 
 pub fn char_to_keycode(c: char) -> Option<VirtualKeyCode> {
     // We only translate keys that are affected by keyboard layout.
@@ -57,9 +59,9 @@ pub fn char_to_keycode(c: char) -> Option<VirtualKeyCode> {
         '-' | '_' => VirtualKeyCode::Minus,
         ']' | '}' => VirtualKeyCode::RBracket,
         '[' | '{' => VirtualKeyCode::LBracket,
-        '\''| '"' => VirtualKeyCode::Apostrophe,
+        '\'' | '"' => VirtualKeyCode::Apostrophe,
         ';' | ':' => VirtualKeyCode::Semicolon,
-        '\\'| '|' => VirtualKeyCode::Backslash,
+        '\\' | '|' => VirtualKeyCode::Backslash,
         ',' | '<' => VirtualKeyCode::Comma,
         '/' | '?' => VirtualKeyCode::Slash,
         '.' | '>' => VirtualKeyCode::Period,
@@ -198,7 +200,6 @@ pub fn scancode_to_keycode(scancode: c_ushort) -> Option<VirtualKeyCode> {
         0x7d => VirtualKeyCode::Down,
         0x7e => VirtualKeyCode::Up,
         //0x7f =>  unkown,
-
         0xa => VirtualKeyCode::Caret,
         _ => return None,
     })
@@ -215,16 +216,14 @@ pub fn check_function_keys(string: &String) -> Option<VirtualKeyCode> {
             0xf71a => VirtualKeyCode::F23,
             0xf71b => VirtualKeyCode::F24,
             _ => return None,
-        })
+        });
     }
 
     None
 }
 
 pub fn event_mods(event: id) -> ModifiersState {
-    let flags = unsafe {
-        NSEvent::modifierFlags(event)
-    };
+    let flags = unsafe { NSEvent::modifierFlags(event) };
     ModifiersState {
         shift: flags.contains(NSEventModifierFlags::NSShiftKeyMask),
         ctrl: flags.contains(NSEventModifierFlags::NSControlKeyMask),
@@ -238,9 +237,7 @@ pub fn get_scancode(event: cocoa::base::id) -> c_ushort {
     // 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 { msg_send![event, keyCode] }
 }
 
 pub unsafe fn modifier_event(
@@ -249,7 +246,8 @@ pub unsafe fn modifier_event(
     was_key_pressed: bool,
 ) -> Option<WindowEvent> {
     if !was_key_pressed && NSEvent::modifierFlags(ns_event).contains(keymask)
-    || 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 {

src/platform_impl/macos/event_loop.rs

@@ -1,17 +1,24 @@
 use std::{
-    collections::VecDeque, mem, os::raw::c_void, process, ptr, sync::mpsc, marker::PhantomData
+    collections::VecDeque, marker::PhantomData, mem, os::raw::c_void, process, ptr, sync::mpsc,
 };
 
-use cocoa::{appkit::NSApp, base::{id, nil}, foundation::NSAutoreleasePool};
+use cocoa::{
+    appkit::NSApp,
+    base::{id, nil},
+    foundation::NSAutoreleasePool,
+};
 
 use crate::{
     event::Event,
     event_loop::{ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootWindowTarget},
-};
-use crate::platform_impl::platform::{
-    app::APP_CLASS, app_delegate::APP_DELEGATE_CLASS,
-    app_state::AppState, monitor::{self, MonitorHandle},
-    observer::*, util::IdRef,
+    platform_impl::platform::{
+        app::APP_CLASS,
+        app_delegate::APP_DELEGATE_CLASS,
+        app_state::AppState,
+        monitor::{self, MonitorHandle},
+        observer::*,
+        util::IdRef,
+    },
 };
 
 pub struct EventLoopWindowTarget<T: 'static> {
@@ -75,7 +82,8 @@ impl<T> EventLoop<T> {
     }
 
     pub fn run<F>(self, callback: F) -> !
-        where F: 'static + FnMut(Event<T>, &RootWindowTarget<T>, &mut ControlFlow),
+    where
+        F: 'static + FnMut(Event<T>, &RootWindowTarget<T>, &mut ControlFlow),
     {
         unsafe {
             let _pool = NSAutoreleasePool::new(nil);
@@ -89,7 +97,8 @@ impl<T> EventLoop<T> {
     }
 
     pub fn run_return<F>(&mut self, _callback: F)
-        where F: FnMut(Event<T>, &RootWindowTarget<T>, &mut ControlFlow),
+    where
+        F: FnMut(Event<T>, &RootWindowTarget<T>, &mut ControlFlow),
     {
         unimplemented!();
     }
@@ -119,11 +128,8 @@ impl<T> Proxy<T> {
             let rl = CFRunLoopGetMain();
             let mut context: CFRunLoopSourceContext = mem::zeroed();
             context.perform = event_loop_proxy_handler;
-            let source = CFRunLoopSourceCreate(
-                ptr::null_mut(),
-                CFIndex::max_value() - 1,
-                &mut context,
-            );
+            let source =
+                CFRunLoopSourceCreate(ptr::null_mut(), CFIndex::max_value() - 1, &mut context);
             CFRunLoopAddSource(rl, source, kCFRunLoopCommonModes);
             CFRunLoopWakeUp(rl);
 

src/platform_impl/macos/ffi.rs

@@ -2,8 +2,10 @@
 
 #![allow(dead_code, non_snake_case, non_upper_case_globals)]
 
-use cocoa::base::id;
-use cocoa::foundation::{NSInteger, NSUInteger};
+use cocoa::{
+    base::id,
+    foundation::{NSInteger, NSUInteger},
+};
 use objc;
 
 pub const NSNotFound: NSInteger = NSInteger::max_value();
@@ -53,11 +55,11 @@ impl NSMutableAttributedString for id {
     }
 
     unsafe fn initWithString(self, string: id) -> id {
-        msg_send![self, initWithString:string]
+        msg_send![self, initWithString: string]
     }
 
     unsafe fn initWithAttributedString(self, string: id) -> id {
-        msg_send![self, initWithAttributedString:string]
+        msg_send![self, initWithAttributedString: string]
     }
 
     unsafe fn string(self) -> id {

src/platform_impl/macos/mod.rs

@@ -15,16 +15,13 @@ mod window_delegate;
 
 use std::{fmt, ops::Deref, sync::Arc};
 
-use crate::{
-    event::DeviceId as RootDeviceId, window::WindowAttributes,
-    error::OsError as RootOsError,
-};
 pub use self::{
     event_loop::{EventLoop, EventLoopWindowTarget, Proxy as EventLoopProxy},
     monitor::MonitorHandle,
-    window::{
-        Id as WindowId, PlatformSpecificWindowBuilderAttributes, UnownedWindow,
-    },
+    window::{Id as WindowId, PlatformSpecificWindowBuilderAttributes, UnownedWindow},
+};
+use crate::{
+    error::OsError as RootOsError, event::DeviceId as RootDeviceId, window::WindowAttributes,
 };
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -48,7 +45,7 @@ pub struct Window {
 #[derive(Debug)]
 pub enum OsError {
     CGError(core_graphics::base::CGError),
-    CreationError(&'static str)
+    CreationError(&'static str),
 }
 
 unsafe impl Send for Window {}

src/platform_impl/macos/monitor.rs

@@ -11,9 +11,11 @@ use core_video_sys::{
     CVDisplayLinkGetNominalOutputVideoRefreshPeriod, CVDisplayLinkRelease,
 };
 
-use crate::dpi::{PhysicalPosition, PhysicalSize};
-use crate::monitor::VideoMode;
-use crate::platform_impl::platform::util::IdRef;
+use crate::{
+    dpi::{PhysicalPosition, PhysicalSize},
+    monitor::VideoMode,
+    platform_impl::platform::util::IdRef,
+};
 
 #[derive(Clone, PartialEq)]
 pub struct MonitorHandle(CGDirectDisplayID);
@@ -79,10 +81,7 @@ impl MonitorHandle {
         let display = CGDisplay::new(display_id);
         let height = display.pixels_high();
         let width = display.pixels_wide();
-        PhysicalSize::from_logical(
-            (width as f64, height as f64),
-            self.hidpi_factor(),
-        )
+        PhysicalSize::from_logical((width as f64, height as f64), self.hidpi_factor())
     }
 
     #[inline]

src/platform_impl/macos/observer.rs

@@ -1,9 +1,9 @@
-use std::{self, ptr, os::raw::*, time::Instant};
+use std::{self, os::raw::*, ptr, time::Instant};
 
 use crate::platform_impl::platform::app_state::AppState;
 
 #[link(name = "CoreFoundation", kind = "framework")]
-extern {
+extern "C" {
     pub static kCFRunLoopDefaultMode: CFRunLoopMode;
     pub static kCFRunLoopCommonModes: CFRunLoopMode;
 
@@ -33,15 +33,8 @@ extern {
         callout: CFRunLoopTimerCallBack,
         context: *mut CFRunLoopTimerContext,
     ) -> CFRunLoopTimerRef;
-    pub fn CFRunLoopAddTimer(
-        rl: CFRunLoopRef,
-        timer: CFRunLoopTimerRef,
-        mode: CFRunLoopMode,
-    );
-    pub fn CFRunLoopTimerSetNextFireDate(
-        timer: CFRunLoopTimerRef,
-        fireDate: CFAbsoluteTime,
-    );
+    pub fn CFRunLoopAddTimer(rl: CFRunLoopRef, timer: CFRunLoopTimerRef, mode: CFRunLoopMode);
+    pub fn CFRunLoopTimerSetNextFireDate(timer: CFRunLoopTimerRef, fireDate: CFAbsoluteTime);
     pub fn CFRunLoopTimerInvalidate(time: CFRunLoopTimerRef);
 
     pub fn CFRunLoopSourceCreate(
@@ -49,11 +42,7 @@ extern {
         order: CFIndex,
         context: *mut CFRunLoopSourceContext,
     ) -> CFRunLoopSourceRef;
-    pub fn CFRunLoopAddSource(
-        rl: CFRunLoopRef,
-        source: CFRunLoopSourceRef,
-        mode: CFRunLoopMode,
-    );
+    pub fn CFRunLoopAddSource(rl: CFRunLoopRef, source: CFRunLoopSourceRef, mode: CFRunLoopMode);
     #[allow(dead_code)]
     pub fn CFRunLoopSourceInvalidate(source: CFRunLoopSourceRef);
     pub fn CFRunLoopSourceSignal(source: CFRunLoopSourceRef);
@@ -98,15 +87,9 @@ pub const kCFRunLoopAfterWaiting: CFRunLoopActivity = 1 << 6;
 #[allow(non_upper_case_globals)]
 pub const kCFRunLoopExit: CFRunLoopActivity = 1 << 7;
 
-pub type CFRunLoopObserverCallBack = extern "C" fn(
-    observer: CFRunLoopObserverRef,
-    activity: CFRunLoopActivity,
-    info: *mut c_void,
-);
-pub type CFRunLoopTimerCallBack = extern "C" fn(
-    timer: CFRunLoopTimerRef,
-    info: *mut c_void
-);
+pub type CFRunLoopObserverCallBack =
+    extern "C" fn(observer: CFRunLoopObserverRef, activity: CFRunLoopActivity, info: *mut c_void);
+pub type CFRunLoopTimerCallBack = extern "C" fn(timer: CFRunLoopTimerRef, info: *mut c_void);
 
 pub enum CFRunLoopObserverContext {}
 pub enum CFRunLoopTimerContext {}
@@ -127,7 +110,7 @@ pub struct CFRunLoopSourceContext {
 }
 
 // begin is queued with the highest priority to ensure it is processed before other observers
-extern fn control_flow_begin_handler(
+extern "C" fn control_flow_begin_handler(
     _: CFRunLoopObserverRef,
     activity: CFRunLoopActivity,
     _: *mut c_void,
@@ -146,7 +129,7 @@ extern fn control_flow_begin_handler(
 
 // end is queued with the lowest priority to ensure it is processed after other observers
 // without that, LoopDestroyed would  get sent after EventsCleared
-extern fn control_flow_end_handler(
+extern "C" fn control_flow_end_handler(
     _: CFRunLoopObserverRef,
     activity: CFRunLoopActivity,
     _: *mut c_void,
@@ -158,7 +141,7 @@ extern fn control_flow_end_handler(
             AppState::cleared();
             //trace!("Completed `CFRunLoopBeforeWaiting`");
         },
-        kCFRunLoopExit => (),//unimplemented!(), // not expected to ever happen
+        kCFRunLoopExit => (), //unimplemented!(), // not expected to ever happen
         _ => unreachable!(),
     }
 }
@@ -204,7 +187,6 @@ pub fn setup_control_flow_observers() {
     }
 }
 
-
 pub struct EventLoopWaker {
     timer: CFRunLoopTimerRef,
 }
@@ -220,7 +202,7 @@ impl Drop for EventLoopWaker {
 
 impl Default for EventLoopWaker {
     fn default() -> EventLoopWaker {
-        extern fn wakeup_main_loop(_timer: CFRunLoopTimerRef, _info: *mut c_void) {}
+        extern "C" fn wakeup_main_loop(_timer: CFRunLoopTimerRef, _info: *mut c_void) {}
         unsafe {
             // create a timer with a 1µs interval (1ns does not work) to mimic polling.
             // it is initially setup with a first fire time really far into the
@@ -257,8 +239,8 @@ impl EventLoopWaker {
             unsafe {
                 let current = CFAbsoluteTimeGetCurrent();
                 let duration = instant - now;
-                let fsecs = duration.subsec_nanos() as f64 / 1_000_000_000.0
-                    + duration.as_secs() as f64;
+                let fsecs =
+                    duration.subsec_nanos() as f64 / 1_000_000_000.0 + duration.as_secs() as f64;
                 CFRunLoopTimerSetNextFireDate(self.timer, current + fsecs)
             }
         }

src/platform_impl/macos/util/async.rs

@@ -10,8 +10,10 @@ use cocoa::{
 };
 use dispatch::ffi::{dispatch_async_f, dispatch_get_main_queue, dispatch_sync_f};
 
-use crate::dpi::LogicalSize;
-use crate::platform_impl::platform::{ffi, util::IdRef, window::SharedState};
+use crate::{
+    dpi::LogicalSize,
+    platform_impl::platform::{ffi, util::IdRef, window::SharedState},
+};
 
 unsafe fn set_style_mask(ns_window: id, ns_view: id, mask: NSWindowStyleMask) {
     ns_window.setStyleMask_(mask);
@@ -26,15 +28,15 @@ struct SetStyleMaskData {
     mask: NSWindowStyleMask,
 }
 impl SetStyleMaskData {
-    fn new_ptr(
-        ns_window: id,
-        ns_view: id,
-        mask: NSWindowStyleMask,
-    ) -> *mut Self {
-        Box::into_raw(Box::new(SetStyleMaskData { ns_window, ns_view, mask }))
+    fn new_ptr(ns_window: id, ns_view: id, mask: NSWindowStyleMask) -> *mut Self {
+        Box::into_raw(Box::new(SetStyleMaskData {
+            ns_window,
+            ns_view,
+            mask,
+        }))
     }
 }
-extern fn set_style_mask_callback(context: *mut c_void) {
+extern "C" fn set_style_mask_callback(context: *mut c_void) {
     unsafe {
         let context_ptr = context as *mut SetStyleMaskData;
         {
@@ -70,14 +72,11 @@ struct SetContentSizeData {
     size: LogicalSize,
 }
 impl SetContentSizeData {
-    fn new_ptr(
-        ns_window: id,
-        size: LogicalSize,
-    ) -> *mut Self {
+    fn new_ptr(ns_window: id, size: LogicalSize) -> *mut Self {
         Box::into_raw(Box::new(SetContentSizeData { ns_window, size }))
     }
 }
-extern fn set_content_size_callback(context: *mut c_void) {
+extern "C" fn set_content_size_callback(context: *mut c_void) {
     unsafe {
         let context_ptr = context as *mut SetContentSizeData;
         {
@@ -109,14 +108,11 @@ struct SetFrameTopLeftPointData {
     point: NSPoint,
 }
 impl SetFrameTopLeftPointData {
-    fn new_ptr(
-        ns_window: id,
-        point: NSPoint,
-    ) -> *mut Self {
+    fn new_ptr(ns_window: id, point: NSPoint) -> *mut Self {
         Box::into_raw(Box::new(SetFrameTopLeftPointData { ns_window, point }))
     }
 }
-extern fn set_frame_top_left_point_callback(context: *mut c_void) {
+extern "C" fn set_frame_top_left_point_callback(context: *mut c_void) {
     unsafe {
         let context_ptr = context as *mut SetFrameTopLeftPointData;
         {
@@ -142,14 +138,11 @@ struct SetLevelData {
     level: ffi::NSWindowLevel,
 }
 impl SetLevelData {
-    fn new_ptr(
-        ns_window: id,
-        level: ffi::NSWindowLevel,
-    ) -> *mut Self {
+    fn new_ptr(ns_window: id, level: ffi::NSWindowLevel) -> *mut Self {
         Box::into_raw(Box::new(SetLevelData { ns_window, level }))
     }
 }
-extern fn set_level_callback(context: *mut c_void) {
+extern "C" fn set_level_callback(context: *mut c_void) {
     unsafe {
         let context_ptr = context as *mut SetLevelData;
         {
@@ -190,7 +183,7 @@ impl ToggleFullScreenData {
         }))
     }
 }
-extern fn toggle_full_screen_callback(context: *mut c_void) {
+extern "C" fn toggle_full_screen_callback(context: *mut c_void) {
     unsafe {
         let context_ptr = context as *mut ToggleFullScreenData;
         {
@@ -227,12 +220,7 @@ pub unsafe fn toggle_full_screen_async(
     not_fullscreen: bool,
     shared_state: Weak<Mutex<SharedState>>,
 ) {
-    let context = ToggleFullScreenData::new_ptr(
-        ns_window,
-        ns_view,
-        not_fullscreen,
-        shared_state,
-    );
+    let context = ToggleFullScreenData::new_ptr(ns_window, ns_view, not_fullscreen, shared_state);
     dispatch_async_f(
         dispatch_get_main_queue(),
         context as *mut _,
@@ -325,7 +313,7 @@ impl OrderOutData {
         Box::into_raw(Box::new(OrderOutData { ns_window }))
     }
 }
-extern fn order_out_callback(context: *mut c_void) {
+extern "C" fn order_out_callback(context: *mut c_void) {
     unsafe {
         let context_ptr = context as *mut OrderOutData;
         {
@@ -354,7 +342,7 @@ impl MakeKeyAndOrderFrontData {
         Box::into_raw(Box::new(MakeKeyAndOrderFrontData { ns_window }))
     }
 }
-extern fn make_key_and_order_front_callback(context: *mut c_void) {
+extern "C" fn make_key_and_order_front_callback(context: *mut c_void) {
     unsafe {
         let context_ptr = context as *mut MakeKeyAndOrderFrontData;
         {
@@ -415,7 +403,7 @@ impl CloseData {
         Box::into_raw(Box::new(CloseData { ns_window }))
     }
 }
-extern fn close_callback(context: *mut c_void) {
+extern "C" fn close_callback(context: *mut c_void) {
     unsafe {
         let context_ptr = context as *mut CloseData;
         {
@@ -431,9 +419,5 @@ extern fn close_callback(context: *mut c_void) {
 // thread. Though, it's a good idea to look into that more...
 pub unsafe fn close_async(ns_window: id) {
     let context = CloseData::new_ptr(ns_window);
-    dispatch_async_f(
-        dispatch_get_main_queue(),
-        context as *mut _,
-        close_callback,
-    );
+    dispatch_async_f(dispatch_get_main_queue(), context as *mut _, close_callback);
 }

src/platform_impl/macos/util/cursor.rs

@@ -1,5 +1,6 @@
 use cocoa::{
-    appkit::NSImage, base::{id, nil},
+    appkit::NSImage,
+    base::{id, nil},
     foundation::{NSDictionary, NSPoint, NSString},
 };
 use objc::runtime::Sel;
@@ -22,7 +23,9 @@ impl From<CursorIcon> for Cursor {
             CursorIcon::VerticalText => Cursor::Native("IBeamCursorForVerticalLayout"),
             CursorIcon::Copy => Cursor::Native("dragCopyCursor"),
             CursorIcon::Alias => Cursor::Native("dragLinkCursor"),
-            CursorIcon::NotAllowed | CursorIcon::NoDrop => Cursor::Native("operationNotAllowedCursor"),
+            CursorIcon::NotAllowed | CursorIcon::NoDrop => {
+                Cursor::Native("operationNotAllowedCursor")
+            },
             CursorIcon::ContextMenu => Cursor::Native("contextualMenuCursor"),
             CursorIcon::Crosshair => Cursor::Native("crosshairCursor"),
             CursorIcon::EResize => Cursor::Native("resizeRightCursor"),
@@ -52,7 +55,9 @@ impl From<CursorIcon> for 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.
-            CursorIcon::Wait | CursorIcon::Progress => Cursor::Undocumented("busyButClickableCursor"),
+            CursorIcon::Wait | CursorIcon::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
@@ -75,18 +80,18 @@ impl Cursor {
         match self {
             Cursor::Native(cursor_name) => {
                 let sel = Sel::register(cursor_name);
-                msg_send![class!(NSCursor), performSelector:sel]
+                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] {
+                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]
+                msg_send![class, performSelector: sel]
             },
             Cursor::WebKit(cursor_name) => load_webkit_cursor(cursor_name),
         }
@@ -104,27 +109,15 @@ pub unsafe fn load_webkit_cursor(cursor_name: &str) -> id {
     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 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);
-    let info = NSDictionary::dictionaryWithContentsOfFile_(
-        nil,
-        info_path,
-    );
+    let info = NSDictionary::dictionaryWithContentsOfFile_(nil, info_path);
     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 point = NSPoint::new(msg_send![x, doubleValue], msg_send![y, doubleValue]);
     let cursor: id = msg_send![class!(NSCursor), alloc];
     msg_send![cursor,
         initWithImage:image

src/platform_impl/macos/util/mod.rs

@@ -1,10 +1,9 @@
 mod r#async;
 mod cursor;
 
-pub use self::{r#async::*, cursor::*};
+pub use self::{cursor::*, r#async::*};
 
-use std::ops::Deref;
-use std::ops::BitAnd;
+use std::ops::{BitAnd, Deref};
 
 use cocoa::{
     appkit::{NSApp, NSWindowStyleMask},
@@ -12,7 +11,7 @@ use cocoa::{
     foundation::{NSAutoreleasePool, NSRect, NSUInteger},
 };
 use core_graphics::display::CGDisplay;
-use objc::runtime::{BOOL, Class, Object, Sel, YES};
+use objc::runtime::{Class, Object, Sel, BOOL, YES};
 
 use crate::platform_impl::platform::ffi;
 
@@ -21,8 +20,8 @@ use crate::platform_impl::platform::ffi;
 pub enum Never {}
 
 pub fn has_flag<T>(bitset: T, flag: T) -> bool
-where T:
-    Copy + PartialEq + BitAnd<T, Output = T>
+where
+    T: Copy + PartialEq + BitAnd<T, Output = T>,
 {
     bitset & flag == flag
 }
@@ -48,7 +47,11 @@ impl IdRef {
     }
 
     pub fn non_nil(self) -> Option<IdRef> {
-        if self.0 == nil { None } else { Some(self) }
+        if self.0 == nil {
+            None
+        } else {
+            Some(self)
+        }
     }
 }
 
@@ -94,16 +97,16 @@ pub unsafe fn superclass<'a>(this: &'a Object) -> &'a Class {
 
 pub unsafe fn create_input_context(view: id) -> IdRef {
     let input_context: id = msg_send![class!(NSTextInputContext), alloc];
-    let input_context: id = msg_send![input_context, initWithClient:view];
+    let input_context: id = msg_send![input_context, initWithClient: view];
     IdRef::new(input_context)
 }
 
 #[allow(dead_code)]
 pub unsafe fn open_emoji_picker() {
-    let () = msg_send![NSApp(), orderFrontCharacterPalette:nil];
+    let () = msg_send![NSApp(), orderFrontCharacterPalette: nil];
 }
 
-pub extern fn yes(_: &Object, _: Sel) -> BOOL {
+pub extern "C" fn yes(_: &Object, _: Sel) -> BOOL {
     YES
 }
 
@@ -120,4 +123,3 @@ pub unsafe fn toggle_style_mask(window: id, view: id, mask: NSWindowStyleMask, o
     // If we don't do this, key handling will break. Therefore, never call `setStyleMask` directly!
     window.makeFirstResponder_(view);
 }
-

src/platform_impl/macos/view.rs

@@ -1,26 +1,39 @@
 use std::{
-    boxed::Box, collections::VecDeque, os::raw::*, slice, str,
+    boxed::Box,
+    collections::VecDeque,
+    os::raw::*,
+    slice, str,
     sync::{Arc, Mutex, Weak},
 };
 
 use cocoa::{
     appkit::{NSApp, NSEvent, NSEventModifierFlags, NSEventPhase, NSView, NSWindow},
-    base::{id, nil}, foundation::{NSPoint, NSRect, NSSize, NSString, NSUInteger},
+    base::{id, nil},
+    foundation::{NSPoint, NSRect, NSSize, NSString, NSUInteger},
+};
+use objc::{
+    declare::ClassDecl,
+    runtime::{Class, Object, Protocol, Sel, BOOL, NO, YES},
 };
-use objc::{declare::ClassDecl, runtime::{BOOL, Class, NO, Object, Protocol, Sel, YES}};
 
 use crate::{
     event::{
-        DeviceEvent, ElementState, Event, KeyboardInput, MouseButton,
-        MouseScrollDelta, TouchPhase, VirtualKeyCode, WindowEvent,
+        DeviceEvent, ElementState, Event, KeyboardInput, MouseButton, MouseScrollDelta, TouchPhase,
+        VirtualKeyCode, WindowEvent,
+    },
+    platform_impl::platform::{
+        app_state::AppState,
+        event::{
+            char_to_keycode, check_function_keys, event_mods, get_scancode, modifier_event,
+            scancode_to_keycode,
+        },
+        ffi::*,
+        util::{self, IdRef},
+        window::get_window_id,
+        DEVICE_ID,
     },
     window::WindowId,
 };
-use crate::platform_impl::platform::{
-    app_state::AppState, DEVICE_ID,
-    event::{check_function_keys, event_mods, modifier_event, char_to_keycode, get_scancode, scancode_to_keycode},
-    util::{self, IdRef}, ffi::*, window::get_window_id,
-};
 
 #[derive(Default)]
 struct Modifiers {
@@ -54,17 +67,18 @@ pub fn new_view(ns_window: id) -> (IdRef, Weak<Mutex<util::Cursor>>) {
         // This is free'd in `dealloc`
         let state_ptr = Box::into_raw(Box::new(state)) as *mut c_void;
         let ns_view: id = msg_send![VIEW_CLASS.0, alloc];
-        (IdRef::new(msg_send![ns_view, initWithWinit:state_ptr]), cursor_access)
+        (
+            IdRef::new(msg_send![ns_view, initWithWinit: state_ptr]),
+            cursor_access,
+        )
     }
 }
 
 pub unsafe fn set_ime_position(ns_view: id, input_context: id, x: f64, y: f64) {
     let state_ptr: *mut c_void = *(*ns_view).get_mut_ivar("winitState");
     let state = &mut *(state_ptr as *mut ViewState);
-    let content_rect = NSWindow::contentRectForFrameRect_(
-        state.ns_window,
-        NSWindow::frame(state.ns_window),
-    );
+    let content_rect =
+        NSWindow::contentRectForFrameRect_(state.ns_window, NSWindow::frame(state.ns_window));
     let base_x = content_rect.origin.x as f64;
     let base_y = (content_rect.origin.y + content_rect.size.height) as f64;
     state.ime_spot = Some((base_x + x, base_y - y));
@@ -79,161 +93,148 @@ lazy_static! {
     static ref VIEW_CLASS: ViewClass = unsafe {
         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!(dealloc), dealloc as extern "C" fn(&Object, Sel));
         decl.add_method(
             sel!(initWithWinit:),
-            init_with_winit as extern fn(&Object, Sel, *mut c_void) -> id,
+            init_with_winit as extern "C" fn(&Object, Sel, *mut c_void) -> id,
         );
         decl.add_method(
             sel!(viewDidMoveToWindow),
-            view_did_move_to_window as extern fn(&Object, Sel),
+            view_did_move_to_window as extern "C" fn(&Object, Sel),
         );
         decl.add_method(
             sel!(drawRect:),
-            draw_rect as extern fn(&Object, Sel, id),
+            draw_rect as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(acceptsFirstResponder),
-            accepts_first_responder as extern fn(&Object, Sel) -> BOOL,
+            accepts_first_responder as extern "C" fn(&Object, Sel) -> BOOL,
         );
         decl.add_method(
             sel!(touchBar),
-            touch_bar as extern fn(&Object, Sel) -> BOOL,
+            touch_bar as extern "C" fn(&Object, Sel) -> BOOL,
         );
         decl.add_method(
             sel!(resetCursorRects),
-            reset_cursor_rects as extern fn(&Object, Sel),
+            reset_cursor_rects as extern "C" fn(&Object, Sel),
         );
         decl.add_method(
             sel!(hasMarkedText),
-           has_marked_text as extern fn(&Object, Sel) -> BOOL,
+            has_marked_text as extern "C" fn(&Object, Sel) -> BOOL,
         );
         decl.add_method(
             sel!(markedRange),
-            marked_range as extern fn(&Object, Sel) -> NSRange,
+            marked_range as extern "C" fn(&Object, Sel) -> NSRange,
         );
         decl.add_method(
             sel!(selectedRange),
-           selected_range as extern fn(&Object, Sel) -> NSRange,
+            selected_range as extern "C" fn(&Object, Sel) -> NSRange,
         );
         decl.add_method(
             sel!(setMarkedText:selectedRange:replacementRange:),
-            set_marked_text as extern fn(&mut Object, Sel, id, NSRange, NSRange),
-        );
-        decl.add_method(
-            sel!(unmarkText),
-           unmark_text as extern fn(&Object, Sel),
+            set_marked_text as extern "C" fn(&mut Object, Sel, id, NSRange, NSRange),
         );
+        decl.add_method(sel!(unmarkText), unmark_text as extern "C" fn(&Object, Sel));
         decl.add_method(
             sel!(validAttributesForMarkedText),
-            valid_attributes_for_marked_text as extern fn(&Object, Sel) -> id,
+            valid_attributes_for_marked_text as extern "C" fn(&Object, Sel) -> id,
         );
         decl.add_method(
             sel!(attributedSubstringForProposedRange:actualRange:),
-            attributed_substring_for_proposed_range as extern fn(&Object, Sel, NSRange, *mut c_void) -> id,
+            attributed_substring_for_proposed_range
+                as extern "C" fn(&Object, Sel, NSRange, *mut c_void) -> id,
         );
         decl.add_method(
             sel!(insertText:replacementRange:),
-            insert_text as extern fn(&Object, Sel, id, NSRange),
+            insert_text as extern "C" fn(&Object, Sel, id, NSRange),
         );
         decl.add_method(
             sel!(characterIndexForPoint:),
-            character_index_for_point as extern fn(&Object, Sel, NSPoint) -> NSUInteger,
+            character_index_for_point as extern "C" fn(&Object, Sel, NSPoint) -> NSUInteger,
         );
         decl.add_method(
             sel!(firstRectForCharacterRange:actualRange:),
-            first_rect_for_character_range as extern fn(&Object, Sel, NSRange, *mut c_void) -> NSRect,
+            first_rect_for_character_range
+                as extern "C" fn(&Object, Sel, NSRange, *mut c_void) -> NSRect,
         );
         decl.add_method(
             sel!(doCommandBySelector:),
-            do_command_by_selector as extern fn(&Object, Sel, Sel),
-        );
-        decl.add_method(
-            sel!(keyDown:),
-            key_down as extern fn(&Object, Sel, id),
-        );
-        decl.add_method(
-            sel!(keyUp:),
-            key_up as extern fn(&Object, Sel, id),
+            do_command_by_selector as extern "C" fn(&Object, Sel, Sel),
         );
+        decl.add_method(sel!(keyDown:), key_down as extern "C" fn(&Object, Sel, id));
+        decl.add_method(sel!(keyUp:), key_up as extern "C" fn(&Object, Sel, id));
         decl.add_method(
             sel!(flagsChanged:),
-            flags_changed as extern fn(&Object, Sel, id),
+            flags_changed as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(insertTab:),
-            insert_tab as extern fn(&Object, Sel, id),
+            insert_tab as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(insertBackTab:),
-            insert_back_tab as extern fn(&Object, Sel, id),
+            insert_back_tab as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(mouseDown:),
-            mouse_down as extern fn(&Object, Sel, id),
-        );
-        decl.add_method(
-            sel!(mouseUp:),
-            mouse_up as extern fn(&Object, Sel, id),
+            mouse_down as extern "C" fn(&Object, Sel, id),
         );
+        decl.add_method(sel!(mouseUp:), mouse_up as extern "C" fn(&Object, Sel, id));
         decl.add_method(
             sel!(rightMouseDown:),
-            right_mouse_down as extern fn(&Object, Sel, id),
+            right_mouse_down as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(rightMouseUp:),
-            right_mouse_up as extern fn(&Object, Sel, id),
+            right_mouse_up as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(otherMouseDown:),
-            other_mouse_down as extern fn(&Object, Sel, id),
+            other_mouse_down as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(otherMouseUp:),
-            other_mouse_up as extern fn(&Object, Sel, id),
+            other_mouse_up as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(mouseMoved:),
-            mouse_moved as extern fn(&Object, Sel, id),
+            mouse_moved as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(mouseDragged:),
-            mouse_dragged as extern fn(&Object, Sel, id),
+            mouse_dragged as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(rightMouseDragged:),
-            right_mouse_dragged as extern fn(&Object, Sel, id),
+            right_mouse_dragged as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(otherMouseDragged:),
-            other_mouse_dragged as extern fn(&Object, Sel, id),
+            other_mouse_dragged as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(mouseEntered:),
-            mouse_entered as extern fn(&Object, Sel, id),
+            mouse_entered as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(mouseExited:),
-            mouse_exited as extern fn(&Object, Sel, id),
+            mouse_exited as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(scrollWheel:),
-            scroll_wheel as extern fn(&Object, Sel, id),
+            scroll_wheel as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(pressureChangeWithEvent:),
-            pressure_change_with_event as extern fn(&Object, Sel, id),
+            pressure_change_with_event as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(_wantsKeyDownForEvent:),
-            wants_key_down_for_event as extern fn(&Object, Sel, id) -> BOOL,
+            wants_key_down_for_event as extern "C" fn(&Object, Sel, id) -> BOOL,
         );
         decl.add_method(
             sel!(cancelOperation:),
-            cancel_operation as extern fn(&Object, Sel, id),
+            cancel_operation as extern "C" fn(&Object, Sel, id),
         );
         decl.add_ivar::<*mut c_void>("winitState");
         decl.add_ivar::<id>("markedText");
@@ -243,7 +244,7 @@ lazy_static! {
     };
 }
 
-extern fn dealloc(this: &Object, _sel: Sel) {
+extern "C" fn dealloc(this: &Object, _sel: Sel) {
     unsafe {
         let state: *mut c_void = *this.get_ivar("winitState");
         let marked_text: id = *this.get_ivar("markedText");
@@ -252,21 +253,20 @@ extern fn dealloc(this: &Object, _sel: Sel) {
     }
 }
 
-extern fn init_with_winit(this: &Object, _sel: Sel, state: *mut c_void) -> id {
+extern "C" fn init_with_winit(this: &Object, _sel: Sel, state: *mut c_void) -> id {
     unsafe {
         let this: id = msg_send![this, init];
         if this != nil {
             (*this).set_ivar("winitState", state);
-            let marked_text = <id as NSMutableAttributedString>::init(
-                NSMutableAttributedString::alloc(nil),
-            );
+            let marked_text =
+                <id as NSMutableAttributedString>::init(NSMutableAttributedString::alloc(nil));
             (*this).set_ivar("markedText", marked_text);
         }
         this
     }
 }
 
-extern fn view_did_move_to_window(this: &Object, _sel: Sel) {
+extern "C" fn view_did_move_to_window(this: &Object, _sel: Sel) {
     trace!("Triggered `viewDidMoveToWindow`");
     unsafe {
         let rect: NSRect = msg_send![this, visibleRect];
@@ -280,7 +280,7 @@ extern fn view_did_move_to_window(this: &Object, _sel: Sel) {
     trace!("Completed `viewDidMoveToWindow`");
 }
 
-extern fn draw_rect(this: &Object, _sel: Sel, rect: id) {
+extern "C" fn draw_rect(this: &Object, _sel: Sel, rect: id) {
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);
@@ -288,22 +288,22 @@ extern fn draw_rect(this: &Object, _sel: Sel, rect: id) {
         AppState::queue_redraw(WindowId(get_window_id(state.ns_window)));
 
         let superclass = util::superclass(this);
-        let () = msg_send![super(this, superclass), drawRect:rect];
+        let () = msg_send![super(this, superclass), drawRect: rect];
     }
 }
 
-extern fn accepts_first_responder(_this: &Object, _sel: Sel) -> BOOL {
+extern "C" fn accepts_first_responder(_this: &Object, _sel: Sel) -> BOOL {
     YES
 }
 
 // This is necessary to prevent a beefy terminal error on MacBook Pros:
 // IMKInputSession [0x7fc573576ff0 presentFunctionRowItemTextInputViewWithEndpoint:completionHandler:] : [self textInputContext]=0x7fc573558e10 *NO* NSRemoteViewController to client, NSError=Error Domain=NSCocoaErrorDomain Code=4099 "The connection from pid 0 was invalidated from this process." UserInfo={NSDebugDescription=The connection from pid 0 was invalidated from this process.}, com.apple.inputmethod.EmojiFunctionRowItem
 // TODO: Add an API extension for using `NSTouchBar`
-extern fn touch_bar(_this: &Object, _sel: Sel) -> BOOL {
+extern "C" fn touch_bar(_this: &Object, _sel: Sel) -> BOOL {
     NO
 }
 
-extern fn reset_cursor_rects(this: &Object, _sel: Sel) {
+extern "C" 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);
@@ -317,8 +317,7 @@ extern fn reset_cursor_rects(this: &Object, _sel: Sel) {
     }
 }
 
-
-extern fn has_marked_text(this: &Object, _sel: Sel) -> BOOL {
+extern "C" fn has_marked_text(this: &Object, _sel: Sel) -> BOOL {
     unsafe {
         trace!("Triggered `hasMarkedText`");
         let marked_text: id = *this.get_ivar("markedText");
@@ -327,7 +326,7 @@ extern fn has_marked_text(this: &Object, _sel: Sel) -> BOOL {
     }
 }
 
-extern fn marked_range(this: &Object, _sel: Sel) -> NSRange {
+extern "C" fn marked_range(this: &Object, _sel: Sel) -> NSRange {
     unsafe {
         trace!("Triggered `markedRange`");
         let marked_text: id = *this.get_ivar("markedText");
@@ -341,13 +340,13 @@ extern fn marked_range(this: &Object, _sel: Sel) -> NSRange {
     }
 }
 
-extern fn selected_range(_this: &Object, _sel: Sel) -> NSRange {
+extern "C" fn selected_range(_this: &Object, _sel: Sel) -> NSRange {
     trace!("Triggered `selectedRange`");
     trace!("Completed `selectedRange`");
     util::EMPTY_RANGE
 }
 
-extern fn set_marked_text(
+extern "C" fn set_marked_text(
     this: &mut Object,
     _sel: Sel,
     string: id,
@@ -359,7 +358,7 @@ 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 {
@@ -370,7 +369,7 @@ extern fn set_marked_text(
     trace!("Completed `setMarkedText`");
 }
 
-extern fn unmark_text(this: &Object, _sel: Sel) {
+extern "C" fn unmark_text(this: &Object, _sel: Sel) {
     trace!("Triggered `unmarkText`");
     unsafe {
         let marked_text: id = *this.get_ivar("markedText");
@@ -382,13 +381,13 @@ extern fn unmark_text(this: &Object, _sel: Sel) {
     trace!("Completed `unmarkText`");
 }
 
-extern fn valid_attributes_for_marked_text(_this: &Object, _sel: Sel) -> id {
+extern "C" fn valid_attributes_for_marked_text(_this: &Object, _sel: Sel) -> id {
     trace!("Triggered `validAttributesForMarkedText`");
     trace!("Completed `validAttributesForMarkedText`");
     unsafe { msg_send![class!(NSArray), array] }
 }
 
-extern fn attributed_substring_for_proposed_range(
+extern "C" fn attributed_substring_for_proposed_range(
     _this: &Object,
     _sel: Sel,
     _range: NSRange,
@@ -399,13 +398,13 @@ extern fn attributed_substring_for_proposed_range(
     nil
 }
 
-extern fn character_index_for_point(_this: &Object, _sel: Sel, _point: NSPoint) -> NSUInteger {
+extern "C" fn character_index_for_point(_this: &Object, _sel: Sel, _point: NSPoint) -> NSUInteger {
     trace!("Triggered `characterIndexForPoint`");
     trace!("Completed `characterIndexForPoint`");
     0
 }
 
-extern fn first_rect_for_character_range(
+extern "C" fn first_rect_for_character_range(
     this: &Object,
     _sel: Sel,
     _range: NSRange,
@@ -425,20 +424,17 @@ extern fn first_rect_for_character_range(
             (x, y)
         });
         trace!("Completed `firstRectForCharacterRange`");
-        NSRect::new(
-            NSPoint::new(x as _, y as _),
-            NSSize::new(0.0, 0.0),
-        )
+        NSRect::new(NSPoint::new(x as _, y as _), NSSize::new(0.0, 0.0))
     }
 }
 
-extern fn insert_text(this: &Object, _sel: Sel, string: id, _replacement_range: NSRange) {
+extern "C" fn insert_text(this: &Object, _sel: Sel, string: id, _replacement_range: NSRange) {
     trace!("Triggered `insertText`");
     unsafe {
         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]
@@ -447,10 +443,8 @@ extern fn insert_text(this: &Object, _sel: Sel, string: id, _replacement_range:
             string
         };
 
-        let slice = slice::from_raw_parts(
-            characters.UTF8String() as *const c_uchar,
-            characters.len(),
-        );
+        let slice =
+            slice::from_raw_parts(characters.UTF8String() as *const c_uchar, characters.len());
         let string = str::from_utf8_unchecked(slice);
         state.is_key_down = true;
 
@@ -470,7 +464,7 @@ extern fn insert_text(this: &Object, _sel: Sel, string: id, _replacement_range:
     trace!("Completed `insertText`");
 }
 
-extern fn do_command_by_selector(this: &Object, _sel: Sel, command: Sel) {
+extern "C" fn do_command_by_selector(this: &Object, _sel: Sel, command: Sel) {
     trace!("Triggered `doCommandBySelector`");
     // Basically, we're sent this message whenever a keyboard event that doesn't generate a "human readable" character
     // happens, i.e. newlines, tabs, and Ctrl+C.
@@ -513,10 +507,8 @@ fn get_characters(event: id, ignore_modifiers: bool) -> String {
         };
 
         assert_ne!(characters, nil);
-        let slice = slice::from_raw_parts(
-            characters.UTF8String() as *const c_uchar,
-            characters.len(),
-        );
+        let slice =
+            slice::from_raw_parts(characters.UTF8String() as *const c_uchar, characters.len());
 
         let string = str::from_utf8_unchecked(slice);
         string.to_owned()
@@ -528,15 +520,15 @@ fn retrieve_keycode(event: id) -> Option<VirtualKeyCode> {
     #[inline]
     fn get_code(ev: id, raw: bool) -> Option<VirtualKeyCode> {
         let characters = get_characters(ev, raw);
-        characters.chars().next().map_or(None, |c| char_to_keycode(c))
+        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)
-        });
+    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).
@@ -546,14 +538,11 @@ fn retrieve_keycode(event: id) -> Option<VirtualKeyCode> {
     // in characters property.
     code.or_else(|| {
         let scancode = get_scancode(event);
-        scancode_to_keycode(scancode)
-            .or_else(|| {
-                check_function_keys(&get_characters(event, true))
-            })
+        scancode_to_keycode(scancode).or_else(|| check_function_keys(&get_characters(event, true)))
     })
 }
 
-extern fn key_down(this: &Object, _sel: Sel, event: id) {
+extern "C" fn key_down(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `keyDown`");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
@@ -601,14 +590,14 @@ 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 _: () = msg_send![this, interpretKeyEvents:array];
+            let array: id = msg_send![class!(NSArray), arrayWithObject: event];
+            let _: () = msg_send![this, interpretKeyEvents: array];
         }
     }
     trace!("Completed `keyDown`");
 }
 
-extern fn key_up(this: &Object, _sel: Sel, event: id) {
+extern "C" fn key_up(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `keyUp`");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
@@ -637,7 +626,7 @@ extern fn key_up(this: &Object, _sel: Sel, event: id) {
     trace!("Completed `keyUp`");
 }
 
-extern fn flags_changed(this: &Object, _sel: Sel, event: id) {
+extern "C" fn flags_changed(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `flagsChanged`");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
@@ -691,31 +680,31 @@ extern fn flags_changed(this: &Object, _sel: Sel, event: id) {
     trace!("Completed `flagsChanged`");
 }
 
-extern fn insert_tab(this: &Object, _sel: Sel, _sender: id) {
+extern "C" fn insert_tab(this: &Object, _sel: Sel, _sender: id) {
     unsafe {
         let window: id = msg_send![this, window];
         let first_responder: id = msg_send![window, firstResponder];
         let this_ptr = this as *const _ as *mut _;
         if first_responder == this_ptr {
-            let (): _ = msg_send![window, selectNextKeyView:this];
+            let (): _ = msg_send![window, selectNextKeyView: this];
         }
     }
 }
 
-extern fn insert_back_tab(this: &Object, _sel: Sel, _sender: id) {
+extern "C" fn insert_back_tab(this: &Object, _sel: Sel, _sender: id) {
     unsafe {
         let window: id = msg_send![this, window];
         let first_responder: id = msg_send![window, firstResponder];
         let this_ptr = this as *const _ as *mut _;
         if first_responder == this_ptr {
-            let (): _ = msg_send![window, selectPreviousKeyView:this];
+            let (): _ = msg_send![window, selectPreviousKeyView: this];
         }
     }
 }
 
 // Allows us to receive Cmd-. (the shortcut for closing a dialog)
 // https://bugs.eclipse.org/bugs/show_bug.cgi?id=300620#c6
-extern fn cancel_operation(this: &Object, _sel: Sel, _sender: id) {
+extern "C" fn cancel_operation(this: &Object, _sel: Sel, _sender: id) {
     trace!("Triggered `cancelOperation`");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
@@ -764,27 +753,27 @@ fn mouse_click(this: &Object, event: id, button: MouseButton, button_state: Elem
     }
 }
 
-extern fn mouse_down(this: &Object, _sel: Sel, event: id) {
+extern "C" fn mouse_down(this: &Object, _sel: Sel, event: id) {
     mouse_click(this, event, MouseButton::Left, ElementState::Pressed);
 }
 
-extern fn mouse_up(this: &Object, _sel: Sel, event: id) {
+extern "C" fn mouse_up(this: &Object, _sel: Sel, event: id) {
     mouse_click(this, event, MouseButton::Left, ElementState::Released);
 }
 
-extern fn right_mouse_down(this: &Object, _sel: Sel, event: id) {
+extern "C" fn right_mouse_down(this: &Object, _sel: Sel, event: id) {
     mouse_click(this, event, MouseButton::Right, ElementState::Pressed);
 }
 
-extern fn right_mouse_up(this: &Object, _sel: Sel, event: id) {
+extern "C" fn right_mouse_up(this: &Object, _sel: Sel, event: id) {
     mouse_click(this, event, MouseButton::Right, ElementState::Released);
 }
 
-extern fn other_mouse_down(this: &Object, _sel: Sel, event: id) {
+extern "C" fn other_mouse_down(this: &Object, _sel: Sel, event: id) {
     mouse_click(this, event, MouseButton::Middle, ElementState::Pressed);
 }
 
-extern fn other_mouse_up(this: &Object, _sel: Sel, event: id) {
+extern "C" fn other_mouse_up(this: &Object, _sel: Sel, event: id) {
     mouse_click(this, event, MouseButton::Middle, ElementState::Released);
 }
 
@@ -803,7 +792,8 @@ fn mouse_motion(this: &Object, event: id) {
         if view_point.x.is_sign_negative()
             || view_point.y.is_sign_negative()
             || view_point.x > view_rect.size.width
-        || view_point.y > view_rect.size.height {
+            || view_point.y > view_rect.size.height
+        {
             // Point is outside of the client area (view)
             return;
         }
@@ -824,23 +814,23 @@ fn mouse_motion(this: &Object, event: id) {
     }
 }
 
-extern fn mouse_moved(this: &Object, _sel: Sel, event: id) {
+extern "C" fn mouse_moved(this: &Object, _sel: Sel, event: id) {
     mouse_motion(this, event);
 }
 
-extern fn mouse_dragged(this: &Object, _sel: Sel, event: id) {
+extern "C" fn mouse_dragged(this: &Object, _sel: Sel, event: id) {
     mouse_motion(this, event);
 }
 
-extern fn right_mouse_dragged(this: &Object, _sel: Sel, event: id) {
+extern "C" fn right_mouse_dragged(this: &Object, _sel: Sel, event: id) {
     mouse_motion(this, event);
 }
 
-extern fn other_mouse_dragged(this: &Object, _sel: Sel, event: id) {
+extern "C" fn other_mouse_dragged(this: &Object, _sel: Sel, event: id) {
     mouse_motion(this, event);
 }
 
-extern fn mouse_entered(this: &Object, _sel: Sel, event: id) {
+extern "C" fn mouse_entered(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `mouseEntered`");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
@@ -848,7 +838,9 @@ extern fn mouse_entered(this: &Object, _sel: Sel, event: id) {
 
         let enter_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.ns_window)),
-            event: WindowEvent::CursorEntered { device_id: DEVICE_ID },
+            event: WindowEvent::CursorEntered {
+                device_id: DEVICE_ID,
+            },
         };
 
         let move_event = {
@@ -866,7 +858,7 @@ extern fn mouse_entered(this: &Object, _sel: Sel, event: id) {
                     device_id: DEVICE_ID,
                     position: (x, y).into(),
                     modifiers: event_mods(event),
-                }
+                },
             }
         };
 
@@ -876,7 +868,7 @@ extern fn mouse_entered(this: &Object, _sel: Sel, event: id) {
     trace!("Completed `mouseEntered`");
 }
 
-extern fn mouse_exited(this: &Object, _sel: Sel, _event: id) {
+extern "C" fn mouse_exited(this: &Object, _sel: Sel, _event: id) {
     trace!("Triggered `mouseExited`");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
@@ -884,7 +876,9 @@ extern fn mouse_exited(this: &Object, _sel: Sel, _event: id) {
 
         let window_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.ns_window)),
-            event: WindowEvent::CursorLeft { device_id: DEVICE_ID },
+            event: WindowEvent::CursorLeft {
+                device_id: DEVICE_ID,
+            },
         };
 
         AppState::queue_event(window_event);
@@ -892,7 +886,7 @@ extern fn mouse_exited(this: &Object, _sel: Sel, _event: id) {
     trace!("Completed `mouseExited`");
 }
 
-extern fn scroll_wheel(this: &Object, _sel: Sel, event: id) {
+extern "C" fn scroll_wheel(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `scrollWheel`");
     unsafe {
         let delta = {
@@ -904,7 +898,9 @@ extern fn scroll_wheel(this: &Object, _sel: Sel, event: id) {
             }
         };
         let phase = match event.phase() {
-            NSEventPhase::NSEventPhaseMayBegin | NSEventPhase::NSEventPhaseBegan => TouchPhase::Started,
+            NSEventPhase::NSEventPhaseMayBegin | NSEventPhase::NSEventPhaseBegan => {
+                TouchPhase::Started
+            },
             NSEventPhase::NSEventPhaseEnded => TouchPhase::Ended,
             _ => TouchPhase::Moved,
         };
@@ -933,7 +929,7 @@ extern fn scroll_wheel(this: &Object, _sel: Sel, event: id) {
     trace!("Completed `scrollWheel`");
 }
 
-extern fn pressure_change_with_event(this: &Object, _sel: Sel, event: id) {
+extern "C" fn pressure_change_with_event(this: &Object, _sel: Sel, event: id) {
     trace!("Triggered `pressureChangeWithEvent`");
     unsafe {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
@@ -959,6 +955,6 @@ extern fn pressure_change_with_event(this: &Object, _sel: Sel, event: id) {
 // Allows us to receive Ctrl-Tab and Ctrl-Esc.
 // Note that this *doesn't* help with any missing Cmd inputs.
 // https://github.com/chromium/chromium/blob/a86a8a6bcfa438fa3ac2eba6f02b3ad1f8e0756f/ui/views/cocoa/bridged_content_view.mm#L816
-extern fn wants_key_down_for_event(_this: &Object, _sel: Sel, _event: id) -> BOOL {
+extern "C" fn wants_key_down_for_event(_this: &Object, _sel: Sel, _event: id) -> BOOL {
     YES
 }

src/platform_impl/macos/window.rs

@@ -1,34 +1,44 @@
 use std::{
-    collections::VecDeque, f64, os::raw::c_void,
-    sync::{Arc, atomic::{Ordering, AtomicBool}, Mutex, Weak},
+    collections::VecDeque,
+    f64,
+    os::raw::c_void,
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        Arc, Mutex, Weak,
+    },
 };
 
 use cocoa::{
     appkit::{
         self, CGFloat, NSApp, NSApplication, NSApplicationActivationPolicy,
-        NSColor, NSRequestUserAttentionType, NSScreen, NSView, NSWindow,
-        NSWindowButton, NSWindowStyleMask, NSApplicationPresentationOptions
+        NSApplicationPresentationOptions, NSColor, NSRequestUserAttentionType, NSScreen, NSView,
+        NSWindow, NSWindowButton, NSWindowStyleMask,
     },
     base::{id, nil},
     foundation::{NSAutoreleasePool, NSDictionary, NSPoint, NSRect, NSSize, NSString},
 };
 use core_graphics::display::CGDisplay;
-use objc::{runtime::{Class, Object, Sel, BOOL, YES, NO}, declare::ClassDecl};
+use objc::{
+    declare::ClassDecl,
+    runtime::{Class, Object, Sel, BOOL, NO, YES},
+};
 
 use crate::{
-    dpi::{LogicalPosition, LogicalSize}, icon::Icon,
+    dpi::{LogicalPosition, LogicalSize},
     error::{ExternalError, NotSupportedError, OsError as RootOsError},
+    icon::Icon,
     monitor::MonitorHandle as RootMonitorHandle,
-    window::{
-        CursorIcon, WindowAttributes, WindowId as RootWindowId,
-    },
-};
-use crate::platform::macos::{ActivationPolicy, WindowExtMacOS};
-use crate::platform_impl::platform::{
-    OsError,
-    app_state::AppState, ffi, monitor::{self, MonitorHandle},
-    util::{self, IdRef}, view::{self, new_view},
+    platform::macos::{ActivationPolicy, WindowExtMacOS},
+    platform_impl::platform::{
+        app_state::AppState,
+        ffi,
+        monitor::{self, MonitorHandle},
+        util::{self, IdRef},
+        view::{self, new_view},
         window_delegate::new_delegate,
+        OsError,
+    },
+    window::{CursorIcon, WindowAttributes, WindowId as RootWindowId},
 };
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -112,7 +122,8 @@ fn create_window(
         let frame = match screen {
             Some(screen) => appkit::NSScreen::frame(screen),
             None => {
-                let (width, height) = attrs.inner_size
+                let (width, height) = attrs
+                    .inner_size
                     .map(|logical| (logical.width, logical.height))
                     .unwrap_or_else(|| (800.0, 600.0));
                 NSRect::new(NSPoint::new(0.0, 0.0), NSSize::new(width, height))
@@ -122,18 +133,16 @@ fn create_window(
         let mut masks = if !attrs.decorations && !screen.is_some() {
             // Resizable UnownedWindow without a titlebar or borders
             // if decorations is set to false, ignore pl_attrs
-            NSWindowStyleMask::NSBorderlessWindowMask
-                | NSWindowStyleMask::NSResizableWindowMask
+            NSWindowStyleMask::NSBorderlessWindowMask | NSWindowStyleMask::NSResizableWindowMask
         } else if pl_attrs.titlebar_hidden {
             // if the titlebar is hidden, ignore other pl_attrs
-            NSWindowStyleMask::NSBorderlessWindowMask |
-                NSWindowStyleMask::NSResizableWindowMask
+            NSWindowStyleMask::NSBorderlessWindowMask | NSWindowStyleMask::NSResizableWindowMask
         } else {
             // default case, resizable window with titlebar and titlebar buttons
-            NSWindowStyleMask::NSClosableWindowMask |
-                NSWindowStyleMask::NSMiniaturizableWindowMask |
-                NSWindowStyleMask::NSResizableWindowMask |
-                NSWindowStyleMask::NSTitledWindowMask
+            NSWindowStyleMask::NSClosableWindowMask
+                | NSWindowStyleMask::NSMiniaturizableWindowMask
+                | NSWindowStyleMask::NSResizableWindowMask
+                | NSWindowStyleMask::NSTitledWindowMask
         };
 
         if !attrs.resizable {
@@ -171,7 +180,7 @@ fn create_window(
                     NSWindowButton::NSWindowZoomButton,
                 ] {
                     let button = ns_window.standardWindowButton_(*titlebar_button);
-                    let _: () = msg_send![button, setHidden:YES];
+                    let _: () = msg_send![button, setHidden: YES];
                 }
             }
             if pl_attrs.movable_by_window_background {
@@ -179,7 +188,10 @@ fn create_window(
             }
 
             if attrs.always_on_top {
-                let _: () = msg_send![*ns_window, setLevel:ffi::NSWindowLevel::NSFloatingWindowLevel];
+                let _: () = msg_send![
+                    *ns_window,
+                    setLevel: ffi::NSWindowLevel::NSFloatingWindowLevel
+                ];
             }
 
             if let Some(increments) = pl_attrs.resize_increments {
@@ -206,8 +218,14 @@ lazy_static! {
     static ref WINDOW_CLASS: WindowClass = unsafe {
         let window_superclass = class!(NSWindow);
         let mut decl = ClassDecl::new("WinitWindow", window_superclass).unwrap();
-        decl.add_method(sel!(canBecomeMainWindow), util::yes as extern fn(&Object, Sel) -> BOOL);
-        decl.add_method(sel!(canBecomeKeyWindow), util::yes as extern fn(&Object, Sel) -> BOOL);
+        decl.add_method(
+            sel!(canBecomeMainWindow),
+            util::yes as extern "C" fn(&Object, Sel) -> BOOL,
+        );
+        decl.add_method(
+            sel!(canBecomeKeyWindow),
+            util::yes as extern "C" fn(&Object, Sel) -> BOOL,
+        );
         WindowClass(decl.register())
     };
 }
@@ -242,7 +260,7 @@ impl From<WindowAttributes> for SharedState {
             // identical, resulting in a no-op.
             fullscreen: None,
             maximized: attribs.maximized,
-            .. Default::default()
+            ..Default::default()
         }
     }
 }
@@ -298,15 +316,20 @@ impl UnownedWindow {
 
             ns_app.activateIgnoringOtherApps_(YES);
 
-            win_attribs.min_inner_size.map(|dim| set_min_inner_size(*ns_window, dim));
-            win_attribs.max_inner_size.map(|dim| set_max_inner_size(*ns_window, dim));
+            win_attribs
+                .min_inner_size
+                .map(|dim| set_min_inner_size(*ns_window, dim));
+            win_attribs
+                .max_inner_size
+                .map(|dim| set_max_inner_size(*ns_window, dim));
 
             use cocoa::foundation::NSArray;
             // register for drag and drop operations.
-            let () = msg_send![*ns_window, registerForDraggedTypes:NSArray::arrayWithObject(
-                nil,
-                appkit::NSFilenamesPboardType,
-            )];
+            let () = msg_send![
+                *ns_window,
+                registerForDraggedTypes:
+                    NSArray::arrayWithObject(nil, appkit::NSFilenamesPboardType)
+            ];
         }
 
         // Since `win_attribs` is put into a mutex below, we'll just copy these
@@ -364,19 +387,11 @@ impl UnownedWindow {
     }
 
     fn set_style_mask_async(&self, mask: NSWindowStyleMask) {
-        unsafe { util::set_style_mask_async(
-            *self.ns_window,
-            *self.ns_view,
-            mask,
-        ) };
+        unsafe { util::set_style_mask_async(*self.ns_window, *self.ns_view, mask) };
     }
 
     fn set_style_mask_sync(&self, mask: NSWindowStyleMask) {
-        unsafe { util::set_style_mask_sync(
-            *self.ns_window,
-            *self.ns_view,
-            mask,
-        ) };
+        unsafe { util::set_style_mask_sync(*self.ns_window, *self.ns_view, mask) };
     }
 
     pub fn id(&self) -> Id {
@@ -405,20 +420,19 @@ impl UnownedWindow {
         Ok((
             frame_rect.origin.x as f64,
             util::bottom_left_to_top_left(frame_rect),
-        ).into())
+        )
+            .into())
     }
 
     pub fn inner_position(&self) -> Result<LogicalPosition, NotSupportedError> {
         let content_rect = unsafe {
-            NSWindow::contentRectForFrameRect_(
-                *self.ns_window,
-                NSWindow::frame(*self.ns_window),
-            )
+            NSWindow::contentRectForFrameRect_(*self.ns_window, NSWindow::frame(*self.ns_window))
         };
         Ok((
             content_rect.origin.x as f64,
             util::bottom_left_to_top_left(content_rect),
-        ).into())
+        )
+            .into())
     }
 
     pub fn set_outer_position(&self, position: LogicalPosition) {
@@ -529,7 +543,10 @@ impl UnownedWindow {
     }
 
     #[inline]
-    pub fn set_cursor_position(&self, cursor_position: LogicalPosition) -> Result<(), ExternalError> {
+    pub fn set_cursor_position(
+        &self,
+        cursor_position: LogicalPosition,
+    ) -> Result<(), ExternalError> {
         let window_position = self.inner_position().unwrap();
         let point = appkit::CGPoint {
             x: (cursor_position.x + window_position.x) as CGFloat,
@@ -548,8 +565,8 @@ impl UnownedWindow {
         // we make it resizable temporalily.
         let curr_mask = unsafe { self.ns_window.styleMask() };
 
-        let required = NSWindowStyleMask::NSTitledWindowMask
-            | NSWindowStyleMask::NSResizableWindowMask;
+        let required =
+            NSWindowStyleMask::NSTitledWindowMask | NSWindowStyleMask::NSResizableWindowMask;
         let needs_temp_mask = !curr_mask.contains(required);
         if needs_temp_mask {
             self.set_style_mask_sync(required);
@@ -566,7 +583,8 @@ impl UnownedWindow {
     }
 
     fn saved_style(&self, shared_state: &mut SharedState) -> NSWindowStyleMask {
-        let base_mask = shared_state.saved_style
+        let base_mask = shared_state
+            .saved_style
             .take()
             .unwrap_or_else(|| unsafe { self.ns_window.styleMask() });
         if shared_state.resizable {
@@ -620,7 +638,7 @@ impl UnownedWindow {
     pub fn set_fullscreen(&self, monitor: Option<RootMonitorHandle>) {
         let shared_state_lock = self.shared_state.lock().unwrap();
         if shared_state_lock.is_simple_fullscreen {
-            return
+            return;
         }
 
         let not_fullscreen = {
@@ -639,12 +657,14 @@ impl UnownedWindow {
             current.is_none()
         };
 
-        unsafe { util::toggle_full_screen_async(
+        unsafe {
+            util::toggle_full_screen_async(
                 *self.ns_window,
                 *self.ns_view,
                 not_fullscreen,
                 Arc::downgrade(&self.shared_state),
-        ) };
+            )
+        };
     }
 
     #[inline]
@@ -664,7 +684,9 @@ impl UnownedWindow {
 
             // If we're in fullscreen mode, we wait to apply decoration changes
             // until we're in `window_did_exit_fullscreen`.
-            if fullscreen { return }
+            if fullscreen {
+                return;
+            }
 
             let new_mask = {
                 let mut new_mask = if decorations {
@@ -727,7 +749,9 @@ impl UnownedWindow {
             let key = IdRef::new(NSString::alloc(nil).init_str("NSScreenNumber"));
             let value = NSDictionary::valueForKey_(desc, *key);
             let display_id = msg_send![value, unsignedIntegerValue];
-            RootMonitorHandle { inner: MonitorHandle::new(display_id) }
+            RootMonitorHandle {
+                inner: MonitorHandle::new(display_id),
+            }
         }
     }
 
@@ -779,7 +803,10 @@ impl WindowExtMacOS for UnownedWindow {
             let is_simple_fullscreen = shared_state_lock.is_simple_fullscreen;
 
             // Do nothing if native fullscreen is active.
-            if is_native_fullscreen || (fullscreen && is_simple_fullscreen) || (!fullscreen && !is_simple_fullscreen) {
+            if is_native_fullscreen
+                || (fullscreen && is_simple_fullscreen)
+                || (!fullscreen && !is_simple_fullscreen)
+            {
                 return false;
             }
 
@@ -799,7 +826,12 @@ impl WindowExtMacOS for UnownedWindow {
                 app.setPresentationOptions_(presentation_options);
 
                 // Hide the titlebar
-                util::toggle_style_mask(*self.ns_window, *self.ns_view, NSWindowStyleMask::NSTitledWindowMask, false);
+                util::toggle_style_mask(
+                    *self.ns_window,
+                    *self.ns_view,
+                    NSWindowStyleMask::NSTitledWindowMask,
+                    false,
+                );
 
                 // Set the window frame to the screen frame size
                 let screen = self.ns_window.screen();
@@ -807,8 +839,18 @@ impl WindowExtMacOS for UnownedWindow {
                 NSWindow::setFrame_display_(*self.ns_window, screen_frame, YES);
 
                 // Fullscreen windows can't be resized, minimized, or moved
-                util::toggle_style_mask(*self.ns_window, *self.ns_view, NSWindowStyleMask::NSMiniaturizableWindowMask, false);
-                util::toggle_style_mask(*self.ns_window, *self.ns_view, NSWindowStyleMask::NSResizableWindowMask, false);
+                util::toggle_style_mask(
+                    *self.ns_window,
+                    *self.ns_view,
+                    NSWindowStyleMask::NSMiniaturizableWindowMask,
+                    false,
+                );
+                util::toggle_style_mask(
+                    *self.ns_window,
+                    *self.ns_view,
+                    NSWindowStyleMask::NSResizableWindowMask,
+                    false,
+                );
                 NSWindow::setMovable_(*self.ns_window, NO);
 
                 true

src/platform_impl/macos/window_delegate.rs

@@ -1,15 +1,28 @@
-use std::{f64, os::raw::c_void, sync::{Arc, Weak}};
+use std::{
+    f64,
+    os::raw::c_void,
+    sync::{Arc, Weak},
+};
 
 use cocoa::{
-    appkit::{self, NSView, NSWindow}, base::{id, nil},
+    appkit::{self, NSView, NSWindow},
+    base::{id, nil},
     foundation::NSAutoreleasePool,
 };
-use objc::{runtime::{Class, Object, Sel, BOOL, YES, NO}, declare::ClassDecl};
+use objc::{
+    declare::ClassDecl,
+    runtime::{Class, Object, Sel, BOOL, NO, YES},
+};
 
-use crate::{dpi::LogicalSize, event::{Event, WindowEvent}, window::WindowId};
-use crate::platform_impl::platform::{
-    app_state::AppState, util::{self, IdRef},
+use crate::{
+    dpi::LogicalSize,
+    event::{Event, WindowEvent},
+    platform_impl::platform::{
+        app_state::AppState,
+        util::{self, IdRef},
         window::{get_window_id, UnownedWindow},
+    },
+    window::WindowId,
 };
 
 pub struct WindowDelegateState {
@@ -33,10 +46,7 @@ pub struct WindowDelegateState {
 }
 
 impl WindowDelegateState {
-    pub fn new(
-        window: &Arc<UnownedWindow>,
-        initial_fullscreen: bool,
-    ) -> Self {
+    pub fn new(window: &Arc<UnownedWindow>, initial_fullscreen: bool) -> Self {
         let dpi_factor = window.hidpi_factor();
 
         let mut delegate_state = WindowDelegateState {
@@ -57,11 +67,10 @@ impl WindowDelegateState {
     }
 
     fn with_window<F, T>(&mut self, callback: F) -> Option<T>
-        where F: FnOnce(&UnownedWindow) -> T
+    where
+        F: FnOnce(&UnownedWindow) -> T,
     {
-        self.window
-            .upgrade()
-            .map(|ref window| callback(window))
+        self.window.upgrade().map(|ref window| callback(window))
     }
 
     pub fn emit_event(&mut self, event: WindowEvent) {
@@ -100,7 +109,7 @@ pub fn new_delegate(window: &Arc<UnownedWindow>, initial_fullscreen: bool) -> Id
         // This is free'd in `dealloc`
         let state_ptr = Box::into_raw(Box::new(state)) as *mut c_void;
         let delegate: id = msg_send![WINDOW_DELEGATE_CLASS.0, alloc];
-        IdRef::new(msg_send![delegate, initWithWinit:state_ptr])
+        IdRef::new(msg_send![delegate, initWithWinit: state_ptr])
     }
 }
 
@@ -113,83 +122,81 @@ lazy_static! {
         let superclass = class!(NSResponder);
         let mut decl = ClassDecl::new("WinitWindowDelegate", superclass).unwrap();
 
-        decl.add_method(
-            sel!(dealloc),
-            dealloc as extern fn(&Object, Sel),
-        );
+        decl.add_method(sel!(dealloc), dealloc as extern "C" fn(&Object, Sel));
         decl.add_method(
             sel!(initWithWinit:),
-            init_with_winit as extern fn(&Object, Sel, *mut c_void) -> id,
+            init_with_winit as extern "C" fn(&Object, Sel, *mut c_void) -> id,
         );
 
         decl.add_method(
             sel!(windowShouldClose:),
-            window_should_close as extern fn(&Object, Sel, id) -> BOOL,
+            window_should_close as extern "C" fn(&Object, Sel, id) -> BOOL,
         );
         decl.add_method(
             sel!(windowWillClose:),
-            window_will_close as extern fn(&Object, Sel, id),
+            window_will_close as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(windowDidResize:),
-            window_did_resize as extern fn(&Object, Sel, id),
+            window_did_resize as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(windowDidMove:),
-            window_did_move as extern fn(&Object, Sel, id));
+            window_did_move as extern "C" fn(&Object, Sel, id),
+        );
         decl.add_method(
             sel!(windowDidChangeScreen:),
-            window_did_change_screen as extern fn(&Object, Sel, id),
+            window_did_change_screen as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(windowDidChangeBackingProperties:),
-            window_did_change_backing_properties as extern fn(&Object, Sel, id),
+            window_did_change_backing_properties as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(windowDidBecomeKey:),
-            window_did_become_key as extern fn(&Object, Sel, id),
+            window_did_become_key as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(windowDidResignKey:),
-            window_did_resign_key as extern fn(&Object, Sel, id),
+            window_did_resign_key as extern "C" fn(&Object, Sel, id),
         );
 
         decl.add_method(
             sel!(draggingEntered:),
-            dragging_entered as extern fn(&Object, Sel, id) -> BOOL,
+            dragging_entered as extern "C" fn(&Object, Sel, id) -> BOOL,
         );
         decl.add_method(
             sel!(prepareForDragOperation:),
-            prepare_for_drag_operation as extern fn(&Object, Sel, id) -> BOOL,
+            prepare_for_drag_operation as extern "C" fn(&Object, Sel, id) -> BOOL,
         );
         decl.add_method(
             sel!(performDragOperation:),
-            perform_drag_operation as extern fn(&Object, Sel, id) -> BOOL,
+            perform_drag_operation as extern "C" fn(&Object, Sel, id) -> BOOL,
         );
         decl.add_method(
             sel!(concludeDragOperation:),
-            conclude_drag_operation as extern fn(&Object, Sel, id),
+            conclude_drag_operation as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(draggingExited:),
-            dragging_exited as extern fn(&Object, Sel, id),
+            dragging_exited as extern "C" fn(&Object, Sel, id),
         );
 
         decl.add_method(
             sel!(windowDidEnterFullScreen:),
-            window_did_enter_fullscreen as extern fn(&Object, Sel, id),
+            window_did_enter_fullscreen as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(windowWillEnterFullScreen:),
-            window_will_enter_fullscreen as extern fn(&Object, Sel, id),
+            window_will_enter_fullscreen as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(windowDidExitFullScreen:),
-            window_did_exit_fullscreen as extern fn(&Object, Sel, id),
+            window_did_exit_fullscreen as extern "C" fn(&Object, Sel, id),
         );
         decl.add_method(
             sel!(windowDidFailToEnterFullScreen:),
-            window_did_fail_to_enter_fullscreen as extern fn(&Object, Sel, id),
+            window_did_fail_to_enter_fullscreen as extern "C" fn(&Object, Sel, id),
         );
 
         decl.add_ivar::<*mut c_void>("winitState");
@@ -207,47 +214,47 @@ fn with_state<F: FnOnce(&mut WindowDelegateState) -> T, T>(this: &Object, callba
     callback(state_ptr);
 }
 
-extern fn dealloc(this: &Object, _sel: Sel) {
+extern "C" fn dealloc(this: &Object, _sel: Sel) {
     with_state(this, |state| unsafe {
         Box::from_raw(state as *mut WindowDelegateState);
     });
 }
 
-extern fn init_with_winit(this: &Object, _sel: Sel, state: *mut c_void) -> id {
+extern "C" fn init_with_winit(this: &Object, _sel: Sel, state: *mut c_void) -> id {
     unsafe {
         let this: id = msg_send![this, init];
         if this != nil {
             (*this).set_ivar("winitState", state);
             with_state(&*this, |state| {
-                let () = msg_send![*state.ns_window, setDelegate:this];
+                let () = msg_send![*state.ns_window, setDelegate: this];
             });
         }
         this
     }
 }
 
-extern fn window_should_close(this: &Object, _: Sel, _: id) -> BOOL {
+extern "C" fn window_should_close(this: &Object, _: Sel, _: id) -> BOOL {
     trace!("Triggered `windowShouldClose:`");
     with_state(this, |state| state.emit_event(WindowEvent::CloseRequested));
     trace!("Completed `windowShouldClose:`");
     NO
 }
 
-extern fn window_will_close(this: &Object, _: Sel, _: id) {
+extern "C" fn window_will_close(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowWillClose:`");
     with_state(this, |state| unsafe {
         // `setDelegate:` retains the previous value and then autoreleases it
         let pool = NSAutoreleasePool::new(nil);
         // Since El Capitan, we need to be careful that delegate methods can't
         // be called after the window closes.
-        let () = msg_send![*state.ns_window, setDelegate:nil];
+        let () = msg_send![*state.ns_window, setDelegate: nil];
         pool.drain();
         state.emit_event(WindowEvent::Destroyed);
     });
     trace!("Completed `windowWillClose:`");
 }
 
-extern fn window_did_resize(this: &Object, _: Sel, _: id) {
+extern "C" fn window_did_resize(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidResize:`");
     with_state(this, |state| {
         state.emit_resize_event();
@@ -257,7 +264,7 @@ extern fn window_did_resize(this: &Object, _: Sel, _: id) {
 }
 
 // This won't be triggered if the move was part of a resize.
-extern fn window_did_move(this: &Object, _: Sel, _: id) {
+extern "C" fn window_did_move(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidMove:`");
     with_state(this, |state| {
         state.emit_move_event();
@@ -265,12 +272,10 @@ extern fn window_did_move(this: &Object, _: Sel, _: id) {
     trace!("Completed `windowDidMove:`");
 }
 
-extern fn window_did_change_screen(this: &Object, _: Sel, _: id) {
+extern "C" fn window_did_change_screen(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidChangeScreen:`");
     with_state(this, |state| {
-        let dpi_factor = unsafe {
-            NSWindow::backingScaleFactor(*state.ns_window)
-         } as f64;
+        let dpi_factor = unsafe { NSWindow::backingScaleFactor(*state.ns_window) } as f64;
         if state.previous_dpi_factor != dpi_factor {
             state.previous_dpi_factor = dpi_factor;
             state.emit_event(WindowEvent::HiDpiFactorChanged(dpi_factor));
@@ -281,12 +286,10 @@ extern fn window_did_change_screen(this: &Object, _: Sel, _: id) {
 }
 
 // This will always be called before `window_did_change_screen`.
-extern fn window_did_change_backing_properties(this: &Object, _:Sel, _:id) {
+extern "C" fn window_did_change_backing_properties(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidChangeBackingProperties:`");
     with_state(this, |state| {
-        let dpi_factor = unsafe {
-            NSWindow::backingScaleFactor(*state.ns_window)
-        } as f64;
+        let dpi_factor = unsafe { NSWindow::backingScaleFactor(*state.ns_window) } as f64;
         if state.previous_dpi_factor != dpi_factor {
             state.previous_dpi_factor = dpi_factor;
             state.emit_event(WindowEvent::HiDpiFactorChanged(dpi_factor));
@@ -296,7 +299,7 @@ extern fn window_did_change_backing_properties(this: &Object, _:Sel, _:id) {
     trace!("Completed `windowDidChangeBackingProperties:`");
 }
 
-extern fn window_did_become_key(this: &Object, _: Sel, _: id) {
+extern "C" fn window_did_become_key(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidBecomeKey:`");
     with_state(this, |state| {
         // TODO: center the cursor if the window had mouse grab when it
@@ -306,7 +309,7 @@ extern fn window_did_become_key(this: &Object, _: Sel, _: id) {
     trace!("Completed `windowDidBecomeKey:`");
 }
 
-extern fn window_did_resign_key(this: &Object, _: Sel, _: id) {
+extern "C" fn window_did_resign_key(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidResignKey:`");
     with_state(this, |state| {
         state.emit_event(WindowEvent::Focused(false));
@@ -315,11 +318,10 @@ extern fn window_did_resign_key(this: &Object, _: Sel, _: id) {
 }
 
 /// Invoked when the dragged image enters destination bounds or frame
-extern fn dragging_entered(this: &Object, _: Sel, sender: id) -> BOOL {
+extern "C" fn dragging_entered(this: &Object, _: Sel, sender: id) -> BOOL {
     trace!("Triggered `draggingEntered:`");
 
-    use cocoa::appkit::NSPasteboard;
-    use cocoa::foundation::NSFastEnumeration;
+    use cocoa::{appkit::NSPasteboard, foundation::NSFastEnumeration};
     use std::path::PathBuf;
 
     let pb: id = unsafe { msg_send![sender, draggingPasteboard] };
@@ -337,25 +339,24 @@ extern fn dragging_entered(this: &Object, _: Sel, sender: id) -> BOOL {
                 state.emit_event(WindowEvent::HoveredFile(PathBuf::from(path)));
             });
         }
-    };
+    }
 
     trace!("Completed `draggingEntered:`");
     YES
 }
 
 /// Invoked when the image is released
-extern fn prepare_for_drag_operation(_: &Object, _: Sel, _: id) -> BOOL {
+extern "C" fn prepare_for_drag_operation(_: &Object, _: Sel, _: id) -> BOOL {
     trace!("Triggered `prepareForDragOperation:`");
     trace!("Completed `prepareForDragOperation:`");
     YES
 }
 
 /// Invoked after the released image has been removed from the screen
-extern fn perform_drag_operation(this: &Object, _: Sel, sender: id) -> BOOL {
+extern "C" fn perform_drag_operation(this: &Object, _: Sel, sender: id) -> BOOL {
     trace!("Triggered `performDragOperation:`");
 
-    use cocoa::appkit::NSPasteboard;
-    use cocoa::foundation::NSFastEnumeration;
+    use cocoa::{appkit::NSPasteboard, foundation::NSFastEnumeration};
     use std::path::PathBuf;
 
     let pb: id = unsafe { msg_send![sender, draggingPasteboard] };
@@ -373,38 +374,42 @@ extern fn perform_drag_operation(this: &Object, _: Sel, sender: id) -> BOOL {
                 state.emit_event(WindowEvent::DroppedFile(PathBuf::from(path)));
             });
         }
-    };
+    }
 
     trace!("Completed `performDragOperation:`");
     YES
 }
 
 /// Invoked when the dragging operation is complete
-extern fn conclude_drag_operation(_: &Object, _: Sel, _: id) {
+extern "C" fn conclude_drag_operation(_: &Object, _: Sel, _: id) {
     trace!("Triggered `concludeDragOperation:`");
     trace!("Completed `concludeDragOperation:`");
 }
 
 /// Invoked when the dragging operation is cancelled
-extern fn dragging_exited(this: &Object, _: Sel, _: id) {
+extern "C" fn dragging_exited(this: &Object, _: Sel, _: id) {
     trace!("Triggered `draggingExited:`");
-    with_state(this, |state| state.emit_event(WindowEvent::HoveredFileCancelled));
+    with_state(this, |state| {
+        state.emit_event(WindowEvent::HoveredFileCancelled)
+    });
     trace!("Completed `draggingExited:`");
 }
 
 /// Invoked when before enter fullscreen
-extern fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
+extern "C" fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowWillEnterFullscreen:`");
-    with_state(this, |state| state.with_window(|window| {
+    with_state(this, |state| {
+        state.with_window(|window| {
             trace!("Locked shared state in `window_will_enter_fullscreen`");
             window.shared_state.lock().unwrap().maximized = window.is_zoomed();
             trace!("Unlocked shared state in `window_will_enter_fullscreen`");
-    }));
+        })
+    });
     trace!("Completed `windowWillEnterFullscreen:`");
 }
 
 /// Invoked when entered fullscreen
-extern fn window_did_enter_fullscreen(this: &Object, _: Sel, _: id) {
+extern "C" fn window_did_enter_fullscreen(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidEnterFullscreen:`");
     with_state(this, |state| {
         state.with_window(|window| {
@@ -419,11 +424,13 @@ extern fn window_did_enter_fullscreen(this: &Object, _: Sel, _: id) {
 }
 
 /// Invoked when exited fullscreen
-extern fn window_did_exit_fullscreen(this: &Object, _: Sel, _: id) {
+extern "C" fn window_did_exit_fullscreen(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidExitFullscreen:`");
-    with_state(this, |state| state.with_window(|window| {
+    with_state(this, |state| {
+        state.with_window(|window| {
             window.restore_state_from_fullscreen();
-    }));
+        })
+    });
     trace!("Completed `windowDidExitFullscreen:`");
 }
 
@@ -443,15 +450,17 @@ extern fn window_did_exit_fullscreen(this: &Object, _: Sel, _: id) {
 /// due to being in the midst of handling some other animation or user gesture.
 /// This method indicates that there was an error, and you should clean up any
 /// work you may have done to prepare to enter full-screen mode.
-extern fn window_did_fail_to_enter_fullscreen(this: &Object, _: Sel, _: id) {
+extern "C" fn window_did_fail_to_enter_fullscreen(this: &Object, _: Sel, _: id) {
     trace!("Triggered `windowDidFailToEnterFullscreen:`");
     with_state(this, |state| {
         if state.initial_fullscreen {
-            let _: () = unsafe { msg_send![*state.ns_window,
+            let _: () = unsafe {
+                msg_send![*state.ns_window,
                     performSelector:sel!(toggleFullScreen:)
                     withObject:nil
                     afterDelay: 0.5
-            ] };
+                ]
+            };
         } else {
             state.with_window(|window| window.restore_state_from_fullscreen());
         }

src/platform_impl/mod.rs

@@ -1,26 +1,40 @@
 pub use self::platform::*;
 
 #[cfg(target_os = "windows")]
-#[path="windows/mod.rs"]
+#[path = "windows/mod.rs"]
 mod platform;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
-#[path="linux/mod.rs"]
+#[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")]
-#[path="macos/mod.rs"]
+#[path = "macos/mod.rs"]
 mod platform;
 #[cfg(target_os = "android")]
-#[path="android/mod.rs"]
+#[path = "android/mod.rs"]
 mod platform;
 #[cfg(target_os = "ios")]
-#[path="ios/mod.rs"]
+#[path = "ios/mod.rs"]
 mod platform;
 #[cfg(target_os = "emscripten")]
-#[path="emscripten/mod.rs"]
+#[path = "emscripten/mod.rs"]
 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 = "netbsd"), not(target_os = "openbsd"),
-  not(target_os = "emscripten")))]
+#[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 = "netbsd"),
+    not(target_os = "openbsd"),
+    not(target_os = "emscripten")
+))]
 compile_error!("The platform you're compiling for is not supported by winit");

src/platform_impl/windows/dpi.rs

@@ -1,45 +1,43 @@
 #![allow(non_snake_case, unused_unsafe)]
 
-use std::mem;
-use std::os::raw::c_void;
-use std::sync::{Once, ONCE_INIT};
+use std::{
+    mem,
+    os::raw::c_void,
+    sync::{Once, ONCE_INIT},
+};
 
-use winapi::shared::minwindef::{BOOL, UINT, FALSE};
-use winapi::shared::windef::{
-    DPI_AWARENESS_CONTEXT,
-    DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE,
-    HMONITOR,
-    HWND,
-};
-use winapi::shared::winerror::S_OK;
-use winapi::um::libloaderapi::{GetProcAddress, LoadLibraryA};
-use winapi::um::shellscalingapi::{
-    MDT_EFFECTIVE_DPI,
-    MONITOR_DPI_TYPE,
-    PROCESS_DPI_AWARENESS,
+use winapi::{
+    shared::{
+        minwindef::{BOOL, FALSE, UINT},
+        windef::{DPI_AWARENESS_CONTEXT, DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE, HMONITOR, HWND},
+        winerror::S_OK,
+    },
+    um::{
+        libloaderapi::{GetProcAddress, LoadLibraryA},
+        shellscalingapi::{
+            MDT_EFFECTIVE_DPI, MONITOR_DPI_TYPE, PROCESS_DPI_AWARENESS,
             PROCESS_PER_MONITOR_DPI_AWARE,
+        },
+        wingdi::{GetDeviceCaps, LOGPIXELSX},
+        winnt::{HRESULT, LPCSTR},
+        winuser::{self, MONITOR_DEFAULTTONEAREST},
+    },
 };
-use winapi::um::wingdi::{GetDeviceCaps, LOGPIXELSX};
-use winapi::um::winnt::{HRESULT, LPCSTR};
-use winapi::um::winuser::{self, MONITOR_DEFAULTTONEAREST};
 
 const DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2: DPI_AWARENESS_CONTEXT = -4isize as _;
 
-type SetProcessDPIAware = unsafe extern "system" fn () -> BOOL;
-type SetProcessDpiAwareness = unsafe extern "system" fn (
-    value: PROCESS_DPI_AWARENESS,
-) -> HRESULT;
-type SetProcessDpiAwarenessContext = unsafe extern "system" fn (
-    value: DPI_AWARENESS_CONTEXT,
-) -> BOOL;
-type GetDpiForWindow = unsafe extern "system" fn (hwnd: HWND) -> UINT;
-type GetDpiForMonitor = unsafe extern "system" fn (
+type SetProcessDPIAware = unsafe extern "system" fn() -> BOOL;
+type SetProcessDpiAwareness = unsafe extern "system" fn(value: PROCESS_DPI_AWARENESS) -> HRESULT;
+type SetProcessDpiAwarenessContext =
+    unsafe extern "system" fn(value: DPI_AWARENESS_CONTEXT) -> BOOL;
+type GetDpiForWindow = unsafe extern "system" fn(hwnd: HWND) -> UINT;
+type GetDpiForMonitor = unsafe extern "system" fn(
     hmonitor: HMONITOR,
     dpi_type: MONITOR_DPI_TYPE,
     dpi_x: *mut UINT,
     dpi_y: *mut UINT,
 ) -> HRESULT;
-type EnableNonClientDpiScaling = unsafe extern "system" fn (hwnd: HWND) -> BOOL;
+type EnableNonClientDpiScaling = unsafe extern "system" fn(hwnd: HWND) -> BOOL;
 
 // Helper function to dynamically load function pointer.
 // `library` and `function` must be zero-terminated.
@@ -65,53 +63,48 @@ macro_rules! get_function {
     ($lib:expr, $func:ident) => {
         get_function_impl(concat!($lib, '\0'), concat!(stringify!($func), '\0'))
             .map(|f| unsafe { mem::transmute::<*const _, $func>(f) })
-    }
+    };
 }
 
 lazy_static! {
-    static ref GET_DPI_FOR_WINDOW: Option<GetDpiForWindow> = get_function!(
-        "user32.dll",
-        GetDpiForWindow
-    );
-    static ref GET_DPI_FOR_MONITOR: Option<GetDpiForMonitor> = get_function!(
-        "shcore.dll",
-        GetDpiForMonitor
-    );
-    static ref ENABLE_NON_CLIENT_DPI_SCALING: Option<EnableNonClientDpiScaling> = get_function!(
-        "user32.dll",
-        EnableNonClientDpiScaling
-    );
+    static ref GET_DPI_FOR_WINDOW: Option<GetDpiForWindow> =
+        get_function!("user32.dll", GetDpiForWindow);
+    static ref GET_DPI_FOR_MONITOR: Option<GetDpiForMonitor> =
+        get_function!("shcore.dll", GetDpiForMonitor);
+    static ref ENABLE_NON_CLIENT_DPI_SCALING: Option<EnableNonClientDpiScaling> =
+        get_function!("user32.dll", EnableNonClientDpiScaling);
 }
 
 pub fn become_dpi_aware(enable: bool) {
-    if !enable { return; }
+    if !enable {
+        return;
+    }
     static ENABLE_DPI_AWARENESS: Once = ONCE_INIT;
-    ENABLE_DPI_AWARENESS.call_once(|| { unsafe {
-        if let Some(SetProcessDpiAwarenessContext) = get_function!(
-            "user32.dll",
-            SetProcessDpiAwarenessContext
-        ) {
+    ENABLE_DPI_AWARENESS.call_once(|| {
+        unsafe {
+            if let Some(SetProcessDpiAwarenessContext) =
+                get_function!("user32.dll", SetProcessDpiAwarenessContext)
+            {
                 // We are on Windows 10 Anniversary Update (1607) or later.
                 if SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2)
-            == FALSE {
+                    == FALSE
+                {
                     // V2 only works with Windows 10 Creators Update (1703). Try using the older
                     // V1 if we can't set V2.
                     SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE);
                 }
-        } else if let Some(SetProcessDpiAwareness) = get_function!(
-            "shcore.dll",
-            SetProcessDpiAwareness
-        ) {
+            } else if let Some(SetProcessDpiAwareness) =
+                get_function!("shcore.dll", SetProcessDpiAwareness)
+            {
                 // We are on Windows 8.1 or later.
                 SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE);
-        } else if let Some(SetProcessDPIAware) = get_function!(
-            "user32.dll",
-            SetProcessDPIAware
-        ) {
+            } else if let Some(SetProcessDPIAware) = get_function!("user32.dll", SetProcessDPIAware)
+            {
                 // We are on Vista or later.
                 SetProcessDPIAware();
             }
-    } });
+        }
+    });
 }
 
 pub fn enable_non_client_dpi_scaling(hwnd: HWND) {
@@ -132,7 +125,7 @@ pub fn get_monitor_dpi(hmonitor: HMONITOR) -> Option<u32> {
                 // MSDN says that "the values of *dpiX and *dpiY are identical. You only need to
                 // record one of the values to determine the DPI and respond appropriately".
                 // https://msdn.microsoft.com/en-us/library/windows/desktop/dn280510(v=vs.85).aspx
-                return Some(dpi_x as u32)
+                return Some(dpi_x as u32);
             }
         }
     }

src/platform_impl/windows/drop_handler.rs

@@ -1,23 +1,31 @@
-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 std::{
+    ffi::OsString,
+    mem,
+    os::windows::ffi::OsStringExt,
+    path::PathBuf,
+    ptr,
+    sync::atomic::{AtomicUsize, Ordering},
+};
 
-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 winapi::{
+    ctypes::c_void,
+    shared::{
+        guiddef::REFIID,
+        minwindef::{DWORD, MAX_PATH, UINT, ULONG},
+        windef::{HWND, POINTL},
+        winerror::S_OK,
+    },
+    um::{
+        objidl::IDataObject,
+        oleidl::{IDropTarget, IDropTargetVtbl, DROPEFFECT_COPY, DROPEFFECT_NONE},
+        shellapi, unknwnbase,
+        winnt::HRESULT,
+    },
+};
 
 use crate::platform_impl::platform::WindowId;
 
-use crate::event::Event;
-use crate::window::WindowId as SuperWindowId;
+use crate::{event::Event, window::WindowId as SuperWindowId};
 
 #[repr(C)]
 pub struct FileDropHandlerData {
@@ -26,7 +34,7 @@ pub struct FileDropHandlerData {
     window: HWND,
     send_event: Box<dyn Fn(Event<()>)>,
     cursor_effect: DWORD,
-    hovered_is_valid: bool, // If the currently hovered item is not valid there must not be any `HoveredFileCancelled` emitted
+    hovered_is_valid: bool, /* If the currently hovered item is not valid there must not be any `HoveredFileCancelled` emitted */
 }
 
 pub struct FileDropHandler {
@@ -155,16 +163,25 @@ impl FileDropHandler {
         &mut *(this as *mut _)
     }
 
-    unsafe fn iterate_filenames<F>(data_obj: *const IDataObject, callback: F) -> Option<shellapi::HDROP>
+    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;
+        use winapi::{
+            ctypes::wchar_t,
+            shared::{
+                winerror::{DV_E_FORMATETC, SUCCEEDED},
+                wtypes::{CLIPFORMAT, DVASPECT_CONTENT},
+            },
+            um::{
+                objidl::{FORMATETC, TYMED_HGLOBAL},
+                shellapi::DragQueryFileW,
+                winuser::CF_HDROP,
+            },
+        };
 
         let mut drop_format = FORMATETC {
             cfFormat: CF_HDROP as CLIPFORMAT,

src/platform_impl/windows/event.rs

@@ -1,16 +1,19 @@
-use std::{char, ptr};
-use std::os::raw::c_int;
-use std::sync::atomic::{AtomicBool, AtomicPtr, Ordering};
+use std::{
+    char,
+    os::raw::c_int,
+    ptr,
+    sync::atomic::{AtomicBool, AtomicPtr, Ordering},
+};
 
-use crate::event::{ScanCode, ModifiersState, VirtualKeyCode};
+use crate::event::{ModifiersState, ScanCode, VirtualKeyCode};
 
-use winapi::shared::minwindef::{WPARAM, LPARAM, UINT, HKL, HKL__};
-use winapi::um::winuser;
+use winapi::{
+    shared::minwindef::{HKL, HKL__, LPARAM, UINT, WPARAM},
+    um::winuser,
+};
 
 fn key_pressed(vkey: c_int) -> bool {
-    unsafe {
-        (winuser::GetKeyState(vkey) & (1 << 15)) == (1 << 15)
-    }
+    unsafe { (winuser::GetKeyState(vkey) & (1 << 15)) == (1 << 15) }
 }
 
 pub fn get_key_mods() -> ModifiersState {
@@ -26,9 +29,19 @@ pub fn get_key_mods() -> ModifiersState {
 
 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);
+    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())
+        char::decode_utf16(unicode_bytes.into_iter().cloned())
+            .next()
+            .and_then(|c| c.ok())
     } else {
         None
     }
@@ -239,7 +252,7 @@ pub fn vkey_to_winit_vkey(vkey: c_int) -> Option<VirtualKeyCode> {
         winuser::VK_OEM_5 => map_text_keys(vkey),
         winuser::VK_OEM_6 => map_text_keys(vkey),
         winuser::VK_OEM_7 => map_text_keys(vkey),
-        /*winuser::VK_OEM_8 => Some(VirtualKeyCode::Oem_8), */
+        /* winuser::VK_OEM_8 => Some(VirtualKeyCode::Oem_8), */
         winuser::VK_OEM_102 => Some(VirtualKeyCode::OEM102),
         /*winuser::VK_PROCESSKEY => Some(VirtualKeyCode::Processkey),
         winuser::VK_PACKET => Some(VirtualKeyCode::Packet),
@@ -252,28 +265,36 @@ pub fn vkey_to_winit_vkey(vkey: c_int) -> Option<VirtualKeyCode> {
         winuser::VK_NONAME => Some(VirtualKeyCode::Noname),
         winuser::VK_PA1 => Some(VirtualKeyCode::Pa1),
         winuser::VK_OEM_CLEAR => Some(VirtualKeyCode::Oem_clear),*/
-        _ => None
+        _ => None,
     }
 }
 
-pub fn handle_extended_keys(vkey: c_int, mut scancode: UINT, extended: bool) -> Option<(c_int, UINT)> {
+pub fn handle_extended_keys(
+    vkey: c_int,
+    mut scancode: UINT,
+    extended: bool,
+) -> Option<(c_int, UINT)> {
     // Welcome to hell https://blog.molecular-matters.com/2011/09/05/properly-handling-keyboard-input/
     let vkey = match vkey {
-        winuser::VK_SHIFT => unsafe { winuser::MapVirtualKeyA(
-            scancode,
-            winuser::MAPVK_VSC_TO_VK_EX,
-        ) as _ },
-        winuser::VK_CONTROL => if extended {
+        winuser::VK_SHIFT => unsafe {
+            winuser::MapVirtualKeyA(scancode, winuser::MAPVK_VSC_TO_VK_EX) as _
+        },
+        winuser::VK_CONTROL => {
+            if extended {
                 winuser::VK_RCONTROL
             } else {
                 winuser::VK_LCONTROL
+            }
         },
-        winuser::VK_MENU => if extended {
+        winuser::VK_MENU => {
+            if extended {
                 winuser::VK_RMENU
             } else {
                 winuser::VK_LMENU
+            }
         },
-        _ => match scancode {
+        _ => {
+            match scancode {
                 // This is only triggered when using raw input. Without this check, we get two events whenever VK_PAUSE is
                 // pressed, the first one having scancode 0x1D but vkey VK_PAUSE...
                 0x1D if vkey == winuser::VK_PAUSE => return None,
@@ -289,12 +310,16 @@ pub fn handle_extended_keys(vkey: c_int, mut scancode: UINT, extended: bool) ->
                     }
                 },
                 _ => vkey,
+            }
         },
     };
     Some((vkey, scancode))
 }
 
-pub fn process_key_params(wparam: WPARAM, lparam: LPARAM) -> Option<(ScanCode, Option<VirtualKeyCode>)> {
+pub fn process_key_params(
+    wparam: WPARAM,
+    lparam: LPARAM,
+) -> Option<(ScanCode, Option<VirtualKeyCode>)> {
     let scancode = ((lparam >> 16) & 0xff) as UINT;
     let extended = (lparam & 0x01000000) != 0;
     handle_extended_keys(wparam as _, scancode, extended)
@@ -304,7 +329,9 @@ pub fn process_key_params(wparam: WPARAM, lparam: LPARAM) -> Option<(ScanCode, O
 // This is needed as windows doesn't properly distinguish
 // some virtual key codes for different keyboard layouts
 fn map_text_keys(win_virtual_key: i32) -> Option<VirtualKeyCode> {
-    let char_key = unsafe { winuser::MapVirtualKeyA(win_virtual_key as u32, winuser::MAPVK_VK_TO_CHAR) } & 0x7FFF;
+    let char_key =
+        unsafe { winuser::MapVirtualKeyA(win_virtual_key as u32, winuser::MAPVK_VK_TO_CHAR) }
+            & 0x7FFF;
     match char::from_u32(char_key) {
         Some(';') => Some(VirtualKeyCode::Semicolon),
         Some('/') => Some(VirtualKeyCode::Slash),
@@ -313,6 +340,6 @@ fn map_text_keys(win_virtual_key: i32) -> Option<VirtualKeyCode> {
         Some(']') => Some(VirtualKeyCode::RBracket),
         Some('\'') => Some(VirtualKeyCode::Apostrophe),
         Some('\\') => Some(VirtualKeyCode::Backslash),
-        _ => None
+        _ => None,
     }
 }

src/platform_impl/windows/icon.rs

@@ -1,13 +1,15 @@
-use std::{mem, ptr, io};
-use std::os::windows::ffi::OsStrExt;
-use std::path::Path;
+use std::{io, mem, os::windows::ffi::OsStrExt, path::Path, ptr};
 
-use winapi::ctypes::{c_int, wchar_t};
-use winapi::shared::minwindef::{BYTE, LPARAM, WPARAM};
-use winapi::shared::windef::{HICON, HWND};
-use winapi::um::winuser;
+use winapi::{
+    ctypes::{c_int, wchar_t},
+    shared::{
+        minwindef::{BYTE, LPARAM, WPARAM},
+        windef::{HICON, HWND},
+    },
+    um::winuser,
+};
 
-use crate::icon::{Pixel, PIXEL_SIZE, Icon};
+use crate::icon::{Icon, Pixel, PIXEL_SIZE};
 
 impl Pixel {
     fn to_bgra(&mut self) {
@@ -103,11 +105,6 @@ impl Drop for WinIcon {
 
 pub fn unset_for_window(hwnd: HWND, icon_type: IconType) {
     unsafe {
-        winuser::SendMessageW(
-            hwnd,
-            winuser::WM_SETICON,
-            icon_type as WPARAM,
-            0 as LPARAM,
-        );
+        winuser::SendMessageW(hwnd, winuser::WM_SETICON, icon_type as WPARAM, 0 as LPARAM);
     }
 }

src/platform_impl/windows/mod.rs

@@ -1,14 +1,14 @@
 #![cfg(target_os = "windows")]
 
-use winapi;
-use winapi::shared::windef::HWND;
+use winapi::{self, shared::windef::HWND};
 
-pub use self::event_loop::{EventLoop, EventLoopWindowTarget, EventLoopProxy};
-pub use self::monitor::MonitorHandle;
-pub use self::window::Window;
+pub use self::{
+    event_loop::{EventLoop, EventLoopProxy, EventLoopWindowTarget},
+    monitor::MonitorHandle,
+    window::Window,
+};
 
-use crate::window::Icon;
-use crate::event::DeviceId as RootDeviceId;
+use crate::{event::DeviceId as RootDeviceId, window::Icon};
 
 #[derive(Clone, Default)]
 pub struct PlatformSpecificWindowBuilderAttributes {

src/platform_impl/windows/monitor.rs

@@ -1,16 +1,25 @@
-use winapi::shared::minwindef::{BOOL, DWORD, LPARAM, TRUE, WORD};
-use winapi::shared::windef::{HDC, HMONITOR, HWND, LPRECT, POINT};
-use winapi::um::winnt::LONG;
-use winapi::um::{wingdi, winuser};
+use winapi::{
+    shared::{
+        minwindef::{BOOL, DWORD, LPARAM, TRUE, WORD},
+        windef::{HDC, HMONITOR, HWND, LPRECT, POINT},
+    },
+    um::{wingdi, winnt::LONG, winuser},
+};
 
-use std::collections::{HashSet, VecDeque};
-use std::{io, mem, ptr};
+use std::{
+    collections::{HashSet, VecDeque},
+    io, mem, ptr,
+};
 
 use super::{util, EventLoop};
-use crate::dpi::{PhysicalPosition, PhysicalSize};
-use crate::monitor::VideoMode;
-use crate::platform_impl::platform::dpi::{dpi_to_scale_factor, get_monitor_dpi};
-use crate::platform_impl::platform::window::Window;
+use crate::{
+    dpi::{PhysicalPosition, PhysicalSize},
+    monitor::VideoMode,
+    platform_impl::platform::{
+        dpi::{dpi_to_scale_factor, get_monitor_dpi},
+        window::Window,
+    },
+};
 
 /// Win32 implementation of the main `MonitorHandle` object.
 #[derive(Derivative)]
@@ -69,16 +78,12 @@ pub fn available_monitors() -> VecDeque<MonitorHandle> {
 
 pub fn primary_monitor() -> MonitorHandle {
     const ORIGIN: POINT = POINT { x: 0, y: 0 };
-    let hmonitor = unsafe {
-        winuser::MonitorFromPoint(ORIGIN, winuser::MONITOR_DEFAULTTOPRIMARY)
-    };
+    let hmonitor = unsafe { winuser::MonitorFromPoint(ORIGIN, winuser::MONITOR_DEFAULTTOPRIMARY) };
     MonitorHandle::from_hmonitor(hmonitor)
 }
 
 pub fn current_monitor(hwnd: HWND) -> MonitorHandle {
-    let hmonitor = unsafe {
-        winuser::MonitorFromWindow(hwnd, winuser::MONITOR_DEFAULTTONEAREST)
-    };
+    let hmonitor = unsafe { winuser::MonitorFromWindow(hwnd, winuser::MONITOR_DEFAULTTONEAREST) };
     MonitorHandle::from_hmonitor(hmonitor)
 }