Move iOS and macOS implementations into new apple module (#3756)

Move iOS and macOS implementations to a shared folder called `apple`, to allow
us to reduce the code-duplication between these platforms in the future.

The folder structure is now:
- `src/platform_impl/apple/`
  - `appkit/`
  - `uikit/`
  - `example_shared_file.rs`
  - `mod.rs`

* Add preliminary support for tvOS, watchOS and visionOS
* Reduce duplication in Cargo.toml when specifying dependencies

.github/CODEOWNERS

@@ -2,9 +2,10 @@
 /src/platform/android.rs            @MarijnS95
 /src/platform_impl/android          @MarijnS95
 
-# iOS
+# Apple (AppKit + UIKit)
 /src/platform/ios.rs                @madsmtm
-/src/platform_impl/ios              @madsmtm
+/src/platform/macos.rs              @madsmtm
+/src/platform_impl/apple            @madsmtm
 
 # Unix
 /src/platform_impl/linux/mod.rs     @kchibisov
@@ -17,10 +18,6 @@
 /src/platform/x11.rs                @kchibisov @notgull
 /src/platform_impl/linux/x11        @kchibisov @notgull
 
-# macOS
-/src/platform/macos.rs              @madsmtm
-/src/platform_impl/macos            @madsmtm
-
 # Web
 /src/platform/web.rs                @daxpedda
 /src/platform_impl/web              @daxpedda

Cargo.toml

@@ -102,21 +102,21 @@ softbuffer = { version = "0.4.0", default-features = false, features = [
     "wayland-dlopen",
 ] }
 
+# Android
 [target.'cfg(target_os = "android")'.dependencies]
 android-activity = "0.6.0"
 ndk = { version = "0.9.0", default-features = false }
 
-[target.'cfg(any(target_os = "ios", target_os = "macos"))'.dependencies]
+# AppKit or UIKit
+[target.'cfg(target_vendor = "apple")'.dependencies]
 core-foundation = "0.9.3"
 objc2 = "0.5.2"
 
+# AppKit
 [target.'cfg(target_os = "macos")'.dependencies]
 core-graphics = "0.23.1"
 block2 = "0.5.1"
-
-[target.'cfg(target_os = "macos")'.dependencies.objc2-foundation]
-version = "0.2.2"
-features = [
+objc2-foundation = { version = "0.2.2", features = [
     "block2",
     "dispatch",
     "NSArray",
@@ -134,11 +134,8 @@ features = [
     "NSString",
     "NSThread",
     "NSValue",
-]
-
-[target.'cfg(target_os = "macos")'.dependencies.objc2-app-kit]
-version = "0.2.2"
-features = [
+] }
+objc2-app-kit = { version = "0.2.2", features = [
     "NSAppearance",
     "NSApplication",
     "NSBitmapImageRep",
@@ -165,11 +162,11 @@ features = [
     "NSWindow",
     "NSWindowScripting",
     "NSWindowTabGroup",
-]
+] }
 
-[target.'cfg(target_os = "ios")'.dependencies.objc2-foundation]
-version = "0.2.2"
-features = [
+# UIKit
+[target.'cfg(all(target_vendor = "apple", not(target_os = "macos")))'.dependencies]
+objc2-foundation = { version = "0.2.2", features = [
     "dispatch",
     "NSArray",
     "NSEnumerator",
@@ -179,11 +176,8 @@ features = [
     "NSProcessInfo",
     "NSThread",
     "NSSet",
-]
-
-[target.'cfg(target_os = "ios")'.dependencies.objc2-ui-kit]
-version = "0.2.2"
-features = [
+] }
+objc2-ui-kit = { version = "0.2.2", features = [
     "UIApplication",
     "UIDevice",
     "UIEvent",
@@ -202,14 +196,12 @@ features = [
     "UIView",
     "UIViewController",
     "UIWindow",
-]
+] }
 
+# Windows
 [target.'cfg(target_os = "windows")'.dependencies]
 unicode-segmentation = "1.7.1"
-
-[target.'cfg(target_os = "windows")'.dependencies.windows-sys]
-version = "0.52.0"
-features = [
+windows-sys = { version = "0.52.0", features = [
     "Win32_Devices_HumanInterfaceDevice",
     "Win32_Foundation",
     "Win32_Globalization",
@@ -234,9 +226,10 @@ features = [
     "Win32_UI_Shell",
     "Win32_UI_TextServices",
     "Win32_UI_WindowsAndMessaging",
-]
+] }
 
-[target.'cfg(all(unix, not(any(target_os = "redox", target_family = "wasm", target_os = "android", target_os = "ios", target_os = "macos"))))'.dependencies]
+# Linux
+[target.'cfg(all(unix, not(any(target_os = "redox", target_family = "wasm", target_os = "android", target_vendor = "apple"))))'.dependencies]
 ahash = { version = "0.8.7", features = ["no-rng"], optional = true }
 bytemuck = { version = "1.13.1", default-features = false, optional = true }
 calloop = "0.12.3"
@@ -274,14 +267,14 @@ x11rb = { version = "0.13.0", default-features = false, features = [
 ], optional = true }
 xkbcommon-dl = "0.4.2"
 
+# Orbital
 [target.'cfg(target_os = "redox")'.dependencies]
 orbclient = { version = "0.3.47", default-features = false }
 redox_syscall = "0.4.1"
 
-[target.'cfg(target_family = "wasm")'.dependencies.web_sys]
-package = "web-sys"
-version = "0.3.64"
-features = [
+# Web
+[target.'cfg(target_family = "wasm")'.dependencies]
+web_sys = { package = "web-sys", version = "0.3.64", features = [
     'AbortController',
     'AbortSignal',
     'Blob',
@@ -323,9 +316,7 @@ features = [
     'WheelEvent',
     'Worker',
     'Url',
-]
-
-[target.'cfg(target_family = "wasm")'.dependencies]
+] }
 js-sys = "0.3.64"
 pin-project = "1"
 wasm-bindgen = "0.2"

build.rs

@@ -10,10 +10,9 @@ fn main() {
         android_platform: { target_os = "android" },
         web_platform: { all(target_family = "wasm", target_os = "unknown") },
         macos_platform: { target_os = "macos" },
-        ios_platform: { target_os = "ios" },
+        ios_platform: { all(target_vendor = "apple", not(target_os = "macos")) },
         windows_platform: { target_os = "windows" },
-        apple: { any(target_os = "ios", target_os = "macos") },
-        free_unix: { all(unix, not(apple), not(android_platform), not(target_os = "emscripten")) },
+        free_unix: { all(unix, not(target_vendor = "apple"), not(android_platform), not(target_os = "emscripten")) },
         redox: { target_os = "redox" },
 
         // Native displays.

src/platform_impl/macos/event.rs → src/platform_impl/apple/appkit/event.rs

@@ -7,12 +7,12 @@ use objc2_app_kit::{NSEvent, NSEventModifierFlags, NSEventSubtype, NSEventType};
 use objc2_foundation::{run_on_main, NSPoint};
 use smol_str::SmolStr;
 
+use super::ffi;
 use crate::event::{ElementState, KeyEvent, Modifiers};
 use crate::keyboard::{
     Key, KeyCode, KeyLocation, ModifiersKeys, ModifiersState, NamedKey, NativeKey, NativeKeyCode,
     PhysicalKey,
 };
-use crate::platform_impl::platform::ffi;
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct KeyEventExtra {

src/platform_impl/macos/event_loop.rs → src/platform_impl/apple/appkit/event_loop.rs

@@ -23,6 +23,7 @@ use objc2_foundation::{MainThreadMarker, NSObjectProtocol};
 
 use super::app::WinitApplication;
 use super::app_state::ApplicationDelegate;
+use super::cursor::CustomCursor;
 use super::event::dummy_event;
 use super::monitor::{self, MonitorHandle};
 use super::observer::setup_control_flow_observers;
@@ -31,7 +32,6 @@ use crate::error::EventLoopError;
 use crate::event_loop::{ActiveEventLoop as RootWindowTarget, ControlFlow, DeviceEvents};
 use crate::platform::macos::ActivationPolicy;
 use crate::platform::pump_events::PumpStatus;
-use crate::platform_impl::platform::cursor::CustomCursor;
 use crate::window::{CustomCursor as RootCustomCursor, CustomCursorSource};
 
 #[derive(Default)]

src/platform_impl/macos/util.rs → src/platform_impl/apple/appkit/util.rs

@@ -2,7 +2,8 @@ use tracing::trace;
 
 macro_rules! trace_scope {
     ($s:literal) => {
-        let _crate = $crate::platform_impl::platform::util::TraceGuard::new(module_path!(), $s);
+        let _crate =
+            $crate::platform_impl::platform::appkit::util::TraceGuard::new(module_path!(), $s);
     };
 }
 

src/platform_impl/apple/mod.rs

@@ -0,0 +1,11 @@
+//! Apple/Darwin-specific implementations
+
+#[cfg(target_os = "macos")]
+mod appkit;
+#[cfg(not(target_os = "macos"))]
+mod uikit;
+
+#[cfg(target_os = "macos")]
+pub use self::appkit::*;
+#[cfg(not(target_os = "macos"))]
+pub use self::uikit::*;

src/platform_impl/ios/event_loop.rs → src/platform_impl/apple/uikit/event_loop.rs

@@ -17,12 +17,12 @@ use objc2::{msg_send_id, ClassType};
 use objc2_foundation::{MainThreadMarker, NSString};
 use objc2_ui_kit::{UIApplication, UIApplicationMain, UIDevice, UIScreen, UIUserInterfaceIdiom};
 
+use super::app_state::EventLoopHandler;
 use crate::application::ApplicationHandler;
 use crate::error::EventLoopError;
 use crate::event::Event;
 use crate::event_loop::{ActiveEventLoop as RootActiveEventLoop, ControlFlow, DeviceEvents};
 use crate::platform::ios::Idiom;
-use crate::platform_impl::platform::app_state::EventLoopHandler;
 use crate::window::{CustomCursor, CustomCursorSource};
 
 use super::app_delegate::AppDelegate;

src/platform_impl/ios/monitor.rs → src/platform_impl/apple/uikit/monitor.rs

@@ -9,9 +9,9 @@ use objc2::Message;
 use objc2_foundation::{run_on_main, MainThreadBound, MainThreadMarker, NSInteger};
 use objc2_ui_kit::{UIScreen, UIScreenMode};
 
+use super::app_state;
 use crate::dpi::{PhysicalPosition, PhysicalSize};
 use crate::monitor::VideoModeHandle as RootVideoModeHandle;
-use crate::platform_impl::platform::app_state;
 
 // Workaround for `MainThreadBound` implementing almost no traits
 #[derive(Debug)]

src/platform_impl/ios/view.rs → src/platform_impl/apple/uikit/view.rs

@@ -14,9 +14,9 @@ use objc2_ui_kit::{
 
 use super::app_state::{self, EventWrapper};
 use super::window::WinitUIWindow;
+use super::DEVICE_ID;
 use crate::dpi::PhysicalPosition;
 use crate::event::{Event, Force, Touch, TouchPhase, WindowEvent};
-use crate::platform_impl::platform::DEVICE_ID;
 use crate::window::{WindowAttributes, WindowId as RootWindowId};
 
 pub struct WinitViewState {

src/platform_impl/ios/window.rs → src/platform_impl/apple/uikit/window.rs

@@ -17,15 +17,13 @@ use tracing::{debug, warn};
 use super::app_state::EventWrapper;
 use super::view::WinitView;
 use super::view_controller::WinitViewController;
+use super::{app_state, monitor, ActiveEventLoop, Fullscreen, MonitorHandle};
 use crate::cursor::Cursor;
 use crate::dpi::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize, Position, Size};
 use crate::error::{ExternalError, NotSupportedError, OsError as RootOsError};
 use crate::event::{Event, WindowEvent};
 use crate::icon::Icon;
 use crate::platform::ios::{ScreenEdge, StatusBarStyle, ValidOrientations};
-use crate::platform_impl::platform::{
-    app_state, monitor, ActiveEventLoop, Fullscreen, MonitorHandle,
-};
 use crate::window::{
     CursorGrabMode, ImePurpose, ResizeDirection, Theme, UserAttentionType, WindowAttributes,
     WindowButtons, WindowId as RootWindowId, WindowLevel,

src/platform_impl/mod.rs

@@ -3,12 +3,10 @@ use crate::window::Fullscreen as RootFullscreen;
 
 #[cfg(android_platform)]
 mod android;
-#[cfg(ios_platform)]
-mod ios;
+#[cfg(target_vendor = "apple")]
+mod apple;
 #[cfg(any(x11_platform, wayland_platform))]
 mod linux;
-#[cfg(macos_platform)]
-mod macos;
 #[cfg(orbital_platform)]
 mod orbital;
 #[cfg(web_platform)]
@@ -18,12 +16,10 @@ mod windows;
 
 #[cfg(android_platform)]
 use android as platform;
-#[cfg(ios_platform)]
-use ios as platform;
+#[cfg(target_vendor = "apple")]
+use apple as platform;
 #[cfg(any(x11_platform, wayland_platform))]
 use linux as platform;
-#[cfg(macos_platform)]
-use macos as platform;
 #[cfg(orbital_platform)]
 use orbital as platform;
 #[cfg(web_platform)]