Build via Swift package manager

Package.swift

@@ -0,0 +1,27 @@
+// swift-tools-version:5.7
+import PackageDescription
+
+let package = Package(
+    name: "UIKit",
+    platforms: [.macOS(.v10_15)],
+    products: [
+        .library(name: "UIKit", targets: ["UIKit"])
+    ],
+    dependencies: [
+        .package(path: "./swift-jni"),
+        .package(path: "./SDL"),
+    ],
+    targets: [
+        .target(
+            name: "UIKit",
+            dependencies: [
+                .product(name: "SDL", package: "SDL"),
+                .product(name: "JNI", package: "swift-jni", condition: .when(platforms: [.android])),
+                .target(name: "UIKit_C_API", condition: .when(platforms: [.android])),
+            ],
+            path: "Sources",
+            exclude: ["Mac-Info.plist"]
+        ),
+        .target(name: "UIKit_C_API", path: "UIKit_C_API"),
+    ]
+)

Sources/AVPlayer+Android.swift

@@ -1,3 +1,4 @@
+#if os(Android)
 //
 //  JNIVideo.swift
 //  UIKit
@@ -85,3 +86,4 @@ public func nativeOnVideoError(env: UnsafeMutablePointer<JNIEnv>, cls: JavaObjec
     )
     globalAVPlayer?.onError?(error)
 }
+#endif

Sources/AVPlayerItem+Mac.swift

@@ -1,3 +1,4 @@
+#if os(macOS)
 //
 //  AVPlayerItem+Mac.swift
 //  UIKit
@@ -17,3 +18,4 @@ extension AVPlayerItem {
         return duration.seconds * 1000
     }
 }
+#endif

Sources/AVPlayerLayer+Android.swift

@@ -1,3 +1,4 @@
+#if os(Android)
 //
 //  JNIVideo.swift
 //  UIKit
@@ -51,3 +52,4 @@ public class AVPlayerLayer: JNIObject {
         }
     }
 }
+#endif

Sources/AVPlayerLayer+Mac.swift

@@ -1,3 +1,4 @@
+#if os(macOS)
 //
 //  AVPlayerLayer+Mac.swift
 //  UIKit
@@ -7,7 +8,7 @@
 //
 
 import AVFoundation
-import var SDL_gpu.GPU_FORMAT_RGBA
+internal import var SDL_gpu.GPU_FORMAT_RGBA
 
 public typealias AVPlayer = AVFoundation.AVPlayer
 
@@ -123,3 +124,4 @@ public final class AVPlayerLayer: CALayer {
         contents?.replacePixels(with: pixelBytes, bytesPerPixel: 4)
     }
 }
+#endif

Sources/AVURLAsset+Android.swift

@@ -1,3 +1,4 @@
+#if os(Android)
 //
 //  AVPlayerItem+Android.swift
 //  UIKit
@@ -18,6 +19,7 @@ public class AVPlayerItem {
 public class AVURLAsset: JNIObject {
     public override static var className: String { "org.uikit.AVURLAsset" }
 
+    @MainActor
     public var url: String?
 
     @MainActor
@@ -26,3 +28,4 @@ public class AVURLAsset: JNIObject {
         self.url = url
     }
 }
+#endif

Sources/Button.swift

@@ -11,15 +11,16 @@
 
 fileprivate let labelVerticalPadding: CGFloat = 6
 
+@MainActor
 open class Button: UIControl {
-    internal (set) public var imageView: UIImageView? {
+    internal(set) public var imageView: UIImageView? {
         didSet {
             oldValue?.removeFromSuperview()
             if let imageView = imageView { addSubview(imageView) }
         }
     }
-    
-    internal (set) public var titleLabel: UILabel? {
+
+    internal(set) public var titleLabel: UILabel? {
         didSet {
             oldValue?.removeFromSuperview()
             if let titleLabel = titleLabel { addSubview(titleLabel) }
@@ -75,22 +76,24 @@ open class Button: UIControl {
         }
     }
 
-    public let tapGestureRecognizer = UITapGestureRecognizer()
+    public let tapGestureRecognizer: UITapGestureRecognizer
     public var onPress: (@MainActor () -> Void)? {
         get { return tapGestureRecognizer.onPress }
         set { tapGestureRecognizer.onPress = newValue }
     }
 
+    @MainActor
     public override init(frame: CGRect) {
+        tapGestureRecognizer = UITapGestureRecognizer(onPress: nil)
         super.init(frame: frame)
 
-        let titleLabel = UILabel()
+        let titleLabel = UILabel(frame: .zero)
         titleLabel.isHidden = true
         addSubview(titleLabel)
         setTitleColor(.white, for: .normal)
         self.titleLabel = titleLabel
 
-        let imageView = UIImageView()
+        let imageView = UIImageView(frame: .zero)
         imageView.isHidden = true
         imageView.contentMode = .scaleAspectFit
         addSubview(imageView)

Sources/CALayer+SDL.swift

@@ -6,9 +6,10 @@
 //  Copyright © 2017 flowkey. All rights reserved.
 //
 
-import SDL_gpu
+internal import SDL_gpu
 
 extension CALayer {
+    @MainActor
     final func sdlRender(parentAbsoluteOpacity: Float = 1) {
         guard let renderer = UIScreen.main else { return }
         let opacity = self.opacity * parentAbsoluteOpacity

Sources/CALayer+animations.swift

@@ -117,7 +117,7 @@ extension CALayer {
 }
 
 extension CALayer {
-    static let defaultAnimationDuration: CGFloat = 0.25
+    nonisolated static let defaultAnimationDuration: CGFloat = 0.25
 
     static func defaultAction(forKey event: String) -> CABasicAnimation {
         let animation = CABasicAnimation(keyPath: AnimationKeyPath(stringLiteral: event))

Sources/CALayer.swift

@@ -1,4 +1,4 @@
-import SDL
+internal import SDL
 
 @MainActor
 open class CALayer {
@@ -14,8 +14,8 @@ open class CALayer {
 
     open var contentsGravity: CALayerContentsGravity = .resize
 
-    internal (set) public weak var superlayer: CALayer?
-    internal (set) public var sublayers: [CALayer]? {
+    internal(set) public weak var superlayer: CALayer?
+    internal(set) public var sublayers: [CALayer]? {
         didSet { CALayer.layerTreeIsDirty = true }
     }
 
@@ -283,11 +283,11 @@ extension CALayer {
 }
 
 extension CALayer: Hashable {
-    public func hash(into hasher: inout Hasher) {
+    nonisolated public func hash(into hasher: inout Hasher) {
         hasher.combine(ObjectIdentifier(self).hashValue)
     }
 
-    public static func == (lhs: CALayer, rhs: CALayer) -> Bool {
+    nonisolated public static func == (lhs: CALayer, rhs: CALayer) -> Bool {
         return lhs === rhs
     }
 }

Sources/CATransform3D+SDL_gpu.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2018 flowkey. All rights reserved.
 //
 
-import SDL_gpu
+internal import SDL_gpu
 
 extension CATransform3D {
     /// Set the current transformation as SDL_GPU's current transform matrix

Sources/CATransform3D+animations.swift

@@ -5,7 +5,7 @@
 //  Created by Michael Knoch on 19.01.18.
 //
 
-import SDL_gpu
+internal import SDL_gpu
 
 // It doesn't make sense to make these public, they're only to simplify our animation code:
 internal extension CATransform3D {

Sources/CGDataProvider.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2017 flowkey. All rights reserved.
 //
 
-import SDL
+internal import SDL
 
 public class CGDataProvider {
     public var data: [CChar]

Sources/CGImage.swift

@@ -1,5 +1,5 @@
-import SDL
-import SDL_gpu
+internal import SDL
+internal import SDL_gpu
 
 public class CGImage {
     /// Be careful using this pointer e.g. for another CGImage instance.

Sources/Data+fromRelativePathCrossPlatform.swift

@@ -6,8 +6,10 @@
 //  Copyright © 2018 flowkey. All rights reserved.
 //
 
+internal import SDL
+
 extension Data {
-    public static func _fromPathCrossPlatform(_ path: String) -> Data? {
+    static func _fromPathCrossPlatform(_ path: String) -> Data? {
         guard let fileReader = SDL_RWFromFile(path, "r") else {
             return nil
         }

Sources/DisplayLink.swift

@@ -34,11 +34,11 @@ open class DisplayLink {
 }
 
 extension DisplayLink: Hashable {
-    public func hash(into hasher: inout Hasher) {
+    nonisolated public func hash(into hasher: inout Hasher) {
         hasher.combine(ObjectIdentifier(self).hashValue)
     }
 
-    public static func == (lhs: DisplayLink, rhs: DisplayLink) -> Bool {
+    nonisolated public static func ==(lhs: DisplayLink, rhs: DisplayLink) -> Bool {
         return lhs === rhs
     }
 }

Sources/FontRenderer+renderAttributedString.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2018 flowkey. All rights reserved.
 //
 
-import SDL_ttf
+internal import SDL_ttf
 
 extension FontRenderer {
     func getFontKerningOffset(between previousIndex: FT_UInt?, and currentIndex: FT_UInt) -> Int32 {

Sources/FontRenderer+singleLineSize.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2018 flowkey. All rights reserved.
 //
 
-import SDL_ttf
+internal import SDL_ttf
 
 extension FontRenderer {
     // From `TTF_HANDLE_STYLE_BOLD`

Sources/FontRenderer.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2017 flowkey. All rights reserved.
 //
 
-import SDL_ttf
+internal import SDL_ttf
 
 
 extension FontRenderer {

Sources/Logging.swift

@@ -1,3 +1,4 @@
+#if os(Android)
 //
 //  Logging.swift
 //  UIKit
@@ -6,7 +7,7 @@
 //  Copyright © 2017 flowkey. All rights reserved.
 //
 
-import SDL
+internal import SDL
 
 #if os(Android)
 import Bionic
@@ -48,3 +49,4 @@ public func fatalError(_ message: @autoclosure () -> String = "", file: StaticSt
 public enum LogPriority: Int32 {
     case `unknown`,`default`,`verbose`,`debug`,`info`,`warn`,`error`,`fatal`,`silent`
 }
+#endif

Sources/Math.swift

@@ -0,0 +1,29 @@
+#if os(WASI)
+@_exported import func WASILibc.pow
+@_exported import func WASILibc.log10
+@_exported import func WASILibc.log
+@_exported import func WASILibc.sin
+@_exported import func WASILibc.cos
+#elseif canImport(Bionic)
+@_exported import func Bionic.pow
+@_exported import func Bionic.acosf
+@_exported import func Bionic.log10
+@_exported import func Bionic.log
+@_exported import func Bionic.sin
+@_exported import func Bionic.sinf
+@_exported import func Bionic.cos
+@_exported import var Bionic.CLOCK_REALTIME
+@_exported import func Bionic.clock_gettime
+@_exported import struct Bionic.timespec
+@_exported import struct Bionic.clockid_t
+#elseif canImport(Darwin)
+@_exported import func Foundation.acosf
+@_exported import func Foundation.pow
+@_exported import func Foundation.log10
+@_exported import func Foundation.log
+@_exported import func Foundation.sin
+@_exported import func Foundation.sinf
+@_exported import func Foundation.cos
+@_exported import func Foundation.clock_gettime
+@_exported import struct Foundation.timespec
+#endif

Sources/MeteringView.swift

@@ -35,7 +35,7 @@ class MeteringView: UILabel {
 
     private func updateDisplay(to value: Double) {
         guard value.isFinite else { return }
-        let value = Int(round(value))
+        let value = Int(value.rounded())
         self.text = metric + ": \(value)"
         self.sizeToFit()
     }

Sources/NotificationCenter.swift

@@ -1,8 +1,8 @@
 #if os(Android)
 import var JNI.isMainThread
-#else
-import Foundation
-var isMainThread: Bool {
+#elseif canImport(Darwin)
+import class Foundation.Thread
+private var isMainThread: Bool {
     return Thread.isMainThread
 }
 #endif

Sources/SDL+JNIExtensions.swift

@@ -1,3 +1,4 @@
+#if os(Android)
 //
 //  SDL+JNIExtensions.swift
 //  UIKit
@@ -50,3 +51,4 @@ struct JavaSDLView: JavaParameterConvertible {
         return self.init(javaStringObject)
     }
 }
+#endif