Add a basic Mac implementation

.gitignore

@@ -258,4 +258,7 @@ paket-files/
 
 # Python Tools for Visual Studio (PTVS)
 __pycache__/
-*.pyc
+*.pyc
+
+# Xcode
+xcuserdata

DVDScreenSaver-Cocoa/DVDScreenSaver-TestApp/AppDelegate.swift

@@ -0,0 +1,6 @@
+import Cocoa
+
+@NSApplicationMain
+class AppDelegate: NSObject, NSApplicationDelegate {
+
+}

DVDScreenSaver-Cocoa/DVDScreenSaver-TestApp/DVDScreenSaverView.swift

@@ -0,0 +1,65 @@
+import Cocoa
+
+extension NSColor {
+
+    convenience init(_ r: CGFloat, _ g: CGFloat, _ b: CGFloat) {
+        self.init(calibratedRed: r/255.0, green: g/255.0, blue: b/255.0, alpha: 1)
+    }
+
+}
+
+class DVDScreenSaverView: NSView {
+
+    @IBOutlet weak var imageView: NSImageView!
+
+    private let logoScale: CGFloat = 6
+    private var logo: MovingLogo?
+    private var timer: Timer?
+
+    override func awakeFromNib() {
+        guard let image = NSImage(named: "DVDVideo360"),
+            let superview = self.imageView.superview else {
+            print("Setup failed")
+            return
+        }
+        logo = MovingLogo(
+            image: image,
+            colors: [
+                NSColor(190, 0, 255),
+                NSColor(255, 0, 139),
+                NSColor(255, 131, 0),
+                NSColor(0, 38, 255),
+                NSColor(255, 250, 0),
+            ],
+            onNewPosition: { rect in
+                self.imageView.frame = rect
+            },
+            onRedraw: { image in
+                self.imageView.image = image
+            }
+        )
+        let rescale = {
+            self.logo?.rescale(bounds: superview.bounds, scale: self.logoScale)
+        }
+        logo?.nextColor()
+        rescale()
+        logo?.placeInRandomSpot()
+        superview.postsFrameChangedNotifications = true
+        NotificationCenter.default.addObserver(forName: NSView.frameDidChangeNotification, object: superview, queue: nil) { _ in
+            rescale()
+        }
+        timer = Timer.scheduledTimer(withTimeInterval: 1/60, repeats: true) { _ in
+            self.logo?.animate()
+        }
+        if let timer = timer {
+            RunLoop.current.add(timer, forMode: .eventTracking)
+        }
+    }
+
+    override func viewDidMoveToWindow() {
+        if let win = window {
+            win.backgroundColor = .black
+        }
+    }
+
+}

DVDScreenSaver-Cocoa/DVDScreenSaver-TestApp/DVDScreenSaver_TestApp.entitlements

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+</dict>
+</plist>

DVDScreenSaver-Cocoa/DVDScreenSaver-TestApp/Info.plist

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIconFile</key>
+	<string></string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
+	<key>NSMainNibFile</key>
+	<string>MainMenu</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+</dict>
+</plist>