PiP and UI improvements

macOS/PictureInPictureDelegate.swift

@@ -0,0 +1,28 @@
+import AVKit
+import Foundation
+
+final class PictureInPictureDelegate: NSObject, AVPlayerViewPictureInPictureDelegate {
+    var playerModel: PlayerModel!
+
+    func playerViewShouldAutomaticallyDismissAtPicture(inPictureStart _: AVPlayerView) -> Bool {
+        false
+    }
+
+    func playerViewWillStartPicture(inPicture _: AVPlayerView) {
+        playerModel.playingInPictureInPicture = true
+        playerModel.presentingPlayer = false
+    }
+
+    func playerViewWillStopPicture(inPicture _: AVPlayerView) {
+        playerModel.playingInPictureInPicture = false
+        playerModel.presentPlayer()
+    }
+
+    func playerView(
+        _: AVPlayerView,
+        restoreUserInterfaceForPictureInPictureStopWithCompletionHandler completionHandler: (Bool) -> Void
+    ) {
+        playerModel.presentingPlayer = true
+        completionHandler(true)
+    }
+}