Layout and PiP improvements, new settings

- player is now a separate window on macOS
- add setting to disable pause when player is closed (fixes #40)
- add PiP settings:
  * Close PiP when starting playing other video
  * Close PiP when player is opened
  * Close PiP and open player when application
    enters foreground (iOS/tvOS) (fixes #37)
- new player placeholder when in PiP, context menu with exit option

macOS/InstancesSettings.swift

@@ -94,7 +94,7 @@ struct InstancesSettings: View {
                     }
                     .labelsHidden()
 
-                Text("Used to create links from videos, channels and playlist")
+                Text("Used to create links from videos, channels and playlists")
                     .font(.caption)
                     .foregroundColor(.secondary)
             }

macOS/OpenWindow.swift

@@ -0,0 +1,40 @@
+import AppKit
+import Foundation
+
+enum OpenWindow: String, CaseIterable {
+    case player, main
+
+    var window: NSWindow? {
+        // this is not solid but works as long as there is only two windows in the app
+        // needs to be changed in case we ever have more windows to handle
+
+        switch self {
+        case .player:
+            return NSApplication.shared.windows.last
+        case .main:
+            return NSApplication.shared.windows.first
+        }
+    }
+
+    func focus() {
+        window?.makeKeyAndOrderFront(self)
+    }
+
+    var location: String {
+        switch self {
+        case .player:
+            return rawValue
+        case .main:
+            return ""
+        }
+    }
+
+    func open() {
+        switch self {
+        case .player:
+            NSWorkspace.shared.open(URL(string: "yattee://player")!)
+        case .main:
+            Self.main.focus()
+        }
+    }
+}

macOS/PictureInPictureDelegate.swift

@@ -11,14 +11,14 @@ final class PictureInPictureDelegate: NSObject, AVPlayerViewPictureInPictureDele
     func playerViewWillStartPicture(inPicture _: AVPlayerView) {
         DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in
             self?.playerModel.playingInPictureInPicture = true
-            self?.playerModel.presentingPlayer = false
+            self?.playerModel.hide()
         }
     }
 
     func playerViewWillStopPicture(inPicture _: AVPlayerView) {
         DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in
             self?.playerModel.playingInPictureInPicture = false
-            self?.playerModel.presentPlayer()
+            self?.playerModel.show()
         }
     }
 
@@ -27,7 +27,7 @@ final class PictureInPictureDelegate: NSObject, AVPlayerViewPictureInPictureDele
         restoreUserInterfaceForPictureInPictureStopWithCompletionHandler completionHandler: (Bool) -> Void
     ) {
         DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in
-            self?.playerModel.presentingPlayer = true
+            self?.playerModel.show()
         }
         completionHandler(true)
     }

macOS/Player.swift

@@ -4,7 +4,7 @@ import SwiftUI
 struct Player: NSViewControllerRepresentable {
     @EnvironmentObject<PlayerModel> private var player
 
-    var controller: PlayerViewController?
+    @State private var controller: PlayerViewController?
 
     init(controller: PlayerViewController? = nil) {
         self.controller = controller