Add iOS options for handling landscape fullscreen (fixes #38)

Model/Player/PlayerModel.swift

@@ -1,15 +1,18 @@
 import AVKit
 import CoreData
+#if os(iOS)
+    import CoreMotion
+#endif
 import Defaults
 import Foundation
 import Logging
 import MediaPlayer
-#if !os(macOS)
-    import UIKit
-#endif
 import Siesta
 import SwiftUI
 import SwiftyJSON
+#if !os(macOS)
+    import UIKit
+#endif
 
 final class PlayerModel: ObservableObject {
     static let availableRates: [Float] = [0.5, 0.67, 0.8, 1, 1.25, 1.5, 2]
@@ -44,6 +47,12 @@ final class PlayerModel: ObservableObject {
 
     @Published var channelWithDetails: Channel?
 
+    #if os(iOS)
+        @Published var motionManager: CMMotionManager!
+        @Published var lockedOrientation: UIInterfaceOrientation?
+        @Published var lastOrientation: UIInterfaceOrientation?
+    #endif
+
     var accounts: AccountsModel
     var comments: CommentsModel
 
@@ -63,6 +72,7 @@ final class PlayerModel: ObservableObject {
     private var timeObserverThrottle = Throttle(interval: 2)
 
     var playingInPictureInPicture = false
+    var playingFullscreen = false
 
     @Published var presentingErrorDetails = false
     var playerError: Error? { didSet {
@@ -105,11 +115,8 @@ final class PlayerModel: ObservableObject {
     }
 
     func hide() {
-        guard presentingPlayer else {
-            return
-        }
-
         presentingPlayer = false
+        playerNavigationLinkActive = false
     }
 
     func togglePlayer() {
@@ -388,7 +395,9 @@ final class PlayerModel: ObservableObject {
                     self?.insertPlayerItem(stream, for: video, preservingTime: preservingTime)
                 }
             case .failed:
+                DispatchQueue.main.async { [weak self] in
                     self?.playerError = error
+                }
             default:
                 return
             }
@@ -808,5 +817,27 @@ final class PlayerModel: ObservableObject {
             show()
             closePiP()
         }
+
+        func enterFullScreen() {
+            guard !playingFullscreen else {
+                return
+            }
+
+            logger.info("entering fullscreen")
+
+            controller?.playerView
+                .perform(NSSelectorFromString("enterFullScreenAnimated:completionHandler:"), with: false, with: nil)
+        }
+
+        func exitFullScreen() {
+            guard playingFullscreen else {
+                return
+            }
+
+            logger.info("exiting fullscreen")
+
+            controller?.playerView
+                .perform(NSSelectorFromString("exitFullScreenAnimated:completionHandler:"), with: false, with: nil)
+        }
     #endif
 }

Shared/Defaults.swift

@@ -82,6 +82,12 @@ extension Defaults.Keys {
     #if os(macOS)
         static let enableBetaChannel = Key<Bool>("enableBetaChannel", default: false)
     #endif
+
+    #if os(iOS)
+        static let honorSystemOrientationLock = Key<Bool>("honorSystemOrientationLock", default: true)
+        static let enterFullscreenInLandscape = Key<Bool>("enterFullscreenInLandscape", default: UIDevice.current.userInterfaceIdiom == .phone)
+        static let lockLandscapeWhenEnteringFullscreen = Key<Bool>("lockLandscapeWhenEnteringFullscreen", default: false)
+    #endif
 }
 
 enum ResolutionSetting: String, CaseIterable, Defaults.Serializable {

Shared/Player/PlayerViewController.swift

@@ -132,17 +132,32 @@ extension PlayerViewController: AVPlayerViewControllerDelegate {
     func playerViewController(
         _: AVPlayerViewController,
         willBeginFullScreenPresentationWithAnimationCoordinator _: UIViewControllerTransitionCoordinator
-    ) {}
+    ) {
+        playerModel.playingFullscreen = true
+    }
 
     func playerViewController(
         _: AVPlayerViewController,
         willEndFullScreenPresentationWithAnimationCoordinator coordinator: UIViewControllerTransitionCoordinator
     ) {
+        let wasPlaying = playerModel.isPlaying
         coordinator.animate(alongsideTransition: nil) { context in
+            #if os(iOS)
+                if wasPlaying {
+                    self.playerModel.play()
+                }
+            #endif
             if !context.isCancelled {
                 #if os(iOS)
-                    if self.traitCollection.verticalSizeClass == .compact {
+                    self.playerModel.lockedOrientation = nil
-                        self.dismiss(animated: true)
+                    if Defaults[.enterFullscreenInLandscape] {
+                        Orientation.lockOrientation(.portrait, andRotateTo: .portrait)
+                    }
+
+                    self.playerModel.playingFullscreen = false
+
+                    if wasPlaying {
+                        self.playerModel.play()
                     }
                 #endif
             }

Shared/Player/VideoPlayerView.swift

@@ -1,4 +1,7 @@
 import AVKit
+#if os(iOS)
+    import CoreMotion
+#endif
 import Defaults
 import Siesta
 import SwiftUI
@@ -22,6 +25,16 @@ struct VideoPlayerView: View {
         @Environment(\.presentationMode) private var presentationMode
         @Environment(\.horizontalSizeClass) private var horizontalSizeClass
         @Environment(\.verticalSizeClass) private var verticalSizeClass
+
+        @Default(.enterFullscreenInLandscape) private var enterFullscreenInLandscape
+        @Default(.honorSystemOrientationLock) private var honorSystemOrientationLock
+        @Default(.lockLandscapeWhenEnteringFullscreen) private var lockLandscapeWhenEnteringFullscreen
+
+        @State private var motionManager: CMMotionManager!
+        @State private var orientation = UIInterfaceOrientation.portrait
+        @State private var lastOrientation: UIInterfaceOrientation?
+
+        private var orientationThrottle = Throttle(interval: 2)
     #endif
 
     @EnvironmentObject<AccountsModel> private var accounts
@@ -38,13 +51,36 @@ struct VideoPlayerView: View {
             GeometryReader { geometry in
                 HStack(spacing: 0) {
                     content
-                }
                         .onAppear {
-                    self.playerSize = geometry.size
+                            playerSize = geometry.size
+
+                            #if os(iOS)
+                                configureOrientationUpdatesBasedOnAccelerometer()
+                            #endif
+                        }
                 }
                 .onChange(of: geometry.size) { size in
                     self.playerSize = size
                 }
+                #if os(iOS)
+                .onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in
+                    handleOrientationDidChangeNotification()
+                }
+                .onDisappear {
+                    guard !player.playingFullscreen else {
+                        return // swiftlint:disable:this implicit_return
+                    }
+
+                    if Defaults[.lockPortraitWhenBrowsing] {
+                        Orientation.lockOrientation(.portrait, andRotateTo: .portrait)
+                    } else {
+                        Orientation.lockOrientation(.allButUpsideDown)
+                    }
+
+                    motionManager?.stopAccelerometerUpdates()
+                    motionManager = nil
+                }
+                #endif
             }
             .navigationBarHidden(true)
         #endif
@@ -192,6 +228,110 @@ struct VideoPlayerView: View {
             set: { _ in }
         )
     }
+
+    #if os(iOS)
+        private func configureOrientationUpdatesBasedOnAccelerometer() {
+            if UIDevice.current.orientation.isLandscape, enterFullscreenInLandscape, !player.playingFullscreen {
+                DispatchQueue.main.async {
+                    player.enterFullScreen()
+                }
+            }
+
+            guard !honorSystemOrientationLock, motionManager.isNil else {
+                return
+            }
+
+            motionManager = CMMotionManager()
+            motionManager.accelerometerUpdateInterval = 0.2
+            motionManager.startAccelerometerUpdates(to: OperationQueue()) { data, _ in
+                guard player.presentingPlayer, !data.isNil else {
+                    return
+                }
+
+                guard let acceleration = data?.acceleration else {
+                    return
+                }
+
+                var orientation = UIInterfaceOrientation.unknown
+
+                if acceleration.x >= 0.65 {
+                    orientation = .landscapeLeft
+                } else if acceleration.x <= -0.65 {
+                    orientation = .landscapeRight
+                } else if acceleration.y <= -0.65 {
+                    orientation = .portrait
+                } else if acceleration.y >= 0.65 {
+                    orientation = .portraitUpsideDown
+                }
+
+                guard lastOrientation != orientation else {
+                    return
+                }
+
+                lastOrientation = orientation
+
+                if orientation.isLandscape {
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.8) {
+                        guard enterFullscreenInLandscape else {
+                            return
+                        }
+
+                        player.enterFullScreen()
+
+                        let orientationLockMask = orientation == .landscapeLeft ? UIInterfaceOrientationMask.landscapeLeft : .landscapeRight
+
+                        Orientation.lockOrientation(orientationLockMask, andRotateTo: orientation)
+
+                        guard lockLandscapeWhenEnteringFullscreen else {
+                            return
+                        }
+
+                        player.lockedOrientation = orientation
+                    }
+                } else {
+                    guard abs(acceleration.z) <= 0.74,
+                          player.lockedOrientation.isNil,
+                          enterFullscreenInLandscape
+                    else {
+                        return
+                    }
+
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.4) {
+                        player.exitFullScreen()
+                    }
+
+                    Orientation.lockOrientation(.portrait)
+                }
+            }
+        }
+
+        private func handleOrientationDidChangeNotification() {
+            let newOrientation = UIApplication.shared.windows.first?.windowScene?.interfaceOrientation
+            if newOrientation?.isLandscape ?? false, player.presentingPlayer, lockLandscapeWhenEnteringFullscreen, !player.lockedOrientation.isNil {
+                Orientation.lockOrientation(.landscape, andRotateTo: newOrientation)
+                return
+            }
+
+            guard player.presentingPlayer, enterFullscreenInLandscape, honorSystemOrientationLock else {
+                return
+            }
+
+            if UIDevice.current.orientation.isLandscape {
+                DispatchQueue.main.async {
+                    player.lockedOrientation = newOrientation
+                    player.enterFullScreen()
+                }
+            } else {
+                DispatchQueue.main.async {
+                    player.exitFullScreen()
+                }
+
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.8) {
+                    player.exitFullScreen()
+                }
+            }
+        }
+    #endif
 }
 
 struct VideoPlayerView_Previews: PreviewProvider {

Shared/Settings/PlaybackSettings.swift

@@ -10,6 +10,11 @@ struct PlaybackSettings: View {
     @Default(.showKeywords) private var showKeywords
     @Default(.showChannelSubscribers) private var channelSubscribers
     @Default(.pauseOnHidingPlayer) private var pauseOnHidingPlayer
+    #if os(iOS)
+        @Default(.honorSystemOrientationLock) private var honorSystemOrientationLock
+        @Default(.lockLandscapeWhenEnteringFullscreen) private var lockLandscapeWhenEnteringFullscreen
+        @Default(.enterFullscreenInLandscape) private var enterFullscreenInLandscape
+    #endif
     @Default(.closePiPOnNavigation) private var closePiPOnNavigation
     @Default(.closePiPOnOpeningPlayer) private var closePiPOnOpeningPlayer
     #if !os(macOS)
@@ -37,6 +42,13 @@ struct PlaybackSettings: View {
                     showHistoryToggle
                     channelSubscribersToggle
                     pauseOnHidingPlayerToggle
+
+                    if idiom == .pad {
+                        enterFullscreenInLandscapeToggle
+                    }
+
+                    honorSystemOrientationLockToggle
+                    lockLandscapeWhenEnteringFullscreenToggle
                 }
 
                 Section(header: SettingsHeader(text: "Picture in Picture")) {
@@ -147,6 +159,22 @@ struct PlaybackSettings: View {
         Toggle("Pause when player is closed", isOn: $pauseOnHidingPlayer)
     }
 
+    #if os(iOS)
+        private var honorSystemOrientationLockToggle: some View {
+            Toggle("Honor system orientation lock", isOn: $honorSystemOrientationLock)
+                .disabled(!enterFullscreenInLandscape)
+        }
+
+        private var enterFullscreenInLandscapeToggle: some View {
+            Toggle("Enter fullscreen in landscape", isOn: $enterFullscreenInLandscape)
+        }
+
+        private var lockLandscapeWhenEnteringFullscreenToggle: some View {
+            Toggle("Lock landscape orientation when entering fullscreen", isOn: $lockLandscapeWhenEnteringFullscreen)
+                .disabled(!enterFullscreenInLandscape)
+        }
+    #endif
+
     private var closePiPOnNavigationToggle: some View {
         Toggle("Close PiP when starting playing other video", isOn: $closePiPOnNavigation)
     }