feat(ios): forward real fullscreen events from AVPlayer instead of guessing (#4509)

ios/Video/Features/RCTPlayerObserver.swift

@@ -31,6 +31,10 @@ protocol RCTPlayerObserverHandler: RCTPlayerObserverHandlerObjc {
     func handlePictureInPictureEnter()
     func handlePictureInPictureExit()
     func handleRestoreUserInterfaceForPictureInPictureStop()
+    func handleWillEnterFullScreen()
+    func handleDidEnterFullScreen()
+    func handleWillExitFullScreen()
+    func handleDidExitFullScreen()
 }
 
 // MARK: - RCTPlayerObserver
@@ -323,17 +327,32 @@ class RCTPlayerObserver: NSObject, AVPlayerItemMetadataOutputPushDelegate, AVPla
     }
 
     #if !os(tvOS)
+        func playerViewController(
+            _: AVPlayerViewController,
+            willBeginFullScreenPresentationWithAnimationCoordinator coordinator: UIViewControllerTransitionCoordinator
+        ) {
+            self._handlers?.handleWillEnterFullScreen()
+            coordinator.animate(alongsideTransition: nil) { [weak self] context in
+                guard let self, !context.isCancelled else { return }
+                self._handlers?.handleDidEnterFullScreen()
+            }
+        }
+
         func playerViewController(
             _: AVPlayerViewController,
             willEndFullScreenPresentationWithAnimationCoordinator coordinator: UIViewControllerTransitionCoordinator
         ) {
+            self._handlers?.handleWillExitFullScreen()
             // iOS automatically pauses videos after exiting fullscreen,
             // but it's better if we resume playback
             let wasPlaying = player?.timeControlStatus == .playing
 
             coordinator.animate(alongsideTransition: nil) { [weak self] context in
-                guard let self, !context.isCancelled, wasPlaying else { return }
+                guard let self, !context.isCancelled else { return }
-                self.player?.play()
+                self._handlers?.handleDidExitFullScreen()
+                if wasPlaying == true {
+                    self.player?.play()
+                }
             }
         }
     #endif

ios/Video/RCTVideo.swift

@@ -55,7 +55,6 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
     private var _fullscreenAutorotate = true
     private var _fullscreenOrientation: String = "all"
     private var _fullscreenPlayerPresented = false
-    private var _fullscreenUncontrolPlayerPresented = false // to call events switching full screen mode from player controls
     private var _filterName: String!
     private var _filterEnabled = false
     private var _presentingViewController: UIViewController?
@@ -1682,25 +1681,6 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
         guard let bounds = RCTVideoUtils.getCurrentWindow()?.bounds else { return }
 
         if !oldRect!.equalTo(newRect!) {
-            // https://github.com/TheWidlarzGroup/react-native-video/issues/3085#issuecomment-1557293391
-            if newRect!.equalTo(bounds) {
-                RCTLog("in fullscreen")
-                if !_fullscreenUncontrolPlayerPresented {
-                    _fullscreenUncontrolPlayerPresented = true
-
-                    self.onVideoFullscreenPlayerWillPresent?(["target": self.reactTag as Any])
-                    self.onVideoFullscreenPlayerDidPresent?(["target": self.reactTag as Any])
-                }
-            } else {
-                NSLog("not fullscreen")
-                if _fullscreenUncontrolPlayerPresented {
-                    _fullscreenUncontrolPlayerPresented = false
-
-                    self.onVideoFullscreenPlayerWillDismiss?(["target": self.reactTag as Any])
-                    self.onVideoFullscreenPlayerDidDismiss?(["target": self.reactTag as Any])
-                }
-            }
-
             if let reactVC = self.reactViewController() {
                 reactVC.view.frame = bounds
                 reactVC.view.setNeedsLayout()
@@ -1708,6 +1688,22 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
         }
     }
 
+    func handleWillEnterFullScreen() {
+        self.onVideoFullscreenPlayerWillPresent?(["target": self.reactTag as Any])
+    }
+
+    func handleDidEnterFullScreen() {
+        self.onVideoFullscreenPlayerDidPresent?(["target": self.reactTag as Any])
+    }
+
+    func handleWillExitFullScreen() {
+        self.onVideoFullscreenPlayerWillDismiss?(["target": self.reactTag as Any])
+    }
+
+    func handleDidExitFullScreen() {
+        self.onVideoFullscreenPlayerDidDismiss?(["target": self.reactTag as Any])
+    }
+
     @objc
     func handleDidFailToFinishPlaying(notification: NSNotification!) {
         guard onVideoError != nil else { return }