RNSScreen.mm

#import <UIKit/UIKit.h>

#import "RNSScreen.h"
#import "RNSScreenContainer.h"
#import "RNSScreenWindowTraits.h"

#ifdef RCT_NEW_ARCH_ENABLED
#import <React/RCTConversions.h>
#import <React/RCTFabricComponentsPlugins.h>
#import <React/RCTRootComponentView.h>
#import <React/RCTSurfaceTouchHandler.h>
#import <react/renderer/components/rnscreens/EventEmitters.h>
#import <react/renderer/components/rnscreens/Props.h>
#import <react/renderer/components/rnscreens/RCTComponentViewHelpers.h>
#import <rnscreens/RNSScreenComponentDescriptor.h>
#import "RNSConvert.h"
#import "RNSScreenViewEvent.h"
#else
#import <React/RCTTouchHandler.h>
#endif

#import <React/RCTShadowView.h>
#import <React/RCTUIManager.h>
#import "NSArray+RNSUtil.h"
#import "RNSScreenStack.h"
#import "RNSScreenStackHeaderConfig.h"

#ifdef RCT_NEW_ARCH_ENABLED
namespace react = facebook::react;
#endif // RCT_NEW_ARCH_ENABLED

@interface RNSScreenView ()
#ifdef RCT_NEW_ARCH_ENABLED
    <RCTRNSScreenViewProtocol, UIAdaptivePresentationControllerDelegate, CAAnimationDelegate>
#else
    <UIAdaptivePresentationControllerDelegate, RCTInvalidating, CAAnimationDelegate>
#endif
@end

@implementation RNSScreenView {
  __weak RCTBridge *_bridge;
#ifdef RCT_NEW_ARCH_ENABLED
  RCTSurfaceTouchHandler *_touchHandler;
  react::RNSScreenShadowNode::ConcreteState::Shared _state;
  // on fabric, they are not available by default so we need them exposed here too
  NSMutableArray<UIView *> *_reactSubviews;
#else
  RCTTouchHandler *_touchHandler;
  CGRect _reactFrame;
#endif
}

#ifdef RCT_NEW_ARCH_ENABLED
- (instancetype)initWithFrame:(CGRect)frame
{
  if (self = [super initWithFrame:frame]) {
    static const auto defaultProps = std::make_shared<const react::RNSScreenProps>();
    _props = defaultProps;
    _reactSubviews = [NSMutableArray new];
    [self initCommonProps];
  }
  return self;
}
#endif // RCT_NEW_ARCH_ENABLED

- (instancetype)initWithBridge:(RCTBridge *)bridge
{
  if (self = [super init]) {
    _bridge = bridge;
    [self initCommonProps];
  }

  return self;
}

- (void)initCommonProps
{
  _controller = [[RNSScreen alloc] initWithView:self];
  _stackPresentation = RNSScreenStackPresentationPush;
  _stackAnimation = RNSScreenStackAnimationDefault;
  _gestureEnabled = YES;
  _replaceAnimation = RNSScreenReplaceAnimationPop;
  _dismissed = NO;
  _hasStatusBarStyleSet = NO;
  _hasStatusBarAnimationSet = NO;
  _hasStatusBarHiddenSet = NO;
  _hasOrientationSet = NO;
  _hasHomeIndicatorHiddenSet = NO;
#if !TARGET_OS_TV
  _sheetExpandsWhenScrolledToEdge = YES;
  _sheetCustomDetents = [NSArray array];
  _sheetCustomLargestUndimmedDetent = nil;
#endif // !TARGET_OS_TV
}

- (UIViewController *)reactViewController
{
  return _controller;
}

#ifdef RCT_NEW_ARCH_ENABLED
- (NSArray<UIView *> *)reactSubviews
{
  return _reactSubviews;
}
#endif

- (void)updateBounds
{
#ifdef RCT_NEW_ARCH_ENABLED
  if (_state != nullptr) {
    CAAnimation *sizeAnimation = [self.layer animationForKey:@"bounds.size"];
    if (sizeAnimation != nil && self.layer.presentationLayer.bounds.size.height > self.bounds.size.height) {
      CABasicAnimation *callbackOnlyAnimation = [CABasicAnimation new];
      callbackOnlyAnimation.duration = sizeAnimation.duration;
      callbackOnlyAnimation.beginTime = sizeAnimation.beginTime;
      callbackOnlyAnimation.delegate = self;
      [self.layer addAnimation:callbackOnlyAnimation forKey:@"rns_sheet_animation"];
    } else {
      auto newState = react::RNSScreenState{RCTSizeFromCGSize(self.bounds.size)};
      _state->updateState(std::move(newState));
      UINavigationController *navctr = _controller.navigationController;
      [navctr.view setNeedsLayout];
    }
  }
#else
  CAAnimation *sizeAnimation = [self.layer animationForKey:@"bounds.size"];
  if (sizeAnimation && self.layer.presentationLayer.bounds.size.height > self.bounds.size.height) {
    CABasicAnimation *callbackOnlyAnimation = [CABasicAnimation new];
    callbackOnlyAnimation.duration = sizeAnimation.duration;
    callbackOnlyAnimation.beginTime = sizeAnimation.beginTime;
    callbackOnlyAnimation.delegate = self;
    [self.layer addAnimation:callbackOnlyAnimation forKey:@"rns_sheet_animation"];
  } else {
    [_bridge.uiManager setSize:self.bounds.size forView:self];
  }
#endif
}

- (void)animationDidStop:(CAAnimation *)animation finished:(BOOL)finished
{
  if (finished) {
    [self updateBounds];
  }
}

- (void)setStackPresentation:(RNSScreenStackPresentation)stackPresentation
{
  switch (stackPresentation) {
    case RNSScreenStackPresentationModal:
#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && defined(__IPHONE_13_0) && \
    __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_13_0
      if (@available(iOS 13.0, tvOS 13.0, *)) {
        _controller.modalPresentationStyle = UIModalPresentationAutomatic;
      } else {
        _controller.modalPresentationStyle = UIModalPresentationFullScreen;
      }
#else
      _controller.modalPresentationStyle = UIModalPresentationFullScreen;
#endif
      break;
    case RNSScreenStackPresentationFullScreenModal:
      _controller.modalPresentationStyle = UIModalPresentationFullScreen;
      break;
#if !TARGET_OS_TV
    case RNSScreenStackPresentationFormSheet:
      _controller.modalPresentationStyle = UIModalPresentationFormSheet;
      break;
#endif
    case RNSScreenStackPresentationTransparentModal:
      _controller.modalPresentationStyle = UIModalPresentationOverFullScreen;
      break;
    case RNSScreenStackPresentationContainedModal:
      _controller.modalPresentationStyle = UIModalPresentationCurrentContext;
      break;
    case RNSScreenStackPresentationContainedTransparentModal:
      _controller.modalPresentationStyle = UIModalPresentationOverCurrentContext;
      break;
    case RNSScreenStackPresentationPush:
      // ignored, we only need to keep in mind not to set presentation delegate
      break;
  }

  // There is a bug in UIKit which causes retain loop when presentationController is accessed for a
  // controller that is not going to be presented modally. We therefore need to avoid setting the
  // delegate for screens presented using push. This also means that when controller is updated from
  // modal to push type, this may cause memory leak, we warn about that as well.
  if (stackPresentation != RNSScreenStackPresentationPush) {
    // `modalPresentationStyle` must be set before accessing `presentationController`
    // otherwise a default controller will be created and cannot be changed after.
    // Documented here:
    // https://developer.apple.com/documentation/uikit/uiviewcontroller/1621426-presentationcontroller?language=objc
    _controller.presentationController.delegate = self;
  } else if (_stackPresentation != RNSScreenStackPresentationPush) {
#ifdef RCT_NEW_ARCH_ENABLED
    // TODO: on Fabric, same controllers can be used as modals and then recycled and used a push which would result in
    // this error. It would be good to check if it doesn't leak in such case.
#else
    RCTLogError(
        @"Screen presentation updated from modal to push, this may likely result in a screen object leakage. If you need to change presentation style create a new screen object instead");
#endif
  }
  _stackPresentation = stackPresentation;
}

- (void)setStackAnimation:(RNSScreenStackAnimation)stackAnimation
{
  _stackAnimation = stackAnimation;

  switch (stackAnimation) {
    case RNSScreenStackAnimationFade:
      _controller.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
      break;
#if !TARGET_OS_TV
    case RNSScreenStackAnimationFlip:
      _controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
      break;
#endif
    case RNSScreenStackAnimationNone:
    case RNSScreenStackAnimationDefault:
    case RNSScreenStackAnimationSimplePush:
    case RNSScreenStackAnimationSlideFromBottom:
    case RNSScreenStackAnimationFadeFromBottom:
      // Default
      break;
  }
}

- (void)setGestureEnabled:(BOOL)gestureEnabled
{
#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && defined(__IPHONE_13_0) && \
    __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_13_0
  if (@available(iOS 13.0, tvOS 13.0, *)) {
    _controller.modalInPresentation = !gestureEnabled;
  }
#endif

  _gestureEnabled = gestureEnabled;
}

- (void)setReplaceAnimation:(RNSScreenReplaceAnimation)replaceAnimation
{
  _replaceAnimation = replaceAnimation;
}

// Nil will be provided when activityState is set as an animated value and we change
// it from JS to be a plain value (non animated).
// In case when nil is received, we want to ignore such value and not make
// any updates as the actual non-nil value will follow immediately.
- (void)setActivityStateOrNil:(NSNumber *)activityStateOrNil
{
  int activityState = [activityStateOrNil intValue];
  if (activityStateOrNil != nil && activityState != -1 && activityState != _activityState) {
    _activityState = activityState;
    [_reactSuperview markChildUpdated];
  }
}

#if !TARGET_OS_TV
- (void)setStatusBarStyle:(RNSStatusBarStyle)statusBarStyle
{
  _hasStatusBarStyleSet = YES;
  _statusBarStyle = statusBarStyle;
  [RNSScreenWindowTraits assertViewControllerBasedStatusBarAppearenceSet];
  [RNSScreenWindowTraits updateStatusBarAppearance];
}

- (void)setStatusBarAnimation:(UIStatusBarAnimation)statusBarAnimation
{
  _hasStatusBarAnimationSet = YES;
  _statusBarAnimation = statusBarAnimation;
  [RNSScreenWindowTraits assertViewControllerBasedStatusBarAppearenceSet];
}

- (void)setStatusBarHidden:(BOOL)statusBarHidden
{
  _hasStatusBarHiddenSet = YES;
  _statusBarHidden = statusBarHidden;
  [RNSScreenWindowTraits assertViewControllerBasedStatusBarAppearenceSet];
  [RNSScreenWindowTraits updateStatusBarAppearance];
}

- (void)setScreenOrientation:(UIInterfaceOrientationMask)screenOrientation
{
  _hasOrientationSet = YES;
  _screenOrientation = screenOrientation;
  [RNSScreenWindowTraits enforceDesiredDeviceOrientation];
}

- (void)setHomeIndicatorHidden:(BOOL)homeIndicatorHidden
{
  _hasHomeIndicatorHiddenSet = YES;
  _homeIndicatorHidden = homeIndicatorHidden;
  [RNSScreenWindowTraits updateHomeIndicatorAutoHidden];
}
#endif

- (UIView *)reactSuperview
{
  return _reactSuperview;
}

- (void)addSubview:(UIView *)view
{
  if (![view isKindOfClass:[RNSScreenStackHeaderConfig class]]) {
    [super addSubview:view];
  } else {
    ((RNSScreenStackHeaderConfig *)view).screenView = self;
  }
}

- (void)notifyDismissedWithCount:(int)dismissCount
{
#ifdef RCT_NEW_ARCH_ENABLED
  // If screen is already unmounted then there will be no event emitter
  // it will be cleaned in prepareForRecycle
  if (_eventEmitter != nullptr) {
    std::dynamic_pointer_cast<const react::RNSScreenEventEmitter>(_eventEmitter)
        ->onDismissed(react::RNSScreenEventEmitter::OnDismissed{.dismissCount = dismissCount});
  }
#else
  // TODO: hopefully problems connected to dismissed prop are only the case on paper
  _dismissed = YES;
  if (self.onDismissed) {
    dispatch_async(dispatch_get_main_queue(), ^{
      if (self.onDismissed) {
        self.onDismissed(@{@"dismissCount" : @(dismissCount)});
      }
    });
  }
#endif
}

- (void)notifyDismissCancelledWithDismissCount:(int)dismissCount
{
#ifdef RCT_NEW_ARCH_ENABLED
  // If screen is already unmounted then there will be no event emitter
  // it will be cleaned in prepareForRecycle
  if (_eventEmitter != nullptr) {
    std::dynamic_pointer_cast<const react::RNSScreenEventEmitter>(_eventEmitter)
        ->onNativeDismissCancelled(
            react::RNSScreenEventEmitter::OnNativeDismissCancelled{.dismissCount = dismissCount});
  }
#else
  if (self.onNativeDismissCancelled) {
    self.onNativeDismissCancelled(@{@"dismissCount" : @(dismissCount)});
  }
#endif
}

- (void)notifyWillAppear
{
#ifdef RCT_NEW_ARCH_ENABLED
  // If screen is already unmounted then there will be no event emitter
  // it will be cleaned in prepareForRecycle
  if (_eventEmitter != nullptr) {
    std::dynamic_pointer_cast<const react::RNSScreenEventEmitter>(_eventEmitter)
        ->onWillAppear(react::RNSScreenEventEmitter::OnWillAppear{});
  }
  [self updateLayoutMetrics:_newLayoutMetrics oldLayoutMetrics:_oldLayoutMetrics];
#else
  if (self.onWillAppear) {
    self.onWillAppear(nil);
  }
  // we do it here too because at this moment the `parentViewController` is already not nil,
  // so if the parent is not UINavCtr, the frame will be updated to the correct one.
  [self reactSetFrame:_reactFrame];
#endif
}

- (void)notifyWillDisappear
{
  if (_hideKeyboardOnSwipe) {
    [self endEditing:YES];
  }
#ifdef RCT_NEW_ARCH_ENABLED
  // If screen is already unmounted then there will be no event emitter
  // it will be cleaned in prepareForRecycle
  if (_eventEmitter != nullptr) {
    std::dynamic_pointer_cast<const react::RNSScreenEventEmitter>(_eventEmitter)
        ->onWillDisappear(react::RNSScreenEventEmitter::OnWillDisappear{});
  }
#else
  if (self.onWillDisappear) {
    self.onWillDisappear(nil);
  }
#endif
}

- (void)notifyAppear
{
#ifdef RCT_NEW_ARCH_ENABLED
  // If screen is already unmounted then there will be no event emitter
  // it will be cleaned in prepareForRecycle
  if (_eventEmitter != nullptr) {
    std::dynamic_pointer_cast<const react::RNSScreenEventEmitter>(_eventEmitter)
        ->onAppear(react::RNSScreenEventEmitter::OnAppear{});
  }
#else
  if (self.onAppear) {
    dispatch_async(dispatch_get_main_queue(), ^{
      if (self.onAppear) {
        self.onAppear(nil);
      }
    });
  }
#endif
}

- (void)notifyDisappear
{
#ifdef RCT_NEW_ARCH_ENABLED
  // If screen is already unmounted then there will be no event emitter
  // it will be cleaned in prepareForRecycle
  if (_eventEmitter != nullptr) {
    std::dynamic_pointer_cast<const react::RNSScreenEventEmitter>(_eventEmitter)
        ->onDisappear(react::RNSScreenEventEmitter::OnDisappear{});
  }
#else
  if (self.onDisappear) {
    self.onDisappear(nil);
  }
#endif
}

- (void)notifyGestureCancel
{
#ifdef RCT_NEW_ARCH_ENABLED
  if (_eventEmitter != nullptr) {
    std::dynamic_pointer_cast<const react::RNSScreenEventEmitter>(_eventEmitter)
        ->onGestureCancel(react::RNSScreenEventEmitter::OnGestureCancel{});
  }
#else
  if (self.onGestureCancel) {
    self.onGestureCancel(nil);
  }
#endif
}

- (BOOL)isMountedUnderScreenOrReactRoot
{
#ifdef RCT_NEW_ARCH_ENABLED
#define RNS_EXPECTED_VIEW RCTRootComponentView
#else
#define RNS_EXPECTED_VIEW RCTRootView
#endif
  for (UIView *parent = self.superview; parent != nil; parent = parent.superview) {
    if ([parent isKindOfClass:[RNS_EXPECTED_VIEW class]] || [parent isKindOfClass:[RNSScreenView class]]) {
      return YES;
    }
  }
  return NO;
#undef RNS_EXPECTED_VIEW
}

- (void)didMoveToWindow
{
  // For RN touches to work we need to instantiate and connect RCTTouchHandler. This only applies
  // for screens that aren't mounted under RCTRootView e.g., modals that are mounted directly to
  // root application window.
  if (self.window != nil && ![self isMountedUnderScreenOrReactRoot]) {
    if (_touchHandler == nil) {
#ifdef RCT_NEW_ARCH_ENABLED
      _touchHandler = [RCTSurfaceTouchHandler new];
#else
      _touchHandler = [[RCTTouchHandler alloc] initWithBridge:_bridge];
#endif
    }
    [_touchHandler attachToView:self];
  } else {
    [_touchHandler detachFromView:self];
  }
}

#ifdef RCT_NEW_ARCH_ENABLED
- (RCTSurfaceTouchHandler *)touchHandler
#else
- (RCTTouchHandler *)touchHandler
#endif
{
  if (_touchHandler != nil) {
    return _touchHandler;
  }
  UIView *parent = [self superview];
  while (parent != nil && ![parent respondsToSelector:@selector(touchHandler)])
    parent = parent.superview;
  if (parent != nil) {
    return [parent performSelector:@selector(touchHandler)];
  }
  return nil;
}

- (void)notifyFinishTransitioning
{
  [_controller notifyFinishTransitioning];
}

- (void)notifyTransitionProgress:(double)progress closing:(BOOL)closing goingForward:(BOOL)goingForward
{
#ifdef RCT_NEW_ARCH_ENABLED
  if (_eventEmitter != nullptr) {
    std::dynamic_pointer_cast<const react::RNSScreenEventEmitter>(_eventEmitter)
        ->onTransitionProgress(react::RNSScreenEventEmitter::OnTransitionProgress{
            .progress = progress, .closing = closing ? 1 : 0, .goingForward = goingForward ? 1 : 0});
  }
  RNSScreenViewEvent *event = [[RNSScreenViewEvent alloc] initWithEventName:@"onTransitionProgress"
                                                                   reactTag:[NSNumber numberWithInt:self.tag]
                                                                   progress:progress
                                                                    closing:closing
                                                               goingForward:goingForward];
  [[RCTBridge currentBridge].eventDispatcher sendEvent:event];
#else
  if (self.onTransitionProgress) {
    self.onTransitionProgress(@{
      @"progress" : @(progress),
      @"closing" : @(closing ? 1 : 0),
      @"goingForward" : @(goingForward ? 1 : 0),
    });
  }
#endif
}

- (void)presentationControllerWillDismiss:(UIPresentationController *)presentationController
{
  // We need to call both "cancel" and "reset" here because RN's gesture recognizer
  // does not handle the scenario when it gets cancelled by other top
  // level gesture recognizer. In this case by the modal dismiss gesture.
  // Because of that, at the moment when this method gets called the React's
  // gesture recognizer is already in FAILED state but cancel events never gets
  // send to JS. Calling "reset" forces RCTTouchHanler to dispatch cancel event.
  // To test this behavior one need to open a dismissable modal and start
  // pulling down starting at some touchable item. Without "reset" the touchable
  // will never go back from highlighted state even when the modal start sliding
  // down.
#ifdef RCT_NEW_ARCH_ENABLED
  [_touchHandler setEnabled:NO];
  [_touchHandler setEnabled:YES];
#else
  [_touchHandler cancel];
#endif
  [_touchHandler reset];
}

- (BOOL)presentationControllerShouldDismiss:(UIPresentationController *)presentationController
{
  if (_preventNativeDismiss) {
    [self notifyDismissCancelledWithDismissCount:1];
    return NO;
  }
  return _gestureEnabled;
}

- (void)presentationControllerDidDismiss:(UIPresentationController *)presentationController
{
  if ([_reactSuperview respondsToSelector:@selector(presentationControllerDidDismiss:)]) {
    [_reactSuperview performSelector:@selector(presentationControllerDidDismiss:) withObject:presentationController];
  }
}

- (BOOL)isModal
{
  return self.stackPresentation != RNSScreenStackPresentationPush;
}

- (RNSScreenStackHeaderConfig *_Nullable)findHeaderConfig
{
  for (UIView *view in self.reactSubviews) {
    if ([view isKindOfClass:RNSScreenStackHeaderConfig.class]) {
      return (RNSScreenStackHeaderConfig *)view;
    }
  }
  return nil;
}

#if !TARGET_OS_TV
/**
 * Updates settings for sheet presentation controller.
 * Note that this method should not be called inside `stackPresentation` setter, because on Paper we don't have
 * guarantee that values of all related props had been updated earlier.
 */
- (void)updateFormSheetPresentationStyle
{
#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && defined(__IPHONE_15_0) && \
    __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_15_0
  if (@available(iOS 15.0, *)) {
    UISheetPresentationController *sheet = _controller.sheetPresentationController;
    if (_stackPresentation == RNSScreenStackPresentationFormSheet && sheet != nil) {
#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && defined(__IPHONE_16_0) && \
    __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_16_0
      if ([_sheetCustomDetents rns_isNotEmpty]) {
        if (@available(iOS 16.0, *)) {
          sheet.detents = [self detentsFromMaxHeightFractions:_sheetCustomDetents];
        }
      } else
#endif // Check for iOS >= 16
      {
        if (_sheetAllowedDetents == RNSScreenDetentTypeMedium) {
          sheet.detents = @[ UISheetPresentationControllerDetent.mediumDetent ];
          if (sheet.selectedDetentIdentifier != UISheetPresentationControllerDetentIdentifierMedium) {
            [sheet animateChanges:^{
              sheet.selectedDetentIdentifier = UISheetPresentationControllerDetentIdentifierMedium;
            }];
          }
        } else if (_sheetAllowedDetents == RNSScreenDetentTypeLarge) {
          sheet.detents = @[ UISheetPresentationControllerDetent.largeDetent ];
          if (sheet.selectedDetentIdentifier != UISheetPresentationControllerDetentIdentifierLarge) {
            [sheet animateChanges:^{
              sheet.selectedDetentIdentifier = UISheetPresentationControllerDetentIdentifierLarge;
            }];
          }
        } else if (_sheetAllowedDetents == RNSScreenDetentTypeAll) {
          sheet.detents = @[
            UISheetPresentationControllerDetent.mediumDetent,
            UISheetPresentationControllerDetent.largeDetent,
          ];
        }
      }

      sheet.prefersScrollingExpandsWhenScrolledToEdge = _sheetExpandsWhenScrolledToEdge;
      sheet.prefersGrabberVisible = _sheetGrabberVisible;
      sheet.preferredCornerRadius =
          _sheetCornerRadius < 0 ? UISheetPresentationControllerAutomaticDimension : _sheetCornerRadius;

      int detentIndex = _sheetCustomLargestUndimmedDetent != nil ? _sheetCustomLargestUndimmedDetent.intValue : -1;
      if (detentIndex != -1 && [_sheetCustomDetents rns_isNotEmpty]) {
        if (detentIndex >= 0 && detentIndex < _sheetCustomDetents.count) {
          sheet.largestUndimmedDetentIdentifier = _sheetCustomLargestUndimmedDetent.stringValue;
        } else {
          sheet.largestUndimmedDetentIdentifier = nil;
        }
      } else if (_sheetLargestUndimmedDetent == RNSScreenDetentTypeMedium) {
        sheet.largestUndimmedDetentIdentifier = UISheetPresentationControllerDetentIdentifierMedium;
      } else if (_sheetLargestUndimmedDetent == RNSScreenDetentTypeLarge) {
        sheet.largestUndimmedDetentIdentifier = UISheetPresentationControllerDetentIdentifierLarge;
      } else if (_sheetLargestUndimmedDetent == RNSScreenDetentTypeAll) {
        sheet.largestUndimmedDetentIdentifier = nil;
      } else {
        RCTLogError(@"Unhandled value of sheetLargestUndimmedDetent passed");
      }
    }
  }
#endif // Check for iOS >= 15
}

#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && defined(__IPHONE_16_0) && \
    __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_16_0
- (NSArray<UISheetPresentationControllerDetent *> *)detentsFromMaxHeightFractions:(NSArray<NSNumber *> *)fractions
    API_AVAILABLE(ios(16.0))
{
  NSMutableArray<UISheetPresentationControllerDetent *> *customDetents =
      [NSMutableArray arrayWithCapacity:fractions.count];
  int detentIndex = 0;
  for (NSNumber *frac in fractions) {
    NSString *ident = [[NSNumber numberWithInt:detentIndex] stringValue];
    [customDetents addObject:[UISheetPresentationControllerDetent
                                 customDetentWithIdentifier:ident
                                                   resolver:^CGFloat(
                                                       id<UISheetPresentationControllerDetentResolutionContext> ctx) {
                                                     return ctx.maximumDetentValue * frac.floatValue;
                                                   }]];
    ++detentIndex;
  }
  return customDetents;
}
#endif // Check for iOS >= 16

#endif // !TARGET_OS_TV

#pragma mark - Fabric specific
#ifdef RCT_NEW_ARCH_ENABLED

- (BOOL)hasHeaderConfig
{
  return _config != nil;
}

+ (react::ComponentDescriptorProvider)componentDescriptorProvider
{
  return react::concreteComponentDescriptorProvider<react::RNSScreenComponentDescriptor>();
}

- (void)mountChildComponentView:(UIView<RCTComponentViewProtocol> *)childComponentView index:(NSInteger)index
{
  if ([childComponentView isKindOfClass:[RNSScreenStackHeaderConfig class]]) {
    _config = (RNSScreenStackHeaderConfig *)childComponentView;
    _config.screenView = self;
  }
  [_reactSubviews insertObject:childComponentView atIndex:index];
  [super mountChildComponentView:childComponentView index:index];
}

- (void)unmountChildComponentView:(UIView<RCTComponentViewProtocol> *)childComponentView index:(NSInteger)index
{
  if ([childComponentView isKindOfClass:[RNSScreenStackHeaderConfig class]]) {
    _config = nil;
  }
  [_reactSubviews removeObject:childComponentView];
  [super unmountChildComponentView:childComponentView index:index];
}

#pragma mark - RCTComponentViewProtocol

- (void)prepareForRecycle
{
  [super prepareForRecycle];
  // TODO: Make sure that there is no edge case when this should be uncommented
  // _controller=nil;
  _dismissed = NO;
  _state.reset();
  _touchHandler = nil;

  // We set this prop to default value here to workaround view-recycling.
  // Let's assume the view has had _stackPresentation == <some modal stack presentation> set
  // before below line was executed. Then, when instantiated again (with the same modal presentation)
  // updateProps:oldProps: method would be called and setter for stack presentation would not be called.
  // This is crucial as in that setter we register `self.controller` as a delegate
  // (UIAdaptivePresentationControllerDelegate) to presentation controller and this leads to buggy modal behaviour as we
  // rely on UIAdaptivePresentationControllerDelegate callbacks. Restoring the default value and then comparing against
  // it in updateProps:oldProps: allows for setter to be called, however if there was some additional logic to execute
  // when stackPresentation is set to "push" the setter would not be triggered.
  _stackPresentation = RNSScreenStackPresentationPush;
}

- (void)updateProps:(react::Props::Shared const &)props oldProps:(react::Props::Shared const &)oldProps
{
  const auto &oldScreenProps = *std::static_pointer_cast<const react::RNSScreenProps>(_props);
  const auto &newScreenProps = *std::static_pointer_cast<const react::RNSScreenProps>(props);

  [self setFullScreenSwipeEnabled:newScreenProps.fullScreenSwipeEnabled];

  [self setGestureEnabled:newScreenProps.gestureEnabled];

  [self setTransitionDuration:[NSNumber numberWithInt:newScreenProps.transitionDuration]];

  [self setHideKeyboardOnSwipe:newScreenProps.hideKeyboardOnSwipe];

  [self setCustomAnimationOnSwipe:newScreenProps.customAnimationOnSwipe];

  [self
      setGestureResponseDistance:[RNSConvert
                                     gestureResponseDistanceDictFromCppStruct:newScreenProps.gestureResponseDistance]];

  [self setPreventNativeDismiss:newScreenProps.preventNativeDismiss];

  [self setActivityStateOrNil:[NSNumber numberWithFloat:newScreenProps.activityState]];

  [self setSwipeDirection:[RNSConvert RNSScreenSwipeDirectionFromCppEquivalent:newScreenProps.swipeDirection]];

#if !TARGET_OS_TV
  if (newScreenProps.statusBarHidden != oldScreenProps.statusBarHidden) {
    [self setStatusBarHidden:newScreenProps.statusBarHidden];
  }

  if (newScreenProps.statusBarStyle != oldScreenProps.statusBarStyle) {
    [self setStatusBarStyle:[RCTConvert
                                RNSStatusBarStyle:RCTNSStringFromStringNilIfEmpty(newScreenProps.statusBarStyle)]];
  }

  if (newScreenProps.statusBarAnimation != oldScreenProps.statusBarAnimation) {
    [self setStatusBarAnimation:[RCTConvert UIStatusBarAnimation:RCTNSStringFromStringNilIfEmpty(
                                                                     newScreenProps.statusBarAnimation)]];
  }

  if (newScreenProps.screenOrientation != oldScreenProps.screenOrientation) {
    [self setScreenOrientation:[RCTConvert UIInterfaceOrientationMask:RCTNSStringFromStringNilIfEmpty(
                                                                          newScreenProps.screenOrientation)]];
  }

  if (newScreenProps.homeIndicatorHidden != oldScreenProps.homeIndicatorHidden) {
    [self setHomeIndicatorHidden:newScreenProps.homeIndicatorHidden];
  }

  [self setSheetGrabberVisible:newScreenProps.sheetGrabberVisible];
  [self setSheetCornerRadius:newScreenProps.sheetCornerRadius];
  [self setSheetExpandsWhenScrolledToEdge:newScreenProps.sheetExpandsWhenScrolledToEdge];

  if (newScreenProps.sheetAllowedDetents != oldScreenProps.sheetAllowedDetents) {
    [self setSheetAllowedDetents:[RNSConvert RNSScreenDetentTypeFromAllowedDetents:newScreenProps.sheetAllowedDetents]];
  }

  if (newScreenProps.sheetLargestUndimmedDetent != oldScreenProps.sheetLargestUndimmedDetent) {
    [self setSheetLargestUndimmedDetent:
              [RNSConvert RNSScreenDetentTypeFromLargestUndimmedDetent:newScreenProps.sheetLargestUndimmedDetent]];
  }
#endif // !TARGET_OS_TV

  // Notice that we compare against _stackPresentation, not oldScreenProps.stackPresentation.
  // See comment in prepareForRecycle method for explanation.
  RNSScreenStackPresentation newStackPresentation =
      [RNSConvert RNSScreenStackPresentationFromCppEquivalent:newScreenProps.stackPresentation];
  if (newStackPresentation != _stackPresentation) {
    [self setStackPresentation:newStackPresentation];
  }

  if (newScreenProps.stackAnimation != oldScreenProps.stackAnimation) {
    [self setStackAnimation:[RNSConvert RNSScreenStackAnimationFromCppEquivalent:newScreenProps.stackAnimation]];
  }

  if (newScreenProps.replaceAnimation != oldScreenProps.replaceAnimation) {
    [self setReplaceAnimation:[RNSConvert RNSScreenReplaceAnimationFromCppEquivalent:newScreenProps.replaceAnimation]];
  }

  if (_stackPresentation == RNSScreenStackPresentationFormSheet) {
    if (newScreenProps.sheetCustomDetents != oldScreenProps.sheetCustomDetents) {
      [self setSheetCustomDetents:[RNSConvert NSNumberMutableArrayFromFloatVector:newScreenProps.sheetCustomDetents]];
    }
    if (newScreenProps.sheetCustomLargestUndimmedDetent != oldScreenProps.sheetCustomLargestUndimmedDetent) {
      [self
          setSheetCustomLargestUndimmedDetent:[NSNumber numberWithInt:newScreenProps.sheetCustomLargestUndimmedDetent]];
    }
  }

  [super updateProps:props oldProps:oldProps];
}

- (void)updateState:(react::State::Shared const &)state oldState:(react::State::Shared const &)oldState
{
  _state = std::static_pointer_cast<const react::RNSScreenShadowNode::ConcreteState>(state);
}

- (void)updateLayoutMetrics:(const react::LayoutMetrics &)layoutMetrics
           oldLayoutMetrics:(const react::LayoutMetrics &)oldLayoutMetrics
{
  _newLayoutMetrics = layoutMetrics;
  _oldLayoutMetrics = oldLayoutMetrics;
  UIViewController *parentVC = self.reactViewController.parentViewController;
  if (parentVC != nil && ![parentVC isKindOfClass:[RNSNavigationController class]]) {
    [super updateLayoutMetrics:layoutMetrics oldLayoutMetrics:oldLayoutMetrics];
  }
  // when screen is mounted under RNSNavigationController it's size is controller
  // by the navigation controller itself. That is, it is set to fill space of
  // the controller. In that case we ignore react layout system from managing
  // the screen dimensions and we wait for the screen VC to update and then we
  // pass the dimensions to ui view manager to take into account when laying out
  // subviews
  // Explanation taken from `reactSetFrame`, which is old arch equivalent of this code.
}

- (void)finalizeUpdates:(RNComponentViewUpdateMask)updateMask
{
#if !TARGET_OS_TV
  [self updateFormSheetPresentationStyle];
#endif // !TARGET_OS_TV
}

#pragma mark - Paper specific
#else

- (void)didSetProps:(NSArray<NSString *> *)changedProps
{
  [super didSetProps:changedProps];
#if !TARGET_OS_TV
  [self updateFormSheetPresentationStyle];
#endif // !TARGET_OS_TV
}

- (void)setPointerEvents:(RCTPointerEvents)pointerEvents
{
  // pointer events settings are managed by the parent screen container, we ignore
  // any attempt of setting that via React props
}

- (void)reactSetFrame:(CGRect)frame
{
  _reactFrame = frame;
  UIViewController *parentVC = self.reactViewController.parentViewController;
  if (parentVC != nil && ![parentVC isKindOfClass:[RNSNavigationController class]]) {
    [super reactSetFrame:frame];
  }
  // when screen is mounted under RNSNavigationController it's size is controller
  // by the navigation controller itself. That is, it is set to fill space of
  // the controller. In that case we ignore react layout system from managing
  // the screen dimensions and we wait for the screen VC to update and then we
  // pass the dimensions to ui view manager to take into account when laying out
  // subviews
}

- (void)invalidate
{
  _controller = nil;
}
#endif

@end

#ifdef RCT_NEW_ARCH_ENABLED
Class<RCTComponentViewProtocol> RNSScreenCls(void)
{
  return RNSScreenView.class;
}
#endif

#pragma mark - RNSScreen

@implementation RNSScreen {
  __weak id _previousFirstResponder;
  CGRect _lastViewFrame;
  RNSScreenView *_initialView;
  UIView *_fakeView;
  CADisplayLink *_animationTimer;
  CGFloat _currentAlpha;
  BOOL _closing;
  BOOL _goingForward;
  int _dismissCount;
  BOOL _isSwiping;
  BOOL _shouldNotify;
}

#pragma mark - Common

- (instancetype)initWithView:(UIView *)view
{
  if (self = [super init]) {
    self.view = view;
    _fakeView = [UIView new];
    _shouldNotify = YES;
#ifdef RCT_NEW_ARCH_ENABLED
    _initialView = (RNSScreenView *)view;
#endif
  }
  return self;
}

// TODO: Find out why this is executed when screen is going out
- (void)viewWillAppear:(BOOL)animated
{
  [super viewWillAppear:animated];
  if (!_isSwiping) {
    [self.screenView notifyWillAppear];
    if (self.transitionCoordinator.isInteractive) {
      // we started dismissing with swipe gesture
      _isSwiping = YES;
    }
  } else {
    // this event is also triggered if we cancelled the swipe.
    // The _isSwiping is still true, but we don't want to notify then
    _shouldNotify = NO;
  }

  [self hideHeaderIfNecessary];
  // as per documentation of these methods
  _goingForward = [self isBeingPresented] || [self isMovingToParentViewController];

  [RNSScreenWindowTraits updateWindowTraits];
  if (_shouldNotify) {
    _closing = NO;
    [self notifyTransitionProgress:0.0 closing:_closing goingForward:_goingForward];
    [self setupProgressNotification];
  }
}

- (void)viewWillDisappear:(BOOL)animated
{
  [super viewWillDisappear:animated];
  // self.navigationController might be null when we are dismissing a modal
  if (!self.transitionCoordinator.isInteractive && self.navigationController != nil) {
    // user might have long pressed ios 14 back button item,
    // so he can go back more than one screen and we need to dismiss more screens in JS stack then.
    // We check it by calculating the difference between the index of currently displayed screen
    // and the index of the target screen, which is the view of topViewController at this point.
    // If the value is lower than 1, it means we are dismissing a modal, or navigating forward, or going back with JS.
    int selfIndex = [self getIndexOfView:self.screenView];
    int targetIndex = [self getIndexOfView:self.navigationController.topViewController.view];
    _dismissCount = selfIndex - targetIndex > 0 ? selfIndex - targetIndex : 1;
  } else {
    _dismissCount = 1;
  }

  // same flow as in viewWillAppear
  if (!_isSwiping) {
    [self.screenView notifyWillDisappear];
    if (self.transitionCoordinator.isInteractive) {
      _isSwiping = YES;
    }
  } else {
    _shouldNotify = NO;
  }

  // as per documentation of these methods
  _goingForward = !([self isBeingDismissed] || [self isMovingFromParentViewController]);

  if (_shouldNotify) {
    _closing = YES;
    [self notifyTransitionProgress:0.0 closing:_closing goingForward:_goingForward];
    [self setupProgressNotification];
  }
}

- (void)viewDidAppear:(BOOL)animated
{
  [super viewDidAppear:animated];
  if (!_isSwiping || _shouldNotify) {
    // we are going forward or dismissing without swipe
    // or successfully swiped back
    [self.screenView notifyAppear];
    [self notifyTransitionProgress:1.0 closing:NO goingForward:_goingForward];
  } else {
    [self.screenView notifyGestureCancel];
  }

  _isSwiping = NO;
  _shouldNotify = YES;
}

- (void)viewDidDisappear:(BOOL)animated
{
  [super viewDidDisappear:animated];
#ifdef RCT_NEW_ARCH_ENABLED
  [self resetViewToScreen];
#endif
  if (self.parentViewController == nil && self.presentingViewController == nil) {
    if (self.screenView.preventNativeDismiss) {
      // if we want to prevent the native dismiss, we do not send dismissal event,
      // but instead call `updateContainer`, which restores the JS navigation stack
      [self.screenView.reactSuperview updateContainer];
      [self.screenView notifyDismissCancelledWithDismissCount:_dismissCount];
    } else {
      // screen dismissed, send event
      [self.screenView notifyDismissedWithCount:_dismissCount];
    }
  }
  // same flow as in viewDidAppear
  if (!_isSwiping || _shouldNotify) {
    [self.screenView notifyDisappear];
    [self notifyTransitionProgress:1.0 closing:YES goingForward:_goingForward];
  }

  _isSwiping = NO;
  _shouldNotify = YES;
#ifdef RCT_NEW_ARCH_ENABLED
#else
  [self traverseForScrollView:self.screenView];
#endif
}

- (void)viewDidLayoutSubviews
{
  [super viewDidLayoutSubviews];

  // The below code makes the screen view adapt dimensions provided by the system. We take these
  // into account only when the view is mounted under RNSNavigationController in which case system
  // provides additional padding to account for possible header, and in the case when screen is
  // shown as a native modal, as the final dimensions of the modal on iOS 12+ are shorter than the
  // screen size
  BOOL isDisplayedWithinUINavController = [self.parentViewController isKindOfClass:[RNSNavigationController class]];
  BOOL isPresentedAsNativeModal = self.parentViewController == nil && self.presentingViewController != nil;

  if (isDisplayedWithinUINavController || isPresentedAsNativeModal) {
#ifdef RCT_NEW_ARCH_ENABLED
    [self.screenView updateBounds];
#else
    if (!CGRectEqualToRect(_lastViewFrame, self.screenView.frame)) {
      _lastViewFrame = self.screenView.frame;
      [((RNSScreenView *)self.viewIfLoaded) updateBounds];
    }
#endif
  }
}

- (void)notifyFinishTransitioning
{
  [_previousFirstResponder becomeFirstResponder];
  _previousFirstResponder = nil;
  // the correct Screen for appearance is set after the transition, same for orientation.
  [RNSScreenWindowTraits updateWindowTraits];
}

- (void)willMoveToParentViewController:(UIViewController *)parent
{
  [super willMoveToParentViewController:parent];
  if (parent == nil) {
    id responder = [self findFirstResponder:self.screenView];
    if (responder != nil) {
      _previousFirstResponder = responder;
    }
  }
}

- (id)findFirstResponder:(UIView *)parent
{
  if (parent.isFirstResponder) {
    return parent;
  }
  for (UIView *subView in parent.subviews) {
    id responder = [self findFirstResponder:subView];
    if (responder != nil) {
      return responder;
    }
  }
  return nil;
}

#pragma mark - transition progress related methods

- (void)setupProgressNotification
{
  if (self.transitionCoordinator != nil) {
    _fakeView.alpha = 0.0;
    [self.transitionCoordinator
        animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
          [[context containerView] addSubview:self->_fakeView];
          self->_fakeView.alpha = 1.0;
          self->_animationTimer = [CADisplayLink displayLinkWithTarget:self selector:@selector(handleAnimation)];
          [self->_animationTimer addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
        }
        completion:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) {
          [self->_animationTimer setPaused:YES];
          [self->_animationTimer invalidate];
          [self->_fakeView removeFromSuperview];
        }];
  }
}

- (void)handleAnimation
{
  if ([[_fakeView layer] presentationLayer] != nil) {
    CGFloat fakeViewAlpha = _fakeView.layer.presentationLayer.opacity;
    if (_currentAlpha != fakeViewAlpha) {
      _currentAlpha = fmax(0.0, fmin(1.0, fakeViewAlpha));
      [self notifyTransitionProgress:_currentAlpha closing:_closing goingForward:_goingForward];
    }
  }
}

- (void)notifyTransitionProgress:(double)progress closing:(BOOL)closing goingForward:(BOOL)goingForward
{
  if ([self.view isKindOfClass:[RNSScreenView class]]) {
    // if the view is already snapshot, there is not sense in sending progress since on JS side
    // the component is already not present
    [(RNSScreenView *)self.view notifyTransitionProgress:progress closing:closing goingForward:goingForward];
  }
}

#if !TARGET_OS_TV
// if the returned vc is a child, it means that it can provide config;
// if the returned vc is self, it means that there is no child for config and self has config to provide,
// so we return self which results in asking self for preferredStatusBarStyle/Animation etc.;
// if the returned vc is nil, it means none of children could provide config and self does not have config either,
// so if it was asked by parent, it will fallback to parent's option, or use default option if it is the top Screen
- (UIViewController *)findChildVCForConfigAndTrait:(RNSWindowTrait)trait includingModals:(BOOL)includingModals
{
  UIViewController *lastViewController = [[self childViewControllers] lastObject];
  if ([self.presentedViewController isKindOfClass:[RNSScreen class]]) {
    lastViewController = self.presentedViewController;
    // we don't want to allow controlling of status bar appearance when we present non-fullScreen modal
    // and it is not possible if `modalPresentationCapturesStatusBarAppearance` is not set to YES, so even
    // if we went into a modal here and ask it, it wouldn't take any effect. For fullScreen modals, the system
    // asks them by itself, so we can stop traversing here.
    // for screen orientation, we need to start the search again from that modal
    return !includingModals
        ? nil
        : [(RNSScreen *)lastViewController findChildVCForConfigAndTrait:trait includingModals:includingModals]
            ?: lastViewController;
  }

  UIViewController *selfOrNil = [self hasTraitSet:trait] ? self : nil;
  if (lastViewController == nil) {
    return selfOrNil;
  } else {
    if ([lastViewController conformsToProtocol:@protocol(RNSViewControllerDelegate)]) {
      // If there is a child (should be VC of ScreenContainer or ScreenStack), that has a child that could provide the
      // trait, we recursively go into its findChildVCForConfig, and if one of the children has the trait set, we return
      // it, otherwise we return self if this VC has config, and nil if it doesn't we use
      // `childViewControllerForStatusBarStyle` for all options since the behavior is the same for all of them
      UIViewController *childScreen = [lastViewController childViewControllerForStatusBarStyle];
      if ([childScreen isKindOfClass:[RNSScreen class]]) {
        return [(RNSScreen *)childScreen findChildVCForConfigAndTrait:trait includingModals:includingModals]
            ?: selfOrNil;
      } else {
        return selfOrNil;
      }
    } else {
      // child vc is not from this library, so we don't ask it
      return selfOrNil;
    }
  }
}

- (BOOL)hasTraitSet:(RNSWindowTrait)trait
{
  switch (trait) {
    case RNSWindowTraitStyle: {
      return self.screenView.hasStatusBarStyleSet;
    }
    case RNSWindowTraitAnimation: {
      return self.screenView.hasStatusBarAnimationSet;
    }
    case RNSWindowTraitHidden: {
      return self.screenView.hasStatusBarHiddenSet;
    }
    case RNSWindowTraitOrientation: {
      return self.screenView.hasOrientationSet;
    }
    case RNSWindowTraitHomeIndicatorHidden: {
      return self.screenView.hasHomeIndicatorHiddenSet;
    }
    default: {
      RCTLogError(@"Unknown trait passed: %d", (int)trait);
    }
  }
  return NO;
}

- (UIViewController *)childViewControllerForStatusBarHidden
{
  UIViewController *vc = [self findChildVCForConfigAndTrait:RNSWindowTraitHidden includingModals:NO];
  return vc == self ? nil : vc;
}

- (BOOL)prefersStatusBarHidden
{
  return self.screenView.statusBarHidden;
}

- (UIViewController *)childViewControllerForStatusBarStyle
{
  UIViewController *vc = [self findChildVCForConfigAndTrait:RNSWindowTraitStyle includingModals:NO];
  return vc == self ? nil : vc;
}

- (UIStatusBarStyle)preferredStatusBarStyle
{
  return [RNSScreenWindowTraits statusBarStyleForRNSStatusBarStyle:self.screenView.statusBarStyle];
}

- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation
{
  UIViewController *vc = [self findChildVCForConfigAndTrait:RNSWindowTraitAnimation includingModals:NO];

  if ([vc isKindOfClass:[RNSScreen class]]) {
    return ((RNSScreen *)vc).screenView.statusBarAnimation;
  }
  return UIStatusBarAnimationFade;
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations
{
  UIViewController *vc = [self findChildVCForConfigAndTrait:RNSWindowTraitOrientation includingModals:YES];

  if ([vc isKindOfClass:[RNSScreen class]]) {
    return ((RNSScreen *)vc).screenView.screenOrientation;
  }
  return UIInterfaceOrientationMaskAllButUpsideDown;
}

- (UIViewController *)childViewControllerForHomeIndicatorAutoHidden
{
  UIViewController *vc = [self findChildVCForConfigAndTrait:RNSWindowTraitHomeIndicatorHidden includingModals:YES];
  return vc == self ? nil : vc;
}

- (BOOL)prefersHomeIndicatorAutoHidden
{
  return self.screenView.homeIndicatorHidden;
}
- (int)getParentChildrenCount
{
  return (int)[[self.screenView.reactSuperview reactSubviews] count];
}
#endif

- (int)getIndexOfView:(UIView *)view
{
  return (int)[[self.screenView.reactSuperview reactSubviews] indexOfObject:view];
}

// since on Fabric the view of controller can be a snapshot of type `UIView`,
// when we want to check props of ScreenView, we need to get them from _initialView
- (RNSScreenView *)screenView
{
#ifdef RCT_NEW_ARCH_ENABLED
  return _initialView;
#else
  return (RNSScreenView *)self.view;
#endif
}

- (void)hideHeaderIfNecessary
{
#if !TARGET_OS_TV
  // On iOS >=13, there is a bug when user transitions from screen with active search bar to screen without header
  // In that case default iOS header will be shown. To fix this we hide header when the screens that appears has header
  // hidden and search bar was active on previous screen. We need to do it asynchronously, because default header is
  // added after viewWillAppear.
  if (@available(iOS 13.0, *)) {
    NSUInteger currentIndex = [self.navigationController.viewControllers indexOfObject:self];

    // we need to check whether reactSubviews array is empty, because on Fabric child nodes are unmounted first ->
    // reactSubviews array may be empty
    RNSScreenStackHeaderConfig *config = [self.screenView findHeaderConfig];
    if (currentIndex > 0 && config != nil) {
      UINavigationItem *prevNavigationItem =
          [self.navigationController.viewControllers objectAtIndex:currentIndex - 1].navigationItem;
      BOOL wasSearchBarActive = prevNavigationItem.searchController.active;

#ifdef RCT_NEW_ARCH_ENABLED
      BOOL shouldHideHeader = !config.show;
#else
      BOOL shouldHideHeader = config.hide;
#endif

      if (wasSearchBarActive && shouldHideHeader) {
        dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, 0);
        dispatch_after(popTime, dispatch_get_main_queue(), ^(void) {
          [self.navigationController setNavigationBarHidden:YES animated:NO];
        });
      }
    }
  }
#endif
}

#ifdef RCT_NEW_ARCH_ENABLED
#pragma mark - Fabric specific

- (void)setViewToSnapshot:(UIView *)snapshot
{
  // modals of native stack seem not to support
  // changing their view by just setting the view
  if (_initialView.stackPresentation != RNSScreenStackPresentationPush) {
    UIView *superView = self.view.superview;
    [self.view removeFromSuperview];
    self.view = snapshot;
    [superView addSubview:self.view];
  } else {
    [self.view removeFromSuperview];
    self.view = snapshot;
  }
}

- (void)resetViewToScreen
{
  if (self.view != _initialView) {
    [self.view removeFromSuperview];
    self.view = _initialView;
  }
}

#else
#pragma mark - Paper specific

- (void)traverseForScrollView:(UIView *)view
{
  if (![[self.view valueForKey:@"_bridge"] valueForKey:@"_jsThread"]) {
    // we don't want to send `scrollViewDidEndDecelerating` event to JS before the JS thread is ready
    return;
  }
  if ([view isKindOfClass:[UIScrollView class]] &&
      ([[(UIScrollView *)view delegate] respondsToSelector:@selector(scrollViewDidEndDecelerating:)])) {
    [[(UIScrollView *)view delegate] scrollViewDidEndDecelerating:(id)view];
  }
  [view.subviews enumerateObjectsUsingBlock:^(__kindof UIView *_Nonnull obj, NSUInteger idx, BOOL *_Nonnull stop) {
    [self traverseForScrollView:obj];
  }];
}
#endif

@end

@implementation RNSScreenManager

RCT_EXPORT_MODULE()

// we want to handle the case when activityState is nil
RCT_REMAP_VIEW_PROPERTY(activityState, activityStateOrNil, NSNumber)
RCT_EXPORT_VIEW_PROPERTY(customAnimationOnSwipe, BOOL);
RCT_EXPORT_VIEW_PROPERTY(fullScreenSwipeEnabled, BOOL);
RCT_EXPORT_VIEW_PROPERTY(gestureEnabled, BOOL)
RCT_EXPORT_VIEW_PROPERTY(gestureResponseDistance, NSDictionary)
RCT_EXPORT_VIEW_PROPERTY(hideKeyboardOnSwipe, BOOL)
RCT_EXPORT_VIEW_PROPERTY(preventNativeDismiss, BOOL)
RCT_EXPORT_VIEW_PROPERTY(replaceAnimation, RNSScreenReplaceAnimation)
RCT_EXPORT_VIEW_PROPERTY(stackPresentation, RNSScreenStackPresentation)
RCT_EXPORT_VIEW_PROPERTY(stackAnimation, RNSScreenStackAnimation)
RCT_EXPORT_VIEW_PROPERTY(swipeDirection, RNSScreenSwipeDirection)
RCT_EXPORT_VIEW_PROPERTY(transitionDuration, NSNumber)

RCT_EXPORT_VIEW_PROPERTY(onAppear, RCTDirectEventBlock);
RCT_EXPORT_VIEW_PROPERTY(onDisappear, RCTDirectEventBlock);
RCT_EXPORT_VIEW_PROPERTY(onDismissed, RCTDirectEventBlock);
RCT_EXPORT_VIEW_PROPERTY(onNativeDismissCancelled, RCTDirectEventBlock);
RCT_EXPORT_VIEW_PROPERTY(onTransitionProgress, RCTDirectEventBlock);
RCT_EXPORT_VIEW_PROPERTY(onWillAppear, RCTDirectEventBlock);
RCT_EXPORT_VIEW_PROPERTY(onWillDisappear, RCTDirectEventBlock);
RCT_EXPORT_VIEW_PROPERTY(onGestureCancel, RCTDirectEventBlock);

#if !TARGET_OS_TV
RCT_EXPORT_VIEW_PROPERTY(screenOrientation, UIInterfaceOrientationMask)
RCT_EXPORT_VIEW_PROPERTY(statusBarAnimation, UIStatusBarAnimation)
RCT_EXPORT_VIEW_PROPERTY(statusBarHidden, BOOL)
RCT_EXPORT_VIEW_PROPERTY(statusBarStyle, RNSStatusBarStyle)
RCT_EXPORT_VIEW_PROPERTY(homeIndicatorHidden, BOOL)

RCT_EXPORT_VIEW_PROPERTY(sheetAllowedDetents, RNSScreenDetentType);
RCT_EXPORT_VIEW_PROPERTY(sheetLargestUndimmedDetent, RNSScreenDetentType);
RCT_EXPORT_VIEW_PROPERTY(sheetCustomLargestUndimmedDetent, NSNumber *);
RCT_EXPORT_VIEW_PROPERTY(sheetGrabberVisible, BOOL);
RCT_EXPORT_VIEW_PROPERTY(sheetCornerRadius, CGFloat);
RCT_EXPORT_VIEW_PROPERTY(sheetExpandsWhenScrolledToEdge, BOOL);
RCT_EXPORT_VIEW_PROPERTY(sheetCustomDetents, NSArray<NSNumber *> *);
#endif

#if !TARGET_OS_TV
// See:
// 1. https://github.com/software-mansion/react-native-screens/pull/1543
// 2. https://github.com/software-mansion/react-native-screens/pull/1596
// This class is instatiated from React Native's internals during application startup
- (instancetype)init
{
  if (self = [super init]) {
    dispatch_async(dispatch_get_main_queue(), ^{
      [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    });
  }
  return self;
}

- (void)dealloc
{
  dispatch_sync(dispatch_get_main_queue(), ^{
    [[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
  });
}
#endif // !TARGET_OS_TV

- (UIView *)view
{
  return [[RNSScreenView alloc] initWithBridge:self.bridge];
}

+ (BOOL)requiresMainQueueSetup
{
  // Returning NO here despite the fact some initialization in -init method dispatches tasks
  // on main queue, because the comments in RN source code states that modules which return YES
  // here will be constructed ahead-of-time -- and this is not required in our case.
  return NO;
}

@end

@implementation RCTConvert (RNSScreen)

RCT_ENUM_CONVERTER(
    RNSScreenStackPresentation,
    (@{
      @"push" : @(RNSScreenStackPresentationPush),
      @"modal" : @(RNSScreenStackPresentationModal),
      @"fullScreenModal" : @(RNSScreenStackPresentationFullScreenModal),
      @"formSheet" : @(RNSScreenStackPresentationFormSheet),
      @"containedModal" : @(RNSScreenStackPresentationContainedModal),
      @"transparentModal" : @(RNSScreenStackPresentationTransparentModal),
      @"containedTransparentModal" : @(RNSScreenStackPresentationContainedTransparentModal)
    }),
    RNSScreenStackPresentationPush,
    integerValue)

RCT_ENUM_CONVERTER(
    RNSScreenStackAnimation,
    (@{
      @"default" : @(RNSScreenStackAnimationDefault),
      @"none" : @(RNSScreenStackAnimationNone),
      @"fade" : @(RNSScreenStackAnimationFade),
      @"fade_from_bottom" : @(RNSScreenStackAnimationFadeFromBottom),
      @"flip" : @(RNSScreenStackAnimationFlip),
      @"simple_push" : @(RNSScreenStackAnimationSimplePush),
      @"slide_from_bottom" : @(RNSScreenStackAnimationSlideFromBottom),
      @"slide_from_right" : @(RNSScreenStackAnimationDefault),
      @"slide_from_left" : @(RNSScreenStackAnimationDefault),
    }),
    RNSScreenStackAnimationDefault,
    integerValue)

RCT_ENUM_CONVERTER(
    RNSScreenReplaceAnimation,
    (@{
      @"push" : @(RNSScreenReplaceAnimationPush),
      @"pop" : @(RNSScreenReplaceAnimationPop),
    }),
    RNSScreenReplaceAnimationPop,
    integerValue)

RCT_ENUM_CONVERTER(
    RNSScreenSwipeDirection,
    (@{
      @"vertical" : @(RNSScreenSwipeDirectionVertical),
      @"horizontal" : @(RNSScreenSwipeDirectionHorizontal),
    }),
    RNSScreenSwipeDirectionHorizontal,
    integerValue)

#if !TARGET_OS_TV
RCT_ENUM_CONVERTER(
    UIStatusBarAnimation,
    (@{
      @"none" : @(UIStatusBarAnimationNone),
      @"fade" : @(UIStatusBarAnimationFade),
      @"slide" : @(UIStatusBarAnimationSlide)
    }),
    UIStatusBarAnimationNone,
    integerValue)

RCT_ENUM_CONVERTER(
    RNSStatusBarStyle,
    (@{
      @"auto" : @(RNSStatusBarStyleAuto),
      @"inverted" : @(RNSStatusBarStyleInverted),
      @"light" : @(RNSStatusBarStyleLight),
      @"dark" : @(RNSStatusBarStyleDark),
    }),
    RNSStatusBarStyleAuto,
    integerValue)

RCT_ENUM_CONVERTER(
    RNSScreenDetentType,
    (@{
      @"large" : @(RNSScreenDetentTypeLarge),
      @"medium" : @(RNSScreenDetentTypeMedium),
      @"all" : @(RNSScreenDetentTypeAll),
    }),
    RNSScreenDetentTypeAll,
    integerValue)

+ (UIInterfaceOrientationMask)UIInterfaceOrientationMask:(id)json
{
  json = [self NSString:json];
  if ([json isEqualToString:@"default"]) {
    return UIInterfaceOrientationMaskAllButUpsideDown;
  } else if ([json isEqualToString:@"all"]) {
    return UIInterfaceOrientationMaskAll;
  } else if ([json isEqualToString:@"portrait"]) {
    return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
  } else if ([json isEqualToString:@"portrait_up"]) {
    return UIInterfaceOrientationMaskPortrait;
  } else if ([json isEqualToString:@"portrait_down"]) {
    return UIInterfaceOrientationMaskPortraitUpsideDown;
  } else if ([json isEqualToString:@"landscape"]) {
    return UIInterfaceOrientationMaskLandscape;
  } else if ([json isEqualToString:@"landscape_left"]) {
    return UIInterfaceOrientationMaskLandscapeLeft;
  } else if ([json isEqualToString:@"landscape_right"]) {
    return UIInterfaceOrientationMaskLandscapeRight;
  }
  return UIInterfaceOrientationMaskAllButUpsideDown;
}
#endif

@end