/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/

#import "RCTUIManager.h"

#import <AVFoundation/AVFoundation.h>
#import <React/RCTSurfacePresenterStub.h>

#import "RCTAssert.h"
#import "RCTBridge+Private.h"
#import "RCTBridge.h"
#import "RCTComponent.h"
#import "RCTComponentData.h"
#import "RCTConvert.h"
#import "RCTDefines.h"
#import "RCTEventDispatcherProtocol.h"
#import "RCTLayoutAnimation.h"
#import "RCTLayoutAnimationGroup.h"
#import "RCTLog.h"
#import "RCTModuleData.h"
#import "RCTModuleMethod.h"
#import "RCTProfile.h"
#import "RCTRootContentView.h"
#import "RCTRootShadowView.h"
#import "RCTRootViewInternal.h"
#import "RCTScrollableProtocol.h"
#import "RCTShadowView+Internal.h"
#import "RCTShadowView.h"
#import "RCTSurfaceRootShadowView.h"
#import "RCTSurfaceRootView.h"
#import "RCTUIManagerObserverCoordinator.h"
#import "RCTUIManagerUtils.h"
#import "RCTUtils.h"
#import "RCTView.h"
#import "RCTViewManager.h"
#import "UIView+React.h"

static void RCTTraverseViewNodes(id<RCTComponent> view, void (^block)(id<RCTComponent>))
{
if (view.reactTag) {
block(view);

for (id<RCTComponent> subview in view.reactSubviews) {
RCTTraverseViewNodes(subview, block);
}
}
}

static NSString *RCTNativeIDRegistryKey(NSString *nativeID, NSNumber *rootTag)
{
if (!nativeID || !rootTag) {
return @"";
}
return [NSString stringWithFormat:@"%@-%@", rootTag, nativeID];
}

NSString *const RCTUIManagerWillUpdateViewsDueToContentSizeMultiplierChangeNotification =
@"RCTUIManagerWillUpdateViewsDueToContentSizeMultiplierChangeNotification";

@implementation RCTUIManager {
// Root views are only mutated on the shadow queue
NSMutableSet<NSNumber *> *_rootViewTags;
NSMutableArray<RCTViewManagerUIBlock> *_pendingUIBlocks;

// Animation
RCTLayoutAnimationGroup *_layoutAnimationGroup; // Main thread only

NSMutableDictionary<NSNumber *, RCTShadowView *> *_shadowViewRegistry; // RCT thread only
NSMutableDictionary<NSNumber *, UIView *> *_viewRegistry; // Main thread only
NSMapTable<NSString *, UIView *> *_nativeIDRegistry;

NSMapTable<RCTShadowView *, NSArray<NSString *> *> *_shadowViewsWithUpdatedProps; // UIManager queue only.
NSHashTable<RCTShadowView *> *_shadowViewsWithUpdatedChildren; // UIManager queue only.

// Keyed by viewName
NSMutableDictionary *_componentDataByName;
}

@synthesize bridge = _bridge;
@synthesize moduleRegistry = _moduleRegistry;

RCT_EXPORT_MODULE()

+ (BOOL)requiresMainQueueSetup
{
return NO;
}

- (void)invalidate
{
/**
* Called on the JS Thread since all modules are invalidated on the JS thread
*/

// This only accessed from the shadow queue
_pendingUIBlocks = nil;

RCTExecuteOnMainQueue(^{
RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"UIManager invalidate", nil);
NSMutableDictionary<NSNumber *, id<RCTComponent>> *viewRegistry =
(NSMutableDictionary<NSNumber *, id<RCTComponent>> *)self->_viewRegistry;
for (NSNumber *rootViewTag in self->_rootViewTags) {
id<RCTComponent> rootView = viewRegistry[rootViewTag];
[self _purgeChildren:[rootView reactSubviews] fromRegistry:viewRegistry];
if ([rootView conformsToProtocol:@protocol(RCTInvalidating)]) {
[(id<RCTInvalidating>)rootView invalidate];
}
}

self->_rootViewTags = nil;
self->_shadowViewRegistry = nil;
self->_viewRegistry = nil;
self->_nativeIDRegistry = nil;
self->_bridge = nil;

[[NSNotificationCenter defaultCenter] removeObserver:self];
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
});
}

- (NSMutableDictionary<NSNumber *, RCTShadowView *> *)shadowViewRegistry
{
// NOTE: this method only exists so that it can be accessed by unit tests
if (!_shadowViewRegistry) {
_shadowViewRegistry = [NSMutableDictionary new];
}
return _shadowViewRegistry;
}

- (NSMutableDictionary<NSNumber *, UIView *> *)viewRegistry
{
// NOTE: this method only exists so that it can be accessed by unit tests
if (!_viewRegistry) {
_viewRegistry = [NSMutableDictionary new];
}
return _viewRegistry;
}

- (NSMapTable *)nativeIDRegistry
{
if (!_nativeIDRegistry) {
_nativeIDRegistry = [NSMapTable strongToWeakObjectsMapTable];
}
return _nativeIDRegistry;
}

- (void)setBridge:(RCTBridge *)bridge
{
RCTEnforceNewArchitectureValidation(
RCTNotAllowedInBridgeless, self, @"RCTUIManager must not be initialized for the new architecture");

RCTAssert(_bridge == nil, @"Should not re-use same UIManager instance");
_bridge = bridge;

_shadowViewRegistry = [NSMutableDictionary new];
_viewRegistry = [NSMutableDictionary new];
_nativeIDRegistry = [NSMapTable strongToWeakObjectsMapTable];

_shadowViewsWithUpdatedProps = [NSMapTable weakToStrongObjectsMapTable];
_shadowViewsWithUpdatedChildren = [NSHashTable weakObjectsHashTable];

// Internal resources
_pendingUIBlocks = [NSMutableArray new];
_rootViewTags = [NSMutableSet new];

_observerCoordinator = [RCTUIManagerObserverCoordinator new];

// Get view managers from bridge=
_componentDataByName = [NSMutableDictionary new];
for (Class moduleClass in _bridge.moduleClasses) {
if ([moduleClass isSubclassOfClass:[RCTViewManager class]]) {
RCTComponentData *componentData = [[RCTComponentData alloc] initWithManagerClass:moduleClass
bridge:_bridge
eventDispatcher:_bridge.eventDispatcher];
_componentDataByName[componentData.name] = componentData;
}
}

// Preload the a11yManager as the RCTUIManager needs it to listen for notification
// By eagerly preloading it in the setBridge method, we make sure that the manager is
// properly initialized in the Main Thread and that we do not incur in any race condition
// or concurrency problem.
id<RCTBridgeModule> a11yManager = [bridge moduleForName:@"AccessibilityManager" lazilyLoadIfNecessary:YES];

// This dispatch_async avoids a deadlock while configuring native modules
dispatch_queue_t accessibilityManagerInitQueue = RCTUIManagerDispatchAccessibilityManagerInitOntoMain()
? dispatch_get_main_queue()
: dispatch_get_global_queue(QOS_CLASS_USER_INTERACTIVE, 0);
dispatch_async(accessibilityManagerInitQueue, ^{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(didReceiveNewContentSizeMultiplier)
name:@"RCTAccessibilityManagerDidUpdateMultiplierNotification"
object:a11yManager];
});
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(namedOrientationDidChange)
name:UIDeviceOrientationDidChangeNotification
object:nil];
[RCTLayoutAnimation initializeStatics];
}

#pragma mark - Event emitting

- (void)didReceiveNewContentSizeMultiplier
{
// Report the event across the bridge.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
id multiplier = [[self->_bridge moduleForName:@"AccessibilityManager"
lazilyLoadIfNecessary:YES] valueForKey:@"multiplier"];
if (multiplier) {
[[_moduleRegistry moduleForName:"EventDispatcher"] sendDeviceEventWithName:@"didUpdateContentSizeMultiplier"
body:multiplier];
}
#pragma clang diagnostic pop

RCTExecuteOnUIManagerQueue(^{
[[NSNotificationCenter defaultCenter]
postNotificationName:RCTUIManagerWillUpdateViewsDueToContentSizeMultiplierChangeNotification
object:self];
[self setNeedsLayout];
});
}

// Names and coordinate system from html5 spec:
// https://developer.mozilla.org/en-US/docs/Web/API/Screen.orientation
// https://developer.mozilla.org/en-US/docs/Web/API/Screen.lockOrientation
static NSDictionary *deviceOrientationEventBody(UIDeviceOrientation orientation)
{
NSString *name;
NSNumber *degrees = @0;
BOOL isLandscape = NO;
switch (orientation) {
case UIDeviceOrientationPortrait:
name = @"portrait-primary";
break;
case UIDeviceOrientationPortraitUpsideDown:
name = @"portrait-secondary";
degrees = @180;
break;
case UIDeviceOrientationLandscapeRight:
name = @"landscape-primary";
degrees = @-90;
isLandscape = YES;
break;
case UIDeviceOrientationLandscapeLeft:
name = @"landscape-secondary";
degrees = @90;
isLandscape = YES;
break;
case UIDeviceOrientationFaceDown:
case UIDeviceOrientationFaceUp:
case UIDeviceOrientationUnknown:
// Unsupported
return nil;
}
return @{
@"name" : name,
@"rotationDegrees" : degrees,
@"isLandscape" : @(isLandscape),
};
}

- (void)namedOrientationDidChange
{
NSDictionary *orientationEvent = deviceOrientationEventBody([UIDevice currentDevice].orientation);
if (!orientationEvent) {
return;
}

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
[[_moduleRegistry moduleForName:"EventDispatcher"] sendDeviceEventWithName:@"namedOrientationDidChange"
body:orientationEvent];
#pragma clang diagnostic pop
}

- (dispatch_queue_t)methodQueue
{
return RCTGetUIManagerQueue();
}

- (void)registerRootViewTag:(NSNumber *)rootTag
{
RCTAssertUIManagerQueue();

RCTAssert(RCTIsReactRootView(rootTag), @"Attempt to register rootTag (%@) which is not actually root tag.", rootTag);

RCTAssert(
![_rootViewTags containsObject:rootTag],
@"Attempt to register rootTag (%@) which was already registered.",
rootTag);

[_rootViewTags addObject:rootTag];

// Registering root shadow view
RCTSurfaceRootShadowView *shadowView = [RCTSurfaceRootShadowView new];
shadowView.reactTag = rootTag;
_shadowViewRegistry[rootTag] = shadowView;

// Registering root view
RCTExecuteOnMainQueue(^{
RCTSurfaceRootView *rootView = [RCTSurfaceRootView new];
rootView.reactTag = rootTag;
self->_viewRegistry[rootTag] = rootView;
});
}

- (void)registerRootView:(RCTRootContentView *)rootView
{
RCTAssertMainQueue();

NSNumber *reactTag = rootView.reactTag;
RCTAssert(RCTIsReactRootView(reactTag), @"View %@ with tag #%@ is not a root view", rootView, reactTag);

UIView *existingView = _viewRegistry[reactTag];
RCTAssert(
existingView == nil || existingView == rootView,
@"Expect all root views to have unique tag. Added %@ twice",
reactTag);

CGSize availableSize = rootView.availableSize;

// Register view
_viewRegistry[reactTag] = rootView;

// Register shadow view
RCTExecuteOnUIManagerQueue(^{
if (!self->_viewRegistry) {
return;
}

RCTRootShadowView *shadowView = [RCTRootShadowView new];
shadowView.availableSize = availableSize;
shadowView.reactTag = reactTag;
shadowView.viewName = NSStringFromClass([rootView class]);
self->_shadowViewRegistry[shadowView.reactTag] = shadowView;
[self->_rootViewTags addObject:reactTag];
});
}

- (NSString *)viewNameForReactTag:(NSNumber *)reactTag
{
RCTAssertUIManagerQueue();
NSString *name = _shadowViewRegistry[reactTag].viewName;
if (name) {
return name;
}

__block UIView *view;
RCTUnsafeExecuteOnMainQueueSync(^{
view = self->_viewRegistry[reactTag];
});

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"

if ([view respondsToSelector:@selector(componentViewName_DO_NOT_USE_THIS_IS_BROKEN)]) {
return [view performSelector:@selector(componentViewName_DO_NOT_USE_THIS_IS_BROKEN)];
}

#pragma clang diagnostic pop
return nil;
}

- (UIView *)viewForReactTag:(NSNumber *)reactTag
{
RCTAssertMainQueue();
UIView *view = [_bridge.surfacePresenter findComponentViewWithTag_DO_NOT_USE_DEPRECATED:reactTag.integerValue];
if (!view) {
view = _viewRegistry[reactTag];
}
return [RCTUIManager paperViewOrCurrentView:view];
}

- (RCTShadowView *)shadowViewForReactTag:(NSNumber *)reactTag
{
RCTAssertUIManagerQueue();
return _shadowViewRegistry[reactTag];
}

- (void)_executeBlockWithShadowView:(void (^)(RCTShadowView *shadowView))block forTag:(NSNumber *)tag
{
RCTAssertMainQueue();

RCTExecuteOnUIManagerQueue(^{
RCTShadowView *shadowView = self->_shadowViewRegistry[tag];

if (shadowView == nil) {
RCTLogInfo(
@"Could not locate shadow view with tag #%@, this is probably caused by a temporary inconsistency between native views and shadow views.",
tag);
return;
}

block(shadowView);
});
}

- (void)setAvailableSize:(CGSize)availableSize forRootView:(UIView *)rootView
{
RCTAssertMainQueue();
[self
_executeBlockWithShadowView:^(RCTShadowView *shadowView) {
RCTAssert(
[shadowView isKindOfClass:[RCTRootShadowView class]], @"Located shadow view is actually not root view.");

RCTRootShadowView *rootShadowView = (RCTRootShadowView *)shadowView;

if (CGSizeEqualToSize(availableSize, rootShadowView.availableSize)) {
return;
}

rootShadowView.availableSize = availableSize;
[self setNeedsLayout];
}
forTag:rootView.reactTag];
}

- (void)setLocalData:(NSObject *)localData forView:(UIView *)view
{
RCTAssertMainQueue();
[self
_executeBlockWithShadowView:^(RCTShadowView *shadowView) {
shadowView.localData = localData;
[self setNeedsLayout];
}
forTag:view.reactTag];
}

- (UIView *)viewForNativeID:(NSString *)nativeID withRootTag:(NSNumber *)rootTag
{
if (!nativeID || !rootTag) {
return nil;
}
UIView *view;
@synchronized(self) {
view = [_nativeIDRegistry objectForKey:RCTNativeIDRegistryKey(nativeID, rootTag)];
}
return view;
}

- (void)setNativeID:(NSString *)nativeID forView:(UIView *)view
{
if (!nativeID || !view) {
return;
}
__weak RCTUIManager *weakSelf = self;
RCTExecuteOnUIManagerQueue(^{
NSNumber *rootTag = [weakSelf shadowViewForReactTag:view.reactTag].rootView.reactTag;
@synchronized(weakSelf) {
[weakSelf.nativeIDRegistry setObject:view forKey:RCTNativeIDRegistryKey(nativeID, rootTag)];
}
});
}

- (void)setSize:(CGSize)size forView:(UIView *)view
{
RCTAssertMainQueue();
[self
_executeBlockWithShadowView:^(RCTShadowView *shadowView) {
if (CGSizeEqualToSize(size, shadowView.size)) {
return;
}

shadowView.size = size;
[self setNeedsLayout];
}
forTag:view.reactTag];
}

- (void)setIntrinsicContentSize:(CGSize)intrinsicContentSize forView:(UIView *)view
{
RCTAssertMainQueue();
[self
_executeBlockWithShadowView:^(RCTShadowView *shadowView) {
if (CGSizeEqualToSize(shadowView.intrinsicContentSize, intrinsicContentSize)) {
return;
}

shadowView.intrinsicContentSize = intrinsicContentSize;
[self setNeedsLayout];
}
forTag:view.reactTag];
}

/**
* Unregisters views from registries
*/
- (void)_purgeChildren:(NSArray<id<RCTComponent>> *)children
fromRegistry:(NSMutableDictionary<NSNumber *, id<RCTComponent>> *)registry
{
for (id<RCTComponent> child in children) {
RCTTraverseViewNodes(registry[child.reactTag], ^(id<RCTComponent> subview) {
RCTAssert(![subview isReactRootView], @"Root views should not be unregistered");
if ([subview conformsToProtocol:@protocol(RCTInvalidating)]) {
[(id<RCTInvalidating>)subview invalidate];
}
[registry removeObjectForKey:subview.reactTag];
});
}
}

- (void)addUIBlock:(RCTViewManagerUIBlock)block
{
RCTAssertUIManagerQueue();

if (!block || !_viewRegistry) {
return;
}

[_pendingUIBlocks addObject:block];
}

- (void)prependUIBlock:(RCTViewManagerUIBlock)block
{
RCTAssertUIManagerQueue();

if (!block || !_viewRegistry) {
return;
}

[_pendingUIBlocks insertObject:block atIndex:0];
}

- (void)setNextLayoutAnimationGroup:(RCTLayoutAnimationGroup *)layoutAnimationGroup
{
RCTAssertMainQueue();

if (_layoutAnimationGroup && ![_layoutAnimationGroup isEqual:layoutAnimationGroup]) {
RCTLogWarn(
@"Warning: Overriding previous layout animation with new one before the first began:\n%@ -> %@.",
[_layoutAnimationGroup description],
[layoutAnimationGroup description]);
}

_layoutAnimationGroup = layoutAnimationGroup;
}

- (RCTViewManagerUIBlock)uiBlockWithLayoutUpdateForRootView:(RCTRootShadowView *)rootShadowView
{
RCTAssertUIManagerQueue();

NSPointerArray *affectedShadowViews = [NSPointerArray weakObjectsPointerArray];
[rootShadowView layoutWithAffectedShadowViews:affectedShadowViews];

if (!affectedShadowViews.count) {
// no frame change results in no UI update block
return nil;
}

typedef struct {
CGRect frame;
UIUserInterfaceLayoutDirection layoutDirection;
BOOL isNew;
BOOL parentIsNew;
RCTDisplayType displayType;
} RCTFrameData;

// Construct arrays then hand off to main thread
NSUInteger count = affectedShadowViews.count;
NSMutableArray *reactTags = [[NSMutableArray alloc] initWithCapacity:count];
NSMutableData *framesData = [[NSMutableData alloc] initWithLength:sizeof(RCTFrameData) * count];
{
NSUInteger index = 0;
RCTFrameData *frameDataArray = (RCTFrameData *)framesData.mutableBytes;
for (RCTShadowView *shadowView in affectedShadowViews) {
reactTags[index] = shadowView.reactTag;
RCTLayoutMetrics layoutMetrics = shadowView.layoutMetrics;
frameDataArray[index++] = (RCTFrameData){
layoutMetrics.frame,
layoutMetrics.layoutDirection,
shadowView.isNewView,
shadowView.superview.isNewView,
layoutMetrics.displayType};
}
}

for (RCTShadowView *shadowView in affectedShadowViews) {
// We have to do this after we build the parentsAreNew array.
shadowView.newView = NO;

NSNumber *reactTag = shadowView.reactTag;

if (shadowView.onLayout) {
CGRect frame = shadowView.layoutMetrics.frame;
shadowView.onLayout(@{
@"layout" : @{
@"x" : @(frame.origin.x),
@"y" : @(frame.origin.y),
@"width" : @(frame.size.width),
@"height" : @(frame.size.height),
},
});
}

if (RCTIsReactRootView(reactTag) && [shadowView isKindOfClass:[RCTRootShadowView class]]) {
CGSize contentSize = shadowView.layoutMetrics.frame.size;

RCTExecuteOnMainQueue(^{
UIView *view = self->_viewRegistry[reactTag];
RCTAssert(view != nil, @"view (for ID %@) not found", reactTag);

RCTRootView *rootView = (RCTRootView *)[view superview];
if ([rootView isKindOfClass:[RCTRootView class]]) {
rootView.intrinsicContentSize = contentSize;
}
});
}
}

// Perform layout (possibly animated)
return ^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
const RCTFrameData *frameDataArray = (const RCTFrameData *)framesData.bytes;
RCTLayoutAnimationGroup *layoutAnimationGroup = uiManager->_layoutAnimationGroup;

__block NSUInteger completionsCalled = 0;

NSInteger index = 0;
for (NSNumber *reactTag in reactTags) {
RCTFrameData frameData = frameDataArray[index++];

UIView *view = viewRegistry[reactTag];
CGRect frame = frameData.frame;

UIUserInterfaceLayoutDirection layoutDirection = frameData.layoutDirection;
BOOL isNew = frameData.isNew;
RCTLayoutAnimation *updatingLayoutAnimation = isNew ? nil : layoutAnimationGroup.updatingLayoutAnimation;
BOOL shouldAnimateCreation = isNew && !frameData.parentIsNew;
RCTLayoutAnimation *creatingLayoutAnimation =
shouldAnimateCreation ? layoutAnimationGroup.creatingLayoutAnimation : nil;
BOOL isHidden = frameData.displayType == RCTDisplayTypeNone;

void (^completion)(BOOL) = ^(BOOL finished) {
completionsCalled++;
if (layoutAnimationGroup.callback && completionsCalled == count) {
layoutAnimationGroup.callback(@[ @(finished) ]);

// It's unsafe to call this callback more than once, so we nil it out here
// to make sure that doesn't happen.
layoutAnimationGroup.callback = nil;
}
};

if (view.reactLayoutDirection != layoutDirection) {
view.reactLayoutDirection = layoutDirection;
}

if (view.isHidden != isHidden) {
view.hidden = isHidden;
}

if (creatingLayoutAnimation) {
// Animate view creation
[view reactSetFrame:frame];

CATransform3D finalTransform = view.layer.transform;
CGFloat finalOpacity = view.layer.opacity;

NSString *property = creatingLayoutAnimation.property;
if ([property isEqualToString:@"scaleXY"]) {
view.layer.transform = CATransform3DMakeScale(0, 0, 0);
} else if ([property isEqualToString:@"scaleX"]) {
view.layer.transform = CATransform3DMakeScale(0, 1, 0);
} else if ([property isEqualToString:@"scaleY"]) {
view.layer.transform = CATransform3DMakeScale(1, 0, 0);
} else if ([property isEqualToString:@"opacity"]) {
view.layer.opacity = 0.0;
} else {
RCTLogError(@"Unsupported layout animation createConfig property %@", creatingLayoutAnimation.property);
}

[creatingLayoutAnimation
performAnimations:^{
if ([property isEqualToString:@"scaleX"] || [property isEqualToString:@"scaleY"] ||
[property isEqualToString:@"scaleXY"]) {
view.layer.transform = finalTransform;
} else if ([property isEqualToString:@"opacity"]) {
view.layer.opacity = finalOpacity;
}
}
withCompletionBlock:completion];

} else if (updatingLayoutAnimation) {
// Animate view update
[updatingLayoutAnimation
performAnimations:^{
[view reactSetFrame:frame];
}
withCompletionBlock:completion];

} else {
// Update without animation
[view reactSetFrame:frame];
completion(YES);
}
}

// Clean up
uiManager->_layoutAnimationGroup = nil;
};
}

/**
* Disassociates children from container. Doesn't remove from registries.
* TODO: use [NSArray getObjects:buffer] to reuse same fast buffer each time.
*
* @returns Array of removed items.
*/
- (NSArray<id<RCTComponent>> *)_childrenToRemoveFromContainer:(id<RCTComponent>)container
atIndices:(NSArray<NSNumber *> *)atIndices
{
// If there are no indices to move or the container has no subviews don't bother
// We support parents with nil subviews so long as they're all nil so this allows for this behavior
if (atIndices.count == 0 || [container reactSubviews].count == 0) {
return nil;
}
// Construction of removed children must be done "up front", before indices are disturbed by removals.
NSMutableArray<id<RCTComponent>> *removedChildren = [NSMutableArray arrayWithCapacity:atIndices.count];
RCTAssert(container != nil, @"container view (for ID %@) not found", container);
for (NSNumber *indexNumber in atIndices) {
NSUInteger index = indexNumber.unsignedIntegerValue;
if (index < [container reactSubviews].count) {
[removedChildren addObject:[container reactSubviews][index]];
}
}
if (removedChildren.count != atIndices.count) {
NSString *message = [NSString stringWithFormat:@"removedChildren count (%tu) was not what we expected (%tu)",
removedChildren.count,
atIndices.count];
RCTFatal(RCTErrorWithMessage(message));
}
return removedChildren;
}

- (void)_removeChildren:(NSArray<id<RCTComponent>> *)children fromContainer:(id<RCTComponent>)container
{
for (id<RCTComponent> removedChild in children) {
[container removeReactSubview:removedChild];
}
}

/**
* Remove subviews from their parent with an animation.
*/
- (void)_removeChildren:(NSArray<UIView *> *)children
fromContainer:(UIView *)container
withAnimation:(RCTLayoutAnimationGroup *)animation
{
RCTAssertMainQueue();
RCTLayoutAnimation *deletingLayoutAnimation = animation.deletingLayoutAnimation;

__block NSUInteger completionsCalled = 0;
for (UIView *removedChild in children) {
void (^completion)(BOOL) = ^(BOOL finished) {
completionsCalled++;

[removedChild removeFromSuperview];

if (animation.callback && completionsCalled == children.count) {
animation.callback(@[ @(finished) ]);

// It's unsafe to call this callback more than once, so we nil it out here
// to make sure that doesn't happen.
animation.callback = nil;
}
};

// Hack: At this moment we have two contradict intents.
// First one: We want to delete the view from view hierarchy.
// Second one: We want to animate this view, which implies the existence of this view in the hierarchy.
// So, we have to remove this view from React's view hierarchy but postpone removing from UIKit's hierarchy.
// Here the problem: the default implementation of `-[UIView removeReactSubview:]` also removes the view from
// UIKit's hierarchy. So, let's temporary restore the view back after removing. To do so, we have to memorize
// original `superview` (which can differ from `container`) and an index of removed view.
UIView *originalSuperview = removedChild.superview;
NSUInteger originalIndex = [originalSuperview.subviews indexOfObjectIdenticalTo:removedChild];
[container removeReactSubview:removedChild];
// Disable user interaction while the view is animating
// since the view is (conceptually) deleted and not supposed to be interactive.
removedChild.userInteractionEnabled = NO;
[originalSuperview insertSubview:removedChild atIndex:originalIndex];

NSString *property = deletingLayoutAnimation.property;
[deletingLayoutAnimation
performAnimations:^{
if ([property isEqualToString:@"scaleXY"]) {
removedChild.layer.transform = CATransform3DMakeScale(0.001, 0.001, 0.001);
} else if ([property isEqualToString:@"scaleX"]) {
removedChild.layer.transform = CATransform3DMakeScale(0.001, 1, 0.001);
} else if ([property isEqualToString:@"scaleY"]) {
removedChild.layer.transform = CATransform3DMakeScale(1, 0.001, 0.001);
} else if ([property isEqualToString:@"opacity"]) {
removedChild.layer.opacity = 0.0;
} else {
RCTLogError(@"Unsupported layout animation createConfig property %@", deletingLayoutAnimation.property);
}
}
withCompletionBlock:completion];
}
}

RCT_EXPORT_METHOD(removeRootView : (nonnull NSNumber *)rootReactTag)
{
RCTShadowView *rootShadowView = _shadowViewRegistry[rootReactTag];
RCTAssert(rootShadowView.superview == nil, @"root view cannot have superview (ID %@)", rootReactTag);
[self _purgeChildren:(NSArray<id<RCTComponent>> *)rootShadowView.reactSubviews
fromRegistry:(NSMutableDictionary<NSNumber *, id<RCTComponent>> *)_shadowViewRegistry];
[_shadowViewRegistry removeObjectForKey:rootReactTag];
[_rootViewTags removeObject:rootReactTag];

[self addUIBlock:^(RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
RCTAssertMainQueue();
UIView *rootView = viewRegistry[rootReactTag];
[uiManager _purgeChildren:(NSArray<id<RCTComponent>> *)rootView.reactSubviews
fromRegistry:(NSMutableDictionary<NSNumber *, id<RCTComponent>> *)viewRegistry];
[(NSMutableDictionary *)viewRegistry removeObjectForKey:rootReactTag];
}];
}

RCT_EXPORT_METHOD(setChildren : (nonnull NSNumber *)containerTag reactTags : (NSArray<NSNumber *> *)reactTags)
{
RCTSetChildren(containerTag, reactTags, (NSDictionary<NSNumber *, id<RCTComponent>> *)_shadowViewRegistry);

[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
RCTSetChildren(containerTag, reactTags, (NSDictionary<NSNumber *, id<RCTComponent>> *)viewRegistry);
}];

[self _shadowViewDidReceiveUpdatedChildren:_shadowViewRegistry[containerTag]];
}

static void RCTSetChildren(
NSNumber *containerTag,
NSArray<NSNumber *> *reactTags,
NSDictionary<NSNumber *, id<RCTComponent>> *registry)
{
id<RCTComponent> container = registry[containerTag];
NSInteger index = 0;
for (NSNumber *reactTag in reactTags) {
id<RCTComponent> view = registry[reactTag];
if (view) {
[container insertReactSubview:view atIndex:index++];
}
}
}

RCT_EXPORT_METHOD(manageChildren
: (nonnull NSNumber *)containerTag moveFromIndices
: (NSArray<NSNumber *> *)moveFromIndices moveToIndices
: (NSArray<NSNumber *> *)moveToIndices addChildReactTags
: (NSArray<NSNumber *> *)addChildReactTags addAtIndices
: (NSArray<NSNumber *> *)addAtIndices removeAtIndices
: (NSArray<NSNumber *> *)removeAtIndices)
{
[self _manageChildren:containerTag
moveFromIndices:moveFromIndices
moveToIndices:moveToIndices
addChildReactTags:addChildReactTags
addAtIndices:addAtIndices
removeAtIndices:removeAtIndices
registry:(NSMutableDictionary<NSNumber *, id<RCTComponent>> *)_shadowViewRegistry];

[self addUIBlock:^(RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
[uiManager _manageChildren:containerTag
moveFromIndices:moveFromIndices
moveToIndices:moveToIndices
addChildReactTags:addChildReactTags
addAtIndices:addAtIndices
removeAtIndices:removeAtIndices
registry:(NSMutableDictionary<NSNumber *, id<RCTComponent>> *)viewRegistry];
}];

[self _shadowViewDidReceiveUpdatedChildren:_shadowViewRegistry[containerTag]];
}

- (void)_manageChildren:(NSNumber *)containerTag
moveFromIndices:(NSArray<NSNumber *> *)moveFromIndices
moveToIndices:(NSArray<NSNumber *> *)moveToIndices
addChildReactTags:(NSArray<NSNumber *> *)addChildReactTags
addAtIndices:(NSArray<NSNumber *> *)addAtIndices
removeAtIndices:(NSArray<NSNumber *> *)removeAtIndices
registry:(NSMutableDictionary<NSNumber *, id<RCTComponent>> *)registry
{
id<RCTComponent> container = registry[containerTag];
RCTAssert(
moveFromIndices.count == moveToIndices.count,
@"moveFromIndices had size %tu, moveToIndices had size %tu",
moveFromIndices.count,
moveToIndices.count);
RCTAssert(addChildReactTags.count == addAtIndices.count, @"there should be at least one React child to add");

// Removes (both permanent and temporary moves) are using "before" indices
NSArray<id<RCTComponent>> *permanentlyRemovedChildren = [self _childrenToRemoveFromContainer:container
atIndices:removeAtIndices];
NSArray<id<RCTComponent>> *temporarilyRemovedChildren = [self _childrenToRemoveFromContainer:container
atIndices:moveFromIndices];

BOOL isUIViewRegistry = ((id)registry == (id)_viewRegistry);
if (isUIViewRegistry && _layoutAnimationGroup.deletingLayoutAnimation) {
[self _removeChildren:(NSArray<UIView *> *)permanentlyRemovedChildren
fromContainer:(UIView *)container
withAnimation:_layoutAnimationGroup];
} else {
[self _removeChildren:permanentlyRemovedChildren fromContainer:container];
}

[self _removeChildren:temporarilyRemovedChildren fromContainer:container];
[self _purgeChildren:permanentlyRemovedChildren fromRegistry:registry];

// Figure out what to insert - merge temporary inserts and adds
NSMutableDictionary *destinationsToChildrenToAdd = [NSMutableDictionary dictionary];
for (NSInteger index = 0, length = temporarilyRemovedChildren.count; index < length; index++) {
destinationsToChildrenToAdd[moveToIndices[index]] = temporarilyRemovedChildren[index];
}

for (NSInteger index = 0, length = addAtIndices.count; index < length; index++) {
id<RCTComponent> view = registry[addChildReactTags[index]];
if (view) {
destinationsToChildrenToAdd[addAtIndices[index]] = view;
}
}

NSArray<NSNumber *> *sortedIndices =
[destinationsToChildrenToAdd.allKeys sortedArrayUsingSelector:@selector(compare:)];
for (NSNumber *reactIndex in sortedIndices) {
[container insertReactSubview:destinationsToChildrenToAdd[reactIndex] atIndex:reactIndex.integerValue];
}
}

RCT_EXPORT_METHOD(createView
: (nonnull NSNumber *)reactTag viewName
: (NSString *)viewName rootTag
: (nonnull NSNumber *)rootTag props
: (NSDictionary *)props)
{
RCTComponentData *componentData = _componentDataByName[viewName];
if (componentData == nil) {
RCTLogError(@"No component found for view with name \"%@\"", viewName);
}

// Register shadow view
RCTShadowView *shadowView = [componentData createShadowViewWithTag:reactTag];
if (shadowView) {
[componentData setProps:props forShadowView:shadowView];
_shadowViewRegistry[reactTag] = shadowView;
RCTShadowView *rootView = _shadowViewRegistry[rootTag];
RCTAssert(
[rootView isKindOfClass:[RCTRootShadowView class]] || [rootView isKindOfClass:[RCTSurfaceRootShadowView class]],
@"Given `rootTag` (%@) does not correspond to a valid root shadow view instance.",
rootTag);
shadowView.rootView = (RCTRootShadowView *)rootView;
}

// Dispatch view creation directly to the main thread instead of adding to
// UIBlocks array. This way, it doesn't get deferred until after layout.
__block UIView *preliminaryCreatedView = nil;

void (^createViewBlock)(void) = ^{
// Do nothing on the second run.
if (preliminaryCreatedView) {
return;
}

preliminaryCreatedView = [componentData createViewWithTag:reactTag rootTag:rootTag];

if (preliminaryCreatedView) {
self->_viewRegistry[reactTag] = preliminaryCreatedView;
}
};

// We cannot guarantee that asynchronously scheduled block will be executed
// *before* a block is added to the regular mounting process (simply because
// mounting process can be managed externally while the main queue is
// locked).
// So, we positively dispatch it asynchronously and double check inside
// the regular mounting block.

RCTExecuteOnMainQueue(createViewBlock);

[self addUIBlock:^(__unused RCTUIManager *uiManager, __unused NSDictionary<NSNumber *, UIView *> *viewRegistry) {
createViewBlock();

if (preliminaryCreatedView) {
[componentData setProps:props forView:preliminaryCreatedView];
}
}];

[self _shadowView:shadowView didReceiveUpdatedProps:[props allKeys]];
}

RCT_EXPORT_METHOD(updateView
: (nonnull NSNumber *)reactTag viewName
: (NSString *)viewName // not always reliable, use shadowView.viewName if available
props
: (NSDictionary *)props)
{
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
RCTComponentData *componentData = _componentDataByName[shadowView.viewName ?: viewName];
[componentData setProps:props forShadowView:shadowView];

[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
UIView *view = viewRegistry[reactTag];
[componentData setProps:props forView:view];
}];

[self _shadowView:shadowView didReceiveUpdatedProps:[props allKeys]];
}

- (void)synchronouslyUpdateViewOnUIThread:(NSNumber *)reactTag viewName:(NSString *)viewName props:(NSDictionary *)props
{
RCTAssertMainQueue();
RCTComponentData *componentData = _componentDataByName[viewName];
UIView *view = _viewRegistry[reactTag];
[componentData setProps:props forView:view];
}

RCT_EXPORT_METHOD(focus : (nonnull NSNumber *)reactTag)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
UIView *newResponder = viewRegistry[reactTag];
[newResponder reactFocus];
}];
}

RCT_EXPORT_METHOD(blur : (nonnull NSNumber *)reactTag)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
UIView *currentResponder = viewRegistry[reactTag];
[currentResponder reactBlur];
}];
}

RCT_EXPORT_METHOD(findSubviewIn
: (nonnull NSNumber *)reactTag atPoint
: (CGPoint)point callback
: (RCTResponseSenderBlock)callback)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
UIView *view = viewRegistry[reactTag];
UIView *target = [view hitTest:point withEvent:nil];
CGRect frame = [target convertRect:target.bounds toView:view];

while (target.reactTag == nil && target.superview != nil) {
target = target.superview;
}

callback(@[
RCTNullIfNil(target.reactTag),
@(frame.origin.x),
@(frame.origin.y),
@(frame.size.width),
@(frame.size.height),
]);
}];
}

RCT_EXPORT_METHOD(dispatchViewManagerCommand
: (nonnull NSNumber *)reactTag commandID
: (id /*(NSString or NSNumber) */)commandID commandArgs
: (NSArray<id> *)commandArgs)
{
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
RCTComponentData *componentData = _componentDataByName[shadowView.viewName];

// Achtung! Achtung!
// This is a remarkably hacky and ugly workaround.
// We need this only temporary for some testing. We need this hack until Fabric fully implements command-execution
// pipeline. This does not affect non-Fabric apps.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"
if (!componentData) {
__block UIView *view;
RCTUnsafeExecuteOnMainQueueSync(^{
view = self->_viewRegistry[reactTag];
});
if ([view respondsToSelector:@selector(componentViewName_DO_NOT_USE_THIS_IS_BROKEN)]) {
NSString *name = [view performSelector:@selector(componentViewName_DO_NOT_USE_THIS_IS_BROKEN)];
componentData = _componentDataByName[[NSString stringWithFormat:@"RCT%@", name]];
}
}
#pragma clang diagnostic pop

Class managerClass = componentData.managerClass;
RCTModuleData *moduleData = [_bridge moduleDataForName:RCTBridgeModuleNameForClass(managerClass)];

id<RCTBridgeMethod> method;
if ([commandID isKindOfClass:[NSNumber class]]) {
method = moduleData.methods[[commandID intValue]];
} else if ([commandID isKindOfClass:[NSString class]]) {
method = moduleData.methodsByName[commandID];
if (method == nil) {
RCTLogError(@"No command found with name \"%@\"", commandID);
}
} else {
RCTLogError(@"dispatchViewManagerCommand must be called with a string or integer command");
return;
}

NSArray *args = [@[ reactTag ] arrayByAddingObjectsFromArray:commandArgs];
[method invokeWithBridge:_bridge module:componentData.manager arguments:args];
}

- (void)batchDidComplete
{
[self _layoutAndMount];
}

/**
* Sets up animations, computes layout, creates UI mounting blocks for computed layout,
* runs these blocks and all other already existing blocks.
*/
- (void)_layoutAndMount
{
[self _dispatchPropsDidChangeEvents];
[self _dispatchChildrenDidChangeEvents];

[_observerCoordinator uiManagerWillPerformLayout:self];

// Perform layout
for (NSNumber *reactTag in _rootViewTags) {
RCTRootShadowView *rootView = (RCTRootShadowView *)_shadowViewRegistry[reactTag];
[self addUIBlock:[self uiBlockWithLayoutUpdateForRootView:rootView]];
}

[_observerCoordinator uiManagerDidPerformLayout:self];

[_observerCoordinator uiManagerWillPerformMounting:self];

[self flushUIBlocksWithCompletion:^{
[self->_observerCoordinator uiManagerDidPerformMounting:self];
}];
}

- (void)flushUIBlocksWithCompletion:(void (^)(void))completion
{
RCTAssertUIManagerQueue();

// First copy the previous blocks into a temporary variable, then reset the
// pending blocks to a new array. This guards against mutation while
// processing the pending blocks in another thread.
NSArray<RCTViewManagerUIBlock> *previousPendingUIBlocks = _pendingUIBlocks;
_pendingUIBlocks = [NSMutableArray new];

if (previousPendingUIBlocks.count == 0) {
completion();
return;
}

__weak typeof(self) weakSelf = self;

void (^mountingBlock)(void) = ^{
typeof(self) strongSelf = weakSelf;

@try {
for (RCTViewManagerUIBlock block in previousPendingUIBlocks) {
RCTComposedViewRegistry *composedViewRegistry =
[[RCTComposedViewRegistry alloc] initWithUIManager:strongSelf andRegistry:strongSelf->_viewRegistry];
block(strongSelf, composedViewRegistry);
}
} @catch (NSException *exception) {
RCTLogError(@"Exception thrown while executing UI block: %@", exception);
}
};

if ([self.observerCoordinator uiManager:self performMountingWithBlock:mountingBlock]) {
completion();
return;
}

// Execute the previously queued UI blocks
RCTProfileBeginFlowEvent();
RCTExecuteOnMainQueue(^{
RCTProfileEndFlowEvent();
RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"-[UIManager flushUIBlocks]", (@{
@"count" : [@(previousPendingUIBlocks.count) stringValue],
}));

mountingBlock();

RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");

RCTExecuteOnUIManagerQueue(completion);
});
}

- (void)setNeedsLayout
{
// If there is an active batch layout will happen when batch finished, so we will wait for that.
// Otherwise we immediately trigger layout.
if (![_bridge isBatchActive] && ![_bridge isLoading]) {
[self _layoutAndMount];
}
}

- (void)_shadowView:(RCTShadowView *)shadowView didReceiveUpdatedProps:(NSArray<NSString *> *)props
{
// We collect a set with changed `shadowViews` and its changed props,
// so we have to maintain this collection properly.
NSArray<NSString *> *previousProps;
if ((previousProps = [_shadowViewsWithUpdatedProps objectForKey:shadowView])) {
// Merging already registered changed props and new ones.
NSMutableSet *set = [NSMutableSet setWithArray:previousProps];
[set addObjectsFromArray:props];
props = [set allObjects];
}

[_shadowViewsWithUpdatedProps setObject:props forKey:shadowView];
}

- (void)_shadowViewDidReceiveUpdatedChildren:(RCTShadowView *)shadowView
{
[_shadowViewsWithUpdatedChildren addObject:shadowView];
}

- (void)_dispatchChildrenDidChangeEvents
{
if (_shadowViewsWithUpdatedChildren.count == 0) {
return;
}

NSHashTable<RCTShadowView *> *shadowViews = _shadowViewsWithUpdatedChildren;
_shadowViewsWithUpdatedChildren = [NSHashTable weakObjectsHashTable];

NSMutableArray *tags = [NSMutableArray arrayWithCapacity:shadowViews.count];

for (RCTShadowView *shadowView in shadowViews) {
[shadowView didUpdateReactSubviews];
[tags addObject:shadowView.reactTag];
}

[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
for (NSNumber *tag in tags) {
UIView<RCTComponent> *view = viewRegistry[tag];
[view didUpdateReactSubviews];
}
}];
}

- (void)_dispatchPropsDidChangeEvents
{
if (_shadowViewsWithUpdatedProps.count == 0) {
return;
}

NSMapTable<RCTShadowView *, NSArray<NSString *> *> *shadowViews = _shadowViewsWithUpdatedProps;
_shadowViewsWithUpdatedProps = [NSMapTable weakToStrongObjectsMapTable];

NSMapTable<NSNumber *, NSArray<NSString *> *> *tags = [NSMapTable strongToStrongObjectsMapTable];

for (RCTShadowView *shadowView in shadowViews) {
NSArray<NSString *> *props = [shadowViews objectForKey:shadowView];
[shadowView didSetProps:props];
[tags setObject:props forKey:shadowView.reactTag];
}

[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
for (NSNumber *tag in tags) {
UIView<RCTComponent> *view = viewRegistry[tag];
[view didSetProps:[tags objectForKey:tag]];
}
}];
}

RCT_EXPORT_METHOD(measure : (nonnull NSNumber *)reactTag callback : (RCTResponseSenderBlock)callback)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
UIView *view = viewRegistry[reactTag];
if (!view) {
// this view was probably collapsed out
RCTLogWarn(@"measure cannot find view with tag #%@", reactTag);
callback(@[]);
return;
}

// If in a <Modal>, rootView will be the root of the modal container.
UIView *rootView = view;
while (rootView.superview && ![rootView isReactRootView]) {
rootView = rootView.superview;
}

// By convention, all coordinates, whether they be touch coordinates, or
// measurement coordinates are with respect to the root view.
CGRect frame = view.frame;
CGRect globalBounds = [view convertRect:view.bounds toView:rootView];

callback(@[
@(frame.origin.x),
@(frame.origin.y),
@(globalBounds.size.width),
@(globalBounds.size.height),
@(globalBounds.origin.x),
@(globalBounds.origin.y),
]);
}];
}

RCT_EXPORT_METHOD(measureInWindow : (nonnull NSNumber *)reactTag callback : (RCTResponseSenderBlock)callback)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
UIView *view = viewRegistry[reactTag];
if (!view) {
// this view was probably collapsed out
RCTLogWarn(@"measure cannot find view with tag #%@", reactTag);
callback(@[]);
return;
}

// Return frame coordinates in window
CGRect windowFrame = [view.window convertRect:view.frame fromView:view.superview];
callback(@[
@(windowFrame.origin.x),
@(windowFrame.origin.y),
@(windowFrame.size.width),
@(windowFrame.size.height),
]);
}];
}

/**
* Returns if the shadow view provided has the `ancestor` shadow view as
* an actual ancestor.
*/
RCT_EXPORT_METHOD(viewIsDescendantOf
: (nonnull NSNumber *)reactTag ancestor
: (nonnull NSNumber *)ancestorReactTag callback
: (RCTResponseSenderBlock)callback)
{
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
RCTShadowView *ancestorShadowView = _shadowViewRegistry[ancestorReactTag];
if (!shadowView) {
return;
}
if (!ancestorShadowView) {
return;
}
BOOL viewIsAncestor = [shadowView viewIsDescendantOf:ancestorShadowView];
callback(@[ @(viewIsAncestor) ]);
}

static void RCTMeasureLayout(RCTShadowView *view, RCTShadowView *ancestor, RCTResponseSenderBlock callback)
{
if (!view) {
return;
}
if (!ancestor) {
return;
}
CGRect result = [view measureLayoutRelativeToAncestor:ancestor];
if (CGRectIsNull(result)) {
RCTLogError(
@"view %@ (tag #%@) is not a descendant of %@ (tag #%@)", view, view.reactTag, ancestor, ancestor.reactTag);
return;
}
CGFloat leftOffset = result.origin.x;
CGFloat topOffset = result.origin.y;
CGFloat width = result.size.width;
CGFloat height = result.size.height;
if (isnan(leftOffset) || isnan(topOffset) || isnan(width) || isnan(height)) {
RCTLogError(@"Attempted to measure layout but offset or dimensions were NaN");
return;
}
callback(@[ @(leftOffset), @(topOffset), @(width), @(height) ]);
}

/**
* Returns the computed recursive offset layout in a dictionary form. The
* returned values are relative to the `ancestor` shadow view. Returns `nil`, if
* the `ancestor` shadow view is not actually an `ancestor`. Does not touch
* anything on the main UI thread. Invokes supplied callback with (x, y, width,
* height).
*/
RCT_EXPORT_METHOD(measureLayout
: (nonnull NSNumber *)reactTag relativeTo
: (nonnull NSNumber *)ancestorReactTag errorCallback
: (__unused RCTResponseSenderBlock)errorCallback callback
: (RCTResponseSenderBlock)callback)
{
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
RCTShadowView *ancestorShadowView = _shadowViewRegistry[ancestorReactTag];
RCTMeasureLayout(shadowView, ancestorShadowView, callback);
}

/**
* JS sets what *it* considers to be the responder. Later, scroll views can use
* this in order to determine if scrolling is appropriate.
*/
RCT_EXPORT_METHOD(setJSResponder
: (nonnull NSNumber *)reactTag blockNativeResponder
: (__unused BOOL)blockNativeResponder)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
_jsResponder = viewRegistry[reactTag];
// Fabric view's are not stored in viewRegistry. We avoid logging a warning in that case.
if (!_jsResponder && !RCTUIManagerTypeForTagIsFabric(reactTag)) {
RCTLogWarn(@"Invalid view set to be the JS responder - tag %@", reactTag);
}
}];
}

RCT_EXPORT_METHOD(clearJSResponder)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, __unused NSDictionary<NSNumber *, UIView *> *viewRegistry) {
_jsResponder = nil;
}];
}

NSMutableDictionary<NSString *, id> *RCTModuleConstantsForDestructuredComponent(
NSMutableDictionary<NSString *, NSDictionary *> *directEvents,
NSMutableDictionary<NSString *, NSDictionary *> *bubblingEvents,
Class managerClass,
NSString *name,
NSDictionary<NSString *, id> *viewConfig)
{
NSMutableDictionary<NSString *, id> *moduleConstants = [NSMutableDictionary new];

// Register which event-types this view dispatches.
// React needs this for the event plugin.
NSMutableDictionary<NSString *, NSDictionary *> *bubblingEventTypes = [NSMutableDictionary new];
NSMutableDictionary<NSString *, NSDictionary *> *directEventTypes = [NSMutableDictionary new];

// Add manager class
moduleConstants[@"Manager"] = RCTBridgeModuleNameForClass(managerClass);

// Add native props
moduleConstants[@"NativeProps"] = viewConfig[@"propTypes"];
moduleConstants[@"baseModuleName"] = viewConfig[@"baseModuleName"];
moduleConstants[@"bubblingEventTypes"] = bubblingEventTypes;
moduleConstants[@"directEventTypes"] = directEventTypes;
// In the Old Architecture the "Commands" and "Constants" properties of view manager config are populated by
// lazifyViewManagerConfig function in JS. This fuction uses NativeModules global object that is not available in the
// New Architecture. To make native view configs work in the New Architecture we will populate these properties in
// native.
if (RCTGetUseNativeViewConfigsInBridgelessMode()) {
moduleConstants[@"Commands"] = viewConfig[@"Commands"];
moduleConstants[@"Constants"] = viewConfig[@"Constants"];
}
// Add direct events
for (NSString *eventName in viewConfig[@"directEvents"]) {
if (!directEvents[eventName]) {
directEvents[eventName] = @{
@"registrationName" : [eventName stringByReplacingCharactersInRange:(NSRange){0, 3} withString:@"on"],
};
}
directEventTypes[eventName] = directEvents[eventName];
if (RCT_DEBUG && bubblingEvents[eventName]) {
RCTLogError(
@"Component '%@' re-registered bubbling event '%@' as a "
"direct event",
name,
eventName);
}
}

// Add bubbling events
for (NSString *eventName in viewConfig[@"bubblingEvents"]) {
if (!bubblingEvents[eventName]) {
NSString *bubbleName = [eventName stringByReplacingCharactersInRange:(NSRange){0, 3} withString:@"on"];
bubblingEvents[eventName] = @{
@"phasedRegistrationNames" : @{
@"bubbled" : bubbleName,
@"captured" : [bubbleName stringByAppendingString:@"Capture"],
}
};
}
bubblingEventTypes[eventName] = bubblingEvents[eventName];
if (RCT_DEBUG && directEvents[eventName]) {
RCTLogError(
@"Component '%@' re-registered direct event '%@' as a "
"bubbling event",
name,
eventName);
}
}

// Add capturing events (added as bubbling events but with the 'skipBubbling' flag)
for (NSString *eventName in viewConfig[@"capturingEvents"]) {
if (!bubblingEvents[eventName]) {
NSString *bubbleName = [eventName stringByReplacingCharactersInRange:(NSRange){0, 3} withString:@"on"];
bubblingEvents[eventName] = @{
@"phasedRegistrationNames" : @{
@"bubbled" : bubbleName,
@"captured" : [bubbleName stringByAppendingString:@"Capture"],
@"skipBubbling" : @YES
}
};
}
bubblingEventTypes[eventName] = bubblingEvents[eventName];
if (RCT_DEBUG && directEvents[eventName]) {
RCTLogError(
@"Component '%@' re-registered direct event '%@' as a "
"bubbling event",
name,
eventName);
}
}

return moduleConstants;
}

static NSMutableDictionary<NSString *, id> *moduleConstantsForComponentData(
NSMutableDictionary<NSString *, NSDictionary *> *directEvents,
NSMutableDictionary<NSString *, NSDictionary *> *bubblingEvents,
RCTComponentData *componentData)
{
return RCTModuleConstantsForDestructuredComponent(
directEvents, bubblingEvents, componentData.managerClass, componentData.name, componentData.viewConfig);
}

- (NSDictionary<NSString *, id> *)constantsToExport
{
return [self getConstants];
}

- (NSDictionary<NSString *, id> *)getConstants
{
NSMutableDictionary<NSString *, NSDictionary *> *constants = [NSMutableDictionary new];
NSMutableDictionary<NSString *, NSDictionary *> *directEvents = [NSMutableDictionary new];
NSMutableDictionary<NSString *, NSDictionary *> *bubblingEvents = [NSMutableDictionary new];

[_componentDataByName
enumerateKeysAndObjectsUsingBlock:^(NSString *name, RCTComponentData *componentData, __unused BOOL *stop) {
RCTAssert(!constants[name], @"UIManager already has constants for %@", componentData.name);
NSMutableDictionary<NSString *, id> *moduleConstants =
moduleConstantsForComponentData(directEvents, bubblingEvents, componentData);
constants[name] = moduleConstants;
}];

return constants;
}

RCT_EXPORT_BLOCKING_SYNCHRONOUS_METHOD(lazilyLoadView : (NSString *)name)
{
if (_componentDataByName[name]) {
return @{};
}

id<RCTBridgeDelegate> delegate = self.bridge.delegate;
if (![delegate respondsToSelector:@selector(bridge:didNotFindModule:)]) {
return @{};
}

NSString *moduleName = name;
BOOL result = [delegate bridge:self.bridge didNotFindModule:moduleName];
if (!result) {
moduleName = [name stringByAppendingString:@"Manager"];
result = [delegate bridge:self.bridge didNotFindModule:moduleName];
}
if (!result) {
return @{};
}

id module = [self.bridge moduleForName:moduleName lazilyLoadIfNecessary:RCTTurboModuleEnabled()];
if (module == nil) {
// There is all sorts of code in this codebase that drops prefixes.
//
// If we didn't find a module, it's possible because it's stored under a key
// which had RCT Prefixes stripped. Lets check one more time...
module = [self.bridge moduleForName:RCTDropReactPrefixes(moduleName) lazilyLoadIfNecessary:RCTTurboModuleEnabled()];
}

if (!module) {
return @{};
}

RCTComponentData *componentData = [[RCTComponentData alloc] initWithManagerClass:[module class]
bridge:self.bridge
eventDispatcher:self.bridge.eventDispatcher];
_componentDataByName[componentData.name] = componentData;
NSMutableDictionary *directEvents = [NSMutableDictionary new];
NSMutableDictionary *bubblingEvents = [NSMutableDictionary new];
NSMutableDictionary<NSString *, id> *moduleConstants =
moduleConstantsForComponentData(directEvents, bubblingEvents, componentData);
return @{
@"viewConfig" : moduleConstants,
};
}

RCT_EXPORT_METHOD(configureNextLayoutAnimation
: (NSDictionary *)config withCallback
: (RCTResponseSenderBlock)callback errorCallback
: (__unused RCTResponseSenderBlock)errorCallback)
{
RCTLayoutAnimationGroup *layoutAnimationGroup = [[RCTLayoutAnimationGroup alloc] initWithConfig:config
callback:callback];

[self addUIBlock:^(RCTUIManager *uiManager, __unused NSDictionary<NSNumber *, UIView *> *viewRegistry) {
[uiManager setNextLayoutAnimationGroup:layoutAnimationGroup];
}];
}

- (void)rootViewForReactTag:(NSNumber *)reactTag withCompletion:(void (^)(UIView *view))completion
{
RCTAssertMainQueue();
RCTAssert(completion != nil, @"Attempted to resolve rootView for tag %@ without a completion block", reactTag);

if (reactTag == nil) {
completion(nil);
return;
}

RCTExecuteOnUIManagerQueue(^{
NSNumber *rootTag = [self shadowViewForReactTag:reactTag].rootView.reactTag;
RCTExecuteOnMainQueue(^{
UIView *rootView = nil;
if (rootTag != nil) {
rootView = [self viewForReactTag:rootTag];
}
completion(rootView);
});
});
}

static UIView *_jsResponder;

+ (UIView *)JSResponder
{
RCTErrorNewArchitectureValidation(
RCTNotAllowedInFabricWithoutLegacy, @"RCTUIManager", @"Please migrate this legacy surface to Fabric.");
return _jsResponder;
}

+ (UIView *)paperViewOrCurrentView:(UIView *)view
{
if ([view respondsToSelector:@selector(paperView)]) {
return [view performSelector:@selector(paperView)];
}
return view;
}

- (void)removeViewFromRegistry:(NSNumber *)reactTag
{
[_viewRegistry removeObjectForKey:reactTag];
}

@end

@implementation RCTBridge (RCTUIManager)

- (RCTUIManager *)uiManager
{
return [self moduleForClass:[RCTUIManager class]];
}

@end

@implementation RCTComposedViewRegistry {
__weak RCTUIManager *_uiManager;
NSDictionary<NSNumber *, UIView *> *_registry;
}

- (instancetype)initWithUIManager:(RCTUIManager *)uiManager andRegistry:(NSDictionary<NSNumber *, UIView *> *)registry
{
self = [super init];
if (self) {
_uiManager = uiManager;
_registry = registry;
}
return self;
}

- (NSUInteger)count
{
return self->_registry.count;
}

- (NSEnumerator *)keyEnumerator
{
return self->_registry.keyEnumerator;
}

- (id)objectForKey:(id)key
{
if (![key isKindOfClass:[NSNumber class]]) {
return NULL;
}

NSNumber *index = (NSNumber *)key;
UIView *view = _registry[index];
if (view) {
return [RCTUIManager paperViewOrCurrentView:view];
}
view = [_uiManager viewForReactTag:index];
if (view) {
return [RCTUIManager paperViewOrCurrentView:view];
}
return NULL;
}

- (void)removeObjectForKey:(id)key
{
if (![key isKindOfClass:[NSNumber class]]) {
return;
}

NSNumber *tag = (NSNumber *)key;

if (_registry[key]) {
NSMutableDictionary *mutableRegistry = (NSMutableDictionary *)_registry;
[mutableRegistry removeObjectForKey:tag];
} else if ([_uiManager viewForReactTag:tag]) {
[_uiManager removeViewFromRegistry:tag];
}
}

@end