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react-native/React/Modules/RCTUIManager.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTUIManager.h"
#import <AVFoundation/AVFoundation.h>
#import <yoga/Yoga.h>
#import "RCTAccessibilityManager.h"
#import "RCTAnimationType.h"
#import "RCTAssert.h"
#import "RCTBridge+Private.h"
#import "RCTBridge.h"
#import "RCTComponent.h"
#import "RCTComponentData.h"
#import "RCTConvert.h"
#import "RCTDefines.h"
#import "RCTEventDispatcher.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.h"
#import "RCTUIManagerObserverCoordinator.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);
}
}
}
char *const RCTUIManagerQueueName = "com.facebook.react.ShadowQueue";
NSString *const RCTUIManagerWillUpdateViewsDueToContentSizeMultiplierChangeNotification = @"RCTUIManagerWillUpdateViewsDueToContentSizeMultiplierChangeNotification";
NSString *const RCTUIManagerDidRegisterRootViewNotification = @"RCTUIManagerDidRegisterRootViewNotification";
NSString *const RCTUIManagerDidRemoveRootViewNotification = @"RCTUIManagerDidRemoveRootViewNotification";
NSString *const RCTUIManagerRootViewKey = @"RCTUIManagerRootViewKey";
@implementation RCTUIManager
{
// Root views are only mutated on the shadow queue
NSMutableSet<NSNumber *> *_rootViewTags;
NSMutableArray<RCTViewManagerUIBlock> *_pendingUIBlocks;
// Animation
RCTLayoutAnimationGroup *_layoutAnimationGroup; // Main thread only
NSMutableSet<UIView *> *_viewsToBeDeleted; // Main thread only
NSMutableDictionary<NSNumber *, RCTShadowView *> *_shadowViewRegistry; // RCT thread only
NSMutableDictionary<NSNumber *, UIView *> *_viewRegistry; // Main thread only
// Keyed by viewName
NSDictionary *_componentDataByName;
NSMutableSet<id<RCTComponent>> *_bridgeTransactionListeners;
}
@synthesize bridge = _bridge;
RCT_EXPORT_MODULE()
- (void)didReceiveNewContentSizeMultiplier
{
// Report the event across the bridge.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
[_bridge.eventDispatcher sendDeviceEventWithName:@"didUpdateContentSizeMultiplier"
body:@([_bridge.accessibilityManager multiplier])];
#pragma clang diagnostic pop
dispatch_async(RCTGetUIManagerQueue(), ^{
[[NSNotificationCenter defaultCenter] postNotificationName:RCTUIManagerWillUpdateViewsDueToContentSizeMultiplierChangeNotification
object:self];
[self setNeedsLayout];
});
}
- (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;
dispatch_async(dispatch_get_main_queue(), ^{
RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"UIManager invalidate", nil);
for (NSNumber *rootViewTag in self->_rootViewTags) {
[(id<RCTInvalidating>)self->_viewRegistry[rootViewTag] invalidate];
}
self->_rootViewTags = nil;
self->_shadowViewRegistry = nil;
self->_viewRegistry = nil;
self->_bridgeTransactionListeners = 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;
}
- (void)setBridge:(RCTBridge *)bridge
{
RCTAssert(_bridge == nil, @"Should not re-use same UIIManager instance");
_bridge = bridge;
_shadowViewRegistry = [NSMutableDictionary new];
_viewRegistry = [NSMutableDictionary new];
// Internal resources
_pendingUIBlocks = [NSMutableArray new];
_rootViewTags = [NSMutableSet new];
_bridgeTransactionListeners = [NSMutableSet new];
_observerCoordinator = [RCTUIManagerObserverCoordinator new];
_viewsToBeDeleted = [NSMutableSet new];
// Get view managers from bridge
NSMutableDictionary *componentDataByName = [NSMutableDictionary new];
for (Class moduleClass in _bridge.moduleClasses) {
if ([moduleClass isSubclassOfClass:[RCTViewManager class]]) {
RCTComponentData *componentData = [[RCTComponentData alloc] initWithManagerClass:moduleClass
bridge:_bridge];
componentDataByName[componentData.name] = componentData;
}
}
_componentDataByName = [componentDataByName copy];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(didReceiveNewContentSizeMultiplier)
name:RCTAccessibilityManagerDidUpdateMultiplierNotification
object:_bridge.accessibilityManager];
[RCTLayoutAnimation initializeStatics];
}
dispatch_queue_t RCTGetUIManagerQueue(void)
{
static dispatch_queue_t shadowQueue;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if ([NSOperation instancesRespondToSelector:@selector(qualityOfService)]) {
dispatch_queue_attr_t attr = dispatch_queue_attr_make_with_qos_class(DISPATCH_QUEUE_SERIAL, QOS_CLASS_USER_INTERACTIVE, 0);
shadowQueue = dispatch_queue_create(RCTUIManagerQueueName, attr);
} else {
shadowQueue = dispatch_queue_create(RCTUIManagerQueueName, DISPATCH_QUEUE_SERIAL);
dispatch_set_target_queue(shadowQueue, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0));
}
});
return shadowQueue;
}
BOOL RCTIsUIManagerQueue()
{
static void *queueKey = &queueKey;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
dispatch_queue_set_specific(RCTGetUIManagerQueue(), queueKey, queueKey, NULL);
});
return dispatch_get_specific(queueKey) == queueKey;
}
- (dispatch_queue_t)methodQueue
{
return RCTGetUIManagerQueue();
}
- (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
dispatch_async(RCTGetUIManagerQueue(), ^{
if (!self->_viewRegistry) {
return;
}
RCTRootShadowView *shadowView = [RCTRootShadowView new];
shadowView.availableSize = availableSize;
shadowView.reactTag = reactTag;
shadowView.backgroundColor = rootView.backgroundColor;
shadowView.viewName = NSStringFromClass([rootView class]);
self->_shadowViewRegistry[shadowView.reactTag] = shadowView;
[self->_rootViewTags addObject:reactTag];
});
[[NSNotificationCenter defaultCenter] postNotificationName:RCTUIManagerDidRegisterRootViewNotification
object:self
userInfo:@{RCTUIManagerRootViewKey: rootView}];
}
- (NSString *)viewNameForReactTag:(NSNumber *)reactTag
{
RCTAssertThread(RCTGetUIManagerQueue(), @"viewNameForReactTag can only be called from the shadow queue");
return _shadowViewRegistry[reactTag].viewName;
}
- (UIView *)viewForReactTag:(NSNumber *)reactTag
{
RCTAssertMainQueue();
return _viewRegistry[reactTag];
}
- (RCTShadowView *)shadowViewForReactTag:(NSNumber *)reactTag
{
RCTAssertUIManagerQueue();
return _shadowViewRegistry[reactTag];
}
- (void)setAvailableSize:(CGSize)availableSize forRootView:(UIView *)rootView
{
RCTAssertMainQueue();
NSNumber *reactTag = rootView.reactTag;
dispatch_async(RCTGetUIManagerQueue(), ^{
RCTRootShadowView *shadowView = (RCTRootShadowView *)self->_shadowViewRegistry[reactTag];
RCTAssert(shadowView != nil, @"Could not locate shadow view with tag #%@", reactTag);
RCTAssert([shadowView isKindOfClass:[RCTRootShadowView class]], @"Located shadow view (with tag #%@) is actually not root view.", reactTag);
if (CGSizeEqualToSize(availableSize, shadowView.availableSize)) {
return;
}
shadowView.availableSize = availableSize;
[self setNeedsLayout];
});
}
/**
* TODO(yuwang): implement the nativeID functionality in a more efficient way
* instead of searching the whole view tree
*/
- (UIView *)viewForNativeID:(NSString *)nativeID withRootTag:(NSNumber *)rootTag
{
RCTAssertMainQueue();
UIView *view = [self viewForReactTag:rootTag];
return [self _lookupViewForNativeID:nativeID inView:view];
}
- (UIView *)_lookupViewForNativeID:(NSString *)nativeID inView:(UIView *)view
{
RCTAssertMainQueue();
if (view != nil && [nativeID isEqualToString:view.nativeID]) {
return view;
}
for (UIView *subview in view.subviews) {
UIView *targetView = [self _lookupViewForNativeID:nativeID inView:subview];
if (targetView != nil) {
return targetView;
}
}
return nil;
}
- (void)setSize:(CGSize)size forView:(UIView *)view
{
RCTAssertMainQueue();
NSNumber *reactTag = view.reactTag;
dispatch_async(RCTGetUIManagerQueue(), ^{
RCTShadowView *shadowView = self->_shadowViewRegistry[reactTag];
RCTAssert(shadowView != nil, @"Could not locate shadow view with tag #%@", reactTag);
if (CGSizeEqualToSize(size, shadowView.size)) {
return;
}
shadowView.size = size;
[self setNeedsLayout];
});
}
- (void)setIntrinsicContentSize:(CGSize)size forView:(UIView *)view
{
RCTAssertMainQueue();
NSNumber *reactTag = view.reactTag;
dispatch_async(RCTGetUIManagerQueue(), ^{
RCTShadowView *shadowView = self->_shadowViewRegistry[reactTag];
RCTAssert(shadowView != nil, @"Could not locate view with tag #%@", reactTag);
if (!CGSizeEqualToSize(shadowView.intrinsicContentSize, size)) {
shadowView.intrinsicContentSize = size;
[self setNeedsLayout];
}
});
}
- (void)setBackgroundColor:(UIColor *)color forView:(UIView *)view
{
RCTAssertMainQueue();
NSNumber *reactTag = view.reactTag;
dispatch_async(RCTGetUIManagerQueue(), ^{
if (!self->_viewRegistry) {
return;
}
RCTShadowView *shadowView = self->_shadowViewRegistry[reactTag];
RCTAssert(shadowView != nil, @"Could not locate root view with tag #%@", reactTag);
shadowView.backgroundColor = color;
[self _amendPendingUIBlocksWithStylePropagationUpdateForShadowView:shadowView];
[self flushUIBlocks];
});
}
/**
* 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];
if (registry == (NSMutableDictionary<NSNumber *, id<RCTComponent>> *)self->_viewRegistry) {
[self->_bridgeTransactionListeners removeObject:subview];
}
});
}
}
- (void)addUIBlock:(RCTViewManagerUIBlock)block
{
RCTAssertThread(RCTGetUIManagerQueue(),
@"-[RCTUIManager addUIBlock:] should only be called from the "
"UIManager's queue (get this using `RCTGetUIManagerQueue()`)");
if (!block || !_viewRegistry) {
return;
}
[_pendingUIBlocks addObject:block];
}
- (void)prependUIBlock:(RCTViewManagerUIBlock)block
{
RCTAssertThread(RCTGetUIManagerQueue(),
@"-[RCTUIManager prependUIBlock:] should only be called from the "
"UIManager's queue (get this using `RCTGetUIManagerQueue()`)");
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
{
RCTAssert(!RCTIsMainQueue(), @"Should be called on shadow queue");
// This is nuanced. In the JS thread, we create a new update buffer
// `frameTags`/`frames` that is created/mutated in the JS thread. We access
// these structures in the UI-thread block. `NSMutableArray` is not thread
// safe so we rely on the fact that we never mutate it after it's passed to
// the main thread.
NSSet<RCTShadowView *> *viewsWithNewFrames = [rootShadowView collectViewsWithUpdatedFrames];
if (!viewsWithNewFrames.count) {
// no frame change results in no UI update block
return nil;
}
typedef struct {
CGRect frame;
UIUserInterfaceLayoutDirection layoutDirection;
BOOL isNew;
BOOL parentIsNew;
BOOL isHidden;
} RCTFrameData;
// Construct arrays then hand off to main thread
NSUInteger count = viewsWithNewFrames.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 viewsWithNewFrames) {
reactTags[index] = shadowView.reactTag;
frameDataArray[index++] = (RCTFrameData){
shadowView.frame,
shadowView.effectiveLayoutDirection,
shadowView.isNewView,
shadowView.superview.isNewView,
shadowView.isHidden,
};
}
}
// These are blocks to be executed on each view, immediately after
// reactSetFrame: has been called. Note that if reactSetFrame: is not called,
// these won't be called either, so this is not a suitable place to update
// properties that aren't related to layout.
NSMutableDictionary<NSNumber *, RCTViewManagerUIBlock> *updateBlocks =
[NSMutableDictionary new];
for (RCTShadowView *shadowView in viewsWithNewFrames) {
// We have to do this after we build the parentsAreNew array.
shadowView.newView = NO;
NSNumber *reactTag = shadowView.reactTag;
RCTViewManager *manager = [_componentDataByName[shadowView.viewName] manager];
RCTViewManagerUIBlock block = [manager uiBlockToAmendWithShadowView:shadowView];
if (block) {
updateBlocks[reactTag] = block;
}
if (shadowView.onLayout) {
CGRect frame = shadowView.frame;
shadowView.onLayout(@{
@"layout": @{
@"x": @(frame.origin.x),
@"y": @(frame.origin.y),
@"width": @(frame.size.width),
@"height": @(frame.size.height),
},
});
}
if (RCTIsReactRootView(reactTag)) {
CGSize contentSize = shadowView.frame.size;
dispatch_async(dispatch_get_main_queue(), ^{
UIView *view = self->_viewRegistry[reactTag];
RCTAssert(view != nil, @"view (for ID %@) not found", reactTag);
RCTRootView *rootView = (RCTRootView *)[view superview];
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;
BOOL isHidden = frameData.isHidden;
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;
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.isHidden != isHidden) {
view.hidden = isHidden;
}
if (view.reactLayoutDirection != layoutDirection) {
view.reactLayoutDirection = layoutDirection;
}
RCTViewManagerUIBlock updateBlock = updateBlocks[reactTag];
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:@"opacity"]) {
view.layer.opacity = 0.0;
} else {
RCTLogError(@"Unsupported layout animation createConfig property %@",
creatingLayoutAnimation.property);
}
[creatingLayoutAnimation performAnimations:^{
if ([property isEqualToString:@"scaleXY"]) {
view.layer.transform = finalTransform;
} else if ([property isEqualToString:@"opacity"]) {
view.layer.opacity = finalOpacity;
}
if (updateBlock) {
updateBlock(self, viewRegistry);
}
} withCompletionBlock:completion];
} else if (updatingLayoutAnimation) {
// Animate view update
[updatingLayoutAnimation performAnimations:^{
[view reactSetFrame:frame];
if (updateBlock) {
updateBlock(self, viewRegistry);
}
} withCompletionBlock:completion];
} else {
// Update without animation
[view reactSetFrame:frame];
if (updateBlock) {
updateBlock(self, viewRegistry);
}
completion(YES);
}
}
// Clean up
uiManager->_layoutAnimationGroup = nil;
};
}
- (void)_amendPendingUIBlocksWithStylePropagationUpdateForShadowView:(RCTShadowView *)topView
{
NSMutableSet<RCTApplierBlock> *applierBlocks = [NSMutableSet setWithCapacity:1];
[topView collectUpdatedProperties:applierBlocks parentProperties:@{}];
if (applierBlocks.count) {
[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
for (RCTApplierBlock block in applierBlocks) {
block(viewRegistry);
}
}];
}
}
/**
* A method to be called from JS, which takes a container ID and then releases
* all subviews for that container upon receipt.
*/
RCT_EXPORT_METHOD(removeSubviewsFromContainerWithID:(nonnull NSNumber *)containerID)
{
id<RCTComponent> container = _shadowViewRegistry[containerID];
RCTAssert(container != nil, @"container view (for ID %@) not found", containerID);
NSUInteger subviewsCount = [container reactSubviews].count;
NSMutableArray<NSNumber *> *indices = [[NSMutableArray alloc] initWithCapacity:subviewsCount];
for (NSUInteger childIndex = 0; childIndex < subviewsCount; childIndex++) {
[indices addObject:@(childIndex)];
}
[self manageChildren:containerID
moveFromIndices:nil
moveToIndices:nil
addChildReactTags:nil
addAtIndices:nil
removeAtIndices:indices];
}
/**
* 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++;
[self->_viewsToBeDeleted removeObject:removedChild];
[container removeReactSubview:removedChild];
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;
}
};
[_viewsToBeDeleted addObject:removedChild];
// Disable user interaction while the view is animating since JS won't receive
// the view events anyway.
removedChild.userInteractionEnabled = NO;
NSString *property = deletingLayoutAnimation.property;
[deletingLayoutAnimation performAnimations:^{
if ([property isEqualToString:@"scaleXY"]) {
removedChild.layer.transform = CATransform3DMakeScale(0.001, 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];
[[NSNotificationCenter defaultCenter] postNotificationName:RCTUIManagerDidRemoveRootViewNotification
object:uiManager
userInfo:@{RCTUIManagerRootViewKey: rootView}];
}];
}
RCT_EXPORT_METHOD(replaceExistingNonRootView:(nonnull NSNumber *)reactTag
withView:(nonnull NSNumber *)newReactTag)
{
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
RCTAssert(shadowView != nil, @"shadowView (for ID %@) not found", reactTag);
RCTShadowView *superShadowView = shadowView.superview;
if (!superShadowView) {
RCTAssert(NO, @"shadowView super (of ID %@) not found", reactTag);
return;
}
NSUInteger indexOfView = [superShadowView.reactSubviews indexOfObject:shadowView];
RCTAssert(indexOfView != NSNotFound, @"View's superview doesn't claim it as subview (id %@)", reactTag);
NSArray<NSNumber *> *removeAtIndices = @[@(indexOfView)];
NSArray<NSNumber *> *addTags = @[newReactTag];
[self manageChildren:superShadowView.reactTag
moveFromIndices:nil
moveToIndices:nil
addChildReactTags:addTags
addAtIndices:removeAtIndices
removeAtIndices:removeAtIndices];
}
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);
}];
}
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];
}];
}
- (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) {
NSInteger insertAtIndex = reactIndex.integerValue;
// When performing a delete animation, views are not removed immediately
// from their container so we need to offset the insertion index if a view
// that will be removed appears earlier than the view we are inserting.
if (isUIViewRegistry && _viewsToBeDeleted.count > 0) {
for (NSInteger index = 0; index < insertAtIndex; index++) {
UIView *subview = ((UIView *)container).reactSubviews[index];
if ([_viewsToBeDeleted containsObject:subview]) {
insertAtIndex++;
}
}
}
[container insertReactSubview:destinationsToChildrenToAdd[reactIndex]
atIndex:insertAtIndex];
}
}
RCT_EXPORT_METHOD(createView:(nonnull NSNumber *)reactTag
viewName:(NSString *)viewName
rootTag:(__unused 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;
}
// Shadow view is the source of truth for background color this is a little
// bit counter-intuitive if people try to set background color when setting up
// the view, but it's the only way that makes sense given our threading model
UIColor *backgroundColor = shadowView.backgroundColor;
// Dispatch view creation directly to the main thread instead of adding to
// UIBlocks array. This way, it doesn't get deferred until after layout.
__weak RCTUIManager *weakManager = self;
dispatch_async(dispatch_get_main_queue(), ^{
RCTUIManager *uiManager = weakManager;
if (!uiManager) {
return;
}
UIView *view = [componentData createViewWithTag:reactTag];
if (view) {
[componentData setProps:props forView:view]; // Must be done before bgColor to prevent wrong default
if ([view respondsToSelector:@selector(setBackgroundColor:)]) {
((UIView *)view).backgroundColor = backgroundColor;
}
if ([view respondsToSelector:@selector(reactBridgeDidFinishTransaction)]) {
[uiManager->_bridgeTransactionListeners addObject:view];
}
uiManager->_viewRegistry[reactTag] = view;
#if RCT_DEV
[view _DEBUG_setReactShadowView:shadowView];
#endif
}
});
}
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];
}];
}
- (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:(NSInteger)commandID
commandArgs:(NSArray<id> *)commandArgs)
{
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
RCTComponentData *componentData = _componentDataByName[shadowView.viewName];
Class managerClass = componentData.managerClass;
RCTModuleData *moduleData = [_bridge moduleDataForName:RCTBridgeModuleNameForClass(managerClass)];
id<RCTBridgeMethod> method = moduleData.methods[commandID];
NSArray *args = [@[reactTag] arrayByAddingObjectsFromArray:commandArgs];
[method invokeWithBridge:_bridge module:componentData.manager arguments:args];
}
- (void)partialBatchDidFlush
{
if (self.unsafeFlushUIChangesBeforeBatchEnds) {
[self flushUIBlocks];
}
}
- (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
{
// Gather blocks to be executed now that all view hierarchy manipulations have
// been completed (note that these may still take place before layout has finished)
for (RCTComponentData *componentData in _componentDataByName.allValues) {
RCTViewManagerUIBlock uiBlock = [componentData uiBlockToAmendWithShadowViewRegistry:_shadowViewRegistry];
[self addUIBlock:uiBlock];
}
[_observerCoordinator uiManagerWillPerformLayout:self];
// Perform layout
for (NSNumber *reactTag in _rootViewTags) {
RCTRootShadowView *rootView = (RCTRootShadowView *)_shadowViewRegistry[reactTag];
[self addUIBlock:[self uiBlockWithLayoutUpdateForRootView:rootView]];
}
[_observerCoordinator uiManagerDidPerformLayout:self];
// Properies propagation
for (NSNumber *reactTag in _rootViewTags) {
RCTRootShadowView *rootView = (RCTRootShadowView *)_shadowViewRegistry[reactTag];
[self _amendPendingUIBlocksWithStylePropagationUpdateForShadowView:rootView];
}
[self addUIBlock:^(RCTUIManager *uiManager, __unused NSDictionary<NSNumber *, UIView *> *viewRegistry) {
/**
* TODO(tadeu): Remove it once and for all
*/
for (id<RCTComponent> node in uiManager->_bridgeTransactionListeners) {
[node reactBridgeDidFinishTransaction];
}
}];
[_observerCoordinator uiManagerWillFlushUIBlocks:self];
[self flushUIBlocks];
}
- (void)flushUIBlocks
{
RCTAssertThread(RCTGetUIManagerQueue(),
@"flushUIBlocks can only be called from the shadow queue");
// 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) {
// Execute the previously queued UI blocks
RCTProfileBeginFlowEvent();
dispatch_async(dispatch_get_main_queue(), ^{
RCTProfileEndFlowEvent();
RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"-[UIManager flushUIBlocks]", (@{
@"count": [@(previousPendingUIBlocks.count) stringValue],
}));
@try {
for (RCTViewManagerUIBlock block in previousPendingUIBlocks) {
block(self, self->_viewRegistry);
}
}
@catch (NSException *exception) {
RCTLogError(@"Exception thrown while executing UI block: %@", exception);
}
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
});
}
}
- (void)setNeedsLayout
{
// If there is an active batch layout will happen when batch finished, so we will wait for that.
// Otherwise we immidiately trigger layout.
if (![_bridge isBatchActive] && ![_bridge isLoading]) {
[self _layoutAndMount];
}
}
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),
]);
}];
}
/**
* Returs 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);
}
/**
* 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(measureLayoutRelativeToParent:(nonnull NSNumber *)reactTag
errorCallback:(__unused RCTResponseSenderBlock)errorCallback
callback:(RCTResponseSenderBlock)callback)
{
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
RCTMeasureLayout(shadowView, shadowView.reactSuperview, callback);
}
/**
* Returns an array of computed offset layouts in a dictionary form. The layouts are of any React subviews
* that are immediate descendants to the parent view found within a specified rect. The dictionary result
* contains left, top, width, height and an index. The index specifies the position among the other subviews.
* Only layouts for views that are within the rect passed in are returned. Invokes the error callback if the
* passed in parent view does not exist. Invokes the supplied callback with the array of computed layouts.
*/
RCT_EXPORT_METHOD(measureViewsInRect:(CGRect)rect
parentView:(nonnull NSNumber *)reactTag
errorCallback:(__unused RCTResponseSenderBlock)errorCallback
callback:(RCTResponseSenderBlock)callback)
{
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
if (!shadowView) {
RCTLogError(@"Attempting to measure view that does not exist (tag #%@)", reactTag);
return;
}
NSArray<RCTShadowView *> *childShadowViews = [shadowView reactSubviews];
NSMutableArray<NSDictionary *> *results =
[[NSMutableArray alloc] initWithCapacity:childShadowViews.count];
[childShadowViews enumerateObjectsUsingBlock:
^(RCTShadowView *childShadowView, NSUInteger idx, __unused BOOL *stop) {
CGRect childLayout = [childShadowView measureLayoutRelativeToAncestor:shadowView];
if (CGRectIsNull(childLayout)) {
RCTLogError(@"View %@ (tag #%@) is not a descendant of %@ (tag #%@)",
childShadowView, childShadowView.reactTag, shadowView, shadowView.reactTag);
return;
}
CGFloat leftOffset = childLayout.origin.x;
CGFloat topOffset = childLayout.origin.y;
CGFloat width = childLayout.size.width;
CGFloat height = childLayout.size.height;
if (leftOffset <= rect.origin.x + rect.size.width &&
leftOffset + width >= rect.origin.x &&
topOffset <= rect.origin.y + rect.size.height &&
topOffset + height >= rect.origin.y) {
// This view is within the layout rect
NSDictionary *result = @{@"index": @(idx),
@"left": @(leftOffset),
@"top": @(topOffset),
@"width": @(width),
@"height": @(height)};
[results addObject:result];
}
}];
callback(@[results]);
}
RCT_EXPORT_METHOD(takeSnapshot:(id /* NSString or NSNumber */)target
withOptions:(NSDictionary *)options
resolve:(RCTPromiseResolveBlock)resolve
reject:(RCTPromiseRejectBlock)reject)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
// Get view
UIView *view;
if (target == nil || [target isEqual:@"window"]) {
view = RCTKeyWindow();
} else if ([target isKindOfClass:[NSNumber class]]) {
view = viewRegistry[target];
if (!view) {
RCTLogError(@"No view found with reactTag: %@", target);
return;
}
}
// Get options
CGSize size = [RCTConvert CGSize:options];
NSString *format = [RCTConvert NSString:options[@"format"] ?: @"png"];
// Capture image
if (size.width < 0.1 || size.height < 0.1) {
size = view.bounds.size;
}
UIGraphicsBeginImageContextWithOptions(size, NO, 0);
BOOL success = [view drawViewHierarchyInRect:(CGRect){CGPointZero, size} afterScreenUpdates:YES];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
if (!success || !image) {
reject(RCTErrorUnspecified, @"Failed to capture view snapshot.", nil);
return;
}
// Convert image to data (on a background thread)
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSData *data;
if ([format isEqualToString:@"png"]) {
data = UIImagePNGRepresentation(image);
} else if ([format isEqualToString:@"jpeg"]) {
CGFloat quality = [RCTConvert CGFloat:options[@"quality"] ?: @1];
data = UIImageJPEGRepresentation(image, quality);
} else {
RCTLogError(@"Unsupported image format: %@", format);
return;
}
// Save to a temp file
NSError *error = nil;
NSString *tempFilePath = RCTTempFilePath(format, &error);
if (tempFilePath) {
if ([data writeToFile:tempFilePath options:(NSDataWritingOptions)0 error:&error]) {
resolve(tempFilePath);
return;
}
}
// If we reached here, something went wrong
reject(RCTErrorUnspecified, error.localizedDescription, error);
});
}];
}
/**
* 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];
if (!_jsResponder) {
RCTLogError(@"Invalid view set to be the JS responder - tag %zd", reactTag);
}
}];
}
RCT_EXPORT_METHOD(clearJSResponder)
{
[self addUIBlock:^(__unused RCTUIManager *uiManager, __unused NSDictionary<NSNumber *, UIView *> *viewRegistry) {
_jsResponder = nil;
}];
}
- (NSDictionary<NSString *, id> *)constantsToExport
{
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) {
NSMutableDictionary<NSString *, id> *moduleConstants = [NSMutableDictionary new];
// Add manager class
moduleConstants[@"Manager"] = RCTBridgeModuleNameForClass(componentData.managerClass);
// Add native props
NSDictionary<NSString *, id> *viewConfig = [componentData viewConfig];
moduleConstants[@"NativeProps"] = viewConfig[@"propTypes"];
// Add direct events
for (NSString *eventName in viewConfig[@"directEvents"]) {
if (!directEvents[eventName]) {
directEvents[eventName] = @{
@"registrationName": [eventName stringByReplacingCharactersInRange:(NSRange){0, 3} withString:@"on"],
};
}
if (RCT_DEBUG && bubblingEvents[eventName]) {
RCTLogError(@"Component '%@' re-registered bubbling event '%@' as a "
"direct event", componentData.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"],
}
};
}
if (RCT_DEBUG && directEvents[eventName]) {
RCTLogError(@"Component '%@' re-registered direct event '%@' as a "
"bubbling event", componentData.name, eventName);
}
}
RCTAssert(!constants[name], @"UIManager already has constants for %@", componentData.name);
constants[name] = moduleConstants;
}];
constants[@"customBubblingEventTypes"] = bubblingEvents;
constants[@"customDirectEventTypes"] = directEvents;
return constants;
}
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;
}
dispatch_async(RCTGetUIManagerQueue(), ^{
NSNumber *rootTag = [self _rootTagForReactTag:reactTag];
dispatch_async(dispatch_get_main_queue(), ^{
UIView *rootView = nil;
if (rootTag != nil) {
rootView = [self viewForReactTag:rootTag];
}
completion(rootView);
});
});
}
- (NSNumber *)_rootTagForReactTag:(NSNumber *)reactTag
{
RCTAssert(!RCTIsMainQueue(), @"Should be called on shadow queue");
if (reactTag == nil) {
return nil;
}
if (RCTIsReactRootView(reactTag)) {
return reactTag;
}
NSNumber *rootTag = nil;
RCTShadowView *shadowView = _shadowViewRegistry[reactTag];
while (shadowView) {
RCTShadowView *parent = [shadowView reactSuperview];
if (!parent && RCTIsReactRootView(shadowView.reactTag)) {
rootTag = shadowView.reactTag;
break;
}
shadowView = parent;
}
return rootTag;
}
static UIView *_jsResponder;
+ (UIView *)JSResponder
{
return _jsResponder;
}
@end
@implementation RCTUIManager (Deprecated)
- (void)registerRootView:(UIView *)rootView withSizeFlexibility:(__unused RCTRootViewSizeFlexibility)sizeFlexibility
{
RCTLogWarn(@"Calling of `[-RCTUIManager registerRootView:withSizeFlexibility:]` which is deprecated.");
[self registerRootView:rootView];
}
- (void)setFrame:(CGRect)frame forView:(UIView *)view
{
RCTLogWarn(@"Calling of `[-RCTUIManager setFrame:forView:]` which is deprecated.");
[self setSize:frame.size forView:view];
}
RCT_EXPORT_METHOD(getContentSizeMultiplier:(nonnull RCTResponseSenderBlock)callback)
{
RCTLogWarn(@"`getContentSizeMultiplier` is deprecated. Instead, use `PixelRatio.getFontScale()` and listen to the `didUpdateDimensions` event.");
callback(@[@(_bridge.accessibilityManager.multiplier)]);
}
@end
@implementation RCTBridge (RCTUIManager)
- (RCTUIManager *)uiManager
{
return [self moduleForClass:[RCTUIManager class]];
}
@end
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