react-native/React/Modules/RCTUIManagerObserverCoordin...

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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 "RCTUIManagerObserverCoordinator.h"
#import <mutex>
#import "RCTUIManager.h"
@implementation RCTUIManagerObserverCoordinator {
NSHashTable<id<RCTUIManagerObserver>> *_observers;
std::mutex _mutex;
}
- (instancetype)init
{
if (self = [super init]) {
_observers = [[NSHashTable alloc] initWithOptions:NSHashTableWeakMemory capacity:0];
}
return self;
}
- (void)addObserver:(id<RCTUIManagerObserver>)observer
{
std::lock_guard<std::mutex> lock(_mutex);
[self->_observers addObject:observer];
}
- (void)removeObserver:(id<RCTUIManagerObserver>)observer
{
std::lock_guard<std::mutex> lock(_mutex);
[self->_observers removeObject:observer];
}
#pragma mark - RCTUIManagerObserver
- (void)uiManagerWillPerformLayout:(RCTUIManager *)manager
{
std::lock_guard<std::mutex> lock(_mutex);
for (id<RCTUIManagerObserver> observer in _observers) {
if ([observer respondsToSelector:@selector(uiManagerWillPerformLayout:)]) {
[observer uiManagerWillPerformLayout:manager];
}
}
}
- (void)uiManagerDidPerformLayout:(RCTUIManager *)manager
{
std::lock_guard<std::mutex> lock(_mutex);
for (id<RCTUIManagerObserver> observer in _observers) {
if ([observer respondsToSelector:@selector(uiManagerDidPerformLayout:)]) {
[observer uiManagerDidPerformLayout:manager];
}
}
}
- (void)uiManagerWillPerformMounting:(RCTUIManager *)manager
{
std::lock_guard<std::mutex> lock(_mutex);
for (id<RCTUIManagerObserver> observer in _observers) {
if ([observer respondsToSelector:@selector(uiManagerWillPerformMounting:)]) {
[observer uiManagerWillPerformMounting:manager];
}
}
}
- (void)uiManagerDidPerformMounting:(RCTUIManager *)manager
{
std::lock_guard<std::mutex> lock(_mutex);
for (id<RCTUIManagerObserver> observer in _observers) {
if ([observer respondsToSelector:@selector(uiManagerDidPerformMounting:)]) {
[observer uiManagerDidPerformMounting:manager];
}
}
}
@end