react-native/React/Base/RCTReloadCommand.m
Sophie Alpert 1490ab12ef Update license headers for MIT license
Summary:
Includes React Native and its dependencies Fresco, Metro, and Yoga. Excludes samples/examples/docs.

find: ^(?:( *)|( *(?:[\*~#]|::))( )? *)?Copyright (?:\(c\) )?(\d{4})\b.+Facebook[\s\S]+?BSD[\s\S]+?(?:this source tree|the same directory)\.$
replace: $1$2$3Copyright (c) $4-present, Facebook, Inc.\n$2\n$1$2$3This source code is licensed under the MIT license found in the\n$1$2$3LICENSE file in the root directory of this source tree.

Reviewed By: TheSavior, yungsters

Differential Revision: D7007050

fbshipit-source-id: 37dd6bf0ffec0923bfc99c260bb330683f35553e
2018-02-16 18:31:53 -08:00

42 lines
1.3 KiB
Objective-C

/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import "RCTReloadCommand.h"
#import "RCTAssert.h"
#import "RCTKeyCommands.h"
/** main queue only */
static NSHashTable<id<RCTReloadListener>> *listeners;
void RCTRegisterReloadCommandListener(id<RCTReloadListener> listener)
{
RCTAssertMainQueue(); // because registerKeyCommandWithInput: must be called on the main thread
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
listeners = [NSHashTable weakObjectsHashTable];
[[RCTKeyCommands sharedInstance] registerKeyCommandWithInput:@"r"
modifierFlags:UIKeyModifierCommand
action:
^(__unused UIKeyCommand *command) {
RCTTriggerReloadCommandListeners();
}];
});
[listeners addObject:listener];
}
void RCTTriggerReloadCommandListeners(void)
{
RCTAssertMainQueue();
// Copy to protect against mutation-during-enumeration.
// If listeners hasn't been initialized yet we get nil, which works just fine.
NSArray<id<RCTReloadListener>> *copiedListeners = [listeners allObjects];
for (id<RCTReloadListener> l in copiedListeners) {
[l didReceiveReloadCommand];
}
}