RCTEventDispatcher.h
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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 <UIKit/UIKit.h>
#import <React/RCTBridge.h>
typedef NS_ENUM(NSInteger, RCTTextEventType)
{
RCTTextEventTypeFocus,
RCTTextEventTypeBlur,
RCTTextEventTypeChange,
RCTTextEventTypeSubmit,
RCTTextEventTypeEnd,
RCTTextEventTypeKeyPress
};
/**
* The threshold at which text inputs will start warning that the JS thread
* has fallen behind (resulting in poor input performance, missed keys, etc.)
*/
RCT_EXTERN const NSInteger RCTTextUpdateLagWarningThreshold;
/**
* Takes an input event name and normalizes it to the form that is required
* by the events system (currently that means starting with the "top" prefix,
* but that's an implementation detail that may change in future).
*/
RCT_EXTERN NSString *RCTNormalizeInputEventName(NSString *eventName);
@protocol RCTEvent <NSObject>
@required
@property (nonatomic, strong, readonly) NSNumber *viewTag;
@property (nonatomic, copy, readonly) NSString *eventName;
@property (nonatomic, assign, readonly) uint16_t coalescingKey;
- (BOOL)canCoalesce;
- (id<RCTEvent>)coalesceWithEvent:(id<RCTEvent>)newEvent;
// used directly for doing a JS call
+ (NSString *)moduleDotMethod;
// must contain only JSON compatible values
- (NSArray *)arguments;
@end
/**
* This protocol allows observing events dispatched by RCTEventDispatcher.
*/
@protocol RCTEventDispatcherObserver <NSObject>
/**
* Called before dispatching an event, on the same thread the event was
* dispatched from.
*/
- (void)eventDispatcherWillDispatchEvent:(id<RCTEvent>)event;
@end
/**
* This class wraps the -[RCTBridge enqueueJSCall:args:] method, and
* provides some convenience methods for generating event calls.
*/
@interface RCTEventDispatcher : NSObject <RCTBridgeModule>
/**
* Deprecated, do not use.
*/
- (void)sendAppEventWithName:(NSString *)name body:(id)body
__deprecated_msg("Subclass RCTEventEmitter instead");
/**
* Deprecated, do not use.
*/
- (void)sendDeviceEventWithName:(NSString *)name body:(id)body
__deprecated_msg("Subclass RCTEventEmitter instead");
/**
* Deprecated, do not use.
*/
- (void)sendInputEventWithName:(NSString *)name body:(NSDictionary *)body
__deprecated_msg("Use RCTDirectEventBlock or RCTBubblingEventBlock instead");
/**
* Send a text input/focus event. For internal use only.
*/
- (void)sendTextEventWithType:(RCTTextEventType)type
reactTag:(NSNumber *)reactTag
text:(NSString *)text
key:(NSString *)key
eventCount:(NSInteger)eventCount;
/**
* Send a pre-prepared event object.
*
* Events are sent to JS as soon as the thread is free to process them.
* If an event can be coalesced and there is another compatible event waiting, the coalescing will happen immediately.
*/
- (void)sendEvent:(id<RCTEvent>)event;
/**
* Add an event dispatcher observer.
*/
- (void)addDispatchObserver:(id<RCTEventDispatcherObserver>)observer;
/**
* Remove an event dispatcher observer.
*/
- (void)removeDispatchObserver:(id<RCTEventDispatcherObserver>)observer;
@end
@interface RCTBridge (RCTEventDispatcher)
- (RCTEventDispatcher *)eventDispatcher;
@end