94 lines
3.0 KiB
Mathematica
94 lines
3.0 KiB
Mathematica
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTTouchEvent.h"
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#import "RCTAssert.h"
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@implementation RCTTouchEvent
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{
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NSArray<NSDictionary *> *_reactTouches;
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NSArray<NSNumber *> *_changedIndexes;
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uint16_t _coalescingKey;
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}
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@synthesize eventName = _eventName;
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@synthesize viewTag = _viewTag;
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- (instancetype)initWithEventName:(NSString *)eventName
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reactTag:(NSNumber *)reactTag
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reactTouches:(NSArray<NSDictionary *> *)reactTouches
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changedIndexes:(NSArray<NSNumber *> *)changedIndexes
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coalescingKey:(uint16_t)coalescingKey
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{
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if (self = [super init]) {
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_viewTag = reactTag;
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_eventName = eventName;
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_reactTouches = reactTouches;
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_changedIndexes = changedIndexes;
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_coalescingKey = coalescingKey;
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}
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return self;
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}
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RCT_NOT_IMPLEMENTED(- (instancetype)init)
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#pragma mark - RCTEvent
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- (BOOL)canCoalesce
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{
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return [_eventName isEqual:@"touchMove"];
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}
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// We coalesce only move events, while holding some assumptions that seem reasonable but there are no explicit guarantees about them.
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- (id<RCTEvent>)coalesceWithEvent:(id<RCTEvent>)newEvent
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{
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RCTAssert([newEvent isKindOfClass:[RCTTouchEvent class]], @"Touch event cannot be coalesced with any other type of event, such as provided %@", newEvent);
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RCTTouchEvent *newTouchEvent = (RCTTouchEvent *)newEvent;
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RCTAssert([_reactTouches count] == [newTouchEvent->_reactTouches count], @"Touch events have different number of touches. %@ %@", self, newEvent);
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BOOL newEventIsMoreRecent = NO;
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BOOL oldEventIsMoreRecent = NO;
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NSInteger count = _reactTouches.count;
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for (int i = 0; i<count; i++) {
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NSDictionary *touch = _reactTouches[i];
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NSDictionary *newTouch = newTouchEvent->_reactTouches[i];
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RCTAssert([touch[@"identifier"] isEqual:newTouch[@"identifier"]], @"Touch events doesn't have touches in the same order. %@ %@", touch, newTouch);
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if ([touch[@"timestamp"] doubleValue] > [newTouch[@"timestamp"] doubleValue]) {
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oldEventIsMoreRecent = YES;
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} else {
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newEventIsMoreRecent = YES;
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}
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}
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RCTAssert(!(oldEventIsMoreRecent && newEventIsMoreRecent), @"Neither touch event is exclusively more recent than the other one. %@ %@", _reactTouches, newTouchEvent->_reactTouches);
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return newEventIsMoreRecent ? newEvent : self;
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}
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+ (NSString *)moduleDotMethod
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{
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return @"RCTEventEmitter.receiveTouches";
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}
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- (NSArray *)arguments
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{
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return @[RCTNormalizeInputEventName(_eventName), _reactTouches, _changedIndexes];
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}
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- (uint16_t)coalescingKey
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{
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return _coalescingKey;
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}
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- (NSString *)description
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{
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return [NSString stringWithFormat:@"<%@: %p; name = %@; coalescing key = %hu>", [self class], self, _eventName, _coalescingKey];
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}
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@end
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