127 lines
3.3 KiB
Objective-C
127 lines
3.3 KiB
Objective-C
/**
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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 "RCTEventDispatcher.h"
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#import "RCTAssert.h"
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#import "RCTBridge.h"
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@implementation RCTEventDispatcher
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{
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RCTBridge __weak *_bridge;
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}
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- (instancetype)initWithBridge:(RCTBridge *)bridge
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{
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if ((self = [super init])) {
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_bridge = bridge;
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}
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return self;
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}
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+ (NSArray *)JSMethods
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{
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return @[
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@"RCTNativeAppEventEmitter.emit",
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@"RCTDeviceEventEmitter.emit",
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@"RCTEventEmitter.receiveEvent",
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];
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}
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- (void)sendAppEventWithName:(NSString *)name body:(id)body
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{
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[_bridge enqueueJSCall:@"RCTNativeAppEventEmitter.emit"
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args:body ? @[name, body] : @[name]];
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}
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- (void)sendDeviceEventWithName:(NSString *)name body:(id)body
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{
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[_bridge enqueueJSCall:@"RCTDeviceEventEmitter.emit"
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args:body ? @[name, body] : @[name]];
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}
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- (void)sendInputEventWithName:(NSString *)name body:(NSDictionary *)body
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{
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RCTAssert([body[@"target"] isKindOfClass:[NSNumber class]],
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@"Event body dictionary must include a 'target' property containing a react tag");
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[_bridge enqueueJSCall:@"RCTEventEmitter.receiveEvent"
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args:body ? @[body[@"target"], name, body] : @[body[@"target"], name]];
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}
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- (void)sendTextEventWithType:(RCTTextEventType)type
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reactTag:(NSNumber *)reactTag
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text:(NSString *)text
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{
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static NSString *events[] = {
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@"topFocus",
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@"topBlur",
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@"topChange",
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@"topSubmitEditing",
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@"topEndEditing",
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};
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[self sendInputEventWithName:events[type] body:text ? @{
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@"text": text,
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@"target": reactTag
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} : @{
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@"target": reactTag
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}];
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}
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/**
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* TODO: throttling
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* NOTE: the old system used a per-scrollview throttling
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* which would be fairly easy to re-implement if needed,
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* but this is non-optimal as it leads to degradation in
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* scroll responsiveness. A better solution would be to
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* coalesce multiple scroll events into a single batch.
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*/
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- (void)sendScrollEventWithType:(RCTScrollEventType)type
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reactTag:(NSNumber *)reactTag
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scrollView:(UIScrollView *)scrollView
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userData:(NSDictionary *)userData
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{
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static NSString *events[] = {
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@"topScrollBeginDrag",
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@"topScroll",
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@"topScrollEndDrag",
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@"topMomentumScrollBegin",
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@"topMomentumScrollEnd",
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@"topScrollAnimationEnd",
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};
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NSDictionary *body = @{
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@"contentOffset": @{
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@"x": @(scrollView.contentOffset.x),
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@"y": @(scrollView.contentOffset.y)
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},
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@"contentSize": @{
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@"width": @(scrollView.contentSize.width),
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@"height": @(scrollView.contentSize.height)
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},
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@"layoutMeasurement": @{
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@"width": @(scrollView.frame.size.width),
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@"height": @(scrollView.frame.size.height)
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},
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@"zoomScale": @(scrollView.zoomScale ?: 1),
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@"target": reactTag
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};
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if (userData) {
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NSMutableDictionary *mutableBody = [body mutableCopy];
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[mutableBody addEntriesFromDictionary:userData];
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body = mutableBody;
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}
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[self sendInputEventWithName:events[type] body:body];
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}
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@end
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