150 lines
5.3 KiB
Objective-C
150 lines
5.3 KiB
Objective-C
//
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// RNNativeViewHandler.m
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// RNGestureHandler
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//
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// Created by Krzysztof Magiera on 12/10/2017.
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// Copyright © 2017 Software Mansion. All rights reserved.
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//
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#import "RNNativeViewHandler.h"
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#import <UIKit/UIGestureRecognizerSubclass.h>
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#import <React/RCTConvert.h>
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#import <React/RCTScrollView.h>
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#import <React/UIView+React.h>
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#pragma mark RNDummyGestureRecognizer
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@implementation RNDummyGestureRecognizer
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- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
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{
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self.state = UIGestureRecognizerStateFailed;
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[self reset];
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}
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- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
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{
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self.state = UIGestureRecognizerStateCancelled;
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[self reset];
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}
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@end
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#pragma mark RNNativeViewgestureHandler
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@implementation RNNativeViewGestureHandler {
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BOOL _shouldActivateOnStart;
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BOOL _disallowInterruption;
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}
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- (instancetype)initWithTag:(NSNumber *)tag
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{
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if ((self = [super initWithTag:tag])) {
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_recognizer = [[RNDummyGestureRecognizer alloc] init];
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}
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return self;
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}
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- (void)configure:(NSDictionary *)config
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{
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[super configure:config];
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_shouldActivateOnStart = [RCTConvert BOOL:config[@"shouldActivateOnStart"]];
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_disallowInterruption = [RCTConvert BOOL:config[@"disallowInterruption"]];
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}
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- (void)bindToView:(UIView *)view
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{
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// For UIControl based views (UIButton, UISwitch) we provide special handling that would allow
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// for properties like `disallowInterruption` to work.
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if ([view isKindOfClass:[UIControl class]]) {
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UIControl *control = (UIControl *)view;
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[control addTarget:self action:@selector(handleTouchDown:forEvent:) forControlEvents:UIControlEventTouchDown];
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[control addTarget:self action:@selector(handleTouchUpOutside:forEvent:) forControlEvents:UIControlEventTouchUpOutside];
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[control addTarget:self action:@selector(handleTouchUpInside:forEvent:) forControlEvents:UIControlEventTouchUpInside];
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[control addTarget:self action:@selector(handleDragExit:forEvent:) forControlEvents:UIControlEventTouchDragExit];
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[control addTarget:self action:@selector(handleDragEnter:forEvent:) forControlEvents:UIControlEventTouchDragEnter];
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[control addTarget:self action:@selector(handleTouchCancel:forEvent:) forControlEvents:UIControlEventTouchCancel];
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} else {
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[super bindToView:view];
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}
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// We can restore default scrollview behaviour to delay touches to scrollview's children
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// because gesture handler system can handle cancellation of scroll recognizer when JS responder
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// is set
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if ([view isKindOfClass:[RCTScrollView class]]) {
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// This part of the code is coupled with RN implementation of ScrollView native wrapper and
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// we expect for RCTScrollView component to contain a subclass of UIScrollview as the only
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// subview
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UIScrollView *scrollView = [view.subviews objectAtIndex:0];
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scrollView.delaysContentTouches = YES;
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}
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}
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- (void)handleTouchDown:(UIView *)sender forEvent:(UIEvent *)event
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{
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[self reset];
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if (_disallowInterruption) {
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// When `disallowInterruption` is set we cancel all gesture handlers when this UIControl
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// gets DOWN event
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for (UITouch *touch in [event allTouches]) {
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for (UIGestureRecognizer *recogn in [touch gestureRecognizers]) {
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recogn.enabled = NO;
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recogn.enabled = YES;
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}
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}
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}
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[self sendEventsInState:RNGestureHandlerStateActive
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forViewWithTag:sender.reactTag
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withExtraData:[RNGestureHandlerEventExtraData forPointerInside:YES]];
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}
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- (void)handleTouchUpOutside:(UIView *)sender forEvent:(UIEvent *)event
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{
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[self sendEventsInState:RNGestureHandlerStateEnd
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forViewWithTag:sender.reactTag
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withExtraData:[RNGestureHandlerEventExtraData forPointerInside:NO]];
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}
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- (void)handleTouchUpInside:(UIView *)sender forEvent:(UIEvent *)event
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{
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[self sendEventsInState:RNGestureHandlerStateEnd
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forViewWithTag:sender.reactTag
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withExtraData:[RNGestureHandlerEventExtraData forPointerInside:YES]];
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}
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- (void)handleDragExit:(UIView *)sender forEvent:(UIEvent *)event
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{
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// Pointer is moved outside of the view bounds, we cancel button when `shouldCancelWhenOutside` is set
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if (self.shouldCancelWhenOutside) {
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UIControl *control = (UIControl *)sender;
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[control cancelTrackingWithEvent:event];
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[self sendEventsInState:RNGestureHandlerStateEnd
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forViewWithTag:sender.reactTag
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withExtraData:[RNGestureHandlerEventExtraData forPointerInside:NO]];
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} else {
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[self sendEventsInState:RNGestureHandlerStateActive
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forViewWithTag:sender.reactTag
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withExtraData:[RNGestureHandlerEventExtraData forPointerInside:NO]];
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}
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}
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- (void)handleDragEnter:(UIView *)sender forEvent:(UIEvent *)event
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{
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[self sendEventsInState:RNGestureHandlerStateActive
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forViewWithTag:sender.reactTag
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withExtraData:[RNGestureHandlerEventExtraData forPointerInside:YES]];
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}
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- (void)handleTouchCancel:(UIView *)sender forEvent:(UIEvent *)event
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{
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[self sendEventsInState:RNGestureHandlerStateCancelled
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forViewWithTag:sender.reactTag
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withExtraData:[RNGestureHandlerEventExtraData forPointerInside:NO]];
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}
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@end
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