/*
 * The issue this whole time was the UITextView would not wait for the pan gesture of it's hosting UIScrollView to fail.
 * Once we find out the correct gestures to hook into, we can ensure they don't get recognized simultaneously.
 */

@interface TextViewSubclass : UITextView <UIGestureRecognizerDelegate> {
    BOOL _hasHookedGesturesForiOS13LinkTapBug;
}

- (void)_hookGestures;

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer;

@end

@implementation TextViewSubclass

- (void)_hookGestures {
    /*
     * as this can get called multiple times, we use a simple flag to keep it in check.
     */
    if (_hasHookedGesturesForiOS13LinkTapBug) {
        return;
    }

    _hasHookedGesturesForiOS13LinkTapBug = YES;

    Class longPress = UILongPressGestureRecognizer.class;
    Class linkTap = UITapGestureRecognizer.class;

    for (UIGestureRecognizer *gesture in self.gestureRecognizers) {

        if ([gesture isKindOfClass:longPress] || [gesture isKindOfClass:linkTap]) {
            gesture.delegate = self;
        }

    }

}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {

    Class longPress = UILongPressGestureRecognizer.class;
    Class linkTap = UITapGestureRecognizer.class;
    Class scrollViewPan = NSClassFromString(@"UIScrollViewPanGestureRecognizer");

    if ([gestureRecognizer isKindOfClass:longPress] || [gestureRecognizer isKindOfClass:linkTap]) {
#ifdef DEBUG
        NSLog(@"Other gesture: %@", otherGestureRecognizer);
#endif
        if ([otherGestureRecognizer isKindOfClass:scrollViewPan]) {
            return NO;
        }

        return YES;
    }

    return YES;

}

#pragma mark - Usage

- (void)setAttributedText:(NSAttributedString *)attributedText {
    [super setAttributedText:attributedText];

    // we only need to call this on iOS 13.
    if (@avilable(iOS 13, *)) {
        [self _hookGestures];
    }

}

@end