Tap blocking in GenericViewBlock

commit_hash:ce1bc24cde851c2411491ac3972672ca8916989e

client/ios/LayoutKit/LayoutKit/GenericViewBlock.swift

@@ -37,6 +37,7 @@ public final class GenericViewBlock: BlockWithTraits {
   public let content: Lazy<Content>
   public let width: Trait
   public let height: Trait
+  public let isExclusiveTouch: Bool
 
   public var widthTrait: LayoutTrait { width.layoutTrait }
   public var heightTrait: LayoutTrait { height.layoutTrait }
@@ -56,41 +57,57 @@ public final class GenericViewBlock: BlockWithTraits {
   public init(
     lazyContent: Lazy<Content>,
     width: Trait,
-    height: Trait
+    height: Trait,
+    isExclusiveTouch: Bool = false
   ) {
     self.content = lazyContent
     self.width = width
     self.height = height
+    self.isExclusiveTouch = isExclusiveTouch
   }
 
   public convenience init(
     content: Content,
     width: Trait,
-    height: Trait
+    height: Trait,
+    isExclusiveTouch: Bool = false
   ) {
     self.init(
       lazyContent: Lazy<Content>(
         onMainThreadGetter: { content }
       ),
       width: width,
-      height: height
+      height: height,
+      isExclusiveTouch: isExclusiveTouch
     )
   }
 
   public convenience init(
     view: ViewType,
     width: CGFloat? = nil,
-    height: CGFloat? = nil
+    height: CGFloat? = nil,
+    isExclusiveTouch: Bool = false
   ) {
-    self.init(content: .view(view), width: width.trait, height: height.trait)
+    self.init(
+      content: .view(view),
+      width: width.trait,
+      height: height.trait,
+      isExclusiveTouch: isExclusiveTouch
+    )
   }
 
   public convenience init(
     layer: LayerType,
     width: CGFloat? = nil,
-    height: CGFloat? = nil
+    height: CGFloat? = nil,
+    isExclusiveTouch: Bool = false
   ) {
-    self.init(content: .layer(layer), width: width.trait, height: height.trait)
+    self.init(
+      content: .layer(layer),
+      width: width.trait,
+      height: height.trait,
+      isExclusiveTouch: isExclusiveTouch
+    )
   }
 
   public func intrinsicContentHeight(forWidth width: CGFloat) -> CGFloat {
@@ -106,8 +123,10 @@ public final class GenericViewBlock: BlockWithTraits {
       return false
     }
 
-    return content.currentValue === other.content.currentValue && width == other
-      .width && height == other.height
+    return content.currentValue === other.content.currentValue
+      && width == other.width
+      && height == other.height
+      && isExclusiveTouch == other.isExclusiveTouch
   }
 
   public func getImageHolders() -> [ImageHolder] { [] }

client/ios/LayoutKit/LayoutKit/UI/Blocks/GenericViewBlock+UIViewRenderableBlock.swift

@@ -17,7 +17,9 @@ extension GenericViewBlock {
     overscrollDelegate _: ScrollDelegate?,
     renderingDelegate _: RenderingDelegate?
   ) {
-    (view as! GenericView).content = content.value
+    let genericView = view as! GenericView
+    genericView.content = content.value
+    genericView.exclusiveTouchEnabled = isExclusiveTouch
   }
 }
 
@@ -34,8 +36,31 @@ private final class GenericView: UIView, BlockViewProtocol, VisibleBoundsTrackin
     }
   }
 
+  var exclusiveTouchEnabled = false {
+    didSet {
+      guard oldValue != exclusiveTouchEnabled else { return }
+      tapAbsorber.isEnabled = exclusiveTouchEnabled
+    }
+  }
+
+  private let tapAbsorber = UITapGestureRecognizer()
+
   var effectiveBackgroundColor: UIColor? { backgroundColor }
 
+  override init(frame: CGRect) {
+    super.init(frame: frame)
+    tapAbsorber.addTarget(self, action: #selector(absorbTap))
+    tapAbsorber.delegate = self
+    tapAbsorber.cancelsTouchesInView = false
+    tapAbsorber.isEnabled = false
+    addGestureRecognizer(tapAbsorber)
+  }
+
+  @available(*, unavailable)
+  required init?(coder _: NSCoder) {
+    fatalError("init(coder:) has not been implemented")
+  }
+
   override func layoutSubviews() {
     super.layoutSubviews()
     content?.setFrame(bounds)
@@ -49,6 +74,25 @@ private final class GenericView: UIView, BlockViewProtocol, VisibleBoundsTrackin
       return result
     }
   }
+
+  @objc private func absorbTap() {}
+}
+
+extension GenericView: UIGestureRecognizerDelegate {
+  func gestureRecognizer(
+    _ gestureRecognizer: UIGestureRecognizer,
+    shouldBeRequiredToFailBy otherGestureRecognizer: UIGestureRecognizer
+  ) -> Bool {
+    guard gestureRecognizer === tapAbsorber else { return false }
+    guard let otherTap = otherGestureRecognizer as? UITapGestureRecognizer,
+          otherTap.numberOfTapsRequired == 1
+    else { return false }
+    guard let otherView = otherTap.view,
+          otherView !== self,
+          isDescendant(of: otherView)
+    else { return false }
+    return true
+  }
 }
 
 extension GenericViewBlock.Content {