From 382f7cba8dec9b24220e70148f3b53a7a284e7fe Mon Sep 17 00:00:00 2001
From: Graham Mendick <graham.mendick@gmail.com>
Date: Tue, 25 Jun 2024 15:42:39 +0100
Subject: [PATCH] Prevented coordinator intercepting sheet scrolls

Couldn't scroll in a bottomsheet or sheet because the coordinator was intercepting it. This interception is a workaround for [a (react native or android?) bug](https://github.com/facebook/react-native/pull/44099) where the nested scroll stops working of scroll content shorter than height.
Checked if the event target is a sheet and don't intercept in that case.
---
 .../reactnative/CoordinatorLayoutView.java    | 22 ++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/NavigationReactNative/src/android/src/main/java/com/navigation/reactnative/CoordinatorLayoutView.java b/NavigationReactNative/src/android/src/main/java/com/navigation/reactnative/CoordinatorLayoutView.java
index d4139583b4..1735dd855d 100644
--- a/NavigationReactNative/src/android/src/main/java/com/navigation/reactnative/CoordinatorLayoutView.java
+++ b/NavigationReactNative/src/android/src/main/java/com/navigation/reactnative/CoordinatorLayoutView.java
@@ -97,7 +97,7 @@ ScrollView getScrollView() {
     public boolean onInterceptTouchEvent(MotionEvent ev) {
         ScrollView scrollView = getScrollView();
         boolean cannotScroll = scrollView != null && scrollView.getScrollY() == 0 && !scrollView.canScrollVertically(1);
-        if (cannotScroll) {
+        if (cannotScroll && hitTest(scrollView, this, ev)) {
             int action = ev.getAction();
             switch (action & MotionEvent.ACTION_MASK) {
                 case MotionEvent.ACTION_DOWN: {
@@ -147,6 +147,26 @@ public boolean onTouchEvent(MotionEvent ev) {
         return super.onTouchEvent(ev) || dragging;
     }
 
+    private boolean hitTest(ScrollView scrollView, ViewGroup parent, MotionEvent ev) {
+        for(int i = parent.getChildCount() - 1; i >= 0; i--) {
+            View view = parent.getChildAt(i);
+            int[] childLocation = new int[2];
+            view.getLocationOnScreen(childLocation);
+            float x = ev.getRawX();
+            float y = ev.getRawY();
+            int childLeft = childLocation[0];
+            int childTop = childLocation[1];
+            int childRight = childLeft + view.getWidth();
+            int childBottom = childTop + view.getHeight();
+            if (x >= childLeft && x < childRight && y >= childTop && y < childBottom) {
+                if (view instanceof BottomSheetView || view instanceof SheetView) return false;
+                if (view == scrollView) return true;
+                if (view instanceof ViewGroup viewGroup) return hitTest(scrollView, viewGroup, ev);
+            }
+        }
+        return false;
+    }
+
     @Override
     public void addView(View child, int index, ViewGroup.LayoutParams params) {
         drawingOrderHelper.handleAddView(child);