From 06c09a8fb4ffb2c6cb9f66743612bdd6394ec187 Mon Sep 17 00:00:00 2001
From: Hal Eisen <haleisen@appdevforall.org>
Date: Tue, 24 Feb 2026 15:56:25 -0800
Subject: [PATCH] turns off nested scrolling for the chat list. The list still
 scrolls normally, but it no longer dispatches nested scroll events to the
 CoordinatorLayout, so the app bar and the rest of the editor UI stay fixed.

---
 .../agent/fragments/ChatFragment.kt           | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/app/src/main/java/com/itsaky/androidide/agent/fragments/ChatFragment.kt b/app/src/main/java/com/itsaky/androidide/agent/fragments/ChatFragment.kt
index a97b09e444..0f9ffc356a 100644
--- a/app/src/main/java/com/itsaky/androidide/agent/fragments/ChatFragment.kt
+++ b/app/src/main/java/com/itsaky/androidide/agent/fragments/ChatFragment.kt
@@ -8,9 +8,11 @@ import android.util.Log
 import android.view.KeyEvent
 import android.view.MotionEvent
 import android.view.View
+import android.view.ViewGroup
 import android.view.inputmethod.InputMethodManager
 import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.isVisible
 import androidx.core.view.updateLayoutParams
@@ -232,6 +234,31 @@ class ChatFragment : EmptyStateFragment<FragmentChatBinding>(FragmentChatBinding
 			LinearLayoutManager(requireContext()).apply {
 				stackFromEnd = true
 			}
+		// Prevent nested scroll from propagating to CoordinatorLayout so the app bar (project
+		// name, actions toolbar) does not scroll when the user scrolls the agent chat list.
+		ViewCompat.setNestedScrollingEnabled(binding.chatRecyclerView, false)
+		// Let the list scroll instead of the bottom sheet when the user drags over the chat.
+		binding.chatRecyclerView.addOnItemTouchListener(
+			object : RecyclerView.OnItemTouchListener {
+				override fun onInterceptTouchEvent(
+					rv: RecyclerView,
+					e: MotionEvent,
+				): Boolean {
+					if (e.actionMasked == MotionEvent.ACTION_DOWN) {
+						var p = rv.parent
+						while (p is ViewGroup) {
+							p.requestDisallowInterceptTouchEvent(true)
+							p = p.parent
+						}
+					}
+					return false
+				}
+
+				override fun onTouchEvent(rv: RecyclerView, e: MotionEvent) {}
+
+				override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) {}
+			},
+		)
 	}
 
 	private fun setupListeners() {