From dc6bab7ae661528d27341973ee0d26d58c97e465 Mon Sep 17 00:00:00 2001
From: Stanislav Dmitrenko <7953703+avently@users.noreply.github.com>
Date: Thu, 9 Feb 2023 02:10:56 +0300
Subject: [PATCH] android: fixed broken autoscroll when a new message is coming
 (#1917)

* android: fixed broken autoscroll when a new message is coming

* spelling
---
 .../java/chat/simplex/app/views/chat/ChatView.kt | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/apps/android/app/src/main/java/chat/simplex/app/views/chat/ChatView.kt b/apps/android/app/src/main/java/chat/simplex/app/views/chat/ChatView.kt
index b155f33f26..c9cb6d6f4f 100644
--- a/apps/android/app/src/main/java/chat/simplex/app/views/chat/ChatView.kt
+++ b/apps/android/app/src/main/java/chat/simplex/app/views/chat/ChatView.kt
@@ -674,10 +674,18 @@ private fun ScrollToBottom(chatId: ChatId, listState: LazyListState, chatItems:
       .distinctUntilChanged()
       .filter { listState.layoutInfo.visibleItemsInfo.firstOrNull()?.key != it }
       .collect {
-        if (listState.firstVisibleItemIndex == 0) {
-          listState.animateScrollToItem(0)
-        } else {
-          listState.animateScrollBy(scrollDistance)
+        try {
+          if (listState.firstVisibleItemIndex == 0) {
+            listState.animateScrollToItem(0)
+          } else {
+            listState.animateScrollBy(scrollDistance)
+          }
+        } catch (e: CancellationException) {
+          /**
+           * When you tap and hold a finger on a lazy column with chatItems, and then you receive a message,
+           * this coroutine will be canceled with the message "Current mutation had a higher priority" because of animatedScroll.
+           * Which breaks auto-scrolling to bottom. So just ignoring the exception
+           * */
         }
       }
   }