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Fix scroll bug(#568) (#570)

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* fix bug(568): Improve scroll-to-bottom logic

Replaced the "smart scroll" mechanism with a simpler "follow" behavior. The message list now automatically scrolls to the latest message unless the user has scrolled up.

- A new `followIncomingMessages` state tracks whether to auto-scroll.
- Scrolling now uses `scrollToItem` instead of `animateScrollToItem` for immediate updates.

---------

Co-authored-by: GitHub Action <action@github.com>
This commit is contained in:
yet300
2026-01-12 14:43:28 +07:00
committed by GitHub
co-authored by GitHub Action
parent fbcc289e92
commit cbe7a2fc95
1 changed files with 7 additions and 10 deletions
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app/src/main/java/com/bitchat/android/ui/MessageComponents.kt
+7 -10
View File
@@ -71,19 +71,14 @@ fun MessagesList(
// Track if this is the first time messages are being loaded
var hasScrolledToInitialPosition by remember { mutableStateOf(false) }
var followIncomingMessages by remember { mutableStateOf(true) }
// Smart scroll: auto-scroll to bottom for initial load, then only when user is at or near the bottom
// Smart scroll: auto-scroll to bottom for initial load, then follow unless user scrolls away
LaunchedEffect(messages.size) {
if (messages.isNotEmpty()) {
val layoutInfo = listState.layoutInfo
val firstVisibleIndex = layoutInfo.visibleItemsInfo.firstOrNull()?.index ?: -1
// With reverseLayout=true and reversed data, index 0 is the latest message at the bottom
val isFirstLoad = !hasScrolledToInitialPosition
val isNearLatest = firstVisibleIndex <= 2
if (isFirstLoad || isNearLatest) {
listState.animateScrollToItem(0)
if (isFirstLoad || followIncomingMessages) {
listState.scrollToItem(0)
if (isFirstLoad) {
hasScrolledToInitialPosition = true
}
@@ -99,6 +94,7 @@ fun MessagesList(
}
}
LaunchedEffect(isAtLatest) {
followIncomingMessages = isAtLatest
onScrolledUpChanged?.invoke(!isAtLatest)
}
@@ -106,7 +102,8 @@ fun MessagesList(
LaunchedEffect(forceScrollToBottom) {
if (messages.isNotEmpty()) {
// With reverseLayout=true and reversed data, latest is at index 0
listState.animateScrollToItem(0)
followIncomingMessages = true
listState.scrollToItem(0)
}
}