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Timeline: add a prefetch backward item

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ganfra 2020-09-24 11:26:08 +02:00 committed by Benoit Marty
parent 435724ffa9
commit 3f5b1083f3
1 changed files with 15 additions and 0 deletions
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15
vector/src/main/java/im/vector/app/features/home/room/detail/timeline/TimelineEventController.kt
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@ -116,6 +116,7 @@ class TimelineEventController @Inject constructor(private val dateFormatter: Vec
private var unreadState: UnreadState = UnreadState.Unknown
private var positionOfReadMarker: Int? = null
private var eventIdToHighlight: String? = null
private var previousModelsSize = 0
var callback: Callback? = null
var timeline: Timeline? = null
@ -191,6 +192,20 @@ class TimelineEventController @Inject constructor(private val dateFormatter: Vec
models.add(position, readMarker)
}
}
val shouldAdd = timeline?.hasMoreToLoad(Timeline.Direction.BACKWARDS) ?: false
if (shouldAdd) {
val indexOfPrefetchBackward = (previousModelsSize - 1)
.coerceAtLeast(0)
.coerceAtMost(models.size - 1)
val loadingItem = LoadingItem_()
.id("prefetch_backward_loading${System.currentTimeMillis()}")
.showLoader(false)
.setVisibilityStateChangedListener(Timeline.Direction.BACKWARDS)
models.add(indexOfPrefetchBackward, loadingItem)
}
previousModelsSize = models.size
}
fun update(viewState: RoomDetailViewState) {