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For #13016 - Only scroll to current page in tab history after the initial layout.

master
Kainalu Hagiwara 2020-08-03 13:55:37 -07:00 committed by Jeff Boek
parent 52d4ffdef0
commit a5e9542a6b
1 changed files with 16 additions and 9 deletions

View File

@ -34,18 +34,25 @@ class TabHistoryView(
private val adapter = TabHistoryAdapter(interactor)
private val layoutManager = object : LinearLayoutManager(containerView.context) {
private var shouldScrollToSelected = true
override fun onLayoutCompleted(state: RecyclerView.State?) {
super.onLayoutCompleted(state)
currentIndex?.let { index ->
// Force expansion of the dialog, otherwise scrolling to the current history item
// won't work when its position is near the bottom of the recyclerview.
expandDialog.invoke()
// Also, attempt to center the current history item.
val itemView = tabHistoryRecyclerView.findViewHolderForLayoutPosition(
findFirstCompletelyVisibleItemPosition()
)?.itemView
val offset = tabHistoryRecyclerView.height / 2 - (itemView?.height ?: 0) / 2
scrollToPositionWithOffset(index, offset)
// Attempt to center the current history item after the first layout is completed,
// but not after subsequent layouts
if (shouldScrollToSelected) {
// Force expansion of the dialog, otherwise scrolling to the current history item
// won't work when its position is near the bottom of the recyclerview.
expandDialog.invoke()
val itemView = tabHistoryRecyclerView.findViewHolderForLayoutPosition(
findFirstCompletelyVisibleItemPosition()
)?.itemView
val offset = tabHistoryRecyclerView.height / 2 - (itemView?.height ?: 0) / 2
scrollToPositionWithOffset(index, offset)
shouldScrollToSelected = false
}
}
}
}.apply {