forked from shadowfacts/Tusker
Prune offscreen rows on new timeline
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e78bec8409
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@ -160,7 +160,7 @@ class TimelineViewController: UIViewController, TimelineLikeCollectionViewContro
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override func viewDidDisappear(_ animated: Bool) {
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super.viewDidDisappear(animated)
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// TODO: prune offscreen rows
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pruneOffscreenRows()
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}
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private func removeTimelineDescriptionCell() {
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@ -170,6 +170,25 @@ class TimelineViewController: UIViewController, TimelineLikeCollectionViewContro
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isShowingTimelineDescription = false
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}
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private func pruneOffscreenRows() {
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guard let lastVisibleIndexPath = collectionView.indexPathsForVisibleItems.last else {
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return
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}
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var snapshot = dataSource.snapshot()
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let items = snapshot.itemIdentifiers(inSection: .statuses)
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let pageSize = 20
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let numberOfPagesToPrune = (items.count - lastVisibleIndexPath.row - 1) / pageSize
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if numberOfPagesToPrune > 0 {
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let itemsToRemove = Array(items.suffix(numberOfPagesToPrune * pageSize))
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snapshot.deleteItems(itemsToRemove)
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}
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dataSource.apply(snapshot, animatingDifferences: false)
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if case .status(id: let id, state: _) = snapshot.itemIdentifiers(inSection: .statuses).last {
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older = .before(id: id, count: nil)
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}
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}
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@objc func refresh() {
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Task {
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await controller.loadNewer()
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