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animate row removal

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This commit is contained in:
Levitating Pineapple
2024-08-17 22:45:36 +03:00
parent 71a3c511eb
commit d5090c3df2
1 changed files with 20 additions and 6 deletions
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26
apps/ios/Shared/Views/Chat/ReverseList.swift
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@@ -207,12 +207,16 @@ struct ReverseList<Item: Identifiable & Hashable & Sendable, Content: View>: UIV
i > 0 {
updateInProgress = true
// Update existing items without animation
_update(items: Array(items[i...]), animated: false) {
_update(items: Array(items[i...])) {
DispatchQueue.main.async {
// Added items animated by sliding from bottom (.top)
self._update(items: items, animated: self.isAtBottom) {
self._update(
items: items,
animated: self.isAtBottom,
rowAnimation: self.isAtBottom ? .top : .none
) {
self.updateInProgress = false
if self.isNearBottom { self.scrollToBottom(animated: true) }
if self.isNearBottom { self.scrollToBottom(animated: false) }
// Process update, which might have arrived before completion
if let items = self.retainedItems {
self.retainedItems = nil
@@ -222,17 +226,27 @@ struct ReverseList<Item: Identifiable & Hashable & Sendable, Content: View>: UIV
}
}
} else {
_update(items: items, animated: false)
let wasItemsRemoved = !items.isEmpty && items.count < itemCount
_update(
items: items,
animated: wasItemsRemoved,
rowAnimation: wasItemsRemoved ? .fade : .none
)
}
itemId = items.first?.id
itemCount = items.count
}
private func _update(items: [Item], animated: Bool, completion: (() -> Void)? = nil) {
private func _update(
items: [Item],
animated: Bool = false,
rowAnimation: UITableView.RowAnimation = .none,
completion: (() -> Void)? = nil
) {
var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
snapshot.appendSections([.main])
snapshot.appendItems(items)
dataSource.defaultRowAnimation = animated ? .top : .none
dataSource.defaultRowAnimation = rowAnimation
dataSource.apply(snapshot, animatingDifferences: animated, completion: completion)
}
}