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Remove notifications from the bottom when scrolling up notifications list

This commit is contained in:
Shadowfacts 2020-05-10 12:44:07 -04:00
parent 6d8c5f632c
commit 98529ca5af
Signed by untrusted user: shadowfacts
GPG Key ID: 94A5AB95422746E5
3 changed files with 42 additions and 13 deletions
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27
Tusker/Screens/Notifications/NotificationsTableViewController.swift
View File

@ -127,6 +127,33 @@ class NotificationsTableViewController: EnhancedTableViewController {
// MARK: - Table view delegate
override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
// see TimelineTableViewController.tableView(_:willDisplay:forRowAt:)
if !isCurrentlyScrollingToTop, scrollViewDirection < 0 {
let pageSize = 20
if groups.count > 2 * pageSize,
indexPath.row < groups.count - (2 * pageSize) {
let groupsToRemove = groups[groups.count - pageSize..<groups.count]
for group in groupsToRemove {
for notification in group.notifications {
// todo: reference count accounts
// mastodonController.persistentContainer.account(for: notification.account.id)?.decrementReferenceCount()
if let id = notification.status?.id {
mastodonController.persistentContainer.status(for: id)?.decrementReferenceCount()
}
}
}
let removedIndexPaths = (groups.count - 20..<groups.count).map { IndexPath(row: $0, section: 0) }
groups.removeLast(pageSize)
DispatchQueue.main.async {
UIView.performWithoutAnimation {
tableView.deleteRows(at: removedIndexPaths, with: .none)
}
}
}
}
if indexPath.row == groups.count - 1 {
guard let older = older else { return }

16
Tusker/Screens/Timeline/TimelineTableViewController.swift
View File

@ -19,9 +19,6 @@ class TimelineTableViewController: EnhancedTableViewController {
var newer: RequestRange?
var older: RequestRange?
private var prevScrollViewContentOffset: CGPoint?
private var scrollViewDirection: CGFloat = 0
init(for timeline: Timeline, mastodonController: MastodonController) {
self.timeline = timeline
self.mastodonController = mastodonController
@ -143,7 +140,7 @@ class TimelineTableViewController: EnhancedTableViewController {
for (id, _) in statusesToRemove {
mastodonController.persistentContainer.status(for: id)?.decrementReferenceCount()
}
timelineSegments[timelineSegments.count - 1].removeLast(20)
timelineSegments[timelineSegments.count - 1].removeLast(pageSize)
let removedIndexPaths = (lastSection.count - 20..<lastSection.count).map { IndexPath(row: $0, section: timelineSegments.count - 1) }
// Removing this DispatchQueue.main.async call causes things to break when scrolling
@ -197,6 +194,8 @@ class TimelineTableViewController: EnhancedTableViewController {
return (tableView.cellForRow(at: indexPath) as? TableViewSwipeActionProvider)?.trailingSwipeActionsConfiguration()
}
// MARK: Interaction
@objc func refreshStatuses(_ sender: Any) {
guard let newer = newer else { return }
@ -228,15 +227,6 @@ class TimelineTableViewController: EnhancedTableViewController {
}
}
// Mark: Scroll View Delegate
override func scrollViewDidScroll(_ scrollView: UIScrollView) {
if let prev = prevScrollViewContentOffset {
scrollViewDirection = scrollView.contentOffset.y - prev.y
}
prevScrollViewContentOffset = scrollView.contentOffset
}
@objc func composePressed(_ sender: Any) {
compose()
}

12
Tusker/Screens/Utilities/EnhancedTableViewController.swift
View File

@ -13,6 +13,10 @@ class EnhancedTableViewController: UITableViewController {
private var prevScrollToTopOffset: CGPoint? = nil
private(set) var isCurrentlyScrollingToTop = false
private var prevScrollViewContentOffset: CGPoint?
private(set) var scrollViewDirection: CGFloat = 0
// MARK: Scroll View Delegate
override func scrollViewShouldScrollToTop(_ scrollView: UIScrollView) -> Bool {
if let offset = prevScrollToTopOffset {
@ -37,6 +41,14 @@ class EnhancedTableViewController: UITableViewController {
prevScrollToTopOffset = nil
}
override func scrollViewDidScroll(_ scrollView: UIScrollView) {
if let prev = prevScrollViewContentOffset {
scrollViewDirection = scrollView.contentOffset.y - prev.y
}
prevScrollViewContentOffset = scrollView.contentOffset
}
// MARK: Table View Delegate
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) as? SelectableTableViewCell {