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Code Issues Projects Releases Packages Wiki Activity

Smoother scrolling up in the Timeline

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This commit is contained in:
Thomas Ricouard 2023-01-31 08:04:35 +01:00
parent bef45d8621
commit 1a351eaa7c
6 changed files with 47 additions and 24 deletions
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2
Packages/Account/Sources/Account/AccountDetailViewModel.swift
View file

@ -247,7 +247,7 @@ class AccountDetailViewModel: ObservableObject, StatusesFetcher {
}
}
func statusDidAppear(status: Models.Status) async {
func statusDidAppear(status: Models.Status) {
}
}

2
Packages/Status/Sources/Status/List/StatusesFetcher.swift
View file

@ -16,5 +16,5 @@ public protocol StatusesFetcher: ObservableObject {
var statusesState: StatusesState { get }
func fetchStatuses() async
func fetchNextPage() async
func statusDidAppear(status: Status) async
func statusDidAppear(status: Status)
}

4
Packages/Status/Sources/Status/List/StatusesListView.swift
View file

@ -56,9 +56,7 @@ public struct StatusesListView<Fetcher>: View where Fetcher: StatusesFetcher {
bottom: 12,
trailing: .layoutPadding))
.onAppear {
Task {
await fetcher.statusDidAppear(status: status)
}
fetcher.statusDidAppear(status: status)
}
if !isEmbdedInList {
Divider()

22
Packages/Timeline/Sources/Timeline/PendingStatusesObserver.swift Normal file
View file

@ -0,0 +1,22 @@
import Foundation
import SwiftUI
import Models
@MainActor
class PendingStatusesObserver: ObservableObject {
@Published var pendingStatusesCount: Int = 0
var pendingStatuses: [String] = [] {
didSet {
pendingStatusesCount = pendingStatuses.count
}
}
func removeStatus(status: Status) {
if let index = pendingStatuses.firstIndex(of: status.id) {
pendingStatuses.removeSubrange(index...(pendingStatuses.count - 1))
}
}
init() { }
}

13
Packages/Timeline/Sources/Timeline/TimelineView.swift
View file

@ -19,8 +19,10 @@ public struct TimelineView: View {
@EnvironmentObject private var routerPath: RouterPath
@StateObject private var viewModel = TimelineViewModel()
@StateObject private var pendingStatusesObserver = PendingStatusesObserver()
@State private var scrollProxy: ScrollViewProxy?
@Binding var timeline: TimelineFilter
@Binding var scrollToTopSignal: Int
@ -62,9 +64,14 @@ public struct TimelineView: View {
.navigationTitle(timeline.localizedTitle())
.navigationBarTitleDisplayMode(.inline)
.onAppear {
viewModel.pendingStatusesObserver = pendingStatusesObserver
if viewModel.client == nil {
viewModel.client = client
viewModel.timeline = timeline
} else {
Task {
await viewModel.fetchStatuses(userIntent: false)
}
}
}
.refreshable {
@ -105,15 +112,15 @@ public struct TimelineView: View {
@ViewBuilder
private func makePendingNewPostsView(proxy: ScrollViewProxy) -> some View {
if !viewModel.pendingStatuses.isEmpty {
if pendingStatusesObserver.pendingStatusesCount > 0 {
HStack(spacing: 6) {
Spacer()
Button {
withAnimation {
proxy.scrollTo(viewModel.pendingStatuses.last?.id, anchor: .bottom)
proxy.scrollTo(pendingStatusesObserver.pendingStatuses.last, anchor: .bottom)
}
} label: {
Text(viewModel.pendingStatusesButtonTitle)
Text("\(pendingStatusesObserver.pendingStatusesCount)")
}
.buttonStyle(.bordered)
.background(.thinMaterial)

28
Packages/Timeline/Sources/Timeline/TimelineViewModel.swift
View file

@ -17,13 +17,15 @@ class TimelineViewModel: ObservableObject, StatusesFetcher {
// Internal source of truth for a timeline.
private var statuses: [Status] = []
var pendingStatusesObserver: PendingStatusesObserver?
@Published var statusesState: StatusesState = .loading
@Published var timeline: TimelineFilter = .federated {
didSet {
Task {
if oldValue != timeline {
statuses = []
pendingStatuses = []
pendingStatusesObserver?.pendingStatuses = []
tag = nil
}
await fetchStatuses(userIntent: false)
@ -38,11 +40,7 @@ class TimelineViewModel: ObservableObject, StatusesFetcher {
}
@Published var tag: Tag?
@Published var pendingStatuses: [Status] = []
var pendingStatusesButtonTitle: LocalizedStringKey {
"\(pendingStatuses.count)"
}
@Published var pendingStatusesCount: Int = 0
var pendingStatusesEnabled: Bool {
timeline == .home
@ -60,7 +58,7 @@ class TimelineViewModel: ObservableObject, StatusesFetcher {
guard let client else { return }
do {
if statuses.isEmpty {
pendingStatuses = []
pendingStatusesObserver?.pendingStatuses = []
statusesState = .loading
statuses = try await client.get(endpoint: timeline.endpoint(sinceId: nil,
maxId: nil,
@ -69,11 +67,11 @@ class TimelineViewModel: ObservableObject, StatusesFetcher {
withAnimation {
statusesState = .display(statuses: statuses, nextPageState: statuses.count < 20 ? .none : .hasNextPage)
}
} else if let first = pendingStatuses.first ?? statuses.first {
} else if let first = statuses.first {
var newStatuses: [Status] = await fetchNewPages(minId: first.id, maxPages: 20)
if userIntent || !pendingStatusesEnabled {
statuses.insert(contentsOf: pendingStatuses, at: 0)
pendingStatuses = []
statuses.insert(contentsOf: newStatuses, at: 0)
pendingStatusesObserver?.pendingStatuses = []
withAnimation {
statusesState = .display(statuses: statuses, nextPageState: statuses.count < 20 ? .none : .hasNextPage)
}
@ -81,7 +79,7 @@ class TimelineViewModel: ObservableObject, StatusesFetcher {
newStatuses = newStatuses.filter { status in
!statuses.contains(where: { $0.id == status.id })
}
pendingStatuses.insert(contentsOf: newStatuses, at: 0)
pendingStatusesObserver?.pendingStatuses.insert(contentsOf: newStatuses.map{ $0.id }, at: 0)
statuses.insert(contentsOf: newStatuses, at: 0)
withAnimation {
statusesState = .display(statuses: statuses, nextPageState: statuses.count < 20 ? .none : .hasNextPage)
@ -145,7 +143,7 @@ class TimelineViewModel: ObservableObject, StatusesFetcher {
pendingStatusesEnabled,
!statuses.contains(where: { $0.id == event.status.id })
{
pendingStatuses.insert(event.status, at: 0)
pendingStatusesObserver?.pendingStatuses.insert(event.status.id, at: 0)
statuses.insert(event.status, at: 0)
withAnimation {
statusesState = .display(statuses: statuses, nextPageState: .hasNextPage)
@ -163,9 +161,7 @@ class TimelineViewModel: ObservableObject, StatusesFetcher {
}
}
func statusDidAppear(status: Status) async {
if let index = pendingStatuses.firstIndex(of: status) {
pendingStatuses.remove(at: index)
}
func statusDidAppear(status: Status) {
pendingStatusesObserver?.removeStatus(status: status)
}
}