Tweak compose placeholders

Tusker/Scenes/MainSceneDelegate.swift

@@ -218,9 +218,9 @@ class MainSceneDelegate: UIResponder, UIWindowSceneDelegate, TuskerSceneDelegate
             } else {
                 direction = .none
             }
-            container.setRoot(newRoot, animating: direction)
+            container.setRoot(newRoot, for: account, animating: direction)
         } else {
-            window!.rootViewController = AccountSwitchingContainerViewController(root: newRoot)
+            window!.rootViewController = AccountSwitchingContainerViewController(root: newRoot, for: account)
         }
     }
     

Tusker/Screens/Compose/MainComposeTextView.swift

@@ -9,29 +9,9 @@
 import SwiftUI
 import Pachyderm
 
-struct MainComposeTextView: View {
+struct MainComposeTextView: View, PlaceholderViewProvider {
     @ObservedObject var draft: Draft
-    @State private var placeholder: Text = {
+    @State private var placeholder: PlaceholderView = Self.placeholderView()
-        let components = Calendar.current.dateComponents([.month, .day], from: Date())
-        if components.month == 3 && components.day == 14 {
-            if Date().formatted(date: .numeric, time: .omitted).starts(with: "3") {
-                return Text("Happy π day!")
-            }
-        } else if components.month == 9 && components.day == 5 {
-            // https://weirder.earth/@noracodes/109276419847254552
-            // https://retrocomputing.stackexchange.com/questions/14763/what-warning-was-given-on-attempting-to-post-to-usenet-circa-1990
-            return Text("This program posts news to thousands of machines throughout the entire populated world. Please be sure you know what you are doing.").italic()
-        } else if components.month == 9 && components.day == 21 {
-            return Text("Do you remember?")
-        } else if components.month == 10 && components.day == 31 {
-            if .random() {
-                return Text("Post something spooky!")
-            } else {
-                return Text("Any questions?")
-            }
-        }
-        return Text("What's on your mind?")
-    }()
     
     let minHeight: CGFloat = 150
     @State private var height: CGFloat?
@@ -68,6 +48,38 @@ struct MainComposeTextView: View {
             }
         }
     }
+    
+    @ViewBuilder
+    static func placeholderView() -> some View {
+        let components = Calendar.current.dateComponents([.month, .day], from: Date())
+        if components.month == 3 && components.day == 14,
+           Date().formatted(date: .numeric, time: .omitted).starts(with: "3") {
+            Text("Happy π day!")
+        } else if components.month == 4 && components.day == 1 {
+            Text("April Fool's!").rotationEffect(.radians(.pi), anchor: .center)
+        } else if components.month == 9 && components.day == 5 {
+            // https://weirder.earth/@noracodes/109276419847254552
+            // https://retrocomputing.stackexchange.com/questions/14763/what-warning-was-given-on-attempting-to-post-to-usenet-circa-1990
+            Text("This program posts news to thousands of machines throughout the entire populated world. Please be sure you know what you are doing.").italic()
+        } else if components.month == 9 && components.day == 21 {
+            Text("Do you remember?")
+        } else if components.month == 10 && components.day == 31 {
+            if .random() {
+                Text("Post something spooky!")
+            } else {
+                Text("Any questions?")
+            }
+        } else {
+            Text("What's on your mind?")
+        }
+    }
+}
+
+// exists to provide access to the type alias since the @State property needs it to be explicit
+private protocol PlaceholderViewProvider {
+    associatedtype PlaceholderView: View
+    @ViewBuilder
+    static func placeholderView() -> PlaceholderView
 }
 
 struct MainComposeWrappedTextView: UIViewRepresentable {

Tusker/Screens/Main/AccountSwitchingContainerViewController.swift

@@ -11,9 +11,13 @@ import ScreenCorners
 
 class AccountSwitchingContainerViewController: UIViewController {
 
+    private var currentAccountID: String
     private(set) var root: TuskerRootViewController
     
-    init(root: TuskerRootViewController) {
+    private var userActivities: [String: NSUserActivity] = [:]
+    
+    init(root: TuskerRootViewController, for account: LocalData.UserAccountInfo) {
+        self.currentAccountID = account.id
         self.root = root
         
         super.init(nibName: nil, bundle: nil)
@@ -29,14 +33,27 @@ class AccountSwitchingContainerViewController: UIViewController {
         embedChild(root)
     }
     
-    func setRoot(_ newRoot: TuskerRootViewController, animating direction: AnimationDirection) {
+    func setRoot(_ newRoot: TuskerRootViewController, for account: LocalData.UserAccountInfo, animating direction: AnimationDirection) {
         let oldRoot = self.root
         if direction == .none {
             oldRoot.removeViewAndController()
         }
+        if let activity = oldRoot.stateRestorationActivity() {
+            stateRestorationLogger.debug("AccountSwitchingContainer: saving \(activity.activityType, privacy: .public) for \(self.currentAccountID, privacy: .public)")
+            userActivities[currentAccountID] = activity
+        }
+        
+        self.currentAccountID = account.id
         self.root = newRoot
         embedChild(newRoot)
         
+        if let activity = userActivities.removeValue(forKey: account.id) {
+            stateRestorationLogger.debug("AccountSwitchingContainer: restoring \(activity.activityType, privacy: .public) for \(account.id, privacy: .public)")
+            let context = StateRestorationUserActivityHandlingContext(root: newRoot)
+            _ = activity.handleResume(manager: UserActivityManager(scene: view.window!.windowScene!, context: context))
+            context.finalize(activity: activity)
+        }
+        
         if direction != .none {
             if UIAccessibility.prefersCrossFadeTransitions {
                 newRoot.view.alpha = 0

Tusker/Screens/Timeline/TimelineGapCollectionViewCell.swift

@@ -14,12 +14,13 @@ class TimelineGapCollectionViewCell: UICollectionViewCell {
     
     private let indicator = UIActivityIndicatorView(style: .medium)
     private let chevronView = AnimatingChevronView()
+    private let fillView = UIView()
     
     var fillGap: ((TimelineGapDirection) async -> Void)?
     
     override var isHighlighted: Bool {
         didSet {
-            backgroundColor = isHighlighted ? .appFill : .appGroupedBackground
+            backgroundColor = isHighlighted ? .appFill : .appSecondaryBackground
         }
     }
     
@@ -38,17 +39,22 @@ class TimelineGapCollectionViewCell: UICollectionViewCell {
     override init(frame: CGRect) {
         super.init(frame: frame)
         
-        backgroundColor = .appGroupedBackground
+        backgroundColor = .appSecondaryBackground
         
-        indicator.isHidden = true
+        fillView.backgroundColor = .tintColor
-        indicator.color = .tintColor
+        fillView.alpha = 0.75
+        fillView.layer.masksToBounds = true
+        fillView.layer.cornerRadius = 8
+        fillView.translatesAutoresizingMaskIntoConstraints = false
+        contentView.addSubview(fillView)
         
         let label = UILabel()
         label.text = "Load more"
         label.font = .preferredFont(forTextStyle: .headline)
         label.adjustsFontForContentSizeCategory = true
-        label.textColor = .tintColor
+        label.textColor = .white
         
+        chevronView.tintColor = .white
         chevronView.update(direction: .above)
         
         let stack = UIStackView(arrangedSubviews: [
@@ -60,15 +66,25 @@ class TimelineGapCollectionViewCell: UICollectionViewCell {
         stack.translatesAutoresizingMaskIntoConstraints = false
         contentView.addSubview(stack)
         
+        indicator.isHidden = true
+        indicator.color = .tintColor
         indicator.translatesAutoresizingMaskIntoConstraints = false
         contentView.addSubview(indicator)
         
         NSLayoutConstraint.activate([
             stack.centerXAnchor.constraint(equalTo: contentView.centerXAnchor),
             stack.centerYAnchor.constraint(equalTo: contentView.centerYAnchor),
-            indicator.trailingAnchor.constraint(equalTo: stack.leadingAnchor, constant: -8),
+            
+            fillView.leadingAnchor.constraint(equalTo: stack.leadingAnchor, constant: -8),
+            // optical centering, babey
+            fillView.trailingAnchor.constraint(equalTo: stack.trailingAnchor, constant: 10),
+            fillView.topAnchor.constraint(equalTo: stack.topAnchor, constant: -4),
+            fillView.bottomAnchor.constraint(equalTo: stack.bottomAnchor, constant: 4),
+            
+            indicator.trailingAnchor.constraint(equalTo: stack.leadingAnchor, constant: -12),
             indicator.centerYAnchor.constraint(equalTo: contentView.centerYAnchor),
-            contentView.heightAnchor.constraint(equalToConstant: 44),
+            
+            contentView.heightAnchor.constraint(equalToConstant: 52),
         ])
     }
     

Tusker/Screens/Timeline/TimelineViewController.swift

@@ -718,27 +718,15 @@ class TimelineViewController: UIViewController, TimelineLikeCollectionViewContro
     }
     
     @objc func refresh() {
-        Task {
+        Task { @MainActor in
             if case .notLoadedInitial = controller.state {
                 await controller.loadInitial()
-                #if !targetEnvironment(macCatalyst)
-                collectionView.refreshControl?.endRefreshing()
-                #endif
             } else {
-                @MainActor
+                await controller.loadNewer()
-                func loadNewerAndEndRefreshing() async {
-                    await controller.loadNewer()
-                    #if !targetEnvironment(macCatalyst)
-                    collectionView.refreshControl?.endRefreshing()
-                    #endif
-                }
-                
-                // I'm not sure whether this should move into TimelineLikeController/TimelineLikeCollectionViewController
-                let (_, presentItems) = await (loadNewerAndEndRefreshing(), try? loadInitial())
-                if let presentItems, !presentItems.isEmpty {
-                    insertPresentItemsAndShowJumpToast(presentItems)
-                }
             }
+            #if !targetEnvironment(macCatalyst)
+            collectionView.refreshControl?.endRefreshing()
+            #endif
         }
     }
     

Tusker/Shortcuts/UserActivityManager.swift

@@ -32,15 +32,6 @@ class UserActivityManager {
         scene.session.mastodonController!
     }
     
-    private func getMainViewController() -> TuskerRootViewController {
-        let window = scene.windows.first { $0.isKeyWindow } ?? scene.windows.first!
-        return window.rootViewController as! TuskerRootViewController
-    }
-    
-    private func present(_ vc: UIViewController, animated: Bool = true) {
-        getMainViewController().present(vc, animated: animated)
-    }
-    
     static func getAccount(from activity: NSUserActivity) -> LocalData.UserAccountInfo? {
         guard let id = activity.userInfo?["accountID"] as? String else {
             return nil
@@ -213,25 +204,26 @@ class UserActivityManager {
     func handleShowTimeline(activity: NSUserActivity) {
         guard let (timeline, positionInfo) = Self.getTimeline(from: activity) else { return }
         
-        let timelineVC: TimelineViewController
+        var timelineVC: TimelineViewController?
         if let pinned = PinnedTimeline(timeline: timeline),
            mastodonController.accountPreferences.pinnedTimelines.contains(pinned) {
             context.select(route: .timelines)
             context.popToRoot()
             let pageController = context.topViewController as! TimelinesPageViewController
             pageController.selectTimeline(pinned, animated: false)
-            timelineVC = pageController.currentViewController as! TimelineViewController
+            timelineVC = pageController.currentViewController as? TimelineViewController
         } else if case .list(let id) = timeline {
             context.select(route: .list(id: id))
-            timelineVC = context.topViewController! as! TimelineViewController
+            timelineVC = context.topViewController as? TimelineViewController
         } else {
             context.select(route: .explore)
             context.popToRoot()
             timelineVC = TimelineViewController(for: timeline, mastodonController: mastodonController)
-            context.push(timelineVC)
+            context.push(timelineVC!)
         }
         
-        if let positionInfo,
+        if let timelineVC,
+           let positionInfo,
            context.isHandoff {
             Task {
                 await timelineVC.restoreStateFromHandoff(statusIDs: positionInfo.statusIDs, centerStatusID: positionInfo.centerStatusID)