Fix signing into API-restricted instances

Closes #556

CHANGELOG-release.md

@@ -1,3 +1,13 @@
+## 2024.5
+Features/Improvements:
+- Improve gallery animations
+
+Bugfixes:
+- Handle right-to-left text in display names
+- Fix crash during gifv playback
+- iPadOS: Fix app becoming unresponsive when switching accounts
+- iPadOS/macOS: Fix Cmd+R shortcuts not working
+
 ## 2024.4
 This release introduces support for iOS 18, including a new sidebar/tab bar on iPad, as well as bugfixes and improvements.
 

CHANGELOG.md

@@ -1,5 +1,33 @@
 # Changelog
 
+## 2024.5 (141)
+Bugfixes:
+- Fix gallery controls being positioned incorrectly during dismiss animation on certain devices
+- Fix gallery controls being positioned incorrectly in landscape orientations
+
+## 2024.5 (139)
+Bugfixes:
+- Fix error decoding certain posts
+
+## 2024.5 (138)
+Bugfixes:
+- Fix potential crash when displaying certain attachments
+- Fix potential crash due to race condition when opening push notification in app
+- Fix misaligned text between profile field values/labels
+- Fix rate limited error message not including reset timestamp
+- iPadOS/macOS: Fix Cmd+R shortcut not working
+
+## 2024.5 (137)
+Features/Improvements:
+- Improve gallery presentation/dismissal transitions
+
+Bugfixes:
+- Account for bidirectional text in display names
+- Fix crash when playing back gifv
+- Fix gallery controls not hiding if video loading fails
+- iPadOS: Fix incorrect gallery dismiss animation on non-fullscreen windows
+- iPadOS: Fix hang when switching accounts
+
 ## 2024.4 (136)
 Features/Improvements:
 - Import image description when adding attachments from Photos if possible

NotificationExtension/NotificationService.swift

@@ -371,13 +371,14 @@ private struct HTMLCallbacks: HTMLConversionCallbacks {
         // Converting WebURL to URL is a small but non-trivial expense (since it works by
         // serializing the WebURL as a string and then having Foundation parse it again),
         // so, if available, use the system parser which doesn't require another round trip.
-        if let url = try? URL.ParseStrategy().parse(string) {
+        if #available(iOS 16.0, macOS 13.0, *),
+           let url = try? URL.ParseStrategy().parse(string) {
             url
         } else if let web = WebURL(string),
                   let url = URL(web) {
             url
         } else {
-            nil
+            URL(string: string)
         }
     }
     

Packages/ComposeUI/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "ComposeUI",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.

Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentRowController.swift

@@ -156,7 +156,7 @@ class AttachmentRowController: ViewController {
                         Button(role: .destructive, action: controller.removeAttachment) {
                             Label("Delete", systemImage: "trash")
                         }
-                    } preview: {
+                    } previewIfAvailable: {
                         ControllerView(controller: { controller.thumbnailController })
                     }
                 
@@ -221,3 +221,16 @@ extension AttachmentRowController {
         case allowEntry, recognizingText
     }
 }
+
+private extension View {
+    @available(iOS, obsoleted: 16.0)
+    @available(visionOS 1.0, *)
+    @ViewBuilder
+    func contextMenu<M: View, P: View>(@ViewBuilder menuItems: () -> M, @ViewBuilder previewIfAvailable preview: () -> P) -> some View {
+        if #available(iOS 16.0, *) {
+            self.contextMenu(menuItems: menuItems, preview: preview)
+        } else {
+            self.contextMenu(menuItems: menuItems)
+        }
+    }
+}

Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentsListController.swift

@@ -214,6 +214,44 @@ fileprivate extension View {
             self
         }
     }
+    
+    @available(iOS, obsoleted: 16.0)
+    @ViewBuilder
+    func sheetOrPopover(isPresented: Binding<Bool>, @ViewBuilder content: @escaping () -> some View) -> some View {
+        if #available(iOS 16.0, *) {
+            self.modifier(SheetOrPopover(isPresented: isPresented, view: content))
+        } else {
+            self.popover(isPresented: isPresented, content: content)
+        }
+    }
+    
+    @available(iOS, obsoleted: 16.0)
+    @ViewBuilder
+    func withSheetDetentsIfAvailable() -> some View {
+        if #available(iOS 16.0, *) {
+            self
+                .presentationDetents([.medium, .large])
+                .presentationDragIndicator(.visible)
+        } else {
+            self
+        }
+    }
+}
+
+@available(iOS 16.0, *)
+fileprivate struct SheetOrPopover<V: View>: ViewModifier {
+    @Binding var isPresented: Bool
+    @ViewBuilder let view: () -> V
+    
+    @Environment(\.horizontalSizeClass) var sizeClass
+    
+    func body(content: Content) -> some View {
+        if sizeClass == .compact {
+            content.sheet(isPresented: $isPresented, content: view)
+        } else {
+            content.popover(isPresented: $isPresented, content: view)
+        }
+    }
 }
 
 @available(visionOS 1.0, *)

Packages/ComposeUI/Sources/ComposeUI/Controllers/ComposeController.swift

@@ -125,7 +125,9 @@ public final class ComposeController: ViewController {
         self.toolbarController = ToolbarController(parent: self)
         self.attachmentsListController = AttachmentsListController(parent: self)
         
-        NotificationCenter.default.addObserver(self, selector: #selector(currentInputModeChanged), name: UITextInputMode.currentInputModeDidChangeNotification, object: nil)
+        if #available(iOS 16.0, *) {
+            NotificationCenter.default.addObserver(self, selector: #selector(currentInputModeChanged), name: UITextInputMode.currentInputModeDidChangeNotification, object: nil)
+        }
         NotificationCenter.default.addObserver(self, selector: #selector(managedObjectsDidChange), name: .NSManagedObjectContextObjectsDidChange, object: DraftsPersistentContainer.shared.viewContext)
     }
     
@@ -322,6 +324,10 @@ public final class ComposeController: ViewController {
                         ControllerView(controller: { controller.toolbarController })
                         #endif
                     }
+                    #if !os(visionOS)
+                    // on iPadOS15, the toolbar ends up below the keyboard's toolbar without this
+                    .padding(.bottom, keyboardInset)
+                    #endif
                     .transition(.move(edge: .bottom))
                 }
             }
@@ -430,7 +436,7 @@ public final class ComposeController: ViewController {
             }
             .listStyle(.plain)
             #if !os(visionOS)
-            .scrollDismissesKeyboard(.interactively)
+            .scrollDismissesKeyboardInteractivelyIfAvailable()
             #endif
             .disabled(controller.isPosting)
         }
@@ -481,6 +487,31 @@ public final class ComposeController: ViewController {
             .keyboardShortcut(.return, modifiers: .command)
             .disabled(!controller.postButtonEnabled)
         }
+        
+        #if !os(visionOS)
+        @available(iOS, obsoleted: 16.0)
+        private var keyboardInset: CGFloat {
+            if #unavailable(iOS 16.0),
+               UIDevice.current.userInterfaceIdiom == .pad,
+               keyboardReader.isVisible {
+                return ToolbarController.height
+            } else {
+                return 0
+            }
+        }
+        #endif
+    }
+}
+
+private extension View {
+    @available(iOS, obsoleted: 16.0)
+    @ViewBuilder
+    func scrollDismissesKeyboardInteractivelyIfAvailable() -> some View {
+        if #available(iOS 16.0, *) {
+            self.scrollDismissesKeyboard(.interactively)
+        } else {
+            self
+        }
     }
 }
 

Packages/ComposeUI/Sources/ComposeUI/Controllers/FocusedAttachmentController.swift

@@ -51,11 +51,14 @@ class FocusedAttachmentController: ViewController {
                         .onAppear {
                             player.play()
                         }
-                } else {
+                } else if #available(iOS 16.0, *) {
                     ZoomableScrollView {
                         attachmentView
                             .matchedGeometryDestination(id: attachment.id)
                     }
+                } else {
+                    attachmentView
+                        .matchedGeometryDestination(id: attachment.id)
                 }
                 
                 Spacer(minLength: 0)

Packages/ComposeUI/Sources/ComposeUI/Controllers/PollController.swift

@@ -96,7 +96,7 @@ class PollController: ViewController {
                     .onMove(perform: controller.moveOptions)
                 }
                 .listStyle(.plain)
-                .scrollDisabled(true)
+                .scrollDisabledIfAvailable(true)
                 .frame(height: 44 * CGFloat(poll.options.count))
                 
                 Button(action: controller.addOption) {

Packages/ComposeUI/Sources/ComposeUI/Controllers/ToolbarController.swift

@@ -66,7 +66,7 @@ class ToolbarController: ViewController {
                             }
                     })
             }
-            .scrollDisabled(realWidth ?? 0 <= minWidth ?? 0)
+            .scrollDisabledIfAvailable(realWidth ?? 0 <= minWidth ?? 0)
             .frame(height: ToolbarController.height)
             .frame(maxWidth: .infinity)
             .background(.regularMaterial, ignoresSafeAreaEdges: [.bottom, .leading, .trailing])
@@ -122,7 +122,8 @@ class ToolbarController: ViewController {
                 
                 Spacer()
                 
-                if composeController.mastodonController.instanceFeatures.createStatusWithLanguage {
+                if #available(iOS 16.0, *),
+                   composeController.mastodonController.instanceFeatures.createStatusWithLanguage {
                     LanguagePicker(draftLanguage: $draft.language, hasChangedSelection: $composeController.hasChangedLanguageSelection)
                 }
             }

Packages/ComposeUI/Sources/ComposeUI/KeyboardReader.swift

@@ -10,6 +10,7 @@
 import UIKit
 import Combine
 
+@available(iOS, obsoleted: 16.0)
 class KeyboardReader: ObservableObject {
 //    @Published var isVisible = false
     @Published var keyboardHeight: CGFloat = 0

Packages/ComposeUI/Sources/ComposeUI/View+ForwardsCompat.swift

@@ -0,0 +1,26 @@
+//
+//  View+ForwardsCompat.swift
+//  ComposeUI
+//
+//  Created by Shadowfacts on 3/25/23.
+//
+
+import SwiftUI
+
+extension View {
+    #if os(visionOS)
+    func scrollDisabledIfAvailable(_ disabled: Bool) -> some View {
+        self.scrollDisabled(disabled)
+    }
+    #else
+    @available(iOS, obsoleted: 16.0)
+    @ViewBuilder
+    func scrollDisabledIfAvailable(_ disabled: Bool) -> some View {
+        if #available(iOS 16.0, *) {
+            self.scrollDisabled(disabled)
+        } else {
+            self
+        }
+    }
+    #endif
+}

Packages/Duckable/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "Duckable",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.

Packages/GalleryVC/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "GalleryVC",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, making them visible to other packages.
@@ -14,11 +14,15 @@ let package = Package(
             name: "GalleryVC",
             targets: ["GalleryVC"]),
     ],
+    dependencies: [
+        .package(path: "../TuskerComponents"),
+    ],
     targets: [
         // Targets are the basic building blocks of a package, defining a module or a test suite.
         // Targets can depend on other targets in this package and products from dependencies.
         .target(
             name: "GalleryVC",
+            dependencies: ["TuskerComponents"],
             swiftSettings: [
                 .swiftLanguageMode(.v5)
             ]),

Packages/GalleryVC/Sources/GalleryVC/Content/FallbackGalleryContentViewController.swift

@@ -1,15 +1,13 @@
 //
 //  FallbackGalleryContentViewController.swift
-//  Tusker
+//  GalleryVC
 //
 //  Created by Shadowfacts on 3/18/24.
 //  Copyright © 2024 Shadowfacts. All rights reserved.
 //
 
 import UIKit
-import GalleryVC
 import QuickLook
-import Pachyderm
 
 private class FallbackGalleryContentViewController: QLPreviewController {
     private let previewItem = GalleryPreviewItem()
@@ -52,40 +50,40 @@ extension FallbackGalleryContentViewController: QLPreviewControllerDataSource {
     }
 }
 
-class FallbackGalleryNavigationController: UINavigationController, GalleryContentViewController {
-    init(url: URL) {
+public class FallbackGalleryNavigationController: UINavigationController, GalleryContentViewController {
+    public init(url: URL) {
         super.init(nibName: nil, bundle: nil)
         self.viewControllers = [FallbackGalleryContentViewController(url: url)]
     }
     
-    override func viewDidLoad() {
+    public override func viewDidLoad() {
         super.viewDidLoad()
         
         container?.disableGalleryScrollAndZoom()
     }
     
-    required init?(coder aDecoder: NSCoder) {
+    public required init?(coder aDecoder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
     // MARK: GalleryContentViewController
     
-    weak var container: (any GalleryVC.GalleryContentViewControllerContainer)?
+    public weak var container: (any GalleryContentViewControllerContainer)?
     
-    var contentSize: CGSize {
+    public var contentSize: CGSize {
         .zero
     }
     
-    var activityItemsForSharing: [Any] {
+    public var activityItemsForSharing: [Any] {
         []
     }
     
-    var caption: String? {
+    public var caption: String? {
         nil
     }
     
-    var canAnimateFromSourceView: Bool {
-        false
+    public var presentationAnimation: GalleryContentPresentationAnimation {
+        .fade
     }
 }
 

Packages/GalleryVC/Sources/GalleryVC/Content/ImageGalleryContentViewController.swift

@@ -1,22 +1,22 @@
 //
 //  ImageGalleryContentViewController.swift
-//  Tusker
+//  GalleryVC
 //
 //  Created by Shadowfacts on 3/17/24.
 //  Copyright © 2024 Shadowfacts. All rights reserved.
 //
 
 import UIKit
-import GalleryVC
-import Pachyderm
 import TuskerComponents
 @preconcurrency import VisionKit
 
-class ImageGalleryContentViewController: UIViewController, GalleryContentViewController {
-    let url: URL
-    let caption: String?
-    let originalData: Data?
-    let image: UIImage
+open class ImageGalleryContentViewController: UIViewController, GalleryContentViewController {
+    public let caption: String?
+    public var image: UIImage {
+        didSet {
+            imageView?.image = image
+        }
+    }
     let gifController: GIFController?
     
     private var imageView: GIFImageView!
@@ -27,12 +27,8 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
     @available(iOS 16.0, macCatalyst 17.0, *)
     private var analysisInteraction: ImageAnalysisInteraction? { _analysisInteraction as? ImageAnalysisInteraction }
     
-    private var isGrayscale = false
-    
-    init(url: URL, caption: String?, originalData: Data?, image: UIImage, gifController: GIFController?) {
-        self.url = url
+    public init(image: UIImage, caption: String?, gifController: GIFController?) {
         self.caption = caption
-        self.originalData = originalData
         self.image = image
         self.gifController = gifController
         
@@ -41,21 +37,14 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
         preferredContentSize = image.size
     }
     
-    required init?(coder: NSCoder) {
+    public required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
-    override func viewDidLoad() {
+    public override func viewDidLoad() {
         super.viewDidLoad()
         
-        isGrayscale = Preferences.shared.grayscaleImages
-        let maybeGrayscaleImage = if isGrayscale {
-            ImageGrayscalifier.convert(url: url, image: image) ?? image
-        } else {
-            image
-        }
-        
-        imageView = GIFImageView(image: maybeGrayscaleImage)
+        imageView = GIFImageView(image: image)
         imageView.translatesAutoresizingMaskIntoConstraints = false
         imageView.contentMode = .scaleAspectFill
         imageView.isUserInteractionEnabled = true
@@ -86,11 +75,9 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
                 }
             }
         }
-        
-        NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
     }
     
-    override func viewWillAppear(_ animated: Bool) {
+    public override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
         
         if let gifController {
@@ -98,37 +85,23 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
         }
     }
     
-    @objc private func preferencesChanged() {
-        if isGrayscale != Preferences.shared.grayscaleImages {
-            isGrayscale = Preferences.shared.grayscaleImages
-            let image = if isGrayscale {
-                ImageGrayscalifier.convert(url: url, image: image)
-            } else {
-                image
-            }
-            if let image {
-                imageView.image = image
-            }
-        }
-    }
-    
     // MARK: GalleryContentViewController
     
-    weak var container: (any GalleryVC.GalleryContentViewControllerContainer)?
+    public weak var container: (any GalleryContentViewControllerContainer)?
     
-    var contentSize: CGSize {
+    public var contentSize: CGSize {
         image.size
     }
     
-    var activityItemsForSharing: [Any] {
-        if let data = originalData ?? image.pngData() {
-            return [ImageActivityItemSource(data: data, url: url, image: image)]
-        } else {
-            return []
-        }
+    open var activityItemsForSharing: [Any] {
+        return [image]
     }
     
-    func setControlsVisible(_ visible: Bool, animated: Bool, dueToUserInteraction: Bool) {
+    public var presentationAnimation: GalleryContentPresentationAnimation {
+        gifController != nil ? .fromSourceViewWithoutSnapshot : .fromSourceView
+    }
+    
+    public func setControlsVisible(_ visible: Bool, animated: Bool, dueToUserInteraction: Bool) {
         if #available(iOS 16.0, macCatalyst 17.0, *),
            let analysisInteraction {
             analysisInteraction.setSupplementaryInterfaceHidden(!visible, animated: animated)
@@ -138,7 +111,7 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
 
 @available(iOS 16.0, macCatalyst 17.0, *)
 extension ImageGalleryContentViewController: ImageAnalysisInteractionDelegate {
-    func interaction(_ interaction: ImageAnalysisInteraction, shouldBeginAt point: CGPoint, for interactionType: ImageAnalysisInteraction.InteractionTypes) -> Bool {
+    public func interaction(_ interaction: ImageAnalysisInteraction, shouldBeginAt point: CGPoint, for interactionType: ImageAnalysisInteraction.InteractionTypes) -> Bool {
         return container?.galleryControlsVisible ?? true
     }
 }

Packages/GalleryVC/Sources/GalleryVC/Content/LoadingGalleryContentViewController.swift

@@ -7,43 +7,42 @@
 //
 
 import UIKit
-import GalleryVC
 
-class LoadingGalleryContentViewController: UIViewController, GalleryContentViewController {
+public class LoadingGalleryContentViewController: UIViewController, GalleryContentViewController {
     private let fallbackCaption: String?
     private let provider: () async -> (any GalleryContentViewController)?
     private var wrapped: (any GalleryContentViewController)!
     
-    weak var container: GalleryContentViewControllerContainer?
+    public weak var container: GalleryContentViewControllerContainer?
     
-    var contentSize: CGSize {
+    public var contentSize: CGSize {
         wrapped?.contentSize ?? .zero
     }
     
-    var activityItemsForSharing: [Any] {
+    public var activityItemsForSharing: [Any] {
         wrapped?.activityItemsForSharing ?? []
     }
     
-    var caption: String? {
+    public var caption: String? {
         wrapped?.caption ?? fallbackCaption
     }
     
-    var canAnimateFromSourceView: Bool {
-        wrapped?.canAnimateFromSourceView ?? true
+    public var presentationAnimation: GalleryContentPresentationAnimation {
+        wrapped?.presentationAnimation ?? .fade
     }
     
-    init(caption: String?, provider: @escaping () async -> (any GalleryContentViewController)?) {
+    public init(caption: String?, provider: @escaping () async -> (any GalleryContentViewController)?) {
         self.fallbackCaption = caption
         self.provider = provider
         
         super.init(nibName: nil, bundle: nil)
     }
     
-    required init?(coder: NSCoder) {
+    public required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
-    override func viewDidLoad() {
+    public override func viewDidLoad() {
         super.viewDidLoad()
         
         container?.setGalleryContentLoading(true)
@@ -81,7 +80,7 @@ class LoadingGalleryContentViewController: UIViewController, GalleryContentViewC
         
         let label = UILabel()
         label.text = "Error Loading"
-        label.font = .preferredFont(forTextStyle: .title1).withTraits(.traitBold)!
+        label.font = UIFont(descriptor: .preferredFontDescriptor(withTextStyle: .title1).withSymbolicTraits(.traitBold)!, size: 0)
         label.textColor = .secondaryLabel
         label.adjustsFontForContentSizeCategory = true
         
@@ -102,15 +101,15 @@ class LoadingGalleryContentViewController: UIViewController, GalleryContentViewC
         ])
     }
     
-    func setControlsVisible(_ visible: Bool, animated: Bool, dueToUserInteraction: Bool) {
+    public func setControlsVisible(_ visible: Bool, animated: Bool, dueToUserInteraction: Bool) {
         wrapped?.setControlsVisible(visible, animated: animated, dueToUserInteraction: dueToUserInteraction)
     }
     
-    func galleryContentDidAppear() {
+    public func galleryContentDidAppear() {
         wrapped?.galleryContentDidAppear()
     }
     
-    func galleryContentWillDisappear() {
+    public func galleryContentWillDisappear() {
         wrapped?.galleryContentWillDisappear()
     }
     

Packages/GalleryVC/Sources/GalleryVC/Content/VideoControlsViewController.swift

@@ -1,6 +1,6 @@
 //
 //  VideoControlsViewController.swift
-//  Tusker
+//  GalleryVC
 //
 //  Created by Shadowfacts on 3/21/24.
 //  Copyright © 2024 Shadowfacts. All rights reserved.
@@ -9,6 +9,15 @@
 import UIKit
 import AVFoundation
 
+@propertyWrapper
+final class Box<T> {
+    var wrappedValue: T
+    
+    init(wrappedValue: T) {
+        self.wrappedValue = wrappedValue
+    }
+}
+
 class VideoControlsViewController: UIViewController {
     private static let formatter: DateComponentsFormatter = {
         let f = DateComponentsFormatter()
@@ -18,33 +27,49 @@ class VideoControlsViewController: UIViewController {
     }()
 
     private let player: AVPlayer
+    #if !os(visionOS)
+    @Box private var playbackSpeed: Float
+    #endif
     
-    private lazy var muteButton = MuteButton().configure {
-        $0.addTarget(self, action: #selector(muteButtonPressed), for: .touchUpInside)
-        $0.setMuted(false, animated: false)
-    }
+    private lazy var muteButton: MuteButton = {
+        let button = MuteButton()
+        button.addTarget(self, action: #selector(muteButtonPressed), for: .touchUpInside)
+        button.setMuted(false, animated: false)
+        return button
+    }()
     
-    private let timestampLabel = UILabel().configure {
-        $0.text = "0:00"
-        $0.font = UIFontMetrics(forTextStyle: .caption1).scaledFont(for: .monospacedDigitSystemFont(ofSize: 13, weight: .regular))
-    }
+    private let timestampLabel: UILabel = {
+        let label = UILabel()
+        label.text = "0:00"
+        label.font = UIFontMetrics(forTextStyle: .caption1).scaledFont(for: .monospacedDigitSystemFont(ofSize: 13, weight: .regular))
+        return label
+    }()
     
-    private lazy var scrubbingControl = VideoScrubbingControl().configure {
-        $0.heightAnchor.constraint(equalToConstant: 44).isActive = true
-        $0.addTarget(self, action: #selector(scrubbingStarted), for: .editingDidBegin)
-        $0.addTarget(self, action: #selector(scrubbingChanged), for: .editingChanged)
-        $0.addTarget(self, action: #selector(scrubbingEnded), for: .editingDidEnd)
-    }
+    private lazy var scrubbingControl: VideoScrubbingControl = {
+        let control = VideoScrubbingControl()
+        control.heightAnchor.constraint(equalToConstant: 44).isActive = true
+        control.addTarget(self, action: #selector(scrubbingStarted), for: .editingDidBegin)
+        control.addTarget(self, action: #selector(scrubbingChanged), for: .editingChanged)
+        control.addTarget(self, action: #selector(scrubbingEnded), for: .editingDidEnd)
+        return control
+    }()
     
-    private let timeRemainingLabel = UILabel().configure {
-        $0.text = "-0:00"
-        $0.font = UIFontMetrics(forTextStyle: .caption1).scaledFont(for: .monospacedDigitSystemFont(ofSize: 13, weight: .regular))
-    }
+    private let timeRemainingLabel: UILabel = {
+        let label = UILabel()
+        label.text = "-0:00"
+        label.font = UIFontMetrics(forTextStyle: .caption1).scaledFont(for: .monospacedDigitSystemFont(ofSize: 13, weight: .regular))
+        return label
+    }()
     
     private lazy var optionsButton = MenuButton { [unowned self] in
         let imageName: String
+        #if os(visionOS)
+        let playbackSpeed = player.defaultRate
+        #else
+        let playbackSpeed = self.playbackSpeed
+        #endif
         if #available(iOS 17.0, *) {
-            switch player.defaultRate {
+            switch playbackSpeed {
             case 0.5:
                 imageName = "gauge.with.dots.needle.0percent"
             case 1:
@@ -60,8 +85,12 @@ class VideoControlsViewController: UIViewController {
             imageName = "speedometer"
         }
         let speedMenu = UIMenu(title: "Playback Speed", image: UIImage(systemName: imageName), children: PlaybackSpeed.allCases.map { speed in
-            UIAction(title: speed.displayName, state: self.player.defaultRate == speed.rate ? .on : .off) { [unowned self] _ in
+            UIAction(title: speed.displayName, state: playbackSpeed == speed.rate ? .on : .off) { [unowned self] _ in
+                #if os(visionOS)
                 self.player.defaultRate = speed.rate
+                #else
+                self.playbackSpeed = speed.rate
+                #endif
                 if self.player.rate > 0 {
                     self.player.rate = speed.rate
                 }
@@ -70,17 +99,19 @@ class VideoControlsViewController: UIViewController {
         return UIMenu(children: [speedMenu])
     }
     
-    private lazy var hStack = UIStackView(arrangedSubviews: [
-        muteButton,
-        timestampLabel,
-        scrubbingControl,
-        timeRemainingLabel,
-        optionsButton,
-    ]).configure {
-        $0.axis = .horizontal
-        $0.spacing = 8
-        $0.alignment = .center
-    }
+    private lazy var hStack: UIStackView = {
+        let stack = UIStackView(arrangedSubviews: [
+            muteButton,
+            timestampLabel,
+            scrubbingControl,
+            timeRemainingLabel,
+            optionsButton,
+        ])
+        stack.axis = .horizontal
+        stack.spacing = 8
+        stack.alignment = .center
+        return stack
+    }()
 
     private var timestampObserverToken: Any?
     private var scrubberObserverToken: Any?
@@ -89,11 +120,20 @@ class VideoControlsViewController: UIViewController {
     private var scrubbingTargetTime: CMTime?
     private var isSeeking = false
     
+    #if os(visionOS)
     init(player: AVPlayer) {
         self.player = player
         
         super.init(nibName: nil, bundle: nil)
     }
+    #else
+    init(player: AVPlayer, playbackSpeed: Box<Float>) {
+        self.player = player
+        self._playbackSpeed = playbackSpeed
+        
+        super.init(nibName: nil, bundle: nil)
+    }
+    #endif
     
     required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
@@ -177,7 +217,11 @@ class VideoControlsViewController: UIViewController {
     @objc private func scrubbingEnded() {
         scrubbingChanged()
         if wasPlayingWhenScrubbingStarted {
+            #if os(visionOS)
             player.play()
+            #else
+            player.rate = playbackSpeed
+            #endif
         }
     }
     

Packages/GalleryVC/Sources/GalleryVC/Content/VideoGalleryContentViewController.swift

@@ -1,68 +1,58 @@
 //
 //  VideoGalleryContentViewController.swift
-//  Tusker
+//  GalleryVC
 //
 //  Created by Shadowfacts on 3/19/24.
 //  Copyright © 2024 Shadowfacts. All rights reserved.
 //
 
 import UIKit
-import GalleryVC
 import AVFoundation
 import CoreImage
 
-class VideoGalleryContentViewController: UIViewController, GalleryContentViewController {
-    private let url: URL
-    let caption: String?
-    private var item: AVPlayerItem
-    let player: AVPlayer
+open class VideoGalleryContentViewController: UIViewController, GalleryContentViewController {
+    public let url: URL
+    public let caption: String?
+    public private(set) var item: AVPlayerItem
+    public let player: AVPlayer
     
-    private var isGrayscale: Bool
+    #if !os(visionOS)
+    @available(iOS, obsoleted: 16.0, message: "Use AVPlayer.defaultRate")
+    @Box private var playbackSpeed: Float = 1
+    #endif
     
     private var presentationSizeObservation: NSKeyValueObservation?
     private var statusObservation: NSKeyValueObservation?
     private var rateObservation: NSKeyValueObservation?
-    private var isFirstAppearance = true
     private var hideControlsWorkItem: DispatchWorkItem?
-    private var audioSessionToken: AudioSessionCoordinator.Token?
+    private var isShowingError = false
     
-    init(url: URL, caption: String?) {
+    public init(url: URL, caption: String?) {
         self.url = url
         self.caption = caption
         
-        self.isGrayscale = Preferences.shared.grayscaleImages
-        
         let asset = AVAsset(url: url)
-        self.item = VideoGalleryContentViewController.createItem(asset: asset)
+        self.item = Self.createItem(asset: asset)
         self.player = AVPlayer(playerItem: item)
         
         super.init(nibName: nil, bundle: nil)
     }
     
-    required init?(coder: NSCoder) {
+    public required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
-    private static func createItem(asset: AVAsset) -> AVPlayerItem {
-        let item = AVPlayerItem(asset: asset)
-        if Preferences.shared.grayscaleImages {
-            #if os(visionOS)
-            #warning("Use async AVVideoComposition CIFilter initializer")
-            #else
-            let filter = CIFilter(name: "CIColorMonochrome")!
-            filter.setValue(CIColor(red: 0.85, green: 0.85, blue: 0.85), forKey: "inputColor")
-            filter.setValue(1.0, forKey: "inputIntensity")
-
-            item.videoComposition = AVVideoComposition(asset: asset, applyingCIFiltersWithHandler: { request in
-                filter.setValue(request.sourceImage, forKey: "inputImage")
-                request.finish(with: filter.outputImage!, context: nil)
-            })
-            #endif
-        }
-        return item
+    open class func createItem(asset: AVAsset) -> AVPlayerItem {
+        return AVPlayerItem(asset: asset)
     }
     
-    override func viewDidLoad() {
+    public func replaceCurrentItem(with item: AVPlayerItem) {
+        self.item = item
+        player.replaceCurrentItem(with: item)
+        updateItemObservations()
+    }
+    
+    public override func viewDidLoad() {
         super.viewDidLoad()
         
         container?.setGalleryContentLoading(true)
@@ -87,19 +77,17 @@ class VideoGalleryContentViewController: UIViewController, GalleryContentViewCon
                 scheduleControlsHide()
             }
         })
-        
-        NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
     }
     
     private func updateItemObservations() {
         presentationSizeObservation = item.observe(\.presentationSize, changeHandler: { [unowned self] item, _ in
-            MainActor.runUnsafely {
+            MainActor.assumeIsolated {
                 self.preferredContentSize = item.presentationSize
                 self.container?.galleryContentChanged()
             }
         })
         statusObservation = item.observe(\.status, changeHandler: { [unowned self] item, _ in
-            MainActor.runUnsafely {
+            MainActor.assumeIsolated {
                 if item.status == .readyToPlay {
                     self.container?.setGalleryContentLoading(false)
                     self.statusObservation = nil
@@ -108,19 +96,22 @@ class VideoGalleryContentViewController: UIViewController, GalleryContentViewCon
                     self.container?.setGalleryContentLoading(false)
                     self.showErrorView(error)
                     self.statusObservation = nil
+                    self.overlayVC.setVisible(false)
                 }
             }
         })
     }
     
     private func showErrorView(_ error: any Error) {
+        isShowingError = true
+        
         let image = UIImageView(image: UIImage(systemName: "exclamationmark.triangle.fill")!)
         image.tintColor = .secondaryLabel
         image.contentMode = .scaleAspectFit
         
         let label = UILabel()
         label.text = "Error Loading"
-        label.font = .preferredFont(forTextStyle: .title1).withTraits(.traitBold)!
+        label.font = UIFont(descriptor: .preferredFontDescriptor(withTextStyle: .title1).withSymbolicTraits(.traitBold)!, size: 0)
         label.textColor = .secondaryLabel
         label.adjustsFontForContentSizeCategory = true
         
@@ -148,22 +139,9 @@ class VideoGalleryContentViewController: UIViewController, GalleryContentViewCon
         ])
     }
     
-    @objc private func preferencesChanged() {
-        if isGrayscale != Preferences.shared.grayscaleImages {
-            let isPlaying = player.rate > 0
-            isGrayscale = Preferences.shared.grayscaleImages
-            item = VideoGalleryContentViewController.createItem(asset: item.asset)
-            player.replaceCurrentItem(with: item)
-            updateItemObservations()
-            if isPlaying {
-                player.play()
-            }
-        }
-    }
-    
     private func scheduleControlsHide() {
         hideControlsWorkItem = DispatchWorkItem { [weak self] in
-            MainActor.runUnsafely {
+            MainActor.assumeIsolated {
                 guard let self,
                       let container = self.container,
                       container.galleryControlsVisible else {
@@ -177,25 +155,40 @@ class VideoGalleryContentViewController: UIViewController, GalleryContentViewCon
     
     // MARK: GalleryContentViewController
     
-    weak var container: (any GalleryVC.GalleryContentViewControllerContainer)?
+    public weak var container: (any GalleryVC.GalleryContentViewControllerContainer)?
     
-    var contentSize: CGSize {
+    public var contentSize: CGSize {
         item.presentationSize
     }
     
-    var activityItemsForSharing: [Any] {
-        [VideoActivityItemSource(asset: item.asset, url: url)]
+    open var activityItemsForSharing: [Any] {
+//        [VideoActivityItemSource(asset: item.asset, url: url)]
+        []
     }
     
+    public var presentationAnimation: GalleryContentPresentationAnimation {
+        isShowingError ? .fade : .fromSourceViewWithoutSnapshot
+    }
+    
+    #if os(visionOS)
     private lazy var overlayVC = VideoOverlayViewController(player: player)
-    var contentOverlayAccessoryViewController: UIViewController? {
+    #else
+    private lazy var overlayVC = VideoOverlayViewController(player: player, playbackSpeed: _playbackSpeed)
+    #endif
+    public var contentOverlayAccessoryViewController: UIViewController? {
         overlayVC
     }
     
-    private(set) lazy var bottomControlsAccessoryViewController: UIViewController? = VideoControlsViewController(player: player)
+    #if os(visionOS)
+    public private(set) lazy var bottomControlsAccessoryViewController: UIViewController? = VideoControlsViewController(player: player)
+    #else
+    public private(set) lazy var bottomControlsAccessoryViewController: UIViewController? = VideoControlsViewController(player: player, playbackSpeed: _playbackSpeed)
+    #endif
     
-    func setControlsVisible(_ visible: Bool, animated: Bool, dueToUserInteraction: Bool) {
-        overlayVC.setVisible(visible)
+    public func setControlsVisible(_ visible: Bool, animated: Bool, dueToUserInteraction: Bool) {
+        if !isShowingError {
+            overlayVC.setVisible(visible)
+        }
         
         if !visible {
             hideControlsWorkItem?.cancel()
@@ -205,25 +198,11 @@ class VideoGalleryContentViewController: UIViewController, GalleryContentViewCon
         }
     }
     
-    func galleryContentDidAppear() {
-        let wasFirstAppearance = isFirstAppearance
-        isFirstAppearance = false
-        
-        audioSessionToken = AudioSessionCoordinator.shared.beginPlayback(mode: .video) {
-            if wasFirstAppearance {
-                DispatchQueue.main.async {
-                    self.player.play()
-                }
-            }
-        }
+    open func galleryContentDidAppear() {
     }
     
-    func galleryContentWillDisappear() {
+    open func galleryContentWillDisappear() {
         player.pause()
-        
-        if let audioSessionToken {
-            AudioSessionCoordinator.shared.endPlayback(token: audioSessionToken)
-        }
     }
     
 }
@@ -252,9 +231,9 @@ private class PlayerView: UIView {
         playerLayer.player = player
         playerLayer.videoGravity = .resizeAspect
         
-        presentationSizeObservation = item.observe(\.presentationSize, changeHandler: { [unowned self] _, _ in
-            MainActor.runUnsafely {
-                self.invalidateIntrinsicContentSize()
+        presentationSizeObservation = item.observe(\.presentationSize, changeHandler: { [weak self] _, _ in
+            MainActor.assumeIsolated {
+                self?.invalidateIntrinsicContentSize()
             }
         })
     }

Packages/GalleryVC/Sources/GalleryVC/Content/VideoOverlayViewController.swift

@@ -1,6 +1,6 @@
 //
 //  VideoOverlayViewController.swift
-//  Tusker
+//  GalleryVC
 //
 //  Created by Shadowfacts on 3/26/24.
 //  Copyright © 2024 Shadowfacts. All rights reserved.
@@ -15,6 +15,9 @@ class VideoOverlayViewController: UIViewController {
     private static let pauseImage = UIImage(systemName: "pause.fill")!
 
     private let player: AVPlayer
+    #if !os(visionOS)
+    @Box private var playbackSpeed: Float
+    #endif
     
     private var dimmingView: UIView!
     private var controlsStack: UIStackView!
@@ -23,10 +26,18 @@ class VideoOverlayViewController: UIViewController {
 
     private var rateObservation: NSKeyValueObservation?
     
+    #if os(visionOS)
     init(player: AVPlayer) {
         self.player = player
         super.init(nibName: nil, bundle: nil)
     }
+    #else
+    init(player: AVPlayer, playbackSpeed: Box<Float>) {
+        self.player = player
+        self._playbackSpeed = playbackSpeed
+        super.init(nibName: nil, bundle: nil)
+    }
+    #endif
 
     required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
@@ -79,7 +90,7 @@ class VideoOverlayViewController: UIViewController {
         ])
         
         rateObservation = player.observe(\.rate, changeHandler: { player, _ in
-            MainActor.runUnsafely {
+            MainActor.assumeIsolated {
                 playPauseButton.image = player.rate > 0 ? VideoOverlayViewController.pauseImage : VideoOverlayViewController.playImage
             }
         })
@@ -98,7 +109,11 @@ class VideoOverlayViewController: UIViewController {
             if player.currentTime() >= player.currentItem!.duration {
                 player.seek(to: .zero)
             }
+            #if os(visionOS)
             player.play()
+            #else
+            player.rate = playbackSpeed
+            #endif
         }
     }
     

Packages/GalleryVC/Sources/GalleryVC/GalleryContentViewController.swift

@@ -15,7 +15,7 @@ public protocol GalleryContentViewController: UIViewController {
     var caption: String? { get }
     var contentOverlayAccessoryViewController: UIViewController? { get }
     var bottomControlsAccessoryViewController: UIViewController? { get }
-    var canAnimateFromSourceView: Bool { get }
+    var presentationAnimation: GalleryContentPresentationAnimation { get }
     
     func setControlsVisible(_ visible: Bool, animated: Bool, dueToUserInteraction: Bool)
     func galleryContentDidAppear()
@@ -31,8 +31,8 @@ public extension GalleryContentViewController {
         nil
     }
     
-    var canAnimateFromSourceView: Bool {
-        true
+    var presentationAnimation: GalleryContentPresentationAnimation {
+        .fromSourceView
     }
     
     func setControlsVisible(_ visible: Bool, animated: Bool, dueToUserInteraction: Bool) {
@@ -44,3 +44,9 @@ public extension GalleryContentViewController {
     func galleryContentWillDisappear() {
     }
 }
+
+public enum GalleryContentPresentationAnimation {
+    case fade
+    case fromSourceView
+    case fromSourceViewWithoutSnapshot
+}

Packages/GalleryVC/Sources/GalleryVC/GalleryDismissAnimationController.swift

@@ -30,12 +30,37 @@ class GalleryDismissAnimationController: NSObject, UIViewControllerAnimatedTrans
         
         let itemViewController = from.currentItemViewController
         
-        if !itemViewController.content.canAnimateFromSourceView || (UIAccessibility.prefersCrossFadeTransitions && interactiveVelocity == nil) {
+        if itemViewController.content.presentationAnimation == .fade || (UIAccessibility.prefersCrossFadeTransitions && interactiveVelocity == nil) {
             animateCrossFadeTransition(using: transitionContext)
             return
         }
         
         let container = transitionContext.containerView
+
+        // Moving `to.view` to the container is necessary when the presenting VC (i.e., `to`)
+        // is in the window's root presentation.
+        // But it breaks when the gallery is presented from a sheet-presented VC--in which case
+        // `to.view` is already in the view hierarchy at this point; and adding it to the
+        // container causees it to be removed when the transition completes.
+        if to.view.superview == nil {
+            to.view.frame = container.bounds
+            container.addSubview(to.view)
+        }
+        
+        let sourceSnapshot: UIView? = if itemViewController.content.presentationAnimation == .fromSourceViewWithoutSnapshot {
+            nil
+        } else {
+            sourceView.snapshotView(afterScreenUpdates: false)
+        }
+        if let sourceSnapshot {
+            let snapshotContainer = sourceView.ancestorForInsertingSnapshot
+            snapshotContainer.addSubview(sourceSnapshot)
+            let sourceFrameInShapshotContainer = snapshotContainer.convert(sourceView.bounds, from: sourceView)
+            sourceSnapshot.frame = sourceFrameInShapshotContainer
+            sourceSnapshot.layer.opacity = 1
+            self.sourceView.layer.opacity = 0
+        }
+
         let sourceFrameInContainer = container.convert(sourceView.bounds, from: sourceView)
         let destFrameInContainer = container.convert(itemViewController.content.view.bounds, from: itemViewController.content.view)
         
@@ -48,38 +73,39 @@ class GalleryDismissAnimationController: NSObject, UIViewControllerAnimatedTrans
                 .translatedBy(x: destFrameInContainer.midX - sourceFrameInContainer.midX, y: destFrameInContainer.midY - sourceFrameInContainer.midY)
                 .scaledBy(x: scale, y: scale)
             sourceView.transform = sourceToDestTransform
+            sourceSnapshot?.transform = sourceToDestTransform
         } else {
             appliedSourceToDestTransform = false
         }
         
-        // Moving `to.view` to the container is necessary when the presenting VC (i.e., `to`)
-        // is in the window's root presentation.
-        // But it breaks when the gallery is presented from a sheet-presented VC--in which case
-        // `to.view` is already in the view hierarchy at this point; and adding it to the
-        // container causees it to be removed when the transition completes.
-        if to.view.superview == nil {
-            to.view.frame = container.bounds
-            container.addSubview(to.view)
-        }
-        
         from.view.frame = container.bounds
         container.addSubview(from.view)
-
+        
+        let contentContainer = UIView()
+        contentContainer.layer.masksToBounds = true
+        contentContainer.frame = destFrameInContainer
+        container.addSubview(contentContainer)
+        
         let content = itemViewController.takeContent()
         content.view.translatesAutoresizingMaskIntoConstraints = true
-        content.view.layer.masksToBounds = true
-        container.addSubview(content.view)
-        
-        content.view.frame = destFrameInContainer
+        content.view.transform = .identity
         content.view.layer.opacity = 1
-        
+        content.view.frame = contentContainer.bounds
+        contentContainer.addSubview(content.view)
+
         container.layoutIfNeeded()
         
+        // Hide overlaid controls immediately, to prevent the Live Text button's position
+        // getting caught up in the rest of the animation.
+        UIView.animate(withDuration: 0.1) {
+            content.setControlsVisible(false, animated: false, dueToUserInteraction: false)
+        }
+        
         let duration = self.transitionDuration(using: transitionContext)
         var initialVelocity: CGVector
         if let interactiveVelocity,
            let interactiveTranslation,
-           // very short/fast flicks don't transfer their velocity, since it makes size change animation look wacky due to the springs initial undershoot
+           // very short/fast flicks don't transfer their velocity, since it makes size change animation look wacky due to the spring's initial undershoot
            sqrt(pow(interactiveTranslation.x, 2) + pow(interactiveTranslation.y, 2)) > 100,
            sqrt(pow(interactiveVelocity.x, 2) + pow(interactiveVelocity.y, 2)) < 2000 {
             let xDistance = sourceFrameInContainer.midX - destFrameInContainer.midX
@@ -102,14 +128,34 @@ class GalleryDismissAnimationController: NSObject, UIViewControllerAnimatedTrans
             
             if appliedSourceToDestTransform {
                 self.sourceView.transform = origSourceTransform
+                sourceSnapshot?.transform = origSourceTransform
             }
-            content.view.frame = sourceFrameInContainer
-            content.view.layer.opacity = 0
+            
+            contentContainer.frame = sourceFrameInContainer
+            // Using sourceSizeWithDestAspectRatioCenteredInContentContainer does not seem to be necessary here.
+            // I guess autoresizing takes care of it?
             
             itemViewController.setControlsVisible(false, animated: false, dueToUserInteraction: false)
         }
         
+        // Delay fading out the content because if it's still big while it's semi-transparent,
+        // seeing the stuff behind it looks odd.
+        animator.addAnimations({
+            content.view.layer.opacity = 0
+        }, delayFactor: 0.35)
+        
+        if let sourceSnapshot {
+            animator.addAnimations({
+                self.sourceView.layer.opacity = 1
+                sourceSnapshot.layer.opacity = 0
+            }, delayFactor: 0.5)
+        }
+        
         animator.addCompletion { _ in
+            sourceSnapshot?.removeFromSuperview()
+            
+            // Having dismissed, we don't need to undo any of the changes to the content VC.
+            
             transitionContext.completeTransition(true)
         }
         

Packages/GalleryVC/Sources/GalleryVC/GalleryDismissInteraction.swift

@@ -20,6 +20,8 @@ class GalleryDismissInteraction: NSObject {
     private(set) var dismissVelocity: CGPoint?
     private(set) var dismissTranslation: CGPoint?
     
+    private var cancelAnimator: UIViewPropertyAnimator?
+    
     init(viewController: GalleryViewController) {
         self.viewController = viewController
         super.init()
@@ -38,6 +40,8 @@ class GalleryDismissInteraction: NSObject {
             content = viewController.currentItemViewController.takeContent()
             content!.view.translatesAutoresizingMaskIntoConstraints = true
             content!.view.frame = origContentFrameInGallery!
+            // Make sure the context remains behind the controls
+            content!.view.layer.zPosition = -1000
             viewController.view.addSubview(content!.view)
             
             origControlsVisible = viewController.currentItemViewController.controlsVisible
@@ -53,12 +57,42 @@ class GalleryDismissInteraction: NSObject {
             let translation = recognizer.translation(in: viewController.view)
             let velocity = recognizer.velocity(in: viewController.view)
             
-            dismissVelocity = velocity
-            dismissTranslation = translation
-            viewController.dismiss(animated: true)
+            let translationMagnitude = sqrt(translation.x.magnitudeSquared + translation.y.magnitudeSquared)
+            let velocityMagnitude = sqrt(velocity.x.magnitudeSquared + velocity.y.magnitudeSquared)
+            
+            if translationMagnitude < 150 && velocityMagnitude < 500 {
+                isActive = false
+                
+                cancelAnimator?.stopAnimation(true)
+                
+                let spring = UISpringTimingParameters(mass: 1, stiffness: 439, damping: 42, initialVelocity: .zero)
+                cancelAnimator = UIViewPropertyAnimator(duration: 0.2, timingParameters: spring)
+                cancelAnimator!.addAnimations {
+                    self.content!.view.frame = self.origContentFrameInGallery!
+                    self.viewController.currentItemViewController.setControlsVisible(self.origControlsVisible!, animated: false, dueToUserInteraction: false)
+                }
+                cancelAnimator!.addCompletion { _ in
+                    guard !self.isActive else {
+                        // bail in case the animation finishing raced with the user's interaction
+                        return
+                    }
+                    self.content!.view.layer.zPosition = 0
+                    self.content!.view.removeFromSuperview()
+                    self.viewController.currentItemViewController.addContent()
+                    self.content = nil
+                    self.origContentFrameInGallery = nil
+                    self.origControlsVisible = nil
+                }
+                cancelAnimator!.startAnimation()
 
-            // don't unset this until after dismiss is called, so that the dismiss animation controller can read it
-            isActive = false
+            } else {
+                dismissVelocity = velocity
+                dismissTranslation = translation
+                viewController.dismiss(animated: true)
+                
+                // don't unset this until after dismiss is called, so that the dismiss animation controller can read it
+                isActive = false
+            }
             
         default:
             break

Packages/GalleryVC/Sources/GalleryVC/GalleryItemViewController.swift

@@ -11,6 +11,7 @@ import AVFoundation
 @MainActor
 protocol GalleryItemViewControllerDelegate: AnyObject {
     func isGalleryBeingPresented() -> Bool
+    func isGalleryBeingDismissed() -> Bool
     func addPresentationAnimationCompletion(_ block: @escaping () -> Void)
     func galleryItemClose(_ item: GalleryItemViewController)
     func galleryItemApplicationActivities(_ item: GalleryItemViewController) -> [UIActivity]?
@@ -69,6 +70,10 @@ class GalleryItemViewController: UIViewController {
         scrollView = UIScrollView()
         scrollView.translatesAutoresizingMaskIntoConstraints = false
         scrollView.delegate = self
+        // We calculate zoom/position ignoring the safe area, so content insets need to not incorporate it either.
+        // Otherwise, content that fills the screen (extending into the safe area) may still end up scrollable
+        // (this is readily observable with tall images on a landscape iPad).
+        scrollView.contentInsetAdjustmentBehavior = .never
         
         view.addSubview(scrollView)
         
@@ -372,13 +377,27 @@ class GalleryItemViewController: UIViewController {
     }
     
     private func updateTopControlsInsets() {
+        guard delegate?.isGalleryBeingDismissed() != true else {
+            return
+        }
         let notchedDeviceTopInsets: [CGFloat] = [
             44, // iPhone X, Xs, Xs Max, 11 Pro, 11 Pro Max
             48, // iPhone XR, 11
             47, // iPhone 12, 12 Pro, 12 Pro Max, 13, 13 Pro, 13 Pro Max, 14, 14 Plus
             50, // iPhone 12 mini, 13 mini
         ]
-        if notchedDeviceTopInsets.contains(view.safeAreaInsets.top) {
+        let topInset: CGFloat
+        switch view.window?.windowScene?.interfaceOrientation {
+        case .portraitUpsideDown:
+            topInset = view.safeAreaInsets.bottom
+        case .landscapeLeft:
+            topInset = view.safeAreaInsets.right
+        case .landscapeRight:
+            topInset = view.safeAreaInsets.left
+        default:
+            topInset = view.safeAreaInsets.top
+        }
+        if notchedDeviceTopInsets.contains(topInset) {
             // the notch width is not the same for the iPhones 13,
             // but what we actually want is the same offset from the edges
             // since the corner radius didn't change
@@ -387,7 +406,7 @@ class GalleryItemViewController: UIViewController {
             let offset = (earWidth - (shareButton.imageView?.bounds.width ?? 0)) / 2
             shareButtonLeadingConstraint.constant = offset
             closeButtonTrailingConstraint.constant = offset
-        } else if view.safeAreaInsets.top == 0 {
+        } else if topInset == 0 {
             // square corner devices
             shareButtonLeadingConstraint.constant = 8
             shareButtonTopConstraint.constant = 8

Packages/GalleryVC/Sources/GalleryVC/GalleryPresentationAnimationController.swift

@@ -25,11 +25,31 @@ class GalleryPresentationAnimationController: NSObject, UIViewControllerAnimated
         
         let itemViewController = to.currentItemViewController
 
-        if !itemViewController.content.canAnimateFromSourceView || UIAccessibility.prefersCrossFadeTransitions {
+        if itemViewController.content.presentationAnimation == .fade || UIAccessibility.prefersCrossFadeTransitions {
             animateCrossFadeTransition(using: transitionContext)
             return
         }
         
+        // Try to effectively "fade out" anything that's on top of the source view.
+        // The 0.1 duration makes this happen faster than the rest of the animation,
+        // and so less noticeable.
+        let sourceSnapshot: UIView? = if itemViewController.content.presentationAnimation == .fromSourceViewWithoutSnapshot {
+            nil
+        } else {
+            sourceView.snapshotView(afterScreenUpdates: false)
+        }
+        if let sourceSnapshot {
+            let snapshotContainer = sourceView.ancestorForInsertingSnapshot
+            snapshotContainer.addSubview(sourceSnapshot)
+            let sourceFrameInShapshotContainer = snapshotContainer.convert(sourceView.bounds, from: sourceView)
+            sourceSnapshot.frame = sourceFrameInShapshotContainer
+            sourceSnapshot.transform = sourceView.transform
+            sourceSnapshot.layer.opacity = 0
+            UIView.animate(withDuration: 0.1) {
+                sourceSnapshot.layer.opacity = 1
+            }
+        }
+        
         let container = transitionContext.containerView
         to.view.frame = container.bounds
         container.addSubview(to.view)
@@ -56,21 +76,70 @@ class GalleryPresentationAnimationController: NSObject, UIViewControllerAnimated
             sourceToDestTransform = nil
         }
         
+        // Grab these before taking the content out and changing the transform.
+        let origContentTransform = itemViewController.content.view.transform
+        let origContentFrame = itemViewController.content.view.frame
+        
+        // The content container provides the clipping for the content view,
+        // which, in case the source/dest aspect ratios don't match, makes
+        // it look like the content is expanding out from the source rect.
+        let contentContainer = UIView()
+        contentContainer.layer.masksToBounds = true
+        container.insertSubview(contentContainer, belowSubview: to.view)
         let content = itemViewController.takeContent()
         content.view.translatesAutoresizingMaskIntoConstraints = true
-        container.insertSubview(content.view, belowSubview: to.view)
+        content.view.transform = .identity
+        // The fade-in makes the aspect ratio handling look a little bit worse,
+        // but papers over the z-index change and potential corner radius change.
+        content.view.layer.opacity = 0
+        contentContainer.addSubview(content.view)
 
         // Use a separate dimming view from to.view, so that the gallery controls can be in front of the moving content.
         let dimmingView = UIView()
         dimmingView.backgroundColor = .black
         dimmingView.frame = container.bounds
         dimmingView.layer.opacity = 0
-        container.insertSubview(dimmingView, belowSubview: content.view)
+        container.insertSubview(dimmingView, belowSubview: contentContainer)
 
         to.view.backgroundColor = nil
         to.view.layer.opacity = 0
-        content.view.frame = sourceFrameInContainer
-        content.view.layer.opacity = 0
+        
+        contentContainer.frame = sourceFrameInContainer
+        
+        let sourceAspectRatio: CGFloat = if sourceFrameInContainer.height > 0 {
+            sourceFrameInContainer.width / sourceFrameInContainer.height
+        } else {
+            0
+        }
+        let destAspectRatio: CGFloat = if destFrameInContainer.height > 0 {
+            destFrameInContainer.width / destFrameInContainer.height
+        } else {
+            0
+        }
+        let sourceSizeWithDestAspectRatioCenteredInContentContainer: CGRect
+        if 0.001 < abs(sourceAspectRatio - destAspectRatio) {
+            // asepct ratios are effectively equal
+            sourceSizeWithDestAspectRatioCenteredInContentContainer = CGRect(origin: .zero, size: sourceFrameInContainer.size)
+        } else if sourceAspectRatio < destAspectRatio {
+            // source aspect ratio is narrow/taller than dest
+            let width = sourceFrameInContainer.height * destAspectRatio
+            sourceSizeWithDestAspectRatioCenteredInContentContainer = CGRect(
+                x: -(width - sourceFrameInContainer.width) / 2,
+                y: 0,
+                width: width,
+                height: sourceFrameInContainer.height
+            )
+        } else {
+            // source aspect ratio is wider/shorter than dest
+            let height = sourceFrameInContainer.width / destAspectRatio
+            sourceSizeWithDestAspectRatioCenteredInContentContainer = CGRect(
+                x: 0,
+                y: -(height - sourceFrameInContainer.height) / 2,
+                width: sourceFrameInContainer.width,
+                height: height
+            )
+        }
+        content.view.frame = sourceSizeWithDestAspectRatioCenteredInContentContainer
         
         container.layoutIfNeeded()
         
@@ -78,8 +147,14 @@ class GalleryPresentationAnimationController: NSObject, UIViewControllerAnimated
         itemViewController.setControlsVisible(false, animated: false, dueToUserInteraction: false)
 
         let duration = self.transitionDuration(using: transitionContext)
-        // rougly equivalent to duration: 0.35, bounce: 0.3
-        let spring = UISpringTimingParameters(mass: 1, stiffness: 322, damping: 25, initialVelocity: .zero)
+        // less bounce on bigger screens
+        let spring = if UIDevice.current.userInterfaceIdiom == .pad {
+            // roughly equivalent to duration: 0.35, bounce: 0.2
+            UISpringTimingParameters(mass: 1, stiffness: 322, damping: 28, initialVelocity: .zero)
+        } else {
+            // roughly equivalent to duration: 0.35, bounce: 0.3
+            UISpringTimingParameters(mass: 1, stiffness: 322, damping: 25, initialVelocity: .zero)
+        }
         let animator = UIViewPropertyAnimator(duration: duration, timingParameters: spring)
         
         animator.addAnimations {
@@ -87,25 +162,35 @@ class GalleryPresentationAnimationController: NSObject, UIViewControllerAnimated
             
             to.view.layer.opacity = 1
             
-            content.view.frame = destFrameInContainer
+            contentContainer.frame = destFrameInContainer
+            content.view.frame = contentContainer.bounds
             content.view.layer.opacity = 1
-            
+
             itemViewController.setControlsVisible(true, animated: false, dueToUserInteraction: false)
 
             if let sourceToDestTransform {
+                sourceSnapshot?.transform = sourceToDestTransform
                 self.sourceView.transform = sourceToDestTransform
             }
         }
         
         animator.addCompletion { _ in
+            sourceSnapshot?.removeFromSuperview()
+            self.sourceView.layer.opacity = 1
+            if sourceToDestTransform != nil {
+                self.sourceView.transform = origSourceTransform
+            }
+
+            contentContainer.removeFromSuperview()
             dimmingView.removeFromSuperview()
             
             to.view.backgroundColor = .black
             
-            if sourceToDestTransform != nil {
-                self.sourceView.transform = origSourceTransform
-            }
-            
+            // Reset the properties we changed before re-adding the content to the scroll view.
+            // (I would expect UIScrollView to effectively do this itself, but w/e.)
+            content.view.transform = origContentTransform
+            content.view.frame = origContentFrame
+
             itemViewController.addContent()
             
             transitionContext.completeTransition(true)

Packages/GalleryVC/Sources/GalleryVC/GalleryViewController.swift

@@ -139,6 +139,10 @@ extension GalleryViewController: GalleryItemViewControllerDelegate {
         isBeingPresented
     }
     
+    func isGalleryBeingDismissed() -> Bool {
+        isBeingDismissed
+    }
+    
     func addPresentationAnimationCompletion(_ block: @escaping () -> Void) {
         presentationAnimationCompletionHandlers.append(block)
     }

Packages/GalleryVC/Sources/GalleryVC/UIView+Utilities.swift

@@ -0,0 +1,26 @@
+//
+//  UIView+Utilities.swift
+//  GalleryVC
+//
+//  Created by Shadowfacts on 11/24/24.
+//
+
+import UIKit
+
+extension UIView {
+    
+    var ancestorForInsertingSnapshot: UIView {
+        var view = self
+        while let superview = view.superview {
+            if superview.layer.masksToBounds {
+                return superview
+            } else if superview is UIScrollView {
+                return self
+            } else {
+                view = superview
+            }
+        }
+        return view
+    }
+    
+}

Packages/InstanceFeatures/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "InstanceFeatures",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.

Packages/MatchedGeometryPresentation/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "MatchedGeometryPresentation",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, making them visible to other packages.

Packages/Pachyderm/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "Pachyderm",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.

Packages/Pachyderm/Sources/Pachyderm/Client.swift

@@ -25,27 +25,30 @@ public struct Client: Sendable {
     
     public var timeoutInterval: TimeInterval = 60
     
-    static let decoder: JSONDecoder = {
-        let decoder = JSONDecoder()
-        
+    private static let dateFormatter: DateFormatter = {
         let formatter = DateFormatter()
         formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SZ"
         formatter.timeZone = TimeZone(abbreviation: "UTC")
         formatter.locale = Locale(identifier: "en_US_POSIX")
-        let iso8601 = ISO8601DateFormatter()
+        return formatter
+    }()
+    private static let iso8601Formatter = ISO8601DateFormatter()
+    private static func decodeDate(string: String) -> Date? {
+        // for the next time mastodon accidentally changes date formats >.>
+        return dateFormatter.date(from: string) ?? iso8601Formatter.date(from: string)
+    }
+    
+    static let decoder: JSONDecoder = {
+        let decoder = JSONDecoder()
         decoder.dateDecodingStrategy = .custom({ (decoder) in
             let container = try decoder.singleValueContainer()
             let str = try container.decode(String.self)
-            // for the next time mastodon accidentally changes date formats >.>
-            if let date = formatter.date(from: str) {
-                return date
-            } else if let date = iso8601.date(from: str) {
+            if let date = Self.decodeDate(string: str) {
                 return date
             } else {
                 throw DecodingError.typeMismatch(Date.self, .init(codingPath: container.codingPath, debugDescription: "unexpected date format: \(str)"))
             }
         })
-        
         return decoder
     }()
     
@@ -105,6 +108,15 @@ public struct Client: Sendable {
         return task
     }
     
+    private func error(from response: HTTPURLResponse) -> ErrorType {
+        if response.statusCode == 429,
+           let date = response.value(forHTTPHeaderField: "X-RateLimit-Reset").flatMap(Self.decodeDate) {
+            return .rateLimited(date)
+        } else {
+            return .unexpectedStatus(response.statusCode)
+        }
+    }
+    
     @discardableResult
     public func run<Result: Sendable>(_ request: Request<Result>) async throws -> (Result, Pagination?) {
         return try await withCheckedThrowingContinuation { continuation in
@@ -575,6 +587,8 @@ extension Client {
                 return "Invalid Model"
             case .mastodonError(let code, let error):
                 return "Server Error (\(code)): \(error)"
+            case .rateLimited(let reset):
+                return "Rate Limited Until \(reset.formatted(date: .omitted, time: .standard))"
             }
         }
     }
@@ -585,6 +599,7 @@ extension Client {
         case invalidResponse
         case invalidModel(Swift.Error)
         case mastodonError(Int, String)
+        case rateLimited(Date)
     }
     
     enum NodeInfoError: LocalizedError {

Packages/Pachyderm/Sources/Pachyderm/Model/Emoji.swift

@@ -22,7 +22,12 @@ public struct Emoji: Codable, Sendable {
         let container = try decoder.container(keyedBy: CodingKeys.self)
         
         self.shortcode = try container.decode(String.self, forKey: .shortcode)
-        self.url = try container.decode(WebURL.self, forKey: .url)
+        do {
+            self.url = try container.decode(WebURL.self, forKey: .url)
+        } catch {
+            let s = try? container.decode(String.self, forKey: .url)
+            throw DecodingError.dataCorrupted(.init(codingPath: container.codingPath + [CodingKeys.url], debugDescription: "Could not decode URL '\(s ?? "<failed to decode string>")'", underlyingError: error))
+        }
         self.staticURL = try container.decode(WebURL.self, forKey: .staticURL)
         self.visibleInPicker = try container.decode(Bool.self, forKey: .visibleInPicker)
         self.category = try container.decodeIfPresent(String.self, forKey: .category)

Packages/Pachyderm/Sources/Pachyderm/Model/NodeInfo.swift

@@ -11,9 +11,15 @@ import Foundation
 public struct NodeInfo: Decodable, Sendable, Equatable {
     public let version: String
     public let software: Software
+    public let metadata: Metadata
     
     public struct Software: Decodable, Sendable, Equatable {
         public let name: String
         public let version: String
     }
+    
+    public struct Metadata: Decodable, Sendable, Equatable {
+        public let nodeName: String
+        public let nodeDescription: String
+    }
 }

Packages/Pachyderm/Tests/PachydermTests/NotificationGroupTests.swift

@@ -197,72 +197,72 @@ class NotificationGroupTests: XCTestCase {
 
     func testGroupSimple() {
         let groups = NotificationGroup.createGroups(notifications: [likeA1, likeA2], only: [.favourite])
-        XCTAssertEqual(groups, [NotificationGroup(notifications: [likeA1, likeA2])!])
+        XCTAssertEqual(groups, [NotificationGroup(notifications: [likeA1, likeA2], kind: .favourite)!])
     }
     
     func testGroupWithOtherGroupableInBetween() {
         let groups = NotificationGroup.createGroups(notifications: [likeA1, likeB, likeA2], only: [.favourite])
         XCTAssertEqual(groups, [
-            NotificationGroup(notifications: [likeA1, likeA2])!,
-            NotificationGroup(notifications: [likeB])!,
+            NotificationGroup(notifications: [likeA1, likeA2], kind: .favourite)!,
+            NotificationGroup(notifications: [likeB], kind: .favourite)!,
         ])
     }
     
     func testDontGroupWithUngroupableInBetween() {
         let groups = NotificationGroup.createGroups(notifications: [likeA1, mentionB, likeA2], only: [.favourite])
         XCTAssertEqual(groups, [
-            NotificationGroup(notifications: [likeA1])!,
-            NotificationGroup(notifications: [mentionB])!,
-            NotificationGroup(notifications: [likeA2])!,
+            NotificationGroup(notifications: [likeA1], kind: .favourite)!,
+            NotificationGroup(notifications: [mentionB], kind: .mention)!,
+            NotificationGroup(notifications: [likeA2], kind: .favourite)!,
         ])
     }
 
     func testMergeSimpleGroups() {
-        let group1 = NotificationGroup(notifications: [likeA1])!
-        let group2 = NotificationGroup(notifications: [likeA2])!
+        let group1 = NotificationGroup(notifications: [likeA1], kind: .favourite)!
+        let group2 = NotificationGroup(notifications: [likeA2], kind: .favourite)!
         let merged = NotificationGroup.mergeGroups(first: [group1], second: [group2], only: [.favourite])
         XCTAssertEqual(merged, [
-            NotificationGroup(notifications: [likeA1, likeA2])!
+            NotificationGroup(notifications: [likeA1, likeA2], kind: .favourite)!
         ])
     }
     
     func testMergeGroupsWithOtherGroupableInBetween() {
-        let group1 = NotificationGroup(notifications: [likeA1])!
-        let group2 = NotificationGroup(notifications: [likeB])!
-        let group3 = NotificationGroup(notifications: [likeA2])!
+        let group1 = NotificationGroup(notifications: [likeA1], kind: .favourite)!
+        let group2 = NotificationGroup(notifications: [likeB], kind: .favourite)!
+        let group3 = NotificationGroup(notifications: [likeA2], kind: .favourite)!
         let merged = NotificationGroup.mergeGroups(first: [group1, group2], second: [group3], only: [.favourite])
         XCTAssertEqual(merged, [
-            NotificationGroup(notifications: [likeA1, likeA2])!,
-            NotificationGroup(notifications: [likeB])!,
+            NotificationGroup(notifications: [likeA1, likeA2], kind: .favourite)!,
+            NotificationGroup(notifications: [likeB], kind: .favourite)!,
         ])
         
         let merged2 = NotificationGroup.mergeGroups(first: [group1], second: [group2, group3], only: [.favourite])
         XCTAssertEqual(merged2, [
-            NotificationGroup(notifications: [likeA1, likeA2])!,
-            NotificationGroup(notifications: [likeB])!,
+            NotificationGroup(notifications: [likeA1, likeA2], kind: .favourite)!,
+            NotificationGroup(notifications: [likeB], kind: .favourite)!,
         ])
         
-        let group4 = NotificationGroup(notifications: [likeB2])!
-        let group5 = NotificationGroup(notifications: [mentionB])!
+        let group4 = NotificationGroup(notifications: [likeB2], kind: .favourite)!
+        let group5 = NotificationGroup(notifications: [mentionB], kind: .mention)!
         let merged3 = NotificationGroup.mergeGroups(first: [group1, group5, group2], second: [group4, group3], only: [.favourite])
         print(merged3.count)
         XCTAssertEqual(merged3, [
             group1,
             group5,
-            NotificationGroup(notifications: [likeB, likeB2]),
+            NotificationGroup(notifications: [likeB, likeB2], kind: .favourite),
             group3
         ])
     }
     
     func testDontMergeWithUngroupableInBetween() {
-        let group1 = NotificationGroup(notifications: [likeA1])!
-        let group2 = NotificationGroup(notifications: [mentionB])!
-        let group3 = NotificationGroup(notifications: [likeA2])!
+        let group1 = NotificationGroup(notifications: [likeA1], kind: .favourite)!
+        let group2 = NotificationGroup(notifications: [mentionB], kind: .mention)!
+        let group3 = NotificationGroup(notifications: [likeA2], kind: .favourite)!
         let merged = NotificationGroup.mergeGroups(first: [group1, group2], second: [group3], only: [.favourite])
         XCTAssertEqual(merged, [
-            NotificationGroup(notifications: [likeA1])!,
-            NotificationGroup(notifications: [mentionB])!,
-            NotificationGroup(notifications: [likeA2])!,
+            NotificationGroup(notifications: [likeA1], kind: .favourite)!,
+            NotificationGroup(notifications: [mentionB], kind: .mention)!,
+            NotificationGroup(notifications: [likeA2], kind: .favourite)!,
         ])
     }
 

Packages/PushNotifications/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "PushNotifications",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, making them visible to other packages.

Packages/TTTKit/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "TTTKit",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.

Packages/TuskerComponents/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "TuskerComponents",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.

Packages/TuskerComponents/Sources/TuskerComponents/AsyncPicker.swift

@@ -9,14 +9,21 @@ import SwiftUI
 
 public struct AsyncPicker<V: Hashable, Content: View>: View {
     let titleKey: LocalizedStringKey
+    #if !os(visionOS)
+    @available(iOS, obsoleted: 16.0, message: "Switch to LabeledContent")
+    let labelHidden: Bool
+    #endif
     let alignment: Alignment
     @Binding var value: V
     let onChange: (V) async -> Bool
     let content: Content
     @State private var isLoading = false
     
-    public init(_ titleKey: LocalizedStringKey, alignment: Alignment = .center, value: Binding<V>, onChange: @escaping (V) async -> Bool, @ViewBuilder content: () -> Content) {
+    public init(_ titleKey: LocalizedStringKey, labelHidden: Bool = false, alignment: Alignment = .center, value: Binding<V>, onChange: @escaping (V) async -> Bool, @ViewBuilder content: () -> Content) {
         self.titleKey = titleKey
+        #if !os(visionOS)
+        self.labelHidden = labelHidden
+        #endif
         self.alignment = alignment
         self._value = value
         self.onChange = onChange
@@ -24,9 +31,25 @@ public struct AsyncPicker<V: Hashable, Content: View>: View {
     }
     
     public var body: some View {
+        #if os(visionOS)
         LabeledContent(titleKey) {
             picker
         }
+        #else
+        if #available(iOS 16.0, *) {
+            LabeledContent(titleKey) {
+                picker
+            }
+        } else if labelHidden {
+            picker
+        } else {
+            HStack {
+                Text(titleKey)
+                Spacer()
+                picker
+            }
+        }
+        #endif
     }
     
     private var picker: some View {

Packages/TuskerComponents/Sources/TuskerComponents/AsyncToggle.swift

@@ -10,19 +10,42 @@ import SwiftUI
 
 public struct AsyncToggle: View {
     let titleKey: LocalizedStringKey
+    #if !os(visionOS)
+    @available(iOS, obsoleted: 16.0, message: "Switch to LabeledContent")
+    let labelHidden: Bool
+    #endif
     @Binding var mode: Mode
     let onChange: (Bool) async -> Bool
     
-    public init(_ titleKey: LocalizedStringKey, mode: Binding<Mode>, onChange: @escaping (Bool) async -> Bool) {
+    public init(_ titleKey: LocalizedStringKey, labelHidden: Bool = false, mode: Binding<Mode>, onChange: @escaping (Bool) async -> Bool) {
         self.titleKey = titleKey
+        #if !os(visionOS)
+        self.labelHidden = labelHidden
+        #endif
         self._mode = mode
         self.onChange = onChange
     }
     
     public var body: some View {
+        #if os(visionOS)
         LabeledContent(titleKey) {
             toggleOrSpinner
         }
+        #else
+        if #available(iOS 16.0, *) {
+            LabeledContent(titleKey) {
+                toggleOrSpinner
+            }
+        } else if labelHidden {
+            toggleOrSpinner
+        } else {
+            HStack {
+                Text(titleKey)
+                Spacer()
+                toggleOrSpinner
+            }
+        }
+        #endif
     }
     
     @ViewBuilder

Packages/TuskerComponents/Sources/TuskerComponents/MenuPicker.swift

@@ -47,7 +47,9 @@ public struct MenuPicker<Value: Hashable>: UIViewRepresentable {
     
     private func makeConfiguration() -> UIButton.Configuration {
         var config = UIButton.Configuration.borderless()
-        config.indicator = .popup
+        if #available(iOS 16.0, *) {
+            config.indicator = .popup
+        }
         if buttonStyle.hasIcon {
             config.image = selectedOption.image
         }

Packages/TuskerPreferences/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "TuskerPreferences",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, making them visible to other packages.

Packages/UserAccounts/Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "UserAccounts",
     platforms: [
-        .iOS(.v16),
+        .iOS(.v15),
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.

Tusker.xcodeproj/project.pbxproj

@@ -141,6 +141,7 @@
 		D64B96812BC3279D002C8990 /* PrefsAccountView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64B96802BC3279D002C8990 /* PrefsAccountView.swift */; };
 		D64B96842BC3893C002C8990 /* PushSubscriptionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64B96832BC3893C002C8990 /* PushSubscriptionView.swift */; };
 		D64D0AB12128D9AE005A6F37 /* OnboardingViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64D0AB02128D9AE005A6F37 /* OnboardingViewController.swift */; };
+		D64D8CA92463B494006B0BAA /* MultiThreadDictionary.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64D8CA82463B494006B0BAA /* MultiThreadDictionary.swift */; };
 		D651C5B42915B00400236EF6 /* ProfileFieldsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D651C5B32915B00400236EF6 /* ProfileFieldsView.swift */; };
 		D6531DEE246B81C9000F9538 /* GifvPlayerView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6531DED246B81C9000F9538 /* GifvPlayerView.swift */; };
 		D6538945214D6D7500E3CEFC /* TableViewSwipeActionProvider.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6538944214D6D7500E3CEFC /* TableViewSwipeActionProvider.swift */; };
@@ -203,20 +204,16 @@
 		D691771729A710520054D7EF /* ProfileNoContentCollectionViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691771629A710520054D7EF /* ProfileNoContentCollectionViewCell.swift */; };
 		D691771929A7B8820054D7EF /* ProfileHeaderMovedOverlayView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691771829A7B8820054D7EF /* ProfileHeaderMovedOverlayView.swift */; };
 		D691772E29AA5D420054D7EF /* UserActivityHandlingContext.swift in Sources */ = {isa = PBXBuildFile; fileRef = D691772D29AA5D420054D7EF /* UserActivityHandlingContext.swift */; };
-		D69261232BB3AEFB0023152C /* VideoOverlayViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D69261222BB3AEFB0023152C /* VideoOverlayViewController.swift */; };
 		D69261272BB3BA610023152C /* Box.swift in Sources */ = {isa = PBXBuildFile; fileRef = D69261262BB3BA610023152C /* Box.swift */; };
 		D6934F2C2BA7AD32002B1C8D /* GalleryVC in Frameworks */ = {isa = PBXBuildFile; productRef = D6934F2B2BA7AD32002B1C8D /* GalleryVC */; };
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-		D6D9498F298EB79400C59229 /* CopyableLabel.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D9498E298EB79400C59229 /* CopyableLabel.swift */; };
+		D6D9498F298EB79400C59229 /* CopyableLable.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D9498E298EB79400C59229 /* CopyableLable.swift */; };
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@@ -571,6 +568,7 @@
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 		D64D0AB02128D9AE005A6F37 /* OnboardingViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OnboardingViewController.swift; sourceTree = "<group>"; };
+		D64D8CA82463B494006B0BAA /* MultiThreadDictionary.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MultiThreadDictionary.swift; sourceTree = "<group>"; };
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@@ -637,19 +635,15 @@
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-		D6934F312BA7E43E002B1C8D /* LoadingGalleryContentViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoadingGalleryContentViewController.swift; sourceTree = "<group>"; };
+		D6934F2F2BA7AF91002B1C8D /* GrayscalableImageGalleryContentViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GrayscalableImageGalleryContentViewController.swift; sourceTree = "<group>"; };
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-		D6934F3B2BAA0F80002B1C8D /* VideoGalleryContentViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VideoGalleryContentViewController.swift; sourceTree = "<group>"; };
+		D6934F3B2BAA0F80002B1C8D /* GrayscalableVideoGalleryContentViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GrayscalableVideoGalleryContentViewController.swift; sourceTree = "<group>"; };
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-		D6934F412BAC7D6E002B1C8D /* VideoControlsViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VideoControlsViewController.swift; sourceTree = "<group>"; };
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 		D693DE5623FE1A6A0061E07D /* EnhancedNavigationViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EnhancedNavigationViewController.swift; sourceTree = "<group>"; };
 		D693DE5823FE24300061E07D /* InteractivePushTransition.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InteractivePushTransition.swift; sourceTree = "<group>"; };
@@ -776,7 +770,7 @@
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-		D6D9498E298EB79400C59229 /* CopyableLabel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CopyableLabel.swift; sourceTree = "<group>"; };
+		D6D9498E298EB79400C59229 /* CopyableLable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CopyableLable.swift; sourceTree = "<group>"; };
 		D6DD8FFC298495A8002AD3FD /* LogoutService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LogoutService.swift; sourceTree = "<group>"; };
 		D6DD8FFE2984D327002AD3FD /* BookmarksViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BookmarksViewController.swift; sourceTree = "<group>"; };
 		D6DD996A2998611A0015C962 /* SuggestedProfilesViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SuggestedProfilesViewController.swift; sourceTree = "<group>"; };
@@ -899,13 +893,9 @@
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 				D6934F332BA8D65A002B1C8D /* ImageGalleryDataSource.swift */,
-				D6934F312BA7E43E002B1C8D /* LoadingGalleryContentViewController.swift */,
-				D6934F2F2BA7AF91002B1C8D /* ImageGalleryContentViewController.swift */,
+				D6934F2F2BA7AF91002B1C8D /* GrayscalableImageGalleryContentViewController.swift */,
 				D6934F352BA8E020002B1C8D /* GifvGalleryContentViewController.swift */,
-				D6934F3B2BAA0F80002B1C8D /* VideoGalleryContentViewController.swift */,
-				D69261222BB3AEFB0023152C /* VideoOverlayViewController.swift */,
-				D6934F412BAC7D6E002B1C8D /* VideoControlsViewController.swift */,
-				D6934F392BA8F3D7002B1C8D /* FallbackGalleryContentViewController.swift */,
+				D6934F3B2BAA0F80002B1C8D /* GrayscalableVideoGalleryContentViewController.swift */,
 			);
 			path = Gallery;
 			sourceTree = "<group>";
@@ -1488,7 +1478,7 @@
 				D6ADB6EF28ED1F25009924AB /* CachedImageView.swift */,
 				D6895DC328D65342006341DA /* ConfirmReblogStatusPreviewView.swift */,
 				D620483523D38075008A63EF /* ContentTextView.swift */,
-				D6D9498E298EB79400C59229 /* CopyableLabel.swift */,
+				D6D9498E298EB79400C59229 /* CopyableLable.swift */,
 				D6E426B225337C7000C02E1C /* CustomEmojiImageView.swift */,
 				D6969E9F240C8384002843CE /* EmojiLabel.swift */,
 				D61F75B8293C15A000C0B37F /* ZeroHeightCollectionViewCell.swift */,
@@ -1625,6 +1615,7 @@
 				D6DEBA8C2B6579830008629A /* MainThreadBox.swift */,
 				D6B81F432560390300F6E31D /* MenuController.swift */,
 				D6CF5B842AC7C56F00F15D83 /* MultiColumnCollectionViewLayout.swift */,
+				D64D8CA82463B494006B0BAA /* MultiThreadDictionary.swift */,
 				D6945C2E23AC47C3005C403C /* SavedDataManager.swift */,
 				D61F759E29385AD800C0B37F /* SemiCaseSensitiveComparator.swift */,
 				D6895DE828D962C2006341DA /* TimelineLikeController.swift */,
@@ -2122,7 +2113,6 @@
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 			buildActionMask = 2147483647;
 			files = (
-				D6934F422BAC7D6E002B1C8D /* VideoControlsViewController.swift in Sources */,
 				0427033A22B31269000D31B6 /* AdvancedPrefsView.swift in Sources */,
 				D6C3F4F5298ED0890009FCFF /* LocalPredicateStatusesViewController.swift in Sources */,
 				D691771729A710520054D7EF /* ProfileNoContentCollectionViewCell.swift in Sources */,
@@ -2169,8 +2159,7 @@
 				D6A4DCCC2553667800D9DE31 /* FastAccountSwitcherViewController.swift in Sources */,
 				D627944F23A9C99800D38C68 /* EditListAccountsViewController.swift in Sources */,
 				D6945C3423AC6431005C403C /* AddSavedHashtagViewController.swift in Sources */,
-				D69261232BB3AEFB0023152C /* VideoOverlayViewController.swift in Sources */,
-				D6934F3C2BAA0F80002B1C8D /* VideoGalleryContentViewController.swift in Sources */,
+				D6934F3C2BAA0F80002B1C8D /* GrayscalableVideoGalleryContentViewController.swift in Sources */,
 				D6F6A552291F098700F496A8 /* RenameListService.swift in Sources */,
 				D62D2426217ABF63005076CC /* UserActivityType.swift in Sources */,
 				D698F46B2BD079F00054DB14 /* AnnouncementListRow.swift in Sources */,
@@ -2190,7 +2179,6 @@
 				D6D94955298963A900C59229 /* Colors.swift in Sources */,
 				D6945C3823AC739F005C403C /* InstanceTimelineViewController.swift in Sources */,
 				D625E4822588262A0074BB2B /* DraggableTableViewCell.swift in Sources */,
-				D6934F322BA7E43E002B1C8D /* LoadingGalleryContentViewController.swift in Sources */,
 				D68E525B24A3D77E0054355A /* TuskerRootViewController.swift in Sources */,
 				D62D2422217AA7E1005076CC /* UserActivityManager.swift in Sources */,
 				D64A50482C739DEA009D7193 /* BaseMainTabBarViewController.swift in Sources */,
@@ -2218,7 +2206,6 @@
 				D630C3CC2BC5FD4600208903 /* GetAuthorizationTokenService.swift in Sources */,
 				D61DC84B28F4FD2000B82C6E /* ProfileHeaderCollectionViewCell.swift in Sources */,
 				D61A45E828DF477D002BE511 /* LoadingCollectionViewCell.swift in Sources */,
-				D6934F3A2BA8F3D7002B1C8D /* FallbackGalleryContentViewController.swift in Sources */,
 				D67B506D250B291200FAECFB /* BlurHashDecode.swift in Sources */,
 				D68A76EC295369A8001DA1B3 /* AboutView.swift in Sources */,
 				04DACE8E212CC7CC009840C4 /* ImageCache.swift in Sources */,
@@ -2303,7 +2290,7 @@
 				D61ABEFE28F1C92600B29151 /* FavoriteService.swift in Sources */,
 				D61F75AB293AF11400C0B37F /* FilterKeywordMO.swift in Sources */,
 				D65B4B5A29720AB000DABDFB /* ReportStatusView.swift in Sources */,
-				D6D9498F298EB79400C59229 /* CopyableLabel.swift in Sources */,
+				D6D9498F298EB79400C59229 /* CopyableLable.swift in Sources */,
 				D6333B792139AEFD00CE884A /* Date+TimeAgo.swift in Sources */,
 				D6D706A029466649000827ED /* ScrollingSegmentedControl.swift in Sources */,
 				D686BBE324FBF8110068E6AA /* WrappedProgressView.swift in Sources */,
@@ -2341,7 +2328,7 @@
 				D61A45EA28DF51EE002BE511 /* TimelineLikeCollectionViewController.swift in Sources */,
 				D64D0AB12128D9AE005A6F37 /* OnboardingViewController.swift in Sources */,
 				D64A50BE2C752247009D7193 /* AdaptableNavigationController.swift in Sources */,
-				D6934F302BA7AF91002B1C8D /* ImageGalleryContentViewController.swift in Sources */,
+				D6934F302BA7AF91002B1C8D /* GrayscalableImageGalleryContentViewController.swift in Sources */,
 				D6934F3E2BAA19D5002B1C8D /* ImageActivityItemSource.swift in Sources */,
 				D67C1795266D57D10070F250 /* FastAccountSwitcherIndicatorView.swift in Sources */,
 				D61F75962937037800C0B37F /* ToggleFollowHashtagService.swift in Sources */,
@@ -2387,6 +2374,7 @@
 				D62E9987279D094F00C26176 /* StatusMetaIndicatorsView.swift in Sources */,
 				D6BEA247291A0F2D002F4D01 /* Duckable+Root.swift in Sources */,
 				D6C1B2082545D1EC00DAAA66 /* StatusCardView.swift in Sources */,
+				D64D8CA92463B494006B0BAA /* MultiThreadDictionary.swift in Sources */,
 				D630C3CA2BC59FF500208903 /* MastodonController+Push.swift in Sources */,
 				D6F6A554291F0D9600F496A8 /* DeleteListService.swift in Sources */,
 				D68E6F5F253C9B2D001A1B4C /* BaseEmojiLabel.swift in Sources */,
@@ -2543,7 +2531,6 @@
 				INFOPLIST_FILE = NotificationExtension/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = NotificationExtension;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2024 Shadowfacts. All rights reserved.";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2576,7 +2563,6 @@
 				INFOPLIST_FILE = NotificationExtension/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = NotificationExtension;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2024 Shadowfacts. All rights reserved.";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2608,7 +2594,6 @@
 				INFOPLIST_FILE = NotificationExtension/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = NotificationExtension;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2024 Shadowfacts. All rights reserved.";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2699,7 +2684,6 @@
 				CURRENT_PROJECT_VERSION = "$(CURRENT_PROJECT_VERSION)";
 				INFOPLIST_FILE = Tusker/Info.plist;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.social-networking";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2743,7 +2727,7 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = TuskerUITests/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2766,7 +2750,6 @@
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = "$(CURRENT_PROJECT_VERSION)";
 				INFOPLIST_FILE = OpenInTusker/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2794,7 +2777,6 @@
 				INFOPLIST_FILE = ShareExtension/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = ShareExtension;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2023 Shadowfacts. All rights reserved.";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2823,7 +2805,6 @@
 				INFOPLIST_FILE = ShareExtension/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = ShareExtension;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2023 Shadowfacts. All rights reserved.";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2852,7 +2833,6 @@
 				INFOPLIST_FILE = ShareExtension/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = ShareExtension;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2023 Shadowfacts. All rights reserved.";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -3008,7 +2988,6 @@
 				CURRENT_PROJECT_VERSION = "$(CURRENT_PROJECT_VERSION)";
 				INFOPLIST_FILE = Tusker/Info.plist;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.social-networking";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -3041,7 +3020,6 @@
 				CURRENT_PROJECT_VERSION = "$(CURRENT_PROJECT_VERSION)";
 				INFOPLIST_FILE = Tusker/Info.plist;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.social-networking";
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -3106,7 +3084,7 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = TuskerUITests/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -3126,7 +3104,7 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = TuskerUITests/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -3149,7 +3127,6 @@
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = "$(CURRENT_PROJECT_VERSION)";
 				INFOPLIST_FILE = OpenInTusker/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -3174,7 +3151,6 @@
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = "$(CURRENT_PROJECT_VERSION)";
 				INFOPLIST_FILE = OpenInTusker/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",

Tusker/Caching/DiskCache.swift

@@ -8,7 +8,6 @@
 
 import Foundation
 import CryptoKit
-import os
 
 struct DiskCacheTransformer<T> {
     let toData: (T) throws -> Data
@@ -22,7 +21,7 @@ class DiskCache<T> {
     let defaultExpiry: CacheExpiry
     let transformer: DiskCacheTransformer<T>
     
-    private var fileStates = OSAllocatedUnfairLock(initialState: [String: FileState]())
+    private var fileStates = MultiThreadDictionary<String, FileState>()
     
     init(name: String, defaultExpiry: CacheExpiry, transformer: DiskCacheTransformer<T>, fileManager: FileManager = .default) throws {
         self.defaultExpiry = defaultExpiry
@@ -60,9 +59,7 @@ class DiskCache<T> {
     }
     
     private func fileState(forKey key: String) -> FileState {
-        return fileStates.withLock {
-            $0[key] ?? .unknown
-        }
+        return fileStates[key] ?? .unknown
     }
     
     func setObject(_ object: T, forKey key: String) throws {
@@ -71,17 +68,13 @@ class DiskCache<T> {
         guard fileManager.createFile(atPath: path, contents: data, attributes: [.modificationDate: defaultExpiry.date]) else {
             throw Error.couldNotCreateFile
         }
-        fileStates.withLock {
-            $0[key] = .exists
-        }
+        fileStates[key] = .exists
     }
     
     func removeObject(forKey key: String) throws {
         let path = makeFilePath(for: key)
         try fileManager.removeItem(atPath: path)
-        fileStates.withLock {
-            $0[key] = .doesNotExist
-        }
+        fileStates[key] = .doesNotExist
     }
     
     func existsObject(forKey key: String) throws -> Bool {
@@ -112,9 +105,7 @@ class DiskCache<T> {
         }
         guard date.timeIntervalSinceNow >= 0 else {
             try fileManager.removeItem(atPath: path)
-            fileStates.withLock {
-                $0[key] = .doesNotExist
-            }
+            fileStates[key] = .doesNotExist
             throw Error.expired
         }
         

Tusker/CoreData/MastodonCachePersistentStore.swift

@@ -375,13 +375,14 @@ class MastodonCachePersistentStore: NSPersistentCloudKitContainer, @unchecked Se
         }
     }
 
-    func addAll(notifications: [Pachyderm.Notification], completion: (() -> Void)? = nil) {
-        backgroundContext.perform {
+    func addAll(notifications: [Pachyderm.Notification], in context: NSManagedObjectContext? = nil, completion: (() -> Void)? = nil) {
+        let context = context ?? backgroundContext
+        context.perform {
             let statuses = notifications.compactMap { $0.status }
             let accounts = notifications.map { $0.account }
-            statuses.forEach { self.upsert(status: $0, context: self.backgroundContext) }
-            accounts.forEach { self.upsert(account: $0, in: self.backgroundContext) }
-            self.save(context: self.backgroundContext)
+            statuses.forEach { self.upsert(status: $0, context: context) }
+            accounts.forEach { self.upsert(account: $0, in: context) }
+            self.save(context: context)
             completion?()
             statuses.forEach { self.statusSubject.send($0.id) }
             accounts.forEach { self.accountSubject.send($0.id) }

Tusker/CoreData/TimelinePosition.swift

@@ -76,10 +76,17 @@ func fromTimelineKind(_ kind: String) -> Timeline {
     } else if kind == "direct" {
         return .direct
     } else if kind.starts(with: "hashtag:") {
-        return .tag(hashtag: String(kind.trimmingPrefix("hashtag:")))
+        return .tag(hashtag: String(trimmingPrefix("hashtag:", of: kind)))
     } else if kind.starts(with: "list:") {
-        return .list(id: String(kind.trimmingPrefix("list:")))
+        return .list(id: String(trimmingPrefix("list:", of: kind)))
     } else {
         fatalError("invalid timeline kind \(kind)")
     }
 }
+
+// replace with Collection.trimmingPrefix
+@available(iOS, obsoleted: 16.0)
+@available(visionOS 1.0, *)
+private func trimmingPrefix(_ prefix: String, of str: String) -> Substring {
+    return str[str.index(str.startIndex, offsetBy: prefix.count)...]
+}

Tusker/Extensions/View+AppListStyle.swift

@@ -36,12 +36,19 @@ private struct AppGroupedListBackground: ViewModifier {
     }
     
     func body(content: Content) -> some View {
-        if colorScheme == .dark, !pureBlackDarkMode {
-            content
-                .scrollContentBackground(.hidden)
-                .background(Color.appGroupedBackground.edgesIgnoringSafeArea(.all))
+        if #available(iOS 16.0, *) {
+            if colorScheme == .dark, !pureBlackDarkMode {
+                content
+                    .scrollContentBackground(.hidden)
+                    .background(Color.appGroupedBackground.edgesIgnoringSafeArea(.all))
+            } else {
+                content
+            }
         } else {
             content
+                .onAppear {
+                    UITableView.appearance(whenContainedInInstancesOf: [container]).backgroundColor = .appGroupedBackground
+                }
         }
     }
 }

Tusker/HTMLConverter.swift

@@ -48,13 +48,14 @@ extension HTMLConverter {
             // Converting WebURL to URL is a small but non-trivial expense (since it works by
             // serializing the WebURL as a string and then having Foundation parse it again),
             // so, if available, use the system parser which doesn't require another round trip.
-            if let url = try? URL.ParseStrategy().parse(string) {
+            if #available(iOS 16.0, macOS 13.0, *),
+               let url = try? URL.ParseStrategy().parse(string) {
                 url
             } else if let web = WebURL(string),
                       let url = URL(web) {
                 url
             } else {
-                nil
+                URL(string: string)
             }
         }
         

Tusker/MultiThreadDictionary.swift

@@ -0,0 +1,104 @@
+//
+//  MultiThreadDictionary.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 5/6/20.
+//  Copyright © 2020 Shadowfacts. All rights reserved.
+//
+
+import Foundation
+import os
+
+// once we target iOS 16, replace uses of this with OSAllocatedUnfairLock<[Key: Value]>
+// to make the lock semantics more clear
+@available(iOS, obsoleted: 16.0)
+@available(visionOS 1.0, *)
+final class MultiThreadDictionary<Key: Hashable & Sendable, Value: Sendable>: @unchecked Sendable {
+    #if os(visionOS)
+    private let lock = OSAllocatedUnfairLock(initialState: [Key: Value]())
+    #else
+    private let lock: any Lock<[Key: Value]>
+    #endif
+    
+    init() {
+        #if !os(visionOS)
+        if #available(iOS 16.0, *) {
+            self.lock = OSAllocatedUnfairLock(initialState: [:])
+        } else {
+            self.lock = UnfairLock(initialState: [:])
+        }
+        #endif
+    }
+    
+    subscript(key: Key) -> Value? {
+        get {
+            return lock.withLock { dict in
+                dict[key]
+            }
+        }
+        set(value) {
+            #if os(visionOS)
+            lock.withLock { dict in
+                dict[key] = value
+            }
+            #else
+            _ = lock.withLock { dict in
+                dict[key] = value
+            }
+            #endif
+        }
+    }
+    
+    /// If the result of this function is unused, it is preferable to use `removeValueWithoutReturning` as it executes asynchronously and doesn't block the calling thread.
+    func removeValue(forKey key: Key) -> Value? {
+        return lock.withLock { dict in
+            dict.removeValue(forKey: key)
+        }
+    }
+    
+    func contains(key: Key) -> Bool {
+        return lock.withLock { dict in
+            dict.keys.contains(key)
+        }
+    }
+    
+    // TODO: this should really be throws/rethrows but the stupid type-erased lock makes that not possible
+    func withLock<R>(_ body: @Sendable (inout [Key: Value]) throws -> R) rethrows -> R where R: Sendable {
+        return try lock.withLock { dict in
+            return try body(&dict)
+        }
+    }
+}
+
+#if !os(visionOS)
+// TODO: replace this only with OSAllocatedUnfairLock
+@available(iOS, obsoleted: 16.0)
+fileprivate protocol Lock<State> {
+    associatedtype State
+    func withLock<R>(_ body: @Sendable (inout State) throws -> R) rethrows -> R where R: Sendable
+}
+
+@available(iOS 16.0, *)
+extension OSAllocatedUnfairLock: Lock {
+}
+
+// from http://www.russbishop.net/the-law
+fileprivate class UnfairLock<State>: Lock {
+    private var lock: UnsafeMutablePointer<os_unfair_lock>
+    private var state: State
+    init(initialState: State) {
+        self.state = initialState
+        self.lock = .allocate(capacity: 1)
+        self.lock.initialize(to: os_unfair_lock())
+    }
+    deinit {
+        self.lock.deinitialize(count: 1)
+        self.lock.deallocate()
+    }
+    func withLock<R>(_ body: (inout State) throws -> R) rethrows -> R where R: Sendable {
+        os_unfair_lock_lock(lock)
+        defer { os_unfair_lock_unlock(lock) }
+        return try body(&state)
+    }
+}
+#endif

Tusker/Scenes/MainSceneDelegate.swift

@@ -274,7 +274,8 @@ class MainSceneDelegate: UIResponder, UIWindowSceneDelegate, TuskerSceneDelegate
         } else {
             mainVC = MainSplitViewController(mastodonController: mastodonController)
         }
-        if UIDevice.current.userInterfaceIdiom == .phone {
+        if UIDevice.current.userInterfaceIdiom == .phone,
+           #available(iOS 16.0, *) {
             // TODO: maybe the duckable container should be outside the account switching container
             return DuckableContainerViewController(child: mainVC)
         } else {

Tusker/Screens/Announcements/AddReactionView.swift

@@ -86,7 +86,7 @@ struct AddReactionView: View {
             }
         }
         .navigationViewStyle(.stack)
-        .presentationDetents([.medium, .large])
+        .mediumPresentationDetentIfAvailable()
         .alertWithData("Error Adding Reaction", data: $error, actions: { _ in
             Button("OK") {}
         }, message: { error in
@@ -171,6 +171,17 @@ private struct AddReactionButton<Label: View>: View {
 }
 
 private extension View {
+    @available(iOS, obsoleted: 16.0)
+    @available(visionOS 1.0, *)
+    @ViewBuilder
+    func mediumPresentationDetentIfAvailable() -> some View {
+        if #available(iOS 16.0, *) {
+            self.presentationDetents([.medium, .large])
+        } else {
+            self
+        }
+    }
+    
     @available(iOS, obsoleted: 17.1)
     @available(visionOS 1.0, *)
     @ViewBuilder

Tusker/Screens/Announcements/AnnouncementListRow.swift

@@ -20,10 +20,14 @@ struct AnnouncementListRow: View {
     @State private var isShowingAddReactionSheet = false
     
     var body: some View {
-        mostOfTheBody
-            .alignmentGuide(.listRowSeparatorLeading, computeValue: { dimension in
-                dimension[.leading]
-            })
+        if #available(iOS 16.0, *) {
+            mostOfTheBody
+                .alignmentGuide(.listRowSeparatorLeading, computeValue: { dimension in
+                    dimension[.leading]
+                })
+        } else {
+            mostOfTheBody
+        }
     }
     
     private var mostOfTheBody: some View {
@@ -50,7 +54,11 @@ struct AnnouncementListRow: View {
                         Label {
                             Text("Add Reaction")
                         } icon: {
-                            Image("face.smiling.badge.plus")
+                            if #available(iOS 16.0, *) {
+                                Image("face.smiling.badge.plus")
+                            } else {
+                                Image(systemName: "face.smiling")
+                            }
                         }
                     }
                     .labelStyle(.iconOnly)

Tusker/Screens/Conversation/ConversationViewController.swift

@@ -484,3 +484,11 @@ extension ConversationViewController: StatusBarTappableViewController {
         }
     }
 }
+
+extension ConversationViewController: RefreshableViewController {
+    func refresh() {
+        Task {
+            await refreshContext()
+        }
+    }
+}

Tusker/Screens/Customize Timelines/AddHashtagPinnedTimelineView.swift

@@ -9,6 +9,20 @@
 import SwiftUI
 import Pachyderm
 
+@available(iOS, obsoleted: 16.0)
+struct AddHashtagPinnedTimelineRepresentable: UIViewControllerRepresentable {
+    typealias UIViewControllerType = UIHostingController<AddHashtagPinnedTimelineView>
+    
+    @Binding var pinnedTimelines: [PinnedTimeline]
+    
+    func makeUIViewController(context: Context) -> UIHostingController<AddHashtagPinnedTimelineView> {
+        return UIHostingController(rootView: AddHashtagPinnedTimelineView(pinnedTimelines: $pinnedTimelines))
+    }
+    
+    func updateUIViewController(_ uiViewController: UIHostingController<AddHashtagPinnedTimelineView>, context: Context) {
+    }
+}
+
 struct AddHashtagPinnedTimelineView: View {
     @EnvironmentObject private var mastodonController: MastodonController
     @Environment(\.dismiss) private var dismiss
@@ -35,6 +49,9 @@ struct AddHashtagPinnedTimelineView: View {
     var body: some View {
         NavigationView {
             list
+                #if !os(visionOS)
+                .appGroupedListBackground(container: AddHashtagPinnedTimelineRepresentable.UIViewControllerType.self)
+                #endif
                 .listStyle(.grouped)
                 .navigationTitle("Add Hashtag")
                 .navigationBarTitleDisplayMode(.inline)

Tusker/Screens/Customize Timelines/CustomizeTimelinesView.swift

@@ -36,8 +36,15 @@ struct CustomizeTimelinesList: View {
     }
 
     var body: some View {
-        NavigationStack {
-            navigationBody
+        if #available(iOS 16.0, *) {
+            NavigationStack {
+                navigationBody
+            }
+        } else {
+            NavigationView {
+                navigationBody
+            }
+            .navigationViewStyle(.stack)
         }
     }
     

Tusker/Screens/Customize Timelines/EditFilterView.swift

@@ -149,7 +149,7 @@ struct EditFilterView: View {
         }
         .appGroupedListBackground(container: UIHostingController<CustomizeTimelinesList>.self)
         #if !os(visionOS)
-        .scrollDismissesKeyboard(.interactively)
+        .scrollDismissesKeyboardInteractivelyIfAvailable()
         #endif
         .navigationTitle(create ? "Add Filter" : "Edit Filter")
         .navigationBarTitleDisplayMode(.inline)
@@ -226,6 +226,18 @@ private struct FilterContextToggleStyle: ToggleStyle {
     }
 }
 
+private extension View {
+    @available(iOS, obsoleted: 16.0)
+    @ViewBuilder
+    func scrollDismissesKeyboardInteractivelyIfAvailable() -> some View {
+        if #available(iOS 16.0, *) {
+            self.scrollDismissesKeyboard(.interactively)
+        } else {
+            self
+        }
+    }
+}
+
 //struct EditFilterView_Previews: PreviewProvider {
 //    static var previews: some View {
 //        EditFilterView()

Tusker/Screens/Customize Timelines/PinnedTimelinesView.swift

@@ -115,8 +115,18 @@ struct PinnedTimelinesModifier: ViewModifier {
     func body(content: Content) -> some View {
         content
             .sheet(isPresented: $isShowingAddHashtagSheet, content: {
+                #if os(visionOS)
                 AddHashtagPinnedTimelineView(pinnedTimelines: $pinnedTimelines)
                     .edgesIgnoringSafeArea(.bottom)
+                #else
+                if #available(iOS 16.0, *) {
+                    AddHashtagPinnedTimelineView(pinnedTimelines: $pinnedTimelines)
+                        .edgesIgnoringSafeArea(.bottom)
+                } else {
+                    AddHashtagPinnedTimelineRepresentable(pinnedTimelines: $pinnedTimelines)
+                        .edgesIgnoringSafeArea(.bottom)
+                }
+                #endif
             })
             .sheet(isPresented: $isShowingAddInstanceSheet, content: {
                 AddInstancePinnedTimelineView(pinnedTimelines: $pinnedTimelines)

Tusker/Screens/Explore/InlineTrendsViewController.swift

@@ -41,7 +41,9 @@ class InlineTrendsViewController: UIViewController {
 
         navigationItem.searchController = searchController
         navigationItem.hidesSearchBarWhenScrolling = false
-        navigationItem.preferredSearchBarPlacement = .stacked
+        if #available(iOS 16.0, *) {
+            navigationItem.preferredSearchBarPlacement = .stacked
+        }
         
         let trends = TrendsViewController(mastodonController: mastodonController)
         trends.view.translatesAutoresizingMaskIntoConstraints = false

Tusker/Screens/Explore/TrendingLinkCardView.swift

@@ -16,15 +16,11 @@ struct TrendingLinkCardView: View {
     let card: Card
     
     private var imageURL: URL? {
-        if let image = card.image {
-            URL(image)
-        } else {
-            nil
-        }
+        card.image.flatMap { URL($0) }
     }
     
     private var descriptionText: String {
-        var converter = TextConverter(configuration: .init(insertNewlines: false))
+        let converter = TextConverter(configuration: .init(insertNewlines: false))
         return converter.convert(html: card.description)
     }
     

Tusker/Screens/Explore/TrendsViewController.swift

@@ -525,12 +525,12 @@ extension TrendsViewController: UICollectionViewDelegate {
         }
     }
     
-    func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemsAt indexPaths: [IndexPath], point: CGPoint) -> UIContextMenuConfiguration? {
-        guard indexPaths.count == 1,
-              let item = dataSource.itemIdentifier(for: indexPaths[0])  else {
+    @available(iOS, obsoleted: 16.0)
+    @available(visionOS 1.0, *)
+    func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
+        guard let item = dataSource.itemIdentifier(for: indexPath) else {
             return nil
         }
-        let indexPath = indexPaths[0]
         
         switch item {
         case .loadingIndicator, .confirmLoadMoreStatuses(_):
@@ -584,6 +584,15 @@ extension TrendsViewController: UICollectionViewDelegate {
         }
     }
     
+    // implementing the highlightPreviewForItemAt method seems to prevent the old, single IndexPath variant of this method from being called on iOS 16
+    @available(iOS 16.0, visionOS 1.0, *)
+    func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemsAt indexPaths: [IndexPath], point: CGPoint) -> UIContextMenuConfiguration? {
+        guard indexPaths.count == 1 else {
+            return nil
+        }
+        return self.collectionView(collectionView, contextMenuConfigurationForItemAt: indexPaths[0], point: point)
+    }
+    
     func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
         MenuPreviewHelper.willPerformPreviewAction(animator: animator, presenter: self)
     }

Tusker/Screens/Gallery/GifvGalleryContentViewController.swift

@@ -69,4 +69,8 @@ class GifvGalleryContentViewController: UIViewController, GalleryContentViewCont
         [VideoActivityItemSource(asset: controller.item.asset, url: url)]
     }
     
+    var presentationAnimation: GalleryContentPresentationAnimation {
+        .fromSourceViewWithoutSnapshot
+    }
+    
 }

Tusker/Screens/Gallery/GrayscalableImageGalleryContentViewController.swift

@@ -0,0 +1,60 @@
+//
+//  GrayscalableImageGalleryContentViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 11/21/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+import TuskerComponents
+import GalleryVC
+
+class GrayscalableImageGalleryContentViewController: GalleryVC.ImageGalleryContentViewController {
+    private let url: URL
+    private let originalImage: UIImage
+    private let originalData: Data?
+    private var isGrayscale = false
+    
+    init(url: URL, caption: String?, originalData: Data?, image: UIImage, gifController: GIFController?) {
+        self.url = url
+        self.originalImage = image
+        self.originalData = originalData
+        
+        super.init(image: image, caption: caption, gifController: gifController)
+        
+        isGrayscale = Preferences.shared.grayscaleImages
+        if isGrayscale {
+            self.image = ImageGrayscalifier.convert(url: url, image: image) ?? image
+        }
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
+    }
+    
+    @MainActor required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    @objc private func preferencesChanged() {
+        if isGrayscale != Preferences.shared.grayscaleImages {
+            isGrayscale = Preferences.shared.grayscaleImages
+            let image = if isGrayscale {
+                ImageGrayscalifier.convert(url: url, image: originalImage)
+            } else {
+                originalImage
+            }
+            if let image {
+                self.image = image
+            }
+        }
+    }
+    
+    override var activityItemsForSharing: [Any] {
+        if let data = originalData ?? image.pngData() {
+            return [ImageActivityItemSource(data: data, url: url, image: image)]
+        } else {
+            return []
+        }
+    }
+    
+}

Tusker/Screens/Gallery/GrayscalableVideoGalleryContentViewController.swift

@@ -0,0 +1,83 @@
+//
+//  GrayscalableVideoGalleryContentViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 11/21/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+import GalleryVC
+import AVFoundation
+
+class GrayscalableVideoGalleryContentViewController: GalleryVC.VideoGalleryContentViewController {
+    private var audioSessionToken: AudioSessionCoordinator.Token?
+    private var isGrayscale: Bool
+    private var isFirstAppearance = true
+
+    override init(url: URL, caption: String?) {
+        self.isGrayscale = Preferences.shared.grayscaleImages
+        
+        super.init(url: url, caption: caption)
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
+    }
+    
+    @MainActor required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    override class func createItem(asset: AVAsset) -> AVPlayerItem {
+        let item = AVPlayerItem(asset: asset)
+        if Preferences.shared.grayscaleImages {
+            #if os(visionOS)
+            #warning("Use async AVVideoComposition CIFilter initializer")
+            #else
+            let filter = CIFilter(name: "CIColorMonochrome")!
+            filter.setValue(CIColor(red: 0.85, green: 0.85, blue: 0.85), forKey: "inputColor")
+            filter.setValue(1.0, forKey: "inputIntensity")
+            
+            item.videoComposition = AVVideoComposition(asset: asset, applyingCIFiltersWithHandler: { request in
+                filter.setValue(request.sourceImage, forKey: "inputImage")
+                request.finish(with: filter.outputImage!, context: nil)
+            })
+            #endif
+        }
+        return item
+    }
+    
+    @objc private func preferencesChanged() {
+        if isGrayscale != Preferences.shared.grayscaleImages {
+            let isPlaying = player.rate > 0
+            isGrayscale = Preferences.shared.grayscaleImages
+            replaceCurrentItem(with: Self.createItem(asset: item.asset))
+            if isPlaying {
+                player.play()
+            }
+        }
+    }
+    
+    override func galleryContentDidAppear() {
+        super.galleryContentDidAppear()
+        
+        let wasFirstAppearance = isFirstAppearance
+        isFirstAppearance = false
+        
+        audioSessionToken = AudioSessionCoordinator.shared.beginPlayback(mode: .video) {
+            if wasFirstAppearance {
+                DispatchQueue.main.async {
+                    self.player.play()
+                }
+            }
+        }
+    }
+    
+    override func galleryContentWillDisappear() {
+        super.galleryContentWillDisappear()
+        
+        if let audioSessionToken {
+            AudioSessionCoordinator.shared.endPlayback(token: audioSessionToken)
+        }
+    }
+    
+}

Tusker/Screens/Gallery/ImageGalleryDataSource.swift

@@ -34,7 +34,7 @@ class ImageGalleryDataSource: GalleryDataSource {
                 } else {
                     nil
                 }
-            return ImageGalleryContentViewController(
+            return GrayscalableImageGalleryContentViewController(
                 url: url,
                 caption: nil,
                 originalData: entry.data,
@@ -52,7 +52,7 @@ class ImageGalleryDataSource: GalleryDataSource {
                         } else {
                             nil
                         }
-                    return ImageGalleryContentViewController(
+                    return GrayscalableImageGalleryContentViewController(
                         url: self.url,
                         caption: nil,
                         originalData: data,

Tusker/Screens/Gallery/StatusAttachmentsGalleryDataSource.swift

@@ -33,7 +33,7 @@ class StatusAttachmentsGalleryDataSource: GalleryDataSource {
         case .image:
             if let view = attachmentView(for: attachment),
                let image = view.attachmentImage {
-                return ImageGalleryContentViewController(
+                return GrayscalableImageGalleryContentViewController(
                     url: attachment.url,
                     caption: attachment.description,
                     originalData: view.originalData,
@@ -49,7 +49,7 @@ class StatusAttachmentsGalleryDataSource: GalleryDataSource {
                     } else {
                         nil
                     }
-                return ImageGalleryContentViewController(
+                return GrayscalableImageGalleryContentViewController(
                     url: attachment.url,
                     caption: attachment.description,
                     originalData: entry.data,
@@ -68,7 +68,7 @@ class StatusAttachmentsGalleryDataSource: GalleryDataSource {
                             } else {
                                 nil
                             }
-                        return ImageGalleryContentViewController(
+                        return GrayscalableImageGalleryContentViewController(
                             url: attachment.url,
                             caption: attachment.description,
                             originalData: data,
@@ -91,10 +91,10 @@ class StatusAttachmentsGalleryDataSource: GalleryDataSource {
                 }
             return GifvGalleryContentViewController(controller: controller, url: attachment.url, caption: attachment.description)
         case .video:
-            return VideoGalleryContentViewController(url: attachment.url, caption: attachment.description)
+            return GrayscalableVideoGalleryContentViewController(url: attachment.url, caption: attachment.description)
         case .audio:
             // TODO: use separate content VC with audio visualization?
-            return VideoGalleryContentViewController(url: attachment.url, caption: attachment.description)
+            return GrayscalableVideoGalleryContentViewController(url: attachment.url, caption: attachment.description)
         case .unknown:
             return LoadingGalleryContentViewController(caption: nil) {
                 do {

Tusker/Screens/Lists/EditListAccountsViewController.swift

@@ -100,13 +100,28 @@ class EditListAccountsViewController: UIViewController, CollectionViewController
         
         navigationItem.searchController = searchController
         navigationItem.hidesSearchBarWhenScrolling = false
-        navigationItem.preferredSearchBarPlacement = .stacked
-        
-        navigationItem.renameDelegate = self
-        navigationItem.titleMenuProvider = { [unowned self] suggested in
-            var children = suggested
-            children.append(contentsOf: self.listSettingsMenuElements())
-            return UIMenu(children: children)
+        if #available(iOS 16.0, *) {
+            navigationItem.preferredSearchBarPlacement = .stacked
+            
+            navigationItem.renameDelegate = self
+            navigationItem.titleMenuProvider = { [unowned self] suggested in
+                var children = suggested
+                children.append(contentsOf: self.listSettingsMenuElements())
+                return UIMenu(children: children)
+            }
+        } else {
+            navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Edit", menu: UIMenu(children: [
+                // uncached so that menu always reflects the current state of the list
+                UIDeferredMenuElement.uncached({ [unowned self] elementHandler in
+                    var elements = self.listSettingsMenuElements()
+                    elements.insert(UIAction(title: "Rename…", image: UIImage(systemName: "pencil"), handler: { [unowned self] _ in
+                        RenameListService(list: self.list, mastodonController: self.mastodonController, present: {
+                            self.present($0, animated: true)
+                        }).run()
+                    }), at: 0)
+                    elementHandler(elements)
+                })
+            ]))
         }
     }
     

Tusker/Screens/Main/BaseMainTabBarViewController.swift

@@ -151,6 +151,22 @@ class BaseMainTabBarViewController: UITabBarController, FastAccountSwitcherViewC
         return false
         #endif // !os(visionOS)
     }
+    
+    // MARK: Keyboard shortcuts
+    
+    override func target(forAction action: Selector, withSender sender: Any?) -> Any? {
+        // This is a silly workaround for when the sidebar is focused (and therefore first responder), which,
+        // unfortunately, is almost always. Because the content view controller then isn't in the responder chain,
+        // we manually delegate to the top view controller if possible.
+        if action == #selector(RefreshableViewController.refresh),
+           let selected = selectedViewController as? NavigationControllerProtocol,
+           let top = selected.topViewController as? RefreshableViewController {
+            return top
+        } else {
+            return super.target(forAction: action, withSender: sender)
+        }
+    }
+
 }
 
 extension BaseMainTabBarViewController: TuskerNavigationDelegate {

Tusker/Screens/Main/MainSplitViewController.swift

@@ -219,6 +219,19 @@ class MainSplitViewController: UISplitViewController {
     @objc func handleComposeKeyCommand() {
         compose(editing: nil)
     }
+    
+    override func target(forAction action: Selector, withSender sender: Any?) -> Any? {
+        // This is a silly workaround for when the sidebar is focused (and therefore first responder), which,
+        // unfortunately, is almost always. Because the content view controller then isn't in the responder chain,
+        // we manually delegate to the top view controller if possible.
+        if action == #selector(RefreshableViewController.refresh),
+           traitCollection.horizontalSizeClass == .regular,
+           let top = secondaryNavController.topViewController as? RefreshableViewController {
+            return top
+        } else {
+            return super.target(forAction: action, withSender: sender)
+        }
+    }
 
 }
 

Tusker/Screens/Main/NewMainTabBarViewController.swift

@@ -33,6 +33,13 @@ final class NewMainTabBarViewController: BaseMainTabBarViewController {
     private var isCompact: Bool?
     @Box fileprivate var myProfileCell: UIView?
     private var sidebarTapRecognizer: UITapGestureRecognizer?
+    
+    private lazy var fastAccountSwitcherIndicator: UIView = {
+        let indicator = FastAccountSwitcherIndicatorView()
+        // need to explicitly set the frame to get it vertically centered
+        indicator.frame = CGRect(origin: .zero, size: indicator.intrinsicContentSize)
+        return indicator
+    }()
 
     override func viewDidLoad() {
         super.viewDidLoad()
@@ -513,13 +520,6 @@ extension NewMainTabBarViewController: UITabBarControllerDelegate {
     }
 }
 
-private var fastAccountSwitcherIndicator: UIView = {
-    let indicator = FastAccountSwitcherIndicatorView()
-    // need to explicitly set the frame to get it vertically centered
-    indicator.frame = CGRect(origin: .zero, size: indicator.intrinsicContentSize)
-    return indicator
-}()
-
 @available(iOS 18.0, *)
 extension NewMainTabBarViewController: UITabBarController.Sidebar.Delegate {
     func tabBarController(_ tabBarController: UITabBarController, sidebarVisibilityWillChange sidebar: UITabBarController.Sidebar, animator: any UITabBarController.Sidebar.Animating) {

Tusker/Screens/Mute/MuteAccountView.swift

@@ -41,8 +41,15 @@ struct MuteAccountView: View {
     @State private var error: Error?
     
     var body: some View {
-        NavigationStack {
-            navigationViewContent
+        if #available(iOS 16.0, *) {
+            NavigationStack {
+                navigationViewContent
+            }
+        } else {
+            NavigationView {
+                navigationViewContent
+            }
+            .navigationViewStyle(.stack)
         }
     }
     

Tusker/Screens/Notifications/FollowRequestNotificationViewController.swift

@@ -101,8 +101,14 @@ extension FollowRequestNotificationViewController: UICollectionViewDelegate {
                 UIAction(title: "Accept", image: UIImage(systemName: "checkmark.circle"), handler: { _ in cell.acceptButtonPressed() }),
                 UIAction(title: "Reject", image: UIImage(systemName: "xmark.circle"), handler: { _ in cell.rejectButtonPressed() }),
             ]
+            let acceptRejectMenu: UIMenu
+            if #available(iOS 16.0, *) {
+                acceptRejectMenu = UIMenu(options: .displayInline, preferredElementSize: .medium, children: acceptRejectChildren)
+            } else {
+                acceptRejectMenu = UIMenu(options: .displayInline, children: acceptRejectChildren)
+            }
             return UIMenu(children: [
-                UIMenu(options: .displayInline, preferredElementSize: .medium, children: acceptRejectChildren),
+                acceptRejectMenu,
                 UIMenu(options: .displayInline, children: self.actionsForProfile(accountID: accountID, source: .view(cell))),
             ])
         }

Tusker/Screens/Notifications/NotificationLoadingViewController.swift

@@ -48,7 +48,9 @@ class NotificationLoadingViewController: UIViewController {
             do {
                 let (notification, _) = try await mastodonController.run(request)
                 await withCheckedContinuation { continuation in
-                    mastodonController.persistentContainer.addAll(notifications: [notification]) {
+                    let container = mastodonController.persistentContainer
+                    let context = container.viewContext
+                    container.addAll(notifications: [notification], in: context) {
                         continuation.resume()
                     }
                 }

Tusker/Screens/Notifications/NotificationsCollectionViewController.swift

@@ -700,8 +700,14 @@ extension NotificationsCollectionViewController: UICollectionViewDelegate {
                     UIAction(title: "Accept", image: UIImage(systemName: "checkmark.circle"), handler: { _ in cell.acceptButtonPressed() }),
                     UIAction(title: "Reject", image: UIImage(systemName: "xmark.circle"), handler: { _ in cell.rejectButtonPressed() }),
                 ]
+                let acceptRejectMenu: UIMenu
+                if #available(iOS 16.0, *) {
+                    acceptRejectMenu = UIMenu(options: .displayInline, preferredElementSize: .medium, children: acceptRejectChildren)
+                } else {
+                    acceptRejectMenu = UIMenu(options: .displayInline, children: acceptRejectChildren)
+                }
                 return UIMenu(children: [
-                    UIMenu(options: .displayInline, preferredElementSize: .medium, children: acceptRejectChildren),
+                    acceptRejectMenu,
                     UIMenu(options: .displayInline, children: self.actionsForProfile(accountID: accountID, source: .view(cell))),
                 ])
             }

Tusker/Screens/Notifications/NotificationsPageViewController.swift

@@ -180,3 +180,9 @@ extension NotificationsPageViewController: StateRestorableViewController {
         return currentPage.userActivity(accountID: mastodonController.accountInfo!.id)
     }
 }
+
+extension NotificationsPageViewController: RefreshableViewController {
+    func refresh() {
+        (currentViewController as? RefreshableViewController)?.refresh()
+    }
+}

Tusker/Screens/Onboarding/InstanceSelectorTableViewController.swift

@@ -75,13 +75,14 @@ class InstanceSelectorTableViewController: UITableViewController {
         
         dataSource = UITableViewDiffableDataSource(tableView: tableView, cellProvider: { (tableView, indexPath, item) -> UITableViewCell? in
             switch item {
-            case let .selected(_, instance):
+            case let .selected(_, info):
                 let cell = tableView.dequeueReusableCell(withIdentifier: instanceCell, for: indexPath) as! InstanceTableViewCell
-                cell.updateUI(instance: instance)
+                cell.updateUI(info: info)
                 return cell
             case let .recommended(instance):
                 let cell = tableView.dequeueReusableCell(withIdentifier: instanceCell, for: indexPath) as! InstanceTableViewCell
-                cell.updateUI(instance: instance)
+                let info = Info(host: instance.domain, description: instance.description, thumbnail: instance.proxiedThumbnailURL, adult: instance.category == "adult")
+                cell.updateUI(info: info)
                 return cell
             }
         })
@@ -96,7 +97,9 @@ class InstanceSelectorTableViewController: UITableViewController {
         searchController.searchBar.placeholder = "Search or enter a URL"
         navigationItem.searchController = searchController
         navigationItem.hidesSearchBarWhenScrolling = false
-        navigationItem.preferredSearchBarPlacement = .stacked
+        if #available(iOS 16.0, *) {
+            navigationItem.preferredSearchBarPlacement = .stacked
+        }
         definesPresentationContext = true
         
         urlHandler = urlCheckerSubject
@@ -162,22 +165,20 @@ class InstanceSelectorTableViewController: UITableViewController {
             return
         }
 
-        let client = Client(baseURL: url, session: .appDefault)
-        let request = Client.getInstanceV1()
-        client.run(request) { (response) in
+        checkSpecificInstance(url: url) { (info) in
             var snapshot = self.dataSource.snapshot()
             if snapshot.indexOfSection(.selected) != nil {
                 snapshot.deleteSections([.selected])
             }
 
-            if case let .success(instance, _) = response {
+            if let info {
                 if snapshot.indexOfSection(.recommendedInstances) != nil {
                     snapshot.insertSections([.selected], beforeSection: .recommendedInstances)
                 } else {
                     snapshot.appendSections([.selected])
                 }
                 
-                snapshot.appendItems([.selected(url, instance)], toSection: .selected)
+                snapshot.appendItems([.selected(url, info)], toSection: .selected)
                 
                 DispatchQueue.main.async {
                     self.dataSource.apply(snapshot) {
@@ -192,6 +193,29 @@ class InstanceSelectorTableViewController: UITableViewController {
         }
     }
     
+    private func checkSpecificInstance(url: URL, completionHandler: @escaping (Info?) -> Void) {
+        let client = Client(baseURL: url, session: .appDefault)
+        let request = Client.getInstanceV1()
+        client.run(request) { response in
+            switch response {
+            case .success(let instance, _):
+                let host = url.host ?? URLComponents(string: instance.uri)?.host ?? instance.uri
+                let info = Info(host: host, description: instance.shortDescription ?? instance.description, thumbnail: instance.thumbnail, adult: false)
+                completionHandler(info)
+            case .failure(_):
+                Task {
+                    do {
+                        let nodeInfo = try await client.nodeInfo()
+                        let info = Info(host: url.host!, description: nodeInfo.metadata.nodeDescription, thumbnail: nil, adult: false)
+                        completionHandler(info)
+                    } catch {
+                        completionHandler(nil)
+                    }
+                }
+            }
+        }
+    }
+    
     private func loadRecommendedInstances() {
         InstanceSelector.getInstances(category: nil) { (response) in
             DispatchQueue.main.async {
@@ -310,13 +334,13 @@ extension InstanceSelectorTableViewController {
         case recommendedInstances
     }
     enum Item: Equatable, Hashable, Sendable {
-        case selected(URL, InstanceV1)
+        case selected(URL, Info)
         case recommended(InstanceSelector.Instance)
         
         static func ==(lhs: Item, rhs: Item) -> Bool {
             switch (lhs, rhs) {
-            case let (.selected(urlA, instanceA), .selected(urlB, instanceB)):
-                return urlA == urlB && instanceA.uri == instanceB.uri
+            case let (.selected(urlA, _), .selected(urlB, _)):
+                return urlA == urlB
             case let (.recommended(a), .recommended(b)):
                 return a.domain == b.domain
             default:
@@ -326,16 +350,21 @@ extension InstanceSelectorTableViewController {
         
         func hash(into hasher: inout Hasher) {
             switch self {
-            case let .selected(url, instance):
+            case let .selected(url, _):
                 hasher.combine(0)
                 hasher.combine(url)
-                hasher.combine(instance.uri)
             case let .recommended(instance):
                 hasher.combine(1)
                 hasher.combine(instance.domain)
             }
         }
     }
+    struct Info: Hashable {
+        let host: String
+        let description: String
+        let thumbnail: URL?
+        let adult: Bool
+    }
 }
 
 extension InstanceSelectorTableViewController: UISearchResultsUpdating {

Tusker/Screens/Preferences/About/AboutView.swift

@@ -91,10 +91,14 @@ struct AboutView: View {
     
     @ViewBuilder
     private var iconOrGame: some View {
-        FlipView {
+        if #available(iOS 16.0, *) {
+            FlipView {
+                appIcon
+            } back: {
+                TTTView()
+            }
+        } else {
             appIcon
-        } back: {
-            TTTView()
         }
     }
     

Tusker/Screens/Preferences/Appearance/AppearancePrefsView.swift

@@ -27,7 +27,14 @@ struct AppearancePrefsView: View {
     private static let accentColorsAndImages: [(AccentColor, UIImage?)] = AccentColor.allCases.map { color in
         var image: UIImage?
         if let color = color.color {
-            image = UIImage(systemName: "circle.fill")!.withTintColor(color, renderingMode: .alwaysTemplate).withRenderingMode(.alwaysOriginal)
+            if #available(iOS 16.0, *) {
+                image = UIImage(systemName: "circle.fill")!.withTintColor(color, renderingMode: .alwaysTemplate).withRenderingMode(.alwaysOriginal)
+            } else {
+                image = UIGraphicsImageRenderer(size: CGSize(width: 20, height: 20)).image { context in
+                    color.setFill()
+                    context.cgContext.fillEllipse(in: CGRect(x: 0, y: 0, width: 20, height: 20))
+                }
+            }
         }
         return (color, image)
     }

Tusker/Screens/Preferences/Notifications/NotificationsPrefsView.swift

@@ -36,7 +36,12 @@ struct NotificationsPrefsView: View {
             if #available(iOS 15.4, *) {
                 Section {
                     Button {
-                        if let url = URL(string: UIApplication.openNotificationSettingsURLString) {
+                        let str = if #available(iOS 16.0, *) {
+                            UIApplication.openNotificationSettingsURLString
+                        } else {
+                            UIApplicationOpenNotificationSettingsURLString
+                        }
+                        if let url = URL(string: str) {
                             UIApplication.shared.open(url)
                         }
                     } label: {

Tusker/Screens/Preferences/Notifications/PushInstanceSettingsView.swift

@@ -34,7 +34,7 @@ struct PushInstanceSettingsView: View {
             HStack {
                 PrefsAccountView(account: account)
                 Spacer()
-                AsyncToggle("\(account.instanceURL.host!) notifications enabled", mode: $mode, onChange: updateNotificationsEnabled(enabled:))
+                AsyncToggle("\(account.instanceURL.host!) notifications enabled", labelHidden: true, mode: $mode, onChange: updateNotificationsEnabled(enabled:))
                     .labelsHidden()
             }
             PushSubscriptionView(account: account, mastodonController: mastodonController, subscription: subscription, updateSubscription: updateSubscription)

Tusker/Screens/Preferences/OppositeCollapseKeywordsView.swift

@@ -43,9 +43,21 @@ struct OppositeCollapseKeywordsView: View {
             .listStyle(.grouped)
             .appGroupedListBackground(container: PreferencesNavigationController.self)
         }
+        #if !os(visionOS)
+        .onAppear(perform: updateAppearance)
+        #endif
         .navigationBarTitle(preferences.expandAllContentWarnings ? "Collapse Post CW Keywords" : "Expand Post CW Keywords")
     }
     
+    @available(iOS, obsoleted: 16.0)
+    private func updateAppearance() {
+        if #available(iOS 16.0, *) {
+            // no longer necessary
+        } else {
+            UIScrollView.appearance(whenContainedInInstancesOf: [PreferencesNavigationController.self]).keyboardDismissMode = .interactive
+        }
+    }
+    
     private func commitExisting(at index: Int) -> () -> Void {
         return {
             if keywords[index].value.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {

Tusker/Screens/Profile/ProfileViewController.swift

@@ -393,3 +393,9 @@ extension ProfileViewController: StatusBarTappableViewController {
         return currentViewController.handleStatusBarTapped(xPosition: xPosition)
     }
 }
+
+extension ProfileViewController: RefreshableViewController {
+    func refresh() {
+        currentViewController.refresh()
+    }
+}

Tusker/Screens/Report/ReportAddStatusView.swift

@@ -69,30 +69,34 @@ private struct ScrollBackgroundModifier: ViewModifier {
     @Environment(\.colorScheme) private var colorScheme
     
     func body(content: Content) -> some View {
-        content
-            .scrollContentBackground(.hidden)
-            .background {
-                // otherwise the pureBlackDarkMode isn't propagated, for some reason?
-                // even though it is for ReportSelectRulesView??
-                let traits: UITraitCollection = {
-                    var t = UITraitCollection(userInterfaceStyle: colorScheme == .dark ? .dark : .light)
-                    #if os(visionOS)
-                    t = t.modifyingTraits({ mutableTraits in
-                        mutableTraits.pureBlackDarkMode = true
-                    })
-                    #else
-                    if #available(iOS 17.0, *) {
+        if #available(iOS 16.0, *) {
+            content
+                .scrollContentBackground(.hidden)
+                .background {
+                    // otherwise the pureBlackDarkMode isn't propagated, for some reason?
+                    // even though it is for ReportSelectRulesView??
+                    let traits: UITraitCollection = {
+                        var t = UITraitCollection(userInterfaceStyle: colorScheme == .dark ? .dark : .light)
+                        #if os(visionOS)
                         t = t.modifyingTraits({ mutableTraits in
                             mutableTraits.pureBlackDarkMode = true
                         })
-                    } else {
-                        t.obsoletePureBlackDarkMode = true
-                    }
-                    #endif
-                    return t
-                }()
-                Color(uiColor: .appGroupedBackground.resolvedColor(with: traits))
-                    .edgesIgnoringSafeArea(.all)
-            }
+                        #else
+                        if #available(iOS 17.0, *) {
+                            t = t.modifyingTraits({ mutableTraits in
+                                mutableTraits.pureBlackDarkMode = true
+                            })
+                        } else {
+                            t.obsoletePureBlackDarkMode = true
+                        }
+                        #endif
+                        return t
+                    }()
+                    Color(uiColor: .appGroupedBackground.resolvedColor(with: traits))
+                        .edgesIgnoringSafeArea(.all)
+                }
+        } else {
+            content
+        }
     }
 }

Tusker/Screens/Report/ReportSelectRulesView.swift

@@ -49,12 +49,26 @@ struct ReportSelectRulesView: View {
             }
             .appGroupedListRowBackground()
         }
-        .scrollContentBackground(.hidden)
-        .background(Color.appGroupedBackground)
+        .withAppBackgroundIfAvailable()
         .navigationTitle("Rules")
     }
 }
 
+private extension View {
+    @available(iOS, obsoleted: 16.0)
+    @available(visionOS 1.0, *)
+    @ViewBuilder
+    func withAppBackgroundIfAvailable() -> some View {
+        if #available(iOS 16.0, *) {
+            self
+                .scrollContentBackground(.hidden)
+                .background(Color.appGroupedBackground)
+        } else {
+            self
+        }
+    }
+}
+
 //struct ReportSelectRulesView_Previews: PreviewProvider {
 //    static var previews: some View {
 //        ReportSelectRulesView()

Tusker/Screens/Report/ReportView.swift

@@ -27,11 +27,18 @@ struct ReportView: View {
     }
     
     var body: some View {
-        NavigationStack {
-            navigationViewContent
-                #if !os(visionOS)
-                .scrollDismissesKeyboard(.interactively)
-                #endif
+        if #available(iOS 16.0, *) {
+            NavigationStack {
+                navigationViewContent
+                    #if !os(visionOS)
+                    .scrollDismissesKeyboard(.interactively)
+                    #endif
+            }
+        } else {
+            NavigationView {
+                navigationViewContent
+            }
+            .navigationViewStyle(.stack)
         }
     }
     

Tusker/Screens/Search/MastodonSearchController.swift

@@ -39,7 +39,9 @@ class MastodonSearchController: UISearchController {
         searchResultsUpdater = searchResultsController
         automaticallyShowsSearchResultsController = false
         showsSearchResultsController = true
-        scopeBarActivation = .onSearchActivation
+        if #available(iOS 16.0, *) {
+            scopeBarActivation = .onSearchActivation
+        }
         
         searchBar.autocapitalizationType = .none
         searchBar.delegate = self
@@ -76,8 +78,12 @@ class MastodonSearchController: UISearchController {
         if searchText != defaultLanguage,
            let match = languageRegex.firstMatch(in: searchText, range: NSRange(location: 0, length: searchText.utf16.count)) {
             let identifier = (searchText as NSString).substring(with: match.range(at: 1))
-            if Locale.LanguageCode.isoLanguageCodes.contains(where: { $0.identifier == identifier }) {
-                langSuggestions.append("language:\(identifier)")
+            if #available(iOS 16.0, *) {
+                if Locale.LanguageCode.isoLanguageCodes.contains(where: { $0.identifier == identifier }) {
+                    langSuggestions.append("language:\(identifier)")
+                }
+            } else if searchText != "en" {
+                langSuggestions.append("language:\(searchText)")
             }
         }
         suggestions.append((.language, langSuggestions))

Tusker/Screens/Timeline/InstanceTimelineViewController.swift

@@ -77,11 +77,25 @@ class InstanceTimelineViewController: TimelineViewController {
         cell.updateUI(statusID: id, state: state, filterResult: filterResult, precomputedContent: precomputedContent)
     }
     
+    override func collectionView(_ collectionView: UICollectionView, shouldSelectItemAt indexPath: IndexPath) -> Bool {
+        guard browsingEnabled else {
+            return false
+        }
+        return super.collectionView(collectionView, shouldSelectItemAt: indexPath)
+    }
+    
     override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
         guard browsingEnabled else { return }
         super.collectionView(collectionView, didSelectItemAt: indexPath)
     }
     
+    override func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
+        guard browsingEnabled else {
+            return nil
+        }
+        return super.collectionView(collectionView, contextMenuConfigurationForItemAt: indexPath, point: point)
+    }
+    
     // MARK: Timeline
     
     override func handleLoadAllError(_ error: Swift.Error) async {

Tusker/Screens/Timeline/TimelinesPageViewController.swift

@@ -212,3 +212,9 @@ extension TimelinesPageViewController: StateRestorableViewController {
         return (currentViewController as? TimelineViewController)?.stateRestorationActivity()
     }
 }
+
+extension TimelinesPageViewController: RefreshableViewController {
+    func refresh() {
+        (currentViewController as? RefreshableViewController)?.refresh()
+    }
+}

Tusker/Screens/Utilities/EnhancedNavigationViewController.swift

@@ -22,7 +22,8 @@ class EnhancedNavigationViewController: UINavigationController {
     override var viewControllers: [UIViewController] {
         didSet {
             poppedViewControllers = []
-            if useBrowserStyleNavigation {
+            if #available(iOS 16.0, *),
+               useBrowserStyleNavigation {
                 // TODO: this for loop might not be necessary
                 for vc in viewControllers {
                     configureNavItem(vc.navigationItem)
@@ -39,7 +40,8 @@ class EnhancedNavigationViewController: UINavigationController {
         self.interactivePushTransition = InteractivePushTransition(navigationController: self)
         #endif
         
-        if useBrowserStyleNavigation,
+        if #available(iOS 16.0, *),
+           useBrowserStyleNavigation,
            let topViewController {
             configureNavItem(topViewController.navigationItem)
             updateTopNavItemState()
@@ -50,7 +52,9 @@ class EnhancedNavigationViewController: UINavigationController {
         let popped = performAfterAnimating(block: {
             super.popViewController(animated: animated)
         }, after: {
-            self.updateTopNavItemState()
+            if #available(iOS 16.0, *) {
+                self.updateTopNavItemState()
+            }
         }, animated: animated)
         if let popped {
             poppedViewControllers.insert(popped, at: 0)
@@ -62,7 +66,9 @@ class EnhancedNavigationViewController: UINavigationController {
         let popped = performAfterAnimating(block: {
             super.popToRootViewController(animated: animated)
         }, after: {
-            self.updateTopNavItemState()
+            if #available(iOS 16.0, *) {
+                self.updateTopNavItemState()
+            }
         }, animated: animated)
         if let popped {
             poppedViewControllers = popped
@@ -74,7 +80,9 @@ class EnhancedNavigationViewController: UINavigationController {
         let popped = performAfterAnimating(block: {
             super.popToViewController(viewController, animated: animated)
         }, after: {
-            self.updateTopNavItemState()
+            if #available(iOS 16.0, *) {
+                self.updateTopNavItemState()
+            }
         }, animated: animated)
         if let popped {
             poppedViewControllers.insert(contentsOf: popped, at: 0)
@@ -89,11 +97,15 @@ class EnhancedNavigationViewController: UINavigationController {
             self.poppedViewControllers = []
         }
         
-        configureNavItem(viewController.navigationItem)
+        if #available(iOS 16.0, *) {
+            configureNavItem(viewController.navigationItem)
+        }
         
         super.pushViewController(viewController, animated: animated)
         
-        updateTopNavItemState()
+        if #available(iOS 16.0, *) {
+            updateTopNavItemState()
+        }
     }
     
     func pushPoppedViewController() {
@@ -123,7 +135,9 @@ class EnhancedNavigationViewController: UINavigationController {
             pushViewController(target, animated: true)
         }, after: {
             self.viewControllers.insert(contentsOf: toInsert, at: self.viewControllers.count - 1)
-            self.updateTopNavItemState()
+            if #available(iOS 16.0, *) {
+                self.updateTopNavItemState()
+            }
         }, animated: true)
     }
     

Tusker/Screens/Utilities/Previewing.swift

@@ -204,7 +204,8 @@ extension MenuActionProvider {
             }),
         ]
         
-        if includeStatusButtonActions {
+        if #available(iOS 16.0, *),
+           includeStatusButtonActions {
             let favorited = status.favourited
             // TODO: move this color into an asset catalog or something
             var favImage = UIImage(systemName: favorited ? "star.fill" : "star")!
@@ -367,11 +368,19 @@ extension MenuActionProvider {
         
         addOpenInNewWindow(actions: &shareSection, activity: UserActivityManager.showConversationActivity(mainStatusID: status.id, accountID: accountID))
         
-        let toggleableAndActions = toggleableSection + actionsSection
-        return [
-            UIMenu(options: .displayInline, preferredElementSize: toggleableAndActions.count == 1 ? .large : .medium, children: toggleableAndActions),
-            UIMenu(options: .displayInline, children: shareSection),
-        ]
+        if #available(iOS 16.0, *) {
+            let toggleableAndActions = toggleableSection + actionsSection
+            return [
+                UIMenu(options: .displayInline, preferredElementSize: toggleableAndActions.count == 1 ? .large : .medium, children: toggleableAndActions),
+                UIMenu(options: .displayInline, children: shareSection),
+            ]
+        } else {
+            return [
+                UIMenu(options: .displayInline, children: shareSection),
+                UIMenu(options: .displayInline, children: toggleableSection),
+                UIMenu(options: .displayInline, children: actionsSection),
+            ]
+        }
     }
     
     func actionsForTrendingLink(card: Card, source: PopoverSource) -> [UIMenuElement] {

Tusker/Shortcuts/UserActivityHandlingContext.swift

@@ -108,7 +108,8 @@ class StateRestorationUserActivityHandlingContext: UserActivityHandlingContext {
     }
     
     func compose(editing draft: Draft) {
-        if UIDevice.current.userInterfaceIdiom == .phone {
+        if #available(iOS 16.0, *),
+           UIDevice.current.userInterfaceIdiom == .phone {
             self.root.compose(editing: draft, animated: false, isDucked: true, completion: nil)
         } else {
             DispatchQueue.main.async {
@@ -122,7 +123,8 @@ class StateRestorationUserActivityHandlingContext: UserActivityHandlingContext {
         precondition(state > .initial)
         navigation.run()
         #if !os(visionOS)
-        if let duckedDraft = UserActivityManager.getDuckedDraft(from: activity) {
+        if #available(iOS 16.0, *),
+           let duckedDraft = UserActivityManager.getDuckedDraft(from: activity) {
             self.root.compose(editing: duckedDraft, animated: false, isDucked: true, completion: nil)
         }
         #endif

Tusker/TuskerNavigationDelegate.swift

@@ -114,7 +114,8 @@ extension TuskerNavigationDelegate {
             #if os(visionOS)
             fatalError("unreachable")
             #else
-            if presentDuckable(compose, animated: animated, isDucked: isDucked, completion: completion) {
+            if #available(iOS 16.0, *),
+               presentDuckable(compose, animated: animated, isDucked: isDucked, completion: completion) {
                 return
             } else {
                 present(compose, animated: animated, completion: completion)

Tusker/Views/AccountDisplayAndUserNameLabel.swift

@@ -30,7 +30,9 @@ class AccountDisplayAndUserNameLabel: EmojiLabel {
     
     private func makeAttributedText(state: State) -> NSAttributedString {
         let s = NSMutableAttributedString()
-        s.append(NSAttributedString(string: state.displayName, attributes: [
+        // U+2068 FIRST-STRONG ISOLATE and U+2069 POP DIRECTIONAL ISOLATE
+        // to prevent bidi text in the display name influencing the username
+        s.append(NSAttributedString(string: "\u{2068}\(state.displayName)\u{2069}", attributes: [
             .font: UIFont(descriptor: baseFont.addingAttributes([
                 .traits: [
                     UIFontDescriptor.TraitKey.weight: UIFont.Weight.semibold.rawValue,

Tusker/Views/AccountDisplayNameView.swift

@@ -9,7 +9,6 @@
 import SwiftUI
 import Pachyderm
 import WebURLFoundationExtras
-import os
 
 private let emojiRegex = try! NSRegularExpression(pattern: ":(\\w+):", options: [])
 
@@ -41,7 +40,7 @@ struct AccountDisplayNameView: View {
         guard !matches.isEmpty else { return }
         
         let emojiSize = self.emojiSize
-        let emojiImages = OSAllocatedUnfairLock(initialState: [String: Image]())
+        let emojiImages = MultiThreadDictionary<String, Image>()
         
         let group = DispatchGroup()
         
@@ -64,9 +63,7 @@ struct AccountDisplayNameView: View {
                     image.draw(in: CGRect(origin: .zero, size: size))
                 }
                 
-                emojiImages.withLock {
-                    $0[emoji.shortcode] = Image(uiImage: resized)
-                }
+                emojiImages[emoji.shortcode] = Image(uiImage: resized)
             }
             if let request = request {
                 emojiRequests.append(request)
@@ -81,7 +78,7 @@ struct AccountDisplayNameView: View {
             // iterate backwards as to not alter the indices of earlier matches
             for match in matches.reversed() {
                 let shortcode = (account.displayName as NSString).substring(with: match.range(at: 1))
-                guard let image = emojiImages.withLock({ $0[shortcode] }) else { continue }
+                guard let image = emojiImages[shortcode] else { continue }
                 
                 let afterCurrentMatch = (account.displayName as NSString).substring(with: NSRange(location: match.range.upperBound, length: endIndex - match.range.upperBound))
                 

Tusker/Views/Attachments/AttachmentView.swift

@@ -263,7 +263,17 @@ class AttachmentView: GIFImageView {
             let asset = AVURLAsset(url: attachment.url)
             let generator = AVAssetImageGenerator(asset: asset)
             generator.appliesPreferredTrackTransform = true
-            guard let image = try? await generator.image(at: .zero).image,
+            let image: CGImage?
+            #if os(visionOS)
+            image = try? await generator.image(at: .zero).image
+            #else
+            if #available(iOS 16.0, *) {
+                image = try? await generator.image(at: .zero).image
+            } else {
+                image = try? generator.copyCGImage(at: .zero, actualTime: nil)
+            }
+            #endif
+            guard let image,
                   let prepared = await UIImage(cgImage: image).byPreparingForDisplay(),
                   !Task.isCancelled else {
                 return
@@ -402,7 +412,7 @@ class AttachmentView: GIFImageView {
             makeBadgeView(text: "ALT")
         }
         if badges.contains(.noAlt) {
-            makeBadgeView(text: "No ALT")
+            makeBadgeView(text: "NO ALT")
         }
         
         let first = stack.arrangedSubviews.first!
@@ -467,12 +477,12 @@ extension AttachmentView: UIContextMenuInteractionDelegate {
         return UIContextMenuConfiguration { [unowned self] () -> UIViewController? in
             if self.attachment.kind == .image,
                let image {
-                return ImageGalleryContentViewController(url: self.attachment.url, caption: nil, originalData: nil, image: image, gifController: self.gifController)
+                return GrayscalableImageGalleryContentViewController(url: self.attachment.url, caption: nil, originalData: nil, image: image, gifController: self.gifController)
             } else if self.attachment.kind == .gifv,
                       let gifvView {
                 return GifvGalleryContentViewController(controller: gifvView.controller, url: self.attachment.url, caption: nil)
             } else if self.attachment.kind == .video || self.attachment.kind == .audio {
-                let vc = VideoGalleryContentViewController(url: self.attachment.url, caption: nil)
+                let vc = GrayscalableVideoGalleryContentViewController(url: self.attachment.url, caption: nil)
                 vc.player.isMuted = true
                 return vc
             } else {

Tusker/Views/Attachments/AttachmentsContainerView.swift

@@ -295,7 +295,11 @@ class AttachmentsContainerView: UIView {
                 accessibilityElements.append(moreView)
             }
             
-            self.aspectRatio = aspectRatio
+            self.aspectRatio = if aspectRatio.isNaN || aspectRatio.isInfinite {
+                16/9
+            } else {
+                aspectRatio
+            }
         } else {
             self.isHidden = true
         }

Tusker/Views/Attachments/GifvController.swift

@@ -60,9 +60,9 @@ class GifvController {
     }
     
     private func updatePresentationSizeObservation() {
-        presentationSizeObservation = item.observe(\.presentationSize, changeHandler: { [unowned self] item, _ in
+        presentationSizeObservation = item.observe(\.presentationSize, changeHandler: { [weak self] item, _ in
             DispatchQueue.main.async {
-                self.presentationSizeSubject.send(item.presentationSize)
+                self?.presentationSizeSubject.send(item.presentationSize)
             }
         })
     }

Tusker/Views/BaseEmojiLabel.swift

@@ -9,7 +9,6 @@
 import UIKit
 import Pachyderm
 import WebURLFoundationExtras
-import os
 
 private let emojiRegex = try! NSRegularExpression(pattern: ":(\\w+):", options: [])
 
@@ -57,7 +56,7 @@ extension BaseEmojiLabel {
             return imageSizeMatchingFontSize
         }
         
-        let emojiImages = OSAllocatedUnfairLock(initialState: [String: UIImage]())
+        let emojiImages = MultiThreadDictionary<String, UIImage>()
         var foundEmojis = false
         
         let group = DispatchGroup()
@@ -80,11 +79,9 @@ extension BaseEmojiLabel {
                 // todo: consider caching these somewhere? the cache needs to take into account both the url and the font size, which may vary across labels, so can't just use ImageCache
                 if let thumbnail = image.preparingThumbnail(of: emojiImageSize(image)),
                    let cgImage = thumbnail.cgImage {
-                    emojiImages.withLock {
-                        // the thumbnail API takes a pixel size and returns an image with scale 1, but we want the actual screen scale, so convert
-                        // see FB12187798
-                        $0[emoji.shortcode] = UIImage(cgImage: cgImage, scale: screenScale, orientation: .up)
-                    }
+                    // the thumbnail API takes a pixel size and returns an image with scale 1, but we want the actual screen scale, so convert
+                    // see FB12187798
+                    emojiImages[emoji.shortcode] = UIImage(cgImage: cgImage, scale: screenScale, orientation: .up)
                 }
             } else {
                 // otherwise, perform the network request
@@ -102,9 +99,7 @@ extension BaseEmojiLabel {
                             group.leave()
                             return
                         }
-                        emojiImages.withLock {
-                            $0[emoji.shortcode] = transformedImage
-                        }
+                        emojiImages[emoji.shortcode] = transformedImage
                         group.leave()
                     }
                 }

Tusker/Views/ContentTextView.swift

@@ -146,7 +146,8 @@ class ContentTextView: LinkTextView, BaseEmojiLabel {
 
     func getLinkAtPoint(_ point: CGPoint) -> (URL, NSRange)? {
         let locationInTextContainer = CGPoint(x: point.x - textContainerInset.left, y: point.y - textContainerInset.top)
-        if let textLayoutManager {
+        if #available(iOS 16.0, *),
+           let textLayoutManager {
             guard let fragment = textLayoutManager.textLayoutFragment(for: locationInTextContainer) else {
                 return nil
             }
@@ -304,7 +305,8 @@ extension ContentTextView: UIContextMenuInteractionDelegate {
         
         // Determine the line rects that the link takes up in the coordinate space of this view.
         var rects = [CGRect]()
-        if let textLayoutManager,
+        if #available(iOS 16.0, *),
+           let textLayoutManager,
            let contentManager = textLayoutManager.textContentManager {
             // convert from NSRange to NSTextRange
             // i have no idea under what circumstances any of these calls could fail

Tusker/Views/CopyableLable.swift

@@ -1,5 +1,5 @@
 //
-//  CopyableLabel.swift
+//  CopyableLable.swift
 //  Tusker
 //
 //  Created by Shadowfacts on 2/4/23.
@@ -8,7 +8,7 @@
 
 import UIKit
 
-class CopyableLabel: UILabel {
+class CopyableLable: UILabel {
     
     private var _editMenuInteraction: Any!
     @available(iOS 16.0, *)
@@ -28,10 +28,12 @@ class CopyableLabel: UILabel {
     }
     
     private func commonInit() {
-        editMenuInteraction = UIEditMenuInteraction(delegate: nil)
-        addInteraction(editMenuInteraction)
-        isUserInteractionEnabled = true
-        addGestureRecognizer(UILongPressGestureRecognizer(target: self, action: #selector(longPressed)))
+        if #available(iOS 16.0, *) {
+            editMenuInteraction = UIEditMenuInteraction(delegate: nil)
+            addInteraction(editMenuInteraction)
+            isUserInteractionEnabled = true
+            addGestureRecognizer(UILongPressGestureRecognizer(target: self, action: #selector(longPressed)))
+        }
     }
     
     override func copy(_ sender: Any?) {

Tusker/Views/Instance Cell/InstanceTableViewCell.swift

@@ -16,8 +16,7 @@ class InstanceTableViewCell: UITableViewCell {
     @IBOutlet weak var adultLabel: UILabel!
     @IBOutlet weak var descriptionTextView: ContentTextView!
     
-    var instance: InstanceV1?
-    var selectorInstance: InstanceSelector.Instance?
+    private var instance: InstanceSelectorTableViewController.Info?
     
     private var thumbnailTask: Task<Void, Never>?
     
@@ -44,25 +43,14 @@ class InstanceTableViewCell: UITableViewCell {
         backgroundConfiguration = .appListGroupedCell(for: state)
     }
     
-    func updateUI(instance: InstanceSelector.Instance) {
-        self.selectorInstance = instance
-        self.instance = nil
-        
-        domainLabel.text = instance.domain
-        adultLabel.isHidden = instance.category != "adult"
-        descriptionTextView.setBodyTextFromHTML(instance.description)
-        updateThumbnail(url: instance.proxiedThumbnailURL)
-    }
-    
-    func updateUI(instance: InstanceV1) {
-        self.instance = instance
-        self.selectorInstance = nil
+    func updateUI(info: InstanceSelectorTableViewController.Info) {
+        self.instance = info
 
-        domainLabel.text = URLComponents(string: instance.uri)?.host ?? instance.uri
-        adultLabel.isHidden = true
-        descriptionTextView.setBodyTextFromHTML(instance.shortDescription ?? instance.description)
+        domainLabel.text = info.host
+        adultLabel.isHidden = !info.adult
+        descriptionTextView.setBodyTextFromHTML(info.description)
         
-        if let thumbnail = instance.thumbnail {
+        if let thumbnail = info.thumbnail {
             updateThumbnail(url: thumbnail)
         } else {
             thumbnailImageView.image = nil
@@ -85,7 +73,6 @@ class InstanceTableViewCell: UITableViewCell {
         
         thumbnailTask?.cancel()
         instance = nil
-        selectorInstance = nil
     }
 
 }