Remove pre-iOS 16 code

Packages/ComposeUI/Sources/ComposeUI/ComposeInput.swift

@@ -30,20 +30,14 @@ enum ToolbarElement {
 }
 
 private struct FocusedComposeInput: FocusedValueKey {
-    typealias Value = (any ComposeInput)?
+    typealias Value = any ComposeInput
 }
 
 extension FocusedValues {
-    // This double optional is unfortunate, but avoiding it requires iOS 16 API
+    var composeInput: (any ComposeInput)? {
-    fileprivate var _composeInput: (any ComposeInput)?? {
         get { self[FocusedComposeInput.self] }
         set { self[FocusedComposeInput.self] = newValue }
     }
-    
-    var composeInput: (any ComposeInput)? {
-        get { _composeInput ?? nil }
-        set { _composeInput = newValue }
-    }
 }
 
 @propertyWrapper
@@ -72,6 +66,6 @@ struct FocusedInputModifier: ViewModifier {
     func body(content: Content) -> some View {
         content
             .environment(\.composeInputBox, box)
-            .focusedValue(\._composeInput, box.wrappedValue)
+            .focusedValue(\.composeInput, box.wrappedValue)
     }
 }

Packages/ComposeUI/Sources/ComposeUI/Views/AttachmentsListView.swift

@@ -28,93 +28,12 @@ struct AttachmentsListView: View {
     }
     
     var body: some View {
-        if #available(iOS 16.0, *) {
         WrappedCollectionView(attachments: draft.draftAttachments, hasPoll: draft.poll != nil, callbacks: callbacks, canAddAttachment: canAddAttachment)
             // Impose a minimum height, because otherwise it defaults to zero which prevents the collection
             // view from laying out, and leaving the intrinsic content size at zero too.
             .frame(minHeight: 50)
             .padding(.horizontal, -8)
-        } else {
-            LegacyAttachmentsList(draft: draft, callbacks: callbacks, canAddAttachment: canAddAttachment)
     }
-    }
-}
-
-@available(iOS, obsoleted: 16.0)
-private struct LegacyAttachmentsList: View {
-    @ObservedObject var draft: Draft
-    let callbacks: Callbacks
-    let canAddAttachment: Bool
-    @State private var attachmentHeights = [NSManagedObjectID: CGFloat]()
-    
-    private var totalHeight: CGFloat {
-        let buttonsHeight = 3 * (40 + AttachmentsListPaddingModifier.cellPadding)
-        let rowHeights = draft.attachments.compactMap {
-            attachmentHeights[($0 as! NSManagedObject).objectID]
-        }.reduce(0) { partialResult, height in
-            partialResult + height + AttachmentsListPaddingModifier.cellPadding
-        }
-        return buttonsHeight + rowHeights
-    }
-
-    var body: some View {
-        List {
-            content
-        }
-        .listStyle(.plain)
-        .frame(height: totalHeight)
-        .scrollDisabledIfAvailable(true)
-    }
-    
-    @ViewBuilder
-    private var content: some View {
-        ForEach(draft.draftAttachments) { attachment in
-            AttachmentRowView(attachment: attachment)
-                .modifier(AttachmentRowHeightModifier(height: $attachmentHeights[attachment.objectID]))
-        }
-        .onMove(perform: self.moveAttachments)
-        .onDelete(perform: self.removeAttachments)
-        
-        AddPhotoButton(canAddAttachment: canAddAttachment, draft: draft, insertAttachments: self.insertAttachments)
-        
-        AddDrawingButton(canAddAttachment: canAddAttachment)
-        
-        TogglePollButton(poll: draft.poll)
-    }
-    
-    // TODO: move this to Callbacks
-    private func insertAttachments(at offset: Int, itemProviders: [NSItemProvider]) {
-        for provider in itemProviders where provider.canLoadObject(ofClass: DraftAttachment.self) {
-            provider.loadObject(ofClass: DraftAttachment.self) { object, error in
-                guard let attachment = object as? DraftAttachment else { return }
-                DispatchQueue.main.async {
-                    guard self.canAddAttachment else {
-                        return
-                    }
-                    DraftsPersistentContainer.shared.viewContext.insert(attachment)
-                    attachment.draft = self.draft
-                    self.draft.attachments.add(attachment)
-                }
-            }
-        }
-    }
-    
-    // TODO: move this to Callbacks
-    private func moveAttachments(from source: IndexSet, to destination: Int) {
-        // just using moveObjects(at:to:) on the draft.attachments NSMutableOrderedSet
-        // results in the order switching back to the previous order and then to the correct one
-        // on the subsequent 2 view updates. creating a new set with the proper order doesn't have that problem
-        var array = draft.draftAttachments
-        array.move(fromOffsets: source, toOffset: destination)
-        draft.attachments = NSMutableOrderedSet(array: array)
-    }
-
-    private func removeAttachments(at indices: IndexSet) {
-        for index in indices {
-            callbacks.removeAttachment(at: index)
-        }
-    }
-
 }
 
 private struct Callbacks {
@@ -157,104 +76,6 @@ private struct Callbacks {
     }
 }
 
-private struct AttachmentRowHeightPreferenceKey: PreferenceKey {
-    static var defaultValue: CGFloat { 0 }
-    static func reduce(value: inout CGFloat, nextValue: () -> CGFloat) {
-        value = nextValue()
-    }
-}
-
-private struct AttachmentRowHeightModifier: ViewModifier {
-    @Binding var height: CGFloat?
-    
-    func body(content: Content) -> some View {
-        content
-            .background {
-                GeometryReader { proxy in
-                    Color.clear
-                        // do the preference dance because onChange(of:inital:_:) is iOS 17+ :/
-                        .preference(key: AttachmentRowHeightPreferenceKey.self, value: proxy.size.height)
-                        .onPreferenceChange(AttachmentRowHeightPreferenceKey.self) { newValue in
-                            height = newValue
-                        }
-                }
-            }
-    }
-}
-
-private struct AttachmentsListPaddingModifier: ViewModifier {
-    static let cellPadding: CGFloat = 12
-    
-    func body(content: Content) -> some View {
-        content
-            .listRowInsets(EdgeInsets(top: Self.cellPadding / 2, leading: Self.cellPadding / 2, bottom: Self.cellPadding / 2, trailing: Self.cellPadding / 2))
-    }
-}
-
-private struct AttachmentsListButton<Label: View>: View {
-    let action: () -> Void
-    @ViewBuilder let label: Label
-    
-    var body: some View {
-        Button(action: action) {
-            label
-        }
-        .foregroundStyle(.tint)
-        .frame(height: 40)
-        .modifier(AttachmentsListPaddingModifier())
-    }
-}
-
-private struct AddPhotoButton: View {
-    let canAddAttachment: Bool
-    let draft: Draft
-    let insertAttachments: (Int, [NSItemProvider]) -> Void
-    @Environment(\.colorScheme) private var colorScheme
-    @Environment(\.composeUIConfig.presentAssetPicker) private var presentAssetPicker
-    
-    var body: some View {
-        AttachmentsListButton {
-            presentAssetPicker?() { results in
-                insertAttachments(draft.attachments.count, results.map(\.itemProvider))
-            }
-        } label: {
-            Label("Add photo or video", systemImage: colorScheme == .dark ? "photo.fill" : "photo")
-        }
-        .disabled(!canAddAttachment)
-    }
-}
-
-private struct AddDrawingButton: View {
-    let canAddAttachment: Bool
-
-    var body: some View {
-        AttachmentsListButton {
-            fatalError("TODO")
-        } label: {
-            Label("Draw something", systemImage: "hand.draw")
-        }
-        .disabled(!canAddAttachment)
-    }
-}
-
-private struct TogglePollButton: View {
-    let poll: Poll?
-    
-    var canAddPoll: Bool {
-        // TODO
-        true
-    }
-    
-    var body: some View {
-        AttachmentsListButton {
-            fatalError("TODO")
-        } label: {
-            Label(poll == nil ? "Add a poll" : "Remove poll", systemImage: "chart.bar.doc.horizontal")
-        }
-        .disabled(!canAddPoll)
-    }
-}
-
 @available(iOS 16.0, *)
 private struct WrappedCollectionView: UIViewRepresentable {
     let attachments: [DraftAttachment]

Packages/ComposeUI/Sources/ComposeUI/Views/ComposeToolbarView.swift

@@ -41,7 +41,7 @@ struct ComposeToolbarView: View {
             
             VisibilityButton(draft: draft, instanceFeatures: mastodonController.instanceFeatures)
             
-            LocalOnlyButton(enabled: $draft.contentWarningEnabled, mastodonController: mastodonController)
+            LocalOnlyButton(enabled: $draft.localOnly, mastodonController: mastodonController)
             
             InsertEmojiButton()
             
@@ -74,7 +74,7 @@ private struct ToolbarScrollView<Content: View>: View {
                     }
                 }
         }
-        .scrollDisabledIfAvailable(realWidth ?? 0 <= minWidth ?? 0)
+        .scrollDisabled(realWidth ?? 0 <= minWidth ?? 0)
         .frame(maxWidth: .infinity)
         .background {
             GeometryReader { proxy in
@@ -246,8 +246,7 @@ private struct LangaugeButton: View {
     @State private var hasChanged = false
     
     var body: some View {
-        if #available(iOS 16.0, *),
+        if instanceFeatures.createStatusWithLanguage {
-           instanceFeatures.createStatusWithLanguage {
             LanguagePicker(draftLanguage: $draft.language, hasChangedSelection: $hasChanged)
                 .onReceive(NotificationCenter.default.publisher(for: UITextInputMode.currentInputModeDidChangeNotification), perform: currentInputModeChanged)
                 .onChange(of: draft.id) { _ in

Packages/ComposeUI/Sources/ComposeUI/Views/ComposeView.swift

@@ -15,16 +15,9 @@ struct ComposeView: View {
     @EnvironmentObject private var controller: ComposeController
     
     var body: some View {
-        if #available(iOS 16.0, *) {
         NavigationStack {
             navigationRoot
         }
-        } else {
-            NavigationView {
-                navigationRoot
-            }
-            .navigationViewStyle(.stack)
-        }
     }
     
     private var navigationRoot: some View {
@@ -32,7 +25,7 @@ struct ComposeView: View {
             ScrollView(.vertical) {
                 scrollContent
             }
-            .scrollDismissesKeyboardInteractivelyIfAvailable()
+            .scrollDismissesKeyboard(.interactively)
             #if !os(visionOS) && !targetEnvironment(macCatalyst)
             .modifier(ToolbarSafeAreaInsetModifier())
             #endif

Packages/ComposeUI/Sources/ComposeUI/Views/NewMainTextView.swift

@@ -18,7 +18,6 @@ struct NewMainTextView: View {
         NewMainTextViewRepresentable(value: $value, becomeFirstResponder: $becomeFirstResponder)
             .focused($focusedField, equals: .body)
             .modifier(FocusedInputModifier())
-            .modifier(HeightExpandingModifier(minHeight: Self.minHeight))
             .overlay(alignment: .topLeading) {
                 if value.isEmpty {
                     PlaceholderView()
@@ -37,18 +36,10 @@ private struct NewMainTextViewRepresentable: UIViewRepresentable {
     @Environment(\.composeUIConfig.useTwitterKeyboard) private var useTwitterKeyboard
     // TODO: test textSelectionStartsAtBeginning
     @Environment(\.composeUIConfig.textSelectionStartsAtBeginning) private var textSelectionStartsAtBeginning
-    #if !os(visionOS)
-    @Environment(\.textViewContentHeight) @Binding private var textViewContentHeight
-    #endif
     
     func makeUIView(context: Context) -> UITextView {
-        let view: UITextView
         // TODO: if we're not doing the pill background, reevaluate whether this version fork is necessary
-        if #available(iOS 16.0, *) {
+        let view = WrappedTextView(usingTextLayoutManager: true)
-            view = WrappedTextView(usingTextLayoutManager: true)
-        } else {
-            view = WrappedTextView()
-        }
         view.delegate = context.coordinator
         view.adjustsFontForContentSizeCategory = true
         view.textContainer.lineBreakMode = .byWordWrapping
@@ -92,16 +83,6 @@ private struct NewMainTextViewRepresentable: UIViewRepresentable {
                 becomeFirstResponder = false
             }
         }
-        
-        #if !os(visionOS)
-        if #unavailable(iOS 16.0) {
-            DispatchQueue.main.async {
-                let targetSize = CGSize(width: uiView.bounds.width, height: UIView.layoutFittingCompressedSize.height)
-                let fittingSize = uiView.systemLayoutSizeFitting(targetSize, withHorizontalFittingPriority: .required, verticalFittingPriority: .defaultHigh)
-                textViewContentHeight = fittingSize.height
-            }
-        }
-        #endif
     }
     
     func makeCoordinator() -> WrappedTextViewCoordinator {
@@ -149,13 +130,8 @@ private final class WrappedTextViewCoordinator: NSObject {
         let str = NSMutableAttributedString(string: text)
         let mentionMatches = CharacterCounter.mention.matches(in: text, range: NSRange(location: 0, length: str.length))
         for match in mentionMatches.reversed() {
-            let range: NSRange
-            if #available(iOS 16.0, *) {
             str.insert(NSAttributedString(attachment: Self.attachment), at: match.range.location)
-                range = NSRange(location: match.range.location, length: match.range.length + 1)
+            let range = NSRange(location: match.range.location, length: match.range.length + 1)
-            } else {
-                range = match.range
-            }
             str.addAttributes([
                 .mention: true,
                 .foregroundColor: UIColor.tintColor,
@@ -199,7 +175,6 @@ private final class WrappedTextViewCoordinator: NSObject {
             // the attribute range should always be one greater than the match range, to account for the text attachment
             if attribute == nil || attributeRange.length <= match.range.length {
                 changed = true
-                if #available(iOS 16.0, *) {
                 let newAttributeRange: NSRange
                 if attribute == nil {
                     str.insert(NSAttributedString(attachment: Self.attachment), at: match.range.location)
@@ -211,9 +186,6 @@ private final class WrappedTextViewCoordinator: NSObject {
                     .mention: true,
                     .foregroundColor: UIColor.tintColor,
                 ], range: newAttributeRange)
-                } else {
-                    str.addAttribute(.foregroundColor, value: UIColor.tintColor, range: match.range)
-                }
             }
         }
         
@@ -276,38 +248,3 @@ private struct PlaceholderView: View {
             .allowsHitTesting(false)
     }
 }
-
-#if !os(visionOS)
-@available(iOS, obsoleted: 16.0)
-private struct HeightExpandingModifier: ViewModifier {
-    let minHeight: CGFloat
-    
-    @State private var height: CGFloat?
-    private var effectiveHeight: CGFloat {
-        height.map { max($0, minHeight) } ?? minHeight
-    }
-    
-    func body(content: Content) -> some View {
-        if #available(iOS 16.0, *) {
-            content
-        } else {
-            content
-                .frame(height: effectiveHeight)
-                .environment(\.textViewContentHeight, $height)
-        }
-    }
-}
-
-@available(iOS, obsoleted: 16.0)
-private struct TextViewContentHeightKey: EnvironmentKey {
-    static var defaultValue: Binding<CGFloat?> { .constant(nil) }
-}
-
-@available(iOS, obsoleted: 16.0)
-private extension EnvironmentValues {
-    var textViewContentHeight: Binding<CGFloat?> {
-        get { self[TextViewContentHeightKey.self] }
-        set { self[TextViewContentHeightKey.self] = newValue }
-    }
-}
-#endif