Adds further support for ShareLink

Author: shaps80

README.md

@@ -84,6 +84,7 @@ Environment:
 - `requestReview`
 - `Refreshable` – includes pull-to-refresh 
 - `ScaledMetric`
+- `ShareLink`
 - `StateObject`
 - `scrollDisabled`
 - `scrollDismissesKeyboard`

Sources/SwiftUIBackports/Internal/Inspect+UIKit.swift

@@ -1,13 +1,5 @@
 import SwiftUI
 
-#if os(iOS)
-internal typealias PlatformView = UIView
-internal typealias PlatformViewController = UIViewController
-#elseif os(macOS)
-internal typealias PlatformView = NSView
-internal typealias PlatformViewController = NSViewController
-#endif
-
 #if os(iOS) || os(macOS)
 internal extension PlatformView {
     func ancestor<ViewType: PlatformView>(ofType type: ViewType.Type) -> ViewType? {

Sources/SwiftUIBackports/Internal/OwningController.swift

@@ -22,9 +22,9 @@ import AppKit
 public extension NSView {
 
     var parentController: NSViewController? {
-        if let responder = self.next as? NSViewController {
+        if let responder = self.nextResponder as? NSViewController {
             return responder
-        } else if let responder = self.next as? NSView {
+        } else if let responder = self.nextResponder as? NSView {
             return responder.parentController
         } else {
             return nil

Sources/SwiftUIBackports/Internal/Platforms.swift

@@ -0,0 +1,19 @@
+#if os(iOS)
+
+import UIKit
+
+public typealias PlatformImage = UIImage
+
+internal typealias PlatformView = UIView
+internal typealias PlatformViewController = UIViewController
+
+#elseif os(macOS)
+
+import AppKit
+
+public typealias PlatformImage = NSImage
+
+internal typealias PlatformView = NSView
+internal typealias PlatformViewController = NSViewController
+
+#endif

Sources/SwiftUIBackports/Internal/String+LocalizationKey.swift

@@ -0,0 +1,12 @@
+import SwiftUI
+
+extension String {
+    internal init?(_ stringKey: LocalizedStringKey) {
+        guard let key = Mirror(reflecting: stringKey).children
+            .first(where: { $0.label == "key" })?.value as? String else {
+            return nil
+        }
+
+        self = NSLocalizedString(key, comment: "")
+    }
+}

Sources/SwiftUIBackports/Shared/Label/Label.swift

@@ -97,7 +97,7 @@ extension Backport where Wrapped == Any {
         }
 
         @MainActor public var body: some View {
-            if #available(iOS 14, *) {
+            if #available(iOS 14, macOS 11, *) {
                 SwiftUI.Label {
                     config.title
                 } icon: {

Sources/SwiftUIBackports/Shared/Label/Styles/DefaultLabelStyle.swift

@@ -19,11 +19,13 @@ extension Backport where Wrapped == Any {
                     IconOnlyLabelStyle().makeBody(configuration: configuration)
                 } else {
                     TitleAndIconLabelStyle().makeBody(configuration: configuration)
+                        #if os(iOS)
                         .inspect { inspector in
                             inspector.ancestor(ofType: UINavigationBar.self)
                         } customize: { _ in
                             isToolbarElement = true
                         }
+                        #endif
                 }
             }
         }

Sources/SwiftUIBackports/Shared/ShareLink/ActivityView.swift

@@ -2,6 +2,7 @@ import SwiftUI
 
 public struct DefaultShareLinkLabel: View {
     let text: Text
+    private static let shareIcon = "square.and.arrow.up"
 
     init() {
         text = .init("Share")
@@ -20,10 +21,25 @@ public struct DefaultShareLinkLabel: View {
     }
 
     public var body: some View {
-        Backport.Label {
-            text
-        } icon: {
-            Image(systemName: "square.and.arrow.up")
+        if #available(iOS 14, macOS 11, watchOS 7, tvOS 14, *) {
+            Label {
+                text
+            } icon: {
+                Image(systemName: Self.shareIcon)
+            }
+        } else {
+            Backport.Label {
+                text
+            } icon: {
+                #if os(macOS)
+                // no icon on earlier macOS versions
+                if #available(macOS 11, *) {
+                    Image(systemName: Self.shareIcon)
+                }
+                #else
+                Image(systemName: Self.shareIcon)
+                #endif
+            }
         }
     }
 }

Sources/SwiftUIBackports/Shared/ShareLink/DefaultShareLinkLabel.swift

@@ -0,0 +1,37 @@
+import SwiftUI
+
+@available(iOS, deprecated: 16)
+@available(macOS, deprecated: 13)
+@available(watchOS, deprecated: 9)
+@available(tvOS, unavailable)
+public extension Backport.ShareLink where Wrapped == Any {
+    init<S: StringProtocol>(_ title: S, items: Data, subject: String? = nil, message: String? = nil, preview: @escaping (Data.Element) -> SharePreview<PreviewImage, PreviewIcon>)
+    where Data.Element: BackportTransferable, Label == DefaultShareLinkLabel
+    {
+        self.label = .init(title)
+        self.data = items
+        self.subject = subject
+        self.message = message
+        self.preview = preview
+    }
+
+    init(_ titleKey: LocalizedStringKey, items: Data, subject: String? = nil, message: String? = nil, preview: @escaping (Data.Element) -> SharePreview<PreviewImage, PreviewIcon>)
+    where Data.Element: BackportTransferable, Label == DefaultShareLinkLabel
+    {
+        self.label = .init(titleKey)
+        self.data = items
+        self.subject = subject
+        self.message = message
+        self.preview = preview
+    }
+
+    init(_ title: Text, items: Data, subject: String? = nil, message: String? = nil, preview: @escaping (Data.Element) -> SharePreview<PreviewImage, PreviewIcon>)
+    where Data.Element: BackportTransferable, Label == DefaultShareLinkLabel
+    {
+        self.label = .init(title)
+        self.data = items
+        self.subject = subject
+        self.message = message
+        self.preview = preview
+    }
+}