Add time data source format style support

Sources/OpenSwiftUICore/Animation/Transition/ContentTransition.swift

@@ -350,6 +350,17 @@ public struct ContentTransition: Equatable, Sendable {
     /// system uses an opacity transition instead.
     public static let interpolate: ContentTransition = .init(storage: .named(.init())) // FIXME
 
+    public static func numericText(countsDown: Bool = false) -> ContentTransition {
+        // FIXME
+        .init(storage: .named(.init(name: .numericText(.init(direction: .fixed(downwards: countsDown))))))
+    }
+
+    @_spi(Private)
+    @available(*, deprecated, message: "replaced by numericText(countsDown:)")
+    public static func numericText(increasing: Bool) -> ContentTransition {
+        .numericText(countsDown: !increasing)
+    }
+
     // MARK: - ContentTransition.Options
 
     @_spi(Private)

Sources/OpenSwiftUICore/View/Text/FormatStyle/CalendarDependentFormatStyle.swift

@@ -0,0 +1,80 @@
+//
+//  CalendarDependentFormatStyle.swift
+//  OpenSwiftUICore
+//
+//  Audited for 6.5.4
+//  Status: Complete (Blocked by WhitespaceRemovingFormatStyle/SystemFormatStyle)
+//  ID: 26D279F2E8972E56094553A13FA39915 (SwiftUICore)
+
+package import Foundation
+
+protocol CalendarDependentFormatStyle: FormatStyle {
+    func withCalendar(_ calendar: Calendar) -> Self
+}
+
+extension FormatStyle {
+    package func calendar(_ calendar: Calendar) -> Self {
+        guard let style = self as? any CalendarDependentFormatStyle else {
+            return self
+        }
+        return style.withCalendar(calendar) as! Self
+    }
+}
+
+#if canImport(Darwin)
+@available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *)
+extension Date.FormatStyle: CalendarDependentFormatStyle {
+    func withCalendar(_ calendar: Calendar) -> Self {
+        var style = self
+        style.calendar = calendar
+        return style
+    }
+}
+
+@available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *)
+extension Date.VerbatimFormatStyle: CalendarDependentFormatStyle {
+    func withCalendar(_ calendar: Calendar) -> Self {
+        var style = self
+        style.calendar = calendar
+        return style
+    }
+}
+
+@available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *)
+extension Date.ComponentsFormatStyle: CalendarDependentFormatStyle {
+    func withCalendar(_ calendar: Calendar) -> Self {
+        self.calendar(calendar)
+    }
+}
+
+@available(macOS 15, iOS 18, tvOS 18, watchOS 11, *)
+extension Date.FormatStyle.Attributed: CalendarDependentFormatStyle {
+    func withCalendar(_ calendar: Calendar) -> Self {
+        var style = self
+        style[dynamicMember: \.calendar] = calendar
+        return style
+    }
+}
+
+@available(macOS 15, iOS 18, tvOS 18, watchOS 11, *)
+extension Date.VerbatimFormatStyle.Attributed: CalendarDependentFormatStyle {
+    func withCalendar(_ calendar: Calendar) -> Self {
+        var style = self
+        style[dynamicMember: \.calendar] = calendar
+        return style
+    }
+}
+
+@available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *)
+extension Date.AnchoredRelativeFormatStyle: CalendarDependentFormatStyle {
+    func withCalendar(_ calendar: Calendar) -> Self {
+        var style = self
+        style.calendar = calendar
+        return style
+    }
+}
+
+// TODO: Add conformance when these concrete format styles land:
+// WhitespaceRemovingFormatStyle where A: CalendarDependentFormatStyle
+// SystemFormatStyle.DateReference
+#endif

Sources/OpenSwiftUICore/View/Text/Text/CapitalizationContextDependentFormatStyle.swift → Sources/OpenSwiftUICore/View/Text/FormatStyle/CapitalizationContextDependentFormatStyle.swift

@@ -6,7 +6,6 @@
 //  Status: Complete (Blocked by SystemFormatStyle)
 //  ID: B2C9C13C743DF2F6E22ED614C39E3A5D (SwiftUICore)
 
-#if canImport(Darwin)
 public import Foundation
 
 protocol CapitalizationContextDependentFormatStyle: FormatStyle {
@@ -44,4 +43,3 @@ extension EnvironmentValues {
 // Date.AnchoredRelativeFormatStyle
 // Date.FormatStyle
 // ...
-#endif

Sources/OpenSwiftUICore/View/Text/FormatStyle/ContentTransitionProvidingFormatStyle.swift

@@ -0,0 +1,14 @@
+//
+//  protocol ContentTransitionProvidingFormatStyle.swift
+//  OpenSwiftUICore
+//
+//  Audited for 6.5.4
+//  Status: WIP (Blocked by SystemFormatStyle)
+
+package import Foundation
+
+package protocol ContentTransitionProvidingFormatStyle<FormatInput>: FormatStyle {
+    func contentTransition<Source>(
+        for source: Source
+    ) -> ContentTransition where Source: TimeDataSourceStorage, Source.Value == FormatInput
+}

Sources/OpenSwiftUICore/View/Text/FormatStyle/InterfaceIdiomDependentFormatStyle.swift

@@ -0,0 +1,16 @@
+//
+//  InterfaceIdiomDependentFormatStyle.swift
+//  OpenSwiftUICore
+//
+//  Audited for 6.5.4
+//  Status: WIP (Blocked by SystemFormatStyle)
+
+import Foundation
+
+protocol InterfaceIdiomDependentFormatStyle: FormatStyle {
+    func interfaceIdiom(_ idiom: AnyInterfaceIdiom) -> Self
+}
+
+// TODO: Add conformance when these concrete format styles land:
+// SystemFormatStyle.Timer
+// SystemFormatStyle.Stopwatch

Sources/OpenSwiftUICore/View/Text/FormatStyle/SafelySerializableDiscreteFormatStyle.swift

@@ -0,0 +1,19 @@
+//
+//  SafelySerializableDiscreteFormatStyle.swift
+//  OpenSwiftUICore
+//
+//  Audited for 6.5.4
+//  Status: WIP
+//  ID: 6E7304511B702F2103288779936F04AA (SwiftUICore)
+
+import Foundation
+
+protocol SafelySerializableDiscreteFormatStyle: DiscreteFormatStyle where FormatOutput: AttributedStringConvertible {
+    static func representation<Source>(
+        of resolvable: TimeDataFormatting.Resolvable<Source, Self>,
+        for version: ArchivedViewInput.DeploymentVersion
+    ) -> any ResolvableStringAttributeRepresentation
+        where Source: TimeDataSourceStorage, Source.Value == FormatInput
+}
+
+// TODO: Conformance