Add Direction

Author: Kyle-Ye

Sources/OpenSwiftUICore/Layout/Direction/Direction.swift

@@ -0,0 +1,77 @@
+//
+//  Direction.swift
+//  OpenSwiftUICore
+//
+//  Status: Complete
+
+// MARK: - HorizontalDirection [6.4.41]
+
+/// A direction on the horizontal axis.
+@frozen
+public enum HorizontalDirection: Int8, CaseIterable, Codable {
+    /// The leading direction.
+    case leading
+
+    /// The trailing direction.
+    case trailing
+
+    /// An efficient set of horizontal directions.
+    @frozen
+    public struct Set: OptionSet, Equatable, Hashable {
+        public let rawValue: Int8
+
+        public init(rawValue: Int8) {
+            self.rawValue = rawValue
+        }
+
+        /// A set containing only the leading horizontal direction.
+        public static let leading: HorizontalDirection.Set = .init(.leading)
+
+        /// A set containing only the trailing horizontal direction.
+        public static let trailing: HorizontalDirection.Set = .init(.trailing)
+
+        /// A set containing the leading and trailing horizontal directions.
+        public static let all: HorizontalDirection.Set = [.leading, .trailing]
+
+        /// Creates a set of directions containing only the specified direction.
+        public init(_ direction: HorizontalDirection) {
+            rawValue = 1 << direction.rawValue
+        }
+    }
+}
+
+// MARK: - VerticalDirection [6.4.41]
+
+/// A direction on the vertical axis.
+@frozen
+public enum VerticalDirection: Int8, CaseIterable, Codable {
+    /// The upward direction.
+    case up
+
+    /// The downward direction.
+    case down
+
+    /// An efficient set of vertical directions.
+    @frozen
+    public struct Set: OptionSet {
+        public let rawValue: Int8
+
+        public init(rawValue: Int8) {
+            self.rawValue = rawValue
+        }
+
+        /// A set containing only the upward vertical direction.
+        public static let up: VerticalDirection.Set = .init(.up)
+
+        /// A set containing only the downward vertical direction.
+        public static let down: VerticalDirection.Set = .init(.down)
+
+        /// A set containing the upward and downward vertical directions.
+        public static let all: VerticalDirection.Set = [.up, .down]
+
+        /// Creates a set of directions containing only the specified direction.
+        public init(_ direction: VerticalDirection) {
+            rawValue = 1 << direction.rawValue
+        }
+    }
+}