Add ConcatenatedTextStorage

Sources/OpenSwiftUICore/View/Text/Text/Text+Text.swift

@@ -0,0 +1,67 @@
+//
+//  Text+Text.swift
+//  OpenSwiftUICore
+//
+//  Audited for 6.5.4
+//  Status: Complete
+//  ID: 3AC20F2C4A28F04412970732648A1058 (SwiftUICore?)
+
+// MARK: - Text + Text
+
+@available(OpenSwiftUI_v1_0, *)
+extension Text {
+    package init(_ lhs: Text, _ rhs: Text) {
+        self.init(anyTextStorage: ConcatenatedTextStorage(first: lhs, second: rhs))
+    }
+
+    public static func + (lhs: Text, rhs: Text) -> Text {
+        Text(lhs, rhs)
+    }
+}
+
+// MARK: - ConcatenatedTextStorage
+
+private class ConcatenatedTextStorage: AnyTextStorage, @unchecked Sendable {
+    let first: Text
+    let second: Text
+
+    init(first: Text, second: Text) {
+        self.first = first
+        self.second = second
+    }
+
+    override func resolve<T>(
+        into result: inout T,
+        in environment: EnvironmentValues,
+        with options: Text.ResolveOptions
+    ) where T : ResolvedTextContainer {
+        first.resolve(into: &result, in: environment, with: options)
+        second.resolve(into: &result, in: environment, with: options)
+    }
+
+    override func resolvesToEmpty(
+        in environment: EnvironmentValues,
+        with options: Text.ResolveOptions
+    ) -> Bool {
+        first.resolvesToEmpty(in: environment, with: options) &&
+        second.resolvesToEmpty(in: environment, with: options)
+    }
+
+    override func isEqual(to other: AnyTextStorage) -> Bool {
+        guard let other = other as? ConcatenatedTextStorage else {
+            return false
+        }
+        return first == other.first &&
+        second == other.second
+    }
+
+    override func isStyled(options: Text.ResolveOptions) -> Bool {
+        first.isStyled(options: options) ||
+        second.isStyled(options: options)
+    }
+
+    override func allowsTypesettingLanguage() -> Bool {
+        first.allowsTypesettingLanguage() &&
+        second.allowsTypesettingLanguage()
+    }
+}