StylingCache

Sources/ThemePark/Style.swift

@@ -67,7 +67,7 @@ public struct Variant: Hashable, Sendable {
 	}
 }
 
-public struct Query {
+public struct Query: Hashable, Sendable {
 	public enum Key : Hashable, Sendable {
 		case editorBackground
 

Sources/ThemePark/StylingCache.swift

@@ -0,0 +1,25 @@
+import Foundation
+
+///Very simple type that will cache the result of style queries.
+public final class StylingCache {
+	private var cache = [Query: Style]()
+	private let styler: any Styling
+
+	public init(styler: any Styling) {
+		self.styler = styler
+	}
+}
+
+extension StylingCache: Styling {
+	public func style(for query: Query) -> Style? {
+		if let style = cache[query] {
+			return style
+		}
+
+		let style = styler.style(for: query)
+
+		self.cache[query] = style
+
+		return style
+	}
+}