Initial commit

.gitattributes

@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto

.gitignore

@@ -0,0 +1,9 @@
+.DS_Store
+/.build
+/Packages
+/*.xcodeproj
+xcuserdata/
+DerivedData/
+.swiftpm/config/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc

.swiftpm/xcode/package.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

.swiftpm/xcode/xcshareddata/xcschemes/StyleInjection.xcscheme

@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1330"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "StyleInjection"
+               BuildableName = "StyleInjection"
+               BlueprintName = "StyleInjection"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "NO"
+            buildForArchiving = "NO"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "StyleInjectionTests"
+               BuildableName = "StyleInjectionTests"
+               BlueprintName = "StyleInjectionTests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      codeCoverageEnabled = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "StyleInjectionTests"
+               BuildableName = "StyleInjectionTests"
+               BlueprintName = "StyleInjectionTests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "StyleInjection"
+            BuildableName = "StyleInjection"
+            BlueprintName = "StyleInjection"
+            ReferencedContainer = "container:">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Package.swift

@@ -0,0 +1,28 @@
+// swift-tools-version: 5.6
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "StyleInjection",
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "StyleInjection",
+            targets: ["StyleInjection"]),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages this package depends on.
+        .target(
+            name: "StyleInjection",
+            dependencies: []),
+        .testTarget(
+            name: "StyleInjectionTests",
+            dependencies: ["StyleInjection"]),
+    ]
+)

README.md

@@ -0,0 +1,3 @@
+# StyleInjection
+
+A description of this package.

Sources/StyleInjection/StyleInjection.swift

@@ -0,0 +1,56 @@
+import Foundation
+import UIKit
+
+// MARK: - StyleInjection.
+public protocol StyleInjection {
+    /// Apply this style to a UIView.
+    ///
+    /// - Parameter style: the function to style
+    func applyStyle<View: UIView>(to view: View)
+
+    /// Apply this style to multiple views.
+    ///
+    /// - Parameter views: the views to style
+    func applyStyle<View: UIView>(to view: View...)
+}
+
+public extension StyleInjection {
+    /// Static instance of UIViewStyle.
+    static var stylizable: Stylizable<Self> { Stylizable() }
+}
+
+// MARK: - StyleInjection.
+public extension StyleInjection {
+    /// Apply value from keypath.
+    ///
+    /// - Parameter keyPath: the views keypath
+    /// - Parameter newValue: the value of keypath
+    @discardableResult
+    func set<Value>(_ keyPath:ReferenceWritableKeyPath<Self, Value>,to newValue: Value) -> Self {
+        self[keyPath: keyPath] = newValue
+        return self
+    }
+
+    /// Apply value from keypath.
+    ///
+    /// - Parameter keyPath: the views keypath
+    /// - Parameter newValue: the value of keypath
+    @discardableResult
+    mutating func set<Value>(_ keyPath:WritableKeyPath<Self, Value>,to newValue: Value) -> Self {
+        self[keyPath: keyPath] = newValue
+        return self
+    }
+}
+
+// MARK: - UIView.
+extension UIView: StyleInjection {
+    /// Apply this style to a UIView.
+    ///
+    /// - Parameter style: the function to style
+    public func applyStyle<View>(to view: View) { }
+
+    /// Apply this style to multiple views.
+    ///
+    /// - Parameter views: the views to style
+    public func applyStyle<View>(to view: View...) { }
+}

Sources/StyleInjection/StyleInjectionGroup.swift

@@ -0,0 +1,15 @@
+//
+//  File.swift
+//  
+//
+//  Created by Claudio Cavalli on 29/05/22.
+//
+
+import Foundation
+import UIKit
+
+// MARK: - StyleInjectionGroup.
+public protocol StyleInjectionGroup {
+    func getStylizable(key: StyleInjectionKey) -> StyleInjection?
+    func applyStyle<View: UIView>(key: StyleInjectionKey, view: View)
+}

Sources/StyleInjection/StyleInjectionGroupBuilder.swift

@@ -0,0 +1,60 @@
+//
+//  File.swift
+//  
+//
+//  Created by Claudio Cavalli on 29/05/22.
+//
+
+import Foundation
+import UIKit
+
+// MARK: - Array StyleInjectionGroup.
+extension Array: StyleInjectionGroup where Element == StylizableGroup {
+    public func getStylizable(key: StyleInjectionKey) -> StyleInjection? {
+        self.first {
+            $0.getStylizable(key: key) != nil
+        }?.stylizable?.1
+    }
+
+    public func applyStyle<View: UIView>(key: StyleInjectionKey, view: View) {
+        guard let stylizable = getStylizable(key: key) else { return }
+
+        stylizable.applyStyle(to: view)
+    }
+
+    public var stylizable: [StylizableGroup] { self }
+}
+
+extension Array where Element == StyleInjectionGroup {
+    public func getStylizable(key: StyleInjectionKey) -> StyleInjection? {
+        (self.first {
+            $0.getStylizable(key: key) != nil
+        } as? StylizableGroup)?.stylizable?.1
+    }
+
+    public func applyStyle<View: UIView>(key: StyleInjectionKey, view: View) {
+        guard let stylizable = getStylizable(key: key) else { return }
+
+        stylizable.applyStyle(to: view)
+    }
+}
+
+// MARK: - StyleInjectionGroupBuilder.
+@resultBuilder
+public struct StyleInjectionGroupBuilder {
+    public static func buildBlock(_ group: StylizableGroup...) -> [StyleInjectionGroup] {
+        group.compactMap { $0 }
+    }
+
+    public static func buildOptional(_ group: [StylizableGroup]?) -> [StyleInjectionGroup] {
+        group?.compactMap { $0 } ?? []
+    }
+
+    public static func buildEither(first group: [StylizableGroup]) -> [StyleInjectionGroup] {
+        group.compactMap { $0 }
+    }
+
+    public static func buildEither(second group: [StylizableGroup]) -> [StyleInjectionGroup] {
+        group.compactMap { $0 }
+    }
+}

Sources/StyleInjection/StyleInjectionGroupFactory.swift

@@ -0,0 +1,13 @@
+//
+//  File.swift
+//  
+//
+//  Created by Claudio Cavalli on 29/05/22.
+//
+
+import Foundation
+
+// MARK: - StyleInjectionGroupFactory.
+public protocol StyleInjectionGroupFactory {
+    associatedtype StyleKey: RawRepresentable where StyleKey.RawValue: StringProtocol
+}

Sources/StyleInjection/StyleInjectionKey.swift

@@ -0,0 +1,13 @@
+//
+//  File.swift
+//  
+//
+//  Created by Claudio Cavalli on 29/05/22.
+//
+
+import Foundation
+
+// MARK: - StyleInjectionKey.
+public protocol StyleInjectionKey {
+    var keyValue: String { get }
+}

Sources/StyleInjection/Stylizable.swift

@@ -0,0 +1,40 @@
+//
+//  File.swift
+//  
+//
+//  Created by Claudio Cavalli on 29/05/22.
+//
+
+import Foundation
+
+// MARK: - Stylizable.
+public struct Stylizable<ViewStyle>: StyleInjection {
+    /// The styling function that takes a `UIView` instance
+    /// and performs side-effects on it.
+    public var style: ((ViewStyle)-> Void)?
+
+    /// Build a UIViewStyle with style.
+    ///
+    /// - Parameter style: the function to style
+    public func buildStyle(style: ((ViewStyle)-> Void)?) -> StyleInjection {
+        Stylizable(style: style)
+    }
+
+    /// Apply this style to a UIView.
+    ///
+    /// - Parameter view: the view to style
+    public func applyStyle<View>(to view: View) {
+        guard let view = view as? ViewStyle else { return }
+        style?(view)
+    }
+
+    /// Apply this style to multiple views.
+    ///
+    /// - Parameter views: the views to style
+    public func applyStyle<View>(to views: View...) {
+        views.forEach { view in
+            applyStyle(to: view)
+        }
+    }
+}
+