Add more extensions

Sources/XUI/Binding/Binding+Change.swift

@@ -54,10 +54,11 @@ extension Binding {
         )
     }
 
-    public func map<V>(get: @escaping (Value) -> V, set: @escaping (V) -> Value) -> Binding<V> {
+    public func map<V>(get: @escaping (Value) -> V,
+                       set: @escaping (inout Value, V) -> Void) -> Binding<V> {
         .init(
             get: { get(self.wrappedValue) },
-            set: { self.wrappedValue = set($0) }
+            set: { set(&self.wrappedValue, $0) }
         )
     }
 
@@ -75,4 +76,27 @@ extension Binding {
         )
     }
 
+    public func onlySetOnChange(_ isEqual: @escaping (Value, Value) -> Bool) -> Binding {
+        .init(
+            get: { self.wrappedValue },
+            set: { newValue in
+                guard !isEqual(self.wrappedValue, newValue) else {
+                    return
+                }
+                self.wrappedValue = newValue
+            }
+        )
+    }
+
+    public func onlySetOnChange<V>(
+        of keyPath: KeyPath<Value, V>
+    ) -> Binding where V: Equatable {
+
+        onlySetOnChange { $0[keyPath: keyPath] == $1[keyPath: keyPath] }
+    }
+
+    public func onlySetOnChange() -> Binding where Value: Equatable {
+        onlySetOnChange(==)
+    }
+
 }

Sources/XUI/Binding/Binding+Force.swift

@@ -20,5 +20,12 @@ extension Binding {
         )
     }
 
+    public func `default`<Wrapped>(_ value: Wrapped) -> Binding<Wrapped> where Value == Wrapped? {
+        .init(
+            get: { self.wrappedValue ?? value },
+            set: { self.wrappedValue = $0 }
+        )
+    }
+
 }
 

Sources/XUI/Combine/AnyPublisher+Init.swift

@@ -0,0 +1,24 @@
+//
+//  AnyPublisher+Init.swift
+//  XUI
+//
+//  Created by Paul Kraft on 01.03.21.
+//  Copyright © 2021 QuickBird Studios. All rights reserved.
+//
+
+extension AnyPublisher {
+
+    // MARK: Factory Methods
+
+    public static func just(_ value: Output) -> AnyPublisher {
+        Just(value)
+            .mapError { _ -> Failure in }
+            .eraseToAnyPublisher()
+    }
+
+    public static func failure(_ error: Failure) -> AnyPublisher {
+        Fail(error: error)
+            .eraseToAnyPublisher()
+    }
+
+}

Sources/XUI/Combine/CancellableBuilder.swift

@@ -70,6 +70,10 @@ extension Cancellable {
 
 extension RangeReplaceableCollection where Element == AnyCancellable {
 
+    public init(@CancellableBuilder _ builder: () -> [AnyCancellable]) {
+        self.init(builder())
+    }
+
     /// This method can be used to store multiple `Cancellable` objects
     /// from different subscriptions in a collection of `AnyCancellable`.
     public mutating func insert(@CancellableBuilder _ builder: () -> [AnyCancellable]) {
@@ -80,6 +84,10 @@ extension RangeReplaceableCollection where Element == AnyCancellable {
 
 extension Set where Element == AnyCancellable {
 
+    public init(@CancellableBuilder _ builder: () -> [AnyCancellable]) {
+        self.init(builder())
+    }
+
     /// This method can be used to store multiple `Cancellable` objects
     /// from different subscriptions in a set of `AnyCancellable`.
     public mutating func insert(@CancellableBuilder _ builder: () -> [AnyCancellable]) {

Sources/XUI/Internal/ErasedObservableObject.swift

@@ -8,12 +8,18 @@
 
 class ErasedObservableObject: ObservableObject {
 
+    // MARK: Stored Properties
+
     let objectWillChange: AnyPublisher<Void, Never>
 
+    // MARK: Initialization
+
     init(objectWillChange: AnyPublisher<Void, Never>) {
         self.objectWillChange = objectWillChange
     }
 
+    // MARK: Factory Methods
+
     static func empty() -> ErasedObservableObject {
         .init(objectWillChange: Empty().eraseToAnyPublisher())
     }

Sources/XUI/Internal/ObjectIdentifiable.swift

@@ -8,8 +8,12 @@
 
 struct ObjectIdentifiable: Identifiable {
 
+    // MARK: Stored Properties
+
     var id: ObjectIdentifier
 
+    // MARK: Initialization
+
     init(_ object: Any) {
         self.id = ObjectIdentifier(object as AnyObject)
     }

Sources/XUI/Store/Store.swift

@@ -9,7 +9,7 @@
 @propertyWrapper
 public struct Store<Model>: DynamicProperty {
 
-    // MARK: Nested types
+    // MARK: Nested Types
 
     @dynamicMemberLookup
     public struct Wrapper {
@@ -23,7 +23,7 @@ public struct Store<Model>: DynamicProperty {
 
     }
 
-    // MARK: Stored properties
+    // MARK: Stored Properties
 
     public let wrappedValue: Model
 

Sources/XUI/ViewModifiers/CustomModifier.swift

@@ -0,0 +1,27 @@
+//
+//  NavigationModifier.swift
+//  XUI
+//
+//  Created by Paul Kraft on 01.03.21.
+//  Copyright © 2021 QuickBird Studios. All rights reserved.
+//
+
+public struct CustomModifier<Result: View>: ViewModifier {
+
+    // MARK: Stored Properties
+
+    private let _body: (Content) -> Result
+
+    // MARK: Initialization
+
+    public init(@ViewBuilder body: @escaping (Content) -> Result) {
+        self._body = body
+    }
+
+    // MARK: Methods
+
+    public func body(content: Content) -> some View {
+        _body(content)
+    }
+
+}

Sources/XUI/Views/NavigationLink.swift

@@ -8,6 +8,8 @@
 
 extension NavigationLink {
 
+    // MARK: Initialization
+
     public init<Model, _Destination: View>(
         model: Binding<Model?>,
         @ViewBuilder destination: (Model) -> _Destination,