Feat/recursive group

Sources/GameWidget/Display.swift

@@ -0,0 +1,75 @@
+//
+//  File.swift
+//  
+//
+//  Created by rrbox on 2022/07/24.
+//
+
+import SpriteKit
+
+/// SingleWidgetDisplay の place により生成され, 二つの WidgetList(一方は Display)を保持します.
+public struct RecursiveDisplay<T: WidgetList, U: WidgetList>: Widget, WidgetList {
+
+    var first: T
+    var second: U
+
+    public func place<V: WidgetList>(@GroupBuilder block: () -> V) -> RecursiveDisplay<Self, V> {
+        .init(first: self, second: block())
+    }
+
+    public func widgetNodes() -> [SKNode] {
+        self.first.widgetNodes() + self.second.widgetNodes()
+    }
+
+    public func node() -> SKNode {
+        let result = SKNode()
+
+        for node in self.first.widgetNodes() + self.second.widgetNodes() {
+            result.addChild(node)
+        }
+
+        return result
+    }
+
+}
+
+/// 一つの widget から RecursiveDisplay を生成するためのラッパー.
+/// Display の place により生成され, 一つの WidgetList を保持します.
+public struct SingleWidgetDisplay<T: WidgetList>: Widget, WidgetList {
+
+    var widgetList: T
+
+    public func place<U: WidgetList>(@GroupBuilder block: () -> U) -> RecursiveDisplay<Self, U> {
+        RecursiveDisplay(first: self, second: block())
+    }
+
+    public func widgetNodes() -> [SKNode] {
+        self.widgetList.widgetNodes()
+    }
+
+    public func node() -> SKNode {
+        let result = SKNode()
+        for node in self.widgetList.widgetNodes() {
+            result.addChild(node)
+        }
+        return result
+    }
+
+}
+
+/// Widget のレイアウトの起点. place メソッドチェーンで無制限に Widget を配置できます.
+/// - note: 一回の place メソッドで配置可能な widget の数は 10 個までです.
+public struct Display: Widget {
+
+    public init() {}
+
+    public func place<T: WidgetList>(@GroupBuilder block: () -> T) -> SingleWidgetDisplay<T> {
+        SingleWidgetDisplay(widgetList: block())
+    }
+
+    public func node() -> SKNode {
+        fatalError("display has no widget")
+    }
+
+}
+

Sources/GameWidget/Entity.swift

@@ -9,9 +9,9 @@ import GameplayKit
 
 final private class UserInterfaceBaseNode: GKSKNodeComponent {}
 
-final public class UserInterfaceDisplay: GKSKNodeComponent {
+final public class UserInterfaceDisplay<T: Widget>: GKSKNodeComponent {
 
-    init(_ display: Display) {
+    init(_ display: T) {
         super.init(node: display.node())
     }
 
@@ -29,7 +29,7 @@ final public class UserInterfaceDisplay: GKSKNodeComponent {
 
 }
 
-public func makeUserInterfaceEntity(camera: SKNode, display: Display) -> GKEntity {
+public func makeUserInterfaceEntity<T: Widget>(camera: SKNode, display: T) -> GKEntity {
     let result = GKEntity()
     result.addComponent(UserInterfaceBaseNode(node: camera))
     result.addComponent(UserInterfaceDisplay(display))

Sources/GameWidget/Group.swift

@@ -0,0 +1,196 @@
+//
+//  File.swift
+//  
+//
+//  Created by rrbox on 2022/07/24.
+//
+
+import CoreGraphics
+import SpriteKit
+
+@resultBuilder public struct GroupBuilder {
+
+    public static func buildBlock<C0: Widget>(_ c0: C0) -> some WidgetList {
+        Single(widget: c0)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget>(_ c0: C0, _ c1: C1) -> some WidgetList{
+        Single(widget: c0)
+            .append(c1)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget, C2: Widget>(_ c0: C0, _ c1: C1, _ c2: C2) -> some WidgetList {
+        Single(widget: c0)
+            .append(c1)
+            .append(c2)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget, C2: Widget, C3: Widget>(_ c0: C0, _ c1: C1, _ c2: C2, _ c3: C3) -> some WidgetList {
+        Single(widget: c0)
+            .append(c1)
+            .append(c2)
+            .append(c3)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget, C2: Widget, C3: Widget, C4: Widget>(_ c0: C0, _ c1: C1, _ c2: C2, _ c3: C3, _ c4: C4) -> some WidgetList {
+        Single(widget: c0)
+            .append(c1)
+            .append(c2)
+            .append(c3)
+            .append(c4)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget, C2: Widget, C3: Widget, C4: Widget, C5: Widget>(_ c0: C0, _ c1: C1, _ c2: C2, _ c3: C3, _ c4: C4, _ c5: C5) -> some WidgetList {
+        Single(widget: c0)
+            .append(c1)
+            .append(c2)
+            .append(c3)
+            .append(c4)
+            .append(c5)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget, C2: Widget, C3: Widget, C4: Widget, C5: Widget, C6: Widget>(_ c0: C0, _ c1: C1, _ c2: C2, _ c3: C3, _ c4: C4, _ c5: C5, _ c6: C6) -> some WidgetList {
+        Single(widget: c0)
+            .append(c1)
+            .append(c2)
+            .append(c3)
+            .append(c4)
+            .append(c5)
+            .append(c6)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget, C2: Widget, C3: Widget, C4: Widget, C5: Widget, C6: Widget, C7: Widget>(_ c0: C0, _ c1: C1, _ c2: C2, _ c3: C3, _ c4: C4, _ c5: C5, _ c6: C6, _ c7: C7) -> some WidgetList {
+        Single(widget: c0)
+            .append(c1)
+            .append(c2)
+            .append(c3)
+            .append(c4)
+            .append(c5)
+            .append(c6)
+            .append(c7)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget, C2: Widget, C3: Widget, C4: Widget, C5: Widget, C6: Widget, C7: Widget, C8: Widget>(_ c0: C0, _ c1: C1, _ c2: C2, _ c3: C3, _ c4: C4, _ c5: C5, _ c6: C6, _ c7: C7, _ c8: C8) -> some WidgetList {
+        Single(widget: c0)
+            .append(c1)
+            .append(c2)
+            .append(c3)
+            .append(c4)
+            .append(c5)
+            .append(c6)
+            .append(c7)
+            .append(c8)
+    }
+
+    public static func buildBlock<C0: Widget, C1: Widget, C2: Widget, C3: Widget, C4: Widget, C5: Widget, C6: Widget, C7: Widget, C8: Widget, C9: Widget>(_ c0: C0, _ c1: C1, _ c2: C2, _ c3: C3, _ c4: C4, _ c5: C5, _ c6: C6, _ c7: C7, _ c8: C8, _ c9: C9) -> some WidgetList {
+        Single(widget: c0)
+            .append(c1)
+            .append(c2)
+            .append(c3)
+            .append(c4)
+            .append(c5)
+            .append(c6)
+            .append(c7)
+            .append(c8)
+            .append(c9)
+    }
+
+}
+
+public protocol WidgetList {
+    func widgetNodes() -> [SKNode]
+}
+
+/// 再帰可能. widget のペアです. オーバーヘッドはありません.
+public struct RecursiveGroup<T: WidgetList, U: Widget>: WidgetList {
+
+    var first: T
+    var second: U
+
+    func append<V: Widget>(_ newWidget: V) -> RecursiveGroup<Self, V> {
+        .init(first: self, second: newWidget)
+    }
+
+    public func widgetNodes() -> [SKNode] {
+        var result = self.first.widgetNodes()
+        self.second.addTo(parent: &result)
+        return result
+    }
+
+}
+
+// 一つの widget から RecursiveGroup を生成するためのラッパー.
+struct Single<T: Widget>: WidgetList {
+
+    var widget: T
+
+    func append<U: Widget>(_ newWidget: U) -> RecursiveGroup<Self, U> {
+        .init(first: self, second: newWidget)
+    }
+
+    func widgetNodes() -> [SKNode] {
+        var result = [SKNode]()
+        self.widget.addTo(parent: &result)
+        return result
+    }
+
+}
+
+/// 10 個以下の widget を一つの widget としてまとめます. 座標, スケール, 回転を内包するコンテンツと共に調整することができます.
+/// - note: 数値をもつため, 40バイトのメモリを必要とします.
+public struct Node<Content: WidgetList>: NodeWidget, WidgetList {
+
+    public var position: CGPoint = .zero
+    public var zRotation: CGFloat = .zero
+    public var xScale: CGFloat = 1
+    public var yScale: CGFloat = 1
+
+    var content: Content
+
+    public init(@GroupBuilder _ content: () -> Content) {
+        self.content = content()
+    }
+
+    public func widgetNodes() -> [SKNode] {
+        var result = [SKNode]()
+        self.addTo(parent: &result)
+        return result
+    }
+
+    public func node() -> SKNode {
+        let result = SKNode()
+        for i in self.content.widgetNodes() {
+            result.addChild(i)
+        }
+        return result
+    }
+
+}
+
+/// widget 数を増やす際に使用します. 10 個以下の widget を内包することができます.
+/// - note: モディファイアはありませんが, メモリのオーバーヘッドがありません.
+public struct Extension<Content: WidgetList>: Widget, WidgetList {
+
+    var content: Content
+
+    public init(@GroupBuilder _ content: () -> Content) {
+        self.content = content()
+    }
+
+    public func widgetNodes() -> [SKNode] {
+        self.content.widgetNodes()
+    }
+
+    public func node() -> SKNode {
+        fatalError("Extension は node を生成しません.")
+    }
+
+    public func addTo(parent list: inout [SKNode]) {
+        for node in self.content.widgetNodes() {
+            list.append(node)
+        }
+    }
+
+}
+
+