Add Animations and List showcase (#13)

Summary: Pull Request resolved: https://github.com/facebookincubator/QuickLayout/pull/13

Reviewed By: saadhzahid

Differential Revision: D90382201

Pulled By: constantine-fry

fbshipit-source-id: 6726c6b6ee9c473b3a2a43880c9acf65e4f40ae9

Sources/QuickLayout/QuickLayout/__showcase__/4-ListExample/BarsListViewController.swift

@@ -10,13 +10,15 @@ import UIKit
 final class BarsListViewController: UIViewController {
   private var dataSource: UICollectionViewDiffableDataSource<Int, BarModel>?
 
-  private lazy var collectionView = {
+  private lazy var layout = {
     let layout = UICollectionViewFlowLayout()
     layout.scrollDirection = .vertical
     layout.minimumLineSpacing = 0
     layout.minimumLineSpacing = 0
-    // patternlint-disable-next-line ig-avoid-uiscreen-bounds-swift
-    layout.itemSize = UIScreen.main.bounds.size
+    return layout
+  }()
+
+  private lazy var collectionView = {
     let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
     collectionView.register(BarCardViewCell.self, forCellWithReuseIdentifier: BarCardViewCell.reuseIdentifier)
 
@@ -37,6 +39,13 @@ final class BarsListViewController: UIViewController {
     self.view = collectionView
   }
 
+  override func viewDidLayoutSubviews() {
+    super.viewDidLayoutSubviews()
+    if layout.itemSize != view.bounds.size {
+      layout.itemSize = view.bounds.size
+    }
+  }
+
   func configureDataSource() {
     dataSource = UICollectionViewDiffableDataSource<Int, BarModel>(collectionView: collectionView) { (collectionView: UICollectionView, indexPath: IndexPath, item: BarModel) -> UICollectionViewCell? in
       guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: BarCardViewCell.reuseIdentifier, for: indexPath) as? BarCardViewCell else {

Sources/QuickLayout/QuickLayout/__showcase__/QuickLayoutShowcaseApp.swift

@@ -37,7 +37,16 @@ struct ShowcaseApp: View {
       [
         StateManagementView.self
       ]),
-
+    SCSection(
+      "Animations",
+      [
+        UpdatingWithAnimationView.self
+      ]),
+    SCSection(
+      "List",
+      [
+        BarsListViewController.self
+      ]),
     SCSection(
       "Alignment",
       [
@@ -101,34 +110,83 @@ struct ShowcaseApp: View {
 
 private struct ShowcaseViewRepresentable: UIViewRepresentable {
 
-  let view: UIView.Type
+  let viewType: UIView.Type
 
   init(_ viewType: UIView.Type) {
-    self.view = viewType
+    self.viewType = viewType
   }
 
   func makeUIView(context: Context) -> some UIView {
-    view.init() as UIView
+    viewType.init() as UIView
   }
 
   func updateUIView(_ uiView: UIViewType, context: Context) {
   }
 }
 
+private struct ShowcaseViewControllerRepresentable: UIViewControllerRepresentable {
+
+  let viewControllerType: UIViewController.Type
+
+  init(_ viewControllerType: UIViewController.Type) {
+    self.viewControllerType = viewControllerType
+  }
+
+  func makeUIViewController(context: Context) -> some UIViewController {
+    viewControllerType.init() as UIViewController
+  }
+
+  func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {
+  }
+}
+
+private enum ShowcaseType {
+  case view(UIView.Type)
+  case viewController(UIViewController.Type)
+
+  var underlyingType: Any.Type {
+    switch self {
+    case let .view(viewType):
+      return viewType
+    case let .viewController(viewControllerType):
+      return viewControllerType
+    }
+  }
+}
+
+@MainActor
+private protocol ShowcaseTypeConvertable {
+  static var showcaseType: ShowcaseType { get }
+}
+
+extension UIView: ShowcaseTypeConvertable {
+  fileprivate static var showcaseType: ShowcaseType { .view(Self.self) }
+}
+
+extension UIViewController: ShowcaseTypeConvertable {
+  fileprivate static var showcaseType: ShowcaseType { .viewController(Self.self) }
+}
+
 private struct SCShowcase: Identifiable, Hashable {
   let id = UUID()
 
-  let viewType: UIView.Type
+  let showcaseType: ShowcaseType
   let label: String
 
-  init(viewType: UIView.Type) {
-    self.viewType = viewType
-    self.label = String(describing: viewType).splittingCamelCase()
+  init(showcaseType: ShowcaseType) {
+    self.showcaseType = showcaseType
+    self.label = String(describing: showcaseType.underlyingType).splittingCamelCase()
   }
 
   @MainActor
+  @ViewBuilder
   func view() -> some View {
-    ShowcaseViewRepresentable(viewType)
+    switch showcaseType {
+    case let .view(viewType):
+      ShowcaseViewRepresentable(viewType)
+    case let .viewController(viewControllerType):
+      ShowcaseViewControllerRepresentable(viewControllerType)
+    }
   }
 
   static func == (lhs: SCShowcase, rhs: SCShowcase) -> Bool {
@@ -142,7 +200,12 @@ private struct SCShowcase: Identifiable, Hashable {
 
 private extension String {
   func splittingCamelCase() -> String {
-    let stripped = self.hasSuffix("View") ? String(self.dropLast(4)) : self
+    let stripped =
+      self.hasSuffix("View")
+      ? String(self.dropLast(4))
+      : (self.hasSuffix("ViewController")
+        ? String(self.dropLast(14))
+        : self)
 
     // Split by uppercase letters
     let words = stripped.reduce("") { result, char in
@@ -159,14 +222,15 @@ private extension String {
   }
 }
 
+@MainActor
 private struct SCSection: Identifiable, Hashable {
   let id = UUID()
   let showscases: [SCShowcase]
   let title: String
 
-  init(_ title: String, _ showcases: [UIView.Type]) {
+  init(_ title: String, _ showcases: [ShowcaseTypeConvertable.Type]) {
     self.title = title
-    self.showscases = showcases.map { SCShowcase(viewType: $0) }
+    self.showscases = showcases.map { SCShowcase(showcaseType: $0.showcaseType) }
   }
 }