[Breaking] Remove Layout Mode and Size Storage

Examples/KarrotListKitSampleApp/KarrotListKitSampleApp/Samples/VerticalLayout/VerticalLayoutItemComponent.swift

@@ -23,8 +23,4 @@ struct VerticalLayoutItemComponent: Component {
   func render(in content: VerticalLayoutItemView, coordinator: ()) {
     content.viewModel = viewModel
   }
-
-  var layoutMode: ContentLayoutMode {
-    .flexibleHeight(estimatedHeight: 54.0)
-  }
 }

Examples/KarrotListKitSampleApp/KarrotListKitSampleApp/Samples/VerticalLayout/VerticalLayoutListView.swift

@@ -76,7 +76,21 @@ final class VerticalLayoutListView: UIView {
             )
           }
         }
-        .withSectionLayout(.vertical)
+        .withSectionLayout { context in
+          let size = NSCollectionLayoutSize(
+            widthDimension: .fractionalWidth(1.0),
+            heightDimension: .estimated(44.0)
+          )
+          let item = NSCollectionLayoutItem(
+            layoutSize: size
+          )
+          let group = NSCollectionLayoutGroup.vertical(
+            layoutSize: size,
+            subitems: [item]
+          )
+
+          return NSCollectionLayoutSection(group: group)
+        }
       }.onRefresh { [weak self] _ in
         self?.resetViewModels()
       }.onReachEnd(offsetFromEnd: .relativeToContainerSize(multiplier: 1.0)) { [weak self] _ in

README.md

@@ -81,10 +81,6 @@ struct ButtonComponent: Component {
   func render(in content: Button, coordinator: Coordinator) {
     content.configure(viewModel: viewModel)
   }
-
-  var layoutMode: ContentLayoutMode {
-    .flexibleHeight(estimatedHeight: 44.0)
-  }
 }
 ```
 
@@ -114,7 +110,20 @@ let list = List {
   }
   .withHeader(ButtonComponent(viewModel: .init(title: "Header")))
   .withFooter(ButtonComponent(viewModel: .init(title: "Footer")))
-  .withSectionLayout(.vertical(spacing: 12.0))
+  .withSectionLayout { context in
+    let size = NSCollectionLayoutSize(
+      widthDimension: .fractionalWidth(1.0),
+      heightDimension: .estimated(44.0)
+    )
+    let item = NSCollectionLayoutItem(
+      layoutSize: size
+    )
+    let group = NSCollectionLayoutGroup.vertical(
+      layoutSize: size,
+      subitems: [item]
+    )
+    return NSCollectionLayoutSection(group: group)
+  }
 }
 
 collectionViewAdapter.apply(
@@ -147,9 +156,6 @@ The size of a View is actually adjusted when the View is displayed on the screen
 struct ButtonComponent: Component {
   typealias Content = Button
   // ...
-  var layoutMode: ContentLayoutMode {
-    .flexibleHeight(estimatedHeight: 44.0)
-  }
 }
 
 final class Button: UIControl {

Sources/KarrotListKit/Adapter/CollectionViewAdapter.swift

@@ -41,8 +41,6 @@ final public class CollectionViewAdapter: NSObject {
     completion: (() -> Void)?
   )?
 
-  private var componentSizeStorage: ComponentSizeStorage = ComponentSizeStorageImpl()
-
   var list: List?
 
   private lazy var pullToRefreshControl: UIRefreshControl = {
@@ -351,10 +349,6 @@ extension CollectionViewAdapter: CollectionViewLayoutAdapterDataSource {
   public func sectionItem(at index: Int) -> Section? {
     list?.sections[safe: index]
   }
-
-  public func sizeStorage() -> ComponentSizeStorage {
-    componentSizeStorage
-  }
 }
 
 // MARK: - UICollectionViewDelegate
@@ -697,12 +691,6 @@ extension CollectionViewAdapter: UICollectionViewDataSource {
       return UICollectionViewCell()
     }
 
-    cell.onSizeChanged = { [weak self] size in
-      self?.componentSizeStorage.setCellSize(
-        (size, item.component.viewModel),
-        for: item.id
-      )
-    }
     cell.cancellables = prefetchingIndexPathOperations.removeValue(forKey: indexPath)
     cell.render(component: item.component)
 
@@ -731,12 +719,6 @@ extension CollectionViewAdapter: UICollectionViewDataSource {
         return UICollectionReusableView()
       }
 
-      headerView.onSizeChanged = { [weak self] size in
-        self?.componentSizeStorage.setHeaderSize(
-          (size, header.component.viewModel),
-          for: section.id
-        )
-      }
       headerView.render(component: header.component)
 
       return headerView
@@ -757,12 +739,6 @@ extension CollectionViewAdapter: UICollectionViewDataSource {
         return UICollectionReusableView()
       }
 
-      footerView.onSizeChanged = { [weak self] size in
-        self?.componentSizeStorage.setFooterSize(
-          (size, footer.component.viewModel),
-          for: section.id
-        )
-      }
       footerView.render(component: footer.component)
 
       return footerView

Sources/KarrotListKit/Adapter/CollectionViewLayoutAdaptable.swift

@@ -17,10 +17,6 @@ public protocol CollectionViewLayoutAdapterDataSource: AnyObject {
   /// - Parameter index: The index of the section to return.
   /// - Returns: The section at the index.
   func sectionItem(at index: Int) -> Section?
-
-  /// Returns the ComponentSizeStorage that managing the cached size information.
-  /// - Returns: The ComponentSizeStorage that managing the cached size information.
-  func sizeStorage() -> ComponentSizeStorage
 }
 
 /// The `CollectionViewLayoutAdaptable` interface serves as an adapter between the UICollectionViewCompositionalLayout logic and the `KarrotListKit` layout logic
@@ -83,8 +79,7 @@ public class CollectionViewLayoutAdapter: CollectionViewLayoutAdaptable {
 
     return sectionItem.layout(
       index: index,
-      environment: environment,
-      sizeStorage: dataSource.sizeStorage()
+      environment: environment
     )
   }
 }

Sources/KarrotListKit/Component/AnyComponent.swift

@@ -36,11 +36,6 @@ public struct AnyComponent: Component, Equatable {
     box.base
   }
 
-  /// The layout mode of the component's content.
-  public var layoutMode: ContentLayoutMode {
-    box.layoutMode
-  }
-
   /// A reuse identifier for the component.
   public var reuseIdentifier: String {
     box.reuseIdentifier
@@ -116,7 +111,6 @@ private protocol ComponentBox {
 
   var base: Base { get }
   var reuseIdentifier: String { get }
-  var layoutMode: ContentLayoutMode { get }
   var viewModel: Base.ViewModel { get }
 
   func renderContent(coordinator: Any) -> UIView
@@ -135,10 +129,6 @@ private struct AnyComponentBox<Base: Component>: ComponentBox {
     baseComponent.viewModel
   }
 
-  var layoutMode: ContentLayoutMode {
-    baseComponent.layoutMode
-  }
-
   var baseComponent: Base
 
   var base: Base {

Sources/KarrotListKit/Component/Component.swift

@@ -26,9 +26,6 @@ public protocol Component {
   /// A reuse identifier for the component.
   var reuseIdentifier: String { get }
 
-  /// The layout mode of the component's content.
-  var layoutMode: ContentLayoutMode { get }
-
   /// Creates the content object and configures its initial state.
   ///
   /// - Parameter coordinator: The coordinator to use for rendering the content.