Reformatted code to swift 5.10

.swiftformat

@@ -24,17 +24,18 @@
 --octalgrouping none
 --operatorfunc spaced
 --patternlet hoist
---self remove
---selfrequired 
+--selfrequired
 --semicolons inline
 --stripunusedargs closure-only
 --tabwidth unspecified
---trailingclosures 
 --trimwhitespace always
 --wraparguments preserve
 --wrapcollections preserve
 --xcodeindentation disabled
 --modifierorder public,override
---disable blankLinesAtEndOfScope,blankLinesAtStartOfScope,wrapMultilineStatementBraces,preferKeyPath,preferForLoop
---enable isEmpty
---exclude Pods,docs,Example/Pods
+--nevertrailing map, flatMap, compactMap
+--funcattributes prev-line
+--typeattributes prev-line
+--disable wrapMultilineStatementBraces, preferKeyPath, trailingclosures, preferForLoop,conditionalAssignment
+--enable isEmpty,wrapConditionalBodies,noExplicitOwnership,wrapEnumCases,wrapSwitchCases,sortSwitchCases,wrapAttributes
+--exclude Pods,docs,Example/Pods,RecyclerView/Classes/Utils/Stolen

ChatLayout/Classes/Core/ChatItemAlignment.swift

@@ -15,7 +15,6 @@ import UIKit
 
 /// Represent item alignment in collection view layout
 public enum ChatItemAlignment: Hashable {
-
     /// Should be aligned at the leading edge of the layout. That includes all the additional content offsets.
     case leading
 
@@ -27,5 +26,4 @@ public enum ChatItemAlignment: Hashable {
 
     /// Should be aligned using the full width of the available content width.
     case fullWidth
-
 }

ChatLayout/Classes/Core/ChatLayoutAttributes.swift

@@ -15,7 +15,6 @@ import UIKit
 
 /// Custom implementation of `UICollectionViewLayoutAttributes`
 public final class ChatLayoutAttributes: UICollectionViewLayoutAttributes {
-
     /// Alignment of the current item. Can be changed within `UICollectionViewCell.preferredLayoutAttributesFitting(...)`
     public var alignment: ChatItemAlignment = .fullWidth
 
@@ -79,11 +78,11 @@ public final class ChatLayoutAttributes: UICollectionViewLayoutAttributes {
     public var kind: ItemKind {
         switch (representedElementCategory, representedElementKind) {
         case (.cell, nil):
-            return .cell
+            .cell
         case (.supplementaryView, .some(UICollectionView.elementKindSectionHeader)):
-            return .header
+            .header
         case (.supplementaryView, .some(UICollectionView.elementKindSectionFooter)):
-            return .footer
+            .footer
         default:
             preconditionFailure("Unsupported element kind.")
         }
@@ -95,5 +94,4 @@ public final class ChatLayoutAttributes: UICollectionViewLayoutAttributes {
         }
         return typedCopy
     }
-
 }

ChatLayout/Classes/Core/ChatLayoutDelegate.swift

@@ -15,18 +15,15 @@ import UIKit
 
 /// Represents the point in time when `CollectionViewChatLayout` asks about layout attributes modification.
 public enum InitialAttributesRequestType: Hashable {
-
     /// `UICollectionView` initially asks about the layout of an item.
     case initial
 
     /// An item is being invalidated.
     case invalidation
-
 }
 
 /// `CollectionViewChatLayout` delegate
 public protocol ChatLayoutDelegate: AnyObject {
-
     /// `CollectionViewChatLayout` will call this method to ask if it should present the header in the current layout.
     /// - Parameters:
     ///   - chatLayout: `CollectionViewChatLayout` reference.
@@ -121,12 +118,10 @@ public protocol ChatLayoutDelegate: AnyObject {
     ///   - sectionIndex: Index of the section.
     func interSectionSpacing(_ chatLayout: CollectionViewChatLayout,
                              after sectionIndex: Int) -> CGFloat?
-
 }
 
 /// Default extension.
 public extension ChatLayoutDelegate {
-
     /// Default implementation returns: `false`.
     func shouldPresentHeader(_ chatLayout: CollectionViewChatLayout,
                              at sectionIndex: Int) -> Bool {
@@ -182,5 +177,4 @@ public extension ChatLayoutDelegate {
                              after sectionIndex: Int) -> CGFloat? {
         nil
     }
-
 }

ChatLayout/Classes/Core/ChatLayoutInvalidationContext.swift

@@ -15,9 +15,7 @@ import UIKit
 
 /// Custom implementation of `UICollectionViewLayoutInvalidationContext`
 public final class ChatLayoutInvalidationContext: UICollectionViewLayoutInvalidationContext {
-
     /// Indicates whether to recompute the positions and sizes of the items based on the current
     /// collection view and delegate layout metrics.
     public var invalidateLayoutMetrics = true
-
 }

ChatLayout/Classes/Core/ChatLayoutPositionSnapshot.swift

@@ -15,16 +15,13 @@ import UIKit
 
 /// Represents content offset position expressed by the specific item and it offset from the top or bottom edge.
 public struct ChatLayoutPositionSnapshot: Hashable {
-
     /// Represents the edge.
     public enum Edge: Hashable {
-
         /// Top edge of the `UICollectionView`
         case top
 
         /// Bottom edge of the `UICollectionView`
         case bottom
-
     }
 
     /// Item's `IndexPath`
@@ -54,5 +51,4 @@ public struct ChatLayoutPositionSnapshot: Hashable {
         self.offset = offset
         self.kind = kind
     }
-
 }

ChatLayout/Classes/Core/ChatLayoutSettings.swift

@@ -15,7 +15,6 @@ import UIKit
 
 /// `CollectionViewChatLayout` settings.
 public struct ChatLayoutSettings: Equatable {
-
     /// Estimated item size for `CollectionViewChatLayout`. This value will be used as the initial size of the item and the final size
     /// will be calculated using `UICollectionViewCell.preferredLayoutAttributesFitting(...)`.
     public var estimatedItemSize: CGSize?
@@ -28,5 +27,4 @@ public struct ChatLayoutSettings: Equatable {
 
     /// Additional insets for the `CollectionViewChatLayout` content.
     public var additionalInsets: UIEdgeInsets = .zero
-
 }

ChatLayout/Classes/Core/CollectionViewChatLayout.swift

@@ -36,7 +36,6 @@ import UIKit
 ///
 /// `CollectionViewChatLayout.restoreContentOffset(...)`
 open class CollectionViewChatLayout: UICollectionViewLayout {
-
     // MARK: Custom Properties
 
     /// `CollectionViewChatLayout` delegate.
@@ -169,23 +168,19 @@ open class CollectionViewChatLayout: UICollectionViewLayout {
     // MARK: Private Properties
 
     private struct PrepareActions: OptionSet {
-
         let rawValue: UInt
 
         static let recreateSectionModels = PrepareActions(rawValue: 1 << 0)
         static let updateLayoutMetrics = PrepareActions(rawValue: 1 << 1)
         static let cachePreviousWidth = PrepareActions(rawValue: 1 << 2)
         static let cachePreviousContentInsets = PrepareActions(rawValue: 1 << 3)
         static let switchStates = PrepareActions(rawValue: 1 << 4)
-
     }
 
     private struct InvalidationActions: OptionSet {
-
         let rawValue: UInt
 
         static let shouldInvalidateOnBoundsChange = InvalidationActions(rawValue: 1 << 0)
-
     }
 
     private lazy var controller = StateController(layoutRepresentation: self)
@@ -220,9 +215,15 @@ open class CollectionViewChatLayout: UICollectionViewLayout {
     // MARK: IOS 15.1 fix flags
 
     private var needsIOS15_1IssueFix: Bool {
-        guard enableIOS15_1Fix else { return false }
-        guard #unavailable(iOS 15.2) else { return false }
-        guard #available(iOS 15.1, *) else { return false }
+        guard enableIOS15_1Fix else {
+            return false
+        }
+        guard #unavailable(iOS 15.2) else {
+            return false
+        }
+        guard #available(iOS 15.1, *) else {
+            return false
+        }
         return isUserInitiatedScrolling && !controller.isAnimatedBoundsChange
     }
 
@@ -599,7 +600,8 @@ open class CollectionViewChatLayout: UICollectionViewLayout {
             switch preferredMessageAttributes.kind {
             case .cell:
                 context.invalidateItems(at: [preferredMessageAttributes.indexPath])
-            case .header, .footer:
+            case .footer,
+                 .header:
                 context.invalidateSupplementaryElements(ofKind: preferredMessageAttributes.kind.supplementaryElementStringType, at: [preferredMessageAttributes.indexPath])
             }
         }
@@ -939,11 +941,9 @@ open class CollectionViewChatLayout: UICollectionViewLayout {
         }
         return attributes
     }
-
 }
 
 extension CollectionViewChatLayout {
-
     func configuration(for element: ItemKind, at indexPath: IndexPath) -> ItemModel.Configuration {
         let itemSize = estimatedSize(for: element, at: indexPath)
         let interItemSpacing: CGFloat
@@ -1023,11 +1023,9 @@ extension CollectionViewChatLayout {
             invalidatedAttributes[kind] = []
         }
     }
-
 }
 
 extension CollectionViewChatLayout: ChatLayoutRepresentation {
-
     func numberOfItems(in section: Int) -> Int {
         guard let collectionView else {
             return .zero
@@ -1056,7 +1054,6 @@ extension CollectionViewChatLayout: ChatLayoutRepresentation {
 }
 
 extension CollectionViewChatLayout {
-
     private var maxPossibleContentOffset: CGPoint {
         guard let collectionView else {
             return .zero
@@ -1071,5 +1068,4 @@ extension CollectionViewChatLayout {
         }
         return collectionView.isDragging || collectionView.isDecelerating
     }
-
 }

ChatLayout/Classes/Core/Extensions/CGRect+Extension.swift

@@ -14,7 +14,6 @@ import Foundation
 import UIKit
 
 extension CGRect {
-
     var higherPoint: CGPoint {
         origin
     }
@@ -27,9 +26,9 @@ extension CGRect {
         CGPoint(x: origin.x + size.width / 2, y: origin.y + size.height / 2)
     }
 
-    @inline(__always) mutating func offsettingBy(dx: CGFloat, dy: CGFloat) {
+    @inline(__always)
+    mutating func offsettingBy(dx: CGFloat, dy: CGFloat) {
         origin.x += dx
         origin.y += dy
     }
-
 }

ChatLayout/Classes/Core/Extensions/IndexPath+Extension.swift

@@ -13,9 +13,7 @@
 import Foundation
 
 extension IndexPath {
-
     var itemPath: ItemPath {
         ItemPath(for: self)
     }
-
 }

ChatLayout/Classes/Core/Extensions/RandomAccessCollection+Extension.swift

@@ -13,7 +13,6 @@
 import Foundation
 
 extension RandomAccessCollection where Index == Int {
-
     func binarySearch(predicate: (Element) -> ComparisonResult) -> Index? {
         var lowerBound = startIndex
         var upperBound = endIndex
@@ -79,5 +78,4 @@ extension RandomAccessCollection where Index == Int {
 
         return Array(self[lowerBound...upperBound])
     }
-
 }

ChatLayout/Classes/Core/Model/ChangeItem.swift

@@ -15,7 +15,6 @@ import UIKit
 
 /// Internal replacement for `UICollectionViewUpdateItem`.
 enum ChangeItem: Equatable {
-
     /// Delete section at `sectionIndex`
     case sectionDelete(sectionIndex: Int)
 
@@ -98,5 +97,4 @@ enum ChangeItem: Equatable {
             return nil
         }
     }
-
 }

ChatLayout/Classes/Core/Model/ItemKind.swift

@@ -15,7 +15,6 @@ import UIKit
 
 /// Type of the item supported by `CollectionViewChatLayout`
 public enum ItemKind: CaseIterable, Hashable {
-
     /// Header item
     case header
 
@@ -40,9 +39,10 @@ public enum ItemKind: CaseIterable, Hashable {
     public var isSupplementaryItem: Bool {
         switch self {
         case .cell:
-            return false
-        case .header, .footer:
-            return true
+            false
+        case .footer,
+             .header:
+            true
         }
     }
 
@@ -51,10 +51,9 @@ public enum ItemKind: CaseIterable, Hashable {
         case .cell:
             preconditionFailure("Cell type is not a supplementary view.")
         case .header:
-            return UICollectionView.elementKindSectionHeader
+            UICollectionView.elementKindSectionHeader
         case .footer:
-            return UICollectionView.elementKindSectionFooter
+            UICollectionView.elementKindSectionFooter
         }
     }
-
 }

ChatLayout/Classes/Core/Model/ItemModel.swift

@@ -14,17 +14,14 @@ import Foundation
 import UIKit
 
 struct ItemModel {
-
     struct Configuration {
-
         let alignment: ChatItemAlignment
 
         let preferredSize: CGSize
 
         let calculatedSize: CGSize?
 
         let interItemSpacing: CGFloat
-
     }
 
     let id: UUID
@@ -72,5 +69,4 @@ struct ItemModel {
         self.calculatedSize = nil
         preferredSize = calculatedSize
     }
-
 }

ChatLayout/Classes/Core/Model/ItemPath.swift

@@ -18,7 +18,6 @@ import Foundation
 /// On an iPhone X, compiled with -Os optimizations, it's about 35x faster to initialize this struct
 /// compared to an `IndexPath`.
 struct ItemPath: Hashable {
-
     let section: Int
 
     let item: Int
@@ -36,5 +35,4 @@ struct ItemPath: Hashable {
         section = indexPath.section
         item = indexPath.item
     }
-
 }