Fix for 1.1.11

Author: Eugene Kazaev

ChatLayout.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'ChatLayout'
-  s.version          = '1.1.11'
+  s.version          = '1.1.12'
   s.summary          = 'Chat UI Library. It uses custom UICollectionViewLayout to provide you full control over the presentation.'
   s.swift_version    = '5.2'
 

ChatLayout/Classes/Core/Model/StateController.swift

@@ -631,31 +631,39 @@ final class StateController {
                     break
                 }
 
-                guard let firstMatchIndex = Array(section.items.enumerated()).binarySearch(predicate: { itemIndex, _ in
-                    let itemPath = ItemPath(item: itemIndex, section: sectionIndex)
-                    guard let itemFrame = self.itemFrame(for: itemPath, kind: .cell, at: state, isFinal: true) else {
-                        return .orderedDescending
-                    }
-                    if itemFrame.intersects(visibleRect) {
-                        return .orderedSame
-                    }
-                    if itemFrame.minY > visibleRect.maxY {
-                        return .orderedDescending
-                    }
-                    return .orderedAscending
-                }) else {
-                    break
-                }
-                var startingIndex = firstMatchIndex
-                for itemIndex in (0..<firstMatchIndex).reversed() {
-                    let itemPath = ItemPath(item: itemIndex, section: sectionIndex)
-                    guard let itemFrame = itemFrame(for: itemPath, kind: .cell, at: state, isFinal: true) else {
-                        continue
-                    }
-                    guard itemFrame.maxY >= visibleRect.minY else {
-                        break
+                var startingIndex = 0
+                // If header is not visible
+                if traverseState == .notFound {
+                    // Find if any of the items of the section is visible
+                    if let firstMatchIndex = Array(section.items.enumerated()).binarySearch(predicate: { itemIndex, _ in
+                        let itemPath = ItemPath(item: itemIndex, section: sectionIndex)
+                        guard let itemFrame = self.itemFrame(for: itemPath, kind: .cell, at: state, isFinal: true) else {
+                            return .orderedDescending
+                        }
+                        if itemFrame.intersects(visibleRect) {
+                            return .orderedSame
+                        }
+                        if itemFrame.minY > visibleRect.maxY {
+                            return .orderedDescending
+                        }
+                        return .orderedAscending
+                    }) {
+                        // Find first item that is visible
+                        startingIndex = firstMatchIndex
+                        for itemIndex in (0..<firstMatchIndex).reversed() {
+                            let itemPath = ItemPath(item: itemIndex, section: sectionIndex)
+                            guard let itemFrame = itemFrame(for: itemPath, kind: .cell, at: state, isFinal: true) else {
+                                continue
+                            }
+                            guard itemFrame.maxY >= visibleRect.minY else {
+                                break
+                            }
+                            startingIndex = itemIndex
+                        }
+                    } else {
+                        // Otherwise we can safely skip all the items in the section and go to footer.
+                        startingIndex = section.items.count - 1
                     }
-                    startingIndex = itemIndex
                 }
 
                 if startingIndex < section.items.count {

Example/ChatLayout/Chat/View/ChatViewController.swift

@@ -464,7 +464,7 @@ extension ChatViewController: ChatControllerDelegate {
                                       return false
                                   },
                                   onInterruptedReload: {
-                                      let positionSnapshot = ChatLayoutPositionSnapshot(indexPath: IndexPath(item: 0, section: 0), kind: .footer, edge: .bottom)
+                                      let positionSnapshot = ChatLayoutPositionSnapshot(indexPath: IndexPath(item: 0, section: sections.count - 1), kind: .footer, edge: .bottom)
                                       self.collectionView.reloadData()
                                       // We want so that user on reload appeared at the very bottom of the layout
                                       self.chatLayout.restoreContentOffset(with: positionSnapshot)

Example/Podfile.lock

@@ -1,10 +1,10 @@
 PODS:
-  - ChatLayout (1.1.10):
-    - ChatLayout/Ultimate (= 1.1.10)
-  - ChatLayout/Core (1.1.10)
-  - ChatLayout/Extras (1.1.10):
+  - ChatLayout (1.1.12):
+    - ChatLayout/Ultimate (= 1.1.12)
+  - ChatLayout/Core (1.1.12)
+  - ChatLayout/Extras (1.1.12):
     - ChatLayout/Core
-  - ChatLayout/Ultimate (1.1.10):
+  - ChatLayout/Ultimate (1.1.12):
     - ChatLayout/Core
     - ChatLayout/Extras
   - DifferenceKit (1.2.0):
@@ -35,7 +35,7 @@ EXTERNAL SOURCES:
     :path: "../"
 
 SPEC CHECKSUMS:
-  ChatLayout: 5d310eca192fd52bf44c51f668a788e9abcb126d
+  ChatLayout: 8f41f556773cc215fad67a1064ec40badcd99c83
   DifferenceKit: 5659c430bb7fe45876fa32ce5cba5d6167f0c805
   FPSCounter: 884afec377de66637808c4f52ecc3b85a404732b
   InputBarAccessoryView: 74d471ab1fa1736806be50328df79257e52865a9