[NOA-832] Add RTL language support for message positioning

Example/ChatExample.xcodeproj/project.pbxproj

@@ -49,6 +49,7 @@
 		9B49D53A263D9606008804B5 /* CustomLayoutSizeCalculator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B49D539263D9606008804B5 /* CustomLayoutSizeCalculator.swift */; };
 		9B49D542263DA6F9008804B5 /* CustomMessageContentCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B49D541263DA6F9008804B5 /* CustomMessageContentCell.swift */; };
 		9B49D547263DAA29008804B5 /* CustomTextMessageContentCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B49D546263DAA29008804B5 /* CustomTextMessageContentCell.swift */; };
+		ABCBBB1428F57513008955E4 /* InputBarAccessoryView in Frameworks */ = {isa = PBXBuildFile; productRef = ABCBBB1328F57513008955E4 /* InputBarAccessoryView */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -124,6 +125,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				13EFA5D927AC5634003002CC /* Kingfisher in Frameworks */,
+				ABCBBB1428F57513008955E4 /* InputBarAccessoryView in Frameworks */,
 				1C5433DF24C38DBF00A5383B /* SwiftUI.framework in Frameworks */,
 				13EFA5D727AC5631003002CC /* MessageKit in Frameworks */,
 			);
@@ -349,6 +351,7 @@
 			packageProductDependencies = (
 				13EFA5D627AC5631003002CC /* MessageKit */,
 				13EFA5D827AC5634003002CC /* Kingfisher */,
+				ABCBBB1328F57513008955E4 /* InputBarAccessoryView */,
 			);
 			productName = ChatExample;
 			productReference = 882B5E331CF7D4B900B6E160 /* ChatExample.app */;
@@ -426,6 +429,7 @@
 			mainGroup = 882B5E2A1CF7D4B900B6E160;
 			packageReferences = (
 				13CCA06125793E24005C19BB /* XCRemoteSwiftPackageReference "Kingfisher" */,
+				ABCBBB1228F57513008955E4 /* XCRemoteSwiftPackageReference "InputBarAccessoryView" */,
 			);
 			productRefGroup = 882B5E341CF7D4B900B6E160 /* Products */;
 			projectDirPath = "";
@@ -820,6 +824,14 @@
 				minimumVersion = 5.15.8;
 			};
 		};
+		ABCBBB1228F57513008955E4 /* XCRemoteSwiftPackageReference "InputBarAccessoryView" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/deemaze/InputBarAccessoryView.git";
+			requirement = {
+				branch = "custom-attachment-cell";
+				kind = branch;
+			};
+		};
 /* End XCRemoteSwiftPackageReference section */
 
 /* Begin XCSwiftPackageProductDependency section */
@@ -841,6 +853,11 @@
 			package = 13CCA06125793E24005C19BB /* XCRemoteSwiftPackageReference "Kingfisher" */;
 			productName = Kingfisher;
 		};
+		ABCBBB1328F57513008955E4 /* InputBarAccessoryView */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = ABCBBB1228F57513008955E4 /* XCRemoteSwiftPackageReference "InputBarAccessoryView" */;
+			productName = InputBarAccessoryView;
+		};
 /* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = 882B5E2B1CF7D4B900B6E160 /* Project object */;

Example/ChatExample.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

Package.swift

@@ -31,7 +31,7 @@ let package = Package(
         .plugin(name: "SwiftFormatPlugin", targets: ["SwiftFormatPlugin"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/nathantannar4/InputBarAccessoryView", .upToNextMajor(from: "6.1.0")),
+        .package(url: "https://github.com/deemaze/InputBarAccessoryView", branch: "custom-attachment-cell")
     ],
     targets: [
         // MARK: - MessageKit

Sources/Layout/MessageSizeCalculator.swift

@@ -123,13 +123,27 @@ open class MessageSizeCalculator: CellSizeCalculator {
   open func avatarPosition(for message: MessageType) -> AvatarPosition {
     let dataSource = messagesLayout.messagesDataSource
     let isFromCurrentSender = dataSource.isFromCurrentSender(message: message)
-    var position = isFromCurrentSender ? outgoingAvatarPosition : incomingAvatarPosition
+
+    // Check if RTL mode is active
+    let isRTL = messagesLayout.messagesCollectionView.rtlLanguageProvider?.isRTLLanguage ?? false
+
+    // In RTL, swap incoming/outgoing positions
+    var position: AvatarPosition
+    if isRTL {
+      position = isFromCurrentSender ? incomingAvatarPosition : outgoingAvatarPosition
+    } else {
+      position = isFromCurrentSender ? outgoingAvatarPosition : incomingAvatarPosition
+    }
 
     switch position.horizontal {
     case .cellTrailing, .cellLeading:
       break
     case .natural:
-      position.horizontal = isFromCurrentSender ? .cellTrailing : .cellLeading
+      if isRTL {
+        position.horizontal = isFromCurrentSender ? .cellLeading : .cellTrailing
+      } else {
+        position.horizontal = isFromCurrentSender ? .cellTrailing : .cellLeading
+      }
     }
     return position
   }
@@ -157,7 +171,16 @@ open class MessageSizeCalculator: CellSizeCalculator {
   open func cellTopLabelAlignment(for message: MessageType) -> LabelAlignment {
     let dataSource = messagesLayout.messagesDataSource
     let isFromCurrentSender = dataSource.isFromCurrentSender(message: message)
-    return isFromCurrentSender ? outgoingCellTopLabelAlignment : incomingCellTopLabelAlignment
+
+    // Check if RTL mode is active
+    let isRTL = messagesLayout.messagesCollectionView.rtlLanguageProvider?.isRTLLanguage ?? false
+
+    // In RTL, swap incoming/outgoing alignments
+    if isRTL {
+      return isFromCurrentSender ? incomingCellTopLabelAlignment : outgoingCellTopLabelAlignment
+    } else {
+      return isFromCurrentSender ? outgoingCellTopLabelAlignment : incomingCellTopLabelAlignment
+    }
   }
 
   // MARK: - Top message Label
@@ -179,7 +202,16 @@ open class MessageSizeCalculator: CellSizeCalculator {
 
     let dataSource = messagesLayout.messagesDataSource
     let isFromCurrentSender = dataSource.isFromCurrentSender(message: message)
-    return isFromCurrentSender ? outgoingMessageTopLabelAlignment : incomingMessageTopLabelAlignment
+
+    // Check if RTL mode is active
+    let isRTL = collectionView.rtlLanguageProvider?.isRTLLanguage ?? false
+
+    // In RTL, swap incoming/outgoing alignments
+    if isRTL {
+      return isFromCurrentSender ? incomingMessageTopLabelAlignment : outgoingMessageTopLabelAlignment
+    } else {
+      return isFromCurrentSender ? outgoingMessageTopLabelAlignment : incomingMessageTopLabelAlignment
+    }
   }
 
   // MARK: - Message time label
@@ -205,7 +237,16 @@ open class MessageSizeCalculator: CellSizeCalculator {
   open func cellBottomLabelAlignment(for message: MessageType) -> LabelAlignment {
     let dataSource = messagesLayout.messagesDataSource
     let isFromCurrentSender = dataSource.isFromCurrentSender(message: message)
-    return isFromCurrentSender ? outgoingCellBottomLabelAlignment : incomingCellBottomLabelAlignment
+
+    // Check if RTL mode is active
+    let isRTL = messagesLayout.messagesCollectionView.rtlLanguageProvider?.isRTLLanguage ?? false
+
+    // In RTL, swap incoming/outgoing alignments
+    if isRTL {
+      return isFromCurrentSender ? incomingCellBottomLabelAlignment : outgoingCellBottomLabelAlignment
+    } else {
+      return isFromCurrentSender ? outgoingCellBottomLabelAlignment : incomingCellBottomLabelAlignment
+    }
   }
 
   // MARK: - Bottom Message Label
@@ -227,15 +268,33 @@ open class MessageSizeCalculator: CellSizeCalculator {
 
     let dataSource = messagesLayout.messagesDataSource
     let isFromCurrentSender = dataSource.isFromCurrentSender(message: message)
-    return isFromCurrentSender ? outgoingMessageBottomLabelAlignment : incomingMessageBottomLabelAlignment
+
+    // Check if RTL mode is active
+    let isRTL = collectionView.rtlLanguageProvider?.isRTLLanguage ?? false
+
+    // In RTL, swap incoming/outgoing alignments
+    if isRTL {
+      return isFromCurrentSender ? incomingMessageBottomLabelAlignment : outgoingMessageBottomLabelAlignment
+    } else {
+      return isFromCurrentSender ? outgoingMessageBottomLabelAlignment : incomingMessageBottomLabelAlignment
+    }
   }
 
   // MARK: - MessageContainer
 
   open func messageContainerPadding(for message: MessageType) -> UIEdgeInsets {
     let dataSource = messagesLayout.messagesDataSource
     let isFromCurrentSender = dataSource.isFromCurrentSender(message: message)
-    return isFromCurrentSender ? outgoingMessagePadding : incomingMessagePadding
+
+    // Check if RTL mode is active
+    let isRTL = messagesLayout.messagesCollectionView.rtlLanguageProvider?.isRTLLanguage ?? false
+
+    // In RTL, swap incoming/outgoing paddings
+    if isRTL {
+      return isFromCurrentSender ? incomingMessagePadding : outgoingMessagePadding
+    } else {
+      return isFromCurrentSender ? outgoingMessagePadding : incomingMessagePadding
+    }
   }
 
   open func messageContainerSize(for _: MessageType, at _: IndexPath) -> CGSize {

Sources/Views/Cells/MessageContentCell.swift

@@ -56,6 +56,7 @@ open class MessageContentCell: MessageCollectionViewCell {
   open var cellTopLabel: InsetLabel = {
     let label = InsetLabel()
     label.numberOfLines = 0
+    label.adjustsFontForContentSizeCategory = true
     label.textAlignment = .center
     return label
   }()
@@ -64,6 +65,7 @@ open class MessageContentCell: MessageCollectionViewCell {
   open var cellBottomLabel: InsetLabel = {
     let label = InsetLabel()
     label.numberOfLines = 0
+    label.adjustsFontForContentSizeCategory = true
     label.textAlignment = .center
     return label
   }()
@@ -72,13 +74,15 @@ open class MessageContentCell: MessageCollectionViewCell {
   open var messageTopLabel: InsetLabel = {
     let label = InsetLabel()
     label.numberOfLines = 0
+    label.adjustsFontForContentSizeCategory = true
     return label
   }()
 
   /// The bottom label of the messageBubble.
   open var messageBottomLabel: InsetLabel = {
     let label = InsetLabel()
     label.numberOfLines = 0
+    label.adjustsFontForContentSizeCategory = true
     return label
   }()
 

Sources/Views/MessagesCollectionView.swift

@@ -23,6 +23,12 @@
 import Foundation
 import UIKit
 
+/// Protocol to provide RTL (Right-to-Left) language support for MessageKit
+public protocol RTLLanguageProvider: AnyObject {
+    /// Returns `true` if the current language is RTL (Right-to-Left)
+    var isRTLLanguage: Bool { get }
+}
+
 open class MessagesCollectionView: UICollectionView {
   // MARK: Lifecycle
 
@@ -55,6 +61,8 @@ open class MessagesCollectionView: UICollectionView {
 
   open weak var messageCellDelegate: MessageCellDelegate?
 
+  open weak var rtlLanguageProvider: RTLLanguageProvider?
+
   open var isTypingIndicatorHidden: Bool {
     messagesCollectionViewFlowLayout.isTypingIndicatorViewHidden
   }