Add "reply in thread" timeline item action menu entry.

ElementX/Sources/Screens/Timeline/TimelineInteractionHandler.swift

@@ -24,6 +24,7 @@ enum TimelineInteractionHandlerAction {
     case displayErrorToast(String)
     
     case viewInRoomTimeline(eventID: String)
+    case displayThread(itemID: TimelineItemIdentifier)
 }
 
 /// The interaction handler groups logic for dealing with various actions the user can take on a timeline's
@@ -162,6 +163,8 @@ class TimelineInteractionHandler {
             let replyDetails = TimelineItemReplyDetails.loaded(sender: eventTimelineItem.sender, eventID: eventID, eventContent: replyInfo.type)
             
             actionsSubject.send(.composer(action: .setMode(mode: .reply(eventID: eventID, replyDetails: replyDetails, isThread: replyInfo.isThread))))
+        case .replyInThread:
+            actionsSubject.send(.displayThread(itemID: eventTimelineItem.id))
         case .forward(let itemID):
             actionsSubject.send(.displayMessageForwarding(itemID: itemID))
         case .viewSource:

ElementX/Sources/Screens/Timeline/TimelineViewModel.swift

@@ -517,6 +517,8 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
                     state.bindings.debugInfo = debugInfo
                 case .viewInRoomTimeline(let eventID):
                     actionsSubject.send(.viewInRoomTimeline(eventID: eventID))
+                case .displayThread(let itemID):
+                    actionsSubject.send(.displayThread(itemID: itemID))
                 }
             }
             .store(in: &cancellables)
@@ -531,6 +533,10 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
             .weakAssign(to: \.state.isViewSourceEnabled, on: self)
             .store(in: &cancellables)
         
+        appSettings.$threadsEnabled
+            .weakAssign(to: \.state.areThreadsEnabled, on: self)
+            .store(in: &cancellables)
+        
         clientProxy.timelineMediaVisibilityPublisher
             .removeDuplicates()
             .flatMap { [weak self] timelineMediaVisibility -> AnyPublisher<Bool, Never> in

ElementX/Sources/Screens/Timeline/View/ItemMenu/TimelineItemMenu.swift

@@ -344,6 +344,7 @@ struct TimelineItemMenu_Previews: PreviewProvider, TestablePreview {
                                                       pinnedEventIDs: [],
                                                       isDM: true,
                                                       isViewSourceEnabled: true,
+                                                      areThreadsEnabled: true,
                                                       timelineKind: .live,
                                                       emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings))
         guard let actions = provider.makeActions() else { return nil }

ElementX/Sources/Screens/Timeline/View/ItemMenu/TimelineItemMenuAction.swift

@@ -65,6 +65,7 @@ enum TimelineItemMenuAction: Identifiable, Hashable {
     case copyPermalink
     case redact
     case reply(isThread: Bool)
+    case replyInThread
     case forward(itemID: TimelineItemIdentifier)
     case viewSource
     case report
@@ -159,6 +160,8 @@ enum TimelineItemMenuAction: Identifiable, Hashable {
             Label(L10n.actionCopyLinkToMessage, icon: \.link)
         case .reply(let isThread):
             Label(isThread ? L10n.actionReplyInThread : L10n.actionReply, icon: \.reply)
+        case .replyInThread:
+            Label(L10n.actionReplyInThread, icon: \.threads)
         case .forward:
             Label(L10n.actionForward, icon: \.forward)
         case .redact:

ElementX/Sources/Screens/Timeline/View/ItemMenu/TimelineItemMenuActionProvider.swift

@@ -16,6 +16,7 @@ struct TimelineItemMenuActionProvider {
     let pinnedEventIDs: Set<String>
     let isDM: Bool
     let isViewSourceEnabled: Bool
+    let areThreadsEnabled: Bool
     let timelineKind: TimelineKind
     let emojiProvider: EmojiProviderProtocol
     
@@ -52,6 +53,10 @@ struct TimelineItemMenuActionProvider {
             } else {
                 actions.append(.reply(isThread: false))
             }
+            
+            if areThreadsEnabled, !timelineKind.isThread {
+                actions.append(.replyInThread)
+            }
         }
         
         if item.isForwardable {

ElementX/Sources/Screens/Timeline/View/Style/TimelineItemBubbledStylerView.swift

@@ -156,6 +156,7 @@ struct TimelineItemBubbledStylerView<Content: View>: View {
                                                               pinnedEventIDs: context.viewState.pinnedEventIDs,
                                                               isDM: context.viewState.isDirectOneToOneRoom,
                                                               isViewSourceEnabled: context.viewState.isViewSourceEnabled,
+                                                              areThreadsEnabled: context.viewState.areThreadsEnabled,
                                                               timelineKind: context.viewState.timelineKind,
                                                               emojiProvider: context.viewState.emojiProvider)
                 TimelineItemMacContextMenu(item: timelineItem, actionProvider: provider) { action in

ElementX/Sources/Screens/Timeline/View/TimelineView.swift

@@ -33,6 +33,7 @@ struct TimelineView: View {
                                                              pinnedEventIDs: timelineContext.viewState.pinnedEventIDs,
                                                              isDM: timelineContext.viewState.isDirectOneToOneRoom,
                                                              isViewSourceEnabled: timelineContext.viewState.isViewSourceEnabled,
+                                                             areThreadsEnabled: timelineContext.viewState.areThreadsEnabled,
                                                              timelineKind: timelineContext.viewState.timelineKind,
                                                              emojiProvider: timelineContext.viewState.emojiProvider)
                     .makeActions()