patch bubble

yobble/Views/Chat/PrivateChatView.swift

@@ -162,13 +162,13 @@ struct PrivateChatView: View {
                         .scaleEffect(x: 1, y: -1, anchor: .center)
                 }
 
-                ForEach(viewModel.messages.reversed()) { message in
-                    messageRow(for: message)
-                        .id(message.id)
+                ForEach(decoratedMessages.reversed()) { decoratedMessage in
+                    messageRow(for: decoratedMessage)
+                        .id(decoratedMessage.id)
                         .scaleEffect(x: 1, y: -1, anchor: .center)
                         .onAppear {
                             guard hasPositionedToBottom else { return }
-                            viewModel.loadMoreIfNeeded(for: message)
+                            viewModel.loadMoreIfNeeded(for: decoratedMessage.message)
                         }
                 }
 
@@ -236,19 +236,28 @@ struct PrivateChatView: View {
         .frame(maxWidth: .infinity, maxHeight: .infinity)
     }
 
-    private func messageRow(for message: MessageItem) -> some View {
+    private func messageRow(for decoratedMessage: DecoratedMessage) -> some View {
+        let message = decoratedMessage.message
         let isCurrentUser = currentUserId.map { $0 == message.senderId } ?? false
         return HStack(alignment: .bottom, spacing: 8) {
             if isCurrentUser { Spacer(minLength: 32) }
 
-            messageBubble(for: message, isCurrentUser: isCurrentUser)
+            messageBubble(
+                for: message,
+                decorations: decoratedMessage,
+                isCurrentUser: isCurrentUser
+            )
 
             if !isCurrentUser { Spacer(minLength: 32) }
         }
         .padding(.horizontal, 8)
     }
 
-    private func messageBubble(for message: MessageItem, isCurrentUser: Bool) -> some View {
+    private func messageBubble(
+        for message: MessageItem,
+        decorations: DecoratedMessage,
+        isCurrentUser: Bool
+    ) -> some View {
         let timeText = timestamp(for: message)
 
         let bubbleColor = isCurrentUser ? Color.accentColor : Color(.secondarySystemBackground)
@@ -268,7 +277,10 @@ struct PrivateChatView: View {
         .padding(.vertical, 10)
         .padding(.horizontal, 12)
         .background(
-            MessageBubbleShape()
+            MessageBubbleShape(
+                showHorns: decorations.showHorns,
+                showLegs: decorations.showLegs
+            )
                 .fill(bubbleColor)
         )
         .frame(maxWidth: messageBubbleMaxWidth, alignment: isCurrentUser ? .trailing : .leading)
@@ -306,6 +318,31 @@ struct PrivateChatView: View {
         return content
     }
 
+    private var decoratedMessages: [DecoratedMessage] {
+        let messages = viewModel.messages
+        guard !messages.isEmpty else { return [] }
+
+        var result: [DecoratedMessage] = []
+        result.reserveCapacity(messages.count)
+
+        for (index, message) in messages.enumerated() {
+            let previousSender = index > 0 ? messages[index - 1].senderId : nil
+            let nextSender = index < messages.count - 1 ? messages[index + 1].senderId : nil
+
+            let showHorns = previousSender != message.senderId
+            let showLegs = nextSender != message.senderId
+
+            result.append(
+                DecoratedMessage(
+                    message: message,
+                    showHorns: showHorns,
+                    showLegs: showLegs
+                )
+            )
+        }
+        return result
+    }
+
     private func errorBanner(message: String) -> some View {
         HStack {
             Image(systemName: "exclamationmark.triangle.fill")
@@ -769,6 +806,15 @@ private var headerPlaceholderAvatar: some View {
 }
 
 
+/// Helper model that stores a message alongside horn/leg flags for grouping sequences.
+private struct DecoratedMessage: Identifiable {
+    let message: MessageItem
+    let showHorns: Bool
+    let showLegs: Bool
+
+    var id: MessageItem.ID { message.id }
+}
+
 /// Decorative bubble with two horns on top and two legs on bottom to mimic cartoon-style speech clouds.
 private struct MessageBubbleShape: Shape {
     var cornerRadius: CGFloat = 18
@@ -778,6 +824,8 @@ private struct MessageBubbleShape: Shape {
     var legHeight: CGFloat = 6
     var legWidth: CGFloat = 18
     var legSpacing: CGFloat = 14
+    var showHorns: Bool = true
+    var showLegs: Bool = true
 
     func path(in rect: CGRect) -> Path {
         var path = Path()
@@ -791,17 +839,11 @@ private struct MessageBubbleShape: Shape {
 
         let horizontalSpan = max(0, rect.width - 2 * radius)
 
-        let hornsEnabled = horizontalSpan > 0.5
-        let legsEnabled = horizontalSpan > 0.5
+        let hornsEnabled = showHorns && horizontalSpan > 0.5
+        let legsEnabled = showLegs && horizontalSpan > 0.5
 
-        func clampedFeatureWidth(targetWidth: CGFloat) -> CGFloat {
-            guard horizontalSpan > 0 else { return 0 }
-            let preferredWidth = max(horizontalSpan * 0.25, targetWidth)
-            return min(preferredWidth, min(targetWidth, horizontalSpan / 2))
-        }
-
-        let effectiveHornWidth = hornsEnabled ? clampedFeatureWidth(targetWidth: hornWidth) : 0
-        let effectiveLegWidth = legsEnabled ? clampedFeatureWidth(targetWidth: legWidth) : 0
+        let effectiveHornWidth = hornsEnabled ? min(hornWidth, horizontalSpan / 2) : 0
+        let effectiveLegWidth = legsEnabled ? min(legWidth, horizontalSpan / 2) : 0
 
         let hornSpacingCandidate = max(horizontalSpan - effectiveHornWidth * 2, 0) / 2
         let legSpacingCandidate = max(horizontalSpan - effectiveLegWidth * 2, 0) / 2