make message bubble text selectable

Author: alexrozanski

Diff for: LlamaChat.xcodeproj/project.pbxproj

@@ -92,6 +92,7 @@
 		82F14EA329E45C5D001E9C1E /* AvatarPickerView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 82F14EA229E45C5D001E9C1E /* AvatarPickerView.swift */; };
 		82F14EA629E46454001E9C1E /* llama in Frameworks */ = {isa = PBXBuildFile; productRef = 82F14EA529E46454001E9C1E /* llama */; };
 		82F14EA829E4D2DD001E9C1E /* Credits.rtf in Resources */ = {isa = PBXBuildFile; fileRef = 82F14EA729E4D2DD001E9C1E /* Credits.rtf */; };
+		82F76A0529E6B6E0007B8A2D /* Text+TextSelection.swift in Sources */ = {isa = PBXBuildFile; fileRef = 82F76A0429E6B6E0007B8A2D /* Text+TextSelection.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -181,6 +182,7 @@
 		82E7FFE829DE5B7100BF0251 /* ConfigureLocalModelSizePickerViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConfigureLocalModelSizePickerViewModel.swift; sourceTree = "<group>"; };
 		82F14EA229E45C5D001E9C1E /* AvatarPickerView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AvatarPickerView.swift; sourceTree = "<group>"; };
 		82F14EA729E4D2DD001E9C1E /* Credits.rtf */ = {isa = PBXFileReference; lastKnownFileType = text.rtf; path = Credits.rtf; sourceTree = "<group>"; };
+		82F76A0429E6B6E0007B8A2D /* Text+TextSelection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Text+TextSelection.swift"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -201,6 +203,7 @@
 			children = (
 				821B253829DFA39600CF1001 /* NSApplication+Settings.swift */,
 				821B255629E1F05000CF1001 /* NSScrollView+Bottom.swift */,
+				82F76A0429E6B6E0007B8A2D /* Text+TextSelection.swift */,
 			);
 			path = extensions;
 			sourceTree = "<group>";
@@ -700,6 +703,7 @@
 				82718D0429D368EA00545C32 /* MessagesView.swift in Sources */,
 				82914CC529D6E69C00858B2C /* BorderlessTextField.swift in Sources */,
 				82A7B4EB29DE484600BCBB6B /* ConfigureLocalGgmlModelSettingsViewModel.swift in Sources */,
+				82F76A0529E6B6E0007B8A2D /* Text+TextSelection.swift in Sources */,
 				82E7FFE729DE5B1F00BF0251 /* ConfigureLocalModelSizePickerView.swift in Sources */,
 				82E3F1DC29DF37DA003F0368 /* AddSourceViewModel.swift in Sources */,
 				82914CCA29D76A2F00858B2C /* Sender.swift in Sources */,

Diff for: LlamaChat/extensions/Text+TextSelection.swift

@@ -0,0 +1,32 @@
+//
+//  Text+TextSelection.swift
+//  LlamaChat
+//
+//  Created by Alex Rozanski on 12/04/2023.
+//
+
+import SwiftUI
+
+struct EnabledTextSelection: ViewModifier {
+  func body(content: Content) -> some View {
+    content
+      .textSelection(.enabled)
+  }
+}
+
+struct DisabledTextSelection: ViewModifier {
+  func body(content: Content) -> some View {
+    content
+      .textSelection(.disabled)
+  }
+}
+
+extension View {
+  @ViewBuilder func textSelectionEnabled(_ flag: Bool) -> some View {
+    if flag {
+      modifier(EnabledTextSelection())
+    } else {
+      modifier(DisabledTextSelection())
+    }
+  }
+}

Diff for: LlamaChat/ui/chat/messages/GeneratedMessageView.swift

@@ -34,6 +34,7 @@ struct GeneratedMessageView: View {
           TypingBubbleContentView()
         case .generating, .finished, .cancelled, .error:
           Text(viewModel.content)
+            .textSelectionEnabled(viewModel.canCopyContents.value)
         }
       }
     }

Diff for: LlamaChat/ui/chat/messages/MessagesView.swift

@@ -11,10 +11,11 @@ struct MessageView: View {
   @ObservedObject var viewModel: ObservableMessageViewModel
   let availableWidth: Double
 
-  @ViewBuilder var messageView: some View {
+  var body: some View {
     if let staticMessageViewModel: StaticMessageViewModel = viewModel.get() {
       MessageBubbleView(sender: staticMessageViewModel.sender, style: .regular, isError: staticMessageViewModel.isError, availableWidth: availableWidth * 0.8) {
         Text(staticMessageViewModel.content)
+          .textSelectionEnabled(viewModel.canCopyContents)
       }
     } else if let generatedMessageViewModel: GeneratedMessageViewModel = viewModel.get() {
       GeneratedMessageView(viewModel: generatedMessageViewModel, availableWidth: availableWidth * 0.8)
@@ -29,17 +30,6 @@ struct MessageView: View {
       #endif
     }
   }
-
-  var body: some View {
-    messageView
-      .contextMenu {
-        if viewModel.canCopyContents {
-          Button("Copy") {
-            viewModel.copyContents()
-          }
-        }
-      }
-  }
 }
 
 struct MessagesView: View {