From 34cb22fa88705c834e1582db4324d66bcd1955b5 Mon Sep 17 00:00:00 2001
From: provokateurin <kate@provokateurin.de>
Date: Fri, 8 Nov 2024 19:09:27 +0100
Subject: [PATCH] fix(talk_app): Ignore invalid text selection when searching
 mentions

Signed-off-by: provokateurin <kate@provokateurin.de>
---
 .../talk_app/lib/src/widgets/message_input.dart      | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/packages/neon_framework/packages/talk_app/lib/src/widgets/message_input.dart b/packages/neon_framework/packages/talk_app/lib/src/widgets/message_input.dart
index 58817eaad6f..34cff42d209 100644
--- a/packages/neon_framework/packages/talk_app/lib/src/widgets/message_input.dart
+++ b/packages/neon_framework/packages/talk_app/lib/src/widgets/message_input.dart
@@ -170,12 +170,18 @@ class _TalkMessageInputState extends State<TalkMessageInput> {
       controller: controller,
       focusNode: focusNode,
       suggestionsCallback: (_) async {
-        final cursor = controller.selection.start;
-        if (controller.text.isEmpty || cursor != controller.selection.end) {
+        final selection = controller.selection;
+        if (!selection.isValid) {
           return [];
         }
 
-        var matchingPart = controller.text.substring(0, cursor);
+        final cursor = selection.start;
+        final text = controller.text;
+        if (text.isEmpty || cursor != selection.end) {
+          return [];
+        }
+
+        var matchingPart = text.substring(0, cursor);
         final index = matchingPart.lastIndexOf(' ') + 1;
         matchingPart = matchingPart.substring(index);
         if (!matchingPart.startsWith('@') || matchingPart.isEmpty) {