Removed the inline span builder code from messageinput

packages/stream_chat_flutter_core/lib/src/message_input_controller.dart

@@ -19,37 +19,37 @@ class MessageInputController extends ValueNotifier<Message> {
   /// message.
   factory MessageInputController({
     Message? message,
-    Map<RegExp, InlineSpanBuilder>? textPatternSpan,
+    Map<RegExp, TextStyleBuilder>? textPatternStyle,
   }) =>
       MessageInputController._(
         initialMessage: message ?? Message(),
-        textPatternSpan: textPatternSpan,
+        textPatternStyle: textPatternStyle,
       );
 
   /// Creates a controller for an editable text field from an initial [text].
   factory MessageInputController.fromText(
     String? text, {
-    Map<RegExp, InlineSpanBuilder>? textPatternSpan,
+    Map<RegExp, TextStyleBuilder>? textPatternStyle,
   }) =>
       MessageInputController._(
         initialMessage: Message(text: text),
-        textPatternSpan: textPatternSpan,
+        textPatternStyle: textPatternStyle,
       );
 
   /// Creates a controller for an editable text field from initial
   /// [attachments].
   factory MessageInputController.fromAttachments(
     List<Attachment> attachments, {
-    Map<RegExp, InlineSpanBuilder>? textPatternSpan,
+    Map<RegExp, TextStyleBuilder>? textPatternStyle,
   }) =>
       MessageInputController._(
         initialMessage: Message(attachments: attachments),
-        textPatternSpan: textPatternSpan,
+        textPatternStyle: textPatternStyle,
       );
 
   MessageInputController._({
     required Message initialMessage,
-    Map<RegExp, InlineSpanBuilder>? textPatternSpan,
+    Map<RegExp, TextStyleBuilder>? textPatternStyle,
   })  : _textEditingController = MessageTextFieldController.fromValue(
           initialMessage.text == null
               ? const TextEditingValue()
@@ -57,7 +57,7 @@ class MessageInputController extends ValueNotifier<Message> {
                   text: initialMessage.text!,
                   composing: TextRange.collapsed(initialMessage.text!.length),
                 ),
-          textPatternSpan: textPatternSpan,
+          textPatternStyle: textPatternStyle,
         ),
         _initialMessage = initialMessage,
         super(initialMessage) {

packages/stream_chat_flutter_core/lib/src/message_text_field_controller.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 
-/// A function that takes a [BuildContext] and returns an [InlineSpan].
-typedef InlineSpanBuilder = InlineSpan Function(
+/// A function that takes a [BuildContext] and returns a [TextStyle].
+typedef TextStyleBuilder = TextStyle? Function(
   BuildContext context,
   String text,
 );
@@ -11,17 +11,17 @@ class MessageTextFieldController extends TextEditingController {
   /// Returns a new MessageTextFieldController
   MessageTextFieldController({
     String? text,
-    this.textPatternSpan,
+    this.textPatternStyle,
   }) : super(text: text);
 
   /// Returns a new MessageTextFieldController with the given text [value].
   MessageTextFieldController.fromValue(
     TextEditingValue? value, {
-    this.textPatternSpan,
+    this.textPatternStyle,
   }) : super.fromValue(value);
 
   /// A map of style to apply to the text matching the RegExp patterns.
-  final Map<RegExp, InlineSpanBuilder>? textPatternSpan;
+  final Map<RegExp, TextStyleBuilder>? textPatternStyle;
 
   /// Builds a [TextSpan] from the current text,
   /// highlighting the matches for [textPatternStyle].
@@ -31,7 +31,7 @@ class MessageTextFieldController extends TextEditingController {
     TextStyle? style,
     required bool withComposing,
   }) {
-    final pattern = textPatternSpan;
+    final pattern = textPatternStyle;
     if (pattern == null || pattern.isEmpty) {
       return super.buildTextSpan(
         context: context,
@@ -45,10 +45,13 @@ class MessageTextFieldController extends TextEditingController {
       onMatch: (match) {
         final text = match[0]!;
         final key = pattern.keys.firstWhere((it) => it.hasMatch(text));
-        return pattern[key]?.call(context, text) ??
-            TextSpan(
-              text: text,
-            );
+        return TextSpan(
+          text: text,
+          style: pattern[key]?.call(
+            context,
+            text,
+          ),
+        );
       },
     );
   }
@@ -57,10 +60,10 @@ class MessageTextFieldController extends TextEditingController {
 extension _TextSpanX on TextSpan {
   TextSpan splitMapJoin(
     Pattern pattern, {
-    InlineSpan Function(Match)? onMatch,
-    InlineSpan Function(InlineSpan)? onNonMatch,
+    TextSpan Function(Match)? onMatch,
+    TextSpan Function(TextSpan)? onNonMatch,
   }) {
-    final children = <InlineSpan>[];
+    final children = <TextSpan>[];
 
     toPlainText().splitMapJoin(
       pattern,