Fix the toggle style button

lib/src/widgets/quill/quill_controller.dart

@@ -4,6 +4,7 @@ import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 import 'package:html2md/html2md.dart' as html2md;
 import 'package:markdown/markdown.dart' as md;
+import 'package:meta/meta.dart';
 
 import '../../../markdown_quill.dart';
 import '../../../quill_delta.dart';
@@ -16,6 +17,7 @@ import '../../models/structs/doc_change.dart';
 import '../../models/structs/image_url.dart';
 import '../../models/structs/offset_value.dart';
 import '../../utils/delta.dart';
+import '../toolbar/buttons/toggle_style_button.dart';
 
 typedef ReplaceTextCallback = bool Function(int index, int len, Object? data);
 typedef DeleteCallback = void Function(int cursorPosition, bool forward);
@@ -54,6 +56,7 @@ class QuillController extends ChangeNotifier {
     notifyListeners();
   }
 
+  @experimental
   void setContents(
     Delta delta, {
     ChangeSource changeSource = ChangeSource.local,
@@ -84,6 +87,17 @@ class QuillController extends ChangeNotifier {
   /// The current font size, null to use the default one
   String? get selectedFontSize => _selectedFontSize;
 
+  /// For the [QuillToolbarToggleStyleButton]
+  final Map<Attribute, bool?> _selectedStyles = {};
+
+  /// For the [QuillToolbarToggleStyleButton]
+  Map<Attribute, bool?> get selectedStyles => _selectedStyles;
+
+  /// For the [QuillToolbarToggleStyleButton]
+  void selectStyle(Attribute attribute, bool value) {
+    _selectedStyles[attribute] = value;
+  }
+
   void selectFontSize(String? newFontSize) {
     _selectedFontSize = newFontSize;
   }

lib/src/widgets/raw_editor/raw_editor_state_text_input_client_mixin.dart

@@ -211,9 +211,7 @@ mixin RawEditorStateTextInputClientMixin on EditorState
       // TODO: There is a bug here, the first character is not being formatted
 
       if (widget.configurations.controller.selectedFontFamily != null) {
-        widget.configurations.controller.formatText(
-          diff.start,
-          diff.deleted.length,
+        widget.configurations.controller.formatSelection(
           Attribute.fromKeyValue(
             Attribute.font.key,
             widget.configurations.controller.selectedFontFamily,
@@ -224,9 +222,7 @@ mixin RawEditorStateTextInputClientMixin on EditorState
       // TODO: A bug here too
 
       if (widget.configurations.controller.selectedFontSize != null) {
-        widget.configurations.controller.formatText(
-          diff.start,
-          diff.deleted.length,
+        widget.configurations.controller.formatSelection(
           Attribute.fromKeyValue(
             Attribute.size.key,
             widget.configurations.controller.selectedFontSize == '0'
@@ -236,6 +232,12 @@ mixin RawEditorStateTextInputClientMixin on EditorState
           ),
         );
       }
+
+      widget.configurations.controller.selectedStyles.forEach((key, value) {
+        if (value ?? false) {
+          widget.configurations.controller.formatSelection(key);
+        }
+      });
     }
   }
 

lib/src/widgets/toolbar/buttons/toggle_style_button.dart

@@ -221,9 +221,13 @@ class QuillToolbarToggleStyleButtonState
   }
 
   void _toggleAttribute() {
-    controller.formatSelection(
-      _isToggled! ? Attribute.clone(widget.attribute, null) : widget.attribute,
-    );
+    controller
+      ..formatSelection(
+        (_isToggled ?? false)
+            ? Attribute.clone(widget.attribute, null)
+            : widget.attribute,
+      )
+      ..selectStyle(widget.attribute, _isToggled == true ? true : false);
   }
 }
 
@@ -253,5 +257,6 @@ Widget defaultToggleStyleButtonBuilder(
     isFilled: isEnabled ? isToggled == true : false,
     onPressed: onPressed,
     afterPressed: afterPressed,
-      padding: iconTheme?.padding);
+    padding: iconTheme?.padding,
+  );
 }