fix: regression selected options not scrolling automatically (#5058)

frontend/appflowy_flutter/lib/plugins/database/widgets/cell_editor/select_option_cell_editor.dart

@@ -33,7 +33,8 @@ class SelectOptionCellEditor extends StatefulWidget {
 }
 
 class _SelectOptionCellEditorState extends State<SelectOptionCellEditor> {
-  final TextEditingController textEditingController = TextEditingController();
+  final textEditingController = TextEditingController();
+  final scrollController = ScrollController();
   final popoverMutex = PopoverMutex();
   late final bloc = SelectOptionCellEditorBloc(
     cellController: widget.cellController,
@@ -86,6 +87,7 @@ class _SelectOptionCellEditorState extends State<SelectOptionCellEditor> {
   void dispose() {
     popoverMutex.dispose();
     textEditingController.dispose();
+    scrollController.dispose();
     bloc.close();
     focusNode.dispose();
     super.dispose();
@@ -101,6 +103,7 @@ class _SelectOptionCellEditorState extends State<SelectOptionCellEditor> {
           children: [
             _TextField(
               textEditingController: textEditingController,
+              scrollController: scrollController,
               focusNode: focusNode,
               popoverMutex: popoverMutex,
             ),
@@ -209,11 +212,13 @@ class _OptionList extends StatelessWidget {
 class _TextField extends StatelessWidget {
   const _TextField({
     required this.textEditingController,
+    required this.scrollController,
     required this.focusNode,
     required this.popoverMutex,
   });
 
   final TextEditingController textEditingController;
+  final ScrollController scrollController;
   final FocusNode focusNode;
   final PopoverMutex popoverMutex;
 
@@ -237,6 +242,7 @@ class _TextField extends StatelessWidget {
               selectedOptionMap: optionMap,
               distanceToText: _editorPanelWidth * 0.7,
               textController: textEditingController,
+              scrollController: scrollController,
               textSeparators: const [','],
               onClick: () => popoverMutex.close(),
               newText: (text) {

frontend/appflowy_flutter/lib/plugins/database/widgets/cell_editor/select_option_text_field.dart

@@ -20,6 +20,7 @@ class SelectOptionTextField extends StatefulWidget {
     required this.newText,
     required this.onPaste,
     required this.onRemove,
+    this.scrollController,
     this.onClick,
   });
 
@@ -28,6 +29,7 @@ class SelectOptionTextField extends StatefulWidget {
   final double distanceToText;
   final List<String> textSeparators;
   final TextEditingController textController;
+  final ScrollController? scrollController;
   final FocusNode focusNode;
 
   final Function() onSubmitted;
@@ -46,10 +48,21 @@ class _SelectOptionTextFieldState extends State<SelectOptionTextField> {
     super.initState();
     WidgetsBinding.instance.addPostFrameCallback((_) {
       widget.focusNode.requestFocus();
+      _scrollToEnd();
     });
     widget.textController.addListener(_onChanged);
   }
 
+  @override
+  void didUpdateWidget(covariant oldWidget) {
+    if (oldWidget.selectedOptionMap.length < widget.selectedOptionMap.length) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        _scrollToEnd();
+      });
+    }
+    super.didUpdateWidget(oldWidget);
+  }
+
   @override
   void dispose() {
     widget.textController.removeListener(_onChanged);
@@ -80,6 +93,16 @@ class _SelectOptionTextFieldState extends State<SelectOptionTextField> {
     );
   }
 
+  void _scrollToEnd() {
+    if (widget.scrollController?.hasClients ?? false) {
+      widget.scrollController?.animateTo(
+        widget.scrollController!.position.maxScrollExtent,
+        duration: const Duration(milliseconds: 150),
+        curve: Curves.easeOut,
+      );
+    }
+  }
+
   void _onChanged() {
     if (!widget.textController.value.composing.isCollapsed) {
       return;
@@ -132,6 +155,7 @@ class _SelectOptionTextFieldState extends State<SelectOptionTextField> {
             ),
             child: SingleChildScrollView(
               scrollDirection: Axis.horizontal,
+              controller: widget.scrollController,
               child: Wrap(spacing: 4, children: children),
             ),
           ),