refactor: accordion

lib/src/components/accordion/accordion.dart

@@ -3,73 +3,71 @@ import 'package:flutter_dsfr/flutter_dsfr.dart';
 import 'package:flutter_dsfr/src/components/accordion/accordion_border.dart';
 import 'package:flutter_dsfr/src/components/accordion/accordion_panel.dart';
 
+/// {@template accordion_data}
 /// Create an Accordion .
 /// Must be render inside a Scrollable widget
 ///
 /// Specs: https://gouvfr.atlassian.net/wiki/spaces/DB/pages/312082509/Accord+on+-+Accordion
+/// {@endtemplate}
 class DSFRAccordion extends StatefulWidget {
+  /// {@macro accordion_data}
   const DSFRAccordion({required this.panels, super.key});
 
   final List<DSFRAccordionData> panels;
 
   @override
-  State<StatefulWidget> createState() => _DSFRAccordionState();
+  State<DSFRAccordion> createState() => _DSFRAccordionState();
 }
 
 class _DSFRAccordionState extends State<DSFRAccordion> {
-  UniqueKey? _accordionValue;
-  late final _itemsValues =
+  UniqueKey? accordionValue;
+  late final itemsValues =
       List<UniqueKey>.generate(widget.panels.length, (_) => UniqueKey());
-  late final _panels = widget.panels;
+  late final panels = widget.panels;
+  bool initialized = false;
 
   @override
   void initState() {
     super.initState();
-    _setDefaultAccordionValue();
+    setDefaultAccordionValue();
   }
 
-  // ! this should only be called once in initState
-  void _setDefaultAccordionValue() {
+  void setDefaultAccordionValue() {
+    if (initialized) return;
     final lastInitialyExpandedIndex =
-        _panels.lastIndexWhere((panelData) => panelData.isInitialyExpanded);
+        panels.lastIndexWhere((panelData) => panelData.isInitialyExpanded);
 
     if (lastInitialyExpandedIndex != -1 &&
-        _itemsValues.length == _panels.length) {
-      _accordionValue = _itemsValues[lastInitialyExpandedIndex];
+        itemsValues.length == panels.length) {
+      accordionValue = itemsValues[lastInitialyExpandedIndex];
     }
+    initialized = true;
   }
 
-  List<Widget> _renderPanels() {
-    final children = <Widget>[];
+  Iterable<Widget> renderPanels() sync* {
+    for (var i = 0; i < panels.length; i++) {
+      final isLastInGroup = i == panels.length - 1;
+      final panelData = panels[i];
 
-    for (var i = 0; i < _panels.length; i++) {
-      final isLastInGroup = i == _panels.length - 1;
-      final panelData = _panels[i];
-
-      final child = DSFRAccordionBorder(
+      yield DSFRAccordionBorder(
         isLastInGroup: isLastInGroup,
         child: DSFRAccordionPanel(
           data: panelData,
-          accordionValue: _accordionValue,
-          itemValue: _itemsValues[i],
+          accordionValue: accordionValue,
+          itemValue: itemsValues[i],
           onExpandedChange: (newValue) {
-            setState(() {
-              _accordionValue = newValue;
-            });
+            setState(() => accordionValue = newValue);
           },
         ),
       );
-
-      children.add(child);
     }
-
-    return children;
   }
 
   @override
   Widget build(BuildContext context) {
     return Column(
-      children: _renderPanels(),
+      mainAxisSize: MainAxisSize.min,
+      children: [...renderPanels()],
     );
   }
 }

lib/src/components/accordion/accordion_panel.dart

@@ -12,52 +12,17 @@ class DSFRAccordionPanel extends StatelessWidget {
   });
 
   final DSFRAccordionData data;
-  final void Function(UniqueKey?) onExpandedChange;
+  final ValueChanged<UniqueKey?> onExpandedChange;
   final UniqueKey? accordionValue;
   final UniqueKey itemValue;
 
-  bool get _isExpanded => itemValue == accordionValue;
-
-  Widget _getTitle(
-    BuildContext context, {
-    required DSFRTypography dsfrTypography,
-    required DSFRColors dsfrColors,
-  }) {
-    if (_isExpanded) {
-      return Text(
-        data.title,
-        style: dsfrTypography.boldText.copyWith(
-          color: dsfrColors.text,
-        ),
-      );
-    }
-
-    return Text(
-      data.title,
-      style:
-          DefaultTextStyle.of(context).style.copyWith(color: dsfrColors.text),
-    );
-  }
-
-  Widget _getTrailingIcon({
-    required DSFRColors dsfrColors,
-    required DSFRSizes dsfrSizes,
-  }) {
-    final iconData = _isExpanded ? DSFRIcons.substract : DSFRIcons.add;
-
-    return Icon(
-      iconData,
-      color: dsfrColors.text,
-      size: dsfrSizes.w2,
-    );
-  }
-
   @override
   Widget build(BuildContext context) {
     final dsfrTheme = DSFRThemeData.of(context);
     final dsfrTypography = dsfrTheme.typography;
     final dsfrColors = dsfrTheme.colors;
     final dsfrSizes = dsfrTheme.sizes;
+    final isExpanded = itemValue == accordionValue;
 
     return Theme(
       data: Theme.of(context).copyWith(
@@ -75,14 +40,19 @@ class DSFRAccordionPanel extends StatelessWidget {
             onExpandedChange(null);
           }
         },
-        isExpanded: _isExpanded,
-        title: _getTitle(
-          context,
-          dsfrTypography: dsfrTypography,
-          dsfrColors: dsfrColors,
+        isExpanded: isExpanded,
+        title: DefaultTextStyle(
+          style: (isExpanded
+                  ? dsfrTypography.boldText
+                  : dsfrTypography.defaultText)
+              .copyWith(color: dsfrColors.text),
+          child: Text(data.title),
+        ),
+        trailing: Icon(
+          isExpanded ? DSFRIcons.substract : DSFRIcons.add,
+          color: dsfrColors.text,
+          size: dsfrSizes.w2,
         ),
-        trailing:
-            _getTrailingIcon(dsfrColors: dsfrColors, dsfrSizes: dsfrSizes),
         child: data.content,
       ),
     );

test/components/accordion/accordion_robot.dart

@@ -13,23 +13,16 @@ class AccordionRobot {
   }) async {
     await tester.pumpWidget(
       MaterialApp(
-        home: Material(
-          child: Theme(
-            data: ThemeData(
-              fontFamily: DSFRFonts.marianne,
-              brightness: Brightness.light,
-              extensions: const [
-                DSFRTypography.medium(),
-                DSFRColors.light(),
-                DSFRSizes.regular(),
-              ],
-            ),
-            child: SingleChildScrollView(
-              child: DSFRAccordion(
-                panels: panels,
-              ),
-            ),
-          ),
+        theme: ThemeData(
+          useMaterial3: false,
+          fontFamily: DSFRFonts.marianne,
+          brightness: Brightness.light,
+          extensions: const [
+            DSFRThemeData(colors: DSFRColors.light()),
+          ],
+        ),
+        home: SingleChildScrollView(
+          child: DSFRAccordion(panels: panels),
         ),
       ),
     );

test/components/accordion/accordion_widget_test.dart

@@ -38,18 +38,14 @@ void main() {
   testWidgets(
     'it have a radio like logic, only one content can be open at a time',
     (tester) async {
-      final panels = [
-        const DSFRAccordionData(
+      const panels = [
+        DSFRAccordionData(
           title: titleText,
-          content: Text(
-            contentText1,
-          ),
+          content: Text(contentText1),
         ),
-        const DSFRAccordionData(
+        DSFRAccordionData(
           title: titleText,
-          content: Text(
-            contentText2,
-          ),
+          content: Text(contentText2),
         ),
       ];