opt.: close after saving (#684)

lib/view/page/setting/entry.dart

@@ -305,6 +305,7 @@ final class _AppSettingsPageState extends State<AppSettingsPage> {
         _buildEditorTheme(),
         _buildEditorDarkTheme(),
         _buildEditorHighlight(),
+        _buildEditorCloseAfterEdit(),
       ].map((e) => CardX(child: e)).toList(),
     );
   }
@@ -1329,32 +1330,49 @@ final class _AppSettingsPageState extends State<AppSettingsPage> {
     final map = await Stores.setting.getAllMap(includeInternalKeys: true);
     final keys = map.keys;
 
+    void onSave(BuildContext context, EditorPageRet ret) {
+      if (ret.typ != EditorPageRetType.text) {
+        context.showRoundDialog(
+          title: libL10n.fail,
+          child: Text(l10n.invalid),
+        );
+        return;
+      }
+      try {
+        final newSettings = json.decode(ret.val) as Map<String, dynamic>;
+        Stores.setting.box.putAll(newSettings);
+        final newKeys = newSettings.keys;
+        final removedKeys = keys.where((e) => !newKeys.contains(e));
+        for (final key in removedKeys) {
+          Stores.setting.box.delete(key);
+        }
+      } catch (e, trace) {
+        context.showRoundDialog(
+          title: libL10n.error,
+          child: Text('${l10n.save}:\n$e'),
+        );
+        Loggers.app.warning('Update json settings failed', e, trace);
+      }
+    }
+
     /// Encode [map] to String with indent `\t`
     final text = jsonIndentEncoder.convert(map);
-    final ret = await EditorPage.route.go(
+    await EditorPage.route.go(
       context,
       args: EditorPageArgs(
         text: text,
         langCode: 'json',
         title: libL10n.setting,
+        onSave: onSave,
       ),
     );
-    final result = ret?.result;
-    if (result == null) return;
-    try {
-      final newSettings = json.decode(result) as Map<String, dynamic>;
-      Stores.setting.box.putAll(newSettings);
-      final newKeys = newSettings.keys;
-      final removedKeys = keys.where((e) => !newKeys.contains(e));
-      for (final key in removedKeys) {
-        Stores.setting.box.delete(key);
-      }
-    } catch (e, trace) {
-      context.showRoundDialog(
-        title: libL10n.error,
-        child: Text('${l10n.save}:\n$e'),
-      );
-      Loggers.app.warning('Update json settings failed', e, trace);
-    }
+  }
+
+  Widget _buildEditorCloseAfterEdit() {
+    return ListTile(
+      leading: const Icon(MingCute.edit_fill),
+      title: Text(l10n.closeAfterSave),
+      trailing: StoreSwitch(prop: _setting.closeAfterSave),
+    );
   }
 }