diff --git a/lib/view/page/apt.dart b/lib/view/page/apt.dart
index d504bd92..e17bd317 100644
--- a/lib/view/page/apt.dart
+++ b/lib/view/page/apt.dart
@@ -6,6 +6,7 @@ import 'package:toolbox/data/model/apt/upgrade_pkg_info.dart';
 import 'package:toolbox/data/model/server/server_private_info.dart';
 import 'package:toolbox/data/provider/apt.dart';
 import 'package:toolbox/data/provider/server.dart';
+import 'package:toolbox/data/res/font_style.dart';
 import 'package:toolbox/data/res/url.dart';
 import 'package:toolbox/generated/l10n.dart';
 import 'package:toolbox/locator.dart';
@@ -26,18 +27,17 @@ class AptManagePage extends StatefulWidget {
 class _AptManagePageState extends State<AptManagePage>
     with SingleTickerProviderStateMixin {
   late MediaQueryData _media;
-  final greyStyle = const TextStyle(color: Colors.grey);
-  final scrollController = ScrollController();
-  final scrollControllerUpdate = ScrollController();
-  final textController = TextEditingController();
+  final _scrollController = ScrollController();
+  final _scrollControllerUpdate = ScrollController();
+  final _textController = TextEditingController();
   final _aptProvider = locator<AptProvider>();
-  late S s;
+  late S _s;
 
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
     _media = MediaQuery.of(context);
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
@@ -53,7 +53,7 @@ class _AptManagePageState extends State<AptManagePage>
         .servers
         .firstWhere((e) => e.info == widget.spi);
     if (si.client == null) {
-      showSnackBar(context, Text(s.waitConnection));
+      showSnackBar(context, Text(_s.waitConnection));
       Navigator.of(context).pop();
       return;
     }
@@ -61,9 +61,10 @@ class _AptManagePageState extends State<AptManagePage>
     _aptProvider.init(
       si.client!,
       si.status.sysVer.dist,
-      () => scrollController.jumpTo(scrollController.position.maxScrollExtent),
-      () => scrollControllerUpdate
-          .jumpTo(scrollController.position.maxScrollExtent),
+      () =>
+          _scrollController.jumpTo(_scrollController.position.maxScrollExtent),
+      () => _scrollControllerUpdate
+          .jumpTo(_scrollController.position.maxScrollExtent),
       onPwdRequest,
       widget.spi.user,
     );
@@ -71,14 +72,14 @@ class _AptManagePageState extends State<AptManagePage>
   }
 
   void onSubmitted() {
-    if (textController.text == '') {
+    if (_textController.text == '') {
       showRoundDialog(
         context,
-        s.attention,
-        Text(s.fieldMustNotEmpty),
+        _s.attention,
+        Text(_s.fieldMustNotEmpty),
         [
           TextButton(
-              onPressed: () => Navigator.of(context).pop(), child: Text(s.ok)),
+              onPressed: () => Navigator.of(context).pop(), child: Text(_s.ok)),
         ],
       );
       return;
@@ -92,12 +93,12 @@ class _AptManagePageState extends State<AptManagePage>
       context,
       widget.spi.user,
       TextField(
-        controller: textController,
+        controller: _textController,
         keyboardType: TextInputType.visiblePassword,
         obscureText: true,
         onSubmitted: (_) => onSubmitted(),
         decoration: InputDecoration(
-          labelText: s.pwd,
+          labelText: _s.pwd,
         ),
       ),
       [
@@ -106,16 +107,16 @@ class _AptManagePageState extends State<AptManagePage>
               Navigator.of(context).pop();
               Navigator.of(context).pop();
             },
-            child: Text(s.cancel)),
+            child: Text(_s.cancel)),
         TextButton(
             onPressed: () => onSubmitted(),
             child: Text(
-              s.ok,
+              _s.ok,
               style: const TextStyle(color: Colors.red),
             )),
       ],
     );
-    return textController.text.trim();
+    return _textController.text.trim();
   }
 
   @override
@@ -167,7 +168,7 @@ class _AptManagePageState extends State<AptManagePage>
               constraints: const BoxConstraints.expand(),
               child: SingleChildScrollView(
                 padding: const EdgeInsets.all(18),
-                controller: scrollControllerUpdate,
+                controller: _scrollControllerUpdate,
                 child: Text(apt.updateLog!),
               ),
             ),
@@ -180,7 +181,7 @@ class _AptManagePageState extends State<AptManagePage>
               padding: const EdgeInsets.all(17),
               child: UrlText(
                 text:
-                    '${s.experimentalFeature}\n${s.reportBugsOnGithubIssue(issueUrl)}',
+                    '${_s.experimentalFeature}\n${_s.reportBugsOnGithubIssue(issueUrl)}',
                 replace: 'Github Issue',
                 textAlign: TextAlign.center,
               ),
@@ -196,7 +197,7 @@ class _AptManagePageState extends State<AptManagePage>
     if (apt.upgradeable!.isEmpty) {
       return ListTile(
         title: Text(
-          s.noUpdateAvailable,
+          _s.noUpdateAvailable,
           textAlign: TextAlign.center,
         ),
         subtitle: const Text('>_<', textAlign: TextAlign.center),
@@ -206,24 +207,24 @@ class _AptManagePageState extends State<AptManagePage>
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         ExpansionTile(
-          title: Text(s.foundNUpdate(apt.upgradeable!.length)),
+          title: Text(_s.foundNUpdate(apt.upgradeable!.length)),
           subtitle: Text(
             apt.upgradeable!.map((e) => e.package).join(', '),
             maxLines: 1,
             overflow: TextOverflow.ellipsis,
-            style: greyStyle,
+            style: grey,
           ),
           children: apt.upgradeLog == null
               ? [
                   TextButton(
-                      child: Text(s.updateAll),
+                      child: Text(_s.updateAll),
                       onPressed: () {
                         apt.upgrade();
                       }),
                   SizedBox(
                     height: _media.size.height * 0.73,
                     child: ListView(
-                      controller: scrollController,
+                      controller: _scrollController,
                       children: apt.upgradeable!
                           .map((e) => _buildUpdateItem(e, apt))
                           .toList(),
@@ -237,7 +238,7 @@ class _AptManagePageState extends State<AptManagePage>
                       constraints: const BoxConstraints.expand(),
                       child: SingleChildScrollView(
                         padding: const EdgeInsets.all(18),
-                        controller: scrollController,
+                        controller: _scrollController,
                         child: Text(apt.upgradeLog!),
                       ),
                     ),
@@ -253,7 +254,7 @@ class _AptManagePageState extends State<AptManagePage>
       title: Text(info.package),
       subtitle: Text(
         '${info.nowVersion} -> ${info.newVersion}',
-        style: greyStyle,
+        style: grey,
       ),
     );
   }
diff --git a/lib/view/page/backup.dart b/lib/view/page/backup.dart
index 2be5bec4..256c00f3 100644
--- a/lib/view/page/backup.dart
+++ b/lib/view/page/backup.dart
@@ -21,10 +21,10 @@ const backupFormatVersion = 1;
 class BackupPage extends StatelessWidget {
   BackupPage({Key? key}) : super(key: key);
 
-  final setting = locator<SettingStore>();
-  final server = locator<ServerStore>();
-  final snippet = locator<SnippetStore>();
-  final privateKey = locator<PrivateKeyStore>();
+  final _setting = locator<SettingStore>();
+  final _server = locator<ServerStore>();
+  final _snippet = locator<SnippetStore>();
+  final _privateKey = locator<PrivateKeyStore>();
 
   @override
   Widget build(BuildContext context) {
@@ -100,12 +100,12 @@ class BackupPage extends StatelessWidget {
           Backup(
             backupFormatVersion,
             DateTime.now().toString().split('.').first,
-            server.fetch(),
-            snippet.fetch(),
-            privateKey.fetch(),
-            setting.primaryColor.fetch() ?? Colors.pinkAccent.value,
-            setting.serverStatusUpdateInterval.fetch() ?? 2,
-            setting.launchPage.fetch() ?? 0,
+            _server.fetch(),
+            _snippet.fetch(),
+            _privateKey.fetch(),
+            _setting.primaryColor.fetch() ?? Colors.pinkAccent.value,
+            _setting.serverStatusUpdateInterval.fetch() ?? 2,
+            _setting.launchPage.fetch() ?? 0,
           ),
         ),
       );
@@ -186,18 +186,18 @@ class BackupPage extends StatelessWidget {
           TextButton(
             onPressed: () async {
               for (final s in backup.snippets) {
-                snippet.put(s);
+                _snippet.put(s);
               }
               for (final s in backup.spis) {
-                server.put(s);
+                _server.put(s);
               }
               for (final s in backup.keys) {
-                privateKey.put(s);
+                _privateKey.put(s);
               }
-              setting.primaryColor.put(backup.primaryColor);
-              setting.serverStatusUpdateInterval
+              _setting.primaryColor.put(backup.primaryColor);
+              _setting.serverStatusUpdateInterval
                   .put(backup.serverStatusUpdateInterval);
-              setting.launchPage.put(backup.launchPage);
+              _setting.launchPage.put(backup.launchPage);
               Navigator.of(context).pop();
               showSnackBar(context, Text(s.restoreSuccess));
             },
diff --git a/lib/view/page/convert.dart b/lib/view/page/convert.dart
index a37cfda7..e46c66c3 100644
--- a/lib/view/page/convert.dart
+++ b/lib/view/page/convert.dart
@@ -21,7 +21,7 @@ class _ConvertPageState extends State<ConvertPage>
   late TextEditingController _textEditingControllerResult;
   late MediaQueryData _media;
   late ThemeData _theme;
-  late S s;
+  late S _s;
 
   int _typeOptionIndex = 0;
 
@@ -37,7 +37,7 @@ class _ConvertPageState extends State<ConvertPage>
     super.didChangeDependencies();
     _media = MediaQuery.of(context);
     _theme = Theme.of(context);
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
@@ -65,7 +65,7 @@ class _ConvertPageState extends State<ConvertPage>
             showSnackBar(context, Text('Error: \n$e'));
           }
         },
-        tooltip: s.convert,
+        tooltip: _s.convert,
         heroTag: 'convert fab',
         child: const Icon(Icons.send),
       ),
@@ -84,7 +84,7 @@ class _ConvertPageState extends State<ConvertPage>
       case 3:
         return Uri.decodeFull(text);
       default:
-        return s.unkownConvertMode;
+        return _s.unkownConvertMode;
     }
   }
 
@@ -96,8 +96,8 @@ class _ConvertPageState extends State<ConvertPage>
   }
 
   Widget _buildTypeOption() {
-    final decode = s.decode;
-    final encode = s.encode;
+    final decode = _s.decode;
+    final encode = _s.encode;
     final List<String> typeOption = [
       'Base64 $decode',
       'Base64 $encode',
@@ -113,7 +113,7 @@ class _ConvertPageState extends State<ConvertPage>
             TextButton(
               style: ButtonStyle(
                   foregroundColor: MaterialStateProperty.all(primaryColor)),
-              child: Icon(Icons.change_circle, semanticLabel: s.upsideDown),
+              child: Icon(Icons.change_circle, semanticLabel: _s.upsideDown),
               onPressed: () {
                 final temp = _textEditingController.text;
                 _textEditingController.text = _textEditingControllerResult.text;
@@ -124,7 +124,7 @@ class _ConvertPageState extends State<ConvertPage>
               style: ButtonStyle(
                 foregroundColor: MaterialStateProperty.all(primaryColor),
               ),
-              child: Icon(Icons.copy, semanticLabel: s.copy),
+              child: Icon(Icons.copy, semanticLabel: _s.copy),
               onPressed: () => Clipboard.setData(
                 ClipboardData(
                     text: _textEditingControllerResult.text == ''
@@ -150,7 +150,7 @@ class _ConvertPageState extends State<ConvertPage>
                     color: primaryColor),
               ),
               Text(
-                s.currentMode,
+                _s.currentMode,
                 textScaleFactor: 1.0,
                 textAlign: TextAlign.right,
                 style: const TextStyle(fontSize: 9.0, color: Colors.grey),
diff --git a/lib/view/page/docker.dart b/lib/view/page/docker.dart
index 50d307fc..d20c35a2 100644
--- a/lib/view/page/docker.dart
+++ b/lib/view/page/docker.dart
@@ -7,6 +7,7 @@ import 'package:toolbox/data/model/server/server_private_info.dart';
 import 'package:toolbox/data/provider/docker.dart';
 import 'package:toolbox/data/provider/server.dart';
 import 'package:toolbox/data/res/error.dart';
+import 'package:toolbox/data/res/font_style.dart';
 import 'package:toolbox/data/res/url.dart';
 import 'package:toolbox/data/store/docker.dart';
 import 'package:toolbox/generated/l10n.dart';
@@ -26,9 +27,8 @@ class DockerManagePage extends StatefulWidget {
 
 class _DockerManagePageState extends State<DockerManagePage> {
   final _docker = locator<DockerProvider>();
-  final greyTextStyle = const TextStyle(color: Colors.grey);
-  final textController = TextEditingController();
-  late S s;
+  final _textController = TextEditingController();
+  late S _s;
 
   @override
   void dispose() {
@@ -39,7 +39,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
@@ -50,7 +50,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
         .firstWhere((element) => element.info == widget.spi)
         .client;
     if (client == null) {
-      showSnackBar(context, Text(s.noClient));
+      showSnackBar(context, Text(_s.noClient));
       Navigator.of(context).pop();
       return;
     }
@@ -90,14 +90,14 @@ class _DockerManagePageState extends State<DockerManagePage> {
     final argsCtrl = TextEditingController();
     await showRoundDialog(
       context,
-      s.newContainer,
+      _s.newContainer,
       Column(
         mainAxisSize: MainAxisSize.min,
         children: [
           TextField(
             keyboardType: TextInputType.text,
             decoration: InputDecoration(
-                labelText: s.dockerImage, hintText: 'ubuntu:22.10'),
+                labelText: _s.dockerImage, hintText: 'ubuntu:22.10'),
             controller: imageCtrl,
             autocorrect: false,
           ),
@@ -105,14 +105,15 @@ class _DockerManagePageState extends State<DockerManagePage> {
             keyboardType: TextInputType.text,
             controller: nameCtrl,
             decoration: InputDecoration(
-                labelText: s.dockerContainerName, hintText: 'ubuntu22'),
+                labelText: _s.dockerContainerName, hintText: 'ubuntu22'),
             autocorrect: false,
           ),
           TextField(
             keyboardType: TextInputType.text,
             controller: argsCtrl,
             decoration: InputDecoration(
-                labelText: s.extraArgs, hintText: '-p 2222:22 -v ~/.xxx/:/xxx'),
+                labelText: _s.extraArgs,
+                hintText: '-p 2222:22 -v ~/.xxx/:/xxx'),
             autocorrect: false,
           ),
         ],
@@ -120,7 +121,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
       [
         TextButton(
           onPressed: () => Navigator.of(context).pop(),
-          child: Text(s.cancel),
+          child: Text(_s.cancel),
         ),
         TextButton(
           onPressed: () async {
@@ -133,7 +134,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
               ),
             );
           },
-          child: Text(s.ok),
+          child: Text(_s.ok),
         )
       ],
     );
@@ -142,22 +143,22 @@ class _DockerManagePageState extends State<DockerManagePage> {
   Future<void> _showAddCmdPreview(String cmd) async {
     await showRoundDialog(
       context,
-      s.preview,
+      _s.preview,
       Text(cmd),
       [
         TextButton(
           onPressed: () => Navigator.of(context).pop(),
-          child: Text(s.cancel),
+          child: Text(_s.cancel),
         ),
         TextButton(
           onPressed: () async {
             Navigator.of(context).pop();
             final result = await _docker.run(cmd);
             if (result != null) {
-              showSnackBar(context, Text(getErrMsg(result) ?? s.unknownError));
+              showSnackBar(context, Text(getErrMsg(result) ?? _s.unknownError));
             }
           },
-          child: Text(s.run),
+          child: Text(_s.run),
         )
       ],
     );
@@ -184,10 +185,10 @@ class _DockerManagePageState extends State<DockerManagePage> {
   }
 
   void onSubmitted() {
-    if (textController.text == '') {
-      showRoundDialog(context, s.attention, Text(s.fieldMustNotEmpty), [
+    if (_textController.text == '') {
+      showRoundDialog(context, _s.attention, Text(_s.fieldMustNotEmpty), [
         TextButton(
-            onPressed: () => Navigator.of(context).pop(), child: Text(s.ok)),
+            onPressed: () => Navigator.of(context).pop(), child: Text(_s.ok)),
       ]);
       return;
     }
@@ -200,12 +201,12 @@ class _DockerManagePageState extends State<DockerManagePage> {
       context,
       widget.spi.user,
       TextField(
-        controller: textController,
+        controller: _textController,
         keyboardType: TextInputType.visiblePassword,
         obscureText: true,
         onSubmitted: (_) => onSubmitted(),
         decoration: InputDecoration(
-          labelText: s.pwd,
+          labelText: _s.pwd,
         ),
       ),
       [
@@ -214,18 +215,18 @@ class _DockerManagePageState extends State<DockerManagePage> {
             Navigator.of(context).pop();
             Navigator.of(context).pop();
           },
-          child: Text(s.cancel),
+          child: Text(_s.cancel),
         ),
         TextButton(
           onPressed: () => onSubmitted(),
           child: Text(
-            s.ok,
+            _s.ok,
             style: const TextStyle(color: Colors.red),
           ),
         ),
       ],
     );
-    return textController.text.trim();
+    return _textController.text.trim();
   }
 
   Widget _buildMain(DockerProvider docker) {
@@ -260,7 +261,8 @@ class _DockerManagePageState extends State<DockerManagePage> {
       padding: const EdgeInsets.all(7),
       children: [
         _buildLoading(docker),
-        _buildVersion(docker.edition ?? s.unknown, docker.version ?? s.unknown),
+        _buildVersion(
+            docker.edition ?? _s.unknown, docker.version ?? _s.unknown),
         _buildPsItems(running, docker),
         _buildImages(docker),
         _buildEditHost(running, docker),
@@ -273,10 +275,10 @@ class _DockerManagePageState extends State<DockerManagePage> {
       return const SizedBox();
     }
     return ExpansionTile(
-        title: Text(s.imagesList),
+        title: Text(_s.imagesList),
         subtitle: Text(
-          s.dockerImagesFmt(docker.images!.length),
-          style: greyTextStyle,
+          _s.dockerImagesFmt(docker.images!.length),
+          style: grey,
         ),
         children: docker.images!
             .map(
@@ -289,7 +291,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
                     final result = await _docker.run('docker rmi ${e.id} -f');
                     if (result != null) {
                       showSnackBar(
-                          context, Text(getErrMsg(result) ?? s.unknownError));
+                          context, Text(getErrMsg(result) ?? _s.unknownError));
                     }
                   },
                 ),
@@ -322,12 +324,12 @@ class _DockerManagePageState extends State<DockerManagePage> {
       child: Column(
         children: [
           Text(
-            s.dockerEmptyRunningItems,
+            _s.dockerEmptyRunningItems,
             textAlign: TextAlign.center,
           ),
           TextButton(
             onPressed: () => _showEditHostDialog(docker),
-            child: Text(s.dockerEditHost),
+            child: Text(_s.dockerEditHost),
           )
         ],
       ),
@@ -337,7 +339,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
   Future<void> _showEditHostDialog(DockerProvider docker) async {
     await showRoundDialog(
       context,
-      s.dockerEditHost,
+      _s.dockerEditHost,
       TextField(
         maxLines: 1,
         autocorrect: false,
@@ -352,7 +354,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
       [
         TextButton(
           onPressed: () => Navigator.of(context).pop(),
-          child: Text(s.cancel),
+          child: Text(_s.cancel),
         ),
       ],
     );
@@ -362,16 +364,16 @@ class _DockerManagePageState extends State<DockerManagePage> {
     var errStr = '';
     switch (err.type) {
       case DockerErrType.noClient:
-        errStr = s.noClient;
+        errStr = _s.noClient;
         break;
       case DockerErrType.notInstalled:
-        errStr = s.dockerNotInstalled;
+        errStr = _s.dockerNotInstalled;
         break;
       case DockerErrType.invalidVersion:
-        errStr = s.invalidVersion;
+        errStr = _s.invalidVersion;
         break;
       default:
-        errStr = err.message ?? s.unknown;
+        errStr = err.message ?? _s.unknown;
     }
     return Text(errStr);
   }
@@ -380,18 +382,18 @@ class _DockerManagePageState extends State<DockerManagePage> {
     switch (err.type) {
       case DockerErrType.notInstalled:
         return UrlText(
-          text: s.installDockerWithUrl,
-          replace: s.install,
+          text: _s.installDockerWithUrl,
+          replace: _s.install,
         );
       case DockerErrType.noClient:
-        return Text(s.waitConnection);
+        return Text(_s.waitConnection);
       case DockerErrType.invalidVersion:
         return UrlText(
-          text: s.invalidVersionHelp(issueUrl),
+          text: _s.invalidVersionHelp(issueUrl),
           replace: 'Github',
         );
       default:
-        return Text(s.unknownError);
+        return Text(_s.unknownError);
     }
   }
 
@@ -407,8 +409,8 @@ class _DockerManagePageState extends State<DockerManagePage> {
 
   Widget _buildPsItems(List<DockerPsItem> running, DockerProvider docker) {
     return ExpansionTile(
-      title: Text(s.containerStatus),
-      subtitle: Text(_buildSubtitle(running), style: greyTextStyle),
+      title: Text(_s.containerStatus),
+      subtitle: Text(_buildSubtitle(running), style: grey),
       children: running.map(
         (item) {
           return ListTile(
@@ -437,7 +439,7 @@ class _DockerManagePageState extends State<DockerManagePage> {
       ],
       onSelected: (value) {
         if (busy) {
-          showSnackBar(context, Text(s.isBusy));
+          showSnackBar(context, Text(_s.isBusy));
           return;
         }
         final item = value as DropdownBtnItem;
@@ -460,8 +462,8 @@ class _DockerManagePageState extends State<DockerManagePage> {
     final runningCount = running.where((element) => element.running).length;
     final stoped = running.length - runningCount;
     if (stoped == 0) {
-      return s.dockerStatusRunningFmt(runningCount);
+      return _s.dockerStatusRunningFmt(runningCount);
     }
-    return s.dockerStatusRunningAndStoppedFmt(runningCount, stoped);
+    return _s.dockerStatusRunningAndStoppedFmt(runningCount, stoped);
   }
 }
diff --git a/lib/view/page/home.dart b/lib/view/page/home.dart
index af68f026..c9b029d1 100644
--- a/lib/view/page/home.dart
+++ b/lib/view/page/home.dart
@@ -45,7 +45,7 @@ class _MyHomePageState extends State<MyHomePage>
   late final PageController _pageController;
   late int _selectIndex;
   late double _width;
-  late S s;
+  late S _s;
 
   @override
   void initState() {
@@ -59,7 +59,7 @@ class _MyHomePageState extends State<MyHomePage>
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
+    _s = S.of(context);
     _width = MediaQuery.of(context).size.width;
   }
 
@@ -84,20 +84,6 @@ class _MyHomePageState extends State<MyHomePage>
   @override
   Widget build(BuildContext context) {
     super.build(context);
-    return WillPopScope(
-      child: _buildMain(context),
-      onWillPop: () {
-        final scaffold = Scaffold.of(context);
-        if (scaffold.isDrawerOpen) {
-          scaffold.closeDrawer();
-          return Future.value(false);
-        }
-        return Future.value(true);
-      },
-    );
-  }
-
-  Widget _buildMain(BuildContext context) {
     return Scaffold(
       drawer: _buildDrawer(),
       appBar: AppBar(
@@ -105,7 +91,7 @@ class _MyHomePageState extends State<MyHomePage>
         actions: [
           IconButton(
             icon: const Icon(Icons.developer_mode, size: 23),
-            tooltip: s.debug,
+            tooltip: _s.debug,
             onPressed: () =>
                 AppRoute(const DebugPage(), 'Debug Page').go(context),
           ),
@@ -126,7 +112,6 @@ class _MyHomePageState extends State<MyHomePage>
   }
 
   Widget _buildItem(int idx, NavigationItem item, bool isSelected) {
-    bool isDarkMode = Theme.of(context).brightness == Brightness.dark;
     final width = _width / tabItems.length;
     return AnimatedContainer(
       duration: const Duration(milliseconds: 377),
@@ -135,7 +120,7 @@ class _MyHomePageState extends State<MyHomePage>
       width: isSelected ? width : width - 17,
       decoration: BoxDecoration(
         color: isSelected
-            ? isDarkMode
+            ? isDarkMode(context)
                 ? Colors.white12
                 : Colors.black.withOpacity(0.07)
             : Colors.transparent,
@@ -195,57 +180,57 @@ class _MyHomePageState extends State<MyHomePage>
               children: [
                 ListTile(
                   leading: const Icon(Icons.settings),
-                  title: Text(s.setting),
+                  title: Text(_s.setting),
                   onTap: () =>
                       AppRoute(const SettingPage(), 'Setting').go(context),
                 ),
                 ListTile(
                   leading: const Icon(Icons.vpn_key),
-                  title: Text(s.privateKey),
+                  title: Text(_s.privateKey),
                   onTap: () => AppRoute(
                           const StoredPrivateKeysPage(), 'private key list')
                       .go(context),
                 ),
                 ListTile(
                   leading: const Icon(Icons.download),
-                  title: Text(s.download),
+                  title: Text(_s.download),
                   onTap: () =>
                       AppRoute(const SFTPDownloadedPage(), 'snippet list')
                           .go(context),
                 ),
                 ListTile(
                   leading: const Icon(Icons.import_export),
-                  title: Text(s.backup),
+                  title: Text(_s.backup),
                   onTap: () =>
                       AppRoute(BackupPage(), 'backup page').go(context),
                 ),
                 ListTile(
                   leading: const Icon(Icons.info),
-                  title: Text(s.feedback),
+                  title: Text(_s.feedback),
                   onTap: () => showRoundDialog(
                     context,
-                    s.feedback,
-                    Text(s.feedbackOnGithub),
+                    _s.feedback,
+                    Text(_s.feedbackOnGithub),
                     [
                       TextButton(
                         onPressed: () => Clipboard.setData(
                             const ClipboardData(text: issueUrl)),
-                        child: Text(s.copy),
+                        child: Text(_s.copy),
                       ),
                       TextButton(
                         onPressed: () => openUrl(issueUrl),
-                        child: Text(s.feedback),
+                        child: Text(_s.feedback),
                       ),
                       TextButton(
                         onPressed: () => Navigator.of(context).pop(),
-                        child: Text(s.close),
+                        child: Text(_s.close),
                       )
                     ],
                   ),
                 ),
                 ListTile(
                   leading: const Icon(Icons.snippet_folder),
-                  title: Text(s.snippet),
+                  title: Text(_s.snippet),
                   onTap: () => AppRoute(const SnippetListPage(), 'snippet list')
                       .go(context),
                 ),
@@ -256,9 +241,10 @@ class _MyHomePageState extends State<MyHomePage>
                   applicationIcon: _buildIcon(),
                   aboutBoxChildren: [
                     UrlText(
-                        text: s.madeWithLove(myGithub), replace: 'lollipopkit'),
+                        text: _s.madeWithLove(myGithub),
+                        replace: 'lollipopkit'),
                     UrlText(
-                      text: s.aboutThanks,
+                      text: _s.aboutThanks,
                     ),
                     const UrlText(
                       text: rainSunMeGithub,
@@ -269,7 +255,7 @@ class _MyHomePageState extends State<MyHomePage>
                       replace: 'fecture',
                     )
                   ],
-                  child: Text(s.license),
+                  child: Text(_s.license),
                 )
               ],
             ),
diff --git a/lib/view/page/ping.dart b/lib/view/page/ping.dart
index d71bf4f9..c1dfb269 100644
--- a/lib/view/page/ping.dart
+++ b/lib/view/page/ping.dart
@@ -4,6 +4,7 @@ import 'package:toolbox/core/utils.dart';
 import 'package:toolbox/data/model/server/ping_result.dart';
 import 'package:toolbox/data/provider/server.dart';
 import 'package:toolbox/data/res/color.dart';
+import 'package:toolbox/data/res/font_style.dart';
 import 'package:toolbox/generated/l10n.dart';
 import 'package:toolbox/locator.dart';
 import 'package:toolbox/view/widget/input_field.dart';
@@ -29,9 +30,6 @@ class _PingPageState extends State<PingPage>
   final List<PingResult> _results = [];
   final _serverProvider = locator<ServerProvider>();
   late S s;
-  static const summaryTextStyle = TextStyle(
-    fontSize: 12,
-  );
 
   @override
   void initState() {
@@ -103,7 +101,7 @@ class _PingPageState extends State<PingPage>
         ),
         subtitle: Text(
           _buildPingSummary(result, unknown, ms),
-          style: summaryTextStyle,
+          style: textSize11,
         ),
         trailing: Text(
           '${s.pingAvg}${result.statistic?.avg?.toStringAsFixed(2) ?? s.unknown} $ms',
diff --git a/lib/view/page/private_key/edit.dart b/lib/view/page/private_key/edit.dart
index 96e0c0b4..597a3799 100644
--- a/lib/view/page/private_key/edit.dart
+++ b/lib/view/page/private_key/edit.dart
@@ -21,42 +21,42 @@ class PrivateKeyEditPage extends StatefulWidget {
 
 class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
     with AfterLayoutMixin {
-  final nameController = TextEditingController();
-  final keyController = TextEditingController();
-  final pwdController = TextEditingController();
-  final nameNode = FocusNode();
-  final keyNode = FocusNode();
-  final pwdNode = FocusNode();
-
-  late FocusScopeNode focusScope;
+  final _nameController = TextEditingController();
+  final _keyController = TextEditingController();
+  final _pwdController = TextEditingController();
+  final _nameNode = FocusNode();
+  final _keyNode = FocusNode();
+  final _pwdNode = FocusNode();
 
+  late FocusScopeNode _focusScope;
   late PrivateKeyProvider _provider;
-  late Widget loading;
-  late S s;
+  late S _s;
+
+  Widget _loading = const SizedBox();
 
   @override
   void initState() {
     super.initState();
     _provider = locator<PrivateKeyProvider>();
-    loading = const SizedBox();
+    _loading = const SizedBox();
   }
 
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
-    focusScope = FocusScope.of(context);
+    _s = S.of(context);
+    _focusScope = FocusScope.of(context);
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(s.edit, style: textSize18),
+        title: Text(_s.edit, style: textSize18),
         actions: [
           widget.info != null
               ? IconButton(
-                  tooltip: s.delete,
+                  tooltip: _s.delete,
                   onPressed: () {
                     _provider.delInfo(widget.info!);
                     Navigator.of(context).pop();
@@ -69,48 +69,48 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
         padding: const EdgeInsets.all(13),
         children: [
           TextField(
-            controller: nameController,
+            controller: _nameController,
             keyboardType: TextInputType.text,
-            focusNode: nameNode,
-            onSubmitted: (_) => focusScope.requestFocus(keyNode),
-            decoration: buildDecoration(s.name, icon: Icons.info),
+            focusNode: _nameNode,
+            onSubmitted: (_) => _focusScope.requestFocus(_keyNode),
+            decoration: buildDecoration(_s.name, icon: Icons.info),
           ),
           TextField(
-            controller: keyController,
+            controller: _keyController,
             autocorrect: false,
             minLines: 3,
             maxLines: 10,
             keyboardType: TextInputType.text,
-            focusNode: keyNode,
-            onSubmitted: (_) => focusScope.requestFocus(pwdNode),
+            focusNode: _keyNode,
+            onSubmitted: (_) => _focusScope.requestFocus(_pwdNode),
             enableSuggestions: false,
-            decoration: buildDecoration(s.privateKey, icon: Icons.vpn_key),
+            decoration: buildDecoration(_s.privateKey, icon: Icons.vpn_key),
           ),
           TextField(
-            controller: pwdController,
+            controller: _pwdController,
             autocorrect: false,
             keyboardType: TextInputType.text,
-            focusNode: pwdNode,
+            focusNode: _pwdNode,
             obscureText: true,
-            decoration: buildDecoration(s.pwd, icon: Icons.password),
+            decoration: buildDecoration(_s.pwd, icon: Icons.password),
           ),
           SizedBox(height: MediaQuery.of(context).size.height * 0.1),
-          loading
+          _loading
         ],
       ),
       floatingActionButton: FloatingActionButton(
-        tooltip: s.save,
+        tooltip: _s.save,
         onPressed: () async {
-          final name = nameController.text;
-          final key = keyController.text.trim();
-          final pwd = pwdController.text;
+          final name = _nameController.text;
+          final key = _keyController.text.trim();
+          final pwd = _pwdController.text;
           if (name.isEmpty || key.isEmpty) {
-            showSnackBar(context, Text(s.fieldMustNotEmpty));
+            showSnackBar(context, Text(_s.fieldMustNotEmpty));
             return;
           }
           FocusScope.of(context).unfocus();
           setState(() {
-            loading = const SizedBox(
+            _loading = const SizedBox(
               height: 50,
               child: Center(
                 child: CircularProgressIndicator(),
@@ -126,7 +126,7 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
             haveErr = true;
           } finally {
             setState(() {
-              loading = const SizedBox();
+              _loading = const SizedBox();
             });
           }
           if (haveErr) return;
@@ -145,9 +145,9 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage>
   @override
   void afterFirstLayout(BuildContext context) {
     if (widget.info != null) {
-      nameController.text = widget.info!.id;
-      keyController.text = widget.info!.privateKey;
-      pwdController.text = widget.info!.password;
+      _nameController.text = widget.info!.id;
+      _keyController.text = widget.info!.privateKey;
+      _pwdController.text = widget.info!.password;
     }
   }
 }
diff --git a/lib/view/page/private_key/list.dart b/lib/view/page/private_key/list.dart
index 90df02d8..9e49a65a 100644
--- a/lib/view/page/private_key/list.dart
+++ b/lib/view/page/private_key/list.dart
@@ -17,20 +17,19 @@ class StoredPrivateKeysPage extends StatefulWidget {
 }
 
 class _PrivateKeyListState extends State<StoredPrivateKeysPage> {
-  final _textStyle = TextStyle(color: primaryColor);
-  late S s;
+  late S _s;
 
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(s.privateKey, style: textSize18),
+        title: Text(_s.privateKey, style: textSize18),
       ),
       body: Consumer<PrivateKeyProvider>(
         builder: (_, key, __) {
@@ -55,17 +54,14 @@ class _PrivateKeyListState extends State<StoredPrivateKeysPage> {
                                     PrivateKeyEditPage(info: key.infos[idx]),
                                     'private key edit page')
                                 .go(context),
-                            child: Text(
-                              s.edit,
-                              style: _textStyle,
-                            ),
+                            child: Text(_s.edit),
                           )
                         ],
                       ),
                     ));
                   })
               : Center(
-                  child: Text(s.noSavedPrivateKey),
+                  child: Text(_s.noSavedPrivateKey),
                 );
         },
       ),
diff --git a/lib/view/page/server/detail.dart b/lib/view/page/server/detail.dart
index 9cbf2388..7b418256 100644
--- a/lib/view/page/server/detail.dart
+++ b/lib/view/page/server/detail.dart
@@ -24,13 +24,13 @@ class ServerDetailPage extends StatefulWidget {
 class _ServerDetailPageState extends State<ServerDetailPage>
     with SingleTickerProviderStateMixin {
   late MediaQueryData _media;
-  late S s;
+  late S _s;
 
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
     _media = MediaQuery.of(context);
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
@@ -315,7 +315,7 @@ class _ServerDetailPageState extends State<ServerDetailPage>
     if (ns.devices.isEmpty) {
       children.add(Center(
         child: Text(
-          s.noInterface,
+          _s.noInterface,
           style: const TextStyle(color: Colors.grey, fontSize: 13),
         ),
       ));
diff --git a/lib/view/page/server/edit.dart b/lib/view/page/server/edit.dart
index 33f2fff9..52938fe4 100644
--- a/lib/view/page/server/edit.dart
+++ b/lib/view/page/server/edit.dart
@@ -25,25 +25,21 @@ class ServerEditPage extends StatefulWidget {
 }
 
 class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
-  final nameController = TextEditingController();
-  final ipController = TextEditingController();
-  final portController = TextEditingController();
-  final usernameController = TextEditingController();
-  final passwordController = TextEditingController();
-  final keyController = TextEditingController();
-  final nameFocus = FocusNode();
-  final ipFocus = FocusNode();
-  final portFocus = FocusNode();
-  final usernameFocus = FocusNode();
-
-  late FocusScopeNode focusScope;
+  final _nameController = TextEditingController();
+  final _ipController = TextEditingController();
+  final _portController = TextEditingController();
+  final _usernameController = TextEditingController();
+  final _passwordController = TextEditingController();
+  final _nameFocus = FocusNode();
+  final _ipFocus = FocusNode();
+  final _portFocus = FocusNode();
+  final _usernameFocus = FocusNode();
 
+  late FocusScopeNode _focusScope;
   late ServerProvider _serverProvider;
-
-  late S s;
+  late S _s;
 
   bool usePublicKey = false;
-
   int? _pubKeyIndex;
   PrivateKeyInfo? _keyInfo;
 
@@ -56,23 +52,23 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
-    focusScope = FocusScope.of(context);
+    _s = S.of(context);
+    _focusScope = FocusScope.of(context);
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(s.edit, style: textSize18),
+        title: Text(_s.edit, style: textSize18),
         actions: [
           widget.spi != null
               ? IconButton(
                   onPressed: () {
                     showRoundDialog(
                       context,
-                      s.attention,
-                      Text(s.sureToDeleteServer(widget.spi!.name)),
+                      _s.attention,
+                      Text(_s.sureToDeleteServer(widget.spi!.name)),
                       [
                         TextButton(
                           onPressed: () {
@@ -81,13 +77,13 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
                             Navigator.of(context).pop();
                           },
                           child: Text(
-                            s.ok,
+                            _s.ok,
                             style: const TextStyle(color: Colors.red),
                           ),
                         ),
                         TextButton(
                           onPressed: () => Navigator.of(context).pop(),
-                          child: Text(s.cancel),
+                          child: Text(_s.cancel),
                         )
                       ],
                     );
@@ -104,44 +100,44 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             TextField(
-              controller: nameController,
+              controller: _nameController,
               keyboardType: TextInputType.text,
-              focusNode: nameFocus,
-              onSubmitted: (_) => focusScope.requestFocus(ipFocus),
-              decoration: buildDecoration(s.name,
-                  icon: Icons.info, hint: s.exampleName),
+              focusNode: _nameFocus,
+              onSubmitted: (_) => _focusScope.requestFocus(_ipFocus),
+              decoration: buildDecoration(_s.name,
+                  icon: Icons.info, hint: _s.exampleName),
             ),
             TextField(
-              controller: ipController,
+              controller: _ipController,
               keyboardType: TextInputType.text,
-              onSubmitted: (_) => focusScope.requestFocus(portFocus),
-              focusNode: ipFocus,
+              onSubmitted: (_) => _focusScope.requestFocus(_portFocus),
+              focusNode: _ipFocus,
               autocorrect: false,
               enableSuggestions: false,
-              decoration: buildDecoration(s.host,
+              decoration: buildDecoration(_s.host,
                   icon: Icons.storage, hint: 'example.com'),
             ),
             TextField(
-              controller: portController,
+              controller: _portController,
               keyboardType: TextInputType.number,
-              focusNode: portFocus,
-              onSubmitted: (_) => focusScope.requestFocus(usernameFocus),
-              decoration: buildDecoration(s.port,
+              focusNode: _portFocus,
+              onSubmitted: (_) => _focusScope.requestFocus(_usernameFocus),
+              decoration: buildDecoration(_s.port,
                   icon: Icons.format_list_numbered, hint: '22'),
             ),
             TextField(
-              controller: usernameController,
+              controller: _usernameController,
               keyboardType: TextInputType.text,
-              focusNode: usernameFocus,
+              focusNode: _usernameFocus,
               autocorrect: false,
               enableSuggestions: false,
-              decoration: buildDecoration(s.user,
+              decoration: buildDecoration(_s.user,
                   icon: Icons.account_box, hint: 'root'),
             ),
             const SizedBox(height: 7),
             Row(
               children: [
-                Text(s.keyAuth),
+                Text(_s.keyAuth),
                 Switch(
                     value: usePublicKey,
                     onChanged: (val) => setState(() => usePublicKey = val)),
@@ -149,11 +145,11 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
             ),
             !usePublicKey
                 ? TextField(
-                    controller: passwordController,
+                    controller: _passwordController,
                     obscureText: true,
                     keyboardType: TextInputType.text,
-                    decoration: buildDecoration(s.pwd,
-                        icon: Icons.password, hint: s.pwd),
+                    decoration: buildDecoration(_s.pwd,
+                        icon: Icons.password, hint: _s.pwd),
                     onSubmitted: (_) => {},
                   )
                 : const SizedBox(),
@@ -175,7 +171,7 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
                           .toList();
                       tiles.add(
                         ListTile(
-                          title: Text(s.addPrivateKey),
+                          title: Text(_s.addPrivateKey),
                           contentPadding: EdgeInsets.zero,
                           trailing: IconButton(
                             icon: const Icon(Icons.add),
@@ -192,7 +188,7 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
                         tilePadding: EdgeInsets.zero,
                         childrenPadding: EdgeInsets.zero,
                         title: Text(
-                          s.choosePrivateKey,
+                          _s.choosePrivateKey,
                           style: const TextStyle(fontSize: 14),
                         ),
                         children: tiles,
@@ -206,22 +202,22 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
       floatingActionButton: FloatingActionButton(
         child: const Icon(Icons.send),
         onPressed: () async {
-          if (ipController.text == '') {
-            showSnackBar(context, Text(s.plzEnterHost));
+          if (_ipController.text == '') {
+            showSnackBar(context, Text(_s.plzEnterHost));
             return;
           }
-          if (!usePublicKey && passwordController.text == '') {
+          if (!usePublicKey && _passwordController.text == '') {
             final cancel = await showRoundDialog<bool>(
               context,
-              s.attention,
-              Text(s.sureNoPwd),
+              _s.attention,
+              Text(_s.sureNoPwd),
               [
                 TextButton(
                     onPressed: () => Navigator.of(context).pop(false),
-                    child: Text(s.ok)),
+                    child: Text(_s.ok)),
                 TextButton(
                     onPressed: () => Navigator.of(context).pop(true),
-                    child: Text(s.cancel))
+                    child: Text(_s.cancel))
               ],
               barrierDismiss: false,
             );
@@ -230,26 +226,26 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
             }
           }
           if (usePublicKey && _pubKeyIndex == -1) {
-            showSnackBar(context, Text(s.plzSelectKey));
+            showSnackBar(context, Text(_s.plzSelectKey));
             return;
           }
-          if (usernameController.text == '') {
-            usernameController.text = 'root';
+          if (_usernameController.text == '') {
+            _usernameController.text = 'root';
           }
-          if (portController.text == '') {
-            portController.text = '22';
+          if (_portController.text == '') {
+            _portController.text = '22';
           }
 
           if (widget.spi != null && widget.spi!.pubKeyId != null) {
             _keyInfo ??= locator<PrivateKeyStore>().get(widget.spi!.pubKeyId!);
           }
 
-          final authorization = passwordController.text;
+          final authorization = _passwordController.text;
           final spi = ServerPrivateInfo(
-            name: nameController.text,
-            ip: ipController.text,
-            port: int.parse(portController.text),
-            user: usernameController.text,
+            name: _nameController.text,
+            ip: _ipController.text,
+            port: int.parse(_portController.text),
+            user: _usernameController.text,
             pwd: authorization,
             pubKeyId: usePublicKey ? _keyInfo!.id : null,
           );
@@ -282,12 +278,12 @@ class _ServerEditPageState extends State<ServerEditPage> with AfterLayoutMixin {
   @override
   void afterFirstLayout(BuildContext context) {
     if (widget.spi != null) {
-      nameController.text = widget.spi?.name ?? '';
-      ipController.text = widget.spi?.ip ?? '';
-      portController.text = (widget.spi?.port ?? 22).toString();
-      usernameController.text = widget.spi?.user ?? '';
+      _nameController.text = widget.spi?.name ?? '';
+      _ipController.text = widget.spi?.ip ?? '';
+      _portController.text = (widget.spi?.port ?? 22).toString();
+      _usernameController.text = widget.spi?.user ?? '';
       if (widget.spi?.pubKeyId == null) {
-        passwordController.text = widget.spi?.pwd ?? '';
+        _passwordController.text = widget.spi?.pwd ?? '';
       } else {
         usePublicKey = true;
       }
diff --git a/lib/view/page/server/tab.dart b/lib/view/page/server/tab.dart
index f5e7c316..a357652f 100644
--- a/lib/view/page/server/tab.dart
+++ b/lib/view/page/server/tab.dart
@@ -33,9 +33,8 @@ class _ServerPageState extends State<ServerPage>
   late MediaQueryData _media;
   late ThemeData _theme;
   late Color _primaryColor;
-
   late ServerProvider _serverProvider;
-  late S s;
+  late S _s;
 
   @override
   void initState() {
@@ -49,7 +48,7 @@ class _ServerPageState extends State<ServerPage>
     _media = MediaQuery.of(context);
     _theme = Theme.of(context);
     _primaryColor = primaryColor;
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
@@ -60,7 +59,7 @@ class _ServerPageState extends State<ServerPage>
         if (pro.servers.isEmpty) {
           return Center(
             child: Text(
-              s.serverTabEmpty,
+              _s.serverTabEmpty,
               textAlign: TextAlign.center,
             ),
           );
@@ -87,7 +86,7 @@ class _ServerPageState extends State<ServerPage>
         onPressed: () =>
             AppRoute(const ServerEditPage(), 'Add server info page')
                 .go(context),
-        tooltip: s.addAServer,
+        tooltip: _s.addAServer,
         heroTag: 'server page fab',
         child: const Icon(Icons.add),
       ),
@@ -155,8 +154,8 @@ class _ServerPageState extends State<ServerPage>
                   hasError
                       ? GestureDetector(
                           onTap: () => showRoundDialog(
-                              context, s.error, Text(ss.failedInfo ?? ''), []),
-                          child: Text(s.clickSee, style: style))
+                              context, _s.error, Text(ss.failedInfo ?? ''), []),
+                          child: Text(_s.clickSee, style: style))
                       : Text(topRightStr, style: style, textScaleFactor: 1.0),
                   _buildMoreBtn(spi),
                 ],
@@ -248,11 +247,11 @@ class _ServerPageState extends State<ServerPage>
       String? failedInfo) {
     switch (cs) {
       case ServerConnectionState.disconnected:
-        return s.disconnected;
+        return _s.disconnected;
       case ServerConnectionState.connected:
         if (temp == '') {
           if (upTime == '') {
-            return s.serverTabLoading;
+            return _s.serverTabLoading;
           } else {
             return upTime;
           }
@@ -264,17 +263,17 @@ class _ServerPageState extends State<ServerPage>
           }
         }
       case ServerConnectionState.connecting:
-        return s.serverTabConnecting;
+        return _s.serverTabConnecting;
       case ServerConnectionState.failed:
         if (failedInfo == null) {
-          return s.serverTabFailed;
+          return _s.serverTabFailed;
         }
         if (failedInfo.contains('encypted')) {
-          return s.serverTabPlzSave;
+          return _s.serverTabPlzSave;
         }
         return failedInfo;
       default:
-        return s.serverTabUnkown;
+        return _s.serverTabUnkown;
     }
   }
 
diff --git a/lib/view/page/setting.dart b/lib/view/page/setting.dart
index c30b6493..466dc8fd 100644
--- a/lib/view/page/setting.dart
+++ b/lib/view/page/setting.dart
@@ -30,7 +30,7 @@ class _SettingPageState extends State<SettingPage> {
   late final ServerProvider _serverProvider;
   late MediaQueryData _media;
   late ThemeData _theme;
-  late S s;
+  late S _s;
 
   var _intervalValue = 0.0;
 
@@ -40,7 +40,7 @@ class _SettingPageState extends State<SettingPage> {
     priColor = primaryColor;
     _media = MediaQuery.of(context);
     _theme = Theme.of(context);
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
@@ -56,7 +56,7 @@ class _SettingPageState extends State<SettingPage> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(s.setting),
+        title: Text(_s.setting),
       ),
       body: ListView(
         padding: const EdgeInsets.all(17),
@@ -76,12 +76,12 @@ class _SettingPageState extends State<SettingPage> {
         String display;
         if (app.newestBuild != null) {
           if (app.newestBuild! > BuildData.build) {
-            display = s.versionHaveUpdate(app.newestBuild!);
+            display = _s.versionHaveUpdate(app.newestBuild!);
           } else {
-            display = s.versionUpdated(BuildData.build);
+            display = _s.versionUpdated(BuildData.build);
           }
         } else {
-          display = s.versionUnknownUpdate(BuildData.build);
+          display = _s.versionUnknownUpdate(BuildData.build);
         }
         return ListTile(
           contentPadding: roundRectCardPadding,
@@ -103,15 +103,15 @@ class _SettingPageState extends State<SettingPage> {
       childrenPadding: roundRectCardPadding,
       textColor: priColor,
       title: Text(
-        s.updateServerStatusInterval,
+        _s.updateServerStatusInterval,
         style: textSize13,
         textAlign: TextAlign.start,
       ),
       subtitle: Text(
-        s.willTakEeffectImmediately,
+        _s.willTakEeffectImmediately,
         style: const TextStyle(color: Colors.grey, fontSize: 13),
       ),
-      trailing: Text('${_intervalValue.toInt()} ${s.second}'),
+      trailing: Text('${_intervalValue.toInt()} ${_s.second}'),
       children: [
         Slider(
           thumbColor: priColor,
@@ -128,7 +128,7 @@ class _SettingPageState extends State<SettingPage> {
             _store.serverStatusUpdateInterval.put(val.toInt());
             _serverProvider.startAutoRefresh();
           },
-          label: '${_intervalValue.toInt()} ${s.second}',
+          label: '${_intervalValue.toInt()} ${_s.second}',
           divisions: 10,
         ),
         const SizedBox(
@@ -136,7 +136,7 @@ class _SettingPageState extends State<SettingPage> {
         ),
         _intervalValue == 0.0
             ? Text(
-                s.updateIntervalEqual0,
+                _s.updateIntervalEqual0,
                 style: const TextStyle(color: Colors.grey, fontSize: 12),
                 textAlign: TextAlign.center,
               )
@@ -161,7 +161,7 @@ class _SettingPageState extends State<SettingPage> {
         ),
       ),
       title: Text(
-        s.appPrimaryColor,
+        _s.appPrimaryColor,
         style: textSize13,
       ),
       children: [_buildAppColorPicker(priColor), _buildColorPickerConfirmBtn()],
@@ -193,7 +193,7 @@ class _SettingPageState extends State<SettingPage> {
       tilePadding: roundRectCardPadding,
       childrenPadding: roundRectCardPadding,
       title: Text(
-        s.launchPage,
+        _s.launchPage,
         style: textSize13,
       ),
       trailing: ConstrainedBox(
diff --git a/lib/view/page/sftp/downloaded.dart b/lib/view/page/sftp/downloaded.dart
index 83e4c5e1..95c8ecb2 100644
--- a/lib/view/page/sftp/downloaded.dart
+++ b/lib/view/page/sftp/downloaded.dart
@@ -23,8 +23,7 @@ class SFTPDownloadedPage extends StatefulWidget {
 class _SFTPDownloadedPageState extends State<SFTPDownloadedPage> {
   PathWithPrefix? _path;
   String? _prefixPath;
-  late S s;
-  late ThemeData _theme;
+  late S _s;
 
   @override
   void initState() {
@@ -39,15 +38,14 @@ class _SFTPDownloadedPageState extends State<SFTPDownloadedPage> {
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
-    _theme = Theme.of(context);
+    _s = S.of(context);
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(s.download),
+        title: Text(_s.download),
         actions: [
           IconButton(
             icon: const Icon(Icons.downloading),
@@ -68,7 +66,7 @@ class _SFTPDownloadedPageState extends State<SFTPDownloadedPage> {
       floatingActionButton: FloatingActionButton(
         onPressed: (() {
           if (_path!.path == _prefixPath) {
-            showSnackBar(context, Text(s.alreadyLastDir));
+            showSnackBar(context, Text(_s.alreadyLastDir));
             return;
           }
           _path!.update('..');
@@ -80,18 +78,13 @@ class _SFTPDownloadedPageState extends State<SFTPDownloadedPage> {
   }
 
   Widget _buildPath() {
-    final color = _theme.scaffoldBackgroundColor;
     return Container(
-      color: color,
       padding: const EdgeInsets.fromLTRB(11, 7, 11, 11),
       child: Column(
         mainAxisSize: MainAxisSize.min,
         children: [
           const Divider(),
-          (_path?.path ?? s.loadingFiles).omitStartStr(
-            style: TextStyle(
-                color: color.isBrightColor ? Colors.black : Colors.white),
-          )
+          (_path?.path ?? _s.loadingFiles).omitStartStr(),
         ],
       ),
     );
@@ -142,30 +135,30 @@ class _SFTPDownloadedPageState extends State<SFTPDownloadedPage> {
     final fileName = file.path.split('/').last;
     showRoundDialog(
       context,
-      s.choose,
+      _s.choose,
       Column(
         mainAxisSize: MainAxisSize.min,
         children: [
           ListTile(
             leading: const Icon(Icons.delete),
-            title: Text(s.delete),
+            title: Text(_s.delete),
             onTap: () {
               Navigator.of(context).pop();
               showRoundDialog(
                 context,
-                s.sureDelete(fileName),
+                _s.sureDelete(fileName),
                 const SizedBox(),
                 [
                   TextButton(
                       onPressed: () => Navigator.of(context).pop(),
-                      child: Text(s.cancel)),
+                      child: Text(_s.cancel)),
                   TextButton(
                     onPressed: () {
                       file.deleteSync();
                       setState(() {});
                       Navigator.of(context).pop();
                     },
-                    child: Text(s.ok),
+                    child: Text(_s.ok),
                   ),
                 ],
               );
@@ -173,7 +166,7 @@ class _SFTPDownloadedPageState extends State<SFTPDownloadedPage> {
           ),
           ListTile(
             leading: const Icon(Icons.open_in_new),
-            title: Text(s.open),
+            title: Text(_s.open),
             onTap: () {
               shareFiles(context, [file.absolute.path]);
             },
@@ -183,7 +176,7 @@ class _SFTPDownloadedPageState extends State<SFTPDownloadedPage> {
       [
         TextButton(
             onPressed: (() => Navigator.of(context).pop()),
-            child: Text(s.close))
+            child: Text(_s.close))
       ],
     );
   }
diff --git a/lib/view/page/sftp/downloading.dart b/lib/view/page/sftp/downloading.dart
index bd5461cb..67a61e0d 100644
--- a/lib/view/page/sftp/downloading.dart
+++ b/lib/view/page/sftp/downloading.dart
@@ -17,12 +17,12 @@ class SFTPDownloadingPage extends StatefulWidget {
 }
 
 class _SFTPDownloadingPageState extends State<SFTPDownloadingPage> {
-  late S s;
+  late S _s;
 
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
@@ -30,7 +30,7 @@ class _SFTPDownloadingPageState extends State<SFTPDownloadingPage> {
     return Scaffold(
       appBar: AppBar(
         title: Text(
-          s.download,
+          _s.download,
           style: textSize18,
         ),
       ),
@@ -42,7 +42,7 @@ class _SFTPDownloadingPageState extends State<SFTPDownloadingPage> {
     return Consumer<SftpDownloadProvider>(builder: (__, pro, _) {
       if (pro.status.isEmpty) {
         return Center(
-          child: Text(s.sftpNoDownloadTask),
+          child: Text(_s.sftpNoDownloadTask),
         );
       }
       return ListView.builder(
@@ -81,7 +81,7 @@ class _SFTPDownloadingPageState extends State<SFTPDownloadingPage> {
         final time = status.spentTime.toString();
         return _wrapInCard(
           status,
-          '${s.downloadFinished} ${s.spentTime(time == 'null' ? s.unknown : (time.substring(0, time.length - 7)))}',
+          '${_s.downloadFinished} ${_s.spentTime(time == 'null' ? _s.unknown : (time.substring(0, time.length - 7)))}',
           trailing: IconButton(
             onPressed: () => shareFiles(context, [status.item.localPath]),
             icon: const Icon(Icons.open_in_new),
@@ -90,18 +90,18 @@ class _SFTPDownloadingPageState extends State<SFTPDownloadingPage> {
       case SftpWorkerStatus.downloading:
         return _wrapInCard(
             status,
-            s.downloadStatus((status.progress ?? 0.0).toStringAsFixed(2),
+            _s.downloadStatus((status.progress ?? 0.0).toStringAsFixed(2),
                 (status.size ?? 0).convertBytes),
             trailing:
                 CircularProgressIndicator(value: (status.progress ?? 0) / 100));
       case SftpWorkerStatus.preparing:
-        return _wrapInCard(status, s.sftpDlPrepare, trailing: loadingIcon);
+        return _wrapInCard(status, _s.sftpDlPrepare, trailing: loadingIcon);
       case SftpWorkerStatus.sshConnectted:
-        return _wrapInCard(status, s.sftpSSHConnected, trailing: loadingIcon);
+        return _wrapInCard(status, _s.sftpSSHConnected, trailing: loadingIcon);
       default:
         return _wrapInCard(
           status,
-          s.unknown,
+          _s.unknown,
           trailing: const Icon(
             Icons.error,
             size: 40,
diff --git a/lib/view/page/sftp/view.dart b/lib/view/page/sftp/view.dart
index 6fbb075c..3d714643 100644
--- a/lib/view/page/sftp/view.dart
+++ b/lib/view/page/sftp/view.dart
@@ -35,13 +35,13 @@ class _SFTPPageState extends State<SFTPPage> {
   final ScrollController _scrollController = ScrollController();
 
   late MediaQueryData _media;
-  late S s;
+  late S _s;
 
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
     _media = MediaQuery.of(context);
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
@@ -61,24 +61,24 @@ class _SFTPPageState extends State<SFTPPage> {
           IconButton(
             onPressed: (() => showRoundDialog(
                   context,
-                  s.choose,
+                  _s.choose,
                   Column(
                     mainAxisSize: MainAxisSize.min,
                     children: [
                       ListTile(
                           leading: const Icon(Icons.folder),
-                          title: Text(s.createFolder),
+                          title: Text(_s.createFolder),
                           onTap: () => mkdir(context)),
                       ListTile(
                           leading: const Icon(Icons.insert_drive_file),
-                          title: Text(s.createFile),
+                          title: Text(_s.createFile),
                           onTap: () => newFile(context)),
                     ],
                   ),
                   [
                     TextButton(
                         onPressed: () => Navigator.of(context).pop(),
-                        child: Text(s.close))
+                        child: Text(_s.close))
                   ],
                 )),
             icon: const Icon(Icons.add),
@@ -167,24 +167,24 @@ class _SFTPPageState extends State<SFTPPage> {
   void onItemPress(BuildContext context, SftpName file, bool showDownload) {
     showRoundDialog(
       context,
-      s.choose,
+      _s.choose,
       Column(
         mainAxisSize: MainAxisSize.min,
         children: [
           ListTile(
             leading: const Icon(Icons.delete),
-            title: Text(s.delete),
+            title: Text(_s.delete),
             onTap: () => delete(context, file),
           ),
           ListTile(
             leading: const Icon(Icons.edit),
-            title: Text(s.rename),
+            title: Text(_s.rename),
             onTap: () => rename(context, file),
           ),
           showDownload
               ? ListTile(
                   leading: const Icon(Icons.download),
-                  title: Text(s.download),
+                  title: Text(_s.download),
                   onTap: () => download(context, file),
                 )
               : const SizedBox()
@@ -192,7 +192,8 @@ class _SFTPPageState extends State<SFTPPage> {
       ),
       [
         TextButton(
-            onPressed: () => Navigator.of(context).pop(), child: Text(s.cancel))
+            onPressed: () => Navigator.of(context).pop(),
+            child: Text(_s.cancel))
       ],
     );
   }
@@ -200,12 +201,12 @@ class _SFTPPageState extends State<SFTPPage> {
   void download(BuildContext context, SftpName name) {
     showRoundDialog(
       context,
-      s.download,
-      Text('${s.dl2Local(name.filename)}\n${s.keepForeground}'),
+      _s.download,
+      Text('${_s.dl2Local(name.filename)}\n${_s.keepForeground}'),
       [
         TextButton(
             onPressed: () => Navigator.of(context).pop(),
-            child: Text(s.cancel)),
+            child: Text(_s.cancel)),
         TextButton(
           onPressed: () async {
             Navigator.of(context).pop();
@@ -229,12 +230,12 @@ class _SFTPPageState extends State<SFTPPage> {
             Navigator.of(context).pop();
             showRoundDialog(
               context,
-              s.goSftpDlPage,
+              _s.goSftpDlPage,
               const SizedBox(),
               [
                 TextButton(
                   onPressed: () => Navigator.of(context).pop(),
-                  child: Text(s.cancel),
+                  child: Text(_s.cancel),
                 ),
                 TextButton(
                   onPressed: () {
@@ -242,12 +243,12 @@ class _SFTPPageState extends State<SFTPPage> {
                     AppRoute(const SFTPDownloadingPage(), 'sftp downloading')
                         .go(context);
                   },
-                  child: Text(s.ok),
+                  child: Text(_s.ok),
                 )
               ],
             );
           },
-          child: Text(s.download),
+          child: Text(_s.download),
         )
       ],
     );
@@ -257,8 +258,8 @@ class _SFTPPageState extends State<SFTPPage> {
     Navigator.of(context).pop();
     showRoundDialog(
       context,
-      s.attention,
-      Text(s.sureDelete(file.filename)),
+      _s.attention,
+      Text(_s.sureDelete(file.filename)),
       [
         TextButton(
             onPressed: () => Navigator.of(context).pop(),
@@ -270,7 +271,7 @@ class _SFTPPageState extends State<SFTPPage> {
             listDir();
           },
           child: Text(
-            s.delete,
+            _s.delete,
             style: const TextStyle(color: Colors.red),
           ),
         ),
@@ -283,29 +284,29 @@ class _SFTPPageState extends State<SFTPPage> {
     final textController = TextEditingController();
     showRoundDialog(
       context,
-      s.createFolder,
+      _s.createFolder,
       TextField(
         controller: textController,
         decoration: InputDecoration(
-          labelText: s.name,
+          labelText: _s.name,
         ),
       ),
       [
         TextButton(
           onPressed: () => Navigator.of(context).pop(),
-          child: Text(s.cancel),
+          child: Text(_s.cancel),
         ),
         TextButton(
           onPressed: () {
             if (textController.text == '') {
               showRoundDialog(
                 context,
-                s.attention,
-                Text(s.fieldMustNotEmpty),
+                _s.attention,
+                Text(_s.fieldMustNotEmpty),
                 [
                   TextButton(
                       onPressed: () => Navigator.of(context).pop(),
-                      child: Text(s.ok)),
+                      child: Text(_s.ok)),
                 ],
               );
               return;
@@ -316,7 +317,7 @@ class _SFTPPageState extends State<SFTPPage> {
             listDir();
           },
           child: Text(
-            s.ok,
+            _s.ok,
             style: const TextStyle(color: Colors.red),
           ),
         ),
@@ -329,29 +330,29 @@ class _SFTPPageState extends State<SFTPPage> {
     final textController = TextEditingController();
     showRoundDialog(
       context,
-      s.createFile,
+      _s.createFile,
       TextField(
         controller: textController,
         decoration: InputDecoration(
-          labelText: s.name,
+          labelText: _s.name,
         ),
       ),
       [
         TextButton(
           onPressed: () => Navigator.of(context).pop(),
-          child: Text(s.cancel),
+          child: Text(_s.cancel),
         ),
         TextButton(
           onPressed: () async {
             if (textController.text == '') {
               showRoundDialog(
                 context,
-                s.attention,
-                Text(s.fieldMustNotEmpty),
+                _s.attention,
+                Text(_s.fieldMustNotEmpty),
                 [
                   TextButton(
                     onPressed: () => Navigator.of(context).pop(),
-                    child: Text(s.ok),
+                    child: Text(_s.ok),
                   ),
                 ],
               );
@@ -364,7 +365,7 @@ class _SFTPPageState extends State<SFTPPage> {
             listDir();
           },
           child: Text(
-            s.ok,
+            _s.ok,
             style: const TextStyle(color: Colors.red),
           ),
         ),
@@ -377,28 +378,28 @@ class _SFTPPageState extends State<SFTPPage> {
     final textController = TextEditingController();
     showRoundDialog(
       context,
-      s.rename,
+      _s.rename,
       TextField(
         controller: textController,
         decoration: InputDecoration(
-          labelText: s.name,
+          labelText: _s.name,
         ),
       ),
       [
         TextButton(
             onPressed: () => Navigator.of(context).pop(),
-            child: Text(s.cancel)),
+            child: Text(_s.cancel)),
         TextButton(
           onPressed: () async {
             if (textController.text == '') {
               showRoundDialog(
                 context,
-                s.attention,
-                Text(s.fieldMustNotEmpty),
+                _s.attention,
+                Text(_s.fieldMustNotEmpty),
                 [
                   TextButton(
                     onPressed: () => Navigator.of(context).pop(),
-                    child: Text(s.ok),
+                    child: Text(_s.ok),
                   ),
                 ],
               );
@@ -409,7 +410,7 @@ class _SFTPPageState extends State<SFTPPage> {
             listDir();
           },
           child: Text(
-            s.rename,
+            _s.rename,
             style: const TextStyle(color: Colors.red),
           ),
         ),
@@ -440,12 +441,12 @@ class _SFTPPageState extends State<SFTPPage> {
     } catch (e) {
       await showRoundDialog(
         context,
-        s.error,
+        _s.error,
         Text(e.toString()),
         [
           TextButton(
             onPressed: () => Navigator.of(context).pop(),
-            child: Text(s.ok),
+            child: Text(_s.ok),
           )
         ],
       );
@@ -458,7 +459,7 @@ class _SFTPPageState extends State<SFTPPage> {
   Widget _buildDestSelector() {
     final str = _status.path?.path;
     return ExpansionTile(
-        title: Text(_status.spi?.name ?? s.chooseDestination),
+        title: Text(_status.spi?.name ?? _s.chooseDestination),
         subtitle: _status.selected
             ? str!.omitStartStr(style: const TextStyle(color: Colors.grey))
             : null,
diff --git a/lib/view/page/snippet/edit.dart b/lib/view/page/snippet/edit.dart
index 5eaf2374..bf8882b8 100644
--- a/lib/view/page/snippet/edit.dart
+++ b/lib/view/page/snippet/edit.dart
@@ -19,12 +19,12 @@ class SnippetEditPage extends StatefulWidget {
 
 class _SnippetEditPageState extends State<SnippetEditPage>
     with AfterLayoutMixin {
-  final nameController = TextEditingController();
-  final scriptController = TextEditingController();
-  final scriptNode = FocusNode();
+  final _nameController = TextEditingController();
+  final _scriptController = TextEditingController();
+  final _scriptNode = FocusNode();
 
   late SnippetProvider _provider;
-  late S s;
+  late S _s;
 
   @override
   void initState() {
@@ -35,14 +35,14 @@ class _SnippetEditPageState extends State<SnippetEditPage>
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(s.edit, style: textSize18),
+        title: Text(_s.edit, style: textSize18),
         actions: [
           widget.snippet != null
               ? IconButton(
@@ -50,7 +50,7 @@ class _SnippetEditPageState extends State<SnippetEditPage>
                     _provider.del(widget.snippet!);
                     Navigator.of(context).pop();
                   },
-                  tooltip: s.delete,
+                  tooltip: _s.delete,
                   icon: const Icon(Icons.delete))
               : const SizedBox()
         ],
@@ -59,30 +59,31 @@ class _SnippetEditPageState extends State<SnippetEditPage>
         padding: const EdgeInsets.all(13),
         children: [
           TextField(
-            controller: nameController,
+            controller: _nameController,
             keyboardType: TextInputType.text,
-            onSubmitted: (_) => FocusScope.of(context).requestFocus(scriptNode),
-            decoration: buildDecoration(s.name, icon: Icons.info),
+            onSubmitted: (_) =>
+                FocusScope.of(context).requestFocus(_scriptNode),
+            decoration: buildDecoration(_s.name, icon: Icons.info),
           ),
           TextField(
-            controller: scriptController,
+            controller: _scriptController,
             autocorrect: false,
-            focusNode: scriptNode,
+            focusNode: _scriptNode,
             minLines: 3,
             maxLines: 10,
             keyboardType: TextInputType.text,
             enableSuggestions: false,
-            decoration: buildDecoration(s.snippet, icon: Icons.code),
+            decoration: buildDecoration(_s.snippet, icon: Icons.code),
           ),
         ],
       ),
       floatingActionButton: FloatingActionButton(
         child: const Icon(Icons.send),
         onPressed: () {
-          final name = nameController.text;
-          final script = scriptController.text;
+          final name = _nameController.text;
+          final script = _scriptController.text;
           if (name.isEmpty || script.isEmpty) {
-            showSnackBar(context, Text(s.fieldMustNotEmpty));
+            showSnackBar(context, Text(_s.fieldMustNotEmpty));
             return;
           }
           final snippet = Snippet(name, script);
@@ -100,8 +101,8 @@ class _SnippetEditPageState extends State<SnippetEditPage>
   @override
   void afterFirstLayout(BuildContext context) {
     if (widget.snippet != null) {
-      nameController.text = widget.snippet!.name;
-      scriptController.text = widget.snippet!.script;
+      _nameController.text = widget.snippet!.name;
+      _scriptController.text = widget.snippet!.script;
     }
   }
 }
diff --git a/lib/view/page/snippet/list.dart b/lib/view/page/snippet/list.dart
index 73a81608..e88f4b0e 100644
--- a/lib/view/page/snippet/list.dart
+++ b/lib/view/page/snippet/list.dart
@@ -27,19 +27,19 @@ class _SnippetListPageState extends State<SnippetListPage> {
 
   final _textStyle = TextStyle(color: primaryColor);
 
-  late S s;
+  late S _s;
 
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    s = S.of(context);
+    _s = S.of(context);
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(s.snippet, style: textSize18),
+        title: Text(_s.snippet, style: textSize18),
       ),
       body: _buildBody(),
       floatingActionButton: FloatingActionButton(
@@ -79,7 +79,7 @@ class _SnippetListPageState extends State<SnippetListPage> {
                                         'snippet edit page')
                                     .go(context),
                                 child: Text(
-                                  s.edit,
+                                  _s.edit,
                                   style: _textStyle,
                                 ),
                               ),
@@ -93,7 +93,7 @@ class _SnippetListPageState extends State<SnippetListPage> {
                                   run(context, snippet);
                                 },
                                 child: Text(
-                                  s.run,
+                                  _s.run,
                                   style: _textStyle,
                                 ),
                               )
@@ -106,7 +106,7 @@ class _SnippetListPageState extends State<SnippetListPage> {
                 },
               )
             : Center(
-                child: Text(s.noSavedSnippet),
+                child: Text(_s.noSavedSnippet),
               );
       },
     );
@@ -115,11 +115,11 @@ class _SnippetListPageState extends State<SnippetListPage> {
   void _showRunDialog(Snippet snippet) {
     showRoundDialog(
       context,
-      s.chooseDestination,
+      _s.chooseDestination,
       Consumer<ServerProvider>(
         builder: (_, provider, __) {
           if (provider.servers.isEmpty) {
-            return Text(s.noServerAvailable);
+            return Text(_s.noServerAvailable);
           }
           _selectedIndex = provider.servers.first.info;
           return SizedBox(
@@ -163,11 +163,11 @@ class _SnippetListPageState extends State<SnippetListPage> {
       [
         TextButton(
           onPressed: () async => run(context, snippet),
-          child: Text(s.run),
+          child: Text(_s.run),
         ),
         TextButton(
           onPressed: () => Navigator.of(context).pop(),
-          child: Text(s.cancel),
+          child: Text(_s.cancel),
         ),
       ],
     );
@@ -179,12 +179,12 @@ class _SnippetListPageState extends State<SnippetListPage> {
     if (result != null) {
       showRoundDialog(
         context,
-        s.result,
+        _s.result,
         Text(result, style: const TextStyle(fontSize: 13)),
         [
           TextButton(
             onPressed: () => Navigator.of(context).pop(),
-            child: Text(s.close),
+            child: Text(_s.close),
           )
         ],
       );