add local/remote file manager

lib/common.dart

@@ -1,9 +1,10 @@
 import 'package:flutter/material.dart';
 import 'dart:async';
 import 'package:flutter_easyloading/flutter_easyloading.dart';
-import 'package:flutter_hbb/main.dart';
 import 'package:tuple/tuple.dart';
 
+final globalKey = GlobalKey<NavigatorState>();
+
 typedef F = String Function(String);
 typedef FMethod = String Function(String, dynamic);
 

lib/main.dart

@@ -4,6 +4,7 @@ import 'package:provider/provider.dart';
 import 'package:firebase_analytics/firebase_analytics.dart';
 import 'package:firebase_analytics/observer.dart';
 import 'package:firebase_core/firebase_core.dart';
+import 'common.dart';
 import 'models/model.dart';
 import 'pages/home_page.dart';
 import 'pages/server_page.dart';
@@ -16,7 +17,6 @@ Future<Null> main() async {
   runApp(App());
 }
 
-final globalKey = GlobalKey<NavigatorState>();
 class App extends StatelessWidget {
 
   @override

lib/models/file_model.dart

@@ -0,0 +1,407 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+
+import 'model.dart';
+
+
+// enum FileType {
+//   Dir = 0,
+//   DirLink = 2,
+//   DirDrive = 3,
+//   File = 4,
+//   FileLink = 5,
+// }
+
+class FileDirectory {
+  // List<Entry> entries = [];
+  List<FileSystemEntity> entries = [];
+  int id = 0;
+  String path = "";
+
+  FileDirectory();
+
+  FileDirectory.fromJson(Map<String, dynamic> json) {
+    id = json['id'];
+    path = json['path'];
+    if (json['entries'] != null) {
+      entries = <FileSystemEntity>[];
+      json['entries'].forEach((v) {
+        entries.add(new Entry.fromJson(v).toFileSystemEntity(path));
+      });
+    }
+  }
+
+  // Map<String, dynamic> toJson() {
+  //   final Map<String, dynamic> data = new Map<String, dynamic>();
+  //   data['entries'] = this.entries.map((v) => v.toJson()).toList();
+  //   data['id'] = this.id;
+  //   data['path'] = this.path;
+  //   return data;
+  // }
+
+  clear(){
+    entries = [];
+    id = 0;
+    path = "";
+  }
+}
+
+class Entry {
+  int entryType = 4;
+  int modifiedTime = 0;
+  String name = "";
+  int size = 0;
+
+  Entry();
+
+  Entry.fromJson(Map<String, dynamic> json) {
+    entryType = json['entry_type'];
+    modifiedTime = json['modified_time'];
+    name = json['name'];
+    size = json['size'];
+  }
+
+  FileSystemEntity toFileSystemEntity(String parentPath){
+    // is dir
+    if(entryType<=3){
+      return RemoteDir("$parentPath/$name");
+    }else {
+      return RemoteFile("$parentPath/$name",modifiedTime,size);
+    }
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = new Map<String, dynamic>();
+    data['entry_type'] = this.entryType;
+    data['modified_time'] = this.modifiedTime;
+    data['name'] = this.name;
+    data['size'] = this.size;
+    return data;
+  }
+}
+
+
+// TODO 使用工厂单例模式
+
+class RemoteFileModel extends ChangeNotifier{
+
+  FileDirectory _currentRemoteDir = FileDirectory();
+
+  FileDirectory get currentRemoteDir => _currentRemoteDir;
+
+  tryUpdateRemoteDir(String fd){
+    debugPrint("tryUpdateRemoteDir:$fd");
+    try{
+      final fileDir = FileDirectory.fromJson(jsonDecode(fd));
+      _currentRemoteDir = fileDir;
+      debugPrint("_currentRemoteDir:${_currentRemoteDir.path}");
+      notifyListeners();
+    }catch(e){
+      debugPrint("tryUpdateRemoteDir fail:$fd");
+    }
+  }
+
+  goToParentDirectory(){
+    var parentPath = "";
+    if(_currentRemoteDir.path == ""){
+      parentPath = "";
+    }else{
+      parentPath = Directory(_currentRemoteDir.path).parent.path;
+    }
+    FFI.setByName("read_remote_dir", parentPath);
+  }
+  @override
+  void dispose() {
+    _currentRemoteDir.clear();
+    super.dispose();
+  }
+}
+
+
+class RemoteDir extends FileSystemEntity implements Directory{
+
+  // int entryType = 4;
+  // int modifiedTime = 0;
+  // String name = "";
+  // int size = 0;
+
+
+  String path;
+
+  RemoteDir(this.path);
+
+
+  @override
+  // TODO: implement absolute
+  Directory get absolute => throw UnimplementedError();
+
+  @override
+  Future<Directory> create({bool recursive = false}) {
+    // TODO: implement create
+    throw UnimplementedError();
+  }
+
+  @override
+  void createSync({bool recursive = false}) {
+    // TODO: implement createSync
+  }
+
+  @override
+  Future<Directory> createTemp([String? prefix]) {
+    // TODO: implement createTemp
+    throw UnimplementedError();
+  }
+
+  @override
+  Directory createTempSync([String? prefix]) {
+    // TODO: implement createTempSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<bool> exists() {
+    // TODO: implement exists
+    throw UnimplementedError();
+  }
+
+  @override
+  bool existsSync() {
+    // TODO: implement existsSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Stream<FileSystemEntity> list({bool recursive = false, bool followLinks = true}) {
+    // TODO: implement list
+    throw UnimplementedError();
+  }
+
+  @override
+  List<FileSystemEntity> listSync({bool recursive = false, bool followLinks = true}) {
+    // TODO: implement listSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<Directory> rename(String newPath) {
+    // TODO: implement rename
+    throw UnimplementedError();
+  }
+
+  @override
+  Directory renameSync(String newPath) {
+    // TODO: implement renameSync
+    throw UnimplementedError();
+  }
+
+}
+
+class RemoteFile extends FileSystemEntity implements File {
+
+  // int entryType = 4;
+  // int modifiedTime = 0;
+  // String name = "";
+  // int size = 0;
+
+  RemoteFile(this.path,this.modifiedTime,this.size);
+
+  var path;
+  var modifiedTime;
+  var size;
+
+
+  @override
+  DateTime lastModifiedSync() {
+    return DateTime.fromMillisecondsSinceEpoch(modifiedTime * 1000);
+  }
+
+  @override
+  int lengthSync() {
+    return size;
+  }
+
+  // ***************************
+
+  @override
+  Future<int> length() {
+    // TODO: implement length
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<DateTime> lastModified() {
+    // TODO: implement lastModified
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<File> copy(String newPath) {
+    // TODO: implement copy
+    throw UnimplementedError();
+  }
+
+  @override
+  File copySync(String newPath) {
+    // TODO: implement copySync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<File> create({bool recursive = false}) {
+    // TODO: implement create
+    throw UnimplementedError();
+  }
+
+  @override
+  void createSync({bool recursive = false}) {
+    // TODO: implement createSync
+  }
+
+  @override
+  Future<bool> exists() {
+    // TODO: implement exists
+    throw UnimplementedError();
+  }
+
+  @override
+  bool existsSync() {
+    // TODO: implement existsSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<DateTime> lastAccessed() {
+    // TODO: implement lastAccessed
+    throw UnimplementedError();
+  }
+
+  @override
+  DateTime lastAccessedSync() {
+    // TODO: implement lastAccessedSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<RandomAccessFile> open({FileMode mode = FileMode.read}) {
+    // TODO: implement open
+    throw UnimplementedError();
+  }
+
+  @override
+  Stream<List<int>> openRead([int? start, int? end]) {
+    // TODO: implement openRead
+    throw UnimplementedError();
+  }
+
+  @override
+  RandomAccessFile openSync({FileMode mode = FileMode.read}) {
+    // TODO: implement openSync
+    throw UnimplementedError();
+  }
+
+  @override
+  IOSink openWrite({FileMode mode = FileMode.write, Encoding encoding = utf8}) {
+    // TODO: implement openWrite
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<Uint8List> readAsBytes() {
+    // TODO: implement readAsBytes
+    throw UnimplementedError();
+  }
+
+  @override
+  Uint8List readAsBytesSync() {
+    // TODO: implement readAsBytesSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<List<String>> readAsLines({Encoding encoding = utf8}) {
+    // TODO: implement readAsLines
+    throw UnimplementedError();
+  }
+
+  @override
+  List<String> readAsLinesSync({Encoding encoding = utf8}) {
+    // TODO: implement readAsLinesSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<String> readAsString({Encoding encoding = utf8}) {
+    // TODO: implement readAsString
+    throw UnimplementedError();
+  }
+
+  @override
+  String readAsStringSync({Encoding encoding = utf8}) {
+    // TODO: implement readAsStringSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<File> rename(String newPath) {
+    // TODO: implement rename
+    throw UnimplementedError();
+  }
+
+  @override
+  File renameSync(String newPath) {
+    // TODO: implement renameSync
+    throw UnimplementedError();
+  }
+
+  @override
+  Future setLastAccessed(DateTime time) {
+    // TODO: implement setLastAccessed
+    throw UnimplementedError();
+  }
+
+  @override
+  void setLastAccessedSync(DateTime time) {
+    // TODO: implement setLastAccessedSync
+  }
+
+  @override
+  Future setLastModified(DateTime time) {
+    // TODO: implement setLastModified
+    throw UnimplementedError();
+  }
+
+  @override
+  void setLastModifiedSync(DateTime time) {
+    // TODO: implement setLastModifiedSync
+  }
+
+  @override
+  Future<File> writeAsBytes(List<int> bytes, {FileMode mode = FileMode.write, bool flush = false}) {
+    // TODO: implement writeAsBytes
+    throw UnimplementedError();
+  }
+
+  @override
+  void writeAsBytesSync(List<int> bytes, {FileMode mode = FileMode.write, bool flush = false}) {
+    // TODO: implement writeAsBytesSync
+  }
+
+  @override
+  Future<File> writeAsString(String contents, {FileMode mode = FileMode.write, Encoding encoding = utf8, bool flush = false}) {
+    // TODO: implement writeAsString
+    throw UnimplementedError();
+  }
+
+  @override
+  void writeAsStringSync(String contents, {FileMode mode = FileMode.write, Encoding encoding = utf8, bool flush = false}) {
+    // TODO: implement writeAsStringSync
+  }
+
+  @override
+  // TODO: implement absolute
+  File get absolute => throw UnimplementedError();
+  
+}

lib/models/model.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/services.dart';
 import 'package:flutter_easyloading/flutter_easyloading.dart';
 import 'package:flutter_hbb/models/chat_model.dart';
+import 'package:flutter_hbb/models/file_model.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'dart:math';
 import 'dart:convert';
@@ -98,20 +99,22 @@ class FfiModel with ChangeNotifier {
     _inputBlocked = false;
     _permissions.clear();
   }
-  void update(String id,
+
+  void update(
+      String id,
       BuildContext context,
       void Function(
     Map<String, dynamic> evt,
     String id,
   )
-      handleMsgbox) {
+          handleMsgBox) {
     var pos;
     for (;;) {
       var evt = FFI.popEvent();
       if (evt == null) break;
       var name = evt['name'];
       if (name == 'msgbox') {
-        handleMsgbox(evt, id);
+        handleMsgBox(evt, id);
       } else if (name == 'peer_info') {
         handlePeerInfo(evt, context);
       } else if (name == 'connection_ready') {
@@ -129,9 +132,10 @@ class FfiModel with ChangeNotifier {
         Clipboard.setData(ClipboardData(text: evt['content']));
       } else if (name == 'permission') {
         FFI.ffiModel.updatePermission(evt);
-      } else if (name == 'chat'){
+      } else if (name == 'chat') {
-        // FFI.setByName("chat",msg);
+        FFI.chatModel.receive(evt['text'] ?? "");
-        FFI.chatModel.receive(evt['text']??"");
+      } else if (name == 'file_dir') {
+        FFI.remoteFileModel.tryUpdateRemoteDir(evt['value'] ?? "");
       }
     }
     if (pos != null) FFI.cursorModel.updateCursorPosition(pos);
@@ -213,9 +217,7 @@ class ImageModel with ChangeNotifier {
       if (isDesktop) {
         FFI.canvasModel.updateViewStyle();
       } else {
-        final size = MediaQueryData
+        final size = MediaQueryData.fromWindow(ui.window).size;
-            .fromWindow(ui.window)
-            .size;
         final xscale = size.width / image.width;
         final yscale = size.height / image.height;
         FFI.canvasModel.scale = max(xscale, yscale);
@@ -228,9 +230,7 @@ class ImageModel with ChangeNotifier {
 
   double get maxScale {
     if (_image == null) return 1.0;
-    final size = MediaQueryData
+    final size = MediaQueryData.fromWindow(ui.window).size;
-        .fromWindow(ui.window)
-        .size;
     final xscale = size.width / _image!.width;
     final yscale = size.height / _image!.height;
     return max(1.0, max(xscale, yscale));
@@ -238,9 +238,7 @@ class ImageModel with ChangeNotifier {
 
   double get minScale {
     if (_image == null) return 1.0;
-    final size = MediaQueryData
+    final size = MediaQueryData.fromWindow(ui.window).size;
-        .fromWindow(ui.window)
-        .size;
     final xscale = size.width / _image!.width;
     final yscale = size.height / _image!.height;
     return min(xscale, yscale);
@@ -262,9 +260,7 @@ class CanvasModel with ChangeNotifier {
 
   void updateViewStyle() {
     final s = FFI.getByName('peer_option', 'view-style');
-    final size = MediaQueryData
+    final size = MediaQueryData.fromWindow(ui.window).size;
-        .fromWindow(ui.window)
-        .size;
     final s1 = size.width / FFI.ffiModel.display.width;
     final s2 = size.height / FFI.ffiModel.display.height;
     if (s == 'shrink') {
@@ -293,9 +289,7 @@ class CanvasModel with ChangeNotifier {
   }
 
   void moveDesktopMouse(double x, double y) {
-    final size = MediaQueryData
+    final size = MediaQueryData.fromWindow(ui.window).size;
-        .fromWindow(ui.window)
-        .size;
     final dw = FFI.ffiModel.display.width * _scale;
     final dh = FFI.ffiModel.display.height * _scale;
     var dxOffset = 0;
@@ -390,9 +384,7 @@ class CursorModel with ChangeNotifier {
 
   // remote physical display coordinate
   Rect getVisibleRect() {
-    final size = MediaQueryData
+    final size = MediaQueryData.fromWindow(ui.window).size;
-        .fromWindow(ui.window)
-        .size;
     final xoffset = FFI.canvasModel.x;
     final yoffset = FFI.canvasModel.y;
     final scale = FFI.canvasModel.scale;
@@ -418,7 +410,7 @@ class CursorModel with ChangeNotifier {
     FFI.tap(button);
   }
 
-  void move(double x, double y){
+  void move(double x, double y) {
     moveLocal(x, y);
     FFI.moveMouse(_x, _y);
   }
@@ -440,7 +432,7 @@ class CursorModel with ChangeNotifier {
     notifyListeners();
   }
 
-  void updatePan(double dx, double dy,bool touchMode) {
+  void updatePan(double dx, double dy, bool touchMode) {
     if (FFI.imageModel.image == null) return;
     if (touchMode) {
       if (true) {
@@ -567,8 +559,8 @@ class CursorModel with ChangeNotifier {
     notifyListeners();
   }
 
-  void updateDisplayOriginWithCursor(double x, double y, double xCursor,
+  void updateDisplayOriginWithCursor(
-      double yCursor) {
+      double x, double y, double xCursor, double yCursor) {
     _displayOriginX = x;
     _displayOriginY = y;
     _x = xCursor;
@@ -675,13 +667,9 @@ class ServerModel with ChangeNotifier {
   }
 }
 
-enum MouseButtons {
+enum MouseButtons { left, right, wheel }
-  left,
-  right,
-  wheel
-}
 
-extension ToString on MouseButtons{
+extension ToString on MouseButtons {
   String get value {
     switch (this) {
       case MouseButtons.left:
@@ -694,7 +682,6 @@ extension ToString on MouseButtons{
   }
 }
 
-
 class FFI {
   static var id = "";
   static var shift = false;
@@ -708,6 +695,7 @@ class FFI {
   static final canvasModel = CanvasModel();
   static final serverModel = ServerModel();
   static final chatModel = ChatModel();
+  static final remoteFileModel = RemoteFileModel();
 
   static String getId() {
     return getByName('remote_id');
@@ -744,8 +732,8 @@ class FFI {
 
   static void sendMouse(String type, MouseButtons button) {
     if (!ffiModel.keyboard()) return;
-    setByName(
+    setByName('send_mouse',
-        'send_mouse', json.encode(modify({'type': type, 'buttons': button.value})));
+        json.encode(modify({'type': type, 'buttons': button.value})));
   }
 
   static void inputKey(String name) {
@@ -775,8 +763,12 @@ class FFI {
     return [];
   }
 
-  static void connect(String id) {
+  static void connect(String id, {bool isFileTransfer = false}) {
+    if (isFileTransfer) {
+      setByName('connect_file_transfer', id);
+    } else {
       setByName('connect', id);
+    }
     FFI.id = id;
   }
 
@@ -804,14 +796,8 @@ class FFI {
   static void close() {
     chatModel.release();
     if (FFI.imageModel.image != null && !isDesktop) {
-      savePreference(
+      savePreference(id, cursorModel.x, cursorModel.y, canvasModel.x,
-          id,
+          canvasModel.y, canvasModel.scale, ffiModel.pi.currentDisplay);
-          cursorModel.x,
-          cursorModel.y,
-          canvasModel.x,
-          canvasModel.y,
-          canvasModel.scale,
-          ffiModel.pi.currentDisplay);
     }
     id = "";
     setByName('close', '');

lib/pages/connection_page.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_hbb/pages/chat_page.dart';
 import 'package:flutter_hbb/pages/file_manager_page.dart';
 import 'package:provider/provider.dart';
 import 'package:url_launcher/url_launcher.dart';
@@ -55,21 +54,11 @@ class _ConnectionPageState extends State<ConnectionPage> {
             getSearchBarUI(),
             Container(height: 12),
             getPeers(),
-            ElevatedButton(
+            // ElevatedButton(
-                onPressed: () {
+            //     onPressed: () {
-                  Navigator.push(
+            //       toggleChatOverlay();
-                    context,
+            //     },
-                    MaterialPageRoute(
+            //     child: Text("Chat Debug"))
-                      builder: (BuildContext context) => FileManagerPage(),
-                    ),
-                  );
-                },
-                child: Text("File")),
-            ElevatedButton(
-                onPressed: () {
-                  toggleChatOverlay();
-                },
-                child: Text("Chat"))
           ]),
     );
   }
@@ -79,15 +68,24 @@ class _ConnectionPageState extends State<ConnectionPage> {
     connect(id);
   }
 
-  void connect(String id) {
+  void connect(String id,{bool isFileTransfer = false}) {
     if (id == '') return;
     id = id.replaceAll(' ', '');
+    if (isFileTransfer) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (BuildContext context) => FileManagerPage(id: id),
+        ),
+      );
+    }else{
       Navigator.push(
         context,
         MaterialPageRoute(
           builder: (BuildContext context) => RemotePage(id: id),
         ),
       );
+    }
     FocusScopeNode currentFocus = FocusScope.of(context);
     if (!currentFocus.hasPrimaryFocus) {
       currentFocus.unfocus();
@@ -262,6 +260,8 @@ class _ConnectionPageState extends State<ConnectionPage> {
       items: [
         PopupMenuItem<String>(
             child: Text(translate('Remove')), value: 'remove'),
+        PopupMenuItem<String>(
+            child: Text(translate('File transfer')), value: 'file'),
       ],
       elevation: 8,
     );
@@ -270,6 +270,8 @@ class _ConnectionPageState extends State<ConnectionPage> {
       () async {
         removePreference(id);
       }();
+    }else if (value == 'file') {
+      connect(id,isFileTransfer: true);
     }
   }
 }

lib/pages/file_manager_page.dart

@@ -1,29 +1,94 @@
-import 'dart:io';
+import 'dart:async';
 import 'package:file_manager/file_manager.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_easyloading/flutter_easyloading.dart';
+import 'package:flutter_hbb/models/file_model.dart';
+import 'package:provider/provider.dart';
 
-final FileManagerController controller = FileManagerController();
+import '../common.dart';
+import '../models/model.dart';
+import '../widgets/dialog.dart';
+
+class FileManagerPage extends StatefulWidget {
+  FileManagerPage({Key? key, required this.id}) : super(key: key);
+  final String id;
+
+  @override
+  State<StatefulWidget> createState() => _FileManagerPageState();
+}
+
+class _FileManagerPageState extends State<FileManagerPage> {
+  final _localFileModel = FileManagerController();
+  final _remoteFileModel = FFI.remoteFileModel;
+  Timer? _interval;
+  Timer? _timer;
+  var _reconnects = 1;
+  var _isLocal = false;
+
+  @override
+  void initState() {
+    super.initState();
+    showLoading(translate('Connecting...'));
+    FFI.connect(widget.id, isFileTransfer: true);
+    _interval = Timer.periodic(Duration(milliseconds: 30),
+        (timer) => FFI.ffiModel.update(widget.id, context, handleMsgBox));
+  }
+
+  @override
+  void dispose() {
+    _localFileModel.dispose();
+    _remoteFileModel.dispose();
+    _interval?.cancel();
+    FFI.close();
+    EasyLoading.dismiss();
+    super.dispose();
+  }
 
-class FileManagerPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
+    return ChangeNotifierProvider.value(
-        body: FileManager(
+        value: _remoteFileModel,
-      controller: controller,
+        child: Scaffold(
-      builder: (context, snapshot) {
+          appBar: AppBar(
-        final List<FileSystemEntity> entities = snapshot;
+            leading: Row(children: [
+              IconButton(icon: Icon(Icons.arrow_back), onPressed: goBack),
+              IconButton(icon: Icon(Icons.close), onPressed: clientClose),
+            ]),
+            leadingWidth: 200,
+            centerTitle: true,
+            title: Text(translate(_isLocal ? "Local" : "Remote")),
+            actions: [
+              IconButton(
+                  icon: Icon(Icons.change_circle),
+                  onPressed: () => setState(() {
+                        _isLocal = !_isLocal;
+                      })),
+            ],
+          ),
+          body:
+              Consumer<RemoteFileModel>(builder: (context, remoteModel, child) {
+            return FileManager(
+                controller: _localFileModel,
+                builder: (context, localSnapshot) {
+                  final snapshot = _isLocal
+                      ? localSnapshot
+                      : remoteModel.currentRemoteDir.entries;
                   return ListView.builder(
-          itemCount: entities.length,
+                    itemCount: snapshot.length,
                     itemBuilder: (context, index) {
                       return Card(
                         child: ListTile(
-                leading: FileManager.isFile(entities[index])
+                          leading: FileManager.isFile(snapshot[index])
                               ? Icon(Icons.feed_outlined)
                               : Icon(Icons.folder),
-                title: Text(FileManager.basename(entities[index])),
+                          title: Text(FileManager.basename(snapshot[index])),
                           onTap: () {
-                  if (FileManager.isDirectory(entities[index])) {
+                            if (FileManager.isDirectory(snapshot[index])) {
-                    controller.openDirectory(entities[index]); // open directory
+                              _isLocal
+                                  ? _localFileModel
+                                      .openDirectory(snapshot[index])
+                                  : readRemoteDir(
+                                      snapshot[index].path); // open directory
                             } else {
                               // Perform file-related tasks.
                             }
@@ -32,7 +97,49 @@ class FileManagerPage extends StatelessWidget {
                       );
                     },
                   );
-      },
+                });
+          }),
         ));
   }
+
+  goBack() {
+    if (_isLocal) {
+      _localFileModel.goToParentDirectory();
+    } else {
+      _remoteFileModel.goToParentDirectory();
+    }
+  }
+
+  void readRemoteDir(String path) {
+    FFI.setByName("read_remote_dir", path);
+  }
+
+  void handleMsgBox(Map<String, dynamic> evt, String id) {
+    var type = evt['type'];
+    var title = evt['title'];
+    var text = evt['text'];
+    if (type == 're-input-password') {
+      wrongPasswordDialog(id);
+    } else if (type == 'input-password') {
+      enterPasswordDialog(id);
+    } else {
+      var hasRetry = evt['hasRetry'] == 'true';
+      print(evt);
+      showMsgBox(type, title, text, hasRetry);
+    }
+  }
+
+  void showMsgBox(String type, String title, String text, bool hasRetry) {
+    msgBox(type, title, text);
+    if (hasRetry) {
+      _timer?.cancel();
+      _timer = Timer(Duration(seconds: _reconnects), () {
+        FFI.reconnect();
+        showLoading(translate('Connecting...'));
+      });
+      _reconnects *= 2;
+    } else {
+      _reconnects = 1;
+    }
+  }
 }

lib/pages/remote_page.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_easyloading/flutter_easyloading.dart';
-import 'package:flutter_hbb/main.dart';
 import 'package:flutter_hbb/widgets/gesture_help.dart';
 import 'package:provider/provider.dart';
 import 'package:flutter/services.dart';
@@ -11,6 +10,7 @@ import 'package:wakelock/wakelock.dart';
 import '../common.dart';
 import '../gestures.dart';
 import '../models/model.dart';
+import '../widgets/dialog.dart';
 import 'chat_page.dart';
 
 final initText = '\1' * 1024;
@@ -228,7 +228,7 @@ class _RemotePageState extends State<RemotePage> {
     final showActionButton = !_showBar || hideKeyboard;
     return WillPopScope(
       onWillPop: () async {
-        close();
+        clientClose();
         return false;
       },
       child: Scaffold(
@@ -279,7 +279,7 @@ class _RemotePageState extends State<RemotePage> {
                       color: Colors.white,
                       icon: Icon(Icons.clear),
                       onPressed: () {
-                        close();
+                        clientClose();
                       },
                     )
                   ] +
@@ -585,10 +585,6 @@ class _RemotePageState extends State<RemotePage> {
             }));
   }
 
-  void close() {
-    msgBox('', 'Close', 'Are you sure to close the connection?');
-  }
-
   Widget getHelpTools() {
     final keyboard = isKeyboardShown();
     if (!keyboard) {
@@ -783,74 +779,7 @@ class ImagePainter extends CustomPainter {
   }
 }
 
-void enterPasswordDialog(String id) {
-  final controller = TextEditingController();
-  var remember = FFI.getByName('remember', id) == 'true';
-  if (globalKey.currentContext == null) return;
-  showAlertDialog((setState) => Tuple3(
-        Text(translate('Password Required')),
-        Column(mainAxisSize: MainAxisSize.min, children: [
-          PasswordWidget(controller: controller),
-          CheckboxListTile(
-            contentPadding: const EdgeInsets.all(0),
-            dense: true,
-            controlAffinity: ListTileControlAffinity.leading,
-            title: Text(
-              translate('Remember password'),
-            ),
-            value: remember,
-            onChanged: (v) {
-              if (v != null) {
-                setState(() => remember = v);
-              }
-            },
-          ),
-        ]),
-        [
-          TextButton(
-            style: flatButtonStyle,
-            onPressed: () {
-              DialogManager.reset();
-              Navigator.pop(globalKey.currentContext!);
-            },
-            child: Text(translate('Cancel')),
-          ),
-          TextButton(
-            style: flatButtonStyle,
-            onPressed: () {
-              var text = controller.text.trim();
-              if (text == '') return;
-              FFI.login(text, remember);
-              DialogManager.reset();
-              showLoading(translate('Logging in...'));
-            },
-            child: Text(translate('OK')),
-          ),
-        ],
-      ));
-}
 
-void wrongPasswordDialog(String id) {
-  if (globalKey.currentContext == null) return;
-  showAlertDialog((_) => Tuple3(Text(translate('Wrong Password')),
-          Text(translate('Do you want to enter again?')), [
-        TextButton(
-          style: flatButtonStyle,
-          onPressed: () {
-            DialogManager.reset();
-            Navigator.pop(globalKey.currentContext!);
-          },
-          child: Text(translate('Cancel')),
-        ),
-        TextButton(
-          style: flatButtonStyle,
-          onPressed: () {
-            enterPasswordDialog(id);
-          },
-          child: Text(translate('Retry')),
-        ),
-      ]));
-}
 
 CheckboxListTile getToggle(
     void Function(void Function()) setState, option, name) {

lib/widgets/dialog.dart

@@ -0,0 +1,77 @@
+import 'package:flutter/material.dart';
+import 'package:tuple/tuple.dart';
+import '../common.dart';
+import '../models/model.dart';
+
+void clientClose() {
+  msgBox('', 'Close', 'Are you sure to close the connection?');
+}
+
+void enterPasswordDialog(String id) {
+  final controller = TextEditingController();
+  var remember = FFI.getByName('remember', id) == 'true';
+  if (globalKey.currentContext == null) return;
+  showAlertDialog((setState) => Tuple3(
+    Text(translate('Password Required')),
+    Column(mainAxisSize: MainAxisSize.min, children: [
+      PasswordWidget(controller: controller),
+      CheckboxListTile(
+        contentPadding: const EdgeInsets.all(0),
+        dense: true,
+        controlAffinity: ListTileControlAffinity.leading,
+        title: Text(
+          translate('Remember password'),
+        ),
+        value: remember,
+        onChanged: (v) {
+          if (v != null) {
+            setState(() => remember = v);
+          }
+        },
+      ),
+    ]),
+    [
+      TextButton(
+        style: flatButtonStyle,
+        onPressed: () {
+          DialogManager.reset();
+          Navigator.pop(globalKey.currentContext!);
+        },
+        child: Text(translate('Cancel')),
+      ),
+      TextButton(
+        style: flatButtonStyle,
+        onPressed: () {
+          var text = controller.text.trim();
+          if (text == '') return;
+          FFI.login(text, remember);
+          DialogManager.reset();
+          showLoading(translate('Logging in...'));
+        },
+        child: Text(translate('OK')),
+      ),
+    ],
+  ));
+}
+
+void wrongPasswordDialog(String id) {
+  if (globalKey.currentContext == null) return;
+  showAlertDialog((_) => Tuple3(Text(translate('Wrong Password')),
+      Text(translate('Do you want to enter again?')), [
+        TextButton(
+          style: flatButtonStyle,
+          onPressed: () {
+            DialogManager.reset();
+            Navigator.pop(globalKey.currentContext!);
+          },
+          child: Text(translate('Cancel')),
+        ),
+        TextButton(
+          style: flatButtonStyle,
+          onPressed: () {
+            enterPasswordDialog(id);
+          },
+          child: Text(translate('Retry')),
+        ),
+      ]));
+}