rustdesk/lib/model.dart

987 lines
25 KiB
Dart

import 'package:flutter/services.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'dart:math';
import 'dart:convert';
import 'dart:typed_data';
import 'dart:ui' as ui;
import 'package:flutter/material.dart';
import 'package:tuple/tuple.dart';
import 'dart:async';
import 'common.dart';
import 'native_model.dart' if (dart.library.html) 'web_model.dart';
class FfiModel with ChangeNotifier {
PeerInfo _pi = PeerInfo();
Display _display = Display();
var _decoding = false;
bool _waitForImage = false;
bool _initialized = false;
var _inputBlocked = false;
final _permissions = Map<String, bool>();
bool? _secure;
bool? _direct;
get permissions => _permissions;
get initialized => _initialized;
get display => _display;
get secure => _secure;
get direct => _direct;
get pi => _pi;
get inputBlocked => _inputBlocked;
set inputBlocked(v) {
_inputBlocked = v;
}
FfiModel() {
Translator.call = translate;
clear();
() async {
await PlatformFFI.init();
_initialized = true;
print("FFI initialized");
notifyListeners();
}();
}
void updatePermission(Map<String, dynamic> evt) {
evt.forEach((k, v) {
if (k == 'name') return;
_permissions[k] = v == 'true';
});
print('$_permissions');
notifyListeners();
}
bool keyboard() => _permissions['keyboard'] != false;
void clear() {
_pi = PeerInfo();
_display = Display();
_waitForImage = false;
_secure = null;
_direct = null;
_inputBlocked = false;
clearPermissions();
}
void setConnectionType(bool secure, bool direct) {
_secure = secure;
_direct = direct;
}
Image? getConnectionImage() {
String? icon;
if (secure == true && direct == true) {
icon = 'secure';
} else if (secure == false && direct == true) {
icon = 'insecure';
} else if (secure == false && direct == false) {
icon = 'insecure_relay';
} else if (secure == true && direct == false) {
icon = 'secure_relay';
}
return icon == null
? null
: Image.asset('assets/$icon.png', width: 48, height: 48);
}
void clearPermissions() {
_inputBlocked = false;
_permissions.clear();
}
void update(String id,
BuildContext context,
void Function(
Map<String, dynamic> evt,
String id,
)
handleMsgbox) {
var pos;
for (;;) {
var evt = FFI.popEvent();
if (evt == null) break;
var name = evt['name'];
if (name == 'msgbox') {
handleMsgbox(evt, id);
} else if (name == 'peer_info') {
handlePeerInfo(evt, context);
} else if (name == 'connection_ready') {
FFI.ffiModel.setConnectionType(
evt['secure'] == 'true', evt['direct'] == 'true');
} else if (name == 'switch_display') {
handleSwitchDisplay(evt);
} else if (name == 'cursor_data') {
FFI.cursorModel.updateCursorData(evt);
} else if (name == 'cursor_id') {
FFI.cursorModel.updateCursorId(evt);
} else if (name == 'cursor_position') {
pos = evt;
} else if (name == 'clipboard') {
Clipboard.setData(ClipboardData(text: evt['content']));
} else if (name == 'permission') {
FFI.ffiModel.updatePermission(evt);
}
}
if (pos != null) FFI.cursorModel.updateCursorPosition(pos);
if (!_decoding) {
var rgba = PlatformFFI.getRgba();
if (rgba != null) {
if (_waitForImage) {
_waitForImage = false;
dismissLoading();
}
_decoding = true;
final pid = FFI.id;
ui.decodeImageFromPixels(
rgba, _display.width, _display.height, ui.PixelFormat.bgra8888,
(image) {
PlatformFFI.clearRgbaFrame();
_decoding = false;
if (FFI.id != pid) return;
try {
// my throw exception, because the listener maybe already dispose
FFI.imageModel.update(image);
} catch (e) {
print('update image: $e');
}
});
}
}
}
void handleSwitchDisplay(Map<String, dynamic> evt) {
var old = _pi.currentDisplay;
_pi.currentDisplay = int.parse(evt['display']);
_display.x = double.parse(evt['x']);
_display.y = double.parse(evt['y']);
_display.width = int.parse(evt['width']);
_display.height = int.parse(evt['height']);
if (old != _pi.currentDisplay)
FFI.cursorModel.updateDisplayOrigin(_display.x, _display.y);
notifyListeners();
}
void handlePeerInfo(Map<String, dynamic> evt, BuildContext context) {
dismissLoading();
_pi.version = evt['version'];
_pi.username = evt['username'];
_pi.hostname = evt['hostname'];
_pi.platform = evt['platform'];
_pi.sasEnabled = evt['sas_enabled'] == "true";
_pi.currentDisplay = int.parse(evt['current_display']);
List<dynamic> displays = json.decode(evt['displays']);
_pi.displays = [];
for (int i = 0; i < displays.length; ++i) {
Map<String, dynamic> d0 = displays[i];
var d = Display();
d.x = d0['x'].toDouble();
d.y = d0['y'].toDouble();
d.width = d0['width'];
d.height = d0['height'];
_pi.displays.add(d);
}
if (_pi.currentDisplay < _pi.displays.length) {
_display = _pi.displays[_pi.currentDisplay];
}
if (displays.length > 0) {
showLoading(translate('Connected, waiting for image...'), context);
_waitForImage = true;
}
notifyListeners();
}
}
class ImageModel with ChangeNotifier {
ui.Image? _image;
ui.Image? get image => _image;
void update(ui.Image? image) {
if (_image == null && image != null) {
if (isDesktop) {
FFI.canvasModel.updateViewStyle();
} else {
final size = MediaQueryData
.fromWindow(ui.window)
.size;
final xscale = size.width / image.width;
final yscale = size.height / image.height;
FFI.canvasModel.scale = max(xscale, yscale);
}
initializeCursorAndCanvas();
}
_image = image;
if (image != null) notifyListeners();
}
double get maxScale {
if (_image == null) return 1.0;
final size = MediaQueryData
.fromWindow(ui.window)
.size;
final xscale = size.width / _image!.width;
final yscale = size.height / _image!.height;
return max(1.0, max(xscale, yscale));
}
double get minScale {
if (_image == null) return 1.0;
final size = MediaQueryData
.fromWindow(ui.window)
.size;
final xscale = size.width / _image!.width;
final yscale = size.height / _image!.height;
return min(xscale, yscale);
}
}
class CanvasModel with ChangeNotifier {
double _x = 0;
double _y = 0;
double _scale = 1.0;
CanvasModel();
double get x => _x;
double get y => _y;
double get scale => _scale;
void updateViewStyle() {
final s = FFI.getByName('peer_option', 'view-style');
final size = MediaQueryData
.fromWindow(ui.window)
.size;
final s1 = size.width / FFI.ffiModel.display.width;
final s2 = size.height / FFI.ffiModel.display.height;
if (s == 'shrink') {
final s = s1 < s2 ? s1 : s2;
if (s < 1) {
_scale = s;
}
} else if (s == 'stretch') {
final s = s1 > s2 ? s1 : s2;
if (s > 1) {
_scale = s;
}
} else {
_scale = 1;
}
_x = (size.width - FFI.ffiModel.display.width * _scale) / 2;
_y = (size.height - FFI.ffiModel.display.height * _scale) / 2;
notifyListeners();
}
void update(double x, double y, double scale) {
_x = x;
_y = y;
_scale = scale;
notifyListeners();
}
void moveDesktopMouse(double x, double y) {
final size = MediaQueryData
.fromWindow(ui.window)
.size;
final dw = FFI.ffiModel.display.width * _scale;
final dh = FFI.ffiModel.display.height * _scale;
var dxOffset = 0;
var dyOffset = 0;
if (dw > size.width) {
dxOffset = (x - dw * (x / size.width) - _x).toInt();
}
if (dh > size.height) {
dyOffset = (y - dh * (y / size.height) - _y).toInt();
}
_x += dxOffset;
_y += dyOffset;
if (dxOffset != 0 || dyOffset != 0) {
notifyListeners();
}
FFI.cursorModel.moveLocal(x, y);
}
set scale(v) {
_scale = v;
notifyListeners();
}
void panX(double dx) {
_x += dx;
notifyListeners();
}
void resetOffset() {
if (isDesktop) {
updateViewStyle();
} else {
_x = 0;
_y = 0;
}
notifyListeners();
}
void panY(double dy) {
_y += dy;
notifyListeners();
}
void updateScale(double v) {
if (FFI.imageModel.image == null) return;
final offset = FFI.cursorModel.offset;
var r = FFI.cursorModel.getVisibleRect();
final px0 = (offset.dx - r.left) * _scale;
final py0 = (offset.dy - r.top) * _scale;
_scale *= v;
final maxs = FFI.imageModel.maxScale;
final mins = FFI.imageModel.minScale;
if (_scale > maxs) _scale = maxs;
if (_scale < mins) _scale = mins;
r = FFI.cursorModel.getVisibleRect();
final px1 = (offset.dx - r.left) * _scale;
final py1 = (offset.dy - r.top) * _scale;
_x -= px1 - px0;
_y -= py1 - py0;
notifyListeners();
}
void clear([bool notify = false]) {
_x = 0;
_y = 0;
_scale = 1.0;
if (notify) notifyListeners();
}
}
class CursorModel with ChangeNotifier {
ui.Image? _image;
final _images = Map<int, Tuple3<ui.Image, double, double>>();
double _x = -10000;
double _y = -10000;
double _hotx = 0;
double _hoty = 0;
double _displayOriginX = 0;
double _displayOriginY = 0;
ui.Image? get image => _image;
double get x => _x - _displayOriginX;
double get y => _y - _displayOriginY;
Offset get offset => Offset(_x, _y);
double get hotx => _hotx;
double get hoty => _hoty;
// remote physical display coordinate
Rect getVisibleRect() {
final size = MediaQueryData
.fromWindow(ui.window)
.size;
final xoffset = FFI.canvasModel.x;
final yoffset = FFI.canvasModel.y;
final scale = FFI.canvasModel.scale;
final x0 = _displayOriginX - xoffset / scale;
final y0 = _displayOriginY - yoffset / scale;
return Rect.fromLTWH(x0, y0, size.width / scale, size.height / scale);
}
double adjustForKeyboard() {
final m = MediaQueryData.fromWindow(ui.window);
var keyboardHeight = m.viewInsets.bottom;
final size = m.size;
if (keyboardHeight < 100) return 0;
final s = FFI.canvasModel.scale;
final thresh = (size.height - keyboardHeight) / 2;
var h = (_y - getVisibleRect().top) * s; // local physical display height
return h - thresh;
}
void touch(double x, double y, MouseButtons button) {
moveLocal(x, y);
FFI.moveMouse(_x, _y);
FFI.tap(button);
}
void move(double x, double y){
moveLocal(x, y);
FFI.moveMouse(_x, _y);
}
void moveLocal(double x, double y) {
final scale = FFI.canvasModel.scale;
final xoffset = FFI.canvasModel.x;
final yoffset = FFI.canvasModel.y;
_x = (x - xoffset) / scale + _displayOriginX;
_y = (y - yoffset) / scale + _displayOriginY;
notifyListeners();
}
void reset() {
_x = _displayOriginX;
_y = _displayOriginY;
FFI.moveMouse(_x, _y);
FFI.canvasModel.clear(true);
notifyListeners();
}
void updatePan(double dx, double dy,bool touchMode) {
if (FFI.imageModel.image == null) return;
if (touchMode) {
if (true) {
final scale = FFI.canvasModel.scale;
_x += dx / scale;
_y += dy / scale;
FFI.moveMouse(_x, _y);
notifyListeners();
} else {
FFI.canvasModel.panX(dx);
FFI.canvasModel.panY(dy);
}
return;
}
final scale = FFI.canvasModel.scale;
dx /= scale;
dy /= scale;
final r = getVisibleRect();
var cx = r.center.dx;
var cy = r.center.dy;
var tryMoveCanvasX = false;
if (dx > 0) {
final maxCanvasCanMove =
_displayOriginX + FFI.imageModel.image!.width - r.right;
tryMoveCanvasX = _x + dx > cx && maxCanvasCanMove > 0;
if (tryMoveCanvasX) {
dx = min(dx, maxCanvasCanMove);
} else {
final maxCursorCanMove = r.right - _x;
dx = min(dx, maxCursorCanMove);
}
} else if (dx < 0) {
final maxCanvasCanMove = _displayOriginX - r.left;
tryMoveCanvasX = _x + dx < cx && maxCanvasCanMove < 0;
if (tryMoveCanvasX) {
dx = max(dx, maxCanvasCanMove);
} else {
final maxCursorCanMove = r.left - _x;
dx = max(dx, maxCursorCanMove);
}
}
var tryMoveCanvasY = false;
if (dy > 0) {
final mayCanvasCanMove =
_displayOriginY + FFI.imageModel.image!.height - r.bottom;
tryMoveCanvasY = _y + dy > cy && mayCanvasCanMove > 0;
if (tryMoveCanvasY) {
dy = min(dy, mayCanvasCanMove);
} else {
final mayCursorCanMove = r.bottom - _y;
dy = min(dy, mayCursorCanMove);
}
} else if (dy < 0) {
final mayCanvasCanMove = _displayOriginY - r.top;
tryMoveCanvasY = _y + dy < cy && mayCanvasCanMove < 0;
if (tryMoveCanvasY) {
dy = max(dy, mayCanvasCanMove);
} else {
final mayCursorCanMove = r.top - _y;
dy = max(dy, mayCursorCanMove);
}
}
if (dx == 0 && dy == 0) return;
_x += dx;
_y += dy;
if (tryMoveCanvasX && dx != 0) {
FFI.canvasModel.panX(-dx);
}
if (tryMoveCanvasY && dy != 0) {
FFI.canvasModel.panY(-dy);
}
FFI.moveMouse(_x, _y);
notifyListeners();
}
void updateCursorData(Map<String, dynamic> evt) {
var id = int.parse(evt['id']);
_hotx = double.parse(evt['hotx']);
_hoty = double.parse(evt['hoty']);
var width = int.parse(evt['width']);
var height = int.parse(evt['height']);
List<dynamic> colors = json.decode(evt['colors']);
final rgba = Uint8List.fromList(colors.map((s) => s as int).toList());
var pid = FFI.id;
ui.decodeImageFromPixels(rgba, width, height, ui.PixelFormat.rgba8888,
(image) {
if (FFI.id != pid) return;
_image = image;
_images[id] = Tuple3(image, _hotx, _hoty);
try {
// my throw exception, because the listener maybe already dispose
notifyListeners();
} catch (e) {
print('notify cursor: $e');
}
});
}
void updateCursorId(Map<String, dynamic> evt) {
final tmp = _images[int.parse(evt['id'])];
if (tmp != null) {
_image = tmp.item1;
_hotx = tmp.item2;
_hoty = tmp.item3;
notifyListeners();
}
}
void updateCursorPosition(Map<String, dynamic> evt) {
_x = double.parse(evt['x']);
_y = double.parse(evt['y']);
notifyListeners();
}
void updateDisplayOrigin(double x, double y) {
_displayOriginX = x;
_displayOriginY = y;
_x = x + 1;
_y = y + 1;
FFI.moveMouse(x, y);
FFI.canvasModel.resetOffset();
notifyListeners();
}
void updateDisplayOriginWithCursor(double x, double y, double xCursor,
double yCursor) {
_displayOriginX = x;
_displayOriginY = y;
_x = xCursor;
_y = yCursor;
FFI.moveMouse(x, y);
notifyListeners();
}
void clear() {
_x = -10000;
_x = -10000;
_image = null;
_images.clear();
}
}
class ClientState {
bool isStart = false;
bool isFileTransfer = false;
String name = "";
String peerId = "";
ClientState(this.isStart, this.isFileTransfer, this.name, this.peerId);
ClientState.fromJson(Map<String, dynamic> json) {
isStart = json['is_start'];
isFileTransfer = json['is_file_transfer'];
name = json['name'];
peerId = json['peer_id'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['is_start'] = this.isStart;
data['is_file_transfer'] = this.isFileTransfer;
data['name'] = this.name;
data['peer_id'] = this.peerId;
return data;
}
}
class ServerModel with ChangeNotifier {
bool _mediaOk = false;
bool _inputOk = false;
bool _isPeerStart = false;
bool _isFileTransfer = false;
String _peerName = "";
String _peerID = "";
bool get mediaOk => _mediaOk;
bool get inputOk => _inputOk;
bool get isPeerStart => _isPeerStart;
bool get isFileTransfer => _isFileTransfer;
String get peerName => _peerName;
String get peerID => _peerID;
ServerModel();
changeStatue(String name, bool value) {
switch (name) {
case "media":
_mediaOk = value;
break;
case "input":
_inputOk = value;
break;
default:
return;
}
notifyListeners();
}
setPeer(bool enabled, {String name = "", String id = ""}) {
_isPeerStart = enabled;
if (name != "") _peerName = name;
if (id != "") _peerID = id;
notifyListeners();
}
updateClientState() {
var res = FFI.getByName("client_state");
debugPrint("getByName client_state string:$res");
try {
var clientState = ClientState.fromJson(jsonDecode(res));
_isPeerStart = clientState.isStart;
_isFileTransfer = clientState.isFileTransfer;
_peerName = clientState.name;
_peerID = clientState.peerId;
debugPrint("updateClientState:${clientState.toJson()}");
} catch (e) {}
notifyListeners();
}
clearPeer() {
_isPeerStart = false;
_peerName = "";
_peerID = "";
notifyListeners();
}
}
enum MouseButtons {
left,
right,
wheel
}
extension ToString on MouseButtons{
String get value {
switch (this) {
case MouseButtons.left:
return "left";
case MouseButtons.right:
return "right";
case MouseButtons.wheel:
return "wheel";
}
}
}
class FFI {
static String id = "";
static var shift = false;
static var ctrl = false;
static var alt = false;
static var command = false;
static final imageModel = ImageModel();
static final ffiModel = FfiModel();
static final cursorModel = CursorModel();
static final canvasModel = CanvasModel();
static final serverModel = ServerModel();
static String getId() {
return getByName('remote_id');
}
static void tap(MouseButtons button) {
sendMouse('down', button);
sendMouse('up', button);
}
static void scroll(double y) {
var y2 = y.round();
if (y2 == 0) return;
setByName('send_mouse',
json.encode(modify({'type': 'wheel', 'y': y2.toString()})));
}
static void reconnect() {
setByName('reconnect');
FFI.ffiModel.clearPermissions();
}
static void resetModifiers() {
shift = ctrl = alt = command = false;
}
static Map<String, String> modify(Map<String, String> evt) {
if (ctrl) evt['ctrl'] = 'true';
if (shift) evt['shift'] = 'true';
if (alt) evt['alt'] = 'true';
if (command) evt['command'] = 'true';
return evt;
}
static void sendMouse(String type, MouseButtons button) {
if (!ffiModel.keyboard()) return;
setByName(
'send_mouse', json.encode(modify({'type': type, 'buttons': button.value})));
}
static void inputKey(String name) {
if (!ffiModel.keyboard()) return;
setByName(
'input_key', json.encode(modify({'name': name, 'press': 'true'})));
}
static void moveMouse(double x, double y) {
if (!ffiModel.keyboard()) return;
var x2 = x.toInt();
var y2 = y.toInt();
setByName('send_mouse', json.encode(modify({'x': '$x2', 'y': '$y2'})));
}
static List<Peer> peers() {
try {
List<dynamic> peers = json.decode(getByName('peers'));
return peers
.map((s) => s as List<dynamic>)
.map((s) =>
Peer.fromJson(s[0] as String, s[1] as Map<String, dynamic>))
.toList();
} catch (e) {
print('peers(): $e');
}
return [];
}
static void connect(String id) {
setByName('connect', id);
FFI.id = id;
}
static Map<String, dynamic>? popEvent() {
var s = getByName('event');
if (s == '') return null;
try {
Map<String, dynamic> event = json.decode(s);
return event;
} catch (e) {
print('popEvent(): $e');
}
return null;
}
static void login(String password, bool remember) {
setByName(
'login',
json.encode({
'password': password,
'remember': remember ? 'true' : 'false',
}));
}
static void close() {
if (FFI.imageModel.image != null && !isDesktop) {
savePreference(
id,
cursorModel.x,
cursorModel.y,
canvasModel.x,
canvasModel.y,
canvasModel.scale,
ffiModel.pi.currentDisplay);
}
id = "";
setByName('close', '');
imageModel.update(null);
cursorModel.clear();
ffiModel.clear();
canvasModel.clear();
resetModifiers();
}
static String getByName(String name, [String arg = '']) {
return PlatformFFI.getByName(name, arg);
}
static void setByName(String name, [String value = '']) {
PlatformFFI.setByName(name, value);
}
static Future<String> getVersion() async {
return await PlatformFFI.getVersion();
}
static handleMouse(Map<String, dynamic> evt) {
var type = '';
var isMove = false;
switch (evt['type']) {
case 'mousedown':
type = 'down';
break;
case 'mouseup':
type = 'up';
break;
case 'mousemove':
isMove = true;
break;
default:
return;
}
evt['type'] = type;
var x = evt['x'];
var y = evt['y'];
if (isMove) {
FFI.canvasModel.moveDesktopMouse(x, y);
}
final d = FFI.ffiModel.display;
x -= FFI.canvasModel.x;
y -= FFI.canvasModel.y;
if (!isMove && (x < 0 || x > d.width || y < 0 || y > d.height)) {
return;
}
x /= FFI.canvasModel.scale;
y /= FFI.canvasModel.scale;
x += d.x;
y += d.y;
if (type != '') {
x = 0;
y = 0;
}
evt['x'] = '$x';
evt['y'] = '$y';
var buttons = '';
switch (evt['buttons']) {
case 1:
buttons = 'left';
break;
case 2:
buttons = 'right';
break;
case 4:
buttons = 'wheel';
break;
}
evt['buttons'] = buttons;
setByName('send_mouse', json.encode(evt));
}
static listenToMouse(bool yesOrNo) {
if (yesOrNo) {
PlatformFFI.startDesktopWebListener(handleMouse);
} else {
PlatformFFI.stopDesktopWebListener();
}
}
static void setMethodCallHandler(FMethod callback) {
PlatformFFI.setMethodCallHandler(callback);
}
static Future<bool> invokeMethod(String method) async {
return await PlatformFFI.invokeMethod(method);
}
}
class Peer {
final String id;
final String username;
final String hostname;
final String platform;
Peer.fromJson(String id, Map<String, dynamic> json)
: id = id,
username = json['username'],
hostname = json['hostname'],
platform = json['platform'];
}
class Display {
double x = 0;
double y = 0;
int width = 0;
int height = 0;
}
class PeerInfo {
String version = "";
String username = "";
String hostname = "";
String platform = "";
bool sasEnabled = false;
int currentDisplay = 0;
List<Display> displays = [];
}
void savePreference(String id, double xCursor, double yCursor, double xCanvas,
double yCanvas, double scale, int currentDisplay) async {
SharedPreferences prefs = await SharedPreferences.getInstance();
final p = Map<String, dynamic>();
p['xCursor'] = xCursor;
p['yCursor'] = yCursor;
p['xCanvas'] = xCanvas;
p['yCanvas'] = yCanvas;
p['scale'] = scale;
p['currentDisplay'] = currentDisplay;
prefs.setString('peer' + id, json.encode(p));
}
Future<Map<String, dynamic>?> getPreference(String id) async {
if (!isDesktop) return null;
SharedPreferences prefs = await SharedPreferences.getInstance();
var p = prefs.getString('peer' + id);
if (p == null) return null;
Map<String, dynamic> m = json.decode(p);
return m;
}
void removePreference(String id) async {
SharedPreferences prefs = await SharedPreferences.getInstance();
prefs.remove('peer' + id);
}
void initializeCursorAndCanvas() async {
var p = await getPreference(FFI.id);
int currentDisplay = 0;
if (p != null) {
currentDisplay = p['currentDisplay'];
}
if (p == null || currentDisplay != FFI.ffiModel.pi.currentDisplay) {
FFI.cursorModel
.updateDisplayOrigin(FFI.ffiModel.display.x, FFI.ffiModel.display.y);
return;
}
double xCursor = p['xCursor'];
double yCursor = p['yCursor'];
double xCanvas = p['xCanvas'];
double yCanvas = p['yCanvas'];
double scale = p['scale'];
FFI.cursorModel.updateDisplayOriginWithCursor(
FFI.ffiModel.display.x, FFI.ffiModel.display.y, xCursor, yCursor);
FFI.canvasModel.update(xCanvas, yCanvas, scale);
}
String translate(String name) {
if (name.startsWith('Failed to') && name.contains(': ')) {
return name.split(': ').map((x) => translate(x)).join(': ');
}
var a = 'translate';
var b = '{"locale": "$localeName", "text": "$name"}';
return FFI.getByName(a, b);
}