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use uuid as session id

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Signed-off-by: 21pages <pages21@163.com>
This commit is contained in:
21pages
2023-06-06 07:39:44 +08:00
parent 71838ad821
commit 2ececed0c1
36 changed files with 706 additions and 546 deletions
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236
flutter/lib/models/model.dart
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@@ -27,6 +27,7 @@ import 'package:image/image.dart' as img2;
import 'package:flutter_custom_cursor/cursor_manager.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:get/get.dart';
import 'package:uuid/uuid.dart';
import 'package:window_manager/window_manager.dart';
import '../common.dart';
@@ -36,7 +37,7 @@ import 'input_model.dart';
import 'platform_model.dart';
typedef HandleMsgBox = Function(Map<String, dynamic> evt, String id);
typedef ReconnectHandle = Function(OverlayDialogManager, String, bool);
typedef ReconnectHandle = Function(OverlayDialogManager, SessionID, bool);
final _waitForImage = <String, bool>{};
class FfiModel with ChangeNotifier {
@@ -52,6 +53,7 @@ class FfiModel with ChangeNotifier {
var _reconnects = 1;
bool _viewOnly = false;
WeakReference<FFI> parent;
late final SessionID sessionId;
Map<String, bool> get permissions => _permissions;
@@ -77,6 +79,7 @@ class FfiModel with ChangeNotifier {
FfiModel(this.parent) {
clear();
sessionId = parent.target!.sessionId;
}
toggleTouchMode() {
@@ -139,20 +142,21 @@ class FfiModel with ChangeNotifier {
_permissions.clear();
}
StreamEventHandler startEventListener(String peerId) {
// todo: why called by two position
StreamEventHandler startEventListener(SessionID sessionId, String peerId) {
return (evt) async {
var name = evt['name'];
if (name == 'msgbox') {
handleMsgBox(evt, peerId);
handleMsgBox(evt, sessionId, peerId);
} else if (name == 'peer_info') {
handlePeerInfo(evt, peerId);
} else if (name == 'sync_peer_info') {
handleSyncPeerInfo(evt, peerId);
handleSyncPeerInfo(evt, sessionId);
} else if (name == 'connection_ready') {
setConnectionType(
peerId, evt['secure'] == 'true', evt['direct'] == 'true');
} else if (name == 'switch_display') {
handleSwitchDisplay(evt, peerId);
handleSwitchDisplay(evt, sessionId, peerId);
} else if (name == 'cursor_data') {
await parent.target?.cursorModel.updateCursorData(evt);
} else if (name == 'cursor_id') {
@@ -193,7 +197,7 @@ class FfiModel with ChangeNotifier {
} else if (name == 'update_block_input_state') {
updateBlockInputState(evt, peerId);
} else if (name == 'update_privacy_mode') {
updatePrivacyMode(evt, peerId);
updatePrivacyMode(evt, sessionId, peerId);
} else if (name == 'new_connection') {
var uni_links = evt['uni_links'].toString();
if (uni_links.startsWith(kUniLinksPrefix)) {
@@ -205,10 +209,10 @@ class FfiModel with ChangeNotifier {
final show = evt['show'].toString() == 'true';
parent.target?.serverModel.setShowElevation(show);
} else if (name == 'cancel_msgbox') {
cancelMsgBox(evt, peerId);
cancelMsgBox(evt, sessionId);
} else if (name == 'switch_back') {
final peer_id = evt['peer_id'].toString();
await bind.sessionSwitchSides(id: peer_id);
await bind.sessionSwitchSides(sessionId: sessionId);
closeConnection(id: peer_id);
} else if (name == 'portable_service_running') {
parent.target?.elevationModel.onPortableServiceRunning(evt);
@@ -234,12 +238,12 @@ class FfiModel with ChangeNotifier {
} else if (name == 'plugin_manager') {
pluginManager.handleEvent(evt);
} else if (name == 'plugin_event') {
handlePluginEvent(
evt, peerId, (Map<String, dynamic> e) => handleMsgBox(e, peerId));
handlePluginEvent(evt,
(Map<String, dynamic> e) => handleMsgBox(e, sessionId, peerId));
} else if (name == 'plugin_reload') {
handleReloading(evt, peerId);
handleReloading(evt);
} else if (name == 'plugin_option') {
handleOption(evt, peerId);
handleOption(evt);
} else {
debugPrint('Unknown event name: $name');
}
@@ -271,8 +275,8 @@ class FfiModel with ChangeNotifier {
}
/// Bind the event listener to receive events from the Rust core.
updateEventListener(String peerId) {
platformFFI.setEventCallback(startEventListener(peerId));
updateEventListener(SessionID sessionId, String peerId) {
platformFFI.setEventCallback(startEventListener(sessionId, peerId));
}
handleAliasChanged(Map<String, dynamic> evt) {
@@ -282,18 +286,19 @@ class FfiModel with ChangeNotifier {
}
}
_updateCurDisplay(String peerId, Display newDisplay) {
_updateCurDisplay(SessionID sessionId, Display newDisplay) {
if (newDisplay != _display) {
if (newDisplay.x != _display.x || newDisplay.y != _display.y) {
parent.target?.cursorModel
.updateDisplayOrigin(newDisplay.x, newDisplay.y);
}
_display = newDisplay;
_updateSessionWidthHeight(peerId);
_updateSessionWidthHeight(sessionId);
}
}
handleSwitchDisplay(Map<String, dynamic> evt, String peerId) {
handleSwitchDisplay(
Map<String, dynamic> evt, SessionID sessionId, String peerId) {
_pi.currentDisplay = int.parse(evt['display']);
var newDisplay = Display();
newDisplay.x = double.tryParse(evt['x']) ?? newDisplay.x;
@@ -306,7 +311,7 @@ class FfiModel with ChangeNotifier {
newDisplay.originalHeight =
int.tryParse(evt['original_height']) ?? kInvalidResolutionValue;
_updateCurDisplay(peerId, newDisplay);
_updateCurDisplay(sessionId, newDisplay);
try {
CurrentDisplayState.find(peerId).value = _pi.currentDisplay;
@@ -318,15 +323,15 @@ class FfiModel with ChangeNotifier {
notifyListeners();
}
cancelMsgBox(Map<String, dynamic> evt, String id) {
cancelMsgBox(Map<String, dynamic> evt, SessionID sessionId) {
if (parent.target == null) return;
final dialogManager = parent.target!.dialogManager;
final tag = '$id-${evt['tag']}';
final tag = '$sessionId-${evt['tag']}';
dialogManager.dismissByTag(tag);
}
/// Handle the message box event based on [evt] and [id].
handleMsgBox(Map<String, dynamic> evt, String id) {
handleMsgBox(Map<String, dynamic> evt, SessionID sessionId, String peerId) {
if (parent.target == null) return;
final dialogManager = parent.target!.dialogManager;
final type = evt['type'];
@@ -334,43 +339,43 @@ class FfiModel with ChangeNotifier {
final text = evt['text'];
final link = evt['link'];
if (type == 're-input-password') {
wrongPasswordDialog(id, dialogManager, type, title, text);
wrongPasswordDialog(sessionId, dialogManager, type, title, text);
} else if (type == 'input-password') {
enterPasswordDialog(id, dialogManager);
enterPasswordDialog(sessionId, dialogManager);
} else if (type == 'session-login' || type == 'session-re-login') {
enterUserLoginDialog(id, dialogManager);
enterUserLoginDialog(sessionId, dialogManager);
} else if (type == 'session-login-password' ||
type == 'session-login-password') {
enterUserLoginAndPasswordDialog(id, dialogManager);
enterUserLoginAndPasswordDialog(sessionId, dialogManager);
} else if (type == 'restarting') {
showMsgBox(id, type, title, text, link, false, dialogManager,
showMsgBox(sessionId, type, title, text, link, false, dialogManager,
hasCancel: false);
} else if (type == 'wait-remote-accept-nook') {
showWaitAcceptDialog(id, type, title, text, dialogManager);
showWaitAcceptDialog(sessionId, type, title, text, dialogManager);
} else if (type == 'on-uac' || type == 'on-foreground-elevated') {
showOnBlockDialog(id, type, title, text, dialogManager);
showOnBlockDialog(sessionId, type, title, text, dialogManager);
} else if (type == 'wait-uac') {
showWaitUacDialog(id, dialogManager, type);
showWaitUacDialog(sessionId, dialogManager, type);
} else if (type == 'elevation-error') {
showElevationError(id, type, title, text, dialogManager);
showElevationError(sessionId, type, title, text, dialogManager);
} else if (type == 'relay-hint') {
showRelayHintDialog(id, type, title, text, dialogManager);
showRelayHintDialog(sessionId, type, title, text, dialogManager);
} else {
var hasRetry = evt['hasRetry'] == 'true';
showMsgBox(id, type, title, text, link, hasRetry, dialogManager);
showMsgBox(sessionId, type, title, text, link, hasRetry, dialogManager);
}
}
/// Show a message box with [type], [title] and [text].
showMsgBox(String id, String type, String title, String text, String link,
bool hasRetry, OverlayDialogManager dialogManager,
showMsgBox(SessionID sessionId, String type, String title, String text,
String link, bool hasRetry, OverlayDialogManager dialogManager,
{bool? hasCancel}) {
msgBox(id, type, title, text, link, dialogManager,
msgBox(sessionId, type, title, text, link, dialogManager,
hasCancel: hasCancel, reconnect: reconnect);
_timer?.cancel();
if (hasRetry) {
_timer = Timer(Duration(seconds: _reconnects), () {
reconnect(dialogManager, id, false);
reconnect(dialogManager, sessionId, false);
});
_reconnects *= 2;
} else {
@@ -378,17 +383,17 @@ class FfiModel with ChangeNotifier {
}
}
void reconnect(
OverlayDialogManager dialogManager, String id, bool forceRelay) {
bind.sessionReconnect(id: id, forceRelay: forceRelay);
void reconnect(OverlayDialogManager dialogManager, SessionID sessionId,
bool forceRelay) {
bind.sessionReconnect(sessionId: sessionId, forceRelay: forceRelay);
clearPermissions();
dialogManager.showLoading(translate('Connecting...'),
onCancel: closeConnection);
}
void showRelayHintDialog(String id, String type, String title, String text,
OverlayDialogManager dialogManager) {
dialogManager.show(tag: '$id-$type', (setState, close, context) {
void showRelayHintDialog(SessionID sessionId, String type, String title,
String text, OverlayDialogManager dialogManager) {
dialogManager.show(tag: '$sessionId-$type', (setState, close, context) {
onClose() {
closeConnection();
close();
@@ -403,15 +408,17 @@ class FfiModel with ChangeNotifier {
actions: [
dialogButton('Close', onPressed: onClose, isOutline: true),
dialogButton('Retry',
onPressed: () => reconnect(dialogManager, id, false)),
onPressed: () => reconnect(dialogManager, sessionId, false)),
dialogButton('Connect via relay',
onPressed: () => reconnect(dialogManager, id, true),
onPressed: () => reconnect(dialogManager, sessionId, true),
buttonStyle: style),
dialogButton('Always connect via relay', onPressed: () {
const option = 'force-always-relay';
bind.sessionPeerOption(
id: id, name: option, value: bool2option(option, true));
reconnect(dialogManager, id, true);
sessionId: sessionId,
name: option,
value: bool2option(option, true));
reconnect(dialogManager, sessionId, true);
}, buttonStyle: style),
],
onCancel: onClose,
@@ -419,13 +426,14 @@ class FfiModel with ChangeNotifier {
});
}
_updateSessionWidthHeight(String id) {
_updateSessionWidthHeight(SessionID sessionId) {
parent.target?.canvasModel.updateViewStyle();
if (display.width <= 0 || display.height <= 0) {
debugPrintStack(
label: 'invalid display size (${display.width},${display.height})');
} else {
bind.sessionSetSize(id: id, width: display.width, height: display.height);
bind.sessionSetSize(
sessionId: sessionId, width: display.width, height: display.height);
}
}
@@ -461,8 +469,9 @@ class FfiModel with ChangeNotifier {
.showMobileActionsOverlay(ffi: parent.target!));
}
} else {
_touchMode =
await bind.sessionGetOption(id: peerId, arg: 'touch-mode') != '';
_touchMode = await bind.sessionGetOption(
sessionId: sessionId, arg: 'touch-mode') !=
'';
}
if (connType == ConnType.fileTransfer) {
@@ -476,7 +485,7 @@ class FfiModel with ChangeNotifier {
stateGlobal.displaysCount.value = _pi.displays.length;
if (_pi.currentDisplay < _pi.displays.length) {
_display = _pi.displays[_pi.currentDisplay];
_updateSessionWidthHeight(peerId);
_updateSessionWidthHeight(sessionId);
}
if (displays.isNotEmpty) {
parent.target?.dialogManager.showLoading(
@@ -491,8 +500,10 @@ class FfiModel with ChangeNotifier {
parent.target?.elevationModel.onPeerInfo(_pi);
}
if (connType == ConnType.defaultConn) {
setViewOnly(peerId,
bind.sessionGetToggleOptionSync(id: peerId, arg: 'view-only'));
setViewOnly(
peerId,
bind.sessionGetToggleOptionSync(
sessionId: sessionId, arg: 'view-only'));
}
if (connType == ConnType.defaultConn) {
final platform_additions = evt['platform_additions'];
@@ -547,7 +558,7 @@ class FfiModel with ChangeNotifier {
}
/// Handle the peer info synchronization event based on [evt].
handleSyncPeerInfo(Map<String, dynamic> evt, String peerId) async {
handleSyncPeerInfo(Map<String, dynamic> evt, SessionID sessionId) async {
if (evt['displays'] != null) {
List<dynamic> displays = json.decode(evt['displays']);
List<Display> newDisplays = [];
@@ -557,7 +568,7 @@ class FfiModel with ChangeNotifier {
_pi.displays = newDisplays;
stateGlobal.displaysCount.value = _pi.displays.length;
if (_pi.currentDisplay >= 0 && _pi.currentDisplay < _pi.displays.length) {
_updateCurDisplay(peerId, _pi.displays[_pi.currentDisplay]);
_updateCurDisplay(sessionId, _pi.displays[_pi.currentDisplay]);
}
}
notifyListeners();
@@ -573,11 +584,12 @@ class FfiModel with ChangeNotifier {
}
}
updatePrivacyMode(Map<String, dynamic> evt, String peerId) {
updatePrivacyMode(
Map<String, dynamic> evt, SessionID sessionId, String peerId) {
notifyListeners();
try {
PrivacyModeState.find(peerId).value =
bind.sessionGetToggleOptionSync(id: peerId, arg: 'privacy-mode');
PrivacyModeState.find(peerId).value = bind.sessionGetToggleOptionSync(
sessionId: sessionId, arg: 'privacy-mode');
} catch (e) {
//
}
@@ -592,8 +604,8 @@ class FfiModel with ChangeNotifier {
if (value) {
ShowRemoteCursorState.find(id).value = value;
} else {
ShowRemoteCursorState.find(id).value =
bind.sessionGetToggleOptionSync(id: id, arg: 'show-remote-cursor');
ShowRemoteCursorState.find(id).value = bind.sessionGetToggleOptionSync(
sessionId: sessionId, arg: 'show-remote-cursor');
}
} catch (e) {
//
@@ -612,11 +624,15 @@ class ImageModel with ChangeNotifier {
String id = '';
late final SessionID sessionId;
WeakReference<FFI> parent;
final List<Function(String)> callbacksOnFirstImage = [];
ImageModel(this.parent);
ImageModel(this.parent) {
sessionId = parent.target!.sessionId;
}
addCallbackOnFirstImage(Function(String) cb) => callbacksOnFirstImage.add(cb);
@@ -645,7 +661,7 @@ class ImageModel with ChangeNotifier {
isWeb ? ui.PixelFormat.rgba8888 : ui.PixelFormat.bgra8888,
onPixelsCopied: () {
// Unlock the rgba memory from rust codes.
platformFFI.nextRgba(id);
platformFFI.nextRgba(sessionId);
}).then((image) {
if (parent.target?.id != pid) return;
try {
@@ -674,7 +690,7 @@ class ImageModel with ChangeNotifier {
await initializeCursorAndCanvas(parent.target!);
}
if (parent.target?.ffiModel.isPeerAndroid ?? false) {
bind.sessionSetViewStyle(id: id, value: 'adaptive');
bind.sessionSetViewStyle(sessionId: sessionId, value: 'adaptive');
parent.target?.canvasModel.updateViewStyle();
}
}
@@ -793,6 +809,7 @@ class CanvasModel with ChangeNotifier {
// double windowBorderWidth = 0.0;
// remote id
String id = '';
late final SessionID sessionId;
// scroll offset x percent
double _scrollX = 0.0;
// scroll offset y percent
@@ -804,7 +821,9 @@ class CanvasModel with ChangeNotifier {
WeakReference<FFI> parent;
CanvasModel(this.parent);
CanvasModel(this.parent) {
sessionId = parent.target!.sessionId;
}
double get x => _x;
double get y => _y;
@@ -847,7 +866,7 @@ class CanvasModel with ChangeNotifier {
return Size(w < 0 ? 0 : w, h < 0 ? 0 : h);
}
final style = await bind.sessionGetViewStyle(id: id);
final style = await bind.sessionGetViewStyle(sessionId: sessionId);
if (style == null) {
return;
}
@@ -883,7 +902,7 @@ class CanvasModel with ChangeNotifier {
}
updateScrollStyle() async {
final style = await bind.sessionGetScrollStyle(id: id);
final style = await bind.sessionGetScrollStyle(sessionId: sessionId);
if (style == kRemoteScrollStyleBar) {
_scrollStyle = ScrollStyle.scrollbar;
_resetScroll();
@@ -1358,8 +1377,8 @@ class CursorModel with ChangeNotifier {
Future<bool> _updateCache(
Uint8List rgba, ui.Image image, int id, int w, int h) async {
Uint8List? data;
img2.Image imgOrigin =
img2.Image.fromBytes(width: w, height:h, bytes: rgba.buffer, order: img2.ChannelOrder.rgba);
img2.Image imgOrigin = img2.Image.fromBytes(
width: w, height: h, bytes: rgba.buffer, order: img2.ChannelOrder.rgba);
if (Platform.isWindows) {
data = imgOrigin.getBytes(order: img2.ChannelOrder.bgra);
} else {
@@ -1474,9 +1493,9 @@ class QualityMonitorModel with ChangeNotifier {
bool get show => _show;
QualityMonitorData get data => _data;
checkShowQualityMonitor(String id) async {
checkShowQualityMonitor(SessionID sessionId) async {
final show = await bind.sessionGetToggleOption(
id: id, arg: 'show-quality-monitor') ==
sessionId: sessionId, arg: 'show-quality-monitor') ==
true;
if (_show != show) {
_show = show;
@@ -1510,32 +1529,35 @@ class RecordingModel with ChangeNotifier {
onSwitchDisplay() {
if (isIOS || !_start) return;
var id = parent.target?.id;
final sessionId = parent.target?.sessionId;
int? width = parent.target?.canvasModel.getDisplayWidth();
int? height = parent.target?.canvasModel.getDisplayHeight();
if (id == null || width == null || height == null) return;
bind.sessionRecordScreen(id: id, start: true, width: width, height: height);
if (sessionId == null || width == null || height == null) return;
bind.sessionRecordScreen(
sessionId: sessionId, start: true, width: width, height: height);
}
toggle() {
if (isIOS) return;
var id = parent.target?.id;
if (id == null) return;
final sessionId = parent.target?.sessionId;
if (sessionId == null) return;
_start = !_start;
notifyListeners();
if (_start) {
bind.sessionRefresh(id: id);
bind.sessionRefresh(sessionId: sessionId);
} else {
bind.sessionRecordScreen(id: id, start: false, width: 0, height: 0);
bind.sessionRecordScreen(
sessionId: sessionId, start: false, width: 0, height: 0);
}
}
onClose() {
if (isIOS) return;
var id = parent.target?.id;
if (id == null) return;
final sessionId = parent.target?.sessionId;
if (sessionId == null) return;
_start = false;
bind.sessionRecordScreen(id: id, start: false, width: 0, height: 0);
bind.sessionRecordScreen(
sessionId: sessionId, start: false, width: 0, height: 0);
}
}
@@ -1558,6 +1580,7 @@ enum ConnType { defaultConn, fileTransfer, portForward, rdp }
/// Flutter state manager and data communication with the Rust core.
class FFI {
final sessionId = Uuid().v4obj();
var id = '';
var version = '';
var connType = ConnType.defaultConn;
@@ -1610,10 +1633,8 @@ class FFI {
assert(!(isFileTransfer && isPortForward), 'more than one connect type');
if (isFileTransfer) {
connType = ConnType.fileTransfer;
id = 'ft_$id';
} else if (isPortForward) {
connType = ConnType.portForward;
id = 'pf_$id';
} else {
chatModel.resetClientMode();
connType = ConnType.defaultConn;
@@ -1623,6 +1644,7 @@ class FFI {
}
// ignore: unused_local_variable
final addRes = bind.sessionAddSync(
sessionId: sessionId,
id: id,
isFileTransfer: isFileTransfer,
isPortForward: isPortForward,
@@ -1631,8 +1653,8 @@ class FFI {
forceRelay: forceRelay ?? false,
password: password ?? "",
);
final stream = bind.sessionStart(id: id);
final cb = ffiModel.startEventListener(id);
final stream = bind.sessionStart(sessionId: sessionId, id: id);
final cb = ffiModel.startEventListener(sessionId, id);
() async {
final useTextureRender = bind.mainUseTextureRender();
// Preserved for the rgba data.
@@ -1664,11 +1686,11 @@ class FFI {
}
} else {
// Fetch the image buffer from rust codes.
final sz = platformFFI.getRgbaSize(id);
final sz = platformFFI.getRgbaSize(sessionId);
if (sz == null || sz == 0) {
return;
}
final rgba = platformFFI.getRgba(id, sz);
final rgba = platformFFI.getRgba(sessionId, sz);
if (rgba != null) {
imageModel.onRgba(rgba);
}
@@ -1682,10 +1704,10 @@ class FFI {
}
/// Login with [password], choose if the client should [remember] it.
void login(String osUsername, String osPassword, String id, String password,
bool remember) {
void login(String osUsername, String osPassword, SessionID sessionId,
String password, bool remember) {
bind.sessionLogin(
id: id,
sessionId: sessionId,
osUsername: osUsername,
osPassword: osPassword,
password: password,
@@ -1696,15 +1718,21 @@ class FFI {
Future<void> close() async {
chatModel.close();
if (imageModel.image != null && !isWebDesktop) {
await setCanvasConfig(id, cursorModel.x, cursorModel.y, canvasModel.x,
canvasModel.y, canvasModel.scale, ffiModel.pi.currentDisplay);
await setCanvasConfig(
sessionId,
cursorModel.x,
cursorModel.y,
canvasModel.x,
canvasModel.y,
canvasModel.scale,
ffiModel.pi.currentDisplay);
}
imageModel.update(null);
cursorModel.clear();
ffiModel.clear();
canvasModel.clear();
inputModel.resetModifiers();
await bind.sessionClose(id: id);
await bind.sessionClose(sessionId: sessionId);
debugPrint('model $id closed');
id = '';
}
@@ -1795,8 +1823,14 @@ class PeerInfo {
const canvasKey = 'canvas';
Future<void> setCanvasConfig(String id, double xCursor, double yCursor,
double xCanvas, double yCanvas, double scale, int currentDisplay) async {
Future<void> setCanvasConfig(
SessionID sessionId,
double xCursor,
double yCursor,
double xCanvas,
double yCanvas,
double scale,
int currentDisplay) async {
final p = <String, dynamic>{};
p['xCursor'] = xCursor;
p['yCursor'] = yCursor;
@@ -1804,12 +1838,14 @@ Future<void> setCanvasConfig(String id, double xCursor, double yCursor,
p['yCanvas'] = yCanvas;
p['scale'] = scale;
p['currentDisplay'] = currentDisplay;
await bind.sessionSetFlutterConfig(id: id, k: canvasKey, v: jsonEncode(p));
await bind.sessionSetFlutterConfig(
sessionId: sessionId, k: canvasKey, v: jsonEncode(p));
}
Future<Map<String, dynamic>?> getCanvasConfig(String id) async {
Future<Map<String, dynamic>?> getCanvasConfig(SessionID sessionId) async {
if (!isWebDesktop) return null;
var p = await bind.sessionGetFlutterConfig(id: id, k: canvasKey);
var p =
await bind.sessionGetFlutterConfig(sessionId: sessionId, k: canvasKey);
if (p == null || p.isEmpty) return null;
try {
Map<String, dynamic> m = json.decode(p);
@@ -1819,12 +1855,8 @@ Future<Map<String, dynamic>?> getCanvasConfig(String id) async {
}
}
void removePreference(String id) async {
await bind.sessionSetFlutterConfig(id: id, k: canvasKey, v: '');
}
Future<void> initializeCursorAndCanvas(FFI ffi) async {
var p = await getCanvasConfig(ffi.id);
var p = await getCanvasConfig(ffi.sessionId);
int currentDisplay = 0;
if (p != null) {
currentDisplay = p['currentDisplay'];