client side view mode

Signed-off-by: 21pages <pages21@163.com>

flutter/lib/desktop/pages/desktop_setting_page.dart

@@ -1318,6 +1318,7 @@ class _DisplayState extends State<_Display> {
 
   Widget other(BuildContext context) {
     return _Card(title: 'Other Default Options', children: [
+      otherRow('View Mode', 'view-only'),
       otherRow('show_monitors_tip', 'show_monitors_toolbar'),
       otherRow('Show remote cursor', 'show_remote_cursor'),
       otherRow('Zoom cursor', 'zoom-cursor'),

flutter/lib/desktop/pages/remote_page.dart

@@ -139,8 +139,9 @@ class _RemotePageState extends State<RemotePage>
     _ffi.ffiModel.updateEventListener(widget.id);
     _ffi.qualityMonitorModel.checkShowQualityMonitor(widget.id);
     // Session option should be set after models.dart/FFI.start
-    _showRemoteCursor.value = bind.sessionGetToggleOptionSync(
-        id: widget.id, arg: 'show-remote-cursor');
+    // _showRemoteCursor has been set by setViewOnly
+    _ffi.ffiModel.setViewOnly(widget.id,
+        bind.sessionGetToggleOptionSync(id: widget.id, arg: 'view-only'));
     _zoomCursor.value =
         bind.sessionGetToggleOptionSync(id: widget.id, arg: 'zoom-cursor');
     DesktopMultiWindow.addListener(this);

flutter/lib/desktop/widgets/remote_toolbar.dart

@@ -385,6 +385,7 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
   }
 
   Widget _buildToolbar(BuildContext context) {
+    final ffiModel = Provider.of<FfiModel>(context);
     final List<Widget> toolbarItems = [];
     if (!isWebDesktop) {
       toolbarItems.add(_PinMenu(state: widget.state));
@@ -410,7 +411,9 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
       state: widget.state,
       setFullscreen: _setFullscreen,
     ));
-    toolbarItems.add(_KeyboardMenu(id: widget.id, ffi: widget.ffi));
+    if (!ffiModel.viewOnly) {
+      toolbarItems.add(_KeyboardMenu(id: widget.id, ffi: widget.ffi));
+    }
     if (!isWeb) {
       toolbarItems.add(_ChatMenu(id: widget.id, ffi: widget.ffi));
       toolbarItems.add(_VoiceCallMenu(id: widget.id, ffi: widget.ffi));
@@ -820,8 +823,10 @@ class _ControlMenu extends StatelessWidget {
 
   ctrlAltDel() {
     final perms = ffi.ffiModel.permissions;
+    final viewOnly = ffi.ffiModel.viewOnly;
     final pi = ffi.ffiModel.pi;
-    final visible = perms['keyboard'] != false &&
+    final visible = !viewOnly &&
+        perms['keyboard'] != false &&
         (pi.platform == kPeerPlatformLinux || pi.sasEnabled);
     if (!visible) return Offstage();
     return _MenuItemButton(
@@ -846,7 +851,8 @@ class _ControlMenu extends StatelessWidget {
 
   insertLock() {
     final perms = ffi.ffiModel.permissions;
-    final visible = perms['keyboard'] != false;
+    final viewOnly = ffi.ffiModel.viewOnly;
+    final visible = !viewOnly && perms['keyboard'] != false;
     if (!visible) return Offstage();
     return _MenuItemButton(
         child: Text(translate('Insert Lock')),
@@ -963,6 +969,7 @@ class _DisplayMenuState extends State<_DisplayMenu> {
           codec(),
           resolutions(),
           Divider(),
+          view_only(),
           showRemoteCursor(),
           zoomCursor(),
           showQualityMonitor(),
@@ -1456,11 +1463,28 @@ class _DisplayMenuState extends State<_DisplayMenu> {
         child: Text(translate("Resolution")));
   }
 
+  view_only() {
+    final visible = version_cmp(pi.version, '1.2.0') >= 0;
+    if (!visible) return Offstage();
+    final ffiModel = widget.ffi.ffiModel;
+    return _CheckboxMenuButton(
+        value: ffiModel.viewOnly,
+        onChanged: (value) async {
+          if (value == null) return;
+          bind.sessionSetViewOnly(id: widget.id, viewOnly: value);
+          ffiModel.setViewOnly(widget.id, value);
+        },
+        ffi: widget.ffi,
+        child: Text(translate('View Mode')));
+  }
+
   showRemoteCursor() {
     if (widget.ffi.ffiModel.pi.platform == kPeerPlatformAndroid) {
       return Offstage();
     }
-    final visible = !widget.ffi.canvasModel.cursorEmbedded;
+    final ffiModel = widget.ffi.ffiModel;
+    final visible =
+        !ffiModel.viewOnly && !widget.ffi.canvasModel.cursorEmbedded;
     if (!visible) return Offstage();
     final state = ShowRemoteCursorState.find(widget.id);
     final option = 'show-remote-cursor';
@@ -1543,7 +1567,10 @@ class _DisplayMenuState extends State<_DisplayMenu> {
   }
 
   disableClipboard() {
-    final visible = perms['keyboard'] != false && perms['clipboard'] != false;
+    final ffiModel = widget.ffi.ffiModel;
+    final visible = perms['keyboard'] != false &&
+        perms['clipboard'] != false &&
+        !ffiModel.viewOnly;
     if (!visible) return Offstage();
     final option = 'disable-clipboard';
     final value = bind.sessionGetToggleOptionSync(id: widget.id, arg: option);

flutter/lib/models/model.dart

@@ -47,6 +47,7 @@ class FfiModel with ChangeNotifier {
   bool _touchMode = false;
   Timer? _timer;
   var _reconnects = 1;
+  bool _viewOnly = false;
   WeakReference<FFI> parent;
 
   Map<String, bool> get permissions => _permissions;
@@ -65,6 +66,8 @@ class FfiModel with ChangeNotifier {
 
   bool get isPeerAndroid => _pi.platform == kPeerPlatformAndroid;
 
+  bool get viewOnly => _viewOnly;
+
   set inputBlocked(v) {
     _inputBlocked = v;
   }
@@ -373,7 +376,8 @@ class FfiModel with ChangeNotifier {
   _updateSessionWidthHeight(String id) {
     parent.target?.canvasModel.updateViewStyle();
     if (display.width <= 0 || display.height <= 0) {
-      debugPrintStack(label: 'invalid display size (${display.width},${display.height})');
+      debugPrintStack(
+          label: 'invalid display size (${display.width},${display.height})');
     } else {
       bind.sessionSetSize(id: id, width: display.width, height: display.height);
     }
@@ -516,6 +520,19 @@ class FfiModel with ChangeNotifier {
       //
     }
   }
+
+  void setViewOnly(String id, bool value) {
+    if (value) {
+      ShowRemoteCursorState.find(id).value = value;
+    } else {
+      ShowRemoteCursorState.find(id).value =
+          bind.sessionGetToggleOptionSync(id: id, arg: 'show-remote-cursor');
+    }
+    if (_viewOnly != value) {
+      _viewOnly = value;
+      notifyListeners();
+    }
+  }
 }
 
 class ImageModel with ChangeNotifier {