feat/virtual_display_privacy_mode

Signed-off-by: fufesou <shuanglongchen@yeah.net>

flutter/lib/desktop/pages/desktop_setting_page.dart

@@ -1060,7 +1060,7 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
     tmpWrapper() {
       // Setting page is not modal, oldOptions should only be used when getting options, never when setting.
       Map<String, dynamic> oldOptions =
-          jsonDecode(bind.mainGetOptionsSync() as String);
+          jsonDecode(bind.mainGetOptionsSync());
       old(String key) {
         return (oldOptions[key] ?? '').trim();
       }
@@ -1151,6 +1151,7 @@ class _DisplayState extends State<_Display> {
               scrollStyle(context),
               imageQuality(context),
               codec(context),
+              privacyModeImpl(context),
               other(context),
             ]).marginOnly(bottom: _kListViewBottomMargin));
   }
@@ -1290,6 +1291,42 @@ class _DisplayState extends State<_Display> {
     ]);
   }
 
+  Widget privacyModeImpl(BuildContext context) {
+    final supportedPrivacyModeImpls = bind.mainSupportedPrivacyModeImpls();
+    late final List<dynamic> privacyModeImpls;
+    try {
+      privacyModeImpls = jsonDecode(supportedPrivacyModeImpls);
+    } catch (e) {
+      debugPrint('failed to parse supported privacy mode impls, err=$e');
+      return Offstage();
+    }
+    if (privacyModeImpls.length < 2) {
+      return Offstage();
+    }
+
+    final key = 'privacy-mode-impl-key';
+    onChanged(String value) async {
+      await bind.mainSetOption(key: key, value: value);
+      setState(() {});
+    }
+
+    String groupValue = bind.mainGetOptionSync(key: key);
+    if (groupValue.isEmpty) {
+      groupValue = bind.mainDefaultPrivacyModeImpl();
+    }
+    return _Card(
+      title: 'Privacy mode',
+      children: privacyModeImpls.map((impl) {
+        final d = impl as List<dynamic>;
+        return _Radio(context,
+            value: d[0] as String,
+            groupValue: groupValue,
+            label: d[1] as String,
+            onChanged: onChanged);
+      }).toList(),
+    );
+  }
+
   Widget otherRow(String label, String key) {
     final value = bind.mainGetUserDefaultOption(key: key) == 'Y';
     onChanged(bool b) async {