fix resolution restoration (#7572)

* Fix resolution restore. Screen resolution changes may be slow and cause errors in judgment. Remove the consideration of resolution changes caused by other processes.
* Keep the design unchange: when all connections end, revert to the resolution when there were no connections.
* Resolution menu use `scaledRect` for retina
* I can't reproduce the restoration failure of retina with 3rd software, but it maybe the same reason of slow resolution change.

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

flutter/lib/desktop/widgets/remote_toolbar.dart

@@ -1253,7 +1253,7 @@ class _ResolutionsMenuState extends State<_ResolutionsMenu> {
   FFI get ffi => widget.ffi;
   PeerInfo get pi => widget.ffi.ffiModel.pi;
   FfiModel get ffiModel => widget.ffi.ffiModel;
-  Rect? get rect => ffiModel.rect;
+  Rect? get rect => scaledRect();
   List<Resolution> get resolutions => pi.resolutions;
   bool get isWayland => bind.mainCurrentIsWayland();
 
@@ -1263,6 +1263,20 @@ class _ResolutionsMenuState extends State<_ResolutionsMenu> {
     _getLocalResolutionWayland();
   }
 
+  Rect? scaledRect() {
+    final scale = pi.scaleOfDisplay(pi.currentDisplay);
+    final rect = ffiModel.rect;
+    if (rect == null) {
+      return null;
+    }
+    return Rect.fromLTWH(
+      rect.left,
+      rect.top,
+      rect.width / scale,
+      rect.height / scale,
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final isVirtualDisplay = ffiModel.isVirtualDisplayResolution;
@@ -1296,9 +1310,8 @@ class _ResolutionsMenuState extends State<_ResolutionsMenu> {
     if (lastGroupValue == _kCustomResolutionValue) {
       _groupValue = _kCustomResolutionValue;
     } else {
-      var scale = pi.scaleOfDisplay(pi.currentDisplay);
       _groupValue =
-          '${(rect?.width ?? 0) ~/ scale}x${(rect?.height ?? 0) ~/ scale}';
+          '${(rect?.width ?? 0).toInt()}x${(rect?.height ?? 0).toInt()}';
     }
   }
 

src/server/display_service.rs

@@ -122,6 +122,8 @@ pub fn reset_resolutions() {
             );
         }
     }
+    // Can be cleared because reset resolutions is called when there is no client connected.
+    CHANGED_RESOLUTIONS.write().unwrap().clear();
 }
 
 #[inline]
@@ -235,9 +237,13 @@ pub(super) fn get_original_resolution(
             ..Default::default()
         }
     } else {
-        let mut changed_resolutions = CHANGED_RESOLUTIONS.write().unwrap();
+        let changed_resolutions = CHANGED_RESOLUTIONS.write().unwrap();
         let (width, height) = match changed_resolutions.get(display_name) {
             Some(res) => {
+                res.original
+                /*
+                The resolution change may not happen immediately, `changed` has been updated,
+                but the actual resolution is old, it will be mistaken for a third-party change.
                 if res.changed.0 != w as i32 || res.changed.1 != h as i32 {
                     // If the resolution is changed by third process, remove the record in changed_resolutions.
                     changed_resolutions.remove(display_name);
@@ -245,6 +251,7 @@ pub(super) fn get_original_resolution(
                 } else {
                     res.original
                 }
+                */
             }
             None => (w as _, h as _),
         };