fix: resize top edge (#9081)

Signed-off-by: fufesou <linlong1266@gmail.com>

flutter/lib/common.dart

@@ -3492,7 +3492,8 @@ Widget buildVirtualWindowFrame(BuildContext context, Widget child) {
   );
 }
 
-get windowEdgeSize => isLinux && !_linuxWindowResizable ? 0.0 : kWindowEdgeSize;
+get windowResizeEdgeSize =>
+    isLinux && !_linuxWindowResizable ? 0.0 : kWindowResizeEdgeSize;
 
 // `windowManager.setResizable(false)` will reset the window size to the default size on Linux and then set unresizable.
 // See _linuxWindowResizable for more details.
@@ -3570,3 +3571,19 @@ Widget netWorkErrorWidget() {
     ],
   ));
 }
+
+List<ResizeEdge>? get windowManagerEnableResizeEdges => isWindows
+    ? [
+        ResizeEdge.topLeft,
+        ResizeEdge.top,
+        ResizeEdge.topRight,
+      ]
+    : null;
+
+List<SubWindowResizeEdge>? get subWindowManagerEnableResizeEdges => isWindows
+    ? [
+        SubWindowResizeEdge.topLeft,
+        SubWindowResizeEdge.top,
+        SubWindowResizeEdge.topRight,
+      ]
+    : null;

flutter/lib/consts.dart

@@ -241,9 +241,9 @@ const kDefaultScrollDuration = Duration(milliseconds: 50);
 const kDefaultMouseWheelThrottleDuration = Duration(milliseconds: 50);
 const kFullScreenEdgeSize = 0.0;
 const kMaximizeEdgeSize = 0.0;
-// Do not use kWindowEdgeSize directly. Use `windowEdgeSize` in `common.dart` instead.
-final kWindowEdgeSize = isWindows ? 1.0 : 5.0;
-final kWindowBorderWidth = 1.0;
+// Do not use kWindowResizeEdgeSize directly. Use `windowResizeEdgeSize` in `common.dart` instead.
+const kWindowResizeEdgeSize = 5.0;
+const kWindowBorderWidth = 1.0;
 const kDesktopMenuPadding = EdgeInsets.only(left: 12.0, right: 3.0);
 const kFrameBorderRadius = 12.0;
 const kFrameClipRRectBorderRadius = 12.0;

flutter/lib/desktop/pages/connection_page.dart

@@ -257,8 +257,9 @@ class _ConnectionPageState extends State<ConnectionPage>
   @override
   void onWindowLeaveFullScreen() {
     // Restore edge border to default edge size.
-    stateGlobal.resizeEdgeSize.value =
-        stateGlobal.isMaximized.isTrue ? kMaximizeEdgeSize : windowEdgeSize;
+    stateGlobal.resizeEdgeSize.value = stateGlobal.isMaximized.isTrue
+        ? kMaximizeEdgeSize
+        : windowResizeEdgeSize;
   }
 
   @override

flutter/lib/desktop/pages/desktop_tab_page.dart

@@ -126,6 +126,7 @@ class _DesktopTabPageState extends State<DesktopTabPage>
         : Obx(
             () => DragToResizeArea(
               resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+              enableResizeEdges: windowManagerEnableResizeEdges,
               child: tabWidget,
             ),
           );

flutter/lib/desktop/pages/file_manager_tab_page.dart

@@ -111,6 +111,7 @@ class _FileManagerTabPageState extends State<FileManagerTabPage> {
         : SubWindowDragToResizeArea(
             child: tabWidget,
             resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+            enableResizeEdges: subWindowManagerEnableResizeEdges,
             windowId: stateGlobal.windowId,
           );
   }

flutter/lib/desktop/pages/install_page.dart

@@ -43,6 +43,7 @@ class _InstallPageState extends State<InstallPage> {
   Widget build(BuildContext context) {
     return DragToResizeArea(
       resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+      enableResizeEdges: windowManagerEnableResizeEdges,
       child: Container(
         child: Scaffold(
             backgroundColor: Theme.of(context).colorScheme.background,

flutter/lib/desktop/pages/port_forward_tab_page.dart

@@ -127,6 +127,7 @@ class _PortForwardTabPageState extends State<PortForwardTabPage> {
             () => SubWindowDragToResizeArea(
               child: tabWidget,
               resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+              enableResizeEdges: subWindowManagerEnableResizeEdges,
               windowId: stateGlobal.windowId,
             ),
           );

flutter/lib/desktop/pages/remote_tab_page.dart

@@ -228,6 +228,7 @@ class _ConnectionTabPageState extends State<ConnectionTabPage> {
               // Specially configured for a better resize area and remote control.
               childPadding: kDragToResizeAreaPadding,
               resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+              enableResizeEdges: subWindowManagerEnableResizeEdges,
               windowId: stateGlobal.windowId,
             ));
   }

flutter/lib/models/state_model.dart

@@ -14,7 +14,7 @@ class StateGlobal {
   bool _isMinimized = false;
   final RxBool isMaximized = false.obs;
   final RxBool _showTabBar = true.obs;
-  final RxDouble _resizeEdgeSize = RxDouble(windowEdgeSize);
+  final RxDouble _resizeEdgeSize = RxDouble(windowResizeEdgeSize);
   final RxDouble _windowBorderWidth = RxDouble(kWindowBorderWidth);
   final RxBool showRemoteToolBar = false.obs;
   final svcStatus = SvcStatus.notReady.obs;
@@ -93,7 +93,7 @@ class StateGlobal {
       ? kFullScreenEdgeSize
       : isMaximized.isTrue
           ? kMaximizeEdgeSize
-          : windowEdgeSize;
+          : windowResizeEdgeSize;
 
   String getInputSource({bool force = false}) {
     if (force || _inputSource.isEmpty) {