screen corners: fix visibility for multimonitor with varying fullscreen state

.config/quickshell/ii/modules/screenCorners/ScreenCorners.qml

@@ -13,7 +13,8 @@ Scope {
 
     component CornerPanelWindow: PanelWindow {
         id: cornerPanelWindow
-        visible: (Config.options.appearance.fakeScreenRounding === 1 || (Config.options.appearance.fakeScreenRounding === 2 && !activeWindow?.fullscreen))
+        property bool fullscreen
+        visible: (Config.options.appearance.fakeScreenRounding === 1 || (Config.options.appearance.fakeScreenRounding === 2 && !fullscreen))
         property var corner
 
         exclusionMode: ExclusionMode.Ignore
@@ -44,22 +45,34 @@ Scope {
         model: Quickshell.screens
 
         Scope {
+            id: monitorScope
             required property var modelData
+            property HyprlandMonitor monitor: Hyprland.monitorFor(modelData)
+
+            // Hide when fullscreen
+            property list<HyprlandWorkspace> workspacesForMonitor: Hyprland.workspaces.values.filter(workspace=>workspace.monitor && workspace.monitor.name == monitor.name)
+            property var activeWorkspaceWithFullscreen: workspacesForMonitor.filter(workspace=>((workspace.toplevels.values.filter(window=>window.wayland.fullscreen)[0] != undefined) && workspace.active))[0]
+            property bool fullscreen: activeWorkspaceWithFullscreen != undefined
+
             CornerPanelWindow {
                 screen: modelData
                 corner: RoundCorner.CornerEnum.TopLeft
+                fullscreen: monitorScope.fullscreen
             }
             CornerPanelWindow {
                 screen: modelData
                 corner: RoundCorner.CornerEnum.TopRight
+                fullscreen: monitorScope.fullscreen
             }
             CornerPanelWindow {
                 screen: modelData
                 corner: RoundCorner.CornerEnum.BottomLeft
+                fullscreen: monitorScope.fullscreen
             }
             CornerPanelWindow {
                 screen: modelData
                 corner: RoundCorner.CornerEnum.BottomRight
+                fullscreen: monitorScope.fullscreen
             }
         }
     }