From 7dc874104b144104bd48a6b0c70c3c3d79cbb15f Mon Sep 17 00:00:00 2001
From: John Bundgaard <2511912+jbdk@users.noreply.github.com>
Date: Thu, 5 Jan 2023 05:43:09 +0100
Subject: [PATCH] WindowServer: Redraw Taskbar on window highlight during
 switching

---
 Userland/Services/WindowServer/WindowManager.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Userland/Services/WindowServer/WindowManager.cpp b/Userland/Services/WindowServer/WindowManager.cpp
index e5b69f5865..7751655290 100644
--- a/Userland/Services/WindowServer/WindowManager.cpp
+++ b/Userland/Services/WindowServer/WindowManager.cpp
@@ -1791,6 +1791,18 @@ void WindowManager::set_highlight_window(Window* new_highlight_window)
         new_highlight_window->invalidate(true, true);
         Compositor::the().invalidate_screen(new_highlight_window->frame().render_rect());
     }
+
+    if (active_fullscreen_window()) {
+        // Find the Taskbar window and invalidate it so it draws correctly
+        for_each_visible_window_from_back_to_front([](Window& window) {
+            if (window.type() == WindowType::Taskbar) {
+                window.invalidate();
+                return IterationDecision::Break;
+            }
+            return IterationDecision::Continue;
+        });
+    }
+
     // Invalidate occlusions in case the state change changes geometry
     Compositor::the().invalidate_occlusions();
 }