fix(windows): changing the theme activates the window (#978)

* Fix changing theme activates the window

* Add change file

* Combine unsafe blocks

.changes/windows-theme-active-state.md

@@ -0,0 +1,5 @@
+---
+tao: patch
+---
+
+Fix changing the theme activates the window on Windows

src/platform_impl/windows/dark_mode.rs

@@ -12,7 +12,7 @@ use windows::{
     Foundation::{BOOL, HANDLE, HMODULE, HWND, WPARAM},
     Graphics::Dwm::{DwmSetWindowAttribute, DWMWINDOWATTRIBUTE},
     System::LibraryLoader::*,
-    UI::{Accessibility::*, WindowsAndMessaging::*},
+    UI::{Accessibility::*, Input::KeyboardAndMouse::GetActiveWindow, WindowsAndMessaging::*},
   },
 };
 
@@ -187,9 +187,14 @@ fn refresh_titlebar_theme_color(hwnd: HWND, is_dark_mode: bool) {
           &dark_mode as *const BOOL as *const c_void,
           std::mem::size_of::<BOOL>() as u32,
         );
+        if GetActiveWindow() == hwnd {
+          DefWindowProcW(hwnd, WM_NCACTIVATE, None, None);
+          DefWindowProcW(hwnd, WM_NCACTIVATE, WPARAM(true.into()), None);
+        } else {
+          DefWindowProcW(hwnd, WM_NCACTIVATE, WPARAM(true.into()), None);
+          DefWindowProcW(hwnd, WM_NCACTIVATE, None, None);
+        }
       }
-      unsafe { DefWindowProcW(hwnd, WM_NCACTIVATE, None, None) };
-      unsafe { DefWindowProcW(hwnd, WM_NCACTIVATE, WPARAM(true.into()), None) };
     }
   }
 }