Merge pull request #17904 from josephsl/winUIGoodUIAWindowClassNames

Closes #17771
Partly closes #17407

Summary of the issue:
Mouse and touch interaction does not work in WinUI 3 apps such as Microsoft Copilot and parts of Windows 11 File Explorer interface.

Description of user facing changes
Mouse and touch interaction can be used in WinUI 3 apps.

Description of development approach
Added Microsoft.UI.Content.DesktopChildSiteBridge to good UIA window class names. An alternative approach is done through Mouse Enhancement add-on where NVDA will confess that WinUI 3 app elements are good UIA windows when the mentioned top-level pane window class is present.

Author: josephsl

source/UIAHandler/__init__.py

@@ -1,5 +1,5 @@
 # A part of NonVisual Desktop Access (NVDA)
-# Copyright (C) 2008-2023 NV Access Limited, Joseph Lee, Babbage B.V., Leonard de Ruijter, Bill Dengler
+# Copyright (C) 2008-2025 NV Access Limited, Joseph Lee, Babbage B.V., Leonard de Ruijter, Bill Dengler
 # This file is covered by the GNU General Public License.
 # See the file COPYING for more details.
 
@@ -88,6 +88,8 @@
 goodUIAWindowClassNames = (
 	# A WDAG (Windows Defender Application Guard) Window is always native UIA, even if it doesn't report as such.
 	"RAIL_WINDOW",
+	# #17407, #17771: WinUI 3 top-level pane window class name.
+	"Microsoft.UI.Content.DesktopChildSiteBridge",
 )
 
 badUIAWindowClassNames = (

user_docs/en/changes.md

@@ -10,6 +10,8 @@
 
 ### Bug Fixes
 
+* In WinUI 3 apps including Microsoft Copilot and parts of Windows 11 File Explorer, NVDA will no longer fail to announce controls when using mouse and touch interaction. (#17407, #17771, @josephsl)
+
 ### Changes for Developers
 
 Please refer to [the developer guide](https://www.nvaccess.org/files/nvda/documentation/developerGuide.html#API) for information on NVDA's API deprecation and removal process.