UIAutomation: ITransformPattern2

[dotMorten]

⚠️ Work in progress

Fixes #10847

Description

Adds the ITransformProvider2 pattern that allows UI Automation / Accessibility tooling to zoom.

TODO: Use the Microsoft UI Automation Component Object Model (COM) interfaces instead to call the new TransformPattern2 methods in uiautomationcoreapi.h, since the new APIs doesn't support the old p-invoke methods which are deprecated.

wpf/src/Microsoft.DotNet.Wpf/src/UIAutomation/UIAutomationClient/MS/Internal/Automation/UiaCoreApi.cs

Lines 1350 to 1354 in e786186

	[DllImport(DllImport.UIAutomationCore, EntryPoint = "TransformPattern2_Zoom", CharSet = CharSet.Unicode)]
	private static extern int RawTransformPattern2_Zoom(SafePatternHandle hobj, double degrees); // TODO: Needs to use Microsoft UI Automation Component Object Model (COM) interfaces instead.
	[DllImport(DllImport.UIAutomationCore, EntryPoint = "TransformPattern2_ZoomByUnit", CharSet = CharSet.Unicode)]
	private static extern int RawTransformPattern2_ZoomByUnit(SafePatternHandle hobj, ZoomUnit unit); // TODO: Needs to use Microsoft UI Automation Component Object Model (COM) interfaces instead.

Reference:

• https://learn.microsoft.com/en-us/windows/win32/api/uiautomationclient/nf-uiautomationclient-iuiautomationtransformpattern2-zoom
• https://learn.microsoft.com/en-us/windows/win32/api/uiautomationclient/nf-uiautomationclient-iuiautomationtransformpattern2-zoombyunit

Customer Impact

Allows creating more accessible applications.

Testing

Risk

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 54 lines in your changes missing coverage. Please review.

Project coverage is 13.37189%. Comparing base (28843aa) to head (e786186).
Report is 18 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@ ## main #10953 +/- ## =================================================== - Coverage 13.52892% 13.37189% -0.15703%  =================================================== Files 3319 3321 +2 Lines 664894 664947 +53 Branches 74674 74674 =================================================== - Hits 89953 88916 -1037  - Misses 572398 573493 +1095  + Partials 2543 2538 -5 

Flag	Coverage Δ
Debug	13.37189% <0.00000%> (-0.15703%)	⬇️

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[wjk]

Unintended change?