ResponsiveExpression does not support non-FrameworkElement, like TextBlock>Run

[Xiaoy312]

Current behavior

^ title

Expected behavior

should be supported

How to reproduce it (as minimally and precisely as possible)

<TextBlock Text="{utu:Responsive Normal=ok, Wide=ok}" />
<TextBlock><Run Text="{utu:Responsive Normal=not_ok, Wide=not_ok}" /></TextBlock>

Anything else we need to know?

beside descendants of Inline family, we should probably try to identify more scenarios where this can fail too.

[Xiaoy312]

candidates to support:

• (Row|Column)Definition
• Inlines
• to add...

[Xiaoy312]

ItemsRepeater::Layout

[Xiaoy312]

new contract: // we are moving away from the ResponsiveBehavior::IsEnabled approach

<TextBlock x:Name="TestText">
	<Run Text="{utu:Responsive Source={Binding ElementName=TestText}, Narrow='Narrow', Wide='Wide'}" />

edit: with IRootObjectProvider we no longer need a proxy host (Source) or ResponsiveBehavior.IsEnabled as workarounds