Summary

Our TermControlUiaProvider (aka ScreenInfoUiaProvider) assumes that a retrieved selection is always a line selection.

Technical Details

ScreenInfoUiaProviderBase::GetSelection() returns a UiaTextRange for the endpoints of the selection (after a brief inclusive/exclusive conversion). We need two modifications here:

1. ScreenInfoUiaProviderBase should check if the selection is a box selection or a line selection. And should create a different branch for each of those options.
2. UiaTextRangeBase needs...

• a constructor for a box selection UTR
• a flag to know if it is in this style
• a new bounding rect for a UTR of this style
• a modified way to retrieve text for this
• (?) modify Select to make a box selection? not needed. How selections are made is already abstracted to the selection code, not UIA providers