Change Details

Derivation: ``` y = sg.height() - (r.y() - sg.y() + r.height()) = sg.height() + sg.y() - s.y() - r.height(); ``` For more details, see D12452.

Derivation: ``` y = sg.height() - (r.y() - sg.y() + r.height()) = sg.height() + sg.y() - r.y() - r.height(); ``` For more details, see D12452.

Derivation: ``` y = sg.height() - (r.y() - sg.y() + r.height()) = sg.height() + sg.y() - sr.y() - r.height(); ``` For more details, see D12452.