ink annotation passes page boarder

Hello. I have a question with ink annotation. I want not allow ink annotaion passes page boarder. When annotation crosses border it should be drawing along boarder(you can see it in attachments). How can i do it?

it seems we can't limit touch moving position.
but, i think we can clip page bounding on canvas, when drawing Ink.
it may make canvas drawing slower, because of clip operation.

if you care using PDFGLLayoutView, you need to get coordinate of m_annot_page in GLView class.