I have a polygon with holes where I’d like to remove the small corner.

The original polygon:

As shown the white part are holes. While the corner in the red circle should be removed. There are two types of corners in the example: A and B. For corner A, the coordinate should be re-calculated, and for corner B, the vertices should be removed.

This is the expected result:

1 Is there a terminology for this kind of processing ?

2 If not, any idea for design the algorithm ?