Gets the gtk.TextIter at the start of the line containing
the coordinate y. y is in buffer coordinates, convert from
window coordinates with TextView.windowToBufferCoords.
If non-NULL, line_top will be filled with the coordinate of the top
edge of the line.
Gets the gtk.TextIter at the start of the line containing the coordinate y. y is in buffer coordinates, convert from window coordinates with TextView.windowToBufferCoords. If non-NULL, line_top will be filled with the coordinate of the top edge of the line.