gtk-text-iter-forward-visible-line (iter)

iter -- a gtk-text-iter instance

A boolean whether the iterator can be dereferenced.

Moves the iterator to the start of the next visible line. Returns true if there was a next line to move to, and false if the iterator was simply moved to the end of the text buffer and is now not dereferenceable, or if the iterator was already at the end of the text buffer.