package tui

type ScrollState struct {
	at string
	offset int
	absolute int
	atFirst bool
	atLast bool
	NoSnap bool
}

func (s *ScrollState) ToStart() {
	*s = ScrollState {}
}

func (s *ScrollState) AtFirst() bool {
	return s.atFirst
}

func (s *ScrollState) AtLast() bool {
	return s.atLast
}

func (s *ScrollState) Scroll(amnt int) {
	s.offset += amnt
	s.absolute += amnt
}

func (s *ScrollState) To(id string) {
	s.at = id
}

func (s *ScrollState) ByMouse(ev MouseEvent, reverse bool) {
	scroll := ev.Scroll * 5
	if reverse {
		scroll *= -1
	}
	s.Scroll(scroll)
}

func (s *ScrollState) Get() int {
	return s.absolute
}

func (s *ScrollState) Set(amnt int) {
	s.at = ""
	s.absolute = amnt
}