class Chamomile::Paginator

# File lib/chamomile/components/paginator.rb, line 12
def initialize(total_pages: 1, per_page: 0, type: TYPE_DOT, key_map: DEFAULT_KEY_MAP)
  @total_pages = [total_pages, 1].max
  @per_page = [per_page, 0].max
  @type = type
  @key_map = key_map
  @active_dot = "\u25cf"   # ●
  @inactive_dot = "\u25cb" # ○
  @page = 0
end

# File lib/chamomile/components/paginator.rb, line 75
def handle(msg)
  case msg
  when Chamomile::KeyEvent
    if KeyBinding.key_matches?(msg, @key_map, :prev_page)
      prev_page
    elsif KeyBinding.key_matches?(msg, @key_map, :next_page)
      next_page
    end
  end

  nil
end

# File lib/chamomile/components/paginator.rb, line 42
def next_page
  self.page = @page + 1
  self
end

# File lib/chamomile/components/paginator.rb, line 47
def on_first_page?
  @page.zero?
end

# File lib/chamomile/components/paginator.rb, line 51
def on_last_page?
  @page >= @total_pages - 1
end

# File lib/chamomile/components/paginator.rb, line 24
def page=(p)
  @page = p.clamp(0, [@total_pages - 1, 0].max)
end

# File lib/chamomile/components/paginator.rb, line 33
def per_page=(n)
  @per_page = [n, 0].max
end

# File lib/chamomile/components/paginator.rb, line 37
def prev_page
  self.page = @page - 1
  self
end

# File lib/chamomile/components/paginator.rb, line 56
def slice_bounds(total_items)
  return [0, 0] if @per_page <= 0 || total_items <= 0

  start = @page * @per_page
  start = [start, total_items].min
  length = [@per_page, total_items - start].min
  [start, length]
end

# File lib/chamomile/components/paginator.rb, line 28
def total_pages=(n)
  @total_pages = [n, 1].max
  @page = @page.clamp(0, @total_pages - 1)
end

# File lib/chamomile/components/paginator.rb, line 66
def total_pages_from_items(total_items)
  return if @per_page <= 0

  @total_pages = [(total_items.to_f / @per_page).ceil, 1].max
  @page = @page.clamp(0, @total_pages - 1)
end

# File lib/chamomile/components/paginator.rb, line 90
def view
  case @type
  when TYPE_ARABIC
    "#{@page + 1}/#{@total_pages}"
  else
    (0...@total_pages).map { |i| i == @page ? @active_dot : @inactive_dot }.join(" ")
  end
end