class TTY::Prompt::BlockPaginator
Public Instance Methods
paginate(list, active, per_page = nil, &block)
click to toggle source
Paginate list of choices based on current active choice. Move entire pages.
@api public
# File lib/tty/prompt/block_paginator.rb, line 12 def paginate(list, active, per_page = nil, &block) default_size = (list.size <= DEFAULT_PAGE_SIZE ? list.size : DEFAULT_PAGE_SIZE) @per_page = @per_page || per_page || default_size check_page_size! # Don't paginate short lists if list.size <= @per_page @start_index = 0 @end_index = list.size - 1 if block return list.each_with_index(&block) else return list.each_with_index.to_enum end end unless active.nil? # User may input index out of range @last_index = active end page = (@last_index / @per_page.to_f).ceil pages = (list.size / @per_page.to_f).ceil if page == 0 @start_index = 0 @end_index = @start_index + @per_page - 1 elsif page > 0 && page < pages @start_index = (page - 1) * @per_page @end_index = @start_index + @per_page - 1 elsif page == pages @start_index = (page - 1) * @per_page @end_index = list.size - 1 else @end_index = list.size - 1 @start_index = @end_index - @per_page + 1 end sliced_list = list[@start_index..@end_index] page_range = (@start_index..@end_index) return sliced_list.zip(page_range).to_enum unless block_given? sliced_list.each_with_index do |item, index| block[item, @start_index + index] end end