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Versions: 8
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Contents
# frozen_string_literal: true
require_relative 'paginator'
module TTY
class Prompt
class BlockPaginator < Paginator
# Paginate list of choices based on current active choice.
# Move entire pages.
#
# @api public
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
end # EnumPaginator
end # Prompt
end # TTY
Version data entries
8 entries across 8 versions & 2 rubygems