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Contents
# See the Pagy documentation: https://ddnexus.github.io/pagy/docs/extras/size
# frozen_string_literal: true
class Pagy # :nodoc:
# Implement the legacy bar using the array size.
# Unless you have very specific requirements, use the faster and better looking default bar.
module SizeExtra
# Implements the old series algorithm
def series(size: @vars[:size], **_)
return super unless size.is_a?(Array)
return [] if size == []
raise VariableError.new(self, :size, 'to be an Array of 4 Integers or []', size) \
unless size.is_a?(Array) && size.size == 4 && size.all? { |num| !num.negative? rescue false } # rubocop:disable Style/RescueModifier
[].tap do |series|
# This algorithm is up to ~5x faster and ~2.3x lighter than the previous one (pagy < 4.3)
# However the behavior of the legacy nav bar was taken straight from WillPaginate and Kaminari:
# it's ill-concieved and complicates the experience of devs and users.
left_gap_start = 1 + size[0]
left_gap_end = @page - size[1] - 1
right_gap_start = @page + size[2] + 1
right_gap_end = @last - size[3]
left_gap_end = right_gap_end if left_gap_end > right_gap_end
right_gap_start = left_gap_start if left_gap_start > right_gap_start
start = 1
if (left_gap_end - left_gap_start).positive?
series.push(*start...left_gap_start, :gap)
start = left_gap_end + 1
end
if (right_gap_end - right_gap_start).positive?
series.push(*start...right_gap_start, :gap)
start = right_gap_end + 1
end
series.push(*start..@last)
series[series.index(@page)] = @page.to_s
end
end
end
prepend SizeExtra
end
Version data entries
20 entries across 20 versions & 1 rubygems