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# frozen_string_literal: true
module Liquid
# @liquid_public_docs
# @liquid_type object
# @liquid_name forloop
# @liquid_summary
# Information about a parent [`for` loop](/api/liquid/tags#for).
class ForloopDrop < Drop
def initialize(name, length, parentloop)
@name = name
@length = length
@parentloop = parentloop
@index = 0
end
# @liquid_public_docs
# @liquid_name length
# @liquid_summary
# The total number of iterations in the loop.
# @liquid_return [number]
attr_reader :length
# @liquid_public_docs
# @liquid_name parentloop
# @liquid_summary
# The parent `forloop` object.
# @liquid_description
# If the current `for` loop isn't nested inside another `for` loop, then `nil` is returned.
# @liquid_return [forloop]
attr_reader :parentloop
def name
Usage.increment('forloop_drop_name')
@name
end
# @liquid_public_docs
# @liquid_summary
# The 1-based index of the current iteration.
# @liquid_return [number]
def index
@index + 1
end
# @liquid_public_docs
# @liquid_summary
# The 0-based index of the current iteration.
# @liquid_return [number]
def index0
@index
end
# @liquid_public_docs
# @liquid_summary
# The 1-based index of the current iteration, in reverse order.
# @liquid_return [number]
def rindex
@length - @index
end
# @liquid_public_docs
# @liquid_summary
# The 0-based index of the current iteration, in reverse order.
# @liquid_return [number]
def rindex0
@length - @index - 1
end
# @liquid_public_docs
# @liquid_summary
# Returns `true` if the current iteration is the first. Returns `false` if not.
# @liquid_return [boolean]
def first
@index == 0
end
# @liquid_public_docs
# @liquid_summary
# Returns `true` if the current iteration is the last. Returns `false` if not.
# @liquid_return [boolean]
def last
@index == @length - 1
end
protected
def increment!
@index += 1
end
end
end
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