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# frozen_string_literal: true
module PDF
module Core
# Outline item.
#
# @api private
# @see # PDF 1.7 spec, section 8.2.2 Document Outline
class OutlineItem
# The total number of its open descendants at all lower levels of the
# outline hierarchy.
# @return [Integer]
attr_accessor :count
# The first of this item’s immediate children in the outline hierarchy.
# @return [Reference<PDF::Core::OutlineItem>]
attr_accessor :first
# The last of this item’s immediate children in the outline hierarchy.
# @return [Reference<PDF::Core::OutlineItem>]
attr_accessor :last
# The next item at this outline level.
# @return [Reference<PDF::Core::OutlineItem>]
attr_accessor :next
# The previous item at this outline level.
# @return [Reference<PDF::Core::OutlineItem>]
attr_accessor :prev
# The parent of this item in the outline hierarchy.
# @return [Reference<[PDF::Core::OutlineItem, PDF::Core::OutlineRoot]>]
attr_accessor :parent
# The text to be displayed on the screen for this item.
# @return [String]
attr_accessor :title
# The destination to be displayed when this item is activated.
# @return [String]
# @return [Symbol]
# @return [Array]
# @see Destinations
attr_accessor :dest
# Is this item open or closed.
# @return [Boolean]
attr_accessor :closed
# @param title [String]
# @param parent [PDF::Core::OutlineRoot, PDF::Core::OutlineItem]
# @param options [Hash]
# @option options :closed [Boolean]
def initialize(title, parent, options)
@closed = options[:closed]
@title = title
@parent = parent
@count = 0
end
# A hash representation of this outline item.
#
# @return [Hash]
def to_hash
hash = {
Title: title,
Parent: parent,
Count: closed ? -count : count,
}
[
{ First: first }, { Last: last }, { Next: defined?(@next) && @next },
{ Prev: prev }, { Dest: dest },
].each do |h|
unless h.values.first.nil?
hash.merge!(h)
end
end
hash
end
end
end
end
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