Class: Pdfrb::Document::OutlineEntry

Inherits:
Object
  • Object
show all
Defined in:
lib/pdfrb/document/outline.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(title:, dest:, document:) ⇒ OutlineEntry

Returns a new instance of OutlineEntry.



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# File 'lib/pdfrb/document/outline.rb', line 71

def initialize(title:, dest:, document:)
  @title = title
  @dest = dest
  @document = document
  @children = []
  @value = {}
  @oid = nil
end

Instance Attribute Details

#children ⇒ Object (readonly)

Returns the value of attribute children.



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# File 'lib/pdfrb/document/outline.rb', line 68

def children
  @children
end

#dest ⇒ Object (readonly)

Returns the value of attribute dest.



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# File 'lib/pdfrb/document/outline.rb', line 68

def dest
  @dest
end

#oid ⇒ Object

Returns the value of attribute oid.



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# File 'lib/pdfrb/document/outline.rb', line 69

def oid
  @oid
end

#title ⇒ Object (readonly)

Returns the value of attribute title.



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# File 'lib/pdfrb/document/outline.rb', line 68

def title
  @title
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/pdfrb/document/outline.rb', line 68

def value
  @value
end

Instance Method Details

#add_child(entry) ⇒ Object 



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# File 'lib/pdfrb/document/outline.rb', line 80

def add_child(entry)
  @children << entry
  entry
end

#build!(document) ⇒ Object 



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# File 'lib/pdfrb/document/outline.rb', line 85

def build!(document)
  dict = document.add(
    {
      Title: @title,
      Parent: nil,
    },
    type: Pdfrb::Model::Cos::Dictionary
  )
  dict.value[:Dest] = @dest if @dest

  @oid = dict.oid
  @value = dict.value

  if @children.any?
    first_child = nil
    prev_child = nil
    @children.each do |child|
      child_ref = child.build!(document)
      child.value[:Parent] =
        Pdfrb::Model::Reference.new(dict.oid, dict.gen)
      child.value[:Prev] = prev_child.value ? Pdfrb::Model::Reference.new(prev_child.oid, 0) : nil if prev_child
      prev_child&.value&.[]=(:Next, Pdfrb::Model::Reference.new(child_ref.oid, 0))
      first_child ||= child_ref
      prev_child = child
    end
    dict.value[:First] = Pdfrb::Model::Reference.new(first_child.oid, 0)
    dict.value[:Last] = Pdfrb::Model::Reference.new(prev_child.oid, 0)
    dict.value[:Count] = @children.length
  end

  dict
end