Class: PDF::Core::Reference

Inherits:
Object
  • Object
show all
Defined in:
lib/pdf/core/reference.rb

Overview

:nodoc:

Defined Under Namespace

Classes: CannotAttachStream

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, data) ⇒ Reference

Returns a new instance of Reference.



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# File 'lib/pdf/core/reference.rb', line 22

def initialize(id, data)
  @identifier = id
  @gen        = 0
  @data       = data
  @stream     = Stream.new
end

Instance Attribute Details

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/pdf/core/reference.rb', line 14

def data
  @data
end

#gen ⇒ Object

Returns the value of attribute gen.



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# File 'lib/pdf/core/reference.rb', line 14

def gen
  @gen
end

#identifier ⇒ Object

Returns the value of attribute identifier.



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# File 'lib/pdf/core/reference.rb', line 14

def identifier
  @identifier
end

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'lib/pdf/core/reference.rb', line 14

def offset
  @offset
end

#stream ⇒ Object

Returns the value of attribute stream.



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# File 'lib/pdf/core/reference.rb', line 14

def stream
  @stream
end

Instance Method Details

#<<(io) ⇒ Object 



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# File 'lib/pdf/core/reference.rb', line 41

def <<(io)
  unless @data.is_a?(::Hash)
    raise CannotAttachStream
  end

  (@stream ||= Stream.new) << io
end

#deep_copy(share = []) ⇒ Object

Creates a deep copy of this ref. If share is provided, shares the given dictionary entries between the old ref and the new.



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# File 'lib/pdf/core/reference.rb', line 56

def deep_copy(share = [])
  r = dup

  case r.data
  when ::Hash
    # Copy each entry not in +share+.
    (r.data.keys - share).each do |k|
      r.data[k] = Utils.deep_clone(r.data[k])
    end
  when PDF::Core::NameTree::Node
    r.data = r.data.deep_copy
  else
    r.data = Utils.deep_clone(r.data)
  end

  r.stream = Utils.deep_clone(r.stream)
  r
end

#object ⇒ Object 



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# File 'lib/pdf/core/reference.rb', line 29

def object
  output = +"#{@identifier} #{gen} obj\n"
  if @stream.empty?
    output << PDF::Core.pdf_object(data) << "\n"
  else
    output << PDF::Core.pdf_object(data.merge(@stream.data)) <<
      "\n" << @stream.object
  end

  output << "endobj\n"
end

#replace(other_ref) ⇒ Object

Replaces the data and stream with that of other_ref.



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# File 'lib/pdf/core/reference.rb', line 76

def replace(other_ref)
  @data   = other_ref.data
  @stream = other_ref.stream
end

#to_s ⇒ Object 



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# File 'lib/pdf/core/reference.rb', line 49

def to_s
  "#{@identifier} #{gen} R"
end