Class: RPDF::CrossRefTable

Inherits:
Object
  • Object
show all
Defined in:
lib/rpdf/crossreftable.rb

Overview

Cross-Reference Table This implementation uses only one cross-reference section and no free entries.

PDFRef15 p69

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CrossRefTable

Returns a new instance of CrossRefTable.



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# File 'lib/rpdf/crossreftable.rb', line 9

def initialize
  @hash = Hash.new
end

Instance Method Details

#addUsedEntry(position, objectnumber) ⇒ Object 



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# File 'lib/rpdf/crossreftable.rb', line 13

def addUsedEntry(position, objectnumber)
  @hash[objectnumber] = position
end

#size ⇒ Object 



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# File 'lib/rpdf/crossreftable.rb', line 17

def size
  @hash.size + 1
end

#to_pdf ⇒ Object 



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# File 'lib/rpdf/crossreftable.rb', line 21

def to_pdf
  bytes = "xref\n"
  bytes << "0 #{size}\n"
  bytes << "0000000000 65535 f \n"
  @hash.keys.sort.each { |objectnumber|
    bytes << ("%010d" % @hash[objectnumber]) << " 00000 n \n"
  }
  bytes << "\n"
end