Class: PDF::Reader::Reference

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

Overview

An internal PDF::Reader class that represents an indirect reference to a PDF Object

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, gen) ⇒ Reference

Create a new Reference to an object with the specified id and revision number



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# File 'lib/pdf/reader/reference.rb', line 43

def initialize (id, gen)
  @id, @gen = id, gen
end

Instance Attribute Details

#gen ⇒ Object (readonly)

Returns the value of attribute gen.



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# File 'lib/pdf/reader/reference.rb', line 40

def gen
  @gen
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/pdf/reader/reference.rb', line 40

def id
  @id
end

Class Method Details

.from_buffer(buffer) ⇒ Object

check if the next token in the buffer is a reference, and return a PDF::Reader::Reference instance. Returns nil if the next token isn’t an indirect reference.



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# File 'lib/pdf/reader/reference.rb', line 33

def self.from_buffer (buffer)
  buffer.ready_token
  return nil unless m = buffer.raw.match(/^(\d+)\s+(\d+)\s+R\b/)
  buffer.head(m[0].size)
  self.new(m[1].to_i, m[2].to_i)
end

Instance Method Details

#to_a ⇒ Object

returns the current Reference object in an array with a single element



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# File 'lib/pdf/reader/reference.rb', line 48

def to_a
  [self]
end