Class: Origami::PDF::Header

Inherits:
Object
  • Object
show all
Defined in:
lib/origami/header.rb

Overview

Class representing a PDF Header.

Constant Summary collapse

MAGIC = 
/%PDF-(?<major>\d+)\.(?<minor>\d+)/

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(major_version = 1, minor_version = 4) ⇒ Header

Creates a file header, with the given major and minor versions.

major_version

Major PDF version, must be 1.

minor_version

Minor PDF version, must be between 0 and 7.



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# File 'lib/origami/header.rb', line 39

def initialize(major_version = 1, minor_version = 4)
  @major_version, @minor_version = major_version, minor_version
end

Instance Attribute Details

#major_version ⇒ Object

Returns the value of attribute major_version.



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# File 'lib/origami/header.rb', line 32

def major_version
  @major_version
end

#minor_version ⇒ Object

Returns the value of attribute minor_version.



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# File 'lib/origami/header.rb', line 32

def minor_version
  @minor_version
end

Class Method Details

.parse(stream) ⇒ Object

:nodoc:



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# File 'lib/origami/header.rb', line 43

def self.parse(stream) # :nodoc:
  scanner = Parser.init_scanner(stream)

  if scanner.scan(MAGIC).nil?
    raise InvalidHeaderError, "Invalid header format : #{scanner.peek(15).inspect}"
  else
    maj = scanner['major'].to_i
    min = scanner['minor'].to_i
  end

  scanner.skip(REGEXP_WHITESPACES)

  PDF::Header.new(maj, min)
end

Instance Method Details

#to_s(eol: $/) ⇒ Object

Outputs self into PDF code.



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# File 'lib/origami/header.rb', line 68

def to_s(eol: $/)
  "%PDF-#{version}".b + eol
end

#version ⇒ Object

Returns the Header version as a String.



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# File 'lib/origami/header.rb', line 61

def version
  "#{@major_version}.#{@minor_version}"
end