Class: Podoff::Document

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(s) ⇒ Document

Returns a new instance of Document.



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# File 'lib/podoff.rb', line 43

def initialize(s)

  fail ArgumentError.new('not a PDF file') \
    unless s.match(/\A%PDF-\d+\.\d+\n/)

  @header = []
  #
  @objs = {}
  cur = nil
  #
  @footer = nil

  s.split("\n").each do |l|

    if @footer
      @footer << l
    elsif m = /^(\d+ \d+) obj\b/.match(l)
      cur = (@objs[m[1]] = Obj.new(self, m[1]))
      cur << l
    elsif m = /^xref\b/.match(l)
      @footer = []
      @footer << l
    elsif cur
      cur << l
    else
      @header << l
    end
  end
end

Instance Attribute Details

Returns the value of attribute footer.



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# File 'lib/podoff.rb', line 41

def footer
  @footer
end

#header ⇒ Object (readonly)

Returns the value of attribute header.



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# File 'lib/podoff.rb', line 39

def header
  @header
end

#objs ⇒ Object (readonly)

Returns the value of attribute objs.



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# File 'lib/podoff.rb', line 40

def objs
  @objs
end

Instance Method Details

#dup ⇒ Object 



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# File 'lib/podoff.rb', line 81

def dup

  d0 = self

  d = d0.class.allocate

  d.instance_eval do
    @header = d0.header.dup
    @footer = d0.footer.dup
    @objs = d0.objs.values.inject({}) { |h, v| h[v.ref] = v.dup(d); h }
  end

  d
end

#fonts ⇒ Object 



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# File 'lib/podoff.rb', line 73

def fonts; @objs.values.select(&:is_font?); end

#page(i) ⇒ Object 



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# File 'lib/podoff.rb', line 76

def page(i)

  i < 1 ? nil : @objs.values.find { |o| o.page_number == i }
end

#pages ⇒ Object 



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# File 'lib/podoff.rb', line 74

def pages; @objs.values.select(&:is_page?); end

#write(path) ⇒ Object 



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# File 'lib/podoff.rb', line 96

def write(path)

  File.open(path, 'wb') do |f|

    @header.each { |l| f.print(l); f.print("\n") }

    @objs.values.each do |o|
      o.lines.each { |l| f.print(l); f.print("\n") }
    end

    @footer.each { |l| f.print(l); f.print("\n") }
  end
end