Class: PDF::Reader::Encoding

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

Defined Under Namespace

Classes: IdentityH, MacExpertEncoding, MacRomanEncoding, StandardEncoding, SymbolEncoding, WinAnsiEncoding, ZapfDingbatsEncoding

Constant Summary collapse

UNKNOWN_CHAR =

▯

0x25AF

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#differences ⇒ Object

Returns the value of attribute differences.



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

def differences
  @differences
end

Class Method Details

.factory(enc) ⇒ Object

Takes the “Encoding” value of a Font dictionary and builds a PDF::Reader::Encoding object



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# File 'lib/pdf/reader/encoding.rb', line 61

def self.factory(enc)
  if enc.kind_of?(Hash)
    diff = enc[:Differences]
    enc = enc[:Encoding] || enc[:BaseEncoding]
  elsif enc != nil
    enc = enc.to_sym
  end

  case enc
    when nil                   then enc = PDF::Reader::Encoding::StandardEncoding.new
    when "Identity-H".to_sym   then enc = PDF::Reader::Encoding::IdentityH.new
    when :MacRomanEncoding     then enc = PDF::Reader::Encoding::MacRomanEncoding.new
    when :MacExpertEncoding    then enc = PDF::Reader::Encoding::MacExpertEncoding.new
    when :StandardEncoding     then enc = PDF::Reader::Encoding::StandardEncoding.new
    when :SymbolEncoding       then enc = PDF::Reader::Encoding::SymbolEncoding.new
    when :WinAnsiEncoding      then enc = PDF::Reader::Encoding::WinAnsiEncoding.new
    when :ZapfDingbatsEncoding then enc = PDF::Reader::Encoding::ZapfDingbatsEncoding.new
    else raise UnsupportedFeatureError, "#{enc} is not currently a supported encoding"
  end

  enc.differences = diff if enc && diff

  return enc
end

Instance Method Details

#to_utf8(str, tounicode = nil) ⇒ Object

Raises:

  • (RuntimeError) 


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# File 'lib/pdf/reader/encoding.rb', line 86

def to_utf8(str, tounicode = nil)
  # abstract method, of sorts
  raise RuntimeError, "Called abstract method"
end