Class: Mathtype::EpsFileParser

Inherits:
FileParser show all
Defined in:
lib/mathtype-0.0.7.5/lib/file_parser/eps.rb

Constant Summary

Constants inherited from FileParser

FileParser::A64

Instance Attribute Summary

Attributes inherited from FileParser

#equation, #raw

Instance Method Summary collapse

Methods inherited from FileParser

#checksum, #decode, #encode, #read_from_file

Constructor Details

#initialize(path) ⇒ EpsFileParser

Returns a new instance of EpsFileParser.



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# File 'lib/mathtype-0.0.7.5/lib/file_parser/eps.rb', line 3

def initialize(path)
  super(path)
  extract_mtef_from_epscomment(@raw)
end

Instance Method Details

#extract_mtef_from_epscomment(comment) ⇒ Object 



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# File 'lib/mathtype-0.0.7.5/lib/file_parser/eps.rb', line 8

def extract_mtef_from_epscomment(comment)
  string64 = @raw.gsub /\r/, ""
  # d for delimiter
  d = string64[(/MathType(.)MTEF\1/ =~ string64) + 8]
  matches = string64.match /.*MathType#{d}MTEF#{d}(.)#{d}(.)#{d}(.)(.)(.*)#{d}([0-9A-F]{4})#{d}.*/m
  leading_chrs = matches[1].to_i
  trailing_chrs = matches[2].to_i - 1
  a64_chr1 = matches[3]
  a64_chr2 = matches[4]
  A64[a64_chr1] = 62
  A64[a64_chr2] = 63
  A64[62] = a64_chr1
  A64[63] = a64_chr2
  string64   = matches[5]
  mtchecksum = matches[6]
  string64.gsub! /.{#{trailing_chrs}}(\n).{#{leading_chrs}}/m, ""
  @equation = decode string64
  unless checksum == mtchecksum
    raise ArgumentError, "Checksums do not match, expected #{mtchecksum} but got #{checksum}"
  end
end