Class: Libis::Format::Tool::PdfToPdfa

Inherits:
Object
  • Object
show all
Includes:
Tools::Logger
Defined in:
lib/libis/format/tool/pdf_to_pdfa.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.installed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/libis/format/tool/pdf_to_pdfa.rb', line 21

def self.installed?
  result = Libis::Tools::Command.run(Libis::Format::Config[:ghostscript_cmd])
  result.zero?
end

.run(source, target = nil, **options) ⇒ Object 



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# File 'lib/libis/format/tool/pdf_to_pdfa.rb', line 26

def self.run(source, target = nil, **options)
  new.run source, target, **options
end

Instance Method Details

#run(source, target = nil, **options) ⇒ Object 



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# File 'lib/libis/format/tool/pdf_to_pdfa.rb', line 30

def run(source, target = nil, **options)
  tmp_target = Tools::TempFile.name(File.basename(source, '.*'), '.pdf')
  target ||= tmp_target

  metadata = get_metadata(source)

  icc_info = icc_options(options[:colorspace])

  icc_file = Tools::TempFile.name(icc_info[:icc_name], '.icc')
  FileUtils.cp(File.join(Libis::Format::DATA_DIR, "#{icc_info[:icc_name]}.icc"), icc_file)

  def_filename = Tools::TempFile.name('PDFA_def', '.ps')
  File.open(def_filename, 'w') do |f|
    f.puts File.read(File.join(Libis::Format::DATA_DIR, 'PDFA_def.ps'))
               .gsub('[**ICC profile**]', icc_file)
               .gsub('[**ICC reference**]', icc_info[:icc_ref])
               .gsub('[**METADATA**]', metadata)
  end

  timeout = Libis::Format::Config[:timeouts][:pdf_to_pdfa]
  result = Libis::Tools::Command.run(
    Libis::Format::Config[:ghostscript_cmd],
    '-q',
    '-dBATCH', '-dNOPAUSE', '-dNOOUTERSAVE', '-dNOSAFER',
    # "-dNOPLATFONTS", "-dUseCIEColor=true",
    # "-sColorConversionStrategy=/UseDeviceIndependentColor",
    "-sProcessColorModel=#{icc_info[:device]}",
    "-sOutputICCProfile=#{icc_file}",
    '-dCompatibilityLevel=1.4',
    '-sDEVICE=pdfwrite', '-dPDFA=1', '-dPDFACompatibilityPolicy=1',
    '-o', File.absolute_path(target),
    def_filename,
    source,
    timeout:,
    kill_after: timeout * 2
  )

  result[:err] << "#{self.class} took too long (> #{timeout} seconds) to complete" if result[:timeout]

  FileUtils.rm [icc_file, def_filename].compact, force: true

  result
end