Class: PdfParadise::CompressThisPdfFile

Inherits:
Base
  • Object
show all
Includes:
FileUtils::Verbose
Defined in:
lib/pdf_paradise/compress/compress_this_pdf_file.rb

Overview

PdfParadise::CompressThisPdfFile

Constant Summary

Constants inherited from Base

Base::NAMESPACE

Instance Method Summary collapse

Methods inherited from Base

#basename, #be_verbose?, #change_directory, #commandline_arguments?, #copy_file, #delete_file, #e, #ecomment, #esystem, #first_argument?, #gold, #infer_the_namespace, #input_without_leading_hyphens?, #internal_hash?, #is_an_image_file?, #is_on_roebe?, #lightsteelblue, #log_dir?, #mkdir, #mv, #n_pages?, #namespace?, #no_file_at, #opne, #opnn, #orange, #reset_the_internal_hash, #return_commandline_arguments_starting_with_hyphens, #return_files_from_the_commandline_arguments, #return_pwd, #rev, #set_be_quiet, #set_commandline_arguments, #steelblue, #try_to_ensure_that_this_directory_exists, #write_what_into

Constructor Details

#initialize(i = ARGV, run_already = true) ⇒ CompressThisPdfFile

#

initialize

#


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# File 'lib/pdf_paradise/compress/compress_this_pdf_file.rb', line 25

def initialize(
    i           = ARGV,
    run_already = true
  )
  reset
  set_commandline_arguments(i)
  run if run_already
end

Instance Method Details

#do_work_on_all_files(i = @work_on_these_files) ⇒ Object

#

do_work_on_all_files

#


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# File 'lib/pdf_paradise/compress/compress_this_pdf_file.rb', line 65

def do_work_on_all_files(
    i = @work_on_these_files
  )
  i.each {|this_file|
    store_into_this_file = 'compressed_PDF_file.pdf'
    cmd = "gs -sDEVICE=pdfwrite "\
          "-dCompatibilityLevel=#{@use_this_compatibility_level} "\
          "-dPDFSETTINGS=/#{@d_pdf_settings_value} "\
          "-dNOPAUSE -dQUIET -dBATCH "\
          "-sOutputFile=#{store_into_this_file} #{this_file}"
    e
    e "#{rev}The compressed .pdf file will be stored "\
      "here: #{sfile(store_into_this_file)}"
    e
    esystem cmd
    e
  } 
end

#reset ⇒ Object

#

reset (reset tag)

#


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# File 'lib/pdf_paradise/compress/compress_this_pdf_file.rb', line 37

def reset
  super()
  infer_the_namespace
  # ======================================================================= #
  # === @use_this_compatibility_level
  #
  # Note that -dCompatibilityLevel will be overridden by what is
  # chosen in -dPDFSETTINGS.
  #
  # Note that this refers to the PDF standard; 1.7 is fairly recent.
  # ======================================================================= #
  @use_this_compatibility_level = '1.7'
  # ======================================================================= #
  # === @d_pdf_settings_value
  # ======================================================================= #
  @d_pdf_settings_value = :screen # Or :prepress
end

#run ⇒ Object

#

run (run tag)

Note that using /ebook rather than /prepress would reduce the file size even further.

#


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# File 'lib/pdf_paradise/compress/compress_this_pdf_file.rb', line 90

def run
  set_work_on_these_files(commandline_arguments?)
  do_work_on_all_files
end

#set_work_on_these_files(i) ⇒ Object

#

set_work_on_these_files

#


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# File 'lib/pdf_paradise/compress/compress_this_pdf_file.rb', line 58

def set_work_on_these_files(i)
  @work_on_these_files = [i].flatten.compact
end