Class: Libis::Format::Converter::PdfWatermarker

Inherits:
Base
  • Object
show all
Defined in:
lib/libis/format/converter/pdf_watermarker.rb

Constant Summary collapse

OPTIONS_TABLE = 
{
    file: 'wm_image',
    text: 'wm_text',
    rotation: 'wm_text_rotation',
    size: 'wm_font_size',
    opacity: 'wm_opacity',
    gap_size: 'wm_gap_size',
    gap_ratio: 'wm_gap_ratio'
}

Instance Attribute Summary

Attributes inherited from Base

#flags, #options

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

category, #check_file_exist, inherited, using_temp, #using_temp

Constructor Details

#initialize ⇒ PdfWatermarker

Returns a new instance of PdfWatermarker.



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 29

def initialize
  super
  @options[:text] = '© LIBIS'
  @options[:opacity] = '0.3'
end

Class Method Details

.input_types ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 16

def self.input_types
  [:PDF]
end

.output_types(format = nil) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 20

def self.output_types(format = nil)
  return [] unless input_types.include?(format) if format
  [:PDF]
end

Instance Method Details

#convert(source, target, format, opts = {}) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 63

def convert(source, target, format, opts = {})
  super

  result = convert_pdf(source, target)
  return nil unless result

  result

end

#convert_pdf(source, target) ⇒ Object

noinspection DuplicatedCode



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 83

def convert_pdf(source, target)

  using_temp(target) do |tmpname|
    result = Libis::Format::Tool::PdfCopy.run(
        source, tmpname,
        @options.map {|k, v|
          if v.nil?
            nil
          else
            v = v.split('\n') unless v.blank? if k == :text
            k = OPTIONS_TABLE[k] || k
            ["--#{k}", (v.is_a?(Array) ? v : v.to_s)]
          end}.compact.flatten
    )
    unless result[:err].empty?
      error("Pdf conversion encountered errors:\n%s", result[:err].join(join("\n")))
      next nil
    end
    tmpname
  end

end

#file(v) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 35

def file(v)
  @options[:file] = v.blank? ? nil : v
end

#gap_ratio(v) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 59

def gap_ratio(v)
  @options[:gap_ratio] = v
end

#gap_size(v) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 55

def gap_size(v)
  @options[:gap_size] = v
end

#opacity(v) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 51

def opacity(v)
  @options[:opacity] = v unless v.blank?
end

#pdf_watermark(_) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 25

def pdf_watermark(_)
  #force usage of this converter
end

#rotation(v) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 43

def rotation(v)
  @options[:rotation] = v unless v.blank?
end

#size(v) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 47

def size(v)
  @options[:size] = v unless v.blank?
end

#text(v) ⇒ Object 



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# File 'lib/libis/format/converter/pdf_watermarker.rb', line 39

def text(v)
  @options[:text] = v
end