Class: Asciidoctor::Diagram::DitaaConverter

Inherits:
Object
  • Object
show all
Includes:
DiagramConverter
Defined in:
lib/asciidoctor-diagram/ditaa/converter.rb

Constant Summary collapse

OPTIONS = 
{
    :scale => lambda { |o, v| o << '--scale' << v if v },
    :tabs => lambda { |o, v| o << '--tabs' << v if v },
    :background => lambda { |o, v| o << '--background' << v if v },
    :antialias => lambda { |o, v| o << '--no-antialias' if v == 'false' },
    :separation => lambda { |o, v| o  << '--no-separation' if v == 'false'},
    :round_corners => lambda { |o, v| o  << '--round-corners' if v == 'true'},
    :shadows => lambda { |o, v| o  << '--no-shadows' if v == 'false'},
    :debug => lambda { |o, v| o  << '--debug' if v == 'true'},
    :fixed_slope => lambda { |o, v| o  << '--fixed-slope' if v == 'true'},
    :transparent => lambda { |o, v| o  << '--transparent' if v == 'true'},
    :bullet_characters => lambda { |o, v| o  << '--bullet-characters' << v if v }
}
CLASSPATH_ENV = 
Java.environment_variable('DIAGRAM_DITAA_CLASSPATH')
DITAA_JARS = 
if CLASSPATH_ENV
  CLASSPATH_ENV.split(File::PATH_SEPARATOR)
else
  begin
    require 'asciidoctor-diagram/ditaa/classpath'
    ::Asciidoctor::Diagram::DitaaClasspath::JAR_FILES
  rescue LoadError
    nil
  end
end

Instance Method Summary collapse

Methods included from DiagramConverter

#wrap_source

Instance Method Details

#collect_options(source) ⇒ Object 



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# File 'lib/asciidoctor-diagram/ditaa/converter.rb', line 48

def collect_options(source)
  options = {}
  
  OPTIONS.keys.each do |option|
    attr_name = option.to_s.tr('_', '-')
    options[option] = source.attr(attr_name) || source.attr(attr_name, nil, 'ditaa-option')
  end
  
  options
end

#convert(source, format, options) ⇒ Object 



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# File 'lib/asciidoctor-diagram/ditaa/converter.rb', line 63

def convert(source, format, options)
  return source.to_s if format == :txt

  unless DITAA_JARS
    raise "Could not load Ditaa. Either require 'asciidoctor-diagram-ditaamini' or specify the location of the Ditaa JAR(s) using the 'DIAGRAM_DITAA_CLASSPATH' environment variable."
  end

  Java.load

  flags = []

  options.each do |option, value|
    OPTIONS[option].call(flags, value)
  end

  options_string = flags.join(' ')

  case format
  when :png
    mime_type = 'image/png'
  when :svg
    mime_type = 'image/svg+xml'
  else
    raise "Unsupported format: #{format}"
  end

  headers = {
      'Accept' => mime_type,
      'X-Options' => options_string
  }

  response = Java.send_request(
      :url => '/ditaa',
      :body => source.to_s,
      :headers => headers
  )

  unless response[:code] == 200
    raise Java.create_error("Ditaa image generation failed", response)
  end

  response[:body]
end

#native_scaling? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asciidoctor-diagram/ditaa/converter.rb', line 59

def native_scaling?
  true
end

#supported_formats ⇒ Object 



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# File 'lib/asciidoctor-diagram/ditaa/converter.rb', line 44

def supported_formats
  [:png, :svg, :txt]
end