Module: Rabbit::Parser::Ext::BlockDiag

Includes:
GetText
Defined in:
lib/rabbit/parser/ext/blockdiag.rb

Constant Summary collapse

AVAILABLE_FLAG_OPTIONS =
["antialias"]
AVAILABLE_VALUE_OPTIONS =

“font” is treated as specially.

[]

Constants included from GetText

GetText::DOMAIN

Class Method Summary collapse

Methods included from GetText

included

Class Method Details

.find_font(prop) ⇒ Object


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# File 'lib/rabbit/parser/ext/blockdiag.rb', line 37

def find_font(prop)
  font = prop["font"]
  return font if font and File.exist?(font)
  fonts = prop["fonts"]
  return nil if fonts.nil?
  fonts = fonts.split(/\s*,\s*/) if fonts.is_a?(String)
  fonts.find do |font|
    File.exist?(font)
  end
end

.make_image(path, prop, logger) ⇒ Object


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# File 'lib/rabbit/parser/ext/blockdiag.rb', line 11

def make_image(path, prop, logger)
  image_file = Tempfile.new("rabbit-image-blockdiag")
  command = [
    "blockdiag",
    "-T", "svg",
    "-o", image_file.path,
  ]
  font = find_font(prop)
  command.concat(["-f", font]) if font
  AVAILABLE_FLAG_OPTIONS.each do |name|
    command << "--#{name}" if /\A(?:true|yes)\z/i =~ prop[name].to_s
  end
  AVAILABLE_VALUE_OPTIONS.each do |name|
    command.concat(["--#{name}", prop[name]]) if prop.has_key?(name)
  end
  command << path
  if SystemRunner.run(*command)
    image_file
  else
    format = _("tried blockdiag command: %s")
    additional_info = format % command.inspect
    raise BlockDiagCanNotHandleError.new(command.join(' '),
                                         additional_info)
  end
end