Class: GraphVizML

Inherits:
Object
  • Object
show all
Defined in:
lib/graphvizml.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(obj = nil, debug: false, fill: 'transparent', stroke: '#000', text_color: '#000') ⇒ GraphVizML

Returns a new instance of GraphVizML.



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# File 'lib/graphvizml.rb', line 33

def initialize(obj=nil, debug: false, fill: 'transparent', stroke: '#000', text_color: '#000')

  @debug = debug
  @fill, @stroke, @text_color = fill, stroke, text_color

  if obj then


    xml = if obj.is_a? Rexle or obj.is_a? Rexle::Element

      obj.xml

    else

      s = RXFHelper.read(obj).first

      if  s =~ /<\?graphvizml\b/ then

        import_string s

      else

        if @debug then
          #File.write '/tmp/graphviz.xml', xml
          puts('graphvizml xml: ' + s.inspect)
        end

        s

      end

    end

    @g = build_from_nodes Domle.new(xml)

  end

  @css = "
    .node ellipse {stroke: #{stroke}; fill: #{fill}}
    .node text {fill: #{text_color}}
    .edge path {stroke: #{stroke}}
    .edge polygon {stroke: #{stroke}; fill: #{stroke}}
  "

end

Instance Attribute Details

#css ⇒ Object

Returns the value of attribute css.



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# File 'lib/graphvizml.rb', line 30

def css
  @css
end

#fill ⇒ Object

Returns the value of attribute fill.



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# File 'lib/graphvizml.rb', line 30

def fill
  @fill
end

#g ⇒ Object (readonly)

Returns the value of attribute g.



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# File 'lib/graphvizml.rb', line 31

def g
  @g
end

#stroke ⇒ Object

Returns the value of attribute stroke.



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# File 'lib/graphvizml.rb', line 30

def stroke
  @stroke
end

#text_color ⇒ Object

Returns the value of attribute text_color.



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# File 'lib/graphvizml.rb', line 30

def text_color
  @text_color
end

Instance Method Details

#import(obj) ⇒ Object 



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# File 'lib/graphvizml.rb', line 79

def import(obj)

  s = RXFReader.read(obj).first
  xml = import_string s
  puts('graphvizml/import xml: ' + xml.inspect).debug if @debug
  @g = build_from_nodes Domle.new(xml)
  self

end

#to_dot ⇒ Object 



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# File 'lib/graphvizml.rb', line 90

def to_dot()

  @g.to_dot

end

#to_svg ⇒ Object

returns an SVG blob



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# File 'lib/graphvizml.rb', line 99

def to_svg()
  f = Tempfile.new('graphvizml')
  #jr 26-01-2022 Graphviz::output(@g, format: 'svg', path: f.path)
  Graphviz.output(@g, path: f.path, format: 'svg')
  s = File.read f.path
  #s.sub!('xmlns:xlink="http://www.w3.org/1999/xlink"','')
  #s.sub!('xlink:','') # not yet implemented because of a local namespace issue
  s.lines.insert(8, css_code()).join
end