Class: Jekyll::Diagrams::GraphvizBlock

Inherits:
Block
  • Object
show all
Defined in:
lib/jekyll-diagrams/graphviz.rb

Constant Summary collapse

CONFIGRATIONS = 
{
  'K' => 'default_layout',
  'G' => 'graph_attributes',
  'N' => 'node_attributes',
  'E' => 'edge_attributes'
}.freeze

Instance Method Summary collapse

Methods inherited from Block

#read_config, #render, #wrap_class

Methods included from Util

#config_for, #diagrams_config, #vendor_path

Methods included from Renderer

#render_with_command, #render_with_stdin, #render_with_stdin_stdout, #render_with_stdout, #render_with_tempfile

Instance Method Details

#build_command(config) ⇒ Object 



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/jekyll-diagrams/graphviz.rb', line 18

def build_command(config)
  command = 'dot -Tsvg'

  CONFIGRATIONS.each do |prefix, conf|
    next unless config.has_key?(conf)

    attrs = config[conf]

    attrs = case attrs
    when String
      attrs
    when Array
      attrs.join(" -#{prefix}")
    when Hash
      attrs.map { |k, v| "#{k}=#{v}" }.join(" -#{prefix}")
    end

    command << " -#{prefix}#{attrs}"
  end

  command
end

#render_svg(code, config) ⇒ Object 



11
12
13
14
15
16
 
# File 'lib/jekyll-diagrams/graphviz.rb', line 11

def render_svg(code, config)
  command = build_command(config)

  svg = render_with_stdin_stdout(command, code)
  svg.sub!(/^<\?xml(([^>]|\n)*>\n?){2}/, '')
end