Class: Slippery::Processors::GraphvizDot
- Inherits:
-
Object
- Object
- Slippery::Processors::GraphvizDot
- Defined in:
- lib/slippery/processors/graphviz_dot.rb
Overview
Turn embedded dot files into embedded SVGs
Class Method Summary collapse
Instance Method Summary collapse
- #call(doc) ⇒ Object
- #copy_width_height(node) ⇒ Object
- #create_svg_from_dot ⇒ Object
- #dot_to_hexp(dot_source) ⇒ Object
-
#initialize(selector = '.language-dot') ⇒ GraphvizDot
constructor
A new instance of GraphvizDot.
Constructor Details
#initialize(selector = '.language-dot') ⇒ GraphvizDot
Returns a new instance of GraphvizDot.
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# File 'lib/slippery/processors/graphviz_dot.rb', line 7 def initialize(selector = '.language-dot') @selector = selector end |
Class Method Details
.call(doc) ⇒ Object
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# File 'lib/slippery/processors/graphviz_dot.rb', line 11 def self.call(doc) self.new.call(doc) end |
Instance Method Details
#call(doc) ⇒ Object
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# File 'lib/slippery/processors/graphviz_dot.rb', line 15 def call(doc) doc .rewrite(@selector, &create_svg_from_dot) .rewrite('polygon[fill=white][stroke=white]') { [] } end |
#copy_width_height(node) ⇒ Object
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# File 'lib/slippery/processors/graphviz_dot.rb', line 34 def copy_width_height(node) ->(svg) do return svg unless node[:width] || node[:height] [:width, :height].each do |attr| svg = svg.remove_attr(attr) svg = svg.attr(attr, node[attr]) if node[attr] end svg end end |
#create_svg_from_dot ⇒ Object
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# File 'lib/slippery/processors/graphviz_dot.rb', line 21 def create_svg_from_dot ->(node) do dot_to_hexp(node.text).process(copy_width_height(node)) end end |
#dot_to_hexp(dot_source) ⇒ Object
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# File 'lib/slippery/processors/graphviz_dot.rb', line 27 def dot_to_hexp(dot_source) file = Tempfile.new(['slippery','.dot']) file << dot_source file.close Hexp.parse(`dot #{file.path} -Tsvg`) end |