Class: SyntaxTreeAsDotGraph

Inherits:
DotGraphPrinter show all
Defined in:
lib/rpdf2txt-rockit/graphdrawing.rb

Instance Method Summary collapse

Methods inherited from DotGraphPrinter

#initialize, #to_graph

Constructor Details

This class inherits a constructor from DotGraphPrinter

Instance Method Details



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# File 'lib/rpdf2txt-rockit/graphdrawing.rb', line 54

def add_parent_link(parent, child, label = nil, weight = nil)
  if parent
    @links[[parent, child]] = 
	"#{parent.id} -> #{child.id}"
    if label or weight
	@links[[parent, child]] += " [" +
 (label ? "label=#{label.inspect}" : "") +
 ((label and weight) ? "," : "") +
 (weight ? "weight=#{weight.inspect}" : "") +
 "]"
    end
  end
end

#eval_to_dot(ast, parent = nil, linkname = nil, weight = nil) ⇒ Object 



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# File 'lib/rpdf2txt-rockit/graphdrawing.rb', line 68

def eval_to_dot(ast, parent = nil, linkname = nil, weight = nil)
  if ast
    if ast.kind_of?(SyntaxTree)
	case ast.name
	when "_ArrayNode"
 add_parent_link(parent, ast, linkname, weight)
 @nodes[ast] = "#{ast.id} [label=" + '"[]"]'
 ast.each_with_index {|c,i| eval_to_dot(c, ast, i.inspect)}
	else
 if parent
 end
 # Special handling of Token nodes since we only want to print 
 # the lexeme
 if ast.children_names.sort == ["lexeme", "value"].sort
   @nodes[ast] = "#{ast.id} [shape=box,label=#{ast.lexeme.inspect}]"
   add_parent_link(parent, ast, linkname, weight)
 else
   add_parent_link(parent, ast, linkname, weight)
   @nodes[ast] = "#{ast.id} [label=#{ast.name.inspect}]" 
   ast.childrens.each_with_index {|c,i| 
     eval_to_dot(c, ast, ast.children_names[i])
   }
 end
	end
    elsif ast.class == Array
	# Or nodes return array but they should return ArrayNodes...
	add_parent_link(parent, ast, linkname, weight)
	@nodes[ast] = "#{ast.id} [label=\"[]\"]"
	ast.each_with_index {|c,i| eval_to_dot(c, ast, i)}
    end
  end
end