Class: Lutaml::Formatter::Graphviz

Inherits:
Base
  • Object
show all
Defined in:
lib/lutaml/formatter/graphviz.rb

Defined Under Namespace

Classes: Attributes

Constant Summary collapse

ACCESS_SYMBOLS = 
{
  "public"    => "+",
  "protected" => "#",
  "private"   => "-",
}.freeze
DEFAULT_CLASS_FONT = 
"Helvetica".freeze
VALID_TYPES = 
%i[
  dot
  xdot
  ps
  pdf
  svg
  svgz
  fig
  png
  gif
  jpg
  jpeg
  json
  imap
  cmapx
].freeze

Instance Attribute Summary collapse

Attributes inherited from Base

#type

Instance Method Summary collapse

Methods inherited from Base

format, #format_class_relationship, inherited, name, #name

Constructor Details

#initialize(attributes = {}) ⇒ Graphviz

Returns a new instance of Graphviz.



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# File 'lib/lutaml/formatter/graphviz.rb', line 43

def initialize(attributes = {})
  super

  @graph = Attributes.new
  # Associations lines style, `true` gives curved lines
  # https://graphviz.org/doc/info/attrs.html#d:splines
  @graph["splines"] = "ortho"
  # Padding between outside of picture and nodes
  @graph["pad"] = 0.5
  # Padding between levels
  @graph["ranksep"] = "1.2.equally"
  # Padding between nodes
  @graph["nodesep"] = "1.2.equally"
  # TODO: set rankdir
  # @graph['rankdir'] = 'BT'

  @edge = Attributes.new
  @edge["color"] = "gray50"

  @node = Attributes.new
  @node["shape"] = "box"

  @type = :dot
end

Instance Attribute Details

#edge ⇒ Object (readonly)

Returns the value of attribute edge.



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# File 'lib/lutaml/formatter/graphviz.rb', line 69

def edge
  @edge
end

#graph ⇒ Object (readonly)

Returns the value of attribute graph.



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# File 'lib/lutaml/formatter/graphviz.rb', line 68

def graph
  @graph
end

#node ⇒ Object (readonly)

Returns the value of attribute node.



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# File 'lib/lutaml/formatter/graphviz.rb', line 70

def node
  @node
end

Instance Method Details

#escape_html_chars(text) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 84

def escape_html_chars(text)
  text
    .gsub(/</, "&#60;")
    .gsub(/>/, "&#62;")
    .gsub(/\[/, "&#91;")
    .gsub(/\]/, "&#93;")
end

#format(node) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 78

def format(node)
  dot = super.lines.map(&:rstrip).join("\n")

  generate_from_dot(dot)
end

#format_class(node, hide_members) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 222

def format_class(node, hide_members)
  name = ["<B>#{node.name}</B>"]
  name.unshift("«#{node.keyword}»") if node.keyword
  name_html = <<~HEREDOC
    <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0">
      #{name.map { |n| %(<TR><TD ALIGN="CENTER">#{n}</TD></TR>) }.join('\n')}
    </TABLE>
  HEREDOC

  field_table = format_member_rows(node.attributes, hide_members)
  method_table = format_member_rows(node.methods, hide_members)
  table_body = [name_html, field_table, method_table].map do |type|
    next if type.nil?

    <<~TEXT
      <TR>
        <TD>#{type}</TD>
      </TR>
    TEXT
  end

  <<~HEREDOC.chomp
    <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="10">
      #{table_body.compact.join("\n")}
    </TABLE>
  HEREDOC
end

#format_document(node) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 250

def format_document(node)
  @fontname = node.fontname || DEFAULT_CLASS_FONT
  @node["fontname"] = "#{@fontname}-bold"

  if node.fidelity
    hide_members = node.fidelity["hideMembers"]
    hide_other_classes = node.fidelity["hideOtherClasses"]
  end
  classes = (node.classes +
              node.enums +
              node.data_types +
              node.primitives).map do |class_node|
    graph_node_name = generate_graph_name(class_node.name)

    <<~HEREDOC
      #{graph_node_name} [
        shape="plain"
        fontname="#{@fontname || DEFAULT_CLASS_FONT}"
        label=<#{format_class(class_node, hide_members)}>]
    HEREDOC
  end.join("\n")
  associations = node.classes.map(&:associations).compact.flatten +
    node.associations
  if node.groups
    associations = sort_by_document_groupping(node.groups,
                                              associations)
  end
  classes_names = node.classes.map(&:name)
  associations = associations.map do |assoc_node|
    if hide_other_classes &&
        !classes_names.include?(assoc_node.member_end)
      next
    end

    format_relationship(assoc_node)
  end.join("\n")

  classes = classes.lines.map { |line| "  #{line}" }.join.chomp
  associations = associations
    .lines.map { |line| "  #{line}" }.join.chomp

  <<~HEREDOC
    digraph G {
      graph [#{@graph}]
      edge [#{@edge}]
      node [#{@node}]

    #{classes}

    #{associations}
    }
  HEREDOC
end

#format_field(node) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 92

def format_field(node)
  symbol = ACCESS_SYMBOLS[node.visibility]
  result = "#{symbol}#{node.name}"
  if node.type
    keyword = node.keyword ? "«#{node.keyword}»" : ""
    result += " : #{keyword}#{node.type}"
  end
  if node.cardinality
    result += "[#{node.cardinality['min']}..#{node.cardinality['max']}]"
  end
  result = escape_html_chars(result)
  result = "<U>#{result}</U>" if node.static

  result
end

#format_label(name, cardinality = {}) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 191

def format_label(name, cardinality = {})
  res = "+#{name}"
  if cardinality.nil? ||
      (cardinality["min"].nil? || cardinality["max"].nil?)
    return res
  end

  "#{res} #{cardinality['min']}..#{cardinality['max']}"
end

#format_member_rows(members, hide_members) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 201

def format_member_rows(members, hide_members)
  unless !hide_members && members && members.length.positive?
    return <<~HEREDOC.chomp
      <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0">
        <TR><TD ALIGN="LEFT"></TD></TR>
      </TABLE>
    HEREDOC
  end

  field_rows = members.map do |field|
    %{<TR><TD ALIGN="LEFT">#{format_field(field)}</TD></TR>}
  end
  field_table = <<~HEREDOC.chomp
    <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0">
      #{field_rows.map { |row| ' ' * 10 + row }.join("\n")}
    </TABLE>
  HEREDOC
  field_table << "\n" << " " * 6
  field_table
end

#format_method(node) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 108

def format_method(node)
  symbol = ACCESS_SYMBOLS[node.access]
  result = "#{symbol} #{node.name}"
  if node.arguments
    arguments = node.arguments.map do |argument|
      "#{argument.name}#{" : #{argument.type}" if argument.type}"
    end.join(", ")
  end

  result << "(#{arguments})"
  result << " : #{node.type}" if node.type
  result = "<U>#{result}</U>" if node.static
  result = "<I>#{result}</I>" if node.abstract

  result
end

#format_relationship(node) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 125

def format_relationship(node)
  graph_parent_name = generate_graph_name(node.owner_end)
  graph_node_name = generate_graph_name(node.member_end)
  attributes = generate_graph_relationship_attributes(node)
  graph_attributes = " [#{attributes}]" unless attributes.empty?

  %{#{graph_parent_name} -> #{graph_node_name}#{graph_attributes}}
end

#generate_graph_relationship_attributes(node) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 134

def generate_graph_relationship_attributes(node)
  attributes = Attributes.new
  if %w[dependency realizes].include?(node.member_end_type)
    attributes["style"] = "dashed"
  end
  attributes["dir"] = if node.owner_end_type && node.member_end_type
                        "both"
                      elsif node.owner_end_type
                        "back"
                      else
                        "direct"
                      end
  attributes["label"] = node.action if node.action
  if node.owner_end_attribute_name
    attributes["headlabel"] = format_label(
      node.owner_end_attribute_name,
      node.owner_end_cardinality
    )
  end
  if node.member_end_attribute_name
    attributes["taillabel"] = format_label(
      node.member_end_attribute_name,
      node.member_end_cardinality
    )
  end

  attributes["arrowtail"] = case node.owner_end_type
                            when "composition"
                              "diamond"
                            when "aggregation"
                              "odiamond"
                            when "direct"
                              "vee"
                            else
                              "onormal"
                            end

  attributes["arrowhead"] = case node.member_end_type
                            when "composition"
                              "diamond"
                            when "aggregation"
                              "odiamond"
                            when "direct"
                              "vee"
                            else
                              "onormal"
                            end
  # swap labels and arrows if `dir` eq to `back`
  if attributes["dir"] == "back" && attributes["arrowtail"] != "vee"
    attributes["arrowhead"], attributes["arrowtail"] =
      [attributes["arrowtail"], attributes["arrowhead"]]
    attributes["headlabel"], attributes["taillabel"] =
      [attributes["taillabel"], attributes["headlabel"]]
  end
  attributes
end

#type=(value) ⇒ Object 



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# File 'lib/lutaml/formatter/graphviz.rb', line 72

def type=(value)
  super

  @type = :dot unless VALID_TYPES.include?(@type)
end