Class: GraphViz

Inherits:
Object
  • Object
show all
Includes:
Constants, GVUtils
Defined in:
lib/graphviz/attrs.rb,
lib/graphviz.rb,
lib/graphviz/ext.rb,
lib/graphviz/xml.rb,
lib/graphviz/edge.rb,
lib/graphviz/node.rb,
lib/graphviz/types.rb,
lib/graphviz/theory.rb,
lib/graphviz/graphml.rb,
lib/graphviz/elements.rb,
lib/graphviz/nothugly.rb,
lib/graphviz/family_tree.rb,
lib/graphviz/math/matrix.rb,
lib/graphviz/types/gv_double.rb,
lib/graphviz/types/esc_string.rb,
lib/graphviz/types/lbl_string.rb,
lib/graphviz/types/html_string.rb,
lib/graphviz/family_tree/couple.rb,
lib/graphviz/family_tree/person.rb,
lib/graphviz/family_tree/sibling.rb,
lib/graphviz/family_tree/generation.rb

Overview

Copyright © 2004, 2005, 2006, 2007, 2008, 2009, 2010 Gregoire Lejeune <[email protected]>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Defined Under Namespace

Classes: Attrs, Edge, Elements, Ext, FamilyTree, GraphML, Math, Node, Theory, Types, XML

Constant Summary collapse

@@format =

Var: Output format (dot, png, jpeg, …)

nil
@@prog =

Var: program to use (dot|twopi)

"dot"
@@path =

Var: program path

[]
@@errors =

Var: Error level

1
@@extlibs =

Var: External libraries

[]

Constants included from Constants

Constants::EDGESATTRS, Constants::FORMATS, Constants::GENCS_ATTRS, Constants::GRAPHSATTRS, Constants::GRAPHTYPE, Constants::NODESATTRS, Constants::PROGRAMS, Constants::RGV_VERSION

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from GVUtils

#escape_path_containing_blanks, #find_executable, #output_and_errors_from_command, #output_from_command

Methods included from Constants

getAttrsFor

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(idName, *args, &block) ⇒ Object

:nodoc:



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# File 'lib/graphviz.rb', line 307

def method_missing( idName, *args, &block ) #:nodoc:
  xName = idName.id2name

  rCod = nil
  
  if block
    # Creating a cluster named '#{xName}'
    rCod = add_graph( xName, args[0]||{} )
    yield( rCod )
  else
    # Create a node named '#{xName}' or search for a node, edge or cluster      
    if @hoNodes.keys.include?( xName )
      if( args[0] )
        return { xName => args[0] }
      else
        return( @hoNodes[xName] ) 
      end
    end
    return( @hoGraphs[xName] ) if @hoGraphs.keys.include?( xName )
          
    rCod = add_node( xName, args[0]||{} )
  end

  return rCod
end

Instance Attribute Details

#edge ⇒ Object Also known as: edge_attrs

This accessor allow you to set global edges attributs



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# File 'lib/graphviz.rb', line 81

def edge
  @edge
end

#graph ⇒ Object

This accessor allow you to set global graph attributs



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# File 'lib/graphviz.rb', line 73

def graph
  @graph
end

#node ⇒ Object Also known as: node_attrs

This accessor allow you to set global nodes attributs



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# File 'lib/graphviz.rb', line 77

def node
  @node
end

Class Method Details

.commonGraph(o1, o2) ⇒ Object

:nodoc:



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# File 'lib/graphviz.rb', line 674

def self.commonGraph( o1, o2 ) #:nodoc:
  g1 = o1.pg
  g2 = o2.pg

  return o1 if g1.nil?
  return o2 if g2.nil?
  
  return g1 if g1.object_id == g2.object_id
  
  return GraphViz::commonGraph( g1, g2 )
end

.default(hOpts) ⇒ Object

Change default options (:use, :path, :errors and :output)



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# File 'lib/graphviz.rb', line 699

def self.default( hOpts )
  hOpts.each do |k, v|
    case k.to_s
      when "use"
        @@prog = v
      when "path"
        @@path = v.split( "," ).map{ |x| x.strip }
      when "errors"
        @@errors = v
      when "extlibs"
        @@extlibs = v.split( "," ).map{ |x| x.strip }
      else
        warn "Invalide option #{k}!"
    end
  end
end

.nothugly(file, save = true) ⇒ Object

Transform to pretty up the SVG output

For more information, see www.hokstad.com/making-graphviz-output-pretty-with-xsl.html and www.hokstad.com/making-graphviz-output-pretty-with-xsl-updated.html

You can use the :nothugly option to GraphViz#output :

graph.output( :svg => "myGraph.svg", :nothugly => true )

Or directly on an SVG output graph :

GraphViz.nothugly( "myGraph.svg" )



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# File 'lib/graphviz/nothugly.rb', line 26

def self.nothugly( file, save = true )
  xslt = XML::XSLT.new()
  xslt.xml = file
  xslt.xsl = File.join( File.dirname(File.expand_path(__FILE__)), "nothugly", "nothugly.xsl" )

  out = xslt.serve()

  if save
    fname = File.join( File.dirname(File.expand_path(file)), File.basename(file))
    File.open( fname, "w" ) { |io|
      io.print out
    }
  else
    return out
  end
end

.options(hOpts) ⇒ Object 



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# File 'lib/graphviz.rb', line 716

def self.options( hOpts )
  GraphViz::default( hOpts )
end

.parse(xFile, hOpts = {}) {|graph| ... } ⇒ Object

Create a new graph from a GraphViz File

Options :

  • :output : Output format (Constants::FORMATS) (default : dot)

  • :file : Output file name (default : none)

  • :use : Program to use (Constants::PROGRAMS) (default : dot)

  • :path : Program PATH

Yields:

  • (graph) 


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# File 'lib/graphviz.rb', line 731

def self.parse( xFile, hOpts = {}, &block ) 
  graph = Dot2Ruby::new( hOpts[:path], nil, nil ).eval( xFile )
  yield( graph ) if( block and graph.nil? == false )
  return graph
end

Instance Method Details

#<<(oNode) ⇒ Object Also known as: >, -, >>

Create an edge between the current cluster and the node or cluster oNode

Raises:

  • (ArgumentError) 


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# File 'lib/graphviz.rb', line 648

def <<( oNode )
  raise( ArgumentError, "Edge between root graph and node or cluster not allowed!" ) if self.pg.nil?

  if( oNode.class == Array ) 
    oNode.each do |no|
      self << no
    end
  else
    return GraphViz::commonGraph( oNode, self ).add_edge( self, oNode )
  end
end

#[](xAttrName) ⇒ Object

Get the value of the graph attribut xAttrName



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# File 'lib/graphviz.rb', line 344

def []( xAttrName )
  if Hash === xAttrName
    xAttrName.each do |key, value|
      self[key] = value
    end
  else
    return( @graph[xAttrName].clone )
  end
end

#[]=(xAttrName, xValue) ⇒ Object

Set value xValue to the graph attribut xAttrName



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# File 'lib/graphviz.rb', line 336

def []=( xAttrName, xValue )
  xValue = xValue.to_s if xValue.class == Symbol
  @graph[xAttrName] = xValue
end

#add(h) ⇒ Object

Add nodes and edges defined by a Hash



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# File 'lib/graphviz.rb', line 285

def add(h)
  if h.kind_of? Hash
    h.each do |node, data|
      add_hash_edge(node, data)
    end
  end 
end

#add_edge(oNodeOne, oNodeTwo, hOpts = {}) ⇒ Object

Create a new edge

In:

  • oNodeOne : First node (or node list)

  • oNodeTwo : Second Node (or node list)

  • hOpts : Edge attributs



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# File 'lib/graphviz.rb', line 165

def add_edge( oNodeOne, oNodeTwo, hOpts = {} )
  
  if( oNodeOne.class == Array ) 
    oNodeOne.each do |no|
      add_edge( no, oNodeTwo, hOpts )
    end
  else
    if( oNodeTwo.class == Array )
      oNodeTwo.each do |nt|
        add_edge( oNodeOne, nt, hOpts )
      end
    else
      oEdge = GraphViz::Edge::new( oNodeOne, oNodeTwo, self )
      oEdge.index = @elements_order.size_of( "edge" )
      
      hOpts.each do |xKey, xValue|
        oEdge[xKey.to_s] = xValue
      end
      
      @elements_order.push( { 
        "type" => "edge", 
        "value" => oEdge
      } )
      @loEdges.push( oEdge )
      
      return( oEdge )
    end
  end
end

#add_graph(xGraphName = nil, hOpts = {}, &block) ⇒ Object Also known as: subgraph

Create a new graph

In:

  • xGraphName : Graph name

  • hOpts : Graph attributs



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# File 'lib/graphviz.rb', line 230

def add_graph( xGraphName = nil, hOpts = {}, &block )
  if xGraphName.kind_of?(Hash)
    hOpts = xGraphName
    xGraphName = nil
  end

  if xGraphName.nil?
    xGraphID = String.random(11)
    xGraphName = ""
  else
    xGraphID = xGraphName
  end
  
  @hoGraphs[xGraphID] = GraphViz::new( xGraphName, {:parent => self, :type => @oGraphType}, &block )
 
  hOpts.each do |xKey, xValue|
    @hoGraphs[xGraphID][xKey.to_s] = xValue
  end
  
  @elements_order.push( { 
    "type" => "graph", 
    "name" => xGraphName,
    "value" => @hoGraphs[xGraphID] 
  } )
  
  return( @hoGraphs[xGraphID] )
end

#add_node(xNodeName, hOpts = {}) ⇒ Object

Create a new node

In:

  • xNodeName : Name of the new node

  • hOpts : Node attributs

Return the GraphViz::Node object created



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# File 'lib/graphviz.rb', line 95

def add_node( xNodeName, hOpts = {} )
  return @hoNodes[xNodeName] || Proc.new {
    @hoNodes[xNodeName] = GraphViz::Node::new( xNodeName, self )
    @hoNodes[xNodeName].index = @elements_order.size_of( "node" )
  
    unless hOpts.keys.include?(:label) or hOpts.keys.include?("label")
      hOpts[:label] = xNodeName
    end
    
    hOpts.each do |xKey, xValue|
      @hoNodes[xNodeName][xKey.to_s] = xValue
    end
  
    @elements_order.push( { 
      "type" => "node", 
      "name" => xNodeName,
      "value" => @hoNodes[xNodeName] 
    } )
  
    return( @hoNodes[xNodeName] )
  }.call
end

#each_attribut(&b) ⇒ Object

Calls block once for each attribut of the graph, passing the name and value to the block as a two-element array.



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# File 'lib/graphviz.rb', line 358

def each_attribut(&b)
  @graph.each do |k,v|
    yield(k,v)
  end
end

#each_edge(&block) ⇒ Object

Allow you to traverse edges



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# File 'lib/graphviz.rb', line 198

def each_edge( &block )
  if block_given?
    @loEdges.each do |edge|
      yield(edge)
    end
  else
    return @loEdges
  end
end

#each_graph(&block) ⇒ Object

Allow you to traverse graphs



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# File 'lib/graphviz.rb', line 272

def each_graph( &block )
  if block_given?
    @hoGraphs.each do |name, graph|
      yield( name, graph )
    end
  else
    return @hoGraphs
  end
end

#each_node(&block) ⇒ Object

Allow you to traverse nodes



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# File 'lib/graphviz.rb', line 140

def each_node( &block )
  if block_given?
    @hoNodes.each do |name, node|
      yield( name, node )
    end
  else
    return( @hoNodes )
  end
end

#edge_count ⇒ Object

Get the number of edges



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# File 'lib/graphviz.rb', line 211

def edge_count
  @loEdges.size
end

#get_edge_at_index(index) ⇒ Object

Return the edge object for the given index



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# File 'lib/graphviz.rb', line 218

def get_edge_at_index( index )
  element = @elements_order[index, "edge"]
  (element.nil?) ? nil : element["value"]
end

#get_graph(xGraphName) {|graph| ... } ⇒ Object

Return the graph object for the given name (or nil)

Yields:

  • (graph) 


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# File 'lib/graphviz.rb', line 261

def get_graph( xGraphName, &block )
  graph = @hoGraphs[xGraphName] || nil
  
  yield( graph ) if( block and graph.nil? == false )
  
  return graph
end

#get_node(xNodeName) {|node| ... } ⇒ Object

Return the node object for the given name (or nil)

Yields:



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# File 'lib/graphviz.rb', line 121

def get_node( xNodeName, &block )
  node = @hoNodes[xNodeName] || nil
  
  yield( node ) if( block and node.nil? == false )
  
  return node
end

#get_node_at_index(index) ⇒ Object

Return the node object for the given index



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# File 'lib/graphviz.rb', line 132

def get_node_at_index( index )
  element = @elements_order[index, "node"]
  (element.nil?) ? nil : element["value"]
end

#graph_attrs ⇒ Object

This accessor allow you to set global graph attributs



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# File 'lib/graphviz.rb', line 74

def graph
  @graph
end

#graph_count ⇒ Object

Get the number of graphs



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# File 'lib/graphviz.rb', line 303

def graph_count
  @hoGraphs.size
end

#name ⇒ Object Also known as: id

Get the graph name



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# File 'lib/graphviz.rb', line 640

def name 
  @name.clone
end

#node_count ⇒ Object

Get the number of nodes



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# File 'lib/graphviz.rb', line 153

def node_count
  @hoNodes.size
end

#output(hOpts = {}) ⇒ Object Also known as: save

Generate the graph

Options :

  • :output : Output format (Constants::FORMATS)

  • :file : Output file name

  • :use : Program to use (Constants::PROGRAMS)

  • :path : Program PATH

  • :<format> => <file> : <file> can be

    • a file name

    • nil, then the output will be printed to STDOUT

    • String, then the output will be returned as a String

  • :errors : DOT error level (default 1)

    • 0 = Error + Warning

    • 1 = Error

    • 2 = none



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# File 'lib/graphviz.rb', line 381

def output( hOpts = {} )
  xDOTScript = ""
  xLastType = nil
  xSeparator = ""
  xData = ""
  lNotHugly = []

  @elements_order.each { |kElement|
    if xLastType.nil? == true or xLastType != kElement["type"]
      
      if xData.length > 0 
        case xLastType
          when "graph_attr"
            xDOTScript << "  " + xData + ";\n"

          when "node_attr"
            xDOTScript << "  node [" + xData + "];\n"
          
          when "edge_attr"
            xDOTScript << "  edge [" + xData + "];\n"
        end
      end
      
      xSeparator = ""
      xData = ""
    end

    xLastType = kElement["type"]

    #Modified by
    #Brandon Coleman 
    #verify value is NOT NULL
    if kElement["value"] == nil then
      raise ArgumentError, "#{kElement["name"]} has a nil value!"
    end

    case kElement["type"]
      when "graph_attr"
        xData << xSeparator + kElement["name"] + " = " + kElement["value"].to_gv
        xSeparator = "; "

      when "node_attr"
        xData << xSeparator + kElement["name"] + " = " + kElement["value"].to_gv
        xSeparator = ", "

      when "edge_attr"
        xData << xSeparator + kElement["name"] + " = " + kElement["value"].to_gv
        xSeparator = ", "

      when "node"
        xDOTScript << "  " + kElement["value"].output() + "\n"

      when "edge"
        xDOTScript << "  " + kElement["value"].output( @oGraphType ) + "\n"

      when "graph"
        xDOTScript << kElement["value"].output() + "\n"

      else
        raise ArgumentError, "Don't know what to do with element type '#{kElement['type']}'"
    end
  }
  
  if xData.length > 0 
    case xLastType
      when "graph_attr"
        xDOTScript << "  " + xData + ";\n"

      when "node_attr"
        xDOTScript << "  node [" + xData + "];\n"
      
      when "edge_attr"
        xDOTScript << "  edge [" + xData + "];\n"
    end
  end
  xDOTScript << "}"

  if @oParentGraph.nil? == false
    xDOTScript = "subgraph #{GraphViz.escape(@name, :unquote_empty => true)} {\n" << xDOTScript

    return( xDOTScript )
  else
    hOutput = {}
    
    hOpts.each do |xKey, xValue|
      xValue = xValue.to_s unless xValue.nil? or [Class, TrueClass, FalseClass].include?(xValue.class)
      case xKey.to_s
        when "use"
          if PROGRAMS.index( xValue ).nil? == true
            raise ArgumentError, "can't use '#{xValue}'"
          end
          @prog = xValue
        when "path"
          @path = xValue.split( "," ).map{ |x| x.strip }
        when "errors"
          @errors = xValue
        when "extlib"
          @extlibs = xValue.split( "," ).map{ |x| x.strip }
        when "scale"
          # Scale input by 'v' (=72)
          @scale = xValue
        when "inverty"
          # Invert y coordinate in output
          @inverty = xValue
        when "no_layout"
          # No layout mode 'v' (=1)
          @no_layout = xValue
        when "reduce"
          # Reduce graph
          @reduce_graph = xValue
        when "Lg"
          # Don't use grid
          @Lg = xValue
        when "LO"
          # Use old attractive force
          @LO = xValue
        when "Ln"
          # Set number of iterations to i
          @Ln = xValue
        when "LU"
          # Set unscaled factor to i
          @LU = xValue
        when "LC"
          # Set overlap expansion factor to v
          @LC = xValue
        when "LT"
          # Set temperature (temperature factor) to v
          @LT = xValue
        when "nothugly"
          begin
            require 'graphviz/nothugly'
            @nothugly = true
          rescue
            warn "You must install ruby-xslt to use nothugly option!"
            @nothugly = false
          end
        else
          if FORMATS.index( xKey.to_s ).nil? == true
            raise ArgumentError, "output format '#{xValue}' invalid"
          end
          hOutput[xKey.to_s] = xValue
      end
    end
    
    @output = hOutput if hOutput.size > 0

    xStict = ((@strict && @oGraphType == "digraph") ? "strict " : "")
    xDOTScript = ("#{xStict}#{@oGraphType} #{GraphViz.escape(@name, :unquote_empty => true)} {\n" << xDOTScript).gsub( "\0", "" )

    xOutputString = (@filename == String ||
      @output.any? {|format, file| file == String })
      
    xOutput = ""
    if @format.to_s == "none" or @output.any? {|fmt, fn| fmt.to_s == "none"}
      if xOutputString
        xOutput << xDOTScript
      else
        xFileName = @output["none"] || @filename
        open( xFileName, "w" ) do |h|
          h.puts xDOTScript
        end
      end
    end
    
    if (@format.to_s != "none" and not @format.nil?) or (@output.any? {|format, file| format != "none" } and @output.size > 0)
      ## Act: Save script and send it to dot
      t = Tempfile::open( File.basename(__FILE__) )
      t.print( xDOTScript )
      t.close
      
      cmd = find_executable( @prog, @path )
      if cmd == nil
        raise StandardError, "GraphViz not installed or #{@prog} not in PATH. Install GraphViz or use the 'path' option"
      end

      cmd = escape_path_containing_blanks(cmd) if IS_JRUBY

      xOutputWithFile = ""
      xOutputWithoutFile = ""
      unless @format.nil? or @format == "none"
        lNotHugly << @filename if @format.to_s == "svg" and @nothugly
        if @filename.nil? or @filename == String
          xOutputWithoutFile = "-T#{@format} "
        else
          xOutputWithFile = "-T#{@format} -o#{@filename} "
        end
      end
      @output.each_except( :key => ["none"] ) do |format, file|
        lNotHugly << file if format.to_s == "svg" and @nothugly
        if file.nil? or file == String
          xOutputWithoutFile << "-T#{format} "
        else
          xOutputWithFile << "-T#{format} -o#{file} "
        end
      end
      
      xExternalLibraries = ""
      @extlibs.each do |lib|
        xExternalLibraries << "-l#{lib} "
      end
      
      xOtherOptions = ""        
      xOtherOptions += " -s#{@scale}" unless @scale.nil?
      xOtherOptions += " -y" if @inverty == true
      unless @no_layout.nil?
        xOtherOptions += " -n"
        xOtherOptions += "2" if @no_layout.to_i == 2
      end
      xOtherOptions += " -x" if @reduce_graph == true
      xOtherOptions += " -Lg" if @Lg == true
      xOtherOptions += " -LO" if @LO == true
      xOtherOptions += " -Ln#{@Ln}" unless @LN.nil?
      xOtherOptions += " -LU#{@LU}" unless @LU.nil?
      xOtherOptions += " -LC#{@LC}" unless @LC.nil?
      xOtherOptions += " -LT#{@LT}" unless @LT.nil?
      
      if IS_JRUBY
        xCmd = "#{cmd} -q#{@errors} #{xExternalLibraries} #{xOtherOptions} #{xOutputWithFile} #{xOutputWithoutFile} #{t.path}"
      elsif IS_CYGWIN
        tmpPath = t.path
        begin
          tmpPath = "'" + `cygpath -w #{t.path}`.chomp + "'"
        rescue
          warn "cygpath is not installed!"
        end
        xCmd = "\"#{cmd}\" -q#{@errors} #{xExternalLibraries} #{xOtherOptions} #{xOutputWithFile} #{xOutputWithoutFile} #{tmpPath}"
      else
        xCmd = "\"#{cmd}\" -q#{@errors} #{xExternalLibraries} #{xOtherOptions} #{xOutputWithFile} #{xOutputWithoutFile} #{t.path}"
      end

      xOutput << output_from_command( xCmd )
    end
    
    # Not Hugly
    lNotHugly.each do |f|
      if f.nil? or f == String
        xOutput = GraphViz.nothugly( xOutput, false )
      else
        GraphViz.nothugly( f, true )
      end
    end
    
    if xOutputString
      xOutput
    else
      print xOutput
    end
  end
end

#pg ⇒ Object

:nodoc:



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# File 'lib/graphviz.rb', line 663

def pg #:nodoc:
  @oParentGraph
end

#root_graph ⇒ Object

Return the root graph



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# File 'lib/graphviz.rb', line 670

def root_graph
  return( (self.pg.nil?) ? self : self.pg.root_graph )
end

#set_position(xType, xKey, xValue) ⇒ Object

:nodoc:



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# File 'lib/graphviz.rb', line 686

def set_position( xType, xKey, xValue ) #:nodoc:
  @elements_order.push( { 
    "type" => "#{xType}_attr", 
    "name" => xKey,
    "value" => xValue 
  } )
end

#to_s ⇒ Object 



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# File 'lib/graphviz.rb', line 633

def to_s
  self.output(:none => String)
end

#type ⇒ Object

Return the graph type (graph digraph)



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# File 'lib/graphviz.rb', line 296

def type
  @oGraphType
end