Class: Ellington::Visualizer

Inherits:
Object
  • Object
show all
Defined in:
lib/ellington/visualizer.rb

Defined Under Namespace

Classes: Node

Constant Summary collapse

FONTNAME = 
"Helvetica"
RANKSEP = 
0.4
NODE_COLOR = 
"white"
NODE_COLOR_VIRTUAL = 
"gray50"
NODE_COLOR_LINE_GOAL = 
"green2"
NODE_COLOR_ROUTE_GOAL = 
"gold"
NODE_COLOR_PASSENGER_HIT = 
"royalblue1"
NODE_FILLCOLOR = 
"white"
NODE_FILLCOLOR_LINE_GOAL = 
"green2"
NODE_FILLCOLOR_ROUTE_GOAL = 
"gold"
NODE_FONTCOLOR_VIRTUAL = 
"gray40"
NODE_SHAPE = 
"box"
NODE_STYLE = 
"filled,rounded"
NODE_STYLE_VIRTUAL = 
"rounded"
NODE_PENWIDTH_PASSENGER_HIT = 
2
EDGE_PENWIDTH_PASSENGER_HIT = 
2
EDGE_COLOR_PASSENGER_HIT = 
"royalblue1"
EDGE_STYLE_PASSENGER_MISS = 
"dotted"
CLUSTER_STYLE = 
"filled"
CLUSTER_COLOR = 
"gray70"
CLUSTER_FILLCOLOR = 
"gray70"
CLUSTER_PENCOLOR = 
"gray50"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(route, format: :svg, short_names: true) ⇒ Visualizer

Returns a new instance of Visualizer.



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# File 'lib/ellington/visualizer.rb', line 38

def initialize(route, format: :svg, short_names: true)
  @route = route
  @format = format
  @short_names = short_names
end

Instance Attribute Details

#format ⇒ Object (readonly)

Returns the value of attribute format.



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# File 'lib/ellington/visualizer.rb', line 36

def format
  @format
end

#route ⇒ Object (readonly)

Returns the value of attribute route.



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# File 'lib/ellington/visualizer.rb', line 36

def route
  @route
end

#short_names ⇒ Object (readonly)

Returns the value of attribute short_names.



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# File 'lib/ellington/visualizer.rb', line 36

def short_names
  @short_names
end

Instance Method Details

#class_label(obj) ⇒ Object 



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# File 'lib/ellington/visualizer.rb', line 67

def class_label(obj)
  klass = obj
  klass = klass.class unless klass.is_a?(Class)
  return klass.name unless short_names
  klass.name.split("::").last
end

#graph_route(passenger = nil) ⇒ Object 



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# File 'lib/ellington/visualizer.rb', line 141

def graph_route(passenger=nil)
  g = Node.new(nil, GraphViz.new("GraphRoute"))
  set_graph_defaults g.viz
  g.viz[:label] = "#{class_label(route)} Lines"
  g.viz[:ranksep] = 0.8

  route.lines.each_with_index do |line, index|
    line_cluster = g.add(Node.new(line, g.viz.add_graph("cluster#{index}")))
    set_cluster_defaults line_cluster.viz
    line_cluster.viz[:label] = class_label(line)
    add_state_nodes_for_line line_cluster, line, passenger
  end

  viz = g.viz.add_nodes(route.initial_state, :label => state_label(route.initial_state))
  rendered_edges = {}

  if passenger
    passenger_nodes = g.reduce([]) do |memo, line_cluster|
      line_cluster.children.each do |node|
        if node.viz[:color].to_s.gsub(/\W/, "") == NODE_COLOR_PASSENGER_HIT
          memo << node
        end
      end
      memo
    end
    previous_node = nil
    passenger_nodes.each do |node|
      from_viz = previous_node.nil? ? viz : previous_node.viz
      rendered_edges[from_viz.id + node.viz.id] = true
      edge = g.viz.add_edges(from_viz, node.viz)
      edge["color"] = EDGE_COLOR_PASSENGER_HIT
      edge["penwidth"] = EDGE_PENWIDTH_PASSENGER_HIT
      previous_node = node
    end
  end

  route.states.each do |from_state, to_states|
    (to_states || []).each do |to_state|
      from_line = route.lines.to_a.select{ |l| l.states.keys.include?(from_state) }.first
      from_node = g.find(from_line) if from_line
      from_viz = from_node.viz.get_node(from_state) if from_node
      from_viz ||= g.viz.get_node(from_state)
      to_line = route.lines.to_a.select{ |l| l.states.keys.include?(to_state) }.first
      to_node = g.find(to_line) if to_line
      to_viz = to_node.viz.get_node(to_state) if to_node
      to_viz ||= g.viz.get_node(to_state)

      if from_viz && to_viz && !rendered_edges[from_viz.id + to_viz.id]
        rendered_edges[from_viz.id + to_viz.id] = true
        edge = g.viz.add_edges(
          from_viz,
          to_viz
        )
        edge[:style] = EDGE_STYLE_PASSENGER_MISS if passenger
      end
    end
  end

  g.viz.output(format => String)
end

#graph_route_basic(passenger = nil) ⇒ Object 



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# File 'lib/ellington/visualizer.rb', line 79

def graph_route_basic(passenger=nil)
  g = Node.new(nil, GraphViz.new("GraphRouteBasic"))
  set_graph_defaults g.viz
  g.viz[:ranksep] = 1
  g.viz[:label] = "#{class_label(route)} Route - basic"

  route.lines.each_with_index do |line, index|
    line_cluster = g.add(Node.new(line, g.viz.add_graph("cluster#{index}")))
    set_cluster_defaults line_cluster.viz
    line_cluster.viz[:label] = class_label(line)

    %w{PASS FAIL ERROR}.each do |state|
      state_node = line_cluster.add(Node.new(state, line_cluster.viz.add_nodes("#{line.class.name}#{state}", "label" => state)))
      states = line.stations.map{ |s| "#{state} #{s.name}" }
      style_node_for_line(state_node, line, *states)
      style_node_for_route(state_node, route, *states)
      style_node_for_passenger(state_node, passenger, *line.send("#{state.downcase}ed"))
    end
  end

  route.connections.each do |connection|
    to_node = g.find(connection.line)
    to_line = to_node.base

    combos = {}
    g.to_a.each do |node|
      states = node.base.state_names(connection.states)
      states.each do |state|
        (combos[state] ||= []) << node
      end
    end

    if connection.type == :if_any
      combos.each do |state, nodes|
        nodes.each do |node|
          from_line = node.base
          g.viz.add_edges(
            node.viz.get_node("#{from_line.class.name}#{state}"),
            to_node.viz.get_node("#{to_line.class.name}PASS"),
            "lhead" => to_node.viz.id
          )
        end
      end
    end

    if connection.type == :if_all
      combos.each do |state, nodes|
        node_name = nodes.map{ |n| n.base.class.name }.join + state
        node_label = nodes.map{ |n| state_label(state) }.join("\n")
        viz = g.viz.add_nodes(node_name, :label => node_label)
        g.viz.add_edges(
          viz,
          to_node.viz.get_node("#{connection.line.class.name}#{state}"),
          "lhead" => to_node.viz.id
        )
      end
    end
  end

  g.viz.output(format => String)
end

#state_label(state) ⇒ Object 



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# File 'lib/ellington/visualizer.rb', line 74

def state_label(state)
  return state unless short_names
  state.split(" ").map { |part| part.split("::").last }.join(" | ")
end