Class: ULG

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ULG

Returns a new instance of ULG.



7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/ulg.rb', line 7

def initialize
  @debug = 0
  @destfile = nil
  @output = "png"

  @read_files = []

  @graphviz_options = { "type" => "digraph" }

  @nodes = {}
  @edges = {}

  @rex = []

  @rex << '(?<from_open>[\[\<\(\{]*)'
  @rex << '(?<from_label>[^\]\>\)\|\}]+?)'
  @rex << '(?<from_color>\|[^\]\>\)\} ]+?)?'
  @rex << '(?<from_close>[\]\>\)\}]*)'
  
  @rex << '\s(?<from_arrow>[\<\>ox]*)'

  @rex << '(?<edge_open>[\=\-\.]+)'
  @rex << '(?<edge_label>(?:[^\=\-\|\.][^\|]*?[^\=\-\|\.])?)'
  @rex << '(?<edge_color>\|[^\=\-\|\.\ ]+)?'
  @rex << '(?<edge_close>[\=\-\.]+)'

  @rex << '(?<to_arrow>[\<\>ox]*)\s'

  @rex << '(?<to_open>[\[\<\(\{]*)'
  @rex << '(?<to_label>[^\]\>\)\|\}]+?)'
  @rex << '(?<to_color>\|[^\]\>\)\} ]+?)?'
  @rex << '(?<to_close>[\]\>\)\}]*)'

  @arrow_regex = @rex.join '\s*'
end

Instance Attribute Details

#arrow_regex ⇒ Object

Returns the value of attribute arrow_regex.



5
6
7
 
# File 'lib/ulg.rb', line 5

def arrow_regex
  @arrow_regex
end

#destfile ⇒ Object

Returns the value of attribute destfile.



5
6
7
 
# File 'lib/ulg.rb', line 5

def destfile
  @destfile
end

#edges ⇒ Object

Returns the value of attribute edges.



5
6
7
 
# File 'lib/ulg.rb', line 5

def edges
  @edges
end

#nodes ⇒ Object

Returns the value of attribute nodes.



5
6
7
 
# File 'lib/ulg.rb', line 5

def nodes
  @nodes
end

#output ⇒ Object

Returns the value of attribute output.



5
6
7
 
# File 'lib/ulg.rb', line 5

def output
  @output
end

Instance Method Details

#add_edge(from, to, from_arrow, open, label, color, close, to_arrow) ⇒ Object 



207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
 
# File 'lib/ulg.rb', line 207

def add_edge(from, to, from_arrow, open, label, color, close, to_arrow)

  label = label.rstrip.lstrip

  from_name = label_to_name from
  to_name = label_to_name to

  if not label.empty?
    edge_name = label_to_name label
  else
    edge_name = "none"
  end

  return if @edges.has_key? from_name and @edges[from_name].has_key? to_name and @edges[from_name][to_name].has_key? edge_name

  dputs "Adding edge #{edge_name} for #{from_name} #{to_name}"

  @edges[from_name] = {} unless @edges.has_key? from_name
  @edges[from_name][to_name] = {} unless @edges[from_name].has_key? to_name

  arrowtail = parse_arrow from_arrow
  arrowhead = parse_arrow to_arrow

  case open
  when /^\.+$/
    style = "dotted"
  when /^\-+$/
    style = "dashed"
  else
    style = "solid"
  end

  if color
    color = color.gsub /\|+/, ""
  else
    color = "black"
  end

  @edges[from_name][to_name][edge_name] = { "attr" =>  { "style" => style, "label" => label, "arrowtail" => arrowtail, "arrowhead" => arrowhead, "fontcolor" => color } }
end

#add_node(open, label, color, close) ⇒ Object 



173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
 
# File 'lib/ulg.rb', line 173

def add_node(open, label, color, close)

  label = label.rstrip.lstrip
  name = label_to_name label

  if @nodes.has_key? name and not @nodes[name].has_key? 'cleared'
    dputs "Skipping node #{name} as already defined"
    return name
  end

  dputs "Adding node #{name}"

  if color
    color = color.gsub /\|+/, ""
  else
    color = "black"
  end

  case open
  when '<'
    shape = "diamond"
  when '('
    shape = "oval"
  when '{'
    shape = "hexagon"
  else
    shape = "box"
  end

  @nodes[name] = { "attr" => { "shape" => shape, "label" => label, "fontcolor" => color } }

  return name
end

#clear(node) ⇒ Object 



159
160
161
162
163
164
165
166
167
168
169
170
171
 
# File 'lib/ulg.rb', line 159

def clear(node)
  node.lstrip.rstrip!
  name = label_to_name node

  if @nodes.has_key? name
    dputs "Clearing node #{node}"
    @nodes[name]['cleared'] = true
    @nodes[name]['attr']['shape'] = 'box'
    @nodes[name]['attr']['fontcolor'] = 'black'
  else
    wputs "Node not found #{node}"
  end
end

#debug ⇒ Object 



43
44
45
 
# File 'lib/ulg.rb', line 43

def debug
  @debug = 1
end

#dputs(msg) ⇒ Object 



47
48
49
 
# File 'lib/ulg.rb', line 47

def dputs(msg)
  puts "DEBUG #{msg}" if @debug == 1
end

#draw(files) ⇒ Object 



55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
 
# File 'lib/ulg.rb', line 55

def draw(files)
  dputs "Rex: #{@arrow_regex}"

  # Move files parsing out of here
  files.each do |file|
    parse file
  end

  if @nodes.size == 0
    wputs "No nodes found so not saving any output"
    return
  end

  # Move this into a generate function?
  g = GraphViz.new :G, @graphviz_options

  @edges.keys.each do |from|
    @edges[from].keys.each do |to|

	from_label = @nodes[from]["attr"]["label"]
	from_opts = @nodes[from]["attr"].clone
	from_opts.delete "label"

	to_label = @nodes[to]["attr"]["label"]
	to_opts = @nodes[to]["attr"].clone
	to_opts.delete "label"

	dputs "Building from node for #{from_label} as #{from}"
      from_node = g.add_nodes from_label, from_opts
	dputs "Building to node for #{to_label} as #{to}"
      to_node = g.add_nodes to_label, to_opts

      @edges[from][to].keys.each do |edge|
  	  dputs "Building edge #{edge} for #{from} #{to}"
        g.add_edges from_node, to_node, @edges[from][to][edge]["attr"]
      end
    end
  end

  if not @destfile
    if files.size == 1
      @destfile = "#{files[0]}.#{@output}"
    else
      @destfile = "graph.#{@output}"
    end
  end

  puts "Saving output to #{@destfile}"
  g.output @output => @destfile
end

#label_to_name(label) ⇒ Object 



267
268
269
270
 
# File 'lib/ulg.rb', line 267

def label_to_name(label)
  name = label.gsub /\W+/, ""
  return name.downcase
end

#parse(file) ⇒ Object 



106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
 
# File 'lib/ulg.rb', line 106

def parse(file)
 
  # Iterate over array of files if needed

  puts "Reading #{file}"
  if @read_files.include? file
    wputs "Skipping #{file} as I've seen it before"
    return
  end

  if file == "stdin"
    contents = STDIN.read
  else
    if File.readable? file
      contents = File.read(file)
    else
      wputs "Cannot read file #{file}, skipping"
      return
    end
  end

  contents.split("\n").each do |line|
    parse_line line
  end

  @read_files << file
end

#parse_arrow(arrow) ⇒ Object 



248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
 
# File 'lib/ulg.rb', line 248

def parse_arrow(arrow)
  case arrow
  when '<'
    arrow = "normal"
  when '>'
    arrow = "normal"
  when 'o'
    arrow = "dot"
  when 'x'
    arrow = "box"
  when '<>'
    arrow = "diamond"
  else
    arrow = "none"
  end

  return arrow
end

#parse_line(line) ⇒ Object 



134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
 
# File 'lib/ulg.rb', line 134

def parse_line(line)
  line.chomp!

  case line
  when /^\s*option\s+(?<option>\w+)\s+(?<value>\w+)\s*$/i
    set_option $~[:option], $~[:value]

  when /^\s*include\s+(?<file>.*)$/i
    parse $~[:file]

  when /^\s*clear\s+(?<node>.*)$/i
    clear $~[:node]

  when /^\s*#{@arrow_regex}\s*$/
    from = add_node $~[:from_open], $~[:from_label], $~[:from_color], $~[:from_close]
    to = add_node $~[:to_open], $~[:to_label], $~[:to_color], $~[:to_close]

    add_edge from, to, $~[:from_arrow], $~[:edge_open], $~[:edge_label], $~[:edge_color], $~[:edge_close], $~[:to_arrow] 
  end
end

#set_option(option, value) ⇒ Object 



155
156
157
 
# File 'lib/ulg.rb', line 155

def set_option(option, value)
  @graphviz_options[option] = value
end

#wputs(msg) ⇒ Object 



51
52
53
 
# File 'lib/ulg.rb', line 51

def wputs(msg)
  puts "WARN #{msg}"
end