Class: Smurfville::ColorVariableParser

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(sass_directory = Smurfville.sass_directory) ⇒ ColorVariableParser

Returns a new instance of ColorVariableParser.



8
9
10
11
12
13
14
 
# File 'lib/smurfville/color_variable_parser.rb', line 8

def initialize(sass_directory = Smurfville.sass_directory)
  @colors            = {}
  @variable_mappings = {} # e.g. { '$white' => { '$light-color', '$light-background-color' }, $black => {...} }
  @variable_usage    = {} # e.g. { 'white' => { :variables => ['light-color', 'text-color'] } :alternate_values => ['#fff', '#ffffff']}
  @sass_directory    = sass_directory
  @sass_env          = Sass::Environment.new
end

Instance Attribute Details

#colors ⇒ Object

Returns the value of attribute colors.



6
7
8
 
# File 'lib/smurfville/color_variable_parser.rb', line 6

def colors
  @colors
end

#sass_directory ⇒ Object

Returns the value of attribute sass_directory.



6
7
8
 
# File 'lib/smurfville/color_variable_parser.rb', line 6

def sass_directory
  @sass_directory
end

#sass_env ⇒ Object

Returns the value of attribute sass_env.



6
7
8
 
# File 'lib/smurfville/color_variable_parser.rb', line 6

def sass_env
  @sass_env
end

#variable_mappings ⇒ Object

Returns the value of attribute variable_mappings.



6
7
8
 
# File 'lib/smurfville/color_variable_parser.rb', line 6

def variable_mappings
  @variable_mappings
end

#variable_usage ⇒ Object

Returns the value of attribute variable_usage.



6
7
8
 
# File 'lib/smurfville/color_variable_parser.rb', line 6

def variable_usage
  @variable_usage
end

Instance Method Details

#add_color(node, key = nil) ⇒ Object

add found color to @colors



49
50
51
52
53
54
55
56
 
# File 'lib/smurfville/color_variable_parser.rb', line 49

def add_color(node, key = nil)
  key ||= node.expr.to_s

  self.colors[key] ||= { :variables => [], :alternate_values => [] }
  self.colors[key][:variables] << node.name

  self.colors[key][:alternate_values] |= ([node.expr.to_sass, node.expr.inspect] - [key])
end

#parse_sass_directory(directory = sass_directory) ⇒ Object Also known as: parse 



16
17
18
19
20
21
22
23
 
# File 'lib/smurfville/color_variable_parser.rb', line 16

def parse_sass_directory(directory = sass_directory)
  Dir.glob("#{directory}/**/*").each do |file|
    if file.end_with?(".sass", ".scss")
      parse_sass_file(file)
      parse_variable_usage(file)
    end
  end
end

#parse_sass_file(file, options = {}) ⇒ Object

parses Sass file and returns hash with colors and variable_mappings (or false)



27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/smurfville/color_variable_parser.rb', line 27

def parse_sass_file(file, options = {})
  Sass::Engine.for_file(file, options).to_tree.children.each do |node|
    if node.kind_of? Sass::Tree::VariableNode
      if node.expr.is_a? Sass::Script::Color
        add_color(node)

      elsif node.expr.is_a? Sass::Script::Funcall # if function call (e.g. lighten(#000, 20%)), try to resolve to color
        resolved = node.expr.perform(sass_env) rescue false

        if resolved.is_a? Sass::Script::Color
          add_color(node, resolved.to_s)
        end

      elsif node.expr.is_a? Sass::Script::Variable
        (self.variable_mappings[node.expr.name] ||= []) << node.name # add to variable mapping
      end

    end
  end
end

#parse_variable_usage(file) ⇒ Object

count the usages of all the Sass variables



59
60
61
62
63
64
65
66
67
68
69
 
# File 'lib/smurfville/color_variable_parser.rb', line 59

def parse_variable_usage(file)
  grep_output = `grep -iG "\\$" #{file}`
  grep_output.each_line do |line|
    matches = line.scan(/\$[\w-]*/)
    matches.each do |match|
      match.gsub!('$', '')
      self.variable_usage[match] ||= 0
      self.variable_usage[match] += 1
    end
  end
end

#print_variable_usage_count_for(color) ⇒ Object 



71
72
73
 
# File 'lib/smurfville/color_variable_parser.rb', line 71

def print_variable_usage_count_for(color)
  self.variable_usage[color] - 1  rescue 0
end