Class: Color::Base

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

Direct Known Subclasses

HSL, RGB

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*components) ⇒ Base

Returns a new instance of Base.



36
37
38
39
40
41
42
43
44
 
# File 'lib/color.rb', line 36

def initialize(*components)
  if components[0].is_a?(String)
    @components = []
    self.css = components[0]
  else
    @components = components.flatten.map(&method(:constrain))
  end
  @components << 1.0 if @components.size == 3
end

Class Method Details

.inherited(subclass) ⇒ Object 



15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/color.rb', line 15

def self.inherited(subclass)
  components = subclass.name.sub('Color::', '').downcase.split(//).map(&:to_sym)
  components << :a
  components.each_with_index do |component, i|
    subclass.class_eval <<-"end;"
      def #{component}(value=nil)
        if value
          result = self.class.new(@components)
          result.#{component} = value
          result
        else
          @components[#{i}]
        end
      end
      def #{component}=(x)
        @components[#{i}] = constrain(x)
      end
    end;
  end
end

Instance Method Details

#+(other) ⇒ Object 



58
59
60
61
62
 
# File 'lib/color.rb', line 58

def +(other)
  other_array = other.to_a
  array = component_indicies.map {|i| @components[i] + (other_array[i] || 0)}
  self.class.new(*array)
end

#-(other) ⇒ Object 



54
55
56
 
# File 'lib/color.rb', line 54

def -(other)
  self + other.to_a.map(&:-@)
end

#==(other) ⇒ Object 



64
65
66
 
# File 'lib/color.rb', line 64

def ==(other)
  other.class == self.class && component_indicies.all? {|i| epsilon(@components[i] - other.to_a[i])}
end

#primary_components ⇒ Object 



46
47
48
 
# File 'lib/color.rb', line 46

def primary_components
  @components[0..-2]
end

#to_a ⇒ Object 



50
51
52
 
# File 'lib/color.rb', line 50

def to_a
  @components
end

#to_s ⇒ Object 



68
69
70
 
# File 'lib/color.rb', line 68

def to_s
  "<#{self.class.name}: #{@components.join(", ")}>"
end