Module: SmartColored

Included in:
String
Defined in:
lib/smart_colored.rb

Defined Under Namespace

Classes: String

Constant Summary collapse

COLOR_CODES = 
{
  :black   => 30,
  :red     => 31,
  :green   => 32,
  :yellow  => 33,
  :blue    => 34,
  :magenta => 35,
  :cyan    => 36,
  :white   => 37
}
FORMAT_CODES = 
{
  :bold      => 1,
  :underline => 4,
  :inverse   => 7
}
CLEAR_SEQUENCE = 
"\e[0m"
PART_REGEXP = 
"(?:on_)?(?:#{COLOR_CODES.keys.join('|')})|#{FORMAT_CODES.keys.join('|')}"
COMBINED_REGEXP = 
/^(?:(?:#{PART_REGEXP})_){2,}$/
COMBINED_REGEXP_PART = 
/#{PART_REGEXP}/
@@name_to_attributes = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *arguments, &block) ⇒ Object 



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# File 'lib/smart_colored.rb', line 102

def method_missing(method, *arguments, &block)
  if (method_s = "#{method}_") =~ COMBINED_REGEXP
    attributes = @@name_to_attributes.values_at(*method_s.scan(COMBINED_REGEXP_PART).map(&:to_sym)).inject(&:merge)
    SmartColored.map_name_to_attributes method, attributes
    apply_format(attributes)
  else
    super
  end
end

Class Method Details

.map_name_to_attributes(name, attributes) ⇒ Object 



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# File 'lib/smart_colored.rb', line 82

def self.map_name_to_attributes(name, attributes)
  name = name.to_sym
  @@name_to_attributes[name] = attributes
  define_method name do
    apply_format(attributes)
  end
end

Instance Method Details

#apply_format(format = {}) ⇒ Object 



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# File 'lib/smart_colored.rb', line 27

def apply_format(format = {})
  apply_attributes = {}
  if color = COLOR_CODES[format[:color]]
    apply_attributes[:color] = color
  end
  if background = COLOR_CODES[format[:background]]
    apply_attributes[:background] = background + 10
  end
  FORMAT_CODES.each do |key, value|
    if format[key]
      apply_attributes[value] = true
    end
  end

  previous_attributes = {}
  clear_sequence = false
  str = "#{CLEAR_SEQUENCE}#{self}"
  str.gsub!(/(?:\e\[\d+(?:;\d+)*m)+/) do |m|
    unless $'.empty?
      codes = m.scan(/\d+/).map(&:to_i).uniq
      sequence_attributes = {}
      codes.each do |code|
        case code
        when 0
        when 30..37
          sequence_attributes[:color] = code
        when 40..47
          sequence_attributes[:background] = code
        else
          sequence_attributes[code] = true
        end
      end

      current_attributes = apply_attributes.merge(codes.include?(0) ? sequence_attributes : previous_attributes.merge(sequence_attributes))
      sequence_attributes = if (previous_attributes.keys - current_attributes.keys).empty?
        current_attributes.to_a - previous_attributes.to_a
      else
        current_attributes.merge(0 => true)
      end
      codes = sequence_attributes.map do |key, value|
        key == :color || key == :background ? value : key
      end
      previous_attributes = current_attributes

      unless codes.empty?
        clear_sequence = true
        "\e[#{codes.sort.join(';')}m"
      end
    end
  end
  str << CLEAR_SEQUENCE if clear_sequence
  self.class.new(str)
end

#width ⇒ Object 



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# File 'lib/smart_colored.rb', line 23

def width
  gsub(/\e\[\d+(?:;\d+)*m/, '').length
end