Module: HighLine::StringExtensions

Included in:
String
Defined in:
lib/highline/string_extensions.rb

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object


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# File 'lib/highline/string_extensions.rb', line 32

def self.included(base)
  HighLine::COLORS.each do |color|
    base.class_eval <<-END
      if public_instance_methods.map { |m| m.to_s }.
                                 include? "#{color.downcase}"
        undef :#{color.downcase}
      end
      def #{color.downcase}
        color(:#{color.downcase})
      end
    END
    base.class_eval <<-END
      if public_instance_methods.map { |m| m.to_s }.
                                 include? "on_#{color.downcase}"
        undef :on_#{color.downcase}
      end
      def on_#{color.downcase}
        on(:#{color.downcase})
      end
    END
    HighLine::STYLES.each do |style|
      base.class_eval <<-END
        if public_instance_methods.map { |m| m.to_s }.
                                   include? "#{style.downcase}"
          undef :#{style.downcase}
        end
        def #{style.downcase}
          color(:#{style.downcase})
        end
      END
    end
  end

  base.class_eval do
    if public_instance_methods.map { |m| m.to_s }.include? "color"
      undef :color
    end
    if public_instance_methods.map { |m| m.to_s }.include? "foreground"
      undef :foreground
    end
    def color(*args)
      self.class.new(HighLine.color(self, *args))
    end
    alias_method :foreground, :color

    if public_instance_methods.map { |m| m.to_s }.include? "on"
      undef :on
    end
    def on(arg)
      color(('on_' + arg.to_s).to_sym)
    end

    if public_instance_methods.map { |m| m.to_s }.include? "uncolor"
      undef :uncolor
    end
    def uncolor
      self.class.new(HighLine.uncolor(self))
    end

    if public_instance_methods.map { |m| m.to_s }.include? "rgb"
      undef :rgb
    end
    def rgb(*colors)
      color_code = colors.map{|color| color.is_a?(Numeric) ? '%02x'%color : color.to_s}.join
      raise "Bad RGB color #{colors.inspect}" unless color_code =~ /^[a-fA-F0-9]{6}/
      color("rgb_#{color_code}".to_sym)
    end

    if public_instance_methods.map { |m| m.to_s }.include? "on_rgb"
      undef :on_rgb
    end
    def on_rgb(*colors)
      color_code = colors.map{|color| color.is_a?(Numeric) ? '%02x'%color : color.to_s}.join
      raise "Bad RGB color #{colors.inspect}" unless color_code =~ /^[a-fA-F0-9]{6}/
      color("on_rgb_#{color_code}".to_sym)
    end

    if public_instance_methods.map { |m| m.to_s }.include? "method_missing"
      undef :method_missing
    end
    # TODO Chain existing method_missing
    def method_missing(method, *args, &blk)
      if method.to_s =~ /^(on_)?rgb_([0-9a-fA-F]{6})$/
        color(method)
      else
        raise NoMethodError, "undefined method `#{method}' for #<#{self.class}:#{'%#x'%self.object_id}>"
      end
    end
  end
end