module SuperDiff::Csi

# File lib/super_diff/csi.rb, line 39
def self.already_colorized?(text)
  text.match?(/\e\[\d+m/)
end

# File lib/super_diff/csi.rb, line 23
def self.color_enabled?
  @color_enabled
end

# File lib/super_diff/csi.rb, line 27
def self.colorize(*args, **opts, &block)
  if color_enabled?
    ColorizedDocument.new(*args, **opts, &block)
  else
    UncolorizedDocument.new(*args, **opts, &block)
  end
end

# File lib/super_diff/csi.rb, line 35
def self.decolorize(text)
  text.gsub(/\e\[\d+(?:;\d+)*m(.+?)\e\[0m/, '\1')
end

# File lib/super_diff/csi.rb, line 43
def self.inspect_colors_in(text)
  [FourBitColor, EightBitColor, TwentyFourBitColor].
    reduce(text) do |str, klass|
      klass.sub_colorized_areas_in(str) do |area, color|
        color_block = colorize("◼︎", color.to_foreground)

        layer_indicator =
          if color.foreground?
            "(fg)"
          else
            "(bg)"
          end

        "#{color_block} #{layer_indicator} ❮#{area}❯"
      end
    end
end

# File lib/super_diff/csi.rb, line 19
def self.reset_sequence
  ResetSequence.new
end