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# frozen_string_literal: true class Reline::Face SGR_PARAMETERS = { foreground: { black: 30, red: 31, green: 32, yellow: 33, blue: 34, magenta: 35, cyan: 36, white: 37, bright_black: 90, gray: 90, bright_red: 91, bright_green: 92, bright_yellow: 93, bright_blue: 94, bright_magenta: 95, bright_cyan: 96, bright_white: 97 }, background: { black: 40, red: 41, green: 42, yellow: 43, blue: 44, magenta: 45, cyan: 46, white: 47, bright_black: 100, gray: 100, bright_red: 101, bright_green: 102, bright_yellow: 103, bright_blue: 104, bright_magenta: 105, bright_cyan: 106, bright_white: 107, }, style: { reset: 0, bold: 1, faint: 2, italicized: 3, underlined: 4, slowly_blinking: 5, blinking: 5, rapidly_blinking: 6, negative: 7, concealed: 8, crossed_out: 9 } }.freeze class Config ESSENTIAL_DEFINE_NAMES = %i(default enhanced scrollbar).freeze RESET_SGR = "\e[0m".freeze def initialize(name, &block) @definition = {} block.call(self) ESSENTIAL_DEFINE_NAMES.each do |name| @definition[name] ||= { style: :reset, escape_sequence: RESET_SGR } end end attr_reader :definition def define(name, **values) values[:escape_sequence] = format_to_sgr(values.to_a).freeze @definition[name] = values end def reconfigure @definition.each_value do |values| values.delete(:escape_sequence) values[:escape_sequence] = format_to_sgr(values.to_a).freeze end end def [](name) @definition.dig(name, :escape_sequence) or raise ArgumentError, "unknown face: #{name}" end private def sgr_rgb(key, value) return nil unless rgb_expression?(value) if Reline::Face.truecolor? sgr_rgb_truecolor(key, value) else sgr_rgb_256color(key, value) end end def sgr_rgb_truecolor(key, value) case key when :foreground "38;2;" when :background "48;2;" end + value[1, 6].scan(/../).map(&:hex).join(";") end def sgr_rgb_256color(key, value) # 256 colors are # 0..15: standard colors, hight intensity colors # 16..232: 216 colors (R, G, B each 6 steps) # 233..255: grayscale colors (24 steps) # This methods converts rgb_expression to 216 colors rgb = value[1, 6].scan(/../).map(&:hex) # Color steps are [0, 95, 135, 175, 215, 255] r, g, b = rgb.map { |v| v <= 95 ? v / 48 : (v - 35) / 40 } color = (16 + 36 * r + 6 * g + b) case key when :foreground "38;5;#{color}" when :background "48;5;#{color}" end end def format_to_sgr(ordered_values) sgr = "\e[" + ordered_values.map do |key_value| key, value = key_value case key when :foreground, :background case value when Symbol SGR_PARAMETERS[key][value] when String sgr_rgb(key, value) end when :style [ value ].flatten.map do |style_name| SGR_PARAMETERS[:style][style_name] end.then do |sgr_parameters| sgr_parameters.include?(nil) ? nil : sgr_parameters end end.then do |rendition_expression| unless rendition_expression raise ArgumentError, "invalid SGR parameter: #{value.inspect}" end rendition_expression end end.join(';') + "m" sgr == RESET_SGR ? RESET_SGR : RESET_SGR + sgr end def rgb_expression?(color) color.respond_to?(:match?) and color.match?(/\A#[0-9a-fA-F]{6}\z/) end end private_constant :SGR_PARAMETERS, :Config def self.truecolor? @force_truecolor || %w[truecolor 24bit].include?(ENV['COLORTERM']) end def self.force_truecolor @force_truecolor = true @configs&.each_value(&:reconfigure) end def self.[](name) @configs[name] end def self.config(name, &block) @configs ||= {} @configs[name] = Config.new(name, &block) end def self.configs @configs.transform_values(&:definition) end def self.load_initial_configs config(:default) do |conf| conf.define :default, style: :reset conf.define :enhanced, style: :reset conf.define :scrollbar, style: :reset end config(:completion_dialog) do |conf| conf.define :default, foreground: :bright_white, background: :gray conf.define :enhanced, foreground: :black, background: :white conf.define :scrollbar, foreground: :white, background: :gray end end def self.reset_to_initial_configs @configs = {} load_initial_configs end end