class Reline::Face::Config
Constants
- ESSENTIAL_DEFINE_NAMES
- RESET_SGR
Attributes
Public Class Methods
Source
# File lib/reline/face.rb, line 62 def initialize(name, &block) @definition = {} block.call(self) ESSENTIAL_DEFINE_NAMES.each do |name| @definition[name] ||= { style: :reset, escape_sequence: RESET_SGR } end end
Public Instance Methods
Source
# File lib/reline/face.rb, line 84 def [](name) @definition.dig(name, :escape_sequence) or raise ArgumentError, "unknown face: #{name}" end
Source
# File lib/reline/face.rb, line 72 def define(name, **values) values[:escape_sequence] = format_to_sgr(values.to_a).freeze @definition[name] = values end
Source
# File lib/reline/face.rb, line 77 def reconfigure @definition.each_value do |values| values.delete(:escape_sequence) values[:escape_sequence] = format_to_sgr(values.to_a).freeze end end
Private Instance Methods
Source
# File lib/reline/face.rb, line 126 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
Source
# File lib/reline/face.rb, line 153 def rgb_expression?(color) color.respond_to?(:match?) and color.match?(/\A#[0-9a-fA-F]{6}\z/) end
Source
# File lib/reline/face.rb, line 90 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
Source
# File lib/reline/face.rb, line 108 def sgr_rgb_256color(key, value) # 256 colors are # 0..15: standard colors, high 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
Source
# File lib/reline/face.rb, line 99 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