Module: Ccharts::Color

Defined in:
lib/ccharts/color.rb

Overview

ANSI color escapes matching the C library's ccharts_color_index values (abi/ccharts_abi.h). These come straight from the library: a binding passes the escape string (or NULL for the library default) through the settings structs, so every binding resolves the same names to the same escapes.

Constant Summary collapse

ESCAPES = 
{
  "black"        => "\e[30m",
  "red"          => "\e[31m",
  "green"        => "\e[32m",
  "yellow"       => "\e[33m",
  "blue"         => "\e[34m",
  "magenta"      => "\e[35m",
  "cyan"         => "\e[36m",
  "white"        => "\e[37m",
  "bright_black" => "\e[90m",
  "bright_red"   => "\e[91m",
  "bright_green" => "\e[92m",
  "bright_yellow"=> "\e[93m",
  "bright_blue"  => "\e[94m",
  "bright_magenta"=> "\e[95m",
  "bright_cyan"  => "\e[96m",
  "bright_white" => "\e[97m",
  "reset"        => "\e[0m",
}.freeze

Class Method Summary collapse

Class Method Details

.[](name) ⇒ Object

The ANSI escape for a named color, or nil when unknown.



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# File 'lib/ccharts/color.rb', line 42

def self.[](name)
  ESCAPES[name.to_s]
end

.resolve(value) ⇒ Object

Resolve a color given either a name ("blue"), a Symbol (:blue), or a raw ANSI escape sequence (256-color/truecolor strings passed straight through). Returns the escape string, or nil if the value is nil/empty (library default). Unknown names fall back to the literal string so raw escapes keep working.



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# File 'lib/ccharts/color.rb', line 34

def self.resolve(value)
  return nil if value.nil?
  s = value.to_s
  return nil if s.empty?
  ESCAPES[s] || s
end