Module: Alchemist::UnicodeMonospace

Defined in:
lib/alchemist/unicode_monospace.rb

Defined Under Namespace

Modules: StringExtensions

Constant Summary collapse

DATA_FILE = 
File.join(File.dirname(__FILE__), 'EastAsianWidth.txt')

Class Method Summary collapse

Class Method Details

.build_east_asian_widths ⇒ Object 



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# File 'lib/alchemist/unicode_monospace.rb', line 26

def self.build_east_asian_widths
  widths = {}
  File.open(DATA_FILE) do |io|
    io.each_line do |line|
      next if line =~ /^#/
      code_spec, width, _ = line.split(/;|#/)

      codes = if code_spec =~ /\.\./
                min,max = code_spec.split '..'
                (min.to_i(16)..max.to_i(16)).to_a
              else
                [code_spec.to_i(16)]
              end

      codes.each do |code|
        widths[code] = width && width.strip
      end
    end
  end

  widths
end

.east_asian_width(c) ⇒ Object 



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# File 'lib/alchemist/unicode_monospace.rb', line 16

def self.east_asian_width(c)
  east_asian_widths[c]
end

.east_asian_widths ⇒ Object 



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# File 'lib/alchemist/unicode_monospace.rb', line 20

def self.east_asian_widths
  @east_asian_widths ||= build_east_asian_widths
end