SUPER IMPORTANT 3文字

3moji.rb

#!/usr/bin/env ruby
require 'optparse'

fg = "\u{2b1c}"
bg = "\u{2139}"
opt = OptionParser.new
opt.on("-f CHAR") {|v| fg = v[0] }
opt.on("-b CHAR") {|v| bg = v[0] }
opt.parse!(ARGV)

max_chars = 140
max_cols = 17
bdf_dir = File.dirname(__FILE__)
text = ARGV.join(" ").encode("Shift_JIS")

bdf_files =
  case text.bytesize
  when 1, 2 then ["mplus_j10r-jisx0201.bdf", "mplus_j10r.bdf"]
  when 3, 4 then ["misaki_4x8_jisx0201.bdf", "misaki_gothic.bdf"]
  when 5, 6 then ["3x8.bdf", "k6x8.bdf"]
  else fail
  end
bdf = bdf_files.map {|f| IO.read("#{bdf_dir}/#{f}") }.join("\n")

bits = text.chars.map do |c|
  case c.bytesize
  when 1
    index = c.codepoints.first
  when 2
    lead, trail = c.encode("ISO-2022-JP").bytes[3,2]
    index = (lead << 8) + trail
  end
  pos = (/^ENCODING #{index}$/ =~ bdf)
  width = /BBX (\d+)/.match(bdf, pos)[1].to_i
  /BITMAP\n(.*?)ENDCHAR/m.match(bdf, pos)[1].lines.map do |row|
    nb = row.strip.size * 4
    sprintf("%0*b", width, row.hex >> (nb-width))
  end
end

result_a = bits.first.each_index.map do |i|
  bits.map {|a| a[i] }.join[0,max_cols]
end
ncols, nrows = result_a.first.size, result_a.size
nchars = (ncols+1)*nrows - 1
result_a.pop if nchars > max_chars
if ncols < max_cols and nchars+nrows <= max_chars
  result_a.map! {|row| "0#{row}" }
end
result = result_a.join("\n").tr("01", bg+fg)
puts result

begin
  require 'launchy'
  require 'uri'
  query = URI.encode_www_form({"text" => result})
  Launchy.open("https://twitter.com/share?#{query}")
rescue LoadError
end