Contents

#! /usr/bin/env ruby
# coding: utf-8

INPUT_SEPARATOR = /\s+/

class String
  #http://www.techscore.com/blog/2012/12/25/
  def mb_ljust(width, padding=' ')
    output_width = each_char.map{|c| c.bytesize == 1 ? 1 : 2}.reduce(0, &:+)
    padding_size = [0, width - output_width].max
    self + padding * padding_size
  end

  def mb_rjust(width, padding=' ')
    output_width = each_char.map{|c| c.bytesize == 1 ? 1 : 2}.reduce(0, &:+)
    padding_size = [0, width - output_width].max
    padding * padding_size + self
  end
end


#
#
#
class Tefil::ColumnFormer < Tefil::TextFilterBase

  def form(matrix, io = $stdout, separator = " ", left = false)
    #Obtain max length for each column.
    max_lengths = []
    matrix.each do |row|
      row.each_with_index do |item, index|
        item = item.to_s
        max_lengths[index] ||= 0
        size = print_size(item)
        max_lengths[index] = size if max_lengths[index] < size
      end
    end

    #Output
    matrix.each do |row|
      new_items = []
      row.each_with_index do |item, index|
        method = :mb_rjust
        method = :mb_ljust if left
        new_items[index] = item.send(method, max_lengths[index])
      end
      io.puts new_items.join(separator).sub(/ +$/, "")
    end
  end


  private

  def process_stream(in_io, out_io)
    rows = in_io.readlines.map do |line|
      line.strip.split(INPUT_SEPARATOR)
    end
    form(rows, out_io, OPTIONS[:separator], OPTIONS[:left])
  end

  def print_size(string)
    string.each_char.map{|c| c.bytesize == 1 ? 1 : 2}.reduce(0, &:+)
  end

end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
tefil-0.1.3	lib/tefil/columnformer.rb
tefil-0.1.2	lib/tefil/columnformer.rb
tefil-0.1.1	lib/tefil/columnformer.rb
tefil-0.1.0	lib/tefil/columnformer.rb