module Manilla::Folder

Breaks long logical lines of text into multiple delimited representations. Lines can be folded into a set width of octets excluding line breaks.

Public Class Methods

call(text, maxwidth, delimiter, break_on) click to toggle source
# File lib/manilla/folder.rb, line 7
def self.call(text, maxwidth, delimiter, break_on)
  lines = []

  value = text.strip
  value = value.gsub(/\n+/, '')
  value = value.gsub(/\s{2,}/, '')

  while value.size > maxwidth
    count = maxwidth

    while count
      break_index = nil
      break_pos = nil
      line = value[0, count]

      if break_on == :word
        break_index = line.rindex(/\s/)
        break_pos = break_index + 1 if break_index
        line = line[0, break_pos] if break_pos

        count = break_pos || maxwidth
      end

      oct = line.size

      if oct > maxwidth
        count -= oct - maxwidth
      else
        lines << line
        value = value[count, value.size]
        break
      end
    end
  end

  lines << value unless value.strip.empty?

  lines.join(delimiter)
end