#--
# rbmh/ansi.rb : rbmhshow 0.4.2
#
# Copyright (C) 2004--2005  Merlin Hughes  <ruby AT merlin DOT org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#++
# ANSI colouring

module RBMH
  class ANSI
  end

  def ANSI.color(*attrs)
    return '' if ENV['MONOCHROME'] == 'true'
    str = ""
    attrs.each { |attr|
      case attr
      when 'bold'
        esc = 1
      when 'italics'
        esc = 3
      when 'underline'
        esc = 4
      when 'inverse'
        esc = 7
      when 'strikethrough'
        esc = 9
      when '-bold'
        esc = 22
      when '-italics'
        esc = 23
      when '-underline'
        esc = 24
      when '-inverse'
        esc = 27
      when '-strikethrough'
        esc = 29
      when 'black'
        esc = 30
      when 'red'
        esc = 31
      when 'green'
        esc = 32
      when 'yellow'
        esc = 33
      when 'blue'
        esc = 34
      when 'magenta'
        esc = 35
      when 'cyan'
        esc = 36
      when 'white'
        esc = 37
      when '-color'
        esc = 39
      else
        raise RBMH::Exception, "unknown attribute - #{attr}"
      end
      str << (str.empty? ? "\e[" : ';') << esc.to_s
    }
    str.empty? ? str : (str << 'm')
  end

  def ANSI.uncolor
    return '' if ENV['MONOCHROME'] == 'true'
    "\e[0m"
  end
end # module RBMH