'''
Copyright (C) 2007 Martin Owens

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
'''

from Base import Barcode

encoding = {
	'0' : '000110100',
	'1' : '100100001',
	'2' : '001100001',
	'3' : '101100000', 
	'4' : '000110001',
	'5' : '100110000',
	'6' : '001110000',
	'7' : '000100101',
	'8' : '100100100',
	'9' : '001100100',
	'A' : '100001001',
	'B' : '001001001',
	'C' : '101001000',
	'D' : '000011001',
	'E' : '100011000',
	'F' : '001011000',
	'G' : '000001101',
	'H' : '100001100',
	'I' : '001001100',
	'J' : '000011100',
	'K' : '100000011',
	'L' : '001000011',
	'M' : '101000010',
	'N' : '000010011',
	'O' : '100010010',
	'P' : '001010010',
	'Q' : '000000111',
	'R' : '100000110',
	'S' : '001000110',
	'T' : '000010110',
	'U' : '110000001',
	'V' : '011000001',
	'W' : '111000000',
	'X' : '010010001',
	'Y' : '110010000',
	'Z' : '011010000',
	'-' : '010000101',
	'*' : '010010100',
	'+' : '010001010',
	'$' : '010101000',
	'%' : '000101010',
	'/' : '010100010',
	'.' : '110000100',
	' ' : '011000100',
}

class Object(Barcode):
	# Convert a text into string binary of black and white markers
	def encode(self, text):
		text       = text.upper()
		self.label = text
		text       = '*' + text + '*'
		result     = ''
		# It isposible for us to encode code39
		# into full ascii, but this feature is
		# not enabled here
		for char in text:
			if not encoding.has_key(char):
				char = '-';

			result = result + encoding[char] + '0';

		# Now we need to encode the code39, best read
		# the code to understand what it's up to:
		encoded = '';
		colour   = '1'; # 1 = Black, 0 = White
		for data in result:
			if data == '1':
				encoded = encoded + colour + colour
			else:
				encoded = encoded + colour
			if colour == '1':
				colour = '0'
			else:
				colour = '1'

		self.inclabel = text
		return encoded;

