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# coding=utf-8
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
"""
Python barcode renderer for Code39 Extended barcodes. Designed for Inkscape.
"""
from .Code39 import Code39
encode = list('ABCDEFGHIJKLMNOPQRSTUVWXYZ')
map = {}
i = 0
for char in encode:
map[char] = i
i += 1
# Extended encoding maps for full ASCII Code93
def getMap(array):
result = {}
y = 0
for x in array:
result[chr(x)] = encode[y]
y += 1
return result
# MapA is eclectic, but B, C, D are all ASCII ranges
mapA = getMap([27, 28, 29, 30, 31, 59, 60, 61, 62, 63, 91, 92, 93, 94, 95, 123, 124, 125, 126, 127, 0, 64, 96, 127, 127, 127]) # %
mapB = getMap(range(1, 26)) # $
mapC = getMap(range(33, 58)) # /
mapD = getMap(range(97, 122)) # +
class Code39Ext(Code39):
def encode(self, text):
# We are only going to extend the Code39 barcodes
result = ''
for char in text:
if char in mapA:
char = '%' + mapA[char]
elif char in mapB:
char = '$' + mapB[char]
elif char in mapC:
char = '/' + mapC[char]
elif char in mapD:
char = '+' + mapD[char]
result = result + char
return Code39.encode(self, result)
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