Code39Ext.py

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00001 '''
00002 Copyright (C) 2007 Martin Owens
00003 
00004 This program is free software; you can redistribute it and/or modify
00005 it under the terms of the GNU General Public License as published by
00006 the Free Software Foundation; either version 2 of the License, or
00007 (at your option) any later version.
00008 
00009 This program is distributed in the hope that it will be useful,
00010 but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 GNU General Public License for more details.
00013 
00014 You should have received a copy of the GNU General Public License
00015 along with this program; if not, write to the Free Software
00016 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00017 '''
00018 
00019 import Code39
00020 
00021 encode = list('ABCDEFGHIJKLMNOPQRSTUVWXYZ')
00022 
00023 map = {}
00024 
00025 i = 0
00026 for char in encode:
00027     map[char] = i
00028     i = i + 1
00029 
00030 # Extended encoding maps for full ASCII Code93
00031 def getMap(array):
00032     result = {}
00033     y = 0
00034     for x in array:
00035         result[chr(x)] = encode[y]
00036         y = y + 1
00037 
00038     return result;
00039 
00040 # MapA is eclectic, but B, C, D are all ASCII ranges
00041 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]) # %
00042 mapB = getMap(range(1, 26)) # $
00043 mapC = getMap(range(33, 58)) # /
00044 mapD = getMap(range(97, 122)) # +
00045 
00046 class Object(Code39.Object):
00047     def encode(self, text):
00048         # We are only going to extend the Code39 barcodes
00049         result = ''
00050         for char in text:
00051             if mapA.has_key(char):
00052                 char = '%' + mapA[char]
00053             elif mapB.has_key(char):
00054                 char = '$' + mapB[char]
00055             elif mapC.has_key(char):
00056                 char = '/' + mapC[char]
00057             elif mapD.has_key(char):
00058                 char = '+' + mapD[char]
00059             result = result + char
00060 
00061         return Code39.Object.encode(self, result);
00062
Inkscape

Code39Ext.py
