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-rw-r--r--share/extensions/barcode/Code39Ext.py97
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diff --git a/share/extensions/barcode/Code39Ext.py b/share/extensions/barcode/Code39Ext.py
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+++ b/share/extensions/barcode/Code39Ext.py
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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")
+
+charmap = {}
+
+i = 0
+for char in encode:
+ charmap[char] = i
+ i += 1
+
+
+def get_map(array):
+ """Extended encoding maps for full ASCII Code93"""
+ result = {}
+ for y, x in enumerate(array):
+ result[chr(x)] = encode[y]
+
+ return result
+
+
+# MapA is eclectic, but B, C, D are all ASCII ranges
+mapA = get_map(
+ [
+ 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 = get_map(range(1, 26)) # $
+mapC = get_map(range(33, 58)) # /
+mapD = get_map(range(97, 122)) # +
+
+
+class Code39Ext(Code39):
+ """Render Code39 Barcodes"""
+
+ def encode(self, text):
+ # We are only going to extend the Code39 barcodes
+ result = ""
+ for character in text:
+ if character in mapA:
+ character = "%" + mapA[character]
+ elif character in mapB:
+ character = "$" + mapB[character]
+ elif character in mapC:
+ character = "/" + mapC[character]
+ elif character in mapD:
+ character = "+" + mapD[character]
+ result = result + character
+
+ return Code39.encode(self, result)