1 files changed, 68 insertions, 0 deletions
diff --git a/share/extensions/barcode/Code39Ext.py b/share/extensions/barcode/Code39Ext.py
new file mode 100644
index 0000000..e9e804a
--- /dev/null
+++ b/share/extensions/barcode/Code39Ext.py
@@ -0,0 +1,68 @@
+# 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)