1 files changed, 97 insertions, 0 deletions
diff --git a/share/extensions/barcode/Code39Ext.py b/share/extensions/barcode/Code39Ext.py
new file mode 100644
index 0000000..d990680
--- /dev/null
+++ b/share/extensions/barcode/Code39Ext.py
@@ -0,0 +1,97 @@
+# 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)