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-rw-r--r--share/extensions/barcode/Code25i.py71
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diff --git a/share/extensions/barcode/Code25i.py b/share/extensions/barcode/Code25i.py
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+# coding=utf-8
+#
+# Copyright (C) 2010 Geoffrey Mosini
+#
+# 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, USA.
+#
+"""
+Generate barcodes for Code25-interleaved 2 of 5, for Inkscape.
+"""
+
+from .Base import Barcode
+from inkex.localization import inkex_gettext as _
+
+# 1 means thick, 0 means thin
+ENCODE = {
+ "0": "00110",
+ "1": "10001",
+ "2": "01001",
+ "3": "11000",
+ "4": "00101",
+ "5": "10100",
+ "6": "01100",
+ "7": "00011",
+ "8": "10010",
+ "9": "01010",
+}
+
+
+class Code25i(Barcode):
+ """Convert a text into string binary of black and white markers"""
+
+ # Start and stop code are already encoded into white (0) and black(1) bars
+ def encode(self, text):
+ if not text.isdigit():
+ return self.error(text, _("CODE25 can only encode numbers."))
+ number = text
+
+ # Number of figures to encode must be even,
+ # a 0 is added to the left in case it's odd.
+ if len(number) % 2 > 0:
+ number = "0" + number
+
+ # Number is encoded by pairs of 2 figures
+ size = len(number) // 2
+ encoded = "1010"
+ for i in range(size):
+ # First in the pair is encoded in black (1), second in white (0)
+ black = ENCODE[number[i * 2]]
+ white = ENCODE[number[i * 2 + 1]]
+ for j in range(5):
+ if black[j] == "1":
+ encoded += "11"
+ else:
+ encoded += "1"
+ if white[j] == "1":
+ encoded += "00"
+ else:
+ encoded += "0"
+ return encoded + "1101"