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index e51cfa93a9ccc4ed13524b486fcf6ed1c5a5f5b2..05b4d7bb754cdb7a2e26e49b608420fb640e39a7 100644 (file)
-#!/usr/bin/env python
-'''
-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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-'''
-
-from Base import Barcode
-import sys
-
-leftMap = [ '0001101', '0011001', '0010011', '0111101', '0100011', '0110001', '0101111', '0111011', '0110111', '0001011' ]
-rightMap = [ '1110010', '1100110', '1101100', '1000010', '1011100', '1001110', '1010000', '1000100', '1001000', '1110100' ]
-weightMap = [ 3, 1, 3, 1, 3, 1, 3 ]
-
-guardBar = '202';
-centerBar = '02020';
-
-class Object(Barcode):
- def encode(self, number):
- result = ''
-
- # Rejig the label for use
- self.label = number[:4] + ' ' + number[4:]
-
- if len(number) < 7 or len(number) > 8 or not number.isdigit():
- sys.stderr.write("Can not encode '" + number + "' into EAN8 Barcode, Size must be 7 or 8 Numbers only\n")
-
- if len(number) == 7:
- number = number + self.calculateChecksum(number)
-
- result = result + guardBar
-
- i = 0
- for num in number:
- if i >= 4:
- result = result + rightMap[int(num)]
- else:
- result = result + leftMap[int(num)]
-
- i = i + 1
- if i == 4:
- result = result + centerBar;
-
- result = result + guardBar;
-
- self.inclabel = ' ' + number[:4] + ' ' + number[4:]
- return result;
-
-
- def calculateChecksum(self, number):
- weight = 0;
- i = 0;
-
- for num in number:
- weight = weight + (int(num) * weightMap[i])
- i = i + 1
-
- weight = 10 - (weight % 10)
- if weight == 10:
- weight = 0
- return str(weight);
-
- def getStyle(self, index):
- result = { 'width' : '1', 'top' : int(self.y), 'write' : True }
- if index==0: # White Space
- result['write'] = False
- elif index==1: # Black Bar
- result['height'] = int(self.height)
- elif index==2: # Guide Bar
- result['height'] = int(self.height) + 8
- return result
+#
+# Copyright (C) 2010 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+"""
+Python barcode renderer for EAN8 barcodes. Designed for use with Inkscape.
+"""
+
+from BaseEan import EanBarcode
+
+class Object(EanBarcode):
+ """Provide an EAN8 barcode generator"""
+ name = 'ean8'
+ lengths = [ 7 ]
+ checks = [ 8 ]
+
+ def _encode(self, n):
+ """Encode an ean8 barcode"""
+ self.label = self.space(n[:4], 3, n[4:])
+ return self.enclose( self.encode_left(n[:4]), self.encode_right(n[4:]) )