Extensions. Barcode extension refactoring (see https://code.launchpad.net/~doctormo...

[inkscape.git] / share / extensions / Barcode / UPCA.py

diff --git a/share/extensions/Barcode/UPCA.py b/share/extensions/Barcode/UPCA.py
index 15d189daaab0518f5405baf3e16d7c10852c1ef3..6ac10943cc856ec704c0ba02342739b8d8840056 100644 (file)
--- a/share/extensions/Barcode/UPCA.py
+++ b/share/extensions/Barcode/UPCA.py
@@ -1,59 +1,37 @@
-#!/usr/bin/env python
-'''
-Copyright (C) 2007 Martin Owens
-
-Thanks to Lineaire Chez of Inkbar ( www.inkbar.lineaire.net )
-
-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
-'''
-
-import EAN13
-from EAN13 import mapLeftFaimly, guardBar, centerBar, mapRight
-import sys
-
-class Object(EAN13.Object):
-       def encode(self, number):
-               result = ''
-
-               if len(number) < 11 or len(number) > 12 or not number.isdigit():
-                       sys.stderr.write("Can not encode '" + number + "' into UPC-A Barcode, Size must be 11 numbers only, and 1 check digit (optional).\n")
-                       return
-
-               if len(number) == 11:
-                       number = number + self.getChecksum(number)
-               else:
-                       if not self.verifyChecksum(number):
-                               sys.stderr.write("UPC-A Checksum not correct for this barcode, omit last character to generate new checksum.\n")
-                               return
-
-               result = result + guardBar
-
-               i = 0
-               for i in range(0,6):
-                       result += mapLeftFaimly[0][int(number[i])]
-
-               result += centerBar
-
-               for i in range (6,12):
-                       result += mapRight[int(number[i])]
-
-               result = result + guardBar;
-
-               self.label    = number[0] + '   ' + number[1:6] + '    ' + number[6:11] + '   ' + number[11]
-               self.inclabel = self.label
-               return result;
-
-       def fontSize(self):
-               return '10'
+#
+# 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
+#
+"""
+Python barcode renderer for UPCA barcodes. Designed for use with Inkscape.
+"""
+
+from BaseEan import EanBarcode
+
+class Object(EanBarcode):
+    """Provides a renderer for EAN12 aka UPC-A Barcodes"""
+    name    = 'upca'
+    lengths = [ 11 ]
+    checks  = [ 12 ]
+
+    def _encode(self, n):
+        """Encode for a UPC-A Barcode"""
+        self.label = self.space(n[0:1], 3, n[1:6], 4, n[6:11], 3, n[11:])
+        return self.enclose(self.encode_left(n[0:6]), self.encode_right(n[6:12]))
+
+    def fontSize(self):
+        """We need a bigger barcode"""
+        return 10