1 files changed, 123 insertions, 0 deletions
diff --git a/share/extensions/Barcode/Code128.py b/share/extensions/Barcode/Code128.py
new file mode 100644
index 000000000..0ba9cf2ec
--- /dev/null
+++ b/share/extensions/Barcode/Code128.py
@@ -0,0 +1,123 @@
+'''
+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 math
+import re
+
+map = [ '11011001100','11001101100','11001100110','10010011000','10010001100','10001001100','10011001000','10011000100','10001100100','11001001000','11001000100','11000100100','10110011100','10011011100','10011001110','10111001100','10011101100','10011100110','11001110010','11001011100','11001001110','11011100100','11001110100','11101101110','11101001100','11100101100','11100100110','11101100100','11100110100','11100110010','11011011000','11011000110','11000110110','10100011000','10001011000','10001000110','10110001000','10001101000','10001100010','11010001000','11000101000','11000100010','10110111000','10110001110','10001101110','10111011000','10111000110','10001110110','11101110110','11010001110','11000101110','11011101000','11011100010','11011101110','11101011000','11101000110','11100010110','11101101000','11101100010','11100011010','11101111010','11001000010','11110001010','10100110000','10100001100','10010110000','10010000110','10000101100','10000100110','10110010000','10110000100','10011010000','10011000010','10000110100','10000110010','11000010010','11001010000','11110111010','11000010100','10001111010','10100111100','10010111100','10010011110','10111100100','10011110100','10011110010','11110100100','11110010100','11110010010','11011011110','11011110110','11110110110','10101111000','10100011110','10001011110','10111101000','10111100010','11110101000','11110100010','10111011110','10111101110','11101011110','11110101110','11010000100','11010010000','11010011100','11000111010','11' ]
+
+def mapExtra(sd, chars):
+	result = list(sd)
+	for char in chars:
+		result.append(chr(char))
+	result.append('FNC3')
+	result.append('FNC2')
+	result.append('SHIFT')
+	return result
+
+# The mapExtra method is used to slim down the amount
+# of pre code and instead we generate the lists
+charAB = list(r' !"#$%&\()*+,./0123456789:;<=>?@ABCDEFGHIJKLMNOPQSTUVWXYZ\]^_')
+charA = mapExtra(charAB, range(0, 31)) # Offset 64
+charB = mapExtra(charAB, range(96, 125)) # Offset -32
+
+class Object(Barcode):
+	def encode(self, text):
+		result = ''
+		blocks = []
+		block  = ''
+
+		# Split up into sections of numbers, or charicters
+		# This makes sure that all the charicters are encoded
+		# In the best way posible for Code128
+		for datum in re.findall(r'(?:(?:\d\d){2,})|.', text):
+			if len(datum) == 1:
+				block = block + datum
+			else:
+				if block:
+					blocks.append(self.bestBlock(block))
+					block = ''
+				blocks.append( [ 'C', datum ] )
+
+		if block:
+			blocks.append(self.bestBlock(block))
+			block = '';
+		
+		self.inclabel = text
+		return self.encodeBlocks(blocks)
+
+	def bestBlock(self, block):
+		# If this has lower case then select B over A
+		if block.upper() == block:
+			return [ 'B', block ]
+		return [ 'A', block ]
+		
+	def encodeBlocks(self, blocks):
+		total  = 0
+		pos    = 0
+		encode = '';
+	
+		for block in blocks:
+			set   = block[0]
+			datum = block[1]
+
+			# POS :   0,   1
+			# A   : 101, 103
+			# B   : 100, 104
+			# C   :  99, 105
+			num = 0;
+			if set == 'A':
+				num = 101
+			elif set == 'B':
+				num = 100
+			elif set == 'C':
+				num = 99
+
+			i = pos
+			if pos:
+				num = num + (math.abs(num - 102) * 2)
+			else:
+				i = 1
+
+			total = total + num * i
+			encode = encode + map[num]
+			pos = pos + 1
+
+			if set == 'A' or set == 'B':
+				chars = charB
+				if set == 'B':
+					chars = charA
+
+				for char in datum:
+					total = total + (chars.index(char) * pos)
+					encode = encode + map[chars.index(char)]
+					pos = pos + 1
+			else:
+				for char in (datum[i:i+2] for i in range(0, len(datum), 2)):
+					total = total + (int(char) * pos)
+					encode = encode + map[int(char)]
+					pos = pos + 1
+	
+		checksum = total % 103
+		encode = encode + map[checksum]
+		encode = encode + map[106]
+		encode = encode + map[107]
+	
+		return encode
+