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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
commit | cca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch) | |
tree | 146f39ded1c938019e1ed42d30923c2ac9e86789 /share/extensions/barcode/Code93.py | |
parent | Initial commit. (diff) | |
download | inkscape-12fc8abae6d434cac7670a59ed3a67301cc2eb10.tar.xz inkscape-12fc8abae6d434cac7670a59ed3a67301cc2eb10.zip |
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | share/extensions/barcode/Code93.py | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/share/extensions/barcode/Code93.py b/share/extensions/barcode/Code93.py new file mode 100644 index 0000000..1417b3e --- /dev/null +++ b/share/extensions/barcode/Code93.py @@ -0,0 +1,187 @@ +# 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, USA. +# +""" +Python barcode renderer for Code93 barcodes. Designed for use with Inkscape. +""" + +from .Base import Barcode + +PALLET = list("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%") +PALLET.append("($)") +PALLET.append("(/)") +PALLET.append("(+)") +PALLET.append("(%)") +PALLET.append("MARKER") + +MAP = dict((PALLET[i], i) for i in range(len(PALLET))) + + +def get_map(array): + """Extended ENCODE maps for full ASCII Code93""" + result = {} + pos = 10 + for char in array: + result[chr(char)] = PALLET[pos] + pos += 1 + return result + + +# MapA is eclectic, but B, C, D are all ASCII ranges +MAP_A = 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, + ] +) # % +MAP_B = get_map(range(1, 26)) # $ +MAP_C = get_map(range(33, 58)) # / +MAP_D = get_map(range(97, 122)) # + + +ENCODE = [ + "100010100", + "101001000", + "101000100", + "101000010", + "100101000", + "100100100", + "100100010", + "101010000", + "100010010", + "100001010", + "110101000", + "110100100", + "110100010", + "110010100", + "110010010", + "110001010", + "101101000", + "101100100", + "101100010", + "100110100", + "100011010", + "101011000", + "101001100", + "101000110", + "100101100", + "100010110", + "110110100", + "110110010", + "110101100", + "110100110", + "110010110", + "110011010", + "101101100", + "101100110", + "100110110", + "100111010", + "100101110", + "111010100", + "111010010", + "111001010", + "101101110", + "101110110", + "110101110", + "100100110", + "111011010", + "111010110", + "100110010", + "101011110", + "", +] + + +class Code93(Barcode): + """Encode Code93 Barcode""" + + def encode(self, text): + # start marker + bits = ENCODE[MAP.get("MARKER", -1)] + + # Extend to ASCII charset ( return Array ) + text = Code93.encode_ascii(text) + + # Calculate the checksums + text.append(Code93.checksum(text, 20)) # C + text.append(Code93.checksum(text, 15)) # K + + # Now convert text into the ENCODE bits (black and white stripes) + for char in text: + bits = bits + ENCODE[MAP.get(char, -1)] + + # end marker and termination bar + return bits + ENCODE[MAP.get("MARKER", -1)] + "1" + + @staticmethod + def checksum(text, mod): + """Generate a code 93 checksum""" + weight = len(text) % mod + check = 0 + for char in text: + check = check + (MAP[char] * weight) + # Reset the weight is required + weight -= 1 + if weight == 0: + weight = mod + + return PALLET[check % 47] + + @staticmethod + def encode_ascii(text): + """Some characters need re-ENCODE into the code93 specification""" + result = [] + for char in text: + if char in MAP: + result.append(char) + elif char in MAP_A: + result.append("(%)") + result.append(MAP_A[char]) + elif char in MAP_B: + result.append("($)") + result.append(MAP_B[char]) + elif char in MAP_C: + result.append("(/)") + result.append(MAP_C[char]) + elif char in MAP_D: + result.append("(+)") + result.append(MAP_D[char]) + return result |