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Diffstat (limited to 'bin/reportlab/graphics/barcode/code39.py')
| -rw-r--r-- | bin/reportlab/graphics/barcode/code39.py | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/bin/reportlab/graphics/barcode/code39.py b/bin/reportlab/graphics/barcode/code39.py new file mode 100644 index 00000000000..697b54045b7 --- /dev/null +++ b/bin/reportlab/graphics/barcode/code39.py @@ -0,0 +1,248 @@ +# +# Copyright (c) 1996-2000 Tyler C. Sarna <tsarna@sarna.org> +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# 3. All advertising materials mentioning features or use of this software +# must display the following acknowledgement: +# This product includes software developed by Tyler C. Sarna. +# 4. Neither the name of the author nor the names of contributors +# may be used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS +# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# + +from reportlab.lib.units import inch +from common import Barcode +import string + +_patterns = { + '0': ("bsbSBsBsb", 0), '1': ("BsbSbsbsB", 1), + '2': ("bsBSbsbsB", 2), '3': ("BsBSbsbsb", 3), + '4': ("bsbSBsbsB", 4), '5': ("BsbSBsbsb", 5), + '6': ("bsBSBsbsb", 6), '7': ("bsbSbsBsB", 7), + '8': ("BsbSbsBsb", 8), '9': ("bsBSbsBsb", 9), + 'A': ("BsbsbSbsB", 10), 'B': ("bsBsbSbsB", 11), + 'C': ("BsBsbSbsb", 12), 'D': ("bsbsBSbsB", 13), + 'E': ("BsbsBSbsb", 14), 'F': ("bsBsBSbsb", 15), + 'G': ("bsbsbSBsB", 16), 'H': ("BsbsbSBsb", 17), + 'I': ("bsBsbSBsb", 18), 'J': ("bsbsBSBsb", 19), + 'K': ("BsbsbsbSB", 20), 'L': ("bsBsbsbSB", 21), + 'M': ("BsBsbsbSb", 22), 'N': ("bsbsBsbSB", 23), + 'O': ("BsbsBsbSb", 24), 'P': ("bsBsBsbSb", 25), + 'Q': ("bsbsbsBSB", 26), 'R': ("BsbsbsBSb", 27), + 'S': ("bsBsbsBSb", 28), 'T': ("bsbsBsBSb", 29), + 'U': ("BSbsbsbsB", 30), 'V': ("bSBsbsbsB", 31), + 'W': ("BSBsbsbsb", 32), 'X': ("bSbsBsbsB", 33), + 'Y': ("BSbsBsbsb", 34), 'Z': ("bSBsBsbsb", 35), + '-': ("bSbsbsBsB", 36), '.': ("BSbsbsBsb", 37), + ' ': ("bSBsbsBsb", 38), '*': ("bSbsBsBsb", 39), + '$': ("bSbSbSbsb", 40), '/': ("bSbSbsbSb", 41), + '+': ("bSbsbSbSb", 42), '%': ("bsbSbSbSb", 43) +} + +_valchars = [ + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', + 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', + 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', + 'X', 'Y', 'Z', '-', '.', ' ', '*', '$', '/', '+', '%' +] + +_extended = { + '\0': "%U", '\01': "$A", '\02': "$B", '\03': "$C", + '\04': "$D", '\05': "$E", '\06': "$F", '\07': "$G", + '\010': "$H", '\011': "$I", '\012': "$J", '\013': "$K", + '\014': "$L", '\015': "$M", '\016': "$N", '\017': "$O", + '\020': "$P", '\021': "$Q", '\022': "$R", '\023': "$S", + '\024': "$T", '\025': "$U", '\026': "$V", '\027': "$W", + '\030': "$X", '\031': "$Y", '\032': "$Z", '\033': "%A", + '\034': "%B", '\035': "%C", '\036': "%D", '\037': "%E", + '!': "/A", '"': "/B", '#': "/C", '$': "/D", + '%': "/E", '&': "/F", '\'': "/G", '(': "/H", + ')': "/I", '*': "/J", '+': "/K", ',': "/L", + '/': "/O", ':': "/Z", ';': "%F", '<': "%G", + '=': "%H", '>': "%I", '?': "%J", '@': "%V", + '[': "%K", '\\': "%L", ']': "%M", '^': "%N", + '_': "%O", '`': "%W", 'a': "+A", 'b': "+B", + 'c': "+C", 'd': "+D", 'e': "+E", 'f': "+F", + 'g': "+G", 'h': "+H", 'i': "+I", 'j': "+J", + 'k': "+K", 'l': "+L", 'm': "+M", 'n': "+N", + 'o': "+O", 'p': "+P", 'q': "+Q", 'r': "+R", + 's': "+S", 't': "+T", 'u': "+U", 'v': "+V", + 'w': "+W", 'x': "+X", 'y': "+Y", 'z': "+Z", + '{': "%P", '|': "%Q", '}': "%R", '~': "%S", + '\177': "%T" +} + + +_stdchrs = string.digits + string.uppercase + "-. *$/+%" +_extchrs = _stdchrs + string.lowercase + \ + "\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017" + \ + "\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" + \ + "!'#&\"(),:;<=>?@[\\]^_`{|}~\177" + +def _encode39(value, cksum, stop): + v = sum([_patterns[c][1] for c in value]) % 43 + if cksum: + value += _valchars[v] + if stop: value = '*'+value+'*' + return value + +class _Code39Base(Barcode): + barWidth = inch * 0.0075 + lquiet = None + rquiet = None + quiet = 1 + gap = None + barHeight = None + ratio = 2.2 + checksum = 1 + bearers = 0.0 + stop = 1 + def __init__(self, value = "", **args): + for k, v in args.iteritems(): + setattr(self, k, v) + + if self.quiet: + if self.lquiet is None: + self.lquiet = max(inch * 0.25, self.barWidth * 10.0) + self.rquiet = max(inch * 0.25, self.barWidth * 10.0) + else: + self.lquiet = self.rquiet = 0.0 + + Barcode.__init__(self, value) + + def decompose(self): + dval = "" + for c in self.encoded: + dval = dval + _patterns[c][0] + 'i' + self.decomposed = dval[:-1] + return self.decomposed + + def _humanText(self): + return self.stop and self.encoded[1:-1] or self.encoded + +class Standard39(_Code39Base): + """ + Options that may be passed to constructor: + + value (int, or numeric string. required.): + The value to encode. + + barWidth (float, default .0075): + X-Dimension, or width of the smallest element + Minumum is .0075 inch (7.5 mils). + + ratio (float, default 2.2): + The ratio of wide elements to narrow elements. + Must be between 2.0 and 3.0 (or 2.2 and 3.0 if the + barWidth is greater than 20 mils (.02 inch)) + + gap (float or None, default None): + width of intercharacter gap. None means "use barWidth". + + barHeight (float, see default below): + Height of the symbol. Default is the height of the two + bearer bars (if they exist) plus the greater of .25 inch + or .15 times the symbol's length. + + checksum (bool, default 1): + Wether to compute and include the check digit + + bearers (float, in units of barWidth. default 0): + Height of bearer bars (horizontal bars along the top and + bottom of the barcode). Default is 0 (no bearers). + + quiet (bool, default 1): + Wether to include quiet zones in the symbol. + + lquiet (float, see default below): + Quiet zone size to left of code, if quiet is true. + Default is the greater of .25 inch, or .15 times the symbol's + length. + + rquiet (float, defaults as above): + Quiet zone size to right left of code, if quiet is true. + + stop (bool, default 1): + Whether to include start/stop symbols. + + Sources of Information on Code 39: + + http://www.semiconductor.agilent.com/barcode/sg/Misc/code_39.html + http://www.adams1.com/pub/russadam/39code.html + http://www.barcodeman.com/c39_1.html + + Official Spec, "ANSI/AIM BC1-1995, USS" is available for US$45 from + http://www.aimglobal.org/aimstore/ + """ + def validate(self): + vval = "" + self.valid = 1 + for c in self.value: + if c in string.lowercase: + c = string.upper(c) + if c not in _stdchrs: + self.valid = 0 + continue + vval = vval + c + self.validated = vval + return vval + + def encode(self): + self.encoded = _encode39(self.validated, self.checksum, self.stop) + return self.encoded + +class Extended39(_Code39Base): + """ + Extended Code 39 is a convention for encoding additional characters + not present in stanmdard Code 39 by using pairs of characters to + represent the characters missing in Standard Code 39. + + See Standard39 for arguments. + + Sources of Information on Extended Code 39: + + http://www.semiconductor.agilent.com/barcode/sg/Misc/xcode_39.html + http://www.barcodeman.com/c39_ext.html + """ + def validate(self): + vval = "" + self.valid = 1 + for c in self.value: + if c not in _extchrs: + self.valid = 0 + continue + vval = vval + c + self.validated = vval + return vval + + def encode(self): + self.encoded = "" + for c in self.validated: + if _extended.has_key(c): + self.encoded = self.encoded + _extended[c] + elif c in _stdchrs: + self.encoded = self.encoded + c + else: + raise ValueError + self.encoded = _encode39(self.encoded, self.checksum,self.stop) + return self.encoded |