1 | #! /usr/bin/env python |
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2 | # -*- coding: ISO-8859-15 -*- |
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3 | # |
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4 | # pkpgcounter : a generic Page Description Language parser |
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5 | # |
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6 | # (c) 2003, 2004, 2005, 2006, 2007 Jerome Alet <alet@librelogiciel.com> |
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7 | # This program is free software; you can redistribute it and/or modify |
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8 | # it under the terms of the GNU General Public License as published by |
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9 | # the Free Software Foundation; either version 2 of the License, or |
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10 | # (at your option) any later version. |
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11 | # |
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12 | # This program is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | # GNU General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU General Public License |
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18 | # along with this program; if not, write to the Free Software |
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19 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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20 | # |
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21 | # $Id$ |
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22 | # |
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23 | |
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24 | """This modules implements a page counter for plain text documents.""" |
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25 | |
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26 | import sys |
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27 | import os |
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28 | |
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29 | import pdlparser |
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30 | import version |
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31 | |
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32 | |
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33 | class Parser(pdlparser.PDLParser) : |
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34 | """A parser for plain text documents.""" |
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35 | totiffcommands = [ 'enscript --quiet --portrait --no-header --columns 1 --output - | gs -sDEVICE=tiff24nc -dPARANOIDSAFER -dNOPAUSE -dBATCH -dQUIET -r%(dpi)i -sOutputFile="%(fname)s" -', |
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36 | 'a2ps --borders 0 --quiet --portrait --no-header --columns 1 --output - | gs -sDEVICE=tiff24nc -dPARANOIDSAFER -dNOPAUSE -dBATCH -dQUIET -r%(dpi)i -sOutputFile="%(fname)s" -', |
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37 | ] |
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38 | def isValid(self) : |
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39 | """Returns True if data is plain text, else False. |
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40 | |
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41 | It's hard to detect a plain text file, so we just |
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42 | read the first line, and if it doesn't end in CR or LF |
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43 | we consider it's not plain text. |
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44 | """ |
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45 | line = self.infile.readline() |
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46 | self.infile.seek(0) |
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47 | if line.endswith("\n") or line.endswith("\r") : |
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48 | self.logdebug("DEBUG: Input file seems to be in the plain text format.") |
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49 | return True |
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50 | else : |
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51 | return False |
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52 | |
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53 | def getJobSize(self) : |
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54 | """Counts pages in a plain text document.""" |
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55 | pagesize = 66 # TODO : Does this vary wrt the default page size ? |
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56 | # TODO : /etc/papersize and /etc/paper.config |
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57 | pagecount = 0 |
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58 | linecount = 0 |
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59 | for line in self.infile : |
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60 | if line.endswith("\n") or line.endswith("\r") : |
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61 | linecount += 1 |
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62 | if (linecount > pagesize) : |
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63 | pagecount += 1 |
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64 | linecount = 0 |
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65 | else : |
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66 | cnt = line.count("\f") |
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67 | if cnt : |
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68 | pagecount += cnt |
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69 | linecount = 0 |
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70 | else : |
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71 | raise pdlparser.PDLParserError, "Unsupported file format. Please send the file to %s" % version.__authoremail__ |
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72 | return pagecount + 1 # NB : empty files are catched in isValid() |
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73 | |
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74 | if __name__ == "__main__" : |
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75 | pdlparser.test(Parser) |
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