1 | # -*- coding: utf-8 -*- |
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2 | # |
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3 | # pkpgcounter : a generic Page Description Language parser |
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4 | # |
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5 | # (c) 2003, 2004, 2005, 2006, 2007, 2008 Jerome Alet <alet@librelogiciel.com> |
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6 | # This program is free software: you can redistribute it and/or modify |
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7 | # it under the terms of the GNU General Public License as published by |
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8 | # the Free Software Foundation, either version 3 of the License, or |
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9 | # (at your option) any later version. |
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10 | # |
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11 | # This program is distributed in the hope that it will be useful, |
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12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | # GNU General Public License for more details. |
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15 | # |
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16 | # You should have received a copy of the GNU General Public License |
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17 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 | # |
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19 | # $Id$ |
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20 | # |
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21 | |
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22 | """This modules implements a page counter for plain text documents.""" |
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23 | |
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24 | import pdlparser |
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25 | import version |
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26 | |
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27 | class Parser(pdlparser.PDLParser) : |
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28 | """A parser for plain text documents.""" |
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29 | totiffcommands = [ 'enscript --quiet --portrait --no-header --columns 1 --output - "%(infname)s" | gs -sDEVICE=tiff24nc -dPARANOIDSAFER -dNOPAUSE -dBATCH -dQUIET -r"%(dpi)i" -sOutputFile="%(outfname)s" -', |
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30 | 'a2ps --borders 0 --quiet --portrait --no-header --columns 1 --output - "%(infname)s" | gs -sDEVICE=tiff24nc -dPARANOIDSAFER -dNOPAUSE -dBATCH -dQUIET -r"%(dpi)i" -sOutputFile="%(outfname)s" -', |
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31 | ] |
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32 | required = [ "a2ps | enscript", "gs" ] |
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33 | openmode = "rU" |
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34 | format = "plain text" |
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35 | def isValid(self) : |
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36 | """Returns True if data is plain text, else False. |
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37 | |
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38 | It's hard to detect a plain text file, so we just try to |
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39 | extract lines from the first block (sufficiently large). |
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40 | If it's impossible to find one we consider it's not plain text. |
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41 | """ |
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42 | lines = self.firstblock.split("\r\n") |
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43 | if len(lines) == 1 : |
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44 | lines = lines[0].split("\r") |
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45 | if len(lines) == 1 : |
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46 | lines = lines[0].split("\n") |
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47 | if len(lines) > 1 : |
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48 | return True |
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49 | else : |
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50 | return False |
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51 | |
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52 | def getJobSize(self) : |
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53 | """Counts pages in a plain text document.""" |
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54 | pagesize = 66 # TODO : Does this vary wrt the default page size ? |
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55 | # TODO : /etc/papersize and /etc/paper.config |
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56 | pagecount = 0 |
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57 | linecount = 0 |
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58 | for line in self.infile : |
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59 | if line.endswith("\n") : |
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60 | linecount += 1 |
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61 | if (linecount > pagesize) : |
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62 | pagecount += 1 |
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63 | linecount = 0 |
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64 | else : |
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65 | cnt = line.count("\f") |
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66 | if cnt : |
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67 | pagecount += cnt |
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68 | linecount = 0 |
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69 | else : |
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70 | raise pdlparser.PDLParserError, "Unsupported file format. Please send the file to %s" % version.__authoremail__ |
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71 | return pagecount + 1 # NB : empty files are catched in isValid() |
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