root / pkpgcounter / trunk / pkpgpdls / plain.py @ 463

Revision 463, 2.9 kB (checked in by jerome, 15 years ago)

Licensing terms changed to GNU GPL v3.0 or higher.
Removed old PCL3/4/5 parser which for a long time now wasn't used
anymore, and for which I was not the original copyright owner.
Version number bumped to 3.00alpha to reflect licensing changes.

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