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 ESC/P2 documents.""" |
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23 | |
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24 | import sys |
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25 | |
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26 | import pdlparser |
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27 | |
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28 | class Parser(pdlparser.PDLParser) : |
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29 | """A parser for ESC/P2 documents.""" |
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30 | format = "ESC/P2" |
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31 | def isValid(self) : |
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32 | """Returns True if data is ESC/P2, else False.""" |
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33 | if self.firstblock.startswith("\033@") or \ |
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34 | self.firstblock.startswith("\033*") or \ |
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35 | self.firstblock.startswith("\n\033@") or \ |
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36 | self.firstblock.startswith("\0\0\0\033\1@EJL") : # ESC/P Raster ??? Seen on Stylus Photo 1284 |
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37 | return True |
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38 | else : |
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39 | return False |
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40 | |
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41 | def getJobSize(self) : |
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42 | """Counts pages in an ESC/P2 document.""" |
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43 | # with Gimpprint, at least, for each page there |
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44 | # are two Reset Printer sequences (ESC + @) |
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45 | marker1 = "\033@" |
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46 | |
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47 | # with other software or printer driver, we |
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48 | # may prefer to search for "\r\n\fESCAPE" |
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49 | # or "\r\fESCAPE" |
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50 | marker2r = "\r\f\033" |
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51 | marker2rn = "\r\n\f\033" |
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52 | |
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53 | # and ghostscript's stcolor for example seems to |
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54 | # output ESC + @ + \f for each page plus one |
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55 | marker3 = "\033@\f" |
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56 | |
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57 | # while ghostscript's escp driver outputs instead |
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58 | # \f + ESC + @ |
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59 | marker4 = "\f\033@" |
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60 | |
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61 | data = self.infile.read() |
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62 | pagecount1 = data.count(marker1) |
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63 | pagecount2 = max(data.count(marker2r), data.count(marker2rn)) |
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64 | pagecount3 = data.count(marker3) |
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65 | pagecount4 = data.count(marker4) |
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66 | |
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67 | if pagecount2 : |
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68 | return pagecount2 |
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69 | elif pagecount3 > 1 : |
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70 | return pagecount3 - 1 |
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71 | elif pagecount4 : |
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72 | return pagecount4 |
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73 | else : |
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74 | return int(pagecount1 / 2) |
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