# -*- coding: utf-8 -*- # # pkpgcounter : a generic Page Description Language parser # # (c) 2003-2009 Jerome Alet # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # # $Id: postscript.py 3567 2013-01-16 07:08:46Z jerome $ # """This modules implements a page counter for PostScript documents.""" import sys import os import pdlparser import inkcoverage class Parser(pdlparser.PDLParser) : """A parser for PostScript documents.""" totiffcommands = [ 'gs -sDEVICE=tiff24nc -dPARANOIDSAFER -dNOPAUSE -dBATCH -dQUIET -r"%(dpi)i" -sOutputFile="%(outfname)s" "%(infname)s"' ] required = [ "gs" ] openmode = "rU" format = "PostScript" def isValid(self) : """Returns True if data is PostScript, else False.""" if self.firstblock.startswith("%!") or \ self.firstblock.startswith("\004%!") or \ self.firstblock.startswith("\033%-12345X%!PS") or \ ((self.firstblock[:128].find("\033%-12345X") != -1) and \ ((self.firstblock.find("LANGUAGE=POSTSCRIPT") != -1) or \ (self.firstblock.find("LANGUAGE = POSTSCRIPT") != -1) or \ (self.firstblock.find("LANGUAGE = Postscript") != -1))) or \ (self.firstblock.find("%!PS-Adobe") != -1) : return True else : return False def throughGhostScript(self) : """Get the count through GhostScript, useful for non-DSC compliant PS files.""" self.logdebug("Internal parser sucks, using GhostScript instead...") if self.isMissing(self.required) : raise pdlparser.PDLParserError, "The gs interpreter is nowhere to be found in your PATH (%s)" % os.environ.get("PATH", "") infname = self.filename command = 'gs -sDEVICE=bbox -dPARANOIDSAFER -dNOPAUSE -dBATCH -dQUIET "%(infname)s" 2>&1 | grep -c "%%HiResBoundingBox:" 2>/dev/null' pagecount = 0 fromchild = os.popen(command % locals(), "r") try : try : pagecount = int(fromchild.readline().strip()) except (IOError, OSError, AttributeError, ValueError), msg : raise pdlparser.PDLParserError, "Problem during analysis of Binary PostScript document : %s" % msg finally : if fromchild.close() is not None : raise pdlparser.PDLParserError, "Problem during analysis of Binary PostScript document" self.logdebug("GhostScript said : %s pages" % pagecount) return pagecount * self.copies def setcopies(self, pagenum, txtvalue) : """Tries to extract a number of copies from a textual value and set the instance attributes accordingly.""" try : number = int(txtvalue) except (ValueError, TypeError) : pass else : if number > self.pages[pagenum]["copies"] : self.pages[pagenum]["copies"] = number def natively(self) : """Count pages in a DSC compliant PostScript document.""" pagecount = 0 self.pages = { 0 : { "copies" : 1 } } oldpagenum = None previousline = "" notrust = False prescribe = False # Kyocera's Prescribe commands acrobatmarker = False pagescomment = None for line in self.infile : line = line.strip() parts = line.split() nbparts = len(parts) if nbparts >= 1 : part0 = parts[0] else : part0 = "" if part0 == r"%ADOPrintSettings:" : acrobatmarker = True elif part0 == "!R!" : prescribe = True elif part0 == r"%%Pages:" : try : pagescomment = max(pagescomment or 0, int(parts[1])) except ValueError : pass # strange, to say the least elif (part0 == r"%%BeginNonPPDFeature:") \ and (nbparts > 2) \ and (parts[1] == "NumCopies") : self.setcopies(pagecount, parts[2]) elif (part0 == r"%%Requirements:") \ and (nbparts > 1) \ and (parts[1] == "numcopies(") : try : self.setcopies(pagecount, line.split('(')[1].split(')')[0]) except IndexError : pass elif part0 == "/#copies" : if nbparts > 1 : self.setcopies(pagecount, parts[1]) elif part0 == r"%RBINumCopies:" : if nbparts > 1 : self.setcopies(pagecount, parts[1]) elif (parts[:4] == ["1", "dict", "dup", "/NumCopies"]) \ and (nbparts > 4) : # handle # of copies set by mozilla/kprinter self.setcopies(pagecount, parts[4]) elif (parts[:6] == ["{", "pop", "1", "dict", "dup", "/NumCopies"]) \ and (nbparts > 6) : # handle # of copies set by firefox/kprinter/cups (alternate syntax) self.setcopies(pagecount, parts[6]) elif (part0 == r"%%Page:") or (part0 == r"(%%[Page:") : proceed = True try : # treats both "%%Page: x x" and "%%Page: (x-y) z" (probably N-up mode) newpagenum = int(line.split(']')[0].split()[-1]) except : notinteger = True # It seems that sometimes it's not an integer but an EPS file name else : notinteger = False if newpagenum <= oldpagenum : # Now correctly handles multiple copies when printed from MSOffice. # Thanks to Jiri Popelka for the fix. proceed = False else : oldpagenum = newpagenum if proceed and not notinteger : pagecount += 1 self.pages[pagecount] = { "copies" : self.pages[pagecount-1]["copies"] } elif (not prescribe) \ and (parts[:3] == [r"%%BeginResource:", "procset", "pdf"]) \ and not acrobatmarker : notrust = True # Let this stuff be managed by GhostScript, but we still extract number of copies elif line.startswith("/languagelevel where{pop languagelevel}{1}ifelse 2 ge{1 dict dup/NumCopies") : self.setcopies(pagecount, previousline[2:]) elif (nbparts > 1) and (parts[1] == "@copies") : self.setcopies(pagecount, part0) previousline = line # extract max number of copies to please the ghostscript parser, just # in case we will use it later self.copies = max([ v["copies"] for (k, v) in self.pages.items() ]) # now apply the number of copies to each page if not pagecount and pagescomment : pagecount = pagescomment for pnum in range(1, pagecount + 1) : page = self.pages.get(pnum, self.pages.get(1, self.pages.get(0, { "copies" : 1 }))) copies = page["copies"] pagecount += (copies - 1) self.logdebug("%s * page #%s" % (copies, pnum)) self.logdebug("Internal parser said : %s pages" % pagecount) return (pagecount, notrust) def getJobSize(self) : """Count pages in PostScript document.""" self.copies = 1 (nbpages, notrust) = self.natively() newnbpages = nbpages if notrust or not nbpages : try : newnbpages = self.throughGhostScript() except pdlparser.PDLParserError, msg : self.logdebug(msg) return max(nbpages, newnbpages)