| 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) 2003-2009 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 PostScript documents.""" |
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| 23 | |
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| 24 | import sys |
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| 25 | import os |
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| 26 | |
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| 27 | import pdlparser |
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| 28 | import inkcoverage |
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| 29 | |
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| 30 | class Parser(pdlparser.PDLParser) : |
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| 31 | """A parser for PostScript documents.""" |
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| 32 | totiffcommands = [ 'gs -sDEVICE=tiff24nc -dPARANOIDSAFER -dNOPAUSE -dBATCH -dQUIET -r"%(dpi)i" -sOutputFile="%(outfname)s" "%(infname)s"' ] |
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| 33 | required = [ "gs" ] |
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| 34 | openmode = "rU" |
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| 35 | format = "PostScript" |
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| 36 | def isValid(self) : |
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| 37 | """Returns True if data is PostScript, else False.""" |
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| 38 | if self.firstblock.startswith("%!") or \ |
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| 39 | self.firstblock.startswith("\004%!") or \ |
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| 40 | self.firstblock.startswith("\033%-12345X%!PS") or \ |
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| 41 | ((self.firstblock[:128].find("\033%-12345X") != -1) and \ |
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| 42 | ((self.firstblock.find("LANGUAGE=POSTSCRIPT") != -1) or \ |
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| 43 | (self.firstblock.find("LANGUAGE = POSTSCRIPT") != -1) or \ |
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| 44 | (self.firstblock.find("LANGUAGE = Postscript") != -1))) or \ |
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| 45 | (self.firstblock.find("%!PS-Adobe") != -1) : |
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| 46 | return True |
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| 47 | else : |
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| 48 | return False |
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| 49 | |
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| 50 | def throughGhostScript(self) : |
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| 51 | """Get the count through GhostScript, useful for non-DSC compliant PS files.""" |
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| 52 | self.logdebug("Internal parser sucks, using GhostScript instead...") |
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| 53 | if self.isMissing(self.required) : |
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| 54 | raise pdlparser.PDLParserError, "The gs interpreter is nowhere to be found in your PATH (%s)" % os.environ.get("PATH", "") |
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| 55 | infname = self.filename |
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| 56 | command = 'gs -sDEVICE=bbox -dPARANOIDSAFER -dNOPAUSE -dBATCH -dQUIET "%(infname)s" 2>&1 | grep -c "%%HiResBoundingBox:" 2>/dev/null' |
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| 57 | pagecount = 0 |
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| 58 | fromchild = os.popen(command % locals(), "r") |
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| 59 | try : |
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| 60 | try : |
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| 61 | pagecount = int(fromchild.readline().strip()) |
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| 62 | except (IOError, OSError, AttributeError, ValueError), msg : |
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| 63 | raise pdlparser.PDLParserError, "Problem during analysis of Binary PostScript document : %s" % msg |
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| 64 | finally : |
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| 65 | if fromchild.close() is not None : |
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| 66 | raise pdlparser.PDLParserError, "Problem during analysis of Binary PostScript document" |
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| 67 | self.logdebug("GhostScript said : %s pages" % pagecount) |
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| 68 | return pagecount * self.copies |
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| 69 | |
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| 70 | def setcopies(self, pagenum, txtvalue) : |
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| 71 | """Tries to extract a number of copies from a textual value and set the instance attributes accordingly.""" |
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| 72 | try : |
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| 73 | number = int(txtvalue) |
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| 74 | except (ValueError, TypeError) : |
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| 75 | pass |
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| 76 | else : |
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| 77 | if number > self.pages[pagenum]["copies"] : |
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| 78 | self.pages[pagenum]["copies"] = number |
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| 79 | |
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| 80 | def natively(self) : |
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| 81 | """Count pages in a DSC compliant PostScript document.""" |
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| 82 | pagecount = 0 |
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| 83 | self.pages = { 0 : { "copies" : 1 } } |
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| 84 | oldpagenum = None |
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| 85 | previousline = "" |
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| 86 | notrust = False |
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| 87 | prescribe = False # Kyocera's Prescribe commands |
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| 88 | acrobatmarker = False |
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| 89 | pagescomment = None |
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| 90 | for line in self.infile : |
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| 91 | line = line.strip() |
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| 92 | parts = line.split() |
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| 93 | nbparts = len(parts) |
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| 94 | if nbparts >= 1 : |
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| 95 | part0 = parts[0] |
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| 96 | else : |
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| 97 | part0 = "" |
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| 98 | if part0 == r"%ADOPrintSettings:" : |
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| 99 | acrobatmarker = True |
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| 100 | elif part0 == "!R!" : |
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| 101 | prescribe = True |
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| 102 | elif part0 == r"%%Pages:" : |
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| 103 | try : |
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| 104 | pagescomment = max(pagescomment or 0, int(parts[1])) |
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| 105 | except ValueError : |
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| 106 | pass # strange, to say the least |
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| 107 | elif (part0 == r"%%BeginNonPPDFeature:") \ |
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| 108 | and (nbparts > 2) \ |
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| 109 | and (parts[1] == "NumCopies") : |
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| 110 | self.setcopies(pagecount, parts[2]) |
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| 111 | elif (part0 == r"%%Requirements:") \ |
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| 112 | and (nbparts > 1) \ |
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| 113 | and (parts[1] == "numcopies(") : |
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| 114 | try : |
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| 115 | self.setcopies(pagecount, line.split('(')[1].split(')')[0]) |
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| 116 | except IndexError : |
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| 117 | pass |
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| 118 | elif part0 == "/#copies" : |
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| 119 | if nbparts > 1 : |
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| 120 | self.setcopies(pagecount, parts[1]) |
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| 121 | elif part0 == r"%RBINumCopies:" : |
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| 122 | if nbparts > 1 : |
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| 123 | self.setcopies(pagecount, parts[1]) |
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| 124 | elif (parts[:4] == ["1", "dict", "dup", "/NumCopies"]) \ |
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| 125 | and (nbparts > 4) : |
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| 126 | # handle # of copies set by mozilla/kprinter |
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| 127 | self.setcopies(pagecount, parts[4]) |
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| 128 | elif (parts[:6] == ["{", "pop", "1", "dict", "dup", "/NumCopies"]) \ |
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| 129 | and (nbparts > 6) : |
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| 130 | # handle # of copies set by firefox/kprinter/cups (alternate syntax) |
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| 131 | self.setcopies(pagecount, parts[6]) |
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| 132 | elif (part0 == r"%%Page:") or (part0 == r"(%%[Page:") : |
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| 133 | proceed = True |
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| 134 | try : |
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| 135 | # treats both "%%Page: x x" and "%%Page: (x-y) z" (probably N-up mode) |
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| 136 | newpagenum = int(line.split(']')[0].split()[-1]) |
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| 137 | except : |
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| 138 | notinteger = True # It seems that sometimes it's not an integer but an EPS file name |
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| 139 | else : |
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| 140 | notinteger = False |
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| 141 | if newpagenum == oldpagenum : |
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| 142 | proceed = False |
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| 143 | else : |
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| 144 | oldpagenum = newpagenum |
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| 145 | if proceed and not notinteger : |
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| 146 | pagecount += 1 |
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| 147 | self.pages[pagecount] = { "copies" : self.pages[pagecount-1]["copies"] } |
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| 148 | elif (not prescribe) \ |
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| 149 | and (parts[:3] == [r"%%BeginResource:", "procset", "pdf"]) \ |
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| 150 | and not acrobatmarker : |
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| 151 | notrust = True # Let this stuff be managed by GhostScript, but we still extract number of copies |
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| 152 | elif line.startswith("/languagelevel where{pop languagelevel}{1}ifelse 2 ge{1 dict dup/NumCopies") : |
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| 153 | self.setcopies(pagecount, previousline[2:]) |
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| 154 | elif (nbparts > 1) and (parts[1] == "@copies") : |
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| 155 | self.setcopies(pagecount, part0) |
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| 156 | previousline = line |
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| 157 | |
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| 158 | # extract max number of copies to please the ghostscript parser, just |
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| 159 | # in case we will use it later |
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| 160 | self.copies = max([ v["copies"] for (k, v) in self.pages.items() ]) |
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| 161 | |
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| 162 | # now apply the number of copies to each page |
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| 163 | if not pagecount and pagescomment : |
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| 164 | pagecount = pagescomment |
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| 165 | for pnum in range(1, pagecount + 1) : |
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| 166 | page = self.pages.get(pnum, self.pages.get(1, self.pages.get(0, { "copies" : 1 }))) |
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| 167 | copies = page["copies"] |
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| 168 | pagecount += (copies - 1) |
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| 169 | self.logdebug("%s * page #%s" % (copies, pnum)) |
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| 170 | |
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| 171 | self.logdebug("Internal parser said : %s pages" % pagecount) |
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| 172 | return (pagecount, notrust) |
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| 173 | |
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| 174 | def getJobSize(self) : |
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| 175 | """Count pages in PostScript document.""" |
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| 176 | self.copies = 1 |
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| 177 | (nbpages, notrust) = self.natively() |
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| 178 | newnbpages = nbpages |
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| 179 | if notrust or not nbpages : |
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| 180 | try : |
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| 181 | newnbpages = self.throughGhostScript() |
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| 182 | except pdlparser.PDLParserError, msg : |
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| 183 | self.logdebug(msg) |
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| 184 | return max(nbpages, newnbpages) |
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