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 really minimalist PJL/EJL parser.""" |
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23 | |
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24 | # NOTES : QTY= is the number of collated copies for a job. |
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25 | # NOTES : COPIES= is the number of uncollated copies for each page of a job |
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26 | |
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27 | import sys |
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28 | |
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29 | class PJLParserError(Exception): |
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30 | """An exception for PJLParser related stuff.""" |
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31 | def __init__(self, message = ""): |
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32 | self.message = message |
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33 | Exception.__init__(self, message) |
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34 | def __repr__(self): |
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35 | return self.message |
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36 | __str__ = __repr__ |
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37 | |
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38 | class PJLParser : |
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39 | """A parser for PJL documents. |
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40 | |
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41 | Information extracted for bpl11897.pdf which was |
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42 | downloaded from Hewlett-Packard's website. |
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43 | """ |
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44 | JL = "PJL" |
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45 | def __init__(self, pjljob, debug=0) : |
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46 | """Initializes JL Parser.""" |
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47 | self.debug = debug |
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48 | self.jlmarker = "@%s" % self.JL |
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49 | self.statements = pjljob.replace("\r\n", "\n").split("\n") |
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50 | self.default_variables = {} |
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51 | self.environment_variables = {} |
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52 | self.parsed = 0 |
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53 | self.parse() |
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54 | |
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55 | def __str__(self) : |
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56 | """Outputs our variables as a string of text.""" |
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57 | if not self.parsed : |
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58 | return "" |
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59 | mybuffer = [] |
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60 | if self.default_variables : |
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61 | mybuffer.append("Default variables :") |
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62 | for (k, v) in self.default_variables.items() : |
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63 | mybuffer.append(" %s : %s" % (k, v)) |
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64 | if self.environment_variables : |
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65 | mybuffer.append("Environment variables :") |
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66 | for (k, v) in self.environment_variables.items() : |
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67 | mybuffer.append(" %s : %s" % (k, v)) |
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68 | return "\n".join(mybuffer) |
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69 | |
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70 | def logdebug(self, message) : |
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71 | """Logs a debug message if needed.""" |
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72 | if self.debug : |
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73 | sys.stderr.write("%s\n" % message) |
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74 | |
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75 | def cleanvars(self) : |
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76 | """Cleans the variables dictionnaries.""" |
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77 | for dicname in ("default", "environment") : |
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78 | varsdic = getattr(self, "%s_variables" % dicname) |
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79 | for (k, v) in varsdic.items() : |
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80 | if len(v) == 1 : |
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81 | varsdic[k] = v[0] |
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82 | |
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83 | def parse(self) : |
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84 | """Parses a JL job.""" |
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85 | for i in range(len(self.statements)) : |
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86 | statement = self.statements[i] |
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87 | if statement.startswith(self.jlmarker) : |
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88 | parts = statement.split() |
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89 | nbparts = len(parts) |
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90 | if parts[0] == self.jlmarker : |
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91 | # this is a valid JL statement, but we don't |
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92 | # want to examine all of them... |
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93 | if (nbparts > 2) \ |
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94 | and ((parts[1].upper() in ("SET", "DEFAULT")) \ |
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95 | or ((self.jlmarker == "@EJL") and (parts[1].upper() == "JI"))) : |
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96 | # this is what we are interested in ! |
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97 | try : |
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98 | (varname, value) = "".join(parts[2:]).split("=", 1) # TODO : parse multiple assignments on the same SET/JI statement |
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99 | except : |
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100 | self.logdebug("Invalid JL SET statement [%s]" % repr(statement)) |
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101 | else : |
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102 | # all still looks fine... |
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103 | if parts[1].upper() == "DEFAULT" : |
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104 | varsdic = self.default_variables |
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105 | else : |
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106 | varsdic = self.environment_variables |
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107 | variable = varsdic.setdefault(varname.upper(), []) |
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108 | variable.append(value) |
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109 | else : |
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110 | self.logdebug("Ignored JL statement [%s]" % repr(statement)) |
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111 | self.logdebug(parts) |
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112 | else : |
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113 | self.logdebug("Invalid JL statement [%s]" % repr(statement)) |
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114 | elif (not statement) \ |
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115 | or (statement == r"%-12345X@PJL EOJ") \ |
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116 | or statement[2:].startswith("HP-PCL XL;") : |
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117 | self.logdebug("Ignored JL statement [%s]" % repr(statement)) |
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118 | else : |
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119 | self.logdebug("Invalid JL statement [%s]" % repr(statement)) |
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120 | self.cleanvars() |
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121 | self.parsed = 1 |
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122 | # self.logdebug("%s\n" % str(self)) |
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123 | |
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124 | class EJLParser(PJLParser) : |
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125 | """A parser for EJL (Epson Job Language) documents.""" |
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126 | JL = "EJL" |
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127 | |
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128 | def test() : |
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129 | """Test function.""" |
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130 | if (len(sys.argv) < 2) or ((not sys.stdin.isatty()) and ("-" not in sys.argv[1:])) : |
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131 | sys.argv.append("-") |
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132 | for arg in sys.argv[1:] : |
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133 | klass = PJLParser |
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134 | if arg == "-" : |
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135 | infile = sys.stdin |
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136 | mustclose = False |
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137 | else : |
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138 | if arg.endswith(".ejl") : |
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139 | klass = EJLParser |
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140 | infile = open(arg, "rb") |
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141 | mustclose = True |
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142 | try : |
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143 | parser = klass(infile.read(), debug=1) |
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144 | except PJLParserError, msg : |
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145 | sys.stderr.write("ERROR: %s\n" % msg) |
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146 | sys.stderr.flush() |
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147 | if mustclose : |
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148 | infile.close() |
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149 | sys.stdout.write("%s\n" % str(parser)) |
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150 | |
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151 | if __name__ == "__main__" : |
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152 | test() |
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