1 | #! /usr/bin/env python |
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2 | # -*- coding: ISO-8859-15 -*- |
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3 | |
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4 | # A banner generator for PyKota |
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5 | # |
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6 | # PyKota - Print Quotas for CUPS and LPRng |
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7 | # |
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8 | # (c) 2003-2004 Jerome Alet <alet@librelogiciel.com> |
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9 | # This program is free software; you can redistribute it and/or modify |
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10 | # it under the terms of the GNU General Public License as published by |
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11 | # the Free Software Foundation; either version 2 of the License, or |
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12 | # (at your option) any later version. |
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13 | # |
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14 | # This program is distributed in the hope that it will be useful, |
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15 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | # GNU General Public License for more details. |
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18 | # |
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19 | # You should have received a copy of the GNU General Public License |
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20 | # along with this program; if not, write to the Free Software |
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21 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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22 | # |
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23 | # $Id$ |
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24 | # |
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25 | # $Log$ |
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26 | # Revision 1.11 2004/12/03 12:34:28 jalet |
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27 | # Fixed the default value for the --savetoner command line option |
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28 | # |
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29 | # Revision 1.10 2004/11/17 13:28:19 jalet |
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30 | # Fixed some typo in the help |
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31 | # |
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32 | # Revision 1.9 2004/11/17 13:24:05 jalet |
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33 | # Improved pkbanner's help |
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34 | # |
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35 | # Revision 1.8 2004/11/17 13:12:04 jalet |
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36 | # Implemented the --savetoner command line option |
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37 | # |
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38 | # Revision 1.7 2004/11/15 22:29:01 jalet |
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39 | # Moved title and filename to the left to free some space. |
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40 | # |
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41 | # Revision 1.6 2004/11/15 22:20:27 jalet |
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42 | # Now outputs strings as-is, and not title-ized |
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43 | # |
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44 | # Revision 1.5 2004/11/15 22:01:34 jalet |
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45 | # Improved banner handling. |
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46 | # Fix for raw printing and banners. |
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47 | # |
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48 | # Revision 1.4 2004/11/15 19:59:34 jalet |
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49 | # PyKota banners now basically work ! |
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50 | # |
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51 | # Revision 1.3 2004/11/12 23:46:44 jalet |
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52 | # Heavy work on pkbanner. Not finished yet though, but mostly works. |
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53 | # |
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54 | # Revision 1.2 2004/11/11 14:25:48 jalet |
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55 | # Added some TODO comments |
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56 | # |
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57 | # Revision 1.1 2004/11/10 22:48:47 jalet |
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58 | # Banner generator's skeleton added |
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59 | # |
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60 | # |
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61 | # |
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62 | |
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63 | import sys |
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64 | import os |
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65 | import time |
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66 | import cStringIO |
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67 | import popen2 |
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68 | |
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69 | try : |
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70 | from reportlab.pdfgen import canvas |
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71 | from reportlab.lib import pagesizes |
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72 | from reportlab.lib.units import cm |
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73 | except ImportError : |
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74 | hasRL = 0 |
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75 | else : |
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76 | hasRL = 1 |
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77 | |
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78 | try : |
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79 | import PIL.Image |
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80 | except ImportError : |
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81 | hasPIL = 0 |
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82 | else : |
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83 | hasPIL = 1 |
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84 | |
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85 | from pykota.tool import Tool, PyKotaToolError, crashed, N_ |
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86 | |
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87 | __doc__ = N_("""pkbanner v%s (c) 2003-2004 C@LL - Conseil Internet & Logiciels Libres |
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88 | |
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89 | Generates banners. |
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90 | |
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91 | command line usage : |
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92 | |
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93 | pkbanner [options] |
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94 | |
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95 | options : |
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96 | |
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97 | -v | --version Prints pkbanner's version number then exits. |
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98 | -h | --help Prints this message then exits. |
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99 | |
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100 | -l | --logo img Use the image as the banner's logo. The logo will |
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101 | be drawn at the center top of the page. The default |
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102 | logo is /usr/share/pykota/logos/pykota.jpeg |
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103 | |
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104 | -p | --pagesize sz Sets sz as the page size. Most well known |
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105 | page sizes are recognized, like 'A4' or 'Letter' |
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106 | to name a few. The default size is A4. |
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107 | |
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108 | -s | --savetoner s Sets the text luminosity factor to s%%. This can be |
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109 | used to save toner. The default value is 0, which |
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110 | means that no toner saving will be done. |
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111 | |
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112 | -u | --url u Uses u as an url to be written at the bottom of |
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113 | the banner page. The default url is : |
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114 | http://www.librelogiciel.com/software/ |
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115 | |
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116 | examples : |
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117 | |
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118 | Using pkbanner directly from the command line is not recommended, |
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119 | excepted for testing purposes. You should use pkbanner in the |
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120 | 'startingbanner' or 'endingbanner' directives in pykota.conf |
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121 | |
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122 | startingbanner: /usr/bin/pkbanner --logo="" --savetoner=75 |
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123 | |
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124 | With such a setting in pykota.conf, all print jobs will be |
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125 | prefixed with an A4 banner with no logo, and text luminosity will |
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126 | be increased by 75%%. The PostScript output will be directly sent |
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127 | to your printer. |
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128 | |
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129 | You'll find more examples in the sample configuration file included |
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130 | in PyKota. |
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131 | |
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132 | This program is free software; you can redistribute it and/or modify |
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133 | it under the terms of the GNU General Public License as published by |
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134 | the Free Software Foundation; either version 2 of the License, or |
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135 | (at your option) any later version. |
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136 | |
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137 | This program is distributed in the hope that it will be useful, |
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138 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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139 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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140 | GNU General Public License for more details. |
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141 | |
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142 | You should have received a copy of the GNU General Public License |
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143 | along with this program; if not, write to the Free Software |
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144 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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145 | |
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146 | Please e-mail bugs to: %s""") |
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147 | |
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148 | class PyKotaBanner(Tool) : |
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149 | """A class for pkbanner.""" |
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150 | def getPageSize(self, pgsize) : |
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151 | """Returns the correct page size or None if not found.""" |
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152 | try : |
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153 | return getattr(pagesizes, pgsize.upper()) |
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154 | except AttributeError : |
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155 | try : |
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156 | return getattr(pagesizes, pgsize.lower()) |
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157 | except AttributeError : |
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158 | pass |
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159 | |
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160 | def getVar(self, varname) : |
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161 | """Extracts a variable from the environment and returns its value or 'Unknown' in the current locale.""" |
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162 | return os.environ.get(varname) or _("Unknown") |
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163 | |
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164 | def printVar(self, canvas, x, y, label, value, size, savetoner) : |
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165 | """Outputs a variable onto the PDF canvas. |
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166 | |
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167 | Returns the number of points to substract to current Y coordinate. |
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168 | """ |
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169 | canvas.saveState() |
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170 | canvas.setFont("Helvetica-Bold", size) |
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171 | (r, g, b) = [ color + (savetoner * (1.0 - color)) for color in (0, 0, 0) ] # Black * savetoner |
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172 | canvas.setFillColorRGB(r, g, b) |
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173 | message = "%s :" % _(label) |
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174 | canvas.drawRightString(x, y, message) |
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175 | canvas.setFont("Courier-Bold", size) |
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176 | (r, g, b) = [ color + (savetoner * (1.0 - color)) for color in (1, 0, 0) ] # Red * savetoner |
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177 | canvas.setFillColorRGB(r, g, b) |
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178 | canvas.drawString(x + 0.5*cm, y, value) |
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179 | canvas.restoreState() |
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180 | return (size + 4) |
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181 | |
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182 | def genPDF(self, pagesize, logo, url, savetoner) : |
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183 | """Generates the banner in PDF format, return the PDF document as a string.""" |
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184 | |
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185 | document = cStringIO.StringIO() |
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186 | c = canvas.Canvas(document, pagesize=pagesize, pageCompression=1) |
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187 | |
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188 | c.setAuthor("Jerome Alet") |
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189 | c.setTitle("PyKota generated Banner") |
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190 | c.setSubject("This is a print banner generated with PyKota") |
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191 | |
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192 | xcenter = pagesize[0] / 2.0 |
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193 | ycenter = pagesize[1] / 2.0 |
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194 | |
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195 | ypos = pagesize[1] - (2 * cm) |
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196 | |
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197 | if logo : |
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198 | try : |
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199 | imglogo = PIL.Image.open(logo) |
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200 | except : |
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201 | self.printInfo("Unable to open image %s" % logo, "warn") |
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202 | else : |
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203 | (width, height) = imglogo.size |
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204 | multi = float(width) / (8 * cm) |
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205 | width = float(width) / multi |
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206 | height = float(height) / multi |
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207 | xpos = xcenter - (width / 2.0) |
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208 | ypos -= height |
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209 | c.drawImage(logo, xpos, ypos, width, height) |
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210 | |
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211 | # New top |
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212 | xpos = pagesize[0] / 5.0 |
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213 | ypos -= (1 * cm) + 20 |
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214 | |
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215 | printername = self.getVar("PYKOTAPRINTERNAME") |
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216 | username = self.getVar("PYKOTAUSERNAME") |
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217 | accountbanner = self.config.getAccountBanner(printername) |
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218 | |
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219 | # Outputs the username |
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220 | ypos -= self.printVar(c, xcenter, ypos, _("Username"), username, 20, savetoner) |
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221 | |
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222 | # Printer and Job Id |
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223 | job = "%s - %s" % (printername, self.getVar("PYKOTAJOBID")) |
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224 | ypos -= self.printVar(c, xcenter, ypos, _("Job"), job, 14, savetoner) |
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225 | |
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226 | # Current date (TODO : at the time the banner was printed ! Change this to job's submission date) |
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227 | datetime = time.strftime("%c", time.localtime()) |
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228 | ypos -= self.printVar(c, xcenter, ypos, _("Date"), datetime, 14, savetoner) |
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229 | |
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230 | # Result of the print job |
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231 | action = self.getVar("PYKOTAACTION") |
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232 | if action == "ALLOW" : |
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233 | action = _("Allowed") |
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234 | elif action == "DENY" : |
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235 | action = _("Denied") |
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236 | elif action == "WARN" : |
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237 | action = _("Allowed with Warning") |
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238 | ypos -= self.printVar(c, xcenter, ypos, _("Result"), action, 14, savetoner) |
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239 | |
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240 | # skip some space |
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241 | ypos -= 20 |
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242 | |
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243 | # Outputs title and filename |
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244 | # We put them at x=0.25*pagewidth so that the line is long enough to hold them |
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245 | title = self.getVar("PYKOTATITLE") |
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246 | ypos -= self.printVar(c, xcenter / 2.0, ypos, _("Title"), title, 10, savetoner) |
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247 | |
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248 | filename = self.getVar("PYKOTAFILENAME") |
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249 | ypos -= self.printVar(c, xcenter / 2.0, ypos, _("Filename"), filename, 10, savetoner) |
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250 | |
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251 | # skip some space |
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252 | ypos -= 20 |
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253 | |
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254 | # Now outputs the user's account balance or page counter |
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255 | ypos -= self.printVar(c, xcenter, ypos, _("Pages printed so far on %s") % printername, self.getVar("PYKOTAPAGECOUNTER"), 14, savetoner) |
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256 | limitby = self.getVar("PYKOTALIMITBY") |
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257 | if limitby == "balance" : |
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258 | ypos -= self.printVar(c, xcenter, ypos, _("Account balance"), self.getVar("PYKOTABALANCE"), 14, savetoner) |
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259 | else : |
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260 | ypos -= self.printVar(c, xcenter, ypos, _("Soft Limit"), self.getVar("PYKOTASOFTLIMIT"), 14, savetoner) |
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261 | ypos -= self.printVar(c, xcenter, ypos, _("Hard Limit"), self.getVar("PYKOTAHARDLIMIT"), 14, savetoner) |
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262 | ypos -= self.printVar(c, xcenter, ypos, _("Date Limit"), self.getVar("PYKOTADATELIMIT"), 14, savetoner) |
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263 | |
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264 | # URL |
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265 | if url : |
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266 | c.saveState() |
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267 | c.setFont("Courier-Bold", 16) |
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268 | (r, g, b) = [ color + (savetoner * (1.0 - color)) for color in (0, 0, 1) ] # Blue * savetoner |
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269 | c.setFillColorRGB(r, g, b) |
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270 | c.drawCentredString(xcenter, 2 * cm, url) |
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271 | c.restoreState() |
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272 | |
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273 | c.showPage() |
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274 | c.save() |
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275 | return document.getvalue() |
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276 | |
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277 | def main(self, files, options) : |
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278 | """Generates a banner.""" |
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279 | if not hasRL : |
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280 | raise PyKotaToolError, "The ReportLab module is missing. Download it from http://www.reportlab.org" |
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281 | if not hasPIL : |
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282 | raise PyKotaToolError, "The Python Imaging Library is missing. Download it from http://www.pythonware.com/downloads" |
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283 | |
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284 | try : |
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285 | savetoner = int(options["savetoner"]) |
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286 | if (savetoner < 0) or (savetoner > 99) : |
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287 | raise ValueError, _("Allowed range is (0..99)") |
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288 | savetoner /= 100.0 |
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289 | except (TypeError, ValueError), msg : |
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290 | self.printInfo(_("Invalid 'savetoner' option %s : %s") % (options["savetoner"], msg), "warn") |
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291 | savetoner = 0.0 |
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292 | |
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293 | pagesize = self.getPageSize(options["pagesize"]) |
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294 | if pagesize is None : |
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295 | pagesize = self.getPageSize("a4") |
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296 | self.printInfo(_("Invalid 'pagesize' option %s, defaulting to A4.") % options["pagesize"], "warn") |
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297 | |
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298 | self.logdebug("Generating the banner in PDF format...") |
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299 | doc = self.genPDF(pagesize, options["logo"].strip(), options["url"].strip(), savetoner) |
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300 | |
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301 | self.logdebug("Converting the banner to PostScript...") |
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302 | os.environ["PATH"] = "%s:/bin:/usr/bin:/usr/local/bin:/opt/bin:/sbin:/usr/sbin" % os.environ.get("PATH", "") |
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303 | child = popen2.Popen3("gs -q -dNOPAUSE -dBATCH -dPARANOIDSAFER -sDEVICE=pswrite -sOutputFile=- - 2>/tmp/errgs") |
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304 | child.tochild.write(doc) |
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305 | child.tochild.close() |
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306 | sys.stdout.write(child.fromchild.read()) |
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307 | sys.stdout.flush() |
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308 | child.fromchild.close() |
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309 | status = child.wait() |
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310 | if os.WIFEXITED(status) : |
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311 | status = os.WEXITSTATUS(status) |
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312 | self.logdebug("PDF to PostScript converter exit code is %s" % str(status)) |
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313 | self.logdebug("Banner completed.") |
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314 | return status |
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315 | |
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316 | if __name__ == "__main__" : |
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317 | # TODO : --papertray : to print banners on a different paper (colored for example) |
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318 | retcode = 0 |
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319 | try : |
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320 | defaults = { \ |
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321 | "savetoner" : "0", \ |
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322 | "pagesize" : "a4", \ |
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323 | "logo" : "/usr/share/pykota/logos/pykota.jpeg", |
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324 | "url" : "http://www.librelogiciel.com/software/", |
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325 | } |
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326 | short_options = "vhs:l:p:u:" |
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327 | long_options = ["help", "version", "savetoner=", "pagesize=", "logo=", "url="] |
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328 | |
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329 | # Initializes the command line tool |
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330 | banner = PyKotaBanner(doc=__doc__) |
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331 | |
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332 | # parse and checks the command line |
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333 | (options, args) = banner.parseCommandline(sys.argv[1:], short_options, long_options, allownothing=1) |
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334 | |
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335 | # sets long options |
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336 | options["help"] = options["h"] or options["help"] |
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337 | options["version"] = options["v"] or options["version"] |
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338 | options["savetoner"] = options["s"] or options["savetoner"] or defaults["savetoner"] |
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339 | options["pagesize"] = options["p"] or options["pagesize"] or defaults["pagesize"] |
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340 | options["url"] = options["u"] or options["url"] or defaults["url"] |
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341 | |
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342 | options["logo"] = options["l"] or options["logo"] |
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343 | if options["logo"] is None : # Allows --logo="" to disable the logo entirely |
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344 | options["logo"] = defaults["logo"] |
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345 | |
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346 | if options["help"] : |
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347 | banner.display_usage_and_quit() |
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348 | elif options["version"] : |
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349 | banner.display_version_and_quit() |
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350 | else : |
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351 | retcode = banner.main(args, options) |
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352 | except SystemExit : |
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353 | pass |
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354 | except : |
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355 | try : |
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356 | banner.crashed("pkbanner failed") |
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357 | except : |
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358 | crashed("pkbanner failed") |
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359 | retcode = -1 |
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360 | |
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361 | sys.exit(retcode) |
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