share/extensions/eqtexsvg.py

   1 #!/usr/bin/env python
   2 # -*- coding: cp1252 -*-
   3 """
   4 EQTEXSVG.py
   5 functions for converting LATEX equation string into SVG path
   6 This extension need, to work properly :
   7     - a TEX/LATEX distribution (MiKTEX ...)
   8     - pstoedit software: <http://www.pstoedit.net/pstoedit>
   9
  10 Copyright (C) 2006 Julien Vitard, julienvitard@gmail.com
  11
  12 - I will try to code XML parsing, not the hard way ;-)
  13
  14 This program is free software; you can redistribute it and/or modify
  15 it under the terms of the GNU General Public License as published by
  16 the Free Software Foundation; either version 2 of the License, or
  17 (at your option) any later version.
  18
  19 This program is distributed in the hope that it will be useful,
  20 but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 GNU General Public License for more details.
  23
  24 You should have received a copy of the GNU General Public License
  25 along with this program; if not, write to the Free Software
  26 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  27
  28 """
  29
  30 import inkex, os, tempfile
  31
  32 def create_equation_tex(filename, equation):
  33         tex = open(filename, 'w')
  34         tex.write("""%% processed with EqTeXSVG.py
  35 \documentclass{article}
  36
  37 \\thispagestyle{empty}
  38 \\begin{document}
  39 """)
  40         tex.write("$$\n")
  41         tex.write(equation)
  42         tex.write("\n$$\n")
  43         tex.write("\end{document}\n")
  44         tex.close()
  45
  46 def svg_open(self,filename):
  47 # parsing of SVG file with the equation
  48 # real parsing XML to use!!!! it will be easier !!!
  49         svg = open(filename, 'r')
  50         svg_lines = svg.readlines()
  51
  52 # trip top/bottom lines from svg file
  53         svg_lines.pop(0)
  54         svg_lines.pop(1)
  55         svg_lines.pop(len(svg_lines)-1)
  56
  57         group = self.document.createElement('svg:g')
  58         self.document.documentElement.appendChild(group)
  59
  60 # deleting "<g... >" "</g>" "<path d=" and "/>" from svg_lines
  61         nodegroup=''
  62         s_nodegroup_path=''
  63
  64         for i in range(1,len(svg_lines)):
  65             if svg_lines[i].find("<g") != -1:
  66                 nodegroup=svg_lines[i].split("<g")
  67                 nodegroup=nodegroup[1].split(" >")
  68                 nodegroup=nodegroup[0]+'\n'
  69             elif svg_lines[i].find("<path d=") != -1:
  70                 s_nodegroup_path=svg_lines[i].split("<path d=")
  71                 s_nodegroup_path=s_nodegroup_path[1]
  72             elif svg_lines[i].find("/>") != -1:
  73                 s_nodegroup_path=s_nodegroup_path+'"\n'
  74             elif svg_lines[i].find("</g>") != -1:
  75                 nodegroup_svg = self.document.createElement('svg:g')
  76                 nodegroup_svg.setAttribute('style',nodegroup)
  77                 nodegroup_path = self.document.createElement('svg:path')
  78                 nodegroup_path.setAttribute('d',s_nodegroup_path)
  79                 group.appendChild(nodegroup_svg)
  80                 nodegroup_svg.appendChild(nodegroup_path)
  81             else:
  82                 s_nodegroup_path=s_nodegroup_path+svg_lines[i]
  83
  84 class EQTEXSVG(inkex.Effect):
  85         def __init__(self):
  86                 inkex.Effect.__init__(self)
  87                 self.OptionParser.add_option("-f", "--formule",
  88                                                 action="store", type="string",
  89                                                 dest="formule", default=10.0,
  90                                                 help="Formule LaTeX")
  91         def effect(self):
  92
  93                 base_file = os.path.join(tempfile.gettempdir(), "inkscape-latex.tmp")
  94                 latex_file = base_file + ".tex"
  95                 create_equation_tex(latex_file, self.options.formule)
  96
  97                 out_file = os.path.join(tempfile.gettempdir(), "inkscape-latex.tmp.output")
  98                 os.system('latex -output-directory=' + tempfile.gettempdir() + ' ' + latex_file + '> ' + out_file)
  99
 100                 ps_file = base_file + ".ps"
 101                 dvi_file = base_file + ".dvi"
 102                 svg_file = base_file + ".svg"
 103                 os.system('dvips -q -f -E -D 600 -y 5000 -o ' + ps_file + ' ' + dvi_file)
 104                 os.system('pstoedit -f svg -dt -ssp ' + ps_file + ' ' + svg_file + '>> ' + out_file)
 105
 106                 # ouvrir le svg et remplacer #7F7F7F par #000000
 107                 svg_open(self, svg_file)
 108
 109               # clean up
 110                 aux_file = base_file + ".aux"
 111                 log_file = base_file + ".log"
 112                 os.remove(latex_file)
 113                 os.remove(aux_file)
 114                 os.remove(log_file)
 115                 os.remove(dvi_file)
 116                 os.remove(ps_file)
 117                 os.remove(svg_file)
 118                 os.remove(out_file)
 119
 120 e = EQTEXSVG()
 121 e.affect()