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#! /usr/bin/env python
# Copyright (c) 2007-2008 PediaPress GmbH
# See README.txt for additional licensing information.
import os
import re
try:
from hashlib import md5
except ImportError:
from md5 import md5
from mwlib import texmap
import mwlib.log
log = mwlib.log.Log("rendermath")
latex = r"""
%% %(ident)s
\documentclass[%(fontsize)spt]{article}
%(extra_header)s
\usepackage{ucs}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
%% \newcommand{\R}[0]{\mathbb{R}}
\def\Alpha{{A{}}}
\def\Beta{{B{}}}
\def\Epsilon{{E{}}}
\def\Zeta{{Z{}}}
\def\Eta{{H{}}}
\def\Iota{{I{}}}
\def\Kappa{{K{}}}
\def\Mu{{M{}}}
\def\Nu{{N{}}}
\def\Rho{{P{}}}
\def\Tau{{T{}}}
\def\Chi{{C{}}}
\usepackage[utf8x]{inputenc}
\usepackage[dvips]{graphicx}
\pagestyle{empty}
\begin{document}
%(source)s
\end{document}
"""
def mysystem(cmd):
err=os.system(cmd)
if err:
raise RuntimeError("exit code %s while running %r" % (err, cmd))
class Renderer(object):
basedir = os.path.expanduser("~/pngmath/")
def __init__(self, basedir=None, lazy=True):
if basedir:
self.basedir = os.path.realpath(os.path.join(basedir, 'pngmath/'))
if not os.path.exists(self.basedir):
#os.makedirs(self.basedir)
pass
self.lazy = lazy
def _render_file(self, name, format):
assert format in ('pdf', 'png', 'eps'), "rendermath: format %r not supported" % format
texfile = os.path.join(self.basedir, name+'.tex')
srcbase = os.path.join(self.basedir, name)
cwd = os.getcwd()
os.chdir(self.basedir)
try:
mysystem("latex -interaction=batchmode %s" % texfile)
mysystem("dvips -E %s.dvi -o %s.ps" % (srcbase, srcbase))
if format=='png':
mysystem("convert +adjoin -transparent white -density 300x300 %s.ps %s.png" % (srcbase, srcbase))
elif format=='pdf':
mysystem("epstopdf %s.ps" % srcbase)
elif format=='eps':
os.rename("%s.ps" % srcbase, "%s.eps" % srcbase)
finally:
for x in ['.dvi', '.aux', '.log', '.ps']:
p = os.path.join(self.basedir, name+x)
try:
os.unlink(p)
except OSError, err:
pass
os.chdir(cwd)
def _normalizeLatex(self, latexsource):
latexsource = re.compile("\n+").sub("\n", latexsource)
return latexsource
def convert(self, latexsource, lazy=True, format='pdf', addMathEnv=True):
assert format in ('pdf', 'png', 'eps'), "rendermath: format %r not supported" % format
latexsource = self._normalizeLatex(latexsource)
if addMathEnv:
latexsource = '$' + latexsource + '$'
if format in ('pdf', 'eps'):
extra_header = '\usepackage{geometry}\n\geometry{textwidth=3.0in}\n'
fontsize = 10
else:
fontsize = 12
extra_header = ''
latexsource = texmap.convertSymbols(latexsource)
source = latex % dict(source=latexsource,
ident=format,
fontsize=fontsize,
extra_header=extra_header)
m=md5()
m.update(source)
name = m.hexdigest()
srcbase = os.path.join(self.basedir, name)
texfile = os.path.join(self.basedir, name+'.tex')
outfile = os.path.join(self.basedir, name+'.'+format)
if os.path.exists(outfile):
return outfile # FIXME
open(texfile, 'w').write(source)
if not lazy:
self._render_file(name, format)
return outfile
def render(self, latexsource, lazy=None, addMathEnv=True):
if lazy is None:
lazy = self.lazy
return self.convert(latexsource, lazy=lazy, format='png', addMathEnv=addMathEnv)
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