1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
"""A simple tool for embedding LaTeX in XHTML documents.
This script lets you embed LaTeX code between <div> and <span> tags. Example:
<div class="eq>
y = \int_0^\infty \gamma^2 \cos(x) dx
</div>
<p> An inline equation <span class="eq">y^2=x^2+\alpha^2</span> here.</p>
The script extracts the equations, creates a temporary LaTeX document,
compiles it, saves the equations as images and replaces the original markup
with images.
Usage:
python eqhtml.py source dest
Process source and save result in dest. Note that no error checking is
performed.
"""
import os, sys
# Include your favourite LaTeX packages and commands here
tex_preamble = r'''
\documentclass{article}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{bm}
\newcommand{\mx}[1]{\mathbf{\bm{#1}}} % Matrix command
\newcommand{\vc}[1]{\mathbf{\bm{#1}}} % Vector command
\newcommand{\T}{\text{T}} % Transpose
\pagestyle{empty}
\begin{document}
'''
imgpath = 'equation/' # path to generated equations. e.q 'img/'
# get source and dest filenames from command line
sourcefn = sys.argv[1]
destfn = sys.argv[2]
sourcefn_base = os.path.splitext(os.path.basename(sourcefn))[0]
# change working directory to the same as source's
cwd = os.getcwd()
os.chdir(os.path.abspath(os.path.dirname(sourcefn)))
sourcefn = os.path.basename(sourcefn)
texfn = sourcefn_base+'.tex'
print "Processing %s" % sourcefn
# load source document
f = open(sourcefn)
docphp = f.readlines();
f.close()
# find all elements with attribute class='eq'
# eqs will contain all the equations
eqs = []
chaine_debut = '<div class="eq">'
chaine_fin = '</div>'
lecture_equation = 0
# new lines will be written in newdoc_php
newdoc_php = []
counter = 0
for ligne in docphp:
if chaine_debut in ligne:
# beginning of an equation
lecture_equation = 1
counter = counter+1
# delete LaTeX code from the document, and replace
# them by image urls.
imgname = "%seq%s%i.png" % (imgpath, sourcefn_base, counter)
ligne_image = '<div class="eq"><img alt="" src="%s" /></div>\n' % (imgname)
newdoc_php.append(ligne_image)
# initialization of eq (on the first line, no latex symbols)
eq = ""
elif (lecture_equation == 1):
if chaine_fin in ligne:
# end of the equation
index = ligne.find(chaine_fin);
eq = eq + (ligne[0:index]);
lecture_equation = 0
eqs.append(eq)
else:
eq = eq + ligne
else:
newdoc_php.append(ligne)
# equations are now available in the eqs[..] variable
# create a LaTeX document and insert equations
f = open(texfn,'w')
f.write(tex_preamble)
counter = 1
for eq in eqs:
f.write("\\[ %s \\] \n \\newpage \n" % eq)
counter += 1
# end LaTeX document
f.write('\end{document}')
f.close()
# compile LaTeX document. A DVI file is created
os.system('latex %s' % texfn)
# Run dvipng on the generated DVI file. Use tight bounding box.
# Magnification is set to 1200
cmd = "dvipng -T tight -x 1200 -z 9 -bg transparent " \
+ "-o %seq%s%%d.png %s" % (imgpath , sourcefn_base, sourcefn_base)
os.system(cmd)
# Remove temporary files
os.remove(sourcefn_base+'.tex')
os.remove(sourcefn_base+'.log')
os.remove(sourcefn_base+'.aux')
os.remove(sourcefn_base+'.dvi')
os.chdir(cwd)
# Write processed source document to dest
f = open(destfn,'w')
for ligne in newdoc_php:
f.write(ligne)
f.close()
print "Done." |
ElementTree probleme de parsage d'un document html
Répondre avec citation
Partager