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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# :Id: $Id: tex2mathml_extern.py 8376 2019-08-27 19:49:29Z milde $
# :Copyright: © 2015 Günter Milde.
# :License: Released under the terms of the `2-Clause BSD license`_, in short:
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.
# This file is offered as-is, without any warranty.
#
# .. _2-Clause BSD license: http://www.spdx.org/licenses/BSD-2-Clause
# Wrappers for TeX->MathML conversion by external tools
# =====================================================
from __future__ import print_function
import subprocess
document_template = r"""\documentclass{article}
\usepackage{amsmath}
\begin{document}
%s
\end{document}
"""
def latexml(math_code, reporter=None):
"""Convert LaTeX math code to MathML with LaTeXML_
.. _LaTeXML: http://dlmf.nist.gov/LaTeXML/
"""
p = subprocess.Popen(['latexml',
'-', # read from stdin
# '--preload=amsmath',
'--inputencoding=utf8',
],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
p.stdin.write((document_template % math_code).encode('utf8'))
p.stdin.close()
latexml_code = p.stdout.read()
latexml_err = p.stderr.read().decode('utf8')
if reporter and (latexml_err.find('Error') >= 0 or not latexml_code):
reporter.error(latexml_err)
post_p = subprocess.Popen(['latexmlpost',
'-',
'--nonumbersections',
'--format=xhtml',
# '--linelength=78', # experimental
'--'
],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
post_p.stdin.write(latexml_code)
post_p.stdin.close()
result = post_p.stdout.read().decode('utf8')
post_p_err = post_p.stderr.read().decode('utf8')
if reporter and (post_p_err.find('Error') >= 0 or not result):
reporter.error(post_p_err)
# extract MathML code:
start, end = result.find('<math'), result.find('</math>')+7
result = result[start:end]
if 'class="ltx_ERROR' in result:
raise SyntaxError(result)
return result
def ttm(math_code, reporter=None):
"""Convert LaTeX math code to MathML with TtM_
.. _TtM: http://hutchinson.belmont.ma.us/tth/mml/
"""
p = subprocess.Popen(['ttm',
# '-i', # italic font for equations. Default roman.
'-u', # unicode character encoding. (Default iso-8859-1).
'-r', # output raw MathML (no preamble or postlude)
],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
p.stdin.write((document_template % math_code).encode('utf8'))
p.stdin.close()
result = p.stdout.read()
err = p.stderr.read().decode('utf8')
if err.find('**** Unknown') >= 0:
msg = '\n'.join([line for line in err.splitlines()
if line.startswith('****')])
raise SyntaxError('\nMessage from external converter TtM:\n'+ msg)
if reporter and err.find('**** Error') >= 0 or not result:
reporter.error(err)
start, end = result.find('<math'), result.find('</math>')+7
result = result[start:end]
return result
def blahtexml(math_code, inline=True, reporter=None):
"""Convert LaTeX math code to MathML with blahtexml_
.. _blahtexml: http://gva.noekeon.org/blahtexml/
"""
options = ['--mathml',
'--indented',
'--spacing', 'moderate',
'--mathml-encoding', 'raw',
'--other-encoding', 'raw',
'--doctype-xhtml+mathml',
'--annotate-TeX',
]
if inline:
mathmode_arg = ''
else:
mathmode_arg = 'mode="display"'
options.append('--displaymath')
p = subprocess.Popen(['blahtexml']+options,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
p.stdin.write(math_code.encode('utf8'))
p.stdin.close()
result = p.stdout.read().decode('utf8')
err = p.stderr.read().decode('utf8')
if result.find('<error>') >= 0:
raise SyntaxError('\nMessage from external converter blahtexml:\n'
+result[result.find('<message>')+9:result.find('</message>')])
if reporter and (err.find('**** Error') >= 0 or not result):
reporter.error(err)
start, end = result.find('<markup>')+9, result.find('</markup>')
result = ('<math xmlns="http://www.w3.org/1998/Math/MathML"%s>\n'
'%s</math>\n') % (mathmode_arg, result[start:end])
return result
# self-test
if __name__ == "__main__":
example = (u'\\frac{\\partial \\sin^2(\\alpha)}{\\partial \\vec r}'
u'\\varpi \\, \\text{Grüße}')
# print(latexml(example).encode('utf8'))
# print(ttm(example))
print(blahtexml(example).encode('utf8'))
|
