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# This program is public domain
# Author: Paul Kienzle
r"""
Allow $math$ markup in text and docstrings, ignoring \$.
The $math$ markup should be separated from the surrounding text by spaces.
To embed markup within a word, place backslash-space before and after. For
convenience, the final $ can be followed by punctuation (period, comma or
semicolon).
"""
import re
_DOLLAR = re.compile(
r"(?:^|(?<=\s|[-(]))[$]([^\n]*?)(?<![\\])[$](?:$|(?=\s|[-.,;:?\\)]))")
_NOTDOLLAR = re.compile(r"\\[$]")
def replace_dollar(content):
#original = content
content = _DOLLAR.sub(r":math:`\1`", content)
content = _NOTDOLLAR.sub("$", content)
#if '$' in content:
# import sys
# sys.stdout.write("\n========> not converted\n")
# sys.stdout.write(content)
# sys.stdout.write("\n")
#elif '$' in original:
# import sys
# sys.stdout.write("\n========> converted\n")
# sys.stdout.write(content)
# sys.stdout.write("\n")
return content
def rewrite_rst(app, docname, source):
source[0] = replace_dollar(source[0])
def rewrite_autodoc(app, what, name, obj, options, lines):
lines[:] = [replace_dollar(L) for L in lines]
def setup(app):
app.connect('source-read', rewrite_rst)
app.connect('autodoc-process-docstring', rewrite_autodoc)
def test_dollar():
assert replace_dollar(u"no dollar") == u"no dollar"
assert replace_dollar(u"$only$") == u":math:`only`"
assert replace_dollar(u"$first$ is good") == u":math:`first` is good"
assert replace_dollar(u"so is $last$") == u"so is :math:`last`"
assert replace_dollar(u"and $mid$ too") == u"and :math:`mid` too"
assert (replace_dollar(u"$first$, $mid$, $last$")
== u":math:`first`, :math:`mid`, :math:`last`")
assert replace_dollar(u"dollar\\$ escape") == u"dollar$ escape"
assert replace_dollar(u"dollar \\$escape\\$ too") == u"dollar $escape$ too"
assert (replace_dollar(u"spaces $in the$ math")
== u"spaces :math:`in the` math")
assert replace_dollar(u"emb\\ $ed$\\ ed") == u"emb\\ :math:`ed`\\ ed"
assert replace_dollar(u"$first$a") == u"$first$a"
assert replace_dollar(u"a$last$") == u"a$last$"
assert replace_dollar(u"$37") == u"$37"
assert replace_dollar(u"($37)") == u"($37)"
assert replace_dollar(u"$37 - $43") == u"$37 - $43"
assert replace_dollar(u"($37, $38)") == u"($37, $38)"
assert replace_dollar(u"a $mid$dle a") == u"a $mid$dle a"
assert replace_dollar(u"a ($in parens$) a") == u"a (:math:`in parens`) a"
assert (replace_dollar(u"a (again $in parens$) a")
== u"a (again :math:`in parens`) a")
if __name__ == "__main__":
test_dollar()
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