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"""
Math extension for Python-Markdown
==================================
Adds support for displaying math formulas using [MathJax](http://www.mathjax.org/).
Author: 2015, Dmitry Shachnev <mitya57@gmail.com>.
"""
import markdown
class MathExtension(markdown.extensions.Extension):
def __init__(self, *args, **kwargs):
self.config = {
"enable_dollar_delimiter": [False, "Enable single-dollar delimiter"],
}
super().__init__(*args, **kwargs)
def extendMarkdown(self, md, md_globals):
def handle_match_inline(m):
node = markdown.util.etree.Element("script")
node.set("type", "math/tex")
node.text = markdown.util.AtomicString(m.group(3))
return node
def handle_match(m):
node = markdown.util.etree.Element("script")
node.set("type", "math/tex; mode=display")
if "\\begin" in m.group(2):
node.text = markdown.util.AtomicString(
m.group(2) + m.group(4) + m.group(5)
)
else:
node.text = markdown.util.AtomicString(m.group(3))
return node
configs = self.getConfigs()
inlinemathpatterns = (
markdown.inlinepatterns.Pattern(r"(?<!\\|\$)(\$)([^\$]+)(\$)"), # $...$
markdown.inlinepatterns.Pattern(r"(?<!\\)(\\\()(.+?)(\\\))"), # \(...\)
)
mathpatterns = (
markdown.inlinepatterns.Pattern(r"(?<!\\)(\$\$)([^\$]+)(\$\$)"), # $$...$$
markdown.inlinepatterns.Pattern(r"(?<!\\)(\\\[)(.+?)(\\\])"), # \[...\]
markdown.inlinepatterns.Pattern(
r"(?<!\\)(\\begin{([a-z]+?\*?)})(.+?)(\\end{\3})"
),
)
if not configs["enable_dollar_delimiter"]:
inlinemathpatterns = inlinemathpatterns[1:]
for i, pattern in enumerate(inlinemathpatterns):
pattern.handleMatch = handle_match_inline
md.inlinePatterns.add("math-inline-%d" % i, pattern, "<escape")
for i, pattern in enumerate(mathpatterns):
pattern.handleMatch = handle_match
md.inlinePatterns.add("math-%d" % i, pattern, "<escape")
def makeExtension(*args, **kwargs):
return MathExtension(*args, **kwargs)
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