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# -*- coding: utf-8 -*-
'''
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(MathExtension, self).__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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