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__all__ = ['math', 'math_in_quote', 'math_in_list']
BLOCK_MATH_PATTERN = r'^ {0,3}\$\$[ \t]*\n(?P<math_text>[\s\S]+?)\n\$\$[ \t]*$'
INLINE_MATH_PATTERN = r'\$(?!\s)(?P<math_text>.+?)(?!\s)\$'
def parse_block_math(block, m, state):
text = m.group('math_text')
state.append_token({'type': 'block_math', 'raw': text})
return m.end() + 1
def parse_inline_math(inline, m, state):
text = m.group('math_text')
state.append_token({'type': 'inline_math', 'raw': text})
return m.end()
def render_block_math(renderer, text):
return '<div class="math">$$\n' + text + '\n$$</div>\n'
def render_inline_math(renderer, text):
return r'<span class="math">\(' + text + r'\)</span>'
def math(md):
"""A mistune plugin to support math. The syntax is used
by many markdown extensions:
.. code-block:: text
Block math is surrounded by $$:
$$
f(a)=f(b)
$$
Inline math is surrounded by `$`, such as $f(a)=f(b)$
:param md: Markdown instance
"""
md.block.register('block_math', BLOCK_MATH_PATTERN, parse_block_math, before='list')
md.inline.register('inline_math', INLINE_MATH_PATTERN, parse_inline_math, before='link')
if md.renderer and md.renderer.NAME == 'html':
md.renderer.register('block_math', render_block_math)
md.renderer.register('inline_math', render_inline_math)
def math_in_quote(md):
"""Enable block math plugin in block quote."""
md.block.insert_rule(md.block.block_quote_rules, 'block_math', before='list')
def math_in_list(md):
"""Enable block math plugin in list."""
md.block.insert_rule(md.block.list_rules, 'block_math', before='list')
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