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# coding: utf-8
import os
import re
import copy
import mistune0
root = os.path.dirname(__file__)
class MathBlockGrammar(mistune0.BlockGrammar):
block_math = re.compile(r'^\$\$(.*?)\$\$', re.DOTALL)
latex_environment = re.compile(
r"^\\begin\{([a-z]*\*?)\}(.*?)\\end\{\1\}",
re.DOTALL
)
class MathBlockLexer(mistune0.BlockLexer):
default_rules = ['block_math', 'latex_environment'] + \
mistune0.BlockLexer.default_rules
def __init__(self, rules=None, **kwargs):
if rules is None:
rules = MathBlockGrammar()
super(MathBlockLexer, self).__init__(rules, **kwargs)
def parse_block_math(self, m):
"""Parse a $$math$$ block"""
self.tokens.append({
'type': 'block_math',
'text': m.group(1)
})
def parse_latex_environment(self, m):
self.tokens.append({
'type': 'latex_environment',
'name': m.group(1),
'text': m.group(2)
})
class MathInlineGrammar(mistune0.InlineGrammar):
math = re.compile(r'^\$(.+?)\$')
text = re.compile(r'^[\s\S]+?(?=[\\<!\[_*`~$]|https?://| {2,}\n|$)')
class MathInlineLexer(mistune0.InlineLexer):
default_rules = ['math'] + mistune0.InlineLexer.default_rules
def __init__(self, renderer, rules=None, **kwargs):
if rules is None:
rules = MathInlineGrammar()
super(MathInlineLexer, self).__init__(renderer, rules, **kwargs)
def output_math(self, m):
return self.renderer.inline_math(m.group(1))
class MarkdownWithMath(mistune0.Markdown):
def __init__(self, renderer, **kwargs):
if 'inline' not in kwargs:
kwargs['inline'] = MathInlineLexer
if 'block' not in kwargs:
kwargs['block'] = MathBlockLexer
super(MarkdownWithMath, self).__init__(renderer, **kwargs)
def output_block_math(self):
return self.renderer.block_math(self.token['text'])
def output_latex_environment(self):
return self.renderer.latex_environment(
self.token['name'], self.token['text']
)
class MathRenderer(mistune0.Renderer):
def block_math(self, text):
return '$$%s$$' % text
def latex_environment(self, name, text):
return r'\begin{%s}%s\end{%s}' % (name, text, name)
def inline_math(self, text):
return '$%s$' % text
def assert_data(filename):
if filename.endswith('.md'):
filename = os.path.join(root, 'fixtures', 'data', filename)
with open(filename) as f:
text = f.read().strip()
else:
text = filename
rv = MarkdownWithMath(renderer=MathRenderer()).render(text)
assert text in rv
def test_simple_math():
assert_data("$$\na = 1 *3* 5\n$$")
assert_data("$ a = 1 *3* 5 $")
def test_markdown2html_math():
# Mathematical expressions should be passed through unaltered
assert_data('math.md')
def test_math_paragraph():
# https://github.com/ipython/ipython/issues/6724
assert_data('math-paragraph.md')
class WikiInlineGrammar(mistune0.InlineGrammar):
# it would take a while for creating the right regex
wiki_link = re.compile(
r'\[\[' # [[
r'([\s\S]+?\|[\s\S]+?)' # Page 2|Page 2
r'\]\](?!\])' # ]]
)
class WikiInlineLexer(mistune0.InlineLexer):
default_rules = copy.copy(mistune0.InlineLexer.default_rules)
default_rules.insert(3, 'wiki_link')
def __init__(self, renderer, rules=None, **kwargs):
if rules is None:
rules = WikiInlineGrammar()
super(WikiInlineLexer, self).__init__(renderer, rules, **kwargs)
def output_wiki_link(self, m):
text = m.group(1)
alt, link = text.split('|')
return '<a href="%s">%s</a>' % (link, alt)
def test_custom_lexer():
markdown = mistune0.Markdown(inline=WikiInlineLexer)
ret = markdown('[[Link Text|Wiki Link]]')
assert '<a href' in ret
class TokenTreeRenderer(mistune0.Renderer):
# options is required
options = {}
def placeholder(self):
return []
def __getattribute__(self, name):
"""Saves the arguments to each Markdown handling method."""
found = TokenTreeRenderer.__dict__.get(name)
if found is not None:
return object.__getattribute__(self, name)
def fake_method(*args, **kwargs):
return [(name, args, kwargs)]
return fake_method
def test_token_tree():
"""Tests a Renderer that returns a list from the placeholder method."""
with open(os.path.join(root, 'fixtures', 'data', 'tree.md')) as f:
content = f.read()
expected = [
('header', ([('text', ('Title here',), {})], 2, 'Title here'), {}),
('paragraph', ([('text', ('Some text.',), {})],), {}),
('paragraph',
([('text', ('In two paragraphs. And then a list.',), {})],),
{}),
('list',
([('list_item', ([('text', ('foo',), {})],), {}),
('list_item',
([('text', ('bar',), {}),
('list',
([('list_item', ([('text', ('meep',), {})],), {}),
('list_item', ([('text', ('stuff',), {})],), {})],
True),
{})],),
{})],
False),
{})
]
processor = mistune0.Markdown(renderer=TokenTreeRenderer())
found = processor.render(content)
assert expected == found, "Expected:\n%r\n\nFound:\n%r" % (expected, found)
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