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