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81 lines
3.2 KiB
Python
81 lines
3.2 KiB
Python
#
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# Copyright (c) 2017 Intel Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# -*- coding: utf-8 -*-
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'''
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Math extension for Python-Markdown
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==================================
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Adds support for displaying math formulas using [MathJax](http://www.mathjax.org/).
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Author: 2015, Dmitry Shachnev <mitya57@gmail.com>.
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'''
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import markdown
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class MathExtension(markdown.extensions.Extension):
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def __init__(self, *args, **kwargs):
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self.config = {
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'enable_dollar_delimiter': [False, 'Enable single-dollar delimiter'],
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'render_to_span': [False,
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'Render to span elements rather than script for fallback'],
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}
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super(MathExtension, self).__init__(*args, **kwargs)
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def extendMarkdown(self, md, md_globals):
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def handle_match_inline(m):
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if self.getConfig('render_to_span'):
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node = markdown.util.etree.Element('span')
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node.set('class', 'tex')
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node.text = ("\\\\(" + markdown.util.AtomicString(m.group(3)) +
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"\\\\)")
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else:
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node = markdown.util.etree.Element('script')
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node.set('type', 'math/tex')
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node.text = markdown.util.AtomicString(m.group(3))
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return node
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def handle_match(m):
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node = markdown.util.etree.Element('script')
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node.set('type', 'math/tex; mode=display')
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if '\\begin' in m.group(2):
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node.text = markdown.util.AtomicString(m.group(2) + m.group(4) + m.group(5))
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else:
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node.text = markdown.util.AtomicString(m.group(3))
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return node
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inlinemathpatterns = (
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markdown.inlinepatterns.Pattern(r'(?<!\\|\$)(\$)([^\$]+)(\$)'), # $...$
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markdown.inlinepatterns.Pattern(r'(?<!\\)(\\\()(.+?)(\\\))') # \(...\)
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)
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mathpatterns = (
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markdown.inlinepatterns.Pattern(r'(?<!\\)(\$\$)([^\$]+)(\$\$)'), # $$...$$
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markdown.inlinepatterns.Pattern(r'(?<!\\)(\\\[)(.+?)(\\\])'), # \[...\]
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markdown.inlinepatterns.Pattern(r'(?<!\\)(\\begin{([a-z]+?\*?)})(.+?)(\\end{\3})')
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)
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if not self.getConfig('enable_dollar_delimiter'):
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inlinemathpatterns = inlinemathpatterns[1:]
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for i, pattern in enumerate(inlinemathpatterns):
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pattern.handleMatch = handle_match_inline
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md.inlinePatterns.add('math-inline-%d' % i, pattern, '<escape')
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for i, pattern in enumerate(mathpatterns):
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pattern.handleMatch = handle_match
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md.inlinePatterns.add('math-%d' % i, pattern, '<escape')
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def makeExtension(*args, **kwargs):
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return MathExtension(*args, **kwargs)
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