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-rw-r--r--mdx/mdx_fenced_code.py105
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diff --git a/mdx/mdx_fenced_code.py b/mdx/mdx_fenced_code.py
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--- a/mdx/mdx_fenced_code.py
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-#!/usr/bin/env python
-
-"""
-Fenced Code Extension for Python Markdown
-=========================================
-
-This extension adds Fenced Code Blocks to Python-Markdown.
-
- >>> import markdown
- >>> text = '''
- ... A paragraph before a fenced code block:
- ...
- ... ~~~
- ... Fenced code block
- ... ~~~
- ... '''
- >>> html = markdown.markdown(text, extensions=['fenced_code'])
- >>> html
- u'<p>A paragraph before a fenced code block:\\n</p>\\n<pre><code>Fenced code block\\n</code></pre>'
-
-Works with safe_mode also (we check this because we are using the HtmlStash):
-
- >>> markdown.markdown(text, extensions=['fenced_code'], safe_mode='replace')
- u'<p>A paragraph before a fenced code block:\\n</p>\\n<pre><code>Fenced code block\\n</code></pre>'
-
-Include tilde's in a code block and wrap with blank lines:
-
- >>> text = '''
- ... ~~~~~~~~
- ...
- ... ~~~~
- ...
- ... ~~~~~~~~'''
- >>> markdown.markdown(text, extensions=['fenced_code'])
- u'<pre><code>\\n~~~~\\n\\n</code></pre>'
-
-Multiple blocks and language tags:
-
- >>> text = '''
- ... ~~~~
- ... block one
- ... ~~~~{.python}
- ...
- ... ~~~~
- ... <p>block two</p>
- ... ~~~~{.html}'''
- >>> markdown.markdown(text, extensions=['fenced_code'])
- u'<pre><code class="python">block one\\n</code></pre>\\n\\n<pre><code class="html">&lt;p&gt;block two&lt;/p&gt;\\n</code></pre>'
-
-"""
-
-import markdown, re
-
-# Global vars
-FENCED_BLOCK_RE = re.compile( \
- r'(?P<fence>^~{3,})[ ]*\n(?P<code>.*?)(?P=fence)[ ]*(\{\.(?P<lang>[a-zA-Z0-9_-]*)\})?[ ]*$',
- re.MULTILINE|re.DOTALL
- )
-CODE_WRAP = '<pre><code%s>%s</code></pre>'
-LANG_TAG = ' class="%s"'
-
-
-class FencedCodeExtension(markdown.Extension):
-
- def extendMarkdown(self, md, md_globals):
- """ Add FencedBlockPreprocessor to the Markdown instance. """
-
- FENCED_BLOCK_PREPROCESSOR = FencedBlockPreprocessor()
- FENCED_BLOCK_PREPROCESSOR.md = md
- md.textPreprocessors.insert(0, FENCED_BLOCK_PREPROCESSOR)
-
-
-class FencedBlockPreprocessor(markdown.TextPreprocessor):
-
- def run(self, text):
- """ Match and store Fenced Code Blocks in the HtmlStash. """
- while 1:
- m = FENCED_BLOCK_RE.search(text)
- if m:
- lang = ''
- if m.group('lang'):
- lang = LANG_TAG % m.group('lang')
- code = CODE_WRAP % (lang, self._escape(m.group('code')))
- placeholder = self.md.htmlStash.store(code, safe=True)
- text = '%s\n%s\n%s'% (text[:m.start()], placeholder, text[m.end():])
- else:
- break
- return text
-
- def _escape(self, txt):
- """ basic html escaping """
- txt = txt.replace('&', '&amp;')
- txt = txt.replace('<', '&lt;')
- txt = txt.replace('>', '&gt;')
- txt = txt.replace('"', '&quot;')
- return txt
-
-
-def makeExtension(configs=None):
- return FencedCodeExtension()
-
-
-if __name__ == "__main__":
- import doctest
- doctest.testmod()