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67 lines
2.5 KiB
67 lines
2.5 KiB
""" |
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Python Markdown |
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A Python implementation of John Gruber's Markdown. |
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Documentation: https://python-markdown.github.io/ |
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GitHub: https://github.com/Python-Markdown/markdown/ |
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PyPI: https://pypi.org/project/Markdown/ |
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Started by Manfred Stienstra (http://www.dwerg.net/). |
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Maintained for a few years by Yuri Takhteyev (http://www.freewisdom.org). |
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Currently maintained by Waylan Limberg (https://github.com/waylan), |
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Dmitry Shachnev (https://github.com/mitya57) and Isaac Muse (https://github.com/facelessuser). |
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Copyright 2007-2018 The Python Markdown Project (v. 1.7 and later) |
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Copyright 2004, 2005, 2006 Yuri Takhteyev (v. 0.2-1.6b) |
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Copyright 2004 Manfred Stienstra (the original version) |
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License: BSD (see LICENSE.md for details). |
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Legacy Attributes Extension |
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=========================== |
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An extension to Python Markdown which implements legacy attributes. |
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Prior to Python-Markdown version 3.0, the Markdown class had an `enable_attributes` |
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keyword which was on by default and provided for attributes to be defined for elements |
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using the format `{@key=value}`. This extension is provided as a replacement for |
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backward compatibility. New documents should be authored using `attr_lists`. However, |
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numerous documents exist which have been using the old attribute format for many |
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years. This extension can be used to continue to render those documents correctly. |
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""" |
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import re |
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from markdown.treeprocessors import Treeprocessor, isString |
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from markdown.extensions import Extension |
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ATTR_RE = re.compile(r'\{@([^\}]*)=([^\}]*)}') # {@id=123} |
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class LegacyAttrs(Treeprocessor): |
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def run(self, doc): |
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"""Find and set values of attributes ({@key=value}). """ |
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for el in doc.iter(): |
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alt = el.get('alt', None) |
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if alt is not None: |
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el.set('alt', self.handleAttributes(el, alt)) |
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if el.text and isString(el.text): |
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el.text = self.handleAttributes(el, el.text) |
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if el.tail and isString(el.tail): |
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el.tail = self.handleAttributes(el, el.tail) |
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def handleAttributes(self, el, txt): |
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""" Set attributes and return text without definitions. """ |
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def attributeCallback(match): |
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el.set(match.group(1), match.group(2).replace('\n', ' ')) |
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return ATTR_RE.sub(attributeCallback, txt) |
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class LegacyAttrExtension(Extension): |
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def extendMarkdown(self, md): |
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md.treeprocessors.register(LegacyAttrs(md), 'legacyattrs', 15) |
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def makeExtension(**kwargs): # pragma: no cover |
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return LegacyAttrExtension(**kwargs)
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