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89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
'''
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WikiLinks Extension for Python-Markdown
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======================================
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Converts [[WikiLinks]] to relative links.
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See <https://Python-Markdown.github.io/extensions/wikilinks>
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for documentation.
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Original code Copyright [Waylan Limberg](http://achinghead.com/).
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All changes Copyright The Python Markdown Project
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License: [BSD](http://www.opensource.org/licenses/bsd-license.php)
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'''
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from __future__ import absolute_import
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from __future__ import unicode_literals
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from . import Extension
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from ..inlinepatterns import Pattern
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from ..util import etree
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import re
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def build_url(label, base, end):
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""" Build a url from the label, a base, and an end. """
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clean_label = re.sub(r'([ ]+_)|(_[ ]+)|([ ]+)', '_', label)
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return '%s%s%s' % (base, clean_label, end)
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class WikiLinkExtension(Extension):
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def __init__(self, *args, **kwargs):
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self.config = {
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'base_url': ['/', 'String to append to beginning or URL.'],
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'end_url': ['/', 'String to append to end of URL.'],
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'html_class': ['wikilink', 'CSS hook. Leave blank for none.'],
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'build_url': [build_url, 'Callable formats URL from label.'],
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}
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super(WikiLinkExtension, self).__init__(*args, **kwargs)
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def extendMarkdown(self, md, md_globals):
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self.md = md
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# append to end of inline patterns
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WIKILINK_RE = r'\[\[([\w0-9_ -]+)\]\]'
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wikilinkPattern = WikiLinks(WIKILINK_RE, self.getConfigs())
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wikilinkPattern.md = md
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md.inlinePatterns.add('wikilink', wikilinkPattern, "<not_strong")
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class WikiLinks(Pattern):
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def __init__(self, pattern, config):
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super(WikiLinks, self).__init__(pattern)
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self.config = config
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def handleMatch(self, m):
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if m.group(2).strip():
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base_url, end_url, html_class = self._getMeta()
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label = m.group(2).strip()
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url = self.config['build_url'](label, base_url, end_url)
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a = etree.Element('a')
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a.text = label
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a.set('href', url)
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if html_class:
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a.set('class', html_class)
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else:
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a = ''
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return a
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def _getMeta(self):
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""" Return meta data or config data. """
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base_url = self.config['base_url']
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end_url = self.config['end_url']
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html_class = self.config['html_class']
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if hasattr(self.md, 'Meta'):
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if 'wiki_base_url' in self.md.Meta:
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base_url = self.md.Meta['wiki_base_url'][0]
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if 'wiki_end_url' in self.md.Meta:
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end_url = self.md.Meta['wiki_end_url'][0]
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if 'wiki_html_class' in self.md.Meta:
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html_class = self.md.Meta['wiki_html_class'][0]
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return base_url, end_url, html_class
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def makeExtension(*args, **kwargs):
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return WikiLinkExtension(*args, **kwargs)
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