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| 1 ''' |
| 2 WikiLinks Extension for Python-Markdown |
| 3 ====================================== |
| 4 |
| 5 Converts [[WikiLinks]] to relative links. |
| 6 |
| 7 See <https://pythonhosted.org/Markdown/extensions/wikilinks.html> |
| 8 for documentation. |
| 9 |
| 10 Original code Copyright [Waylan Limberg](http://achinghead.com/). |
| 11 |
| 12 All changes Copyright The Python Markdown Project |
| 13 |
| 14 License: [BSD](http://www.opensource.org/licenses/bsd-license.php) |
| 15 |
| 16 ''' |
| 17 |
| 18 from __future__ import absolute_import |
| 19 from __future__ import unicode_literals |
| 20 from . import Extension |
| 21 from ..inlinepatterns import Pattern |
| 22 from ..util import etree |
| 23 import re |
| 24 |
| 25 |
| 26 def build_url(label, base, end): |
| 27 """ Build a url from the label, a base, and an end. """ |
| 28 clean_label = re.sub(r'([ ]+_)|(_[ ]+)|([ ]+)', '_', label) |
| 29 return '%s%s%s' % (base, clean_label, end) |
| 30 |
| 31 |
| 32 class WikiLinkExtension(Extension): |
| 33 |
| 34 def __init__(self, *args, **kwargs): |
| 35 self.config = { |
| 36 'base_url': ['/', 'String to append to beginning or URL.'], |
| 37 'end_url': ['/', 'String to append to end of URL.'], |
| 38 'html_class': ['wikilink', 'CSS hook. Leave blank for none.'], |
| 39 'build_url': [build_url, 'Callable formats URL from label.'], |
| 40 } |
| 41 |
| 42 super(WikiLinkExtension, self).__init__(*args, **kwargs) |
| 43 |
| 44 def extendMarkdown(self, md, md_globals): |
| 45 self.md = md |
| 46 |
| 47 # append to end of inline patterns |
| 48 WIKILINK_RE = r'\[\[([\w0-9_ -]+)\]\]' |
| 49 wikilinkPattern = WikiLinks(WIKILINK_RE, self.getConfigs()) |
| 50 wikilinkPattern.md = md |
| 51 md.inlinePatterns.add('wikilink', wikilinkPattern, "<not_strong") |
| 52 |
| 53 |
| 54 class WikiLinks(Pattern): |
| 55 def __init__(self, pattern, config): |
| 56 super(WikiLinks, self).__init__(pattern) |
| 57 self.config = config |
| 58 |
| 59 def handleMatch(self, m): |
| 60 if m.group(2).strip(): |
| 61 base_url, end_url, html_class = self._getMeta() |
| 62 label = m.group(2).strip() |
| 63 url = self.config['build_url'](label, base_url, end_url) |
| 64 a = etree.Element('a') |
| 65 a.text = label |
| 66 a.set('href', url) |
| 67 if html_class: |
| 68 a.set('class', html_class) |
| 69 else: |
| 70 a = '' |
| 71 return a |
| 72 |
| 73 def _getMeta(self): |
| 74 """ Return meta data or config data. """ |
| 75 base_url = self.config['base_url'] |
| 76 end_url = self.config['end_url'] |
| 77 html_class = self.config['html_class'] |
| 78 if hasattr(self.md, 'Meta'): |
| 79 if 'wiki_base_url' in self.md.Meta: |
| 80 base_url = self.md.Meta['wiki_base_url'][0] |
| 81 if 'wiki_end_url' in self.md.Meta: |
| 82 end_url = self.md.Meta['wiki_end_url'][0] |
| 83 if 'wiki_html_class' in self.md.Meta: |
| 84 html_class = self.md.Meta['wiki_html_class'][0] |
| 85 return base_url, end_url, html_class |
| 86 |
| 87 |
| 88 def makeExtension(*args, **kwargs): |
| 89 return WikiLinkExtension(*args, **kwargs) |
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