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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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