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98 lines
3.2 KiB
Python
98 lines
3.2 KiB
Python
4 months ago
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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](https://opensource.org/licenses/bsd-license.php)
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"""
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Converts `[[WikiLinks]]` to relative links.
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See the [documentation](https://Python-Markdown.github.io/extensions/wikilinks)
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for details.
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"""
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from __future__ import annotations
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from . import Extension
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from ..inlinepatterns import InlineProcessor
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import xml.etree.ElementTree as etree
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import re
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from typing import Any
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def build_url(label: str, base: str, end: str) -> str:
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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 '{}{}{}'.format(base, clean_label, end)
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class WikiLinkExtension(Extension):
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""" Add inline processor to Markdown. """
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def __init__(self, **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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""" Default configuration options. """
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super().__init__(**kwargs)
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def extendMarkdown(self, md):
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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 = WikiLinksInlineProcessor(WIKILINK_RE, self.getConfigs())
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wikilinkPattern.md = md
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md.inlinePatterns.register(wikilinkPattern, 'wikilink', 75)
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class WikiLinksInlineProcessor(InlineProcessor):
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""" Build link from `wikilink`. """
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def __init__(self, pattern: str, config: dict[str, Any]):
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super().__init__(pattern)
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self.config = config
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def handleMatch(self, m: re.Match[str], data: str) -> tuple[etree.Element | str, int, int]:
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if m.group(1).strip():
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base_url, end_url, html_class = self._getMeta()
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label = m.group(1).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, m.start(0), m.end(0)
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def _getMeta(self) -> tuple[str, str, str]:
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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(**kwargs): # pragma: no cover
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return WikiLinkExtension(**kwargs)
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