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plotter-app/venv/lib/python3.8/site-packages/markdown/extensions/wikilinks.py

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+# WikiLinks Extension for Python-Markdown
+# ======================================
+
+# Converts [[WikiLinks]] to relative links.
+
+# See https://Python-Markdown.github.io/extensions/wikilinks
+# for documentation.
+
+# Original code Copyright [Waylan Limberg](http://achinghead.com/).
+
+# All changes Copyright The Python Markdown Project
+
+# License: [BSD](https://opensource.org/licenses/bsd-license.php)
+
+"""
+Converts `[[WikiLinks]]` to relative links.
+
+See the [documentation](https://Python-Markdown.github.io/extensions/wikilinks)
+for details.
+"""
+
+from __future__ import annotations
+
+from . import Extension
+from ..inlinepatterns import InlineProcessor
+import xml.etree.ElementTree as etree
+import re
+from typing import Any
+
+
+def build_url(label: str, base: str, end: str) -> str:
+    """ Build a URL from the label, a base, and an end. """
+    clean_label = re.sub(r'([ ]+_)|(_[ ]+)|([ ]+)', '_', label)
+    return '{}{}{}'.format(base, clean_label, end)
+
+
+class WikiLinkExtension(Extension):
+    """ Add inline processor to Markdown. """
+
+    def __init__(self, **kwargs):
+        self.config = {
+            'base_url': ['/', 'String to append to beginning or URL.'],
+            'end_url': ['/', 'String to append to end of URL.'],
+            'html_class': ['wikilink', 'CSS hook. Leave blank for none.'],
+            'build_url': [build_url, 'Callable formats URL from label.'],
+        }
+        """ Default configuration options. """
+        super().__init__(**kwargs)
+
+    def extendMarkdown(self, md):
+        self.md = md
+
+        # append to end of inline patterns
+        WIKILINK_RE = r'\[\[([\w0-9_ -]+)\]\]'
+        wikilinkPattern = WikiLinksInlineProcessor(WIKILINK_RE, self.getConfigs())
+        wikilinkPattern.md = md
+        md.inlinePatterns.register(wikilinkPattern, 'wikilink', 75)
+
+
+class WikiLinksInlineProcessor(InlineProcessor):
+    """ Build link from `wikilink`. """
+
+    def __init__(self, pattern: str, config: dict[str, Any]):
+        super().__init__(pattern)
+        self.config = config
+
+    def handleMatch(self, m: re.Match[str], data: str) -> tuple[etree.Element | str, int, int]:
+        if m.group(1).strip():
+            base_url, end_url, html_class = self._getMeta()
+            label = m.group(1).strip()
+            url = self.config['build_url'](label, base_url, end_url)
+            a = etree.Element('a')
+            a.text = label
+            a.set('href', url)
+            if html_class:
+                a.set('class', html_class)
+        else:
+            a = ''
+        return a, m.start(0), m.end(0)
+
+    def _getMeta(self) -> tuple[str, str, str]:
+        """ Return meta data or `config` data. """
+        base_url = self.config['base_url']
+        end_url = self.config['end_url']
+        html_class = self.config['html_class']
+        if hasattr(self.md, 'Meta'):
+            if 'wiki_base_url' in self.md.Meta:
+                base_url = self.md.Meta['wiki_base_url'][0]
+            if 'wiki_end_url' in self.md.Meta:
+                end_url = self.md.Meta['wiki_end_url'][0]
+            if 'wiki_html_class' in self.md.Meta:
+                html_class = self.md.Meta['wiki_html_class'][0]
+        return base_url, end_url, html_class
+
+
+def makeExtension(**kwargs):  # pragma: no cover
+    return WikiLinkExtension(**kwargs)