Hackish and ugly implementation of automagical links

misago/markdown/extensions/magiclinks.py

@@ -0,0 +1,45 @@
+#-*- coding: utf-8 -*-
+import re
+import markdown
+from markdown.inlinepatterns import LinkPattern
+from markdown.postprocessors import RawHtmlPostprocessor
+from markdown.util import etree
+
+# Global vars
+MAGICLINKS_RE = re.compile(r'(?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:\'".,<>?«»“”‘’]))', re.UNICODE)
+
+class MagicLinksExtension(markdown.Extension):
+    def extendMarkdown(self, md):
+        md.registerExtension(self)
+        md.treeprocessors.add('mi_magiclinks',
+                              MagicLinksTreeprocessor(md),
+                              '_end')
+
+
+class MagicLinksTreeprocessor(markdown.treeprocessors.Treeprocessor):
+    def run(self, root):
+        return self.walk_tree(root)
+
+    def walk_tree(self, node):
+        def parse_link(matchobj):
+            link = LinkPattern(MAGICLINKS_RE, self.markdown)
+            href = link.sanitize_url(link.unescape(matchobj.group(0).strip()))
+            if href:
+                href = self.escape(href)
+                return self.markdown.htmlStash.store('<a href="%(href)s">%(href)s</a>' % {'href': href}, safe=True)
+            else:
+                return matchobj.group(0)
+
+        if node.tag not in ['code', 'pre', 'a', 'img']:
+            if node.text and unicode(node.text).strip():
+                node.text = MAGICLINKS_RE.sub(parse_link, unicode(node.text))
+            if node.tail and unicode(node.tail).strip():
+                node.tail = MAGICLINKS_RE.sub(parse_link, unicode(node.tail))
+            for i in node:
+                self.walk_tree(i)
+
+    def escape(self, html):
+        html = html.replace('&', '&amp;')
+        html = html.replace('<', '&lt;')
+        html = html.replace('>', '&gt;')
+        return html.replace('"', '&quot;')

misago/settings_base.py

@@ -144,6 +144,7 @@ PROFILE_EXTENSIONS = (
 MARKDOWN_EXTENSIONS = (
     'misago.markdown.extensions.quotes.QuoteTitlesExtension',
     'misago.markdown.extensions.mentions.MentionsExtension',
+    'misago.markdown.extensions.magiclinks.MagicLinksExtension',
 )
 
 # Name of root urls configuration