Fix commonmark template filter to turn urls and emails into clickables.

src/utils/templatetags/commonmark.py

@@ -1,5 +1,5 @@
-import commonmark, bleach
-from html5lib.tokenizer import HTMLTokenizer
+import commonmark
+import bleach
 
 from django import template
 from django.utils.safestring import mark_safe
@@ -7,23 +7,24 @@ from django.template.defaultfilters import stringfilter
 
 register = template.Library()
 
+def parse_commonmark(value):
+    parser = commonmark.Parser()
+    renderer = commonmark.HtmlRenderer()
+    ast = parser.parse(value)
+    return mark_safe(renderer.render(ast))
+
 
 @register.filter(is_safe=True)
 @stringfilter
 def trustedcommonmark(value):
     """Returns HTML given some commonmark Markdown. Also allows real HTML, so do not use this with untrusted input."""
-    parser = commonmark.Parser()
-    renderer = commonmark.HtmlRenderer()
-    ast = parser.parse(value)
-    return bleach.linkify(renderer.render(ast), skip_pre=True, parse_email=True, tokenizer=HTMLTokenizer)
+    linkified_value = bleach.linkify(value, parse_email=True)
+    return parse_commonmark(linkified_value)
 
 
 @register.filter(is_safe=True)
 @stringfilter
 def untrustedcommonmark(value):
     """Returns HTML given some commonmark Markdown. Cleans actual HTML from input using bleach, suitable for use with untrusted input."""
-    parser = commonmark.Parser()
-    renderer = commonmark.HtmlRenderer()
-    ast = parser.parse(bleach.clean(value))
-    return bleach.linkify(renderer.render(ast), skip_pre=True, parse_email=True, tokenizer=HTMLTokenizer)
-
+    linkified_value = bleach.linkify(bleach.clean(value), parse_email=True)
+    return parse_commonmark(linkified_value)