use bleach.linkify to make links in markdown clickable automagically, fixes #64

src/news/templates/news_detail.html

@@ -14,5 +14,5 @@
     {% endif %}
     <h3>{{ news_item.title }} <small>{{ news_item.published_at|date:"Y-m-d" }}</small></h3>
   </div>
-  {{ news_item.content|trustedcommonmark }}
+  {{ news_item.content|trustedcommonmark|urlize }}
 {% endblock %}

src/news/templates/news_index.html

@@ -13,7 +13,7 @@ News | {{ block.super }}
   <div>
     <h3><a href="{% url 'news:detail' slug=item.slug %}">{{ item.title }}</a> <small>{{ item.published_at|date:"Y-m-d" }}</small></h3>
   </div>
-  {{ item.content|trustedcommonmark }}
+  {{ item.content|trustedcommonmark|urlize }}
   {% if not forloop.last %}
     <hr />
   {% endif %}

src/utils/templatetags/commonmark.py

@@ -1,4 +1,5 @@
 import commonmark, bleach
+from html5lib.tokenizer import HTMLTokenizer
 
 from django import template
 from django.utils.safestring import mark_safe
@@ -7,21 +8,22 @@ from django.template.defaultfilters import stringfilter
 register = template.Library()
 
 
-@register.filter
+@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 mark_safe(renderer.render(ast))
+    return bleach.linkify(renderer.render(ast), skip_pre=True, parse_email=True, tokenizer=HTMLTokenizer)
 
-@register.filter
+
+@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 mark_safe(renderer.render(ast))
+    return bleach.linkify(renderer.render(ast), skip_pre=True, parse_email=True, tokenizer=HTMLTokenizer)