Add insert_code_chunks template filter

This basic version actually removes them. Addition to be coming later

blog/templates/blog/post.html

@@ -1,10 +1,7 @@
 <div class="post">
     <h3>{% if title_links %}<a href="{% url 'blog:read' post.created_at.year post.created_at.month post.created_at.day post.slug %}">{% endif %}{{ post.title }}{% if title_links %}</a>{% else %}<div class="plusone-container"><div class="g-plusone" data-annotation="inline" data-size="small" data-width="300"></div></div>{% endif %}</h3>
     <p class="article-date">{{ post.created_at|date:'m-d-Y :: H:i' }} by {{ post.user.first_name }} {{ post.user.last_name }}</p>
-    {% comment %}
     {{ post.content|insert_code_chunks }}
-    {% endcomment %}
-    {{ post.content|safe }}
 {% if post.tags.all %}
     <p class="article-tags">Tags:
 {% for tag in post.tags.all %}

blog/templatetags/code_chunks.py

@@ -1,11 +1,12 @@
 from django import template
 from django.template.defaultfilters import stringfilter
 from django.utils.safestring import mark_safe
-import logging
+import logging, re
 from pygments import highlight
 from pygments.lexers import get_lexer_by_name
 from pygments.formatters import HtmlFormatter
 from gergelypolonkaiweb.solarized_dark import SolarizedDarkStyle
+from blog.models import CodeChunk
 
 register = template.Library()
 
@@ -27,6 +28,48 @@ def hilite(language, code):
     formatter = CodeFormatter(style = SolarizedDarkStyle, linenos = False, cssclass = language + " code", noclasses = True)
     return highlight(code, lexer, formatter)
 
+@register.filter(needs_autoescape=True)
+@stringfilter
+def insert_code_chunks(value, autoescape=None):
+    p = re.compile('\[\$ code:(?P<lang>[^:]+):(?P<slug>[^ ]+) \$\]')
+    i = p.finditer(value)
+    diff = 0
+
+    for match in i:
+        end, start = match.span()
+        oldlen = start - end
+        start += diff
+        end += diff
+        try:
+            chunk = CodeChunk.objects.get(language = match.group('lang'), slug = match.group('slug'))
+            # TODO: This is an ugly hack, as it includes template logic in code. BAD!
+            newstr = "<div class=\"code-chunk\">" + hilite(match.group('lang'), chunk.content) + "</div>"
+        except CodeChunk.DoesNotExist:
+            newstr = ""
+
+        newlen = len(newstr)
+        value = value[:end] + newstr + value[start:]
+        diff += newlen - oldlen
+
+    p = re.compile('\[\$ code:(?P<lang>[^:]+):(?P<code>.+?) \$\]', re.DOTALL)
+    i = p.finditer(value)
+    diff = 0
+
+    for match in i:
+        end, start = match.span()
+        oldlen = start - end
+        start += diff
+        end += diff
+
+        # TODO: This is an ugly hack, as it includes template logic in code. BAD!
+        newstr = "<div class=\"code-chunk\">" + hilite(match.group('lang'), match.group('code')) + "</div>"
+
+        newlen = len(newstr)
+        value = value[:end] + newstr + value[start:]
+        diff += newlen - oldlen
+
+    return mark_safe(value)
+
 @register.filter(needs_autoescape=True)
 @stringfilter
 def syhilite(value, language, autoescape=None):