Add a MarkdownInput widget, and make use of it

Signed-off-by: Skia <skia@libskia.so>

core/views/forms.py

@@ -27,7 +27,7 @@ from django import forms
 from django.db import transaction
 from django.core.exceptions import ValidationError
 from django.contrib.auth import logout, login, authenticate
-from django.forms import CheckboxSelectMultiple, Select, DateInput, TextInput, DateTimeInput
+from django.forms import CheckboxSelectMultiple, Select, DateInput, TextInput, DateTimeInput, Textarea
 from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ugettext
 from phonenumber_field.widgets import PhoneNumberInternationalFallbackWidget
@@ -73,6 +73,13 @@ class SelectDate(DateInput):
             attrs = {'class': "select_date"}
         return super(SelectDate, self).render(name, value, attrs)
 
+class MarkdownInput(Textarea):
+    def render(self, name, value, attrs=None):
+        output = '<div class="markdown_editor">%(content)s</div>' % {
+                'content': super(MarkdownInput, self).render(name, value, attrs),
+                }
+        return output
+
 class SelectFile(TextInput):
     def render(self, name, value, attrs=None):
         if attrs: