Milan Andric wrote:
> Hello,
>
> I'm using markdown as an output filter in my templates.
>
> I'd like to extend it somehow so that it can parse a ![][123] image
> reference but the reference number will be a file object id or a
> inline reference, etc. So then the object would get rendered
> appropriately and dynamically from the db.
>
> So how would i extend the markdown filter?
I have done a similar thing. I wanted the user to be able to use
[[ name=concentration value=10 ]] in a wiki to get a text entry box on the HTML
page
like <input name=concentration value=10>
I used a template filter.
In my HTML file I have:
{% load wiki_extensions %}
blah blah ...
{{ description | markdown | wikiform }}
where description is the field name that contains the wiki text.
In app/templatetags/ I have a file wiki_extensions.py
# My custom tag and filter definitions.
import re
from django.template import Library
register = Library()
def wikiform(content):
'''
Extends the Wiki syntax by providing a wiki input text box for forms.
wiki_input is something like this:
[[ name=speed value='5.0' ]]
The HTML output will be this:
<input name="speed" value="5.0">
Standard Input Attributes defined by www.w3.org:
name: name of the control to send back to server. REQUIRED
type: type of control to create.
value: initial value of the control.
size: tells the user agent the initial width of the control in
characters.
maxlength: the maximum number of characters the user may enter.
(only name is a required attribute)
'''
pattern_inputbox = re.compile(r'\[\[.*\]\]') # pattern matches [[ anything
]]
pattern_attribute = re.compile(r'\w+=\w+') # pattern matches 'word=value'
instances
# Find all attributes for the input text field and get a list of matches.
input_boxes = pattern_inputbox.findall(content)
for input_box in input_boxes:
data = ''
attributes = pattern_attribute.findall(input_box)
for attribute in attributes:
(the_attribute, the_value) = attribute.split('=')
data = data + "%s='%s' " % (the_attribute, the_value)
replacement = '<input %s/>' % data
content = pattern_inputbox.sub(replacement, content, 1)
return content
# If you are not using Python 2.4 i.e. your using 2.3 then place the
# register.filter lines here after the defines above, otherwise you
# will get a NameError.
register.filter('wikiform', wikiform)
--
Michael Lake
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