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from django import forms
from django.utils.safestring import mark_safe
import json
class RequiredFileUploadWidget(forms.FileInput):
def __init__(self, filename=None, attrs=None):
self.filename = filename
super(RequiredFileUploadWidget, self).__init__(attrs)
def render(self, name, value, attrs=None):
output = []
if value and hasattr(value, 'url'):
output.append('Current file: <a href="{0}">'.format(value.url))
if self.filename:
output.append(self.filename)
else:
output.append(value.name)
output.append('</a><br/>')
output.append("Upload new file: ")
output.append(super(RequiredFileUploadWidget, self).render(name, value, attrs))
return mark_safe(u''.join(output))
class PrettyPrintJsonWidget(forms.Textarea):
def render(self, name, value, attrs=None, renderer=None):
# This is mighty ugly -- we parse the json and then turn it back into json.
# Luckily this isn't called often :)
try:
value = json.dumps(json.loads(value), indent=2)
except ValueError:
# Don't try to do anything if it's not valid json
pass
t = super(PrettyPrintJsonWidget, self).render(name, value, attrs, renderer)
return t
class AdminJsonWidget(PrettyPrintJsonWidget):
def render(self, name, value, attrs=None, renderer=None):
attrs['cols'] = 100
return super(AdminJsonWidget, self).render(name, value, attrs, renderer)
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