|
from __future__ import unicode_literals
from django.core.urlresolvers import resolve, get_script_prefix
from rest_framework.utils.formatting import get_view_name
def get_breadcrumbs(url):
"""
Given a url returns a list of breadcrumbs, which are each a
tuple of (name, url).
"""
from rest_framework.views import APIView
def breadcrumbs_recursive(url, breadcrumbs_list, prefix, seen):
"""
Add tuples of (name, url) to the breadcrumbs list,
progressively chomping off parts of the url.
"""
try:
(view, unused_args, unused_kwargs) = resolve(url)
except Exception:
pass
else:
# Check if this is a REST framework view,
# and if so add it to the breadcrumbs
cls = getattr(view, 'cls', None)
if cls is not None and issubclass(cls, APIView):
# Don't list the same view twice in a row.
# Probably an optional trailing slash.
if not seen or seen[-1] != view:
suffix = getattr(view, 'suffix', None)
name = get_view_name(view.cls, suffix)
breadcrumbs_list.insert(0, (name, prefix + url))
seen.append(view)
if url == '':
# All done
return breadcrumbs_list
elif url.endswith('/'):
# Drop trailing slash off the end and continue to try to
# resolve more breadcrumbs
url = url.rstrip('/')
return breadcrumbs_recursive(url, breadcrumbs_list, prefix, seen)
# Drop trailing non-slash off the end and continue to try to
# resolve more breadcrumbs
url = url[:url.rfind('/') + 1]
return breadcrumbs_recursive(url, breadcrumbs_list, prefix, seen)
prefix = get_script_prefix().rstrip('/')
url = url[len(prefix):]
return breadcrumbs_recursive(url, [], prefix, [])
|
