# Copyright (c) 2006-2007 Thomas Lotze
# See also LICENSE.txt
from urlparse import urljoin
import ophelia.request
import ophelia.util
class Navigation(object):
"""Stores navigation info, builds hierarchical and breadcrumb menus.
"""
chapter = None
chapter_title = None
@property
def current(self):
return self.request.current
def __init__(self, home=None):
self.request = ophelia.request.get_request()
self.site = self.request.site
self.uri = self.site + self.request.path
if home is None:
self.home = self.site
else:
self.home = home
self.breadcrumbs = {}
self.menu = ophelia.util.Namespace()
self.alt_lang_uris = {}
def set_chapter(self, title):
self.chapter = self.current
self.chapter_title = title
def add_menu(self, entries, root_title=None, root=None):
root = urljoin(self.current, root)
self.menu[root] = ophelia.util.Namespace(
url=root,
root_title=root_title,
entry_pairs=[(urljoin(root, href), title)
for href, title in entries],
entries=[dict(url=urljoin(root, href),
title=title) for href, title in entries],
)
def set_breadcrumb(self, title):
self.breadcrumbs[self.current] = title
def iter_breadcrumbs(self):
menu = {}
for uri in self.request.history:
title = self.breadcrumbs.get(uri) or menu.get(uri)
if title:
yield (uri, title)
menu = self.menu.get(uri, {})
if menu:
menu = dict(menu.entry_pairs)
def conditional_link(self, href, title):
if href == self.uri:
return title
else:
return '<a href="%s" title="Nav: %s">%s</a>' % \
(href, title, title)
def display_breadcrumbs(self, sep):
bc = [self.conditional_link(href, title)
for href, title in self.iter_breadcrumbs()]
return sep.join(bc)
def display_menu(self, depth=3, uri=None):
lines = ["<dl>"]
if uri is None:
uri = self.home
root_title = self.menu[uri].root_title
if root_title:
lines.append("<dt>%s</dt>" % self.conditional_link(
urljoin(self.uri, uri), root_title))
def display(uri, deeper):
for href, title in self.menu[uri].entry_pairs:
lines.append("<dt>%s</dt>" %
self.conditional_link(href, title))
if deeper and href in self.menu:
lines.append("<dd><dl>")
display(href, deeper-1)
lines.append("</dl></dd>")
display(uri, depth-1)
lines.append("</dl>")
return '\n'.join(lines)
def alt_langs(self, **kwargs):
for lang, path_seg in kwargs.iteritems():
self.alt_lang_uris[lang] = urljoin(
self.alt_lang_uris.get(lang, self.current),
path_seg)
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