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# IVLE - Informatics Virtual Learning Environment
# Copyright (C) 2007-2009 The University of Melbourne
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
class Breadcrumber(object):
def __init__(self, req):
self.req = req
self.index = {}
for plugin in req.config.plugins.values():
if hasattr(plugin, 'breadcrumbs'):
for cls in plugin.breadcrumbs:
assert cls not in self.index
self.index[cls] = plugin.breadcrumbs[cls]
def crumb(self, obj):
if type(obj) not in self.index:
return None
return self.index[type(obj)](self.req, obj)
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