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from os.path import split, join
try:
# Python 2.5 bundled elementtree
from xml.etree import ElementTree, ElementInclude
except ImportError:
# Pre-2.5 third party elementtree
from elementtree import ElementTree, ElementInclude
class XML_controller(dict):
"""Controller part of the MVC model for a user selection facility."""
def __init__(self, node, actions):
"""Verify that everything is labeled and has an action."""
for child in node:
if not child.get('label'):
raise ValueError, 'Element %s has no label' % child.tag
if not actions.has_key(child.tag):
raise ValueError, 'Element tag %s not in actions' % child.tag
self[child.get('label')] = child
self.actions = dict(actions)
def choose(self, label):
"""Run the code that goes with labe."""
self.actions[self[label].tag](self[label])
class Loader(object):
"""Custmom loader for XInclude processing to fix relative addressing."""
def __init__(self, name):
self.base = split(name)[0]
def __call__(self, href, typ, encoding=None):
"""Fix relative references and call the default loader."""
return ElementInclude.default_loader(join(self.base, href), typ, encoding)
def load_menus(path):
"""Load the file path."""
menus = ElementTree.parse(path)
ElementInclude.include(menus.getroot(), loader=Loader(path))
return menus
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