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# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import copy
import json
import logging
import compiled_file_system as compiled_fs
from third_party.json_schema_compiler.model import UnixName
# Increment this if the data model changes for SidenavDataSource.
_VERSION = 1
class SidenavDataSource(object):
"""This class reads in and caches a JSON file representing the side navigation
menu.
"""
class Factory(object):
def __init__(self, compiled_fs_factory, json_path):
self._cache = compiled_fs_factory.Create(self._CreateSidenavDict,
SidenavDataSource,
version=_VERSION)
self._json_path = json_path
def Create(self, path):
"""Create a SidenavDataSource, binding it to |path|. |path| is the url
of the page that is being rendered. It is used to determine which item
in the sidenav should be highlighted.
"""
return SidenavDataSource(self._cache, self._json_path, path)
def _AddLevels(self, items, level):
"""Levels represent how deeply this item is nested in the sidenav. We
start at 2 because the top <ul> is the only level 1 element.
"""
for item in items:
item['level'] = level
if 'items' in item:
self._AddLevels(item['items'], level + 1)
def _CreateSidenavDict(self, json_path, json_str):
items = json.loads(json_str)
self._AddLevels(items, 2);
return items
def __init__(self, cache, json_path, path):
self._cache = cache
self._json_path = json_path
self._file_name = path.split('/')[-1]
def _AddSelected(self, items):
for item in items:
if item.get('fileName', '') == self._file_name:
item['selected'] = True
return True
if 'items' in item:
if self._AddSelected(item['items']):
item['child_selected'] = True
return True
return False
def get(self, key):
sidenav = copy.deepcopy(self._cache.GetFromFile(
'%s/%s_sidenav.json' % (self._json_path, key)))
self._AddSelected(sidenav)
return sidenav
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