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# Copyright 2016 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import os
from cpp_namespace_environment import CppNamespaceEnvironment
from model import Model, UnixName
from schema_loader import SchemaLoader
def _GenerateFilenames(full_namespace):
# Try to find the file defining the namespace. Eg. for
# nameSpace.sub_name_space.Type' the following heuristics looks for:
# 1. name_space_sub_name_space.json,
# 2. name_space_sub_name_space.idl,
# 3. sub_name_space.json,
# 4. sub_name_space.idl,
# 5. etc.
sub_namespaces = full_namespace.split('.')
filenames = [ ]
basename = None
for namespace in reversed(sub_namespaces):
if basename is not None:
basename = UnixName(namespace + '.' + basename)
else:
basename = UnixName(namespace)
for ext in ['json', 'idl']:
filenames.append('%s.%s' % (basename, ext))
return filenames
class NamespaceResolver(object):
'''Resolves a type name into the namespace the type belongs to.
- |root| path to the root directory.
- |path| path to the directory with the API header files, relative to the
root.
- |include_rules| List containing tuples with (path, cpp_namespace_pattern)
used when searching for types.
- |cpp_namespace_pattern| Default namespace pattern
'''
def __init__(self, root, path, include_rules, cpp_namespace_pattern):
self._root = root
self._include_rules = [(path, cpp_namespace_pattern)] + include_rules
def ResolveNamespace(self, full_namespace):
'''Returns the model.Namespace object associated with the |full_namespace|,
or None if one can't be found.
'''
filenames = _GenerateFilenames(full_namespace)
for path, cpp_namespace in self._include_rules:
cpp_namespace_environment = None
if cpp_namespace:
cpp_namespace_environment = CppNamespaceEnvironment(cpp_namespace)
for filename in reversed(filenames):
filepath = os.path.join(path, filename);
if os.path.exists(os.path.join(self._root, filepath)):
schema = SchemaLoader(self._root).LoadSchema(filepath)[0]
return Model().AddNamespace(
schema,
filepath,
environment=cpp_namespace_environment)
return None
def ResolveType(self, full_name, default_namespace):
'''Returns the model.Namespace object where the type with the given
|full_name| is defined, or None if one can't be found.
'''
name_parts = full_name.rsplit('.', 1)
if len(name_parts) == 1:
if full_name not in default_namespace.types:
return None
return default_namespace
full_namespace, type_name = full_name.rsplit('.', 1)
namespace = self.ResolveNamespace(full_namespace)
if namespace and type_name in namespace.types:
return namespace
return None
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