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# encoding: utf-8
# This file is part of py-serializable
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0
# Copyright (c) Paul Horton. All Rights Reserved.
"""
XML-specific functionality.
"""
__all__ = ['xs_normalizedString', 'xs_token']
from re import compile as re_compile
# region normalizedString
__NORMALIZED_STRING_FORBIDDEN_SEARCH = re_compile(r'\r\n|\t|\n|\r')
__NORMALIZED_STRING_FORBIDDEN_REPLACE = ' '
def xs_normalizedString(s: str) -> str:
"""Make a ``normalizedString``, adhering XML spec.
.. epigraph::
*normalizedString* represents white space normalized strings.
The `·value space· <https://www.w3.org/TR/xmlschema-2/#dt-value-space>`_ of normalizedString is the set of
strings that do not contain the carriage return (#xD), line feed (#xA) nor tab (#x9) characters.
The `·lexical space· <https://www.w3.org/TR/xmlschema-2/#dt-lexical-space>`_ of normalizedString is the set of
strings that do not contain the carriage return (#xD), line feed (#xA) nor tab (#x9) characters.
The `·base type· <https://www.w3.org/TR/xmlschema-2/#dt-basetype>`_ of normalizedString is
`string <https://www.w3.org/TR/xmlschema-2/#string>`_.
-- the `XML schema spec <http://www.w3.org/TR/xmlschema-2/#normalizedString>`_
"""
return __NORMALIZED_STRING_FORBIDDEN_SEARCH.sub(
__NORMALIZED_STRING_FORBIDDEN_REPLACE,
s)
# endregion
# region token
__TOKEN_MULTISTRING_SEARCH = re_compile(r' {2,}')
__TOKEN_MULTISTRING_REPLACE = ' '
def xs_token(s: str) -> str:
"""Make a ``token``, adhering XML spec.
.. epigraph::
*token* represents tokenized strings.
The `·value space· <https://www.w3.org/TR/xmlschema-2/#dt-value-space>`_ of token is the set of strings that do
not contain the carriage return (#xD), line feed (#xA) nor tab (#x9) characters, that have no leading or
trailing spaces (#x20) and that have no internal sequences of two or more spaces.
The `·lexical space· <https://www.w3.org/TR/xmlschema-2/#dt-lexical-space>`_ of token is the set of strings that
do not contain the carriage return (#xD), line feed (#xA) nor tab (#x9) characters, that have no leading or
trailing spaces (#x20) and that have no internal sequences of two or more spaces.
The `·base type· <https://www.w3.org/TR/xmlschema-2/#dt-basetype>`_ of token is
`normalizedString <https://www.w3.org/TR/xmlschema-2/#normalizedString>`_.
-- the `XML schema spec <http://www.w3.org/TR/xmlschema-2/#token>`_
"""
return __TOKEN_MULTISTRING_SEARCH.sub(
__TOKEN_MULTISTRING_REPLACE,
xs_normalizedString(s).strip())
# endregion
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