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