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#!/usr/bin/env python3
#
# serializer.py
"""
Serializer for cascading style sheets.
.. versionadded:: 0.2.0
"""
#
# Copyright © 2021 Dominic Davis-Foster <dominic@davis-foster.co.uk>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
# DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
# OR OTHER DEALINGS IN THE SOFTWARE.
#
# stdlib
from contextlib import contextmanager
from typing import Iterator
# 3rd party
from domdf_python_tools.words import TAB
try:
# 3rd party
import css_parser # type: ignore
except ImportError: # pragma: no cover
# 3rd party
import cssutils as css_parser # type: ignore
__all__ = ["CSSSerializer"]
class CSSSerializer(css_parser.CSSSerializer):
r"""
Serializes a :class:`~.StyleSheet` and its parts.
This controls the formatting of the style sheet.
:param indent: The indent to use, such as a tab (``\t``), two spaces or four spaces.
:param trailing_semicolon: Whether to add a semicolon to the end of the final property.
:param indent_closing_brace:
:param minify: Minify the CSS. Overrides all other options.
.. autosummary-widths:: 5/16
"""
def __init__(
self,
*,
indent: str = TAB,
trailing_semicolon: bool = False,
indent_closing_brace: bool = False,
minify: bool = False,
):
super().__init__()
self.indent = str(indent)
self.trailing_semicolon = trailing_semicolon
self.indent_closing_brace = indent_closing_brace
self.minify = minify
def reset_style(self) -> None:
"""
Reset the serializer to its default style.
"""
# Reset CSS Parser to defaults
self.prefs.useDefaults()
if self.minify:
self.prefs.useMinified()
else:
# Formatting preferences
self.prefs.omitLastSemicolon = not self.trailing_semicolon
self.prefs.indentClosingBrace = self.indent_closing_brace
self.prefs.indent = self.indent
@contextmanager
def use(self) -> Iterator:
"""
Contextmanager to use this serializer for the scope of the ``with`` block.
"""
# if css_parser.ser is self:
# yield
# return
#
current_serializer = css_parser.ser
self.reset_style()
try:
css_parser.ser = self
yield
finally:
css_parser.ser = current_serializer
|
