# Copyright (C) 2019  Frank Sachsenheim
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.


from typing import TYPE_CHECKING, Any, Callable, Dict, Optional, Tuple, Union

from lxml import etree

if TYPE_CHECKING:
    from delb.nodes import _ElementWrappingNode, NodeBase, _TagDefinition  # noqa: F401


ElementAttributes = etree._Attrib
Filter = Callable[["NodeBase"], bool]
NodeSource = Union[str, "NodeBase", "_TagDefinition"]
_WrapperCache = Dict[int, "_ElementWrappingNode"]

LoaderResult = Tuple[Optional[etree._ElementTree], _WrapperCache]
Loader = Callable[[Any, etree.XMLParser], LoaderResult]
