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# -*- coding: utf-8 -*-
#
# Copyright (c) 2020 Martin Owens <doctormo@gmail.com>
# Thomas Holder <thomas.holder@schrodinger.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
"""
Interface for the Use and Symbol elements
"""
from ..transforms import Transform
from ._groups import Group, GroupBase
from ._base import ShapeElement
class Symbol(GroupBase):
"""SVG symbol element"""
tag_name = "symbol"
class Use(ShapeElement):
"""A 'use' element that links to another in the document"""
tag_name = "use"
@classmethod
def new(cls, elem, x, y, **attrs): # pylint: disable=arguments-differ
ret = super().new(x=x, y=y, **attrs)
ret.href = elem
return ret
def get_path(self):
"""Returns the path of the cloned href plus any transformation
.. versionchanged:: 1.3
include transform of the referenced element
"""
path = self.href.path
path = path.transform(self.href.transform)
return path
def effective_style(self):
"""Href's style plus this object's own styles"""
style = self.href.effective_style()
style.update(self.style)
return style
def unlink(self):
"""Unlink this clone, replacing it with a copy of the original"""
copy = self.href.copy()
if isinstance(copy, Symbol):
group = Group(**copy.attrib)
group.extend(copy)
copy = group
copy.transform = self.transform @ copy.transform
copy.transform.add_translate(
self.to_dimensionless(self.get("x", 0)),
self.to_dimensionless(self.get("y", 0)),
)
copy.style = self.style + copy.style
# Preserve the id of the clone to not break links that link the <use>
# As we replace exactly one element by exactly one, this should be safe.
old_id = self.get_id()
self.replace_with(copy)
copy.set_random_ids()
copy.set_id(old_id)
return copy
def shape_box(self, transform=None):
"""BoundingBox of the unclipped shape
.. versionadded:: 1.1"""
effective_transform = Transform(transform) @ self.transform
return self.href.bounding_box(effective_transform)
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