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# Copyright (c) 2010-2024 openpyxl
from copy import copy
from openpyxl.compat import deprecated
class StyleProxy:
"""
Proxy formatting objects so that they cannot be altered
"""
__slots__ = ('__target')
def __init__(self, target):
self.__target = target
def __repr__(self):
return repr(self.__target)
def __getattr__(self, attr):
return getattr(self.__target, attr)
def __setattr__(self, attr, value):
if attr != "_StyleProxy__target":
raise AttributeError("Style objects are immutable and cannot be changed."
"Reassign the style with a copy")
super().__setattr__(attr, value)
def __copy__(self):
"""
Return a copy of the proxied object.
"""
return copy(self.__target)
def __add__(self, other):
"""
Add proxied object to another instance and return the combined object
"""
return self.__target + other
@deprecated("Use copy(obj) or cell.obj = cell.obj + other")
def copy(self, **kw):
"""Return a copy of the proxied object. Keyword args will be passed through"""
cp = copy(self.__target)
for k, v in kw.items():
setattr(cp, k, v)
return cp
def __eq__(self, other):
return self.__target == other
def __ne__(self, other):
return not self == other
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