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