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/src/zope/size/interfaces.py
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##############################################################################
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#
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# Copyright (c) 2002 Zope Foundation and Contributors.
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# All Rights Reserved.
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#
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# This software is subject to the provisions of the Zope Public License,
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# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
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# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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# FOR A PARTICULAR PURPOSE.
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#
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##############################################################################
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"""Interfaces that give the size of an object.
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"""
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from zope.interface import Interface




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class ISized(Interface):




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    """










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    An object that is sized in some unit.










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    Basic units:










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    - 'byte'










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    - 'item'  for example, number of subobjects for a folder










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    - None    for unsized things










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    - 'line'  for source-code like things










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    """










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    def sizeForSorting():




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        """Returns a tuple (basic_unit, amount)










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        Used for sorting among different kinds of sized objects.










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        'amount' need only be sortable among things that share the










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        same basic unit."""










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    def sizeForDisplay():




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        """Returns a string giving the size. The output string may be a










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        zope.i18nmessageid.message.Message with an embedded mapping, so










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        it should be translated with zope.i18n.translate()










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        """
























    

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