1 ### -*- coding: utf-8 -*- ####################################################

     2 ##############################################################################

     3 #

     4 # Copyright (c) 2008 Thierry Florac <tflorac AT ulthar.net>

     5 # All Rights Reserved.

     6 #

     7 # This software is subject to the provisions of the Zope Public License,

     8 # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

     9 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

    10 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    11 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

    12 # FOR A PARTICULAR PURPOSE.

    13 #

    14 ##############################################################################

    15 """

    16 

    17 $Id: $

    18 """

    19 

    20 __version__   = "$Revision: $"

    21 __release__   = "$Id: $"

    22 __docformat__ = "restructuredtext"

    23  

    24 # import standard packages

    25 

    26 # import Zope3 interfaces

    27 from zope.app.file.interfaces import IFile

    28 from zope.schema.interfaces import IBytes

    29 from z3c.form.interfaces import IFileWidget

    30 

    31 # import local interfaces

    32 

    33 # import Zope3 packages

    34 from zope import component

    35 from zope.app.file import File

    36 from zope.schema.fieldproperty import FieldProperty

    37 from z3c.form.converter import FileUploadDataConverter as BaseDataConverter

    38 

    39 # import local packages

    40 

    41 

    42 class FileUploadDataConverter(BaseDataConverter):

    43 

    44     component.adapts(IBytes, IFileWidget)

    45 

    46     def toWidgetValue(self, value):

    47         return value or ''